Merge pull request #1770 from DSheirer/1769-release-0.6.0

#1769 Release version 0.6.0

.github/ISSUE_TEMPLATE/bug-report.md

@@ -0,0 +1,38 @@
+---
+name: Bug Report
+about: Create a report to help us improve sdrtrunk
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+**sdrtrunk Version**
+Indicate which sdrtrunk version you are using.  Use 'master-branch' if you are running the latest code.
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Application Log**
+If applicable, include either the full application log,or a snippet of the error logging.
+
+**Desktop (optional - complete the following information):**
+ - OS: [e.g. iOS]
+ - CPU Cores: [e.g. 4 cores]
+ - RAM:[e.g. 16GB]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,20 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: feature
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/how-to-question-or-does-the-software-support-xxx.md

@@ -0,0 +1,16 @@
+---
+name: How-To Question or Does The Software Support xxx
+about: End user question or support discussion
+title: STOP - Don't Use Issue Reporting to Post End-User Questions!!!
+labels: ''
+assignees: ''
+
+---
+
+STOP !!!!
+
+GitHub issues are for reporting software bugs or requesting enhancements.
+
+If you have a question about how to use the software, or if you want to know if sdrtrunk supports a protocol, tuner, or other aspect, please post your question in one of the Support forums.
+
+Visit: https://github.com/DSheirer/sdrtrunk/wiki

.github/workflows/gradle.yml

@@ -21,14 +21,14 @@ jobs:
     runs-on: ${{ matrix.os }}
 
     steps:
-      - uses: actions/checkout@v2
-      - name: Set up JDK 19
-        uses: actions/setup-java@v2
+      - uses: actions/checkout@v4
+      - name: Set up JDK 20
+        uses: actions/setup-java@v3
         with:
-          java-version: '19'
+          java-version: '20'
           distribution: 'liberica'
           java-package: 'jdk+fx'
       - name: Build with Gradle
-        uses: gradle/gradle-build-action@937999e9cc2425eddc7fd62d1053baf041147db7
+        uses: gradle/gradle-build-action@v2
         with:
           arguments: clean build

.github/workflows/nightly.yml

@@ -0,0 +1,47 @@
+# Create nightly release for Linux, Mac and Windows using the Linux runner.
+name: Nightly Release
+
+on:
+  push:
+    branches: [ master ]
+# Don't run nightly build for pull requests - uncomment to test changes to this action within scope of the PR review
+#  pull_request:
+#    branches: [ master ]
+
+jobs:
+  nightly:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up JDK 20
+        uses: actions/setup-java@v3
+        with:
+          java-version: '20'
+          distribution: 'liberica'
+          java-package: 'jdk+fx'
+
+      - name: Build Linux and Mac releases with Gradle
+        uses: gradle/gradle-build-action@v2
+        with:
+          arguments: runtimeZipOthers -PprojectVersion=nightly
+
+      - name: Build Windows release with Gradle
+        uses: gradle/gradle-build-action@v2
+        with:
+          arguments: runtimeZipWindows -PprojectVersion=nightly
+
+      - name: Create Build Info file
+        run: |
+          echo -e "ref: $GITHUB_REF \ncommit: $GITHUB_SHA\nbuild: $(date +"%Y-%m-%dT%H:%M:%SZ")" > build/image/build_info.txt
+
+      - name: Add build artifacts to nightly release
+        uses: pyTooling/Actions/releaser@main
+        with:
+          tag: nightly
+          rm: false
+          token: ${{ secrets.GITHUB_TOKEN }}
+          files: |
+            build/image/*.zip
+            build/image/build_info.txt

.idea/misc.xml

@@ -4,7 +4,7 @@
   <component name="FrameworkDetectionExcludesConfiguration">
     <file type="web" url="file://$PROJECT_DIR$" />
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_19_PREVIEW" project-jdk-name="liberica-19.0.1.fx" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_20_PREVIEW" project-jdk-name="liberica-20" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>

README.md

@@ -1,8 +1,10 @@
 ![Gradle Build](https://github.com/dsheirer/sdrtrunk/actions/workflows/gradle.yml/badge.svg)
+![Nightly Release](https://github.com/dsheirer/sdrtrunk/actions/workflows/nightly.yml/badge.svg)
 
 # sdrtrunk
 A cross-platform java application for decoding, monitoring, recording and streaming trunked mobile and related radio protocols using Software Defined Radios (SDR).
 
+* [Help/Wiki Home Page](https://github.com/DSheirer/sdrtrunk/wiki)
 * [Getting Started](https://github.com/DSheirer/sdrtrunk/wiki/Getting-Started)
 * [User's Manual](https://github.com/DSheirer/sdrtrunk/wiki/User-Manual)
 * [Download](https://github.com/DSheirer/sdrtrunk/releases)
@@ -18,6 +20,13 @@ All release versions of sdrtrunk are available from the [releases](https://githu
 * **(beta)** These versions are currently being tested for bugs and functionality prior to final release.
 * **(final)** These versions have been tested and are the current release version.
 
+## Download Nightly Software Build
+The [nightly](https://github.com/DSheirer/sdrtrunk/releases/tag/nightly) release contains current builds of the software 
+for all supported operating systems.  This version of the software may contain bugs and may not run correctly.  However, 
+it let's you preview the most recent changes and fixes before the next software release.  **Always backup your 
+playlist(s) before you use the nightly builds.**  Note: the nightly release is updated each time code changes are 
+committed to the code base, so it's not really 'nightly' as much as it is 'current'.
+
 ## Minimum System Requirements
 * **Operating System:** Windows (~~32 or~~ 64-bit), Linux (~~32 or~~ 64-bit) or Mac/Linux (64-bit, 10.14 or higher)
 * **CPU:** 4-core

artifacts/sdrplay-api-headers/v3_08/sdrplay_api.h

@@ -0,0 +1,230 @@
+#ifndef SDRPLAY_API_H
+#define SDRPLAY_API_H
+
+#include "sdrplay_api_dev.h"
+#include "sdrplay_api_rx_channel.h"
+#include "sdrplay_api_callback.h"
+
+//#if defined(_M_X64) || defined(_M_IX86)
+//#include "windows.h"
+//#elif defined (__GNUC__)
+typedef void *HANDLE;
+//#endif
+//
+//#ifndef _SDRPLAY_DLL_QUALIFIER
+//#if !defined(STATIC_LIB) && (defined(_M_X64) || defined(_M_IX86))
+//#define _SDRPLAY_DLL_QUALIFIER __declspec(dllimport)
+//#elif defined(STATIC_LIB) || defined(__GNUC__)
+//#define _SDRPLAY_DLL_QUALIFIER
+//#endif
+//#endif  // _SDRPLAY_DLL_QUALIFIER
+
+// Application code should check that it is compiled against the same API version
+// sdrplay_api_ApiVersion() returns the API version 
+#define SDRPLAY_API_VERSION                   (float)(3.08)
+
+// API Constants
+#define SDRPLAY_MAX_DEVICES                   (16)
+#define SDRPLAY_MAX_TUNERS_PER_DEVICE         (2)
+
+#define SDRPLAY_MAX_SER_NO_LEN                (64)
+#define SDRPLAY_MAX_ROOT_NM_LEN               (32)
+
+#define SDRPLAY_RSP1_ID                       (1)
+#define SDRPLAY_RSP1A_ID                      (255)
+#define SDRPLAY_RSP2_ID                       (2)
+#define SDRPLAY_RSPduo_ID                     (3)
+#define SDRPLAY_RSPdx_ID                      (4)
+
+// Enum types
+typedef enum
+{
+    sdrplay_api_Success               = 0,
+    sdrplay_api_Fail                  = 1,
+    sdrplay_api_InvalidParam          = 2,
+    sdrplay_api_OutOfRange            = 3,
+    sdrplay_api_GainUpdateError       = 4,
+    sdrplay_api_RfUpdateError         = 5,
+    sdrplay_api_FsUpdateError         = 6,
+    sdrplay_api_HwError               = 7,
+    sdrplay_api_AliasingError         = 8,
+    sdrplay_api_AlreadyInitialised    = 9,
+    sdrplay_api_NotInitialised        = 10,
+    sdrplay_api_NotEnabled            = 11,
+    sdrplay_api_HwVerError            = 12,
+    sdrplay_api_OutOfMemError         = 13,
+    sdrplay_api_ServiceNotResponding  = 14,
+    sdrplay_api_StartPending          = 15,
+    sdrplay_api_StopPending           = 16,
+    sdrplay_api_InvalidMode           = 17,
+    sdrplay_api_FailedVerification1   = 18,
+    sdrplay_api_FailedVerification2   = 19,
+    sdrplay_api_FailedVerification3   = 20,
+    sdrplay_api_FailedVerification4   = 21,
+    sdrplay_api_FailedVerification5   = 22,
+    sdrplay_api_FailedVerification6   = 23,
+    sdrplay_api_InvalidServiceVersion = 24
+} sdrplay_api_ErrT;
+
+typedef enum
+{
+    sdrplay_api_Update_None                        = 0x00000000,
+
+    // Reasons for master only mode 
+    sdrplay_api_Update_Dev_Fs                      = 0x00000001,
+    sdrplay_api_Update_Dev_Ppm                     = 0x00000002,
+    sdrplay_api_Update_Dev_SyncUpdate              = 0x00000004,
+    sdrplay_api_Update_Dev_ResetFlags              = 0x00000008,
+
+    sdrplay_api_Update_Rsp1a_BiasTControl          = 0x00000010,
+    sdrplay_api_Update_Rsp1a_RfNotchControl        = 0x00000020,
+    sdrplay_api_Update_Rsp1a_RfDabNotchControl     = 0x00000040,
+
+    sdrplay_api_Update_Rsp2_BiasTControl           = 0x00000080,
+    sdrplay_api_Update_Rsp2_AmPortSelect           = 0x00000100,
+    sdrplay_api_Update_Rsp2_AntennaControl         = 0x00000200,
+    sdrplay_api_Update_Rsp2_RfNotchControl         = 0x00000400,
+    sdrplay_api_Update_Rsp2_ExtRefControl          = 0x00000800,
+
+    sdrplay_api_Update_RspDuo_ExtRefControl        = 0x00001000,
+
+    sdrplay_api_Update_Master_Spare_1              = 0x00002000,
+    sdrplay_api_Update_Master_Spare_2              = 0x00004000,
+
+    // Reasons for master and slave mode
+    // Note: sdrplay_api_Update_Tuner_Gr MUST be the first value defined in this section!
+    sdrplay_api_Update_Tuner_Gr                    = 0x00008000,
+    sdrplay_api_Update_Tuner_GrLimits              = 0x00010000,
+    sdrplay_api_Update_Tuner_Frf                   = 0x00020000,
+    sdrplay_api_Update_Tuner_BwType                = 0x00040000,
+    sdrplay_api_Update_Tuner_IfType                = 0x00080000,
+    sdrplay_api_Update_Tuner_DcOffset              = 0x00100000,
+    sdrplay_api_Update_Tuner_LoMode                = 0x00200000,
+
+    sdrplay_api_Update_Ctrl_DCoffsetIQimbalance    = 0x00400000,
+    sdrplay_api_Update_Ctrl_Decimation             = 0x00800000,
+    sdrplay_api_Update_Ctrl_Agc                    = 0x01000000,
+    sdrplay_api_Update_Ctrl_AdsbMode               = 0x02000000,
+    sdrplay_api_Update_Ctrl_OverloadMsgAck         = 0x04000000,
+
+    sdrplay_api_Update_RspDuo_BiasTControl         = 0x08000000,
+    sdrplay_api_Update_RspDuo_AmPortSelect         = 0x10000000,
+    sdrplay_api_Update_RspDuo_Tuner1AmNotchControl = 0x20000000,
+    sdrplay_api_Update_RspDuo_RfNotchControl       = 0x40000000,
+    sdrplay_api_Update_RspDuo_RfDabNotchControl    = 0x80000000,
+} sdrplay_api_ReasonForUpdateT;
+
+typedef enum
+{
+    sdrplay_api_Update_Ext1_None                   = 0x00000000,
+
+    // Reasons for master only mode 
+    sdrplay_api_Update_RspDx_HdrEnable             = 0x00000001,
+    sdrplay_api_Update_RspDx_BiasTControl          = 0x00000002,
+    sdrplay_api_Update_RspDx_AntennaControl        = 0x00000004,
+    sdrplay_api_Update_RspDx_RfNotchControl        = 0x00000008,
+    sdrplay_api_Update_RspDx_RfDabNotchControl     = 0x00000010,
+    sdrplay_api_Update_RspDx_HdrBw                 = 0x00000020,
+
+    // Reasons for master and slave mode
+} sdrplay_api_ReasonForUpdateExtension1T;
+
+typedef enum
+{
+    sdrplay_api_DbgLvl_Disable       = 0,
+    sdrplay_api_DbgLvl_Verbose       = 1,
+    sdrplay_api_DbgLvl_Warning       = 2,
+    sdrplay_api_DbgLvl_Error         = 3,
+    sdrplay_api_DbgLvl_Message       = 4,
+} sdrplay_api_DbgLvl_t;
+
+// Device structure 
+typedef struct 
+{
+    char SerNo[SDRPLAY_MAX_SER_NO_LEN];
+    unsigned char hwVer;
+    sdrplay_api_TunerSelectT tuner;
+    sdrplay_api_RspDuoModeT rspDuoMode;
+    unsigned char valid;
+    double rspDuoSampleFreq;
+    HANDLE dev;
+} sdrplay_api_DeviceT;
+
+// Device parameter structure
+typedef struct 
+{
+    sdrplay_api_DevParamsT       *devParams;
+    sdrplay_api_RxChannelParamsT *rxChannelA;
+    sdrplay_api_RxChannelParamsT *rxChannelB;
+} sdrplay_api_DeviceParamsT;
+
+// Extended error message structure
+typedef struct 
+{
+    char file[256];
+    char function[256];
+    int  line;
+    char message[1024];
+} sdrplay_api_ErrorInfoT;
+
+// Comman API function types
+typedef sdrplay_api_ErrT        (*sdrplay_api_Open_t)(void);    
+typedef sdrplay_api_ErrT        (*sdrplay_api_Close_t)(void);    
+typedef sdrplay_api_ErrT        (*sdrplay_api_ApiVersion_t)(float *apiVer);    
+typedef sdrplay_api_ErrT        (*sdrplay_api_LockDeviceApi_t)(void);    
+typedef sdrplay_api_ErrT        (*sdrplay_api_UnlockDeviceApi_t)(void);    
+typedef sdrplay_api_ErrT        (*sdrplay_api_GetDevices_t)(sdrplay_api_DeviceT *devices, unsigned int *numDevs, unsigned int maxDevs);    
+typedef sdrplay_api_ErrT        (*sdrplay_api_SelectDevice_t)(sdrplay_api_DeviceT *device);    
+typedef sdrplay_api_ErrT        (*sdrplay_api_ReleaseDevice_t)(sdrplay_api_DeviceT *device);    
+typedef const char*             (*sdrplay_api_GetErrorString_t)(sdrplay_api_ErrT err);
+typedef sdrplay_api_ErrorInfoT* (*sdrplay_api_GetLastError_t)(sdrplay_api_DeviceT *device);
+typedef sdrplay_api_ErrT        (*sdrplay_api_DisableHeartbeat_t)(void);
+
+// Device API function types
+typedef sdrplay_api_ErrT        (*sdrplay_api_DebugEnable_t)(HANDLE dev, sdrplay_api_DbgLvl_t dbgLvl); 
+typedef sdrplay_api_ErrT        (*sdrplay_api_GetDeviceParams_t)(HANDLE dev, sdrplay_api_DeviceParamsT **deviceParams); 
+typedef sdrplay_api_ErrT        (*sdrplay_api_Init_t)(HANDLE dev, sdrplay_api_CallbackFnsT *callbackFns, void *cbContext); 
+typedef sdrplay_api_ErrT        (*sdrplay_api_Uninit_t)(HANDLE dev);
+typedef sdrplay_api_ErrT        (*sdrplay_api_Update_t)(HANDLE dev, sdrplay_api_TunerSelectT tuner, sdrplay_api_ReasonForUpdateT reasonForUpdate, sdrplay_api_ReasonForUpdateExtension1T reasonForUpdateExt1);
+typedef sdrplay_api_ErrT        (*sdrplay_api_SwapRspDuoActiveTuner_t)(HANDLE dev, sdrplay_api_TunerSelectT *tuner, sdrplay_api_RspDuo_AmPortSelectT tuner1AmPortSel);
+typedef sdrplay_api_ErrT        (*sdrplay_api_SwapRspDuoDualTunerModeSampleRate_t)(double *currentSampleRate, double newSampleRate);
+typedef sdrplay_api_ErrT        (*sdrplay_api_SwapRspDuoMode_t)(sdrplay_api_DeviceT *currDevice, sdrplay_api_DeviceParamsT **deviceParams,
+                                                                sdrplay_api_RspDuoModeT rspDuoMode, double sampleRate, sdrplay_api_TunerSelectT tuner,
+                                                                sdrplay_api_Bw_MHzT bwType, sdrplay_api_If_kHzT ifType, sdrplay_api_RspDuo_AmPortSelectT tuner1AmPortSel);
+
+// API function definitions
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+//    // Comman API function definitions
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_Open(void);
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_Close(void);
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_ApiVersion(float *apiVer);
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_LockDeviceApi(void);
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_UnlockDeviceApi(void);
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_GetDevices(sdrplay_api_DeviceT *devices, unsigned int *numDevs, unsigned int maxDevs);
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_SelectDevice(sdrplay_api_DeviceT *device);
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_ReleaseDevice(sdrplay_api_DeviceT *device);
+//    _SDRPLAY_DLL_QUALIFIER const char*             sdrplay_api_GetErrorString(sdrplay_api_ErrT err);
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrorInfoT* sdrplay_api_GetLastError(sdrplay_api_DeviceT *device);
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_DisableHeartbeat(void); // Must be called before sdrplay_api_SelectDevice()
+//
+//    // Device API function definitions
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_DebugEnable(HANDLE dev, sdrplay_api_DbgLvl_t enable);
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_GetDeviceParams(HANDLE dev, sdrplay_api_DeviceParamsT **deviceParams);
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_Init(HANDLE dev, sdrplay_api_CallbackFnsT *callbackFns, void *cbContext);
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_Uninit(HANDLE dev);
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_Update(HANDLE dev, sdrplay_api_TunerSelectT tuner, sdrplay_api_ReasonForUpdateT reasonForUpdate, sdrplay_api_ReasonForUpdateExtension1T reasonForUpdateExt1);
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_SwapRspDuoActiveTuner(HANDLE dev, sdrplay_api_TunerSelectT *currentTuner, sdrplay_api_RspDuo_AmPortSelectT tuner1AmPortSel);
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_SwapRspDuoDualTunerModeSampleRate(HANDLE dev, double *currentSampleRate, double newSampleRate);
+//    _SDRPLAY_DLL_QUALIFIER sdrplay_api_ErrT        sdrplay_api_SwapRspDuoMode(sdrplay_api_DeviceT *currDevice, sdrplay_api_DeviceParamsT **deviceParams,
+//                                                                              sdrplay_api_RspDuoModeT rspDuoMode, double sampleRate, sdrplay_api_TunerSelectT tuner,
+//                                                                              sdrplay_api_Bw_MHzT bwType, sdrplay_api_If_kHzT ifType, sdrplay_api_RspDuo_AmPortSelectT tuner1AmPortSel);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif //SDRPLAY_API_H

artifacts/sdrplay-api-headers/v3_08/sdrplay_api_callback.h

@@ -0,0 +1,78 @@
+#ifndef SDRPLAY_API_CALLBACK_H
+#define SDRPLAY_API_CALLBACK_H
+
+// Event callback enums
+typedef enum
+{
+    sdrplay_api_Overload_Detected     = 0,
+    sdrplay_api_Overload_Corrected    = 1,
+} sdrplay_api_PowerOverloadCbEventIdT;
+
+typedef enum
+{
+    sdrplay_api_MasterInitialised      = 0,
+    sdrplay_api_SlaveAttached          = 1,
+    sdrplay_api_SlaveDetached          = 2,
+    sdrplay_api_SlaveInitialised       = 3,
+    sdrplay_api_SlaveUninitialised     = 4,
+    sdrplay_api_MasterDllDisappeared   = 5,
+    sdrplay_api_SlaveDllDisappeared    = 6,
+} sdrplay_api_RspDuoModeCbEventIdT;
+
+typedef enum
+{
+    sdrplay_api_GainChange            = 0,
+    sdrplay_api_PowerOverloadChange   = 1,
+    sdrplay_api_DeviceRemoved         = 2,
+    sdrplay_api_RspDuoModeChange      = 3,
+} sdrplay_api_EventT;
+
+// Event callback parameter structs
+typedef struct 
+{
+    unsigned int gRdB;
+    unsigned int lnaGRdB;
+    double currGain;
+} sdrplay_api_GainCbParamT;
+
+typedef struct 
+{
+    sdrplay_api_PowerOverloadCbEventIdT powerOverloadChangeType;
+} sdrplay_api_PowerOverloadCbParamT;
+
+typedef struct 
+{
+    sdrplay_api_RspDuoModeCbEventIdT modeChangeType;
+} sdrplay_api_RspDuoModeCbParamT;
+
+// Event parameters overlay
+typedef union
+{
+    sdrplay_api_GainCbParamT          gainParams;
+    sdrplay_api_PowerOverloadCbParamT powerOverloadParams;
+    sdrplay_api_RspDuoModeCbParamT    rspDuoModeParams;
+} sdrplay_api_EventParamsT;
+
+// Stream callback parameter structs
+typedef struct 
+{
+    unsigned int firstSampleNum;
+    int grChanged;
+    int rfChanged;
+    int fsChanged;
+    unsigned int numSamples;
+} sdrplay_api_StreamCbParamsT;
+
+// Callback function prototypes
+typedef void (*sdrplay_api_StreamCallback_t)(short *xi, short *xq, sdrplay_api_StreamCbParamsT *params, unsigned int numSamples, unsigned int reset, void *cbContext); 
+typedef void (*sdrplay_api_EventCallback_t)(sdrplay_api_EventT eventId, sdrplay_api_TunerSelectT tuner, sdrplay_api_EventParamsT *params, void *cbContext); 
+
+// Callback function struct
+typedef struct 
+{
+    sdrplay_api_StreamCallback_t StreamACbFn;
+    sdrplay_api_StreamCallback_t StreamBCbFn;
+    sdrplay_api_EventCallback_t  EventCbFn;
+} sdrplay_api_CallbackFnsT;
+
+#endif //SDRPLAY_API_CALLBACK_H

artifacts/sdrplay-api-headers/v3_08/sdrplay_api_control.h

@@ -0,0 +1,55 @@
+#ifndef SDRPLAY_API_CONTROL_H
+#define SDRPLAY_API_CONTROL_H
+
+// Control parameter enums
+typedef enum
+{
+    sdrplay_api_AGC_DISABLE  = 0,
+    sdrplay_api_AGC_100HZ    = 1,
+    sdrplay_api_AGC_50HZ     = 2,
+    sdrplay_api_AGC_5HZ      = 3,
+    sdrplay_api_AGC_CTRL_EN  = 4
+} sdrplay_api_AgcControlT;
+
+typedef enum
+{
+    sdrplay_api_ADSB_DECIMATION                  = 0,
+    sdrplay_api_ADSB_NO_DECIMATION_LOWPASS       = 1,
+    sdrplay_api_ADSB_NO_DECIMATION_BANDPASS_2MHZ = 2,
+    sdrplay_api_ADSB_NO_DECIMATION_BANDPASS_3MHZ = 3
+} sdrplay_api_AdsbModeT;
+
+// Control parameter structs
+typedef struct 
+{
+    unsigned char DCenable;          // default: 1
+    unsigned char IQenable;          // default: 1
+} sdrplay_api_DcOffsetT;
+
+typedef struct 
+{
+    unsigned char enable;            // default: 0
+    unsigned char decimationFactor;  // default: 1
+    unsigned char wideBandSignal;    // default: 0
+} sdrplay_api_DecimationT;
+
+typedef struct 
+{
+    sdrplay_api_AgcControlT enable;    // default: sdrplay_api_AGC_50HZ
+    int setPoint_dBfs;                 // default: -60
+    unsigned short attack_ms;          // default: 0
+    unsigned short decay_ms;           // default: 0
+    unsigned short decay_delay_ms;     // default: 0
+    unsigned short decay_threshold_dB; // default: 0
+    int syncUpdate;                    // default: 0
+} sdrplay_api_AgcT;
+
+typedef struct 
+{
+    sdrplay_api_DcOffsetT dcOffset;
+    sdrplay_api_DecimationT decimation;
+    sdrplay_api_AgcT agc;
+    sdrplay_api_AdsbModeT adsbMode;  //default: sdrplay_api_ADSB_DECIMATION
+} sdrplay_api_ControlParamsT;
+
+#endif //SDRPLAY_API_CONTROL_H

artifacts/sdrplay-api-headers/v3_08/sdrplay_api_dev.h

@@ -0,0 +1,51 @@
+#ifndef SDRPLAY_API_DEV_H
+#define SDRPLAY_API_DEV_H
+
+#include "sdrplay_api_rsp1a.h"
+#include "sdrplay_api_rsp2.h"
+#include "sdrplay_api_rspDuo.h"
+#include "sdrplay_api_rspDx.h"
+
+// Dev parameter enums
+typedef enum
+{
+    sdrplay_api_ISOCH = 0,
+    sdrplay_api_BULK  = 1
+} sdrplay_api_TransferModeT;
+
+// Dev parameter structs
+typedef struct 
+{
+    double fsHz;                        // default: 2000000.0
+    unsigned char syncUpdate;           // default: 0
+    unsigned char reCal;                // default: 0
+} sdrplay_api_FsFreqT;
+
+typedef struct 
+{
+    unsigned int sampleNum;             // default: 0
+    unsigned int period;                // default: 0
+} sdrplay_api_SyncUpdateT;
+
+typedef struct 
+{
+    unsigned char resetGainUpdate;      // default: 0
+    unsigned char resetRfUpdate;        // default: 0
+    unsigned char resetFsUpdate;        // default: 0
+} sdrplay_api_ResetFlagsT;   
+
+typedef struct 
+{
+    double ppm;                         // default: 0.0
+    sdrplay_api_FsFreqT fsFreq;
+    sdrplay_api_SyncUpdateT syncUpdate; 
+    sdrplay_api_ResetFlagsT resetFlags; 
+    sdrplay_api_TransferModeT mode;     // default: sdrplay_api_ISOCH
+    unsigned int samplesPerPkt;         // default: 0 (output param)
+    sdrplay_api_Rsp1aParamsT rsp1aParams;
+    sdrplay_api_Rsp2ParamsT rsp2Params;
+    sdrplay_api_RspDuoParamsT rspDuoParams;
+    sdrplay_api_RspDxParamsT rspDxParams;
+} sdrplay_api_DevParamsT;
+
+#endif //SDRPLAY_API_DEV_H

artifacts/sdrplay-api-headers/v3_08/sdrplay_api_rsp1a.h

@@ -0,0 +1,22 @@
+#ifndef SDRPLAY_API_RSP1A_H
+#define SDRPLAY_API_RSP1A_H
+
+#define RSPIA_NUM_LNA_STATES         10
+#define RSPIA_NUM_LNA_STATES_AM      7
+#define RSPIA_NUM_LNA_STATES_LBAND   9
+
+// RSP1A parameter enums
+
+// RSP1A parameter structs
+typedef struct 
+{
+    unsigned char rfNotchEnable;                              // default: 0
+    unsigned char rfDabNotchEnable;                           // default: 0
+} sdrplay_api_Rsp1aParamsT;
+
+typedef struct 
+{
+    unsigned char biasTEnable;                   // default: 0
+} sdrplay_api_Rsp1aTunerParamsT;
+
+#endif //SDRPLAY_API_RSP1A_H

artifacts/sdrplay-api-headers/v3_08/sdrplay_api_rsp2.h

@@ -0,0 +1,35 @@
+#ifndef SDRPLAY_API_RSP2_H
+#define SDRPLAY_API_RSP2_H
+
+#define RSPII_NUM_LNA_STATES         9
+#define RSPII_NUM_LNA_STATES_AMPORT  5
+#define RSPII_NUM_LNA_STATES_420MHZ  6
+
+// RSP2 parameter enums
+typedef enum
+{
+    sdrplay_api_Rsp2_ANTENNA_A = 5,
+    sdrplay_api_Rsp2_ANTENNA_B = 6,
+} sdrplay_api_Rsp2_AntennaSelectT;
+
+typedef enum
+{
+    sdrplay_api_Rsp2_AMPORT_1 = 1,
+    sdrplay_api_Rsp2_AMPORT_2 = 0,
+} sdrplay_api_Rsp2_AmPortSelectT;
+
+// RSP2 parameter structs
+typedef struct 
+{
+    unsigned char extRefOutputEn;                // default: 0
+} sdrplay_api_Rsp2ParamsT;
+
+typedef struct 
+{
+    unsigned char biasTEnable;                   // default: 0
+    sdrplay_api_Rsp2_AmPortSelectT amPortSel;    // default: sdrplay_api_Rsp2_AMPORT_2
+    sdrplay_api_Rsp2_AntennaSelectT antennaSel;  // default: sdrplay_api_Rsp2_ANTENNA_A
+    unsigned char rfNotchEnable;                 // default: 0
+} sdrplay_api_Rsp2TunerParamsT;
+
+#endif //SDRPLAY_API_RSP2_H

artifacts/sdrplay-api-headers/v3_08/sdrplay_api_rspDuo.h

@@ -0,0 +1,40 @@
+#ifndef SDRPLAY_API_RSPduo_H
+#define SDRPLAY_API_RSPduo_H
+
+#define RSPDUO_NUM_LNA_STATES         10
+#define RSPDUO_NUM_LNA_STATES_AMPORT  5
+#define RSPDUO_NUM_LNA_STATES_AM      7
+#define RSPDUO_NUM_LNA_STATES_LBAND   9
+
+// RSPduo parameter enums
+typedef enum
+{
+    sdrplay_api_RspDuoMode_Unknown      = 0,
+    sdrplay_api_RspDuoMode_Single_Tuner = 1,
+    sdrplay_api_RspDuoMode_Dual_Tuner   = 2,
+    sdrplay_api_RspDuoMode_Master       = 4,
+    sdrplay_api_RspDuoMode_Slave        = 8,
+} sdrplay_api_RspDuoModeT;
+
+typedef enum
+{
+    sdrplay_api_RspDuo_AMPORT_1 = 1,
+    sdrplay_api_RspDuo_AMPORT_2 = 0,
+} sdrplay_api_RspDuo_AmPortSelectT;
+
+// RSPduo parameter structs
+typedef struct 
+{
+    int extRefOutputEn;                             // default: 0
+} sdrplay_api_RspDuoParamsT;
+
+typedef struct 
+{
+    unsigned char biasTEnable;                      // default: 0
+    sdrplay_api_RspDuo_AmPortSelectT tuner1AmPortSel; // default: sdrplay_api_RspDuo_AMPORT_2
+    unsigned char tuner1AmNotchEnable;              // default: 0
+    unsigned char rfNotchEnable;                    // default: 0
+    unsigned char rfDabNotchEnable;                 // default: 0
+} sdrplay_api_RspDuoTunerParamsT;
+
+#endif //SDRPLAY_API_RSPduo_H

artifacts/sdrplay-api-headers/v3_08/sdrplay_api_rspDx.h

@@ -0,0 +1,45 @@
+#ifndef SDRPLAY_API_RSPDX_H
+#define SDRPLAY_API_RSPDX_H
+
+#include "sdrplay_api_tuner.h"
+
+#define RSPDX_NUM_LNA_STATES               28   // Number of LNA states in all bands (except where defined differently below)
+#define RSPDX_NUM_LNA_STATES_AMPORT2_0_12  19   // Number of LNA states when using AM Port 2 between 0 and 12MHz
+#define RSPDX_NUM_LNA_STATES_AMPORT2_12_60 20   // Number of LNA states when using AM Port 2 between 12 and 60MHz
+#define RSPDX_NUM_LNA_STATES_VHF_BAND3     27   // Number of LNA states in VHF and Band3
+#define RSPDX_NUM_LNA_STATES_420MHZ        21   // Number of LNA states in 420MHz band
+#define RSPDX_NUM_LNA_STATES_LBAND         19   // Number of LNA states in L-band
+#define RSPDX_NUM_LNA_STATES_DX            26   // Number of LNA states in DX path
+
+// RSPdx parameter enums
+typedef enum
+{
+    sdrplay_api_RspDx_ANTENNA_A = 0,
+    sdrplay_api_RspDx_ANTENNA_B = 1,
+    sdrplay_api_RspDx_ANTENNA_C = 2,
+} sdrplay_api_RspDx_AntennaSelectT;
+
+typedef enum
+{
+    sdrplay_api_RspDx_HDRMODE_BW_0_200  = 0,
+    sdrplay_api_RspDx_HDRMODE_BW_0_500  = 1,
+    sdrplay_api_RspDx_HDRMODE_BW_1_200  = 2,
+    sdrplay_api_RspDx_HDRMODE_BW_1_700  = 3,
+} sdrplay_api_RspDx_HdrModeBwT;
+
+// RSPdx parameter structs
+typedef struct 
+{
+    unsigned char hdrEnable;                            // default: 0
+    unsigned char biasTEnable;                          // default: 0
+    sdrplay_api_RspDx_AntennaSelectT antennaSel;        // default: sdrplay_api_RspDx_ANTENNA_A
+    unsigned char rfNotchEnable;                        // default: 0
+    unsigned char rfDabNotchEnable;                     // default: 0
+} sdrplay_api_RspDxParamsT;
+
+typedef struct 
+{
+    sdrplay_api_RspDx_HdrModeBwT hdrBw;                 // default: sdrplay_api_RspDx_HDRMODE_BW_1_700
+} sdrplay_api_RspDxTunerParamsT;
+
+#endif //SDRPLAY_API_RSPDX_H

artifacts/sdrplay-api-headers/v3_08/sdrplay_api_rx_channel.h

@@ -0,0 +1,21 @@
+#ifndef SDRPLAY_API_RX_CHANNEL_H
+#define SDRPLAY_API_RX_CHANNEL_H
+
+#include "sdrplay_api_tuner.h"
+#include "sdrplay_api_control.h"
+#include "sdrplay_api_rsp1a.h"
+#include "sdrplay_api_rsp2.h"
+#include "sdrplay_api_rspDuo.h"
+#include "sdrplay_api_rspDx.h"
+
+typedef struct 
+{
+    sdrplay_api_TunerParamsT        tunerParams;    
+    sdrplay_api_ControlParamsT      ctrlParams;     
+    sdrplay_api_Rsp1aTunerParamsT   rsp1aTunerParams; 
+    sdrplay_api_Rsp2TunerParamsT    rsp2TunerParams; 
+    sdrplay_api_RspDuoTunerParamsT  rspDuoTunerParams;    
+    sdrplay_api_RspDxTunerParamsT   rspDxTunerParams;    
+} sdrplay_api_RxChannelParamsT;
+
+#endif //SDRPLAY_API_RX_CHANNEL_H

artifacts/sdrplay-api-headers/v3_08/sdrplay_api_tuner.h

@@ -0,0 +1,93 @@
+#ifndef SDRPLAY_API_TUNER_H
+#define SDRPLAY_API_TUNER_H
+
+#define MAX_BB_GR                         (59)
+
+// Tuner parameter enums
+typedef enum
+{
+    sdrplay_api_BW_Undefined = 0,
+    sdrplay_api_BW_0_200     = 200,
+    sdrplay_api_BW_0_300     = 300,
+    sdrplay_api_BW_0_600     = 600,
+    sdrplay_api_BW_1_536     = 1536,
+    sdrplay_api_BW_5_000     = 5000,
+    sdrplay_api_BW_6_000     = 6000,
+    sdrplay_api_BW_7_000     = 7000,
+    sdrplay_api_BW_8_000     = 8000
+} sdrplay_api_Bw_MHzT;
+
+typedef enum
+{
+    sdrplay_api_IF_Undefined = -1,
+    sdrplay_api_IF_Zero      = 0,
+    sdrplay_api_IF_0_450     = 450,
+    sdrplay_api_IF_1_620     = 1620,
+    sdrplay_api_IF_2_048     = 2048
+} sdrplay_api_If_kHzT;
+
+typedef enum
+{
+    sdrplay_api_LO_Undefined = 0,
+    sdrplay_api_LO_Auto      = 1,
+    sdrplay_api_LO_120MHz    = 2,
+    sdrplay_api_LO_144MHz    = 3,
+    sdrplay_api_LO_168MHz    = 4
+} sdrplay_api_LoModeT;
+
+typedef enum
+{
+    sdrplay_api_EXTENDED_MIN_GR = 0,
+    sdrplay_api_NORMAL_MIN_GR   = 20
+} sdrplay_api_MinGainReductionT;
+
+typedef enum
+{
+    sdrplay_api_Tuner_Neither  = 0,
+    sdrplay_api_Tuner_A        = 1,
+    sdrplay_api_Tuner_B        = 2,
+    sdrplay_api_Tuner_Both     = 3,
+} sdrplay_api_TunerSelectT;
+
+// Tuner parameter structs
+typedef struct
+{
+    float curr;
+    float max;
+    float min;
+} sdrplay_api_GainValuesT;
+
+typedef struct 
+{
+    int gRdB;                            // default: 50
+    unsigned char LNAstate;              // default: 0
+    unsigned char syncUpdate;            // default: 0
+    sdrplay_api_MinGainReductionT minGr; // default: sdrplay_api_NORMAL_MIN_GR
+    sdrplay_api_GainValuesT gainVals;    // output parameter
+} sdrplay_api_GainT;
+
+typedef struct 
+{
+    double rfHz;                         // default: 200000000.0
+    unsigned char syncUpdate;            // default: 0
+} sdrplay_api_RfFreqT;
+
+typedef struct 
+{
+    unsigned char dcCal;                 // default: 3 (Periodic mode)
+    unsigned char speedUp;               // default: 0 (No speedup)
+    int trackTime;                       // default: 1    (=> time in uSec = (72 * 3 * trackTime) / 24e6       = 9uSec)
+    int refreshRateTime;                 // default: 2048 (=> time in uSec = (72 * 3 * refreshRateTime) / 24e6 = 18432uSec)
+} sdrplay_api_DcOffsetTunerT;
+
+typedef struct 
+{
+    sdrplay_api_Bw_MHzT bwType;          // default: sdrplay_api_BW_0_200
+    sdrplay_api_If_kHzT ifType;          // default: sdrplay_api_IF_Zero
+    sdrplay_api_LoModeT loMode;          // default: sdrplay_api_LO_Auto
+    sdrplay_api_GainT gain;
+    sdrplay_api_RfFreqT rfFreq;
+    sdrplay_api_DcOffsetTunerT dcOffsetTuner;
+} sdrplay_api_TunerParamsT;
+
+#endif //SDRPLAY_API_TUNER_H

build.gradle

@@ -2,7 +2,7 @@ import java.text.SimpleDateFormat
 
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -18,6 +18,29 @@ import java.text.SimpleDateFormat
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  * ****************************************************************************
  */
+
+/**
+ * Instructions for building/compiling the sdrtrunk application.
+ *
+ * Prerequisites:
+ * Install and configure an OpenJDK version 19+ that includes the JavaFX modules (e.g. Bellsoft Liberica JDK)
+ * - Optional: install and configure Gradle 7.6+
+ *
+ * Scenario 1: run the application via gradle command line from the source code root directory:
+ * command: ./gradlew run
+ *
+ * Scenario 2: create an application release for the current operating system
+ * command: ./gradlew runtimeZipCurrent
+ * Note: release image is located in the /build/image/ directory
+ *
+ * Scenario 3: create releases for Linux and OSX operating systems using downloaded JDKs
+ * command: ./gradlew runtimeZipOthers
+ * Note: release images are located in the /build/image/ directory
+ *
+ * Scenario 4: create release for Windows operating system using downloaded JDK
+ * command: ./gradlew runtimeZipWindows
+ * Note: release image is located in the /build/image/ directory
+ */
 plugins {
     id 'application'
     id 'java'
@@ -30,12 +53,13 @@ repositories {
     maven { url "https://jitpack.io" }
 }
 
-version = '0.6.0-alpha2'
+//Version is defined in gradle.properties so that we can CLI override it for nightly builds.
+version = project.findProperty('projectVersion')
 
-//Java 19 is required for this version of the Project Panama preview/incubator feature
+//Java 20 is required for this version of the Project Panama preview/incubator feature
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(19)
+        languageVersion = JavaLanguageVersion.of(20)
     }
 }
 
@@ -98,6 +122,8 @@ dependencies {
     implementation 'pl.edu.icm:JLargeArrays:1.6'
 }
 
+def os = org.gradle.nativeplatform.platform.internal.DefaultNativePlatform.currentOperatingSystem
+
 /**
  * This is needed for the JDK19 panama and vector API ... until it moves out of incubation or preview
  */
@@ -106,24 +132,35 @@ tasks.withType(JavaCompile) {
     options.compilerArgs.add("--add-modules=jdk.incubator.vector") //Needed while Panama Vector API remains in incubator
 }
 
-application {
-    mainClassName = "io.github.dsheirer.gui.SDRTrunk"
-    applicationDefaultJvmArgs =
+/**
+ * JVM Arguments for running the application on Windows.
+ */
+def jvmArgsWindows =
+        ['--add-exports=javafx.base/com.sun.javafx.event=ALL-UNNAMED', //Needed for controls-fx.jar
+         '--add-exports=java.desktop/com.sun.java.swing.plaf.windows=ALL-UNNAMED', //windows users for JIDE
+         '--add-modules=jdk.incubator.vector',   //Needed while Project Panama API is still in incubator
+         '--enable-preview', //Project Panama Vector & Foreign Function APIs remain in incubator
+         '--enable-native-access=ALL-UNNAMED',
+         '-Djava.library.path=c:\\Program Files\\SDRplay\\API\\x64'] //Allows Project Panama Foreign Function access to system library
+
+/**
+ * JVM Arguments for running the application on Linux.
+ */
+def jvmArgsLinux =
         ['--add-exports=javafx.base/com.sun.javafx.event=ALL-UNNAMED', //Needed for controls-fx.jar
          '--add-modules=jdk.incubator.vector',   //Needed while Project Panama API is still in incubator
          '--enable-preview', //Project Panama Vector & Foreign Function APIs remain in incubator
-         '--enable-native-access=ALL-UNNAMED'] //Allows Project Panama Foreign Function access to system library
+         '--enable-native-access=ALL-UNNAMED',
+         '-Djava.library.path=/usr/local/lib'] //Allows Project Panama Foreign Function access to system library
+
+application {
+    mainClassName = "io.github.dsheirer.gui.SDRTrunk"
 
-    OperatingSystem os = org.gradle.nativeplatform.platform.internal.DefaultNativePlatform.currentOperatingSystem;
     if(os.isWindows()) {
-        //Replace the default Java system library path with an explicit location for the SDRplay API library (Windows)
-        applicationDefaultJvmArgs.add('-Djava.library.path=c:\\Program Files\\SDRplay\\API\\x64')
-        //On windows, we also need to export the windows swing look & feel module
-        applicationDefaultJvmArgs.add('--add-exports=java.desktop/com.sun.java.swing.plaf.windows=ALL-UNNAMED')
+        applicationDefaultJvmArgs = jvmArgsWindows
     }
     else {
-        //Replace the default Java system library path with an explicit location for the SDRplay API library (Linux/OS-X)
-        applicationDefaultJvmArgs.add("-Djava.library.path=/usr/local/lib")
+        applicationDefaultJvmArgs = jvmArgsLinux
     }
 }
 
@@ -161,91 +198,158 @@ String targetWindowsX86_64 = 'windows-x86_64-v' + version
  * author's development environment, but can be changed to your environment if you want to use this build pattern.
  */
 String jdk_base = '/home/denny/java_jdks/'
-String jdk_linux_aarch64 = jdk_base + 'linux-arm64/jdk-19.0.1-full'
-String jdk_linux_x86_64 = jdk_base + 'linux-x64/jdk-19.0.1-full'
-String jdk_osx_x86_64 = jdk_base + 'osx-x64/jdk-19.0.1-full.jdk'
-String jdk_osx_aarch64 = jdk_base + 'osx-arm64/jdk-19.0.1-full.jdk'
-String jdk_windows_x86_64 = jdk_base + 'windows-x64/jdk-19.0.1-full'
-
-boolean hasTargetJdks = file(jdk_linux_x86_64).exists() || file(jdk_linux_aarch64).exists() ||
-        file(jdk_osx_x86_64).exists() || file(jdk_osx_aarch64).exists() || file(jdk_windows_x86_64).exists()
+String jdk_linux_aarch64 = jdk_base + 'linux-arm64/jdk-20.0.1-full'
+String jdk_linux_x86_64 = jdk_base + 'linux-x64/jdk-20.0.1-full'
+String jdk_osx_x86_64 = jdk_base + 'osx-x64/jdk-20.0.1-full.jdk'
+String jdk_osx_aarch64 = jdk_base + 'osx-arm64/jdk-20.0.1-full.jdk'
+String jdk_windows_x86_64 = jdk_base + 'windows-x64/jdk-20.0.1-full'
 
 /**
- * Auto-download target JDKs.  Defaults to false, or the user can override via the gradle command line by
- * including this option: '-PdownloadJdks=true'
+ * Download URLs to download the JDK as part of the gradle build packaging process
  */
-boolean downloadJdks = project.hasProperty('downloadJdks') ? project.getProperty('downloadJdks') : false
+def jdk_download_base = "https://download.bell-sw.com/java/20.0.1+10/bellsoft-jdk20.0.1+10-"
+def jdk_download_suffix = "-full.tar.gz"
+def jdk_download_linux_aarch64 = jdk_download_base + "linux-aarch64" + jdk_download_suffix
+def jdk_download_linux_x86_64 = jdk_download_base + "linux-amd64" + jdk_download_suffix
+def jdk_download_osx_x86_64 = jdk_download_base + "macos-amd64" + jdk_download_suffix
+def jdk_download_osx_aarch64 = jdk_download_base + "macos-aarch64" + jdk_download_suffix
+def jdk_download_windows_x86_64 = jdk_download_base + "windows-amd64-full.zip"
 
 /**
- * Beryx Runtime plugin for creating OS and CPU targeted build(s) of the software.
- *
- * Option 1: Create a single target build using the locally installed JDK, or optionally create target builds for
- * all OS and CPU targets when pre-downloaded target JDKs are available (see 'jdk_*' properties above).
- *
- *    >: gradle runtimeZip
- *
- * Option 2: Create all OS and CPU target builds by automatically downloading all JDKs needed to build the target images
- *
- *    >: gradle runtimeZip -PdownloadJdks=true
+ * Configures the runtime zip task with additional options/settings.
+ * @param rt task to configure
+ * @param jvmArgs to use (windows or linux)
+ * @return configured task.
  */
-runtime {
-    //Build by automatically downloading JDKs for the OS and CPU targets
-    if(downloadJdks) {
-        println("Building all runtime images")
-        println("The [ > jre: ] build phase downloads several target JDKs and this may take a while ... please wait")
-        targetPlatform(targetLinuxAarch64) {
-            jdkHome = jdkDownload("https://download.bell-sw.com/java/19.0.1+11/bellsoft-jdk19.0.1+11-linux-aarch64-full.tar.gz")
-        }
-        targetPlatform(targetLinuxX86_64) {
-            jdkHome = jdkDownload("https://download.bell-sw.com/java/19.0.1+11/bellsoft-jdk19.0.1+11-linux-amd64-full.tar.gz")
-        }
-        targetPlatform(targetOsxAarch64) {
-            jdkHome = jdkDownload("https://download.bell-sw.com/java/19.0.1+11/bellsoft-jdk19.0.1+11-macos-aarch64-full.tar.gz")
-        }
-        targetPlatform(targetOsxX86_64) {
-            jdkHome = jdkDownload("https://download.bell-sw.com/java/19.0.1+11/bellsoft-jdk19.0.1+11-macos-amd64-full.tar.gz")
-        }
-        targetPlatform(targetWindowsX86_64) {
-            jdkHome = jdkDownload("https://download.bell-sw.com/java/19.0.1+11/bellsoft-jdk19.0.1+11-windows-amd64-full.zip")
-        }
-    }
-    //Build using pre-downloaded JDKs
-    else if(hasTargetJdks) {
-        println("Building all runtime images using pre-downloaded JDKs")
-        if(file(jdk_linux_aarch64).exists()) {
-            targetPlatform(targetLinuxAarch64, jdk_linux_aarch64)
-        }
-        if(file(jdk_linux_x86_64).exists()) {
-            targetPlatform(targetLinuxX86_64, jdk_linux_x86_64)
-        }
-        if(file(jdk_osx_aarch64).exists()) {
-            targetPlatform(targetOsxAarch64, jdk_osx_aarch64)
-        }
-        if(file(jdk_osx_x86_64).exists()) {
-            targetPlatform(targetOsxX86_64, jdk_osx_x86_64)
-        }
-        if(file(jdk_windows_x86_64).exists()) {
-            targetPlatform(targetWindowsX86_64, jdk_windows_x86_64)
-        }
-    }
-    //Build using locally installed JDK only
-    else {
-        println("Building a single runtime image using locally installed JDK")
-    }
+def configure(org.beryx.runtime.RuntimeZipTask rt, List<String> jvmArgs) {
+    //Use the correct set of JVM arguments
+    rt.extension.launcherData.get().jvmArgs = jvmArgs
 
     //Additional modules to include with auto-detected modules.
     //jdk.crypto.ec - needed for HTTPS connections (broadcastify calls & map tile server)
     //jdk.incubator.vector - needed for Project Panama foreign function and vector apis
     //jdk.accessibility is used with assistive technologies like screen readers
-    modules = ['jdk.crypto.ec','jdk.incubator.vector','jdk.accessibility']
+    //java.management for JVM resource monitoring
+    rt.extension.addModules('jdk.crypto.ec', 'jdk.incubator.vector', 'jdk.accessibility', 'java.management')
 
     //Use auto-detected modules and 'add' any specified modules.
-    additive = true
+    rt.extension.additive.set(true)
 
