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src/Source/LibJXR/image/encode/strenc.c  view on Meta::CPAN

    pSC->ProcessBottom = processMacroblock;
    pSC->ProcessBottomRight = processMacroblock;

    pSC->m_pNextSC = NULL;
    pSC->m_bSecondary = FALSE;
}

/*************************************************************************
   Streaming API init
*************************************************************************/
Int ImageStrEncInit(
    CWMImageInfo* pII,
    CWMIStrCodecParam *pSCP,
    CTXSTRCODEC* pctxSC)
{
    static size_t cbChannels[BD_MAX] = {2, 4};

    size_t cbChannel = 0, cblkChroma = 0, i;
    size_t cbMacBlockStride = 0, cbMacBlockChroma = 0, cMacBlock = 0;

    CWMImageStrCodec* pSC = NULL, *pNextSC = NULL;
    char* pb = NULL;
    size_t cb = 0;
    Bool b32bit = sizeof(size_t) == 4;

    Int err;

    if(ValidateArgs(pII, pSCP) != ICERR_OK){
        goto ErrorExit;
    }

    //================================================
    *pctxSC = NULL;

    //================================================
    cbChannel = cbChannels[pSCP->bdBitDepth];
    cblkChroma = cblkChromas[pSCP->cfColorFormat];
    cbMacBlockStride = cbChannel * 16 * 16;
    cbMacBlockChroma = cbChannel * 16 * cblkChroma;
    cMacBlock = (pII->cWidth + 15) / 16;

    //================================================
    cb = sizeof(*pSC) + (128 - 1) + (PACKETLENGTH * 4 - 1) + (PACKETLENGTH * 2 ) + sizeof(*pSC->pIOHeader);
    i = cbMacBlockStride + cbMacBlockChroma * (pSCP->cChannel - 1);
    if(b32bit) // integer overlow/underflow check for 32-bit system
        if(((cMacBlock >> 15) * i) & 0xffff0000)
            return ICERR_ERROR;
    i *= cMacBlock * 2;
    cb += i;

    pb = malloc(cb);
    if (NULL == pb)
    {
        goto ErrorExit;
    }
    memset(pb, 0, cb);

    //================================================
    pSC = (CWMImageStrCodec*)pb; pb += sizeof(*pSC);

    // Set up perf timers
    PERFTIMER_ONLY(pSC->m_fMeasurePerf = pSCP->fMeasurePerf);
    PERFTIMER_NEW(pSC->m_fMeasurePerf, &pSC->m_ptEndToEndPerf);
    PERFTIMER_NEW(pSC->m_fMeasurePerf, &pSC->m_ptEncDecPerf);
    PERFTIMER_START(pSC->m_fMeasurePerf, pSC->m_ptEndToEndPerf);
    PERFTIMER_START(pSC->m_fMeasurePerf, pSC->m_ptEncDecPerf);
    PERFTIMER_COPYSTARTTIME(pSC->m_fMeasurePerf, pSC->m_ptEncDecPerf, pSC->m_ptEndToEndPerf);

    pSC->m_param.cfColorFormat = pSCP->cfColorFormat;
    pSC->m_param.bAlphaChannel = (pSCP->uAlphaMode == 3);
    pSC->m_param.cNumChannels = pSCP->cChannel;
    pSC->m_param.cExtraPixelsTop = pSC->m_param.cExtraPixelsBottom
        = pSC->m_param.cExtraPixelsLeft = pSC->m_param.cExtraPixelsRight = 0;

    pSC->cbChannel = cbChannel;

    pSC->m_param.bTranscode = pSC->bTileExtraction = FALSE;

    //================================================
    InitializeStrEnc(pSC, pII, pSCP);

    //================================================
    // 2 Macro Row buffers for each channel
    pb = ALIGNUP(pb, 128);
    for (i = 0; i < pSC->m_param.cNumChannels; i++) {
        pSC->a0MBbuffer[i] = (PixelI*)pb; pb += cbMacBlockStride * pSC->cmbWidth;
        pSC->a1MBbuffer[i] = (PixelI*)pb; pb += cbMacBlockStride * pSC->cmbWidth;
        cbMacBlockStride = cbMacBlockChroma;
    }

    //================================================
    // lay 2 aligned IO buffers just below pIO struct
    pb = (char*)ALIGNUP(pb, PACKETLENGTH * 4) + PACKETLENGTH * 2;
    pSC->pIOHeader = (BitIOInfo*)pb;

    //================================================
    err = StrEncInit(pSC);
    if (ICERR_OK != err)
        goto ErrorExit;

    // if interleaved alpha is needed
    if (pSC->m_param.bAlphaChannel) {
        cbMacBlockStride = cbChannel * 16 * 16;
        // 1. allocate new pNextSC info
        //================================================
        cb = sizeof(*pNextSC) + (128 - 1) + cbMacBlockStride * cMacBlock * 2;
        pb = malloc(cb);
        if (NULL == pb)
        {
            goto ErrorExit;
        }
        memset(pb, 0, cb);
        //================================================
        pNextSC = (CWMImageStrCodec*)pb; pb += sizeof(*pNextSC);

        // 2. initialize pNextSC
        pNextSC->m_param.cfColorFormat = Y_ONLY;
        pNextSC->m_param.cNumChannels = 1;
        pNextSC->m_param.bAlphaChannel = TRUE;
        pNextSC->cbChannel = cbChannel;
        //================================================