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设置用于颜色空间转换的IMTransform视频处理器



我正在尝试使用视频处理器MFT进行一些基本的颜色空间转换。我的相机本机支持NV12，我需要RGB24来编码一些着色器，它将提供类似卡通的效果。

以下是用于执行MF的介质类的定义

class Media : public IMFSourceReaderCallback //this class inhertis from IMFSourceReaderCallback
{
CRITICAL_SECTION criticalSection;
long referenceCount;
WCHAR                   *wSymbolicLink;
UINT32                  cchSymbolicLink;
IMFSourceReader* sourceReader;
MFT_REGISTER_TYPE_INFO *inputVideoTypes;
MFT_REGISTER_TYPE_INFO *outputVideoTypes;
IMFMediaType* mediaType = NULL;
IMFMediaType* streamType = NULL;
IMFMediaType* streamType2 = NULL;
IMFMediaType* streamType3 = NULL;
IMFTransform **VP;
public:
LONG stride;
float bytesPerPixel;
GUID videoFormat;
UINT height;
UINT width;
WCHAR deviceNameString[2048];
BYTE* rawData;
UINT32 count;
DWORD devices_found = 0;
HRESULT CreateCaptureDevice();
HRESULT SetSourceReader(IMFActivate *device);
HRESULT IsMediaTypeSupported(IMFMediaType* type);
HRESULT GetDefaultStride(IMFMediaType *pType, LONG *plStride);
HRESULT Close();
Media();
~Media();   
// the class must implement the methods from IUnknown 
STDMETHODIMP QueryInterface(REFIID iid, void** ppv);
STDMETHODIMP_(ULONG) AddRef();
STDMETHODIMP_(ULONG) Release();
//  the class must implement the methods from IMFSourceReaderCallback 
STDMETHODIMP OnReadSample(HRESULT status, DWORD streamIndex, DWORD streamFlags, LONGLONG timeStamp, IMFSample *sample);
STDMETHODIMP OnEvent(DWORD, IMFMediaEvent *);
STDMETHODIMP OnFlush(DWORD);
};

我正在以以下方式设置IMFTransform：

inputVideoTypes = new MFT_REGISTER_TYPE_INFO;
inputVideoTypes->guidMajorType = MFMediaType_Video;
inputVideoTypes->guidSubtype = MFVideoFormat_NV12;
outputVideoTypes = new MFT_REGISTER_TYPE_INFO;
outputVideoTypes->guidMajorType = MFMediaType_Video;
outputVideoTypes->guidSubtype = MFVideoFormat_RGB24;
hr = sourceReader->GetNativeMediaType(MF_SOURCE_READER_FIRST_VIDEO_STREAM, i, &streamType2);
IMFActivate **transformActivateArray = NULL;
UINT32 MFTcount;
hr = MFTEnumEx(MFT_CATEGORY_VIDEO_PROCESSOR, MFT_ENUM_FLAG_ALL, inputVideoTypes, outputVideoTypes, &transformActivateArray, &MFTcount);
if (FAILED(hr))
{
exit(3);
}
if (MFTcount == 0)
exit(7);
VP = new IMFTransform*[MFTcount];
for (DWORD i = 0; i < MFTcount; i++)
{
hr = transformActivateArray[i]->ActivateObject(__uuidof(IMFTransform), (void**)&VP[i]);
}
DWORD* inputCount = new DWORD[MFTcount];
DWORD* outputCount = new DWORD[MFTcount];
for (DWORD i = 0; i < MFTcount; i++)
{
hr = VP[i]->GetStreamCount(&inputCount[i], &outputCount[i]);
}
DWORD **inputids = new DWORD*[MFTcount];
DWORD **outputids = new DWORD*[MFTcount];
for (DWORD i = 0; i < MFTcount; i++)
{
inputids[i] = new DWORD[inputCount[i]];
outputids[i] = new DWORD[outputCount[i]];
}
for (DWORD i = 0; i < MFTcount; i++)
{
VP[i]->GetStreamIDs(inputCount[i], inputids[i], outputCount[i], outputids[i]);
if (FAILED(hr))
exit(5);
}
DWORD flag1 = -1;
DWORD flag2 = -1;
for (DWORD i = 0; i < MFTcount; i++)
{
for (DWORD j = 0; j < inputCount[i]; j++)
{
hr = VP[i]->GetInputAvailableType(0, 0, &streamType);
if (SUCCEEDED(hr))
{
flag1 = i;
flag2 = j;
break;
}
}
}
if (flag1 == -1 && flag2 == -1)
exit(2);
hr = VP[0]->SetInputType(0, streamType2, 0);
hr = VP[0]->GetOutputAvailableType(0, 0, &streamType3);
hr = VP[0]->SetOutputType(0, streamType3, 0);

