From 6a9aa076b839d7af08069a3cea359b24c3197d96 Mon Sep 17 00:00:00 2001
From: Jared Szechy <jared.szechy@gmail.com>
Date: Mon, 7 Jul 2014 20:21:39 -0400
Subject: [PATCH] Add option to display available portaudio devices.

---
 dsd_main.c |   7 +++-
 pa_devs.c  | 104 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 pa_devs.h  |   6 ++++
 3 files changed, 116 insertions(+), 1 deletion(-)
 create mode 100644 pa_devs.c
 create mode 100644 pa_devs.h

diff --git a/dsd_main.c b/dsd_main.c
index fe45a78..4c69990 100644
--- a/dsd_main.c
+++ b/dsd_main.c
@@ -26,6 +26,7 @@
 #include "provoice_const.h"
 #include "git_ver.h"
 #include "p25p1_heuristics.h"
+#include "pa_devs.h"
 
 
 int
@@ -273,6 +274,7 @@ usage ()
   printf ("  -g <num>      Audio output gain (default = 0 = auto, disable = -1)\n");
   printf ("  -n            Do not send synthesized speech to audio output device\n");
   printf ("  -w <file>     Output synthesized speech to a .wav file\n");
+  printf ("  -a            Display port audio devices\n");
   printf ("\n");
   printf ("Scanner control options:\n");
   printf ("  -B <num>      Serial port baud rate (default=115200)\n");
@@ -466,7 +468,7 @@ main (int argc, char **argv)
   exitflag = 0;
   signal (SIGINT, sigfun);
 
-  while ((c = getopt (argc, argv, "hep:qstv:z:i:o:d:g:nw:B:C:R:f:m:u:x:A:S:M:rl")) != -1)
+  while ((c = getopt (argc, argv, "haep:qstv:z:i:o:d:g:nw:B:C:R:f:m:u:x:A:S:M:rl")) != -1)
     {
       opterr = 0;
       switch (c)
@@ -474,6 +476,9 @@ main (int argc, char **argv)
         case 'h':
           usage ();
           exit (0);
+        case 'a':
+          printPortAudioDevices();
+          exit(0);
         case 'e':
           opts.errorbars = 1;
           opts.datascope = 0;
diff --git a/pa_devs.c b/pa_devs.c
new file mode 100644
index 0000000..f627c41
--- /dev/null
+++ b/pa_devs.c
@@ -0,0 +1,104 @@
+#include <stdio.h>
+
+#ifdef USE_PORTAUDIO
+#include <portaudio.h>
+
+#ifdef WIN32
+#include <windows.h>
+#endif
+
+void printPortAudioDevices()
+{
+    int     i, numDevices, defaultDisplayed;
+    const   PaDeviceInfo *deviceInfo;
+    PaStreamParameters inputParameters, outputParameters;
+    PaError err;
+
+
+    Pa_Initialize();
+
+    printf( "\nPortAudio version number = %d\nPortAudio version text = '%s'\n",
+            Pa_GetVersion(), Pa_GetVersionText() );
+
+
+    numDevices = Pa_GetDeviceCount();
+    if( numDevices < 0 )
+    {
+        printf( "ERROR: Pa_GetDeviceCount returned 0x%x\n", numDevices );
+        err = numDevices;
+        goto error;
+    }
+
+    printf( "Number of devices = %d\n", numDevices );
+    for( i=0; i<numDevices; i++ )
+    {
+        deviceInfo = Pa_GetDeviceInfo( i );
+        printf( "--------------------------------------- device #%d\n", i );
+
+    /* Mark global and API specific default devices */
+        defaultDisplayed = 0;
+        if( i == Pa_GetDefaultInputDevice() )
+        {
+            printf( "[ Default Input" );
+            defaultDisplayed = 1;
+        }
+        else if( i == Pa_GetHostApiInfo( deviceInfo->hostApi )->defaultInputDevice )
+        {
+            const PaHostApiInfo *hostInfo = Pa_GetHostApiInfo( deviceInfo->hostApi );
+            printf( "[ Default %s Input", hostInfo->name );
+            defaultDisplayed = 1;
+        }
+
+        if( i == Pa_GetDefaultOutputDevice() )
+        {
+            printf( (defaultDisplayed ? "," : "[") );
+            printf( " Default Output" );
+            defaultDisplayed = 1;
+        }
+        else if( i == Pa_GetHostApiInfo( deviceInfo->hostApi )->defaultOutputDevice )
+        {
+            const PaHostApiInfo *hostInfo = Pa_GetHostApiInfo( deviceInfo->hostApi );
+            printf( (defaultDisplayed ? "," : "[") );
+            printf( " Default %s Output", hostInfo->name );
+            defaultDisplayed = 1;
+        }
+
+        if( defaultDisplayed )
+            printf( " ]\n" );
+
+    /* print device info fields */
+#ifdef WIN32
+        {   /* Use wide char on windows, so we can show UTF-8 encoded device names */
+            wchar_t wideName[MAX_PATH];
+            MultiByteToWideChar(CP_UTF8, 0, deviceInfo->name, -1, wideName, MAX_PATH-1);
+            wprintf( L"Name                        = %s\n", wideName );
+        }
+#else
+        printf( "Name                        = %s\n", deviceInfo->name );
+#endif
+        printf( "Host API                    = %s\n",  Pa_GetHostApiInfo( deviceInfo->hostApi )->name );
+        printf( "Max inputs = %d", deviceInfo->maxInputChannels  );
+        printf( ", Max outputs = %d\n", deviceInfo->maxOutputChannels  );
+        printf( "Default sample rate         = %8.2f\n", deviceInfo->defaultSampleRate );
+    }
+
+    Pa_Terminate();
+
+    printf("----------------------------------------------\n");
+    return;
+
+error:
+    Pa_Terminate();
+    fprintf( stderr, "An error occured while using the portaudio stream\n" );
+    fprintf( stderr, "Error number: %d\n", err );
+    fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
+}
+
+#else
+
+void printPortAudioDevices()
+{
+    printf("PortAudio not supported in this build of dsd\n");
+}
+
+#endif
diff --git a/pa_devs.h b/pa_devs.h
new file mode 100644
index 0000000..9e6f65a
--- /dev/null
+++ b/pa_devs.h
@@ -0,0 +1,6 @@
+#ifndef PA_DEVS_H
+#define PA_DEVS_H
+
+void printPortAudioDevices();
+
+#endif