Merge pull request #1601 from DSheirer/1368-decode-event-filtering-2

1368 Enhance Message & Event Filtering Options

.github/workflows/gradle.yml

@@ -22,13 +22,13 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      - name: Set up JDK 19
-        uses: actions/setup-java@v2
+      - 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

.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="19" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_X" default="true" project-jdk-name="liberica-20" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>

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

@@ -53,12 +53,12 @@ repositories {
     maven { url "https://jitpack.io" }
 }
 
-version = '0.6.0-alpha6'
+version = '0.6.0-alpha7'
 
-//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)
     }
 }
 
@@ -197,16 +197,16 @@ 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'
+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'
 
 /**
  * Download URLs to download the JDK as part of the gradle build packaging process
  */
-def jdk_download_base = "https://download.bell-sw.com/java/19.0.1+11/bellsoft-jdk19.0.1+11-"
+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

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/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);
         }
     }

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

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- *  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
@@ -24,9 +24,7 @@ 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;
@@ -62,6 +60,11 @@ public class RdioScannerConfiguration extends BroadcastConfiguration
         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");
+        }
     }
 
     /**

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

@@ -276,8 +276,7 @@ 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");
         }
     }
 

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/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/channel/metadata/NowPlayingPanel.java

@@ -35,11 +35,11 @@ import javax.swing.JPanel;
 
 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;
 
     /**
      * GUI panel that combines the currently decoding channels metadata table and viewers for channel details,

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/psk/PSKDemodulator.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
@@ -30,6 +30,7 @@ public abstract class PSKDemodulator<T> implements ComplexSampleListener
     private IPhaseLockedLoop mPLL;
     private Complex mReceivedSample = new Complex(0, 0);
     private Listener<T> mSymbolListener;
+    private boolean mRunning;
 
     /**
      * Abstract Phase Shift Keyed (PSK) demodulator
@@ -42,6 +43,31 @@ public abstract class PSKDemodulator<T> implements ComplexSampleListener
         mPLL = phaseLockedLoop;
     }
 
+    /**
+     * Starts this decoder and sets the running flag to true
+     */
+    public void start()
+    {
+        mRunning = true;
+    }
+
+    /**
+     * Stops this decoder and sets the running flag to false.
+     */
+    public void stop()
+    {
+        mRunning = false;
+    }
+
+    /**
+     * Indicates if this demodulator is running and capable of processing samples
+     * @return true if running
+     */
+    public boolean isRunning()
+    {
+        return mRunning;
+    }
+
     /**
      * Registers the listener to receive symbol decisions from this demodulator
      */
@@ -90,7 +116,10 @@ public abstract class PSKDemodulator<T> implements ComplexSampleListener
 
         for(int x = 0; x < i.length; x++)
         {
-            receive(i[x], q[x]);
+            if(isRunning())
+            {
+                receive(i[x], q[x]);
+            }
         }
     }
 

src/main/java/io/github/dsheirer/edac/CRCLTR.java

@@ -1,24 +1,24 @@
-/*******************************************************************************
- *     SDR Trunk 
- *     Copyright (C) 2014 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/>
- ******************************************************************************/
+/*
+ * *****************************************************************************
+ * 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.edac;
 
 import io.github.dsheirer.message.MessageDirection;
-
 import java.util.BitSet;
 
 /**
@@ -98,6 +98,14 @@ public class CRCLTR
 
 		return CRC.FAILED_CRC;
 	}
+
+	public static String getCRCReason(BitSet msg, MessageDirection direction)
+	{
+		int calculated = getCalculatedChecksum( msg );
+		int transmitted = getTransmittedChecksum( msg );
+		return "CALC: " + Integer.toHexString(calculated).toUpperCase() +
+				" TRANS: " + Integer.toHexString(transmitted).toUpperCase();
+	}
 	
 	public static byte[] getChecks()
 	{

src/main/java/io/github/dsheirer/filter/AllPassFilter.java

@@ -1,35 +1,61 @@
+/*
+ * *****************************************************************************
+ * 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.filter;
 
-import java.util.Collections;
-import java.util.List;
+import java.util.function.Function;
 
 /**
- * Implements a message filter that passes (true) all messages
+ * Implements an all-pass filter that automatically passes/allows any presented object.
+ *
+ * A key type of String is used, but that makes no difference in how this filter functions.
  */
-@SuppressWarnings( "rawtypes" )
-public class AllPassFilter<T> extends Filter<T>
+public class AllPassFilter<T> extends Filter<T, String>
 {
-	public AllPassFilter()
+	private static final String KEY = "Other/Unlisted";
+	private final AllPassKeyExtractor mKeyExtractor = new AllPassKeyExtractor();
+
+	/**
+	 * Constructor
+	 * @param name to display for this filter
+	 */
+    public AllPassFilter(String name)
+    {
+        super(name);
+		add(new FilterElement<>(KEY));
+    }
+
+	@Override
+	public Function getKeyExtractor()
 	{
-		super( "Allow All Messages" );
+		return mKeyExtractor;
 	}
-	
-	@Override
-    public boolean passes( T t )
-    {
-	    return true;
-    }
 
-	@Override
-    public boolean canProcess( T t )
-    {
-	    return true;
-    }
-
-    @Override
-	@SuppressWarnings( "unchecked" )
-    public List getFilterElements()
-    {
-		return Collections.EMPTY_LIST;
-    }
+	/**
+	 * Key extractor that always returns the same (String)key.
+	 */
+	public class AllPassKeyExtractor implements Function<T,String>
+	{
+		@Override
+		public String apply(T t)
+		{
+			return KEY;
+		}
+	}
 }

src/main/java/io/github/dsheirer/filter/Filter.java

@@ -1,55 +1,206 @@
+/*
+ * *****************************************************************************
+ * 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.filter;
 
+import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
+import java.util.function.Function;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
-public abstract class Filter<T> implements IFilter<T>
+/**
+ * Base filter class that uses an extractor function to extract a filter key (K) from an object of type T and then
+ * lookup the filter element (rule) indicating if objects of this type are enabled.
+ *
+ * @param <T> object type that this filter can process.
+ * @param <K> key type used to lookup filter elements
+ */
+public abstract class Filter<T,K> implements IFilter<T>
 {
-	protected String mName;
-	protected boolean mEnabled = true;
-	
-	public Filter( String name )
-	{
-		mName = name;
-	}
+    private static final Logger LOG = LoggerFactory.getLogger(Filter.class);
+    private String mName;
+    private Map<K, FilterElement<K>> mFilterElementMap = new HashMap<>();
+    private IFilterChangeListener mFilterChangeListener;
 
-	/**
-	 * Indicates if this filter is enabled or disabled
-	 */
-	public boolean isEnabled()
-	{
-		return mEnabled;
-	}
+    /**
+     * Constructs an instance
+     * @param name of this filter
+     */
+    public Filter(String name)
+    {
+        mName = name;
+    }
 
-	/**
-	 * Enables (true) or disables (false) this filter.  An enabled filter will
-	 * evaluate messages and a disabled filter will return false on all message
-	 * test methods.
-	 */
-	public void setEnabled( boolean enabled )
-	{
-		mEnabled = enabled;
-	}
-	
-	/**
-	 * List of filter elements managed by this filter
-	 */
-	public abstract List<FilterElement<?>> getFilterElements();
+    /**
+     * Indicates if this filter contains a filter element matching the key value.
+     * @param key to check
+     * @return true if this filter has a matching filter element.
+     */
+    protected boolean hasKey(K key)
+    {
+        return mFilterElementMap.containsKey(key);
+    }
 
-	/**
-	 * Name of this filter
-	 */
-	public String getName()
-	{
-		return mName;
-	}
-	
-	public void setName( String name )
-	{
-		mName = name;
-	}
-	
-	public String toString()
-	{
-		return mName;
-	}
+    /**
+     * Key extractor function provided by the subclass.
+     * @return key extractor function
+     */
+    public abstract Function<T,K> getKeyExtractor();
+
+    @Override
+    public boolean passes(T t)
+    {
+        K key = getKeyExtractor().apply(t);
+
+        if(mFilterElementMap.containsKey(key))
+        {
+            return mFilterElementMap.get(key).isEnabled();
+        }
+
+        return false;
+    }
+
+    /**
+     * Indicates if this filter can process the item T, meaning that it has a FilterElement that matches the key
+     * value for items of type T.
+     * @param t to test
+     * @return true if this filter can process item t
+     */
+    @Override
+    public boolean canProcess(T t)
+    {
+        return hasKey(getKeyExtractor().apply(t));
+    }
+
+    @Override
+    public boolean isEnabled()
+    {
+        for(FilterElement filterElement: mFilterElementMap.values())
+        {
+            if(filterElement.isEnabled())
+            {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Adds the child filter element to this filter
+     * @param filterElement to add
+     */
+    public void add(FilterElement<K> filterElement)
+    {
+        if(mFilterElementMap.containsKey(filterElement.getElement()))
+        {
+            LOG.warn("Filter element for key [" + filterElement.getElement() + "] named [" + filterElement.getName() +
+                    "] already exists - overwriting existing value");
+        }
+
+        mFilterElementMap.put(filterElement.getElement(), filterElement);
+        filterElement.register(mFilterChangeListener);
+    }
+
+    /**
+     * List of filter elements managed by this filter
+     */
+    public final List<FilterElement<K>> getFilterElements()
+    {
+        return new ArrayList<>(mFilterElementMap.values());
+    }
+
+    /**
+     * Name of this filter
+     */
+    public String getName()
+    {
+        return mName;
+    }
+
+    /**
+     * Sets the name of this filter
+     *
+     * @param name to set
+     */
+    public void setName(String name)
+    {
+        mName = name;
+    }
+
+    /**
+     * Pretty version or name of this filter.
+     *
+     * @return name
+     */
+    public String toString()
+    {
+        return mName;
+    }
+
+    /**
+     * Count of enabled child filter elements.
+     *
+     * @return count
+     */
+    @Override
+    public int getEnabledCount()
+    {
+        int count = 0;
+
+        for(FilterElement filterElement : mFilterElementMap.values())
+        {
+            if(filterElement.isEnabled())
+            {
+                count++;
+            }
+        }
+
+        return count;
+    }
+
+    /**
+     * Count of child filter elements
+     *
+     * @return count
+     */
+    @Override
+    public int getElementCount()
+    {
+        return mFilterElementMap.size();
+    }
+
+    /**
+     * Registers a filter change listener on this filter and all filter elements.
+     * @param listener to be notified of any filter changes.
+     */
+    @Override
+    public void register(IFilterChangeListener listener)
+    {
+        mFilterChangeListener = listener;
+
+        for(FilterElement child: mFilterElementMap.values())
+        {
+            child.register(listener);
+        }
+    }
 }

src/main/java/io/github/dsheirer/filter/FilterEditor.java

@@ -0,0 +1,71 @@
+/*
+ * *****************************************************************************
+ * 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.filter;
+
+import java.awt.Component;
+import net.miginfocom.swing.MigLayout;
+
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JScrollPane;
+
+/**
+ * Filter editor
+ * @param <T> item type for editing
+ */
+public class FilterEditor<T> extends JFrame
+{
+    private FilterEditorPanel<T> mEditorPanel;
+
+    /**
+     * Constructor
+     * @param title for the editor window frame
+     * @param owner to register the popup location
+     * @param filterSet to use initially
+     */
+    public FilterEditor(String title, Component owner, FilterSet<T> filterSet)
+    {
+        if(filterSet == null)
+        {
+            throw new IllegalArgumentException("Unable to construct FilterEditor - FilterSet cannot be null");
+        }
+        setTitle(title);
+        setSize(600, 400);
+        setLocationRelativeTo(owner);
+        setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+        setLayout(new MigLayout("", "[grow,fill]", "[grow,fill][]"));
+        mEditorPanel = new FilterEditorPanel<>(filterSet);
+        JScrollPane scroller = new JScrollPane(mEditorPanel);
+        scroller.setViewportView(mEditorPanel);
+        add(scroller, "wrap");
+        JButton close = new JButton("Close");
+        close.addActionListener(e -> dispose());
+        add(close);
+    }
+
+    /**
+     * Updates this editor with the filterset.
+     * @param filterSet to use in this editor.
+     */
+    public void updateFilterSet(FilterSet<T> filterSet)
+    {
+        mEditorPanel.updateFilterSet(filterSet);
+    }
+}

src/main/java/io/github/dsheirer/filter/FilterEditorPanel.java

@@ -1,100 +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.filter;
 
+import java.awt.Component;
+import java.util.Comparator;
+import java.util.Enumeration;
+import java.util.EventObject;
+import java.util.List;
 import net.miginfocom.swing.MigLayout;
 
 import javax.swing.JCheckBox;
 import javax.swing.JLabel;
-import javax.swing.JMenuItem;
 import javax.swing.JPanel;
-import javax.swing.JPopupMenu;
 import javax.swing.JTree;
-import javax.swing.SwingUtilities;
 import javax.swing.event.CellEditorListener;
 import javax.swing.tree.DefaultMutableTreeNode;
 import javax.swing.tree.DefaultTreeCellRenderer;
 import javax.swing.tree.DefaultTreeModel;
 import javax.swing.tree.TreeCellEditor;
+import javax.swing.tree.TreeNode;
 import javax.swing.tree.TreeSelectionModel;
-import java.awt.Component;
-import java.awt.event.ActionEvent;
-import java.awt.event.ActionListener;
-import java.awt.event.ItemEvent;
-import java.awt.event.ItemListener;
-import java.awt.event.MouseEvent;
-import java.awt.event.MouseListener;
-import java.util.Collections;
-import java.util.Comparator;
-import java.util.Enumeration;
-import java.util.EventObject;
-import java.util.List;
 
+/**
+ * Editor panel for managing the state of a filter set.
+ *
+ * @param <T> element type for the filter set.
+ */
 public class FilterEditorPanel<T> extends JPanel
 {
     private static final long serialVersionUID = 1L;
-
     private JTree mTree;
     private DefaultTreeModel mModel;
     private FilterSet<T> mFilterSet;
 
+    /**
+     * Constructs an instance
+     * @param filterSet to manage
+     */
     public FilterEditorPanel(FilterSet<T> filterSet)
     {
         setLayout(new MigLayout("insets 0 0 0 0", "[grow,fill]", "[grow,fill]"));
-
         mFilterSet = filterSet;
-
         init();
     }
 
+    /**
+     * Initializes the panel and the tree model.
+     */
     private void init()
     {
         DefaultMutableTreeNode root = new DefaultMutableTreeNode(mFilterSet);
-
         mModel = new DefaultTreeModel(root);
-
         addFilterSet(mFilterSet, root);
 
         mTree = new JTree(mModel);
         mTree.setShowsRootHandles(true);
-
-        mTree.addMouseListener(new MouseHandler());
-
-        mTree.getSelectionModel().setSelectionMode(
-                TreeSelectionModel.SINGLE_TREE_SELECTION);
-
+        mTree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
         mTree.setCellRenderer(new EditorTreeCellRenderer());
-
-        mTree.setCellEditor(new FilterTreeNodeEditor());
-
+        mTree.setCellEditor(new FilterTreeCellEditor());
         mTree.setEditable(true);
-
         add(mTree);
     }
 
+    /**
+     * Updates the filter set for this editor panel
+     * @param filterSet to use
+     */
+    public void updateFilterSet(FilterSet<T> filterSet)
+    {
+        remove(mTree);
+        mFilterSet = filterSet;
+        init();
+        revalidate();
+    }
+
+    /**
+     * Adds the filter set as a child tree node to the parent.
+     * @param filterSet to add to the tree
+     * @param parent node for the filter set child tree node.
+     */
     private void addFilterSet(FilterSet<T> filterSet, DefaultMutableTreeNode parent)
     {
         List<IFilter<T>> filters = filterSet.getFilters();
 
-        /* sort the filters in alphabetical order by name */
-        filters.sort(Comparator.comparing(IFilter::getName));
-
         for(IFilter<T> filter : filters)
         {
-            DefaultMutableTreeNode child = new DefaultMutableTreeNode(filter);
+            DefaultMutableTreeNode childNode = new DefaultMutableTreeNode(filter);
+            mModel.insertNodeInto(childNode, parent, parent.getChildCount());
 
-            mModel.insertNodeInto(child, parent, parent.getChildCount());
-
-            if(filter instanceof FilterSet)
+            if(filter instanceof FilterSet childFilterSet)
             {
-                addFilterSet((FilterSet<T>) filter, child);
+                addFilterSet(childFilterSet, childNode);
             }
-            else if(filter instanceof Filter)
+            else if(filter instanceof Filter childFilter)
             {
-                addFilter((Filter<T>) filter, child);
+                addFilter(childFilter, childNode);
             }
         }
     }
 
-    private void addFilter(Filter<T> filter, DefaultMutableTreeNode parent)
+    /**
+     * Adds the filter as a child tree node to the parent.
+     *
+     * @param filter to add
+     * @param parent tree node
+     */
+    private void addFilter(Filter filter, DefaultMutableTreeNode parent)
     {
         List<FilterElement<?>> elements = filter.getFilterElements();
 
@@ -103,123 +131,39 @@ public class FilterEditorPanel<T> extends JPanel
         for(FilterElement<?> element : elements)
         {
             DefaultMutableTreeNode child = new DefaultMutableTreeNode(element);
-
             mModel.insertNodeInto(child, parent, parent.getChildCount());
         }
     }
 
-    public class MouseHandler implements MouseListener
+    /**
+     * Accesses the tree's root tree node.
+     * @return root node.
+     */
+    private DefaultMutableTreeNode getRoot()
     {
-        public MouseHandler()
+        if(mTree.getModel().getRoot() instanceof DefaultMutableTreeNode root)
         {
+            return root;
         }
 
-        @Override
-        public void mouseClicked(MouseEvent event)
-        {
-            if(SwingUtilities.isRightMouseButton(event))
-            {
-                int row = mTree.getRowForLocation(event.getX(),
-                        event.getY());
-
-                if(row != -1)
-                {
-                    mTree.setSelectionRow(row);
-
-                    Object selectedNode =
-                            mTree.getLastSelectedPathComponent();
-
-                    if(selectedNode instanceof DefaultMutableTreeNode)
-                    {
-                        final DefaultMutableTreeNode node =
-                                (DefaultMutableTreeNode) selectedNode;
-
-                        if(node.getChildCount() > 0)
-                        {
-                            JPopupMenu selectionMenu = new JPopupMenu();
-
-                            JMenuItem selectAll = new JMenuItem("Select All");
-                            selectAll.addActionListener(new ActionListener()
-                            {
-                                @Override
-                                public void actionPerformed(ActionEvent arg0)
-                                {
-                                    setFilterEnabled(mModel, node, true);
-                                }
-                            });
-
-                            selectionMenu.add(selectAll);
-
-                            JMenuItem deselectAll = new JMenuItem("Deselect All");
-                            deselectAll.addActionListener(new ActionListener()
-                            {
-                                @Override
-                                public void actionPerformed(ActionEvent arg0)
-                                {
-                                    setFilterEnabled(mModel, node, false);
-                                }
-                            });
-
-                            selectionMenu.add(deselectAll);
-
-                            selectionMenu.show(mTree,
-                                    event.getX(),
-                                    event.getY());
-                        }
-                    }
-                }
-            }
-        }
-
-        @Override
-        public void mousePressed(MouseEvent e)
-        {
-        }
-
-        @Override
-        public void mouseReleased(MouseEvent e)
-        {
-        }
-
-        @Override
-        public void mouseEntered(MouseEvent e)
-        {
-        }
-
-        @Override
-        public void mouseExited(MouseEvent e)
-        {
-        }
+        return null;
     }
 
     /**
-     * Recursively sets the enabled state on all filter node children below the
-     * specified parent node.
+     * Recursively sets the enabled state on all filter node children below the specified parent node.
      *
      * @param model - model containing the tree nodes
      * @param node - parent node
      * @param enabled - true or false to enable or disable the filters
      */
-    private void setFilterEnabled(DefaultTreeModel model,
-                                  DefaultMutableTreeNode node,
-                                  boolean enabled)
+    private void setFilterEnabled(DefaultTreeModel model, DefaultMutableTreeNode node, boolean enabled)
     {
         Object obj = node.getUserObject();
 
-        if(obj instanceof FilterSet<?>)
+        if(obj instanceof FilterElement filterElement)
         {
-            ((FilterSet<?>) obj).setEnabled(enabled);
+            filterElement.setEnabled(enabled);
         }
-        else if(obj instanceof Filter)
-        {
-            ((Filter<?>) obj).setEnabled(enabled);
-        }
-        else if(obj instanceof FilterElement)
-        {
-            ((FilterElement<?>) obj).setEnabled(enabled);
-        }
-
-        model.nodeChanged(node);
 
         /* Recursively set the children of this node */
         Enumeration<?> children = node.children();
@@ -228,43 +172,123 @@ public class FilterEditorPanel<T> extends JPanel
         {
             Object child = children.nextElement();
 
-            if(child instanceof DefaultMutableTreeNode)
+            if(child instanceof DefaultMutableTreeNode childNode)
             {
-                setFilterEnabled(model, (DefaultMutableTreeNode) child, enabled);
+                setFilterEnabled(model, childNode, enabled);
             }
         }
+
+        model.nodeChanged(node);
+    }
+
+    /**
+     * Recursively searches the tree to find the tree node containing the specified filter element.
+     *
+     * @param node to start search
+     * @param element to find
+     */
+    private DefaultMutableTreeNode findFilterElementNode(DefaultMutableTreeNode node, FilterElement<?> element)
+    {
+        if(node != null)
+        {
+            if(node.getUserObject() instanceof FilterElement<?> selfFilterElement && selfFilterElement.equals(element))
+            {
+                return node;
+            }
+
+            for(int x = 0; x < node.getChildCount(); x++)
+            {
+                if(node.getChildAt(x) instanceof DefaultMutableTreeNode child)
+                {
+                    DefaultMutableTreeNode found = findFilterElementNode(child, element);
+
+                    if(found != null)
+                    {
+                        return found;
+                    }
+                }
+            }
+        }
+
+        return null;
+    }
+
+    /**
+     * Updates the display value for the specified node and all parents in the nodes parentage.
+     * @param node to update
+     */
+    private void updateParentage(DefaultMutableTreeNode node)
+    {
+        mModel.nodeChanged(node);
+
+        TreeNode parent = node.getParent();
+
+        while(parent != null)
+        {
+            mModel.nodeChanged(parent);
+            parent = parent.getParent();
+        }
     }
 
+    /**
+     * Recursively searches the tree to find the tree node containing the specified filter.
+     *
+     * @param node to start search
+     * @param filter to find
+     */
+    private DefaultMutableTreeNode findFilterNode(DefaultMutableTreeNode node, IFilter<?> filter)
+    {
+        if(node != null)
+        {
+            if(node.getUserObject() instanceof IFilter<?> selfFilter && selfFilter.equals(filter))
+            {
+                return node;
+            }
+
+            for(int x = 0; x < node.getChildCount(); x++)
+            {
+                if(node.getChildAt(x) instanceof DefaultMutableTreeNode child)
+                {
+                    DefaultMutableTreeNode found = findFilterNode(child, filter);
+
+                    if(found != null)
+                    {
+                        return found;
+                    }
+                }
+            }
+        }
+        else
+        {
+            System.out.println("Can't evaluate - node is null");
+        }
+
+        return null;
+    }
+
+    /**
+     * Custom cell renderer
+     */
     public class EditorTreeCellRenderer extends DefaultTreeCellRenderer
     {
         private static final long serialVersionUID = 1L;
 
-        public Component getTreeCellRendererComponent(JTree tree,
-                                                      Object treeNode,
-                                                      boolean selected,
-                                                      boolean expanded,
-                                                      boolean leaf,
-                                                      int row,
-                                                      boolean hasFocus)
+        public Component getTreeCellRendererComponent(JTree tree, Object treeNode, boolean selected, boolean expanded,
+                                                      boolean leaf, int row, boolean hasFocus)
         {
             if(treeNode instanceof DefaultMutableTreeNode)
             {
                 Object userObject = ((DefaultMutableTreeNode) treeNode).getUserObject();
-
                 JCheckBox checkBox = null;
 
-                if(userObject instanceof IFilter)
+                if(userObject instanceof IFilter filter)
                 {
-                    IFilter<?> filter = (IFilter<?>) userObject;
-
-                    checkBox = new JCheckBox(filter.getName());
+                    checkBox = new FilterCheckBox(filter);
                     checkBox.setSelected(filter.isEnabled());
                 }
-                else if(userObject instanceof FilterElement)
+                else if(userObject instanceof FilterElement element)
                 {
-                    FilterElement<?> element = (FilterElement<?>) userObject;
-
-                    checkBox = new JCheckBox(element.getName());
+                    checkBox = new FilterElementCheckBox(element);
                     checkBox.setSelected(element.isEnabled());
                 }
 
@@ -285,95 +309,110 @@ public class FilterEditorPanel<T> extends JPanel
                 }
             }
 
-            return super.getTreeCellRendererComponent(tree, treeNode, selected,
-                    expanded, leaf, row, hasFocus);
+            return super.getTreeCellRendererComponent(tree, treeNode, selected, expanded, leaf, row, hasFocus);
         }
     }
 
+    /**
+     * Check box used in filter tree nodes
+     */
     public class FilterCheckBox extends JCheckBox
     {
         private static final long serialVersionUID = 1L;
+        private IFilter<?> mFilter;
 
-        private IFilter<T> mFilter;
-
-        public FilterCheckBox(IFilter<T> filter)
+        /**
+         * Constructs an instance
+         *
+         * @param filter
+         */
+        public FilterCheckBox(IFilter<?> filter)
         {
-            super(filter.getName());
-
             mFilter = filter;
-
             setSelected(mFilter.isEnabled());
+            addItemListener(e -> {
+                DefaultMutableTreeNode selfNode = findFilterNode(getRoot(), mFilter);
 
-            addItemListener(new ItemListener()
-            {
-                @Override
-                public void itemStateChanged(ItemEvent e)
+                if(selfNode != null)
                 {
-                    mFilter.setEnabled(FilterCheckBox.this.isSelected());
+                    setFilterEnabled(mModel, selfNode, FilterCheckBox.this.isSelected());
+                    updateLabel();
+                    updateParentage(selfNode);
                 }
             });
         }
+
+        @Override
+        public void setSelected(boolean b)
+        {
+            super.setSelected(b);
+            updateLabel();
+        }
+
+        public void updateLabel()
+        {
+            setText(mFilter.getName() + " (" + mFilter.getEnabledCount() + "/" + mFilter.getElementCount() + ")");
+        }
     }
 
+    /**
+     * Check box used in filter element tree nodes
+     */
     public class FilterElementCheckBox extends JCheckBox
     {
         private static final long serialVersionUID = 1L;
-
         private FilterElement<?> mFilter;
 
+        /**
+         * Constructs an instance
+         *
+         * @param filter element
+         */
         public FilterElementCheckBox(FilterElement<?> filter)
         {
             super(filter.getName());
-
             mFilter = filter;
-
             setSelected(mFilter.isEnabled());
-
-            addItemListener(new ItemListener()
-            {
-                @Override
-                public void itemStateChanged(ItemEvent arg0)
+            addItemListener(arg0 -> {
+                mFilter.setEnabled(FilterElementCheckBox.this.isSelected());
+                DefaultMutableTreeNode self = findFilterElementNode(getRoot(), mFilter);
+                if(self != null)
                 {
-                    mFilter.setEnabled(FilterElementCheckBox.this.isSelected());
+                    updateParentage(self);
                 }
             });
         }
     }
 
-    public class FilterTreeNodeEditor implements TreeCellEditor
+    /**
+     * Editor for filter tree nodes
+     */
+    public class FilterTreeCellEditor implements TreeCellEditor
     {
         @Override
-        @SuppressWarnings({"rawtypes", "unchecked"})
-        public Component getTreeCellEditorComponent(JTree tree, Object node,
-                                                    boolean isSelected, boolean expanded, boolean leaf, int row)
+        public Component getTreeCellEditorComponent(JTree tree, Object node, boolean isSelected, boolean expanded, boolean leaf, int row)
         {
-            if(node instanceof DefaultMutableTreeNode)
+            if(node instanceof DefaultMutableTreeNode mutableTreeNode)
             {
-                Object userObject = ((DefaultMutableTreeNode) node).getUserObject();
+                Object userObject = mutableTreeNode.getUserObject();
 
-                if(userObject instanceof IFilter)
+                if(userObject instanceof IFilter filter)
                 {
-                    return new FilterCheckBox((IFilter) userObject);
+                    return new FilterCheckBox(filter);
                 }
-                else if(userObject instanceof FilterElement)
+                else if(userObject instanceof FilterElement filterElement)
                 {
-                    return new FilterElementCheckBox((FilterElement<?>) userObject);
+                    return new FilterElementCheckBox(filterElement);
                 }
             }
-
             return new JLabel(node.toString());
         }
 
         @Override
-        public void addCellEditorListener(CellEditorListener l)
-        {
-        }
+        public void addCellEditorListener(CellEditorListener l) {}
 
         @Override
-        public void cancelCellEditing()
-        {
-
-        }
+        public void cancelCellEditing() {}
 
         @Override
         public Object getCellEditorValue()
@@ -388,9 +427,7 @@ public class FilterEditorPanel<T> extends JPanel
         }
 
         @Override
-        public void removeCellEditorListener(CellEditorListener l)
-        {
-        }
+        public void removeCellEditorListener(CellEditorListener l) {}
 
         @Override
         public boolean shouldSelectCell(EventObject anEvent)

src/main/java/io/github/dsheirer/filter/FilterElement.java

@@ -1,55 +1,148 @@
+/*
+ * *****************************************************************************
+ * 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.filter;
 
+/**
+ * Filter element provides filtering and enabled state tracking for an individual filterable element.
+ *
+ * @param <T> element to track and filter.
+ */
 public class FilterElement<T> implements Comparable<FilterElement<T>>
 {
-	private boolean mEnabled;
-	private T mElement;
-	
-	public FilterElement( T element, boolean enabled )
-	{
-		mElement = element;
-		mEnabled = enabled;
-	}
-	
-	public FilterElement( T t )
-	{
-		this( t, true );
-	}
-	
-	public T getElement()
-	{
-		return mElement;
-	}
-	
-	public String toString()
-	{
-		return getName();
-	}
-	
-	public boolean isEnabled()
-	{
-		return mEnabled;
-	}
-	
-	public void setEnabled( boolean enabled )
-	{
-		mEnabled = enabled;
-	}
-	
-	public String getName()
-	{
-		return mElement.toString();
-	}
+    private boolean mEnabled;
+    private final T mElement;
+    private IFilterChangeListener mFilterChangeListener;
 
-	@Override
-    public int compareTo( FilterElement<T> other )
+    /**
+     * Constructs an instance
+     *
+     * @param element to track
+     * @param enabled enabled state of this filter element
+     */
+    public FilterElement(T element, boolean enabled)
     {
-	    return toString().compareTo( other.toString() );
+        mElement = element;
+        mEnabled = enabled;
     }
 
+    /**
+     * Constructs an instance with a default state of enabled (true).
+     *
+     * @param t element to track
+     */
+    public FilterElement(T t)
+    {
+        this(t, true);
+    }
+
+    /**
+     * Registers the listener with each child filter element.
+     *
+     * @param listener to register
+     */
+    public void register(IFilterChangeListener listener)
+    {
+        mFilterChangeListener = listener;
+    }
+
+    /**
+     * Element being filtered.
+     *
+     * @return element
+     */
+    public T getElement()
+    {
+        return mElement;
+    }
+
+    /**
+     * Name or display string for the element.
+     *
+     * @return string version of the element.
+     */
+    public String toString()
+    {
+        return getName();
+    }
+
+    /**
+     * Indicates if this filter is enabled indicating that elements of this type will pass this filter.
+     *
+     * @return enabled state.
+     */
+    public boolean isEnabled()
+    {
+        return mEnabled;
+    }
+
+    /**
+     * Sets the enabled state of this filter.
+     *
+     * @param enabled true to allow this filter's element type to pass the filter.
+     */
+    public void setEnabled(boolean enabled)
+    {
+        mEnabled = enabled;
+
+        if(mFilterChangeListener != null)
+        {
+            mFilterChangeListener.filterChanged();
+        }
+    }
+
+    /**
+     * Name of the tracked element.
+     *
+     * @return name
+     */
+    public String getName()
+    {
+        return mElement.toString();
+    }
+
+    /**
+     * Implements compareto interface for ordering of filter elements.
+     *
+     * @param other the object to be compared.
+     * @return comparison value
+     */
     @Override
-    public boolean equals(Object o) {
-        if (!(o instanceof FilterElement)) return false;
-        return compareTo((FilterElement) o) == 0;
+    public int compareTo(FilterElement<T> other)
+    {
+        return toString().compareTo(other.toString());
+    }
+
+    /**
+     * Implement equals interface for comparison of filter elements.
+     *
+     * @param o to compare
+     * @return comparison
+     */
+    @Override
+    public boolean equals(Object o)
+    {
+        if(o instanceof FilterElement fe)
+        {
+            return compareTo(fe) == 0;
+        }
+
+        return false;
     }
 }

src/main/java/io/github/dsheirer/filter/FilterSet.java

@@ -1,108 +1,239 @@
+/*
+ * *****************************************************************************
+ * 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.filter;
 
+import io.github.dsheirer.log.LoggingSuppressor;
 import java.util.ArrayList;
 import java.util.List;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
+/**
+ * Filter set is a parent container for filters.
+ *
+ * @param <T> type of element tracked/filtered by this filter set.
+ */
 public class FilterSet<T> implements IFilter<T>
 {
-    protected List<IFilter<T>> mFilters = new ArrayList<IFilter<T>>();
-    protected boolean mEnabled = true;
-    protected String mName;
+	private static final Logger LOGGER = LoggerFactory.getLogger(FilterSet.class);
+	private static LoggingSuppressor sLoggingSuppressor = new LoggingSuppressor(LOGGER);
+	private List<IFilter<T>> mFilters = new ArrayList<>();
+	private String mName;
+	private IFilterChangeListener mFilterChangeListener;
 
-    public FilterSet( String name )
-    {
-    	mName = name;
-    }
-    
-    public FilterSet()
-    {
-    	mName = "Message Filter";
-    }
-
-    public FilterSet(IFilter<T> filter)
+	/**
+	 * Constructs an instance of a filter set.
+	 *
+	 * @param name of this filter set.
+	 */
+	public FilterSet(String name)
 	{
+		mName = name;
+	}
+
+	/**
+	 * Constructs an instance with a single filter using the default 'Filters' name.
+	 *
+	 * @param filter for this filter set.
+	 */
+	public FilterSet(IFilter<T> filter)
+	{
+		this("Filters");
 		addFilter(filter);
 	}
-    
-    public String getName()
-    {
-    	return mName;
-    }
-    
-    public void setName( String name )
-    {
-    	mName = name;
-    }
-    
-    public String toString()
-    {
-    	return getName();
-    }
-    
-	@Override
-    public boolean passes( T t )
-    {
-		if( mEnabled )
-		{
-			for( IFilter<T> filter: mFilters )
-			{
-				// Make sure to loop through all filters.
-				// Only return if true or all filters have been evaluated.
-				if( filter.canProcess( t ) && filter.passes( t ))
-				{
-					return true;
-				}
-			}
-		}
-		return false;
-    }
 