问题是SetOutput方法返回：找不到所需的属性，我真的不知道怎么了。有人能指出我做坏事的地方吗？谢谢

编辑：LogMedia输入类型：

MF_MT_FRAME_SIZE    1280 x 720
MF_MT_YUV_MATRIX    2
MF_MT_MAJOR_TYPE    MFMediaType_Video
MF_MT_VIDEO_LIGHTING    3
MF_MT_VIDEO_CHROMA_SITING   1
MF_MT_AM_FORMAT_TYPE    {F72A76A0-EB0A-11D0-ACE4-0000C0CC16BA}
MF_MT_FIXED_SIZE_SAMPLES    1
MF_MT_VIDEO_NOMINAL_RANGE   1
MF_MT_FRAME_RATE    30 x 1
MF_MT_PIXEL_ASPECT_RATIO    1 x 1
MF_MT_ALL_SAMPLES_INDEPENDENT   1
MF_MT_FRAME_RATE_RANGE_MIN  128849018881
MF_MT_VIDEO_PRIMARIES   2
MF_MT_INTERLACE_MODE    2
MF_MT_FRAME_RATE_RANGE_MAX  128849018881
{EA031A62-8BBB-43C5-B5C4-572D2D231C18}  1
MF_MT_SUBTYPE   MFVideoFormat_NV12

输出日志不起作用

Exception thrown: read access violation.
**pType** was nullptr.

EDIT2

我只有一个通过EnumEx方法枚举的VP，它有固定数量的输入(1(和输出(1(流，所以以前的日志是输入的唯一日志

编辑3

hr = VP->SetInputType(0, streamType2, 0);
//MediaFoundationSamples::LogMediaType(streamType2);
DWORD dwIndex = 4;
hr = VP->GetOutputAvailableType(0, dwIndex, &streamType3);
hr = MFSetAttributeSize(streamType3, MF_MT_FRAME_SIZE, 1280, 720);
hr = streamType3->SetUINT32(MF_MT_FIXED_SIZE_SAMPLES, 1);
hr = MFSetAttributeRatio(streamType3, MF_MT_FRAME_RATE, 30, 1);
hr = MFSetAttributeRatio(streamType3, MF_MT_PIXEL_ASPECT_RATIO, 1, 1);
streamType3->SetUINT32(MF_MT_ALL_SAMPLES_INDEPENDENT, 1);
streamType3->SetUINT32(MF_MT_INTERLACE_MODE, 2);
MediaFoundationSamples::LogMediaType(streamType3);
hr = VP->SetOutputType(0, streamType3, 0);
hr = VP->GetInputStreamInfo(0, &InputInfo);
hr = VP->GetOutputStreamInfo(0, &OutputInfo);

onReadSample方法中的处理看起来像：

hr = VP->ProcessMessage(MFT_MESSAGE_NOTIFY_BEGIN_STREAMING, NULL);
hr = VP->ProcessInput(0, sample, 0);
DWORD statusFlags;
hr = VP->GetOutputStatus(&statusFlags);
while (statusFlags == 0)
{
hr = VP->ProcessInput(0, sample, 0);
hr = VP->GetOutputStatus(&statusFlags);
}
DWORD outputStatus = 0;
IMFSample* outputSample;
MFCreateSample(&outputSample);
MFT_OUTPUT_DATA_BUFFER outputBuffer = {};
outputBuffer.pSample = outputSample;
hr = VP->ProcessOutput(0, OutputInfo.cbSize, &outputBuffer, &outputStatus);

从Mediafoundation示例中，您有LogMediaType函数LogMediaType

你能显示streamType2/streamType3的日志吗。

同时从这里检查现有的视频媒体类型视频格式属性

它可以帮助您找到丢失的属性。

EDIT1

因为我使用的是Windows Seven，所以我没有视频处理器MFT。我用的是色彩转换器DSP，谁也可以做色彩空间转换色彩转换器DSP

IMFTransform* pVideoColorConverter = NULL;
IMFMediaType* pVideoOutputType = NULL;
// RGB24 media type at index 10, but can be different on your system
DWORD dwRGB24Index = 10;
hr = CoCreateInstance(CLSID_CColorConvertDMO, NULL, CLSCTX_INPROC_SERVER, IID_IMFTransform, reinterpret_cast<void**>(&pVideoColorConverter);
hr = pVideoColorConverter->SetInputType(0, pVideoInputType, 0);
hr = pVideoColorConverter->GetOutputAvailableType(0, dwRGB24Index, &pVideoOutputType);
hr = pVideoColorConverter->SetOutputType(0, pVideoOutputType, 0);
LogMediaType(pVideoInputType);
LogMediaType(pVideoOutputType);

