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wasapi:

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- fixed alignment missing for host buffer if overall buffer size was set to less than 3ms that results in device timeout
 - advanced Event driven mode and extended the range of host buffer size which can operate in this mode up up to 20.66 ms, e.g. your device buffer size will vary in range 3 - 20.66 ms, if goes above then Poll driven mode is switched on automatically
This commit is contained in:
dmitrykos 2010-08-06 20:25:07 +00:00
commit 9c7974c76c
2 changed files with 13 additions and 5 deletions
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14
src/hostapi/wasapi/pa_win_wasapi.c
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@ -2094,7 +2094,7 @@ static HRESULT CreateAudioClient(PaWasapiStream *pStream, PaWasapiSubStream *pSu
// Use Polling if overall latency is > 5ms as it allows to use 100% CPU in a callback,
// or user specified latency parameter
overall = MakeHnsPeriod(framesPerLatency, pSub->wavex.Format.nSamplesPerSec);
if ((overall > 50000) || (params->suggestedLatency > 0))
if ((overall >= (106667*2)/*21.33ms*/) || ((INT32)(params->suggestedLatency*100000.0) != 0/*0.01 msec granularity*/))
{
framesPerLatency = PaUtil_GetFramesPerHostBuffer(userFramesPerBuffer,
params->suggestedLatency, pSub->wavex.Format.nSamplesPerSec, 0/*,
@ -2124,12 +2124,22 @@ static HRESULT CreateAudioClient(PaWasapiStream *pStream, PaWasapiSubStream *pSu
if (pSub->shareMode == AUDCLNT_SHAREMODE_SHARED)
{
if (pSub->period < pInfo->DefaultDevicePeriod)
{
pSub->period = pInfo->DefaultDevicePeriod;
// Recalculate aligned period
framesPerLatency = MakeFramesFromHns(pSub->period, pSub->wavex.Format.nSamplesPerSec);
_CalculateAlignedPeriod(pSub, &framesPerLatency, ALIGN_BWD);
}
}
else
{
if (pSub->period < pInfo->MinimumDevicePeriod)
{
pSub->period = pInfo->MinimumDevicePeriod;
// Recalculate aligned period
framesPerLatency = MakeFramesFromHns(pSub->period, pSub->wavex.Format.nSamplesPerSec);
_CalculateAlignedPeriod(pSub, &framesPerLatency, ALIGN_BWD);
}
}
/*! Windows 7 does not allow to set latency lower than minimal device period and will
@ -2152,7 +2162,6 @@ static HRESULT CreateAudioClient(PaWasapiStream *pStream, PaWasapiSubStream *pSu
if (pSub->period > MAX_BUFFER_EVENT_DURATION)
{
pSub->period = MAX_BUFFER_EVENT_DURATION;
// Recalculate aligned period
framesPerLatency = MakeFramesFromHns(pSub->period, pSub->wavex.Format.nSamplesPerSec);
_CalculateAlignedPeriod(pSub, &framesPerLatency, ALIGN_BWD);
@ -2163,7 +2172,6 @@ static HRESULT CreateAudioClient(PaWasapiStream *pStream, PaWasapiSubStream *pSu
if (pSub->period > MAX_BUFFER_POLL_DURATION)
{
pSub->period = MAX_BUFFER_POLL_DURATION;
// Recalculate aligned period
framesPerLatency = MakeFramesFromHns(pSub->period, pSub->wavex.Format.nSamplesPerSec);
_CalculateAlignedPeriod(pSub, &framesPerLatency, ALIGN_BWD);