[client] audio: change the audio latency graph sample point

This removes the need for locking while also giving a better result in
the graph output. Also when the graph is disabled via the overlay
options it will no longer cause redraws.

client/include/app.h

@@ -116,7 +116,7 @@ typedef const char * (*GraphFormatFn)(const char * name,
 GraphHandle app_registerGraph(const char * name, RingBuffer buffer,
     float min, float max, GraphFormatFn formatFn);
 void app_unregisterGraph(GraphHandle handle);
-void app_invalidateGraphs(void);
+void app_invalidateGraph(GraphHandle handle);
 
 void app_overlayConfigRegister(const char * title,
     void (*callback)(void * udata, int * id), void * udata);

client/src/app.c

@@ -706,9 +706,9 @@ void app_unregisterGraph(GraphHandle handle)
   overlayGraph_unregister(handle);
 }
 
-void app_invalidateGraphs(void)
+void app_invalidateGraph(GraphHandle handle)
 {
-  overlayGraph_invalidate();
+  overlayGraph_invalidate(handle);
 }
 
 void app_registerOverlay(const struct LG_OverlayOps * ops, const void * params)

client/src/audio.c

@@ -100,7 +100,6 @@ typedef struct
     RingBuffer  buffer;
     RingBuffer  deviceTiming;
 
-    LG_Lock     lock;
     RingBuffer  timings;
     GraphHandle graph;
 
@@ -134,7 +133,7 @@ typedef struct
 }
 PlaybackDeviceTick;
 
-static void playbackStopNL(void);
+static void playbackStop(void);
 
 void audio_init(void)
 {
@@ -143,7 +142,6 @@ void audio_init(void)
     if (LG_AudioDevs[i]->init())
     {
       audio.audioDev = LG_AudioDevs[i];
-      LG_LOCK_INIT(audio.playback.lock);
       DEBUG_INFO("Using AudioDev: %s", audio.audioDev->name);
       return;
     }
@@ -157,15 +155,11 @@ void audio_free(void)
     return;
 
   // immediate stop of the stream, do not wait for drain
-  LG_LOCK(audio.playback.lock);
-  playbackStopNL();
-  LG_UNLOCK(audio.playback.lock);
-
+  playbackStop();
   audio_recordStop();
 
   audio.audioDev->free();
   audio.audioDev = NULL;
-  LG_LOCK_FREE(audio.playback.lock);
 }
 
 bool audio_supportsPlayback(void)
@@ -183,7 +177,7 @@ static const char * audioGraphFormatFn(const char * name,
   return title;
 }
 
-static void playbackStopNL(void)
+static void playbackStop(void)
 {
   if (audio.playback.state == STREAM_STATE_STOP)
     return;
@@ -274,11 +268,8 @@ static int playbackPullFrames(uint8_t * dst, int frames)
 
   if (audio.playback.state == STREAM_STATE_DRAIN &&
       ringbuffer_getCount(audio.playback.buffer) <= 0)
-  {
-    LG_LOCK(audio.playback.lock);
-    playbackStopNL();
-    LG_UNLOCK(audio.playback.lock);
-  }
+    playbackStop();
+
   return frames;
 }
 
@@ -288,13 +279,11 @@ void audio_playbackStart(int channels, int sampleRate, PSAudioFormat format,
   if (!audio.audioDev)
     return;
 
-  LG_LOCK(audio.playback.lock);
-
   if (audio.playback.state != STREAM_STATE_STOP)
   {
     // Stop the current playback immediately. Even if the format is compatible,
     // we may not have enough data left in the buffers to avoid underrunning
-    playbackStopNL();
+    playbackStop();
   }
 
   int srcError;
@@ -303,7 +292,7 @@ void audio_playbackStart(int channels, int sampleRate, PSAudioFormat format,
   if (!audio.playback.spiceData.src)
   {
     DEBUG_ERROR("Failed to create resampler: %s", src_strerror(srcError));
-    goto done;
+    return;
   }
 
   const int bufferFrames = sampleRate;
@@ -346,9 +335,6 @@ void audio_playbackStart(int channels, int sampleRate, PSAudioFormat format,
       audio.playback.timings, 0.0f, 100.0f, audioGraphFormatFn);
 
   audio.playback.state = STREAM_STATE_SETUP;
-
-done:
-  LG_UNLOCK(audio.playback.lock);
 }
 
 void audio_playbackStop(void)
@@ -418,7 +404,7 @@ void audio_playbackData(uint8_t * data, size_t size)
     if (!spiceData->framesIn)
     {
       DEBUG_ERROR("Failed to malloc framesIn");
-      playbackStopNL();
+      playbackStop();
       return;
     }
 
