qt-everywhere-src-5.15.1/qtmultimedia/src/plugins/wmf/decoder/mfdecodersourcereader.h

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#ifndef MFDECODERSOURCEREADER_H
#define MFDECODERSOURCEREADER_H
#include <mfapi.h>
#include <mfidl.h>
#include <Mfreadwrite.h>

#include <QtCore/qobject.h>
#include <QtCore/qmutex.h>
#include "qaudioformat.h"

QT_USE_NAMESPACE

class MFDecoderSourceReader : public QObject, public IMFSourceReaderCallback
{
    Q_OBJECT
public:
    MFDecoderSourceReader(QObject *parent = 0);
    void shutdown();

    IMFMediaSource* mediaSource();
    IMFMediaType* setSource(IMFMediaSource *source, const QAudioFormat &audioFormat);

    void reset();
    void readNextSample();
    QList<IMFSample*> takeSamples(); //internal samples will be cleared after this

    //from IUnknown
    STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppvObject);
    STDMETHODIMP_(ULONG) AddRef(void);
    STDMETHODIMP_(ULONG) Release(void);

    //from IMFSourceReaderCallback
    STDMETHODIMP OnReadSample(HRESULT hrStatus, DWORD dwStreamIndex,
        DWORD dwStreamFlags, LONGLONG llTimestamp, IMFSample *pSample);
    STDMETHODIMP OnFlush(DWORD dwStreamIndex);
    STDMETHODIMP OnEvent(DWORD dwStreamIndex, IMFMediaEvent *pEvent);

Q_SIGNALS:
    void sampleAdded();
    void finished();

private:
    long m_cRef;
    QList<IMFSample*>   m_cachedSamples;
    QMutex              m_samplesMutex;

    IMFSourceReader             *m_sourceReader;
    IMFMediaSource              *m_source;
};
#endif//MFDECODERSOURCEREADER_H