     //Recommended options for reducing/shrinking runtime target image size
-    options = ['--strip-debug', '--compress', '2', '--no-header-files', '--no-man-pages']
+    rt.extension.addOptions('--strip-debug', '--compress', '2', '--no-header-files', '--no-man-pages')
 
     //Runtime images have auto appended version in image zip name.  Override to include version in single target image.
-    imageZip = (hasTargetJdks | downloadJdks) ? file("$buildDir/image/sdr-trunk.zip") :
-            file("$buildDir/image/sdr-trunk-" + version + ".zip")
+    rt.extension.imageZip.set(file("$buildDir/image/sdr-trunk.zip"))
+}
+
+/**
+ * Creates a release package for the current operating system.
+ *
+ * Note: you cannot create both Windows and Linux releases at the same time due to limitations of the Runtime plugin
+ *
+ * Usage: gradle runtimeZipCurrent
+ * Usage: gradlew runtimeZipCurrent   (windows - using gradlew)
+ * Usage: ./gradlew runtimeZipCurrent   (linux - using gradlew)
+ */
+tasks.register('runtimeZipCurrent', org.beryx.runtime.RuntimeZipTask) {rt ->
+    def arch = System.properties.getProperty("os.arch")
+    def javaHome = org.gradle.internal.jvm.Jvm.current().getJavaHome().toString()
+
+    if(os.isWindows()) {
+        rt.extension.targetPlatform(targetWindowsX86_64, javaHome)
+        configure(rt, jvmArgsWindows)
+    }
+    else if(os.isLinux())
+    {
+        if(arch.equals("amd64")) {
+            rt.extension.targetPlatform(targetLinuxX86_64, javaHome)
+        }
+        else if(arch.equals("aarch64")) {
+            rt.extension.targetPlatform(targetLinuxAarch64, javaHome)
+        }
+        configure(rt, jvmArgsLinux)
+    }
+    else if(os.isMacOsX())
+    {
+        if(arch.equals("amd64")) {
+            rt.extension.targetPlatform(targetOsxX86_64, javaHome)
+        }
+        else if(arch.equals("aarch64")) {
+            rt.extension.targetPlatform(targetOsxAarch64, javaHome)
+        }
+        configure(rt, jvmArgsLinux)
+    }
+}
+
+
+/**
+ * Creates a Windows release package.
+ *
+ * Note: you cannot create both Windows and Linux releases at the same time due to limitations of the Runtime plugin
+ *
+ * Usage: gradle runtimeZipWindows
+ * Usage: gradlew runtimeZipWindows   (windows - using gradlew)
+ * Usage: ./gradlew runtimeZipWindows   (linux - using gradlew)
+ */
+tasks.register('runtimeZipWindows', org.beryx.runtime.RuntimeZipTask) {rt ->
+    if(file(jdk_windows_x86_64).exists()) {
+        rt.extension.targetPlatform(targetWindowsX86_64, jdk_windows_x86_64, [])
+    }
+    else {
+        rt.extension.targetPlatform(targetWindowsX86_64) {
+            jdkHome = jdkDownload(jdk_download_windows_x86_64)
+        }
+    }
+
+    configure(rt, jvmArgsWindows)
+}
+
+/**
+ * Creates Linux & OSX release packages.
+ *
+ * Note: you cannot create both Windows and Linux releases at the same time due to limitations of the Runtime plugin
+ *
+ * Usage: gradle runtimeZipOthers
+ * Usage: gradlew runtimeZipOthers   (windows - using gradlew)
+ * Usage: ./gradlew runtimeZipOthers   (linux - using gradlew)
+ */
+tasks.register('runtimeZipOthers', org.beryx.runtime.RuntimeZipTask) {rt ->
+    //Linux aarch64
+    if(file(jdk_linux_aarch64).exists()) {
+        rt.extension.targetPlatform(targetLinuxAarch64, jdk_linux_aarch64, [])
+    }
+    else {
+        rt.extension.targetPlatform(targetLinuxAarch64) {
+            jdkHome = jdkDownload(jdk_download_linux_aarch64)
+        }
+    }
+    //Linux x86-64
+    if(file(jdk_linux_x86_64).exists()) {
+        rt.extension.targetPlatform(targetLinuxX86_64, jdk_linux_x86_64, [])
+    }
+    else {
+        rt.extension.targetPlatform(targetLinuxX86_64) {
+            jdkHome = jdkDownload(jdk_download_linux_x86_64)
+        }
+    }
+    //OSX aarch64
+    if(file(jdk_osx_aarch64).exists()) {
+        rt.extension.targetPlatform(targetOsxAarch64, jdk_osx_aarch64, [])
+    }
+    else {
+        rt.extension.targetPlatform(targetOsxAarch64) {
+            jdkHome = jdkDownload(jdk_download_osx_aarch64)
+        }
+    }
+    //OSX x86-64
+    if(file(jdk_osx_x86_64).exists()) {
+        rt.extension.targetPlatform(targetOsxX86_64, jdk_osx_x86_64, [])
+    }
+    else {
+        rt.extension.targetPlatform(targetOsxX86_64) {
+            jdkHome = jdkDownload(jdk_download_osx_x86_64)
+        }
+    }
+
+    configure(rt, jvmArgsLinux);
 }

gradle.properties

@@ -0,0 +1,31 @@
+#
+# ******************************************************************************
+# Copyright (C) 2014-2023 Dennis Sheirer
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>
+# *****************************************************************************
+#
+
+# Version naming conventions:
+#   Alpha: maj.min.patch-alpha-build
+#    Beta: maj.min.patch-beta-build
+# Release: maj.min.patch
+#
+# Example: 0.6.0-beta-5
+#
+# Note: this is so that the file names for the resultant release build products match the GitLab release asset
+# tag name, specifically the dashes inserted before and after the alpha/beta labels.
+# See: https://github.com/DSheirer/sdrtrunk/issues/1651
+
+projectVersion=0.6.0

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 #
 # ******************************************************************************
-# Copyright (C) 2014-2022 Dennis Sheirer
+# Copyright (C) 2014-2023 Dennis Sheirer
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -19,7 +19,7 @@
 
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.2-bin.zip
 networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

src/main/java/io/github/dsheirer/alias/AliasFactory.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,37 +19,31 @@
 package io.github.dsheirer.alias;
 
 import io.github.dsheirer.alias.action.AliasAction;
-import io.github.dsheirer.alias.action.AliasActionType;
 import io.github.dsheirer.alias.action.beep.BeepAction;
 import io.github.dsheirer.alias.action.clip.ClipAction;
 import io.github.dsheirer.alias.action.script.ScriptAction;
 import io.github.dsheirer.alias.id.AliasID;
-import io.github.dsheirer.alias.id.AliasIDType;
 import io.github.dsheirer.alias.id.broadcast.BroadcastChannel;
+import io.github.dsheirer.alias.id.dcs.Dcs;
 import io.github.dsheirer.alias.id.esn.Esn;
-import io.github.dsheirer.alias.id.legacy.fleetsync.FleetsyncID;
-import io.github.dsheirer.alias.id.legacy.mdc.MDC1200ID;
 import io.github.dsheirer.alias.id.legacy.mobileID.Min;
-import io.github.dsheirer.alias.id.legacy.mpt1327.MPT1327ID;
-import io.github.dsheirer.alias.id.legacy.nonrecordable.NonRecordable;
 import io.github.dsheirer.alias.id.legacy.siteID.SiteID;
-import io.github.dsheirer.alias.id.legacy.talkgroup.LegacyTalkgroupID;
-import io.github.dsheirer.alias.id.legacy.uniqueID.UniqueID;
 import io.github.dsheirer.alias.id.lojack.LoJackFunctionAndID;
 import io.github.dsheirer.alias.id.priority.Priority;
+import io.github.dsheirer.alias.id.radio.P25FullyQualifiedRadio;
 import io.github.dsheirer.alias.id.radio.Radio;
 import io.github.dsheirer.alias.id.radio.RadioRange;
 import io.github.dsheirer.alias.id.record.Record;
 import io.github.dsheirer.alias.id.status.UnitStatusID;
 import io.github.dsheirer.alias.id.status.UserStatusID;
+import io.github.dsheirer.alias.id.talkgroup.P25FullyQualifiedTalkgroup;
 import io.github.dsheirer.alias.id.talkgroup.Talkgroup;
 import io.github.dsheirer.alias.id.talkgroup.TalkgroupRange;
 import io.github.dsheirer.alias.id.tone.TonesID;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.util.ArrayList;
 import java.util.List;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class AliasFactory
 {
@@ -64,6 +58,11 @@ public class AliasFactory
                 BroadcastChannel copyBroadcast = new BroadcastChannel();
                 copyBroadcast.setChannelName(originalBroadcast.getChannelName());
                 return copyBroadcast;
+            case DCS:
+                Dcs originalDcs = (Dcs)id;
+                Dcs copyDcs = new Dcs();
+                copyDcs.setDCSCode(originalDcs.getDCSCode());
+                return copyDcs;
             case ESN:
                 Esn originalESN = (Esn)id;
                 Esn copyESN = new Esn();
@@ -80,6 +79,18 @@ public class AliasFactory
                 Min copyMin = new Min();
                 copyMin.setMin(originalMin.getMin());
                 return copyMin;
+            case P25_FULLY_QUALIFIED_RADIO_ID:
+                P25FullyQualifiedRadio originalP25 = (P25FullyQualifiedRadio) id;
+                P25FullyQualifiedRadio copyP25 = new P25FullyQualifiedRadio(originalP25.getWacn(),
+                        originalP25.getSystem(), originalP25.getValue());
+                copyP25.setOverlap(originalP25.overlapProperty().get());
+                return copyP25;
+            case P25_FULLY_QUALIFIED_TALKGROUP:
+                P25FullyQualifiedTalkgroup originalFqt = (P25FullyQualifiedTalkgroup) id;
+                P25FullyQualifiedTalkgroup copyFqt = new P25FullyQualifiedTalkgroup(originalFqt.getWacn(),
+                        originalFqt.getSystem(), originalFqt.getValue());
+                copyFqt.setOverlap(originalFqt.overlapProperty().get());
+                return copyFqt;
             case PRIORITY:
                 Priority originalPriority = (Priority)id;
                 Priority copyPriority = new Priority();
@@ -187,6 +198,7 @@ public class AliasFactory
         copy.setGroup(original.getGroup());
         copy.setColor(original.getColor());
         copy.setIconName(original.getIconName());
+        copy.setRecordable(original.isRecordable());
         return copy;
     }
 
@@ -234,65 +246,4 @@ public class AliasFactory
 
         return copy;
     }
-
-    public static AliasID getAliasID(AliasIDType type)
-    {
-        switch(type)
-        {
-            case BROADCAST_CHANNEL:
-                return new BroadcastChannel();
-            case ESN:
-                return new Esn();
-            case FLEETSYNC:
-                return new FleetsyncID();
-            case LTR_NET_UID:
-                return new UniqueID();
-            case LOJACK:
-                return new LoJackFunctionAndID();
-            case MDC1200:
-                return new MDC1200ID();
-            case MIN:
-                return new Min();
-            case MPT1327:
-                return new MPT1327ID();
-            case NON_RECORDABLE:
-                return new NonRecordable();
-            case PRIORITY:
-                return new Priority();
-            case RADIO_ID:
-                return new Radio();
-            case RADIO_ID_RANGE:
-                return new RadioRange();
-            case RECORD:
-                return new Record();
-            case TALKGROUP:
-                return new Talkgroup();
-            case TALKGROUP_RANGE:
-                return new TalkgroupRange();
-            case SITE:
-                return new SiteID();
-            case STATUS:
-                return new UserStatusID();
-            case LEGACY_TALKGROUP:
-                return new LegacyTalkgroupID();
-            default:
-                throw new IllegalArgumentException("Unrecognized Alias ID type: " + type);
-        }
-    }
-
-    public static AliasAction getAliasAction(AliasActionType type)
-    {
-        switch(type)
-        {
-            case BEEP:
-                return new BeepAction();
-            case CLIP:
-                return new ClipAction();
-            case SCRIPT:
-                return new ScriptAction();
-            default:
-                throw new IllegalArgumentException("Unrecognized Alias Action type: " + type);
-        }
-    }
-
 }

src/main/java/io/github/dsheirer/alias/AliasList.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -21,32 +21,34 @@ package io.github.dsheirer.alias;
 import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
 import io.github.dsheirer.alias.id.AliasID;
 import io.github.dsheirer.alias.id.broadcast.BroadcastChannel;
+import io.github.dsheirer.alias.id.dcs.Dcs;
 import io.github.dsheirer.alias.id.esn.Esn;
 import io.github.dsheirer.alias.id.priority.Priority;
+import io.github.dsheirer.alias.id.radio.P25FullyQualifiedRadio;
 import io.github.dsheirer.alias.id.radio.Radio;
 import io.github.dsheirer.alias.id.radio.RadioRange;
 import io.github.dsheirer.alias.id.status.UnitStatusID;
 import io.github.dsheirer.alias.id.status.UserStatusID;
+import io.github.dsheirer.alias.id.talkgroup.P25FullyQualifiedTalkgroup;
 import io.github.dsheirer.alias.id.talkgroup.Talkgroup;
 import io.github.dsheirer.alias.id.talkgroup.TalkgroupRange;
 import io.github.dsheirer.alias.id.tone.TonesID;
 import io.github.dsheirer.identifier.Identifier;
 import io.github.dsheirer.identifier.IdentifierCollection;
+import io.github.dsheirer.identifier.dcs.DCSIdentifier;
 import io.github.dsheirer.identifier.esn.ESNIdentifier;
 import io.github.dsheirer.identifier.patch.PatchGroup;
 import io.github.dsheirer.identifier.patch.PatchGroupIdentifier;
+import io.github.dsheirer.identifier.radio.FullyQualifiedRadioIdentifier;
 import io.github.dsheirer.identifier.radio.RadioIdentifier;
 import io.github.dsheirer.identifier.status.UnitStatusIdentifier;
 import io.github.dsheirer.identifier.status.UserStatusIdentifier;
+import io.github.dsheirer.identifier.talkgroup.FullyQualifiedTalkgroupIdentifier;
 import io.github.dsheirer.identifier.talkgroup.TalkgroupIdentifier;
 import io.github.dsheirer.identifier.tone.ToneIdentifier;
 import io.github.dsheirer.identifier.tone.ToneSequence;
+import io.github.dsheirer.module.decode.dcs.DCSCode;
 import io.github.dsheirer.protocol.Protocol;
-import javafx.collections.FXCollections;
-import javafx.collections.ObservableList;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -57,6 +59,10 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.TreeMap;
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * List of aliases that share the same alias list name and provides convenient methods for looking up alias
@@ -67,6 +73,7 @@ public class AliasList
     private final static Logger mLog = LoggerFactory.getLogger(AliasList.class);
     private Map<Protocol,TalkgroupAliasList> mTalkgroupProtocolMap = new EnumMap<>(Protocol.class);
     private Map<Protocol,RadioAliasList> mRadioProtocolMap = new EnumMap<>(Protocol.class);
+    private Map<DCSCode,Alias> mDCSCodeAliasMap = new EnumMap<>(DCSCode.class);
     private Map<String,Alias> mESNMap = new HashMap<>();
     private Map<Integer,Alias> mUnitStatusMap = new HashMap<>();
     private Map<Integer,Alias> mUserStatusMap = new HashMap<>();
@@ -152,6 +159,32 @@ public class AliasList
 
                         talkgroupRangeAliasList.add(talkgroupRange, alias);
                         break;
+                    case P25_FULLY_QUALIFIED_RADIO_ID:
+                        P25FullyQualifiedRadio qualifiedRadio = (P25FullyQualifiedRadio) id;
+
+                        RadioAliasList p25RadioAliasList = mRadioProtocolMap.get(qualifiedRadio.getProtocol());
+
+                        if(p25RadioAliasList == null)
+                        {
+                            p25RadioAliasList = new RadioAliasList();
+                            mRadioProtocolMap.put(qualifiedRadio.getProtocol(), p25RadioAliasList);
+                        }
+
+                        p25RadioAliasList.add(qualifiedRadio, alias);
+                        break;
+                    case P25_FULLY_QUALIFIED_TALKGROUP:
+                        P25FullyQualifiedTalkgroup qualifiedTalkgroup = (P25FullyQualifiedTalkgroup) id;
+
+                        TalkgroupAliasList p25TalkgroupAliasList = mTalkgroupProtocolMap.get(qualifiedTalkgroup.getProtocol());
+
+                        if(p25TalkgroupAliasList == null)
+                        {
+                            p25TalkgroupAliasList = new TalkgroupAliasList();
+                            mTalkgroupProtocolMap.put(qualifiedTalkgroup.getProtocol(), p25TalkgroupAliasList);
+                        }
+
+                        p25TalkgroupAliasList.add(qualifiedTalkgroup, alias);
+                        break;
                     case RADIO_ID:
                         Radio radio = (Radio)id;
 
@@ -178,6 +211,12 @@ public class AliasList
 
                         radioRangeAliasList.add(radioRange, alias);
                         break;
+                    case DCS:
+                        if(id instanceof Dcs dcs)
+                        {
+                            mDCSCodeAliasMap.put(dcs.getDCSCode(), alias);
+                        }
+                        break;
                     case ESN:
                         String esn = ((Esn)id).getEsn();
 
@@ -379,6 +418,8 @@ public class AliasList
                     }
                     break;
                 case PATCH_GROUP:
+                    List<Alias> aliases = new ArrayList<>();
+
                     PatchGroupIdentifier patchGroupIdentifier = (PatchGroupIdentifier)identifier;
                     PatchGroup patchGroup = patchGroupIdentifier.getValue();
 
@@ -386,8 +427,6 @@ public class AliasList
 
                     if(patchGroupAliasList != null)
                     {
-                        List<Alias> aliases = new ArrayList<>();
-
                         Alias alias = patchGroupAliasList.getAlias(patchGroup.getPatchGroup());
 
                         if(alias != null)
@@ -395,19 +434,36 @@ public class AliasList
                             aliases.add(alias);
                         }
 
-                        for(TalkgroupIdentifier patchedGroup: patchGroup.getPatchedGroupIdentifiers())
+                        for(TalkgroupIdentifier patchedTalkgroup: patchGroup.getPatchedTalkgroupIdentifiers())
                         {
-                            Alias patchedAlias = patchGroupAliasList.getAlias(patchedGroup);
+                            Alias patchedTalkgroupAlias = patchGroupAliasList.getAlias(patchedTalkgroup);
 
-                            if(patchedAlias != null && !aliases.contains(patchedAlias))
+                            if(patchedTalkgroupAlias != null && !aliases.contains(patchedTalkgroupAlias))
                             {
-                                aliases.add(patchedAlias);
+                                aliases.add(patchedTalkgroupAlias);
                             }
                         }
-
-                        return aliases;
                     }
-                    break;
+
+                    if(patchGroup.hasPatchedRadios())
+                    {
+                        RadioAliasList radioAliasList = mRadioProtocolMap.get(patchGroupIdentifier.getProtocol());
+
+                        if(radioAliasList != null)
+                        {
+                            for(RadioIdentifier patchedRadio: patchGroup.getPatchedRadioIdentifiers())
+                            {
+                                Alias patchedRadioAlias = radioAliasList.getAlias(patchedRadio);
+
+                                if(patchedRadioAlias != null && !aliases.contains(patchedRadioAlias))
+                                {
+                                    aliases.add(patchedRadioAlias);
+                                }
+                            }
+                        }
+                    }
+
+                    return aliases;
                 case RADIO:
                     RadioIdentifier radio = (RadioIdentifier)identifier;
 
@@ -439,9 +495,9 @@ public class AliasList
                     }
                     break;
                 case TONE:
-                    if(identifier instanceof ToneIdentifier)
+                    if(identifier instanceof ToneIdentifier toneIdentifier)
                     {
-                        ToneSequence toneSequence = ((ToneIdentifier)identifier).getValue();
+                        ToneSequence toneSequence = toneIdentifier.getValue();
 
                         if(toneSequence != null && toneSequence.hasTones())
                         {
@@ -454,6 +510,15 @@ public class AliasList
                             }
                         }
                     }
+                    else if(identifier instanceof DCSIdentifier dcsIdentifier)
+                    {
+                        DCSCode dcsCode = dcsIdentifier.getValue();
+
+                        if(dcsCode != null)
+                        {
+                            return toList(mDCSCodeAliasMap.get(dcsCode));
+                        }
+                    }
                     break;
             }
         }
@@ -465,9 +530,7 @@ public class AliasList
     {
         if(alias != null)
         {
-            List<Alias> aliases = new ArrayList<>();
-            aliases.add(alias);
-            return aliases;
+            return Collections.singletonList(alias);
         }
 
         return Collections.emptyList();
@@ -590,6 +653,7 @@ public class AliasList
      */
     public class TalkgroupAliasList
     {
+        private Map<String,Alias> mFullyQualifiedTalkgroupAliasMap = new HashMap<>();
         private Map<Integer,Alias> mTalkgroupAliasMap = new TreeMap<>();
         private Map<TalkgroupRange, Alias> mTalkgroupRangeAliasMap = new HashMap<>();
 
@@ -599,6 +663,11 @@ public class AliasList
 
         public Alias getAlias(TalkgroupIdentifier identifier)
         {
+            if(identifier instanceof FullyQualifiedTalkgroupIdentifier fqti)
+            {
+                return mFullyQualifiedTalkgroupAliasMap.get(fqti.toString());
+            }
+
             int value = identifier.getValue();
 
             Alias mapValue = mTalkgroupAliasMap.get(value);
@@ -620,26 +689,55 @@ public class AliasList
 
         public void add(Talkgroup talkgroup, Alias alias)
         {
-            //Detect talkgroup collisions and set overlap flag for both
-            if(mTalkgroupAliasMap.containsKey(talkgroup.getValue()))
+            if(talkgroup instanceof P25FullyQualifiedTalkgroup fqt)
             {
-                Alias existing = mTalkgroupAliasMap.get(talkgroup.getValue());
-
-                if(!existing.equals(alias))
+                //Detect collisions
+                if(mFullyQualifiedTalkgroupAliasMap.containsKey(fqt.getHashKey()))
                 {
-                    talkgroup.setOverlap(true);
+                    Alias existing = mFullyQualifiedTalkgroupAliasMap.get(fqt.getHashKey());
 
-                    for(AliasID aliasID: existing.getAliasIdentifiers())
+                    if(!existing.equals(alias))
                     {
-                        if(aliasID instanceof Talkgroup && ((Talkgroup)aliasID).getValue() == talkgroup.getValue())
+                        fqt.setOverlap(true);
+
+                        for(AliasID aliasID: existing.getAliasIdentifiers())
                         {
-                            aliasID.setOverlap(true);
+                            if(aliasID instanceof P25FullyQualifiedTalkgroup existingFqt &&
+                                    existingFqt.getHashKey().contentEquals(fqt.getHashKey()))
+                            {
+                                aliasID.setOverlap(true);
+                            }
                         }
                     }
                 }
+                else
+                {
+                    mFullyQualifiedTalkgroupAliasMap.put(fqt.getHashKey(), alias);
+                }
             }
+            else
+            {
+                //Detect talkgroup collisions and set overlap flag for both
+                if(mTalkgroupAliasMap.containsKey(talkgroup.getValue()))
+                {
+                    Alias existing = mTalkgroupAliasMap.get(talkgroup.getValue());
 
-            mTalkgroupAliasMap.put(talkgroup.getValue(), alias);
+                    if(!existing.equals(alias))
+                    {
+                        talkgroup.setOverlap(true);
+
+                        for(AliasID aliasID: existing.getAliasIdentifiers())
+                        {
+                            if(aliasID instanceof Talkgroup && ((Talkgroup)aliasID).getValue() == talkgroup.getValue())
+                            {
+                                aliasID.setOverlap(true);
+                            }
+                        }
+                    }
+                }
+
+                mTalkgroupAliasMap.put(talkgroup.getValue(), alias);
+            }
         }
 
         public void add(TalkgroupRange talkgroupRange, Alias alias)
@@ -672,6 +770,7 @@ public class AliasList
      */
     public class RadioAliasList
     {
+        private Map<String,Alias> mFullyQualifiedRadioAliasMap = new HashMap<>();
         private Map<Integer,Alias> mRadioAliasMap = new TreeMap<>();
         private Map<RadioRange, Alias> mRadioRangeAliasMap = new HashMap<>();
 
@@ -681,6 +780,11 @@ public class AliasList
 
         public Alias getAlias(RadioIdentifier identifier)
         {
+            if(identifier instanceof FullyQualifiedRadioIdentifier fqri)
+            {
+                return mFullyQualifiedRadioAliasMap.get(fqri.toString());
+            }
+
             int value = identifier.getValue();
 
             Alias mapValue = mRadioAliasMap.get(value);
@@ -702,26 +806,55 @@ public class AliasList
 
         public void add(Radio radio, Alias alias)
         {
-            //Detect collisions
-            if(mRadioAliasMap.containsKey(radio.getValue()))
+            if(radio instanceof P25FullyQualifiedRadio fqr)
             {
-                Alias existing = mRadioAliasMap.get(radio.getValue());
-
-                if(!existing.equals(alias))
+                //Detect collisions
+                if(mFullyQualifiedRadioAliasMap.containsKey(fqr.getHashKey()))
                 {
-                    radio.setOverlap(true);
+                    Alias existing = mFullyQualifiedRadioAliasMap.get(fqr.getHashKey());
 
-                    for(AliasID aliasID: existing.getAliasIdentifiers())
+                    if(!existing.equals(alias))
                     {
-                        if(aliasID instanceof Radio && ((Radio)aliasID).getValue() == radio.getValue())
+                        fqr.setOverlap(true);
+
+                        for(AliasID aliasID: existing.getAliasIdentifiers())
                         {
-                            aliasID.setOverlap(true);
+                            if(aliasID instanceof P25FullyQualifiedRadio existingFqr &&
+                                    existingFqr.getHashKey().contentEquals(fqr.getHashKey()))
+                            {
+                                aliasID.setOverlap(true);
+                            }
                         }
                     }
                 }
+                else
+                {
+                    mFullyQualifiedRadioAliasMap.put(fqr.getHashKey(), alias);
+                }
             }
+            else
+            {
+                //Detect collisions
+                if(mRadioAliasMap.containsKey(radio.getValue()))
+                {
+                    Alias existing = mRadioAliasMap.get(radio.getValue());
 
-            mRadioAliasMap.put(radio.getValue(), alias);
+                    if(!existing.equals(alias))
+                    {
+                        radio.setOverlap(true);
+
+                        for(AliasID aliasID: existing.getAliasIdentifiers())
+                        {
+                            if(aliasID instanceof Radio existingRadio && (existingRadio.getValue() == radio.getValue()))
+                            {
+                                aliasID.setOverlap(true);
+                            }
+                        }
+                    }
+                }
+
+                mRadioAliasMap.put(radio.getValue(), alias);
+            }
         }
 
         public void add(RadioRange radioRange, Alias alias)

src/main/java/io/github/dsheirer/alias/AliasModel.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -23,17 +23,16 @@ import io.github.dsheirer.alias.id.AliasIDType;
 import io.github.dsheirer.alias.id.broadcast.BroadcastChannel;
 import io.github.dsheirer.identifier.IdentifierCollection;
 import io.github.dsheirer.identifier.configuration.AliasListConfigurationIdentifier;
-import javafx.collections.FXCollections;
-import javafx.collections.ListChangeListener;
-import javafx.collections.ObservableList;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import javafx.collections.FXCollections;
+import javafx.collections.ListChangeListener;
+import javafx.collections.ObservableList;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Alias Model contains all aliases and is responsible for creation and management of alias lists.  Alias lists are a
@@ -184,10 +183,8 @@ public class AliasModel
      */
     public void addAliases(List<Alias> aliases)
     {
-        for(Alias alias : aliases)
-        {
-            addAlias(alias);
-        }
+        removeAliases(aliases);
+        mAliases.addAll(aliases);
     }
 
     /**
@@ -241,6 +238,26 @@ public class AliasModel
         }
     }
 
+    /**
+     * Removes the list of aliases from this model and any alias lists that might contain each alias.
+     * @param aliases
+     */
+    public void removeAliases(List<Alias> aliases)
+    {
+        if(aliases != null && !aliases.isEmpty())
+        {
+            mAliases.removeAll(aliases);
+
+            for(Alias alias: aliases)
+            {
+                if(hasAliasList(alias.getAliasListName()))
+                {
+                    getAliasList(alias.getAliasListName()).removeAlias(alias);
+                }
+            }
+        }
+    }
+
     /**
      * Retrieves all aliases that match the alias list and have at least one alias ID of the specified type
      * @param aliasListName to search

src/main/java/io/github/dsheirer/alias/id/AliasID.java

@@ -1,23 +1,20 @@
 /*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
- *  * ******************************************************************************
- *  * Copyright (C) 2014-2019 Dennis Sheirer
- *  *
- *  * This program is free software: you can redistribute it and/or modify
- *  * it under the terms of the GNU General Public License as published by
- *  * the Free Software Foundation, either version 3 of the License, or
- *  * (at your option) any later version.
- *  *
- *  * This program is distributed in the hope that it will be useful,
- *  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  * GNU General Public License for more details.
- *  *
- *  * You should have received a copy of the GNU General Public License
- *  * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *  * *****************************************************************************
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
  */
 package io.github.dsheirer.alias.id;
 
@@ -26,6 +23,7 @@ import com.fasterxml.jackson.annotation.JsonSubTypes;
 import com.fasterxml.jackson.annotation.JsonTypeInfo;
 import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlRootElement;
 import io.github.dsheirer.alias.id.broadcast.BroadcastChannel;
+import io.github.dsheirer.alias.id.dcs.Dcs;
 import io.github.dsheirer.alias.id.esn.Esn;
 import io.github.dsheirer.alias.id.legacy.fleetsync.FleetsyncID;
 import io.github.dsheirer.alias.id.legacy.mdc.MDC1200ID;
@@ -37,11 +35,13 @@ import io.github.dsheirer.alias.id.legacy.talkgroup.LegacyTalkgroupID;
 import io.github.dsheirer.alias.id.legacy.uniqueID.UniqueID;
 import io.github.dsheirer.alias.id.lojack.LoJackFunctionAndID;
 import io.github.dsheirer.alias.id.priority.Priority;
+import io.github.dsheirer.alias.id.radio.P25FullyQualifiedRadio;
 import io.github.dsheirer.alias.id.radio.Radio;
 import io.github.dsheirer.alias.id.radio.RadioRange;
 import io.github.dsheirer.alias.id.record.Record;
 import io.github.dsheirer.alias.id.status.UnitStatusID;
 import io.github.dsheirer.alias.id.status.UserStatusID;
+import io.github.dsheirer.alias.id.talkgroup.P25FullyQualifiedTalkgroup;
 import io.github.dsheirer.alias.id.talkgroup.Talkgroup;
 import io.github.dsheirer.alias.id.talkgroup.TalkgroupRange;
 import io.github.dsheirer.alias.id.tone.TonesID;
@@ -54,6 +54,7 @@ import javafx.util.Callback;
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "type")
 @JsonSubTypes({
     @JsonSubTypes.Type(value = BroadcastChannel.class, name = "broadcastChannel"),
+    @JsonSubTypes.Type(value = Dcs.class, name = "dcs"),
     @JsonSubTypes.Type(value = Esn.class, name = "esn"),
     @JsonSubTypes.Type(value = FleetsyncID.class, name = "fleetsyncID"),
     @JsonSubTypes.Type(value = LegacyTalkgroupID.class, name = "talkgroupID"),
@@ -62,6 +63,8 @@ import javafx.util.Callback;
     @JsonSubTypes.Type(value = Min.class, name = "min"),
     @JsonSubTypes.Type(value = MPT1327ID.class, name = "mpt1327ID"),
     @JsonSubTypes.Type(value = NonRecordable.class, name = "nonRecordable"),
+    @JsonSubTypes.Type(value = P25FullyQualifiedRadio.class, name = "p25FullyQualifiedRadio"),
+    @JsonSubTypes.Type(value = P25FullyQualifiedTalkgroup.class, name = "p25FullyQualifiedTalkgroup"),
     @JsonSubTypes.Type(value = Priority.class, name = "priority"),
     @JsonSubTypes.Type(value = Radio.class, name = "radio"),
     @JsonSubTypes.Type(value = RadioRange.class, name = "radioRange"),

src/main/java/io/github/dsheirer/alias/id/AliasIDType.java

@@ -1,23 +1,20 @@
 /*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
- *  * ******************************************************************************
- *  * Copyright (C) 2014-2019 Dennis Sheirer
- *  *
- *  * This program is free software: you can redistribute it and/or modify
- *  * it under the terms of the GNU General Public License as published by
- *  * the Free Software Foundation, either version 3 of the License, or
- *  * (at your option) any later version.
- *  *
- *  * This program is distributed in the hope that it will be useful,
- *  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  * GNU General Public License for more details.
- *  *
- *  * You should have received a copy of the GNU General Public License
- *  * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *  * *****************************************************************************
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
  */
 package io.github.dsheirer.alias.id;
 
@@ -26,11 +23,14 @@ import java.util.EnumSet;
 public enum AliasIDType
 {
     BROADCAST_CHANNEL("Audio Broadcast Channel"),
+    DCS("Digital Coded Squelch (DCS)"),
     ESN("ESN"),
     INVERT("Audio Inversion"),
     LOJACK("LoJack"),
     LTR_NET_UID("LTR-Net UID"),
     MIN("Passport MIN"),
+    P25_FULLY_QUALIFIED_RADIO_ID("P25 Fully Qualified Radio ID"),
+    P25_FULLY_QUALIFIED_TALKGROUP("P25 Fully Qualified Talkgroup"),
     PRIORITY("Audio Priority"),
     RADIO_ID("Radio ID"),
     RADIO_ID_RANGE("Radio ID Range"),
@@ -58,7 +58,7 @@ public enum AliasIDType
 
     //Values used by the View-By alias editor
     public static EnumSet<AliasIDType> VIEW_BY_VALUES = EnumSet.of(TALKGROUP, TALKGROUP_RANGE, RADIO_ID, RADIO_ID_RANGE,
-        UNIT_STATUS, STATUS, TONES);
+        P25_FULLY_QUALIFIED_RADIO_ID, P25_FULLY_QUALIFIED_TALKGROUP, UNIT_STATUS, STATUS, TONES);
 
     public String toString()
     {

src/main/java/io/github/dsheirer/alias/id/dcs/Dcs.java

@@ -0,0 +1,111 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.alias.id.dcs;
+
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
+import io.github.dsheirer.alias.id.AliasID;
+import io.github.dsheirer.alias.id.AliasIDType;
+import io.github.dsheirer.module.decode.dcs.DCSCode;
+
+/**
+ * Digital Coded Squelch (DCS) tone identifier
+ */
+public class Dcs extends AliasID implements Comparable<Dcs>
+{
+    private DCSCode mDCSCode;
+
+    @Override
+    public AliasIDType getType()
+    {
+        return AliasIDType.DCS;
+    }
+
+    @Override
+    public boolean matches(AliasID id)
+    {
+        if(isValid() && id instanceof Dcs other)
+        {
+            return other.isValid() && getDCSCode().equals(other.getDCSCode());
+        }
+
+        return false;
+    }
+
+    /**
+     * DCS code
+     * @return DCS code or null.
+     */
+    @JacksonXmlProperty(isAttribute = true, localName = "code")
+    public DCSCode getDCSCode()
+    {
+        return mDCSCode;
+    }
+
+    /**
+     * Sets the DCS code value.
+     * @param dcsCode to set
+     */
+    public void setDCSCode(DCSCode dcsCode)
+    {
+        mDCSCode = dcsCode;
+        updateValueProperty();
+    }
+
+    @Override
+    public boolean isValid()
+    {
+        return mDCSCode != null;
+    }
+
+    @Override
+    public boolean isAudioIdentifier()
+    {
+        return false;
+    }
+
+    @Override
+    public String toString()
+    {
+        if(isValid())
+        {
+            return getDCSCode().toString();
+        }
+
+        return "DCS-Invalid - No Tone Selected";
+    }
+
+    @Override
+    public int compareTo(Dcs o)
+    {
+        if(isValid())
+        {
+            if(o.isValid())
+            {
+                return getDCSCode().compareTo(o.getDCSCode());
+            }
+            else
+            {
+                return 1;
+            }
+        }
+
+        return -1;
+    }
+}

src/main/java/io/github/dsheirer/alias/id/radio/P25FullyQualifiedRadio.java

@@ -0,0 +1,127 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.alias.id.radio;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
+import io.github.dsheirer.alias.id.AliasIDType;
+import io.github.dsheirer.protocol.Protocol;
+
+/**
+ * Fully qualified radio.  Note: this is only for P25.
+ */
+public class P25FullyQualifiedRadio extends Radio
+{
+    private int mWacn;
+    private int mSystem;
+
+    public P25FullyQualifiedRadio()
+    {
+        //No-arg JAXB constructor
+    }
+
+    /**
+     * Constructs an instance
+     * @param wacn for the radio
+     * @param system for the radio
+     * @param id for the radio
+     */
+    public P25FullyQualifiedRadio(int wacn, int system, int id)
+    {
+        super(Protocol.APCO25, id);
+        mWacn = wacn;
+        mSystem = system;
+    }
+
+    @Override
+    public AliasIDType getType()
+    {
+        return AliasIDType.P25_FULLY_QUALIFIED_RADIO_ID;
+    }
+
+    /**
+     * WACN for this radio
+     * @return wacn
+     */
+    @JacksonXmlProperty(isAttribute = true, localName = "wacn")
+    public int getWacn()
+    {
+        return mWacn;
+    }
+
+    /**
+     * Sets the WACN for this radio
+     * @param wacn for this radio
+     */
+    public void setWacn(int wacn)
+    {
+        mWacn = wacn;
+    }
+
+    /**
+     * System for this radio
+     * @return system
+     */
+    @JacksonXmlProperty(isAttribute = true, localName = "system")
+    public int getSystem()
+    {
+        return mSystem;
+    }
+
+    /**
+     * Sets the system for this radio
+     * @param system for this radio
+     */
+    public void setSystem(int system)
+    {
+        mSystem = system;
+    }
+
+    @Override
+    public String toString()
+    {
+        StringBuilder sb = new StringBuilder();
+
+        sb.append("Fully Qualified Radio ID:").append(getWacn());
+        sb.append(".").append(getSystem());
+        sb.append(".").append(getValue());
+        sb.append(" Protocol:").append((getProtocol()));
+
+        if(!isValid())
+        {
+            sb.append(" **NOT VALID**");
+        }
+
+        return sb.toString();
+    }
+
+    /**
+     * Hashable string key for use in a lookup map
+     */
+    @JsonIgnore
+    public String getHashKey()
+    {
+        StringBuilder sb = new StringBuilder();
+        sb.append(getWacn());
+        sb.append(".").append(getSystem());
+        sb.append(".").append(getValue());
+        return sb.toString();
+    }
+}

src/main/java/io/github/dsheirer/alias/id/talkgroup/P25FullyQualifiedTalkgroup.java

@@ -0,0 +1,128 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.alias.id.talkgroup;
+
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
+import io.github.dsheirer.alias.id.AliasIDType;
+import io.github.dsheirer.protocol.Protocol;
+
+/**
+ * Fully qualified talkgroup.  Note: this is only for P25.
+ */
+public class P25FullyQualifiedTalkgroup extends Talkgroup
+{
+    private int mWacn;
+    private int mSystem;
+
+    public P25FullyQualifiedTalkgroup()
+    {
+        //No-arg JAXB constructor
+    }
+
+    /**
+     * Constructs an instance
+     * @param wacn for the radio
+     * @param system for the radio
+     * @param talkgroup value
+     */
+    public P25FullyQualifiedTalkgroup(int wacn, int system, int talkgroup)
+    {
+        super(Protocol.APCO25, talkgroup);
+        mWacn = wacn;
+        mSystem = system;
+    }
+
+    @Override
+    public AliasIDType getType()
+    {
+        return AliasIDType.P25_FULLY_QUALIFIED_TALKGROUP;
+    }
+
+    /**
+     * WACN for this radio
+     * @return wacn
+     */
+    @JacksonXmlProperty(isAttribute = true, localName = "wacn")
+    public int getWacn()
+    {
+        return mWacn;
+    }
+
+    /**
+     * Sets the WACN for this radio
+     * @param wacn for this radio
+     */
+    public void setWacn(int wacn)
+    {
+        mWacn = wacn;
+    }
+
+    /**
+     * System for this radio
+     * @return system
+     */
+    @JacksonXmlProperty(isAttribute = true, localName = "system")
+    public int getSystem()
+    {
+        return mSystem;
+    }
+
+    /**
+     * Sets the system for this radio
+     * @param system for this radio
+     */
+    public void setSystem(int system)
+    {
+        mSystem = system;
+    }
+
+    @Override
+    public String toString()
+    {
+        StringBuilder sb = new StringBuilder();
+
+        sb.append("Fully Qualified Radio ID:").append(getWacn());
+        sb.append(".").append(getSystem());
+        sb.append(".").append(getValue());
+        sb.append(" Protocol:").append((getProtocol()));
+
+        if(!isValid())
+        {
+            sb.append(" **NOT VALID**");
+        }
+
+        return sb.toString();
+    }
+
+    /**
+     * Hashable string key for use in a lookup map
+     * @return
+     */
+    @JsonIgnore
+    public String getHashKey()
+    {
+        StringBuilder sb = new StringBuilder();
+        sb.append(getWacn());
+        sb.append(".").append(getSystem());
+        sb.append(".").append(getValue());
+        return sb.toString();
+    }
+}

src/main/java/io/github/dsheirer/alias/id/talkgroup/TalkgroupFormat.java

@@ -34,6 +34,8 @@ import io.github.dsheirer.protocol.Protocol;
  */
 public enum TalkgroupFormat
 {
+    AM("*****", 1, 0xFFFF, "1 to 65,535",
+            "AM valid value range is 1-65,535"),
     APCO25("********", 0, 0xFFFF, "0 to 65,535",
         "<html>APCO25 talkgroup valid range is 0 to 65,535"),
     DMR("********", 0, 0xFFFFFF, "0 to 16,777,215",
@@ -122,6 +124,8 @@ public enum TalkgroupFormat
 
         switch(protocol)
         {
+            case AM:
+                return AM;
             case APCO25:
                 return APCO25;
             case FLEETSYNC:

src/main/java/io/github/dsheirer/alias/id/talkgroup/TalkgroupFormatter.java

@@ -1,7 +1,6 @@
 /*
- * ******************************************************************************
- * sdrtrunk
- * Copyright (C) 2014-2019 Dennis Sheirer
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -15,7 +14,7 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
- * *****************************************************************************
+ * ****************************************************************************
  */
 
 package io.github.dsheirer.alias.id.talkgroup;
@@ -23,21 +22,20 @@ package io.github.dsheirer.alias.id.talkgroup;
 import io.github.dsheirer.preference.identifier.IntegerFormat;
 import io.github.dsheirer.preference.identifier.talkgroup.APCO25TalkgroupFormatter;
 import io.github.dsheirer.preference.identifier.talkgroup.AbstractIntegerFormatter;
+import io.github.dsheirer.preference.identifier.talkgroup.AnalogTalkgroupFormatter;
 import io.github.dsheirer.preference.identifier.talkgroup.DMRTalkgroupFormatter;
 import io.github.dsheirer.preference.identifier.talkgroup.FleetsyncTalkgroupFormatter;
 import io.github.dsheirer.preference.identifier.talkgroup.LTRTalkgroupFormatter;
 import io.github.dsheirer.preference.identifier.talkgroup.MDC1200TalkgroupFormatter;
 import io.github.dsheirer.preference.identifier.talkgroup.MPT1327TalkgroupFormatter;
-import io.github.dsheirer.preference.identifier.talkgroup.NBFMTalkgroupFormatter;
 import io.github.dsheirer.preference.identifier.talkgroup.PassportTalkgroupFormatter;
 import io.github.dsheirer.preference.identifier.talkgroup.UnknownTalkgroupFormatter;
 import io.github.dsheirer.protocol.Protocol;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.text.ParseException;
 import java.util.EnumMap;
 import java.util.Map;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Protocol-specific formatting of talkgroup values and parsing of formatted talkgroup values.
@@ -49,6 +47,10 @@ public class TalkgroupFormatter
 
     static
     {
+        AnalogTalkgroupFormatter analogTalkgroupFormatter = new AnalogTalkgroupFormatter();
+        mFormatterMap.put(Protocol.AM, analogTalkgroupFormatter);
+        mFormatterMap.put(Protocol.NBFM, analogTalkgroupFormatter);
+
         mFormatterMap.put(Protocol.APCO25, new APCO25TalkgroupFormatter());
         mFormatterMap.put(Protocol.DMR, new DMRTalkgroupFormatter());
         mFormatterMap.put(Protocol.FLEETSYNC, new FleetsyncTalkgroupFormatter());
@@ -57,7 +59,6 @@ public class TalkgroupFormatter
         mFormatterMap.put(Protocol.LTR_NET, ltr);
         mFormatterMap.put(Protocol.MDC1200, new MDC1200TalkgroupFormatter());
         mFormatterMap.put(Protocol.MPT1327, new MPT1327TalkgroupFormatter());
-        mFormatterMap.put(Protocol.NBFM, new NBFMTalkgroupFormatter());
         mFormatterMap.put(Protocol.PASSPORT, new PassportTalkgroupFormatter());
         mFormatterMap.put(Protocol.UNKNOWN, new UnknownTalkgroupFormatter());
     }

src/main/java/io/github/dsheirer/audio/AbstractAudioModule.java

@@ -1,7 +1,6 @@
 /*
- * ******************************************************************************
- * sdrtrunk
- * Copyright (C) 2014-2018 Dennis Sheirer
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -15,7 +14,7 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
- * *****************************************************************************
+ * ****************************************************************************
  */
 
 package io.github.dsheirer.audio;
@@ -106,7 +105,7 @@ public abstract class AbstractAudioModule extends Module implements IAudioSegmen
      * Gets the current audio segment, or creates a new audio segment as necessary and broadcasts it to any registered
      * listener(s).
      */
-    protected AudioSegment getAudioSegment()
+    public AudioSegment getAudioSegment()
     {
         synchronized(this)
         {
@@ -135,7 +134,7 @@ public abstract class AbstractAudioModule extends Module implements IAudioSegmen
         }
     }
 
-    protected void addAudio(float[] audioBuffer)
+    public void addAudio(float[] audioBuffer)
     {
         AudioSegment audioSegment = getAudioSegment();
 

src/main/java/io/github/dsheirer/audio/AudioModule.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -43,6 +43,7 @@ public class AudioModule extends AbstractAudioModule implements ISquelchStateLis
 {
     private static final Logger mLog = LoggerFactory.getLogger(AudioModule.class);
     private static float[] sHighPassFilterCoefficients;
+    private final boolean mAudioFilterEnable;
 
     static
     {
@@ -70,27 +71,33 @@ public class AudioModule extends AbstractAudioModule implements ISquelchStateLis
         }
     }
 
-    private IRealFilter mHighPassFilter = FilterFactory.getRealFilter(sHighPassFilterCoefficients);
-    private SquelchStateListener mSquelchStateListener = new SquelchStateListener();
+    private final IRealFilter mHighPassFilter = FilterFactory.getRealFilter(sHighPassFilterCoefficients);
+    private final SquelchStateListener mSquelchStateListener = new SquelchStateListener();
     private SquelchState mSquelchState = SquelchState.SQUELCH;
 
     /**
      * Creates an Audio Module.
      *
      * @param aliasList for aliasing identifiers
+     * @param timeslot for this audio module
      * @param maxAudioSegmentLength in milliseconds
+     * @param audioFilterEnable to enable or disable high-pass audio filter
      */
-    public AudioModule(AliasList aliasList, int timeslot, long maxAudioSegmentLength)
+    public AudioModule(AliasList aliasList, int timeslot, long maxAudioSegmentLength, boolean audioFilterEnable)
     {
         super(aliasList, timeslot, maxAudioSegmentLength);
+        mAudioFilterEnable = audioFilterEnable;
     }
 
     /**
      * Creates an Audio Module.
+     * @param aliasList for aliasing identifiers
+     * @param audioFilterEnable to enable or disable high-pass audio filter
      */
-    public AudioModule(AliasList aliasList)
+    public AudioModule(AliasList aliasList, boolean audioFilterEnable)
     {
         super(aliasList);
+        mAudioFilterEnable = audioFilterEnable;
     }
 
     @Override
@@ -121,7 +128,11 @@ public class AudioModule extends AbstractAudioModule implements ISquelchStateLis
     {
         if(mSquelchState == SquelchState.UNSQUELCH)
         {
-            audioBuffer = mHighPassFilter.filter(audioBuffer);
+            if(mAudioFilterEnable)
+            {
+                audioBuffer = mHighPassFilter.filter(audioBuffer);
+            }
+
             addAudio(audioBuffer);
         }
     }
@@ -141,11 +152,16 @@ public class AudioModule extends AbstractAudioModule implements ISquelchStateLis
         @Override
         public void receive(SquelchStateEvent event)
         {
-            mSquelchState = event.getSquelchState();
+            SquelchState squelchState = event.getSquelchState();
 
-            if(mSquelchState == SquelchState.SQUELCH)
+            if(mSquelchState != squelchState)
             {
-                closeAudioSegment();
+                mSquelchState = squelchState;
+
+                if(mSquelchState == SquelchState.SQUELCH)
+                {
+                    closeAudioSegment();
+                }
             }
         }
     }

src/main/java/io/github/dsheirer/audio/AudioSegment.java

@@ -1,18 +1,21 @@
-/*******************************************************************************
- * sdr-trunk
- * Copyright (C) 2014-2020 Dennis Sheirer
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
- * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
- * License as published by  the Free Software Foundation, either version 3 of the License, or  (at your option) any
- * later version.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
- * This program is distributed in the hope that it will be useful,  but WITHOUT ANY WARRANTY; without even the implied
- * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License  along with this program.
- * If not, see <http://www.gnu.org/licenses/>
- *
- ******************************************************************************/
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
 
 package io.github.dsheirer.audio;
 
