vidrendf.cpp

linux下的一款播放器

 *  Method:
 *    CVideoFormat::Dequeue
 *
 */
CMediaPacket* CVideoFormat::Dequeue(void)
{
    CMediaPacket* pPacket = (CMediaPacket*) m_pOutputQueue->Get();

#ifdef ENABLE_FRAME_TRACE
    if (pPacket && (ulFrameTraceIdx < MAX_FRAME_TRACE_ENTRIES))
    {
	frameTraceArray[ulFrameTraceIdx][2] = pPacket->m_ulTime;
	frameTraceArray[ulFrameTraceIdx][0] = 
	    (LONG32) pPacket->m_pData;
	frameTraceArray[ulFrameTraceIdx++][1] = 'G';
    }
#endif	// ENABLE_FRAME_TRACE

    return pPacket;
}


/****************************************************************************
 *  Method:
 *    CVideoFormat::Reset
 *
 */
void CVideoFormat::Reset(void)
{
    _Reset();
}

void CVideoFormat::_Reset()
{
    m_pMutex->Lock();

    CMediaPacket* pFrame;
    
    while (!m_InputQueue.IsEmpty())
    {
	pFrame = (CMediaPacket*) m_InputQueue.RemoveHead();
	
	pFrame->Clear();
	delete pFrame;
    }
    
    FlushOutputQueue();

    m_pMutex->Unlock();
}


/****************************************************************************
 *  Method:
 *    CVideoFormat::DecodeFrame
 *
 */
void CVideoFormat::FlushOutputQueue(void)
{
    CMediaPacket* pFrame;

    if (m_pOutputQueue)
    {
	while ((pFrame = (CMediaPacket*) m_pOutputQueue->Get()) != NULL)
	{
#ifdef ENABLE_FRAME_TRACE
	    if (ulFrameTraceIdx < MAX_FRAME_TRACE_ENTRIES)
	    {
		frameTraceArray[ulFrameTraceIdx][2] = pFrame->m_ulTime;
		frameTraceArray[ulFrameTraceIdx][0] = 
		    (LONG32) pFrame->m_pData;
		frameTraceArray[ulFrameTraceIdx++][1] = 'F';
	    }
#endif	// ENABLE_FRAME_TRACE

	    pFrame->Clear();
	    delete pFrame;
	}
    }
}


/****************************************************************************
 *  Method:
 *    CVideoFormat::DecodeFrame
 *
 */
BOOL CVideoFormat::DecodeFrame(void)
{
    CMediaPacket* pEncodedPacket;
    CMediaPacket* pDecodedPacket = NULL;
    ULONG32 ulLoopCounter = 0;

    m_pVideoRenderer->BltIfNeeded();

    m_pDecoderMutex->Lock();
    m_pMutex->Lock();
    
    if ((!m_InputQueue.IsEmpty()) &&
	(!m_pOutputQueue->IsFull()) &&
	(!m_bDecodeSuspended))
    {
	do
	{
	    pEncodedPacket = (CMediaPacket*) m_InputQueue.RemoveHead();

	    m_pMutex->Unlock();

	    pDecodedPacket = CreateDecodedPacket(pEncodedPacket);

	    if (pDecodedPacket)
	    {
#ifdef ENABLE_FRAME_TRACE
		if (ulFrameTraceIdx < MAX_FRAME_TRACE_ENTRIES)
		{
		    frameTraceArray[ulFrameTraceIdx][2] = pDecodedPacket->m_ulTime;
		    frameTraceArray[ulFrameTraceIdx][0] = 
			(LONG32) pDecodedPacket->m_pData;
		    frameTraceArray[ulFrameTraceIdx++][1] = 'D';
		}
#endif	// ENABLE_FRAME_TRACE

		m_pOutputQueue->Put(pDecodedPacket);
		
		if (pDecodedPacket->m_pData)
		{
		    m_pDecoderMutex->Unlock();
		    m_pVideoRenderer->BltIfNeeded();
		    return TRUE;
		}
	    }

	    m_pDecoderMutex->Unlock();

            if( m_LastError == HXR_OUTOFMEMORY )
            {
                m_bDecodeSuspended = TRUE;
            }
            else
            {
                m_pVideoRenderer->BltIfNeeded();
            }
	    ulLoopCounter++;

	    m_pDecoderMutex->Lock();
	    m_pMutex->Lock();
	} while ((!m_InputQueue.IsEmpty()) &&
		 (!m_pOutputQueue->IsFull()) &&
		 ((ulLoopCounter++) < MAX_DECODE_SPIN) &&
		 (!m_bDecodeSuspended));
    }

    m_pMutex->Unlock();
    m_pDecoderMutex->Unlock();
    
    return pDecodedPacket ? TRUE : FALSE;
}


/****************************************************************************
 *  Method:
 *    CVideoFormat::ReturnDecodedPacket
 *
 */
BOOL CVideoFormat::ReturnDecodedPacket(CMediaPacket* pDecodedPacket)
{
    BOOL bPacketAccepted = FALSE;

