1 files changed, 80 insertions, 0 deletions
diff --git a/comms/qsstv/files/patch-sound_soundalsa.cpp b/comms/qsstv/files/patch-sound_soundalsa.cpp
new file mode 100644
index 000000000000..10768b88f714
--- /dev/null
+++ b/comms/qsstv/files/patch-sound_soundalsa.cpp
@@ -0,0 +1,80 @@
+--- sound/soundalsa.cpp.orig	2019-04-18 09:34:09 UTC
++++ sound/soundalsa.cpp
+@@ -64,6 +64,8 @@ void soundAlsa::prepareCapture()
+ {
+   int err;
+   if(!soundDriverOK) return;
++  snd_pcm_drop(captureHandle);
++  snd_pcm_reset(captureHandle);
+   if((err=snd_pcm_prepare (captureHandle)) < 0)
+     {
+       alsaErrorHandler(err,"Unable to prepare "+inputAudioDevice);
+@@ -77,6 +79,8 @@ void soundAlsa::prepareCapture()
+ void soundAlsa::preparePlayback()
+ {
+   if(!soundDriverOK) return;
++  snd_pcm_drop(captureHandle);
++  snd_pcm_reset(captureHandle);
+   snd_pcm_prepare (playbackHandle);
+ }
+ 
+@@ -99,6 +103,8 @@ int soundAlsa::read(int &countAvailable)
+               if ( count == -EPIPE )
+                 {
+                   // Overrun
++                  snd_pcm_drop(captureHandle);
++                  snd_pcm_reset(captureHandle);
+                   snd_pcm_prepare (captureHandle );
+                   snd_pcm_start (captureHandle);
+                   errorOut() << "Overrun";
+@@ -153,6 +159,8 @@ int soundAlsa::write(uint numFrames)
+       else if ( framesWritten == -EPIPE )
+         {
+           /* underrun */
++          snd_pcm_drop(captureHandle);
++          snd_pcm_reset(captureHandle);
+           error = snd_pcm_prepare (playbackHandle);
+           if ( error < 0 )
+             {
+@@ -384,5 +392,41 @@ void getCardList(QStringList &alsaInputL
+       n++;
+     }
+   snd_device_name_free_hint(hints);
++
++	snd_config_t	*pcmc;
++	snd_pcm_t	*pcm;
++	if (!snd_config)
++		snd_config_update();
++	if(snd_config_search(snd_config, "pcm", &pcmc)==0) {
++		snd_config_iterator_t i, next;
++		snd_config_for_each(i, next, pcmc) {
++			snd_config_t *n = snd_config_iterator_entry(i);
++			if (snd_config_get_type(n) != SND_CONFIG_TYPE_COMPOUND)
++				continue;
++			const char *id;
++			if(snd_config_get_id(n, &id)==0) {
++				deviceName = QString(id);
++				if (deviceName == "hw" ||
++						deviceName == "plughw" ||
++						deviceName == "plug" ||
++						deviceName == "dsnoop" ||
++						deviceName == "tee" ||
++						deviceName == "file" ||
++						deviceName == "null" ||
++						deviceName == "shm" ||
++						deviceName == "cards" ||
++						deviceName == "rate_convert")
++					continue;
++				if (snd_pcm_open(&pcm, id, SND_PCM_STREAM_PLAYBACK, 0) == 0) {
++					alsaOutputList.append(deviceName + " ");
++					snd_pcm_close(pcm);
++				}
++				if (snd_pcm_open(&pcm, id, SND_PCM_STREAM_CAPTURE, 0) == 0) {
++					alsaInputList.append(deviceName + " ");
++					snd_pcm_close(pcm);
++				}
++			}
++		}
++	}
+ }
+