rarender.h

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

    //
    STDMETHOD (StartStream)	(THIS_
				IHXStream*	    pStream,
				IHXPlayer*	    pPlayer);

    /////////////////////////////////////////////////////////////////////////
    //	Method:
    //	    IHXRenderer::EndStream
    //	Purpose:
    //	    Called by client engine to inform the renderer that the stream
    //	    is was rendering is closed.
    //
    STDMETHOD (EndStream)	(THIS);

    /////////////////////////////////////////////////////////////////////////
    //	Method:
    //		IHXRenderer::OnHeader
    //	Purpose:
    //		Called by client engine when a header for this renderer is
    //		available. The header will arrive before any packets.
    //
    STDMETHOD (OnHeader)	(THIS_
				IHXValues*	    pHeader);

    /////////////////////////////////////////////////////////////////////////
    //	Method:
    //	    IHXRenderer::OnPacket
    //	Purpose:
    //	    Called by client engine when a packet for this renderer is
    //	    due.
    //
    STDMETHOD (OnPacket)	(THIS_
				IHXPacket*	    pPacket,
				LONG32 		    lTimeOffset);

    /////////////////////////////////////////////////////////////////////////
    //	Method:
    //	    IHXRenderer::OnTimeSync
    //	Purpose:
    //	    Called by client engine to inform the renderer of the current
    //	    time relative to the streams synchronized time-line. The
    //	    renderer should use this time value to update its display or
    //	    render it's stream data accordingly.
    //
    STDMETHOD (OnTimeSync)	(THIS_
				ULONG32		    ulTime);

    /////////////////////////////////////////////////////////////////////////
    //  Method:
    //	    IHXRenderer::OnPreSeek
    //  Purpose:
    //	    Called by client engine to inform the renderer that a seek is
    //	    about to occur. The render is informed the last time for the
    //	    stream's time line before the seek, as well as the first new
    //	    time for the stream's time line after the seek will be completed.
    //
    STDMETHOD (OnPreSeek)	(THIS_
				ULONG32		    ulOldTime,
				ULONG32		    ulNewTime);

    /////////////////////////////////////////////////////////////////////////
    //	Method:
    //	    IHXRenderer::OnPostSeek
    //	Purpose:
    //	    Called by client engine to inform the renderer that a seek has
    //	    just occured. The render is informed the last time for the
    //	    stream's time line before the seek, as well as the first new
    //	    time for the stream's time line after the seek.
    //
    STDMETHOD (OnPostSeek)	(THIS_
				ULONG32		    ulOldTime,
				ULONG32		    ulNewTime);

    /////////////////////////////////////////////////////////////////////////
    //	Method:
    //	    IHXRenderer::OnPause
    //	Purpose:
    //	    Called by client engine to inform the renderer that a pause has
    //	    just occured. The render is informed the last time for the
    //	    stream's time line before the pause.
    //
    STDMETHOD (OnPause)		(THIS_
				ULONG32		    ulTime);

    /////////////////////////////////////////////////////////////////////////
    //	Method:
    //		IHXRenderer::OnBegin
    //	Purpose:
    //		Called by client engine to inform the renderer that a begin or
    //		resume has just occured. The render is informed the first time
    //		for the stream's time line after the resume.
    //
    STDMETHOD (OnBegin)		(THIS_
				ULONG32		    ulTime);

    /////////////////////////////////////////////////////////////////////////
    //	Method:
    //		IHXRenderer::OnBuffering
    //	Purpose:
    //		Called by client engine to inform the renderer that buffering
    //		of data is occuring. The render is informed of the reason for
    //		the buffering (start-up of stream, seek has occured, network
    //		congestion, etc.), as well as percentage complete of the
    //		buffering process.
    //
    STDMETHOD (OnBuffering)	(THIS_
				ULONG32		    ulFlags,
				UINT16		    unPercentComplete);

    /////////////////////////////////////////////////////////////////////////
    //	Method:
    //		IHXRenderer::GetDisplayType
    //	Purpose:
    //		Called by client engine to ask the renderer for it's preferred
    //		display type. When layout information is not present, the
    //		renderer will be asked for it's prefered display type. Depending
    //		on the display type a buffer of additional information may be
    //		needed. This buffer could contain information about preferred
    //		window size.
    //
    STDMETHOD (GetDisplayType)	(THIS_
				REF(HX_DISPLAY_TYPE)	ulFlags,
				REF(IHXBuffer*)	pBuffer);