-	@Override
-    public boolean canProcess( T t )
-    {
-		if( mEnabled )
+	/**
+	 * Registers the listener with each child filter element.
+	 * @param listener to register
+	 */
+	public void register(IFilterChangeListener listener)
+	{
+		mFilterChangeListener = listener;
+
+		for(IFilter child: mFilters)
 		{
-			for( IFilter<T> filter: mFilters )
+			child.register(listener);
+		}
+	}
+
+	/**
+	 * Name of this filter set.
+	 *
+	 * @return name
+	 */
+	public String getName()
+	{
+		return mName;
+	}
+
+	/**
+	 * Sets the name of this filter set.
+	 *
+	 * @param name to set
+	 */
+	public void setName(String name)
+	{
+		mName = name;
+	}
+
+	/**
+	 * Name for this filter set.
+	 *
+	 * @return name
+	 */
+	public String toString()
+	{
+		return getName();
+	}
+
+	/**
+	 * Indicates if the element passes at least one of the child filters in this filter set.
+	 *
+	 * @param t to evaluate
+	 * @return true if the argument passes a child filter.
+	 */
+	@Override
+	public boolean passes(T t)
+	{
+		for(IFilter<T> filter : mFilters)
+		{
+			//Stop at the first filter that says that it can process the message type.
+			if(filter.canProcess(t))
 			{
-				if( filter.canProcess( t ) )
-				{
-					return true;
-				}
+				return filter.passes(t);
 			}
 		}
-		
+
 		return false;
-    }
-	
+	}
+
+	/**
+	 * Indicates if this filter set contains at least one filter that can evaluate the type of argument that is presented.
+	 *
+	 * @param t element to evaluate
+	 * @return true if this filter set can evaluate objects of the argument's type.
+	 */
+	@Override
+	public boolean canProcess(T t)
+	{
+		for(IFilter<T> filter : mFilters)
+		{
+			if(filter.canProcess(t))
+			{
+				return true;
+			}
+		}
+
+		sLoggingSuppressor.info(t.getClass().getSimpleName(), 1, "FilterSet [" +
+			this.getClass().getSimpleName() + "] has no filter element for items of type [" +
+				t.getClass().getSimpleName() + "]");
+
+		return false;
+	}
+
+	/**
+	 * Child filters
+	 *
+	 * @return filters
+	 */
 	public List<IFilter<T>> getFilters()
 	{
-		return mFilters;
-	}
-	
-	public void addFilters( List<IFilter<T>> filters )
-	{
-		mFilters.addAll( filters );
-	}
-	
-	public void addFilter( IFilter<T> filter )
-	{
-		mFilters.add( filter );
-	}
-	
-	public void removeFilter( IFilter<T> filter )
-	{
-		mFilters.remove( filter );
+		return new ArrayList<>(mFilters);
 	}
 
-	@Override
-    public boolean isEnabled()
-    {
-	    return mEnabled;
-    }
+	/**
+	 * Adds a list of child filters to this filter set.
+	 * @param filters to add
+	 */
+	public void addFilters(List<IFilter<T>> filters)
+	{
+		for(IFilter<T> filter: filters)
+		{
+			addFilter(filter);
+		}
+	}
 
+	/**
+	 * Adds the child filter to this filter set.
+	 * @param filter to add
+	 */
+	public void addFilter(IFilter<T> filter)
+	{
+		if(filter instanceof Filter<?,?> filterInstance && filterInstance.getKeyExtractor() == null)
+		{
+			LOGGER.warn("Filter [" + filter.getClass() + "] has a null key extractor");
+		}
+
+		mFilters.add(filter);
+		filter.register(mFilterChangeListener);
+	}
+
+	/**
+	 * Indicates if any of the child filters contain at least one filter element that is enabled.
+	 * @return enabled state
+	 */
 	@Override
-    public void setEnabled( boolean enabled )
-    {
-		mEnabled = enabled;
-    }
+	public boolean isEnabled()
+	{
+		for(IFilter filter: mFilters)
+		{
+			if(filter.isEnabled())
+			{
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	 * Recursive count of enabled child filter elements.
+	 * @return count
+	 */
+	@Override
+	public int getEnabledCount()
+	{
+		int count = 0;
+
+		for(IFilter filter: mFilters)
+		{
+			count += filter.getEnabledCount();
+		}
+
+		return count;
+	}
+
+	/**
+	 * Recursive count of child filter elements.
+	 * @return count
+	 */
+	@Override
+	public int getElementCount()
+	{
+		int count = 0;
+
+		for(IFilter filter: mFilters)
+		{
+			count += filter.getElementCount();
+		}
+
+		return count;
+	}
 }

src/main/java/io/github/dsheirer/filter/IFilter.java

@@ -1,36 +1,75 @@
+/*
+ * *****************************************************************************
+ * 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.filter;
 
+/**
+ * Filter interface
+ *
+ * @param <T> type of filter
+ */
 public interface IFilter<T>
 {
-	/**
-	 * Generic filter method.
-	 * 
-	 * @param message - message to filter
-	 * @return - true if the message passes the filter
-	 */
-	public boolean passes( T t );
+    /**
+     * Generic filter method.
+     *
+     * @param t - message to filter
+     * @return - true if the message passes the filter
+     */
+    boolean passes(T t);
 
-	/**
-	 * Indicates if the filter can process (filter) the object
-	 * 
-	 * @param message - candidate message for filtering
-	 * 
-	 * @return - true if the filter is capable of filtering the message
-	 */
-	public boolean canProcess( T t );
+    /**
+     * Indicates if the filter can process (filter) the object
+     *
+     * @param t - candidate message for filtering
+     * @return - true if the filter is capable of filtering the message
+     */
+    boolean canProcess(T t);
 
-	/**
-	 * Indicates if this filter is enabled to evaluate messages
-	 */
-	public boolean isEnabled();
+    /**
+     * Indicates if this filter is enabled to evaluate messages
+     */
+    boolean isEnabled();
 
-	/**
-	 * Sets the enabled state of the filter
-	 */
-	public void setEnabled( boolean enabled );
-	
-	/**
-	 * Display name for the filter
-	 */
-	public String getName();
+    /**
+     * Display name for the filter
+     */
+    String getName();
+
+    /**
+     * (Recursive) count of enabled child filter elements.
+     *
+     * @return total enable count.
+     */
+    int getEnabledCount();
+
+    /**
+     * (Recursive) count of total child filter elements.
+     *
+     * @return total count of child filter elements.
+     */
+    int getElementCount();
+
+    /**
+     * Registers the listener to be notified when the enabled state of any child filter elements is updated.
+     *
+     * @param listener to be notified
+     */
+    void register(IFilterChangeListener listener);
 }

src/main/java/io/github/dsheirer/filter/IFilterChangeListener.java

@@ -0,0 +1,25 @@
+/*
+ * *****************************************************************************
+ * 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.filter;
+
+public interface IFilterChangeListener
+{
+    void filterChanged();
+}

src/main/java/io/github/dsheirer/filter/SyncLossMessageFilter.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
@@ -15,30 +14,36 @@
  *
  * 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.module.decode.p25.phase1.message.filter;
+package io.github.dsheirer.filter;
 
-import io.github.dsheirer.filter.Filter;
-import io.github.dsheirer.filter.FilterElement;
 import io.github.dsheirer.message.IMessage;
 import io.github.dsheirer.message.SyncLossMessage;
+import java.util.function.Function;
 
-import java.util.Collections;
-import java.util.List;
-
-public class SyncLossMessageFilter extends Filter<IMessage>
+/**
+ * Filter for sync-loss messages
+ */
+public class SyncLossMessageFilter extends Filter<IMessage,String>
 {
+    private static final String SYNC_LOSS_KEY = "Sync-Loss";
+    private KeyExtractor mKeyExtractor = new KeyExtractor();
+
+    /**
+     * Constructor
+     */
     public SyncLossMessageFilter()
     {
-        super("Sync Loss");
+        super("Sync Loss Messages");
+        add(new FilterElement<>(SYNC_LOSS_KEY));
     }
 
     @Override
-    public boolean passes(IMessage message)
+    public Function<IMessage, String> getKeyExtractor()
     {
-        return mEnabled && canProcess(message);
+        return mKeyExtractor;
     }
 
     @Override
@@ -47,9 +52,20 @@ public class SyncLossMessageFilter extends Filter<IMessage>
         return message instanceof SyncLossMessage;
     }
 
-    @Override
-    public List<FilterElement<?>> getFilterElements()
+    /**
+     * Key extractor
+     */
+    private class KeyExtractor implements Function<IMessage,String>
     {
-        return Collections.EMPTY_LIST;
+        @Override
+        public String apply(IMessage message)
+        {
+            if(message instanceof SyncLossMessage)
+            {
+                return SYNC_LOSS_KEY;
+            }
+
+            return null;
+        }
     }
 }

src/main/java/io/github/dsheirer/gui/instrument/chart/LTRNetSampleBufferChart.java

@@ -1,18 +1,21 @@
-/*******************************************************************************
- * 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.gui.instrument.chart;
 
 import io.github.dsheirer.module.decode.ltrnet.LTRNetDecoderInstrumented;
@@ -58,7 +61,7 @@ public class LTRNetSampleBufferChart extends LineChart
 
         mLTRNetDecoderInstrumented = decoder;
         decoder.bufferCount.addListener(new BufferChangeListener());
-        decoder.getLTRDecoder().getErrorDetector().timingError.addListener(new ErrorChangeListener());
+//        decoder.getLTRDecoder().getErrorDetector().timingError.addListener(new ErrorChangeListener());
     }
 
     public void setBuffer(boolean[] buffer)
@@ -89,7 +92,7 @@ public class LTRNetSampleBufferChart extends LineChart
         @Override
         public void changed(ObservableValue observable, Object oldValue, Object newValue)
         {
-            setBuffer(mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getDelayLine());
+//            setBuffer(mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getDelayLine());
 
             while(mSymbol.size() < 2)
             {
@@ -115,29 +118,29 @@ public class LTRNetSampleBufferChart extends LineChart
                 mSymbolSamples.add(sample);
             }
 
-            int pointer1 = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getDelayLinePointer();
-            int pointer2 = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getDelayLineSecondPointer();
+//            int pointer1 = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getDelayLinePointer();
+//            int pointer2 = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getDelayLineSecondPointer();
 
-            mSamplePoints.get(0).setXValue(pointer1);
-            mSamplePoints.get(1).setXValue(pointer2);
+//            mSamplePoints.get(0).setXValue(pointer1);
+//            mSamplePoints.get(1).setXValue(pointer2);
 
-            float samplesRemaining = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getMidSymbolSamplingPoint();
-            float samplesPerSymbol = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getSamplesPerSymbol();
+//            float samplesRemaining = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getMidSymbolSamplingPoint();
+//            float samplesPerSymbol = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getSamplesPerSymbol();
 
-            float start = pointer1 + samplesRemaining;
-            float end = start + samplesPerSymbol;
+//            float start = pointer1 + samplesRemaining;
+//            float end = start + samplesPerSymbol;
 
-            mSymbolSamples.get(0).setXValue(start);
-            mSymbolSamples.get(1).setXValue(end);
+//            mSymbolSamples.get(0).setXValue(start);
+//            mSymbolSamples.get(1).setXValue(end);
 
-            boolean symbol = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getLastSymbol();
-            int symbolStart = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getSymbolStart();
-            int symbolEnd = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getSymbolEnd();
+//            boolean symbol = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getLastSymbol();
+//            int symbolStart = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getSymbolStart();
+//            int symbolEnd = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getSymbolEnd();
 
-            mSymbol.get(0).setXValue(symbolStart);
-            mSymbol.get(0).setYValue(symbol ? 0.55f : -0.55f);
-            mSymbol.get(1).setXValue(symbolEnd);
-            mSymbol.get(1).setYValue(symbol ? 0.55f : -0.55f);
+//            mSymbol.get(0).setXValue(symbolStart);
+//            mSymbol.get(0).setYValue(symbol ? 0.55f : -0.55f);
+//            mSymbol.get(1).setXValue(symbolEnd);
+//            mSymbol.get(1).setYValue(symbol ? 0.55f : -0.55f);
         }
     }
 
@@ -152,20 +155,20 @@ public class LTRNetSampleBufferChart extends LineChart
                 mZeroCrossing.add(sample);
             }
 
-            int pointer1 = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getDelayLinePointer();
-            int pointer2 = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getDelayLineSecondPointer();
+//            int pointer1 = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getDelayLinePointer();
+//            int pointer2 = mLTRNetDecoderInstrumented.getLTRDecoder().getSampleBuffer().getDelayLineSecondPointer();
 
-            float zeroCrossingIdeal = mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getZeroCrossingIdeal();
-            float detectedZeroCrossing = zeroCrossingIdeal - ((Number)newValue).floatValue();
-
-            int reference = (zeroCrossingIdeal < pointer1 || detectedZeroCrossing < pointer1 ? pointer2 : pointer1);
-            reference--;
-
-            float start = reference - zeroCrossingIdeal;
-            float end = reference - detectedZeroCrossing;
-
-            mZeroCrossing.get(0).setXValue(start);
-            mZeroCrossing.get(1).setXValue(end);
+//            float zeroCrossingIdeal = mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getZeroCrossingIdeal();
+//            float detectedZeroCrossing = zeroCrossingIdeal - ((Number)newValue).floatValue();
+//
+//            int reference = (zeroCrossingIdeal < pointer1 || detectedZeroCrossing < pointer1 ? pointer2 : pointer1);
+//            reference--;
+//
+//            float start = reference - zeroCrossingIdeal;
+//            float end = reference - detectedZeroCrossing;
+//
+//            mZeroCrossing.get(0).setXValue(start);
+//            mZeroCrossing.get(1).setXValue(end);
         }
     }
 }

src/main/java/io/github/dsheirer/gui/instrument/chart/ZeroCrossingErrorDetectorChart.java

@@ -1,18 +1,21 @@
-/*******************************************************************************
- * 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.gui.instrument.chart;
 
 import io.github.dsheirer.module.decode.ltrnet.LTRNetDecoderInstrumented;
@@ -53,7 +56,7 @@ public class ZeroCrossingErrorDetectorChart extends LineChart
         setData(observableList);
 
         mLTRNetDecoderInstrumented = decoder;
-        decoder.getLTRDecoder().getErrorDetector().timingError.addListener(new ErrorChangeListener());
+//        decoder.getLTRDecoder().getErrorDetector().timingError.addListener(new ErrorChangeListener());
         decoder.bufferCount.addListener(new ChangeListener()
         {
             @Override
@@ -84,13 +87,13 @@ public class ZeroCrossingErrorDetectorChart extends LineChart
 
     private void updateBuffer()
     {
-        boolean[] samples = mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getBuffer();
-
-        for(int x = 0; x < samples.length; x++)
-        {
-            Data<Number,Number> sample = mCurrentSamples.get(x);
-            sample.setYValue(samples[x] ? 0.7f : 0.3f);
-        }
+//        boolean[] samples = mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getBuffer();
+//
+//        for(int x = 0; x < samples.length; x++)
+//        {
+//            Data<Number,Number> sample = mCurrentSamples.get(x);
+//            sample.setYValue(samples[x] ? 0.7f : 0.3f);
+//        }
     }
 
     public class ErrorChangeListener implements ChangeListener
@@ -98,35 +101,35 @@ public class ZeroCrossingErrorDetectorChart extends LineChart
         @Override
         public void changed(ObservableValue observable, Object oldValue, Object newValue)
         {
-            float error = mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getError();
-
-            boolean[] samples = mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getBuffer();
-
-            for(int x = 0; x < samples.length; x++)
-            {
-                Data<Number,Number> sample = mPreviousSamples.get(x);
-                sample.setYValue(samples[x] ? -0.4f : -0.6f);
-            }
-
-            Data<Number,Number> ideal1 = mIdeal.get(0);
-            ideal1.setXValue(mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getZeroCrossingIdeal());
-            Data<Number,Number> ideal2 = mIdeal.get(1);
-            ideal2.setXValue(mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getZeroCrossingIdeal());
-
-            if(error == 0.0f)
-            {
-                Data<Number,Number> detected1 = mDetected.get(0);
-                detected1.setXValue(0.0f);
-                Data<Number,Number> detected2 = mDetected.get(1);
-                detected2.setXValue(0.0f);
-            }
-            else
-            {
-                Data<Number,Number> detected1 = mDetected.get(0);
-                detected1.setXValue(mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getDetectedZeroCrossing());
-                Data<Number,Number> detected2 = mDetected.get(1);
-                detected2.setXValue(mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getDetectedZeroCrossing());
-            }
+//            float error = mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getError();
+//
+//            boolean[] samples = mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getBuffer();
+//
+//            for(int x = 0; x < samples.length; x++)
+//            {
+//                Data<Number,Number> sample = mPreviousSamples.get(x);
+//                sample.setYValue(samples[x] ? -0.4f : -0.6f);
+//            }
+//
+//            Data<Number,Number> ideal1 = mIdeal.get(0);
+//            ideal1.setXValue(mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getZeroCrossingIdeal());
+//            Data<Number,Number> ideal2 = mIdeal.get(1);
+//            ideal2.setXValue(mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getZeroCrossingIdeal());
+//
+//            if(error == 0.0f)
+//            {
+//                Data<Number,Number> detected1 = mDetected.get(0);
+//                detected1.setXValue(0.0f);
+//                Data<Number,Number> detected2 = mDetected.get(1);
+//                detected2.setXValue(0.0f);
+//            }
+//            else
+//            {
+//                Data<Number,Number> detected1 = mDetected.get(0);
+//                detected1.setXValue(mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getDetectedZeroCrossing());
+//                Data<Number,Number> detected2 = mDetected.get(1);
+//                detected2.setXValue(mLTRNetDecoderInstrumented.getLTRDecoder().getErrorDetector().getDetectedZeroCrossing());
+//            }
         }
     }
 }

src/main/java/io/github/dsheirer/gui/instrument/decoder/LTRNetPane.java

@@ -1,18 +1,21 @@
-/*******************************************************************************
- * 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.gui.instrument.decoder;
 
 import io.github.dsheirer.gui.instrument.chart.LTRNetSampleBufferChart;
@@ -142,8 +145,8 @@ public class LTRNetPane extends RealDecoderPane
     {
         if(mZeroCrossingErrorDetectorChart == null)
         {
-            mZeroCrossingErrorDetectorChart = new ZeroCrossingErrorDetectorChart(getDecoder(),
-                    getDecoder().getLTRDecoder().getErrorDetector().getBuffer().length);
+//            mZeroCrossingErrorDetectorChart = new ZeroCrossingErrorDetectorChart(getDecoder(),
+//                    getDecoder().getLTRDecoder().getErrorDetector().getBuffer().length);
         }
 
         return mZeroCrossingErrorDetectorChart;

src/main/java/io/github/dsheirer/gui/playlist/channel/NBFMConfigurationEditor.java

@@ -27,6 +27,7 @@ import io.github.dsheirer.gui.playlist.eventlog.EventLogConfigurationEditor;
 import io.github.dsheirer.gui.playlist.source.FrequencyEditor;
 import io.github.dsheirer.gui.playlist.source.SourceConfigurationEditor;
 import io.github.dsheirer.module.decode.DecoderType;
+import io.github.dsheirer.module.decode.analog.DecodeConfigAnalog;
 import io.github.dsheirer.module.decode.config.AuxDecodeConfiguration;
 import io.github.dsheirer.module.decode.config.DecodeConfiguration;
 import io.github.dsheirer.module.decode.nbfm.DecodeConfigNBFM;
@@ -40,8 +41,6 @@ import io.github.dsheirer.record.RecorderType;
 import io.github.dsheirer.record.config.RecordConfiguration;
 import io.github.dsheirer.source.config.SourceConfiguration;
 import io.github.dsheirer.source.tuner.manager.TunerManager;
-import java.util.ArrayList;
-import java.util.List;
 import javafx.beans.value.ChangeListener;
 import javafx.beans.value.ObservableValue;
 import javafx.collections.ListChangeListener;
@@ -58,15 +57,15 @@ import javafx.scene.layout.GridPane;
 import javafx.scene.text.TextAlignment;
 import org.controlsfx.control.SegmentedButton;
 import org.controlsfx.control.ToggleSwitch;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+import java.util.List;
 
 /**
  * Narrow-Band FM channel configuration editor
  */
 public class NBFMConfigurationEditor extends ChannelConfigurationEditor
 {
-    private final static Logger mLog = LoggerFactory.getLogger(NBFMConfigurationEditor.class);
     private TitledPane mAuxDecoderPane;
     private TitledPane mDecoderPane;
     private TitledPane mEventLogPane;
@@ -75,8 +74,9 @@ public class NBFMConfigurationEditor extends ChannelConfigurationEditor
     private TextField mTalkgroupField;
     private TextField mSquelchThresholdField;
     private ToggleSwitch mSquelchAutoTrackSwitch;
+    private ToggleSwitch mAudioFilterEnable;
     private TextFormatter<Integer> mTalkgroupTextFormatter;
-    private IntegerFormatter mSquelchTextFormatter = new IntegerFormatter((int)DbPowerMeter.DEFAULT_MINIMUM_POWER,
+    private final IntegerFormatter mSquelchTextFormatter = new IntegerFormatter((int)DbPowerMeter.DEFAULT_MINIMUM_POWER,
             (int)DbPowerMeter.DEFAULT_MAXIMUM_POWER);
     private ToggleSwitch mBasebandRecordSwitch;
     private SegmentedButton mBandwidthButton;
@@ -84,9 +84,9 @@ public class NBFMConfigurationEditor extends ChannelConfigurationEditor
     private SourceConfigurationEditor mSourceConfigurationEditor;
     private AuxDecoderConfigurationEditor mAuxDecoderConfigurationEditor;
     private EventLogConfigurationEditor mEventLogConfigurationEditor;
-    private TalkgroupValueChangeListener mTalkgroupValueChangeListener = new TalkgroupValueChangeListener();
-    private IntegerFormatter mDecimalFormatter = new IntegerFormatter(1, 65535);
-    private HexFormatter mHexFormatter = new HexFormatter(1, 65535);
+    private final TalkgroupValueChangeListener mTalkgroupValueChangeListener = new TalkgroupValueChangeListener();
+    private final IntegerFormatter mDecimalFormatter = new IntegerFormatter(1, 65535);
+    private final HexFormatter mHexFormatter = new HexFormatter(1, 65535);
 
     /**
      * Constructs an instance
@@ -162,12 +162,15 @@ public class NBFMConfigurationEditor extends ChannelConfigurationEditor
 
             Label talkgroupLabel = new Label("Talkgroup To Assign");
             GridPane.setHalignment(talkgroupLabel, HPos.RIGHT);
-            GridPane.setConstraints(talkgroupLabel, 6, 0);
+            GridPane.setConstraints(talkgroupLabel, 0, 1);
             gridPane.getChildren().add(talkgroupLabel);
 
-            GridPane.setConstraints(getTalkgroupField(), 7, 0);
+            GridPane.setConstraints(getTalkgroupField(), 1, 1);
             gridPane.getChildren().add(getTalkgroupField());
 
+            GridPane.setConstraints(getAudioFilterEnable(), 2, 1);
+            gridPane.getChildren().add(getAudioFilterEnable());
+
             mDecoderPane.setContent(gridPane);
 
             //Special handling - the pill button doesn't like to set a selected state if the pane is not expanded,
@@ -275,6 +278,22 @@ public class NBFMConfigurationEditor extends ChannelConfigurationEditor
         return mAuxDecoderConfigurationEditor;
     }
 
+    /**
+     * Toggle switch for enable/disable the audio filtering in the audio module.
+     * @return toggle switch.
+     */
+    private ToggleSwitch getAudioFilterEnable()
+    {
+        if(mAudioFilterEnable == null)
+        {
+            mAudioFilterEnable = new ToggleSwitch("High-Pass Audio Filter");
+            mAudioFilterEnable.setTooltip(new Tooltip("High-pass filter to remove DC offset and sub-audible signalling"));
+            mAudioFilterEnable.selectedProperty().addListener((observable, oldValue, newValue) -> modifiedProperty().set(true));
+        }
+
+        return mAudioFilterEnable;
+    }
+
     private SegmentedButton getBandwidthButton()
     {
         if(mBandwidthButton == null)
@@ -298,31 +317,27 @@ public class NBFMConfigurationEditor extends ChannelConfigurationEditor
             //decode configuration and we're unable to correctly set the bandwidth setting.  As a work
             //around, we'll listen for the toggles to be added and update them here.  This normally only
             //happens when we first instantiate the editor and load an item for editing the first time.
-            mBandwidthButton.getToggleGroup().getToggles().addListener(new ListChangeListener<Toggle>()
+            mBandwidthButton.getToggleGroup().getToggles().addListener((ListChangeListener<Toggle>)c ->
             {
-                @Override
-                public void onChanged(Change<? extends Toggle> c)
+                //This change event happens when the toggles are added -- we don't need to inspect the change event
+                if(getItem() != null && getItem().getDecodeConfiguration() instanceof DecodeConfigNBFM)
                 {
-                    //This change event happens when the toggles are added -- we don't need to inspect the change event
-                    if(getItem() != null && getItem().getDecodeConfiguration() instanceof DecodeConfigNBFM)
+                    //Capture current modified state so that we can reapply after adjusting control states
+                    boolean modified = modifiedProperty().get();
+
+                    DecodeConfigNBFM config = (DecodeConfigNBFM)getItem().getDecodeConfiguration();
+                    DecodeConfigNBFM.Bandwidth bandwidth = config.getBandwidth();
+                    if(bandwidth == null)
                     {
-                        //Capture current modified state so that we can reapply after adjusting control states
-                        boolean modified = modifiedProperty().get();
-
-                        DecodeConfigNBFM config = (DecodeConfigNBFM)getItem().getDecodeConfiguration();
-                        DecodeConfigNBFM.Bandwidth bandwidth = config.getBandwidth();
-                        if(bandwidth == null)
-                        {
-                            bandwidth = DecodeConfigNBFM.Bandwidth.BW_12_5;
-                        }
-
-                        for(Toggle toggle: getBandwidthButton().getToggleGroup().getToggles())
-                        {
-                            toggle.setSelected(toggle.getUserData() == bandwidth);
-                        }
-
-                        modifiedProperty().set(modified);
+                        bandwidth = DecodeConfigNBFM.Bandwidth.BW_12_5;
                     }
+
+                    for(Toggle toggle: getBandwidthButton().getToggleGroup().getToggles())
+                    {
+                        toggle.setSelected(toggle.getUserData() == bandwidth);
+                    }
+
+                    modifiedProperty().set(modified);
                 }
             });
         }
@@ -449,6 +464,8 @@ public class NBFMConfigurationEditor extends ChannelConfigurationEditor
             mSquelchTextFormatter.setValue(decodeConfigNBFM.getSquelchThreshold());
             getSquelchAutoTrackSwitch().setDisable(false);
             getSquelchAutoTrackSwitch().setSelected(decodeConfigNBFM.isSquelchAutoTrack());
+            getAudioFilterEnable().setDisable(false);
+            getAudioFilterEnable().setSelected(decodeConfigNBFM.isAudioFilter());
         }
         else
         {
@@ -464,6 +481,8 @@ public class NBFMConfigurationEditor extends ChannelConfigurationEditor
             getSquelchThresholdField().setDisable(true);
             getSquelchAutoTrackSwitch().setDisable(true);
             getSquelchAutoTrackSwitch().setSelected(false);
+            getAudioFilterEnable().setDisable(true);
+            getAudioFilterEnable().setSelected(false);
         }
     }
 
@@ -500,6 +519,7 @@ public class NBFMConfigurationEditor extends ChannelConfigurationEditor
         config.setTalkgroup(talkgroup);
         config.setSquelchThreshold(mSquelchTextFormatter.getValue());
         config.setSquelchAutoTrack(getSquelchAutoTrackSwitch().isSelected());
+        config.setAudioFilter(getAudioFilterEnable().isSelected());
         getItem().setDecodeConfiguration(config);
     }
 

src/main/java/io/github/dsheirer/gui/playlist/streaming/RdioScannerEditor.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- *  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
@@ -20,21 +20,16 @@
 package io.github.dsheirer.gui.playlist.streaming;
 
 import io.github.dsheirer.audio.broadcast.BroadcastServerType;
-import io.github.dsheirer.audio.broadcast.rdioscanner.RdioScannerBroadcaster;
 import io.github.dsheirer.audio.broadcast.rdioscanner.RdioScannerConfiguration;
 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;
 
 /**
  * RdioScanner calls API configuration editor
@@ -42,6 +37,7 @@ import org.controlsfx.control.ToggleSwitch;
 public class RdioScannerEditor extends AbstractBroadcastEditor<RdioScannerConfiguration>
 {
     private final static Logger mLog = LoggerFactory.getLogger(RdioScannerEditor.class);
+    private static final String API_PATH = "/api/call-upload";
     private IntegerTextField mSystemIdTextField;
     private IntegerTextField mMaxAgeTextField;
     private TextField mApiKeyTextField;
@@ -71,7 +67,14 @@ public class RdioScannerEditor extends AbstractBroadcastEditor<RdioScannerConfig
         {
             getSystemIdTextField().set(item.getSystemID());
             getApiKeyTextField().setText(item.getApiKey());
-            getHostTextField().setText(item.getHost());
+            String url = item.getHost();
+
+            if(url != null)
+            {
+                url = url.replace(API_PATH, "");
+            }
+
+            getHostTextField().setText(url);
             getMaxAgeTextField().set((int)(item.getMaximumRecordingAge() / 1000));
         }
         else
@@ -97,7 +100,13 @@ public class RdioScannerEditor extends AbstractBroadcastEditor<RdioScannerConfig
         {
             int systemID = getSystemIdTextField().get() != null ? getSystemIdTextField().get() : 0;
             getItem().setSystemID(systemID);
-            getItem().setHost(getHostTextField().getText());
+            String host = getHostTextField().getText();
+            if(host != null)
+            {
+                host = host.replace(API_PATH, "");
+                host += API_PATH;
+                getItem().setHost(host);
+            }
             getItem().setApiKey(getApiKeyTextField().getText());
             getItem().setMaximumRecordingAge(getMaxAgeTextField().get() * 1000);
         }
@@ -169,6 +178,11 @@ public class RdioScannerEditor extends AbstractBroadcastEditor<RdioScannerConfig
             GridPane.setConstraints(getHostTextField(), 1, row);
             mEditorPane.getChildren().add(getHostTextField());
 
+            Label apiPath = new Label("/api/call-upload");
+            GridPane.setHalignment(apiPath, HPos.LEFT);
+            GridPane.setConstraints(apiPath, 2, row);
+            mEditorPane.getChildren().add(apiPath);
+
             Label maxAgeLabel = new Label("Max Recording Age (seconds)");
             GridPane.setHalignment(maxAgeLabel, HPos.RIGHT);
             GridPane.setConstraints(maxAgeLabel, 0, ++row);

src/main/java/io/github/dsheirer/identifier/dcs/DCSIdentifier.java

@@ -17,28 +17,32 @@
  * ****************************************************************************
  */
 
-// Generated by jextract
+package io.github.dsheirer.identifier.dcs;
 
-package io.github.dsheirer.source.tuner.sdrplay.api.v3_08;
+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.module.decode.dcs.DCSCode;
+import io.github.dsheirer.protocol.Protocol;
 
-import java.lang.foreign.FunctionDescriptor;
-import java.lang.invoke.MethodHandle;
-class constants$10 {
+/**
+ * Digital Coded Squelch code identifier.  This is decoded from the transmitted signal and represents the FROM role.
+ */
+public class DCSIdentifier extends Identifier<DCSCode>
+{
+    /**
+     * Constructs an instance.
+     * @param code detected.
+     */
+    public DCSIdentifier(DCSCode code)
+    {
+        super(code, IdentifierClass.USER, Form.TONE, Role.FROM);
+    }
 
-    static final FunctionDescriptor sdrplay_api_SwapRspDuoMode$FUNC = FunctionDescriptor.of(Constants$root.C_LONG$LAYOUT,
-        Constants$root.C_POINTER$LAYOUT,
-        Constants$root.C_POINTER$LAYOUT,
-        Constants$root.C_LONG$LAYOUT,
-        Constants$root.C_DOUBLE$LAYOUT,
-        Constants$root.C_LONG$LAYOUT,
-        Constants$root.C_LONG$LAYOUT,
-        Constants$root.C_LONG$LAYOUT,
-        Constants$root.C_LONG$LAYOUT
-    );
-    static final MethodHandle sdrplay_api_SwapRspDuoMode$MH = RuntimeHelper.downcallHandle(
-        "sdrplay_api_SwapRspDuoMode",
-        constants$10.sdrplay_api_SwapRspDuoMode$FUNC
-    );
+    @Override
+    public Protocol getProtocol()
+    {
+        return Protocol.DCS;
+    }
 }
-
-

src/main/java/io/github/dsheirer/module/HistoryModule.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- *  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
@@ -21,7 +21,6 @@ package io.github.dsheirer.module;
 
 import io.github.dsheirer.sample.Broadcaster;
 import io.github.dsheirer.sample.Listener;
-
 import java.util.ArrayList;
 import java.util.List;
 
@@ -50,7 +49,7 @@ public abstract class HistoryModule<T> extends Module implements Listener<T>
      */
     public List<T> getItems()
     {
-    return new ArrayList<>(mItems);
+        return new ArrayList<>(mItems);
     }
 
     @Override

src/main/java/io/github/dsheirer/module/ProcessingChain.java

@@ -117,8 +117,8 @@ public class ProcessingChain implements Listener<ChannelEvent>
     private Broadcaster<IMessage> mMessageBroadcaster = new Broadcaster<>();
     private Broadcaster<SquelchStateEvent> mSquelchStateEventBroadcaster = new Broadcaster<>();
     private AtomicBoolean mRunning = new AtomicBoolean();
-    private DecodeEventHistory mDecodeEventHistory = new DecodeEventHistory(500);
-    private MessageHistory mMessageHistory = new MessageHistory(500);
+    private DecodeEventHistory mDecodeEventHistory = new DecodeEventHistory(200);
+    private MessageHistory mMessageHistory = new MessageHistory(200);
     private AbstractChannelState mChannelState;
     private EventBus mEventBus;
     protected Source mSource;

src/main/java/io/github/dsheirer/module/decode/Decoder.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
@@ -23,11 +23,14 @@ import io.github.dsheirer.message.IMessageProvider;
 import io.github.dsheirer.module.Module;
 import io.github.dsheirer.sample.Listener;
 
+/**
+ * Base decoder class.
+ */
 public abstract class Decoder extends Module implements IMessageProvider
 {
-    /* This has to be a broadcaster in order for references to persist */
     private Listener<IMessage> mMessageDistributor = new MessageDistributor();
     protected Listener<IMessage> mMessageListener;
+    private boolean mRunning;
 
     /**
      * Decoder - parent class for all decoders, demodulators and components.
@@ -36,14 +39,29 @@ public abstract class Decoder extends Module implements IMessageProvider
     {
     }
 
+    /**
+     * Starts this decoder and sets the running flag to true.
+     */
     public void start()
     {
-        //no-op
+        mRunning = true;
     }
 
