Check Pulseaudio server availability

src/audio.h

@@ -17,6 +17,8 @@
  * along with Moonlight; if not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <stdbool.h>
+
 #include "limelight-common/Limelight.h"
 
 extern const char* audio_device;
@@ -27,4 +29,5 @@ extern AUDIO_RENDERER_CALLBACKS audio_callbacks_sdl;
 #endif
 #ifdef HAVE_PULSE
 extern AUDIO_RENDERER_CALLBACKS audio_callbacks_pulse;
+bool audio_pulse_init();
 #endif

src/audio/pulse.c

@@ -34,6 +34,22 @@ static pa_simple *dev = NULL;
 static short pcmBuffer[FRAME_SIZE * MAX_CHANNEL_COUNT];
 static int channelCount;
 
+bool audio_pulse_init() {
+    pa_sample_spec spec = {
+      .format = PA_SAMPLE_S16LE,
+      .rate = 44000,
+      .channels = 2
+    };
+
+    int error;
+    dev = pa_simple_new(NULL, "Moonlight Embedded", PA_STREAM_PLAYBACK, NULL, "Streaming", &spec, NULL, NULL, &error);
+    if (dev) {
+        pa_simple_free(dev);
+        return true;
+    } else
+        return false;
+}
+
 static void pulse_renderer_init(int audioConfiguration, POPUS_MULTISTREAM_CONFIGURATION opusConfig) {
   int rc, error;
   unsigned char alsaMapping[6];

src/platform.c

@@ -89,7 +89,8 @@ AUDIO_RENDERER_CALLBACKS* platform_get_audio(enum platform system) {
   #endif
   default:
     #ifdef HAVE_PULSE
-    return &audio_callbacks_pulse;
+    if (audio_pulse_init())
+      return &audio_callbacks_pulse;
     #endif
     return &audio_callbacks_alsa;
   }