Added command line option to select audio output device (the same way…

… as Midi port)

Use -a:<audio_device_index> command line argument to specify audio output device..

src/mcu.cpp

@@ -1054,7 +1054,7 @@ static const char* audio_format_to_str(int format)
     return "UNK";
 }
 
-int MCU_OpenAudio(void)
+int MCU_OpenAudio(int deviceIndex)
 {
     SDL_AudioSpec spec = {};
     SDL_AudioSpec spec_actual = {};
@@ -1064,12 +1064,16 @@ int MCU_OpenAudio(void)
     spec.channels = 2;
     spec.callback = audio_callback;
     spec.samples = audio_page_size / 4;
+
+    const char* audioDevicename = SDL_GetAudioDeviceName(deviceIndex, 0);
 
-    sdl_audio = SDL_OpenAudioDevice(NULL, 0, &spec, &spec_actual, 0);
+    sdl_audio = SDL_OpenAudioDevice(audioDevicename, 0, &spec, &spec_actual, 0);
     if (!sdl_audio)
     {
         return 0;
     }
+
+    printf("Audio Device: %s\n", audioDevicename);
 
     printf("Audio Requested: F=%s, C=%d, R=%d, B=%d\n",
            audio_format_to_str(spec.format),
@@ -1151,6 +1155,7 @@ int main(int argc, char *argv[])
     std::string basePath;
 
     int port = 0;
+    int audioDeviceIndex = 0;
     bool autodetect = true;
 
     romset = ROM_SET_MK2;
@@ -1162,6 +1167,10 @@ int main(int argc, char *argv[])
             {
                 port = atoi(argv[i] + 3);
             }
+            else if (!strncmp(argv[i], "-a:", 3))
+            {
+                audioDeviceIndex = atoi(argv[i] + 3);
+            }
             else if (!strcmp(argv[i], "-mk2"))
             {
                 romset = ROM_SET_MK2;
@@ -1226,23 +1235,23 @@ int main(int argc, char *argv[])
         }
         printf("ROM set autodetect: %s\n", rs_name[romset]);
     }
-
-    mcu_mk1 = false;
-    mcu_cm300 = false;
+
+    mcu_mk1 = false;
+    mcu_cm300 = false;
     mcu_st = false;
-    switch (romset)
-    {
-        case ROM_SET_ST:
-            mcu_st = true;
-            break;
-        case ROM_SET_MK1:
-            mcu_mk1 = true;
-            mcu_st = false;
-            break;
-        case ROM_SET_CM300:
-            mcu_mk1 = true;
-            mcu_cm300 = true;
-            break;
+    switch (romset)
+    {
+        case ROM_SET_ST:
+            mcu_st = true;
+            break;
+        case ROM_SET_MK1:
+            mcu_mk1 = true;
+            mcu_st = false;
+            break;
+        case ROM_SET_CM300:
+            mcu_mk1 = true;
+            mcu_cm300 = true;
+            break;
     }
 
     std::string rpaths[5] =
@@ -1378,7 +1387,7 @@ int main(int argc, char *argv[])
         return 2;
     }
 
-    if (!MCU_OpenAudio())
+    if (!MCU_OpenAudio(audioDeviceIndex))
     {
         fprintf(stderr, "FATAL ERROR: Failed to open the audio stream.\n");
         fflush(stderr);