Я пытаюсь выполнить рендеринг видео, используя пример Microsoft DX11VideoRenderer , найденный по адресу: https://github.com/Microsoft/Windows-classic-samples/tree/master/Samples/DX11VideoRenderer
Из моего обширного исследования кажется, что использование DirectX 11 с аппаратным ускорением является наиболее современным методом (наименее вероятным, чтобы его не рекомендовали) и предлагает лучшее решение для повышения производительности.
В Presenter.cpp есть 2 аналогичные функции, которые обрабатывают кадры, но я не могу понять, в чем разница между ними. ProcessFrameUsingD3D11() использует VideoProcessorBlt() для фактического рендеринга. Тайна в том, что ProcessFrameUsingXVP() не использует эту функцию, так как же она на самом деле выполняет рендеринг? Или это делает что-то еще полностью? Также кажется, что моя реализация использует ProcessFrameUsingXVP(), основанную на значении переменной m_useXVP, которая по умолчанию установлена в '1'. Вот пример кода:
if (m_useXVP)
{
BOOL bInputFrameUsed = FALSE;
hr = ProcessFrameUsingXVP( pCurrentType, pSample, pTexture2D, rcDest, ppOutputSample, &bInputFrameUsed );
if (SUCCEEDED(hr) && !bInputFrameUsed)
{
*pbProcessAgain = TRUE;
}
}
else
{
hr = ProcessFrameUsingD3D11( pTexture2D, pEVTexture2D, dwViewIndex, dwEVViewIndex, rcDest, *punInterlaceMode, ppOutputSample );
LONGLONG hnsDuration = 0;
LONGLONG hnsTime = 0;
DWORD dwSampleFlags = 0;
if (ppOutputSample != NULL && *ppOutputSample != NULL)
{
if (SUCCEEDED(pSample->GetSampleDuration(&hnsDuration)))
{
(*ppOutputSample)->SetSampleDuration(hnsDuration);
}
if (SUCCEEDED(pSample->GetSampleTime(&hnsTime)))
{
(*ppOutputSample)->SetSampleTime(hnsTime);
}
if (SUCCEEDED(pSample->GetSampleFlags(&dwSampleFlags)))
{
(*ppOutputSample)->SetSampleFlags(dwSampleFlags);
}
}
}
Причина установки m_useXVP также является для меня загадкой, и я не могу найти ответ в своем исследовании. Он использует раздел реестра, который не существует на моем конкретном ПК с Windows10, поэтому значение не изменяется.
const TCHAR* lpcszInVP = TEXT("XVP");
const TCHAR* lpcszREGKEY = TEXT("SOFTWARE\\Microsoft\\Scrunch\\CodecPack\\MSDVD");
if(0 == RegOpenKeyEx(HKEY_CURRENT_USER, lpcszREGKEY, 0, KEY_READ, &hk))
{
dwData = 0;
cbData = sizeof(DWORD);
if (0 == RegQueryValueEx(hk, lpcszInVP, 0, &cbType, (LPBYTE)&dwData, &cbData))
{
m_useXVP = dwData;
}
}
Так как мой компьютер не имеет этого ключа, код по умолчанию использует ProcessFrameUsingXVP(). Вот определение:
HRESULT DX11VideoRenderer::CPresenter::ProcessFrameUsingXVP(IMFMediaType* pCurrentType, IMFSample* pVideoFrame, ID3D11Texture2D* pTexture2D, RECT rcDest, IMFSample** ppVideoOutFrame, BOOL* pbInputFrameUsed)
{
HRESULT hr = S_OK;
ID3D11VideoContext* pVideoContext = NULL;
