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** $QT_BEGIN_LICENSE:LGPL21$
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** accordance with the commercial license agreement provided with the
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****************************************************************************/

#ifndef MFTRANSFORM_H
#define MFTRANSFORM_H

#include <mfapi.h>
#include <mfidl.h>
#include <QtCore/qlist.h>
#include <QtCore/qmutex.h>
#include <QtMultimedia/qvideosurfaceformat.h>

QT_USE_NAMESPACE

class MFVideoProbeControl;

class MFTransform: public IMFTransform
{
public:
    MFTransform();
    ~MFTransform();

    void addProbe(MFVideoProbeControl* probe);
    void removeProbe(MFVideoProbeControl* probe);

    void addSupportedMediaType(IMFMediaType *type);

    // IUnknown methods
    STDMETHODIMP QueryInterface(REFIID iid, void** ppv);
    STDMETHODIMP_(ULONG) AddRef();
    STDMETHODIMP_(ULONG) Release();

    // IMFTransform methods
    STDMETHODIMP GetStreamLimits(DWORD *pdwInputMinimum, DWORD *pdwInputMaximum, DWORD *pdwOutputMinimum, DWORD *pdwOutputMaximum);
    STDMETHODIMP GetStreamCount(DWORD *pcInputStreams, DWORD *pcOutputStreams);
    STDMETHODIMP GetStreamIDs(DWORD dwInputIDArraySize, DWORD *pdwInputIDs, DWORD dwOutputIDArraySize, DWORD *pdwOutputIDs);
    STDMETHODIMP GetInputStreamInfo(DWORD dwInputStreamID, MFT_INPUT_STREAM_INFO *pStreamInfo);
    STDMETHODIMP GetOutputStreamInfo(DWORD dwOutputStreamID, MFT_OUTPUT_STREAM_INFO *pStreamInfo);
    STDMETHODIMP GetAttributes(IMFAttributes **pAttributes);
    STDMETHODIMP GetInputStreamAttributes(DWORD dwInputStreamID, IMFAttributes **pAttributes);
    STDMETHODIMP GetOutputStreamAttributes(DWORD dwOutputStreamID, IMFAttributes **pAttributes);
    STDMETHODIMP DeleteInputStream(DWORD dwStreamID);
    STDMETHODIMP AddInputStreams(DWORD cStreams, DWORD *adwStreamIDs);
    STDMETHODIMP GetInputAvailableType(DWORD dwInputStreamID, DWORD dwTypeIndex, IMFMediaType **ppType);
    STDMETHODIMP GetOutputAvailableType(DWORD dwOutputStreamID,DWORD dwTypeIndex, IMFMediaType **ppType);
    STDMETHODIMP SetInputType(DWORD dwInputStreamID, IMFMediaType *pType, DWORD dwFlags);
    STDMETHODIMP SetOutputType(DWORD dwOutputStreamID, IMFMediaType *pType, DWORD dwFlags);
    STDMETHODIMP GetInputCurrentType(DWORD dwInputStreamID, IMFMediaType **ppType);
    STDMETHODIMP GetOutputCurrentType(DWORD dwOutputStreamID, IMFMediaType **ppType);
    STDMETHODIMP GetInputStatus(DWORD dwInputStreamID, DWORD *pdwFlags);
    STDMETHODIMP GetOutputStatus(DWORD *pdwFlags);
    STDMETHODIMP SetOutputBounds(LONGLONG hnsLowerBound, LONGLONG hnsUpperBound);
    STDMETHODIMP ProcessEvent(DWORD dwInputStreamID, IMFMediaEvent *pEvent);
    STDMETHODIMP ProcessMessage(MFT_MESSAGE_TYPE eMessage, ULONG_PTR ulParam);
    STDMETHODIMP ProcessInput(DWORD dwInputStreamID, IMFSample *pSample, DWORD dwFlags);
    STDMETHODIMP ProcessOutput(DWORD dwFlags, DWORD cOutputBufferCount, MFT_OUTPUT_DATA_BUFFER *pOutputSamples, DWORD *pdwStatus);

private:
    HRESULT OnFlush();
    static QVideoFrame::PixelFormat formatFromSubtype(const GUID& subtype);
    static QVideoSurfaceFormat videoFormatForMFMediaType(IMFMediaType *mediaType, int *bytesPerLine);
    QVideoFrame makeVideoFrame();
    QByteArray dataFromBuffer(IMFMediaBuffer *buffer, int height, int *bytesPerLine);
    bool isMediaTypeSupported(IMFMediaType *type);

    long m_cRef;
    IMFMediaType *m_inputType;
    IMFMediaType *m_outputType;
    IMFSample *m_sample;
    QMutex m_mutex;

    QList<IMFMediaType*> m_mediaTypes;

    QList<MFVideoProbeControl*> m_videoProbes;
    QMutex m_videoProbeMutex;

    QVideoSurfaceFormat m_format;
    int m_bytesPerLine;
};

#endif