pxschedu.cpp

linux下的一款播放器

            {
                retVal = HXR_FAIL;
            }
        }
        HX_RELEASE(pEffect);
    }
    else
    {
        retVal = HXR_UNEXPECTED;
    }

    return retVal;
}

HX_RESULT PXScheduler::GetImageDataInfo(REF(UINT32) rulHandle, REF(IHXBuffer*) rpStreamMimeStr,
                                        REF(UINT32) rulSessionHandle, REF(UINT32) rulPacketIndex,
                                        REF(UINT32) rulNumPackets, REF(UINT32) rulTimeStamp)
{
    HX_RESULT retVal = HXR_OK;

    if (m_pEffectItr && m_pRealPixFile)
    {
        PXEffect* pEffect = NULL;
        retVal            = m_pRealPixFile->GetCurrentEffect(m_pEffectItr, pEffect);
        if (SUCCEEDED(retVal))
        {
            if (pEffect->HasTarget() && pEffect->GetFirstUse())
            {
                IHXBuffer* pStreamMimeStr = NULL;
                retVal                     = m_pRealPixFile->GetImageStreamMimeType(pEffect->GetTarget(),
                                                                                    pStreamMimeStr);
                if (SUCCEEDED(retVal))
                {
                    rulHandle        = pEffect->GetTarget(),
                    HX_RELEASE(rpStreamMimeStr);
                    rpStreamMimeStr  = pStreamMimeStr;
                    rpStreamMimeStr->AddRef();
                    rulSessionHandle = m_ulSessionHandle;
                    rulPacketIndex   = m_ulPacketIndex;
                    rulNumPackets    = m_ulNumPackets;
                    rulTimeStamp     = (UINT32) (m_lCurrentTimeStamp >= 0 ? m_lCurrentTimeStamp : 0);
                }
                HX_RELEASE(pStreamMimeStr);
            }
            else
            {
                retVal = HXR_FAIL;
            }
        }
        HX_RELEASE(pEffect);
    }
    else
    {
        retVal = HXR_UNEXPECTED;
    }

    return retVal;
}

HX_RESULT PXScheduler::PacketSent(UINT32 ulPacketSize)
{
    HX_RESULT retVal = HXR_OK;