这是日志：

pVideoInputType (my camera provide YUY2 not NV12) :
MF_MT_MAJOR_TYPE                MFMediaType_Video
MF_MT_SUBTYPE                   MFVideoFormat_YUY2
MF_MT_FRAME_SIZE                640 x 480
MF_MT_DEFAULT_STRIDE            1280
MF_MT_ALL_SAMPLES_INDEPENDENT   1
MF_MT_FIXED_SIZE_SAMPLES        1
MF_MT_SAMPLE_SIZE               614400
MF_MT_AVG_BITRATE               147456000
MF_MT_FRAME_RATE                30 x 1
MF_MT_PIXEL_ASPECT_RATIO        1 x 1
MF_MT_INTERLACE_MODE            2
MF_MT_AM_FORMAT_TYPE            {05589F80-C356-11CE-BF01-00AA0055595A}
MF_MT_FRAME_RATE_RANGE_MAX      128849018881
MF_MT_FRAME_RATE_RANGE_MIN      42949672961333333

pVideoOutputType :
MF_MT_MAJOR_TYPE                MFMediaType_Video
MF_MT_SUBTYPE                   MFVideoFormat_RGB24
MF_MT_FRAME_SIZE                640 x 480
MF_MT_FRAME_RATE                10000000 x 333333
MF_MT_GEOMETRIC_APERTURE        <<byte array>>
MF_MT_PIXEL_ASPECT_RATIO        1 x 1
MF_MT_INTERLACE_MODE            2
MF_MT_DEFAULT_STRIDE            1920
MF_MT_ALL_SAMPLES_INDEPENDENT   1
MF_MT_FIXED_SIZE_SAMPLES        1
MF_MT_SAMPLE_SIZE               921600

EDIT2

好的，你的视频输入类型似乎是正确的。

您现在可以记录所有VP:的所有输入类型(streamType(吗

DWORD* inputCount = new DWORD[MFTcount];
DWORD* outputCount = new DWORD[MFTcount];
for(DWORD i = 0; i < MFTcount; i++){
hr = VP[i]->GetStreamCount(&inputCount[i], &outputCount[i]);
if(FAILED(hr)){
exit(3);
}
}
DWORD** inputids = new DWORD*[MFTcount];
DWORD** outputids = new DWORD*[MFTcount];
for(DWORD i = 0; i < MFTcount; i++){
inputids[i] = new DWORD[inputCount[i]];
outputids[i] = new DWORD[outputCount[i]];
}
for(DWORD i = 0; i < MFTcount; i++){
hr = VP[i]->GetStreamIDs(inputCount[i], inputids[i], outputCount[i], outputids[i]);
// By convention, if an MFT has exactly one fixed input stream and one fixed output stream, it should assign the identifier 0 to both streams
if(hr == E_NOTIMPL && inputCount[i] == 1 && outputCount[i] == 1){
inputids[i][0] = 0;
outputids[i][0] = 0;
}
else if(FAILED(hr)){
exit(4);
}
}
for(DWORD i = 0; i < MFTcount; i++){
// todo : log VP = i
for(DWORD j = 0; j < inputCount[i]; j++){
// todo : log stream id = inputids[i][j]
DWORD dwTypeIndex = 0;
hr = S_OK;
while(hr == S_OK){
// todo :log dwTypeIndex
hr = VP[i]->GetInputAvailableType(inputids[i][j], dwTypeIndex, &streamType);
if(SUCCEEDED(hr)){
LogMediaType(streamType);
SAFE_RELEASE(streamType);
dwTypeIndex++;
}
else{
// todo : check hr, should be MF_E_NO_MORE_TYPES
// if hr == E_NOTIMPL/MF_E_INVALIDSTREAMNUMBER... should be error
}
}
}
}

EDIT3

以下是视频处理器MFT的用法：视频处理器MTF样本

似乎您需要在使用D3DManager之前提供它(HRESULT DX11VideoRenderer:：CPresenter:：CreateXVP(void(->line 1118(

我不确定D3DManager，因为我无法在我的系统上测试它。

hr = CoCreateInstance(CLSID_VideoProcessorMFT, nullptr, CLSCTX_INPROC_SERVER, IID_IMFTransform, (void**)&m_pXVP);
if (FAILED(hr))
{
break;
}
hr = m_pXVP->ProcessMessage(MFT_MESSAGE_SET_D3D_MANAGER, ULONG_PTR(m_pDXGIManager));
if (FAILED(hr))
{
break;
}
// Tell the XVP that we are the swapchain allocator
hr = m_pXVP->GetAttributes(&pAttributes);
if (FAILED(hr))
{
break;
}
hr = pAttributes->SetUINT32(MF_XVP_PLAYBACK_MODE, TRUE);
if (FAILED(hr))
{
break;
}

检查代码中的所有m_pXVP和m_pXVPControl。

EDIT4

根据您的inputType，尝试手动创建outputType，添加以下属性：

MF_MT_MAJOR_TYPE                MFMediaType_Video
MF_MT_SUBTYPE                   MFVideoFormat_RGB24
MF_MT_FRAME_SIZE                1280 x 720
MF_MT_FIXED_SIZE_SAMPLES        1
MF_MT_FRAME_RATE                30 x 1
MF_MT_PIXEL_ASPECT_RATIO        1 x 1
MF_MT_ALL_SAMPLES_INDEPENDENT   1
MF_MT_INTERLACE_MODE            2

因此，在SetInputType之后，创建视频媒体输出类型，然后用这个新的mediaType调用SetOutputType。

您可以先尝试仅使用MF_MT_MAJOR_TYPE/MF_MT_SUBTYPE/MF-MT_FRAME_SIZE，然后逐个添加其他选项。

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