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#ifndef DIRECTSHOWSAMPLESCHEDULER_H

#define DIRECTSHOWSAMPLESCHEDULER_H

#include <QtCore/qmutex.h>

#include <QtCore/qobject.h>

#include <QtCore/qsemaphore.h>

#include <dshow.h>

class DirectShowTimedSample;

class DirectShowSampleScheduler : public QObject, public IMemInputPin

{

    Q_OBJECT

public:

    enum State

    {

        Stopped  = 0x00,

        Running  = 0x01,

        Paused   = 0x02,

        RunMask  = 0x03,

        Flushing = 0x04

    };

    DirectShowSampleScheduler(IUnknown *pin, QObject *parent = 0);

    ~DirectShowSampleScheduler();

    // IUnknown

    HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void **ppvObject);

    ULONG STDMETHODCALLTYPE AddRef();

    ULONG STDMETHODCALLTYPE Release();

    // IMemInputPin

    HRESULT STDMETHODCALLTYPE GetAllocator(IMemAllocator **ppAllocator);

    HRESULT STDMETHODCALLTYPE NotifyAllocator(IMemAllocator *pAllocator, BOOL bReadOnly);

    HRESULT STDMETHODCALLTYPE GetAllocatorRequirements(ALLOCATOR_PROPERTIES *pProps);

    HRESULT STDMETHODCALLTYPE Receive(IMediaSample *pSample);

    HRESULT STDMETHODCALLTYPE ReceiveMultiple(IMediaSample **pSamples, long nSamples, long *nSamplesProcessed);

    HRESULT STDMETHODCALLTYPE ReceiveCanBlock();

    void run(REFERENCE_TIME startTime);

    void pause();

    void stop();

    void setFlushing(bool flushing);

    IReferenceClock *clock() const { return m_clock; }

    void setClock(IReferenceClock *clock);

    bool schedule(IMediaSample *sample);

    bool scheduleEndOfStream();

    IMediaSample *takeSample(bool *eos);

    bool event(QEvent *event);

Q_SIGNALS:

    void sampleReady();

private:

    IUnknown *m_pin;

    IReferenceClock *m_clock;

    IMemAllocator *m_allocator;

    DirectShowTimedSample *m_head;

    DirectShowTimedSample *m_tail;

    int m_maximumSamples;

    int m_state;

    REFERENCE_TIME m_startTime;

    HANDLE m_timeoutEvent;

    HANDLE m_flushEvent;

    QSemaphore m_semaphore;

    QMutex m_mutex;

};

#endif