qt-everywhere-src-5.15.1/qtmultimedia/src/plugins/wmf/player/samplegrabber.h

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#ifndef SAMPLEGRABBER_H
#define SAMPLEGRABBER_H

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

class MFAudioProbeControl;

class SampleGrabberCallback : public IMFSampleGrabberSinkCallback
{
public:
    // IUnknown methods
    STDMETHODIMP QueryInterface(REFIID iid, void** ppv);
    STDMETHODIMP_(ULONG) AddRef();
    STDMETHODIMP_(ULONG) Release();

    // IMFClockStateSink methods
    STDMETHODIMP OnClockStart(MFTIME hnsSystemTime, LONGLONG llClockStartOffset);
    STDMETHODIMP OnClockStop(MFTIME hnsSystemTime);
    STDMETHODIMP OnClockPause(MFTIME hnsSystemTime);
    STDMETHODIMP OnClockRestart(MFTIME hnsSystemTime);
    STDMETHODIMP OnClockSetRate(MFTIME hnsSystemTime, float flRate);

    // IMFSampleGrabberSinkCallback methods
    STDMETHODIMP OnSetPresentationClock(IMFPresentationClock* pClock);
    STDMETHODIMP OnShutdown();

protected:
    SampleGrabberCallback() : m_cRef(1) {}

public:
    virtual ~SampleGrabberCallback() {}

private:
    long m_cRef;
};

class AudioSampleGrabberCallback: public SampleGrabberCallback {
public:
    void addProbe(MFAudioProbeControl* probe);
    void removeProbe(MFAudioProbeControl* probe);
    void setFormat(const QAudioFormat& format);

    STDMETHODIMP OnProcessSample(REFGUID guidMajorMediaType, DWORD dwSampleFlags,
        LONGLONG llSampleTime, LONGLONG llSampleDuration, const BYTE * pSampleBuffer,
        DWORD dwSampleSize);

private:
    QList<MFAudioProbeControl*> m_audioProbes;
    QMutex m_audioProbeMutex;
    QAudioFormat m_format;
};

#endif // SAMPLEGRABBER_H