@@ -26,15 +29,6 @@ import io.github.dsheirer.identifier.IdentifierUpdateNotification;
 import io.github.dsheirer.identifier.MutableIdentifierCollection;
 import io.github.dsheirer.sample.Broadcaster;
 import io.github.dsheirer.sample.Listener;
-import javafx.beans.property.BooleanProperty;
-import javafx.beans.property.IntegerProperty;
-import javafx.beans.property.SimpleBooleanProperty;
-import javafx.beans.property.SimpleIntegerProperty;
-import javafx.collections.FXCollections;
-import javafx.collections.ObservableSet;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Date;
@@ -43,6 +37,14 @@ import java.util.List;
 import java.util.Set;
 import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.atomic.AtomicInteger;
+import javafx.beans.property.BooleanProperty;
+import javafx.beans.property.IntegerProperty;
+import javafx.beans.property.SimpleBooleanProperty;
+import javafx.beans.property.SimpleIntegerProperty;
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableSet;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Audio segment containing all related metadata and a dynamic collection of audio packets.  An audio segment can be
@@ -138,6 +140,15 @@ public class AudioSegment implements Listener<IdentifierUpdateNotification>
         return mComplete;
     }
 
+    /**
+     * Indicates if this audio segment is completed.
+     * @return true if completed.
+     */
+    public boolean isComplete()
+    {
+        return mComplete.get();
+    }
+
     /**
      * Duplicate call audio property.  This flag is set to true whenever a duplicate call detection function detects
      * an audio segment is a duplicate.

src/main/java/io/github/dsheirer/audio/broadcast/BroadcastConfiguration.java

@@ -24,6 +24,8 @@ import com.fasterxml.jackson.annotation.JsonTypeInfo;
 import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
 import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlRootElement;
 import io.github.dsheirer.audio.broadcast.broadcastify.BroadcastifyCallConfiguration;
+import io.github.dsheirer.audio.broadcast.rdioscanner.RdioScannerConfiguration;
+import io.github.dsheirer.audio.broadcast.openmhz.OpenMHzConfiguration;
 import io.github.dsheirer.audio.broadcast.icecast.IcecastConfiguration;
 import io.github.dsheirer.audio.broadcast.shoutcast.v1.ShoutcastV1Configuration;
 import io.github.dsheirer.audio.broadcast.shoutcast.v2.ShoutcastV2Configuration;
@@ -46,6 +48,8 @@ import java.net.SocketAddress;
 @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = "type")
 @JsonSubTypes({
     @JsonSubTypes.Type(value = BroadcastifyCallConfiguration.class, name="broadcastifyCallConfiguration"),
+    @JsonSubTypes.Type(value = RdioScannerConfiguration.class, name="RdioScannerConfiguration"),
+    @JsonSubTypes.Type(value = OpenMHzConfiguration.class, name="OpenMHzConfiguration"),
     @JsonSubTypes.Type(value = IcecastConfiguration.class, name="icecastConfiguration"),
     @JsonSubTypes.Type(value = ShoutcastV1Configuration.class, name="shoutcastV1Configuration"),
     @JsonSubTypes.Type(value = ShoutcastV2Configuration.class, name="shoutcastV2Configuration"),

src/main/java/io/github/dsheirer/audio/broadcast/BroadcastFactory.java

@@ -22,6 +22,12 @@ import io.github.dsheirer.alias.AliasModel;
 import io.github.dsheirer.audio.broadcast.broadcastify.BroadcastifyCallBroadcaster;
 import io.github.dsheirer.audio.broadcast.broadcastify.BroadcastifyCallConfiguration;
 import io.github.dsheirer.audio.broadcast.broadcastify.BroadcastifyFeedConfiguration;
+import io.github.dsheirer.audio.broadcast.rdioscanner.RdioScannerBroadcaster;
+import io.github.dsheirer.audio.broadcast.rdioscanner.RdioScannerConfiguration;
+import io.github.dsheirer.audio.broadcast.rdioscanner.RdioScannerFeedConfiguration;
+import io.github.dsheirer.audio.broadcast.openmhz.OpenMHzBroadcaster;
+import io.github.dsheirer.audio.broadcast.openmhz.OpenMHzConfiguration;
+import io.github.dsheirer.audio.broadcast.openmhz.OpenMHzFeedConfiguration;
 import io.github.dsheirer.audio.broadcast.icecast.IcecastHTTPAudioBroadcaster;
 import io.github.dsheirer.audio.broadcast.icecast.IcecastHTTPConfiguration;
 import io.github.dsheirer.audio.broadcast.icecast.IcecastTCPAudioBroadcaster;
@@ -61,6 +67,12 @@ public class BroadcastFactory
                 case BROADCASTIFY_CALL:
                     return new BroadcastifyCallBroadcaster((BroadcastifyCallConfiguration)configuration,
                             inputAudioFormat, mp3Setting, aliasModel);
+                case RDIOSCANNER_CALL:
+                    return new RdioScannerBroadcaster((RdioScannerConfiguration)configuration,
+                            inputAudioFormat, mp3Setting, aliasModel);
+                case OPENMHZ:
+                    return new OpenMHzBroadcaster((OpenMHzConfiguration)configuration,
+                        inputAudioFormat, mp3Setting, aliasModel);
                 case BROADCASTIFY:
                     return new IcecastTCPAudioBroadcaster((BroadcastifyFeedConfiguration) configuration,
                             inputAudioFormat, mp3Setting, aliasModel);
@@ -99,8 +111,12 @@ public class BroadcastFactory
         {
             case BROADCASTIFY_CALL:
                 return new BroadcastifyCallConfiguration(format);
+            case RDIOSCANNER_CALL:
+                return new RdioScannerConfiguration(format);
             case BROADCASTIFY:
                 return new BroadcastifyFeedConfiguration(format);
+            case OPENMHZ:
+                return new OpenMHzConfiguration(format);
             case ICECAST_HTTP:
                 return new IcecastHTTPConfiguration(format);
             case ICECAST_TCP:

src/main/java/io/github/dsheirer/audio/broadcast/BroadcastServerType.java

@@ -31,6 +31,8 @@ public enum BroadcastServerType
     BROADCASTIFY_CALL("Broadcastify Call", "images/broadcastify.png"),
 
     ICECAST_HTTP("Icecast 2 (v2.4+)", "images/icecast.png"),
+    RDIOSCANNER_CALL("Rdio Scanner", "images/rdioscanner.png"),
+    OPENMHZ("OpenMHz", "images/openmhz.png"),
     ICECAST_TCP("Icecast (v2.3)", "images/icecast.png"),
     SHOUTCAST_V1("Shoutcast v1.x", "images/shoutcast.png"),
     SHOUTCAST_V2("Shoutcast v2.x", "images/shoutcast.png"),

src/main/java/io/github/dsheirer/audio/broadcast/broadcastify/BroadcastifyCallBroadcaster.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -38,9 +38,6 @@ import io.github.dsheirer.identifier.patch.PatchGroupIdentifier;
 import io.github.dsheirer.identifier.radio.RadioIdentifier;
 import io.github.dsheirer.identifier.talkgroup.TalkgroupIdentifier;
 import io.github.dsheirer.util.ThreadPool;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.net.URI;
@@ -48,12 +45,13 @@ import java.net.http.HttpClient;
 import java.net.http.HttpRequest;
 import java.net.http.HttpResponse;
 import java.time.Duration;
-import java.util.List;
 import java.util.Queue;
 import java.util.concurrent.CompletionException;
 import java.util.concurrent.LinkedTransferQueue;
 import java.util.concurrent.ScheduledFuture;
 import java.util.concurrent.TimeUnit;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Audio broadcaster to push completed audio recordings to the Broadcastify call push API.
@@ -475,7 +473,11 @@ public class BroadcastifyCallBroadcaster extends AbstractAudioBroadcaster<Broadc
 
         StringBuilder sb = new StringBuilder();
         sb.append(patchGroup.getPatchGroup().getValue().toString());
-        for(TalkgroupIdentifier patched: patchGroup.getPatchedGroupIdentifiers())
+        for(TalkgroupIdentifier patched: patchGroup.getPatchedTalkgroupIdentifiers())
+        {
+            sb.append(",").append(patched.getValue());
+        }
+        for(RadioIdentifier patched: patchGroup.getPatchedRadioIdentifiers())
         {
             sb.append(",").append(patched.getValue());
         }

src/main/java/io/github/dsheirer/audio/broadcast/openmhz/FormField.java

@@ -0,0 +1,50 @@
+/*
+ * *****************************************************************************
+ *  Copyright (C) 2014-2020 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+ package io.github.dsheirer.audio.broadcast.openmhz;
+
+ /**
+  * HTTP headers used for posting to Rdio Scanner API
+  */
+ public enum FormField
+ {
+     CALL("call"),
+     FREQ("freq"),
+     START_TIME("start_time"),
+     STOP_TIME("stop_time"),
+     CALL_LENGTH("call_length"),
+     TALKGROUP_NUM("talkgroup_num"),
+     EMERGENCY("emergency"),
+     API_KEY("api_key"),
+     SOURCE_LIST("source_list"),
+     FREQ_LIST("freq_list"),
+     PATCHES("patches");
+
+     private String mHeader;
+
+     FormField(String header)
+     {
+         mHeader = header;
+     }
+
+     public String getHeader()
+     {
+         return mHeader;
+     }
+ }

src/main/java/io/github/dsheirer/audio/broadcast/openmhz/OpenMHzBroadcaster.java

@@ -0,0 +1,634 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2022 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+ package io.github.dsheirer.audio.broadcast.openmhz;
+
+ import com.google.common.net.HttpHeaders;
+ import com.google.common.base.Joiner;
+ import io.github.dsheirer.alias.Alias;
+ import io.github.dsheirer.alias.AliasList;
+ import io.github.dsheirer.alias.AliasModel;
+ import io.github.dsheirer.audio.broadcast.AbstractAudioBroadcaster;
+ import io.github.dsheirer.audio.broadcast.AudioRecording;
+ import io.github.dsheirer.audio.broadcast.BroadcastEvent;
+ import io.github.dsheirer.audio.broadcast.BroadcastState;
+ import io.github.dsheirer.audio.convert.InputAudioFormat;
+ import io.github.dsheirer.audio.convert.MP3Setting;
+ import io.github.dsheirer.gui.playlist.radioreference.RadioReferenceDecoder;
+ import io.github.dsheirer.identifier.Form;
+ import io.github.dsheirer.identifier.Identifier;
+ import io.github.dsheirer.identifier.IdentifierClass;
+ import io.github.dsheirer.identifier.MutableIdentifierCollection;
+ import io.github.dsheirer.identifier.Role;
+ import io.github.dsheirer.identifier.configuration.ConfigurationLongIdentifier;
+ import io.github.dsheirer.identifier.patch.PatchGroup;
+ import io.github.dsheirer.identifier.patch.PatchGroupIdentifier;
+ import io.github.dsheirer.identifier.radio.RadioIdentifier;
+ import io.github.dsheirer.identifier.talkgroup.TalkgroupIdentifier;
+ import io.github.dsheirer.util.ThreadPool;
+ import org.slf4j.Logger;
+ import org.slf4j.LoggerFactory;
+
+ import java.io.File;
+ import java.nio.file.Files;
+ import java.io.FileInputStream;
+ import java.io.FileNotFoundException;
+ import java.io.IOException;
+ import java.io.PrintWriter;
+ import java.io.BufferedReader;
+ import java.io.InputStreamReader;
+ import java.io.OutputStreamWriter;
+ import java.net.URI;
+ import java.net.URL;
+ import java.net.URLConnection;
+ import java.net.http.HttpClient;
+ import java.net.http.HttpRequest;
+ import java.net.http.HttpResponse;
+ import java.time.Duration;
+ import java.util.List;
+ import java.util.Queue;
+ import java.util.concurrent.CompletionException;
+ import java.util.concurrent.LinkedTransferQueue;
+ import java.util.concurrent.ScheduledFuture;
+ import java.util.concurrent.TimeUnit;
+
+
+ /**
+  * Audio broadcaster to push completed audio recordings to the OpenMHz call upload API.
+  *
+  */
+ public class OpenMHzBroadcaster extends AbstractAudioBroadcaster<OpenMHzConfiguration>
+ {
+     private final static Logger mLog = LoggerFactory.getLogger(OpenMHzBroadcaster.class);
+
+     private static final String ENCODING_TYPE_MP3 = "mp3";
+     private static final String MULTIPART_TYPE = "multipart";
+     private static final String DEFAULT_SUBTYPE = "form-data";
+     private static final String MULTIPART_FORM_DATA = MULTIPART_TYPE + "/" + DEFAULT_SUBTYPE;
+     private static final String APPLICATION_FORM_URLENCODED = "application/x-www-form-urlencoded";
+     private Queue<AudioRecording> mAudioRecordingQueue = new LinkedTransferQueue<>();
+     private ScheduledFuture<?> mAudioRecordingProcessorFuture;
+     private HttpClient mHttpClient = HttpClient.newBuilder()
+         .version(HttpClient.Version.HTTP_2)
+         .followRedirects(HttpClient.Redirect.NORMAL)
+         .connectTimeout(Duration.ofSeconds(20))
+         .build();
+     private long mLastConnectionAttempt;
+     private long mConnectionAttemptInterval = 5000; //Every 5 seconds
+     private AliasModel mAliasModel;
+
+     /**
+      * Constructs an instance of the broadcaster
+      * @param config to use
+      * @param aliasModel for access to aliases
+      */
+     public OpenMHzBroadcaster(OpenMHzConfiguration config, InputAudioFormat inputAudioFormat,
+                                        MP3Setting mp3Setting, AliasModel aliasModel)
+     {
+         super(config);
+         mAliasModel = aliasModel;
+     }
+
+     /**
+      * Starts the audio recording processor thread
+      */
+     @Override
+     public void start()
+     {
+         setBroadcastState(BroadcastState.CONNECTING);
+         String response = testConnection(getBroadcastConfiguration());
+         mLastConnectionAttempt = System.currentTimeMillis();
+
+         /**
+          * OpenMHz API does not currently expose a test method.
+          * TODO: FIX THIS
+          */
+         if(response == "OK")// && response.toLowerCase().startsWith("<head><title>502 bad gateway</title></head>"))
+         {
+             setBroadcastState(BroadcastState.CONNECTED);
+         }
+         else
+         {
+             mLog.error("Error connecting to OpenMHz server on startup [" + response + "]");
+             setBroadcastState(BroadcastState.ERROR);
+         }
+
+         if(mAudioRecordingProcessorFuture == null)
+         {
+             mAudioRecordingProcessorFuture = ThreadPool.SCHEDULED.scheduleAtFixedRate(new AudioRecordingProcessor(),
+                 0, 500, TimeUnit.MILLISECONDS);
+         }
+     }
+
+     /**
+      * Stops the audio recording processor thread
+      */
+     @Override
+     public void stop()
+     {
+         if(mAudioRecordingProcessorFuture != null)
+         {
+             mAudioRecordingProcessorFuture.cancel(true);
+             mAudioRecordingProcessorFuture = null;
+             dispose();
+             setBroadcastState(BroadcastState.DISCONNECTED);
+         }
+     }
+
+     /**
+      * Prepares for disposal
+      */
+     @Override
+     public void dispose()
+     {
+         AudioRecording audioRecording = mAudioRecordingQueue.poll();
+
+         while(audioRecording != null)
+         {
+             audioRecording.removePendingReplay();
+             audioRecording = mAudioRecordingQueue.poll();
+         }
+     }
+
+     /**
+      * Indicates if this broadcaster continues to have successful connections to and transactions with the remote
+      * server.  If there is a connectivity or other issue, the broadcast state is set to temporary error and
+      * the audio processor thread will persistently invoke this method to attempt a reconnect.
+      *
+      * OpenMHz does not have a test API endpoint, so we look for the incomplete call response.
+      */
+     private boolean connected()
+     {
+         if(getBroadcastState() != BroadcastState.CONNECTED &&
+             (System.currentTimeMillis() - mLastConnectionAttempt > mConnectionAttemptInterval))
+         {
+             setBroadcastState(BroadcastState.CONNECTING);
+
+             String response = testConnection(getBroadcastConfiguration());
+             mLastConnectionAttempt = System.currentTimeMillis();
+
+             if(response != null && response == "200")
+             {
+                 setBroadcastState(BroadcastState.CONNECTED);
+             }
+             else
+             {
+                 setBroadcastState(BroadcastState.ERROR);
+             }
+         }
+
+         return getBroadcastState() == BroadcastState.CONNECTED;
+     }
+
+     @Override
+     public int getAudioQueueSize()
+     {
+         return mAudioRecordingQueue.size();
+     }
+
+     @Override
+     public void receive(AudioRecording audioRecording)
+     {
+         mAudioRecordingQueue.offer(audioRecording);
+         broadcast(new BroadcastEvent(this, BroadcastEvent.Event.BROADCASTER_QUEUE_CHANGE));
+     }
+
+     /**
+      * Indicates if the audio recording is non-null and not too old, meaning that the age of the recording has not
+      * exceeded the max age value indicated in the broadcast configuration.  Audio recordings that are too old will be
+      * deleted to ensure that the in-memory queue size doesn't blow up.
+      * @param audioRecording to test
+      * @return true if the recording is valid
+      */
+     private boolean isValid(AudioRecording audioRecording)
+     {
+         return audioRecording != null && System.currentTimeMillis() - audioRecording.getStartTime() <=
+             getBroadcastConfiguration().getMaximumRecordingAge();
+     }
+
+     /**
+      * Processes any enqueued audio recordings. This method employs asynchronous
+      * interaction with the server, so multiple audio recording uploads can occur simultaneously.
+      */
+     private void processRecordingQueue()
+     {
+
+
+         while(connected() && !mAudioRecordingQueue.isEmpty())
+         {
+             final AudioRecording audioRecording = mAudioRecordingQueue.poll();
+             broadcast(new BroadcastEvent(this, BroadcastEvent.Event.BROADCASTER_QUEUE_CHANGE));
+
+             if(isValid(audioRecording) && audioRecording.getRecordingLength() > 0)
+             {
+                 int durationSeconds = (int)(audioRecording.getRecordingLength() / 1E3f);
+                 long timestampSeconds = (int)(audioRecording.getStartTime() / 1E3);
+                 String talkgroup = getTo(audioRecording);
+                 String radioId = getFrom(audioRecording);
+                 Long frequency = getFrequency(audioRecording);
+                 String patches = getPatches(audioRecording);
+                 String talkgroupLabel = getTalkgroupLabel(audioRecording);
+                 String talkgroupGroup = getTalkgroupGroup(audioRecording);
+                 String systemLabel = getSystemLabel(audioRecording);
+
+                 try
+                 {
+                     byte[] audioBytes = null;
+
+                     try
+                     {
+                         audioBytes = Files.readAllBytes(audioRecording.getPath());
+                     }
+                     catch(IOException e)
+                     {
+                         mLog.error("OpenMHz - audio recording file not found - ignoring upload");
+                     }
+
+                     if(audioBytes != null)
+                     {
+                        String uri = getBroadcastConfiguration().getHost() + "/" + getBroadcastConfiguration().getSystemName() + "/upload";
+
+                         OpenMHzBuilder bodyBuilder = new OpenMHzBuilder();
+                             bodyBuilder
+                             .addFile(audioBytes)
+                             .addPart(FormField.FREQ, frequency)
+                             .addPart(FormField.START_TIME, timestampSeconds)
+                             .addPart(FormField.STOP_TIME, timestampSeconds)
+                             .addPart(FormField.CALL_LENGTH, durationSeconds)
+                             .addPart(FormField.TALKGROUP_NUM, talkgroup)
+                             .addPart(FormField.EMERGENCY, 0)
+                             .addPart(FormField.API_KEY, getBroadcastConfiguration().getApiKey())
+                             // For future use if OpenMHz supports patch information
+                             //.addPart(FormField.PATCHES, patches)
+                             .addPart(FormField.SOURCE_LIST, "[{ \"pos\": 0.00, \"src\": " + radioId + "}]");
+
+                         HttpRequest fileRequest = HttpRequest.newBuilder()
+                             .uri(URI.create(uri))
+                             .header(HttpHeaders.CONTENT_TYPE, MULTIPART_FORM_DATA + "; boundary=" + bodyBuilder.getBoundary())
+                             .header(HttpHeaders.USER_AGENT, "sdrtrunk")
+                             .POST(bodyBuilder.build())
+                             .build();
+
+                         mHttpClient.sendAsync(fileRequest, HttpResponse.BodyHandlers.ofString())
+                             .whenComplete((fileResponse, throwable1) -> {
+                                 if(throwable1 != null || fileResponse.statusCode() != 200)
+                                 {
+                                     if(throwable1 instanceof IOException || throwable1 instanceof CompletionException)
+                                     {
+                                         //We get socket reset exceptions occasionally when the remote server doesn't
+                                         //fully read our request and immediately responds.
+                                         setBroadcastState(BroadcastState.TEMPORARY_BROADCAST_ERROR);
+                                         mLog.error("OpenMHz API file upload fail [" +
+                                             fileResponse.statusCode() + "] response [" +
+                                             fileResponse.body() + "]");
+                                     }
+                                     else
+                                     {
+                                         setBroadcastState(BroadcastState.TEMPORARY_BROADCAST_ERROR);
+                                         mLog.error("OpenMHz API file upload fail [" +
+                                             fileResponse.statusCode() + "] response [" +
+                                             fileResponse.body() + "]");
+                                     }
+
+                                     incrementErrorAudioCount();
+                                     broadcast(new BroadcastEvent(OpenMHzBroadcaster.this,
+                                         BroadcastEvent.Event.BROADCASTER_ERROR_COUNT_CHANGE));
+                                 }
+                                 else
+                                 {
+
+                                     if(fileResponse.statusCode() == 200)
+                                     {
+                                         incrementStreamedAudioCount();
+                                         broadcast(new BroadcastEvent(OpenMHzBroadcaster.this,
+                                             BroadcastEvent.Event.BROADCASTER_STREAMED_COUNT_CHANGE)); 
+                                         audioRecording.removePendingReplay(); 
+                                     }
+                                     else
+                                     {
+                                         setBroadcastState(BroadcastState.TEMPORARY_BROADCAST_ERROR);
+                                         mLog.error("OpenMHz API file upload fail [" +
+                                             fileResponse.statusCode() + "] response [" +
+                                             fileResponse.body() + "]");
+                                     }
+
+
+                                 }
+
+                             });
+                     }
+                     else
+                     {
+                         //Register an error for the file not found exception
+                         mLog.error("OpenMHz API - upload file not found [" +
+                             audioRecording.getPath().toString() + "]");
+                         incrementErrorAudioCount();
+                         broadcast(new BroadcastEvent(OpenMHzBroadcaster.this,
+                             BroadcastEvent.Event.BROADCASTER_ERROR_COUNT_CHANGE));
+                         audioRecording.removePendingReplay();
+                     }
+                 }
+                 catch(Exception e)
+                 {
+                     mLog.error("Unknown Error", e);
+                     setBroadcastState(BroadcastState.ERROR);
+                     incrementErrorAudioCount();
+                     broadcast(new BroadcastEvent(this, BroadcastEvent.Event.BROADCASTER_ERROR_COUNT_CHANGE));
+                     audioRecording.removePendingReplay();
+                 }
+             }
+         }
+
+         //If we're not connected and there are recordings in the queue, check the recording at the head of the queue
+         // and start age-off once the recordings become too old.  The recordings should be time ordered in the queue.
+         AudioRecording audioRecording = mAudioRecordingQueue.peek();
+
+         while(audioRecording != null)
+         {
+             if(isValid(audioRecording))
+             {
+                 return;
+             }
+             else
+             {
+                 //Remove the recording from the queue, remove a replay, and peek at the next recording in the queue
+                 mAudioRecordingQueue.poll();
+                 audioRecording.removePendingReplay();
+                 incrementAgedOffAudioCount();
+                 broadcast(new BroadcastEvent(this, BroadcastEvent.Event.BROADCASTER_AGED_OFF_COUNT_CHANGE));
+                 audioRecording = mAudioRecordingQueue.peek();
+             }
+         }
+     }
+
+     /**
+      * Creates a frequency value from the audio recording identifier collection.
+      */
+     private static Long getFrequency(AudioRecording audioRecording)
+     {
+         Identifier identifier = audioRecording.getIdentifierCollection().getIdentifier(IdentifierClass.CONFIGURATION,
+             Form.CHANNEL_FREQUENCY, Role.ANY);
+
+         if(identifier instanceof ConfigurationLongIdentifier)
+         {
+             Long value = ((ConfigurationLongIdentifier)identifier).getValue();
+
+             if(value != null)
+             {
+                 return value;
+             }
+         }
+
+         return Long.valueOf(0);
+     }
+
+     /**
+      * Creates a formatted string with the FROM identifier or uses a default of zero(0)
+      */
+     private static String getFrom(AudioRecording audioRecording)
+     {
+         for(Identifier identifier: audioRecording.getIdentifierCollection().getIdentifiers(Role.FROM))
+         {
+             if(identifier instanceof RadioIdentifier)
+             {
+                 return ((RadioIdentifier)identifier).getValue().toString();
+             }
+         }
+
+         return "0";
+     }
+
+     /**
+      * Creates a formatted string with the TO identifiers or uses a default of zero (0)
+      * 
+      */
+     private static String getTo(AudioRecording audioRecording)
+     {
+         Identifier identifier = audioRecording.getIdentifierCollection().getToIdentifier();
+
+         if(identifier instanceof PatchGroupIdentifier patchGroupIdentifier)
+         {
+             return patchGroupIdentifier.getValue().getPatchGroup().getValue().toString();
+         }
+         else if(identifier instanceof TalkgroupIdentifier talkgroupIdentifier)
+         {
+             return String.valueOf(RadioReferenceDecoder.convertToRadioReferenceTalkgroup(talkgroupIdentifier.getValue(),
+                     talkgroupIdentifier.getProtocol()));
+         }
+         else if(identifier instanceof RadioIdentifier radioIdentifier)
+         {
+             return radioIdentifier.getValue().toString();
+         }
+
+         return "0";
+     }
+
+     /**
+      * Creates a formatted string with the Talkgroup Label from the Audio Recording Alias
+      * If this is a PatchGroup we return only the first label as the primary talkgroup label.
+      * 
+      */
+     private String getTalkgroupLabel(AudioRecording audioRecording)
+     {
+
+         AliasList aliasList = mAliasModel.getAliasList(audioRecording.getIdentifierCollection());
+         Identifier identifier = audioRecording.getIdentifierCollection().getToIdentifier();
+
+         StringBuilder sb = new StringBuilder();
+         if(identifier != null)
+         {
+             List<Alias> aliases = aliasList.getAliases(identifier);
+             if(!aliases.isEmpty())
+             {
+                 sb.append(aliases.get(0));
+             }
+
+         }
+
+         return sb.toString();
+     }
+
+     /**
+      * Creates a formatted string with the Talkgroup Group from the Audio Recording Alias
+      * If this is a PatchGroup we return only the first group as the primary talkgroup group.
+      * 
+      */
+     private String getTalkgroupGroup(AudioRecording audioRecording)
+     {
+
+         AliasList aliasList = mAliasModel.getAliasList(audioRecording.getIdentifierCollection());
+         Identifier identifier = audioRecording.getIdentifierCollection().getToIdentifier();
+
+         StringBuilder sb = new StringBuilder();
+         if(identifier != null)
+         {
+             List<Alias> aliases = aliasList.getAliases(identifier);
+             if(!aliases.isEmpty())
+             {
+                 sb.append(aliases.get(0).getGroup());
+             }
+         }
+
+         return sb.toString();
+     }
+
+     /**
+      * Creates a formatted string with the System Label from the Audio Recording Alias
+      * If this is a PatchGroup we return only the first sytem as the primary talkgroup system.
+      * 
+      */
+     private String getSystemLabel(AudioRecording audioRecording)
+     {
+         List<Identifier> systems = audioRecording.getIdentifierCollection().getIdentifiers(Form.SYSTEM);
+
+         StringBuilder sb = new StringBuilder();
+         if(!systems.isEmpty())
+         {
+            sb.append(systems.get(0));
+         }
+
+         return sb.toString();
+     }
+
+    /**
+     * Creates a formatted string with the patched talkgroups
+     */
+    public static String getPatches(AudioRecording audioRecording)
+    {
+        Identifier identifier = audioRecording.getIdentifierCollection().getToIdentifier();
+
+        if(identifier instanceof PatchGroupIdentifier patchGroupIdentifier)
+        {
+            PatchGroup patchGroup = patchGroupIdentifier.getValue();
+
+            StringBuilder sb = new StringBuilder();
+            sb.append("[");
+            
+            sb.append(patchGroup.getPatchGroup().getValue().toString());
+            
+            for(TalkgroupIdentifier patched: patchGroup.getPatchedTalkgroupIdentifiers())
+            {
+                sb.append(",").append(patched.getValue());
+            }
+
+            for(RadioIdentifier patched: patchGroup.getPatchedRadioIdentifiers())
+            {
+                sb.append(",").append(patched.getValue());
+            }
+            
+            sb.append("]");
+            return sb.toString();
+        }
+
+        return "[]";
+    }
+
+     /**
+      * Tests both the connection and configuration against the OpenMHz Call API service
+      * @param configuration containing API key and system id
+      * @return error string or null if test is successful
+      */
+     public static String testConnection(OpenMHzConfiguration configuration)
+     {
+         String uri = configuration.getHost() + "/" + configuration.getSystemName() + "/authorize";
+
+         HttpClient httpClient = HttpClient.newBuilder()
+             .version(HttpClient.Version.HTTP_1_1)
+             .followRedirects(HttpClient.Redirect.NORMAL)
+             .connectTimeout(Duration.ofSeconds(20))
+             .build();
+
+         HttpRequest request = HttpRequest.newBuilder()
+             .uri(URI.create(uri))
+             .header(HttpHeaders.CONTENT_TYPE, APPLICATION_FORM_URLENCODED)
+             .header(HttpHeaders.USER_AGENT, "sdrtrunk")
+             .POST(HttpRequest.BodyPublishers.ofString("api_key="+configuration.getApiKey()))
+             .build();
+
+         HttpResponse.BodyHandler<String> responseHandler = HttpResponse.BodyHandlers.ofString();
+
+         try
+         {
+             HttpResponse<String> response = httpClient.send(request, responseHandler);
+             String responseBody = response.body();
+             if (response.statusCode() == 200)
+             {
+                return "OK";
+             }
+             else if(response.statusCode() == 403)
+             {
+                return "Invalid API Key";
+             }
+             else if(response.statusCode() == 500)
+             {
+                return "Invalid System Name";
+             }
+
+             return "No Response";
+         }
+         catch(Exception e)
+         {
+             return e.getLocalizedMessage();
+         }
+     }
+
+     public class AudioRecordingProcessor implements Runnable
+     {
+         @Override
+         public void run()
+         {
+             processRecordingQueue();
+         }
+     }
+
+     public static void main(String[] args)
+     {
+         mLog.debug("Starting ...");
+
+         OpenMHzConfiguration config = new OpenMHzConfiguration();
+         config.setHost("https://api.OpenMHz.com/call-upload-dev");
+         config.setApiKey("c33aae37-8572-11ea-bd8b-0ecc8ab9ccec");
+         config.setSystemName("systemx");
+
+         String response = testConnection(config);
+         mLog.error("Response: " + response);
+
+         if(response == "OK")
+         {
+             mLog.debug("Test Successful!");
+         }
+         else
+         {
+             if(response.contains("Invalid API Key"))
+             {
+                 mLog.error("Invalid API Key");
+             }
+             else if(response.contains("Invalid System Name"))
+             {
+                 mLog.error("Invalid System Name");
+             }
+             else
+             {
+                 mLog.debug("Response: " + response);
+             }
+         }
+
+         mLog.debug("Finished!");
+     }
+ }

src/main/java/io/github/dsheirer/audio/broadcast/openmhz/OpenMHzBuilder.java

@@ -0,0 +1,216 @@
+/*
+ * *****************************************************************************
+ *  Copyright (C) 2014-2020 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+ package io.github.dsheirer.audio.broadcast.openmhz;
+
+ import java.net.http.HttpRequest;
+ import java.util.ArrayList;
+ import java.util.List;
+ import java.lang.*;
+ import java.io.ByteArrayOutputStream;
+ import java.io.IOException;
+
+ /**
+  * Builder for an HTTP body publisher to produce a OpenMHz call event
+  */
+ public class OpenMHzBuilder
+ {
+     private static final String DASH_DASH = "--";
+     private static final String BOUNDARY = "--sdrtrunk-sdrtrunk-sdrtrunk";
+     private List<Part> mParts = new ArrayList<>();
+     private byte[] audioBytes = null; 
+
+     /**
+      * Constructs an instance
+      */
+     public OpenMHzBuilder()
+     {
+     }
+
+     /**
+      * Access the static multi-part boundary string
+      */
+     public String getBoundary()
+     {
+         return BOUNDARY;
+     }
+
+     /**
+      * Adds a Audio bytes part to the call
+      */
+     public OpenMHzBuilder addFile(byte[] value)
+     {
+         audioBytes = value;
+         return this;
+     }
+
+     /**
+      * Adds a string part to the call
+      */
+     public OpenMHzBuilder addPart(FormField key, String value)
+     {
+         if(key != null && value != null)
+         {
+             mParts.add(new Part(key.getHeader(), value));
+         }
+
+         return this;
+     }
+
+     /**
+      * Adds a number part to the call
+      */
+     public OpenMHzBuilder addPart(FormField key, Number value)
+     {
+         if(key != null && value != null)
+         {
+             mParts.add(new Part(key.getHeader(), value.toString()));
+         }
+
+         return this;
+     }
+
+     /**
+      * Creates a form-data item
+      */
+     private static String formatPart(Part part, String boundary)
+     {
+         StringBuilder sb = new StringBuilder();
+         sb.append(DASH_DASH).append(boundary).append("\r\n");
+         sb.append("Content-Disposition: form-data; name=\"").append(part.mKey).append("\"\r\n\r\n");
+         sb.append(part.getValue()).append("\r\n");
+         return sb.toString();
+     }
+
+     /**
+      * Creates the audio file item
+      */
+     private String formatFilePart(String boundary)
+     {
+
+         if(audioBytes == null)
+         {
+             return "";
+         }
+         StringBuilder sb= new StringBuilder();
+         sb.append(DASH_DASH).append(boundary).append("\r\n");
+         sb.append("Content-Disposition: form-data; name=\"").append("call").append("\"; filename=\"audio.mp3\"\r\n\r\n");
+         return sb.toString();
+
+     }
+
+     /**
+      * Creates the boundary closing item
+      */
+     private static String getClosingBoundary(String boundary)
+     {
+         StringBuilder sb = new StringBuilder();
+         sb.append(DASH_DASH).append(boundary).append(DASH_DASH).append("\r\n");
+         return sb.toString();
+     }
+
+     /**
+      * Creates a BodyPublisher for accessing the call form data
+      */
+     public HttpRequest.BodyPublisher build()
+     {
+         StringBuilder sb = new StringBuilder();
+
+         for(Part part: mParts)
+         {
+             sb.append(formatPart(part, BOUNDARY));
+         }
+
+         sb.append(formatFilePart(BOUNDARY));
+
+
+         /**
+         * We need to create a ByteArray consisting of the Sting "parts" and the audio file bytes
+         */
+         ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+
+         try
+         {
+
+             outputStream.write(sb.toString().getBytes());
+
+             if(audioBytes != null)
+             {
+                 outputStream.write(audioBytes);
+             }
+
+             sb = new StringBuilder();
+             sb.append("\r\n");
+             sb.append(getClosingBoundary(BOUNDARY));
+
+             outputStream.write(sb.toString().getBytes());
+         }
+         catch(IOException e)
+         {
+             //mLog.error("Rdio Scanner API - unable to create POST reqeust.");
+         }
+
+         return HttpRequest.BodyPublishers.ofByteArray(outputStream.toByteArray());
+     }
+
+     @Override
+     public String toString()
+     {
+         StringBuilder sb = new StringBuilder();
+
+         for(Part part: mParts)
+         {
+             sb.append(formatPart(part, BOUNDARY));
+         }
+
+         sb.append(getClosingBoundary(BOUNDARY));
+
+         return sb.toString();
+     }
+
+     /**
+      * Key:Value pair holder
+      */
+     public class Part
+     {
+         private String mKey;
+         private String mValue;
+
+         /**
+          * Constructs a new part
+          * @param key value
+          * @param value item
+          */
+         public Part(String key, String value)
+         {
+             mKey = key;
+             mValue = value;
+         }
+
+         public String getKey()
+         {
+             return mKey;
+         }
+
+         public String getValue()
+         {
+             return mValue;
+         }
+     }
+ }

src/main/java/io/github/dsheirer/audio/broadcast/openmhz/OpenMHzConfiguration.java

@@ -0,0 +1,139 @@
+/*
+ * *****************************************************************************
+ *  Copyright (C) 2014-2020 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+ package io.github.dsheirer.audio.broadcast.openmhz;
+
+ import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
+ import io.github.dsheirer.audio.broadcast.BroadcastConfiguration;
+ import io.github.dsheirer.audio.broadcast.BroadcastFormat;
+ import io.github.dsheirer.audio.broadcast.BroadcastServerType;
+ import javafx.beans.binding.Bindings;
+ import javafx.beans.property.BooleanProperty;
+ import javafx.beans.property.IntegerProperty;
+ import javafx.beans.property.SimpleBooleanProperty;
+ import javafx.beans.property.SimpleIntegerProperty;
+ import javafx.beans.property.SimpleStringProperty;
+ import javafx.beans.property.StringProperty;
+
+ /**
+  * Streaming configuration for Rdio Scanner API.
+  *
+  * Note: this API is not a streaming audio service, rather a completed call push service.  However, it fits nicely
+  * with the structure of the audio streaming subsystem in sdrtrunk
+  */
+ public class OpenMHzConfiguration extends BroadcastConfiguration
+ {
+    public static final String PRODUCTION_ENDPOINT = "https://api.openmhz.com";
+
+     private StringProperty mSystemName = new SimpleStringProperty();
+     private StringProperty mApiKey = new SimpleStringProperty();
+
+     /**
+      * Constructor for faster jackson
+      */
+     public OpenMHzConfiguration()
+     {
+         this(BroadcastFormat.MP3);
+     }
+
+     /**
+      * Public constructor.
+      * @param format to use for audio recording (MP3)
+      */
+     public OpenMHzConfiguration(BroadcastFormat format)
+     {
+         super(format);
+
+         if(getHost() == null)
+         {
+             setHost(PRODUCTION_ENDPOINT);
+         }
+
+         //The parent class binds this property, so we unbind it and rebind it here
+         mValid.unbind();
+         mValid.bind(Bindings.and(Bindings.and(Bindings.isNotNull(mSystemName), Bindings.isNotNull(mApiKey)),
+             Bindings.isNotNull(mHost)));
+     }
+
+     /**
+      * System ID as a property
+      */
+     public StringProperty systemIDProperty()
+     {
+         return mSystemName;
+     }
+
+     /**
+      * API key as a property
+      */
+     public StringProperty apiKeyProperty()
+     {
+         return mApiKey;
+     }
+
+     /**
+      * API Key
+      */
+     @JacksonXmlProperty(isAttribute = true, localName = "api_key")
+     public String getApiKey()
+     {
+         return mApiKey.get();
+     }
+
+     /**
+      * Sets the api key
+      * @param apiKey
+      */
+     public void setApiKey(String apiKey)
+     {
+         mApiKey.setValue(apiKey);
+     }
+
+     /**
+      * System name as provided by OpenMHz.com
+      */
+     @JacksonXmlProperty(isAttribute = true, localName = "system_name")
+     public String getSystemName()
+     {
+         return mSystemName.get();
+     }
+
+     /**
+      * Sets the system name provided by OpenMHz.com
+      */
+     public void setSystemName(String systemName)
+     {
+         mSystemName.set(systemName);
+     }
+
+     @JacksonXmlProperty(isAttribute = true, localName = "type", namespace = "http://www.w3.org/2001/XMLSchema-instance")
+     @Override
+     public BroadcastServerType getBroadcastServerType()
+     {
+         return BroadcastServerType.OPENMHZ;
+     }
+
+     @Override
+     public BroadcastConfiguration copyOf()
+     {
+         OpenMHzConfiguration copy = new OpenMHzConfiguration();
+         copy.setSystemName(getSystemName());
+         return copy;
+     }
+ }

src/main/java/io/github/dsheirer/audio/broadcast/openmhz/OpenMHzEditor.java

@@ -0,0 +1,233 @@
+/*
+ * *****************************************************************************
+ *  Copyright (C) 2014-2020 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+ package io.github.dsheirer.gui.playlist.streaming;
+
+ import io.github.dsheirer.audio.broadcast.BroadcastServerType;
+ import io.github.dsheirer.audio.broadcast.openmhz.OpenMHzBroadcaster;
+ import io.github.dsheirer.audio.broadcast.openmhz.OpenMHzConfiguration;
+ import io.github.dsheirer.gui.control.IntegerTextField;
+ import io.github.dsheirer.playlist.PlaylistManager;
+ import javafx.geometry.HPos;
+ import javafx.geometry.Insets;
+ import javafx.scene.control.Alert;
+ import javafx.scene.control.Button;
+ import javafx.scene.control.ButtonType;
+ import javafx.scene.control.Label;
+ import javafx.scene.control.TextField;
+ import javafx.scene.layout.GridPane;
+ import org.slf4j.Logger;
+ import org.slf4j.LoggerFactory;
+ import org.controlsfx.control.ToggleSwitch;
+
+ /**
+  * OpenMHz calls API configuration editor
+  */
+ public class OpenMHzEditor extends AbstractBroadcastEditor<OpenMHzConfiguration>
+ {
+     private final static Logger mLog = LoggerFactory.getLogger(OpenMHzEditor.class);
+     private TextField mSystemNameTextField;
+     private IntegerTextField mMaxAgeTextField;
+     private TextField mApiKeyTextField;
+     private TextField mHostTextField;
+     private GridPane mEditorPane;
+
+     /**
+      * Constructs an instance
+      * @param playlistManager for accessing the broadcast model
+      */
+     public OpenMHzEditor(PlaylistManager playlistManager)
+     {
+         super(playlistManager);
+     }
+
+     @Override
+     public void setItem(OpenMHzConfiguration item)
+     {
+         super.setItem(item);
+
+         getSystemNameTextField().setDisable(item == null);
+         getApiKeyTextField().setDisable(item == null);
+         getHostTextField().setDisable(item == null);
+         getMaxAgeTextField().setDisable(item == null);
+
+         if(item != null)
+         {
+             getSystemNameTextField().setText(item.getSystemName());
+             getApiKeyTextField().setText(item.getApiKey());
+             getHostTextField().setText(item.getHost());
+             getMaxAgeTextField().set((int)(item.getMaximumRecordingAge() / 1000));
+         }
+         else
+         {
+             getSystemNameTextField().setText(null);
+             getApiKeyTextField().setText(null);
+             getHostTextField().setText(null);
+             getMaxAgeTextField().set(0);
+         }
+
+         modifiedProperty().set(false);
+     }
+
+     @Override
+     public void dispose()
+     {
+     }
+
+     @Override
+     public void save()
+     {
+         if(getItem() != null)
+         {
+             getItem().setSystemName(getSystemNameTextField().getText());
+             getItem().setHost(getHostTextField().getText());
+             getItem().setApiKey(getApiKeyTextField().getText());
+             getItem().setMaximumRecordingAge(getMaxAgeTextField().get() * 1000);
+         }
+
+         super.save();
+     }
+
+     public BroadcastServerType getBroadcastServerType()
+     {
+         return BroadcastServerType.OPENMHZ;
+     }
+
+     protected GridPane getEditorPane()
+     {
+         if(mEditorPane == null)
+         {
+             mEditorPane = new GridPane();
+             mEditorPane.setPadding(new Insets(10, 5, 10,10));
+             mEditorPane.setVgap(10);
+             mEditorPane.setHgap(5);
+
+             int row = 0;
+
+             Label formatLabel = new Label("Format");
+             GridPane.setHalignment(formatLabel, HPos.RIGHT);
+             GridPane.setConstraints(formatLabel, 0, row);
+             mEditorPane.getChildren().add(formatLabel);
+
+             GridPane.setConstraints(getFormatField(), 1, row);
+             mEditorPane.getChildren().add(getFormatField());
+
+             Label enabledLabel = new Label("Enabled");
+             GridPane.setHalignment(enabledLabel, HPos.RIGHT);
+             GridPane.setConstraints(enabledLabel, 2, row);
+             mEditorPane.getChildren().add(enabledLabel);
+
+             GridPane.setConstraints(getEnabledSwitch(), 3, row);
+             mEditorPane.getChildren().add(getEnabledSwitch());
+
+             Label systemLabel = new Label("Name");
+             GridPane.setHalignment(systemLabel, HPos.RIGHT);
+             GridPane.setConstraints(systemLabel, 0, ++row);
+             mEditorPane.getChildren().add(systemLabel);
+
+             GridPane.setConstraints(getNameTextField(), 1, row);
+             mEditorPane.getChildren().add(getNameTextField());
+
+             Label apiKeyLabel = new Label("API Key");
+             GridPane.setHalignment(apiKeyLabel, HPos.RIGHT);
+             GridPane.setConstraints(apiKeyLabel, 0, ++row);
+             mEditorPane.getChildren().add(apiKeyLabel);
+
+             GridPane.setConstraints(getApiKeyTextField(), 1, row);
+             mEditorPane.getChildren().add(getApiKeyTextField());
+
+             Label systemNameLabel = new Label("System Short Name");
+             GridPane.setHalignment(systemNameLabel, HPos.RIGHT);
+             GridPane.setConstraints(systemNameLabel, 0, ++row);
+             mEditorPane.getChildren().add(systemNameLabel);
+
+             GridPane.setConstraints(getSystemNameTextField(), 1, row);
+             mEditorPane.getChildren().add(getSystemNameTextField());
+
+             Label hostLabel = new Label("OpenMHz Upload Server (API)");
+             GridPane.setHalignment(hostLabel, HPos.RIGHT);
+             GridPane.setConstraints(hostLabel, 0, ++row);
+             mEditorPane.getChildren().add(hostLabel);
+
+             GridPane.setConstraints(getHostTextField(), 1, row);
+             mEditorPane.getChildren().add(getHostTextField());
+
+             Label maxAgeLabel = new Label("Max Recording Age (seconds)");
+             GridPane.setHalignment(maxAgeLabel, HPos.RIGHT);
+             GridPane.setConstraints(maxAgeLabel, 0, ++row);
+             mEditorPane.getChildren().add(maxAgeLabel);
+
+             GridPane.setConstraints(getMaxAgeTextField(), 1, row);
+             mEditorPane.getChildren().add(getMaxAgeTextField());
+
+         }
+
+         return mEditorPane;
+     }
+
+     private IntegerTextField getMaxAgeTextField()
+     {
+         if(mMaxAgeTextField == null)
+         {
+             mMaxAgeTextField = new IntegerTextField();
+             mMaxAgeTextField.setDisable(true);
+             mMaxAgeTextField.textProperty().addListener(mEditorModificationListener);
+         }
+
+         return mMaxAgeTextField;
+     }
+
+     private TextField getHostTextField()
+     {
+         if(mHostTextField == null)
+         {
+             mHostTextField = new TextField();
+             mHostTextField.setDisable(true);
+             mHostTextField.textProperty().addListener(mEditorModificationListener);
+         }
+
+         return mHostTextField;
+     }
+
+     private TextField getApiKeyTextField()
+     {
+         if(mApiKeyTextField == null)
+         {
+             mApiKeyTextField = new TextField();
+             mApiKeyTextField.setDisable(true);
+             mApiKeyTextField.textProperty().addListener(mEditorModificationListener);
+         }
+
+         return mApiKeyTextField;
+     }
+
+     private TextField getSystemNameTextField()
+     {
+         if(mSystemNameTextField == null)
+         {
+             mSystemNameTextField = new TextField();
+             mSystemNameTextField.setDisable(true);
+             mSystemNameTextField.textProperty().addListener(mEditorModificationListener);
+         }
+
+         return mSystemNameTextField;
+     }
+
+
+ }

src/main/java/io/github/dsheirer/audio/broadcast/openmhz/OpenMHzFeedConfiguration.java