    if (m_pEffectItr && m_pRealPixFile)
    {
        if (!m_bSeeking)
        {
            if (m_ulPacketTypeState == PXWireFormatManager::kPacketTypeImageHeader)
            {
#ifdef XXXMEH_OUTPUT_DEBUG_STRING
                OutputDebugString("m_bSeeking = FALSE, image header -> image data\n");
#endif
                // Move to the kPacketTypeImageData state
                m_ulPacketTypeState = PXWireFormatManager::kPacketTypeImageData;
                // Increment time stamp by size of data sent
                m_lCurrentTimeStamp += (INT32) GetSendTime(ulPacketSize, m_pRealPixFile->GetBitrate());
            }
            else if (m_ulPacketTypeState == PXWireFormatManager::kPacketTypeImageData)
            {
                if (m_ulPacketIndex < m_ulNumPackets - 1)
                {
                    // We are not through sending all the packets of this image, so
                    // we continue to send this image and simply update the packet index.
                    m_ulPacketIndex++;
#ifdef XXXMEH_OUTPUT_DEBUG_STRING
                    OutputDebugString("m_bSeeking = FALSE, image data -> image data\n");
#endif
                }
                else
                {
                    // We just got through sending the last packet of this image (i.e. - packet N-1
                    // of packets numbered 0,1,...,N-1). Therefore, we transition to the
                    // kPacketTypeEffect state.
                    m_ulPacketTypeState = PXWireFormatManager::kPacketTypeEffect;
#ifdef XXXMEH_OUTPUT_DEBUG_STRING
                    OutputDebugString("m_bSeeking = FALSE, image data -> effect\n");
#endif
                }
                // We update the timestamp based on the size of the data sent.
                m_lCurrentTimeStamp += (INT32) GetSendTime(ulPacketSize, m_pRealPixFile->GetBitrate());
            }
            else if (m_ulPacketTypeState == PXWireFormatManager::kPacketTypeEffect)
            {
                // We just got through sending an effect packet, so we increment
                // the effect iterator and look at the next effect.
                PXEffect* pEffect = NULL;
                retVal            = m_pRealPixFile->GetAtNextEffect(m_pEffectItr, pEffect);
                if (SUCCEEDED(retVal))
                {
                    if (pEffect->HasTarget() && pEffect->GetFirstUse())
                    {
                        // The next effect has a first-use image associated with it. Therefore,
                        // we need to transition to a kPacketTypeImageHeader state.
                        m_ulPacketTypeState = PXWireFormatManager::kPacketTypeImageHeader;
#ifdef XXXMEH_OUTPUT_DEBUG_STRING
                        OutputDebugString("m_bSeeking = FALSE, effect -> image header\n");
#endif
                    }
#ifdef XXXMEH_OUTPUT_DEBUG_STRING
                    else
                    {
                        OutputDebugString("m_bSeeking = FALSE, effect -> effect\n");
                    }
#endif
                    // We set the time stamp to the StartSendTime() for this effect.
                    m_lCurrentTimeStamp = pEffect->GetStartSendTime();
                }
                HX_RELEASE(pEffect);
            }
        }
        else
        {
            if (m_ulPacketTypeState == PXWireFormatManager::kPacketTypeImageHeader)
            {
#ifdef XXXMEH_OUTPUT_DEBUG_STRING
                OutputDebugString("m_bSeeking = TRUE, image header -> image data\n");
#endif
                // Move to the kPacketTypeImageData state
                m_ulPacketTypeState = PXWireFormatManager::kPacketTypeImageData;
                // Increment time stamp by size of data sent
                m_lCurrentTimeStamp += (INT32) GetSendTime(ulPacketSize, m_pRealPixFile->GetBitrate());
            }
            else if (m_ulPacketTypeState == PXWireFormatManager::kPacketTypeImageData)
            {
                if (m_ulPacketIndex < m_ulNumPackets - 1)
                {
                    // We are not through sending all the packets of this image, so
                    // we continue to send this image and simply update the packet index.
                    m_ulPacketIndex++;
#ifdef XXXMEH_OUTPUT_DEBUG_STRING
                    OutputDebugString("m_bSeeking = TRUE, image data -> image data\n");
#endif
                }
                else
                {
                    // We just got through sending the last packet of this image (i.e. - packet N-1
                    // of packets numbered 0,1,...,N-1). We need to find the next effect
                    // that either: a) uses a cached image for the first time; or b)
                    // has a start time which is >= m_ulKeyScreenTime.
                    PXEffect* pEffect = NULL;
                    HX_RESULT rv      = m_pRealPixFile->GetAtNextEffect(m_pEffectItr, pEffect);
                    while (SUCCEEDED(rv))
                    {
#ifdef XXXMEH_OUTPUT_DEBUG_STRING
                        char szDbgStr[128]; /* Flawfinder: ignore */
                        sprintf(szDbgStr, "m_bSeeking = TRUE, looking at effect with start=%lu (key=%lu)\n", /* Flawfinder: ignore */
                                pEffect->GetStart(), m_ulKeyScreenTime);
                        OutputDebugString(szDbgStr);
#endif
                        if (pEffect->GetStart() >= m_ulKeyScreenTime)
                        {
                            m_bSeeking = FALSE;
                            if (pEffect->HasTarget() && pEffect->GetFirstUse())
                            {
#ifdef XXXMEH_OUTPUT_DEBUG_STRING
                                OutputDebugString("m_bSeeking = TRUE, switching off m_bSeeking, image data -> image header\n");
#endif
                                m_ulPacketTypeState = PXWireFormatManager::kPacketTypeImageHeader;
                            }
                            else
                            {
#ifdef XXXMEH_OUTPUT_DEBUG_STRING
                                OutputDebugString("m_bSeeking = TRUE, switching off m_bSeeking, image data -> effect\n");
#endif
                                m_ulPacketTypeState = PXWireFormatManager::kPacketTypeEffect;
                            }
                            m_lCurrentTimeStamp = pEffect->GetStartSendTime();
                            break;
                        }
                        else
                        {
                            if (pEffect->HasTarget() && pEffect->GetFirstUse() &&
                                IsImageCachedAtTime(pEffect->GetTarget(), m_ulKeyScreenTime))
                            {
                                m_ulPacketTypeState = PXWireFormatManager::kPacketTypeImageHeader;
                                m_lCurrentTimeStamp = pEffect->GetStartSendTime();
#ifdef XXXMEH_OUTPUT_DEBUG_STRING
                                OutputDebugString("m_bSeeking = TRUE, image data -> image header\n");
#endif
                                break;
                            }
                        }

