HRESULT WavStream::CreateAudioSample(IMFSample **ppSample)
{
HRESULT hr = S_OK;
IMFMediaBuffer *pBuffer = NULL;
IMFSample *pSample = NULL;
DWORD cbBuffer = 0;
BYTE *pData = NULL;
LONGLONG duration = 0;
// Start with one second of data, rounded up to the nearest block.
cbBuffer = AlignUp<DWORD>(m_pRiff->Format()->nAvgBytesPerSec, m_pRiff->Format()->nBlockAlign);
// Don't request any more than what's left.
cbBuffer = min(cbBuffer, m_pRiff->BytesRemainingInChunk());
// Create the buffer.
hr = MFCreateMemoryBuffer(cbBuffer, &pBuffer);
// Get a pointer to the buffer memory.
if (SUCCEEDED(hr))
{
hr = pBuffer->Lock(&pData, NULL, NULL);
}
// Fill the buffer
if (SUCCEEDED(hr))
{
hr = m_pRiff->ReadDataFromChunk(pData, cbBuffer);
}
// Unlock the buffer.
if (SUCCEEDED(hr))
{
hr = pBuffer->Unlock();
pData = NULL;
}
// Set the size of the valid data in the buffer.
if (SUCCEEDED(hr))
{
hr = pBuffer->SetCurrentLength(cbBuffer);
}
// Create a new sample and add the buffer to it.
if (SUCCEEDED(hr))
{
hr = MFCreateSample(&pSample);
}
if (SUCCEEDED(hr))
{
hr = pSample->AddBuffer(pBuffer);
}
// Set the time stamps, duration, and sample flags.
if (SUCCEEDED(hr))
{
hr = pSample->SetSampleTime(m_rtCurrentPosition);
}
if (SUCCEEDED(hr))
{
duration = AudioDurationFromBufferSize(m_pRiff->Format(), cbBuffer);
hr = pSample->SetSampleDuration(duration);
}
// Set the discontinuity flag.
if (SUCCEEDED(hr))
{
if (m_discontinuity)
{
hr = pSample->SetUINT32(MFSampleExtension_Discontinuity, TRUE);
}
}
if (SUCCEEDED(hr))
{
// Update our current position.
m_rtCurrentPosition += duration;
// Give the pointer to the caller.
*ppSample = pSample;
(*ppSample)->AddRef();
}
if (pData && pBuffer)
{
hr = pBuffer->Unlock();
}
SafeRelease(&pBuffer);
SafeRelease(&pSample);
return hr;
}
STDMETHODIMP CDecWMV9MFT::Decode(const BYTE *buffer, int buflen, REFERENCE_TIME rtStart, REFERENCE_TIME rtStop, BOOL bSyncPoint, BOOL bDiscontinuity, IMediaSample *pMediaSample)
{
HRESULT hr = S_OK;
DWORD dwStatus = 0;
hr = m_pMFT->GetInputStatus(0, &dwStatus);
if (FAILED(hr)) {
DbgLog((LOG_TRACE, 10, L"-> GetInputStatus() failed with hr: 0x%x", hr));
return S_FALSE;
}
if (!(dwStatus & MFT_INPUT_STATUS_ACCEPT_DATA))
return S_FALSE;
if (m_vc1Header && (m_bManualReorder || m_bNeedKeyFrame)) {
AVPictureType pictype = m_vc1Header->ParseVC1PictureType(buffer, buflen);
if (m_bManualReorder) {
if (pictype == AV_PICTURE_TYPE_I || pictype == AV_PICTURE_TYPE_P) {
if (m_bReorderBufferValid)
m_timestampQueue.push(m_rtReorderBuffer);
m_rtReorderBuffer = rtStart;
m_bReorderBufferValid = TRUE;
} else {
m_timestampQueue.push(rtStart);
}
}
if (m_bNeedKeyFrame) {
if (pictype != AV_PICTURE_TYPE_I) {
if (m_bManualReorder)
m_timestampQueue.pop();
return S_OK;
} else {
m_bNeedKeyFrame = FALSE;
bSyncPoint = TRUE;
}
}
}
IMFSample *pSample = nullptr;
hr = MF.CreateSample(&pSample);
if (FAILED(hr)) {
DbgLog((LOG_ERROR, 10, L"Unable to allocate MF Sample, hr: 0x%x", hr));
return E_FAIL;
}
IMFMediaBuffer *pMFBuffer = CreateMediaBuffer(buffer, buflen);
if (!pMFBuffer) {
DbgLog((LOG_TRACE, 10, L"Unable to allocate media buffer"));
SafeRelease(&pSample);
return E_FAIL;
}
pSample->AddBuffer(pMFBuffer);
if (rtStart != AV_NOPTS_VALUE) {
pSample->SetSampleTime(rtStart);
if (rtStop != AV_NOPTS_VALUE && rtStop > (rtStart - 1))
pSample->SetSampleDuration(rtStop - rtStart);
}
pSample->SetUINT32(MFSampleExtension_CleanPoint, bSyncPoint);
pSample->SetUINT32(MFSampleExtension_Discontinuity, bDiscontinuity);
hr = m_pMFT->ProcessInput(0, pSample, 0);
if (hr == MF_E_NOTACCEPTING) {
// Not accepting data right now, try to process output and try again
ProcessOutput();
hr = m_pMFT->ProcessInput(0, pSample, 0);
}
SafeRelease(&pMFBuffer);
SafeRelease(&pSample);
if (FAILED(hr)) {
DbgLog((LOG_TRACE, 10, L"-> ProcessInput failed with hr: 0x%x", hr));
return E_FAIL;
}
return ProcessOutput();
}