@@ -0,0 +1,126 @@
+/*
+ *
+ *  * ******************************************************************************
+ *  * Copyright (C) 2014-2020 Dennis Sheirer
+ *  *
+ *  * This program is free software: you can redistribute it and/or modify
+ *  * it under the terms of the GNU General Public License as published by
+ *  * the Free Software Foundation, either version 3 of the License, or
+ *  * (at your option) any later version.
+ *  *
+ *  * This program is distributed in the hope that it will be useful,
+ *  * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  * GNU General Public License for more details.
+ *  *
+ *  * You should have received a copy of the GNU General Public License
+ *  * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *  * *****************************************************************************
+ *
+ *
+ */
+package io.github.dsheirer.audio.broadcast.openmhz;
+
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
+import io.github.dsheirer.audio.broadcast.BroadcastConfiguration;
+import io.github.dsheirer.audio.broadcast.BroadcastFormat;
+import io.github.dsheirer.audio.broadcast.BroadcastServerType;
+import io.github.dsheirer.audio.broadcast.icecast.IcecastTCPConfiguration;
+import io.github.dsheirer.rrapi.type.UserFeedBroadcast;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class OpenMHzFeedConfiguration extends IcecastTCPConfiguration
+{
+    private final static Logger mLog = LoggerFactory.getLogger(OpenMHzFeedConfiguration.class);
+
+    private int mFeedID;
+
+    public OpenMHzFeedConfiguration()
+    {
+        //No-arg constructor for JAXB
+        this(BroadcastFormat.MP3);
+    }
+
+    /**
+     * OpenMHz configuration for Icecast 2.3.2 compatible servers
+     *
+     * @param format of output audio (MP3)
+     */
+    public OpenMHzFeedConfiguration(BroadcastFormat format)
+    {
+        super(format);
+
+        setBitRate(16);
+        setChannels(1);
+        setSampleRate(8000);
+        setInline(true);
+    }
+
+    public static OpenMHzFeedConfiguration from(UserFeedBroadcast userFeedBroadcast)
+    {
+        OpenMHzFeedConfiguration config = new OpenMHzFeedConfiguration(BroadcastFormat.MP3);
+        config.setName(userFeedBroadcast.getDescription());
+        config.setHost(userFeedBroadcast.getHostname());
+        config.setMountPoint(userFeedBroadcast.getMount());
+        config.setFeedID(userFeedBroadcast.getFeedId());
+        config.setPassword(userFeedBroadcast.getPassword());
+
+        try
+        {
+            config.setPort(Integer.parseInt(userFeedBroadcast.getPort()));
+        }
+        catch(Exception e)
+        {
+            mLog.error("Error creating Rdio Scanner configuration from radio reference user feed instance");
+        }
+
+        return config;
+    }
+
+    @Override
+    public BroadcastConfiguration copyOf()
+    {
+        OpenMHzFeedConfiguration copy = new OpenMHzFeedConfiguration(getBroadcastFormat());
+
+        //Broadcast Configuration Parameters
+        copy.setName(getName());
+        copy.setHost(getHost());
+        copy.setPort(getPort());
+        copy.setInline(getInline());
+        copy.setPassword(getPassword());
+        copy.setDelay(getDelay());
+        copy.setEnabled(false);
+
+        //Icecast Configuration Parameters
+        copy.setUserName(getUserName());
+        copy.setMountPoint(getMountPoint());
+        copy.setDescription(getDescription());
+        copy.setGenre(getGenre());
+        copy.setPublic(isPublic());
+        copy.setURL(getURL());
+
+        //OpenMHz Configuration Parameters
+        copy.setFeedID(getFeedID());
+
+        return copy;
+    }
+
+    @JacksonXmlProperty(isAttribute = true, localName = "type", namespace = "http://www.w3.org/2001/XMLSchema-instance")
+    @Override
+    public BroadcastServerType getBroadcastServerType()
+    {
+        return BroadcastServerType.OPENMHZ;
+    }
+
+    @JacksonXmlProperty(isAttribute = true, localName = "feed_id")
+    public int getFeedID()
+    {
+        return mFeedID;
+    }
+
+    public void setFeedID(int feedID)
+    {
+        mFeedID = feedID;
+    }
+}

src/main/java/io/github/dsheirer/audio/broadcast/rdioscanner/FormField.java

@@ -0,0 +1,56 @@
+/*
+ * *****************************************************************************
+ *  Copyright (C) 2014-2020 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.audio.broadcast.rdioscanner;
+
+/**
+ * HTTP headers used for posting to Rdio Scanner API
+ */
+public enum FormField
+{
+    AUDIO("audio"),
+    AUDIO_NAME("audioName"),
+    AUDIO_TYPE("audioType"),
+    DATE_TIME("dateTime"),
+    FREQUENCIES("frequencies"),
+    FREQUENCY("frequency"),
+    KEY("key"),
+    PATCHES("patches"),
+    SOURCE("source"),
+    SOURCES("sources"),
+    SYSTEM("system"),
+    SYSTEM_LABEL("systemLabel"),
+    TALKGROUP_ID("talkgroup"),
+    TALKGROUP_GROUP("talkgroupGroup"),
+    TALKGROUP_LABEL("talkgroupLabel"),
+    TALKGROUP_TAG("talkgroupTag"),
+    TEST("test");
+    
+    private String mHeader;
+
+    FormField(String header)
+    {
+        mHeader = header;
+    }
+
+    public String getHeader()
+    {
+        return mHeader;
+    }
+}

src/main/java/io/github/dsheirer/audio/broadcast/rdioscanner/RdioScannerBroadcaster.java

@@ -0,0 +1,618 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.audio.broadcast.rdioscanner;
+
+import com.google.common.net.HttpHeaders;
+import io.github.dsheirer.alias.Alias;
+import io.github.dsheirer.alias.AliasList;
+import io.github.dsheirer.alias.AliasModel;
+import io.github.dsheirer.audio.broadcast.AbstractAudioBroadcaster;
+import io.github.dsheirer.audio.broadcast.AudioRecording;
+import io.github.dsheirer.audio.broadcast.BroadcastEvent;
+import io.github.dsheirer.audio.broadcast.BroadcastState;
+import io.github.dsheirer.audio.convert.InputAudioFormat;
+import io.github.dsheirer.audio.convert.MP3Setting;
+import io.github.dsheirer.gui.playlist.radioreference.RadioReferenceDecoder;
+import io.github.dsheirer.identifier.Form;
+import io.github.dsheirer.identifier.Identifier;
+import io.github.dsheirer.identifier.IdentifierClass;
+import io.github.dsheirer.identifier.Role;
+import io.github.dsheirer.identifier.configuration.ConfigurationLongIdentifier;
+import io.github.dsheirer.identifier.patch.PatchGroup;
+import io.github.dsheirer.identifier.patch.PatchGroupIdentifier;
+import io.github.dsheirer.identifier.radio.RadioIdentifier;
+import io.github.dsheirer.identifier.talkgroup.TalkgroupIdentifier;
+import io.github.dsheirer.util.ThreadPool;
+import java.io.IOException;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.nio.file.Files;
+import java.time.Duration;
+import java.util.List;
+import java.util.Queue;
+import java.util.concurrent.CompletionException;
+import java.util.concurrent.LinkedTransferQueue;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+
+/**
+ * Audio broadcaster to push completed audio recordings to the Rdio Scanner call upload API.
+ *
+ */
+public class RdioScannerBroadcaster extends AbstractAudioBroadcaster<RdioScannerConfiguration>
+{
+    private final static Logger mLog = LoggerFactory.getLogger(RdioScannerBroadcaster.class);
+
+    private static final String ENCODING_TYPE_MP3 = "mp3";
+    private static final String MULTIPART_TYPE = "multipart";
+    private static final String DEFAULT_SUBTYPE = "form-data";
+    private static final String MULTIPART_FORM_DATA = MULTIPART_TYPE + "/" + DEFAULT_SUBTYPE;
+    private Queue<AudioRecording> mAudioRecordingQueue = new LinkedTransferQueue<>();
+    private ScheduledFuture<?> mAudioRecordingProcessorFuture;
+    private HttpClient mHttpClient = HttpClient.newBuilder()
+        .version(HttpClient.Version.HTTP_2)
+        .followRedirects(HttpClient.Redirect.NORMAL)
+        .connectTimeout(Duration.ofSeconds(20))
+        .build();
+    private long mLastConnectionAttempt;
+    private long mConnectionAttemptInterval = 5000; //Every 5 seconds
+    private AliasModel mAliasModel;
+
+    /**
+     * Constructs an instance of the broadcaster
+     * @param config to use
+     * @param aliasModel for access to aliases
+     */
+    public RdioScannerBroadcaster(RdioScannerConfiguration config, InputAudioFormat inputAudioFormat,
+                                       MP3Setting mp3Setting, AliasModel aliasModel)
+    {
+        super(config);
+        mAliasModel = aliasModel;
+    }
+
+    /**
+     * Starts the audio recording processor thread
+     */
+    @Override
+    public void start()
+    {
+        setBroadcastState(BroadcastState.CONNECTING);
+        String response = testConnection(getBroadcastConfiguration());
+        mLastConnectionAttempt = System.currentTimeMillis();
+
+        /**
+         * Rdio Scanner API does not currently expose a test method.
+         */
+        if(response != null && response.toLowerCase().startsWith("incomplete call data: no talkgroup"))
+        {
+            setBroadcastState(BroadcastState.CONNECTED);
+        }
+        else
+        {
+            mLog.error("Error connecting to Rdio Scanner server on startup [" + response + "]");
+            setBroadcastState(BroadcastState.ERROR);
+        }
+
+        if(mAudioRecordingProcessorFuture == null)
+        {
+            mAudioRecordingProcessorFuture = ThreadPool.SCHEDULED.scheduleAtFixedRate(new AudioRecordingProcessor(),
+                0, 500, TimeUnit.MILLISECONDS);
+        }
+    }
+
+    /**
+     * Stops the audio recording processor thread
+     */
+    @Override
+    public void stop()
+    {
+        if(mAudioRecordingProcessorFuture != null)
+        {
+            mAudioRecordingProcessorFuture.cancel(true);
+            mAudioRecordingProcessorFuture = null;
+            dispose();
+            setBroadcastState(BroadcastState.DISCONNECTED);
+        }
+    }
+
+    /**
+     * Prepares for disposal
+     */
+    @Override
+    public void dispose()
+    {
+        AudioRecording audioRecording = mAudioRecordingQueue.poll();
+
+        while(audioRecording != null)
+        {
+            audioRecording.removePendingReplay();
+            audioRecording = mAudioRecordingQueue.poll();
+        }
+    }
+
+    /**
+     * Indicates if this broadcaster continues to have successful connections to and transactions with the remote
+     * server.  If there is a connectivity or other issue, the broadcast state is set to temporary error and
+     * the audio processor thread will persistently invoke this method to attempt a reconnect.
+     *
+     * Rdio Scanner does not have a test API endpoint, so we look for the incomplete call response.
+     */
+    private boolean connected()
+    {
+        if(getBroadcastState() != BroadcastState.CONNECTED &&
+            (System.currentTimeMillis() - mLastConnectionAttempt > mConnectionAttemptInterval))
+        {
+            setBroadcastState(BroadcastState.CONNECTING);
+
+            String response = testConnection(getBroadcastConfiguration());
+            mLastConnectionAttempt = System.currentTimeMillis();
+
+            if(response != null && response.toLowerCase().startsWith("incomplete call data: no talkgroup"))
+            {
+                setBroadcastState(BroadcastState.CONNECTED);
+            }
+            else
+            {
+                setBroadcastState(BroadcastState.ERROR);
+            }
+        }
+
+        return getBroadcastState() == BroadcastState.CONNECTED;
+    }
+
+    @Override
+    public int getAudioQueueSize()
+    {
+        return mAudioRecordingQueue.size();
+    }
+
+    @Override
+    public void receive(AudioRecording audioRecording)
+    {
+        mAudioRecordingQueue.offer(audioRecording);
+        broadcast(new BroadcastEvent(this, BroadcastEvent.Event.BROADCASTER_QUEUE_CHANGE));
+    }
+
+    /**
+     * Indicates if the audio recording is non-null and not too old, meaning that the age of the recording has not
+     * exceeded the max age value indicated in the broadcast configuration.  Audio recordings that are too old will be
+     * deleted to ensure that the in-memory queue size doesn't blow up.
+     * @param audioRecording to test
+     * @return true if the recording is valid
+     */
+    private boolean isValid(AudioRecording audioRecording)
+    {
+        return audioRecording != null && System.currentTimeMillis() - audioRecording.getStartTime() <=
+            getBroadcastConfiguration().getMaximumRecordingAge();
+    }
+
+    /**
+     * Processes any enqueued audio recordings. This method employs asynchronous
+     * interaction with the server, so multiple audio recording uploads can occur simultaneously.
+     */
+    private void processRecordingQueue()
+    {
+
+        
+        while(connected() && !mAudioRecordingQueue.isEmpty())
+        {
+            final AudioRecording audioRecording = mAudioRecordingQueue.poll();
+            broadcast(new BroadcastEvent(this, BroadcastEvent.Event.BROADCASTER_QUEUE_CHANGE));
+
+            if(isValid(audioRecording) && audioRecording.getRecordingLength() > 0)
+            {
+                float durationSeconds = (float)(audioRecording.getRecordingLength() / 1E3f);
+                long timestampSeconds = (int)(audioRecording.getStartTime() / 1E3);
+                String talkgroup = getTo(audioRecording);
+                String radioId = getFrom(audioRecording);
+                Long frequency = getFrequency(audioRecording);
+                String patches = getPatches(audioRecording);
+                String talkgroupLabel = getTalkgroupLabel(audioRecording);
+                String talkgroupGroup = getTalkgroupGroup(audioRecording);
+                String systemLabel = getSystemLabel(audioRecording);
+                String path = audioRecording.getPath().toString();
+                // Remove TEMPORARY_STREAM_FILE_SUFFIX
+                String audioName = path.substring(path.substring(0, path.lastIndexOf("_")).lastIndexOf("_") + 1);
+
+                try
+                {
+                    byte[] audioBytes = null;
+
+                    try
+                    {
+                        audioBytes = Files.readAllBytes(audioRecording.getPath());
+                    }
+                    catch(IOException e)
+                    {
+                        mLog.error("Rdio Scanner API - audio recording file not found - ignoring upload");
+                    }
+
+                    if(audioBytes != null)
+                    {
+
+                        RdioScannerBuilder bodyBuilder = new RdioScannerBuilder();
+                            bodyBuilder.addPart(FormField.KEY, getBroadcastConfiguration().getApiKey())
+                            .addPart(FormField.SYSTEM, getBroadcastConfiguration().getSystemID())
+                            .addAudioName(audioName)
+                            .addFile(audioBytes)
+                            .addPart(FormField.DATE_TIME, timestampSeconds)
+                            .addPart(FormField.TALKGROUP_ID, talkgroup)
+                            .addPart(FormField.SOURCE, radioId)
+                            .addPart(FormField.FREQUENCY, frequency)
+                            .addPart(FormField.TALKGROUP_LABEL, talkgroupLabel)
+                            .addPart(FormField.TALKGROUP_GROUP, talkgroupGroup)
+                            .addPart(FormField.SYSTEM_LABEL, systemLabel)
+                            .addPart(FormField.PATCHES, patches);
+
+                        HttpRequest fileRequest = HttpRequest.newBuilder()
+                            .uri(URI.create(getBroadcastConfiguration().getHost()))
+                            .header(HttpHeaders.CONTENT_TYPE, MULTIPART_FORM_DATA + "; boundary=" + bodyBuilder.getBoundary())
+                            .header(HttpHeaders.USER_AGENT, "sdrtrunk")
+                            .POST(bodyBuilder.build())
+                            .build();
+
+                        mHttpClient.sendAsync(fileRequest, HttpResponse.BodyHandlers.ofString())
+                            .whenComplete((fileResponse, throwable1) -> {
+                                if(throwable1 != null || fileResponse.statusCode() != 200)
+                                {
+                                    if(throwable1 instanceof IOException || throwable1 instanceof CompletionException)
+                                    {
+                                        //We get socket reset exceptions occasionally when the remote server doesn't
+                                        //fully read our request and immediately responds.
+                                        setBroadcastState(BroadcastState.TEMPORARY_BROADCAST_ERROR);
+                                        mLog.error("Rdio Scanner API file upload fail [" +
+                                            fileResponse.statusCode() + "] response [" +
+                                            fileResponse.body() + "]");
+                                    }
+                                    else
+                                    {
+                                        setBroadcastState(BroadcastState.TEMPORARY_BROADCAST_ERROR);
+                                        mLog.error("Rdio Scanner API file upload fail [" +
+                                            fileResponse.statusCode() + "] response [" +
+                                            fileResponse.body() + "]");
+                                    }
+
+                                    incrementErrorAudioCount();
+                                    broadcast(new BroadcastEvent(RdioScannerBroadcaster.this,
+                                        BroadcastEvent.Event.BROADCASTER_ERROR_COUNT_CHANGE));
+                                }
+                                else
+                                {
+                                    String fileResponseString = fileResponse.body();
+
+                                    if(fileResponseString.contains("Call imported successfully."))
+                                    {
+                                        incrementStreamedAudioCount();
+                                        broadcast(new BroadcastEvent(RdioScannerBroadcaster.this,
+                                            BroadcastEvent.Event.BROADCASTER_STREAMED_COUNT_CHANGE)); 
+                                        audioRecording.removePendingReplay(); 
+                                    }
+                                    else if(fileResponseString.contains("duplicate call rejected"))
+                                    {
+                                        //Rdio Scanner is telling us to skip audio upload - someone already uploaded it
+                                        audioRecording.removePendingReplay();
+                                    }
+                                    else
+                                    {
+                                        setBroadcastState(BroadcastState.TEMPORARY_BROADCAST_ERROR);
+                                        mLog.error("Rdio Scanner API file upload fail [" +
+                                            fileResponse.statusCode() + "] response [" +
+                                            fileResponse.body() + "]");
+                                    }
+
+
+                                }
+                         
+                            });
+                    }
+                    else
+                    {
+                        //Register an error for the file not found exception
+                        mLog.error("Rdio Scanner API - upload file not found [" +
+                            audioRecording.getPath().toString() + "]");
+                        incrementErrorAudioCount();
+                        broadcast(new BroadcastEvent(RdioScannerBroadcaster.this,
+                            BroadcastEvent.Event.BROADCASTER_ERROR_COUNT_CHANGE));
+                        audioRecording.removePendingReplay();
+                    }
+                }
+                catch(Exception e)
+                {
+                    mLog.error("Unknown Error", e);
+                    setBroadcastState(BroadcastState.ERROR);
+                    incrementErrorAudioCount();
+                    broadcast(new BroadcastEvent(this, BroadcastEvent.Event.BROADCASTER_ERROR_COUNT_CHANGE));
+                    audioRecording.removePendingReplay();
+                }
+            }
+        }
+
+        //If we're not connected and there are recordings in the queue, check the recording at the head of the queue
+        // and start age-off once the recordings become too old.  The recordings should be time ordered in the queue.
+        AudioRecording audioRecording = mAudioRecordingQueue.peek();
+
+        while(audioRecording != null)
+        {
+            if(isValid(audioRecording))
+            {
+                return;
+            }
+            else
+            {
+                //Remove the recording from the queue, remove a replay, and peek at the next recording in the queue
+                mAudioRecordingQueue.poll();
+                audioRecording.removePendingReplay();
+                incrementAgedOffAudioCount();
+                broadcast(new BroadcastEvent(this, BroadcastEvent.Event.BROADCASTER_AGED_OFF_COUNT_CHANGE));
+                audioRecording = mAudioRecordingQueue.peek();
+            }
+        }
+    }
+
+    /**
+     * Creates a frequency value from the audio recording identifier collection.
+     */
+    private static Long getFrequency(AudioRecording audioRecording)
+    {
+        Identifier identifier = audioRecording.getIdentifierCollection().getIdentifier(IdentifierClass.CONFIGURATION,
+            Form.CHANNEL_FREQUENCY, Role.ANY);
+
+        if(identifier instanceof ConfigurationLongIdentifier)
+        {
+            Long value = ((ConfigurationLongIdentifier)identifier).getValue();
+
+            if(value != null)
+            {
+                return value;
+            }
+        }
+
+        return Long.valueOf(0);
+    }
+
+    /**
+     * Creates a formatted string with the FROM identifier or uses a default of zero(0)
+     */
+    private static String getFrom(AudioRecording audioRecording)
+    {
+        for(Identifier identifier: audioRecording.getIdentifierCollection().getIdentifiers(Role.FROM))
+        {
+            if(identifier instanceof RadioIdentifier)
+            {
+                return ((RadioIdentifier)identifier).getValue().toString();
+            }
+        }
+
+        return "0";
+    }
+
+    /**
+     * Creates a formatted string with the TO identifiers or uses a default of zero (0)
+     * 
+     */
+    private static String getTo(AudioRecording audioRecording)
+    {
+        Identifier identifier = audioRecording.getIdentifierCollection().getToIdentifier();
+
+        if(identifier instanceof PatchGroupIdentifier patchGroupIdentifier)
+        {
+            return patchGroupIdentifier.getValue().getPatchGroup().getValue().toString();
+        }
+        else if(identifier instanceof TalkgroupIdentifier talkgroupIdentifier)
+        {
+            return String.valueOf(RadioReferenceDecoder.convertToRadioReferenceTalkgroup(talkgroupIdentifier.getValue(),
+                    talkgroupIdentifier.getProtocol()));
+        }
+        else if(identifier instanceof RadioIdentifier radioIdentifier)
+        {
+            return radioIdentifier.getValue().toString();
+        }
+
+        return "0";
+    }
+
+    /**
+     * Creates a formatted string with the Talkgroup Label from the Audio Recording Alias
+     * If this is a PatchGroup we return only the first label as the primary talkgroup label.
+     * 
+     */
+    private String getTalkgroupLabel(AudioRecording audioRecording)
+    {
+
+        AliasList aliasList = mAliasModel.getAliasList(audioRecording.getIdentifierCollection());
+        Identifier identifier = audioRecording.getIdentifierCollection().getToIdentifier();
+
+        StringBuilder sb = new StringBuilder();
+        if(identifier != null)
+        {
+            List<Alias> aliases = aliasList.getAliases(identifier);
+            if(!aliases.isEmpty())
+            {
+                sb.append(aliases.get(0));
+            }
+
+        }
+            
+        return sb.toString();
+    }
+
+    /**
+     * Creates a formatted string with the Talkgroup Group from the Audio Recording Alias
+     * If this is a PatchGroup we return only the first group as the primary talkgroup group.
+     * 
+     */
+    private String getTalkgroupGroup(AudioRecording audioRecording)
+    {
+
+        AliasList aliasList = mAliasModel.getAliasList(audioRecording.getIdentifierCollection());
+        Identifier identifier = audioRecording.getIdentifierCollection().getToIdentifier();
+
+        StringBuilder sb = new StringBuilder();
+        if(identifier != null)
+        {
+            List<Alias> aliases = aliasList.getAliases(identifier);
+            if(!aliases.isEmpty())
+            {
+                sb.append(aliases.get(0).getGroup());
+            }
+        }
+
+        return sb.toString();
+    }
+
+    /**
+     * Creates a formatted string with the System Label from the Audio Recording Alias
+     * If this is a PatchGroup we return only the first sytem as the primary talkgroup system.
+     * 
+     */
+    private String getSystemLabel(AudioRecording audioRecording)
+    {
+        List<Identifier> systems = audioRecording.getIdentifierCollection().getIdentifiers(Form.SYSTEM);
+
+        StringBuilder sb = new StringBuilder();
+        if(!systems.isEmpty())
+        {
+           sb.append(systems.get(0));
+        }
+
+        return sb.toString();
+    }
+
+    /**
+     * Creates a formatted string with the patched talkgroups
+     */
+    public static String getPatches(AudioRecording audioRecording)
+    {
+        Identifier identifier = audioRecording.getIdentifierCollection().getToIdentifier();
+
+        if(identifier instanceof PatchGroupIdentifier patchGroupIdentifier)
+        {
+            PatchGroup patchGroup = patchGroupIdentifier.getValue();
+
+            StringBuilder sb = new StringBuilder();
+            sb.append("[");
+            
+            sb.append(patchGroup.getPatchGroup().getValue().toString());
+            
+            for(TalkgroupIdentifier patched: patchGroup.getPatchedTalkgroupIdentifiers())
+            {
+                sb.append(",").append(patched.getValue());
+            }
+
+            for(RadioIdentifier patched: patchGroup.getPatchedRadioIdentifiers())
+            {
+                sb.append(",").append(patched.getValue());
+            }
+            
+            sb.append("]");
+            return sb.toString();
+        }
+
+        return "[]";
+    }
+
+    /**
+     * Tests both the connection and configuration against the RdioScanner Call API service
+     * @param configuration containing API key and system id
+     * @return error string or null if test is successful
+     */
+    public static String testConnection(RdioScannerConfiguration configuration)
+    {
+        HttpClient httpClient = HttpClient.newBuilder()
+            .version(HttpClient.Version.HTTP_1_1)
+            .followRedirects(HttpClient.Redirect.NORMAL)
+            .connectTimeout(Duration.ofSeconds(20))
+            .build();
+
+        RdioScannerBuilder bodyBuilder = new RdioScannerBuilder();
+        bodyBuilder.addPart(FormField.KEY, configuration.getApiKey())
+            .addPart(FormField.SYSTEM, configuration.getSystemID())
+            .addPart(FormField.TEST, 1);
+
+        HttpRequest request = HttpRequest.newBuilder()
+            .uri(URI.create(configuration.getHost()))
+            .header(HttpHeaders.CONTENT_TYPE, MULTIPART_FORM_DATA + "; boundary=" + bodyBuilder.getBoundary())
+            .header(HttpHeaders.USER_AGENT, "sdrtrunk")
+            .header(HttpHeaders.ACCEPT, "*/*")
+            .POST(bodyBuilder.build())
+            .build();
+
+        HttpResponse.BodyHandler<String> responseHandler = HttpResponse.BodyHandlers.ofString();
+
+        try
+        {
+            HttpResponse<String> response = httpClient.send(request, responseHandler);
+            String responseBody = response.body();
+            return (responseBody != null ? responseBody : "(no response)") + " Status Code:" + response.statusCode();
+        }
+        catch(Exception e)
+        {
+            return e.getLocalizedMessage();
+        }
+    }
+
+    public class AudioRecordingProcessor implements Runnable
+    {
+        @Override
+        public void run()
+        {
+            processRecordingQueue();
+        }
+    }
+
+    public static void main(String[] args)
+    {
+        mLog.debug("Starting ...");
+
+        RdioScannerConfiguration config = new RdioScannerConfiguration();
+        config.setHost("https://api.RdioScanner.com/call-upload-dev");
+        config.setApiKey("c33aae37-8572-11ea-bd8b-0ecc8ab9ccec");
+        config.setSystemID(11);
+
+        String response = testConnection(config);
+
+        if(response == null)
+        {
+            mLog.debug("Test Successful!");
+        }
+        else
+        {
+            if(response.contains("1 Invalid-API-Key"))
+            {
+                mLog.error("Invalid API Key");
+            }
+            else if(response.contains("1 API-Key-Access-Denied"))
+            {
+                mLog.error("System ID not valid for API Key");
+            }
+            else
+            {
+                mLog.debug("Response: " + response);
+            }
+        }
+
+        mLog.debug("Finished!");
+    }
+}

src/main/java/io/github/dsheirer/audio/broadcast/rdioscanner/RdioScannerBuilder.java

@@ -0,0 +1,227 @@
+/*
+ * *****************************************************************************
+ *  Copyright (C) 2014-2020 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.audio.broadcast.rdioscanner;
+
+import java.net.http.HttpRequest;
+import java.util.ArrayList;
+import java.util.List;
+import java.lang.*;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+/**
+ * Builder for an HTTP body publisher to produce a RdioScanner call event
+ */
+public class RdioScannerBuilder
+{
+    private static final String DASH_DASH = "--";
+    private static final String BOUNDARY = "--sdrtrunk-sdrtrunk-sdrtrunk";
+    private List<Part> mParts = new ArrayList<>();
+    private byte[] audioBytes = null;
+    private String audioName = null;
+
+    /**
+     * Constructs an instance
+     */
+    public RdioScannerBuilder()
+    {
+    }
+
+    /**
+     * Access the static multi-part boundary string
+     */
+    public String getBoundary()
+    {
+        return BOUNDARY;
+    }
+
+    /**
+     * Adds a Audio file name part to the call
+     */
+    public RdioScannerBuilder addAudioName(String value)
+    {
+        audioName = value;
+        return this;
+    }
+
+    /**
+     * Adds a Audio bytes part to the call
+     */
+    public RdioScannerBuilder addFile(byte[] value)
+    {
+        audioBytes = value;
+        return this;
+    }
+
+    /**
+     * Adds a string part to the call
+     */
+    public RdioScannerBuilder addPart(FormField key, String value)
+    {
+        if(key != null && value != null)
+        {
+            mParts.add(new Part(key.getHeader(), value));
+        }
+
+        return this;
+    }
+
+    /**
+     * Adds a number part to the call
+     */
+    public RdioScannerBuilder addPart(FormField key, Number value)
+    {
+        if(key != null && value != null)
+        {
+            mParts.add(new Part(key.getHeader(), value.toString()));
+        }
+
+        return this;
+    }
+
+    /**
+     * Creates a form-data item
+     */
+    private static String formatPart(Part part, String boundary)
+    {
+        StringBuilder sb = new StringBuilder();
+        sb.append(DASH_DASH).append(boundary).append("\r\n");
+        sb.append("Content-Disposition: form-data; name=\"").append(part.mKey).append("\"\r\n\r\n");
+        sb.append(part.getValue()).append("\r\n");
+        return sb.toString();
+    }
+
+    /**
+     * Creates the audio file item
+     */
+    private String formatFilePart(String boundary)
+    {
+
+        if(audioBytes == null)
+        {
+            return "";
+        }
+        StringBuilder sb= new StringBuilder();
+        sb.append(DASH_DASH).append(boundary).append("\r\n");
+        sb.append("Content-Disposition: form-data; filename=\"").append(audioName);
+        sb.append("\"; name=\"").append("audio").append("\"\r\n\r\n");
+        return sb.toString();
+
+    }
+
+    /**
+     * Creates the boundary closing item
+     */
+    private static String getClosingBoundary(String boundary)
+    {
+        StringBuilder sb = new StringBuilder();
+        sb.append(DASH_DASH).append(boundary).append(DASH_DASH).append("\r\n");
+        return sb.toString();
+    }
+
+    /**
+     * Creates a BodyPublisher for accessing the call form data
+     */
+    public HttpRequest.BodyPublisher build()
+    {
+        StringBuilder sb = new StringBuilder();
+
+        for(Part part: mParts)
+        {
+            sb.append(formatPart(part, BOUNDARY));
+        }
+
+        sb.append(formatFilePart(BOUNDARY));
+
+
+        /**
+        * We need to create a ByteArray consisting of the Sting "parts" and the audio file bytes
+        */
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        
+        try
+        {
+       
+            outputStream.write(sb.toString().getBytes());
+
+            if(audioBytes != null)
+            {
+                outputStream.write(audioBytes);
+            }
+
+            sb = new StringBuilder();
+            sb.append("\r\n");
+            sb.append(getClosingBoundary(BOUNDARY));
+
+            outputStream.write(sb.toString().getBytes());
+        }
+        catch(IOException e)
+        {
+            //mLog.error("Rdio Scanner API - unable to create POST reqeust.");
+        }
+
+        return HttpRequest.BodyPublishers.ofByteArray(outputStream.toByteArray());
+    }
+
+    @Override
+    public String toString()
+    {
+        StringBuilder sb = new StringBuilder();
+
+        for(Part part: mParts)
+        {
+            sb.append(formatPart(part, BOUNDARY));
+        }
+
+        sb.append(getClosingBoundary(BOUNDARY));
+
+        return sb.toString();
+    }
+
+    /**
+     * Key:Value pair holder
+     */
+    public class Part
+    {
+        private String mKey;
+        private String mValue;
+
+        /**
+         * Constructs a new part
+         * @param key value
+         * @param value item
+         */
+        public Part(String key, String value)
+        {
+            mKey = key;
+            mValue = value;
+        }
+
+        public String getKey()
+        {
+            return mKey;
+        }
+
+        public String getValue()
+        {
+            return mValue;
+        }
+    }
+}

src/main/java/io/github/dsheirer/audio/broadcast/rdioscanner/RdioScannerConfiguration.java

@@ -0,0 +1,135 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.audio.broadcast.rdioscanner;
+
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
+import io.github.dsheirer.audio.broadcast.BroadcastConfiguration;
+import io.github.dsheirer.audio.broadcast.BroadcastFormat;
+import io.github.dsheirer.audio.broadcast.BroadcastServerType;
+import javafx.beans.binding.Bindings;
+import javafx.beans.property.IntegerProperty;
+import javafx.beans.property.SimpleIntegerProperty;
+import javafx.beans.property.SimpleStringProperty;
+import javafx.beans.property.StringProperty;
+
+/**
+ * Streaming configuration for Rdio Scanner API.
+ *
+ * Note: this API is not a streaming audio service, rather a completed call push service.  However, it fits nicely
+ * with the structure of the audio streaming subsystem in sdrtrunk
+ */
+public class RdioScannerConfiguration extends BroadcastConfiguration
+{
+    private IntegerProperty mSystemID = new SimpleIntegerProperty();
+    private StringProperty mApiKey = new SimpleStringProperty();
+
+    /**
+     * Constructor for faster jackson
+     */
+    public RdioScannerConfiguration()
+    {
+        this(BroadcastFormat.MP3);
+    }
+
+    /**
+     * Public constructor.
+     * @param format to use for audio recording (MP3)
+     */
+    public RdioScannerConfiguration(BroadcastFormat format)
+    {
+        super(format);
+
+        //The parent class binds this property, so we unbind it and rebind it here
+        mValid.unbind();
+        mValid.bind(Bindings.and(Bindings.and(Bindings.greaterThan(mSystemID, 0), Bindings.isNotNull(mApiKey)),
+            Bindings.isNotNull(mHost)));
+
+        if(mHost.getValue() == null || mHost.getValue().isEmpty())
+        {
+            mHost.set("http://localhost");
+        }
+    }
+
+    /**
+     * System ID as a property
+     */
+    public IntegerProperty systemIDProperty()
+    {
+        return mSystemID;
+    }
+
+    /**
+     * API key as a property
+     */
+    public StringProperty apiKeyProperty()
+    {
+        return mApiKey;
+    }
+
+    /**
+     * API Key
+     */
+    @JacksonXmlProperty(isAttribute = true, localName = "api_key")
+    public String getApiKey()
+    {
+        return mApiKey.get();
+    }
+
+    /**
+     * Sets the api key
+     * @param apiKey
+     */
+    public void setApiKey(String apiKey)
+    {
+        mApiKey.setValue(apiKey);
+    }
+
+    /**
+     * System ID as provided by RdioScanner.com
+     */
+    @JacksonXmlProperty(isAttribute = true, localName = "system_id")
+    public int getSystemID()
+    {
+        return mSystemID.get();
+    }
+
+    /**
+     * Sets the system ID provided by RdioScanner.com
+     */
+    public void setSystemID(int systemID)
+    {
+        mSystemID.set(systemID);
+    }
+
+    @JacksonXmlProperty(isAttribute = true, localName = "type", namespace = "http://www.w3.org/2001/XMLSchema-instance")
+    @Override
+    public BroadcastServerType getBroadcastServerType()
+    {
+        return BroadcastServerType.RDIOSCANNER_CALL;
+    }
+
+    @Override
+    public BroadcastConfiguration copyOf()
+    {
+        RdioScannerConfiguration copy = new RdioScannerConfiguration();
+        copy.setSystemID(getSystemID());
+        return copy;
+    }
+}

src/main/java/io/github/dsheirer/audio/broadcast/rdioscanner/RdioScannerFeedConfiguration.java

@@ -0,0 +1,126 @@
+/*
+ *
+ *  * ******************************************************************************
+ *  * Copyright (C) 2014-2020 Dennis Sheirer
+ *  *
+ *  * This program is free software: you can redistribute it and/or modify
+ *  * it under the terms of the GNU General Public License as published by
+ *  * the Free Software Foundation, either version 3 of the License, or
+ *  * (at your option) any later version.
+ *  *
+ *  * This program is distributed in the hope that it will be useful,
+ *  * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  * GNU General Public License for more details.
+ *  *
+ *  * You should have received a copy of the GNU General Public License
+ *  * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *  * *****************************************************************************
+ *
+ *
+ */
+package io.github.dsheirer.audio.broadcast.rdioscanner;
+
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
+import io.github.dsheirer.audio.broadcast.BroadcastConfiguration;
+import io.github.dsheirer.audio.broadcast.BroadcastFormat;
+import io.github.dsheirer.audio.broadcast.BroadcastServerType;
+import io.github.dsheirer.audio.broadcast.icecast.IcecastTCPConfiguration;
+import io.github.dsheirer.rrapi.type.UserFeedBroadcast;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class RdioScannerFeedConfiguration extends IcecastTCPConfiguration
+{
+    private final static Logger mLog = LoggerFactory.getLogger(RdioScannerFeedConfiguration.class);
+
+    private int mFeedID;
+
+    public RdioScannerFeedConfiguration()
+    {
+        //No-arg constructor for JAXB
+        this(BroadcastFormat.MP3);
+    }
+
+    /**
+     * RdioScanner configuration for Icecast 2.3.2 compatible servers
+     *
+     * @param format of output audio (MP3)
+     */
+    public RdioScannerFeedConfiguration(BroadcastFormat format)
+    {
+        super(format);
+
+        setBitRate(16);
+        setChannels(1);
+        setSampleRate(8000);
+        setInline(true);
+    }
+
+    public static RdioScannerFeedConfiguration from(UserFeedBroadcast userFeedBroadcast)
+    {
+        RdioScannerFeedConfiguration config = new RdioScannerFeedConfiguration(BroadcastFormat.MP3);
+        config.setName(userFeedBroadcast.getDescription());
+        config.setHost(userFeedBroadcast.getHostname());
+        config.setMountPoint(userFeedBroadcast.getMount());
+        config.setFeedID(userFeedBroadcast.getFeedId());
+        config.setPassword(userFeedBroadcast.getPassword());
+
+        try
+        {
+            config.setPort(Integer.parseInt(userFeedBroadcast.getPort()));
+        }
+        catch(Exception e)
+        {
+            mLog.error("Error creating Rdio Scanner configuration from radio reference user feed instance");
+        }
+
+        return config;
+    }
+
+    @Override
+    public BroadcastConfiguration copyOf()
+    {
+        RdioScannerFeedConfiguration copy = new RdioScannerFeedConfiguration(getBroadcastFormat());
+
+        //Broadcast Configuration Parameters
+        copy.setName(getName());
+        copy.setHost(getHost());
+        copy.setPort(getPort());
+        copy.setInline(getInline());
+        copy.setPassword(getPassword());
+        copy.setDelay(getDelay());
+        copy.setEnabled(false);
+
+        //Icecast Configuration Parameters
+        copy.setUserName(getUserName());
+        copy.setMountPoint(getMountPoint());
+        copy.setDescription(getDescription());
+        copy.setGenre(getGenre());
+        copy.setPublic(isPublic());
+        copy.setURL(getURL());
+
+        //RdioScanner Configuration Parameters
+        copy.setFeedID(getFeedID());
+
+        return copy;
+    }
+
+    @JacksonXmlProperty(isAttribute = true, localName = "type", namespace = "http://www.w3.org/2001/XMLSchema-instance")
+    @Override
+    public BroadcastServerType getBroadcastServerType()
+    {
+        return BroadcastServerType.RDIOSCANNER_CALL;
+    }
+
+    @JacksonXmlProperty(isAttribute = true, localName = "feed_id")
+    public int getFeedID()
+    {
+        return mFeedID;
+    }
+
+    public void setFeedID(int feedID)
+    {
+        mFeedID = feedID;
+    }
+}

src/main/java/io/github/dsheirer/audio/codec/mbe/JmbeAudioModule.java

@@ -1,23 +1,20 @@
 /*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
- *  * ******************************************************************************
- *  * Copyright (C) 2014-2019 Dennis Sheirer
- *  *
- *  * This program is free software: you can redistribute it and/or modify
- *  * it under the terms of the GNU General Public License as published by
- *  * the Free Software Foundation, either version 3 of the License, or
- *  * (at your option) any later version.
- *  *
- *  * This program is distributed in the hope that it will be useful,
- *  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  * GNU General Public License for more details.
- *  *
- *  * You should have received a copy of the GNU General Public License
- *  * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *  * *****************************************************************************
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
  */
 
 package io.github.dsheirer.audio.codec.mbe;
@@ -32,11 +29,6 @@ import io.github.dsheirer.message.IMessageListener;
 import io.github.dsheirer.preference.PreferenceType;
 import io.github.dsheirer.preference.UserPreferences;
 import io.github.dsheirer.sample.Listener;
-import jmbe.iface.IAudioCodec;
-import jmbe.iface.IAudioCodecLibrary;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.lang.reflect.InvocationTargetException;
 import java.net.MalformedURLException;
 import java.net.URL;
@@ -44,15 +36,20 @@ import java.net.URLClassLoader;
 import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.List;
+import jmbe.iface.IAudioCodec;
+import jmbe.iface.IAudioCodecLibrary;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public abstract class JmbeAudioModule extends AbstractAudioModule implements Listener<IMessage>, IMessageListener,
     ISquelchStateListener
 {
     private static final Logger mLog = LoggerFactory.getLogger(JmbeAudioModule.class);
     private static final String JMBE_AUDIO_LIBRARY = "JMBE";
-    private static List<String> mLibraryLoadStatusLogged = new ArrayList<>();
+    private static final List<String> mLibraryLoadStatusLogged = new ArrayList<>();
     private IAudioCodec mAudioCodec;
-    private UserPreferences mUserPreferences;
+    private final UserPreferences mUserPreferences;
+    private static Class sLoadedJmbeAudioConverterClass;
 
     public JmbeAudioModule(UserPreferences userPreferences, AliasList aliasList, int timeslot)
     {
@@ -70,7 +67,7 @@ public abstract class JmbeAudioModule extends AbstractAudioModule implements Lis
         mAudioCodec = null;
     }
 
-    protected IAudioCodec getAudioCodec()
+    public IAudioCodec getAudioCodec()
     {
         return mAudioCodec;
     }
@@ -110,38 +107,67 @@ public abstract class JmbeAudioModule extends AbstractAudioModule implements Lis
     protected abstract String getCodecName();
 
     /**
-     * Loads audio frame processing chain.  Constructs an imbe targetdataline
-     * to receive the raw imbe frames.  Adds an IMBE to 8k PCM format conversion
-     * stream wrapper.  Finally, adds an upsampling (8k to 48k) stream wrapper.
+     * Loads JMBE audio converter library class and then instantiates new converter instances from the loaded class.
      */
     protected void loadConverter()
     {
         IAudioCodec audioConverter = null;
 
-        Path path = mUserPreferences.getJmbeLibraryPreference().getPathJmbeLibrary();
-
-        if(path != null)
+        if(sLoadedJmbeAudioConverterClass == null)
         {
-            try
+            Path path = mUserPreferences.getJmbeLibraryPreference().getPathJmbeLibrary();
+
+            if(path != null)
             {
                 if(!mLibraryLoadStatusLogged.contains(JMBE_AUDIO_LIBRARY))
                 {
-                    mLog.info("Loading JMBE library from [" + path.toString() + "]");
+                    mLog.info("Loading JMBE library from [" + path + "]");
                 }
 
-                URLClassLoader childClassLoader = new URLClassLoader(new URL[]{path.toUri().toURL()},
-                    this.getClass().getClassLoader());
-
-                Class classToLoad = Class.forName("jmbe.JMBEAudioLibrary", true, childClassLoader);
-
-                Object instance = classToLoad.getDeclaredConstructor().newInstance();
-
-                if(instance instanceof IAudioCodecLibrary)
+                try
                 {
-                    IAudioCodecLibrary library = (IAudioCodecLibrary)instance;
+                    URLClassLoader childClassLoader = new URLClassLoader(new URL[]{path.toUri().toURL()},
+                            this.getClass().getClassLoader());
 
+                    sLoadedJmbeAudioConverterClass = Class.forName("jmbe.JMBEAudioLibrary", true, childClassLoader);
+                }
+                catch(IllegalArgumentException iae)
+                {
+                    if(!mLibraryLoadStatusLogged.contains(JMBE_AUDIO_LIBRARY + getCodecName()))
+                    {
+                        mLog.error("Couldn't load JMBE audio conversion library - " + iae.getMessage());
+                        mLibraryLoadStatusLogged.add(JMBE_AUDIO_LIBRARY + getCodecName());
+                    }
+                }
+                catch(MalformedURLException mue)
+                {
+                    if(!mLibraryLoadStatusLogged.contains(JMBE_AUDIO_LIBRARY))
+                    {
+                        mLog.error("Couldn't load JMBE audio conversion library from path [" + path + "]");
+                        mLibraryLoadStatusLogged.add(JMBE_AUDIO_LIBRARY);
+                    }
+                }
+                catch(ClassNotFoundException e1)
+                {
+                    if(!mLibraryLoadStatusLogged.contains(JMBE_AUDIO_LIBRARY))
+                    {
+                        mLog.error("Couldn't load JMBE audio conversion library - class not found");
+                        mLibraryLoadStatusLogged.add(JMBE_AUDIO_LIBRARY);
+                    }
+                }
+            }
+        }
+
+        if(sLoadedJmbeAudioConverterClass != null)
+        {
+            try
+            {
+                Object instance = sLoadedJmbeAudioConverterClass.getDeclaredConstructor().newInstance();
+
+                if(instance instanceof IAudioCodecLibrary library)
+                {
                     if((library.getMajorVersion() == 1 && library.getMinorVersion() >= 0 &&
-                        library.getBuildVersion() >= 0) || library.getMajorVersion() >= 1)
+                            library.getBuildVersion() >= 0) || library.getMajorVersion() >= 1)
                     {
                         audioConverter = library.getAudioConverter(getCodecName());
 
@@ -169,38 +195,6 @@ public abstract class JmbeAudioModule extends AbstractAudioModule implements Lis
                     }
                 }
             }
-            catch(IllegalArgumentException iae)
-            {
-                if(!mLibraryLoadStatusLogged.contains(JMBE_AUDIO_LIBRARY + getCodecName()))
-                {
-                    mLog.error("Couldn't load JMBE audio conversion library - " + iae.getMessage());
-                    mLibraryLoadStatusLogged.add(JMBE_AUDIO_LIBRARY + getCodecName());
-                }
-            }
-            catch(NoSuchMethodException nsme)
-            {
-                if(!mLibraryLoadStatusLogged.contains(JMBE_AUDIO_LIBRARY))
-                {
-                    mLog.error("Couldn't load JMBE audio conversion library - no such method exception");
-                    mLibraryLoadStatusLogged.add(JMBE_AUDIO_LIBRARY);
-                }
-            }
-            catch(MalformedURLException mue)
-            {
-                if(!mLibraryLoadStatusLogged.contains(JMBE_AUDIO_LIBRARY))
-                {
-                    mLog.error("Couldn't load JMBE audio conversion library from path [" + path + "]");
-                    mLibraryLoadStatusLogged.add(JMBE_AUDIO_LIBRARY);
-                }
-            }
-            catch(ClassNotFoundException e1)
-            {
-                if(!mLibraryLoadStatusLogged.contains(JMBE_AUDIO_LIBRARY))
-                {
-                    mLog.error("Couldn't load JMBE audio conversion library - class not found");
-                    mLibraryLoadStatusLogged.add(JMBE_AUDIO_LIBRARY);
-                }
-            }
             catch(InvocationTargetException ite)
             {
                 if(!mLibraryLoadStatusLogged.contains(JMBE_AUDIO_LIBRARY))
@@ -225,6 +219,14 @@ public abstract class JmbeAudioModule extends AbstractAudioModule implements Lis
                     mLibraryLoadStatusLogged.add(JMBE_AUDIO_LIBRARY);
                 }
             }
+            catch(NoSuchMethodException nsme)
+            {
+                if(!mLibraryLoadStatusLogged.contains(JMBE_AUDIO_LIBRARY))
+                {
+                    mLog.error("Couldn't load JMBE audio conversion library - no such method exception");
+                    mLibraryLoadStatusLogged.add(JMBE_AUDIO_LIBRARY);
+                }
+            }
         }
         else
         {
@@ -235,13 +237,6 @@ public abstract class JmbeAudioModule extends AbstractAudioModule implements Lis
             }
         }
 
-        if(audioConverter != null)
-        {
-            mAudioCodec = audioConverter;
-        }
-        else
-        {
-            mAudioCodec = null;
-        }
+        mAudioCodec = audioConverter;
     }
 }

src/main/java/io/github/dsheirer/audio/codec/mbe/MBECallSequenceConverter.java

@@ -1,27 +1,46 @@
 /*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
- *  * ******************************************************************************
- *  * Copyright (C) 2014-2019 Dennis Sheirer
- *  *
- *  * This program is free software: you can redistribute it and/or modify
- *  * it under the terms of the GNU General Public License as published by
- *  * the Free Software Foundation, either version 3 of the License, or
- *  * (at your option) any later version.
- *  *
- *  * This program is distributed in the hope that it will be useful,
- *  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  * GNU General Public License for more details.
- *  *
- *  * You should have received a copy of the GNU General Public License
- *  * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *  * *****************************************************************************
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
  */
 
 package io.github.dsheirer.audio.codec.mbe;
 
+import com.fasterxml.jackson.databind.ObjectMapper;
+import io.github.dsheirer.alias.AliasList;
+import io.github.dsheirer.audio.AudioSegment;
+import io.github.dsheirer.identifier.IdentifierUpdateNotification;
+import io.github.dsheirer.module.decode.p25.audio.P25P1AudioModule;
+import io.github.dsheirer.module.decode.p25.audio.P25P1CallSequenceRecorder;
+import io.github.dsheirer.module.decode.p25.audio.VoiceFrame;
+import io.github.dsheirer.module.decode.p25.identifier.radio.APCO25RadioIdentifier;
+import io.github.dsheirer.module.decode.p25.identifier.talkgroup.APCO25Talkgroup;
+import io.github.dsheirer.preference.UserPreferences;
+import io.github.dsheirer.record.AudioSegmentRecorder;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Collection;
+import jmbe.iface.IAudioCodec;
+import org.apache.commons.io.FileUtils;
+import org.apache.commons.io.filefilter.DirectoryFileFilter;
+import org.apache.commons.io.filefilter.SuffixFileFilter;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -32,79 +51,130 @@ public class MBECallSequenceConverter
 {
     private final static Logger mLog = LoggerFactory.getLogger(MBECallSequenceConverter.class);
 