ID3D11Texture2D* pDXGIBackBuffer = NULL;
IMFSample* pRTSample = NULL;
IMFMediaBuffer* pBuffer = NULL;
IMFAttributes* pAttributes = NULL;
D3D11_VIDEO_PROCESSOR_CAPS vpCaps = { 0 };
do
{
if (!m_pDX11VideoDevice)
{
hr = m_pD3D11Device->QueryInterface(__uuidof(ID3D11VideoDevice), (void**)&m_pDX11VideoDevice);
if (FAILED(hr))
{
break;
}
}
hr = m_pD3DImmediateContext->QueryInterface(__uuidof(ID3D11VideoContext), (void**)&pVideoContext);
if (FAILED(hr))
{
break;
}
// remember the original rectangles
RECT TRectOld = m_rcDstApp;
RECT SRectOld = m_rcSrcApp;
UpdateRectangles(&TRectOld, &SRectOld);
//Update destination rect with current client rect
m_rcDstApp = rcDest;
D3D11_TEXTURE2D_DESC surfaceDesc;
pTexture2D->GetDesc(&surfaceDesc);
BOOL fTypeChanged = FALSE;
if (!m_pVideoProcessorEnum || !m_pSwapChain1 || m_imageWidthInPixels != surfaceDesc.Width || m_imageHeightInPixels != surfaceDesc.Height)
{
SafeRelease(m_pVideoProcessorEnum);
SafeRelease(m_pSwapChain1);
m_imageWidthInPixels = surfaceDesc.Width;
m_imageHeightInPixels = surfaceDesc.Height;
fTypeChanged = TRUE;
D3D11_VIDEO_PROCESSOR_CONTENT_DESC ContentDesc;
ZeroMemory(&ContentDesc, sizeof(ContentDesc));
ContentDesc.InputFrameFormat = D3D11_VIDEO_FRAME_FORMAT_INTERLACED_TOP_FIELD_FIRST;
ContentDesc.InputWidth = surfaceDesc.Width;
ContentDesc.InputHeight = surfaceDesc.Height;
ContentDesc.OutputWidth = surfaceDesc.Width;
ContentDesc.OutputHeight = surfaceDesc.Height;
ContentDesc.Usage = D3D11_VIDEO_USAGE_PLAYBACK_NORMAL;
hr = m_pDX11VideoDevice->CreateVideoProcessorEnumerator(&ContentDesc, &m_pVideoProcessorEnum);
if (FAILED(hr))
{
break;
}
m_rcSrcApp.left = 0;
m_rcSrcApp.top = 0;
m_rcSrcApp.right = m_uiRealDisplayWidth;
m_rcSrcApp.bottom = m_uiRealDisplayHeight;
if (m_b3DVideo)
{
hr = m_pVideoProcessorEnum->GetVideoProcessorCaps(&vpCaps);
if (FAILED(hr))
{
break;
}
if (vpCaps.FeatureCaps & D3D11_VIDEO_PROCESSOR_FEATURE_CAPS_STEREO)
{
m_bStereoEnabled = TRUE;
}
DXGI_MODE_DESC1 modeFilter = { 0 };
modeFilter.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
modeFilter.Width = surfaceDesc.Width;
modeFilter.Height = surfaceDesc.Height;
modeFilter.Stereo = m_bStereoEnabled;
DXGI_MODE_DESC1 matchedMode;
if (m_bFullScreenState)
{
hr = m_pDXGIOutput1->FindClosestMatchingMode1(&modeFilter, &matchedMode, m_pD3D11Device);
if (FAILED(hr))
{
break;
}
}
hr = m_pXVP->GetAttributes(&pAttributes);
if (FAILED(hr))
{
break;
}
hr = pAttributes->SetUINT32(MF_ENABLE_3DVIDEO_OUTPUT, (0 != m_vp3DOutput) ? MF3DVideoOutputType_Stereo : MF3DVideoOutputType_BaseView);
if (FAILED(hr))
{
break;
}
}
}
// now create the input and output media types - these need to reflect
// the src and destination rectangles that we have been given.
