pxcgifrn.cpp

linux下的一款播放器

                rImageDim.cy     = pGIFCodec->GetLogicalScreenHeight();
                rulNumFrames     = pGIFCodec->GetNumImages();
                rpImageInfo      = NULL;
                // Create a session object
                CGIFRendererSession* pSession = new CGIFRendererSession();
                if (pSession)
                {
                    // AddRef the object
                    pSession->AddRef();
                    // Set the session parameters
                    pSession->m_pGIFCodec   = pGIFCodec;
                    pSession->m_pGIFCodec->AddRef();
                    pSession->m_ulNumFrames = rulNumFrames;
                    // Allocate an array of FrameInfo structs
                    pSession->m_pFrameInfo  = new CGIFRendererSession::FrameInfo [rulNumFrames];
                    if (pSession->m_pFrameInfo)
                    {
                        // NULL out the frame info structs output buffer pointers
                        for (UINT32 i = 0; i < rulNumFrames; i++)
                        {
                            pSession->m_pFrameInfo[i].m_pOutputBuffer = NULL;
                        }

                        // Add this session to the map
                        retVal = m_pMapManager->AddEntry((void*) pSession, rulSessionHandle);
                        if (SUCCEEDED(retVal))
                        {
                            // AddRef the session since it's now in the map
                            pSession->AddRef();
                            // Create an IHXValues for the image info
                            IHXValues* pImageInfo = NULL;
                            m_pCommonClassFactory->CreateInstance(CLSID_IHXValues, (void**) &pImageInfo);
                            if (pImageInfo)
                            {
                                // Set the loop count in the image info struct
                                pImageInfo->SetPropertyULONG32("LoopCount", pGIFCodec->GetLoopCount());
                                // Assign the out parameter
                                rpImageInfo = pImageInfo;
                                rpImageInfo->AddRef();
                            }
                            HX_RELEASE(pImageInfo);
                        }
                    }
                    else
                    {
                        retVal = HXR_OUTOFMEMORY;
                    }
                }
                else
                {
                    retVal = HXR_OUTOFMEMORY;
                }
                HX_RELEASE(pSession);
            }
        }
        HX_RELEASE(pGIFCodec);
    }

    return retVal;
}

STDMETHODIMP CRealPixGIFRendererCodec::GetFrameInfo(UINT32           ulSessionHandle,
                                                    UINT32           ulFrameNum,
                                                    REF(HXxRect)     rFrameDim,
                                                    REF(IHXValues*) rpMoreInfo)
{
    HX_RESULT retVal = HXR_FAIL;

    if (m_pMapManager)
    {
        CGIFRendererSession* pSession = NULL;
        m_pMapManager->GetEntry(ulSessionHandle, (void**) &pSession);
        if (pSession)
        {
            if (pSession->m_pGIFCodec)
            {
                if (ulFrameNum < pSession->m_pGIFCodec->GetNumImages())
                {
                    CGIFImage* pImage = pSession->m_pGIFCodec->GetImage(ulFrameNum);
                    if (pImage)
                    {
                        // Set the frame dimensions in the session
                        pSession->m_pFrameInfo[ulFrameNum].m_cFrameDim.left   = pImage->GetImageLeft();
                        pSession->m_pFrameInfo[ulFrameNum].m_cFrameDim.top    = pImage->GetImageTop();
                        pSession->m_pFrameInfo[ulFrameNum].m_cFrameDim.right  = pImage->GetImageLeft() +
                                                                                pImage->GetImageWidth();
                        pSession->m_pFrameInfo[ulFrameNum].m_cFrameDim.bottom = pImage->GetImageTop() +
                                                                                pImage->GetImageHeight();
                        // Set the outgoing frame dimensions
                        rFrameDim = pSession->m_pFrameInfo[ulFrameNum].m_cFrameDim;
                        // Create an IHXValues
                        IHXValues* pValues = NULL;
                        retVal              = m_pCommonClassFactory->CreateInstance(CLSID_IHXValues,
                                                                                    (void**) &pValues);
                        if (pValues)
                        {
                            pValues->SetPropertyULONG32("DelayTime",        pImage->GetDelayTime());
                            pValues->SetPropertyULONG32("DisposalMethod",   pImage->GetDisposalMethod());
			    pValues->SetPropertyULONG32("UsesAlphaChannel", (pImage->Transparent() ? 1 : 0));
                            // Set the outgoing parameter
                            HX_RELEASE(rpMoreInfo);
                            rpMoreInfo = pValues;
                            rpMoreInfo->AddRef();
                            retVal = HXR_OK;
                        }
                        HX_RELEASE(pValues);
                    }
                }
            }
        }
    }