-//    public static void convert(Path input, Path output) throws IOException
-//    {
-//        InputStream inputStream = Files.newInputStream(input);
-//        ObjectMapper mapper = new ObjectMapper();
-//        MBECallSequence sequence = mapper.readValue(inputStream, MBECallSequence.class);
-//        convert(sequence, output);
-//    }
-//
-//    public static void convert(MBECallSequence callSequence, Path outputPath)
-//    {
-//        if(callSequence == null || callSequence.isEncrypted())
-//        {
-//            throw new IllegalArgumentException("Cannot decode null or encrypted call sequence");
-//        }
-//
-//        if(callSequence != null && !callSequence.isEncrypted())
-//        {
-//            ThumbDv.AudioProtocol protocol = ThumbDv.AudioProtocol.P25_PHASE2;
-//
-//            AudioPacketWaveRecorder recorder = new AudioPacketWaveRecorder(outputPath);
-//            recorder.start();
-//
-//            long delayMillis = 0;
-//
-//            try(ThumbDv thumbDv = new ThumbDv(protocol, recorder))
-//            {
-//                thumbDv.start();
-//                for(VoiceFrame voiceFrame: callSequence.getVoiceFrames())
-//                {
-//                    mLog.debug("Frame [" + voiceFrame.getFrame() + "] + Hex [" + AmbeResponse.toHex(voiceFrame.getFrameBytes()) + "]");
-//                    thumbDv.decode(voiceFrame.getFrameBytes());
-//                    delayMillis += 30;
-//                }
-//
-//                if(delayMillis > 0)
-//                {
-//                    delayMillis += 1000;
-//                    try
-//                    {
-//                        Thread.sleep(delayMillis);
-//                    }
-//                    catch(InterruptedException ie)
-//                    {
-//
-//                    }
-//                }
-//            }
-//            catch(IOException ioe)
-//            {
-//                mLog.error("Error", ioe);
-//            }
-//
-//            recorder.stop(Paths.get(outputPath.toString().replace(".tmp", ".wav")), new WaveMetadata());
-//        }
-//    }
-//
-//    public static void main(String[] args)
-//    {
-//        String mbe = "/home/denny/SDRTrunk/recordings/20190331085324_154250000_3_TS0_65084_6591007.mbe";
-//        String mbe = "/home/denny/SDRTrunk/recordings/20190331085324_154250000_2_TS1_65035.mbe";
-//
-//        Path input = Paths.get(mbe);
-//        Path output = Paths.get(mbe.replace(".mbe", ".tmp"));
-//
-//        mLog.info("Converting: " + mbe);
-//
-//        try
-//        {
-//            MBECallSequenceConverter.convert(input, output);
-//        }
-//        catch(IOException ioe)
-//        {
-//            mLog.error("Error", ioe);
-//        }
-//    }
+    /**
+     * Converts the input MBE file to PCM audio and writes to the output wave file.
+     * @param input path to the MBE file.
+     * @param output path to write the WAVE recording.
+     * @throws IOException if there is an error.
+     */
+    public static void convert(Path input, Path output) throws IOException
+    {
+        InputStream inputStream = Files.newInputStream(input);
+        ObjectMapper mapper = new ObjectMapper();
+        MBECallSequence sequence = mapper.readValue(inputStream, MBECallSequence.class);
+        convert(sequence, output);
+    }
+
+    public static void convert(MBECallSequence callSequence, Path outputPath)
+    {
+        if(callSequence == null || callSequence.isEncrypted())
+        {
+            throw new IllegalArgumentException("Cannot decode null or encrypted call sequence");
+        }
+
+        if(callSequence != null)
+        {
+            if(callSequence.getProtocol().equals(P25P1CallSequenceRecorder.PROTOCOL))
+            {
+                P25P1AudioModule audioModule = new P25P1AudioModule(new UserPreferences(), new AliasList("mbe generator"));
+                audioModule.setRecordAudio(true);
+                audioModule.start();
+
+                if(callSequence.getFromIdentifier() != null)
+                {
+                    int from = 0;
+
+                    try
+                    {
+                        from = Integer.parseInt(callSequence.getFromIdentifier());
+                        audioModule.getIdentifierUpdateListener().receive(new IdentifierUpdateNotification(APCO25RadioIdentifier.createFrom(from),
+                                IdentifierUpdateNotification.Operation.ADD, 0));
+                    }
+                    catch(Exception e)
+                    {
+                        mLog.error("Error parsing from identifier from value [" + callSequence.getFromIdentifier());
+                    }
+                }
+
+                if(callSequence.getToIdentifier() != null)
+                {
+                    int to = 0;
+
+                    try
+                    {
+                        to = Integer.parseInt(callSequence.getToIdentifier());
+                        audioModule.getIdentifierUpdateListener().receive(new IdentifierUpdateNotification(APCO25Talkgroup.create(to),
+                                IdentifierUpdateNotification.Operation.ADD, 0));
+                    }
+                    catch(Exception e)
+                    {
+                        mLog.error("Error parsing from identifier from value [" + callSequence.getFromIdentifier());
+                    }
+                }
+
+                IAudioCodec codec = audioModule.getAudioCodec();
+
+                for(VoiceFrame voiceFrame: callSequence.getVoiceFrames())
+                {
+                    byte[] frameBytes = voiceFrame.getFrameBytes();
+                    float[] audio = codec.getAudio(frameBytes);
+                    audioModule.addAudio(audio);
+                }
+
+                AudioSegment audioSegment = audioModule.getAudioSegment();
+
+                try
+                {
+                    AudioSegmentRecorder.recordWAVE(audioSegment, outputPath);
+                }
+                catch(IOException ioe)
+                {
+                    mLog.error("Error writing audio segment, ioe");
+                }
+
+                audioModule.stop();
+            }
+        }
+    }
+
+    public static void main(String[] args)
+    {
+        boolean all = true;
+
+        String path = "/home/denny/SDRTrunk/recordings";
+        Path input = Paths.get(path);
+
+        if(all)
+        {
+            Collection<File> mbeFiles = FileUtils.listFiles(input.toFile(), new SuffixFileFilter(".mbe"), DirectoryFileFilter.DIRECTORY);
+
+            for(File inputFile: mbeFiles)
+            {
+                Path output = Paths.get(inputFile.getAbsolutePath().replace(".mbe", ".wav"));
+                mLog.info("Converting: " + inputFile);
+                try
+                {
+                    MBECallSequenceConverter.convert(inputFile.toPath(), output);
+                }
+                catch(IOException ioe)
+                {
+                    mLog.error("Error", ioe);
+                }
+            }
+        }
+        else
+        {
+            Path output = Paths.get(path.replace(".mbe", ".wav"));
+            mLog.info("Converting: " + path);
+
+            try
+            {
+                MBECallSequenceConverter.convert(input, output);
+            }
+            catch(IOException ioe)
+            {
+                mLog.error("Error", ioe);
+            }
+        }
+    }
 }

src/main/java/io/github/dsheirer/audio/playback/AudioOutput.java

@@ -1,30 +1,27 @@
 /*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
- *  * ******************************************************************************
- *  * Copyright (C) 2014-2020 Dennis Sheirer
- *  *
- *  * This program is free software: you can redistribute it and/or modify
- *  * it under the terms of the GNU General Public License as published by
- *  * the Free Software Foundation, either version 3 of the License, or
- *  * (at your option) any later version.
- *  *
- *  * This program is distributed in the hope that it will be useful,
- *  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  * GNU General Public License for more details.
- *  *
- *  * You should have received a copy of the GNU General Public License
- *  * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *  * *****************************************************************************
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
  */
 package io.github.dsheirer.audio.playback;
 
 import com.google.common.eventbus.Subscribe;
-import io.github.dsheirer.alias.id.priority.Priority;
 import io.github.dsheirer.audio.AudioEvent;
 import io.github.dsheirer.audio.AudioSegment;
+import io.github.dsheirer.controller.NamingThreadFactory;
 import io.github.dsheirer.eventbus.MyEventBus;
 import io.github.dsheirer.identifier.IdentifierCollection;
 import io.github.dsheirer.identifier.IdentifierUpdateNotification;
@@ -33,11 +30,13 @@ import io.github.dsheirer.preference.UserPreferences;
 import io.github.dsheirer.sample.Broadcaster;
 import io.github.dsheirer.sample.Listener;
 import io.github.dsheirer.source.mixer.MixerChannel;
-import io.github.dsheirer.util.ThreadPool;
-import javafx.beans.property.BooleanProperty;
-import javafx.beans.property.IntegerProperty;
-import javafx.beans.property.SimpleBooleanProperty;
-import javafx.beans.property.SimpleIntegerProperty;
+import java.nio.ByteBuffer;
+import java.util.concurrent.Executors;
+import java.util.concurrent.LinkedTransferQueue;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -51,10 +50,6 @@ import javax.sound.sampled.LineListener;
 import javax.sound.sampled.LineUnavailableException;
 import javax.sound.sampled.Mixer;
 import javax.sound.sampled.SourceDataLine;
-import java.nio.ByteBuffer;
-import java.util.concurrent.ScheduledFuture;
-import java.util.concurrent.TimeUnit;
-import java.util.concurrent.locks.ReentrantLock;
 
 /**
  * Audio output/playback channel for a single audio mixer channel.  Providers support for playback of audio segments
@@ -67,7 +62,6 @@ public abstract class AudioOutput implements LineListener, Listener<IdentifierUp
     private int mBufferStopThreshold;
     private Listener<IdentifierCollection> mIdentifierCollectionListener;
     private Broadcaster<AudioEvent> mAudioEventBroadcaster = new Broadcaster<>();
-    private ScheduledFuture<?> mProcessorFuture;
     private SourceDataLine mOutput;
     private Mixer mMixer;
     private MixerChannel mMixerChannel;
@@ -76,17 +70,18 @@ public abstract class AudioOutput implements LineListener, Listener<IdentifierUp
     private AudioEvent mAudioStartEvent;
     private AudioEvent mAudioStopEvent;
     private boolean mCanProcessAudio = false;
+    private LinkedTransferQueue<AudioSegment> mAudioSegmentQueue = new LinkedTransferQueue<>();
     private AudioSegment mCurrentAudioSegment;
-    private AudioSegment mNextAudioSegment;
-    private ReentrantLock mLock = new ReentrantLock();
     private int mCurrentBufferIndex = 0;
     private UserPreferences mUserPreferences;
-    private BooleanProperty mEmptyProperty = new SimpleBooleanProperty(true);
-    private IntegerProperty mAudioPriority = new SimpleIntegerProperty(Priority.DEFAULT_PRIORITY);
     private ByteBuffer mAudioSegmentStartTone;
-    private ByteBuffer mAudioSegmentPreemptTone;
     private ByteBuffer mAudioSegmentDropTone;
     private boolean mRunning = false;
+    private ScheduledExecutorService mScheduledExecutorService;
+    private ScheduledFuture<?> mProcessorFuture;
+    private boolean mDropDuplicates;
+    private long mOutputLastTimestamp = 0;
+    private static final long STALE_PLAYBACK_THRESHOLD_MS = 500;
 
     /**
      * Single audio channel playback with automatic starting and stopping of the
@@ -107,7 +102,10 @@ public abstract class AudioOutput implements LineListener, Listener<IdentifierUp
     {
         mMixer = mixer;
         mMixerChannel = mixerChannel;
+        mScheduledExecutorService = Executors.newSingleThreadScheduledExecutor(new NamingThreadFactory(
+                "sdrtrunk audio output " + mixerChannel.name()));
         mUserPreferences = userPreferences;
+        mDropDuplicates = mUserPreferences.getDuplicateCallDetectionPreference().isDuplicatePlaybackSuppressionEnabled();
 
         try
         {
@@ -150,7 +148,7 @@ public abstract class AudioOutput implements LineListener, Listener<IdentifierUp
                     }
 
 					//Run the queue processor task every 100 milliseconds or 10 times a second
-                    mProcessorFuture = ThreadPool.SCHEDULED.scheduleAtFixedRate(new AudioSegmentProcessor(),
+                    mProcessorFuture = mScheduledExecutorService.scheduleAtFixedRate(new AudioSegmentProcessor(),
                         0, 100, TimeUnit.MILLISECONDS);
                 }
 
@@ -167,31 +165,22 @@ public abstract class AudioOutput implements LineListener, Listener<IdentifierUp
 
         updateToneInsertionAudioClips();
 
-        //Register to receive directory preference update notifications so we can update the preference items
+        //Register to receive preference update notifications so we can update the preference items
         MyEventBus.getGlobalEventBus().register(this);
     }
 
     /**
-     * Boolean property that indicates if this audio output has an audio segment queued or in process of playback.
+     * Indicates if this audio output doesn't currently have any audio segments queued for playback.
+     * @return true if empty
      */
-    public BooleanProperty emptyProperty()
+    public boolean isEmpty()
     {
-        return mEmptyProperty;
+        return mAudioSegmentQueue.isEmpty();
     }
 
     /**
-     * Audio playback priority of the current audio segment or default audio priority if nothing is currently loaded.
-     */
-    public IntegerProperty audioPriorityProperty()
-    {
-        return mAudioPriority;
-    }
-
-    /**
-     * Schedules the audio segment for playback.
-     *
-     * Note: if a segment is currently playing and another audio segment is already queued for playback, invoking
-     * this method will overwrite the queued segment with the argument.
+     * Schedules the audio segment for playback.  The audio segment user count should already be incremented by the
+     * calling entity.
      *
      * @param audioSegment to schedule for playback.
      */
@@ -199,23 +188,8 @@ public abstract class AudioOutput implements LineListener, Listener<IdentifierUp
     {
         if(audioSegment != null)
         {
-            mLock.lock();
-
-            if(mNextAudioSegment != null)
-            {
-                mNextAudioSegment.decrementConsumerCount();
-                mNextAudioSegment = null;
-            }
-
-            try
-            {
-                mNextAudioSegment = audioSegment;
-                mEmptyProperty.set(false);
-            }
-            finally
-            {
-                mLock.unlock();
-            }
+            //Audio segment use count has already been incremented by the external caller.
+            mAudioSegmentQueue.add(audioSegment);
         }
     }
 
@@ -254,6 +228,10 @@ public abstract class AudioOutput implements LineListener, Listener<IdentifierUp
         {
             updateToneInsertionAudioClips();
         }
+        else if(preferenceType == PreferenceType.DUPLICATE_CALL_DETECTION)
+        {
+            mDropDuplicates = mUserPreferences.getDuplicateCallDetectionPreference().isDuplicatePlaybackSuppressionEnabled();
+        }
     }
 
     /**
@@ -262,7 +240,6 @@ public abstract class AudioOutput implements LineListener, Listener<IdentifierUp
     private void updateToneInsertionAudioClips()
     {
         mAudioSegmentStartTone = null;
-        mAudioSegmentPreemptTone = null;
         mAudioSegmentDropTone = null;
 
         float[] start = mUserPreferences.getPlaybackPreference().getStartTone();
@@ -272,13 +249,6 @@ public abstract class AudioOutput implements LineListener, Listener<IdentifierUp
             mAudioSegmentStartTone = convert(start);
         }
 
-        float[] preempt = mUserPreferences.getPlaybackPreference().getPreemptTone();
-
-        if(preempt != null)
-        {
-            mAudioSegmentPreemptTone = convert(preempt);
-        }
-
         float[] drop = mUserPreferences.getPlaybackPreference().getDropTone();
 
         if(drop != null)
@@ -287,48 +257,6 @@ public abstract class AudioOutput implements LineListener, Listener<IdentifierUp
         }
     }
 
-    /**
-     * Disposes of a processed audio segment and notifies the originator that processing of the segment is complete
-     * by decrementing the consumer count.
-     * @param audioSegment to dispose
-     */
-    private void dispose(AudioSegment audioSegment)
-    {
-        mAudioPriority.unbind();
-
-        if(audioSegment != null)
-        {
-            audioSegment.decrementConsumerCount();
-            audioSegment.removeIdentifierUpdateNotificationListener(this);
-        }
-    }
-
-    /**
-     * Generates a tone indicating that a new audio segment is starting
-     */
-    private ByteBuffer getAudioSegmentStartTone()
-    {
-        return mAudioSegmentStartTone;
-    }
-
-    /**
-     * Generates a tone indicating that the current audio segment playback has been preempted for a higher priority
-     * audio segment that is now starting.
-     */
-    private ByteBuffer getAudioSegmentPreemptionTone()
-    {
-        return mAudioSegmentPreemptTone;
-    }
-
-    /**
-     * Generates a tone indicating that the current audio segment playback has been dropped because the audio segment
-     * has been flagged as Do Not Monitor after playback has started.
-     */
-    private ByteBuffer getAudioSegmentDropTone()
-    {
-        return mAudioSegmentDropTone;
-    }
-
     /**
      * Writes the audio buffer data to the source data line.  If the data line is not currently playing, write as
      * much of the buffer to the data line as will fit, start the dataline, and then finish writing the residual
@@ -355,6 +283,7 @@ public abstract class AudioOutput implements LineListener, Listener<IdentifierUp
 
                 //Top off the buffer and check if we can start it
                 wrote += mOutput.write(buffer.array(), 0, toWrite);
+                mOutputLastTimestamp = System.currentTimeMillis();
 
                 checkStart();
             }
@@ -363,149 +292,146 @@ public abstract class AudioOutput implements LineListener, Listener<IdentifierUp
             {
                 //This will block until the buffer is fully written to the data line
                 mOutput.write(buffer.array(), wrote, buffer.array().length - wrote);
+                mOutputLastTimestamp = System.currentTimeMillis();
             }
         }
     }
 
+    /**
+     * Dispose of the currently assigned audio segment.
+     */
+    private void disposeCurrentAudioSegment()
+    {
+        if(mCurrentAudioSegment != null)
+        {
+            mCurrentAudioSegment.decrementConsumerCount();
+            mCurrentAudioSegment.removeIdentifierUpdateNotificationListener(this);
+            mCurrentAudioSegment = null;
+            broadcast(null);
+        }
+    }
+
+    /**
+     * Loads the next audio segment from the queue.
+     */
+    private void loadNextAudioSegment()
+    {
+        AudioSegment audioSegment = mAudioSegmentQueue.poll();
+
+        boolean verificationInProgress = (audioSegment != null);
+
+        while(verificationInProgress)
+        {
+            if(audioSegment != null)
+            {
+                //Throw away the audio segment if it has been flagged as do not monitor or is duplicate
+                if(isThrowaway(audioSegment))
+                {
+                    audioSegment.decrementConsumerCount();
+                    audioSegment = mAudioSegmentQueue.poll();
+                }
+                else
+                {
+                    verificationInProgress = false;
+                }
+            }
+            else
+            {
+                verificationInProgress = false;
+            }
+        }
+
+        mCurrentAudioSegment = audioSegment;
+
+        if(audioSegment != null)
+        {
+            mCurrentAudioSegment.addIdentifierUpdateNotificationListener(this);
+            broadcast(mCurrentAudioSegment.getIdentifierCollection());
+        }
+
+        mCurrentBufferIndex = 0;
+    }
+
+    /**
+     * Indicates if the audio segment should be thrown away because it is marked as duplicate or do-not-monitor.
+     * @param audioSegment to evaluate
+     * @return true if the audio should be thrown away.
+     */
+    private boolean isThrowaway(AudioSegment audioSegment)
+    {
+        return audioSegment != null && (audioSegment.isDoNotMonitor() || mDropDuplicates && (audioSegment.isDuplicate()));
+    }
+
     /**
      * Manage audio segment playback and process audio segment buffers.  This method is designed to be called
-     * by a threaded processor repeatedly to playback the current audio segment and check for and start a newly
-     * assigned audio segment.  It also handles starting and stopping the playback source data line to avoid audio
+     * by a threaded processor repeatedly to playback the current audio segment and check for and start newly
+     * added audio segments.  It also handles starting and stopping the playback source data line to avoid audio
      * discontinuities due to buffer underruns.
      */
     private void processAudio()
     {
-        if(mNextAudioSegment != null)
+        if(mCurrentAudioSegment == null)
         {
-            mLock.lock();
-
-            try
-            {
-                //Remove an assigned segment that's subsequently flagged as duplicate or do not monitor before playback
-                if(mNextAudioSegment.isDoNotMonitor() || (mNextAudioSegment.isDuplicate() &&
-                    mUserPreferences.getDuplicateCallDetectionPreference().isDuplicatePlaybackSuppressionEnabled()))
-                {
-                    mNextAudioSegment = null;
-
-                    if(mCurrentAudioSegment == null)
-                    {
-                        mEmptyProperty.set(true);
-                    }
-                }
-                //For linked audio segments, allow the linked segment to complete first before assigning the next
-                else if(mNextAudioSegment.isLinked())
-                {
-                    if(mCurrentAudioSegment == null)
-                    {
-                        mCurrentAudioSegment = mNextAudioSegment;
-                        mNextAudioSegment = null;
-                        mCurrentBufferIndex = 0;
-
-                        if(mCurrentAudioSegment != null)
-                        {
-                            mAudioPriority.bind(mCurrentAudioSegment.monitorPriorityProperty());
-                            mCurrentAudioSegment.addIdentifierUpdateNotificationListener(this);
-                            broadcast(mCurrentAudioSegment.getIdentifierCollection());
-                        }
-                        else
-                        {
-                            mAudioPriority.setValue(Priority.DEFAULT_PRIORITY);
-                        }
-                    }
-                }
-                else
-                {
-                    //Insert audio segment start or audio priority preemption bonk tone
-                    if(mCurrentAudioSegment == null)
-                    {
-                        playAudio(getAudioSegmentStartTone());
-                    }
-                    else if(mCurrentBufferIndex > 0 &&
-                        (!mCurrentAudioSegment.completeProperty().get() ||
-                            mCurrentBufferIndex < mCurrentAudioSegment.getAudioBufferCount()))
-                    {
-                        playAudio(getAudioSegmentPreemptionTone());
-                    }
-                    else
-                    {
-                        playAudio(getAudioSegmentStartTone());
-                    }
-
-                    //Close current audio segment
-                    dispose(mCurrentAudioSegment);
-                    mCurrentAudioSegment = mNextAudioSegment;
-                    mNextAudioSegment = null;
-                    mCurrentBufferIndex = 0;
-
-                    if(mCurrentAudioSegment != null)
-                    {
-                        mAudioPriority.bind(mCurrentAudioSegment.monitorPriorityProperty());
-                        mCurrentAudioSegment.addIdentifierUpdateNotificationListener(this);
-                        broadcast(mCurrentAudioSegment.getIdentifierCollection());
-                    }
-                    else
-                    {
-                        mAudioPriority.setValue(Priority.DEFAULT_PRIORITY);
-                    }
-                }
-            }
-            finally
-            {
-                mLock.unlock();
-            }
+            loadNextAudioSegment();
         }
 
-        if(mCurrentAudioSegment != null)
+        //Evaluate current audio segment to see if the status has changed for duplicate or do-not-monitor.
+        while(isThrowaway(mCurrentAudioSegment))
         {
-            //Check for completed audio segment or a segment flagged as duplicate or Do Not Monitor
-            if(mCurrentAudioSegment.isDoNotMonitor() ||
-               (mCurrentAudioSegment.isDuplicate() &&
-                mUserPreferences.getDuplicateCallDetectionPreference().isDuplicatePlaybackSuppressionEnabled()) ||
-                (mCurrentAudioSegment.completeProperty().get() && mCurrentBufferIndex >= mCurrentAudioSegment.getAudioBufferCount()))
+            if(mCurrentBufferIndex > 0)
             {
-                if(mCurrentAudioSegment.isDoNotMonitor())
+                playAudio(mAudioSegmentDropTone);
+            }
+
+            disposeCurrentAudioSegment();
+            loadNextAudioSegment();
+        }
+
+        while(mCurrentAudioSegment != null && mCurrentBufferIndex < mCurrentAudioSegment.getAudioBufferCount())
+        {
+            //Continuously evaluate current audio segment to see if the status has changed for duplicate or do-not-monitor.
+            if(isThrowaway(mCurrentAudioSegment))
+            {
+                if(mCurrentBufferIndex > 0)
                 {
-                    playAudio(getAudioSegmentDropTone());
+                    playAudio(mAudioSegmentDropTone);
                 }
 
-                dispose(mCurrentAudioSegment);
-                mCurrentAudioSegment = null;
-
-                mLock.lock();
+                disposeCurrentAudioSegment();
+            }
+            else
+            {
+                if(mCurrentBufferIndex == 0)
+                {
+                    playAudio(mAudioSegmentStartTone);
+                }
 
                 try
                 {
-                    if(mNextAudioSegment == null)
+                    float[] audioBuffer = mCurrentAudioSegment.getAudioBuffers().get(mCurrentBufferIndex++);
+
+                    if(audioBuffer != null)
                     {
-                        mEmptyProperty.set(true);
+                        ByteBuffer audio = convert(audioBuffer);
+                        //This call blocks until all audio bytes are dumped into the data line.
+                        playAudio(audio);
                     }
                 }
-                finally
+                catch(Exception e)
                 {
-                    mLock.unlock();
-                }
-
-                return;
-            }
-
-            //Process any new buffers that have been added to the audio segment.  If a next audio segment gets assigned
-            //while processing, exit the loop so that we can evaluate the next for higher priority preempt.  If the next
-            //segment is a linked segment, ignore it so that we can close out the current segment.
-            while(mCurrentAudioSegment != null && (mNextAudioSegment == null || mNextAudioSegment.isLinked()) &&
-                   mCurrentBufferIndex < mCurrentAudioSegment.getAudioBufferCount() &&
-                   !mCurrentAudioSegment.isDoNotMonitor() && !(mCurrentAudioSegment.isDuplicate() &&
-                mUserPreferences.getDuplicateCallDetectionPreference().isDuplicatePlaybackSuppressionEnabled()))
-            {
-                float[] audioBuffer = mCurrentAudioSegment.getAudioBuffers().get(mCurrentBufferIndex++);
-
-                if(audioBuffer != null)
-                {
-                    ByteBuffer audio = convert(audioBuffer);
-                    playAudio(audio);
+                    mLog.error("Error while processing audio for [" + mMixerChannel.name() + "]", e);
                 }
             }
         }
 
+        //Check for completed and fully-played audio segment to closeout
+        if(mCurrentAudioSegment != null &&
+           mCurrentAudioSegment.isComplete() &&
+           (mCurrentBufferIndex >= mCurrentAudioSegment.getAudioBufferCount()))
+        {
+            disposeCurrentAudioSegment();
+        }
+
         checkStop();
     }
 
@@ -523,25 +449,7 @@ public abstract class AudioOutput implements LineListener, Listener<IdentifierUp
         }
 
         mProcessorFuture = null;
-
-        mLock.lock();
-
-        try
-        {
-            if(mNextAudioSegment != null)
-            {
-                mNextAudioSegment.decrementConsumerCount();
-                mNextAudioSegment = null;
-            }
-        }
-        finally
-        {
-            mLock.unlock();
-        }
-
-        dispose(mCurrentAudioSegment);
-        mCurrentAudioSegment = null;
-
+        disposeCurrentAudioSegment();
         mAudioEventBroadcaster.clear();
         mIdentifierCollectionListener = null;
 
@@ -650,14 +558,28 @@ public abstract class AudioOutput implements LineListener, Listener<IdentifierUp
         if(mRunning)
         {
             //If the output buffer falls below the threshold then drain the output and stop playback
-            if(mOutput.isRunning() && mOutput.available() >= mBufferStopThreshold)
+            if(mOutput.isRunning())
             {
-                mOutput.drain();
-                mOutput.stop();
-                mRunning = false;
+                if(mOutput.available() >= mBufferStopThreshold)
+                {
+                    mOutput.drain();
+                    mOutput.stop();
+                    mRunning = false;
+                }
+                //Detect when we have a partially filled output that will neither start nor stop and the last write
+                //timestamp was more than the staleness threshold (500 ms) -- stop the output and discard stale contents
+                else if(mOutput.available() < mBufferStopThreshold &&
+                        mOutput.available() > mBufferStartThreshold &&
+                        (System.currentTimeMillis() - mOutputLastTimestamp >= STALE_PLAYBACK_THRESHOLD_MS))
+                {
+                    mOutput.stop();
+                    //Discard the stale buffer contents.
+                    mOutput.flush();
+                    mRunning = false;
+                }
             }
             //If output playback stopped on its own because the buffer emptied, then cleanup
-            else if(!mOutput.isRunning())
+            else
             {
                 mRunning = false;
             }
@@ -735,16 +657,23 @@ public abstract class AudioOutput implements LineListener, Listener<IdentifierUp
      */
     public class AudioSegmentProcessor implements Runnable
     {
+        private AtomicBoolean mProcessing = new AtomicBoolean();
+
         @Override
         public void run()
         {
-            try
+            if(mProcessing.compareAndSet(false, true))
             {
-                processAudio();
-            }
-            catch(Throwable t)
-            {
-                mLog.error("Error while processing audio buffers", t);
+                try
+                {
+                    processAudio();
+                }
+                catch(Throwable t)
+                {
+                    mLog.error("Error while processing audio buffers", t);
+                }
+
+                mProcessing.set(false);
             }
         }
     }

src/main/java/io/github/dsheirer/audio/playback/AudioPlaybackManager.java

@@ -1,7 +1,6 @@
 /*
- * ******************************************************************************
- * sdrtrunk
- * Copyright (C) 2014-2018 Dennis Sheirer
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -15,7 +14,7 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
- * *****************************************************************************
+ * ****************************************************************************
  */
 package io.github.dsheirer.audio.playback;
 
@@ -24,6 +23,7 @@ import io.github.dsheirer.audio.AudioEvent;
 import io.github.dsheirer.audio.AudioException;
 import io.github.dsheirer.audio.AudioSegment;
 import io.github.dsheirer.audio.IAudioController;
+import io.github.dsheirer.controller.NamingThreadFactory;
 import io.github.dsheirer.eventbus.MyEventBus;
 import io.github.dsheirer.preference.PreferenceType;
 import io.github.dsheirer.preference.UserPreferences;
@@ -31,17 +31,18 @@ import io.github.dsheirer.sample.Broadcaster;
 import io.github.dsheirer.sample.Listener;
 import io.github.dsheirer.source.mixer.MixerChannel;
 import io.github.dsheirer.source.mixer.MixerChannelConfiguration;
-import io.github.dsheirer.util.ThreadPool;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.util.ArrayList;
 import java.util.Comparator;
 import java.util.Iterator;
 import java.util.List;
+import java.util.concurrent.Executors;
 import java.util.concurrent.LinkedTransferQueue;
+import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.ScheduledFuture;
 import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Manages scheduling and playback of audio segments to the local users audio system.
@@ -50,8 +51,6 @@ public class AudioPlaybackManager implements Listener<AudioSegment>, IAudioContr
 {
     private static final Logger mLog = LoggerFactory.getLogger(AudioPlaybackManager.class);
 
-    public static final String AUDIO_CHANNELS_PROPERTY = "audio.manager.channels";
-    public static final String AUDIO_MIXER_PROPERTY = "audio.manager.mixer";
     public static final AudioEvent CONFIGURATION_CHANGE_STARTED =
         new AudioEvent(AudioEvent.Type.AUDIO_CONFIGURATION_CHANGE_STARTED, null);
     public static final AudioEvent CONFIGURATION_CHANGE_COMPLETE =
@@ -64,6 +63,8 @@ public class AudioPlaybackManager implements Listener<AudioSegment>, IAudioContr
     private List<AudioSegment> mAudioSegments = new ArrayList<>();
     private List<AudioSegment> mPendingAudioSegments = new ArrayList<>();
     private LinkedTransferQueue<AudioSegment> mNewAudioSegmentQueue = new LinkedTransferQueue<>();
+    private ScheduledExecutorService mScheduledExecutorService =
+            Executors.newSingleThreadScheduledExecutor(new NamingThreadFactory("sdrtrunk audio manager"));
 
     /**
      * Constructs an instance.
@@ -202,29 +203,13 @@ public class AudioPlaybackManager implements Listener<AudioSegment>, IAudioContr
             //Sort audio segments by playback priority and assign to empty audio outputs
             if(!mAudioSegments.isEmpty())
             {
+                //TODO: change this to take audio segment start time into account also
                 mAudioSegments.sort(Comparator.comparingInt(o -> o.monitorPriorityProperty().get()));
 
                 //Assign empty audio outputs first
                 for(AudioOutput audioOutput: mAudioOutputs)
                 {
-                    if(audioOutput.emptyProperty().get())
-                    {
-                        audioOutput.play(mAudioSegments.remove(0));
-
-                        if(mAudioSegments.isEmpty())
-                        {
-                            return;
-                        }
-                    }
-                }
-            }
-
-            //Preempt ongoing audio segment playback when higher priority audio segments are available
-            if(!mAudioSegments.isEmpty())
-            {
-                for(AudioOutput audioOutput: mAudioOutputs)
-                {
-                    if(mAudioSegments.get(0).monitorPriorityProperty().get() < audioOutput.audioPriorityProperty().get())
+                    if(audioOutput.isEmpty())
                     {
                         audioOutput.play(mAudioSegments.remove(0));
 
@@ -284,7 +269,7 @@ public class AudioPlaybackManager implements Listener<AudioSegment>, IAudioContr
                 }
                 catch(AudioException ae)
                 {
-                    mLog.error("Error changing audio output to [" + configuration.toString() + "]", ae);
+                    mLog.error("Error changing audio output to [" + configuration + "]", ae);
                 }
             }
         }
@@ -332,7 +317,7 @@ public class AudioPlaybackManager implements Listener<AudioSegment>, IAudioContr
                     throw new AudioException("Unsupported mixer channel configuration: " + entry.getMixerChannel());
             }
 
-            mProcessingTask = ThreadPool.SCHEDULED.scheduleAtFixedRate(new AudioSegmentProcessor(),
+            mProcessingTask = mScheduledExecutorService.scheduleAtFixedRate(new AudioSegmentProcessor(),
                 0, 100, TimeUnit.MILLISECONDS);
             mControllerBroadcaster.broadcast(CONFIGURATION_CHANGE_COMPLETE);
             mMixerChannelConfiguration = entry;
@@ -343,7 +328,7 @@ public class AudioPlaybackManager implements Listener<AudioSegment>, IAudioContr
      * Current audio playback mixer channel configuration setting.
      */
     @Override
-    public MixerChannelConfiguration getMixerChannelConfiguration() throws AudioException
+    public MixerChannelConfiguration getMixerChannelConfiguration()
     {
         return mMixerChannelConfiguration;
     }
@@ -384,16 +369,23 @@ public class AudioPlaybackManager implements Listener<AudioSegment>, IAudioContr
      */
     public class AudioSegmentProcessor implements Runnable
     {
+        private AtomicBoolean mProcessing = new AtomicBoolean();
+
         @Override
         public void run()
         {
-            try
+            if(mProcessing.compareAndSet(false, true))
             {
-                processAudioSegments();
-            }
-            catch(Throwable t)
-            {
-                mLog.error("Encountered error while processing audio segments", t);
+                try
+                {
+                    processAudioSegments();
+                }
+                catch(Throwable t)
+                {
+                    mLog.error("Encountered error while processing audio segments", t);
+                }
+
+                mProcessing.set(false);
             }
         }
     }

src/main/java/io/github/dsheirer/bits/BinaryMessage.java

@@ -20,6 +20,7 @@ package io.github.dsheirer.bits;
 
 import io.github.dsheirer.edac.CRC;
 import java.io.UnsupportedEncodingException;
+import java.nio.charset.Charset;
 import java.util.BitSet;
 import org.apache.commons.lang3.Validate;
 import org.apache.commons.math3.util.FastMath;
@@ -33,6 +34,8 @@ public class BinaryMessage extends BitSet
     private static final int[] CHARACTER_7_BIT = new int[]{0, 1, 2, 3, 4, 5, 6};
     private static final int[] CHARACTER_8_BIT = new int[]{0, 1, 2, 3, 4, 5, 6, 7};
     private static final String UTF_8 = "UTF-8";
+    private static final String GB2312 = "GB2312";
+
 
     /**
      * Logical (ie constructed) size of this bitset, despite the actual size of
@@ -274,8 +277,7 @@ public class BinaryMessage extends BitSet
         }
         else
         {
-            throw new BitSetFullException("bitset is full -- contains " +
-                (mPointer + 1) + "bits");
+            throw new BitSetFullException("bitset is full -- contains [" + mPointer + "/" + size() + "] bits");
         }
     }
 
@@ -843,13 +845,18 @@ public class BinaryMessage extends BitSet
      */
     public int getTwosComplement(int start, int end)
     {
-        BinaryMessage sub = getSubMessage(start, end);
-        boolean negative = sub.get(start);
-        sub.flip(0, sub.size());
-
-        int value = sub.getInt(0, sub.size()) + 1;
-        value *= (negative ? -1 : 1);
-        return value;
+        if(get(start))
+        {
+            //Negative value - flip and add one
+            BinaryMessage fragment = getSubMessage(start, end);
+            fragment.flip(0, fragment.size());
+            return fragment.getInt(1, fragment.size()) + 1;
+        }
+        else
+        {
+            //Positive value - return the contents.
+            return getInt(start + 1, end);
+        }
     }
 
 
@@ -1236,6 +1243,26 @@ public class BinaryMessage extends BitSet
         return new String(bytes, UTF_8);
     }
 
+    /**
+     * Parse GB2312 Simplified Chinese Characters from the message starting at the offset.
+     * @param offset where to start parsing.
+     * @param characterCount number of characters to parse
+     * @return parsed message.
+     * @throws UnsupportedEncodingException if GB2312 encoding is not supported.
+     */
+    public String parseGB2312(int offset, int characterCount) throws UnsupportedEncodingException
+    {
+        int length = characterCount * 2;
+        byte[] bytes = new byte[length];
+
+        for(int x = 0; x < length; x++)
+        {
+            bytes[x] = getByte(CHARACTER_8_BIT, x * 8 + offset);
+        }
+
+        return new String(bytes, GB2312);
+    }
+
     /**
      * Parse 16-bit unicode characters from the message starting at the offset.
      * @param offset where to start parsing.
@@ -1252,7 +1279,7 @@ public class BinaryMessage extends BitSet
             bytes[x] = getByte(CHARACTER_8_BIT, x * 8 + offset);
         }
 
-        return new String(bytes);
+        return new String(bytes, Charset.forName("UTF-16"));
     }
 
     /**

src/main/java/io/github/dsheirer/bits/SyncPattern.java

@@ -132,12 +132,10 @@ public enum SyncPattern
 		true, true, false, false   //1100 0xC
 	}),
 
-	/* Sync (0x158) = 1101011000 */
+	/* Sync (0x158) = 101011000 */
 	PASSPORT( new boolean[] 
 	{
-		true, 						//0001 0x1
-		false, true, false, true, 	//0101 0x5
-		true, false, false, false	//1000 0x8
+		true,false,true,false,true,true,false,false,false
 	} ),
 	
 	LTR_STANDARD_OSW( new boolean[] 

src/main/java/io/github/dsheirer/buffer/DcCorrectionManager.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -84,7 +84,7 @@ public class DcCorrectionManager
         {
             mDcCalculationsRemaining--;
         }
-//
+
 //        mLog.info("DC: " + mDecimalFormat.format(mAverageDc) +
 //                " RES:" + mDecimalFormat.format(residualOffsetToRemove) +
 //                " REM:" + mDcCalculationsRemaining);

src/main/java/io/github/dsheirer/buffer/FloatCircularBuffer.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -21,21 +21,16 @@ package io.github.dsheirer.buffer;
 import java.util.Arrays;
 
 /**
- * Circular sample buffer - allocates a buffer and stores samples in a circular
- * fashion, overwriting older samples with newly arrived samples.  Initially
- * fills buffer with 0-valued samples
- *
- * Can be used as a delay-type buffer, to delay samples by the 'size' amount
+ * Circular sample buffer - allocates a buffer and stores samples in a circular fashion, overwriting older samples with
+ * newly arrived samples.  Initially fills buffer with 0-valued (default) samples or with a specified value.
  */
 public class FloatCircularBuffer
 {
     private float[] mBuffer;
     private int mBufferPointer = 0;
-    private float mOldestSample;
 
     /**
      * Creates a circular double buffer of the specified size and all entries filled with the specified initial value.
-     *
      * @param size of the buffer
      * @param initialFillValue to fill the buffer entries
      */
@@ -47,7 +42,6 @@ public class FloatCircularBuffer
 
     /**
      * Creates a circular double buffer of the specified size and all entries filled with an initial value of zero.
-     *
      * @param size of the buffer
      */
     public FloatCircularBuffer(int size)
@@ -55,33 +49,34 @@ public class FloatCircularBuffer
         this(size, 0.0f);
     }
 
-    public float[] getBuffer()
+    /**
+     * Resets the delay buffer to an all zeros state
+     */
+    public void reset(float fillValue)
     {
-        return mBuffer;
+        Arrays.fill(mBuffer, fillValue);
     }
 
     /**
-     * Gets the current buffer value and overwrites that value position in the buffer with the new value.
+     * Puts the new value into the buffer and returns the oldest buffer value that it replaced
      *
      * @param newValue to add to the buffer
      * @return oldest value that was overwritten by the new value
      */
-    public float getAndPut(float newValue)
+    public float get(float newValue)
     {
-        mOldestSample = mBuffer[mBufferPointer];
-        put(newValue);
-        return mOldestSample;
-    }
+        float oldestSample = mBuffer[mBufferPointer];
 
-    /**
-     * Puts the value into the buffer, updates the pointer and returns the buffer value at the pointer position.
-     * @param sample to add
-     * @return next pointed sample.
-     */
-    public float putAndGet(float sample)
-    {
-        put(sample);
-        return mBuffer[mBufferPointer];
+        mBuffer[mBufferPointer] = newValue;
+
+        mBufferPointer++;
+
+        if(mBufferPointer >= mBuffer.length)
+        {
+            mBufferPointer = 0;
+        }
+
+        return oldestSample;
     }
 
     public float[] getAll()
@@ -105,13 +100,70 @@ public class FloatCircularBuffer
 
     /**
      * Places the new value into the buffer, overwriting the oldest value
-     *
      * @param newValue to add to the buffer
      */
     public void put(float newValue)
     {
         mBuffer[mBufferPointer] = newValue;
+
         mBufferPointer++;
-        mBufferPointer %= mBuffer.length;
+
+        if(mBufferPointer >= mBuffer.length)
+        {
+            mBufferPointer = 0;
+        }
+    }
+
+    /**
+     * Returns the maximum from the values currently in the buffer
+     */
+    public float max(float referenceValue)
+    {
+        float max = referenceValue;
+
+        for(int x = 0; x < mBuffer.length; x++)
+        {
+            if(mBuffer[x] > max)
+            {
+                max = mBuffer[x];
+            }
+        }
+
+//        System.out.println("Max [" + max + "] from " + Arrays.toString(mBuffer));
+
+        return max;
+    }
+
+    /**
+     * Returns the minimum from the values currently in the buffer
+     */
+    public float min()
+    {
+        float min = 0.0f;
+
+        for(int x = 0; x < mBuffer.length; x++)
+        {
+            if(mBuffer[x] < min)
+            {
+                min = mBuffer[x];
+            }
+        }
+
+        return min;
+    }
+
+    /**
+     * Calculates the average/mean of the values contained in this buffer
+     */
+    public float mean()
+    {
+        double accumulator = 0.0;
+
+        for(float value: mBuffer)
+        {
+            accumulator += value;
+        }
+
+        return (float)(accumulator / mBuffer.length);
     }
 }

src/main/java/io/github/dsheirer/buffer/FloatNativeBuffer.java

@@ -22,6 +22,8 @@ package io.github.dsheirer.buffer;
 import io.github.dsheirer.sample.SampleUtils;
 import io.github.dsheirer.sample.complex.ComplexSamples;
 import io.github.dsheirer.sample.complex.InterleavedComplexSamples;
+
+import java.util.Arrays;
 import java.util.Iterator;
 
 /**
@@ -30,6 +32,7 @@ import java.util.Iterator;
 public class FloatNativeBuffer extends AbstractNativeBuffer
 {
     private float[] mInterleavedComplexSamples;
+    private static final int BUFFER_SIZE = 2048;
 
     /**
      * Constructs an instance
@@ -81,48 +84,51 @@ public class FloatNativeBuffer extends AbstractNativeBuffer
 
     private class ComplexSamplesIterator implements  Iterator<ComplexSamples>
     {
-        private boolean mEmpty;
+        private int mBufferPointer = 0;
 
         @Override
         public boolean hasNext()
         {
-            return !mEmpty;
+            return mBufferPointer < mInterleavedComplexSamples.length;
         }
 
         @Override
         public ComplexSamples next()
         {
-            if(mEmpty)
+            if(!hasNext())
             {
                 throw new IllegalStateException("No more samples");
             }
 
-            mEmpty = true;
-            return SampleUtils.deinterleave(mInterleavedComplexSamples, getTimestamp());
+            float[] chunk = Arrays.copyOfRange(mInterleavedComplexSamples, mBufferPointer, mBufferPointer + BUFFER_SIZE * 2);
+            mBufferPointer += BUFFER_SIZE * 2;
+
+            return SampleUtils.deinterleave(chunk, getTimestamp());
         }
     }
 
     private class InterleavedComplexSamplesIterator implements Iterator<InterleavedComplexSamples>
     {
-        private boolean mEmpty;
-
+        private int mBufferPointer = 0;
 
         @Override
         public boolean hasNext()
         {
-            return !mEmpty;
+            return mBufferPointer < mInterleavedComplexSamples.length;
         }
 
         @Override
         public InterleavedComplexSamples next()
         {
-            if(mEmpty)
+            if(!hasNext())
             {
                 throw new IllegalStateException("No more samples");
             }
 
-            mEmpty = true;
-            return new InterleavedComplexSamples(mInterleavedComplexSamples, getTimestamp());
+            float[] chunk = Arrays.copyOfRange(mInterleavedComplexSamples, mBufferPointer, mBufferPointer + BUFFER_SIZE * 2);
+            mBufferPointer += BUFFER_SIZE * 2;
+
+            return new InterleavedComplexSamples(chunk, getTimestamp());
         }
     }
 }

src/main/java/io/github/dsheirer/buffer/RealCircularBuffer.java

@@ -1,124 +0,0 @@
-/*
- * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>
- * ****************************************************************************
- */
-package io.github.dsheirer.buffer;
-
-/**
- * Circular sample buffer - allocates a buffer and stores samples in a circular
- * fashion, overwriting older samples with newly arrived samples.
- *
- * Can be used as a delay-type buffer, to delay samples by the 'size' amount
- */
-public class RealCircularBuffer
-{
-    float[] mBuffer;
-    int mBufferPointer = 0;
-
-    public RealCircularBuffer(int size)
-    {
-        mBuffer = new float[size];
-    }
-
-    public int getSize()
-    {
-        return mBuffer.length;
-    }
-
-    public float[] getBuffer()
-    {
-        return mBuffer;
-    }
-
-    /**
-     * Puts the new value into the buffer and returns the oldest buffer value
-     * that it replaced
-     *
-     * @param newValue
-     * @return
-     */
-    public float putAndGet(float newValue)
-    {
-        float oldestSample = mBuffer[mBufferPointer];
-
-        put(newValue);
-
-        return oldestSample;
-    }
-
-    /**
-     * Adds the new value to this buffer.
-     */
-    public void put(float newValue)
-    {
-        mBuffer[mBufferPointer] = newValue;
-
-        mBufferPointer++;
-
-        if(mBufferPointer >= mBuffer.length)
-        {
-            mBufferPointer = 0;
-        }
-    }
-
-    /**
-     * Returns the sample at the specified index, where index 0 is the oldest sample and index (length - 1) is the
-     * newest sample.
-     * @param index in range of 0 to length-1
-     * @return value at indexed position
-     */
-
-    public float get(int index)
-    {
-        if(index < mBuffer.length)
-        {
-            int pointer = mBufferPointer + index;
-
-            if(pointer >= mBuffer.length)
-            {
-                pointer -= mBuffer.length;
-            }
-
-            return mBuffer[pointer];
-        }
-        else
-        {
-            throw new ArrayIndexOutOfBoundsException("Index [" + index + "] is not valid for the buffer size of [" +
-                mBuffer.length + "]");
-        }
-    }
-
-    /**
-     * Returns the contents of the circular buffer unwrapped where index 0 is the oldest sample and index length-1
-     * is the newest sample.
-     *
-     * @return array of samples
-     */
-    public float[] get()
-    {
-        float[] samples = new float[mBuffer.length];
-
-        System.arraycopy(mBuffer, mBufferPointer, samples, 0, mBuffer.length - mBufferPointer);
-
-        if(mBufferPointer != 0)
-        {
-            System.arraycopy(mBuffer, 0, samples, mBuffer.length - mBufferPointer, mBufferPointer);
-        }
-
-        return samples;
-    }
-}

src/main/java/io/github/dsheirer/buffer/airspy/hf/AirspyHfNativeBuffer.java

@@ -0,0 +1,132 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.buffer.airspy.hf;
+
+import io.github.dsheirer.buffer.AbstractNativeBuffer;
+import io.github.dsheirer.sample.complex.ComplexSamples;
+import io.github.dsheirer.sample.complex.InterleavedComplexSamples;
+import java.util.Iterator;
+
+/**
+ * Native buffer implementation for Airspy HF+ & Discovery tuners.
+ */
+public class AirspyHfNativeBuffer extends AbstractNativeBuffer
+{
+    public static final float SCALE = 1.0f / 32768.0f;
+    private short[] mInterleavedSamples;
+    private float mAverageDc;
+
+    /**
+     * Constructs an instance.
+     * @param timestamp of the first sample of the buffer
+     * @param interleavedSamples pairs of 16-bit complex samples.
+     */
+    public AirspyHfNativeBuffer(long timestamp, float samplesPerMillisecond, float averageDc, short[] interleavedSamples)
+    {
+        super(timestamp, samplesPerMillisecond);
+        mInterleavedSamples = interleavedSamples;
+        mAverageDc = averageDc;
+    }
+
+    @Override
+    public Iterator<ComplexSamples> iterator()
+    {
+        return new IteratorComplexSamples();
+    }
+
+    @Override
+    public Iterator<InterleavedComplexSamples> iteratorInterleaved()
+    {
+        return new IteratorInterleaved();
+    }
+
+    @Override
+    public int sampleCount()
+    {
+        return mInterleavedSamples.length / 2;
+    }
+
+    /**
+     * Scalar implementation of complex samples buffer iterator
+     */
+    public class IteratorComplexSamples implements Iterator<ComplexSamples>
+    {
+        private boolean mHasNext = true;
+
+        @Override
+        public boolean hasNext()
+        {
+            return mHasNext;
+        }
+
+        @Override
+        public ComplexSamples next()
+        {
+            int length = mInterleavedSamples.length / 2;
+            float[] i = new float[length];
+            float[] q = new float[length];
+
+            int index = 0;
+
+            for(int x = 0; x < mInterleavedSamples.length; x += 2)
+            {
+                index = x / 2;
+                //Native ordering is in Q, I, Q, I ... reverse it to I, Q, I, Q
+                i[index] = (mInterleavedSamples[x + 1] * SCALE) - mAverageDc;
+                q[index] = (mInterleavedSamples[x] * SCALE) - mAverageDc;
+            }
+
+            mHasNext = false;
+
+            return new ComplexSamples(i, q, getTimestamp());
+        }
+    }
+
+    /**
+     * Scalar implementation of interleaved sample buffer iterator.
+     */
+    public class IteratorInterleaved implements Iterator<InterleavedComplexSamples>
+    {
+        private boolean mHasNext = true;
+
+        @Override
+        public boolean hasNext()
+        {
+            return mHasNext;
+        }
+
+        @Override
+        public InterleavedComplexSamples next()
+        {
+            float[] samples = new float[mInterleavedSamples.length];
+
+            for(int x = 0; x < mInterleavedSamples.length; x += 2)
+            {
+                //Native ordering is in Q, I, Q, I ... reverse it to I, Q, I, Q
+                samples[x] = (mInterleavedSamples[x + 1] * SCALE) - mAverageDc;
+                samples[x + 1] = (mInterleavedSamples[x] * SCALE) - mAverageDc;
+            }
+
+            mHasNext = false;
+
+            return new InterleavedComplexSamples(samples, getTimestamp());
+        }
+    }
+}

src/main/java/io/github/dsheirer/buffer/airspy/hf/AirspyHfNativeBufferFactory.java