+    /**
+     * Stops this decoder and sets the running flag to false.
+     */
     public void stop()
     {
-        //no-op
+        mRunning = false;
+    }
+
+    /**
+     * Indicates if this decoder is currently started and in a running state.
+     * @return true if running or false if not.
+     */
+    public boolean isRunning()
+    {
+        return mRunning;
     }
 
     public void reset()

src/main/java/io/github/dsheirer/module/decode/DecoderFactory.java

@@ -39,11 +39,15 @@ import io.github.dsheirer.module.decode.am.AMDecoderState;
 import io.github.dsheirer.module.decode.am.DecodeConfigAM;
 import io.github.dsheirer.module.decode.config.AuxDecodeConfiguration;
 import io.github.dsheirer.module.decode.config.DecodeConfiguration;
+import io.github.dsheirer.module.decode.dcs.DCSDecoder;
+import io.github.dsheirer.module.decode.dcs.DCSDecoderState;
+import io.github.dsheirer.module.decode.dcs.DCSMessageFilter;
 import io.github.dsheirer.module.decode.dmr.DMRDecoder;
 import io.github.dsheirer.module.decode.dmr.DMRDecoderState;
 import io.github.dsheirer.module.decode.dmr.DMRTrafficChannelManager;
 import io.github.dsheirer.module.decode.dmr.DecodeConfigDMR;
 import io.github.dsheirer.module.decode.dmr.audio.DMRAudioModule;
+import io.github.dsheirer.module.decode.dmr.message.filter.DmrMessageFilterSet;
 import io.github.dsheirer.module.decode.fleetsync2.Fleetsync2Decoder;
 import io.github.dsheirer.module.decode.fleetsync2.Fleetsync2DecoderState;
 import io.github.dsheirer.module.decode.fleetsync2.FleetsyncMessageFilter;
@@ -77,16 +81,18 @@ import io.github.dsheirer.module.decode.p25.phase1.DecodeConfigP25Phase1;
 import io.github.dsheirer.module.decode.p25.phase1.P25P1DecoderC4FM;
 import io.github.dsheirer.module.decode.p25.phase1.P25P1DecoderLSM;
 import io.github.dsheirer.module.decode.p25.phase1.P25P1DecoderState;
-import io.github.dsheirer.module.decode.p25.phase1.message.filter.P25MessageFilterSet;
+import io.github.dsheirer.module.decode.p25.phase1.message.filter.P25P1MessageFilterSet;
 import io.github.dsheirer.module.decode.p25.phase2.DecodeConfigP25Phase2;
 import io.github.dsheirer.module.decode.p25.phase2.P25P2DecoderHDQPSK;
 import io.github.dsheirer.module.decode.p25.phase2.P25P2DecoderState;
+import io.github.dsheirer.module.decode.p25.phase2.message.filter.P25P2MessageFilterSet;
 import io.github.dsheirer.module.decode.passport.DecodeConfigPassport;
 import io.github.dsheirer.module.decode.passport.PassportDecoder;
 import io.github.dsheirer.module.decode.passport.PassportDecoderState;
 import io.github.dsheirer.module.decode.passport.PassportMessageFilter;
 import io.github.dsheirer.module.decode.tait.Tait1200Decoder;
 import io.github.dsheirer.module.decode.tait.Tait1200DecoderState;
+import io.github.dsheirer.module.decode.tait.Tait1200MessageFilter;
 import io.github.dsheirer.module.decode.traffic.TrafficChannelManager;
 import io.github.dsheirer.module.demodulate.fm.FMDemodulatorModule;
 import io.github.dsheirer.preference.UserPreferences;
@@ -98,12 +104,14 @@ import java.util.List;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+/**
+ * Factory for creating decoder modules to use in a processing chain for any supported protocols.
+ */
 public class DecoderFactory
 {
     private final static Logger mLog = LoggerFactory.getLogger(DecoderFactory.class);
-
     private static final double FM_CHANNEL_BANDWIDTH = 12500.0;
-    private static final double DEMODULATED_AUDIO_SAMPLE_RATE = 8000.0;
+    private static final boolean AUDIO_FILTER_ENABLE = true;
 
     /**
      * Returns a list of one primary decoder and any auxiliary decoders, as
@@ -179,6 +187,13 @@ public class DecoderFactory
         return modules;
     }
 
+    /**
+     * Creates decoder modules for APCO-25 Phase 2 decoder
+     * @param channel configuration
+     * @param userPreferences reference
+     * @param modules collection to add to
+     * @param aliasList for the channel
+     */
     private static void processP25Phase2(Channel channel, UserPreferences userPreferences, List<Module> modules, AliasList aliasList) {
         modules.add(new P25P2DecoderHDQPSK((DecodeConfigP25Phase2)channel.getDecodeConfiguration()));
 
@@ -188,6 +203,13 @@ public class DecoderFactory
         modules.add(new P25P2AudioModule(userPreferences, 1, aliasList));
     }
 
+    /**
+     * Creates decoder modules for APCO-25 Phase 1 decoder
+     * @param channel configuration
+     * @param userPreferences reference
+     * @param modules collection to add to
+     * @param aliasList for the channel
+     */
     private static void processP25Phase1(Channel channel, UserPreferences userPreferences, List<Module> modules, AliasList aliasList, ChannelType channelType, DecodeConfigP25Phase1 decodeConfig) {
         DecodeConfigP25Phase1 p25Config = decodeConfig;
 
@@ -228,16 +250,32 @@ public class DecoderFactory
         }
     }
 
+    /**
+     * Creates decoder modules for Passport decoder
+     * @param channel configuration
+     * @param modules collection to add to
+     * @param aliasList for the channel
+     * @param decodeConfig for the channel
+     */
     private static void processPassport(Channel channel, List<Module> modules, AliasList aliasList, DecodeConfiguration decodeConfig) {
         modules.add(new PassportDecoder(decodeConfig));
         modules.add(new PassportDecoderState());
-        modules.add(new AudioModule(aliasList));
+        modules.add(new AudioModule(aliasList, AUDIO_FILTER_ENABLE));
         if(channel.getSourceConfiguration().getSourceType() == SourceType.TUNER)
         {
-            modules.add(new FMDemodulatorModule(FM_CHANNEL_BANDWIDTH, DEMODULATED_AUDIO_SAMPLE_RATE));
+            modules.add(new FMDemodulatorModule(FM_CHANNEL_BANDWIDTH));
         }
     }
 
+    /**
+     * Creates decoder modules for MPT-1327 decoder
+     * @param channelMapModel to use in calculating traffic channel frequencies
+     * @param channel configuration
+     * @param modules collection to add to
+     * @param aliasList for the channel
+     * @param channelType for control or traffic
+     * @param decodeConfig configuration
+     */
     private static void processMPT1327(ChannelMapModel channelMapModel, Channel channel, List<Module> modules, AliasList aliasList, ChannelType channelType, DecodeConfigMPT1327 decodeConfig) {
         DecodeConfigMPT1327 mptConfig = decodeConfig;
         ChannelMap channelMap = channelMapModel.getChannelMap(mptConfig.getChannelMapName());
@@ -250,12 +288,12 @@ public class DecoderFactory
         // not create a new segment if the processing chain finishes a bit after
         // actual call timeout.
         long maxAudioSegmentLengthMillis = (callTimeoutMilliseconds + 5000);
-        modules.add(new AudioModule(aliasList, AbstractAudioModule.DEFAULT_TIMESLOT, maxAudioSegmentLengthMillis));
+        modules.add(new AudioModule(aliasList, AbstractAudioModule.DEFAULT_TIMESLOT, maxAudioSegmentLengthMillis, AUDIO_FILTER_ENABLE));
 
         SourceType sourceType = channel.getSourceConfiguration().getSourceType();
         if(sourceType == SourceType.TUNER || sourceType == SourceType.TUNER_MULTIPLE_FREQUENCIES)
         {
-            modules.add(new FMDemodulatorModule(FM_CHANNEL_BANDWIDTH, DEMODULATED_AUDIO_SAMPLE_RATE));
+            modules.add(new FMDemodulatorModule(FM_CHANNEL_BANDWIDTH));
         }
 
         if(channelType == ChannelType.STANDARD)
@@ -280,27 +318,48 @@ public class DecoderFactory
         }
     }
 
+    /**
+     * Creates decoder modules for LTR-Net decoder
+     * @param channel configuration
+     * @param modules collection to add to
+     * @param aliasList for the channel
+     * @param decodeConfig for the channel
+     */
     private static void processLTRNet(Channel channel, List<Module> modules, AliasList aliasList, DecodeConfigLTRNet decodeConfig) {
         modules.add(new LTRNetDecoder(decodeConfig));
         modules.add(new LTRNetDecoderState());
-        modules.add(new AudioModule(aliasList));
+        modules.add(new AudioModule(aliasList, AUDIO_FILTER_ENABLE));
         if(channel.getSourceConfiguration().getSourceType() == SourceType.TUNER)
         {
-            modules.add(new FMDemodulatorModule(FM_CHANNEL_BANDWIDTH, DEMODULATED_AUDIO_SAMPLE_RATE));
+            modules.add(new FMDemodulatorModule(FM_CHANNEL_BANDWIDTH));
         }
     }
 
+    /**
+     * Creates decoder modules for LTR decoder
+     * @param channel configuration
+     * @param modules collection to add to
+     * @param aliasList for the channel
+     * @param decodeConfig for the channel
+     */
     private static void processLTRStandard(Channel channel, List<Module> modules, AliasList aliasList, DecodeConfigLTRStandard decodeConfig) {
         MessageDirection direction = decodeConfig.getMessageDirection();
-        modules.add(new LTRStandardDecoder(null, direction));
+        modules.add(new LTRStandardDecoder(direction));
         modules.add(new LTRStandardDecoderState());
-        modules.add(new AudioModule(aliasList));
+        modules.add(new AudioModule(aliasList, AUDIO_FILTER_ENABLE));
         if(channel.getSourceConfiguration().getSourceType() == SourceType.TUNER)
         {
-            modules.add(new FMDemodulatorModule(FM_CHANNEL_BANDWIDTH, DEMODULATED_AUDIO_SAMPLE_RATE));
+            modules.add(new FMDemodulatorModule(FM_CHANNEL_BANDWIDTH));
         }
     }
 
+    /**
+     * Creates decoder modules for Narrow Band FM decoder
+     * @param channel configuration
+     * @param modules collection to add to
+     * @param aliasList for the channel
+     * @param decodeConfig for the channel
+     */
     private static void processNBFM(Channel channel, List<Module> modules, AliasList aliasList, DecodeConfiguration decodeConfig)
     {
         if(!(decodeConfig instanceof DecodeConfigNBFM))
@@ -312,9 +371,16 @@ public class DecoderFactory
         DecodeConfigNBFM decodeConfigNBFM = (DecodeConfigNBFM)decodeConfig;
         modules.add(new NBFMDecoder(decodeConfigNBFM));
         modules.add(new NBFMDecoderState(channel.getName(), decodeConfigNBFM));
-        modules.add(new AudioModule(aliasList));
+        modules.add(new AudioModule(aliasList, 0, 60000, decodeConfigNBFM.isAudioFilter()));
     }
 
+    /**
+     * Creates decoder modules for AM decoder
+     * @param channel configuration
+     * @param modules collection to add to
+     * @param aliasList for the channel
+     * @param decodeConfig for the channel
+     */
     private static void processAM(Channel channel, List<Module> modules, AliasList aliasList, DecodeConfiguration decodeConfig) {
 
         if(!(decodeConfig instanceof DecodeConfigAM))
@@ -326,7 +392,7 @@ public class DecoderFactory
         DecodeConfigAM decodeConfigAM = (DecodeConfigAM) decodeConfig;
         modules.add(new AMDecoder(decodeConfigAM));
         modules.add(new AMDecoderState(channel.getName(), decodeConfigAM));
-        modules.add(new AudioModule(aliasList));
+        modules.add(new AudioModule(aliasList, 0, 60000, AUDIO_FILTER_ENABLE));
     }
 
     /**
@@ -381,7 +447,7 @@ public class DecoderFactory
     }
 
     /**
-     * Constructs a list of auxiliary decoders, as specified in the configuration
+     * Constructs a list of auxiliary decoders, as specified in the channel configuration
      *
      * @param config - auxiliary configuration
      * @return - list of auxiliary decoders
@@ -396,6 +462,10 @@ public class DecoderFactory
             {
                 switch(auxDecoder)
                 {
+                    case DCS:
+                        modules.add(new DCSDecoder());
+                        modules.add(new DCSDecoderState());
+                        break;
                     case FLEETSYNC2:
                         modules.add(new Fleetsync2Decoder());
                         modules.add(new Fleetsync2DecoderState());
@@ -427,7 +497,7 @@ public class DecoderFactory
      */
     public static FilterSet<IMessage> getMessageFilters(List<Module> modules)
     {
-        FilterSet<IMessage> filterSet = new FilterSet<>();
+        FilterSet<IMessage> filterSet = new FilterSet<>("Message Filters");
 
         for(Module module : modules)
         {
@@ -437,25 +507,28 @@ public class DecoderFactory
             }
         }
 
-        /* If we don't have any filters, add an ALL-PASS filter */
-        if(filterSet.getFilters().isEmpty())
-        {
-            filterSet.addFilter(new AllPassFilter<>());
-        }
+        //Add an all-others filter as a catch-all for anything that isn't handled by the decoder filters.
+        filterSet.addFilter(new AllPassFilter<>("All Other Messages Filter"));
 
         return filterSet;
     }
 
     /**
      * Returns a set of IMessageFilter objects (FilterSets or Filters) that
-     * can process all of the messages produced by the specified decoder type.
+     * can process all messages produced by the specified decoder type.
      */
     public static List<IFilter<IMessage>> getMessageFilter(DecoderType decoder)
     {
-        ArrayList<IFilter<IMessage>> filters = new ArrayList<>();
+        List<IFilter<IMessage>> filters = new ArrayList<>();
 
         switch(decoder)
         {
+            case DCS:
+                filters.add(new DCSMessageFilter());
+                break;
+            case DMR:
+                filters.add(new DmrMessageFilterSet());
+                break;
             case FLEETSYNC2:
                 filters.add(new FleetsyncMessageFilter());
                 break;
@@ -475,13 +548,16 @@ public class DecoderFactory
                 filters.add(new MPT1327MessageFilter());
                 break;
             case P25_PHASE1:
-                filters.add(new P25MessageFilterSet());
+                filters.add(new P25P1MessageFilterSet());
+                break;
+            case P25_PHASE2:
+                filters.add(new P25P2MessageFilterSet());
                 break;
             case PASSPORT:
                 filters.add(new PassportMessageFilter());
                 break;
-            case DMR:
-                //filters.add(new DMR) //todo: not finished
+            case TAIT_1200:
+                filters.add(new Tait1200MessageFilter());
                 break;
             default:
                 break;
@@ -518,7 +594,7 @@ public class DecoderFactory
             case P25_PHASE2:
                 return new DecodeConfigP25Phase2();
             default:
-                throw new IllegalArgumentException("DecodeConfigFactory - unknown decoder type [" + decoder.toString() + "]");
+                throw new IllegalArgumentException("DecodeConfigFactory - unknown decoder type [" + decoder + "]");
         }
     }
 

src/main/java/io/github/dsheirer/module/decode/DecoderType.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
@@ -19,7 +19,6 @@
 package io.github.dsheirer.module.decode;
 
 import io.github.dsheirer.protocol.Protocol;
-
 import java.util.EnumSet;
 
 /**
@@ -39,6 +38,7 @@ public enum DecoderType
     P25_PHASE2("P25 Phase 2", "P25-2", Protocol.APCO25_PHASE2),
 
     //Auxiliary Decoders
+    DCS("Digital Coded Squelch (DCS)", "DCS", Protocol.DCS),
     FLEETSYNC2("Fleetsync II", "Fleetsync2", Protocol.FLEETSYNC),
     LJ_1200("LJ1200 173.075", "LJ1200", Protocol.LOJACK),
     MDC1200("MDC1200", "MDC1200", Protocol.MDC1200),
@@ -73,7 +73,8 @@ public enum DecoderType
      * Auxiliary decoders that operate on in-band signalling in the decoded audio channel
      */
     public static final EnumSet<DecoderType> AUX_DECODERS =
-        EnumSet.of(DecoderType.FLEETSYNC2,
+        EnumSet.of(DecoderType.DCS,
+        DecoderType.FLEETSYNC2,
         DecoderType.LJ_1200,
         DecoderType.MDC1200,
         DecoderType.TAIT_1200);

src/main/java/io/github/dsheirer/module/decode/analog/AnalogDecoderState.java

@@ -26,6 +26,7 @@ import io.github.dsheirer.identifier.Identifier;
 import io.github.dsheirer.identifier.IdentifierCollection;
 import io.github.dsheirer.message.IMessage;
 import io.github.dsheirer.module.decode.event.DecodeEvent;
+import io.github.dsheirer.module.decode.event.DecodeEventType;
 import io.github.dsheirer.module.decode.p25.identifier.channel.StandardChannel;
 import io.github.dsheirer.sample.Listener;
 import io.github.dsheirer.source.ISourceEventListener;
@@ -100,9 +101,8 @@ public abstract class AnalogDecoderState extends DecoderState implements ISource
 
         if(mDecodeEvent == null)
         {
-            mDecodeEvent = DecodeEvent.builder(System.currentTimeMillis())
+            mDecodeEvent = DecodeEvent.builder(DecodeEventType.CALL, System.currentTimeMillis())
                     .channel(mChannelDescriptor)
-                    .eventDescription("CALL")
                     .details(getDecoderType().name())
                     .identifiers(new IdentifierCollection(getIdentifierCollection().getIdentifiers()))
                     .build();
@@ -121,6 +121,7 @@ public abstract class AnalogDecoderState extends DecoderState implements ISource
             startCallEvent();
         }
 
+        getIdentifierCollection().update(getTalkgroupIdentifier());
         mDecodeEvent.update(System.currentTimeMillis());
         broadcast(mDecodeEvent);
     }

src/main/java/io/github/dsheirer/module/decode/dcs/DCSCode.java

@@ -0,0 +1,281 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.dcs;
+
+import java.util.EnumSet;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * DCS codes as defined in ETSI TS 103 236 V1.1.1
+ *
+ * Code values are the bit reversed integer values of the 23-bit binary sequence representation.  The values are bit
+ * reversed for normal (N) codes and as specified in the ETSI chart for the inverted (I) codes to align with the
+ * transmitted format.
+ */
+public enum DCSCode
+{
+    //Inverted codes
+    I023(7747603),
+    I025(7043093),
+    I026(6674454),
+    I031(5371929),
+    I032(6248474),
+    I043(5990435),
+    I047(1038375),
+    I051(8169513),
+    I054(7292972),
+    I065(6101045),
+    I071(6789177),
+    I072(6895674),
+    I073(3041339),
+    I074(7632956),
+    I114(3532876),
+    I115(7518285),
+    I116(8132686),
+    I125(505941),
+    I131(4012121),
+    I132(3381338),
+    I134(3070044),
+    I143(3647587),
+    I152(2017386),
+    I155(4511853),
+    I156(4880494),
+    I162(7063666),
+    I165(3266677),
+    I172(391290),
+    I174(1620092),
+    I205(7248005),
+    I223(6875283),
+    I226(8063126),
+    I243(4569251),
+    I244(2074788),
+    I245(5830821),
+    I251(6453417),
+    I261(1538225),
+    I263(6195379),
+    I265(4442293),
+    I271(7948473),
+    I306(850118),
+    I311(3725513),
+    I315(7104717),
+    I331(2353369),
+    I343(2717923),
+    I346(3840230),
+    I351(964841),
+    I364(6838516),
+    I365(3082485),
+    I371(1411321),
+    I411(7825673),
+    I412(7981322),
+    I413(4102411),
+    I423(4954387),
+    I431(7100697),
+    I432(6486298),
+    I445(8096037),
+    I464(2615604),
+    I465(6338869),
+    I466(7215414),
+    I503(3959107),
+    I506(3115334),
+    I516(4307278),
+    I532(932186),
+    I546(1698150),
+    I565(817525),
+    I606(6134150),
+    I612(6756746),
+    I624(1005972),
+    I627(129431),
+    I631(7506329),
+    I632(8137114),
+    I654(4995500),
+    I662(2390450),
+    I664(3750324),
+    I703(2275779),
+    I712(776650),
+    I723(3770835),
+    I731(1984985),
+    I732(1108442),
+    I734(895452),
+    I743(1366499),
+    I754(2161132),
+
+    //Normal codes
+    N023(6557239),
+    N025(5508971),
+    N026(3411411),
+    N031(4984773),
+    N032(2887037),
+    N043(6425453),
+    N047(7474680),
+    N051(4852383),
+    N054(1706363),
+    N065(5639261),
+    N071(5115123),
+    N072(3018315),
+    N073(7211834),
+    N074(1969943),
+    N114(1641430),
+    N115(5836455),
+    N116(3738655),
+    N125(5574384),
+    N131(5049950),
+    N132(2952422),
+    N134(1904058),
+    N143(6490870),
+    N152(2820540),
+    N155(5967249),
+    N156(3870505),
+    N162(2558443),
+    N165(5705158),
+    N172(3084240),
+    N174(2035340),
+    N205(5278907),
+    N223(6589323),
+    N226(3442799),
+    N243(6459089),
+    N244(1215228),
+    N245(5410701),
+    N251(4886307),
+    N261(4624244),
+    N263(6719677),
+    N265(5671393),
+    N271(5146959),
+    N306(3248024),
+    N311(4820366),
+    N315(5868315),
+    N331(5082082),
+    N343(6524746),
+    N346(3378350),
+    N351(4951736),
+    N364(1543435),
+    N365(5736570),
+    N371(5212372),
+    N411(4737911),
+    N412(2640335),
+    N413(6835390),
+    N423(6573289),
+    N431(5000475),
+    N432(2903971),
+    N445(5392623),
+    N464(1461234),
+    N465(5656195),
+    N466(3558459),
+    N503(6376222),
+    N506(3229946),
+    N516(3755713),
+    N532(2969144),
+    N546(3361740),
+    N565(5721880),
+    N606(3198173),
+    N612(2673779),
+    N624(1363320),
+    N627(7655360),
+    N631(5032103),
+    N632(2935327),
+    N654(1756697),
+    N662(2543378),
+    N664(1494606),
+    N703(6409890),
+    N712(2739688),
+    N723(6670542),
+    N731(5097788),
+    N732(3001220),
+    N734(1952472),
+    N743(6540692),
+    N754(1822594),
+    UNKNOWN(0);
+
+    private int mValue;
+
+    DCSCode(int value)
+    {
+        mValue = value;
+    }
+
+    /**
+     * Inverted DCS codes
+     */
+    private static final EnumSet<DCSCode> INVERTED_CODES = EnumSet.range(I023, I754);
+
+    /**
+     * Lookup map for quickly finding a DCS code from the transmitted value.
+     */
+    private static final Map<Integer,DCSCode> CODE_MAP = new HashMap<>();
+
+    static
+    {
+       for(DCSCode code: EnumSet.range(I023, N754))
+        {
+            CODE_MAP.put(code.getValue(), code);
+        }
+    }
+
+    /**
+     * Integer value of the code from transmitted bits.
+     * @return value
+     */
+    public int getValue()
+    {
+        return mValue;
+    }
+
+    /**
+     * Indicates if this is an inverted DCS code (true) or a normal DCS code (false).
+     * @return true if inverted.
+     */
+    public boolean isInverted()
+    {
+        return INVERTED_CODES.contains(this);
+    }
+
+    @Override
+    public String toString()
+    {
+        return "DCS-" + name().substring(1, 4) + (isInverted() ? " Inverted" : "");
+    }
+
+    /**
+     * Indicates if the value maps to a known DCS code.
+     * @param value to test
+     * @return true if the value matches a DCS code.
+     */
+    public static boolean hasValue(int value)
+    {
+        return CODE_MAP.containsKey(value);
+    }
+
+    /**
+     * Get the DCS code that matches the value, otherwise return UNKNOWN.
+     * @param value to lookup
+     * @return matching DCS code or UNKNOWN.
+     */
+    public static DCSCode fromValue(int value)
+    {
+        DCSCode code = CODE_MAP.get(value);
+
+        if(code == null)
+        {
+            code = UNKNOWN;
+        }
+
+        return code;
+    }
+}

src/main/java/io/github/dsheirer/module/decode/dcs/DCSDecoder.java

@@ -0,0 +1,293 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.dcs;
+
+import io.github.dsheirer.dsp.filter.FilterFactory;
+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.module.decode.Decoder;
+import io.github.dsheirer.module.decode.DecoderType;
+import io.github.dsheirer.sample.Listener;
+import io.github.dsheirer.sample.real.IRealBufferListener;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Digital Coded Squelch (DCS) demodulator/decoder designed to work with FM demodulated 8 kHz input audio samples and
+ * decode 134.4-baud signalling present in the unfiltered demodulated audio stream.
+ *
+ * This decoder monitors the incoming sample stream looking for either a positive or negative sequence of samples where
+ * the slope of these values exceeds a threshold and causes the symbol state to flip.  The symbol state remains across
+ * successive baud periods until the next opposing slope state change sequence is detected.
+ *
+ * This decoder uses a slope detector to decode the 134.4 bits per second stream and identify the DCS code.  It is
+ * designed to work with 8 kHz audio sample rate.  Each baud period is (8,000 / 134.4) = 59.52 samples per symbol and
+ * a full DCS tone sequence is 23 bits * 59.52 samples/bit = 1369 samples.  The DCS tone sequence is continuously
+ * transmitted at a rate of 134.4 bits-per-second / 23 = 5.84 repeats per second while the source continues transmitting.
+ */
+public class DCSDecoder extends Decoder implements IRealBufferListener, Listener<float[]>
+{
+    private static final Logger mLog = LoggerFactory.getLogger(DCSDecoder.class);
+    //Slope calculation sumXX value is always the same for 59 evenly spaced samples
+    private static final double SLOPE_CALCULATION_SUM_XX = 2247.5;
+    private static final float BAUD_LENGTH = 8000.0f / 134.4f;
+    private static final float SLOPE_THRESHOLD = 0.002750f;
+    private static final int MAX_ONES_SEQUENCE = 6;
+    private static final int OVERLAP = (int)Math.ceil(BAUD_LENGTH);
+    private static final int POST_TRANSITION_SAMPLES_TO_SKIP = 30;
+    private static final int SLOPE_CALCULATION_PERIOD = 30;
+    private static final int IDEAL_SYMBOL_TRANSITION_MIN = 11;
+    private static final int IDEAL_SYMBOL_TRANSITION_MAX = 19;
+    private static final int CODE_MASK = 0x7FFFFF; //23-bit mask
+    private static float[] sLowPassFilterCoefficients;
+    private boolean mSymbol = false;
+    private float mBaudCounter = 0f;
+    private float mMaxSlope = 0;
+    private float[] mResidual = new float[OVERLAP];
+    private int mCode = 0;
+    private int mExcessiveOneSequenceCounter = 0;
+
+    static
+    {
+        FIRFilterSpecification specification = FIRFilterSpecification.lowPassBuilder()
+                .sampleRate(8000)
+                .gridDensity(16)
+                .oddLength(true)
+                .passBandCutoff(200)
+                .passBandAmplitude(1.0)
+                .passBandRipple(0.01)
+                .stopBandStart(300)
+                .stopBandAmplitude(0.0)
+                .stopBandRipple(0.03) //Approximately 60 dB attenuation
+                .build();
+
+        try
+        {
+            RemezFIRFilterDesigner designer = new RemezFIRFilterDesigner(specification);
+
+            if(designer.isValid())
+            {
+                sLowPassFilterCoefficients = designer.getImpulseResponse();
+            }
+        }
+        catch(FilterDesignException fde)
+        {
+            mLog.error("Filter design error", fde);
+        }
+    }
+
+    private IRealFilter mLowPassFilter = FilterFactory.getRealFilter(sLowPassFilterCoefficients);
+
+    /**
+     * Constructs an instance
+     */
+    public DCSDecoder()
+    {
+    }
+
+    /**
+     * Decoder type
+     */
+    @Override
+    public DecoderType getDecoderType()
+    {
+        return DecoderType.DCS;
+    }
+
+    /**
+     * Implementation of the IRealBufferListener interface
+     */
+    @Override
+    public Listener<float[]> getBufferListener()
+    {
+        return this::receive;
+    }
+
+    /**
+     * 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.
+     */
+    public void receive(float[] samples)
+    {
+        if(getMessageListener() != null)
+        {
+            float[] filtered = mLowPassFilter.filter(samples);
+            float[] buffer = new float[filtered.length + OVERLAP];
+            int samplesToSkip = 0;
+            int timingAdjust = 0;
+            float slope = 0;
+
+            try
+            {
+                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++)
+                {
+                    //Don't calculate slope if we're within the baud period following the last symbol transition
+                    if(samplesToSkip > 0)
+                    {
+                        samplesToSkip--;
+                    }
+                    else
+                    {
+                        slope = calculateSlope(buffer, bufferPointer);
+
+                        if(mSymbol)
+                        {
+                            //Look 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 & 19 samples
+                                if(mBaudCounter < IDEAL_SYMBOL_TRANSITION_MIN)
+                                {
+                                    timingAdjust = 1;
+                                }
+                                else if(mBaudCounter > IDEAL_SYMBOL_TRANSITION_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 & 19 samples
+                                if(mBaudCounter < IDEAL_SYMBOL_TRANSITION_MIN)
+                                {
+                                    timingAdjust = 1;
+                                }
+                                else if(mBaudCounter > IDEAL_SYMBOL_TRANSITION_MAX)
+                                {
+                                    timingAdjust = -1;
+                                }
+                                else
+                                {
+                                    timingAdjust = 0;
+                                }
+
+                                mBaudCounter += timingAdjust;
+                                samplesToSkip = POST_TRANSITION_SAMPLES_TO_SKIP + timingAdjust;
+                            }
+                            else if(slope > mMaxSlope)
+                            {
+                                mMaxSlope = slope;
+                            }
+                        }
+                    }
+
+                    mBaudCounter++;
+
+                    //Update the current code value once we've processed a baud/symbol period of samples
+                    if(mBaudCounter > BAUD_LENGTH)
+                    {
+                        //Update the code value adding in the current symbol
+                        mCode = (Integer.rotateLeft(mCode, 1) + (mSymbol ? 1 : 0)) & CODE_MASK;
+                        if(DCSCode.hasValue(mCode))
+                        {
+                            getMessageListener().receive(new DCSMessage(DCSCode.fromValue(mCode), System.currentTimeMillis()));
+                        }
+
+                        mBaudCounter -= BAUD_LENGTH;
+
+                        //Check for a continuous sequence of ones that exceeds the max (6) for any DCS code and
+                        //flip/revert the symbol state back to zero.
+                        if(mSymbol)
+                        {
+                            mExcessiveOneSequenceCounter++;
+
+                            if(mExcessiveOneSequenceCounter > MAX_ONES_SEQUENCE)
+                            {
+                                mSymbol = false;
+                                mMaxSlope = -1f;
+                                mExcessiveOneSequenceCounter = 0;
+                            }
+                        }
+                        else
+                        {
+                            mExcessiveOneSequenceCounter = 0;
+                        }
+                    }
+                }
+            }
+            catch(Exception e)
+            {
+                mLog.warn("Unexpected error while processing DCS samples", e);
+            }
+        }
+    }
+
+    /**
+     * Calculates the slope of the 30 samples in the values array starting at the specified offset.  The baud period
+     * is slightly more than 59 samples, however the voltage state transition occurs over a 30-sample period.
+     *
+     * Note: code modified from Apache Commons Math library, SimpleRegression class.
+     * @param samples to load from
+     * @param offset to the sample start for the slope calculation
+     */
+    public float calculateSlope(float[] samples, int offset)
+    {
+        /** mean of accumulated x & y values, used in updating formulas */
+        double xbar = 0;
+        double ybar = samples[offset];
+
+//        double sumXX = 0;
+        double sumXY = 0;
+        double fact1, dx, dy;
+
+        for(int x = 1; x < SLOPE_CALCULATION_PERIOD; x++)
+        {
+            fact1 = 1.0 + x;
+//            final double fact2 = x / (1.0 + x);
+            dx = x - xbar;
+            dy = samples[offset + x] - ybar;
+//            sumXX += dx * dx * fact2;
+            sumXY += dx * dy * (x / (1.0 + x));
+            xbar += dx / fact1;
+            ybar += dy / fact1;
+        }
+
+        //Transfer the sumXX value to SLOPE_CALCULATION_SUM_XX since it's a constant value
+//        mLog.info("SumXX: " + sumXX);
+
+        return (float)(sumXY / SLOPE_CALCULATION_SUM_XX);
+    }
+}

src/main/java/io/github/dsheirer/module/decode/dcs/DCSDecoderState.java

@@ -0,0 +1,123 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.dcs;
+
+import io.github.dsheirer.channel.state.DecoderState;
+import io.github.dsheirer.channel.state.DecoderStateEvent;
+import io.github.dsheirer.message.IMessage;
+import io.github.dsheirer.module.decode.DecoderType;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Maintains the decoder state from the stream of decoded DCS code messages.
+ */
+public class DCSDecoderState extends DecoderState
+{
+    private Map<DCSCode,Integer> mDcsCodeCountsMap = new HashMap<>();
+    private DCSCode mCurrentCode = DCSCode.UNKNOWN;
+
+    /**
+     * Constructs an instance
+     */
+    public DCSDecoderState()
+    {
+    }
+
+    @Override
+    public DecoderType getDecoderType()
+    {
+        return DecoderType.DCS;
+    }
+
+
+    @Override
+    public void receive(IMessage message)
+    {
+        if(message instanceof DCSMessage dcsMessage)
+        {
+            mCurrentCode = dcsMessage.getDCSCode();
+
+            if(!mDcsCodeCountsMap.containsKey(mCurrentCode))
+            {
+                mDcsCodeCountsMap.put(mCurrentCode, 1);
+            }
+            else
+            {
+                mDcsCodeCountsMap.put(mCurrentCode, mDcsCodeCountsMap.get(mCurrentCode) + 1);
+            }
+
+            getIdentifierCollection().update(dcsMessage.getIdentifiers());
+        }
+    }
+
+    @Override
+    public void receiveDecoderStateEvent(DecoderStateEvent event)
+    {
+        switch(event.getEvent())
+        {
+            case REQUEST_RESET:
+                resetState();
+                break;
+            default:
+                break;
+        }
+    }
+
+    @Override
+    public String getActivitySummary()
+    {
+        StringBuilder sb = new StringBuilder();
+        sb.append("=============================\n");
+        sb.append("Decoder:\tDigital Coded Squelch (DCS)\n\n");
+        if(mDcsCodeCountsMap.isEmpty())
+        {
+            sb.append("   Detected Codes: (none)\n");
+        }
+        else
+        {
+            for(Map.Entry<DCSCode,Integer> entry: mDcsCodeCountsMap.entrySet())
+            {
+                sb.append("   ").append(entry.getKey()).append(" - Count: ").append(entry.getValue());
+
+                if(entry.getKey().equals(mCurrentCode))
+                {
+                    sb.append(" - Current\n");
+                }
+                else
+                {
+                    sb.append("\n");
+                }
+            }
+        }
+
+        return sb.toString();
+    }
+
+    @Override
+    public void init()
+    {
+    }
+
+    @Override
+    public void stop()
+    {
+    }
+}

src/main/java/io/github/dsheirer/module/decode/dcs/DCSMessage.java

@@ -0,0 +1,79 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.dcs;
+
+import io.github.dsheirer.identifier.Identifier;
+import io.github.dsheirer.identifier.dcs.DCSIdentifier;
+import io.github.dsheirer.message.Message;
+import io.github.dsheirer.protocol.Protocol;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Digital Coded Squelch (DCS) tone detected message
+ */
+public class DCSMessage extends Message
+{
+    private final DCSCode mDCSCode;
+
+    /**
+     * Constructs an instance
+     * @param code that was detected
+     * @param timestamp when the code was detected
+     */
+    public DCSMessage(DCSCode code, long timestamp)
+    {
+        super(timestamp);
+        mDCSCode = code;
+    }
+
+    @Override
+    public String toString()
+    {
+        return "Digital Coded Squelch (DCS) Detected: " + mDCSCode.name();
+    }
+
+    /**
+     * The DCS code that was detected.
+     * @return code
+     */
+    public DCSCode getDCSCode()
+    {
+        return mDCSCode;
+    }
+
+    @Override
+    public boolean isValid()
+    {
+        return true; //We only send a message when the tone was valid
+    }
+
+    @Override
+    public Protocol getProtocol()
+    {
+        return Protocol.DCS;
+    }
+
+    @Override
+    public List<Identifier> getIdentifiers()
+    {
+        return Collections.singletonList(new DCSIdentifier(mDCSCode));
+    }
+}

src/main/java/io/github/dsheirer/module/decode/dcs/DCSMessageFilter.java

@@ -0,0 +1,76 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.dcs;
+
+import io.github.dsheirer.filter.Filter;
+import io.github.dsheirer.filter.FilterElement;
+import io.github.dsheirer.message.IMessage;
+import java.util.function.Function;
+
+/**
+ * Message filter for Digital Coded Squelch (DCS)
+ */
+public class DCSMessageFilter extends Filter<IMessage,String>
+{
+    private static final String DCS_KEY = "DCS";
+    private final KeyExtractor mKeyExtractor = new KeyExtractor();
+
+    /**
+     * Constructor
+     */
+    public DCSMessageFilter()
+    {
+        super("DCS Messages");
+        add(new FilterElement(DCS_KEY));
+    }
+
+    /**
+     * Indicates that this filter can process DCS messages.
+     * @param message to test
+     * @return true if the message can be processed
+     */
+    @Override
+    public boolean canProcess(IMessage message)
+    {
+        return message instanceof DCSMessage && super.canProcess(message);
+    }
+
+    /**
+     * Key extractor that always returns the same key constant.
+     * @return extractor function.
+     */
+    @Override
+    public Function<IMessage, String> getKeyExtractor()
+    {
+        return mKeyExtractor;
+    }
+
+    /**
+     * Key extractor
+     */
+    private class KeyExtractor implements Function<IMessage,String>
+    {
+        @Override
+        public String apply(IMessage message)
+        {
+            return DCS_KEY;
+        }
+    }
+}

src/main/java/io/github/dsheirer/module/decode/dmr/DMRDecoder.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
@@ -84,6 +84,20 @@ public class DMRDecoder extends FeedbackDecoder implements ISourceEventListener,
         setSampleRate(25000.0);
     }
 