    return retVal;
}

STDMETHODIMP CRealPixGIFRendererCodec::SetDecompressParam(UINT32      ulSessionHandle,
                                                          UINT32      ulFrameNum,
                                                          IHXBuffer* pOutputBuffer,
                                                          HXxSize     cFrameDim,
                                                          UINT32      ulRowStride,
                                                          UINT32      ulBitsPerPixel,
                                                          UINT32      ulColorFormat,
                                                          BOOL        bRowsInverted,
                                                          IHXValues* pMoreParam)
{
    HX_RESULT retVal = HXR_FAIL;

    if (m_pMapManager)
    {
        CGIFRendererSession* pSession = NULL;
        m_pMapManager->GetEntry(ulSessionHandle, (void**) &pSession);
        if (pSession)
        {
            if (ulFrameNum < pSession->m_ulNumFrames &&
                pOutputBuffer                        &&
                ulBitsPerPixel == 32                 &&
                ulColorFormat == HX_RGB)
            {
                if (pSession->m_pGIFCodec)
                {
                    if (ulFrameNum < pSession->m_pGIFCodec->GetNumImages())
                    {
                        CGIFImage* pImage = pSession->m_pGIFCodec->GetImage(ulFrameNum);
                        if (pImage)
                        {
                            if (cFrameDim.cx == HXxRECT_WIDTH(pSession->m_pFrameInfo[ulFrameNum].m_cFrameDim) &&
                                cFrameDim.cy == HXxRECT_HEIGHT(pSession->m_pFrameInfo[ulFrameNum].m_cFrameDim))
                            {
                                // Set the frame parameters
                                pSession->m_pFrameInfo[ulFrameNum].m_pOutputBuffer  = pOutputBuffer;
                                pSession->m_pFrameInfo[ulFrameNum].m_ulRowStride    = ulRowStride;
                                pSession->m_pFrameInfo[ulFrameNum].m_ulBitsPerPixel = ulBitsPerPixel;
                                pSession->m_pFrameInfo[ulFrameNum].m_ulColorFormat  = ulColorFormat;
                                pSession->m_pFrameInfo[ulFrameNum].m_bRowsInverted  = bRowsInverted;
                                // Addref the output buffer
                                pSession->m_pFrameInfo[ulFrameNum].m_pOutputBuffer->AddRef();
                                retVal = HXR_OK;
                            }
                        }
                    }
                }
            }
        }
    }

    return retVal;
}

STDMETHODIMP CRealPixGIFRendererCodec::Decompress(UINT32      ulSessionHandle,
                                                  IHXBuffer* pBuffer,
                                                  IHXBuffer* pOpaquePacketData)
{
    HX_RESULT retVal = HXR_OK;