RECT TRect = m_rcDstApp;
RECT SRect = m_rcSrcApp;
UpdateRectangles(&TRect, &SRect);
const BOOL fDestRectChanged = !EqualRect(&TRect, &TRectOld);
const BOOL fSrcRectChanged = !EqualRect(&SRect, &SRectOld);
if (!m_pSwapChain1 || fDestRectChanged)
{
hr = UpdateDXGISwapChain();
if (FAILED(hr))
{
break;
}
}
if (fTypeChanged || fSrcRectChanged || fDestRectChanged)
{
// stop streaming to avoid multiple start\stop calls internally in XVP
hr = m_pXVP->ProcessMessage(MFT_MESSAGE_NOTIFY_END_STREAMING, 0);
if (FAILED(hr))
{
break;
}
if (fTypeChanged)
{
hr = SetXVPOutputMediaType(pCurrentType, DXGI_FORMAT_B8G8R8A8_UNORM);
if (FAILED(hr))
{
break;
}
}
if (fDestRectChanged)
{
hr = m_pXVPControl->SetDestinationRectangle(&m_rcDstApp);
if (FAILED(hr))
{
break;
}
}
if (fSrcRectChanged)
{
hr = m_pXVPControl->SetSourceRectangle(&SRect);
if (FAILED(hr))
{
break;
}
}
hr = m_pXVP->ProcessMessage(MFT_MESSAGE_NOTIFY_BEGIN_STREAMING, 0);
if (FAILED(hr))
{
break;
}
}
m_bCanProcessNextSample = FALSE;
// Get Backbuffer
hr = m_pSwapChain1->GetBuffer(0, __uuidof(ID3D11Texture2D), (void**)&pDXGIBackBuffer);
if (FAILED(hr))
{
break;
}
// create the output media sample
hr = MFCreateSample(&pRTSample);
if (FAILED(hr))
{
break;
}
hr = MFCreateDXGISurfaceBuffer(__uuidof(ID3D11Texture2D), pDXGIBackBuffer, 0, FALSE, &pBuffer);
if (FAILED(hr))
{
break;
}
hr = pRTSample->AddBuffer(pBuffer);
if (FAILED(hr))
{
break;
}
if (m_b3DVideo && 0 != m_vp3DOutput)
{
SafeRelease(pBuffer);
hr = MFCreateDXGISurfaceBuffer(__uuidof(ID3D11Texture2D), pDXGIBackBuffer, 1, FALSE, &pBuffer);
if (FAILED(hr))
{
break;
}
hr = pRTSample->AddBuffer(pBuffer);
if (FAILED(hr))
{
break;
}
}
DWORD dwStatus = 0;
MFT_OUTPUT_DATA_BUFFER outputDataBuffer = {};
outputDataBuffer.pSample = pRTSample;
hr = m_pXVP->ProcessOutput(0, 1, &outputDataBuffer, &dwStatus);
if (hr == MF_E_TRANSFORM_NEED_MORE_INPUT)
{
//call process input on the MFT to deliver the YUV video sample
// and the call process output to extract of newly processed frame
hr = m_pXVP->ProcessInput(0, pVideoFrame, 0);
if (FAILED(hr))
{
break;
}
*pbInputFrameUsed = TRUE;
hr = m_pXVP->ProcessOutput(0, 1, &outputDataBuffer, &dwStatus);
if (FAILED(hr))
{
break;
}
}
else
{
*pbInputFrameUsed = FALSE;
}
if (ppVideoOutFrame != NULL)
{
*ppVideoOutFrame = pRTSample;
(*ppVideoOutFrame)->AddRef();
}
} while (FALSE);
SafeRelease(pAttributes);
SafeRelease(pBuffer);
SafeRelease(pRTSample);
SafeRelease(pDXGIBackBuffer);
SafeRelease(pVideoContext);
return hr;
}
А вот определение ProcessFrameUsingD3D11():
HRESULT DX11VideoRenderer::CPresenter::ProcessFrameUsingD3D11( ID3D11Texture2D* pLeftTexture2D, ID3D11Texture2D* pRightTexture2D, UINT dwLeftViewIndex, UINT dwRightViewIndex,
RECT rcDest, UINT32 unInterlaceMode, IMFSample** ppVideoOutFrame )
{
HRESULT hr = S_OK;
ID3D11VideoContext* pVideoContext = NULL;
ID3D11VideoProcessorInputView* pLeftInputView = NULL;
ID3D11VideoProcessorInputView* pRightInputView = NULL;
ID3D11VideoProcessorOutputView* pOutputView = NULL;
