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Improve buffer metrics when using the MMDevAPI backend

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This commit is contained in:
Chris Robinson
2011-07-17 19:42:03 -07:00
parent c9b6bc848f
commit 55b893c784
1 changed files with 10 additions and 9 deletions
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Alc/mmdevapi.c
+10 -9
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@@ -258,8 +258,8 @@ static ALCboolean MMDevApiResetPlayback(ALCdevice *device)
MMDevApiData *data = device->ExtraData;
WAVEFORMATEXTENSIBLE OutputType;
WAVEFORMATEX *wfx = NULL;
REFERENCE_TIME def_per;
UINT32 buffer_len;
REFERENCE_TIME min_per;
UINT32 buffer_len, min_len;
HRESULT hr;
hr = IAudioClient_GetMixFormat(data->client, &wfx);
@@ -477,8 +477,9 @@ static ALCboolean MMDevApiResetPlayback(ALCdevice *device)
hr = IAudioClient_Initialize(data->client, AUDCLNT_SHAREMODE_SHARED, 0,
(ALuint64)device->UpdateSize * 10000000 /
device->Frequency * device->NumUpdates,
((ALuint64)device->UpdateSize*
device->NumUpdates*10000000 +
device->Frequency-1) / device->Frequency,
0, &OutputType.Format, NULL);
if(FAILED(hr))
{
@@ -486,7 +487,7 @@ static ALCboolean MMDevApiResetPlayback(ALCdevice *device)
return ALC_FALSE;
}
hr = IAudioClient_GetDevicePeriod(data->client, &def_per, NULL);
hr = IAudioClient_GetDevicePeriod(data->client, NULL, &min_per);
if(SUCCEEDED(hr))
hr = IAudioClient_GetBufferSize(data->client, &buffer_len);
if(FAILED(hr))
@@ -495,14 +496,14 @@ static ALCboolean MMDevApiResetPlayback(ALCdevice *device)
return ALC_FALSE;
}
device->NumUpdates = (ALuint)((REFERENCE_TIME)buffer_len * 10000000 /
device->Frequency / def_per);
min_len = (min_per*device->Frequency + 10000000-1) / 10000000;
device->UpdateSize = __max(device->UpdateSize, min_len);
device->NumUpdates = buffer_len / device->UpdateSize;
if(device->NumUpdates <= 1)
{
device->NumUpdates = 1;
ERR("Audio client returned default_period > buffer_len/2; expect break up\n");
ERR("Audio client returned min_period > buffer_len/2; expect break up\n");
}
device->UpdateSize = buffer_len / device->NumUpdates;
hr = IAudioClient_Start(data->client);
if(FAILED(hr))