get rid of BeginLoopIteration

src/audio/SDL_audio.c

@@ -245,11 +245,6 @@ SDL_AudioThreadDeinit_Default(_THIS)
 {                               /* no-op. */
 }
 
-static void
-SDL_AudioBeginLoopIteration_Default(_THIS)
-{                               /* no-op. */
-}
-
 static void
 SDL_AudioWaitDevice_Default(_THIS)
 {                               /* no-op. */
@@ -346,7 +341,6 @@ finish_audio_entry_points_init(void)
     FILL_STUB(OpenDevice);
     FILL_STUB(ThreadInit);
     FILL_STUB(ThreadDeinit);
-    FILL_STUB(BeginLoopIteration);
     FILL_STUB(WaitDevice);
     FILL_STUB(PlayDevice);
     FILL_STUB(GetDeviceBuf);
@@ -704,7 +698,6 @@ SDL_RunAudio(void *devicep)
 
     /* Loop, filling the audio buffers */
     while (!SDL_AtomicGet(&device->shutdown)) {
-        current_audio.impl.BeginLoopIteration(device);
         data_len = device->callbackspec.size;
 
         /* Fill the current buffer with sound */
@@ -810,8 +803,6 @@ SDL_CaptureAudio(void *devicep)
         int still_need;
         Uint8 *ptr;
 
-        current_audio.impl.BeginLoopIteration(device);
-
         if (SDL_AtomicGet(&device->paused)) {
             SDL_Delay(delay);  /* just so we don't cook the CPU. */
             if (device->stream) {

src/audio/SDL_sysaudio.h

@@ -68,7 +68,6 @@ typedef struct SDL_AudioDriverImpl
     int (*OpenDevice) (_THIS, void *handle, const char *devname, int iscapture);
     void (*ThreadInit) (_THIS); /* Called by audio thread at start */
     void (*ThreadDeinit) (_THIS); /* Called by audio thread at end */
-    void (*BeginLoopIteration)(_THIS);  /* Called by audio thread at top of loop */
     void (*WaitDevice) (_THIS);
     void (*PlayDevice) (_THIS);
     Uint8 *(*GetDeviceBuf) (_THIS);

src/audio/wasapi/SDL_wasapi.c

@@ -691,12 +691,6 @@ WASAPI_ThreadDeinit(_THIS)
     WASAPI_PlatformThreadDeinit(this);
 }
 
-void
-WASAPI_BeginLoopIteration(_THIS)
-{
-    /* no-op. */
-}
-
 static void
 WASAPI_Deinitialize(void)
 {
@@ -727,7 +721,6 @@ WASAPI_Init(SDL_AudioDriverImpl * impl)
     impl->DetectDevices = WASAPI_DetectDevices;
     impl->ThreadInit = WASAPI_ThreadInit;
     impl->ThreadDeinit = WASAPI_ThreadDeinit;
-    impl->BeginLoopIteration = WASAPI_BeginLoopIteration;
     impl->OpenDevice = WASAPI_OpenDevice;
     impl->PlayDevice = WASAPI_PlayDevice;
     impl->WaitDevice = WASAPI_WaitDevice;

src/audio/wasapi/SDL_wasapi.h

@@ -74,7 +74,6 @@ int WASAPI_ActivateDevice(_THIS, const SDL_bool isrecovery);
 void WASAPI_PlatformThreadInit(_THIS);
 void WASAPI_PlatformThreadDeinit(_THIS);
 void WASAPI_PlatformDeleteActivationHandler(void *handler);
-void WASAPI_BeginLoopIteration(_THIS);
 
 #ifdef __cplusplus
 }