+    @Override
+    public void start()
+    {
+        super.start();
+        mQPSKDemodulator.start();
+    }
+
+    @Override
+    public void stop()
+    {
+        super.stop();
+        mQPSKDemodulator.stop();
+    }
+
     /**
      * DMR decoder type.
      */
@@ -318,22 +332,4 @@ public class DMRDecoder extends FeedbackDecoder implements ISourceEventListener,
     {
         return DMRDecoder.this;
     }
-
-    /**
-     * Starts the decoder
-     */
-    @Override
-    public void start()
-    {
-        //No-op
-    }
-
-    /**
-     * Stops the decoder
-     */
-    @Override
-    public void stop()
-    {
-        //No-op
-    }
 }

src/main/java/io/github/dsheirer/module/decode/dmr/DMRDecoderState.java

@@ -286,9 +286,7 @@ public class DMRDecoderState extends TimeslotDecoderState
     {
         broadcast(new DecoderStateEvent(this, Event.START, State.DATA, getTimeslot()));
 
-        DecodeEvent smsEvent = DMRDecodeEvent.builder(sms.getTimestamp())
-                .eventType(DecodeEventType.SMS)
-                .eventDescription(DecodeEventType.SMS.toString())
+        DecodeEvent smsEvent = DMRDecodeEvent.builder(DecodeEventType.SMS, sms.getTimestamp())
                 .details("MESSAGE: " + sms.getSMS())
                 .identifiers(new IdentifierCollection(sms.getIdentifiers()))
                 .timeslot(sms.getTimeslot())
@@ -312,8 +310,7 @@ public class DMRDecoderState extends TimeslotDecoderState
             mic.update(hyteraSmsPacket.getSource());
             mic.update(hyteraSmsPacket.getDestination());
 
-            DecodeEvent smsEvent = DMRDecodeEvent.builder(packet.getTimestamp())
-                    .eventDescription(DecodeEventType.SMS.name())
+            DecodeEvent smsEvent = DMRDecodeEvent.builder(DecodeEventType.SMS, packet.getTimestamp())
                     .identifiers(mic)
                     .timeslot(packet.getTimeslot())
                     .details("SMS:" + hyteraSmsPacket.getSMS())
@@ -325,8 +322,7 @@ public class DMRDecoderState extends TimeslotDecoderState
         {
             MutableIdentifierCollection mic = new MutableIdentifierCollection(packet.getIdentifiers());
 
-            DecodeEvent unknownTokenEvent = DMRDecodeEvent.builder(packet.getTimestamp())
-                    .eventDescription(DecodeEventType.UNKNOWN_PACKET.name())
+            DecodeEvent unknownTokenEvent = DMRDecodeEvent.builder(DecodeEventType.UNKNOWN_PACKET, packet.getTimestamp())
                     .identifiers(mic)
                     .timeslot(packet.getTimeslot())
                     .details("HYTERA UNK TOKEN MSG:" + hyteraUnknownPacket.getHeader().toString())
@@ -335,8 +331,7 @@ public class DMRDecoderState extends TimeslotDecoderState
         }
         else
         {
-            DecodeEvent packetEvent = DMRDecodeEvent.builder(packet.getTimestamp())
-                    .eventDescription(DecodeEventType.DATA_PACKET.name())
+            DecodeEvent packetEvent = DMRDecodeEvent.builder(DecodeEventType.DATA_PACKET, packet.getTimestamp())
                     .identifiers(getMergedIdentifierCollection(packet.getIdentifiers()))
                     .timeslot(packet.getTimeslot())
                     .details(packet.toString())
@@ -347,9 +342,8 @@ public class DMRDecoderState extends TimeslotDecoderState
             GeoPosition geoPosition = PacketUtil.extractGeoPosition(packet.getPacket());
 
             if (geoPosition != null) {
-                PlottableDecodeEvent plottableDecodeEvent = PlottableDecodeEvent.plottableBuilder(packet.getTimestamp())
+                PlottableDecodeEvent plottableDecodeEvent = PlottableDecodeEvent.plottableBuilder(DecodeEventType.GPS, packet.getTimestamp())
                         .channel(getCurrentChannel())
-                        .eventDescription(DecodeEventType.GPS.toString())
                         .identifiers(getMergedIdentifierCollection(packet.getIdentifiers()))
                         .protocol(Protocol.LRRP)
                         .location(geoPosition)
@@ -505,14 +499,8 @@ public class DMRDecoderState extends TimeslotDecoderState
             case STANDARD_ACKNOWLEDGE_RESPONSE_OUTBOUND_PAYLOAD:
                 if(csbk instanceof Acknowledge)
                 {
-                    DecodeEvent ackEvent = DMRDecodeEvent.builder(csbk.getTimestamp())
-                        .eventDescription(DecodeEventType.RESPONSE.toString())
-                        .identifiers(getMergedIdentifierCollection(csbk.getIdentifiers()))
-                        .timeslot(csbk.getTimeslot())
-                        .details(((Acknowledge)csbk).getReason().toString())
-                        .build();
-
-                    broadcast(ackEvent);
+                    broadcast(getDecodeEvent(csbk, DecodeEventType.RESPONSE,
+                            ((Acknowledge) csbk).getReason().toString()));
                 }
                 broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.ACTIVE, getTimeslot()));
                 break;
@@ -520,14 +508,8 @@ public class DMRDecoderState extends TimeslotDecoderState
             case STANDARD_ACKNOWLEDGE_RESPONSE_OUTBOUND_TSCC:
                 if(csbk instanceof Acknowledge)
                 {
-                    DecodeEvent ackEvent = DMRDecodeEvent.builder(csbk.getTimestamp())
-                        .eventDescription(DecodeEventType.RESPONSE.toString())
-                        .identifiers(getMergedIdentifierCollection(csbk.getIdentifiers()))
-                        .timeslot(csbk.getTimeslot())
-                        .details(((Acknowledge)csbk).getReason().toString())
-                        .build();
-
-                    broadcast(ackEvent);
+                    broadcast(getDecodeEvent(csbk, DecodeEventType.RESPONSE,
+                            ((Acknowledge) csbk).getReason().toString()));
                 }
                 broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.CONTROL, getTimeslot()));
                 break;
@@ -537,33 +519,16 @@ public class DMRDecoderState extends TimeslotDecoderState
                     switch(((Ahoy)csbk).getServiceKind())
                     {
                         case AUTHENTICATE_REGISTER_RADIO_CHECK_SERVICE:
-                            DecodeEvent registerEvent = DMRDecodeEvent.builder(csbk.getTimestamp())
-                                .eventDescription(DecodeEventType.COMMAND.toString())
-                                .identifiers(getMergedIdentifierCollection(csbk.getIdentifiers()))
-                                .timeslot(csbk.getTimeslot())
-                                .details(DecodeEventType.REGISTER.toString())
-                                .build();
-                            broadcast(registerEvent);
+                            broadcast(getDecodeEvent(csbk, DecodeEventType.COMMAND, DecodeEventType.REGISTER.toString()));
                             break;
                         case CANCEL_CALL_SERVICE:
-                            DecodeEvent cancelEvent = DMRDecodeEvent.builder(csbk.getTimestamp())
-                                .eventDescription(DecodeEventType.COMMAND.toString())
-                                .identifiers(getMergedIdentifierCollection(csbk.getIdentifiers()))
-                                .timeslot(csbk.getTimeslot())
-                                .details("CANCEL CALL")
-                                .build();
-                            broadcast(cancelEvent);
+                            broadcast(getDecodeEvent(csbk, DecodeEventType.COMMAND, "CANCEL CALL"));
                             break;
                         case SUPPLEMENTARY_SERVICE:
                             if(csbk instanceof StunReviveKill)
                             {
-                                DecodeEvent stunEvent = DMRDecodeEvent.builder(csbk.getTimestamp())
-                                    .eventDescription(DecodeEventType.COMMAND.toString())
-                                    .identifiers(getMergedIdentifierCollection(csbk.getIdentifiers()))
-                                    .timeslot(csbk.getTimeslot())
-                                    .details(((StunReviveKill)csbk).getCommand() + " RADIO")
-                                    .build();
-                                broadcast(stunEvent);
+                                broadcast(getDecodeEvent(csbk, DecodeEventType.COMMAND,
+                                        ((StunReviveKill)csbk).getCommand() + " RADIO"));
                             }
                             break;
                         case FULL_DUPLEX_MS_TO_MS_PACKET_CALL_SERVICE:
@@ -577,15 +542,9 @@ public class DMRDecoderState extends TimeslotDecoderState
                             if(csbk instanceof ServiceRadioCheck)
                             {
                                 ServiceRadioCheck src = (ServiceRadioCheck)csbk;
-
-                                DecodeEvent checkEvent = DMRDecodeEvent.builder(csbk.getTimestamp())
-                                    .eventDescription(DecodeEventType.RADIO_CHECK.toString())
-                                    .identifiers(getMergedIdentifierCollection(csbk.getIdentifiers()))
-                                    .timeslot(csbk.getTimeslot())
-                                    .details(src.getServiceDescription() + " SERVICE FOR " +
-                                        (src.isTalkgroupTarget() ? "TALKGROUP" : "RADIO"))
-                                    .build();
-                                broadcast(checkEvent);
+                                broadcast(getDecodeEvent(csbk, DecodeEventType.RADIO_CHECK,
+                                        src.getServiceDescription() + " SERVICE FOR " +
+                                        (src.isTalkgroupTarget() ? "TALKGROUP" : "RADIO")));
                             }
                             break;
                     }
@@ -599,14 +558,7 @@ public class DMRDecoderState extends TimeslotDecoderState
 
                     if(aloha.hasRadioIdentifier())
                     {
-                        DecodeEvent ackEvent = DMRDecodeEvent.builder(csbk.getTimestamp())
-                            .eventDescription(DecodeEventType.RESPONSE.toString())
-                            .identifiers(getMergedIdentifierCollection(csbk.getIdentifiers()))
-                            .timeslot(csbk.getTimeslot())
-                            .details("Aloha Acknowledge")
-                            .build();
-
-                        broadcast(ackEvent);
+                        broadcast(getDecodeEvent(csbk, DecodeEventType.RESPONSE, "Aloha Acknowledge"));
                         resetState();
                     }
                 }
@@ -618,24 +570,13 @@ public class DMRDecoderState extends TimeslotDecoderState
                     switch(((Announcement)csbk).getAnnouncementType())
                     {
                         case MASS_REGISTRATION:
-                            DecodeEvent massEvent = DMRDecodeEvent.builder(csbk.getTimestamp())
-                                .eventDescription(DecodeEventType.REGISTER.toString())
-                                .identifiers(getMergedIdentifierCollection(csbk.getIdentifiers()))
-                                .timeslot(csbk.getTimeslot())
-                                .details("MASS REGISTRATION")
-                                .build();
-                            broadcast(massEvent);
+                            broadcast(getDecodeEvent(csbk, DecodeEventType.REGISTER, "MASS REGISTRATION"));
                             break;
                         case VOTE_NOW_ADVICE:
                             if(csbk instanceof VoteNowAdvice)
                             {
-                                DecodeEvent voteEvent = DMRDecodeEvent.builder(csbk.getTimestamp())
-                                    .eventDescription(DecodeEventType.COMMAND.toString())
-                                    .identifiers(getMergedIdentifierCollection(csbk.getIdentifiers()))
-                                    .timeslot(csbk.getTimeslot())
-                                    .details("VOTE NOW FOR " + ((VoteNowAdvice)csbk).getVotedSystemIdentityCode())
-                                    .build();
-                                broadcast(voteEvent);
+                                broadcast(getDecodeEvent(csbk, DecodeEventType.COMMAND,
+                                        "VOTE NOW FOR " + ((VoteNowAdvice)csbk).getVotedSystemIdentityCode()));
                             }
                             break;
                     }
@@ -653,13 +594,8 @@ public class DMRDecoderState extends TimeslotDecoderState
             case STANDARD_PROTECT:
                 if(csbk instanceof Protect)
                 {
-                    DecodeEvent protectEvent = DMRDecodeEvent.builder(csbk.getTimestamp())
-                        .eventDescription(DecodeEventType.COMMAND.toString())
-                        .identifiers(getMergedIdentifierCollection(csbk.getIdentifiers()))
-                        .timeslot(csbk.getTimeslot())
-                        .details("PROTECT: " + ((Protect)csbk).getProtectKind())
-                        .build();
-                    broadcast(protectEvent);
+                    broadcast(getDecodeEvent(csbk, DecodeEventType.COMMAND,
+                            "PROTECT: " + ((Protect)csbk).getProtectKind()));
                 }
                 broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.CALL, getTimeslot()));
                 break;
@@ -714,13 +650,7 @@ public class DMRDecoderState extends TimeslotDecoderState
 
                         if(isStale(event, csbk.getTimestamp(), csbk.getIdentifiers()))
                         {
-                            event = DMRDecodeEvent.builder(csbk.getTimestamp())
-                                .channel(channel)
-                                .details(csbk.getOpcode().getLabel())
-                                .eventDescription(DecodeEventType.DATA_CALL.toString())
-                                .identifiers(mergedIdentifiers)
-                                .timeslot(channel.getTimeslot())
-                                .build();
+                            event = getDecodeEvent(csbk, DecodeEventType.DATA_CALL, channel, mergedIdentifiers);
                             mDetectedCallEventsMap.put(channel.getLogicalSlotNumber(), event);
                         }
                         else
@@ -753,13 +683,7 @@ public class DMRDecoderState extends TimeslotDecoderState
 
                         if(isStale(event, csbk.getTimestamp(), csbk.getIdentifiers()))
                         {
-                            event = DMRDecodeEvent.builder(csbk.getTimestamp())
-                                .channel(channel)
-                                .details(csbk.getOpcode().getLabel())
-                                .eventDescription(DecodeEventType.CALL_GROUP.toString())
-                                .identifiers(mergedIdentifiers)
-                                .timeslot(channel.getTimeslot())
-                                .build();
+                            event = getDecodeEvent(csbk, DecodeEventType.CALL_GROUP, channel, mergedIdentifiers);
                             mDetectedCallEventsMap.put(channel.getLogicalSlotNumber(), event);
                         }
                         else
@@ -791,13 +715,7 @@ public class DMRDecoderState extends TimeslotDecoderState
 
                         if(isStale(event, csbk.getTimestamp(), csbk.getIdentifiers()))
                         {
-                            event = DMRDecodeEvent.builder(csbk.getTimestamp())
-                                .channel(channel)
-                                .details(csbk.getOpcode().getLabel())
-                                .eventDescription(DecodeEventType.CALL_UNIT_TO_UNIT.toString())
-                                .identifiers(mergedIdentifiers)
-                                .timeslot(channel.getTimeslot())
-                                .build();
+                            event = getDecodeEvent(csbk, DecodeEventType.CALL_UNIT_TO_UNIT, channel, mergedIdentifiers);
                             mDetectedCallEventsMap.put(channel.getLogicalSlotNumber(), event);
                         }
                         else
@@ -817,15 +735,7 @@ public class DMRDecoderState extends TimeslotDecoderState
 
                     if(cmAloha.hasRadioIdentifier())
                     {
-                        DecodeEvent ackEvent = DMRDecodeEvent.builder(csbk.getTimestamp())
-                            .eventDescription(DecodeEventType.RESPONSE.toString())
-                            .identifiers(getMergedIdentifierCollection(csbk.getIdentifiers()))
-                            .timeslot(csbk.getTimeslot())
-                            .details("Aloha Acknowledge")
-                            .build();
-
-                        broadcast(ackEvent);
-
+                        broadcast(getDecodeEvent(csbk, DecodeEventType.RESPONSE, "Aloha Acknowledge"));
                         resetState();
                     }
                 }
@@ -850,13 +760,7 @@ public class DMRDecoderState extends TimeslotDecoderState
 
                         if(isStale(event, csbk.getTimestamp(), csbk.getIdentifiers()))
                         {
-                            event = DMRDecodeEvent.builder(csbk.getTimestamp())
-                                .channel(channel)
-                                .details(csbk.getOpcode().getLabel())
-                                .eventDescription(DecodeEventType.DATA_CALL.toString())
-                                .identifiers(mergedIdentifiers)
-                                .timeslot(channel.getTimeslot())
-                                .build();
+                            event = getDecodeEvent(csbk, DecodeEventType.DATA_CALL, channel, mergedIdentifiers);
                             mDetectedCallEventsMap.put(channel.getLogicalSlotNumber(), event);
                         }
                         else
@@ -871,9 +775,8 @@ public class DMRDecoderState extends TimeslotDecoderState
                 broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.CONTROL, getTimeslot()));
                 break;
             case MOTOROLA_CONPLUS_REGISTRATION_REQUEST:
-                DecodeEvent event = DMRDecodeEvent.builder(csbk.getTimestamp())
+                DecodeEvent event = DMRDecodeEvent.builder(DecodeEventType.REQUEST, csbk.getTimestamp())
                     .details("Registration Request")
-                    .eventDescription(DecodeEventType.REGISTER.toString())
                     .identifiers(getMergedIdentifierCollection(csbk.getIdentifiers()))
                     .timeslot(csbk.getTimeslot())
                     .build();
@@ -881,9 +784,8 @@ public class DMRDecoderState extends TimeslotDecoderState
                 broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.CONTROL, getTimeslot()));
                 break;
             case MOTOROLA_CONPLUS_REGISTRATION_RESPONSE:
-                DecodeEvent regRespEvent = DMRDecodeEvent.builder(csbk.getTimestamp())
+                DecodeEvent regRespEvent = DMRDecodeEvent.builder(DecodeEventType.RESPONSE, csbk.getTimestamp())
                     .details("Registration Response")
-                    .eventDescription(DecodeEventType.REGISTER.toString())
                     .identifiers(getMergedIdentifierCollection(csbk.getIdentifiers()))
                     .timeslot(csbk.getTimeslot())
                     .build();
@@ -909,13 +811,7 @@ public class DMRDecoderState extends TimeslotDecoderState
 
                         if(isStale(detectedEvent, csbk.getTimestamp(), csbk.getIdentifiers()))
                         {
-                            detectedEvent = DMRDecodeEvent.builder(csbk.getTimestamp())
-                                .channel(channel)
-                                .details(csbk.getOpcode().getLabel())
-                                .eventDescription(DecodeEventType.CALL_GROUP.toString())
-                                .identifiers(mergedIdentifiers)
-                                .timeslot(channel.getTimeslot())
-                                .build();
+                            detectedEvent = getDecodeEvent(csbk, DecodeEventType.CALL_GROUP, channel, mergedIdentifiers);
                             mDetectedCallEventsMap.put(channel.getLogicalSlotNumber(), detectedEvent);
                         }
                         else
@@ -930,9 +826,8 @@ public class DMRDecoderState extends TimeslotDecoderState
                 broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.CONTROL, getTimeslot()));
                 break;
             case MOTOROLA_CONPLUS_TALKGROUP_AFFILIATION:
-                DecodeEvent affiliateEvent = DMRDecodeEvent.builder(csbk.getTimestamp())
+                DecodeEvent affiliateEvent = DMRDecodeEvent.builder(DecodeEventType.AFFILIATE, csbk.getTimestamp())
                     .details("TALKGROUP AFFILIATION")
-                    .eventDescription(DecodeEventType.AFFILIATE.toString())
                     .identifiers(getMergedIdentifierCollection(csbk.getIdentifiers()))
                     .timeslot(csbk.getTimeslot())
                     .build();
@@ -945,6 +840,23 @@ public class DMRDecoderState extends TimeslotDecoderState
         }
     }
 
+    private DecodeEvent getDecodeEvent(CSBKMessage csbk, DecodeEventType decodeEventType, DMRChannel channel, IdentifierCollection mergedIdentifiers) {
+        return DMRDecodeEvent.builder(decodeEventType, csbk.getTimestamp())
+                .channel(channel)
+                .details(csbk.getOpcode().getLabel())
+                .identifiers(mergedIdentifiers)
+                .timeslot(channel.getTimeslot())
+                .build();
+    }
+
+    private DecodeEvent getDecodeEvent(CSBKMessage csbk, DecodeEventType decodeEventType, String details) {
+        return DMRDecodeEvent.builder(decodeEventType, csbk.getTimestamp())
+                .identifiers(getMergedIdentifierCollection(csbk.getIdentifiers()))
+                .timeslot(csbk.getTimeslot())
+                .details(details)
+                .build();
+    }
+
     /**
      * Creates a copy of the current identifier collection, removes any USER class identifiers and loads the identifiers
      * argument values into the collection.
@@ -1191,8 +1103,7 @@ public class DMRDecoderState extends TimeslotDecoderState
                     MutableIdentifierCollection ic = new MutableIdentifierCollection(getIdentifierCollection().getIdentifiers());
                     ic.update(gpsInformation.getGPSLocation());
 
-                    DecodeEvent gpsEvent = DMRDecodeEvent.builder(message.getTimestamp())
-                        .eventDescription(DecodeEventType.GPS.toString())
+                    DecodeEvent gpsEvent = DMRDecodeEvent.builder(DecodeEventType.GPS, message.getTimestamp())
                         .identifiers(ic)
                         .timeslot(message.getTimeslot())
                         .details("LOCATION:" + gpsInformation.getGPSLocation())
@@ -1223,9 +1134,8 @@ public class DMRDecoderState extends TimeslotDecoderState
 
         if(mCurrentCallEvent == null)
         {
-            mCurrentCallEvent = DMRDecodeEvent.builder(timestamp)
+            mCurrentCallEvent = DMRDecodeEvent.builder(type, timestamp)
                 .channel(getCurrentChannel())
-                .eventDescription(type.toString())
                 .details(details)
                 .identifiers(getIdentifierCollection().copyOf())
                 .build();
@@ -1236,7 +1146,6 @@ public class DMRDecoderState extends TimeslotDecoderState
         {
             if(type != DecodeEventType.CALL)
             {
-                mCurrentCallEvent.setEventDescription(type.toString());
                 mCurrentCallEvent.setDetails(details);
             }
 

src/main/java/io/github/dsheirer/module/decode/dmr/DMRTrafficChannelManager.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
@@ -55,9 +55,6 @@ import io.github.dsheirer.source.config.SourceConfigTuner;
 import io.github.dsheirer.source.config.SourceConfigTunerMultipleFrequency;
 import io.github.dsheirer.source.tuner.channel.rotation.DisableChannelRotationMonitorRequest;
 import io.github.dsheirer.source.tuner.channel.rotation.FrequencyLockChangeRequest;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -66,6 +63,8 @@ import java.util.Objects;
 import java.util.Queue;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentLinkedQueue;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * Monitors channel grant and channel grant update messages to allocate traffic channels to capture
@@ -165,7 +164,7 @@ public class DMRTrafficChannelManager extends TrafficChannelManager implements I
                 {
                     for(int x = 0; x < maxTrafficChannels; x++)
                     {
-                        Channel trafficChannel = new Channel("TRAFFIC", ChannelType.TRAFFIC);
+                        Channel trafficChannel = new Channel("T-" + mParentChannel.getName(), ChannelType.TRAFFIC);
                         trafficChannel.setAliasListName(mParentChannel.getAliasListName());
                         trafficChannel.setSystem(mParentChannel.getSystem());
                         trafficChannel.setSite(mParentChannel.getSite());
@@ -326,12 +325,12 @@ public class DMRTrafficChannelManager extends TrafficChannelManager implements I
         int lsn = channel.getLogicalSlotNumber();
 
         DMRChannelGrantEvent event = mLSNGrantEventMap.get(lsn);
+        DecodeEventType decodeEventType = getEventType(opcode, identifierCollection, encrypted);
 
         if(isStale(event, timestamp, identifierCollection)) //Create new event
         {
-            event = DMRChannelGrantEvent.channelGrantBuilder(timestamp)
+            event = DMRChannelGrantEvent.channelGrantBuilder(decodeEventType, timestamp)
                 .channel(channel)
-                .eventDescription(getEventType(opcode, identifierCollection, encrypted).toString())
                 .details("CHANNEL GRANT" + (encrypted ? " ENCRYPTED" : ""))
                 .identifiers(identifierCollection)
                 .build();
@@ -350,10 +349,9 @@ public class DMRTrafficChannelManager extends TrafficChannelManager implements I
                 {
                     event.end(timestamp);
 
-                    event = DMRChannelGrantEvent.channelGrantBuilder(timestamp)
+                    event = DMRChannelGrantEvent.channelGrantBuilder(decodeEventType, timestamp)
                         .channel(channel)
-                        .eventDescription(getEventType(opcode, identifierCollection, encrypted).toString() + " - Continue")
-                        .details("CHANNEL GRANT" + (encrypted ? " ENCRYPTED" : ""))
+                        .details("CONTINUE - CHANNEL GRANT" + (encrypted ? " ENCRYPTED" : ""))
                         .identifiers(identifierCollection)
                         .build();
 
@@ -390,15 +388,6 @@ public class DMRTrafficChannelManager extends TrafficChannelManager implements I
         {
             if(mIgnoreDataCalls && opcode.isDataChannelGrantOpcode())
             {
-                if(event.getEventDescription() == null)
-                {
-                    event.setEventDescription(getEventType(opcode, identifierCollection, encrypted) + IGNORED);
-                }
-                else if(!event.getEventDescription().endsWith(IGNORED))
-                {
-                    event.setEventDescription(event.getEventDescription() + IGNORED);
-                }
-
                 if(event.getDetails() == null)
                 {
                     event.setDetails(DATA_CALL_IGNORED);

src/main/java/io/github/dsheirer/module/decode/dmr/event/DMRChannelGrantEvent.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
@@ -15,12 +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.module.decode.dmr.event;
 
 import io.github.dsheirer.identifier.IdentifierCollection;
 import io.github.dsheirer.module.decode.dmr.channel.DMRChannel;
+import io.github.dsheirer.module.decode.event.DecodeEventType;
 
 /**
  * DMR Channel Grant Event.
@@ -33,11 +33,12 @@ public class DMRChannelGrantEvent extends DMRDecodeEvent
 
     /**
      * Constructs an instance
+     * @param decodeEventType for the event
      * @param timestamp for the event
      */
-    public DMRChannelGrantEvent(long timestamp)
+    public DMRChannelGrantEvent(DecodeEventType decodeEventType, long timestamp)
     {
-        super(timestamp);
+        super(decodeEventType, timestamp);
     }
 
     /**
@@ -62,9 +63,9 @@ public class DMRChannelGrantEvent extends DMRDecodeEvent
      * @param timeStart for the event
      * @return builder
      */
-    public static DMRChannelGrantDecodeEventBuilder channelGrantBuilder(long timeStart)
+    public static DMRChannelGrantDecodeEventBuilder channelGrantBuilder(DecodeEventType decodeEventType, long timeStart)
     {
-        return new DMRChannelGrantDecodeEventBuilder(timeStart);
+        return new DMRChannelGrantDecodeEventBuilder(decodeEventType, timeStart);
     }
 
     /**
@@ -74,7 +75,7 @@ public class DMRChannelGrantEvent extends DMRDecodeEvent
     {
         protected long mTimeStart;
         protected long mDuration;
-        protected String mEventDescription;
+        protected DecodeEventType mDecodeEventType;
         protected IdentifierCollection mIdentifierCollection;
         protected DMRChannel mChannel;
         protected String mDetails;
@@ -85,8 +86,9 @@ public class DMRChannelGrantEvent extends DMRDecodeEvent
          *
          * @param timeStart
          */
-        public DMRChannelGrantDecodeEventBuilder(long timeStart)
+        public DMRChannelGrantDecodeEventBuilder(DecodeEventType decodeEventType, long timeStart)
         {
+            mDecodeEventType = decodeEventType;
             mTimeStart = timeStart;
         }
 
@@ -121,7 +123,7 @@ public class DMRChannelGrantEvent extends DMRDecodeEvent
 
         /**
          * Sets the channel descriptor for this event
-         * @param channelDescriptor
+         * @param channel
          */
         public DMRChannelGrantDecodeEventBuilder channel(DMRChannel channel)
         {
@@ -129,16 +131,6 @@ public class DMRChannelGrantEvent extends DMRDecodeEvent
             return this;
         }
 
-        /**
-         * Sets the event description text
-         * @param description of the event
-         */
-        public DMRChannelGrantDecodeEventBuilder eventDescription(String description)
-        {
-            mEventDescription = description;
-            return this;
-        }
-
         /**
          * Sets the identifier collection.
          * @param identifierCollection containing optional identifiers like TO, FROM, frequency and
@@ -165,12 +157,11 @@ public class DMRChannelGrantEvent extends DMRDecodeEvent
          */
         public DMRChannelGrantEvent build()
         {
-            DMRChannelGrantEvent decodeEvent = new DMRChannelGrantEvent(mTimeStart);
+            DMRChannelGrantEvent decodeEvent = new DMRChannelGrantEvent(mDecodeEventType, mTimeStart);
             decodeEvent.setChannelDescriptor(mChannel);
             decodeEvent.setTimeslot(mChannel.getTimeslot());
             decodeEvent.setDetails(mDetails);
             decodeEvent.setDuration(mDuration);
-            decodeEvent.setEventDescription(mEventDescription);
             decodeEvent.setIdentifierCollection(mIdentifierCollection);
             return decodeEvent;
         }

src/main/java/io/github/dsheirer/module/decode/dmr/event/DMRDecodeEvent.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
@@ -15,12 +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.module.decode.dmr.event;
 
 import io.github.dsheirer.module.decode.event.DecodeEvent;
+import io.github.dsheirer.module.decode.event.DecodeEventType;
 import io.github.dsheirer.protocol.Protocol;
 
 /**
@@ -32,9 +32,9 @@ public class DMRDecodeEvent extends DecodeEvent
      * Constucts a decode event
      * @param start
      */
-    public DMRDecodeEvent(long start)
+    public DMRDecodeEvent(DecodeEventType decodeEventType, long start)
     {
-        super(start);
+        super(decodeEventType, start);
         setProtocol(Protocol.DMR);
     }
 
@@ -43,9 +43,9 @@ public class DMRDecodeEvent extends DecodeEvent
      * @param timeStart for the event
      * @return builder
      */
-    public static DecodeEventBuilder builder(long timeStart)
+    public static DecodeEventBuilder builder(DecodeEventType decodeEventType, long timeStart)
     {
-        DecodeEventBuilder decodeEventBuilder = new DecodeEventBuilder(timeStart);
+        DecodeEventBuilder decodeEventBuilder = new DecodeEventBuilder(decodeEventType, timeStart);
         decodeEventBuilder.protocol(Protocol.DMR);
         return decodeEventBuilder;
     }

src/main/java/io/github/dsheirer/module/decode/dmr/message/data/csbk/Opcode.java

@@ -39,7 +39,7 @@ public enum Opcode
     STANDARD_CHANNEL_TIMING(Vendor.STANDARD, 7, "CHANNEL TIMING"),
     STANDARD_ALOHA(Vendor.STANDARD, 25, "ALOHA"),
     STANDARD_UNIFIED_DATA_TRANSPORT_OUTBOUND_HEADER(Vendor.STANDARD, 26, "UNIFIED DATA TRANSPORT OUTBOUND HEADER"),
-    STANDARD_UNIFIED_DATA_TRANSPORT_INBOUND_HEADER(Vendor.STANDARD, 27, "UNIFIED DATA TRANSPORT OUTBOUND HEADER"),
+    STANDARD_UNIFIED_DATA_TRANSPORT_INBOUND_HEADER(Vendor.STANDARD, 27, "UNIFIED DATA TRANSPORT INBOUND HEADER"),
     STANDARD_AHOY(Vendor.STANDARD, 28, "AHOY"),
     STANDARD_ACTIVATION(Vendor.STANDARD, 30, "ACTIVATION"),
     STANDARD_RANDOM_ACCESS_SERVICE_REQUEST(Vendor.STANDARD, 31, "RANDOM ACCESS SERVICE REQUEST"),
@@ -102,13 +102,18 @@ public enum Opcode
     HYTERA_68_XPT_PREAMBLE(Vendor.HYTERA_68, 61, "HYTERA 68 XPT PREAMBLE"),
     HYTERA_68_CSBKO_62(Vendor.HYTERA_68, 62, "HYTERA 68 CSBKO 62"),
 
-
     UNKNOWN(Vendor.UNKNOWN, -1, "UNKNOWN");
 
     private Vendor mVendor;
     private int mValue;
     private String mLabel;
 
+    /**
+     * Constructor
+     * @param vendor for the opcode
+     * @param value for the opcode
+     * @param label to display for the opcode
+     */
     Opcode(Vendor vendor, int value, String label)
     {
         mVendor = vendor;
@@ -151,19 +156,86 @@ public enum Opcode
      */
     public boolean isDataChannelGrantOpcode()
     {
-        return DATA_CHANNEL_GRANT_OPCODES.contains(this);
+        return DATA_CHANNEL_GRANTS.contains(this);
     }
 