ID3D11Texture2D* pDXGIBackBuffer = NULL;
ID3D11RenderTargetView* pRTView = NULL;
IMFSample* pRTSample = NULL;
IMFMediaBuffer* pBuffer = NULL;
D3D11_VIDEO_PROCESSOR_CAPS vpCaps = {0};
LARGE_INTEGER lpcStart,lpcEnd;
do
{
if (!m_pDX11VideoDevice)
{
hr = m_pD3D11Device->QueryInterface(__uuidof(ID3D11VideoDevice), (void**)&m_pDX11VideoDevice);
if (FAILED(hr))
{
break;
}
}
hr = m_pD3DImmediateContext->QueryInterface(__uuidof( ID3D11VideoContext ), (void**)&pVideoContext);
if (FAILED(hr))
{
break;
}
// remember the original rectangles
RECT TRectOld = m_rcDstApp;
RECT SRectOld = m_rcSrcApp;
UpdateRectangles(&TRectOld, &SRectOld);
//Update destination rect with current client rect
m_rcDstApp = rcDest;
D3D11_TEXTURE2D_DESC surfaceDesc;
pLeftTexture2D->GetDesc(&surfaceDesc);
if (!m_pVideoProcessorEnum || !m_pVideoProcessor || m_imageWidthInPixels != surfaceDesc.Width || m_imageHeightInPixels != surfaceDesc.Height)
{
SafeRelease(m_pVideoProcessorEnum);
SafeRelease(m_pVideoProcessor);
m_imageWidthInPixels = surfaceDesc.Width;
m_imageHeightInPixels = surfaceDesc.Height;
D3D11_VIDEO_PROCESSOR_CONTENT_DESC ContentDesc;
ZeroMemory( &ContentDesc, sizeof( ContentDesc ) );
ContentDesc.InputFrameFormat = D3D11_VIDEO_FRAME_FORMAT_INTERLACED_TOP_FIELD_FIRST;
ContentDesc.InputWidth = surfaceDesc.Width;
ContentDesc.InputHeight = surfaceDesc.Height;
ContentDesc.OutputWidth = surfaceDesc.Width;
ContentDesc.OutputHeight = surfaceDesc.Height;
ContentDesc.Usage = D3D11_VIDEO_USAGE_PLAYBACK_NORMAL;
hr = m_pDX11VideoDevice->CreateVideoProcessorEnumerator(&ContentDesc, &m_pVideoProcessorEnum);
if (FAILED(hr))
{
break;
}
UINT uiFlags;
DXGI_FORMAT VP_Output_Format = DXGI_FORMAT_B8G8R8A8_UNORM;
hr = m_pVideoProcessorEnum->CheckVideoProcessorFormat(VP_Output_Format, &uiFlags);
if (FAILED(hr) || 0 == (uiFlags & D3D11_VIDEO_PROCESSOR_FORMAT_SUPPORT_OUTPUT))
{
hr = MF_E_UNSUPPORTED_D3D_TYPE;
break;
}
m_rcSrcApp.left = 0;
m_rcSrcApp.top = 0;
m_rcSrcApp.right = m_uiRealDisplayWidth;
m_rcSrcApp.bottom = m_uiRealDisplayHeight;
DWORD index;
hr = FindBOBProcessorIndex(&index); // GG This may not be needed. BOB is something to do with deinterlacing.
if (FAILED(hr))
{
break;
}
hr = m_pDX11VideoDevice->CreateVideoProcessor(m_pVideoProcessorEnum, index, &m_pVideoProcessor);
if (FAILED(hr))
{
break;
}
if (m_b3DVideo)
{
hr = m_pVideoProcessorEnum->GetVideoProcessorCaps(&vpCaps);
if (FAILED(hr))
{
break;
}
if (vpCaps.FeatureCaps & D3D11_VIDEO_PROCESSOR_FEATURE_CAPS_STEREO)
{
m_bStereoEnabled = TRUE;
}
DXGI_MODE_DESC1 modeFilter = { 0 };
modeFilter.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
modeFilter.Width = surfaceDesc.Width;
modeFilter.Height = surfaceDesc.Height;
modeFilter.Stereo = m_bStereoEnabled;
DXGI_MODE_DESC1 matchedMode;
if (m_bFullScreenState)
{
hr = m_pDXGIOutput1->FindClosestMatchingMode1(&modeFilter, &matchedMode, m_pD3D11Device);
if (FAILED(hr))
{
break;
}
}
}
}
// now create the input and output media types - these need to reflect
// the src and destination rectangles that we have been given.