    if (m_pMapManager)
    {
        CGIFRendererSession* pSession = NULL;
        retVal = m_pMapManager->GetEntry(ulSessionHandle, (void**) &pSession);
        if (SUCCEEDED(retVal))
        {
            if (pBuffer && pOpaquePacketData && pSession->m_pGIFCodec)
            {
                if (pSession->m_pGIFCodec->GetValid())
                {
                    if (pSession->m_pGIFCodec->GetNeedPacket())
                    {
                        if (!pSession->m_pGIFCodec->DecompressFinished())
                        {
                            BYTE* pBuf = pOpaquePacketData->GetBuffer();
                            if (pBuf)
                            {
                                // Unpack seq num
                                UINT32 ulSeqNum = 0;
                                UnPack32(pBuf, ulSeqNum);
                                // Unpack flags
                                UINT32 ulFlags = 0;
                                UnPack32(pBuf, ulFlags);
                                // Recover the "new frame" flag
                                BOOL bNewImage = (ulFlags & 1 ? TRUE : FALSE);
                                // Decompress this buffer
                                retVal = pSession->m_pGIFCodec->Decompress(pBuffer->GetBuffer(),
                                                                           pBuffer->GetSize(),
                                                                           bNewImage);
                                if (SUCCEEDED(retVal))
                                {
                                    if (pSession->m_pGIFCodec->DecompressFinished())
                                    {
                                        for (UINT32 i = 0; i < pSession->m_ulNumFrames; i++)
                                        {
                                            retVal = pSession->m_pGIFCodec->GetRGB32(i,
                                                                                     pSession->m_pFrameInfo[i].m_pOutputBuffer->GetBuffer(),
                                                                                     pSession->m_pFrameInfo[i].m_ulRowStride,
                                                                                     pSession->m_pFrameInfo[i].m_bRowsInverted);
                                            if (FAILED(retVal))
                                            {
                                                break;
                                            }
                                        }
                                    }
                                }
                            }
                            else
                            {
                                retVal = HXR_FAIL;
                            }
                        }
                    }
                    else
                    {
                        pSession->m_pGIFCodec->SetNeedPacket(TRUE);
                    }
                }
            }
            else
            {
                retVal = HXR_FAIL;
            }
        }
    }
    else
    {
        retVal = HXR_UNEXPECTED;
    }

    return retVal;
}

STDMETHODIMP CRealPixGIFRendererCodec::GetDecompressStatus(UINT32     ulSessionHandle,
                                                           REF(INT32) rlStatus)
{
    HX_RESULT retVal = HXR_FAIL;

    if (m_pMapManager)
    {
        CGIFRendererSession* pSession = NULL;
        retVal                        = m_pMapManager->GetEntry(ulSessionHandle, (void**) &pSession);
        if (SUCCEEDED(retVal))
        {
            if (pSession->m_pGIFCodec)
            {
                if (pSession->m_pGIFCodec->GetValid())
                {
                    if (pSession->m_pGIFCodec->DecompressFinished())
                    {
                        rlStatus = DECOMPRESS_STATUS_FINISHED;
                    }
                    else
                    {
                        rlStatus = DECOMPRESS_STATUS_INPROGRESS;
                    }
                }
                else
                {
                    rlStatus = DECOMPRESS_STATUS_ABORTED;
                }
            }
            else
            {
                retVal = HXR_FAIL;
            }
        }
    }

    return retVal;
}

STDMETHODIMP CRealPixGIFRendererCodec::FinishDecompress(UINT32 ulSessionHandle)
{
    HX_RESULT retVal = HXR_FAIL;

    if (m_pMapManager)
    {
        CGIFRendererSession* pSession = NULL;
        retVal = m_pMapManager->DeleteEntry(ulSessionHandle, (void**) &pSession);
        HX_RELEASE(pSession);
    }

    return retVal;
}

HX_RESULT STDAPICALLTYPE CRealPixGIFRendererCodec::HXCreateInstance(IUnknown** ppIUnknown)
{
    HX_RESULT retVal = HXR_OK;

    if (ppIUnknown)
    {
        // Create renderer codec
        CRealPixGIFRendererCodec* pCodec = new CRealPixGIFRendererCodec();
        if (pCodec)
        {
            // QI for IUnknown
            retVal = pCodec->QueryInterface(IID_IUnknown, (void**) ppIUnknown);
        }
        else
        {
            retVal = HXR_OUTOFMEMORY;
        }
        if (FAILED(retVal))
        {
            HX_DELETE(pCodec);
        }
    }
    else
    {
        retVal = HXR_FAIL;
    }

    return retVal;
}

void CRealPixGIFRendererCodec::ReleaseAllSessions()
{
    if (m_pMapManager)
    {
        UINT32               ulHandle = 0;
        CGIFRendererSession* pSession = NULL;
        HX_RESULT            retVal   = m_pMapManager->GetFirstEntry(ulHandle, (void**) &pSession);
        while (SUCCEEDED(retVal))
        {
            HX_RELEASE(pSession);
            retVal = m_pMapManager->GetNextEntry(ulHandle, (void**) &pSession);
        }
        m_pMapManager->DeleteAllEntries();
    }
}