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-rw-r--r--Alc/mmdevapi.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/Alc/mmdevapi.c b/Alc/mmdevapi.c
index 9feef4ad..39628c95 100644
--- a/Alc/mmdevapi.c
+++ b/Alc/mmdevapi.c
@@ -245,6 +245,8 @@ static ALCboolean MMDevApiResetPlayback(ALCdevice *device)
MMDevApiData *data = device->ExtraData;
WAVEFORMATEXTENSIBLE OutputType;
WAVEFORMATEX *wfx = NULL;
+ REFERENCE_TIME def_per;
+ UINT32 buffer_len;
HRESULT hr;
hr = IAudioClient_GetMixFormat(data->client, &wfx);
@@ -458,10 +460,28 @@ static ALCboolean MMDevApiResetPlayback(ALCdevice *device)
return ALC_FALSE;
}
+ hr = IAudioClient_GetDevicePeriod(data->client, &def_per, NULL);
+ if(SUCCEEDED(hr))
+ hr = IAudioClient_GetBufferSize(data->client, &buffer_len);
+ if(FAILED(hr))
+ {
+ AL_PRINT("Failed to get audio buffer info: 0x%08lx\n", hr);
+ return ALC_FALSE;
+ }
+
+ device->NumUpdates = (ALuint)((REFERENCE_TIME)buffer_len * 10000000 /
+ device->Frequency / def_per);
+ if(device->NumUpdates <= 1)
+ {
+ device->NumUpdates = 1;
+ AL_PRINT("Audio client returned default_period > buffer_len/2; expect break up\n");
+ }
+ device->UpdateSize = buffer_len / device->NumUpdates;
+
hr = IAudioClient_Start(data->client);
if(FAILED(hr))
{
- AL_PRINT("Failed to start audio client\n");
+ AL_PRINT("Failed to start audio client: 0x%08lx\n", hr);
return ALC_FALSE;
}