RECT TRect = m_rcDstApp;
RECT SRect = m_rcSrcApp;
UpdateRectangles(&TRect, &SRect);
const BOOL fDestRectChanged = !EqualRect(&TRect, &TRectOld);
if (!m_pSwapChain1 || fDestRectChanged)
{
hr = UpdateDXGISwapChain();
if (FAILED(hr))
{
break;
}
}
m_bCanProcessNextSample = FALSE;
// Get Backbuffer
hr = m_pSwapChain1->GetBuffer(0, __uuidof(ID3D11Texture2D), (void**)&pDXGIBackBuffer);
if (FAILED(hr))
{
break;
}
// create the output media sample
hr = MFCreateSample(&pRTSample);
if (FAILED(hr))
{
break;
}
hr = MFCreateDXGISurfaceBuffer(__uuidof(ID3D11Texture2D), pDXGIBackBuffer, 0, FALSE, &pBuffer);
if (FAILED(hr))
{
break;
}
hr = pRTSample->AddBuffer(pBuffer);
if (FAILED(hr))
{
break;
}
// GG For 3D - don't need.
if (m_b3DVideo && 0 != m_vp3DOutput)
{
SafeRelease(pBuffer);
hr = MFCreateDXGISurfaceBuffer(__uuidof(ID3D11Texture2D), pDXGIBackBuffer, 1, FALSE, &pBuffer);
if (FAILED(hr))
{
break;
}
hr = pRTSample->AddBuffer(pBuffer);
if (FAILED(hr))
{
break;
}
}
QueryPerformanceCounter(&lpcStart);
QueryPerformanceCounter(&lpcEnd);
//
// Create Output View of Output Surfaces.
//
D3D11_VIDEO_PROCESSOR_OUTPUT_VIEW_DESC OutputViewDesc;
ZeroMemory( &OutputViewDesc, sizeof( OutputViewDesc ) );
if (m_b3DVideo && m_bStereoEnabled)
{
OutputViewDesc.ViewDimension = D3D11_VPOV_DIMENSION_TEXTURE2DARRAY;
}
else
{
OutputViewDesc.ViewDimension = D3D11_VPOV_DIMENSION_TEXTURE2D;
}
OutputViewDesc.Texture2D.MipSlice = 0;
OutputViewDesc.Texture2DArray.MipSlice = 0;
OutputViewDesc.Texture2DArray.FirstArraySlice = 0;
if (m_b3DVideo && 0 != m_vp3DOutput)
{
OutputViewDesc.Texture2DArray.ArraySize = 2; // STEREO
}
QueryPerformanceCounter(&lpcStart);
hr = m_pDX11VideoDevice->CreateVideoProcessorOutputView(pDXGIBackBuffer, m_pVideoProcessorEnum, &OutputViewDesc, &pOutputView);
if (FAILED(hr))
{
break;
}
D3D11_VIDEO_PROCESSOR_INPUT_VIEW_DESC InputLeftViewDesc;
ZeroMemory( &InputLeftViewDesc, sizeof( InputLeftViewDesc ) );
InputLeftViewDesc.FourCC = 0;
InputLeftViewDesc.ViewDimension = D3D11_VPIV_DIMENSION_TEXTURE2D;
InputLeftViewDesc.Texture2D.MipSlice = 0;
InputLeftViewDesc.Texture2D.ArraySlice = dwLeftViewIndex;
hr = m_pDX11VideoDevice->CreateVideoProcessorInputView(pLeftTexture2D, m_pVideoProcessorEnum, &InputLeftViewDesc, &pLeftInputView);
if (FAILED(hr))
{
break;
}
if (m_b3DVideo && MFVideo3DSampleFormat_MultiView == m_vp3DOutput && pRightTexture2D)
{
D3D11_VIDEO_PROCESSOR_INPUT_VIEW_DESC InputRightViewDesc;
ZeroMemory( &InputRightViewDesc, sizeof( InputRightViewDesc ) );
InputRightViewDesc.FourCC = 0;
InputRightViewDesc.ViewDimension = D3D11_VPIV_DIMENSION_TEXTURE2D;
InputRightViewDesc.Texture2D.MipSlice = 0;
InputRightViewDesc.Texture2D.ArraySlice = dwRightViewIndex;