@@ -0,0 +1,83 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.buffer.airspy.hf;
+
+import io.github.dsheirer.buffer.AbstractNativeBufferFactory;
+import io.github.dsheirer.buffer.DcCorrectionManager;
+import io.github.dsheirer.buffer.INativeBuffer;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.ShortBuffer;
+
+/**
+ * Airspy HF+ native buffer factory.
+ *
+ * Note: the tuner provides 1024 samples in each transfer where samples are 16-bit interleaved complex.
+ */
+public class AirspyHfNativeBufferFactory extends AbstractNativeBufferFactory
+{
+    private DcCorrectionManager mDcCorrectionManager = new DcCorrectionManager();
+
+    /**
+     * Constructs an instance
+     */
+    public AirspyHfNativeBufferFactory()
+    {
+    }
+
+    /**
+     * Converts the samples byte buffer into a native buffer and calculates DC offset
+     * @param samples byte array copied from native memory
+     * @param timestamp of the samples
+     * @return constructed native buffer
+     */
+    @Override
+    public INativeBuffer getBuffer(ByteBuffer samples, long timestamp)
+    {
+        ShortBuffer shortBuffer = samples.order(ByteOrder.LITTLE_ENDIAN).asShortBuffer();
+        short[] converted = new short[shortBuffer.capacity()];
+        shortBuffer.get(converted);
+
+        if(mDcCorrectionManager.shouldCalculateDc())
+        {
+            calculateDc(converted);
+        }
+
+        return new AirspyHfNativeBuffer(timestamp, getSamplesPerMillisecond(), mDcCorrectionManager.getAverageDc(), converted);
+    }
+
+    /**
+     * Calculates the average DC in the sample stream so that it can be subtracted from the samples when the
+     * native buffer is used.
+     * @param samples containing DC offset
+     */
+    private void calculateDc(short[] samples)
+    {
+        float dcAccumulator = 0;
+
+        for(short sample: samples)
+        {
+            dcAccumulator += sample;
+        }
+
+        dcAccumulator /= samples.length;
+        mDcCorrectionManager.adjust(dcAccumulator * AirspyHfNativeBuffer.SCALE);
+    }
+}

src/main/java/io/github/dsheirer/channel/metadata/NowPlayingPanel.java

@@ -33,52 +33,105 @@ import net.miginfocom.swing.MigLayout;
 
 import javax.swing.JPanel;
 
+/**
+ * Swing panel for Now Playing channels table and channel details tab set.
+ */
 public class NowPlayingPanel extends JPanel
 {
-    private ChannelMetadataPanel mChannelMetadataPanel;
-    private ChannelDetailPanel mChannelDetailPanel;
-    private DecodeEventPanel mDecodeEventPanel;
-    private MessageActivityPanel mMessageActivityPanel;
-    private ChannelPowerPanel mChannelPowerPanel;
+    private final ChannelMetadataPanel mChannelMetadataPanel;
+    private final ChannelDetailPanel mChannelDetailPanel;
+    private final DecodeEventPanel mDecodeEventPanel;
+    private final MessageActivityPanel mMessageActivityPanel;
+    private final ChannelPowerPanel mChannelPowerPanel;
+    private JideTabbedPane mTabbedPane;
+    private JideSplitPane mSplitPane;
+    private boolean mDetailTabsVisible;
 
     /**
      * GUI panel that combines the currently decoding channels metadata table and viewers for channel details,
      * messages, events, and spectral view.
      */
     public NowPlayingPanel(PlaylistManager playlistManager, IconModel iconModel, UserPreferences userPreferences,
-                           SettingsManager settingsManager)
+                           SettingsManager settingsManager, boolean detailTabsVisible)
     {
         mChannelDetailPanel = new ChannelDetailPanel(playlistManager.getChannelProcessingManager());
         mDecodeEventPanel = new DecodeEventPanel(iconModel, userPreferences, playlistManager.getAliasModel());
         mMessageActivityPanel = new MessageActivityPanel(userPreferences);
         mChannelMetadataPanel = new ChannelMetadataPanel(playlistManager, iconModel, userPreferences);
         mChannelPowerPanel = new ChannelPowerPanel(playlistManager, settingsManager);
+        mDetailTabsVisible = detailTabsVisible;
 
         init();
     }
 
+    /**
+     * Change the visibility of the channel details tabs panel.
+     * @param visible true to show or false to hide.
+     */
+    public void setDetailTabsVisible(boolean visible)
+    {
+        //Only adjust if there is a change in state
+        if(visible ^ mDetailTabsVisible)
+        {
+            mDetailTabsVisible = visible;
+
+            if(mDetailTabsVisible)
+            {
+                getSplitPane().add(getTabbedPane());
+            }
+            else
+            {
+                getSplitPane().remove(getTabbedPane());
+            }
+
+            revalidate();
+        }
+    }
+
+    private JideTabbedPane getTabbedPane()
+    {
+        if(mTabbedPane == null)
+        {
+            mTabbedPane = new JideTabbedPane();
+            mTabbedPane.addTab("Details", mChannelDetailPanel);
+            mTabbedPane.addTab("Events", mDecodeEventPanel);
+            mTabbedPane.addTab("Messages", mMessageActivityPanel);
+            mTabbedPane.addTab("Channel", mChannelPowerPanel);
+            mTabbedPane.setFont(this.getFont());
+            mTabbedPane.setForeground(Color.BLACK);
+            //Register state change listener to toggle visibility state for channel tab to turn-on/off FFT processing
+            mTabbedPane.addChangeListener(e -> mChannelPowerPanel.setPanelVisible(getTabbedPane().getSelectedIndex() == getTabbedPane()
+                    .indexOfComponent(mChannelPowerPanel)));
+        }
+
+        return mTabbedPane;
+    }
+
+    /**
+     * Split pane for channels table and channel details tabs.
+     */
+    private JideSplitPane getSplitPane()
+    {
+        if(mSplitPane == null)
+        {
+            mSplitPane = new JideSplitPane(JideSplitPane.VERTICAL_SPLIT);
+            mSplitPane.setShowGripper(true);
+        }
+
+        return mSplitPane;
+    }
+
     private void init()
     {
         setLayout( new MigLayout( "insets 0 0 0 0", "[grow,fill]", "[grow,fill]") );
+        getSplitPane().add(mChannelMetadataPanel);
 
-        JideTabbedPane tabbedPane = new JideTabbedPane();
-        tabbedPane.addTab("Details", mChannelDetailPanel);
-        tabbedPane.addTab("Events", mDecodeEventPanel);
-        tabbedPane.addTab("Messages", mMessageActivityPanel);
-        tabbedPane.addTab("Channel", mChannelPowerPanel);
-        tabbedPane.setFont(this.getFont());
-        tabbedPane.setForeground(Color.BLACK);
-
-        //Register state change listener to toggle visibility state for channel tab to turn-on/off FFT processing
-        tabbedPane.addChangeListener(e -> mChannelPowerPanel.setPanelVisible(tabbedPane.getSelectedIndex() == tabbedPane
-                .indexOfComponent(mChannelPowerPanel)));
-
-        JideSplitPane splitPane = new JideSplitPane(JideSplitPane.VERTICAL_SPLIT);
-        splitPane.setShowGripper(true);
-        splitPane.add(mChannelMetadataPanel);
-        splitPane.add(tabbedPane);
-        add(splitPane);
+        if(mDetailTabsVisible)
+        {
+            getSplitPane().add(getTabbedPane());
+        }
 
+        add(getSplitPane());
         mChannelMetadataPanel.addProcessingChainSelectionListener(mChannelDetailPanel);
         mChannelMetadataPanel.addProcessingChainSelectionListener(mDecodeEventPanel);
         mChannelMetadataPanel.addProcessingChainSelectionListener(mMessageActivityPanel);

src/main/java/io/github/dsheirer/channel/state/DecoderStateEvent.java

@@ -73,7 +73,7 @@ public class DecoderStateEvent
     {
         StringBuilder sb = new StringBuilder();
 
-        sb.append("Decoder State Event - source[").append(mSource.getClass())
+        sb.append("Decoder State Event - source[").append(mSource != null ? mSource.getClass() : "null")
                 .append("] event[").append(mEvent)
                 .append("] state[").append(mState)
                 .append("] timeslot[").append(mTimeslot)

src/main/java/io/github/dsheirer/controller/ControllerPanel.java

@@ -59,17 +59,25 @@ public class ControllerPanel extends JPanel
 
     public ControllerPanel(PlaylistManager playlistManager, AudioPlaybackManager audioPlaybackManager,
                            IconModel iconModel, MapService mapService, SettingsManager settingsManager,
-                           TunerManager tunerManager, UserPreferences userPreferences)
+                           TunerManager tunerManager, UserPreferences userPreferences, boolean detailTabsVisible)
     {
         mAudioPanel = new AudioPanel(iconModel, userPreferences, settingsManager, audioPlaybackManager,
             playlistManager.getAliasModel());
-        mNowPlayingPanel = new NowPlayingPanel(playlistManager, iconModel, userPreferences, settingsManager);
+        mNowPlayingPanel = new NowPlayingPanel(playlistManager, iconModel, userPreferences, settingsManager, detailTabsVisible);
         mMapPanel = new MapPanel(mapService, playlistManager.getAliasModel(), iconModel, settingsManager);
         mTunerManagerPanel = new TunerViewPanel(tunerManager, userPreferences);
 
         init();
     }
 
+    /**
+     * Now playing panel.
+     */
+    public NowPlayingPanel getNowPlayingPanel()
+    {
+        return mNowPlayingPanel;
+    }
+
     private void init()
     {
         setLayout(new MigLayout("insets 0 0 0 0 ", "[grow,fill]", "[]0[grow,fill]0[]"));
@@ -97,8 +105,8 @@ public class ControllerPanel extends JPanel
         mTabbedPane.addTab("Map", mMapPanel);
         mTabbedPane.addTab("Tuners", mTunerManagerPanel);
 
-        Icon gearIcon = IconFontSwing.buildIcon(FontAwesome.COG, 20, Color.DARK_GRAY);
-        mTabbedPane.addTab("Playlist Editor", gearIcon, new JLabel("Show Playlist Manager"));
+        Icon playIcon = IconFontSwing.buildIcon(FontAwesome.PLAY_CIRCLE_O, 20, Color.DARK_GRAY);
+        mTabbedPane.addTab("Playlist Editor", playIcon, new JLabel("Show Playlist Manager"));
         mSettingsTabIndex = mTabbedPane.getTabCount() - 1;
 
         //Set preferred size to influence the split between these panels

src/main/java/io/github/dsheirer/controller/channel/ChannelAutoStartFrame.java

@@ -1,7 +1,6 @@
 /*
- * ******************************************************************************
- * sdrtrunk
- * Copyright (C) 2014-2018 Dennis Sheirer
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -15,22 +14,13 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
- * *****************************************************************************
+ * ****************************************************************************
  */
 package io.github.dsheirer.controller.channel;
 
+import io.github.dsheirer.preference.UserPreferences;
 import io.github.dsheirer.sample.Listener;
 import io.github.dsheirer.util.ThreadPool;
-import net.miginfocom.swing.MigLayout;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import javax.swing.JButton;
-import javax.swing.JFrame;
-import javax.swing.JLabel;
-import javax.swing.JPanel;
-import javax.swing.JScrollPane;
-import javax.swing.JTable;
 import java.awt.Dimension;
 import java.awt.EventQueue;
 import java.awt.event.ActionEvent;
@@ -41,12 +31,21 @@ import java.util.List;
 import java.util.concurrent.ScheduledFuture;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
+import net.miginfocom.swing.MigLayout;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JScrollPane;
+import javax.swing.JTable;
 
 public class ChannelAutoStartFrame extends JFrame
 {
     private final static Logger mLog = LoggerFactory.getLogger(ChannelAutoStartFrame.class);
 
-    private static final int COUNTDOWN_SECONDS = 10;
     private Listener<ChannelEvent> mChannelEventListener;
     private List<Channel> mChannels;
 
@@ -55,7 +54,7 @@ public class ChannelAutoStartFrame extends JFrame
     private JButton mCancelButton;
     private JTable mChannelTable;
     private AtomicBoolean mChannelsStarted = new AtomicBoolean();
-
+    private int mAutoStartTimeoutSeconds;
     private ScheduledFuture<?> mTimerFuture;
 
     /**
@@ -66,10 +65,12 @@ public class ChannelAutoStartFrame extends JFrame
      * @param listener to receive channel start/enable request(s)
      * @param channels to auto-start
      */
-    public ChannelAutoStartFrame(Listener<ChannelEvent> listener, List<Channel> channels)
+    public ChannelAutoStartFrame(Listener<ChannelEvent> listener, List<Channel> channels, UserPreferences userPreferences)
     {
         mChannelEventListener = listener;
         mChannels = channels;
+        mAutoStartTimeoutSeconds = userPreferences.getApplicationPreference().getChannelAutoStartTimeout();
+
         init();
 
         EventQueue.invokeLater(() -> {
@@ -100,7 +101,7 @@ public class ChannelAutoStartFrame extends JFrame
             "[][][grow,fill][]"));
         panel.add(new JLabel("The following channels will be automatically"), "span");
 
-        mCountdownLabel = new JLabel(getCountdownText(COUNTDOWN_SECONDS));
+        mCountdownLabel = new JLabel(getCountdownText(mAutoStartTimeoutSeconds));
         panel.add(mCountdownLabel, "span");
 
         panel.add(new JScrollPane(getChannelTable()), "span");
@@ -220,7 +221,7 @@ public class ChannelAutoStartFrame extends JFrame
      */
     public class CountdownTimer implements Runnable
     {
-        private int mCount = COUNTDOWN_SECONDS;
+        private int mCount = mAutoStartTimeoutSeconds;
 
         @Override
         public void run()

src/main/java/io/github/dsheirer/controller/channel/ChannelProcessingManager.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -365,7 +365,7 @@ public class ChannelProcessingManager implements Listener<ChannelEvent>
      * @param request containing channel and other details
      * @throws ChannelException if a source is not available for the channel
      */
-    private void startProcessing(ChannelStartProcessingRequest request) throws ChannelException
+    private synchronized void startProcessing(ChannelStartProcessingRequest request) throws ChannelException
     {
         Channel channel = request.getChannel();
 
@@ -623,30 +623,27 @@ public class ChannelProcessingManager implements Listener<ChannelEvent>
                 Platform.runLater(() -> channel.setProcessing(false));
             }
 
-            //Since the processing chain's source will block on stop(), throw it to the thread pool to run
-            ThreadPool.CACHED.submit(() -> {
-                try
-                {
-                    processingChain.stop();
-                    processingChain.removeEventLoggingModules();
-                    processingChain.removeRecordingModules();
+            try
+            {
+                processingChain.stop();
+                processingChain.removeEventLoggingModules();
+                processingChain.removeRecordingModules();
 
-                    //Deregister channel from receive frequency correction events to show in the spectral display (hack!)
-                    processingChain.removeFrequencyChangeListener(channel);
-                    channel.resetFrequencyCorrection();
+                //Deregister channel from receive frequency correction events to show in the spectral display (hack!)
+                processingChain.removeFrequencyChangeListener(channel);
+                channel.resetFrequencyCorrection();
 
-                    mChannelEventBroadcaster.broadcast(new ChannelEvent(channel, ChannelEvent.Event.NOTIFICATION_PROCESSING_STOP));
-                    mChannelEventBroadcaster.removeListener(processingChain);
+                mChannelEventBroadcaster.broadcast(new ChannelEvent(channel, ChannelEvent.Event.NOTIFICATION_PROCESSING_STOP));
+                mChannelEventBroadcaster.removeListener(processingChain);
 
-                    //Unregister for event bus requests and notifications
-                    processingChain.getEventBus().unregister(ChannelProcessingManager.this);
-                    processingChain.dispose();
-                }
-                catch(Exception e)
-                {
-                    mLog.error("Error during shutdown of processing chain for channel [" + channel.getName() + "}", e);
-                }
-            });
+                //Unregister for event bus requests and notifications
+                processingChain.getEventBus().unregister(ChannelProcessingManager.this);
+                processingChain.dispose();
+            }
+            catch(Exception e)
+            {
+                mLog.error("Error during shutdown of processing chain for channel [" + channel.getName() + "}", e);
+            }
         }
     }
 

src/main/java/io/github/dsheirer/dsp/am/AmDemodulatorCalibration.java

@@ -0,0 +1,286 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.dsp.am;
+
+import io.github.dsheirer.dsp.magnitude.IMagnitudeCalculator;
+import io.github.dsheirer.dsp.magnitude.MagnitudeFactory;
+import io.github.dsheirer.vector.calibrate.Calibration;
+import io.github.dsheirer.vector.calibrate.CalibrationException;
+import io.github.dsheirer.vector.calibrate.CalibrationType;
+import io.github.dsheirer.vector.calibrate.Implementation;
+import org.apache.commons.math3.stat.descriptive.moment.Mean;
+
+/**
+ * Calibrates AM demodulator options
+ */
+public class AmDemodulatorCalibration extends Calibration
+{
+    private static final int BUFFER_SIZE = 2048;
+    private static final int ITERATION_DURATION_MS = 1000;
+    private static final int WARMUP_ITERATIONS = 5;
+    private static final int TEST_ITERATIONS = 5;
+    private IMagnitudeCalculator mMagnitudeCalculator = MagnitudeFactory.getMagnitudeCalculator();
+    private IAmDemodulator mScalarDemodulator = new ScalarAMDemodulator(500.0f);
+    private IAmDemodulator mVectorDemodulator64 = new VectorAMDemodulator64(500.0f);
+    private IAmDemodulator mVectorDemodulator128 = new VectorAMDemodulator128(500.0f);
+    private IAmDemodulator mVectorAMDemodulator256 = new VectorAMDemodulator256(500.0f);
+    private IAmDemodulator mVectorAMDemodulator512 = new VectorAMDemodulator512(500.0f);
+
+
+    /**
+     * Constructs an instance
+     */
+    public AmDemodulatorCalibration()
+    {
+        super(CalibrationType.AM_DEMODULATOR);
+    }
+
+    @Override public void calibrate() throws CalibrationException
+    {
+        float[] magnitude = getFloatSamples(BUFFER_SIZE);
+
+        Mean scalarMean = new Mean();
+
+        for(int x = 0; x < WARMUP_ITERATIONS; x++)
+        {
+            long score = testScalar(magnitude);
+            scalarMean.increment(score);
+        }
+
+        mLog.info("AM DEMODULATOR WARMUP - SCALAR: " + DECIMAL_FORMAT.format(scalarMean.getResult()));
+
+        Mean vector64Mean = new Mean();
+
+        for(int x = 0; x < WARMUP_ITERATIONS; x++)
+        {
+            long score = testVector64(magnitude);
+            vector64Mean.increment(score);
+        }
+
+        mLog.info("AM DEMODULATOR WARMUP - VECTOR 64: " + DECIMAL_FORMAT.format(vector64Mean.getResult()));
+
+        Mean vector128Mean = new Mean();
+
+        for(int x = 0; x < WARMUP_ITERATIONS; x++)
+        {
+            long score = testVector128(magnitude);
+            vector128Mean.increment(score);
+        }
+
+        mLog.info("AM DEMODULATOR WARMUP - VECTOR 128: " + DECIMAL_FORMAT.format(vector128Mean.getResult()));
+
+        Mean vector256Mean = new Mean();
+
+        for(int x = 0; x < WARMUP_ITERATIONS; x++)
+        {
+            long score = testVector256(magnitude);
+            vector256Mean.increment(score);
+        }
+
+        mLog.info("AM DEMODULATOR WARMUP - VECTOR 256: " + DECIMAL_FORMAT.format(vector256Mean.getResult()));
+
+        Mean vector512Mean = new Mean();
+
+        for(int x = 0; x < WARMUP_ITERATIONS; x++)
+        {
+            long score = testVector512(magnitude);
+            vector512Mean.increment(score);
+        }
+
+        mLog.info("AM DEMODULATOR WARMUP - VECTOR 512: " + DECIMAL_FORMAT.format(vector512Mean.getResult()));
+
+        //Start tests
+        scalarMean.clear();
+
+        for(int x = 0; x < TEST_ITERATIONS; x++)
+        {
+            long score = testScalar(magnitude);
+            scalarMean.increment(score);
+        }
+
+        mLog.info("AM DEMODULATOR - SCALAR: " + DECIMAL_FORMAT.format(scalarMean.getResult()));
+
+        vector64Mean.clear();
+
+        for(int x = 0; x < TEST_ITERATIONS; x++)
+        {
+            long score = testVector64(magnitude);
+            vector64Mean.increment(score);
+        }
+
+        mLog.info("AM DEMODULATOR - VECTOR 64: " + DECIMAL_FORMAT.format(vector64Mean.getResult()));
+
+        vector128Mean.clear();
+
+        for(int x = 0; x < TEST_ITERATIONS; x++)
+        {
+            long score = testVector128(magnitude);
+            vector128Mean.increment(score);
+        }
+
+        mLog.info("AM DEMODULATOR - VECTOR 128: " + DECIMAL_FORMAT.format(vector128Mean.getResult()));
+
+        vector256Mean.clear();
+
+        for(int x = 0; x < TEST_ITERATIONS; x++)
+        {
+            long score = testVector256(magnitude);
+            vector256Mean.increment(score);
+        }
+
+        mLog.info("AM DEMODULATOR - VECTOR 256: " + DECIMAL_FORMAT.format(vector256Mean.getResult()));
+
+        vector512Mean.clear();
+
+        for(int x = 0; x < TEST_ITERATIONS; x++)
+        {
+            long score = testVector512(magnitude);
+            vector512Mean.increment(score);
+        }
+
+        mLog.info("AM DEMODULATOR - VECTOR 512: " + DECIMAL_FORMAT.format(vector512Mean.getResult()));
+
+        Implementation optimal = Implementation.SCALAR;
+        double optimalResult = scalarMean.getResult();
+
+        if(vector64Mean.getResult() > optimalResult)
+        {
+            optimal = Implementation.VECTOR_SIMD_64;
+            optimalResult = vector64Mean.getResult();
+        }
+
+        if(vector128Mean.getResult() > optimalResult)
+        {
+            optimal = Implementation.VECTOR_SIMD_128;
+            optimalResult = vector128Mean.getResult();
+        }
+
+        if(vector256Mean.getResult() > optimalResult)
+        {
+            optimal = Implementation.VECTOR_SIMD_256;
+            optimalResult = vector256Mean.getResult();
+        }
+
+        if(vector512Mean.getResult() > optimalResult)
+        {
+            optimal = Implementation.VECTOR_SIMD_512;
+        }
+
+        setImplementation(optimal);
+
+        mLog.info("AM DEMODULATOR - SET OPTIMAL IMPLEMENTATION TO:" + getImplementation());
+    }
+
+    private long testScalar(float[] magnitude)
+    {
+
+        double accumulator = 0.0;
+        long count = 0;
+
+        long start = System.currentTimeMillis();
+
+        while((System.currentTimeMillis() - start) < ITERATION_DURATION_MS)
+        {
+            float[] demodulated = mScalarDemodulator.demodulateMagnitude(magnitude);
+            accumulator += demodulated[1];
+            count++;
+        }
+
+        return count + (long)(accumulator * 0);
+    }
+
+    private long testVector64(float[] magnitude)
+    {
+        double accumulator = 0.0;
+        long count = 0;
+        long start = System.currentTimeMillis();
+
+        while((System.currentTimeMillis() - start) < ITERATION_DURATION_MS)
+        {
+            float[] demodulated = mVectorDemodulator64.demodulateMagnitude(magnitude);
+            accumulator += demodulated[1];
+            count++;
+        }
+
+        return count + (long)(accumulator * 0);
+    }
+
+    private long testVector128(float[] magnitude)
+    {
+        double accumulator = 0.0;
+        long count = 0;
+        long start = System.currentTimeMillis();
+
+        while((System.currentTimeMillis() - start) < ITERATION_DURATION_MS)
+        {
+            float[] demodulated = mVectorDemodulator128.demodulateMagnitude(magnitude);
+            accumulator += demodulated[1];
+            count++;
+        }
+
+        return count + (long)(accumulator * 0);
+    }
+
+    private long testVector256(float[] magnitude)
+    {
+        double accumulator = 0.0;
+        long count = 0;
+        long start = System.currentTimeMillis();
+
+        while((System.currentTimeMillis() - start) < ITERATION_DURATION_MS)
+        {
+            float[] demodulated = mVectorAMDemodulator256.demodulateMagnitude(magnitude);
+            accumulator += demodulated[1];
+            count++;
+        }
+
+        return count + (long)(accumulator * 0);
+    }
+
+    private long testVector512(float[] magnitude)
+    {
+        double accumulator = 0.0;
+        long count = 0;
+        long start = System.currentTimeMillis();
+
+        while((System.currentTimeMillis() - start) < ITERATION_DURATION_MS)
+        {
+            float[] demodulated = mVectorAMDemodulator512.demodulateMagnitude(magnitude);
+            accumulator += demodulated[1];
+            count++;
+        }
+
+        return count + (long)(accumulator * 0);
+    }
+
+    public static void main(String[] args)
+    {
+        AmDemodulatorCalibration calibration = new AmDemodulatorCalibration();
+
+        try
+        {
+            calibration.calibrate();
+        }
+        catch(Exception e)
+        {
+            mLog.error("Error during calibration", e);
+        }
+    }
+}

src/main/java/io/github/dsheirer/dsp/am/AmDemodulatorFactory.java

@@ -0,0 +1,64 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.dsp.am;
+
+import io.github.dsheirer.vector.calibrate.CalibrationManager;
+import io.github.dsheirer.vector.calibrate.CalibrationType;
+import io.github.dsheirer.vector.calibrate.Implementation;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Factory for creating AM demodulators
+ */
+public class AmDemodulatorFactory
+{
+    private static final Logger mLog = LoggerFactory.getLogger(AmDemodulatorFactory.class);
+
+    /**
+     * Creates the optimal AM demodulator using calibration data to select the optimal
+     * implementation from scalar and vector options.
+     * @return demodulator instance
+     */
+    public static IAmDemodulator getAmDemodulator(float gain)
+    {
+        Implementation implementation = CalibrationManager.getInstance().getImplementation(CalibrationType.AM_DEMODULATOR);
+
+        switch(implementation)
+        {
+            case VECTOR_SIMD_64:
+                return new VectorAMDemodulator64(gain);
+            case VECTOR_SIMD_128:
+                return new VectorAMDemodulator128(gain);
+            case VECTOR_SIMD_256:
+                return new VectorAMDemodulator256(gain);
+            case VECTOR_SIMD_512:
+                return new VectorAMDemodulator512(gain);
+            case VECTOR_SIMD_PREFERRED:
+                return new VectorAMDemodulator64(gain);
+            case SCALAR:
+            case UNCALIBRATED:
+                return new ScalarAMDemodulator(gain);
+            default:
+                mLog.warn("Unrecognized optimal operation for AM demodulator: " + implementation.name());
+                return new ScalarAMDemodulator(gain);
+        }
+    }
+}

src/main/java/io/github/dsheirer/dsp/am/IAmDemodulator.java

@@ -1,3 +1,22 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
 package io.github.dsheirer.dsp.am;
 
 /**
@@ -6,10 +25,9 @@ package io.github.dsheirer.dsp.am;
 public interface IAmDemodulator
 {
     /**
-     * Demodulate the complex I & Q sample arrays
-     * @param i samples
-     * @param q samples
-     * @return demodulated samples.
+     * Demodulates an array of vector squared magnitudes.
+     * @param magnitude values that are squared.
+     * @return demodulated samples
      */
-    float[] demodulate(float[] i, float[] q);
+    float[] demodulateMagnitude(float[] magnitude);
 }

src/main/java/io/github/dsheirer/dsp/am/ScalarAMDemodulator.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -23,7 +23,7 @@ import org.apache.commons.math3.util.FastMath;
 /**
  * Performs AM demodulation on baseband I/Q samples to produce demodulated float output.
  */
-public class AMDemodulator implements IAmDemodulator
+public class ScalarAMDemodulator implements IAmDemodulator
 {
     private float mGain;
 
@@ -32,7 +32,7 @@ public class AMDemodulator implements IAmDemodulator
      *
      * @param gain to apply to demodulated output samples.
      */
-    public AMDemodulator(float gain)
+    public ScalarAMDemodulator(float gain)
     {
         mGain = gain;
     }
@@ -57,13 +57,13 @@ public class AMDemodulator implements IAmDemodulator
         return (float) FastMath.sqrt((inphase * inphase) + (quadrature * quadrature)) * mGain;
     }
 
-    @Override public float[] demodulate(float[] i, float[] q)
+    @Override
+    public float[] demodulateMagnitude(float[] magnitude)
     {
-        float[] demodulated = new float[i.length];
-
-        for(int x = 0; x < i.length; x++)
+        float[] demodulated = new float[magnitude.length];
+        for(int x = 0; x < magnitude.length; x++)
         {
-            demodulated[x] = (float)FastMath.sqrt((i[x] * i[x]) + (q[x] * q[x])) * mGain;
+            demodulated[x] = (float)FastMath.sqrt(magnitude[x]) * mGain;
         }
 
         return demodulated;

src/main/java/io/github/dsheirer/dsp/am/SquelchingAMDemodulator.java

@@ -0,0 +1,161 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.dsp.am;
+
+import io.github.dsheirer.dsp.fm.ISquelchingDemodulator;
+import io.github.dsheirer.dsp.magnitude.IMagnitudeCalculator;
+import io.github.dsheirer.dsp.magnitude.MagnitudeFactory;
+import io.github.dsheirer.dsp.squelch.AdaptiveSquelch;
+import io.github.dsheirer.sample.Listener;
+import io.github.dsheirer.source.SourceEvent;
+
+/**
+ * AM demodulator with integrated squelch control.
+ */
+public class SquelchingAMDemodulator implements ISquelchingDemodulator, Listener<SourceEvent>
+{
+    private static final float ZERO = 0.0f;
+    private final IMagnitudeCalculator mMagnitudeCalculator = MagnitudeFactory.getMagnitudeCalculator();
+    private final IAmDemodulator mAmDemodulator;
+    private final AdaptiveSquelch mAdaptiveSquelch;
+    private boolean mSquelchChanged = false;
+
+    /**
+     * Constructs an instance
+     * @param gain to apply to the demodulated AM samples (e.g. 500.0f)
+     * @param alpha decay value of the single pole IIR filter in range: 0.0 - 1.0.  The smaller the alpha value,
+     * the slower the squelch response.
+     * @param squelchThreshold in decibels.  Signal power must exceed this threshold value for unsquelch.
+     * @param squelchAutoTrack to enable the squelch noise floor auto tracking feature.
+     */
+    public SquelchingAMDemodulator(float gain, float alpha, float squelchThreshold, boolean squelchAutoTrack)
+    {
+        mAmDemodulator = AmDemodulatorFactory.getAmDemodulator(gain);
+        mAdaptiveSquelch = new AdaptiveSquelch(alpha, squelchThreshold, squelchAutoTrack);
+    }
+
+    /**
+     * Set or update the sample rate for the squelch to adjust the power level notification rate.
+     * @param sampleRate in hertz
+     */
+    public void setSampleRate(int sampleRate)
+    {
+        mAdaptiveSquelch.setSampleRate(sampleRate);
+    }
+
+    /**
+     * Registers the listener to receive notifications of squelch change events from the power squelch.
+     */
+    public void setSourceEventListener(Listener<SourceEvent> listener)
+    {
+        mAdaptiveSquelch.setSourceEventListener(listener);
+    }
+
+    /**
+     * Demodulates the complex sample arrays.
+     * @param i inphase sample array
+     * @param q quadrature sample array
+     * @return demodulated AM samples with gain applied.
+     */
+    public float[] demodulate(float[] i, float[] q)
+    {
+        mAdaptiveSquelch.setSquelchChanged(false);
+        setSquelchChanged(false);
+
+        float[] magnitude = mMagnitudeCalculator.calculate(i, q);
+        float[] demodulated = mAmDemodulator.demodulateMagnitude(magnitude);
+
+        for(int x = 0; x < i.length; x++)
+        {
+            mAdaptiveSquelch.process(magnitude[x]);
+
+            if(!(mAdaptiveSquelch.isUnmuted()))
+            {
+                demodulated[x] = ZERO;
+            }
+
+            if(mAdaptiveSquelch.isSquelchChanged())
+            {
+                setSquelchChanged(true);
+            }
+        }
+
+        return demodulated;
+    }
+
+    /**
+     * Sets the threshold for squelch control
+     * @param threshold (dB)
+     */
+    public void setSquelchThreshold(float threshold)
+    {
+        mAdaptiveSquelch.setSquelchThreshold(threshold);
+    }
+
+    @Override
+    public void setSquelchAutoTrack(boolean autoTrack)
+    {
+        mAdaptiveSquelch.setSquelchAutoTrack(autoTrack);
+    }
+
+    /**
+     * Indicates if the squelch state has changed during the processing of buffer(s)
+     */
+    public boolean isSquelchChanged()
+    {
+        return mSquelchChanged;
+    }
+
+    /**
+     * Sets or resets the squelch changed flag.
+     */
+    private void setSquelchChanged(boolean changed)
+    {
+        mSquelchChanged = changed;
+    }
+
+    /**
+     * Indicates if the squelch state is currently muted
+     */
+    public boolean isMuted()
+    {
+        return mAdaptiveSquelch.isMuted();
+    }
+
+    /**
+     * Process source events initiated by the timer and end-user.
+     * @param sourceEvent to process.
+     */
+    @Override
+    public void receive(SourceEvent sourceEvent)
+    {
+        switch(sourceEvent.getEvent())
+        {
+            //Only forward squelch threshold & auto-track request events
+            case REQUEST_CURRENT_SQUELCH_THRESHOLD:
+            case REQUEST_CHANGE_SQUELCH_THRESHOLD:
+            case REQUEST_CURRENT_SQUELCH_AUTO_TRACK:
+            case REQUEST_CHANGE_SQUELCH_AUTO_TRACK:
+            {
+                mAdaptiveSquelch.receive(sourceEvent);
+            }
+        }
+    }
+}

src/main/java/io/github/dsheirer/dsp/am/VectorAMDemodulator128.java

@@ -0,0 +1,83 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+package io.github.dsheirer.dsp.am;
+
+import io.github.dsheirer.dsp.magnitude.IMagnitudeCalculator;
+import io.github.dsheirer.dsp.magnitude.MagnitudeFactory;
+import io.github.dsheirer.vector.VectorUtilities;
+import jdk.incubator.vector.FloatVector;
+import jdk.incubator.vector.VectorSpecies;
+import org.apache.commons.math3.util.FastMath;
+
+/**
+ * Performs AM demodulation on baseband I/Q samples to produce demodulated float output.
+ */
+public class VectorAMDemodulator128 implements IAmDemodulator
+{
+    private static final VectorSpecies<Float> VECTOR_SPECIES = FloatVector.SPECIES_128;
+    private float mGain;
+    private IMagnitudeCalculator mMagnitudeCalculator = MagnitudeFactory.getMagnitudeCalculator();
+
+    /**
+     * Constructs this demodulator where the specified gain is applied to demodulated output samples.
+     *
+     * @param gain to apply to demodulated output samples.
+     */
+    public VectorAMDemodulator128(float gain)
+    {
+        mGain = gain;
+    }
+
+    /**
+     * Sets the gain to the specified level.
+     */
+    public void setGain(float gain)
+    {
+        mGain = gain;
+    }
+
+    /**
+     * Demodulates the comples I/Q sample and returns the demodulated output sample.
+     *
+     * @param inphase sample
+     * @param quadrature sample
+     * @return AM demodulated sample
+     */
+    public float demodulate(float inphase, float quadrature)
+    {
+        return (float) FastMath.sqrt((inphase * inphase) + (quadrature * quadrature)) * mGain;
+    }
+
+    @Override
+    public float[] demodulateMagnitude(float[] magnitude)
+    {
+        VectorUtilities.checkArrayLength(magnitude, VECTOR_SPECIES);
+        FloatVector gain = FloatVector.broadcast(VECTOR_SPECIES, mGain);
+        float[] demodulated = new float[magnitude.length];
+
+        FloatVector vector;
+        for(int x = 0; x < magnitude.length; x += VECTOR_SPECIES.length())
+        {
+            vector = FloatVector.fromArray(VECTOR_SPECIES, magnitude, x);
+            vector.sqrt().mul(gain).intoArray(demodulated, x);
+        }
+
+        return demodulated;
+    }
+}

src/main/java/io/github/dsheirer/dsp/am/VectorAMDemodulator256.java

@@ -0,0 +1,83 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+package io.github.dsheirer.dsp.am;
+
+import io.github.dsheirer.dsp.magnitude.IMagnitudeCalculator;
+import io.github.dsheirer.dsp.magnitude.MagnitudeFactory;
+import io.github.dsheirer.vector.VectorUtilities;
+import jdk.incubator.vector.FloatVector;
+import jdk.incubator.vector.VectorSpecies;
+import org.apache.commons.math3.util.FastMath;
+
+/**
+ * Performs AM demodulation on baseband I/Q samples to produce demodulated float output.
+ */
+public class VectorAMDemodulator256 implements IAmDemodulator
+{
+    private static final VectorSpecies<Float> VECTOR_SPECIES = FloatVector.SPECIES_256;
+    private float mGain;
+    private IMagnitudeCalculator mMagnitudeCalculator = MagnitudeFactory.getMagnitudeCalculator();
+
+    /**
+     * Constructs this demodulator where the specified gain is applied to demodulated output samples.
+     *
+     * @param gain to apply to demodulated output samples.
+     */
+    public VectorAMDemodulator256(float gain)
+    {
+        mGain = gain;
+    }
+
+    /**
+     * Sets the gain to the specified level.
+     */
+    public void setGain(float gain)
+    {
+        mGain = gain;
+    }
+
+    /**
+     * Demodulates the comples I/Q sample and returns the demodulated output sample.
+     *
+     * @param inphase sample
+     * @param quadrature sample
+     * @return AM demodulated sample
+     */
+    public float demodulate(float inphase, float quadrature)
+    {
+        return (float) FastMath.sqrt((inphase * inphase) + (quadrature * quadrature)) * mGain;
+    }
+
+    @Override
+    public float[] demodulateMagnitude(float[] magnitude)
+    {
+        VectorUtilities.checkArrayLength(magnitude, VECTOR_SPECIES);
+        FloatVector gain = FloatVector.broadcast(VECTOR_SPECIES, mGain);
+        float[] demodulated = new float[magnitude.length];
+
+        FloatVector vector;
+        for(int x = 0; x < magnitude.length; x += VECTOR_SPECIES.length())
+        {
+            vector = FloatVector.fromArray(VECTOR_SPECIES, magnitude, x);
+            vector.sqrt().mul(gain).intoArray(demodulated, x);
+        }
+
+        return demodulated;
+    }
+}

src/main/java/io/github/dsheirer/dsp/am/VectorAMDemodulator512.java

@@ -0,0 +1,83 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+package io.github.dsheirer.dsp.am;
+
+import io.github.dsheirer.dsp.magnitude.IMagnitudeCalculator;
+import io.github.dsheirer.dsp.magnitude.MagnitudeFactory;
+import io.github.dsheirer.vector.VectorUtilities;
+import jdk.incubator.vector.FloatVector;
+import jdk.incubator.vector.VectorSpecies;
+import org.apache.commons.math3.util.FastMath;
+
+/**
+ * Performs AM demodulation on baseband I/Q samples to produce demodulated float output.
+ */
+public class VectorAMDemodulator512 implements IAmDemodulator
+{
+    private static final VectorSpecies<Float> VECTOR_SPECIES = FloatVector.SPECIES_512;
+    private float mGain;
+    private IMagnitudeCalculator mMagnitudeCalculator = MagnitudeFactory.getMagnitudeCalculator();
+
+    /**
+     * Constructs this demodulator where the specified gain is applied to demodulated output samples.
+     *
+     * @param gain to apply to demodulated output samples.
+     */
+    public VectorAMDemodulator512(float gain)
+    {
+        mGain = gain;
+    }
+
+    /**
+     * Sets the gain to the specified level.
+     */
+    public void setGain(float gain)
+    {
+        mGain = gain;
+    }
+
+    /**
+     * Demodulates the comples I/Q sample and returns the demodulated output sample.
+     *
+     * @param inphase sample
+     * @param quadrature sample
+     * @return AM demodulated sample
+     */
+    public float demodulate(float inphase, float quadrature)
+    {
+        return (float) FastMath.sqrt((inphase * inphase) + (quadrature * quadrature)) * mGain;
+    }
+
+    @Override
+    public float[] demodulateMagnitude(float[] magnitude)
+    {
+        VectorUtilities.checkArrayLength(magnitude, VECTOR_SPECIES);
+        FloatVector gain = FloatVector.broadcast(VECTOR_SPECIES, mGain);
+        float[] demodulated = new float[magnitude.length];
+
+        FloatVector vector;
+        for(int x = 0; x < magnitude.length; x += VECTOR_SPECIES.length())
+        {
+            vector = FloatVector.fromArray(VECTOR_SPECIES, magnitude, x);
+            vector.sqrt().mul(gain).intoArray(demodulated, x);
+        }
+
+        return demodulated;
+    }
+}

src/main/java/io/github/dsheirer/dsp/am/VectorAMDemodulator64.java

@@ -0,0 +1,83 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+package io.github.dsheirer.dsp.am;
+
+import io.github.dsheirer.dsp.magnitude.IMagnitudeCalculator;
+import io.github.dsheirer.dsp.magnitude.MagnitudeFactory;
+import io.github.dsheirer.vector.VectorUtilities;
+import jdk.incubator.vector.FloatVector;
+import jdk.incubator.vector.VectorSpecies;
+import org.apache.commons.math3.util.FastMath;
+
+/**
+ * Performs AM demodulation on baseband I/Q samples to produce demodulated float output.
+ */
+public class VectorAMDemodulator64 implements IAmDemodulator
+{
+    private static final VectorSpecies<Float> VECTOR_SPECIES = FloatVector.SPECIES_64;
+    private float mGain;
+    private IMagnitudeCalculator mMagnitudeCalculator = MagnitudeFactory.getMagnitudeCalculator();
+
+    /**
+     * Constructs this demodulator where the specified gain is applied to demodulated output samples.
+     *
+     * @param gain to apply to demodulated output samples.
+     */
+    public VectorAMDemodulator64(float gain)
+    {
+        mGain = gain;
+    }
+
+    /**
+     * Sets the gain to the specified level.
+     */
+    public void setGain(float gain)
+    {
+        mGain = gain;
+    }
+
+    /**
+     * Demodulates the comples I/Q sample and returns the demodulated output sample.
+     *
+     * @param inphase sample
+     * @param quadrature sample
+     * @return AM demodulated sample
+     */
+    public float demodulate(float inphase, float quadrature)
+    {
+        return (float) FastMath.sqrt((inphase * inphase) + (quadrature * quadrature)) * mGain;
+    }
+
+    @Override
+    public float[] demodulateMagnitude(float[] magnitude)
+    {
+        VectorUtilities.checkArrayLength(magnitude, VECTOR_SPECIES);
+        FloatVector gain = FloatVector.broadcast(VECTOR_SPECIES, mGain);
+        float[] demodulated = new float[magnitude.length];
+
+        FloatVector vector;
+        for(int x = 0; x < magnitude.length; x += VECTOR_SPECIES.length())
+        {
+            vector = FloatVector.fromArray(VECTOR_SPECIES, magnitude, x);
+            vector.sqrt().mul(gain).intoArray(demodulated, x);
+        }
+
+        return demodulated;
+    }
+}

src/main/java/io/github/dsheirer/dsp/filter/channelizer/AbstractComplexPolyphaseChannelizer.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -122,6 +122,11 @@ public abstract class AbstractComplexPolyphaseChannelizer implements Listener<In
             mChannels.add(polyphaseChannelSource);
             mSourceChangeBroadcaster.addListener(polyphaseChannelSource.getSourceEventListener());
         }
+        else
+        {
+            mLog.error("Error adding polyphase channel source - " + (polyphaseChannelSource == null ? "source is null" :
+                    "channel source is already added to this channelizer"));
+        }
     }
 
     /**
@@ -136,6 +141,11 @@ public abstract class AbstractComplexPolyphaseChannelizer implements Listener<In
             mChannels.remove(polyphaseChannelSource);
             mSourceChangeBroadcaster.removeListener(polyphaseChannelSource.getSourceEventListener());
         }
+        else
+        {
+            mLog.error("Error removing polyphase channel source - " + (polyphaseChannelSource == null ? "source is null" :
+                    "channel source was not previously added to this channelizer"));
+        }
     }
 
     /**

src/main/java/io/github/dsheirer/dsp/filter/channelizer/ComplexPolyphaseChannelizerM2.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -24,7 +24,6 @@ import io.github.dsheirer.sample.complex.InterleavedComplexSamples;
 import io.github.dsheirer.util.Dispatcher;
 import java.text.DecimalFormat;
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.List;
 import org.apache.commons.math3.util.FastMath;
 import org.jtransforms.fft.FloatFFT_1D;
@@ -69,8 +68,8 @@ public class ComplexPolyphaseChannelizerM2 extends AbstractComplexPolyphaseChann
      */
     private static final int PROCESSED_CHANNEL_RESULTS_THRESHOLD = 1024;
 
-    //Sized at 152 buffers a second where max = 5 seconds
-    private IFFTProcessorDispatcher mIFFTProcessorDispatcher = new IFFTProcessorDispatcher(5 * 152);
+    //Sized to process 40 times per second
+    private IFFTProcessorDispatcher mIFFTProcessorDispatcher = new IFFTProcessorDispatcher(25);
     private FloatFFT_1D mFFT;
     private float[] mInlineSamples;
     private float[] mInlineFilter;
@@ -407,25 +406,35 @@ public class ComplexPolyphaseChannelizerM2 extends AbstractComplexPolyphaseChann
      */
     public class IFFTProcessorDispatcher extends Dispatcher<List<float[]>>
     {
-        public IFFTProcessorDispatcher(int maximumSize)
+        public IFFTProcessorDispatcher(long interval)
         {
-            super(maximumSize, "sdrtrunk polyphase ifft processor", Collections.emptyList());
+            super("sdrtrunk polyphase ifft processor", interval);
 
             //We create a listener interface to receive the batched channel results arrays from the scheduled thread pool
             //dispatcher thread that is part of this continuous buffer processor.  We perform an IFFT on each
             //channel results array contained in each results buffer and then dispatch the buffer
             //so that it can be distributed to each channel listener.
             setListener(list -> {
-                List<float[]> processedChannelResults = new ArrayList<>();
-
-                for(float[] channelResults: list)
+                try
                 {
-                    //Rotate each of the channels to the correct phase using the IFFT
-                    mFFT.complexInverse(channelResults, true);
-                    processedChannelResults.add(channelResults);
-                }
+                    List<float[]> processedChannelResults = new ArrayList<>();
 
-                dispatch(processedChannelResults);
+                    for(float[] channelResults: list)
+                    {
+                        if(channelResults != null)
+                        {
+                            //Rotate each of the channels to the correct phase using the IFFT
+                            mFFT.complexInverse(channelResults, true);
+                            processedChannelResults.add(channelResults);
+                        }
+                    }
+
+                    dispatch(processedChannelResults);
+                }
+                catch(Throwable t)
+                {
+                    mLog.error("Error during IFFT and dispatch of processed channel results", t);
+                }
             });
         }
     }

src/main/java/io/github/dsheirer/dsp/filter/channelizer/PolyphaseChannelManager.java

@@ -20,15 +20,14 @@ package io.github.dsheirer.dsp.filter.channelizer;
 
 import io.github.dsheirer.buffer.INativeBuffer;
 import io.github.dsheirer.buffer.INativeBufferProvider;
-import io.github.dsheirer.buffer.NativeBufferPoisonPill;
 import io.github.dsheirer.controller.channel.event.ChannelStopProcessingRequest;
 import io.github.dsheirer.dsp.filter.design.FilterDesignException;
 import io.github.dsheirer.eventbus.MyEventBus;
+import io.github.dsheirer.log.LoggingSuppressor;
 import io.github.dsheirer.sample.Broadcaster;
 import io.github.dsheirer.sample.Listener;
 import io.github.dsheirer.sample.complex.InterleavedComplexSamples;
 import io.github.dsheirer.source.ISourceEventProcessor;
-import io.github.dsheirer.source.Source;
 import io.github.dsheirer.source.SourceEvent;
 import io.github.dsheirer.source.SourceException;
 import io.github.dsheirer.source.tuner.TunerController;
@@ -44,7 +43,6 @@ import java.util.Map;
 import java.util.SortedSet;
 import java.util.TreeSet;
 import java.util.concurrent.CopyOnWriteArrayList;
-import java.util.concurrent.locks.ReentrantLock;
 import org.apache.commons.math3.util.FastMath;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -68,6 +66,7 @@ import org.slf4j.LoggerFactory;
 public class PolyphaseChannelManager implements ISourceEventProcessor
 {
     private static final DecimalFormat FREQUENCY_FORMAT = new DecimalFormat("0.00000");
+    private static final LoggingSuppressor LOGGING_SUPPRESSOR = new LoggingSuppressor(LoggerFactory.getLogger(PolyphaseChannelManager.class));
     private final static Logger mLog = LoggerFactory.getLogger(PolyphaseChannelManager.class);
     private static final double MINIMUM_CHANNEL_BANDWIDTH = 25000.0;
     private static final double CHANNEL_OVERSAMPLING = 2.0;
@@ -111,8 +110,7 @@ public class PolyphaseChannelManager implements ISourceEventProcessor
         }
 
         mChannelCalculator = new ChannelCalculator(sampleRate, channelCount, frequency, CHANNEL_OVERSAMPLING);
-        mBufferDispatcher = new Dispatcher(500, "sdrtrunk polyphase buffer processor",
-                new NativeBufferPoisonPill());
+        mBufferDispatcher = new Dispatcher("sdrtrunk polyphase buffer processor", 10);
         mBufferDispatcher.setListener(mNativeBufferReceiver);
     }
 
