REFERENCE_TIME CTimeStretchFilter::DrainBuffers(IMediaSample* pSample, REFERENCE_TIME rtNewStart)
{
Log("TS - DrainBuffers - rtNewStart: %6.3f", rtNewStart / 10000000.0);
uint unprocessedSamplesBefore = numUnprocessedSamples();
uint zeros = flushEx() - 32; // Magic 32 to keep the SoundTouch's output in sync
uint unprocessedSamplesAfter = numUnprocessedSamples();
UINT32 outFramesAfter = numSamples();
UINT32 totalSamples = zeros + unprocessedSamplesBefore;
UINT32 totalProcessedSamples = totalSamples - unprocessedSamplesAfter;
Log("TS - DrainBuffers - unprocessedSamplesBefore: %u zeros: %u unprocessedSamplesAfter: %u outFramesAfter: %u duration %6.3f",
unprocessedSamplesBefore, zeros, unprocessedSamplesAfter, outFramesAfter, (double)unprocessedSamplesBefore * (double) UNITS / (double) m_pOutputFormat->Format.nSamplesPerSec);
REFERENCE_TIME rtAHwTime = 0;
REFERENCE_TIME rtRCTime = 0;
REFERENCE_TIME estimatedExtraSampleDuration = (((int)zeros - (int)unprocessedSamplesAfter) * UNITS) / m_pOutputFormat->Format.nSamplesPerSec;
double bias = m_pClock->GetBias();
double adjustment = m_pClock->Adjustment();
m_pClock->GetHWTime(&rtRCTime, &rtAHwTime);
double AVMult = m_pClock->SuggestedAudioMultiplier(rtAHwTime, rtRCTime, bias, adjustment);
setTempoInternal(AVMult, 1.0);
CreateOutput(totalProcessedSamples, outFramesAfter, bias, adjustment, AVMult, true);
// Empty SoundTouch's buffers
clear();
pSample->SetDiscontinuity(false);
return estimatedExtraSampleDuration;
}
HRESULT CTimeStretchFilter::CheckSample(IMediaSample* pSample)
{
if (!pSample)
return S_OK;
AM_MEDIA_TYPE *pmt = NULL;
bool bFormatChanged = false;
HRESULT hr = S_OK;
if (SUCCEEDED(pSample->GetMediaType(&pmt)) && pmt)
bFormatChanged = !FormatsEqual((WAVEFORMATEXTENSIBLE*)pmt->pbFormat, m_pInputFormat);
if (bFormatChanged)
{
uint unprocessedSamplesBefore = numUnprocessedSamples();
uint zeros = flushEx();
uint unprocessedSamplesAfter = numUnprocessedSamples();
UINT32 outFramesAfter = numSamples();
UINT32 totalSamples = zeros + unprocessedSamplesBefore;
UINT32 totalProcessedSamples = totalSamples - unprocessedSamplesAfter;
//double bias = (double)totalProcessedSamples / (double)outFramesAfter;
REFERENCE_TIME estimatedSampleDuration = totalProcessedSamples * UNITS / m_pOutputFormat->Format.nSamplesPerSec;
double bias = m_pClock->GetBias();
double adjustment = m_pClock->Adjustment();
double AVMult = m_pClock->SuggestedAudioMultiplier(estimatedSampleDuration, bias, adjustment);
setTempoInternal(AVMult, 1.0);
CreateOutput(totalProcessedSamples, outFramesAfter, bias, adjustment, AVMult, true);
// Empty SoundTouch's buffers
clear();
// Apply format change
ChannelOrder chOrder;
hr = NegotiateFormat((WAVEFORMATEXTENSIBLE*)pmt->pbFormat, 1, &chOrder);
pSample->SetDiscontinuity(false);
if (FAILED(hr))
{
DeleteMediaType(pmt);
Log("CTimeStretchFilter::CheckFormat failed to change format: 0x%08x", hr);
return hr;
}
else
{
m_chOrder = chOrder;
return S_FALSE; // format changed
}
}
return S_OK;
}
