mp4decvops.c

这是在PCA下的基于IPP库示例代码例子,在网上下了IPP的库之后,设置相关参数就可以编译该代码.

                    ac_pred_flag = mp4_GetBit(pInfo);
                if (mp4_DecodeCBPY_P(pInfo, &cbpy, mb_type) != MP4_STATUS_OK)
                    return MP4_STATUS_ERROR;
                quantPred = quant;
                if (mb_type == IPPVC_MBTYPE_INTER_Q || mb_type == IPPVC_MBTYPE_INTRA_Q)
                    mp4_UpdateQuant(pInfo, quant);
                if (interlaced) {
                    dct_type = 0;
                    field_prediction = 0;
                    if (mb_type >= IPPVC_MBTYPE_INTRA || (cbpy + cbpc) != 0)
                        dct_type = mp4_GetBit(pInfo);
                    if ((mb_type == IPPVC_MBTYPE_INTER || mb_type == IPPVC_MBTYPE_INTER_Q) && !mcsel) {
                        field_prediction = mp4_GetBit(pInfo);
                        if (field_prediction) {
                            mb_ftfr = mp4_GetBit(pInfo);
                            mb_fbfr = mp4_GetBit(pInfo);
                        }
                    }
                }
                pat = (cbpy << 2) + cbpc;
                if (mb_type >= IPPVC_MBTYPE_INTRA) {
                    if (curRow == 0 && j == 0)
                        quantPred = quant;
                    dcVLC = (quantPred < mp4_DC_vlc_Threshold[pInfo->VisualObject.VideoObject.VideoObjectPlane.intra_dc_vlc_thr]) ? 1 : 0;
                    if (mp4_ReconstructCoeffsIntraMB(pInfo, j, pat, quant, dcVLC, ac_pred_flag, pMBinfoMT->dctCoeffs, pMBinfoMT->lnz) != MP4_STATUS_OK) {
                        mp4_Error("Error when decode coefficients of Intra block");
                        return MP4_STATUS_ERROR;
                    }
                    mp4_Zero4MV(pMBinfo->mv);
                } else {
                    mp4_UpdateIntraPredBuffInvalid(pInfo, j);
                    if (!mcsel) {
                        if (!field_prediction) {
                            if (mb_type != IPPVC_MBTYPE_INTER4V) {
                                if (mp4_PredictDecode1MV(pInfo, pMBinfo, curRow, j) != MP4_STATUS_OK) {
                                    mp4_Error("Error when decode motion vector");
                                    return MP4_STATUS_ERROR;
                                }
                                pMBinfo->mv[1] = pMBinfo->mv[2] = pMBinfo->mv[3] = pMBinfo->mv[0];
                            } else {
                                if (mp4_PredictDecode4MV(pInfo, pMBinfo, curRow, j) != MP4_STATUS_OK) {
                                    mp4_Error("Error when decode motion vector");
                                    return MP4_STATUS_ERROR;
                                }
                            }
                        } else {
                            if (mp4_PredictDecodeFMV(pInfo, pMBinfo, curRow, j, &pMVField[0], &pMVField[1]) != MP4_STATUS_OK) {
                                mp4_Error("Error when decode motion vector");
                                return MP4_STATUS_ERROR;
                            }
                        }
                    } else {
                        ippiCalcGlobalMV_MPEG4(j << 4, curRow << 4, pMBinfo->mv, pInfo->VisualObject.VideoObject.WarpSpec);
                        pMBinfo->mv[1] = pMBinfo->mv[2] = pMBinfo->mv[3] = pMBinfo->mv[0];
                    }
                    mp4_ReconstructCoeffsInterMB(pInfo, pMBinfoMT->dctCoeffs, pMBinfoMT->lnz, pat, 0, scan, quant);
                }
            } else {
                mp4_UpdateIntraPredBuffInvalid(pInfo, j);
                mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_NOTCODED);
                mp4_Zero4MV(pMBinfo->mv);