     /**
-     * Data Channel Grant opcodes
+     * Data channel grant opcodes
      */
-    public static final EnumSet<Opcode> DATA_CHANNEL_GRANT_OPCODES = EnumSet.of(
-        STANDARD_PRIVATE_DATA_CHANNEL_GRANT_MULTI_ITEM,
-        STANDARD_PRIVATE_DATA_CHANNEL_GRANT_SINGLE_ITEM,
-        STANDARD_DUPLEX_PRIVATE_DATA_CHANNEL_GRANT,
-        STANDARD_TALKGROUP_DATA_CHANNEL_GRANT_MULTI_ITEM,
-        STANDARD_TALKGROUP_DATA_CHANNEL_GRANT_SINGLE_ITEM);
+    public static final EnumSet<Opcode> DATA_CHANNEL_GRANTS = EnumSet.of(STANDARD_PRIVATE_DATA_CHANNEL_GRANT_MULTI_ITEM,
+        STANDARD_PRIVATE_DATA_CHANNEL_GRANT_SINGLE_ITEM, STANDARD_DUPLEX_PRIVATE_DATA_CHANNEL_GRANT,
+        STANDARD_TALKGROUP_DATA_CHANNEL_GRANT_MULTI_ITEM, STANDARD_TALKGROUP_DATA_CHANNEL_GRANT_SINGLE_ITEM);
 
+    /**
+     * Data opcodes
+     */
+    public static final EnumSet<Opcode> DATA_OPCODES = EnumSet.of(STANDARD_UNIFIED_DATA_TRANSPORT_OUTBOUND_HEADER,
+            STANDARD_UNIFIED_DATA_TRANSPORT_INBOUND_HEADER, STANDARD_UNIFIED_DATA_TRANSPORT_FOR_DGNA_OUTBOUND_HEADER,
+            STANDARD_UNIFIED_DATA_TRANSPORT_FOR_DGNA_INBOUND_HEADER, STANDARD_PREAMBLE);
+
+    /**
+     * Mobile request and response opcodes
+     */
+    public static final EnumSet<Opcode> MOBILE_REQUEST_RESPONSE = EnumSet.of(STANDARD_UNIT_TO_UNIT_VOICE_SERVICE_REQUEST,
+            STANDARD_RANDOM_ACCESS_SERVICE_REQUEST);
+
+    /**
+     * Network request and response and announcement opcodes
+     */
+    public static final EnumSet<Opcode> NETWORK_REQUEST_RESPONSE = EnumSet.of(STANDARD_FEATURE_NOT_SUPPORTED,
+            STANDARD_UNIT_TO_UNIT_VOICE_SERVICE_RESPONSE, STANDARD_AHOY, STANDARD_ACKNOWLEDGE_RESPONSE_OUTBOUND_TSCC,
+            STANDARD_ACKNOWLEDGE_RESPONSE_INBOUND_TSCC, STANDARD_ACKNOWLEDGE_RESPONSE_OUTBOUND_PAYLOAD,
+            STANDARD_ACKNOWLEDGE_RESPONSE_INBOUND_PAYLOAD, STANDARD_NEGATIVE_ACKNOWLEDGE_RESPONSE, STANDARD_CLEAR,
+            STANDARD_MOVE_TSCC, STANDARD_CHANNEL_TIMING,
+            STANDARD_ALOHA, STANDARD_ACTIVATION, STANDARD_ANNOUNCEMENT, STANDARD_MAINTENANCE, STANDARD_PROTECT);
+
+    /**
+     * Voice channel grant opcodes
+     */
+    public static final EnumSet<Opcode> VOICE_CHANNEL_GRANTS = EnumSet.of(STANDARD_PRIVATE_VOICE_CHANNEL_GRANT,
+            STANDARD_TALKGROUP_VOICE_CHANNEL_GRANT, STANDARD_BROADCAST_TALKGROUP_VOICE_CHANNEL_GRANT,
+            STANDARD_DUPLEX_PRIVATE_VOICE_CHANNEL_GRANT);
+
+    /**
+     * Hytera opcodes
+     */
+    public static final EnumSet<Opcode> HYTERA = EnumSet.of(HYTERA_08_ACKNOWLEDGE, HYTERA_08_ANNOUNCEMENT,
+            HYTERA_08_CSBKO_44, HYTERA_08_CSBKO_47, HYTERA_68_XPT_SITE_STATE, HYTERA_68_ALOHA,
+            HYTERA_68_ACKNOWLEDGE, HYTERA_68_ANNOUNCEMENT, HYTERA_68_XPT_PREAMBLE, HYTERA_68_CSBKO_62);
+
+    /**
+     * Motorola Capacity Max opcodes
+     */
+    public static final EnumSet<Opcode> MOTOROLA_CAPACITY_MAX = EnumSet.of(MOTOROLA_CAPMAX_ALOHA);
+
+    /**
+     * Motorola Capacity Plus opcodes
+     */
+    public static final EnumSet<Opcode> MOTOROLA_CAPACITY_PLUS = EnumSet.of(MOTOROLA_CAPPLUS_CALL_ALERT,
+            MOTOROLA_CAPPLUS_CALL_ALERT_ACK, MOTOROLA_CAPPLUS_DATA_WINDOW_ANNOUNCEMENT,
+            MOTOROLA_CAPPLUS_DATA_WINDOW_GRANT, MOTOROLA_CAPPLUS_NEIGHBOR_REPORT, MOTOROLA_CAPPLUS_CSBKO_60,
+            MOTOROLA_CAPPLUS_PREAMBLE, MOTOROLA_CAPPLUS_SITE_STATUS);
+
+    /**
+     * Motorola Connect Plus opcodes
+     */
+    public static final EnumSet<Opcode> MOTOROLA_CONNECT_PLUS = EnumSet.of(MOTOROLA_CONPLUS_NEIGHBOR_REPORT,
+            MOTOROLA_CONPLUS_VOICE_CHANNEL_USER, MOTOROLA_CONPLUS_DATA_CHANNEL_GRANT, MOTOROLA_CONPLUS_CSBKO_10,
+            MOTOROLA_CONPLUS_TERMINATE_CHANNEL_GRANT, MOTOROLA_CONPLUS_CSBKO_16, MOTOROLA_CONPLUS_REGISTRATION_REQUEST,
+            MOTOROLA_CONPLUS_REGISTRATION_RESPONSE, MOTOROLA_CONPLUS_TALKGROUP_AFFILIATION,
+            MOTOROLA_CONPLUS_DATA_WINDOW_ANNOUNCEMENT, MOTOROLA_CONPLUS_DATA_WINDOW_GRANT);
+
+    /**
+     * Indicates if the opcode is included in one of the enumset groupings above
+     * @return
+     */
+    public boolean isGrouped()
+    {
+        return DATA_CHANNEL_GRANTS.contains(this) || DATA_OPCODES.contains(this) ||
+                MOBILE_REQUEST_RESPONSE.contains(this) || NETWORK_REQUEST_RESPONSE.contains(this) ||
+                VOICE_CHANNEL_GRANTS.contains(this) || HYTERA.contains(this) || MOTOROLA_CAPACITY_MAX.contains(this) ||
+                MOTOROLA_CAPACITY_PLUS.contains(this) || MOTOROLA_CONNECT_PLUS.contains(this);
+    }
 
     /**
      * Lookup map of vendors and opcode value to opcodes

src/main/java/io/github/dsheirer/module/decode/dmr/message/data/lc/LCOpcode.java

@@ -67,14 +67,14 @@ public enum LCOpcode
     //CAP+ SLCO 15 = Rest Channel https://forums.radioreference.com/threads/understanding-capacity-plus-trunking.209318/page-7
     SHORT_CAPACITY_PLUS_REST_CHANNEL_NOTIFICATION(Vendor.MOTOROLA_CAPACITY_PLUS, false,15, "REST CHANNEL NOTIFICATION"),
 
-    SHORT_STANDARD_XPT_CHANNEL(Vendor.STANDARD, false, 8, "HYTERA XPT CHANNEL"),
+    SHORT_STANDARD_XPT_CHANNEL(Vendor.STANDARD, false, 8, "STANDARD XPT CHANNEL"),
     SHORT_HYTERA_XPT_CHANNEL(Vendor.HYTERA_68, false, 8, "HYTERA XPT CHANNEL"),
 
     SHORT_CONNECT_PLUS_TRAFFIC_CHANNEL(Vendor.STANDARD, false, 9, "TRAFFIC CHANNEL INFO"),
     SHORT_CONNECT_PLUS_CONTROL_CHANNEL(Vendor.STANDARD, false, 10, "CONTROL CHANNEL INFO"),
 
 
-    SHORT_STANDARD_UNKNOWN(Vendor.STANDARD,false,-1, "SHORT UNKNOWN");
+    SHORT_STANDARD_UNKNOWN(Vendor.STANDARD,false,-1, "UNKNOWN");
 
     private static final EnumSet<LCOpcode> TALKER_ALIAS_OPCODES = EnumSet.of(FULL_STANDARD_TALKER_ALIAS_HEADER,
             FULL_STANDARD_TALKER_ALIAS_BLOCK_1, FULL_STANDARD_TALKER_ALIAS_BLOCK_2, FULL_STANDARD_TALKER_ALIAS_BLOCK_3);

src/main/java/io/github/dsheirer/module/decode/dmr/message/data/packet/PacketSequenceMessageFactory.java

@@ -63,7 +63,6 @@ public class PacketSequenceMessageFactory
             if(packetSequence.hasPacketSequenceHeader())
             {
                 PacketSequenceHeader primaryHeader = packetSequence.getPacketSequenceHeader();
-                boolean confirmed = primaryHeader.isConfirmedData();
                 CorrectedBinaryMessage packet = getPacket(packetSequence, primaryHeader.isConfirmedData());
 
                 if(packet != null)

src/main/java/io/github/dsheirer/module/decode/dmr/message/filter/ControlMessageFilter.java

@@ -0,0 +1,74 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.dmr.message.filter;
+
+import io.github.dsheirer.filter.Filter;
+import io.github.dsheirer.filter.FilterElement;
+import io.github.dsheirer.message.IMessage;
+import io.github.dsheirer.module.decode.dmr.message.data.csbk.CSBKMessage;
+import io.github.dsheirer.module.decode.dmr.message.data.csbk.Opcode;
+import java.util.Collection;
+import java.util.function.Function;
+
+/**
+ * Filter for opcode based control (CSBK) messages.
+ */
+public class ControlMessageFilter extends Filter<IMessage, Opcode>
+{
+    private KeyExtractor mKeyExtractor = new KeyExtractor();
+
+    /**
+     * Constructs an instance
+     * @param name of this control message filter
+     * @param opcodes to use with this filter
+     */
+    public ControlMessageFilter(String name, Collection<Opcode> opcodes)
+    {
+        super(name);
+
+        for(Opcode opcode: opcodes)
+        {
+            add(new FilterElement<>(opcode));
+        }
+    }
+
+    @Override
+    public Function<IMessage, Opcode> getKeyExtractor()
+    {
+        return mKeyExtractor;
+    }
+
+    /**
+     * Key extractor
+     */
+    private class KeyExtractor implements Function<IMessage,Opcode>
+    {
+        @Override
+        public Opcode apply(IMessage message)
+        {
+            if(message instanceof CSBKMessage csbk)
+            {
+                return csbk.getOpcode();
+            }
+
+            return null;
+        }
+    }
+}

src/main/java/io/github/dsheirer/module/decode/dmr/message/filter/ControlMessageFilterSet.java

@@ -0,0 +1,68 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.dmr.message.filter;
+
+import io.github.dsheirer.filter.FilterSet;
+import io.github.dsheirer.message.IMessage;
+import io.github.dsheirer.module.decode.dmr.message.data.csbk.CSBKMessage;
+import io.github.dsheirer.module.decode.dmr.message.data.csbk.Opcode;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Filter set for DMR control (CSBK) messages using Opcodes for filter elements.
+ */
+public class ControlMessageFilterSet extends FilterSet<IMessage>
+{
+    /**
+     * Constructor
+     */
+    public ControlMessageFilterSet()
+    {
+        super("Control (CSBK) Messages");
+        addFilter(new ControlMessageFilter("Data Channel Grants", Opcode.DATA_CHANNEL_GRANTS));
+        addFilter(new ControlMessageFilter("Data-Related", Opcode.DATA_OPCODES));
+        addFilter(new ControlMessageFilter("Mobile Request/Response", Opcode.MOBILE_REQUEST_RESPONSE));
+        addFilter(new ControlMessageFilter("Network Request/Response", Opcode.NETWORK_REQUEST_RESPONSE));
+        addFilter(new ControlMessageFilter("Voice Channel Grants", Opcode.VOICE_CHANNEL_GRANTS));
+        addFilter(new ControlMessageFilter("Hytera", Opcode.HYTERA));
+        addFilter(new ControlMessageFilter("Motorola Capacity Max", Opcode.MOTOROLA_CAPACITY_MAX));
+        addFilter(new ControlMessageFilter("Motorola Capacity Plus", Opcode.MOTOROLA_CAPACITY_PLUS));
+        addFilter(new ControlMessageFilter("Motorola Connect Plus", Opcode.MOTOROLA_CONNECT_PLUS));
+
+        //Add all remaining opcodes that are not grouped into one of the above enumsets.
+        List<Opcode> otherOpcodes = new ArrayList<>();
+        for(Opcode opcode: Opcode.values())
+        {
+            if(!opcode.isGrouped())
+            {
+                otherOpcodes.add(opcode);
+            }
+        }
+
+        addFilter(new ControlMessageFilter("Other/Unknown", otherOpcodes));
+    }
+
+    @Override
+    public boolean canProcess(IMessage message)
+    {
+        return message instanceof CSBKMessage && super.canProcess(message);
+    }
+}

src/main/java/io/github/dsheirer/module/decode/dmr/message/filter/DataMessageFilter.java

@@ -0,0 +1,80 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.dmr.message.filter;
+
+import io.github.dsheirer.filter.Filter;
+import io.github.dsheirer.filter.FilterElement;
+import io.github.dsheirer.message.IMessage;
+import io.github.dsheirer.module.decode.dmr.message.data.DataMessage;
+import io.github.dsheirer.module.decode.dmr.message.data.csbk.CSBKMessage;
+import io.github.dsheirer.module.decode.dmr.message.type.DataType;
+import java.util.function.Function;
+
+/**
+ * Filter for data messages, excluding CSBK messages.
+ */
+public class DataMessageFilter extends Filter<IMessage, DataType>
+{
+    private KeyExtractor mKeyExtractor = new KeyExtractor();
+
+    /**
+     * Constructs an instance
+     *
+     * @param name of this filter
+     */
+    public DataMessageFilter()
+    {
+        super("Data Messages");
+
+        for(DataType dataType: DataType.values())
+        {
+            add(new FilterElement<>(dataType));
+        }
+    }
+
+    @Override
+    public Function<IMessage, DataType> getKeyExtractor()
+    {
+        return mKeyExtractor;
+    }
+
+    @Override
+    public boolean canProcess(IMessage message)
+    {
+        return message instanceof DataMessage && !(message instanceof CSBKMessage) && super.canProcess(message);
+    }
+
+    /**
+     * Key extractor
+     */
+    private class KeyExtractor implements Function<IMessage,DataType>
+    {
+        @Override
+        public DataType apply(IMessage message)
+        {
+            if(message instanceof DataMessage dataMessage)
+            {
+                return dataMessage.getSlotType().getDataType();
+            }
+
+            return null;
+        }
+    }
+}

src/main/java/io/github/dsheirer/module/decode/dmr/message/filter/DmrMessageFilterSet.java

@@ -0,0 +1,45 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.dmr.message.filter;
+
+import io.github.dsheirer.filter.FilterSet;
+import io.github.dsheirer.filter.SyncLossMessageFilter;
+import io.github.dsheirer.message.IMessage;
+
+/**
+ * Filter set for DMR messages
+ */
+public class DmrMessageFilterSet extends FilterSet<IMessage>
+{
+    /**
+     * Constructor
+     */
+    public DmrMessageFilterSet()
+    {
+        super("DMR Messages");
+        addFilter(new ControlMessageFilterSet());
+        addFilter(new VoiceMessageFilter());
+        addFilter(new DataMessageFilter());
+        addFilter(new DmrPacketSequenceFilter());
+        addFilter(new LinkControlMessageFilterSet());
+        addFilter(new SyncLossMessageFilter());
+        addFilter(new DmrOtherMessageFilter());
+    }
+}

src/main/java/io/github/dsheirer/module/decode/dmr/message/filter/DmrOtherMessageFilter.java

@@ -0,0 +1,73 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.dmr.message.filter;
+
+import io.github.dsheirer.filter.Filter;
+import io.github.dsheirer.filter.FilterElement;
+import io.github.dsheirer.message.IMessage;
+import io.github.dsheirer.module.decode.dmr.message.DMRMessage;
+import java.util.function.Function;
+
+/**
+ * Filter for unknown messages, meaning messages not handled by any other filter.
+ */
+public class DmrOtherMessageFilter extends Filter<IMessage,String>
+{
+    private static final String OTHER_KEY = "Other/Unknown Message";
+    private KeyExtractor mKeyExtractor = new KeyExtractor();
+
+    /**
+     * Constructor
+     */
+    public DmrOtherMessageFilter()
+    {
+        super("Other DMR messages");
+        add(new FilterElement<>(OTHER_KEY));
+    }
+
+    @Override
+    public Function<IMessage, String> getKeyExtractor()
+    {
+        return mKeyExtractor;
+    }
+
+    @Override
+    public boolean canProcess(IMessage message)
+    {
+        return message instanceof DMRMessage && super.canProcess(message);
+    }
+
+    /**
+     * Key extractor
+     */
+    private class KeyExtractor implements Function<IMessage,String>
+    {
+        @Override
+        public String apply(IMessage message)
+        {
+            if(message instanceof DMRMessage)
+            {
+                return OTHER_KEY;
+            }
+
+            return null;
+        }
+    }
+}

src/main/java/io/github/dsheirer/module/decode/dmr/message/filter/DmrPacketSequenceFilter.java

@@ -0,0 +1,106 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.dmr.message.filter;
+
+import io.github.dsheirer.filter.Filter;
+import io.github.dsheirer.message.IMessage;
+import io.github.dsheirer.module.decode.dmr.message.data.packet.DMRPacketMessage;
+import io.github.dsheirer.module.decode.dmr.message.data.packet.UDTShortMessageService;
+import io.github.dsheirer.module.decode.ip.hytera.sds.HyteraUnknownPacket;
+import io.github.dsheirer.module.decode.ip.hytera.sms.HyteraSmsPacket;
+import io.github.dsheirer.module.decode.ip.mototrbo.ars.ARSPacket;
+import io.github.dsheirer.module.decode.ip.mototrbo.lrrp.LRRPPacket;
+import io.github.dsheirer.module.decode.ip.mototrbo.xcmp.XCMPPacket;
+import java.util.function.Function;
+
+/**
+ * Filter for DMR packet sequence messages
+ */
+public class DmrPacketSequenceFilter extends Filter<IMessage,String>
+{
+    private static final String KEY_ARS = "Automatic Registration Service (ARS)";
+    private static final String KEY_HYTERA_SMS = "Hytera Short Message Service (SMS)";
+    private static final String KEY_HYTERA_UNKNOWN = "Hytera Unknown";
+    private static final String KEY_LRRP = "Location Request/Response Protocol (LRRP)";
+    private static final String KEY_UDT_SMS = "Unified Data Transport - Short Message Service";
+    private static final String KEY_XCMP = "Extensible Command Message Protocol (XCMP)";
+    private static final String KEY_UNKNOWN = "Other/Unknown";
+
+    private KeyExtractor mKeyExtractor = new KeyExtractor();
+
+    /**
+     * Constructs an instance
+     */
+    public DmrPacketSequenceFilter()
+    {
+        super("Packet Sequence Messages");
+    }
+
+    @Override
+    public boolean canProcess(IMessage message)
+    {
+        return message instanceof DMRPacketMessage && super.canProcess(message);
+    }
+
+    @Override
+    public Function<IMessage, String> getKeyExtractor()
+    {
+        return mKeyExtractor;
+    }
+
+    private class KeyExtractor implements Function<IMessage,String>
+    {
+        @Override
+        public String apply(IMessage message)
+        {
+            if(message instanceof UDTShortMessageService)
+            {
+                return KEY_UDT_SMS;
+            }
+            else if(message instanceof DMRPacketMessage packetMessage)
+            {
+                if(packetMessage.getPacket() instanceof ARSPacket)
+                {
+                    return KEY_ARS;
+                }
+                else if(packetMessage.getPacket() instanceof LRRPPacket)
+                {
+                    return KEY_LRRP;
+                }
+                else if(packetMessage.getPacket() instanceof XCMPPacket)
+                {
+                    return KEY_XCMP;
+                }
+                else if(packetMessage.getPacket() instanceof HyteraSmsPacket)
+                {
+                    return KEY_HYTERA_SMS;
+                }
+                else if(packetMessage.getPacket() instanceof HyteraUnknownPacket)
+                {
+                    return KEY_HYTERA_UNKNOWN;
+                }
+
+                //TODO: finish this
+            }
+
+            return KEY_UNKNOWN;
+        }
+    }
+}

src/main/java/io/github/dsheirer/module/decode/dmr/message/filter/LinkControlMessageFilter.java

@@ -0,0 +1,76 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.dmr.message.filter;
+
+import io.github.dsheirer.filter.Filter;
+import io.github.dsheirer.filter.FilterElement;
+import io.github.dsheirer.message.IMessage;
+import io.github.dsheirer.module.decode.dmr.message.data.lc.LCMessage;
+import io.github.dsheirer.module.decode.dmr.message.data.lc.LCOpcode;
+import java.util.Collection;
+import java.util.function.Function;
+
+/**
+ * Message filter for link control opcodes.
+ *
+ * Note: this does not include link control messages carried by data messages with embedded link control.
+ */
+public class LinkControlMessageFilter extends Filter<IMessage, LCOpcode>
+{
+    private KeyExtractor mKeyExtractor = new KeyExtractor();
+
+    /**
+     * Constructs an instance
+     *
+     * @param name of this filter
+     */
+    public LinkControlMessageFilter(String name, Collection<LCOpcode> opcodes)
+    {
+        super(name);
+
+        for(LCOpcode opcode: opcodes)
+        {
+            add(new FilterElement<>(opcode));
+        }
+    }
+
+    @Override
+    public Function<IMessage, LCOpcode> getKeyExtractor()
+    {
+        return mKeyExtractor;
+    }
+
+    /**
+     * Key extractor
+     */
+    private class KeyExtractor implements Function<IMessage,LCOpcode>
+    {
+        @Override
+        public LCOpcode apply(IMessage message)
+        {
+            if(message instanceof LCMessage lcMessage)
+            {
+                return lcMessage.getOpcode();
+            }
+
+            return null;
+        }
+    }
+}

src/main/java/io/github/dsheirer/module/decode/dmr/message/filter/LinkControlMessageFilterSet.java

@@ -0,0 +1,66 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.dmr.message.filter;
+
+import io.github.dsheirer.filter.FilterSet;
+import io.github.dsheirer.message.IMessage;
+import io.github.dsheirer.module.decode.dmr.message.data.lc.LCMessage;
+import io.github.dsheirer.module.decode.dmr.message.data.lc.LCOpcode;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Filter set for short & voice-fragment link control messages
+ *
+ * Note: this filter set does NOT work for link control messages in Data Message with Link Control.
+ */
+public class LinkControlMessageFilterSet extends FilterSet<IMessage>
+{
+    /**
+     * Constructor
+     */
+    public LinkControlMessageFilterSet()
+    {
+        super("Short/Voice-Fragment Link Control Messages");
+
+        List<LCOpcode> fullLinkControl = new ArrayList<>();
+        List<LCOpcode> shortLinkControl = new ArrayList<>();
+        for(LCOpcode opcode: LCOpcode.values())
+        {
+            if(opcode.isFull())
+            {
+                fullLinkControl.add(opcode);
+            }
+            else
+            {
+                shortLinkControl.add(opcode);
+            }
+        }
+
+        addFilter(new LinkControlMessageFilter("Full Link Control", fullLinkControl));
+        addFilter(new LinkControlMessageFilter("Short Link Control", shortLinkControl));
+    }
+
+    @Override
+    public boolean canProcess(IMessage message)
+    {
+        return message instanceof LCMessage && super.canProcess(message);
+    }
+}

src/main/java/io/github/dsheirer/module/decode/dmr/message/filter/VoiceMessageFilter.java

@@ -0,0 +1,86 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.dmr.message.filter;
+
+import io.github.dsheirer.filter.Filter;
+import io.github.dsheirer.filter.FilterElement;
+import io.github.dsheirer.message.IMessage;
+import io.github.dsheirer.module.decode.dmr.DMRSyncPattern;
+import io.github.dsheirer.module.decode.dmr.message.voice.VoiceMessage;
+import java.util.function.Function;
+
+/**
+ * Filter for voice messages
+ */
+public class VoiceMessageFilter extends Filter<IMessage, DMRSyncPattern>
+{
+    private KeyExtractor mKeyExtractor = new KeyExtractor();
+
+    /**
+     * Constructs an instance
+     */
+    public VoiceMessageFilter()
+    {
+        super("Voice Messages");
+        add(new FilterElement<>(DMRSyncPattern.BASE_STATION_VOICE));
+        add(new FilterElement<>(DMRSyncPattern.BS_VOICE_FRAME_B));
+        add(new FilterElement<>(DMRSyncPattern.BS_VOICE_FRAME_C));
+        add(new FilterElement<>(DMRSyncPattern.BS_VOICE_FRAME_D));
+        add(new FilterElement<>(DMRSyncPattern.BS_VOICE_FRAME_E));
+        add(new FilterElement<>(DMRSyncPattern.BS_VOICE_FRAME_F));
+        add(new FilterElement<>(DMRSyncPattern.MOBILE_STATION_VOICE));
+        add(new FilterElement<>(DMRSyncPattern.MS_VOICE_FRAME_B));
+        add(new FilterElement<>(DMRSyncPattern.MS_VOICE_FRAME_C));
+        add(new FilterElement<>(DMRSyncPattern.MS_VOICE_FRAME_D));
+        add(new FilterElement<>(DMRSyncPattern.MS_VOICE_FRAME_E));
+        add(new FilterElement<>(DMRSyncPattern.MS_VOICE_FRAME_F));
+        add(new FilterElement<>(DMRSyncPattern.DIRECT_MODE_VOICE_TIMESLOT_1));
+        add(new FilterElement<>(DMRSyncPattern.DIRECT_MODE_VOICE_TIMESLOT_2));
+    }
+
+    @Override
+    public boolean canProcess(IMessage message)
+    {
+        return message instanceof VoiceMessage && super.canProcess(message);
+    }
+
+    @Override
+    public Function<IMessage,DMRSyncPattern> getKeyExtractor()
+    {
+        return mKeyExtractor;
+    }
+
+    /**
+     * Key extractor
+     */
+    private class KeyExtractor implements Function<IMessage,DMRSyncPattern>
+    {
+        @Override
+        public DMRSyncPattern apply(IMessage message)
+        {
+            if(message instanceof VoiceMessage voice)
+            {
+                return voice.getSyncPattern();
+            }
+
+            return null;
+        }
+    }
+}

src/main/java/io/github/dsheirer/module/decode/dmr/message/type/DataType.java

@@ -1,6 +1,6 @@
 /*
  * *****************************************************************************
- *  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
@@ -27,18 +27,18 @@ public enum DataType
     VOICE_HEADER(1, 288, "VOICE HEADER"),
     TLC(2, 288,  "TERMINATOR"),
     CSBK(3, 288, "CSBK"),
-    MBC_HEADER(4, 288, "MBC HEADER"),
-    MBC_BLOCK(5, 276,  "MBC"),
+    MBC_HEADER(4, 288, "MULTI-BLOCK CONTROL HEADER"),
+    MBC_BLOCK(5, 276,  "MULTI-BLOCK CONTROL BLOCK"),
     DATA_HEADER(6, 288,  "DATA HEADER"),
     RATE_1_OF_2_DATA(7, 276, "RATE 1/2 PACKET"),
     RATE_3_OF_4_DATA(8, 276,  "RATE 3/4 PACKET"),
     SLOT_IDLE(9, 276, "IDLE"),
     RATE_1_DATA(10, 276,  "RATE 1/1 PACKET"),
     USB_DATA(11, 276,  "UNIFIED SINGLE BLOCK DATA"),
-    MBC_ENC_HEADER(12, 276,  "MBC ENCRYPTED HEADER"),
+    MBC_ENC_HEADER(12, 276,  "MULTI-BLOCK CONTROL ENCRYPTED HEADER"),
     DATA_ENC_HEADER(13, 276, "DATA ENCRYPTED HEADER"),
     CHANNEL_CONTROL_ENC_HEADER(14, 276,  "CONTROL CHANNEL ENCRYPTED HEADER"),
-    RESERVED_15(15, -1,  "RESERVED"),
+    RESERVED_15(15, -1,  "RESERVED 15"),
     UNKNOWN(-1, -1,  "UNKNOWN");
 
     private int mValue;

src/main/java/io/github/dsheirer/module/decode/event/ClearableHistoryModel.java

@@ -0,0 +1,125 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.event;
+
+import java.awt.EventQueue;
+import java.util.LinkedList;
+import java.util.List;
+
+import javax.swing.table.AbstractTableModel;
+
+/**
+ * AbstractTableModel implementation supporting clearable method options.
+ */
+public abstract class ClearableHistoryModel<T> extends AbstractTableModel
+{
+    public static final int DEFAULT_HISTORY_SIZE = 200;
+    private LinkedList<T> mItems = new LinkedList<>();
+    private int mHistorySize = DEFAULT_HISTORY_SIZE;
+
+    /**
+     * Access an item/row by the model index value.
+     * @param index to retrieve
+     * @return item or null
+     */
+    public T getItem(int index)
+    {
+        if(index < mItems.size())
+        {
+            return mItems.get(index);
+        }
+
+        return null;
+    }
+
+    /**
+     * Adds the item to the top of the item list and removes any tail items while the item list size exceeds the
+     * maximum history size for this model.
+     * @param item to add
+     */
+    public void add(T item)
+    {
+        mItems.addFirst(item);
+        ClearableHistoryModel.this.fireTableRowsInserted(0, 0);
+        while(mItems.size() > mHistorySize)
+        {
+            mItems.removeLast();
+            super.fireTableRowsDeleted(mItems.size() - 1, mItems.size() - 1);
+        }
+    }
+
+    /**
+     * Clears all messages from history
+     */
+    public void clear()
+    {
+        EventQueue.invokeLater(() -> {
+            mItems.clear();
+            fireTableDataChanged();
+        });
+    }
+
+    /**
+     * Clears the current messages and loads the messages argument
+     */
+    public void clearAndSet(List<T> items)
+    {
+        EventQueue.invokeLater(() -> {
+            mItems.clear();
+            fireTableDataChanged();
+            for(T item: items)
+            {
+                add(item);
+            }
+        });
+    }
+
+    /**
+     * Current history size
+     * @return history size
+     */
+    public int getHistorySize()
+    {
+        return mHistorySize;
+    }
+
+    /**
+     * Resets the history size to the default value.
+     */
+    public void resetHistorySize()
+    {
+        setHistorySize(DEFAULT_HISTORY_SIZE);
+    }
+
+    /**
+     * Sets the history size
+     * @param historySize
+     */
+    public void setHistorySize(int historySize)
+    {
+        mHistorySize = historySize;
+    }
+
+    @Override
+    public int getRowCount()
+    {
+        return mItems.size();
+    }
+}

src/main/java/io/github/dsheirer/module/decode/event/DecodeEvent.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
@@ -32,27 +32,33 @@ public class DecodeEvent implements IDecodeEvent
 {
     private long mTimeStart;
     private long mTimeEnd;
-    private String mEventDescription;
     private DecodeEventType mDecodeEventType;
     private IdentifierCollection mIdentifierCollection;
     private IChannelDescriptor mChannelDescriptor;
     private String mDetails;
     private Protocol mProtocol;
-    private Integer mTimeslot;
+    private int mTimeslot = -1;
 
-    public DecodeEvent(long start)
+    /**
+     * Constructs an instance
+     * @param decodeEventType is mandatory to support event filtering by event type.
+     * @param start time of the event.
+     */
+    public DecodeEvent(DecodeEventType decodeEventType, long start)
     {
+        mDecodeEventType = decodeEventType;
         mTimeStart = start;
     }
 
     /**
      * Creates a new decode event builder with the specified start timestamp.
+     * @param decodeEventType for the event
      * @param timeStart for the event
      * @return builder
      */
-    public static DecodeEventBuilder builder(long timeStart)
+    public static DecodeEventBuilder builder(DecodeEventType decodeEventType, long timeStart)
     {
-        return new DecodeEventBuilder(timeStart);
+        return new DecodeEventBuilder(decodeEventType, timeStart);
     }
 
     /**
@@ -115,23 +121,6 @@ public class DecodeEvent implements IDecodeEvent
         mTimeEnd = mTimeStart + duration;
     }
 
-    /**
-     * Event description
-     */
-    @Override
-    public String getEventDescription()
-    {
-        return mEventDescription;
-    }
-
-    /**
-     * Sets the event description text
-     */
-    public void setEventDescription(String description)
-    {
-        mEventDescription = description;
-    }
-
     /**
      * {@link DecodeEventType}
      */
@@ -140,13 +129,6 @@ public class DecodeEvent implements IDecodeEvent
         return mDecodeEventType;
     }
 
-    /**
-     * Sets the {@link DecodeEventType}
-     */
-    public void setEventType(DecodeEventType eventType) {
-        this.mDecodeEventType = eventType;
-    }
-
     /**
      * Identifier collection for this event.
      */
@@ -222,24 +204,24 @@ public class DecodeEvent implements IDecodeEvent
      * @return timeslot or default value of 0
      */
     @Override
-    public Integer getTimeslot()
+    public int getTimeslot()
     {
         return mTimeslot;
     }
 
     /**
-     * Indicates if this event specifies a timeslot
+     * Indicates if this event specifies a timeslot that is not negative
      */
     public boolean hasTimeslot()
     {
-        return mTimeslot != null;
+        return mTimeslot >= 0;
     }
 
     /**
      * Sets the timeslot for this event
      * @param timeslot of the event
      */
-    public void setTimeslot(Integer timeslot)
+    public void setTimeslot(int timeslot)
     {
         mTimeslot = timeslot;
     }
@@ -249,7 +231,7 @@ public class DecodeEvent implements IDecodeEvent
     {
         StringBuilder sb = new StringBuilder();
         sb.append(mProtocol);
-        sb.append(" DECODE EVENT: ").append(getEventDescription());
+        sb.append(" DECODE EVENT: ").append(getEventType());
         sb.append(" DETAILS:").append(getDetails());
         if(mIdentifierCollection != null)
         {
@@ -267,19 +249,19 @@ public class DecodeEvent implements IDecodeEvent
     {
         protected long mTimeStart;
         protected long mDuration;
-        protected String mEventDescription;
         protected DecodeEventType mDecodeEventType;
         protected IdentifierCollection mIdentifierCollection;
         protected IChannelDescriptor mChannelDescriptor;
         protected String mDetails;
         protected Protocol mProtocol = Protocol.UNKNOWN;
-        protected Integer mTimeslot;
+        protected int mTimeslot = -1;
 
         /**
          * Constructs a builder instance with the specified start time in milliseconds
          */
-        public DecodeEventBuilder(long timeStart)
+        public DecodeEventBuilder(DecodeEventType decodeEventType, long timeStart)
         {
+            mDecodeEventType = decodeEventType;
             mTimeStart = timeStart;
         }
 
@@ -313,21 +295,6 @@ public class DecodeEvent implements IDecodeEvent
             return this;
         }
 
