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DirectSound: Add some verbose debug output.

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This commit also experiments with a fix for glitching in full-duplex
mode.
This commit is contained in:
David Reid
2019-03-03 08:37:43 +10:00
parent be780d2558
commit 349abe5ac8
1 changed files with 19 additions and 6 deletions
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mini_al.h
+18 -5
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@@ -9681,15 +9681,23 @@ mal_result mal_device_main_loop__dsound(mal_device* pDevice)
} }
#ifdef MAL_DEBUG_OUTPUT #ifdef MAL_DEBUG_OUTPUT
//printf("[DirectSound] (Duplex/Playback) playCursorInBytes=%d, availableBytes=%d\n", playCursorInBytes, availableBytes); printf("[DirectSound] (Duplex/Playback) physicalPlayCursorInBytes=%d, availableBytes=%d\n", physicalPlayCursorInBytes, availableBytes);
#endif #endif
/* If there's no room available for writing we need to wait for more. */ /* If there's no room available for writing we need to wait for more. */
if (availableBytes == 0) { if (availableBytes < ((pDevice->playback.internalBufferSizeInFrames/pDevice->playback.internalPeriods)*bpfPlayback)) {
mal_sleep(waitTimeInMilliseconds); mal_sleep(waitTimeInMilliseconds);
continue; continue;
} }
#ifdef MAL_DEBUG_OUTPUT
if (isPlaybackDeviceStarted) {
if (availableBytes > (((pDevice->playback.internalBufferSizeInFrames/pDevice->playback.internalPeriods)*(pDevice->playback.internalPeriods-1)) * bpfPlayback)) {
printf("[DirectSound] (Duplex/Playback) Playback buffer starved. availableBytes=%d\n", availableBytes);
}
}
#endif
/* Getting here means there room available somewhere. We limit this to either the end of the buffer or the physical play cursor, whichever is closest. */ /* Getting here means there room available somewhere. We limit this to either the end of the buffer or the physical play cursor, whichever is closest. */
lockOffsetInBytesPlayback = virtualWriteCursorInBytesPlayback; lockOffsetInBytesPlayback = virtualWriteCursorInBytesPlayback;
@@ -9723,9 +9731,12 @@ mal_result mal_device_main_loop__dsound(mal_device* pDevice)
virtualWriteCursorLoopFlagPlayback = !virtualWriteCursorLoopFlagPlayback; virtualWriteCursorLoopFlagPlayback = !virtualWriteCursorLoopFlagPlayback;
} }
/* We may need to start the device. */ /*
We may need to start the device. We want two full periods to be written before starting the playback device. Having an extra period adds
a bit of a buffer to prevent the playback buffer from getting starved.
*/
framesWrittenToPlaybackDevice += framesWrittenThisIteration; framesWrittenToPlaybackDevice += framesWrittenThisIteration;
if (!isPlaybackDeviceStarted && framesWrittenToPlaybackDevice >= ((pDevice->playback.internalBufferSizeInFrames/pDevice->playback.internalPeriods)*2)) { if (!isPlaybackDeviceStarted && framesWrittenToPlaybackDevice >= ((pDevice->playback.internalBufferSizeInFrames/pDevice->playback.internalPeriods)*(pDevice->playback.internalPeriods-1))) {
if (FAILED(mal_IDirectSoundBuffer_Play((mal_IDirectSoundBuffer*)pDevice->dsound.pPlaybackBuffer, 0, 0, MAL_DSBPLAY_LOOPING))) { if (FAILED(mal_IDirectSoundBuffer_Play((mal_IDirectSoundBuffer*)pDevice->dsound.pPlaybackBuffer, 0, 0, MAL_DSBPLAY_LOOPING))) {
mal_IDirectSoundCaptureBuffer_Stop((mal_IDirectSoundCaptureBuffer*)pDevice->dsound.pCaptureBuffer); mal_IDirectSoundCaptureBuffer_Stop((mal_IDirectSoundCaptureBuffer*)pDevice->dsound.pCaptureBuffer);
return mal_post_error(pDevice, MAL_LOG_LEVEL_ERROR, "[DirectSound] IDirectSoundBuffer_Play() failed.", MAL_FAILED_TO_START_BACKEND_DEVICE); return mal_post_error(pDevice, MAL_LOG_LEVEL_ERROR, "[DirectSound] IDirectSoundBuffer_Play() failed.", MAL_FAILED_TO_START_BACKEND_DEVICE);
@@ -9775,7 +9786,9 @@ mal_result mal_device_main_loop__dsound(mal_device* pDevice)
} }
} }
/* Before returning we should drain the playback device. */ /* Getting here means the device is being stopped. */
/* The playback device should be drained before stopping. */
if (isPlaybackDeviceStarted) { if (isPlaybackDeviceStarted) {
/* TODO: Drain the playback device. */ /* TODO: Drain the playback device. */
} }