                        HX_RELEASE(pEffect);
                        rv = m_pRealPixFile->GetAtNextEffect(m_pEffectItr, pEffect);
                    }
                    HX_RELEASE(pEffect);
                }
            }
        }
    }
    else
    {
        retVal = HXR_UNEXPECTED;
    }

    return retVal;
}

HX_RESULT PXScheduler::SeekSetup(UINT32 ulSeekTime)
{
#ifdef XXXMEH_OUTPUT_DEBUG_STRING
    char szDbgStr[128]; /* Flawfinder: ignore */
    sprintf(szDbgStr, "SeekSetup(%lu)\n", ulSeekTime); /* Flawfinder: ignore */
    OutputDebugString(szDbgStr);
#endif
    HX_RESULT retVal = HXR_OK;

    if (m_pRealPixFile)
    {
        // Calculate time of latest full-screen draw effect which is 
        // not later than ulSeekToTime. To do this, we run backwards
        // through the effects, and start looking for the first full-screen
        // write before ulSeekToTime.
        m_ulKeyScreenTime = 0;
        void* pItr        = NULL;
        retVal            = m_pRealPixFile->GetEffectTailIterator(pItr);
        if (SUCCEEDED(retVal))
        {
            PXEffect* pEffect = NULL;
            HX_RESULT rv      = m_pRealPixFile->GetPrevEffect(pItr, pEffect);
            while (SUCCEEDED(rv))
            {
                if (pEffect->GetStart()      <= ulSeekTime                         &&
                    (!pEffect->GetDstWidth() ||
                     (pEffect->GetDstWidth() == m_pRealPixFile->GetDisplayWidth()))  &&
                    (!pEffect->GetDstHeight() ||
                     (pEffect->GetDstHeight()  == m_pRealPixFile->GetDisplayHeight())) &&
                    pEffect->GetEffectType() != PXEffect::kEffectTypeViewChange    &&
                    (pEffect->GetEffectType() != PXEffect::kEffectTypeFadeOut ||
                     (pEffect->GetEffectType() == PXEffect::kEffectTypeFadeOut &&
                      pEffect->GetEnd()        <  ulSeekTime)))
                {
                    m_ulKeyScreenTime = pEffect->GetStart();
                    break;
                }
                HX_RELEASE(pEffect);
                rv = m_pRealPixFile->GetPrevEffect(pItr, pEffect);
            }
            HX_RELEASE(pEffect);
#ifdef XXXMEH_OUTPUT_DEBUG_STRING
            char szDbgStr[128]; /* Flawfinder: ignore */
            sprintf(szDbgStr, "   m_ulKeyScreenTime=%lu\n", m_ulKeyScreenTime); /* Flawfinder: ignore */
            OutputDebugString(szDbgStr);
#endif