-        public DecodeEventBuilder eventType(DecodeEventType eventType) {
-            mDecodeEventType = eventType;
-            return this;
-        }
-
-        /**
-         * Sets the event description text
-         * @param description of the event
-         */
-        public DecodeEventBuilder eventDescription(String description)
-        {
-            mEventDescription = description;
-            return this;
-        }
-
         /**
          * Sets the identifier collection.
          * @param identifierCollection containing optional identifiers like TO, FROM, frequency and
@@ -359,7 +326,12 @@ public class DecodeEvent implements IDecodeEvent
             return this;
         }
 
-        public DecodeEventBuilder timeslot(Integer timeslot)
+        /**
+         * Sets the timeslot for this event
+         * @param timeslot
+         * @return
+         */
+        public DecodeEventBuilder timeslot(int timeslot)
         {
             mTimeslot = timeslot;
             return this;
@@ -370,11 +342,10 @@ public class DecodeEvent implements IDecodeEvent
          */
         public DecodeEvent build()
         {
-            DecodeEvent decodeEvent = new DecodeEvent(mTimeStart);
+            DecodeEvent decodeEvent = new DecodeEvent(mDecodeEventType, mTimeStart);
             decodeEvent.setChannelDescriptor(mChannelDescriptor);
             decodeEvent.setDetails(mDetails);
             decodeEvent.setDuration(mDuration);
-            decodeEvent.setEventDescription(mEventDescription);
             decodeEvent.setIdentifierCollection(mIdentifierCollection);
             decodeEvent.setProtocol(mProtocol);
             decodeEvent.setTimeslot(mTimeslot);

src/main/java/io/github/dsheirer/module/decode/event/DecodeEventModel.java

@@ -21,25 +21,20 @@ package io.github.dsheirer.module.decode.event;
 import com.google.common.eventbus.Subscribe;
 import io.github.dsheirer.channel.IChannelDescriptor;
 import io.github.dsheirer.eventbus.MyEventBus;
-import io.github.dsheirer.filter.FilterSet;
 import io.github.dsheirer.identifier.IdentifierCollection;
-import io.github.dsheirer.module.decode.event.filter.DecodeEventFilterSet;
-import io.github.dsheirer.module.decode.event.filter.EventFilterProvider;
 import io.github.dsheirer.preference.PreferenceType;
 import io.github.dsheirer.sample.Listener;
-import java.util.ArrayList;
-import java.util.Iterator;
-import java.util.List;
+import java.awt.EventQueue;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import javax.swing.table.AbstractTableModel;
-
-public class DecodeEventModel extends AbstractTableModel implements Listener<IDecodeEvent>, EventFilterProvider<IDecodeEvent>
+/**
+ * Decode event table model
+ */
+public class DecodeEventModel extends ClearableHistoryModel<IDecodeEvent> implements Listener<IDecodeEvent>
 {
     private static final long serialVersionUID = 1L;
     private final static Logger mLog = LoggerFactory.getLogger(DecodeEventModel.class);
-
     public static final int COLUMN_TIME = 0;
     public static final int COLUMN_DURATION = 1;
     public static final int COLUMN_EVENT = 2;
@@ -50,12 +45,6 @@ public class DecodeEventModel extends AbstractTableModel implements Listener<IDe
     public static final int COLUMN_CHANNEL = 7;
     public static final int COLUMN_FREQUENCY = 8;
     public static final int COLUMN_DETAILS = 9;
-
-    protected int mMaxMessages = 200;
-
-    protected List<IDecodeEvent> mEvents = new ArrayList<>();
-    protected FilterSet<IDecodeEvent> mEventFilterSet = new DecodeEventFilterSet();
-
     protected String[] mHeaders = new String[]{"Time", "Duration", "Event", "From", "Alias", "To", "Alias", "Channel", "Frequency", "Details"};
 
     public DecodeEventModel()
@@ -70,72 +59,10 @@ public class DecodeEventModel extends AbstractTableModel implements Listener<IDe
     @Subscribe
     public void preferenceUpdated(PreferenceType preferenceType)
     {
-        if(preferenceType == PreferenceType.DECODE_EVENT)
+        if(preferenceType == PreferenceType.DECODE_EVENT || preferenceType == PreferenceType.TALKGROUP_FORMAT)
         {
-            for(int row = 0; row < mEvents.size(); row++)
-            {
-                fireTableCellUpdated(row, COLUMN_TIME);
-            }
+            fireTableDataChanged();
         }
-        else if(preferenceType == PreferenceType.TALKGROUP_FORMAT)
-        {
-            for(int row = 0; row < mEvents.size(); row++)
-            {
-                fireTableCellUpdated(row, COLUMN_FROM_ID);
-                fireTableCellUpdated(row, COLUMN_TO_ID);
-            }
-        }
-    }
-
-    /**
-     * Access the complete list of events managed by this model.
-     */
-    public List<IDecodeEvent> getEvents()
-    {
-        return new ArrayList<>(mEvents);
-    }
-
-    public void dispose()
-    {
-        MyEventBus.getGlobalEventBus().unregister(this);
-        Iterator<IDecodeEvent> it = mEvents.iterator();
-
-        while(it.hasNext())
-        {
-            it.remove();
-        }
-    }
-
-    public void clear()
-    {
-        mEvents.clear();
-        fireTableDataChanged();
-    }
-
-    /**
-     * Clears all events from this model and loads the events argument
-     */
-    public void clearAndSet(List<IDecodeEvent> events)
-    {
-        mEvents.clear();
-        mEvents.addAll(events);
-        fireTableDataChanged();
-    }
-
-    public void reset()
-    {
-        dispose();
-        fireTableDataChanged();
-    }
-
-    public int getMaxMessageCount()
-    {
-        return mMaxMessages;
-    }
-
-    public void setMaxMessageCount(int count)
-    {
-        mMaxMessages = count;
     }
 
     /**
@@ -146,49 +73,7 @@ public class DecodeEventModel extends AbstractTableModel implements Listener<IDe
      */
     public void receive(final IDecodeEvent event)
     {
-        //Disabled until #1368 decode event is fully implemented
-//        if (!mEventFilterSet.passes(event))
-//        {
-//            return;
-//        }
-
-        if(!mEvents.contains(event))
-        {
-            mEvents.add(0, event);
-            fireTableRowsInserted(0, 0);
-            prune();
-        }
-        else
-        {
-            int row = mEvents.indexOf(event);
-            fireTableRowsUpdated(row, row);
-        }
-    }
-
-    private void prune()
-    {
-        while(mEvents.size() > mMaxMessages)
-        {
-            int index = mEvents.size() - 1;
-            mEvents.remove(index);
-            fireTableRowsDeleted(index, index);
-        }
-    }
-
-    @Override
-    public FilterSet<IDecodeEvent> getFilterSet() {
-        return mEventFilterSet;
-    }
-
-    @Override
-    public void setFilterSet(FilterSet<IDecodeEvent> filterSet) {
-        this.mEventFilterSet = filterSet;
-    }
-
-    @Override
-    public int getRowCount()
-    {
-        return mEvents.size();
+        EventQueue.invokeLater(() -> add(event));
     }
 
     @Override
@@ -205,58 +90,55 @@ public class DecodeEventModel extends AbstractTableModel implements Listener<IDe
     @Override
     public Object getValueAt(int rowIndex, int columnIndex)
     {
-        synchronized(mEvents)
+        IDecodeEvent event = getItem(rowIndex);
+
+        if(event != null)
         {
-            IDecodeEvent event = mEvents.get(rowIndex);
-
-            if(event != null)
+            switch(columnIndex)
             {
-                switch(columnIndex)
-                {
-                    case COLUMN_TIME:
-                        return event.getTimeStart();
-                    case COLUMN_DURATION:
-                        return event.getDuration();
-                    case COLUMN_EVENT:
-                        return event.getEventDescription();
-                    case COLUMN_FROM_ID:
-                        return event.getIdentifierCollection();
-                    case COLUMN_FROM_ALIAS:
-                        return event.getIdentifierCollection();
-                    case COLUMN_TO_ID:
-                        return event.getIdentifierCollection();
-                    case COLUMN_TO_ALIAS:
-                        return event.getIdentifierCollection();
-                    case COLUMN_CHANNEL:
-                        IChannelDescriptor channelDescriptor = event.getChannelDescriptor();
+                case COLUMN_TIME:
+                    return event.getTimeStart();
+                case COLUMN_DURATION:
+                    return event.getDuration();
+                case COLUMN_EVENT:
+                    return event.getEventType().getLabel();
+                case COLUMN_FROM_ID:
+                    return event.getIdentifierCollection();
+                case COLUMN_FROM_ALIAS:
+                    return event.getIdentifierCollection();
+                case COLUMN_TO_ID:
+                    return event.getIdentifierCollection();
+                case COLUMN_TO_ALIAS:
+                    return event.getIdentifierCollection();
+                case COLUMN_CHANNEL:
+                    IChannelDescriptor channelDescriptor = event.getChannelDescriptor();
 
-                        if(channelDescriptor != null)
+                    if(channelDescriptor != null)
+                    {
+                        if(event.hasTimeslot())
                         {
-                            if(event.hasTimeslot())
-                            {
-                                return channelDescriptor.toString() + " TS:" + event.getTimeslot();
-                            }
-                            else
-                            {
-                                return channelDescriptor.toString();
-                            }
+                            return channelDescriptor + " TS:" + event.getTimeslot();
                         }
                         else
                         {
-                            if(event.hasTimeslot())
-                            {
-                                return "TS:" + event.getTimeslot();
-                            }
-                            else
-                            {
-                                return null;
-                            }
+                            return channelDescriptor.toString();
                         }
-                    case COLUMN_FREQUENCY:
-                        return event.getChannelDescriptor();
-                    case COLUMN_DETAILS:
-                        return event.getDetails();
-                }
+                    }
+                    else
+                    {
+                        if(event.hasTimeslot())
+                        {
+                            return "TS:" + event.getTimeslot();
+                        }
+                        else
+                        {
+                            return null;
+                        }
+                    }
+                case COLUMN_FREQUENCY:
+                    return event.getChannelDescriptor();
+                case COLUMN_DETAILS:
+                    return event.getDetails();
             }
         }
 

src/main/java/io/github/dsheirer/module/decode/event/DecodeEventPanel.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
@@ -25,7 +25,6 @@ import io.github.dsheirer.alias.AliasList;
 import io.github.dsheirer.alias.AliasModel;
 import io.github.dsheirer.channel.IChannelDescriptor;
 import io.github.dsheirer.eventbus.MyEventBus;
-import io.github.dsheirer.filter.AllPassFilter;
 import io.github.dsheirer.filter.FilterSet;
 import io.github.dsheirer.icon.IconModel;
 import io.github.dsheirer.identifier.Form;
@@ -33,10 +32,7 @@ import io.github.dsheirer.identifier.Identifier;
 import io.github.dsheirer.identifier.IdentifierCollection;
 import io.github.dsheirer.identifier.Role;
 import io.github.dsheirer.module.ProcessingChain;
-import io.github.dsheirer.module.decode.event.filter.EventClearButton;
-import io.github.dsheirer.module.decode.event.filter.EventClearHandler;
-import io.github.dsheirer.module.decode.event.filter.EventFilterButton;
-import io.github.dsheirer.module.decode.event.filter.EventFilterProvider;
+import io.github.dsheirer.module.decode.event.filter.DecodeEventFilterSet;
 import io.github.dsheirer.preference.PreferenceType;
 import io.github.dsheirer.preference.UserPreferences;
 import io.github.dsheirer.preference.swing.JTableColumnWidthMonitor;
@@ -58,7 +54,10 @@ import javax.swing.JLabel;
 import javax.swing.JPanel;
 import javax.swing.JScrollPane;
 import javax.swing.JTable;
+import javax.swing.RowFilter;
 import javax.swing.table.DefaultTableCellRenderer;
+import javax.swing.table.TableModel;
+import javax.swing.table.TableRowSorter;
 
 public class DecodeEventPanel extends JPanel implements Listener<ProcessingChain>
 {
@@ -75,7 +74,10 @@ public class DecodeEventPanel extends JPanel implements Listener<ProcessingChain
     private AliasModel mAliasModel;
     private UserPreferences mUserPreferences;
     private TimestampCellRenderer mTimestampCellRenderer;
-    private EventManagementPanel mEventManagementPanel;
+    private FilterSet<IDecodeEvent> mFilterSet = new DecodeEventFilterSet();
+    private TableRowSorter<TableModel> mTableRowSorter;
+    private HistoryManagementPanel<IDecodeEvent> mHistoryManagementPanel;
+
 
     /**
      * View for call event table
@@ -91,17 +93,20 @@ public class DecodeEventPanel extends JPanel implements Listener<ProcessingChain
         mUserPreferences = userPreferences;
         mTimestampCellRenderer = new TimestampCellRenderer();
         mTable = new JTable(mEventModel);
-        mTable.setAutoCreateRowSorter(true);
+        mTableRowSorter = new TableRowSorter<>(mEventModel);
+        mTableRowSorter.setRowFilter(new EventRowFilter());
+        mTable.setRowSorter(mTableRowSorter);
         mTable.setAutoResizeMode(JTable.AUTO_RESIZE_LAST_COLUMN);
-        mEventManagementPanel = new EventManagementPanel();
         mTableColumnWidthMonitor = new JTableColumnWidthMonitor(mUserPreferences, mTable, TABLE_PREFERENCE_KEY);
         updateCellRenderers();
-
-        //Disabled until #1368 decode event is fully implemented
-//        add(mEventManagementPanel, "span,growx");
-
+        mHistoryManagementPanel = new HistoryManagementPanel<>(mEventModel, "Event Filter Editor");
+        mHistoryManagementPanel.updateFilterSet(mFilterSet);
+        add(mHistoryManagementPanel, "span,growx");
         mEmptyScroller = new JScrollPane(mTable);
         add(mEmptyScroller);
+
+        //Register filter change listener to refresh the table any time the event filters are changed.
+        mFilterSet.register(() -> mEventModel.fireTableDataChanged());
     }
 
     public void dispose()
@@ -124,22 +129,14 @@ public class DecodeEventPanel extends JPanel implements Listener<ProcessingChain
 
     private void updateCellRenderers()
     {
-        mTable.getColumnModel().getColumn(DecodeEventModel.COLUMN_TIME)
-            .setCellRenderer(mTimestampCellRenderer);
-        mTable.getColumnModel().getColumn(DecodeEventModel.COLUMN_DURATION)
-            .setCellRenderer(new DurationCellRenderer());
-        mTable.getColumnModel().getColumn(DecodeEventModel.COLUMN_FROM_ID)
-            .setCellRenderer(new IdentifierCellRenderer(Role.FROM));
-        mTable.getColumnModel().getColumn(DecodeEventModel.COLUMN_FROM_ALIAS)
-            .setCellRenderer(new AliasedIdentifierCellRenderer(Role.FROM));
-        mTable.getColumnModel().getColumn(DecodeEventModel.COLUMN_TO_ID)
-            .setCellRenderer(new IdentifierCellRenderer(Role.TO));
-        mTable.getColumnModel().getColumn(DecodeEventModel.COLUMN_TO_ALIAS)
-            .setCellRenderer(new AliasedIdentifierCellRenderer(Role.TO));
-        mTable.getColumnModel().getColumn(DecodeEventModel.COLUMN_CHANNEL)
-            .setCellRenderer(new ChannelDescriptorCellRenderer());
-        mTable.getColumnModel().getColumn(DecodeEventModel.COLUMN_FREQUENCY)
-            .setCellRenderer(new FrequencyCellRenderer());
+        mTable.getColumnModel().getColumn(DecodeEventModel.COLUMN_TIME).setCellRenderer(mTimestampCellRenderer);
+        mTable.getColumnModel().getColumn(DecodeEventModel.COLUMN_DURATION).setCellRenderer(new DurationCellRenderer());
+        mTable.getColumnModel().getColumn(DecodeEventModel.COLUMN_FROM_ID).setCellRenderer(new IdentifierCellRenderer(Role.FROM));
+        mTable.getColumnModel().getColumn(DecodeEventModel.COLUMN_FROM_ALIAS).setCellRenderer(new AliasedIdentifierCellRenderer(Role.FROM));
+        mTable.getColumnModel().getColumn(DecodeEventModel.COLUMN_TO_ID).setCellRenderer(new IdentifierCellRenderer(Role.TO));
+        mTable.getColumnModel().getColumn(DecodeEventModel.COLUMN_TO_ALIAS).setCellRenderer(new AliasedIdentifierCellRenderer(Role.TO));
+        mTable.getColumnModel().getColumn(DecodeEventModel.COLUMN_CHANNEL).setCellRenderer(new ChannelDescriptorCellRenderer());
+        mTable.getColumnModel().getColumn(DecodeEventModel.COLUMN_FREQUENCY).setCellRenderer(new FrequencyCellRenderer());
     }
 
     @Override
@@ -156,76 +153,17 @@ public class DecodeEventPanel extends JPanel implements Listener<ProcessingChain
                 mCurrentEventHistory = processingChain.getDecodeEventHistory();
                 mEventModel.clearAndSet(mCurrentEventHistory.getItems());
                 processingChain.getDecodeEventHistory().addListener(mEventModel);
-                mEventManagementPanel.enableButtons();
+                mHistoryManagementPanel.setEnabled(true);
             }
             else
             {
                 mCurrentEventHistory = null;
                 mEventModel.clearAndSet(Collections.emptyList());
-                mEventManagementPanel.disableButtons();
+                mHistoryManagementPanel.setEnabled(false);
             }
         });
     }
 
-    public class EventManagementPanel extends JPanel
-    {
-        private static final long serialVersionUID = 1L;
-
-        private EventFilterButton<IDecodeEvent> mFilterButton;
-        private EventClearButton mEventClearButton;
-
-        public EventManagementPanel()
-        {
-            setLayout(new MigLayout("insets 2 2 5 5", "[]5[left,grow]", ""));
-
-            initializeFilterButton();
-            initializeClearButton();
-            disableButtons();
-
-            add(mFilterButton);
-            add(mEventClearButton);
-        }
-
-        public void enableButtons()
-        {
-            mFilterButton.setEnabled(true);
-            mEventClearButton.setEnabled(true);
-        }
-
-        public void disableButtons()
-        {
-            mFilterButton.setEnabled(false);
-            mEventClearButton.setEnabled(false);
-        }
-
-        private void initializeFilterButton()
-        {
-            EventFilterProvider<IDecodeEvent> filterProvider = (EventFilterProvider<IDecodeEvent>) mTable.getModel();
-            FilterSet<IDecodeEvent> filterSet = new FilterSet<>(new AllPassFilter<>());
-            if (filterProvider != null) {
-                filterSet = filterProvider.getFilterSet();
-            }
-            mFilterButton = new EventFilterButton<>("Message Filter Editor", filterSet);
-        }
-
-        private void initializeClearButton() {
-            mEventClearButton = new EventClearButton(
-                    ((DecodeEventModel) mTable.getModel()).getMaxMessageCount()
-            );
-            mEventClearButton.setEventClearHandler(new EventClearHandler() {
-                @Override
-                public void onHistoryLimitChanged(int newHistoryLimit) {
-                    ((DecodeEventModel) mTable.getModel()).setMaxMessageCount(newHistoryLimit);
-                }
-
-                @Override
-                public void onClearHistoryClicked() {
-                    ((DecodeEventModel) mTable.getModel()).clear();
-                }
-            });
-        }
-    }
-
     /**
      * Custom cell renderer for displaying identifiers from an identifier collection
      */
@@ -479,4 +417,26 @@ public class DecodeEventPanel extends JPanel implements Listener<ProcessingChain
             setHorizontalAlignment(JLabel.CENTER);
         }
     }
+
+    /**
+     * Row filter for decode events
+     */
+    public class EventRowFilter extends RowFilter<TableModel, Integer>
+    {
+        @Override
+        public boolean include(Entry<? extends TableModel, ? extends Integer> entry)
+        {
+            if(entry.getModel() instanceof DecodeEventModel model)
+            {
+                IDecodeEvent event = model.getItem(entry.getIdentifier());
+
+                if(event != null)
+                {
+                    return mFilterSet.canProcess(event) && mFilterSet.passes(event);
+                }
+            }
+
+            return false;
+        }
+    }
 }

src/main/java/io/github/dsheirer/module/decode/event/DecodeEventType.java

@@ -19,10 +19,17 @@
 
 package io.github.dsheirer.module.decode.event;
 
+import java.util.Arrays;
+import java.util.EnumSet;
+
+/**
+ * Enumeration of event types for decoded events.
+ */
 public enum DecodeEventType
 {
     AFFILIATE("Affiliate"),
     ANNOUNCEMENT("Announcement"),
+    ACKNOWLEDGE("Acknowledge"),
     AUTOMATIC_REGISTRATION_SERVICE("Motorola ARS"),
     CALL("Call"),
     CALL_ENCRYPTED("Encrypted Call"),
@@ -32,6 +39,7 @@ public enum DecodeEventType
     CALL_PATCH_GROUP_ENCRYPTED("Encrypted Patch Call"),
     CALL_ALERT("Call Alert"),
     CALL_DETECT("Call Detect"),
+    CALL_IN_PROGRESS("Call In Progress"),
     CALL_DO_NOT_MONITOR("Call-Do Not Monitor"),
     CALL_END("Call End"),
     CALL_INTERCONNECT("Telephone Call"),
@@ -41,6 +49,7 @@ public enum DecodeEventType
     CALL_UNIT_TO_UNIT_ENCRYPTED("Encrypted Unit To Unit Call"),
     CALL_NO_TUNER("Call - No Tuner"),
     CALL_TIMEOUT("Call Timeout"),
+    CELLOCATOR("Cellocator"),
     COMMAND("Command"),
     DATA_CALL("Data Call"),
     DATA_CALL_ENCRYPTED("Encrypted Data Call"),
@@ -53,6 +62,7 @@ public enum DecodeEventType
     ID_ANI("ANI"),
     ID_UNIQUE("Unique ID"),
     IP_PACKET("IP Packet"),
+    LRRP("Motorola LRRP"),
     NOTIFICATION("Notification"),
     PAGE("Page"),
     QUERY("Query"),
@@ -72,16 +82,82 @@ public enum DecodeEventType
 
     private String mLabel;
 
+    /**
+     * Encrypted voice call event types for filtering
+     */
+    public static final EnumSet<DecodeEventType> VOICE_CALLS_ENCRYPTED = EnumSet.of(DecodeEventType.CALL_ENCRYPTED,
+        DecodeEventType.CALL_GROUP_ENCRYPTED, DecodeEventType.CALL_PATCH_GROUP_ENCRYPTED,
+        DecodeEventType.CALL_INTERCONNECT_ENCRYPTED, DecodeEventType.CALL_UNIT_TO_UNIT_ENCRYPTED);
+
+    /**
+     * Voice call event types for filtering
+     */
+    public static final EnumSet<DecodeEventType> VOICE_CALLS = EnumSet.of(DecodeEventType.CALL_GROUP,
+            DecodeEventType.CALL_PATCH_GROUP, DecodeEventType.CALL_ALERT, DecodeEventType.CALL_DETECT,
+            DecodeEventType.CALL_DO_NOT_MONITOR, DecodeEventType.CALL_END, DecodeEventType.CALL_INTERCONNECT,
+            DecodeEventType.CALL_UNIQUE_ID, DecodeEventType.CALL_UNIT_TO_UNIT, DecodeEventType.CALL_NO_TUNER,
+            DecodeEventType.CALL_TIMEOUT);
+
+    /**
+     * Command event types for filtering
+     */
+    public static final EnumSet<DecodeEventType> COMMANDS = EnumSet.of(DecodeEventType.ANNOUNCEMENT,
+            DecodeEventType.STATION_ID, DecodeEventType.ACKNOWLEDGE, DecodeEventType.PAGE, DecodeEventType.QUERY,
+            DecodeEventType.RADIO_CHECK, DecodeEventType.STATUS, DecodeEventType.COMMAND, DecodeEventType.EMERGENCY,
+            DecodeEventType.NOTIFICATION, DecodeEventType.FUNCTION);
+
+    /**
+     * Data call event types for filtering
+     */
+    public static final EnumSet<DecodeEventType> DATA_CALLS = EnumSet.of(DecodeEventType.DATA_CALL,
+            DecodeEventType.DATA_CALL_ENCRYPTED, DecodeEventType.DATA_PACKET, DecodeEventType.GPS,
+            DecodeEventType.IP_PACKET, DecodeEventType.UDP_PACKET, DecodeEventType.SDM, DecodeEventType.ID_ANI,
+            DecodeEventType.ID_UNIQUE);
+
+    /**
+     * Registration event types for filtering
+     */
+    public static final EnumSet<DecodeEventType> REGISTRATION = EnumSet.of(DecodeEventType.AFFILIATE,
+            DecodeEventType.AUTOMATIC_REGISTRATION_SERVICE, DecodeEventType.REGISTER, DecodeEventType.REGISTER_ESN,
+            DecodeEventType.DEREGISTER, DecodeEventType.REQUEST, DecodeEventType.RESPONSE, DecodeEventType.RESPONSE_PACKET);
+
+    /**
+     * All other event types of this enumeration that are not included in the groupings above.
+     */
+    public static final EnumSet<DecodeEventType> OTHERS = EnumSet.copyOf(Arrays.stream(DecodeEventType.values())
+            .filter(decodeEventType -> !decodeEventType.isGrouped()).toList());
+
+    /**
+     * Constructor
+     * @param label for the element
+     */
     DecodeEventType(String label)
     {
         mLabel = label;
     }
 
+    /**
+     * Indicates if the enumeration element is contained in one of the enumset groupings above.
+     * @return true if the element is grouped.
+     */
+    public boolean isGrouped()
+    {
+        return VOICE_CALLS.contains(this) || VOICE_CALLS_ENCRYPTED.contains(this) || COMMANDS.contains(this) ||
+                DATA_CALLS.contains(this) || REGISTRATION.contains(this);
+    }
+
+    /**
+     * Label or pretty value for the element
+     * @return label
+     */
     public String getLabel()
     {
         return mLabel;
     }
 
+    /**
+     * Uses label as the default string value.
+     */
     public String toString()
     {
         return mLabel;

src/main/java/io/github/dsheirer/module/decode/event/HistoryManagementPanel.java

@@ -0,0 +1,212 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.event;
+
+import io.github.dsheirer.filter.FilterEditor;
+import io.github.dsheirer.filter.FilterSet;
+import java.awt.EventQueue;
+import java.awt.event.MouseEvent;
+import java.awt.event.MouseListener;
+import net.miginfocom.swing.MigLayout;
+
+import javax.swing.JButton;
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JSlider;
+import javax.swing.SwingUtilities;
+
+/**
+ * History management panel with controls for managing item histories.
+ */
+public class HistoryManagementPanel<T> extends JPanel
+{
+    private ClearableHistoryModel mModel;
+    private FilterSet<T> mFilterSet;
+    private FilterEditor<T> mFilterEditor;
+    private JButton mClearButton;
+    private JButton mFilterButton;
+    private JSlider mHistorySlider;
+    private JLabel mHistoryTitleLabel;
+    private JLabel mHistoryValueLabel;
+    private String mFilterEditorTitle;
+
+    /**
+     * Constructs an instance
+     * @param model to manage
+     */
+    public HistoryManagementPanel(ClearableHistoryModel model, String filterEditorTitle)
+    {
+        mModel = model;
+        mFilterEditorTitle = filterEditorTitle;
+        setLayout(new MigLayout("insets 6 1 5 5", "[]5[]10[]5[]5[][grow]", ""));
+        add(getFilterButton());
+        add(getClearButton());
+        add(getHistoryTitleLabel());
+        add(getHistorySlider());
+        add(getHistoryValueLabel());
+        setEnabled(false);
+    }
+
+    /**
+     * Updates the filter set
+     * @param filterSet to use
+     */
+    public void updateFilterSet(FilterSet<T> filterSet)
+    {
+        mFilterSet = filterSet;
+
+        if(mFilterEditor != null)
+        {
+            getFilterEditor().updateFilterSet(filterSet);
+        }
+    }
+
+    /**
+     * Overrides the panel method to also set the enabled state for the child controls.
+     * @param enabled true if this component should be enabled, false otherwise
+     */
+    @Override
+    public void setEnabled(boolean enabled)
+    {
+        super.setEnabled(enabled);
+        getClearButton().setEnabled(enabled);
+        getFilterButton().setEnabled(enabled);
+        getHistoryValueLabel().setEnabled(enabled);
+        getHistoryTitleLabel().setEnabled(enabled);
+        getHistorySlider().setEnabled(enabled);
+    }
+
+    /**
+     * Filter editor
+     * @return editor lazily constructed
+     */
+    private FilterEditor<T> getFilterEditor()
+    {
+        if(mFilterEditor == null)
+        {
+            mFilterEditor = new FilterEditor<>(mFilterEditorTitle, getFilterButton(), mFilterSet);
+        }
+
+        return mFilterEditor;
+    }
+
+    /**
+     * Filter button for accessing the filter editor
+     * @return filter button
+     */
+    private JButton getFilterButton()
+    {
+        if(mFilterButton == null)
+        {
+            mFilterButton = new JButton("Filters");
+            mFilterButton.setToolTipText("Edit filters");
+            mFilterButton.addActionListener(arg0 -> EventQueue.invokeLater(() -> getFilterEditor().setVisible(true)));
+        }
+
+        return mFilterButton;
+    }
+
+    /**
+     * Clear button
+     * @return clear button
+     */
+    private JButton getClearButton()
+    {
+        if(mClearButton == null)
+        {
+            mClearButton = new JButton("Clear");
+            mClearButton.addActionListener(e -> mModel.clear());
+            mClearButton.setToolTipText("Clears the history");
+        }
+
+        return mClearButton;
+    }
+
+    /**
+     * History value label.
+     * @return label
+     */
+    private JLabel getHistoryValueLabel()
+    {
+        if(mHistoryValueLabel == null)
+        {
+            mHistoryValueLabel = new JLabel(String.valueOf(ClearableHistoryModel.DEFAULT_HISTORY_SIZE));
+        }
+
+        return mHistoryValueLabel;
+    }
+
+    /**
+     * History title label
+     * @return label
+     */
+    private JLabel getHistoryTitleLabel()
+    {
+        if(mHistoryTitleLabel == null)
+        {
+            mHistoryTitleLabel = new JLabel("History:");
+        }
+
+        return mHistoryTitleLabel;
+    }
+
+    /**
+     * History value slider control
+     * @return slider
+     */
+    private JSlider getHistorySlider()
+    {
+        if(mHistorySlider == null)
+        {
+            mHistorySlider = new JSlider();
+            mHistorySlider.setToolTipText("Adjust history size.  Double-click to reset to default 200");
+            mHistorySlider.setMinimum(0);
+            mHistorySlider.setMaximum(2000);
+            mHistorySlider.setMinorTickSpacing(25);
+            mHistorySlider.setMajorTickSpacing(500);
+            mHistorySlider.setPaintTicks(false);
+            mHistorySlider.setPaintLabels(false);
+            mHistorySlider.addMouseListener(new MouseListener()
+            {
+                @Override
+                public void mouseClicked(MouseEvent arg0)
+                {
+                    if(SwingUtilities.isLeftMouseButton(arg0) && arg0.getClickCount() == 2)
+                    {
+                        mHistorySlider.setValue(ClearableHistoryModel.DEFAULT_HISTORY_SIZE);
+                    }
+                }
+
+                public void mouseEntered(MouseEvent arg0) {}
+                public void mouseExited(MouseEvent arg0) {}
+                public void mousePressed(MouseEvent arg0) {}
+                public void mouseReleased(MouseEvent arg0) {}
+            });
+
+            mHistorySlider.setValue(mModel.getHistorySize());
+            mHistorySlider.addChangeListener(e -> {
+                mModel.setHistorySize(mHistorySlider.getValue());
+                getHistoryValueLabel().setText(String.valueOf(mHistorySlider.getValue()));
+            });
+        }
+
+        return mHistorySlider;
+    }
+}

src/main/java/io/github/dsheirer/module/decode/event/IDecodeEvent.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
@@ -48,11 +48,6 @@ public interface IDecodeEvent
      */
     long getDuration();
 
-    /**
-     * A description of the event or event type
-     */
-    String getEventDescription();
-
     /**
      * Collection of identifiers associated with the event.  This collection should contain a
      * Role.FROM and a Role.TO identifier, a Decoder Type identifier, and (optionally) an Alias List
@@ -86,7 +81,7 @@ public interface IDecodeEvent
      * Timeslot for the event.
      * @return timeslot or default of 0
      */
-    Integer getTimeslot();
+    int getTimeslot();
 
     /**
      * Indicates if the event has a timeslot specified

src/main/java/io/github/dsheirer/module/decode/event/MessageActivityModel.java

@@ -18,19 +18,16 @@
  */
 package io.github.dsheirer.module.decode.event;
 
-import io.github.dsheirer.filter.AllPassFilter;
-import io.github.dsheirer.filter.FilterSet;
 import io.github.dsheirer.message.IMessage;
 import io.github.dsheirer.message.StuffBitsMessage;
 import io.github.dsheirer.sample.Listener;
 import java.awt.EventQueue;
 import java.text.SimpleDateFormat;
-import java.util.LinkedList;
-import java.util.List;
 
-import javax.swing.table.AbstractTableModel;
-
-public class MessageActivityModel extends AbstractTableModel implements Listener<IMessage>
+/**
+ * Table Model for decoded IMessages.
+ */
+public class MessageActivityModel extends ClearableHistoryModel<MessageItem> implements Listener<IMessage>
 {
     private static final long serialVersionUID = 1L;
     private static final int TIME = 0;
@@ -38,95 +35,20 @@ public class MessageActivityModel extends AbstractTableModel implements Listener
     private static final int TIMESLOT = 2;
     private static final int MESSAGE = 3;
 
-    protected int mMaxMessages = 200;
-    protected LinkedList<MessageItem> mMessageItems = new LinkedList<>();
-    protected int[] mColumnWidths = {20, 20, 500};
-    protected String[] mHeaders = new String[]{"Time", "Protocol", "Timeslot", "Message"};
-
+    private String[] mHeaders = new String[]{"Time", "Protocol", "Timeslot", "Message"};
     private SimpleDateFormat mSDFTime = new SimpleDateFormat("yyyy:MM:dd HH:mm:ss");
 
-    private FilterSet<IMessage> mMessageFilterSet = new FilterSet<>(new AllPassFilter<>());
-
+    /**
+     * Constructor
+     */
     public MessageActivityModel()
     {
     }
 
     /**
-     * Applies the filter set
+     * Implements the listener interface and wraps the IMessage in table-compatible message item wrapper.
+     * @param message to add to the model
      */
-    public void setFilters(FilterSet filterSet)
-    {
-        mMessageFilterSet = filterSet;
-    }
-
-    public void clearFilters()
-    {
-        mMessageFilterSet = new FilterSet<>(new AllPassFilter<>());
-    }
-
-    /**
-     * Clears all messages from history
-     */
-    public void clear()
-    {
-        EventQueue.invokeLater(() -> {
-            mMessageItems.clear();
-            fireTableDataChanged();
-        });
-    }
-
-    /**
-     * Clears the current messages and loads the messages argument
-     */
-    public void clearAndSet(List<IMessage> messages)
-    {
-        EventQueue.invokeLater(() -> {
-            mMessageItems.clear();
-            fireTableDataChanged();
-            for(IMessage message: messages)
-            {
-                receive(message);
-            }
-        });
-    }
-
-    public FilterSet<IMessage> getMessageFilterSet()
-    {
-        return mMessageFilterSet;
-    }
-
-    public void dispose()
-    {
-        mMessageItems.clear();
-    }
-
-    public int[] getColumnWidths()
-    {
-        return mColumnWidths;
-    }
-
-    public void setColumnWidths(int[] widths)
-    {
-        if(widths.length != 3)
-        {
-            throw new IllegalArgumentException("MessageActivityModel - column widths array should have 3 elements");
-        }
-        else
-        {
-            mColumnWidths = widths;
-        }
-    }
-
-    public int getMaxMessageCount()
-    {
-        return mMaxMessages;
-    }
-
-    public void setMaxMessageCount(int count)
-    {
-        mMaxMessages = count;
-    }
-
     public void receive(final IMessage message)
     {
         //Don't process tail bits or stuff bits message fragments
@@ -135,39 +57,7 @@ public class MessageActivityModel extends AbstractTableModel implements Listener
             return;
         }
 
