C++ (Cpp) IMFMediaType::FreeRepresentation Examples

Example #1

File: DecoderMF.cpp Project: wolfg1969/Blackmagic-Decklink-SDK-Archive

// This is called from the DoProcessOutput method if the stream format
// has changed.
//
// Thread context: decoder thread
bool DecoderMF::HandleStreamChange()
{
	bool			ret = false;
	HRESULT			hr;
	DWORD			numOutputStreams;
	IMFMediaType*	mediaType = NULL;
	AM_MEDIA_TYPE*  mformt = NULL;

	hr = m_h264Decoder->GetStreamCount(NULL, &numOutputStreams);
	if (FAILED(hr))
		goto bail;

	if (numOutputStreams != 1)
		goto bail;

	hr = S_OK;
	int idx = 0;
	while (hr == S_OK)
	{
		hr = m_h264Decoder->GetOutputAvailableType(0, idx, &mediaType);
		if (FAILED(hr))
			goto bail;

		mediaType->GetRepresentation(FORMAT_MFVideoFormat , (LPVOID*)&mformt);
	    MFVIDEOFORMAT* z = (MFVIDEOFORMAT*)mformt->pbFormat;
		unsigned int format = z->surfaceInfo.Format;
		mediaType->FreeRepresentation(FORMAT_MFVideoFormat ,(LPVOID)mformt);

		if (format == '2YUY')
			break;

		++idx;
	}

	hr = m_h264Decoder->SetOutputType(0, mediaType, 0);
	if (FAILED(hr))
		goto bail;

	if (! CreateOutputSample())
		goto bail;

	if (m_previewWindow != NULL)
	{
		if (! m_previewWindow->SetMediaType(mediaType))
			goto bail;
		m_previewConfigured = true;
	}

	ret = true;

bail:
	if (mediaType != NULL)
		mediaType->Release();

	return ret;
}