    /************************************************************************
     *	Method:
     *	    IHXRenderer::OnEndofPackets
     *	Purpose:
     *	    Called by client engine to inform the renderer that all the
     *	    packets have been delivered. However, if the user seeks before
     *	    EndStream() is called, renderer may start getting packets again
     *	    and the client engine will eventually call this function again.
     */
    STDMETHOD(OnEndofPackets)	(THIS);

    /*
     *  IHXDryNotification methods
     */

    /************************************************************************
     *  Method:
     *      IHXDryNotificationOnDryNotification
     *  Purpose:
     *	    This function is called when it is time to write to audio device
     *	    and there is not enough data in the audio stream. The renderer can
     *	    then decide to add more data to the audio stream. This should be
     *	    done synchronously within the call to this function.
     *	    It is OK to not write any data. Silence will be played instead.
     */
    STDMETHOD(OnDryNotification) (THIS_
				UINT32 /*IN*/ ulCurrentStreamTime,
				UINT32 /*IN*/ ulMinimumDurationRequired);


    /*
     *	IHXStatistics methods
     */

    /************************************************************************
     *  Method:
     *      IHXStatistics::InitializeStatistics
     *  Purpose:
     *      Pass registry ID to the caller
     */
    STDMETHOD (InitializeStatistics)
				(THIS_
				UINT32		    /*IN*/ ulRegistryID);

    /************************************************************************
     *  Method:
     *      IHXStatistics::UpdateStatistics
     *  Purpose:
     *      Notify the client to update its statistics stored in the registry
     */
    STDMETHOD (UpdateStatistics)(THIS);

    STDMETHOD (GetBandwidthInfo) (THIS_ IHXValues* pValues);


    /*
     *	IHXInterruptSafe methods
     */

    /************************************************************************
     *	Method:
     *	    IHXInterruptSafe::IsInterruptSafe
     *	Purpose:
     *	    This is the function that will be called to determine if
     *	    interrupt time execution is supported.
     */
    STDMETHOD_(BOOL,IsInterruptSafe)	(THIS)
    					{ return TRUE; };

    /************************************************************************
     *	Method:
     *	    IHXUpdateProperties::UpdatePacketTimeOffset
     *	Purpose:
     *	    Call this method to update the timestamp offset of cached packets
     */
    STDMETHOD(UpdatePacketTimeOffset) (THIS_
                                       INT32 lTimeOffset);

    /************************************************************************
     *	Method:
     *	    IHXUpdateProperties::UpdatePlayTimes
     *	Purpose:
     *	    Call this method to update the playtime attributes
     */
    STDMETHOD(UpdatePlayTimes)	      (THIS_
				       IHXValues* pProps);

    // IHXValues methods
    STDMETHOD(SetPropertyULONG32)      (THIS_ const char* pName, ULONG32 ulVal);
    STDMETHOD(GetPropertyULONG32)      (THIS_ const char* pName, REF(ULONG32) rulVal);
    STDMETHOD(GetFirstPropertyULONG32) (THIS_ REF(const char*) rpName, REF(ULONG32) rulVal);
    STDMETHOD(GetNextPropertyULONG32)  (THIS_ REF(const char*) rpName, REF(ULONG32) rulVal);
    STDMETHOD(SetPropertyBuffer)       (THIS_ const char* pName, IHXBuffer* pVal);
    STDMETHOD(GetPropertyBuffer)       (THIS_ const char* pName, REF(IHXBuffer*) rpVal);
    STDMETHOD(GetFirstPropertyBuffer)  (THIS_ REF(const char*) rpName, REF(IHXBuffer*) rpVal);
    STDMETHOD(GetNextPropertyBuffer)   (THIS_ REF(const char*) rpName, REF(IHXBuffer*) rpVal);
    STDMETHOD(SetPropertyCString)      (THIS_ const char* pName, IHXBuffer* pVal);
    STDMETHOD(GetPropertyCString)      (THIS_ const char* pName, REF(IHXBuffer*) rpVal);
    STDMETHOD(GetFirstPropertyCString) (THIS_ REF(const char*) rpName, REF(IHXBuffer*) rpVal);
    STDMETHOD(GetNextPropertyCString)  (THIS_ REF(const char*) rpName, REF(IHXBuffer*) rpVal);

    static HX_RESULT STDAPICALLTYPE HXCreateInstance(IUnknown** ppIUnknown);
    static HX_RESULT STDAPICALLTYPE CanUnload2(void);
};