-        if(mMessageFilterSet.passes(message))
-        {
-            final MessageItem messageItem = new MessageItem(message);
-
-            EventQueue.invokeLater(new Runnable()
-            {
-                @Override
-                public void run()
-                {
-                    mMessageItems.addFirst(messageItem);
-
-                    MessageActivityModel.this.fireTableRowsInserted(0, 0);
-
-                    prune();
-                }
-            });
-        }
-    }
-
-    private void prune()
-    {
-        while(mMessageItems.size() > mMaxMessages)
-        {
-            MessageItem removed = mMessageItems.removeLast();
-            removed.dispose();
-            super.fireTableRowsDeleted(mMessageItems.size() - 1, mMessageItems.size() - 1);
-        }
-    }
-
-    @Override
-    public int getRowCount()
-    {
-        return mMessageItems.size();
+        EventQueue.invokeLater(() -> add(new MessageItem(message)));
     }
 
     @Override
@@ -184,20 +74,20 @@ public class MessageActivityModel extends AbstractTableModel implements Listener
     @Override
     public Object getValueAt(int rowIndex, int columnIndex)
     {
-        if(0 <= rowIndex && rowIndex < mMessageItems.size())
-        {
-            MessageItem messageItem = mMessageItems.get(rowIndex);
+        MessageItem item = getItem(rowIndex);
 
+        if(item != null)
+        {
             switch(columnIndex)
             {
                 case TIME:
-                    return messageItem.getTimestamp(mSDFTime);
+                    return item.getTimestamp(mSDFTime);
                 case PROTOCOL:
-                    return messageItem.getProtocol();
+                    return item.getProtocol();
                 case TIMESLOT:
-                    return messageItem.getTimeslot();
+                    return item.getTimeslot();
                 case MESSAGE:
-                    return messageItem.getText();
+                    return item.getText();
                 default:
                     break;
             }

src/main/java/io/github/dsheirer/module/decode/event/MessageActivityPanel.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
@@ -15,13 +14,10 @@
  *
  * 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.module.decode.event;
 
-import com.jidesoft.swing.JideButton;
-import com.jidesoft.swing.JideSplitButton;
-import io.github.dsheirer.filter.FilterEditorPanel;
 import io.github.dsheirer.filter.FilterSet;
 import io.github.dsheirer.message.IMessage;
 import io.github.dsheirer.message.MessageHistory;
@@ -30,37 +26,35 @@ import io.github.dsheirer.module.decode.DecoderFactory;
 import io.github.dsheirer.preference.UserPreferences;
 import io.github.dsheirer.preference.swing.JTableColumnWidthMonitor;
 import io.github.dsheirer.sample.Listener;
+import java.util.ArrayList;
+import java.util.List;
 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.JSlider;
 import javax.swing.JTable;
-import javax.swing.SwingUtilities;
-import javax.swing.event.ChangeEvent;
-import javax.swing.event.ChangeListener;
-import java.awt.EventQueue;
-import java.awt.event.ActionEvent;
-import java.awt.event.ActionListener;
-import java.awt.event.MouseEvent;
-import java.awt.event.MouseListener;
+import javax.swing.RowFilter;
+import javax.swing.table.TableModel;
+import javax.swing.table.TableRowSorter;
 
+/**
+ * Panel to display decoded messages/activity.
+ */
 public class MessageActivityPanel extends JPanel implements Listener<ProcessingChain>
 {
     private static final long serialVersionUID = 1L;
-    private final static Logger mLog = LoggerFactory.getLogger(MessageActivityPanel.class);
-    private static final String TABLE_PREFERENCE_KEY = "message.activity.panel";
-    private static MessageActivityModel mMessageModel = new MessageActivityModel();
+    private static final Logger mLog = LoggerFactory.getLogger(MessageActivityPanel.class);
+    private final String TABLE_PREFERENCE_KEY = "message.activity.panel";
+    private MessageActivityModel mMessageModel = new MessageActivityModel();
     private MessageHistory mCurrentMessageHistory;
     private JTable mTable = new JTable(mMessageModel);
+    private TableRowSorter<TableModel> mTableRowSorter;
     private JTableColumnWidthMonitor mTableColumnWidthMonitor;
     private UserPreferences mUserPreferences;
-    private MessageManagementPanel mManagementPanel = new MessageManagementPanel();
+    private FilterSet<IMessage> mMessageFilterSet;
+    private HistoryManagementPanel<IMessage> mHistoryManagementPanel;
 
     /**
      * Constructs an instance
@@ -69,13 +63,14 @@ public class MessageActivityPanel extends JPanel implements Listener<ProcessingC
     public MessageActivityPanel(UserPreferences userPreferences)
     {
         mUserPreferences = userPreferences;
-
-        setLayout(new MigLayout("insets 0 0 0 0", "[][grow,fill]", "[]0[grow,fill]"));
-
-        add(mManagementPanel, "span,growx");
-
-        add(new JScrollPane(mTable), "span,grow");
+        mTableRowSorter = new TableRowSorter<>(mMessageModel);
+        mTableRowSorter.setRowFilter(new MessageRowFilter());
+        mTable.setRowSorter(mTableRowSorter);
         mTableColumnWidthMonitor = new JTableColumnWidthMonitor(mUserPreferences, mTable, TABLE_PREFERENCE_KEY);
+        setLayout(new MigLayout("insets 0 0 0 0", "[][grow,fill]", "[]0[grow,fill]"));
+        mHistoryManagementPanel = new HistoryManagementPanel<>(mMessageModel, "Message Filter Editor");
+        add(mHistoryManagementPanel, "span,growx");
+        add(new JScrollPane(mTable), "span,grow");
     }
 
     /**
@@ -89,182 +84,62 @@ public class MessageActivityPanel extends JPanel implements Listener<ProcessingC
             mCurrentMessageHistory.removeListener(mMessageModel);
         }
 
+        //Unregister from changes made to the filter set
+        if(mMessageFilterSet != null)
+        {
+            mMessageFilterSet.register(null);
+        }
+
         if(processingChain != null)
         {
             mCurrentMessageHistory = processingChain.getMessageHistory();
-            mMessageModel.setFilters(DecoderFactory.getMessageFilters(processingChain.getModules()));
-            mMessageModel.clearAndSet(mCurrentMessageHistory.getItems());
+            mMessageFilterSet = DecoderFactory.getMessageFilters(processingChain.getModules());
+            //Register filter change listener to refresh the table any time the event filters are changed.
+            mMessageFilterSet.register(() -> mMessageModel.fireTableDataChanged());
+            if(mHistoryManagementPanel != null)
+            {
+                mHistoryManagementPanel.updateFilterSet(mMessageFilterSet);
+            }
+
+            List<MessageItem> currentHistory = new ArrayList<>();
+            for(IMessage message: mCurrentMessageHistory.getItems())
+            {
+                currentHistory.add(new MessageItem(message));
+            }
+
+            mMessageModel.clearAndSet(currentHistory);
             mCurrentMessageHistory.addListener(mMessageModel);
-            mManagementPanel.enableButtons();
+            mHistoryManagementPanel.setEnabled(true);
         }
         else
         {
             mCurrentMessageHistory = null;
-            mMessageModel.clearFilters();
+            mMessageFilterSet = null;
             mMessageModel.clear();
-            mManagementPanel.disableButtons();
+            mHistoryManagementPanel.setEnabled(false);
         }
     }
 
-    public class MessageManagementPanel extends JPanel
+    /**
+     * Row visibility filter for messages
+     */
+    public class MessageRowFilter extends RowFilter<TableModel, Integer>
     {
-        private static final long serialVersionUID = 1L;
-
-        private MessageHistoryButton mHistoryButton = new MessageHistoryButton();
-        private MessageFilterButton mFilterButton = new MessageFilterButton();
-
-        public MessageManagementPanel()
+        @Override
+        public boolean include(Entry<? extends TableModel, ? extends Integer> entry)
         {
-            setLayout(new MigLayout("insets 2 2 5 5", "[]5[left,grow]", ""));
-
-            disableButtons();
-
-            add(mFilterButton);
-            add(mHistoryButton);
-        }
-
-        public void enableButtons()
-        {
-            mHistoryButton.setEnabled(true);
-            mFilterButton.setEnabled(true);
-        }
-
-        public void disableButtons()
-        {
-            mHistoryButton.setEnabled(false);
-            mFilterButton.setEnabled(false);
-        }
-    }
-
-    public class MessageHistoryButton extends JideSplitButton
-    {
-        private static final long serialVersionUID = 1L;
-
-        public MessageHistoryButton()
-        {
-            super("Clear");
-
-            JPanel historyPanel = new JPanel();
-
-            historyPanel.add(new JLabel("Message History:"));
-
-            final JSlider slider = new JSlider();
-            slider.setMinimum(0);
-            slider.setMaximum(2000);
-            slider.setMajorTickSpacing(500);
-            slider.setPaintTicks(true);
-            slider.setPaintLabels(true);
-
-            slider.addMouseListener(new MouseListener()
+            if(entry.getModel() instanceof MessageActivityModel model)
             {
-                @Override
-                public void mouseClicked(MouseEvent arg0)
+                MessageItem item = model.getItem(entry.getIdentifier());
+
+                if(mMessageFilterSet != null && item != null && item.getMessage() != null)
                 {
-                    if(SwingUtilities.isLeftMouseButton(arg0) && arg0.getClickCount() == 2)
-                    {
-                        slider.setValue(500); //default
-                    }
+                    IMessage message = item.getMessage();
+                    return mMessageFilterSet.canProcess(message) && mMessageFilterSet.passes(message);
                 }
+            }
 
-                public void mouseEntered(MouseEvent arg0)
-                {
-                }
-
-                public void mouseExited(MouseEvent arg0)
-                {
-                }
-
-                public void mousePressed(MouseEvent arg0)
-                {
-                }
-
-                public void mouseReleased(MouseEvent arg0)
-                {
-                }
-            });
-
-            slider.setValue(((MessageActivityModel) mTable.getModel()).getMaxMessageCount());
-            slider.addChangeListener(new ChangeListener()
-            {
-                @Override
-                public void stateChanged(ChangeEvent arg0)
-                {
-                    ((MessageActivityModel) mTable.getModel()).setMaxMessageCount(slider.getValue());
-                }
-            });
-
-            historyPanel.add(slider);
-
-            add(historyPanel);
-
-            /* Clear messages */
-            addActionListener(new ActionListener()
-            {
-                @Override
-                public void actionPerformed(ActionEvent e)
-                {
-                    ((MessageActivityModel) mTable.getModel()).clear();
-                }
-            });
-        }
-    }
-
-    public class MessageFilterButton extends JideButton
-    {
-        private static final long serialVersionUID = 1L;
-
-        public MessageFilterButton()
-        {
-            super("Filter");
-
-            addActionListener(new ActionListener()
-            {
-                @Override
-                public void actionPerformed(ActionEvent arg0)
-                {
-                    final JFrame editor = new JFrame();
-
-                    editor.setTitle("Message Filter Editor");
-                    editor.setSize(600, 400);
-                    editor.setLocationRelativeTo(MessageFilterButton.this);
-                    editor.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
-                    editor.setLayout(new MigLayout("", "[grow,fill]",
-                            "[grow,fill][][]"));
-
-                    @SuppressWarnings("unchecked")
-                    FilterSet<IMessage> filter = (FilterSet<IMessage>) ((MessageActivityModel) mTable.getModel())
-                            .getMessageFilterSet();
-
-                    FilterEditorPanel<IMessage> panel = new FilterEditorPanel<>(filter);
-
-                    JScrollPane scroller = new JScrollPane(panel);
-                    scroller.setViewportView(panel);
-
-                    editor.add(scroller, "wrap");
-
-                    editor.add(new JLabel("Right-click to select/deselect all nodes"), "wrap");
-
-                    JButton close = new JButton("Close");
-                    close.addActionListener(new ActionListener()
-                    {
-                        @Override
-                        public void actionPerformed(ActionEvent e)
-                        {
-                            editor.dispose();
-                        }
-                    });
-
-                    editor.add(close);
-
-                    EventQueue.invokeLater(new Runnable()
-                    {
-                        public void run()
-                        {
-                            editor.setVisible(true);
-                        }
-                    });
-                }
-            });
+            return false;
         }
     }
 }

src/main/java/io/github/dsheirer/module/decode/event/PlottableDecodeEvent.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.module.decode.event;
@@ -31,19 +30,20 @@ public class PlottableDecodeEvent extends DecodeEvent
     private double mHeading;
     private double mSpeed;
 
-    public PlottableDecodeEvent(long start)
+    public PlottableDecodeEvent(DecodeEventType decodeEventType, long start)
     {
-        super(start);
+        super(decodeEventType, start);
     }
 
     /**
      * Creates a new decode event builder with the specified start timestamp.
+     * @param decodeEventType for the event
      * @param timeStart for the event
      * @return builder
      */
-    public static PlottableDecodeEventBuilder plottableBuilder(long timeStart)
+    public static PlottableDecodeEventBuilder plottableBuilder(DecodeEventType decodeEventType, long timeStart)
     {
-        return new PlottableDecodeEventBuilder(timeStart);
+        return new PlottableDecodeEventBuilder(decodeEventType, timeStart);
     }
 
     /**
@@ -102,7 +102,7 @@ public class PlottableDecodeEvent extends DecodeEvent
     {
         private long mTimeStart;
         private long mDuration;
-        private String mEventDescription;
+        private DecodeEventType mDecodeEventType;
         private IdentifierCollection mIdentifierCollection;
         private IChannelDescriptor mChannelDescriptor;
         private String mDetails;
@@ -114,8 +114,9 @@ public class PlottableDecodeEvent extends DecodeEvent
         /**
          * Constructs a builder instance with the specified start time in milliseconds
          */
-        public PlottableDecodeEventBuilder(long timeStart)
+        public PlottableDecodeEventBuilder(DecodeEventType decodeEventType, long timeStart)
         {
+            mDecodeEventType = decodeEventType;
             mTimeStart = timeStart;
         }
 
@@ -149,16 +150,6 @@ public class PlottableDecodeEvent extends DecodeEvent
             return this;
         }
 
-        /**
-         * Sets the event description text
-         * @param description of the event
-         */
-        public PlottableDecodeEventBuilder eventDescription(String description)
-        {
-            mEventDescription = description;
-            return this;
-        }
-
         /**
          * Sets the identifier collection.
          * @param identifierCollection containing optional identifiers like TO, FROM, frequency and
@@ -222,11 +213,10 @@ public class PlottableDecodeEvent extends DecodeEvent
          */
         public PlottableDecodeEvent build()
         {
-            PlottableDecodeEvent decodeEvent = new PlottableDecodeEvent(mTimeStart);
+            PlottableDecodeEvent decodeEvent = new PlottableDecodeEvent(mDecodeEventType, mTimeStart);
             decodeEvent.setChannelDescriptor(mChannelDescriptor);
             decodeEvent.setDetails(mDetails);
             decodeEvent.setDuration(mDuration);
-            decodeEvent.setEventDescription(mEventDescription);
             decodeEvent.setIdentifierCollection(mIdentifierCollection);
             decodeEvent.setProtocol(mProtocol);
             decodeEvent.setLocation(mGeoPosition);
@@ -235,5 +225,4 @@ public class PlottableDecodeEvent extends DecodeEvent
             return decodeEvent;
         }
     }
-
 }

src/main/java/io/github/dsheirer/module/decode/event/filter/AllOtherEventFilter.java

@@ -0,0 +1,39 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.event.filter;
+
+import io.github.dsheirer.module.decode.event.DecodeEventType;
+
+/**
+ * Event filter for decode event types that are not specified in other event filters.
+ *
+ * This is intended as a catch-all for any elements of the DecodeEventType enumeration that may get added in the
+ * future and are not deliberately added to the various event filter groupings listed in the enumeration.
+ */
+public class AllOtherEventFilter extends EventFilter
+{
+    /**
+     * Constructor
+     */
+    public AllOtherEventFilter()
+    {
+        super("Other", DecodeEventType.OTHERS);
+    }
+}

src/main/java/io/github/dsheirer/module/decode/event/filter/DecodeEventFilterSet.java

@@ -1,16 +1,40 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.event.filter;
 
 import io.github.dsheirer.filter.FilterSet;
 import io.github.dsheirer.module.decode.event.IDecodeEvent;
 
-public class DecodeEventFilterSet extends FilterSet<IDecodeEvent> {
-    public DecodeEventFilterSet() {
-        super ("All Messages");
-
+/**
+ * Top-level decode event filter set.
+ */
+public class DecodeEventFilterSet extends FilterSet<IDecodeEvent>
+{
+    public DecodeEventFilterSet()
+    {
+        super ("All Events");
         addFilter(new DecodedCallEventFilter());
         addFilter(new DecodedCallEncryptedEventFilter());
         addFilter(new DecodedDataEventFilter());
         addFilter(new DecodedCommandEventFilter());
         addFilter(new DecodedRegistrationEventFilter());
+        addFilter(new AllOtherEventFilter());
     }
 }

src/main/java/io/github/dsheirer/module/decode/event/filter/DecodedCallEncryptedEventFilter.java

@@ -1,19 +1,36 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.event.filter;
 
 import io.github.dsheirer.module.decode.event.DecodeEventType;
 
-import java.util.Arrays;
-
+/**
+ * Encrypted call events filter
+ */
 public class DecodedCallEncryptedEventFilter extends EventFilter
 {
+    /**
+     * Constructs an instance
+     */
     public DecodedCallEncryptedEventFilter()
     {
-        super("Voice Calls - Encrypted", Arrays.asList(
-                DecodeEventType.CALL_ENCRYPTED,
-                DecodeEventType.CALL_GROUP_ENCRYPTED,
-                DecodeEventType.CALL_PATCH_GROUP_ENCRYPTED,
-                DecodeEventType.CALL_INTERCONNECT_ENCRYPTED,
-                DecodeEventType.CALL_UNIT_TO_UNIT_ENCRYPTED
-        ));
+        super("Voice Calls - Encrypted", DecodeEventType.VOICE_CALLS_ENCRYPTED);
     }
 }

src/main/java/io/github/dsheirer/module/decode/event/filter/DecodedCallEventFilter.java

@@ -1,25 +1,36 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.event.filter;
 
 import io.github.dsheirer.module.decode.event.DecodeEventType;
 
-import java.util.Arrays;
-
+/**
+ * Call events filter
+ */
 public class DecodedCallEventFilter extends EventFilter
 {
+    /**
+     * Constructs an instance
+     */
     public DecodedCallEventFilter()
     {
-        super("Voice Calls", Arrays.asList(
-                DecodeEventType.CALL_GROUP,
-                DecodeEventType.CALL_PATCH_GROUP,
-                DecodeEventType.CALL_ALERT,
-                DecodeEventType.CALL_DETECT,
-                DecodeEventType.CALL_DO_NOT_MONITOR,
-                DecodeEventType.CALL_END,
-                DecodeEventType.CALL_INTERCONNECT,
-                DecodeEventType.CALL_UNIQUE_ID,
-                DecodeEventType.CALL_UNIT_TO_UNIT,
-                DecodeEventType.CALL_NO_TUNER,
-                DecodeEventType.CALL_TIMEOUT
-        ));
+        super("Voice Calls", DecodeEventType.VOICE_CALLS);
     }
 }

src/main/java/io/github/dsheirer/module/decode/event/filter/DecodedCommandEventFilter.java

@@ -1,24 +1,36 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.event.filter;
 
 import io.github.dsheirer.module.decode.event.DecodeEventType;
 
-import java.util.Arrays;
-
+/**
+ * Event filter for network commands.
+ */
 public class DecodedCommandEventFilter extends EventFilter
 {
+    /**
+     * Constructs an instance
+     */
     public DecodedCommandEventFilter()
     {
-        super("Commands", Arrays.asList(
-                DecodeEventType.ANNOUNCEMENT,
-                DecodeEventType.STATION_ID,
-                DecodeEventType.PAGE,
-                DecodeEventType.QUERY,
-                DecodeEventType.RADIO_CHECK,
-                DecodeEventType.STATUS,
-                DecodeEventType.COMMAND,
-                DecodeEventType.EMERGENCY,
-                DecodeEventType.NOTIFICATION,
-                DecodeEventType.FUNCTION
-        ));
+        super("Commands", DecodeEventType.COMMANDS);
     }
 }

src/main/java/io/github/dsheirer/module/decode/event/filter/DecodedDataEventFilter.java

@@ -1,23 +1,36 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.event.filter;
 
 import io.github.dsheirer.module.decode.event.DecodeEventType;
 
-import java.util.Arrays;
-
+/**
+ * Event filter for data call event types
+ */
 public class DecodedDataEventFilter extends EventFilter
 {
+    /**
+     * Constructs an instance
+     */
     public DecodedDataEventFilter()
     {
-        super("Data Calls", Arrays.asList(
-                DecodeEventType.DATA_CALL,
-                DecodeEventType.DATA_CALL_ENCRYPTED,
-                DecodeEventType.DATA_PACKET,
-                DecodeEventType.GPS,
-                DecodeEventType.IP_PACKET,
-                DecodeEventType.UDP_PACKET,
-                DecodeEventType.SDM,
-                DecodeEventType.ID_ANI,
-                DecodeEventType.ID_UNIQUE
-        ));
+        super("Data Calls", DecodeEventType.DATA_CALLS);
     }
 }

src/main/java/io/github/dsheirer/module/decode/event/filter/DecodedRegistrationEventFilter.java

@@ -1,22 +1,36 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.event.filter;
 
 import io.github.dsheirer.module.decode.event.DecodeEventType;
 
-import java.util.Arrays;
-
+/**
+ * Event filter for registration related events
+ */
 public class DecodedRegistrationEventFilter extends EventFilter
 {
+    /**
+     * Constructor
+     */
     public DecodedRegistrationEventFilter()
     {
-        super("Registrations", Arrays.asList(
-                DecodeEventType.AFFILIATE,
-                DecodeEventType.AUTOMATIC_REGISTRATION_SERVICE,
-                DecodeEventType.REGISTER,
-                DecodeEventType.REGISTER_ESN,
-                DecodeEventType.DEREGISTER,
-                DecodeEventType.REQUEST,
-                DecodeEventType.RESPONSE,
-                DecodeEventType.RESPONSE_PACKET
-        ));
+        super("Registrations", DecodeEventType.REGISTRATION);
     }
 }

src/main/java/io/github/dsheirer/module/decode/event/filter/EventClearButton.java

@@ -1,15 +1,33 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.event.filter;
 
 import com.jidesoft.swing.JideSplitButton;
-
-import javax.swing.*;
-import javax.swing.event.ChangeEvent;
-import javax.swing.event.ChangeListener;
-import java.awt.event.ActionEvent;
-import java.awt.event.ActionListener;
 import java.awt.event.MouseEvent;
 import java.awt.event.MouseListener;
 
+import javax.swing.JLabel;
+import javax.swing.JPanel;
+import javax.swing.JSlider;
+import javax.swing.SwingUtilities;
+
 public class EventClearButton extends JideSplitButton
     {
         private static final long serialVersionUID = 1L;
@@ -21,37 +39,29 @@ public class EventClearButton extends JideSplitButton
 
             JPanel historyPanel = new JPanel();
 
-            historyPanel.add(new JLabel("History Entries:"));
-
+            historyPanel.add(new JLabel("History Size:"));
             final JSlider historySlider = initializeHistorySlider();
+            JLabel valueLabel = new JLabel(String.valueOf(maxHistoryCount));
 
             historySlider.setValue(maxHistoryCount);
-            historySlider.addChangeListener(new ChangeListener()
-            {
-                @Override
-                public void stateChanged(ChangeEvent arg0)
+            historySlider.addChangeListener(arg0 -> {
+                if (mEventClearHandler != null)
                 {
-                    if (mEventClearHandler != null)
-                    {
-                        mEventClearHandler.onHistoryLimitChanged(historySlider.getValue());
-                    }
+                    mEventClearHandler.onHistoryLimitChanged(historySlider.getValue());
                 }
+
+                valueLabel.setText(String.valueOf(historySlider.getValue()));
             });
 
             historyPanel.add(historySlider);
-
+            historyPanel.add(valueLabel);
             add(historyPanel);
 
             /* This handles the click action on the main button. Clear messages */
-            addActionListener(new ActionListener()
-            {
-                @Override
-                public void actionPerformed(ActionEvent e)
+            addActionListener(e -> {
+                if (mEventClearHandler != null)
                 {
-                    if (mEventClearHandler != null)
-                    {
-                        mEventClearHandler.onClearHistoryClicked();
-                    }
+                    mEventClearHandler.onClearHistoryClicked();
                 }
             });
         }

src/main/java/io/github/dsheirer/module/decode/event/filter/EventClearHandler.java

@@ -1,6 +1,37 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.event.filter;
 
-public interface EventClearHandler {
+/**
+ * Handler interface for changes to the event history size or content.
+ */
+public interface EventClearHandler
+{
+    /**
+     * Invoked when the retained history size limit is changed
+     * @param newHistoryLimit new size
+     */
     void onHistoryLimitChanged(int newHistoryLimit);
+
+    /**
+     * Invoked when the history is cleared
+     */
     void onClearHistoryClicked();
 }

src/main/java/io/github/dsheirer/module/decode/event/filter/EventFilter.java

@@ -1,56 +1,74 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.event.filter;
 
 import io.github.dsheirer.filter.Filter;
 import io.github.dsheirer.filter.FilterElement;
 import io.github.dsheirer.module.decode.event.DecodeEventType;
 import io.github.dsheirer.module.decode.event.IDecodeEvent;
-
-import java.util.ArrayList;
-import java.util.EnumMap;
-import java.util.List;
-import java.util.Map;
+import java.util.Collection;
+import java.util.function.Function;
 
 /**
  * This is used as a base for {@link IDecodeEvent} types.
  * This will take a list of {@link IDecodeEvent}s and generate filters for the list.
  * This will default canProcess to TRUE. Override if other value or evaluation is needed.
- *
  */
-public class EventFilter extends Filter<IDecodeEvent>
+public class EventFilter extends Filter<IDecodeEvent,DecodeEventType>
 {
-    private Map<DecodeEventType, FilterElement<DecodeEventType>> mElements = new EnumMap<>(DecodeEventType.class);
+    private EventKeyExtractor mKeyExtractor = new EventKeyExtractor();
 
-    public EventFilter(String name, List<DecodeEventType> eventTypes)
+    /**
+     * Constructs an instance
+     * @param name of this filter
+     * @param decodeEventTypes to filter against
+     */
+    public EventFilter(String name, Collection<DecodeEventType> decodeEventTypes)
     {
         super(name);
 
-        for (DecodeEventType eventType : eventTypes) {
-            mElements.put(eventType, new FilterElement<>(eventType));
-        }
-    }
-
-    @Override
-    public boolean passes(IDecodeEvent iDecodeEvent)
-    {
-        if (mEnabled && canProcess(iDecodeEvent))
+        for (DecodeEventType decodeEventType : decodeEventTypes)
         {
-            if (mElements.containsKey(iDecodeEvent.getEventType()))
-            {
-                return mElements.get(iDecodeEvent.getEventType()).isEnabled();
-            }
+            add(new FilterElement<>(decodeEventType));
         }
-        return false;
     }
 
+    /**
+     * Key extractor function
+     * @return function.
+     */
     @Override
-    public boolean canProcess(IDecodeEvent iDecodeEvent)
+    public Function<IDecodeEvent, DecodeEventType> getKeyExtractor()
     {
-        return true;
+        return mKeyExtractor;
     }
 
-    @Override
-    public List<FilterElement<?>> getFilterElements()
+    /**
+     * Key extractor function for decode events to extract the decode event type
+     */
+    public static class EventKeyExtractor implements Function<IDecodeEvent,DecodeEventType>
     {
-        return new ArrayList<>(mElements.values());
+        @Override
+        public DecodeEventType apply(IDecodeEvent iDecodeEvent)
+        {
+            return iDecodeEvent.getEventType();
+        }
     }
 }

src/main/java/io/github/dsheirer/module/decode/event/filter/EventFilterButton.java

@@ -1,84 +1,103 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.event.filter;
 
 import com.jidesoft.swing.JideButton;
 import io.github.dsheirer.filter.FilterEditorPanel;
 import io.github.dsheirer.filter.FilterSet;
-import net.miginfocom.swing.MigLayout;
-
-import javax.swing.*;
-import java.awt.*;
+import java.awt.EventQueue;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import net.miginfocom.swing.MigLayout;
 
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JScrollPane;
+
+/**
+ * Event filter button that includes split button functionality to allow user to select filter items.
+ *
+ * @param <T> type of filter.
+ */
 public class EventFilterButton<T> extends JideButton
 {
     private static final long serialVersionUID = 1L;
 
+    /**
+     * Constructs an instance
+     * @param dialogTitle for the dialog/panel that appears
+     * @param filterSet to include in the editor panel.
+     */
     public EventFilterButton(String dialogTitle, FilterSet<T> filterSet)
     {
         this("Filter", dialogTitle, filterSet);
     }
 
+    /**
+     * Constructs an instance
+     * @param buttonLabel to use on the button
+     * @param dialogTitle for the dialog/panel that appears
+     * @param filterSet to include in the editor panel.
+     */
     public EventFilterButton(String buttonLabel, String dialogTitle, FilterSet<T> filterSet)
     {
         super(buttonLabel);
-
-        addActionListener(
-                new EventFilterActionHandler(dialogTitle, filterSet)
-        );
+        addActionListener(new EventFilterActionHandler(dialogTitle, filterSet));
     }
 
+    /**
+     * Action handler for the button
+     */
     public class EventFilterActionHandler implements ActionListener
     {
-        private String title;
-        private FilterSet<T> filterSet;
+        private String mTitle;
+        private FilterSet<T> mFilterSet;
 
-        public EventFilterActionHandler( String title, FilterSet<T> filterSet)
+        /**
+         * Constructs an instance
+         * @param title for this panel
+         * @param filterSet to edit
+         */
+        public EventFilterActionHandler(String title, FilterSet<T> filterSet)
         {
-            this.title = title;
-            this.filterSet = filterSet;
+            mTitle = title;
+            mFilterSet = filterSet;
         }
 
         @Override
         public void actionPerformed(ActionEvent e)
         {
             final JFrame editor = new JFrame();
-
-            editor.setTitle(title);
+            editor.setTitle(mTitle);
             editor.setLocationRelativeTo(EventFilterButton.this);
             editor.setSize(600, 400);
             editor.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
-            editor.setLayout(new MigLayout("", "[grow,fill]",
-                    "[grow,fill][][]"));
-
-            FilterEditorPanel<T> panel = new FilterEditorPanel<T>(filterSet);
-
+            editor.setLayout(new MigLayout("", "[grow,fill]", "[grow,fill][][]"));
+            FilterEditorPanel<T> panel = new FilterEditorPanel<T>(mFilterSet);
             JScrollPane scroller = new JScrollPane(panel);
             scroller.setViewportView(panel);
-
             editor.add(scroller, "wrap");
-
-            editor.add(new JLabel("Right-click to select/deselect all nodes"), "wrap");
-
             JButton close = new JButton("Close");
-            close.addActionListener(new ActionListener()
-            {
-                @Override
-                public void actionPerformed(ActionEvent e)
-                {
-                    editor.dispose();
-                }
-            });
-
+            close.addActionListener(e1 -> editor.dispose());
             editor.add(close);
-
-            EventQueue.invokeLater(new Runnable()
-            {
-                public void run()
-                {
-                    editor.setVisible(true);
-                }
-            });
+            EventQueue.invokeLater(() -> editor.setVisible(true));
         }
     }
 }

src/main/java/io/github/dsheirer/module/decode/event/filter/EventFilterProvider.java

@@ -1,8 +0,0 @@
-package io.github.dsheirer.module.decode.event.filter;
-
-import io.github.dsheirer.filter.FilterSet;
-
-public interface EventFilterProvider<T> {
-    FilterSet<T> getFilterSet();
-    void setFilterSet(FilterSet<T> filterSet);
-}

src/main/java/io/github/dsheirer/module/decode/fleetsync2/Fleetsync2DecoderState.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.module.decode.fleetsync2;
 
@@ -33,13 +30,16 @@ import io.github.dsheirer.module.decode.event.PlottableDecodeEvent;
 import io.github.dsheirer.module.decode.fleetsync2.identifier.FleetsyncIdentifier;
 import io.github.dsheirer.module.decode.fleetsync2.message.Fleetsync2Message;
 import io.github.dsheirer.protocol.Protocol;
-
-import java.util.Set;
-import java.util.TreeSet;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 
 public class Fleetsync2DecoderState extends DecoderState
 {
-    private Set<FleetsyncIdentifier> mIdents = new TreeSet<>();
+    private Map<FleetsyncIdentifier,Integer> mFromIdentCountsMap = new HashMap<>();
+    private Map<FleetsyncIdentifier,Integer> mToIdentCountsMap = new HashMap<>();
 
     public Fleetsync2DecoderState()
     {
@@ -52,16 +52,6 @@ public class Fleetsync2DecoderState extends DecoderState
         return DecoderType.FLEETSYNC2;
     }
 
-    /**
-     * Resets the overall decoder state and clears any accumulated event details
-     */
-    @Override
-    public void reset()
-    {
-        super.reset();
-        mIdents.clear();
-    }
-
     @Override
     public void start()
     {
@@ -87,21 +77,37 @@ public class Fleetsync2DecoderState extends DecoderState
 
             getIdentifierCollection().update(fleetsync.getIdentifiers());
 
-            mIdents.add(fleetsync.getFromIdentifier());
-            mIdents.add(fleetsync.getToIdentifier());
+            FleetsyncIdentifier from = fleetsync.getFromIdentifier();
+
+            if(mFromIdentCountsMap.containsKey(from))
+            {
+                mFromIdentCountsMap.put(from, mFromIdentCountsMap.get(from) + 1);
+            }
+            else
+            {
+                mFromIdentCountsMap.put(from, 1);
+            }
+
+            FleetsyncIdentifier to = fleetsync.getToIdentifier();
+
+            if(to != null)
+            {
+                if(mToIdentCountsMap.containsKey(to))
+                {
+                    mToIdentCountsMap.put(to, mToIdentCountsMap.get(to) + 1);
+                }
+                else
+                {
+                    mToIdentCountsMap.put(to, 1);
+                }
+            }
 
             switch(fleetsync.getMessageType())
             {
                 case ANI:
                 case EMERGENCY:
                 case LONE_WORKER_EMERGENCY:
-                    DecodeEvent aniEvent = DecodeEvent.builder(fleetsync.getTimestamp())
-                        .channel(getCurrentChannel())
-                        .eventDescription(fleetsync.getMessageType().toString())
-                        .details(fleetsync.toString())
-                        .identifiers(getIdentifierCollection().copyOf())
-                        .build();
-
+                    DecodeEvent aniEvent = getDecodeEvent(fleetsync, getDecodeEventType(fleetsync.getMessageType()));
                     broadcast(aniEvent);
                     broadcast(new DecoderStateEvent(this, DecoderStateEvent.Event.DECODE, State.CALL));
                     break;
@@ -109,19 +115,13 @@ public class Fleetsync2DecoderState extends DecoderState
                 case PAGING:
                 case STATUS:
                 case UNKNOWN:
-                    DecodeEvent statusEvent = DecodeEvent.builder(fleetsync.getTimestamp())
-                        .channel(getCurrentChannel())
-                        .eventDescription(fleetsync.getMessageType().toString())
-                        .details(fleetsync.toString())
-                        .identifiers(getIdentifierCollection().copyOf())
-                        .build();
+                    DecodeEvent statusEvent = getDecodeEvent(fleetsync, getDecodeEventType(fleetsync.getMessageType()));
                     broadcast(statusEvent);
                     broadcast(new DecoderStateEvent(this, DecoderStateEvent.Event.DECODE, State.DATA));
                     break;
                 case GPS:
-                    PlottableDecodeEvent plottableDecodeEvent = PlottableDecodeEvent.plottableBuilder(fleetsync.getTimestamp())
+                    PlottableDecodeEvent plottableDecodeEvent = PlottableDecodeEvent.plottableBuilder(DecodeEventType.GPS, fleetsync.getTimestamp())
                         .channel(getCurrentChannel())
-                        .eventDescription(DecodeEventType.GPS.toString())
                         .details(fleetsync.toString())
                         .identifiers(getIdentifierCollection().copyOf())
                         .protocol(Protocol.FLEETSYNC)
@@ -135,6 +135,35 @@ public class Fleetsync2DecoderState extends DecoderState
         }
     }
 
