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WASAPI: Another attempt at fixing exclusive mode.

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Public issue https://github.com/mackron/miniaudio/issues/265
This commit is contained in:
David Reid
2021-01-26 07:46:36 +10:00
parent 47dccc520e
commit ee2e769406
1 changed files with 29 additions and 9 deletions
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miniaudio.h
+29 -9
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@@ -15074,21 +15074,41 @@ static ma_result ma_device__get_available_frames__wasapi(ma_device* pDevice, ma_
return MA_INVALID_OPERATION;
}
hr = ma_IAudioClient_GetCurrentPadding(pAudioClient, &paddingFramesCount);
if (FAILED(hr)) {
return ma_result_from_HRESULT(hr);
}
/*
I've had a report that GetCurrentPadding() is returning a frame count of 0 which is preventing
higher level function calls from doing anything because it thinks nothing is available. I have
taken a look at the documentation and it looks like this is unnecessary in exclusive mode.
/* Slightly different rules for exclusive and shared modes. */
From Microsoft's documentation:
For an exclusive-mode rendering or capture stream that was initialized with the
AUDCLNT_STREAMFLAGS_EVENTCALLBACK flag, the client typically has no use for the padding
value reported by GetCurrentPadding. Instead, the client accesses an entire buffer during
each processing pass.
Considering this, I'm going to skip GetCurrentPadding() for exclusive mode and just report the
entire buffer. This depends on the caller making sure they wait on the event handler.
*/
shareMode = ((ma_ptr)pAudioClient == pDevice->wasapi.pAudioClientPlayback) ? pDevice->playback.shareMode : pDevice->capture.shareMode;
if (shareMode == ma_share_mode_exclusive) {
*pFrameCount = paddingFramesCount;
} else {
if (shareMode == ma_share_mode_shared) {
/* Shared mode. */
hr = ma_IAudioClient_GetCurrentPadding(pAudioClient, &paddingFramesCount);
if (FAILED(hr)) {
return ma_result_from_HRESULT(hr);
}
if ((ma_ptr)pAudioClient == pDevice->wasapi.pAudioClientPlayback) {
*pFrameCount = pDevice->wasapi.actualPeriodSizeInFramesPlayback - paddingFramesCount;
} else {
*pFrameCount = paddingFramesCount;
}
} else {
/* Exclusive mode. */
if ((ma_ptr)pAudioClient == pDevice->wasapi.pAudioClientPlayback) {
*pFrameCount = pDevice->wasapi.actualPeriodSizeInFramesPlayback;
} else {
*pFrameCount = pDevice->wasapi.actualPeriodSizeInFramesCapture;
}
}
return MA_SUCCESS;
@@ -25637,7 +25657,7 @@ static OSStatus ma_on_input__coreaudio(void* pUserData, AudioUnitRenderActionFla
while (framesRemaining > 0) {
void* ppDeinterleavedBuffers[MA_MAX_CHANNELS];
ma_uint32 iChannel;
ma_uint32 framesToSend = sizeof(tempBuffer) / ma_get_bytes_per_sample(pDevice->capture.internalFormat);
ma_uint32 framesToSend = sizeof(tempBuffer) / ma_get_bytes_per_frame(pDevice->capture.internalFormat, pDevice->capture.internalChannels);
if (framesToSend > framesRemaining) {
framesToSend = framesRemaining;
}