#ifdef _MACINTOSH
class CDryNotificationCallback : public IHXCallback
{
private:
    LONG32		    m_lRefCount;
    CRealAudioRenderer*	    m_pOutter;
    UINT32		    m_ulAudioTimeWanted;
    IHXScheduler*	    m_pScheduler;
    CallbackHandle	    m_PendingHandle;
    HX_BITFIELD		    m_bPendingCallback:1;


    CDryNotificationCallback(UINT32 ulAudioTimeWanted, CRealAudioRenderer* pOutter, IUnknown* pIUnknown)
	: m_lRefCount(0)
	, m_ulAudioTimeWanted(ulAudioTimeWanted)
	, m_pOutter(pOutter)
	, m_pScheduler(NULL)
	, m_PendingHandle(NULL)
	, m_bPendingCallback(FALSE)
    {
	if (m_pOutter != NULL)
	{
	    m_pOutter->AddRef();
	}

	if (HXR_OK != pIUnknown->QueryInterface(IID_IHXScheduler,
				(void **) &m_pScheduler))
	{
	    m_pScheduler = NULL;
	}
    };

    virtual ~CDryNotificationCallback()
    {
	HX_RELEASE(m_pOutter);
	HX_RELEASE(m_pScheduler);
    }

    PRIVATE_DESTRUCTORS_ARE_NOT_A_CRIME

public:
    static CDryNotificationCallback*
    CreateInstance(UINT32 ulAudioTimeWanted, CRealAudioRenderer* pOutter, IUnknown* pUnk)
    {
	CDryNotificationCallback* pInst = new CDryNotificationCallback(ulAudioTimeWanted, pOutter, pUnk);
	if (pInst != NULL)
	{
	    pInst->AddRef();
	}
	return pInst;
    }

    /*
     *  IUnknown methods
     */
    STDMETHODIMP QueryInterface(REFIID riid, void** ppvObj)
    {
	if (IsEqualIID(riid, IID_IUnknown))
	{
	    AddRef();
	    *ppvObj = (IUnknown*)this;
	    return HXR_OK;
	}
	else if (IsEqualIID(riid, IID_IHXCallback))
	{
	    AddRef();
	    *ppvObj = (IHXCallback*)this;
	    return HXR_OK;
	}

	*ppvObj = NULL;
	return HXR_NOINTERFACE;

    }

    STDMETHODIMP_(ULONG32)
    AddRef()
    {
	return InterlockedIncrement(&m_lRefCount);
    }

    STDMETHODIMP_(ULONG32)
    Release()
    {
	if (InterlockedDecrement(&m_lRefCount) > 0)
	{
	    return m_lRefCount;
	}

	delete this;
	return 0;
    }

    STDMETHODIMP
    Func()
    {
	m_PendingHandle = 0;
	m_bPendingCallback = FALSE;

	if (m_pOutter != NULL)
	{
	    return m_pOutter->AttemptToSatisfyDryRequest(m_ulAudioTimeWanted);
	}
	else
	{
	    return HXR_UNEXPECTED;
	}
    }

    STDMETHODIMP
    ScheduleCallback()
    {
	IHXCallback* pCallback = NULL;

	if (HXR_OK == QueryInterface(IID_IHXCallback, (void**)&pCallback))
	{
	    // we want to do the right thing here and remove a callback before we schedule a new one
	    // but we should never do that.
	    HX_ASSERT(!m_bPendingCallback);
	    if (m_bPendingCallback)
	    {

		if (m_pScheduler)
		{
		    m_pScheduler->Remove(m_PendingHandle);
		}
	    }

	    m_bPendingCallback = TRUE;

	    m_PendingHandle = m_pScheduler->RelativeEnter(pCallback, 0);
	}
	HX_RELEASE(pCallback);

	return HXR_OK;
    }

    STDMETHODIMP
    Cancel()
    {
	if (m_bPendingCallback && m_pScheduler)
	{
	    m_pScheduler->Remove(m_PendingHandle);
	    m_bPendingCallback = FALSE;
	    m_PendingHandle = 0;
	}
	return HXR_OK;
    }

    STDMETHODIMP
    UpdateAudioTimeWanted(UINT32 ulAudioTimeWanted)
    {
	HX_ASSERT(m_bPendingCallback);
	m_ulAudioTimeWanted = ulAudioTimeWanted;
	return HXR_OK;
    }
};
#endif /*_MACINTOSH*/


ULONG32 CRealAudioRenderer::_AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}

ULONG32 CRealAudioRenderer::_Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }

    delete this;
    return 0;
}

#endif // ndef _RARENDER_H_