@@ -178,14 +176,6 @@ public class PolyphaseChannelManager implements ISourceEventProcessor
         }
     }
 
-    /**
-     * Current channel sample rate which is (2 * channel bandwidth).
-     */
-    public double getChannelSampleRate()
-    {
-        return mChannelCalculator.getChannelSampleRate();
-    }
-
     /**
      * Current channel bandwidth/spacing.
      */
@@ -215,7 +205,8 @@ public class PolyphaseChannelManager implements ISourceEventProcessor
             }
             catch(IllegalArgumentException iae)
             {
-                mLog.debug("Couldn't design final output low pass filter for polyphase channel source");
+                LOGGING_SUPPRESSOR.error(iae.getMessage(), 3, "Couldn't allocate channel. " + iae.getMessage());
+                channelSource = null;
             }
         }
 
@@ -440,9 +431,10 @@ public class PolyphaseChannelManager implements ISourceEventProcessor
                     }
                     break;
                 case REQUEST_STOP_SAMPLE_STREAM:
-                    if(sourceEvent.hasSource() && sourceEvent.getSource() instanceof PolyphaseChannelSource)
+                    if(sourceEvent.hasSource() && sourceEvent.getSource() instanceof PolyphaseChannelSource channelSource)
                     {
-                        stopChannelSource((PolyphaseChannelSource)sourceEvent.getSource());
+                        stopChannelSource(channelSource);
+                        channelSource.dispose();
                     }
                     else
                     {
@@ -450,14 +442,6 @@ public class PolyphaseChannelManager implements ISourceEventProcessor
                             (sourceEvent.hasSource() ? sourceEvent.getSource().getClass() : "null source"));
                     }
                     break;
-                case REQUEST_SOURCE_DISPOSE:
-                    Source source = sourceEvent.getSource();
-
-                    if(source instanceof PolyphaseChannelSource)
-                    {
-                        source.dispose();
-                    }
-                    break;
                 case NOTIFICATION_MEASURED_FREQUENCY_ERROR_SYNC_LOCKED:
                     //Rebroadcast so that the tuner source can process this event
                     mSourceEventBroadcaster.broadcast(sourceEvent);
@@ -481,7 +465,6 @@ public class PolyphaseChannelManager implements ISourceEventProcessor
     public class NativeBufferReceiver implements Listener<INativeBuffer>
     {
         private boolean mOutputProcessorUpdateRequired = false;
-        private ReentrantLock mUpdateFlagLock = new ReentrantLock();
 
         /**
          * Processes tuner center frequency change source events to flag when output processors need updating.
@@ -493,18 +476,9 @@ public class PolyphaseChannelManager implements ISourceEventProcessor
 
             if(mChannelCalculator.getCenterFrequency() != frequency)
             {
-                mUpdateFlagLock.lock();
-
-                try
-                {
-                    //Update the channel calculator frequency so that it's ready when the output processor update occurs
-                    mChannelCalculator.setCenterFrequency(frequency);
-                    mOutputProcessorUpdateRequired = true;
-                }
-                finally
-                {
-                    mUpdateFlagLock.unlock();
-                }
+                //Update the channel calculator frequency so that it's ready when the output processor update occurs
+                mChannelCalculator.setCenterFrequency(frequency);
+                mOutputProcessorUpdateRequired = true;
             }
         }
 
@@ -516,19 +490,17 @@ public class PolyphaseChannelManager implements ISourceEventProcessor
         @Override
         public void receive(INativeBuffer nativeBuffer)
         {
-            mUpdateFlagLock.lock();
-
-            try
+            if(mOutputProcessorUpdateRequired)
             {
-                if(mOutputProcessorUpdateRequired)
+                try
                 {
                     updateOutputProcessors();
-                    mOutputProcessorUpdateRequired = false;
                 }
-            }
-            finally
-            {
-                mUpdateFlagLock.unlock();
+                catch(Exception e)
+                {
+                    mLog.error("Error updating polyphase channel output processors");
+                }
+                mOutputProcessorUpdateRequired = false;
             }
 
             if(mPolyphaseChannelizer != null)

src/main/java/io/github/dsheirer/dsp/filter/channelizer/PolyphaseChannelSource.java

@@ -25,12 +25,10 @@ import io.github.dsheirer.dsp.filter.design.FilterDesignException;
 import io.github.dsheirer.sample.Listener;
 import io.github.dsheirer.sample.complex.ComplexSamples;
 import io.github.dsheirer.source.SourceEvent;
-import io.github.dsheirer.source.tuner.channel.StreamProcessorWithHeartbeat;
 import io.github.dsheirer.source.tuner.channel.TunerChannel;
 import io.github.dsheirer.source.tuner.channel.TunerChannelSource;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.concurrent.locks.ReentrantLock;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -43,15 +41,13 @@ public class PolyphaseChannelSource extends TunerChannelSource implements Listen
 {
     private Logger mLog = LoggerFactory.getLogger(PolyphaseChannelSource.class);
     private IPolyphaseChannelOutputProcessor mPolyphaseChannelOutputProcessor;
-    private StreamProcessorWithHeartbeat<ComplexSamples> mStreamHeartbeatProcessor;
+    private Listener<ComplexSamples> mSamplesListener;
     private double mChannelSampleRate;
     private long mIndexCenterFrequency;
-    private ReentrantLock mOutputProcessorLock = new ReentrantLock();
-
     private List<Integer> mOutputProcessorIndexes = new ArrayList<>();
     private double mTunerSampleRate;
     private double mTunerCenterFrequency;
-
+    private PendingOutputProcessorUpdate mPendingOutputProcessorUpdate;
 
     /**
      * Constructs an instance
@@ -67,8 +63,7 @@ public class PolyphaseChannelSource extends TunerChannelSource implements Listen
     {
         super(producerSourceEventListener, tunerChannel);
         mChannelSampleRate = channelCalculator.getChannelSampleRate();
-        mStreamHeartbeatProcessor = new StreamProcessorWithHeartbeat<>(getHeartbeatManager(), HEARTBEAT_INTERVAL_MS);
-        updateOutputProcessor(channelCalculator, filterManager);
+        doUpdateOutputProcessor(channelCalculator, filterManager);
     }
 
     /**
@@ -111,8 +106,6 @@ public class PolyphaseChannelSource extends TunerChannelSource implements Listen
     {
         super.start();
 
-        mStreamHeartbeatProcessor.start();
-
         if(mPolyphaseChannelOutputProcessor != null)
         {
             mPolyphaseChannelOutputProcessor.start();
@@ -128,8 +121,6 @@ public class PolyphaseChannelSource extends TunerChannelSource implements Listen
         {
             mPolyphaseChannelOutputProcessor.stop();
         }
-
-        mStreamHeartbeatProcessor.stop();
     }
 
     /**
@@ -138,112 +129,129 @@ public class PolyphaseChannelSource extends TunerChannelSource implements Listen
     @Override
     public void setListener(final Listener<ComplexSamples> listener)
     {
-        mStreamHeartbeatProcessor.setListener(listener);
+        mSamplesListener = listener;
         mPolyphaseChannelOutputProcessor.setListener(this);
     }
 
     @Override
     public void receive(ComplexSamples complexSamples)
     {
-        mStreamHeartbeatProcessor.receive(complexSamples);
+        if(mSamplesListener != null)
+        {
+            try
+            {
+                mSamplesListener.receive(complexSamples);
+            }
+            catch(Throwable t)
+            {
+                mLog.error("Error dispatching complex samples to listener [" + mSamplesListener.getClass() + "]", t);
+            }
+        }
     }
 
     /**
-     * Updates the output processor whenever the source tuner's center frequency changes.
+     * Queues a request to update the output processor whenever the source tuner's center frequency changes.
      * @param channelCalculator providing access to updated tuner center frequency, sample rate, etc.
      * @param filterManager for designing and caching synthesis filters
      */
-    public void updateOutputProcessor(ChannelCalculator channelCalculator, SynthesisFilterManager filterManager) throws IllegalArgumentException
+    public void updateOutputProcessor(ChannelCalculator channelCalculator, SynthesisFilterManager filterManager)
+            throws IllegalArgumentException
+    {
+        mPendingOutputProcessorUpdate = new PendingOutputProcessorUpdate(channelCalculator, filterManager);
+    }
+
+    /**
+     * Performs the output processor update.  This method must be invoked on the channel results calling thread to
+     * ensure we don't have thread contention on the output processor.
+     * @param channelCalculator for updates
+     * @param filterManager for updates
+     * @throws IllegalArgumentException if there's an issue.
+     */
+    public void doUpdateOutputProcessor(ChannelCalculator channelCalculator, SynthesisFilterManager filterManager)
+            throws IllegalArgumentException
     {
         String errorMessage = null;
 
-        mOutputProcessorLock.lock();
+        //If a change in sample rate or center frequency makes this channel no longer viable, then the channel
+        //calculator will throw an IllegalArgException ... handled below
+        List<Integer> indexes = channelCalculator.getChannelIndexes(getTunerChannel());
 
-        try
+        mOutputProcessorIndexes.clear();
+        mOutputProcessorIndexes.addAll(indexes);
+        mTunerCenterFrequency = channelCalculator.getCenterFrequency();
+        mTunerSampleRate = channelCalculator.getSampleRate();
+
+        //The provided channels are necessarily aligned to the center frequency that this source is providing and an
+        //oscillator will mix the provided channels to bring the desired center frequency to baseband.
+        setFrequency(channelCalculator.getCenterFrequencyForIndexes(indexes));
+
+        if(mPolyphaseChannelOutputProcessor != null && mPolyphaseChannelOutputProcessor.getInputChannelCount() == indexes.size())
         {
-            //If a change in sample rate or center frequency makes this channel no longer viable, then the channel
-            //calculator will throw an IllegalArgException ... handled below
-            List<Integer> indexes = channelCalculator.getChannelIndexes(getTunerChannel());
+            mPolyphaseChannelOutputProcessor.setPolyphaseChannelIndices(indexes);
 
-            mOutputProcessorIndexes.clear();
-            mOutputProcessorIndexes.addAll(indexes);
-            mTunerCenterFrequency = channelCalculator.getCenterFrequency();
-            mTunerSampleRate = channelCalculator.getSampleRate();
-
-            //The provided channels are necessarily aligned to the center frequency that this source is providing and an
-            //oscillator will mix the provided channels to bring the desired center frequency to baseband.
-            setFrequency(channelCalculator.getCenterFrequencyForIndexes(indexes));
-
-            if(mPolyphaseChannelOutputProcessor != null && mPolyphaseChannelOutputProcessor.getInputChannelCount() == indexes.size())
+            if(indexes.size() > 1)
             {
-                mPolyphaseChannelOutputProcessor.setPolyphaseChannelIndices(indexes);
-
-                if(indexes.size() > 1)
+                try
                 {
+                    float[] filter = filterManager.getFilter(channelCalculator.getChannelSampleRate(),
+                            channelCalculator.getChannelBandwidth(), indexes.size());
+                    mPolyphaseChannelOutputProcessor.setSynthesisFilter(filter);
+                }
+                catch(FilterDesignException fde)
+                {
+                    mLog.error("Error creating an updated synthesis filter for the channel output processor");
+                    errorMessage ="Cannot update output processor - unable to design synthesis filter for [" +
+                        indexes.size() + "] channel indices - channel sample rate [" + channelCalculator.getChannelSampleRate() +
+                        "] channel bandwidth [" + channelCalculator.getChannelBandwidth() + "]";
+                }
+            }
+
+            mPolyphaseChannelOutputProcessor.setFrequencyOffset(getFrequencyOffset());
+        }
+        else //Create a new output processor.
+        {
+            if(mPolyphaseChannelOutputProcessor != null)
+            {
+                mPolyphaseChannelOutputProcessor.setListener(null);
+                mPolyphaseChannelOutputProcessor.stop();
+            }
+
+            mPolyphaseChannelOutputProcessor = null;
+
+            switch(indexes.size())
+            {
+                case 1:
+                    mPolyphaseChannelOutputProcessor = new OneChannelOutputProcessor(channelCalculator.getChannelSampleRate(),
+                            indexes, channelCalculator.getChannelCount(), getHeartbeatManager());
+                    mPolyphaseChannelOutputProcessor.setListener(this);
+                    mPolyphaseChannelOutputProcessor.setFrequencyOffset(getFrequencyOffset());
+                    mPolyphaseChannelOutputProcessor.start();
+                    break;
+                case 2:
                     try
                     {
                         float[] filter = filterManager.getFilter(channelCalculator.getChannelSampleRate(),
-                                channelCalculator.getChannelBandwidth(), indexes.size());
-                        mPolyphaseChannelOutputProcessor.setSynthesisFilter(filter);
-                    }
-                    catch(FilterDesignException fde)
-                    {
-                        mLog.error("Error creating an updated synthesis filter for the channel output processor");
-                        errorMessage ="Cannot update output processor - unable to design synthesis filter for [" +
-                                indexes.size() + "] channel indices";
-                    }
-                }
-
-                mPolyphaseChannelOutputProcessor.setFrequencyOffset(getFrequencyOffset());
-            }
-            else //Create a new output processor.
-            {
-                if(mPolyphaseChannelOutputProcessor != null)
-                {
-                    mPolyphaseChannelOutputProcessor.setListener(null);
-                }
-
-                mPolyphaseChannelOutputProcessor = null;
-
-                switch(indexes.size())
-                {
-                    case 1:
-                        mPolyphaseChannelOutputProcessor = new OneChannelOutputProcessor(channelCalculator.getChannelSampleRate(),
-                                indexes, channelCalculator.getChannelCount());
+                                channelCalculator.getChannelBandwidth(), 2);
+                        mPolyphaseChannelOutputProcessor = new TwoChannelOutputProcessor(channelCalculator.getChannelSampleRate(),
+                                indexes, filter, channelCalculator.getChannelCount(), getHeartbeatManager());
                         mPolyphaseChannelOutputProcessor.setListener(this);
                         mPolyphaseChannelOutputProcessor.setFrequencyOffset(getFrequencyOffset());
                         mPolyphaseChannelOutputProcessor.start();
-                        break;
-                    case 2:
-                        try
-                        {
-                            float[] filter = filterManager.getFilter(channelCalculator.getChannelSampleRate(),
-                                    channelCalculator.getChannelBandwidth(), 2);
-                            mPolyphaseChannelOutputProcessor = new TwoChannelOutputProcessor(channelCalculator.getChannelSampleRate(),
-                                    indexes, filter, channelCalculator.getChannelCount());
-                            mPolyphaseChannelOutputProcessor.setListener(this);
-                            mPolyphaseChannelOutputProcessor.setFrequencyOffset(getFrequencyOffset());
-                            mPolyphaseChannelOutputProcessor.start();
-                        }
-                        catch(FilterDesignException fde)
-                        {
-                            errorMessage = "Cannot create new output processor - unable to design synthesis filter for [" +
-                                    indexes.size() + "] channel indices";
-                            mLog.error("Error creating a synthesis filter for a new channel output processor");
-                        }
-                        break;
-                    default:
-                        mLog.error("Request to create an output processor for unexpected channel index size:" + indexes.size());
-                        mLog.info(channelCalculator.toString());
-                        errorMessage = "Unable to create new channel output processor - unexpected channel index size: " +
-                                indexes.size();
-                }
+                    }
+                    catch(FilterDesignException fde)
+                    {
+                        errorMessage = "Cannot create new output processor - unable to design synthesis filter for [" +
+                                indexes.size() + "] channel indices";
+                        mLog.error("Error creating a synthesis filter for a new channel output processor");
+                    }
+                    break;
+                default:
+                    mLog.error("Request to create an output processor for unexpected channel index size:" + indexes.size());
+                    mLog.info(channelCalculator.toString());
+                    errorMessage = "Unable to create new channel output processor - unexpected channel index size: " +
+                            indexes.size();
             }
         }
-        finally
-        {
-            mOutputProcessorLock.unlock();
-        }
 
         //Unlikely, but if we had an error designing a synthesis filter, throw an exception
         if(errorMessage != null)
@@ -262,7 +270,13 @@ public class PolyphaseChannelSource extends TunerChannelSource implements Listen
      */
     public void receiveChannelResults(List<float[]> channelResultsList, long currentSamplesTimestamp)
     {
-        mOutputProcessorLock.lock();
+        if(mPendingOutputProcessorUpdate != null)
+        {
+            ChannelCalculator channelCalculator = mPendingOutputProcessorUpdate.getChannelCalculator();
+            SynthesisFilterManager filterManager = mPendingOutputProcessorUpdate.getSynthesisFilterManager();
+            mPendingOutputProcessorUpdate = null;
+            doUpdateOutputProcessor(channelCalculator, filterManager);
+        }
 
         try
         {
@@ -271,9 +285,9 @@ public class PolyphaseChannelSource extends TunerChannelSource implements Listen
                 mPolyphaseChannelOutputProcessor.receiveChannelResults(channelResultsList, currentSamplesTimestamp);
             }
         }
-        finally
+        catch(Exception e)
         {
-            mOutputProcessorLock.unlock();
+            mLog.error("Error processing channel results", e);
         }
     }
 
@@ -342,4 +356,40 @@ public class PolyphaseChannelSource extends TunerChannelSource implements Listen
         return "POLYPHASE [" + mPolyphaseChannelOutputProcessor.getInputChannelCount() + "] " +
             getTunerChannel().getFrequency();
     }
+
+    /**
+     * Support classes needed to update the output processor.
+     */
+    public class PendingOutputProcessorUpdate
+    {
+        private final ChannelCalculator mChannelCalculator;
+        private final SynthesisFilterManager mSynthesisFilterManager;
+
+        /**
+         * Constructs an instance
+         * @param channelCalculator for support
+         * @param synthesisFilterManager for support
+         */
+        public PendingOutputProcessorUpdate(ChannelCalculator channelCalculator, SynthesisFilterManager synthesisFilterManager)
+        {
+            mChannelCalculator = channelCalculator;
+            mSynthesisFilterManager = synthesisFilterManager;
+        }
+
+        /**
+         * Channel calculator
+         */
+        public ChannelCalculator getChannelCalculator()
+        {
+            return mChannelCalculator;
+        }
+
+        /**
+         * Channel calculator
+         */
+        public SynthesisFilterManager getSynthesisFilterManager()
+        {
+            return mSynthesisFilterManager;
+        }
+    }
 }

src/main/java/io/github/dsheirer/dsp/filter/channelizer/output/ChannelOutputProcessor.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -20,8 +20,8 @@ package io.github.dsheirer.dsp.filter.channelizer.output;
 
 import io.github.dsheirer.sample.Listener;
 import io.github.dsheirer.sample.complex.ComplexSamples;
+import io.github.dsheirer.source.heartbeat.HeartbeatManager;
 import io.github.dsheirer.util.Dispatcher;
-import java.util.Collections;
 import java.util.List;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -31,6 +31,7 @@ public abstract class ChannelOutputProcessor implements IPolyphaseChannelOutputP
     private final static Logger mLog = LoggerFactory.getLogger(ChannelOutputProcessor.class);
 
     private Dispatcher<List<float[]>> mChannelResultsDispatcher;
+    private HeartbeatManager mHeartbeatManager;
     protected Listener<ComplexSamples> mComplexSamplesListener;
     private int mInputChannelCount;
     private long mCurrentSampleTimestamp = System.currentTimeMillis();
@@ -42,12 +43,24 @@ public abstract class ChannelOutputProcessor implements IPolyphaseChannelOutputP
      * @param inputChannelCount is the number of input channels for this output processor
      * @param sampleRate of the output channel.  This is used to match the oscillator's sample rate to the output
      * channel sample rate for frequency translation/correction.
+     * @param heartbeatManager to receive pings on the dispatcher thread
      */
-    public ChannelOutputProcessor(int inputChannelCount, double sampleRate)
+    public ChannelOutputProcessor(int inputChannelCount, double sampleRate, HeartbeatManager heartbeatManager)
     {
         mInputChannelCount = inputChannelCount;
-        mChannelResultsDispatcher = new Dispatcher<>((int)sampleRate, "sdrtrunk polyphase channel", Collections.emptyList());
-        mChannelResultsDispatcher.setListener(floats -> process(floats));
+        //Process 1/10th of the sample rate per second at a rate of 20 times a second (200% of anticipated rate)
+        mHeartbeatManager = heartbeatManager;
+        mChannelResultsDispatcher = new Dispatcher("sdrtrunk polyphase channel",50, mHeartbeatManager);
+        mChannelResultsDispatcher.setListener(floats -> {
+            try
+            {
+                process(floats);
+            }
+            catch(Throwable t)
+            {
+                mLog.error("Error processing channel results", t);
+            }
+        });
     }
 
     /**

src/main/java/io/github/dsheirer/dsp/filter/channelizer/output/OneChannelOutputProcessor.java

@@ -19,6 +19,7 @@
 package io.github.dsheirer.dsp.filter.channelizer.output;
 
 import io.github.dsheirer.sample.complex.ComplexSamples;
+import io.github.dsheirer.source.heartbeat.HeartbeatManager;
 import java.util.List;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -36,10 +37,12 @@ public class OneChannelOutputProcessor extends ChannelOutputProcessor
      * @param sampleRate of the output sample stream.
      * @param channelIndexes containing a single channel index.
      * @param gain value to apply.  This is typically the same as the channelizer's channel count.
+     * @param heartbeatManager to receive heartbeats on the dispatch thread
      */
-    public OneChannelOutputProcessor(double sampleRate, List<Integer> channelIndexes, float gain)
+    public OneChannelOutputProcessor(double sampleRate, List<Integer> channelIndexes, float gain,
+                                     HeartbeatManager heartbeatManager)
     {
-        super(1, sampleRate);
+        super(1, sampleRate, heartbeatManager);
         setPolyphaseChannelIndices(channelIndexes);
         mMixerAssembler = new OneChannelMixerAssembler(gain);
         mMixerAssembler.getMixer().setSampleRate(sampleRate);

src/main/java/io/github/dsheirer/dsp/filter/channelizer/output/TwoChannelOutputProcessor.java

@@ -19,6 +19,7 @@
 package io.github.dsheirer.dsp.filter.channelizer.output;
 
 import io.github.dsheirer.sample.complex.ComplexSamples;
+import io.github.dsheirer.source.heartbeat.HeartbeatManager;
 import java.util.List;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -37,12 +38,14 @@ public class TwoChannelOutputProcessor extends ChannelOutputProcessor
      * @param sampleRate of the output sample stream.
      * @param channelIndexes containing two channel indices.
      * @param gain to apply to output.  Typically this is equal to the channelizer's channel count.
+     * @param heartbeatManager to be pinged on the dispatcher thread
      */
-    public TwoChannelOutputProcessor(double sampleRate, List<Integer> channelIndexes, float[] filter, float gain)
+    public TwoChannelOutputProcessor(double sampleRate, List<Integer> channelIndexes, float[] filter, float gain,
+                                     HeartbeatManager heartbeatManager)
     {
         //Set the frequency correction oscillator to 2 x output sample rate since we'll be correcting the frequency
         //after synthesizing both input channels
-        super(2, sampleRate);
+        super(2, sampleRate, heartbeatManager);
         setPolyphaseChannelIndices(channelIndexes);
         mMixerAssembler = new TwoChannelMixerAssembler(gain);
         mMixerAssembler.getMixer().setSampleRate(sampleRate);

src/main/java/io/github/dsheirer/dsp/filter/iir/SinglePoleIirFilter.java

@@ -1,3 +1,22 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
 package io.github.dsheirer.dsp.filter.iir;
 
 /**
@@ -40,7 +59,7 @@ public class SinglePoleIirFilter
      * @param sample to process/filter
      * @return filtered output
      */
-    public double filter(float sample)
+    public float filter(float sample)
     {
         mOutput = (mOutput * mOneMinusAlpha) + (mAlpha * sample);
         return mOutput;
@@ -49,7 +68,7 @@ public class SinglePoleIirFilter
     /**
      * Current output value
      */
-    public double getValue()
+    public float getValue()
     {
         return mOutput;
     }

src/main/java/io/github/dsheirer/dsp/fm/FmDemodulatorFactory.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -37,40 +37,23 @@ public class FmDemodulatorFactory
      * implementation from scalar and vector options.
      * @return demodulator instance
      */
-    public static IFmDemodulator getFmDemodulator()
+    public static IDemodulator getFmDemodulator()
     {
         Implementation implementation = CalibrationManager.getInstance().getImplementation(CalibrationType.FM_DEMODULATOR);
 
         switch(implementation)
         {
-            case VECTOR_SIMD_PREFERRED:
-                return new VectorFMDemodulator();
+            case VECTOR_SIMD_64:
+                return new VectorFMDemodulator64();
+            case VECTOR_SIMD_128:
+                return new VectorFMDemodulator128();
+            case VECTOR_SIMD_256:
+                return new VectorFMDemodulator256();
+            case VECTOR_SIMD_512:
+                return new VectorFMDemodulator512();
             case SCALAR:
-                return new ScalarFMDemodulator();
             default:
-                mLog.warn("Unrecognized optimal operation for FM demodulator: " + implementation.name());
                 return new ScalarFMDemodulator();
         }
     }
-
-    /**
-     * Creates the optimal Squelching FM demodulator using calibration data to select the optimal
-     * implementation from scalar and vector options.
-     * @return demodulator instance
-     */
-    public static ISquelchingFmDemodulator getSquelchingFmDemodulator(float alpha, float threshold, int ramp)
-    {
-        Implementation implementation = CalibrationManager.getInstance().getImplementation(CalibrationType.FM_DEMODULATOR);
-
-        switch(implementation)
-        {
-            case VECTOR_SIMD_PREFERRED:
-                return new VectorSquelchingFMDemodulator(alpha, threshold, ramp);
-            case SCALAR:
-                return new ScalarSquelchingFMDemodulator(alpha, threshold, ramp);
-            default:
-                mLog.warn("Unrecognized optimal operation for Squelching FM demodulator: " + implementation.name());
-                return new ScalarSquelchingFMDemodulator(alpha, threshold, ramp);
-        }
-    }
 }

src/main/java/io/github/dsheirer/dsp/fm/IDemodulator.java

@@ -0,0 +1,34 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.dsp.fm;
+
+/**
+ * Interface for demodulator of complex sample arrays.
+ */
+public interface IDemodulator
+{
+    /**
+     * Demodulate the complex sample array and return an array of real audio samples.
+     * @param i samples to demodulate
+     * @param q samples to demodulate
+     * @return demodulated samples.
+     */
+    float[] demodulate(float[] i, float[] q);
+}

src/main/java/io/github/dsheirer/dsp/fm/IFmDemodulator.java

@@ -1,14 +0,0 @@
-package io.github.dsheirer.dsp.fm;
-
-/**
- * Interface for FM demodulator
- */
-public interface IFmDemodulator
-{
-    /**
-     * Demodulate the complex sample array and return an array of real audio samples.
-     * @param samples to demodulate
-     * @return demodulated samples.
-     */
-    float[] demodulate(float[] i, float[] q);
-}

src/main/java/io/github/dsheirer/dsp/fm/ISquelchingDemodulator.java

@@ -0,0 +1,69 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.dsp.fm;
+
+import io.github.dsheirer.sample.Listener;
+import io.github.dsheirer.source.SourceEvent;
+
+/**
+ * Interface for FM demodulator that provides squelch control.
+ */
+public interface ISquelchingDemodulator extends IDemodulator
+{
+    /**
+     * Sets the sample rate so that the squelch can adjust the channel power level broadcast notification rate
+     * @param sampleRate in hertz
+     */
+    void setSampleRate(int sampleRate);
+
+    /**
+     * Indicates if the squelch state has changed.
+     */
+    boolean isSquelchChanged();
+
+    /**
+     * Indicates if the squelch state is currently muted
+     */
+    boolean isMuted();
+
+    /**
+     * Sets the threshold to use for power squelch
+     * @param threshold in decibels
+     */
+    void setSquelchThreshold(float threshold);
+
+    /**
+     * Enables or disables the squelch auto-tracking feature where the squelch threshold is auto-adjusted based on the
+     * observed channel power when the signal is not present (ie squelch state).
+     * @param autoTrack true to enable
+     */
+    void setSquelchAutoTrack(boolean autoTrack);
+
+    /**
+     * Registers the listener to receive notifications of squelch change events from the power squelch.
+     */
+    void setSourceEventListener(Listener<SourceEvent> listener);
+
+    /**
+     * Receives a source event
+     */
+    void receive(SourceEvent sourceEvent);
+}
+

src/main/java/io/github/dsheirer/dsp/fm/ISquelchingFmDemodulator.java

@@ -1,42 +0,0 @@
-package io.github.dsheirer.dsp.fm;
-
-import io.github.dsheirer.sample.Listener;
-import io.github.dsheirer.source.SourceEvent;
-
-/**
- * Interface for FM demodulator that provides squelch control.
- */
-public interface ISquelchingFmDemodulator extends IFmDemodulator
-{
-    /**
-     * Indicates if the squelch state has changed.
-     */
-    boolean isSquelchChanged();
-
-    /**
-     * Indicates if the squelch state is currently muted
-     */
-    boolean isMuted();
-
-    /**
-     * Sets the threshold to use for power squelch
-     * @param threshold in decibels
-     */
-    void setSquelchThreshold(double threshold);
-
-    /**
-     * Resets the demodulator
-     */
-    void reset();
-
-    /**
-     * Registers the listener to receive notifications of squelch change events from the power squelch.
-     */
-    void setSourceEventListener(Listener<SourceEvent> listener);
-
-    /**
-     * Receives a source event
-     */
-    void receive(SourceEvent sourceEvent);
-}
-

src/main/java/io/github/dsheirer/dsp/fm/ScalarFMDemodulator.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -18,16 +18,15 @@
  */
 package io.github.dsheirer.dsp.fm;
 
-import io.github.dsheirer.sample.complex.Complex;
 import org.apache.commons.math3.util.FastMath;
 
 /**
  * FM Demodulator for demodulating complex samples and producing demodulated floating point samples.
  */
-public class ScalarFMDemodulator implements IFmDemodulator
+public class ScalarFMDemodulator implements IDemodulator
 {
-    private float mPreviousI = 0.0f;
-    private float mPreviousQ = 0.0f;
+    protected float mPreviousI = 0.0f;
+    protected float mPreviousQ = 0.0f;
     protected float mGain;
 
     /**
@@ -47,50 +46,6 @@ public class ScalarFMDemodulator implements IFmDemodulator
         mGain = gain;
     }
 
-    /**
-     * Demodulates the I/Q sample via complex sample multiplication by the complex conjugates of the most recently
-     * demodulated complex sample (ie previous sample).  Each new sample overwrites the previously stored sample to
-     * allow future invocations of the method to simply use a new sample value.
-     *
-     * @param currentI of the sample
-     * @param currentQ of the sample
-     * @return demodulated sample
-     */
-    public float demodulate(float currentI, float currentQ)
-    {
-        /**
-         * Multiply the current sample against the complex conjugate of the
-         * previous sample to derive the phase delta between the two samples
-         *
-         * Negating the previous sample quadrature produces the conjugate
-         */
-        double inphase = (currentI * mPreviousI) - (currentQ * -mPreviousQ);
-        double quadrature = (currentQ * mPreviousI) + (currentI * -mPreviousQ);
-
-        double angle = 0.0f;
-
-        //Check for divide by zero
-        if(inphase != 0)
-        {
-            /**
-             * Use the arc-tangent of quadrature divided by inphase to
-             * get the phase angle (+/-) which was directly manipulated by the
-             * original message waveform during the modulation.  This value now
-             * serves as the instantaneous amplitude of the demodulated signal
-             */
-            double denominator = 1.0d / inphase;
-            angle = FastMath.atan((double)quadrature * denominator);
-        }
-
-        /**
-         * Store the current sample to use during the next iteration
-         */
-        mPreviousI = currentI;
-        mPreviousQ = currentQ;
-
-        return (float)(angle * mGain);
-    }
-
     public float[] demodulate(float[] i, float[] q)
     {
         float[] demodulated = new float[i.length];
@@ -135,35 +90,6 @@ public class ScalarFMDemodulator implements IFmDemodulator
         return demodulated;
     }
 
-    /**
-     * Demodulates the complex samples and returns the demodulated value.
-     * @param previous
-     * @param current
-     * @return
-     */
-    public static double demodulate(Complex previous, Complex current)
-    {
-        double inphase = (current.inphase() * previous.inphase()) - (current.quadrature() * -previous.quadrature());
-        double quadrature = (current.quadrature() * previous.inphase()) + (current.inphase() * -previous.quadrature());
-
-        double angle = 0.0f;
-
-        //Check for divide by zero
-        if(inphase != 0)
-        {
-            /**
-             * Use the arc-tangent of quadrature divided by inphase to
-             * get the phase angle (+/-) which was directly manipulated by the
-             * original message waveform during the modulation.  This value now
-             * serves as the instantaneous amplitude of the demodulated signal
-             */
-            double denominator = 1.0d / inphase;
-            angle = FastMath.atan((double)quadrature * denominator);
-        }
-
-        return angle;
-    }
-
     public void dispose()
     {
         //no-op

src/main/java/io/github/dsheirer/dsp/fm/ScalarSquelchingFMDemodulator.java

@@ -1,98 +0,0 @@
-/*
- * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>
- * ****************************************************************************
- */
-package io.github.dsheirer.dsp.fm;
-
-import io.github.dsheirer.dsp.squelch.PowerSquelch;
-import io.github.dsheirer.sample.Listener;
-import io.github.dsheirer.source.SourceEvent;
-
-/**
- * FM Demodulator for demodulating complex samples and producing demodulated floating point samples.
- *
- * Implements listener of source events to process runtime squelch threshold change request events
- * which are forwarded to the power squelch control.
- */
-public class ScalarSquelchingFMDemodulator extends ScalarFMDemodulator implements ISquelchingFmDemodulator, Listener<SourceEvent>
-{
-    private PowerSquelch mPowerSquelch;
-    private boolean mSquelchChanged = false;
-
-    /**
-     * Creates an FM demodulator instance with a default gain of 1.0.
-     */
-    public ScalarSquelchingFMDemodulator(float alpha, float threshold, int ramp)
-    {
-        mPowerSquelch = new PowerSquelch(alpha, threshold, ramp);
-    }
-
-    /**
-     * Registers the listener to receive notifications of squelch change events from the power squelch.
-     */
-    public void setSourceEventListener(Listener<SourceEvent> listener)
-    {
-        mPowerSquelch.setSourceEventListener(listener);
-    }
-
-    /**
-     * Sets the threshold for squelch control
-     * @param threshold (dB)
-     */
-    public void setSquelchThreshold(double threshold)
-    {
-        mPowerSquelch.setSquelchThreshold(threshold);
-    }
-
-    /**
-     * Indicates if the squelch state has changed during the processing of buffer(s)
-     */
-    public boolean isSquelchChanged()
-    {
-        return mSquelchChanged;
-    }
-
-    /**
-     * Sets or resets the squelch changed flag.
-     */
-    private void setSquelchChanged(boolean changed)
-    {
-        mSquelchChanged = changed;
-    }
-
-    /**
-     * Indicates if the squelch state is currently muted
-     */
-    public boolean isMuted()
-    {
-        return mPowerSquelch.isMuted();
-    }
-
-    @Override
-    public void receive(SourceEvent sourceEvent)
-    {
-        //Only forward squelch threshold change request events
-        if(sourceEvent.getEvent() == SourceEvent.Event.REQUEST_CHANGE_SQUELCH_THRESHOLD)
-        {
-            mPowerSquelch.receive(sourceEvent);
-        }
-        else if(sourceEvent.getEvent() == SourceEvent.Event.REQUEST_CURRENT_SQUELCH_THRESHOLD)
-        {
-            mPowerSquelch.receive(sourceEvent);
-        }
-    }
-}

src/main/java/io/github/dsheirer/dsp/fm/SquelchingFMDemodulator.java

@@ -0,0 +1,161 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.dsp.fm;
+
+import io.github.dsheirer.dsp.magnitude.IMagnitudeCalculator;
+import io.github.dsheirer.dsp.magnitude.MagnitudeFactory;
+import io.github.dsheirer.dsp.squelch.AdaptiveSquelch;
+import io.github.dsheirer.sample.Listener;
+import io.github.dsheirer.source.SourceEvent;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * FM Demodulator for demodulating complex samples and producing demodulated floating point samples.
+ *
+ * Implements listener of source events to process runtime squelch threshold change request events
+ * which are forwarded to the power squelch control.
+ */
+public class SquelchingFMDemodulator implements ISquelchingDemodulator, Listener<SourceEvent>
+{
+    private static final Logger mLog = LoggerFactory.getLogger(SquelchingFMDemodulator.class);
+    private static final float ZERO = 0.0f;
+    private final AdaptiveSquelch mAdaptiveSquelch;
+    private final IMagnitudeCalculator mMagnitude = MagnitudeFactory.getMagnitudeCalculator();
+    private final IDemodulator mFmDemodulator = FmDemodulatorFactory.getFmDemodulator();
+    private boolean mSquelchChanged = false;
+
+    /**
+     * Creates an FM demodulator instance with a default gain of 1.0.
+     *
+     * @param alpha decay value of the single pole IIR filter in range: 0.0 - 1.0.  The smaller the alpha value,
+     * the slower the squelch response.
+     * @param squelchThreshold in decibels.  Signal power must exceed this threshold value for unsquelch.
+     * causes immediate mute and unmute.  Set to higher count to prevent mute/unmute flapping.
+     * @param squelchAutoTrack to enable the squelch noise floor auto-tracking feature.
+     */
+    public SquelchingFMDemodulator(float alpha, float squelchThreshold, boolean squelchAutoTrack)
+    {
+        mAdaptiveSquelch = new AdaptiveSquelch(alpha, squelchThreshold, squelchAutoTrack);
+    }
+
+    /**
+     * Set or update the sample rate for the squelch to adjust the power level notification rate.
+     * @param sampleRate in hertz
+     */
+    public void setSampleRate(int sampleRate)
+    {
+        mAdaptiveSquelch.setSampleRate(sampleRate);
+    }
+
+    /**
+     * Registers the listener to receive notifications of squelch change events from the power squelch.
+     */
+    public void setSourceEventListener(Listener<SourceEvent> listener)
+    {
+        mAdaptiveSquelch.setSourceEventListener(listener);
+    }
+
+    /**
+     * Demodulates the complex (I/Q) sample arrays
+     * @param i inphase samples
+     * @param q quadrature samples
+     * @return demodulated real samples
+     */
+    @Override
+    public float[] demodulate(float[] i, float[] q)
+    {
+        setSquelchChanged(false);
+
+        float[] demodulated = mFmDemodulator.demodulate(i, q);
+        float[] magnitude = mMagnitude.calculate(i, q);
+
+        for(int x = 0; x < magnitude.length; x++)
+        {
+            mAdaptiveSquelch.process(magnitude[x]);
+
+            if(!(mAdaptiveSquelch.isUnmuted()))
+            {
+                demodulated[x] = ZERO;
+            }
+
+            if(mAdaptiveSquelch.isSquelchChanged())
+            {
+                setSquelchChanged(true);
+            }
+        }
+
+        return demodulated;
+    }
+
+    /**
+     * Sets the threshold for squelch control
+     * @param threshold (dB)
+     */
+    public void setSquelchThreshold(float threshold)
+    {
+        mAdaptiveSquelch.setSquelchThreshold(threshold);
+    }
+
+    @Override
+    public void setSquelchAutoTrack(boolean autoTrack)
+    {
+        mAdaptiveSquelch.setSquelchAutoTrack(autoTrack);
+    }
+
+    /**
+     * Indicates if the squelch state has changed during the processing of buffer(s)
+     */
+    public boolean isSquelchChanged()
+    {
+        return mSquelchChanged;
+    }
+
+    /**
+     * Sets or resets the squelch changed flag.
+     */
+    private void setSquelchChanged(boolean changed)
+    {
+        mSquelchChanged = changed;
+    }
+
+    /**
+     * Indicates if the squelch state is currently muted
+     */
+    public boolean isMuted()
+    {
+        return mAdaptiveSquelch.isMuted();
+    }
+
+    @Override
+    public void receive(SourceEvent sourceEvent)
+    {
+        switch(sourceEvent.getEvent())
+        {
+            //Only forward squelch threshold and auto-track current & change requests
+            case REQUEST_CURRENT_SQUELCH_THRESHOLD:
+            case REQUEST_CHANGE_SQUELCH_THRESHOLD:
+            case REQUEST_CURRENT_SQUELCH_AUTO_TRACK:
+            case REQUEST_CHANGE_SQUELCH_AUTO_TRACK:
+                mAdaptiveSquelch.receive(sourceEvent);
+                break;
+        }
+    }
+}

src/main/java/io/github/dsheirer/dsp/fm/VectorFMDemodulator.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -26,17 +26,12 @@ import jdk.incubator.vector.VectorSpecies;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.text.DecimalFormat;
-import java.util.Arrays;
-import java.util.Random;
-
 /**
  * FM demodulator that uses JDK 17+ SIMD vector intrinsics
  */
-public class VectorFMDemodulator implements IFmDemodulator
+public abstract class VectorFMDemodulator implements IDemodulator
 {
     private static final Logger mLog = LoggerFactory.getLogger(VectorFMDemodulator.class);
-    protected static final VectorSpecies<Float> VECTOR_SPECIES = FloatVector.SPECIES_PREFERRED;
     protected static final float ZERO = 0.0f;
     private static final int BUFFER_OVERLAP = 1;
 
@@ -48,9 +43,16 @@ public class VectorFMDemodulator implements IFmDemodulator
     {
     }
 
+    /**
+     * Vector species as specified by the implementing sub-class.
+     */
+    protected abstract VectorSpecies<Float> getVectorSpecies();
+
     @Override public float[] demodulate(float[] i, float[] q)
     {
-        VectorUtilities.checkComplexArrayLength(i, q, VECTOR_SPECIES);
+//        VectorSpecies<Float> species= getVectorSpecies();
+
+        VectorUtilities.checkComplexArrayLength(i, q, getVectorSpecies());
 
         if(mIBuffer.length != (i.length + BUFFER_OVERLAP))
         {
@@ -70,12 +72,12 @@ public class VectorFMDemodulator implements IFmDemodulator
 
         FloatVector currentI, currentQ, previousI, previousQ, demod, demodI, demodQ;
 
-        for(int bufferPointer = 0; bufferPointer < mIBuffer.length - 1; bufferPointer += VECTOR_SPECIES.length())
+        for(int bufferPointer = 0; bufferPointer < mIBuffer.length - 1; bufferPointer += getVectorSpecies().length())
         {
-            previousI = FloatVector.fromArray(VECTOR_SPECIES, mIBuffer, bufferPointer);
-            previousQ = FloatVector.fromArray(VECTOR_SPECIES, mQBuffer, bufferPointer);
-            currentI = FloatVector.fromArray(VECTOR_SPECIES, mIBuffer, bufferPointer + 1);
-            currentQ = FloatVector.fromArray(VECTOR_SPECIES, mQBuffer, bufferPointer + 1);
+            previousI = FloatVector.fromArray(getVectorSpecies(), mIBuffer, bufferPointer);
+            previousQ = FloatVector.fromArray(getVectorSpecies(), mQBuffer, bufferPointer);
+            currentI = FloatVector.fromArray(getVectorSpecies(), mIBuffer, bufferPointer + 1);
+            currentQ = FloatVector.fromArray(getVectorSpecies(), mQBuffer, bufferPointer + 1);
 
             demodI = currentI.mul(previousI).sub(currentQ.mul(previousQ.neg()));
             demodQ = currentQ.mul(previousI).add(currentI.mul(previousQ.neg()));
@@ -89,53 +91,4 @@ public class VectorFMDemodulator implements IFmDemodulator
 
         return demodulated;
     }
-
-    public static void main(String[] args)
-    {
-        int iterations = 3_000_000;
-        int sampleSize = 2048;
-
-        Random random = new Random();
-
-        float[] iSamples = new float[sampleSize];
-        float[] qSamples = new float[sampleSize];
-        for(int x = 0; x < iSamples.length; x++)
-        {
-            iSamples[x] = random.nextFloat() * 2.0f - 1.0f;
-            qSamples[x] = random.nextFloat() * 2.0f - 1.0f;
-        }
-
-        boolean validation = false;
-
-        ScalarFMDemodulator legacy = new ScalarFMDemodulator();
-        VectorFMDemodulator vector = new VectorFMDemodulator();
-
-        if(validation)
-        {
-            float[] legacySamples = legacy.demodulate(iSamples, qSamples);
-            float[] vectorSamples = vector.demodulate(iSamples, qSamples);
-            System.out.println("LEGACY:" + Arrays.toString(legacySamples));
-            System.out.println("VECTOR:" + Arrays.toString(vectorSamples));
-        }
-        else
-        {
-            System.out.println("Test Starting ...");
-            long start = System.currentTimeMillis();
-
-            double accumulator = 0.0;
-
-            for(int i = 0; i < iterations; i++)
-            {
-                float[] samples = legacy.demodulate(iSamples, qSamples);
-//                float[] samples = vector.demodulate(iSamples, qSamples);
-                accumulator += samples[3];
-            }
-
-            double elapsed = System.currentTimeMillis() - start;
-
-            DecimalFormat df = new DecimalFormat("0.000");
-            System.out.println("Accumulator: " + accumulator);
-            System.out.println("Test Complete.  Elapsed Time: " + df.format(elapsed / 1000.0d) + " seconds");
-        }
-    }
 }

src/main/java/io/github/dsheirer/dsp/fm/VectorFMDemodulator128.java

@@ -0,0 +1,88 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.dsp.fm;
+
+import io.github.dsheirer.vector.VectorUtilities;
+import jdk.incubator.vector.FloatVector;
+import jdk.incubator.vector.VectorOperators;
+import jdk.incubator.vector.VectorSpecies;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * FM demodulator that uses JDK 17+ SIMD vector intrinsics
+ */
+public class VectorFMDemodulator128 implements IDemodulator
+{
+    private static final Logger mLog = LoggerFactory.getLogger(VectorFMDemodulator128.class);
+    protected static final float ZERO = 0.0f;
+    private static final int BUFFER_OVERLAP = 1;
+    private static final VectorSpecies<Float> VECTOR_SPECIES = FloatVector.SPECIES_128;
+
+    //Initialize buffers to be non-null and resize once the first buffer arrives
+    private float[] mIBuffer = new float[1];
+    private float[] mQBuffer = new float[1];
+
+    public VectorFMDemodulator128()
+    {
+    }
+
+    @Override public float[] demodulate(float[] i, float[] q)
+    {
+        VectorUtilities.checkComplexArrayLength(i, q, VECTOR_SPECIES);
+
+        if(mIBuffer.length != (i.length + BUFFER_OVERLAP))
+        {
+            mIBuffer = new float[i.length + BUFFER_OVERLAP];
+            mQBuffer = new float[q.length + BUFFER_OVERLAP];
+        }
+
+        //Copy last sample to beginning of buffer arrays
+        mIBuffer[0] = mIBuffer[mIBuffer.length - 1];
+        mQBuffer[0] = mQBuffer[mQBuffer.length - 1];
+
+        //Copy new samples to end of buffer arrays
+        System.arraycopy(i, 0, mIBuffer, 1, i.length);
+        System.arraycopy(q, 0, mQBuffer, 1, q.length);
+
+        float[] demodulated = new float[i.length];
+
+        FloatVector currentI, currentQ, previousI, previousQ, demod, demodI, demodQ;
+
+        for(int bufferPointer = 0; bufferPointer < mIBuffer.length - 1; bufferPointer += VECTOR_SPECIES.length())
+        {
+            previousI = FloatVector.fromArray(VECTOR_SPECIES, mIBuffer, bufferPointer);
+            previousQ = FloatVector.fromArray(VECTOR_SPECIES, mQBuffer, bufferPointer);
+            currentI = FloatVector.fromArray(VECTOR_SPECIES, mIBuffer, bufferPointer + 1);
+            currentQ = FloatVector.fromArray(VECTOR_SPECIES, mQBuffer, bufferPointer + 1);
+
+            demodI = currentI.mul(previousI).sub(currentQ.mul(previousQ.neg()));
+            demodQ = currentQ.mul(previousI).add(currentI.mul(previousQ.neg()));
+
+            //Replace any zero-values in the I vector by adding Float.MIN_VALUE to side-step divide by zero errors
+            demodI = demodI.add(Float.MIN_VALUE, demodQ.eq(ZERO));
+
+            demod = demodQ.div(demodI).lanewise(VectorOperators.ATAN);
+            demod.intoArray(demodulated, bufferPointer);
+        }
+
+        return demodulated;
+    }
+}

