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DirectSound: Drain the playback buffer when stopping the device.

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This commit is contained in:
David Reid
2019-03-03 17:18:45 +10:00
parent 2e1c34e678
commit e00f3ddefa
1 changed files with 37 additions and 2 deletions
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mini_al.h
+37 -2
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@@ -9631,9 +9631,44 @@ mal_result mal_device_main_loop__dsound(mal_device* pDevice)
/* Getting here means the device is being stopped. */
/* The playback device should be drained before stopping. */
/* The playback device should be drained before stopping. All we do is wait until the available bytes is equal to the size of the buffer. */
if (isPlaybackDeviceStarted) {
/* TODO: Drain the playback device. */
for (;;) {
DWORD availableBytesPlayback = 0;
DWORD physicalPlayCursorInBytes;
DWORD physicalWriteCursorInBytes;
if (FAILED(mal_IDirectSoundBuffer_GetCurrentPosition((mal_IDirectSoundBuffer*)pDevice->dsound.pPlaybackBuffer, &physicalPlayCursorInBytes, &physicalWriteCursorInBytes))) {
break;
}
if (physicalPlayCursorInBytes < prevPlayCursorInBytesPlayback) {
physicalPlayCursorLoopFlagPlayback = !physicalPlayCursorLoopFlagPlayback;
}
prevPlayCursorInBytesPlayback = physicalPlayCursorInBytes;
if (physicalPlayCursorLoopFlagPlayback == virtualWriteCursorLoopFlagPlayback) {
/* Same loop iteration. The available bytes wraps all the way around from the virtual write cursor to the physical play cursor. */
if (physicalPlayCursorInBytes <= virtualWriteCursorInBytesPlayback) {
availableBytesPlayback = (pDevice->playback.internalBufferSizeInFrames*bpfPlayback) - virtualWriteCursorInBytesPlayback;
availableBytesPlayback += physicalPlayCursorInBytes; /* Wrap around. */
} else {
break;
}
} else {
/* Different loop iterations. The available bytes only goes from the virtual write cursor to the physical play cursor. */
if (physicalPlayCursorInBytes >= virtualWriteCursorInBytesPlayback) {
availableBytesPlayback = physicalPlayCursorInBytes - virtualWriteCursorInBytesPlayback;
} else {
break;
}
}
if (availableBytesPlayback >= (pDevice->playback.internalBufferSizeInFrames*bpfPlayback)) {
break;
}
mal_sleep(waitTimeInMilliseconds);
}
}
if (pDevice->type == mal_device_type_capture || pDevice->type == mal_device_type_duplex) {