@@ -428,7 +414,7 @@ void audio_playbackData(uint8_t * data, size_t size)
     if (!spiceData->framesOut)
     {
       DEBUG_ERROR("Failed to malloc framesOut");
-      playbackStopNL();
+      playbackStop();
       return;
     }
   }
@@ -571,6 +557,15 @@ void audio_playbackData(uint8_t * data, size_t size)
     if (audio.audioDev->playback.start(frames))
       audio.playback.state = STREAM_STATE_RUN;
   }
+
+  int latencyFrames = ringbuffer_getCount(audio.playback.buffer);
+  if (audio.audioDev->playback.latency)
+    latencyFrames += audio.audioDev->playback.latency();
+
+  const float latency = latencyFrames /
+    (float)(audio.playback.sampleRate / 1000);
+  ringbuffer_push(audio.playback.timings, &latency);
+  app_invalidateGraph(audio.playback.graph);
 }
 
 bool audio_supportsRecord(void)
@@ -655,26 +650,4 @@ void audio_recordMute(bool mute)
   audio.audioDev->record.mute(mute);
 }
 
-void audio_tick(unsigned long long tickCount)
-{
-  LG_LOCK(audio.playback.lock);
-  if (!audio.playback.buffer)
-  {
-    LG_UNLOCK(audio.playback.lock);
-    return;
-  }
-
-  int frames = ringbuffer_getCount(audio.playback.buffer);
-  if (audio.audioDev->playback.latency)
-    frames += audio.audioDev->playback.latency();
-
-  const float latency = frames / (float)(audio.playback.sampleRate / 1000);
-
-  ringbuffer_push(audio.playback.timings, &latency);
-
-  LG_UNLOCK(audio.playback.lock);
-
-  app_invalidateGraphs();
-}
-
 #endif

client/src/audio.h

@@ -40,12 +40,9 @@ void audio_recordStop(void);
 void audio_recordVolume(int channels, const uint16_t volume[]);
 void audio_recordMute(bool mute);
 
-void audio_tick(unsigned long long tickCount);
-
 #else
 
 static inline void audio_init(void) {}
 static inline void audio_free(void) {}
-static inline void audio_tick(unsigned long long tickCount) {}
 
 #endif

client/src/main.c

@@ -155,8 +155,6 @@ static bool tickTimerFn(void * unused)
   if (needsRender)
     app_invalidateWindow(false);
 
-  audio_tick(tickCount);
-
   ++tickCount;
   return true;
 }

client/src/overlay/graphs.c

@@ -245,10 +245,11 @@ void overlayGraph_iterate(void (*callback)(GraphHandle handle, const char * name
   ll_unlock(gs.graphs);
 }
 
-void overlayGraph_invalidate(void)
+void overlayGraph_invalidate(GraphHandle handle)
 {
   if (!gs.show)
     return;
 
-  app_invalidateWindow(false);
+  if (handle->enabled)
+    app_invalidateWindow(false);
 }

client/src/overlays.h

@@ -47,7 +47,7 @@ GraphHandle overlayGraph_register(const char * name, RingBuffer buffer,
 void overlayGraph_unregister();
 void overlayGraph_iterate(void (*callback)(GraphHandle handle, const char * name,
     bool * enabled, void * udata), void * udata);
-void overlayGraph_invalidate(void);
+void overlayGraph_invalidate(GraphHandle handle);
 
 void overlayConfig_register(const char * title,
     void (*callback)(void * udata, int * id), void * udata);