                field_prediction = 0;
                mcsel = 1;
                pat = 0;
                ippiCalcGlobalMV_MPEG4(j << 4, curRow << 4, pMBinfo->mv, pInfo->VisualObject.VideoObject.WarpSpec);
                pMBinfo->mv[1] = pMBinfo->mv[2] = pMBinfo->mv[3] = pMBinfo->mv[0];
            }
            mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB);
            pMBinfo->not_coded = 0;  // for B-VOP all MB have MVs
            pMBinfo->type = (Ipp8u)(mcsel ? IPPVC_MBTYPE_INTRA : mb_type);  // for OBMC MVs
            pMBinfoMT->mcsel = (Ipp8u)mcsel;
            pMBinfoMT->pat = (Ipp8u)pat;
            if (interlaced) {
                pMBinfoMT->dct_type = (Ipp8u)dct_type;
                pMBinfo->field_info = (Ipp8u)(field_prediction + (mb_ftfr << 1) + (mb_fbfr << 2));
                pMVField += 2;
            }
            pMBinfo ++;
            pMBinfoMT ++;
            j ++;
        }
        if (!pInfo->VisualObject.VideoObject.resync_marker_disable) {
            int  found;
            if (mp4_DecodeVideoPacket(pInfo, &quant, &found) == MP4_STATUS_OK) {
                if (found) {
                    // reset Intra prediction buffer on new Video_packet
                    mp4_ResetIntraPredBuffer(pInfo);
                    // mark MBs the previous videopacket as invalid for prediction
                    for (i = 1; i <= (curRow == 0 ? j : mbPerRow + 1); i ++) {
                        pMBinfo[-i].validPred = 0;
                    }
                }
            } else
                return MP4_STATUS_ERROR;
        }
    }
    pInfo->VisualObject.VideoObject.VideoObjectPlane.quant = quant;
    return MP4_STATUS_OK;
}


static void mp4_DecodeVOP_S_ReconSlice(mp4_Info* pInfo, int curRow, mp4_MacroBlockMT* pMBinfoMT)
{
    int             j, dx, dy, mbPerRow, pYoff23;
    int             stepYr, stepYc, stepCbr, stepCbc, stepCrr, stepCrc, stepFc[6], stepY;
    Ipp8u           *pYc, *pCbc, *pCrc, *pYr, *pCbr, *pCrr, *pFc[6];
    int             mb_not_coded, mb_type, pat, scan, obmc_disable, rt, quarter_sample;
    int             interlaced, field_prediction, dct_type, mb_ftfr, mb_fbfr;
    IppiRect        limitRectL, limitRectC;
    mp4_MacroBlock *pMBinfo;
    IppMotionVector mvCur[4], mvCbCr, mvCbCrT, mvCbCrB, *pMVField, mvTmpT, mvTmpB;
    Ipp16s*         coeffMB;

    mbPerRow = pInfo->VisualObject.VideoObject.MacroBlockPerRow;
    stepYc = pInfo->VisualObject.cFrame.stepY;
    stepYr = pInfo->VisualObject.rFrame.stepY;
    stepCbc = pInfo->VisualObject.cFrame.stepCb;
    stepCbr = pInfo->VisualObject.rFrame.stepCb;
    stepCrc = pInfo->VisualObject.cFrame.stepCr;
    stepCrr = pInfo->VisualObject.rFrame.stepCr;
    pYc = pInfo->VisualObject.cFrame.pY   + curRow * 16 * stepYc;
    pCbc = pInfo->VisualObject.cFrame.pCb + curRow * 8 * stepCbc;
    pCrc = pInfo->VisualObject.cFrame.pCr + curRow * 8 * stepCrc;
    pYr = pInfo->VisualObject.rFrame.pY   + curRow * 16 * stepYr;
    pCbr = pInfo->VisualObject.rFrame.pCb + curRow * 8 * stepCbr;
    pCrr = pInfo->VisualObject.rFrame.pCr + curRow * 8 * stepCrr;
    dy = curRow * 16;
    dx = 0;
    stepFc[0] = stepFc[1] = stepFc[2] = stepFc[3] = stepYc; stepFc[4] = stepCbc; stepFc[5] = stepCrc;
    // Bounding rectangle for MV limitation
    limitRectL.x = - 16;
    limitRectL.y = - 16;
    limitRectL.width = pInfo->VisualObject.VideoObject.width + 32;
    limitRectL.height = pInfo->VisualObject.VideoObject.height + 32;
    pMBinfo = pInfo->VisualObject.VideoObject.MBinfo + curRow * mbPerRow;
    rt = pInfo->VisualObject.VideoObject.VideoObjectPlane.rounding_type;