src/main/java/io/github/dsheirer/dsp/fm/VectorFMDemodulator256.java

@@ -0,0 +1,88 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.dsp.fm;
+
+import io.github.dsheirer.vector.VectorUtilities;
+import jdk.incubator.vector.FloatVector;
+import jdk.incubator.vector.VectorOperators;
+import jdk.incubator.vector.VectorSpecies;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * FM demodulator that uses JDK 17+ SIMD vector intrinsics
+ */
+public class VectorFMDemodulator256 implements IDemodulator
+{
+    private static final Logger mLog = LoggerFactory.getLogger(VectorFMDemodulator256.class);
+    protected static final float ZERO = 0.0f;
+    private static final int BUFFER_OVERLAP = 1;
+    private static final VectorSpecies<Float> VECTOR_SPECIES = FloatVector.SPECIES_256;
+
+    //Initialize buffers to be non-null and resize once the first buffer arrives
+    private float[] mIBuffer = new float[1];
+    private float[] mQBuffer = new float[1];
+
+    public VectorFMDemodulator256()
+    {
+    }
+
+    @Override public float[] demodulate(float[] i, float[] q)
+    {
+        VectorUtilities.checkComplexArrayLength(i, q, VECTOR_SPECIES);
+
+        if(mIBuffer.length != (i.length + BUFFER_OVERLAP))
+        {
+            mIBuffer = new float[i.length + BUFFER_OVERLAP];
+            mQBuffer = new float[q.length + BUFFER_OVERLAP];
+        }
+
+        //Copy last sample to beginning of buffer arrays
+        mIBuffer[0] = mIBuffer[mIBuffer.length - 1];
+        mQBuffer[0] = mQBuffer[mQBuffer.length - 1];
+
+        //Copy new samples to end of buffer arrays
+        System.arraycopy(i, 0, mIBuffer, 1, i.length);
+        System.arraycopy(q, 0, mQBuffer, 1, q.length);
+
+        float[] demodulated = new float[i.length];
+
+        FloatVector currentI, currentQ, previousI, previousQ, demod, demodI, demodQ;
+
+        for(int bufferPointer = 0; bufferPointer < mIBuffer.length - 1; bufferPointer += VECTOR_SPECIES.length())
+        {
+            previousI = FloatVector.fromArray(VECTOR_SPECIES, mIBuffer, bufferPointer);
+            previousQ = FloatVector.fromArray(VECTOR_SPECIES, mQBuffer, bufferPointer);
+            currentI = FloatVector.fromArray(VECTOR_SPECIES, mIBuffer, bufferPointer + 1);
+            currentQ = FloatVector.fromArray(VECTOR_SPECIES, mQBuffer, bufferPointer + 1);
+
+            demodI = currentI.mul(previousI).sub(currentQ.mul(previousQ.neg()));
+            demodQ = currentQ.mul(previousI).add(currentI.mul(previousQ.neg()));
+
+            //Replace any zero-values in the I vector by adding Float.MIN_VALUE to side-step divide by zero errors
+            demodI = demodI.add(Float.MIN_VALUE, demodQ.eq(ZERO));
+
+            demod = demodQ.div(demodI).lanewise(VectorOperators.ATAN);
+            demod.intoArray(demodulated, bufferPointer);
+        }
+
+        return demodulated;
+    }
+}

src/main/java/io/github/dsheirer/dsp/fm/VectorFMDemodulator512.java

@@ -0,0 +1,88 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.dsp.fm;
+
+import io.github.dsheirer.vector.VectorUtilities;
+import jdk.incubator.vector.FloatVector;
+import jdk.incubator.vector.VectorOperators;
+import jdk.incubator.vector.VectorSpecies;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * FM demodulator that uses JDK 17+ SIMD vector intrinsics
+ */
+public class VectorFMDemodulator512 implements IDemodulator
+{
+    private static final Logger mLog = LoggerFactory.getLogger(VectorFMDemodulator512.class);
+    protected static final float ZERO = 0.0f;
+    private static final int BUFFER_OVERLAP = 1;
+    private static final VectorSpecies<Float> VECTOR_SPECIES = FloatVector.SPECIES_512;
+
+    //Initialize buffers to be non-null and resize once the first buffer arrives
+    private float[] mIBuffer = new float[1];
+    private float[] mQBuffer = new float[1];
+
+    public VectorFMDemodulator512()
+    {
+    }
+
+    @Override public float[] demodulate(float[] i, float[] q)
+    {
+        VectorUtilities.checkComplexArrayLength(i, q, VECTOR_SPECIES);
+
+        if(mIBuffer.length != (i.length + BUFFER_OVERLAP))
+        {
+            mIBuffer = new float[i.length + BUFFER_OVERLAP];
+            mQBuffer = new float[q.length + BUFFER_OVERLAP];
+        }
+
+        //Copy last sample to beginning of buffer arrays
+        mIBuffer[0] = mIBuffer[mIBuffer.length - 1];
+        mQBuffer[0] = mQBuffer[mQBuffer.length - 1];
+
+        //Copy new samples to end of buffer arrays
+        System.arraycopy(i, 0, mIBuffer, 1, i.length);
+        System.arraycopy(q, 0, mQBuffer, 1, q.length);
+
+        float[] demodulated = new float[i.length];
+
+        FloatVector currentI, currentQ, previousI, previousQ, demod, demodI, demodQ;
+
+        for(int bufferPointer = 0; bufferPointer < mIBuffer.length - 1; bufferPointer += VECTOR_SPECIES.length())
+        {
+            previousI = FloatVector.fromArray(VECTOR_SPECIES, mIBuffer, bufferPointer);
+            previousQ = FloatVector.fromArray(VECTOR_SPECIES, mQBuffer, bufferPointer);
+            currentI = FloatVector.fromArray(VECTOR_SPECIES, mIBuffer, bufferPointer + 1);
+            currentQ = FloatVector.fromArray(VECTOR_SPECIES, mQBuffer, bufferPointer + 1);
+
+            demodI = currentI.mul(previousI).sub(currentQ.mul(previousQ.neg()));
+            demodQ = currentQ.mul(previousI).add(currentI.mul(previousQ.neg()));
+
+            //Replace any zero-values in the I vector by adding Float.MIN_VALUE to side-step divide by zero errors
+            demodI = demodI.add(Float.MIN_VALUE, demodQ.eq(ZERO));
+
+            demod = demodQ.div(demodI).lanewise(VectorOperators.ATAN);
+            demod.intoArray(demodulated, bufferPointer);
+        }
+
+        return demodulated;
+    }
+}

src/main/java/io/github/dsheirer/dsp/fm/VectorFMDemodulator64.java

@@ -0,0 +1,88 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.dsp.fm;
+
+import io.github.dsheirer.vector.VectorUtilities;
+import jdk.incubator.vector.FloatVector;
+import jdk.incubator.vector.VectorOperators;
+import jdk.incubator.vector.VectorSpecies;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * FM demodulator that uses JDK 17+ SIMD vector intrinsics
+ */
+public class VectorFMDemodulator64 implements IDemodulator
+{
+    private static final Logger mLog = LoggerFactory.getLogger(VectorFMDemodulator64.class);
+    protected static final float ZERO = 0.0f;
+    private static final int BUFFER_OVERLAP = 1;
+    private static final VectorSpecies<Float> VECTOR_SPECIES = FloatVector.SPECIES_64;
+
+    //Initialize buffers to be non-null and resize once the first buffer arrives
+    private float[] mIBuffer = new float[1];
+    private float[] mQBuffer = new float[1];
+
+    public VectorFMDemodulator64()
+    {
+    }
+
+    @Override public float[] demodulate(float[] i, float[] q)
+    {
+        VectorUtilities.checkComplexArrayLength(i, q, VECTOR_SPECIES);
+
+        if(mIBuffer.length != (i.length + BUFFER_OVERLAP))
+        {
+            mIBuffer = new float[i.length + BUFFER_OVERLAP];
+            mQBuffer = new float[q.length + BUFFER_OVERLAP];
+        }
+
+        //Copy last sample to beginning of buffer arrays
+        mIBuffer[0] = mIBuffer[mIBuffer.length - 1];
+        mQBuffer[0] = mQBuffer[mQBuffer.length - 1];
+
+        //Copy new samples to end of buffer arrays
+        System.arraycopy(i, 0, mIBuffer, 1, i.length);
+        System.arraycopy(q, 0, mQBuffer, 1, q.length);
+
+        float[] demodulated = new float[i.length];
+
+        FloatVector currentI, currentQ, previousI, previousQ, demod, demodI, demodQ;
+
+        for(int bufferPointer = 0; bufferPointer < mIBuffer.length - 1; bufferPointer += VECTOR_SPECIES.length())
+        {
+            previousI = FloatVector.fromArray(VECTOR_SPECIES, mIBuffer, bufferPointer);
+            previousQ = FloatVector.fromArray(VECTOR_SPECIES, mQBuffer, bufferPointer);
+            currentI = FloatVector.fromArray(VECTOR_SPECIES, mIBuffer, bufferPointer + 1);
+            currentQ = FloatVector.fromArray(VECTOR_SPECIES, mQBuffer, bufferPointer + 1);
+
+            demodI = currentI.mul(previousI).sub(currentQ.mul(previousQ.neg()));
+            demodQ = currentQ.mul(previousI).add(currentI.mul(previousQ.neg()));
+
+            //Replace any zero-values in the I vector by adding Float.MIN_VALUE to side-step divide by zero errors
+            demodI = demodI.add(Float.MIN_VALUE, demodQ.eq(ZERO));
+
+            demod = demodQ.div(demodI).lanewise(VectorOperators.ATAN);
+            demod.intoArray(demodulated, bufferPointer);
+        }
+
+        return demodulated;
+    }
+}

src/main/java/io/github/dsheirer/dsp/fm/VectorSquelchingFMDemodulator.java

@@ -1,229 +0,0 @@
-/*
- * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>
- * ****************************************************************************
- */
-
-package io.github.dsheirer.dsp.fm;
-
-import io.github.dsheirer.dsp.squelch.PowerSquelch;
-import io.github.dsheirer.sample.Listener;
-import io.github.dsheirer.source.SourceEvent;
-import io.github.dsheirer.vector.VectorUtilities;
-import jdk.incubator.vector.FloatVector;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import java.text.DecimalFormat;
-import java.util.Arrays;
-import java.util.Random;
-
-/**
- * FM Demodulator for demodulating complex samples and producing demodulated floating point samples.
- *
- * Implements listener of source events to process runtime squelch threshold change request events
- * which are forwarded to the power squelch control.
- */
-public class VectorSquelchingFMDemodulator extends VectorFMDemodulator
-        implements ISquelchingFmDemodulator, Listener<SourceEvent>
-{
-    private static final Logger mLog = LoggerFactory.getLogger(VectorSquelchingFMDemodulator.class);
-    private static final float TWO = 2.0f;
-    private PowerSquelch mPowerSquelch;
-    private boolean mSquelchChanged = false;
-
-    /**
-     * Creates an FM demodulator instance with a default gain of 1.0.
-     */
-    public VectorSquelchingFMDemodulator(float alpha, float threshold, int ramp)
-    {
-        mPowerSquelch = new PowerSquelch(alpha, threshold, ramp);
-    }
-
-    public void reset()
-    {
-    }
-
-    /**
-     * Registers the listener to receive notifications of squelch change events from the power squelch.
-     */
-    public void setSourceEventListener(Listener<SourceEvent> listener)
-    {
-        mPowerSquelch.setSourceEventListener(listener);
-    }
-
-    /**
-     * Demodulates the complex (I/Q) sample arrays
-     * @param i inphase samples
-     * @param q quadrature samples
-     * @return demodulated real samples
-     */
-    @Override
-    public float[] demodulate(float[] i, float[] q)
-    {
-        setSquelchChanged(false);
-
-        float[] demodulated = super.demodulate(i, q);
-        float[] magnitude = getMagnitude(i, q);
-
-        for(int x = 0; x < i.length; x++)
-        {
-            mPowerSquelch.process(magnitude[x]);
-
-            if(!(mPowerSquelch.isUnmuted() || mPowerSquelch.isDecay()))
-            {
-                demodulated[x] = ZERO;
-            }
-
-            if(mPowerSquelch.isSquelchChanged())
-            {
-                setSquelchChanged(true);
-            }
-        }
-
-        return demodulated;
-    }
-
-    /**
-     * Calculates the magnitude of the complex I/Q sample arrays using SIMD vector intrinsics.
-     * @param i sample array
-     * @param q sample array
-     * @return magnitude array
-     */
-    public static float[] getMagnitude(float[] i, float[] q)
-    {
-        VectorUtilities.checkComplexArrayLength(i, q, VECTOR_SPECIES);
-
-        float[] magnitudes = new float[i.length];
-        FloatVector iVector, qVector;
-
-        for(int samplePointer = 0; samplePointer < i.length; samplePointer += VECTOR_SPECIES.length())
-        {
-            iVector = FloatVector.fromArray(VECTOR_SPECIES, i, samplePointer);
-            qVector = FloatVector.fromArray(VECTOR_SPECIES, q, samplePointer);
-            iVector.pow(TWO).add(qVector.pow(TWO)).intoArray(magnitudes, samplePointer);
-        }
-
-        return magnitudes;
-    }
-
-    /**
-     * Sets the threshold for squelch control
-     * @param threshold (dB)
-     */
-    public void setSquelchThreshold(double threshold)
-    {
-        mPowerSquelch.setSquelchThreshold(threshold);
-    }
-
-    /**
-     * Indicates if the squelch state has changed during the processing of buffer(s)
-     */
-    public boolean isSquelchChanged()
-    {
-        return mSquelchChanged;
-    }
-
-    /**
-     * Sets or resets the squelch changed flag.
-     */
-    private void setSquelchChanged(boolean changed)
-    {
-        mSquelchChanged = changed;
-    }
-
-    /**
-     * Indicates if the squelch state is currently muted
-     */
-    public boolean isMuted()
-    {
-        return mPowerSquelch.isMuted();
-    }
-
-    @Override
-    public void receive(SourceEvent sourceEvent)
-    {
-        //Only forward squelch threshold change request events
-        if(sourceEvent.getEvent() == SourceEvent.Event.REQUEST_CHANGE_SQUELCH_THRESHOLD)
-        {
-            mPowerSquelch.receive(sourceEvent);
-        }
-        else if(sourceEvent.getEvent() == SourceEvent.Event.REQUEST_CURRENT_SQUELCH_THRESHOLD)
-        {
-            mPowerSquelch.receive(sourceEvent);
-        }
-    }
-
-    public static void main(String[] args)
-    {
-        int iterations = 3_000_000;
-        int sampleSize = 2048;
-
-        Random random = new Random();
-
-        float[] iSamples = new float[sampleSize];
-        float[] qSamples = new float[sampleSize];
-        for(int x = 0; x < iSamples.length; x++)
-        {
-            iSamples[x] = random.nextFloat() * 2.0f - 1.0f;
-            qSamples[x] = random.nextFloat() * 2.0f - 1.0f;
-        }
-
-
-        float POWER_SQUELCH_ALPHA_DECAY = 0.0004f;
-        float POWER_SQUELCH_THRESHOLD_DB = -78.0f;
-        int POWER_SQUELCH_RAMP = 4;
-
-        ScalarFMDemodulator fm = new ScalarFMDemodulator();
-        VectorFMDemodulator vectorFM = new VectorFMDemodulator();
-        ScalarSquelchingFMDemodulator sqLegacy = new ScalarSquelchingFMDemodulator(POWER_SQUELCH_ALPHA_DECAY, POWER_SQUELCH_THRESHOLD_DB, POWER_SQUELCH_RAMP);
-        VectorSquelchingFMDemodulator vectorSq = new VectorSquelchingFMDemodulator(POWER_SQUELCH_ALPHA_DECAY, POWER_SQUELCH_THRESHOLD_DB, POWER_SQUELCH_RAMP);
-
-        boolean validation = false;
-
-        if(validation)
-        {
-            float[] noSqFmSamples = fm.demodulate(iSamples, qSamples);
-            float[] vectorNoSqFmSamples = vectorFM.demodulate(iSamples, qSamples);
-            float[] sqFmSamples = sqLegacy.demodulate(iSamples, qSamples);
-            float[] vectorSqFmSamples = vectorSq.demodulate(iSamples, qSamples);
-            System.out.println("       NO SQ FM:" + Arrays.toString(noSqFmSamples));
-            System.out.println("VECTOR NO SQ FM:" + Arrays.toString(vectorNoSqFmSamples));
-            System.out.println("          SQ FM:" + Arrays.toString(sqFmSamples));
-            System.out.println("   VECTOR SQ FM:" + Arrays.toString(vectorSqFmSamples));
-        }
-        else
-        {
-            System.out.println("Test Starting ...");
-            long start = System.currentTimeMillis();
-
-            double accumulator = 0.0;
-
-            for(int i = 0; i < iterations; i++)
-            {
-//                float[] samples = sqLegacy.demodulate(iSamples, qSamples);
-                float[] samples = vectorSq.demodulate(iSamples, qSamples);
-                accumulator += samples[3];
-            }
-
-            double elapsed = System.currentTimeMillis() - start;
-
-            DecimalFormat df = new DecimalFormat("0.000");
-            System.out.println("Accumulator: " + accumulator);
-            System.out.println("Test Complete.  Elapsed Time: " + df.format(elapsed / 1000.0d) + " seconds");
-        }
-    }
-}

src/main/java/io/github/dsheirer/dsp/fsk/LTRDecoder.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -16,61 +16,64 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  * ****************************************************************************
  */
+
 package io.github.dsheirer.dsp.fsk;
 
-import io.github.dsheirer.bits.MessageFramer;
 import io.github.dsheirer.dsp.filter.FilterFactory;
-import io.github.dsheirer.dsp.filter.dc.IIRSinglePoleDCRemovalFilter;
 import io.github.dsheirer.dsp.filter.design.FilterDesignException;
 import io.github.dsheirer.dsp.filter.fir.FIRFilterSpecification;
 import io.github.dsheirer.dsp.filter.fir.real.IRealFilter;
 import io.github.dsheirer.dsp.filter.fir.remez.RemezFIRFilterDesigner;
-import io.github.dsheirer.dsp.symbol.ISyncDetectListener;
 import io.github.dsheirer.sample.Listener;
+import java.util.Arrays;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /**
- * Logic Trunked Radio (LTR) 300-baud FSK decoder is designed to operate against an 8 kHz FM demodulated audio stream.
+ * LTR decoder designed to work with 8 kHz input audio samples and decode 300-baud signalling.
  *
- * This decoder employs a zero-crossing timing error detector with adjustable symbol timing error gain.  This decoder
- * also employs a synchronization monitor that automatically adjusts symbol timing error gain according to the quantity
- * of successful message sync pattern detections.  This is optimized for LTR signals that periodically transmit idle
- * bursts and transmit continuous message streams during voice transmissions.  The synchronization monitor adjusts to an
- * aggressive gain value when sync is lost and automatically reduces timing error gain as successive sync pattern
- * detections occur.
+ * This decoder monitors the incoming sample stream looking for either a positive or negative sequence of samples where
+ * the energy delta across the baud period exceeds a threshold value and causes the symbol state to flip.  The symbol
+ * state remains across successive baud periods until the next state change sequence is detected.
  *
- * FM demodulated sample buffers should not be filtered prior to this decoder.  An internal DC-removal filter coupled
- * with a low-pass filter removes any tuning offset and/or audio components above 300 Hertz.  The DC removal filter is
- * adjusted for a slower offset removal in order to prevent overly distorting the FSK signalling component.  This mild
- * adjustment may not fully compensate for mis-tuned signals and may result in missed decodes of idle bursts.  However,
- * the DC filter will track a mis-tuned signal to baseband quickly upon a continuous transmission.
+ * Valid LTR messages start with a zero symbol and transition to a positive symbol for the sync bit, this decoder
+ * monitors for excessively long sequences of a one symbol and forces the symbol state back to a zero.
  */
-public class LTRDecoder implements Listener<float[]>, ISyncDetectListener, ISyncStateListener
+public class LTRDecoder implements Listener<float[]>
 {
-    private final static Logger mLog = LoggerFactory.getLogger(LTRDecoder.class);
-
-    public static final float SAMPLES_PER_SYMBOL = 8000.0f / 300.0f;
-
-    protected static final float COARSE_TIMING_GAIN = 1.0f / 3.0f;
-    protected static final float MEDIUM_TIMING_GAIN = 1.0f / 4.0f;
-    protected static final float FINE_TIMING_GAIN = 1.0f / 5.0f;
+    private static final Logger mLog = LoggerFactory.getLogger(LTRDecoder.class);
+    //Slope calculation sumXX value is always the same for 27 evenly spaced samples
+    private static final double SLOPE_CALCULATION_SUM_XX = 1637.999992057681;
+    private static final float BAUD_LENGTH = 8000.0f / 300.0f;
+    private static final float SLOPE_THRESHOLD = 0.0048f;
+    private static final int MAX_ONES_SEQUENCE = 18;
+    private static final int OVERLAP = 26;
+    private static final int POST_TRANSITION_SAMPLES_TO_SKIP = 26;
+    private static final int SLOPE_CALCULATION_LENGTH = 27;
+    private static final int SYMBOL_TRANSITION_IDEAL_MIN = 11;
+    private static final int SYMBOL_TRANSITION_IDEAL_MAX = 16;
 
     private static float[] sLowPassFilterCoefficients;
+    private boolean mSymbol = false;
+    private float[] mResidual = new float[OVERLAP];
+    private float mBaudCounter = 0f;
+    private float mMaxSlope = 0;
+    private int mExcessiveOneSequenceCounter = 0;
+    private Listener<boolean[]> mSymbolListener;
 
     static
     {
         FIRFilterSpecification specification = FIRFilterSpecification.lowPassBuilder()
-            .sampleRate(8000)
-            .gridDensity(16)
-            .oddLength(true)
-            .passBandCutoff(300)
-            .passBandAmplitude(1.0)
-            .passBandRipple(0.01)
-            .stopBandStart(500)
-            .stopBandAmplitude(0.0)
-            .stopBandRipple(0.03) //Approximately 60 dB attenuation
-            .build();
+                .sampleRate(8000)
+                .gridDensity(16)
+                .oddLength(true)
+                .passBandCutoff(300)
+                .passBandAmplitude(1.0)
+                .passBandRipple(0.01)
+                .stopBandStart(500)
+                .stopBandAmplitude(0.0)
+                .stopBandRipple(0.03) //Approximately 60 dB attenuation
+                .build();
 
         try
         {
@@ -87,143 +90,193 @@ public class LTRDecoder implements Listener<float[]>, ISyncDetectListener, ISync
         }
     }
 
-    protected float mSymbolTimingGain = COARSE_TIMING_GAIN;
-    protected SampleBuffer mSampleBuffer;
-    protected ZeroCrossingErrorDetector mTimingErrorDetector = new ZeroCrossingErrorDetector(SAMPLES_PER_SYMBOL);
-    protected SynchronizationMonitor mSynchronizationMonitor;
-    private IIRSinglePoleDCRemovalFilter mDCFilter = new IIRSinglePoleDCRemovalFilter(0.99999f);
     private IRealFilter mLowPassFilter = FilterFactory.getRealFilter(sLowPassFilterCoefficients);
-    private MessageFramer mMessageFramer;
-
-    private boolean mSampleDecision;
 
     /**
-     * Implements a Logic Trunked Radio sub-audible 300 baud FSK signaling decoder
-     *
-     * @param messageLength in symbols
+     * Constructs an instance
      */
-    public LTRDecoder(int messageLength)
+    public LTRDecoder()
     {
-        this(messageLength, new SampleBuffer(SAMPLES_PER_SYMBOL, COARSE_TIMING_GAIN),
-            new ZeroCrossingErrorDetector(SAMPLES_PER_SYMBOL));
     }
 
     /**
-     * Implements a Logic Trunked Radio sub-audible 300 baud FSK signaling decoder.
-     *
-     * @param messageLength in symbols
-     * @param sampleBuffer to use for storing sample decisions
-     * @param detector for symbol timing errors
+     * Registers the listener to receive decoded symbols.
+     * @param listener to register
      */
-    public LTRDecoder(int messageLength, SampleBuffer sampleBuffer, ZeroCrossingErrorDetector detector)
+    public void setListener(Listener<boolean[]> listener)
     {
-        mSynchronizationMonitor = new SynchronizationMonitor(messageLength);
-        mSynchronizationMonitor.setListener(this);
-        mTimingErrorDetector = detector;
-        mSampleBuffer = sampleBuffer;
-        mSampleBuffer.setTimingGain(mSymbolTimingGain);
+        mSymbolListener = listener;
     }
 
     /**
-     * Implements the ISyncDetectedListener interface to be notified of message sync detection events.
-     *
-     * This allows the internal timing error detector to adjust symbol timing error gain levels according to the
-     * message synchronization state to quickly adjust to initial signal streams or to reduce gain levels once
-     * synchronization has been achieved.
+     * Processes the demodulated 8 kHz audio samples to extract the 300-baud LTR signalling and delivers the decoded
+     * symbol array to the registered listener.
+     * @param samples to demodulate.
      */
-    @Override
-    public void syncDetected(int bitErrors)
+    public void receive(float[] samples)
     {
-        mSynchronizationMonitor.syncDetected(bitErrors);
-    }
-
-    @Override
-    public void syncLost(int bitsProcessed)
-    {
-        //no-op
-    }
-
-    /**
-     * Processes the buffer samples by converting all samples to boolean values reflecting if the sample value is
-     * greater than zero (or not).  Average symbol timing offset is calculated for the full buffer and the offset is
-     * adjusted and then each of the symbols are decoded using a simple majority decision.
-     *
-     * @param buffer containing 8.0 kHz unfiltered FM demodulated audio samples with sub-audible LTR signalling.
-     */
-    @Override
-    public void receive(float[] buffer)
-    {
-        float[] dcFiltered = mDCFilter.filter(buffer);
-        float[] lowPassFiltered = mLowPassFilter.filter(dcFiltered);
-
-        for(float sample : lowPassFiltered)
+        if(mSymbolListener != null)
         {
-            mSampleDecision = sample > 0.0;
+            float[] filtered = mLowPassFilter.filter(samples);
 
-            mSampleBuffer.receive(mSampleDecision);
-            mTimingErrorDetector.receive(mSampleDecision);
+            int timingAdjust = 0;
+            int samplesToSkip = 0;
 
-            if(mSampleBuffer.hasSymbol())
+            float[] buffer = new float[filtered.length + OVERLAP];
+            boolean[] symbols = new boolean[(int)((filtered.length + mBaudCounter) / BAUD_LENGTH)];
+            int symbolPointer = 0;
+            float slope = 0;
+
+            try
             {
-                if(mMessageFramer != null)
+                System.arraycopy(mResidual, 0, buffer, 0, mResidual.length);
+                System.arraycopy(filtered, 0, buffer, mResidual.length, filtered.length);
+                System.arraycopy(filtered, filtered.length - OVERLAP, mResidual, 0, OVERLAP);
+
+                for(int bufferPointer = 0; bufferPointer < samples.length; bufferPointer++)
                 {
-                    mMessageFramer.process(mSampleBuffer.getSymbol());
+                    //Don't calculate slope if we're within the baud period following last symbol transition
+                    if(samplesToSkip > 0)
+                    {
+                        samplesToSkip--;
+                    }
+                    else
+                    {
+                        slope = calculateSlope(buffer, bufferPointer);
+
+                        if(mSymbol)
+                        {
+                            //Loop for crest of slope at lowest point below the negative slope threshold for transition
+                            if(slope > mMaxSlope && mMaxSlope < -SLOPE_THRESHOLD)
+                            {
+                                mSymbol = false;
+
+                                //Coarse symbol timing adjust - ideal toggle is middle of baud, between 11 & 16 samples
+                                if(mBaudCounter < SYMBOL_TRANSITION_IDEAL_MIN)
+                                {
+                                    timingAdjust = 1;
+                                }
+                                else if(mBaudCounter > SYMBOL_TRANSITION_IDEAL_MAX)
+                                {
+                                    timingAdjust = -1;
+                                }
+                                else
+                                {
+                                    timingAdjust = 0;
+                                }
+
+                                mBaudCounter += timingAdjust;
+                                samplesToSkip = POST_TRANSITION_SAMPLES_TO_SKIP + timingAdjust;
+                            }
+                            else if(slope < mMaxSlope)
+                            {
+                                mMaxSlope = slope;
+                            }
+                        }
+                        else
+                        {
+                            //Loop for crest of slope at the highest point above the positive threshold
+                            if(slope < mMaxSlope && mMaxSlope > SLOPE_THRESHOLD)
+                            {
+                                mSymbol = true;
+
+                                //Coarse symbol timing adjust - ideal toggle is middle of baud, between 11 & 16 samples
+                                if(mBaudCounter < SYMBOL_TRANSITION_IDEAL_MIN)
+                                {
+                                    timingAdjust = 1;
+                                }
+                                else if(mBaudCounter > SYMBOL_TRANSITION_IDEAL_MAX)
+                                {
+                                    timingAdjust = -1;
+                                }
+                                else
+                                {
+                                    timingAdjust = 0;
+                                }
+                                mBaudCounter += timingAdjust;
+                                samplesToSkip = 26 + timingAdjust;
+                            }
+                            else if(slope > mMaxSlope)
+                            {
+                                mMaxSlope = slope;
+                            }
+                        }
+                    }
+
+                    mBaudCounter++;
+
+                    if(mBaudCounter > BAUD_LENGTH)
+                    {
+                        //Expand symbols array length if needed to account for symbol timing adjustments
+                        if(symbolPointer >= symbols.length)
+                        {
+                            symbols = Arrays.copyOf(symbols, symbols.length + 1);
+                        }
+
+                        symbols[symbolPointer++] = mSymbol;
+
+                        mBaudCounter -= BAUD_LENGTH;
+
+                        //Check for a continuous string of ones and flip the symbol state to zero.
+                        if(mSymbol)
+                        {
+                            mExcessiveOneSequenceCounter++;
+
+                            if(mExcessiveOneSequenceCounter > MAX_ONES_SEQUENCE)  //Verify that this is the right threshold for a string of ones
+                            {
+                                mSymbol = false;
+                                mMaxSlope = -1f;
+                                mExcessiveOneSequenceCounter = 0;
+                            }
+                        }
+                        else
+                        {
+                            mExcessiveOneSequenceCounter = 0;
+                        }
+                    }
                 }
+            }
+            catch(Exception e)
+            {
+                mLog.warn("Unexpected error while processing LTR samples", e);
+            }
 
-                mSampleBuffer.resetAndAdjust(-mTimingErrorDetector.getError());
-
-                mSynchronizationMonitor.increment();
+            //Truncate the symbols array if we didn't fill it completely, due to symbol timing adjustments.
+            if(symbolPointer != symbols.length)
+            {
+                mSymbolListener.receive(Arrays.copyOf(symbols, symbolPointer));
+            }
+            else
+            {
+                mSymbolListener.receive(symbols);
             }
         }
     }
 
     /**
-     * Registers a listener to receive decoded LTR symbols.
-     *
-     * @param messageFramer to receive symbols.
+     * Calculates the slope of the 27 samples in the values array starting at the specified offset.
+     * @param samples to load from
+     * @param offset to the sample start for the slope calculation
      */
-    public void setMessageFramer(MessageFramer messageFramer)
+    public float calculateSlope(float[] samples, int offset)
     {
-        mMessageFramer = messageFramer;
-    }
+        /** mean of accumulated x & y values, used in updating formulas */
+        double xbar = 0;
+        double ybar = samples[offset];
 
-    /**
-     * Removes the symbol listener from receiving decoded LTR symbols.
-     */
-    public void removeListener()
-    {
-        mMessageFramer = null;
-    }
+        double sumXY = 0;
+        double fact1, dx, dy;
 
-
-    /**
-     * Implements the ISyncStateListener interface to receive synchronization state events and adjust the symbol timing
-     * error gain levels on the internal timing error detector.
-     *
-     * Gain levels are defined relative to a unit gain of 1.0 over a number of symbol periods.  LTR uses an initial
-     * ramp-up symbol reversal pattern of 0101 which provides three zero crossing detection opportunities for the timing
-     * error detector, therefore we react to a COARSE gain state to average timing error over 3 symbols.
-     *
-     * @param syncState from an external synchronization state monitor
-     */
-    @Override
-    public void setSyncState(SyncState syncState)
-    {
-        switch(syncState)
+        for(int x = 1; x < SLOPE_CALCULATION_LENGTH; x++)
         {
-            case FINE:
-                mSymbolTimingGain = FINE_TIMING_GAIN;
-                break;
-            case MEDIUM:
-                mSymbolTimingGain = MEDIUM_TIMING_GAIN;
-                break;
-            case COARSE:
-                mSymbolTimingGain = COARSE_TIMING_GAIN;
-                break;
-            default:
-                throw new IllegalArgumentException("Unrecognized sync state level: " + syncState.name());
+            fact1 = 1.0f + x;
+            dx = x - xbar;
+            dy = samples[offset + x] - ybar;
+            sumXY += dx * dy * (x / (1.0f + x));
+            xbar += dx / fact1;
+            ybar += dy / fact1;
         }
 
-        mSampleBuffer.setTimingGain(mSymbolTimingGain);
+        return (float)(sumXY / SLOPE_CALCULATION_SUM_XX);
     }
 }

src/main/java/io/github/dsheirer/dsp/fsk/LTRDecoderInstrumented.java

@@ -1,40 +1,30 @@
-/*******************************************************************************
- * sdr-trunk
- * Copyright (C) 2014-2018 Dennis Sheirer
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
- * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
- * License as published by  the Free Software Foundation, either version 3 of the License, or  (at your option) any
- * later version.
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
- * This program is distributed in the hope that it will be useful,  but WITHOUT ANY WARRANTY; without even the implied
- * warranty of  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License  along with this program.
- * If not, see <http://www.gnu.org/licenses/>
- *
- ******************************************************************************/
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
 package io.github.dsheirer.dsp.fsk;
 
 public class LTRDecoderInstrumented extends LTRDecoder
 {
     /**
      * Instrumented extension to LTRDecoder
-     *
-     * @param messageLength in symbols
      */
-    public LTRDecoderInstrumented(int messageLength)
+    public LTRDecoderInstrumented()
     {
-        super(messageLength, new SampleBufferInstrumented(SAMPLES_PER_SYMBOL, COARSE_TIMING_GAIN),
-            new ZeroCrossingErrorDetectorInstrumented(SAMPLES_PER_SYMBOL));
-    }
-
-    public SampleBufferInstrumented getSampleBuffer()
-    {
-        return (SampleBufferInstrumented)mSampleBuffer;
-    }
-
-    public ZeroCrossingErrorDetectorInstrumented getErrorDetector()
-    {
-        return (ZeroCrossingErrorDetectorInstrumented)mTimingErrorDetector;
+        super();
     }
 }

src/main/java/io/github/dsheirer/dsp/gain/AudioGainAndDcFilter.java

@@ -0,0 +1,139 @@
+/*
+ * *****************************************************************************
+ * Copyright (C) 2014-2023 Dennis Sheirer
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
+ */
+
+package io.github.dsheirer.dsp.gain;
+
+import org.apache.commons.math3.util.FastMath;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Audio gain that normalizes audio amplitude against an objective amplitude value where the audio amplitude values
+ * normally fall in the range of -1.0 to 1.0.
+ *
+ * Removes DC bias on a per audio sample buffer basis.
+ *
+ * This control is designed to work on a per-call basis by monitoring the maximum observed amplitude and adjusting the
+ * gain to normalize the amplitude toward the objective amplitude value.  This control is designed to be reset at the
+ * beginning/end of each call segment so that the max observed amplitude is relevant to the current call segment.
+ *
+ * Min and max gains should be sized to constrain the applied value during periods of extended silence at the
+ * beginning of an audio segment or where a single amplitude spike might erroneously affect gain across the segment.
+ */
+public class AudioGainAndDcFilter
+{
+    private static final Logger mLog = LoggerFactory.getLogger(AudioGainAndDcFilter.class);
+    private static final float MAX_AMPLITUDE = 0.95f;
+    private static final float GAIN_LOOP_BANDWIDTH = 0.0015f;
+    private float mMinGain;
+    private float mMaxGain;
+    private float mCurrentGain;
+    private float mObjectiveGain;
+    private float mObjectiveAmplitude;
+    private float mMaxObservedAmplitude;
+
+    /**
+     * Constructs an instance
+     * @param minGain to apply to the incoming sample stream.
+     * @param maxGain to apply
+     * @param objectiveAmplitude to achieve by adjusting gain between min and max.
+     */
+    public AudioGainAndDcFilter(float minGain, float maxGain, float objectiveAmplitude)
+    {
+        mMinGain = minGain;
+        mMaxGain = maxGain;
+        mObjectiveAmplitude = objectiveAmplitude;
+        reset();
+    }
+
+    /**
+     * Resets this gain control to prepare for the next audio call/segment.
+     */
+    public void reset()
+    {
+        mMaxObservedAmplitude = 0.0f;
+        mObjectiveGain = 1.0f;
+        mCurrentGain = 1.0f;
+    }
+
+    /**
+     * Process a buffer of audio samples and apply gain.
+     * @param samples to adjust.
+     * @return amplified audio samples
+     */
+    public float[] process(float[] samples)
+    {
+        float currentAmplitude;
+        float dcAccumulator = 0.0f;
+
+        //Decay the max observed value by 10% each buffer so that an initial spike doesn't carry across all buffers
+        mMaxObservedAmplitude *= 0.9f;
+
+        for(float sample: samples)
+        {
+            dcAccumulator += sample;
+            currentAmplitude = FastMath.min(Math.abs(sample), 2.0f);
+
+            if(currentAmplitude > mMaxObservedAmplitude)
+            {
+                mMaxObservedAmplitude = currentAmplitude;
+            }
+        }
+
+        mObjectiveGain = mObjectiveAmplitude / mMaxObservedAmplitude;
+
+        if(mObjectiveGain > mMaxGain)
+        {
+            mObjectiveGain = mMaxGain;
+        }
+        else if(mObjectiveGain < mMinGain)
+        {
+            mObjectiveGain = mMinGain;
+        }
+
+        float dcOffset = dcAccumulator / samples.length;
+        float gain = mCurrentGain;
+        float objective = mObjectiveGain;
+        float[] processed = new float[samples.length];
+        boolean objectiveAchieved = (gain == objective);
+        float amplified;
+
+        for(int x = 0; x < samples.length; x++)
+        {
+            if(!objectiveAchieved)
+            {
+                gain += ((objective - gain) * GAIN_LOOP_BANDWIDTH);
+                if(Math.abs(objective - gain) < 0.00005f)
+                {
+                    gain = objective;
+                    objectiveAchieved = true;
+                }
+            }
+
+            amplified = (samples[x] - dcOffset) * gain;
+            amplified = FastMath.min(amplified, MAX_AMPLITUDE);
+            amplified = FastMath.max(amplified, -MAX_AMPLITUDE);
+            processed[x] = amplified;
+        }
+
+        mCurrentGain = gain;
+        mObjectiveGain = objective;
+        return processed;
+    }
+}

src/main/java/io/github/dsheirer/dsp/gain/AutomaticGainControl.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- * Copyright (C) 2014-2022 Dennis Sheirer
+ * Copyright (C) 2014-2023 Dennis Sheirer
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -19,88 +19,80 @@
 
 package io.github.dsheirer.dsp.gain;
 
-import io.github.dsheirer.buffer.DoubleCircularBuffer;
-import io.github.dsheirer.buffer.RealCircularBuffer;
+import io.github.dsheirer.buffer.FloatCircularBuffer;
+import io.github.dsheirer.source.wave.RealWaveSource;
 import org.apache.commons.math3.util.FastMath;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
+import java.io.File;
+
+/**
+ * Audio automatic gain control.
+ */
 public class AutomaticGainControl
 {
-    private static final double SAMPLE_RATE = 48000;
-
+    private static final Logger mLog = LoggerFactory.getLogger(AutomaticGainControl.class);
+    private static final float SAMPLE_RATE = 8000;
     /* Signal delay line - time delay in seconds */
-//	private static final double DELAY_TIME_CONSTANT = 0.015;
-    private static final double DELAY_TIME_CONSTANT = 0.01;
-
+    private static final float DELAY_TIME_CONSTANT = 0.015f;
     /* Peak detector window - time delay in seconds */
-    private static final double WINDOW_TIME_CONSTANT = 0.018;
-
+    private static final float WINDOW_TIME_CONSTANT = 0.018f;
     /* Attack time constants in seconds */
-    private static final double ATTACK_RISE_TIME_CONSTANT = 0.002;
-    private static final double ATTACK_FALL_TIME_CONSTANT = 0.005;
-
-    private static final double ATTACK_RISE_ALPHA = 1.0 -
-        FastMath.exp(-1.0 / SAMPLE_RATE * ATTACK_RISE_TIME_CONSTANT);
-
-    private static final double ATTACK_FALL_ALPHA = 1.0 -
-        FastMath.exp(-1.0 / SAMPLE_RATE * ATTACK_FALL_TIME_CONSTANT);
-
+    private static final float ATTACK_RISE_TIME_CONSTANT = 0.002f;
+    private static final float ATTACK_FALL_TIME_CONSTANT = 0.005f;
+    private static final float ATTACK_RISE_ALPHA = 1.0f - (float)FastMath.exp(-1.0 / SAMPLE_RATE * ATTACK_RISE_TIME_CONSTANT);
+    private static final float ATTACK_FALL_ALPHA = 1.0f - (float)FastMath.exp(-1.0 / SAMPLE_RATE * ATTACK_FALL_TIME_CONSTANT);
     /* AGC decay value in milliseconds (20 to 5000) */
-    private static final double DECAY = 200;
-
-    /* Ratio between rise and fall times of decay time constants - adjust for
-     * best action with SSB */
-    private static final double DECAY_RISEFALL_RATIO = 0.3;
-
-    private static final double DECAY_RISE_ALPHA = 1.0 -
-        FastMath.exp(-1.0 / (SAMPLE_RATE * DECAY * .001 * DECAY_RISEFALL_RATIO));
-
-    private static final double DECAY_FALL_ALPHA = 1.0 -
-        FastMath.exp(-1.0 / (SAMPLE_RATE * DECAY * .001));
-
-    /* Hang timer release decay time constant in seconds */
-    @SuppressWarnings("unused")
-    private static final double RELEASE_TIME_CONSTANT = 0.05;
-
-    /* Specifies the AGC Knee in dB if AGC is active (nominal range -160 to 0 dB) */
-    private static final double THRESHOLD = -100;
-
-    /* Limit output to about 3db of maximum */
-    private static final double AGC_OUT_SCALE = 0.7;
-
+    private static final float DECAY = 200.0f;
+    /* Ratio between rise and fall times of decay time constants - adjust for best action with SSB */
+    private static final float DECAY_RISEFALL_RATIO = 0.3f;
+    private static final float DECAY_RISE_ALPHA = 1.0f - (float)FastMath.exp(-1.0 / (SAMPLE_RATE * DECAY * .001 * DECAY_RISEFALL_RATIO));
+    private static final float DECAY_FALL_ALPHA = 1.f - (float)FastMath.exp(-1.0 / (SAMPLE_RATE * DECAY * .001));
     /* Keep max input and output the same */
-    private static final double MAX_AMPLITUDE = 32767.0; //1.0;
-    private static final double MAX_MANUAL_AMPLITUDE = 32767.0; //1.0;
-
+    private static final float MAX_AMPLITUDE = 1.0f; //1.0;
+    private static final float MAX_MANUAL_AMPLITUDE = 1.0f; //1.0;
     /* Specifies AGC manual gain in dB if AGC is not active ( 0 to 100 dB) */
-    private static final double MANUAL_GAIN = 0.0;
-
-    private static final double MANUAL_AGC_GAIN = MAX_MANUAL_AMPLITUDE *
-        FastMath.pow(10.0, MANUAL_GAIN / 20.0);
-
+    private static final float MANUAL_GAIN = 0.0f;
+    private static final float MANUAL_AGC_GAIN = MAX_MANUAL_AMPLITUDE * (float)FastMath.pow(10.0, MANUAL_GAIN / 20.0);
+    /* Limit output to about 3db of maximum */
+    private static final float AGC_OUT_SCALE = 0.95f; //0.7f;
     /* Specifies dB reduction in output at knee from max output level (0 - 10dB) */
-    private static final double SLOPE_FACTOR = 2.0;
-
-    private static final double KNEE = THRESHOLD / 20.0;
-
-    private static final double GAIN_SLOPE = SLOPE_FACTOR / 100.0;
-
-    private static final double FIXED_GAIN = AGC_OUT_SCALE *
-        FastMath.pow(10.0, KNEE * (GAIN_SLOPE - 1.0));
-
+    private static final float SLOPE_FACTOR = 2.0f;
+    /* Specifies the threshold when the AGC kicks in (nominal range -160 to 0 dB) */
+    private static final float THRESHOLD = -20.0f; //-20.0f
+    private static final float KNEE = THRESHOLD / 20.0f; //20.0f
+    private static final float GAIN_SLOPE = SLOPE_FACTOR / 100.0f;
+    private static final float FIXED_GAIN = AGC_OUT_SCALE * (float)FastMath.pow(10.0, KNEE * (GAIN_SLOPE - 1.0));
     /* Constant for calc log() so that a value of 0 magnitude = -8 */
-    private static final double MIN_CONSTANT = 3.2767E-4;
-
+    private static final float MIN_CONSTANT = 3.2767E-4f;
     private boolean mAGCEnabled = true;
+    private float mPeakMagnitude = -5.0f;
+    private float mAttackAverage = 0.0f;
+    private float mDecayAverage = 0.0f;
+    private FloatCircularBuffer mDelayBuffer = new FloatCircularBuffer((int)(SAMPLE_RATE * DELAY_TIME_CONSTANT));
+    private FloatCircularBuffer mMagnitudeBuffer = new FloatCircularBuffer((int)(SAMPLE_RATE * WINDOW_TIME_CONSTANT), mPeakMagnitude);
+    private float mMaxGain = 0f;
+    private float mMinGain = 100000f;
 
-    private double mPeakMagnitude = 0.0;
-    private double mAttackAverage = 0.0;
-    private double mDecayAverage = 0.0;
-
-    private RealCircularBuffer mDelayBuffer = new RealCircularBuffer((int)(SAMPLE_RATE * DELAY_TIME_CONSTANT));
-    private DoubleCircularBuffer mMagnitudeBuffer = new DoubleCircularBuffer((int)(SAMPLE_RATE * WINDOW_TIME_CONSTANT));
-
+    /**
+     * Construct an instance
+     */
     public AutomaticGainControl()
     {
+        System.out.println("Fixed gain: " + FIXED_GAIN + " Knee: " + KNEE + " Gain Slope:" + GAIN_SLOPE);
+        System.out.println("Manual gain: " + MANUAL_AGC_GAIN);
+    }
+
+    public void reset()
+    {
+        mLog.info("Previous - Min Gain: " + mMinGain + " Max Gain: " + mMaxGain);
+        mLog.info("Resetting - Peak:" + mPeakMagnitude + " Attack:" + mAttackAverage + " Decay:" + mDecayAverage + " Mag Max:" + mMagnitudeBuffer.max(mPeakMagnitude));
+        mPeakMagnitude = -8.0f;
+        mAttackAverage = -8.0f;
+        mDecayAverage = -8.0f;
+        mDelayBuffer.reset(0.0f);
+        mMagnitudeBuffer.reset(mPeakMagnitude);
     }
 
     /**
@@ -130,15 +122,14 @@ public class AutomaticGainControl
      */
     public float process(float currentSample)
     {
-        float delayedSample = mDelayBuffer.putAndGet(currentSample);
+        float delayedSample = mDelayBuffer.get(currentSample);
 
-        double gain = MANUAL_AGC_GAIN;
+        float gain = MANUAL_AGC_GAIN;
 
         if(mAGCEnabled)
         {
-            double currentMagnitude = FastMath.log10(FastMath.abs(currentSample) + MIN_CONSTANT) - FastMath.log10(MAX_AMPLITUDE);
-
-            double delayedMagnitude = mMagnitudeBuffer.get(currentMagnitude);
+            float currentMagnitude = (float)(FastMath.log10(FastMath.abs(currentSample) + MIN_CONSTANT) - FastMath.log10(MAX_AMPLITUDE));
+            float delayedMagnitude = mMagnitudeBuffer.get(currentMagnitude);
 
             if(currentMagnitude > mPeakMagnitude)
             {
@@ -148,29 +139,30 @@ public class AutomaticGainControl
             else if(delayedMagnitude == mPeakMagnitude)
             {
                 /* If delayed magnitude is the current peak, then find a new peak */
-                mPeakMagnitude = mMagnitudeBuffer.max();
+                mPeakMagnitude = mMagnitudeBuffer.max(-3.4845634f);
             }
 
             /* Exponential decay mode */
             if(mPeakMagnitude > mAttackAverage)
             {
-                mAttackAverage = ((1.0 - ATTACK_RISE_ALPHA) * mAttackAverage) + (ATTACK_RISE_ALPHA * mPeakMagnitude);
+                mAttackAverage = ((1.0f - ATTACK_RISE_ALPHA) * mAttackAverage) + (ATTACK_RISE_ALPHA * mPeakMagnitude);
             }
             else
             {
-                mAttackAverage = ((1.0 - ATTACK_FALL_ALPHA) * mAttackAverage) + (ATTACK_FALL_ALPHA * mPeakMagnitude);
+                mAttackAverage = ((1.0f - ATTACK_FALL_ALPHA) * mAttackAverage) + (ATTACK_FALL_ALPHA * mPeakMagnitude);
             }
 
             if(mPeakMagnitude > mDecayAverage)
             {
-                mDecayAverage = ((1.0 - DECAY_RISE_ALPHA) * mDecayAverage) + (DECAY_RISE_ALPHA * mPeakMagnitude);
+                mDecayAverage = ((1.0f - DECAY_RISE_ALPHA) * mDecayAverage) + (DECAY_RISE_ALPHA * mPeakMagnitude);
             }
             else
             {
-                mDecayAverage = ((1.0 - DECAY_FALL_ALPHA) * mDecayAverage) + (DECAY_RISE_ALPHA * mPeakMagnitude);
+                mDecayAverage = ((1.0f - DECAY_FALL_ALPHA) * mDecayAverage) + (DECAY_RISE_ALPHA * mPeakMagnitude);
             }
 
-            double magnitude = FastMath.max(mAttackAverage, mDecayAverage);
+
+            float magnitude = FastMath.max(mAttackAverage, mDecayAverage);
 
             if(magnitude < KNEE)
             {
@@ -178,11 +170,24 @@ public class AutomaticGainControl
             }
             else
             {
-                gain = AGC_OUT_SCALE * FastMath.pow(10.0, magnitude * (GAIN_SLOPE - 1.0));
+                gain = AGC_OUT_SCALE * (float)FastMath.pow(10.0, magnitude * (GAIN_SLOPE - 1.0));
             }
+
+            System.out.println("Current Mag: " + currentMagnitude + " Delay Mag: " + delayedMagnitude +
+                    " Peak:" + mPeakMagnitude + " Gain:" + gain +
+                    " Attack Avg:" + mAttackAverage + " Decay Avg:" + mDecayAverage);
         }
 
-        return (float)(delayedSample * gain);
+        if(gain < mMinGain)
+        {
+            mMinGain = gain;
+        }
+        if(gain > mMaxGain)
+        {
+            mMaxGain = gain;
+        }
+
+        return delayedSample * gain;
     }
 
     /**
@@ -202,4 +207,5 @@ public class AutomaticGainControl
     {
         return mAGCEnabled;
     }
+
 }