            // Rewind the packet type state and effect iterator
            retVal = Rewind();
            if (SUCCEEDED(retVal))
            {
                m_bSeeking = TRUE;
                HX_RELEASE(pEffect);
                rv = m_pRealPixFile->GetCurrentEffect(m_pEffectItr, pEffect);
                while (SUCCEEDED(rv))
                {
                    if (pEffect->GetStart() >= m_ulKeyScreenTime)
                    {
                        m_bSeeking = FALSE;
                        if (pEffect->HasTarget() && pEffect->GetFirstUse())
                        {
                            m_ulPacketTypeState = PXWireFormatManager::kPacketTypeImageHeader;
                        }
                        else
                        {
                            m_ulPacketTypeState = PXWireFormatManager::kPacketTypeEffect;
                        }
                        m_lCurrentTimeStamp = pEffect->GetStartSendTime();
                        break;
                    }
                    else
                    {
                        if (pEffect->HasTarget() &&
                            IsImageCachedAtTime(pEffect->GetTarget(), m_ulKeyScreenTime))
                        {
                            m_ulPacketTypeState = PXWireFormatManager::kPacketTypeImageHeader;
                            m_lCurrentTimeStamp = pEffect->GetStartSendTime();
                            break;
                        }
                    }
                    HX_RELEASE(pEffect);
                    rv = m_pRealPixFile->GetAtNextEffect(m_pEffectItr, pEffect);
                }
                HX_RELEASE(pEffect);
            }
        }
    }
    else
    {
        retVal = HXR_UNEXPECTED;
    }

    return retVal;
}

HX_RESULT PXScheduler::Rewind()
{
    HX_RESULT retVal = HXR_FAIL;

    if (m_pRealPixFile)
    {
        // Initialize the effect iterator
        retVal = m_pRealPixFile->GetEffectHeadIterator(m_pEffectItr);
        if (SUCCEEDED(retVal))
        {
            // Initialize the packet type state
            PXEffect* pCurEffect = NULL;
            retVal               = m_pRealPixFile->GetCurrentEffect(m_pEffectItr, pCurEffect);
            if (SUCCEEDED(retVal))
            {
                if (pCurEffect->HasTarget() && pCurEffect->GetFirstUse())
                {
                    m_ulPacketTypeState = PXWireFormatManager::kPacketTypeImageHeader;
                }
                else
                {
                    m_ulPacketTypeState = PXWireFormatManager::kPacketTypeEffect;
                }
                // Set the time stamp
                m_lCurrentTimeStamp = pCurEffect->GetStartSendTime();
            }
            HX_RELEASE(pCurEffect);
        }
    }

    return retVal;
}

BOOL PXScheduler::IsImageCachedAtTime(UINT32 ulHandle, UINT32 ulTime)
{
    BOOL bRet = FALSE;

    void*     pItr   = NULL;
    HX_RESULT retVal = m_pRealPixFile->GetEffectHeadIterator(pItr);
    if (SUCCEEDED(retVal))
    {
        BOOL      bSawFirstUse = FALSE;
        BOOL      bSawLastUse  = FALSE;
        PXEffect* pEffect      = NULL;
        retVal                 = m_pRealPixFile->GetNextEffect(pItr, pEffect);
        while (SUCCEEDED(retVal))
        {
            if (pEffect->GetStart() >= ulTime)
            {
                break;
            }

            if (pEffect->HasTarget() && pEffect->GetTarget() == ulHandle)
            {
                if (pEffect->GetFirstUse())
                {
                    bSawFirstUse = TRUE;
                }
                if (pEffect->GetLastUse())
                {
                    bSawLastUse = TRUE;
                }
            }

            HX_RELEASE(pEffect);
            retVal = m_pRealPixFile->GetNextEffect(pItr, pEffect);
        }
        HX_RELEASE(pEffect);

        if (bSawFirstUse && !bSawLastUse)
        {
            bRet = TRUE;
        }
    }

    return bRet;
}