我想使用EVR獨立發送,但是我無法將IMFSample發送給它。代碼清單如下,如何將IMFSample發送到EVR媒體接收器
//create the video render
IMFActivate* pActive = NULL;
hr = MFCreateVideoRendererActivate(m_hWnd, &pActive);
CHECK_HR(hr);
hr = pActive->ActivateObject(IID_IMFMediaSink,(void**)&m_pVideoSink) ;
CHECK_HR(hr);
hr = m_pVideoSink->GetStreamSinkByIndex(0,&m_pVideoStreamSink) ;
CHECK_HR(hr);
//on Sample ready from a custom mft
hr = m_pVideoStreamSink->ProcessSample(pSample) ;
然後我得到一個E_NOTIMPL錯誤。經過幾個小時的掙扎,我實現IMFVideoSampleAllocator:
//get IMFVideoSampleAllocator service
hr = MFGetService(m_pVideoStreamSink,MR_VIDEO_ACCELERATION_SERVICE,IID_PPV_ARGS(&m_pAllocator)) ;
CHECK_HR(hr);
//init IMFVideoSampleAllocator,pType is the negotiated type
hr = m_pAllocator->InitializeSampleAllocator(20,pType) ;
//On sample ready,pSample is the IMFSample from mft
IMFSample* pVideoSample = NULL ;
IMFMediaBuffer* pBuffer = NULL ;
LONGLONG hnsTimeStamp = 0 ;
//copy sample data from pSample to pVideoSample
CHECK_HR(hr = m_pAllocator->AllocateSample(&pVideoSample)) ;
CHECK_HR(hr = pSample->GetSampleTime(&hnsTimeStamp)) ;
CHECK_HR(hr = pVideoSample->SetSampleTime(hnsTimeStamp)) ;
CHECK_HR(hr = pSample->GetBufferByIndex(0,&pBuffer)) ;
CHECK_HR(hr = pVideoSample->AddBuffer(pBuffer)) ;
hr = m_pVideoStreamSink->ProcessSample(pVideoSample) ;
現在,每一件事情的偉大工程,但我只拿到了一個黑色的屏幕上繪製它沒有任何電影畫面!
此外,我增加了SAR到我的代碼,它工作得很好。
任何幫助,thx!