hr = m_pDX11VideoDevice->CreateVideoProcessorInputView(pRightTexture2D, m_pVideoProcessorEnum, &InputRightViewDesc, &pRightInputView);
if (FAILED(hr))
{
break;
}
}
QueryPerformanceCounter(&lpcEnd);
QueryPerformanceCounter(&lpcStart);
SetVideoContextParameters(pVideoContext, &SRect, &TRect, unInterlaceMode);
// Enable/Disable Stereo
if (m_b3DVideo)
{
pVideoContext->VideoProcessorSetOutputStereoMode(m_pVideoProcessor, m_bStereoEnabled);
D3D11_VIDEO_PROCESSOR_STEREO_FORMAT vpStereoFormat = D3D11_VIDEO_PROCESSOR_STEREO_FORMAT_SEPARATE;
if (MFVideo3DSampleFormat_Packed_LeftRight == m_vp3DOutput)
{
vpStereoFormat = D3D11_VIDEO_PROCESSOR_STEREO_FORMAT_HORIZONTAL;
}
else if (MFVideo3DSampleFormat_Packed_TopBottom == m_vp3DOutput)
{
vpStereoFormat = D3D11_VIDEO_PROCESSOR_STEREO_FORMAT_VERTICAL;
}
pVideoContext->VideoProcessorSetStreamStereoFormat(m_pVideoProcessor,
0, m_bStereoEnabled, vpStereoFormat, TRUE, TRUE, D3D11_VIDEO_PROCESSOR_STEREO_FLIP_NONE, 0);
}
QueryPerformanceCounter(&lpcEnd);
QueryPerformanceCounter(&lpcStart);
D3D11_VIDEO_PROCESSOR_STREAM StreamData;
ZeroMemory( &StreamData, sizeof( StreamData ) );
StreamData.Enable = TRUE;
StreamData.OutputIndex = 0;
StreamData.InputFrameOrField = 0;
StreamData.PastFrames = 0;
StreamData.FutureFrames = 0;
StreamData.ppPastSurfaces = NULL;
StreamData.ppFutureSurfaces = NULL;
StreamData.pInputSurface = pLeftInputView;
StreamData.ppPastSurfacesRight = NULL;
StreamData.ppFutureSurfacesRight = NULL;
if (m_b3DVideo && MFVideo3DSampleFormat_MultiView == m_vp3DOutput && pRightTexture2D)
{
StreamData.pInputSurfaceRight = pRightInputView;
}
hr = pVideoContext->VideoProcessorBlt(m_pVideoProcessor, pOutputView, 0, 1, &StreamData );
if (FAILED(hr))
{
break;
}
QueryPerformanceCounter(&lpcEnd);
if (ppVideoOutFrame != NULL)
{
*ppVideoOutFrame = pRTSample;
(*ppVideoOutFrame)->AddRef();
}
}
while (FALSE);
SafeRelease(pBuffer);
SafeRelease(pRTSample);
SafeRelease(pDXGIBackBuffer);
SafeRelease(pOutputView);
SafeRelease(pLeftInputView);
SafeRelease(pRightInputView);
SafeRelease(pVideoContext);
return hr;
}
Последнее замечание, документация гласит:
В частности, этот пример показывает, как:
- Декодирование видео с использованием API Media Foundation
- Визуализация декодированного видео с использованием API-интерфейсов DirectX 11
- Вывод видеопотока на мониторы с несколькими мониторами
Я не могу найти ничего, что делает расшифровку, если только по какой-то магической фразе MF, с которой я еще не наткнулся. Но это не showtopper, потому что я могу вставить MFT декодер H.264 вперед без проблем. Я просто хотел бы уточнить документацию.
Любая помощь будет принята с благодарностью. Спасибо!