+    private DecodeEvent getDecodeEvent(Fleetsync2Message fleetsync, DecodeEventType eventType) {
+        return DecodeEvent.builder(eventType, fleetsync.getTimestamp())
+                .channel(getCurrentChannel())
+                .details(fleetsync.getMessageType() + " " + fleetsync)
+                .identifiers(getIdentifierCollection().copyOf())
+                .protocol(Protocol.FLEETSYNC)
+                .build();
+    }
+
+    private DecodeEventType getDecodeEventType(FleetsyncMessageType fleetsyncMessageType) {
+        switch (fleetsyncMessageType) {
+            case ANI:
+                return DecodeEventType.ID_ANI;
+            case EMERGENCY:
+            case LONE_WORKER_EMERGENCY:
+                return DecodeEventType.EMERGENCY;
+            case ACKNOWLEDGE:
+                return DecodeEventType.ACKNOWLEDGE;
+            case PAGING:
+                return DecodeEventType.PAGE;
+            case STATUS:
+                return DecodeEventType.STATUS;
+            case GPS:
+                return DecodeEventType.GPS;
+            default:
+                return DecodeEventType.UNKNOWN;
+        }
+    }
+
     /**
      * Responds to reset events issued by the channel state
      */
@@ -158,17 +187,30 @@ public class Fleetsync2DecoderState extends DecoderState
 
         sb.append("=============================\n");
         sb.append("Decoder:\tFleetsync II\n\n");
-        sb.append("Fleetsync Idents\n");
 
-        if(mIdents.isEmpty())
+        if(mFromIdentCountsMap.isEmpty() && mToIdentCountsMap.isEmpty())
         {
+            sb.append("Fleetsync Idents\n");
             sb.append("  None\n");
         }
         else
         {
+            sb.append("Fleetsync From Idents\n");
 
-            for (FleetsyncIdentifier mIdent : mIdents) {
-                sb.append("  ").append(mIdent.formatted()).append("\n");
+            List<FleetsyncIdentifier> fromIdents = new ArrayList<>(mFromIdentCountsMap.keySet());
+            Collections.sort(fromIdents);
+            for(FleetsyncIdentifier from: fromIdents)
+            {
+                sb.append("  ").append(from.formatted()).append(" - Count:").append(mFromIdentCountsMap.get(from)).append("\n");
+            }
+
+            sb.append("\nFleetsync To Idents\n");
+
+            List<FleetsyncIdentifier> toIdents = new ArrayList<>(mToIdentCountsMap.keySet());
+            Collections.sort(toIdents);
+            for(FleetsyncIdentifier to: toIdents)
+            {
+                sb.append("  ").append(to.formatted()).append(" - Count:").append(mToIdentCountsMap.get(to)).append("\n");
             }
         }
 

src/main/java/io/github/dsheirer/module/decode/fleetsync2/FleetsyncMessageFilter.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.module.decode.fleetsync2;
@@ -24,52 +23,63 @@ import io.github.dsheirer.filter.Filter;
 import io.github.dsheirer.filter.FilterElement;
 import io.github.dsheirer.message.IMessage;
 import io.github.dsheirer.module.decode.fleetsync2.message.Fleetsync2Message;
-import io.github.dsheirer.module.decode.ltrnet.LtrNetMessageType;
+import java.util.function.Function;
 
-import java.util.*;
-
-public class FleetsyncMessageFilter extends Filter<IMessage>
+/**
+ * Filter for Fleetsync messages.
+ */
+public class FleetsyncMessageFilter extends Filter<IMessage,FleetsyncMessageType>
 {
-    private Map<FleetsyncMessageType,FilterElement<FleetsyncMessageType>> mElements = new EnumMap<>(FleetsyncMessageType.class);
+    private final KeyExtractor mKeyExtractor = new KeyExtractor();
 
+    /**
+     * Constructor
+     */
     public FleetsyncMessageFilter()
     {
-        super("Fleetsync Message Filter");
+        super("Fleetsync Messages");
 
         for(FleetsyncMessageType type : FleetsyncMessageType.values())
         {
-            if(type != FleetsyncMessageType.UNKNOWN)
-            {
-                mElements.put(type, new FilterElement<FleetsyncMessageType>(type));
-            }
+            add(new FilterElement<>(type));
         }
     }
 
-    @Override
-    public boolean passes(IMessage message)
-    {
-        if(mEnabled && canProcess(message))
-        {
-            Fleetsync2Message fleet = (Fleetsync2Message)message;
-
-            if(mElements.containsKey(fleet.getMessageType()))
-            {
-                return mElements.get(fleet.getMessageType()).isEnabled();
-            }
-        }
-
-        return false;
-    }
-
+    /**
+     * Limits processing to only fleetsync messages.
+     * @param message to test
+     * @return true if message type is correct.
+     */
     @Override
     public boolean canProcess(IMessage message)
     {
-        return message instanceof Fleetsync2Message;
+        return message instanceof Fleetsync2Message && super.canProcess(message);
     }
 
+    /**
+     * Key extractor for fleetsync messages
+     * @return key extractor
+     */
     @Override
-    public List<FilterElement<?>> getFilterElements()
+    public Function<IMessage, FleetsyncMessageType> getKeyExtractor()
     {
-        return new ArrayList<FilterElement<?>>(mElements.values());
+        return mKeyExtractor;
+    }
+
+    /**
+     * Key extractor for Fleetsync 2 Messages.
+     */
+    private class KeyExtractor implements Function<IMessage, FleetsyncMessageType>
+    {
+        @Override
+        public FleetsyncMessageType apply(IMessage message)
+        {
+            if(message instanceof Fleetsync2Message f2m)
+            {
+                return f2m.getMessageType();
+            }
+
+            return null;
+        }
     }
 }

src/main/java/io/github/dsheirer/module/decode/lj1200/LJ1200DecoderState.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.module.decode.lj1200;
 
@@ -30,14 +27,15 @@ import io.github.dsheirer.identifier.MutableIdentifierCollection;
 import io.github.dsheirer.message.IMessage;
 import io.github.dsheirer.module.decode.DecoderType;
 import io.github.dsheirer.module.decode.event.DecodeEvent;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
+import io.github.dsheirer.module.decode.event.DecodeEventType;
+import io.github.dsheirer.protocol.Protocol;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 import java.util.Set;
 import java.util.TreeSet;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class LJ1200DecoderState extends DecoderState
 {
@@ -72,11 +70,11 @@ public class LJ1200DecoderState extends DecoderState
                 ic.remove(IdentifierClass.USER);
                 ic.update(lj.getIdentifiers());
 
-                DecodeEvent event = DecodeEvent.builder(System.currentTimeMillis())
+                DecodeEvent event = DecodeEvent.builder(DecodeEventType.DATA_PACKET, System.currentTimeMillis())
+                    .protocol(Protocol.LOJACK)
                     .identifiers(ic)
                     .channel(getCurrentChannel())
-                    .details("LOJACK")
-                    .eventDescription(lj.toString())
+                    .details("LOJACK " + lj)
                     .build();
 
                 broadcast(event);
@@ -91,11 +89,11 @@ public class LJ1200DecoderState extends DecoderState
             ic.remove(IdentifierClass.USER);
             ic.update(transponder.getIdentifiers());
 
-            DecodeEvent transponderEvent = DecodeEvent.builder(System.currentTimeMillis())
+            DecodeEvent transponderEvent = DecodeEvent.builder(DecodeEventType.GPS, System.currentTimeMillis())
+                .protocol(Protocol.LOJACK)
                 .identifiers(ic)
                 .channel(getCurrentChannel())
-                .details("LOJACK TRANSPONDER")
-                .eventDescription(transponder.toString())
+                .details("LOJACK TRANSPONDER " + transponder)
                 .build();
 
             broadcast(transponderEvent);
@@ -114,7 +112,7 @@ public class LJ1200DecoderState extends DecoderState
         {
             sb.append("Transponder Addresses:\n");
 
-            List<String> addresses = new ArrayList<String>(mAddresses);
+            List<String> addresses = new ArrayList<>(mAddresses);
 
             Collections.sort(addresses);
 

src/main/java/io/github/dsheirer/module/decode/lj1200/LJ1200MessageFilter.java

@@ -1,52 +1,66 @@
-/*******************************************************************************
- *     SDR Trunk 
- *     Copyright (C) 2014,2015 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.module.decode.lj1200;
 
 import io.github.dsheirer.filter.Filter;
 import io.github.dsheirer.filter.FilterElement;
 import io.github.dsheirer.message.IMessage;
+import java.util.function.Function;
 
-import java.util.Collections;
-import java.util.List;
-
-public class LJ1200MessageFilter extends Filter<IMessage>
+/**
+ * Filter for LJ1200 messages
+ */
+public class LJ1200MessageFilter extends Filter<IMessage,String>
 {
+    private static final String LJ1200_KEY = "LJ-1200";
+    private final LJ1200KeyExtractor mKeyExtractor = new LJ1200KeyExtractor();
 
+    /**
+     * Constructor
+     */
     public LJ1200MessageFilter()
     {
-        super("LJ-1200 Message Filter");
-    }
-
-    @Override
-    public boolean passes(IMessage message)
-    {
-        return mEnabled && canProcess(message);
+        super("LJ-1200 Messages");
+        add(new FilterElement<>(LJ1200_KEY));
     }
 
     @Override
     public boolean canProcess(IMessage message)
     {
-        return message instanceof LJ1200Message || message instanceof LJ1200TransponderMessage;
+        return (message instanceof LJ1200Message || message instanceof LJ1200TransponderMessage);
     }
 
     @Override
-    public List<FilterElement<?>> getFilterElements()
+    public Function<IMessage, String> getKeyExtractor()
     {
-        return Collections.EMPTY_LIST;
+        return mKeyExtractor;
+    }
+
+    /**
+     * Key extractor
+     */
+    public class LJ1200KeyExtractor implements Function<IMessage,String>
+    {
+        @Override
+        public String apply(IMessage message)
+        {
+            return LJ1200_KEY;
+        }
     }
 }

src/main/java/io/github/dsheirer/module/decode/ltrnet/LTRNetDecodeEvent.java

@@ -0,0 +1,52 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.ltrnet;
+
+import io.github.dsheirer.module.decode.event.DecodeEvent;
+import io.github.dsheirer.module.decode.event.DecodeEventType;
+import io.github.dsheirer.protocol.Protocol;
+
+/**
+ * LTRNet decode event
+ */
+public class LTRNetDecodeEvent extends DecodeEvent
+{
+    /**
+     * Constructs an LTR NET decode event
+     * @param start
+     */
+    public LTRNetDecodeEvent(DecodeEventType decodeEventType, long start)
+    {
+        super(decodeEventType, start);
+        setProtocol(Protocol.LTR_NET);
+    }
+
+    /**
+     * Creates a new decode event builder with the specified start timestamp.
+     * @param timeStart for the event
+     * @return builder
+     */
+    public static DecodeEventBuilder builder(DecodeEventType decodeEventType, long timeStart)
+    {
+        DecodeEventBuilder decodeEventBuilder = new DecodeEventBuilder(decodeEventType, timeStart);
+        decodeEventBuilder.protocol(Protocol.LTR_NET);
+        return decodeEventBuilder;
+    }
+}

src/main/java/io/github/dsheirer/module/decode/ltrnet/LTRNetDecoder.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
@@ -20,15 +20,21 @@ package io.github.dsheirer.module.decode.ltrnet;
 
 import io.github.dsheirer.bits.MessageFramer;
 import io.github.dsheirer.bits.SyncPattern;
-import io.github.dsheirer.dsp.fsk.LTRDecoder;
 import io.github.dsheirer.message.MessageDirection;
 import io.github.dsheirer.module.decode.Decoder;
 import io.github.dsheirer.module.decode.DecoderType;
+import io.github.dsheirer.dsp.fsk.LTRDecoder;
 import io.github.dsheirer.sample.Listener;
 import io.github.dsheirer.sample.real.IRealBufferListener;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
+/**
+ * LTR-Net decoder
+ */
 public class LTRNetDecoder extends Decoder implements IRealBufferListener, Listener<float[]>
 {
+    private static final Logger mLog = LoggerFactory.getLogger(LTRNetDecoder.class);
     public static final int LTR_NET_MESSAGE_LENGTH = 40;
     protected LTRDecoder mLTRDecoder;
     private MessageFramer mLTRMessageFramer;
@@ -51,8 +57,12 @@ public class LTRNetDecoder extends Decoder implements IRealBufferListener, Liste
             mLTRMessageFramer = new MessageFramer(SyncPattern.LTR_STANDARD_ISW.getPattern(), LTR_NET_MESSAGE_LENGTH);
         }
 
-        mLTRDecoder.setMessageFramer(mLTRMessageFramer);
-        mLTRMessageFramer.setSyncDetectListener(mLTRDecoder);
+        mLTRDecoder.setListener(bits -> {
+            for(boolean bit: bits)
+            {
+                mLTRMessageFramer.process(bit);
+            }
+        });
         mLTRMessageProcessor = new LTRNetMessageProcessor(config.getMessageDirection());
         mLTRMessageFramer.addMessageListener(mLTRMessageProcessor);
         mLTRMessageProcessor.setMessageListener(getMessageListener());
@@ -64,7 +74,7 @@ public class LTRNetDecoder extends Decoder implements IRealBufferListener, Liste
      */
     public LTRNetDecoder(DecodeConfigLTRNet config)
     {
-        this(config, new LTRDecoder(LTR_NET_MESSAGE_LENGTH));
+        this(config, new LTRDecoder());
     }
 
     @Override
@@ -80,9 +90,9 @@ public class LTRNetDecoder extends Decoder implements IRealBufferListener, Liste
     }
 
     @Override
-    public void receive(float[] reusableFloatBuffer)
+    public void receive(float[] demodulatedSamples)
     {
-        mLTRDecoder.receive(reusableFloatBuffer);
+        mLTRDecoder.receive(demodulatedSamples);
     }
 
     @Override

src/main/java/io/github/dsheirer/module/decode/ltrnet/LTRNetDecoderInstrumented.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
@@ -27,7 +27,7 @@ public class LTRNetDecoderInstrumented extends LTRNetDecoder
 
     public LTRNetDecoderInstrumented(DecodeConfigLTRNet config)
     {
-        super(config, new LTRDecoderInstrumented(LTR_NET_MESSAGE_LENGTH));
+        super(config, new LTRDecoderInstrumented());
     }
 
     public LTRDecoderInstrumented getLTRDecoder()
@@ -36,9 +36,9 @@ public class LTRNetDecoderInstrumented extends LTRNetDecoder
     }
 
     @Override
-    public void receive(float[] realBuffer)
+    public void receive(float[] demodulatedSamples)
     {
-        super.receive(realBuffer);
+        super.receive(demodulatedSamples);
 
         bufferCount.setValue(bufferCount.intValue() + 1);
     }

src/main/java/io/github/dsheirer/module/decode/ltrnet/LTRNetDecoderState.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.module.decode.ltrnet;
 
@@ -38,6 +35,7 @@ import io.github.dsheirer.message.IMessage;
 import io.github.dsheirer.message.MessageDirection;
 import io.github.dsheirer.module.decode.DecoderType;
 import io.github.dsheirer.module.decode.event.DecodeEvent;
+import io.github.dsheirer.module.decode.event.DecodeEventType;
 import io.github.dsheirer.module.decode.ltrnet.channel.LtrNetChannel;
 import io.github.dsheirer.module.decode.ltrnet.identifier.LtrNetRadioIdentifier;
 import io.github.dsheirer.module.decode.ltrnet.message.LtrNetMessage;
@@ -60,9 +58,6 @@ import io.github.dsheirer.module.decode.ltrnet.message.osw.SystemIdle;
 import io.github.dsheirer.module.decode.ltrnet.message.osw.TransmitFrequencyHigh;
 import io.github.dsheirer.module.decode.ltrnet.message.osw.TransmitFrequencyLow;
 import io.github.dsheirer.protocol.Protocol;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
@@ -71,6 +66,8 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.TreeSet;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 public class LTRNetDecoderState extends DecoderState
 {
@@ -166,10 +163,24 @@ public class LTRNetDecoderState extends DecoderState
 
             if(mCurrentCallTalkgroup == null || !mCurrentCallTalkgroup.equals(talkgroup))
             {
+                DecodeEventType decodeEventType = null;
+
+                if(talkgroup.getTalkgroup() == 253)
+                {
+                    decodeEventType = DecodeEventType.REGISTER;
+                }
+                else if(talkgroup.getTalkgroup() == 254)
+                {
+                    decodeEventType = DecodeEventType.STATION_ID;
+                }
+                else
+                {
+                    decodeEventType = DecodeEventType.CALL;
+                }
+
                 getIdentifierCollection().remove(IdentifierClass.USER);
                 getIdentifierCollection().update(talkgroup);
-                mCurrentCallEvent = DecodeEvent.builder(timestamp)
-                    .protocol(Protocol.LTR_NET)
+                mCurrentCallEvent = LTRNetDecodeEvent.builder(decodeEventType, timestamp)
                     .channel(getCurrentChannel())
                     .identifiers(getIdentifierCollection().copyOf())
                     .build();
@@ -181,17 +192,14 @@ public class LTRNetDecoderState extends DecoderState
 
             if(talkgroup.getTalkgroup() == 253)
             {
-                mCurrentCallEvent.setEventDescription("Register");
                 broadcast(new DecoderStateEvent(this, Event.START, State.DATA));
             }
             else if(talkgroup.getTalkgroup() == 254)
             {
-                mCurrentCallEvent.setEventDescription("FCC CWID");
                 broadcast(new DecoderStateEvent(this, Event.START, State.DATA));
             }
             else
             {
-                mCurrentCallEvent.setEventDescription("Call");
                 broadcast(new DecoderStateEvent(this, Event.START, State.CALL));
             }
 
@@ -203,16 +211,7 @@ public class LTRNetDecoderState extends DecoderState
 
             if(decodeEvent == null)
             {
-                MutableIdentifierCollection ic = new MutableIdentifierCollection(getIdentifierCollection().getIdentifiers());
-                ic.remove(IdentifierClass.USER);
-                ic.update(talkgroup);
-
-                decodeEvent = DecodeEvent.builder(timestamp)
-                    .eventDescription("Call Detect")
-                    .channel(mChannelMap.get(channel))
-                    .protocol(Protocol.LTR_NET)
-                    .identifiers(ic)
-                    .build();
+                decodeEvent = getDecodeEvent(talkgroup, channel, timestamp, DecodeEventType.CALL_DETECT);
                 mCallDetectMap.put(channel, decodeEvent);
             }
             else
@@ -223,16 +222,7 @@ public class LTRNetDecoderState extends DecoderState
                 if(eventTalkgroup == null || !eventTalkgroup.equals(talkgroup) ||
                     (timestamp - decodeEvent.getTimeStart() - decodeEvent.getDuration() > 2000))
                 {
-                    MutableIdentifierCollection ic = new MutableIdentifierCollection(getIdentifierCollection().getIdentifiers());
-                    ic.remove(IdentifierClass.USER);
-                    ic.update(talkgroup);
-
-                    decodeEvent = DecodeEvent.builder(timestamp)
-                        .eventDescription("Call Detect")
-                        .channel(mChannelMap.get(channel))
-                        .protocol(Protocol.LTR_NET)
-                        .identifiers(ic)
-                        .build();
+                    decodeEvent = getDecodeEvent(talkgroup, channel, timestamp, DecodeEventType.CALL_DETECT);
                     mCallDetectMap.put(channel, decodeEvent);
                 }
             }
@@ -307,89 +297,59 @@ public class LTRNetDecoderState extends DecoderState
             switch(((LtrNetMessage)message).getLtrNetMessageType())
             {
                 case ISW_CALL_END:
-                    if(message instanceof IswCallEnd)
+                    if(message instanceof IswCallEnd callEnd)
                     {
-                        IswCallEnd callEnd = (IswCallEnd)message;
                         mTalkgroups.add(callEnd.getTalkgroup());
                         processCallEnd(callEnd.getChannel(), callEnd.getTalkgroup(), callEnd.getTimestamp());
                     }
                     break;
                 case ISW_CALL_START:
-                    if(message instanceof IswCallStart)
+                    if(message instanceof IswCallStart callStart)
                     {
-                        IswCallStart callStart = (IswCallStart)message;
                         mTalkgroups.add(callStart.getTalkgroup());
                         processCallStart(callStart.getChannel(), callStart.getTalkgroup(), callStart.getTimestamp(),
                             MessageDirection.ISW);
                     }
                     break;
                 case ISW_REGISTRATION_REQUEST_ESN_HIGH:
-                    if(message instanceof RegistrationRequestEsnHigh)
+                    if(message instanceof RegistrationRequestEsnHigh registrationRequestEsn)
                     {
-                        RegistrationRequestEsnHigh registrationRequestEsn = (RegistrationRequestEsnHigh)message;
-
                         if(registrationRequestEsn.isCompleteEsn())
                         {
                             getIdentifierCollection().update(registrationRequestEsn.getESN());
                             mESNIdentifiers.add(registrationRequestEsn.getESN());
                         }
 
-                        broadcast(DecodeEvent.builder(message.getTimestamp())
-                            .eventDescription("Registration Request")
-                            .details(registrationRequestEsn.toString())
-                            .identifiers(getIdentifierCollection().copyOf())
-                            .channel(getCurrentChannel())
-                            .protocol(Protocol.LTR_NET)
-                            .build());
+                        broadcast(getDecodeEvent(message, DecodeEventType.REQUEST, "REGISTER: " + registrationRequestEsn));
 
                         broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.DATA));
                     }
                     break;
                 case ISW_REGISTRATION_REQUEST_ESN_LOW:
-                    if(message instanceof RegistrationRequestEsnLow)
+                    if(message instanceof RegistrationRequestEsnLow registrationRequestEsn)
                     {
-                        RegistrationRequestEsnLow registrationRequestEsn = (RegistrationRequestEsnLow)message;
-
                         if(registrationRequestEsn.isCompleteEsn())
                         {
                             getIdentifierCollection().update(registrationRequestEsn.getESN());
                             mESNIdentifiers.add(registrationRequestEsn.getESN());
                         }
 
-                        broadcast(DecodeEvent.builder(message.getTimestamp())
-                            .eventDescription("Registration Request")
-                            .details(registrationRequestEsn.toString())
-                            .identifiers(getIdentifierCollection().copyOf())
-                            .channel(getCurrentChannel())
-                            .protocol(Protocol.LTR_NET)
-                            .build());
-
+                        broadcast(getDecodeEvent(message, DecodeEventType.REQUEST, "REGISTER: " + registrationRequestEsn));
                         broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.DATA));
                     }
                     break;
                 case ISW_REQUEST_ACCESS:
-                    if(message instanceof RequestAccess)
+                    if(message instanceof RequestAccess requestAccess)
                     {
-                        RequestAccess requestAccess = (RequestAccess)message;
-
                         getIdentifierCollection().update(requestAccess.getTalkgroup());
                         mTalkgroups.add(requestAccess.getTalkgroup());
-
-                        broadcast(DecodeEvent.builder(message.getTimestamp())
-                            .eventDescription("Access Request")
-                            .details(requestAccess.toString())
-                            .identifiers(getIdentifierCollection().copyOf())
-                            .channel(getCurrentChannel())
-                            .protocol(Protocol.LTR_NET)
-                            .build());
-
+                        broadcast(getDecodeEvent(message, DecodeEventType.REQUEST, "ACCESS: " + requestAccess));
                         broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.DATA));
                     }
                     break;
                 case ISW_UNIQUE_ID:
-                    if(message instanceof IswUniqueId)
+                    if(message instanceof IswUniqueId iswUniqueId)
                     {
-                        IswUniqueId iswUniqueId = (IswUniqueId)message;
                         getIdentifierCollection().update(iswUniqueId.getUniqueID());
                         mLtrNetRadioIdentifiers.add(iswUniqueId.getUniqueID());
                         updateCurrentCallIdentifiers();
@@ -400,104 +360,90 @@ public class LTRNetDecoderState extends DecoderState
                     broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.IDLE));
                     break;
                 case OSW_CALL_END:
-                    if(message instanceof OswCallEnd)
+                    if(message instanceof OswCallEnd callEnd)
                     {
-                        OswCallEnd callEnd = (OswCallEnd)message;
                         mTalkgroups.add(callEnd.getTalkgroup());
                         processCallEnd(callEnd.getChannel(), callEnd.getTalkgroup(), callEnd.getTimestamp());
                     }
                     break;
                 case OSW_CALL_START:
-                    if(message instanceof OswCallStart)
+                    if(message instanceof OswCallStart callStart)
                     {
-                        OswCallStart callStart = (OswCallStart)message;
                         mTalkgroups.add(callStart.getTalkgroup());
                         processCallStart(callStart.getChannel(), callStart.getTalkgroup(), callStart.getTimestamp(),
                             MessageDirection.OSW);
                     }
                     break;
                 case OSW_CHANNEL_MAP_HIGH:
-                    if(message instanceof ChannelMapHigh)
+                    if(message instanceof ChannelMapHigh channelMapHigh)
                     {
-                        mChannelMapHigh = (ChannelMapHigh)message;
+                        mChannelMapHigh = channelMapHigh;
                     }
                     broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.IDLE));
                     break;
                 case OSW_CHANNEL_MAP_LOW:
-                    if(message instanceof ChannelMapLow)
+                    if(message instanceof ChannelMapLow channelMapLow)
                     {
-                        mChannelMapLow = (ChannelMapLow)message;
+                        mChannelMapLow = channelMapLow;
                     }
                     broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.IDLE));
                     break;
                 case OSW_SYSTEM_IDLE:
-                    if(message instanceof SystemIdle)
+                    if(message instanceof SystemIdle systemIdle)
                     {
-                        setCurrentChannelNumber(((SystemIdle)message).getChannel());
+                        setCurrentChannelNumber(systemIdle.getChannel());
                     }
                     broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.IDLE));
                     break;
                 case OSW_NEIGHBOR_ID:
-                    if(message instanceof NeighborId)
+                    if(message instanceof NeighborId neighborId)
                     {
-                        NeighborId neighborId = (NeighborId)message;
                         mNeighborMap.put(neighborId.getNeighborRank(), neighborId);
                     }
                     broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.IDLE));
                     break;
                 case OSW_RECEIVE_FREQUENCY_HIGH:
-                    if(message instanceof ReceiveFrequencyHigh)
+                    if(message instanceof ReceiveFrequencyHigh receiveFrequency)
                     {
-                        ReceiveFrequencyHigh receiveFrequency = (ReceiveFrequencyHigh)message;
                         updateReceiveFrequency(receiveFrequency.getChannel(), receiveFrequency.getFrequency());
                     }
                     broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.IDLE));
                     break;
                 case OSW_RECEIVE_FREQUENCY_LOW:
-                    if(message instanceof ReceiveFrequencyLow)
+                    if(message instanceof ReceiveFrequencyLow receiveFrequency)
                     {
-                        ReceiveFrequencyLow receiveFrequency = (ReceiveFrequencyLow)message;
                         updateReceiveFrequency(receiveFrequency.getChannel(), receiveFrequency.getFrequency());
                     }
                     broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.IDLE));
                     break;
                 case OSW_REGISTRATION_ACCEPT:
-                    if(message instanceof RegistrationAccept)
+                    if(message instanceof RegistrationAccept registrationAccept)
                     {
-                        RegistrationAccept registrationAccept = (RegistrationAccept)message;
                         mLtrNetRadioIdentifiers.add(registrationAccept.getUniqueID());
                         MutableIdentifierCollection ic = new MutableIdentifierCollection(getIdentifierCollection().getIdentifiers());
                         ic.remove(IdentifierClass.USER);
                         ic.update(message.getIdentifiers());
 
-                        broadcast(DecodeEvent.builder(message.getTimestamp())
-                            .protocol(Protocol.LTR_NET)
-                            .channel(getCurrentChannel())
-                            .identifiers(ic)
-                            .eventDescription("Registration Accept")
-                            .details(registrationAccept.toString())
-                            .build());
+                        broadcast(getDecodeEvent(message, DecodeEventType.RESPONSE, "REGISTRATION ACCEPT: " + registrationAccept));
                     }
                     break;
                 case OSW_SITE_ID:
-                    if(message instanceof SiteId)
+                    if(message instanceof SiteId siteId)
                     {
-                        mCurrentSite = (SiteId)message;
+                        mCurrentSite = siteId;
                     }
                     broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.IDLE));
                     break;
                 case OSW_TRANSMIT_FREQUENCY_HIGH:
-                    if(message instanceof TransmitFrequencyHigh)
+                    if(message instanceof TransmitFrequencyHigh transmitFrequency)
                     {
-                        TransmitFrequencyHigh transmitFrequency = (TransmitFrequencyHigh)message;
                         updateTransmitFrequency(transmitFrequency.getChannel(), transmitFrequency.getFrequency());
                     }
                     broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.IDLE));
                     break;
                 case OSW_TRANSMIT_FREQUENCY_LOW:
-                    if(message instanceof TransmitFrequencyLow)
+                    if(message instanceof TransmitFrequencyLow transmitFrequency)
                     {
-                        TransmitFrequencyLow transmitFrequency = (TransmitFrequencyLow)message;
                         updateTransmitFrequency(transmitFrequency.getChannel(), transmitFrequency.getFrequency());
                     }
                     broadcast(new DecoderStateEvent(this, Event.CONTINUATION, State.IDLE));
@@ -509,6 +455,27 @@ public class LTRNetDecoderState extends DecoderState
         }
     }
 
+    private DecodeEvent getDecodeEvent(IMessage message, DecodeEventType decodeEventType, String details)
+    {
+        return LTRNetDecodeEvent.builder(decodeEventType, message.getTimestamp())
+                .details(details)
+                .identifiers(getIdentifierCollection().copyOf())
+                .channel(getCurrentChannel())
+                .build();
+    }
+
+    private DecodeEvent getDecodeEvent(LTRTalkgroup talkgroup, int channel, long timestamp, DecodeEventType decodeEventType)
+    {
+        MutableIdentifierCollection ic = new MutableIdentifierCollection(getIdentifierCollection().getIdentifiers());
+        ic.remove(IdentifierClass.USER);
+        ic.update(talkgroup);
+
+        return LTRNetDecodeEvent.builder(decodeEventType, timestamp)
+                .channel(mChannelMap.get(channel))
+                .identifiers(ic)
+                .build();
+    }
+
     @Override
     public String getActivitySummary()
     {

src/main/java/io/github/dsheirer/module/decode/ltrnet/LTRNetMessageFilter.java

@@ -1,52 +1,85 @@
+/*
+ * *****************************************************************************
+ * 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.module.decode.ltrnet;
 
 import io.github.dsheirer.filter.Filter;
 import io.github.dsheirer.filter.FilterElement;
 import io.github.dsheirer.message.IMessage;
 import io.github.dsheirer.module.decode.ltrnet.message.LtrNetMessage;
-import io.github.dsheirer.module.decode.ltrstandard.LtrStandardMessageType;
+import java.util.function.Function;
 
-import java.util.*;
-
-public class LTRNetMessageFilter extends Filter<IMessage>
+/**
+ * Filter for LTR-Net messages
+ */
+public class LTRNetMessageFilter extends Filter<IMessage,LtrNetMessageType>
 {
-    private Map<LtrNetMessageType, FilterElement<LtrNetMessageType>> mElements = new EnumMap<>(LtrNetMessageType.class);
+    private final KeyExtractor mKeyExtractor = new KeyExtractor();
 
+    /**
+     * Constructor
+     */
     public LTRNetMessageFilter()
     {
-        super("LTR-Net Message Filter");
+        super("LTR-Net Messages");
 
         for(LtrNetMessageType type: LtrNetMessageType.values())
         {
-            mElements.put(type, new FilterElement<>(type));
+            add(new FilterElement<>(type));
         }
     }
 
-    @Override
-    public boolean passes(IMessage message)
-    {
-        if(mEnabled && canProcess(message))
-        {
-            LtrNetMessage ltr = (LtrNetMessage) message;
-
-            if(mElements.containsKey(ltr.getLtrNetMessageType()))
-            {
-                return mElements.get(ltr.getLtrNetMessageType()).isEnabled();
-            }
-        }
-
-        return false;
-    }
-
+    /**
+     * Tests for instance of LTR-Net message
+     * @param message to test
+     * @return true if correct type.
+     */
     @Override
     public boolean canProcess(IMessage message)
     {
-        return message instanceof LtrNetMessage;
+        return message instanceof LtrNetMessage && super.canProcess(message);
     }
 
+    /**
+     * Key extractor for LTR-Net messages
+     * @return extractor
+     */
     @Override
-    public List<FilterElement<?>> getFilterElements()
+    public Function<IMessage, LtrNetMessageType> getKeyExtractor()
     {
-        return new ArrayList<FilterElement<?>>(mElements.values());
+        return mKeyExtractor;
+    }
+
+    /**
+     * Key extractor
+     */
+    private class KeyExtractor implements Function<IMessage,LtrNetMessageType>
+    {
+        @Override
+        public LtrNetMessageType apply(IMessage message)
+        {
+            if(message instanceof LtrNetMessage ltr)
+            {
+                return ltr.getLtrNetMessageType();
+            }
+
+            return null;
+        }
     }
 }

src/main/java/io/github/dsheirer/module/decode/ltrnet/message/LtrNetMessage.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.module.decode.ltrnet.message;
 
@@ -42,14 +41,25 @@ public abstract class LtrNetMessage extends Message
     protected CorrectedBinaryMessage mMessage;
     protected CRC mCRC;
     private LTRTalkgroup mTalkgroup;
+    private MessageDirection mMessageDirection;
 
     public LtrNetMessage(CorrectedBinaryMessage message, MessageDirection direction, long timestamp)
     {
         super(timestamp);
         mMessage = message;
+        mMessageDirection = direction;
         mCRC = CRCLTR.check(message, direction);
     }
 
+    /**
+     * Message direction: outbound (OSW) from the repeater or inbound (ISW) to the repeater
+     * @return message direction
+     */
+    public MessageDirection getMessageDirection()
+    {
+        return mMessageDirection;
+    }
+
     /**
      * Underlying binary message
      */