    if (pDecodedPacket)
    {
#ifdef ENABLE_FRAME_TRACE
	if (ulFrameTraceIdx < MAX_FRAME_TRACE_ENTRIES)
	{
	    frameTraceArray[ulFrameTraceIdx][2] = pDecodedPacket->m_ulTime;
	    frameTraceArray[ulFrameTraceIdx][0] = 
		(LONG32) pDecodedPacket->m_pData;
	    frameTraceArray[ulFrameTraceIdx++][1] = 'D';
	}
#endif	// ENABLE_FRAME_TRACE
	    
	bPacketAccepted = m_pOutputQueue->Put(pDecodedPacket);
    }

    return bPacketAccepted;
}


/****************************************************************************
 *  Method:
 *    CVideoFormat::GetMaxDecodedFrames
 *
 */
ULONG32 CVideoFormat::GetMaxDecodedFrames(void)
{
    return MAX_BUFFERED_DECODED_FRAMES;
}


/****************************************************************************
 *  Method:
 *    CVideoFormat::CreateDecodedPacket
 *
 */
CMediaPacket* CVideoFormat::CreateDecodedPacket(CMediaPacket* pCodedPacket)
{
    CMediaPacket* pDecodedPacket = NULL;

    if (pCodedPacket != NULL)
    {
	pCodedPacket->Clear();
	delete pCodedPacket;
	pCodedPacket = NULL;
    }

    return pDecodedPacket;
}


/****************************************************************************
 *  Method:
 *    CVideoFormat::OnDecodedPacketRelease
 *
 */
void CVideoFormat::OnDecodedPacketRelease(CMediaPacket* &pPacket)
{
#ifdef ENABLE_FRAME_TRACE
    if (ulFrameTraceIdx < MAX_FRAME_TRACE_ENTRIES)
    {
	frameTraceArray[ulFrameTraceIdx][2] = pPacket->m_ulTime;
	frameTraceArray[ulFrameTraceIdx][0] = 
	    (LONG32) pPacket->m_pData;
	frameTraceArray[ulFrameTraceIdx++][1] = 'R';
    }
#endif	// ENABLE_FRAME_TRACE
    ;
}

/****************************************************************************
 *  Method:
 *    CVideoFormat::InitBitmapInfoHeader
 *
 */
HX_RESULT CVideoFormat::InitBitmapInfoHeader(
    HXBitmapInfoHeader &BitmapInfoHeader,
    CMediaPacket* pVideoPacket)

{
    HX_RESULT retVal = HXR_OK;

    return retVal;
}


/****************************************************************************
 *  Method:
 *    CVideoFormat::GetDefaultPreroll
 *
 */
ULONG32 CVideoFormat::GetDefaultPreroll(IHXValues* pValues)
{
    return FORMAT_DEFAULT_PREROLL;
}


/****************************************************************************
 *  Method:
 *    CVideoFormat::GetMinimumPreroll
 *
 */
ULONG32 CVideoFormat::GetMinimumPreroll(IHXValues* pValues)
{
    return FORMAT_MINIMUM_PREROLL;
}


/****************************************************************************
 *  Method:
 *    CVideoFormat::GetMaximumPreroll
 *
 */
ULONG32 CVideoFormat::GetMaximumPreroll(IHXValues* pValues)
{
    return FORMAT_MAXIMUM_PREROLL;
}

/****************************************************************************
 *  Method:
 *    CVideoFormat::GetMimeTypes
 *
 */
const char** CVideoFormat::GetMimeTypes(void)
{
    return NULL;
}


// *** IUnknown methods ***

/****************************************************************************
*  IUnknown::AddRef                                            ref:  hxcom.h
*
*  This routine increases the object reference count in a thread safe
*  manner. The reference count is used to manage the lifetime of an object.
*  This method must be explicitly called by the user whenever a new
*  reference to an object is used.
*/
STDMETHODIMP_(ULONG32) CVideoFormat::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}

/****************************************************************************
*  IUnknown::Release                                           ref:  hxcom.h
*
*  This routine decreases the object reference count in a thread safe
*  manner, and deletes the object if no more references to it exist. It must
*  be called explicitly by the user whenever an object is no longer needed.
*/
STDMETHODIMP_(ULONG32) CVideoFormat::Release()
{
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }
    
    delete this;
    return 0;
}

/****************************************************************************
*  IUnknown::QueryInterface                                    ref:  hxcom.h
*
*  This routine indicates which interfaces this object supports. If a given
*  interface is supported, the object's reference count is incremented, and
*  a reference to that interface is returned. Otherwise a NULL object and
*  error code are returned. This method is called by other objects to
*  discover the functionality of this object.
*/
STDMETHODIMP CVideoFormat::QueryInterface(REFIID riid, void** ppvObj)
{
    if (IsEqualIID(riid, IID_IUnknown))
    {
	AddRef();
	*ppvObj = (IUnknown*)(IHXPlugin*) this;
	return HXR_OK;
    }
    
    *ppvObj = NULL;
    return HXR_NOINTERFACE;
}

HX_RESULT
CVideoFormat::GetLastError()
{
    return m_LastError;
}