    quarter_sample = pInfo->VisualObject.VideoObject.quarter_sample;
    obmc_disable = pInfo->VisualObject.VideoObject.obmc_disable;
    scan = pInfo->VisualObject.VideoObject.VideoObjectPlane.alternate_vertical_scan_flag ? IPPVC_SCAN_VERTICAL : IPPVC_SCAN_ZIGZAG;
    // Bounding rectangles for MV limitation
    limitRectC.x = -8;
    limitRectC.y = -8;
    limitRectC.width = (pInfo->VisualObject.VideoObject.width >> 1) + 16;
    limitRectC.height = (pInfo->VisualObject.VideoObject.height >> 1) + 16;
    interlaced = pInfo->VisualObject.VideoObject.interlaced;
    pMVField = interlaced ? pInfo->VisualObject.VideoObject.FieldMV + curRow * mbPerRow * 2 : 0;
    // init for non-interlaced
    stepY = stepYc;
    pYoff23 = 8 * stepYc;
    field_prediction = dct_type = mb_ftfr = mb_fbfr = 0;
    // warning "variable may be used without having been initialized"
    mvCbCr.dx = mvCbCr.dy = mvCbCrT.dx = mvCbCrT.dy = mvCbCrB.dx = mvCbCrB.dy = 0;
    for (j = 0; j < mbPerRow; j ++) {
        mb_not_coded = pMBinfo->not_coded;
        mb_type = pMBinfo->type;
        coeffMB = pMBinfoMT->dctCoeffs;
        if (pMBinfoMT->mcsel) {
            IppiRect  mbRect;
            mbRect.x = dx;  mbRect.y = dy;  mbRect.width = mbRect.height = 16;
            ippiWarpLuma_MPEG4_8u_C1R(pInfo->VisualObject.rFrame.pY, stepYr, pYc, stepYc, &mbRect, pInfo->VisualObject.VideoObject.WarpSpec);
            mbRect.x >>= 1;  mbRect.y >>= 1;  mbRect.width = mbRect.height = 8;
            ippiWarpChroma_MPEG4_8u_P2R(pInfo->VisualObject.rFrame.pCb, stepCbr, pInfo->VisualObject.rFrame.pCr, stepCrr, pCbc, stepCbc, pCrc, stepCrc, &mbRect, pInfo->VisualObject.VideoObject.WarpSpec);
            pat = pMBinfoMT->pat;
            if (interlaced)
                dct_type = pMBinfoMT->dct_type;
            if (pat) {
                mp4_DCTInvCoeffsInterMB(pInfo, coeffMB, pMBinfoMT->lnz, pat, scan);
                if (!dct_type) {
                    mp4_AddResidual(pat & 32, pYc, stepYc, coeffMB);
                    mp4_AddResidual(pat & 16, pYc+8, stepYc, coeffMB+64);
                    mp4_AddResidual(pat & 8, pYc+stepYc*8, stepYc, coeffMB+128);
                    mp4_AddResidual(pat & 4, pYc+stepYc*8+8, stepYc, coeffMB+192);
                } else {
                    mp4_AddResidual(pat & 32, pYc, stepYc*2, coeffMB);
                    mp4_AddResidual(pat & 16, pYc+8, stepYc*2, coeffMB+64);
                    mp4_AddResidual(pat & 8, pYc+stepYc, stepYc*2, coeffMB+128);
                    mp4_AddResidual(pat & 4, pYc+stepYc+8, stepYc*2, coeffMB+192);
                }
                mp4_AddResidual(pat & 2, pCbc, stepCbc, coeffMB+256);
                mp4_AddResidual(pat & 1, pCrc, stepCrc, coeffMB+320);
            }
        } else if (mb_type >= IPPVC_MBTYPE_INTRA) {
            if (interlaced) {
                if (pMBinfoMT->dct_type) {
                    stepY = stepYc * 2;
                    pYoff23 = stepYc;
                } else {
                    stepY = stepYc;
                    pYoff23 = 8 * stepYc;
                }
                stepFc[0] = stepFc[1] = stepFc[2] = stepFc[3] = stepY;
            }
            pFc[0] = pYc; pFc[1] = pYc + 8; pFc[2] = pYc + pYoff23; pFc[3] = pYc + pYoff23 + 8; pFc[4] = pCbc; pFc[5] = pCrc;
            mp4_DCTInvCoeffsIntraMB(coeffMB, pMBinfoMT->lnz, pFc, stepFc);
        } else  {
            if (mb_not_coded && obmc_disable) {
                ippiCopy16x16_8u_C1R(pYr, stepYr, pYc, stepYc);
                ippiCopy8x8_8u_C1R(pCbr, stepCbr, pCbc, stepCbc);
                ippiCopy8x8_8u_C1R(pCrr, stepCrr, pCrc, stepCrc);
            } else {
                pat = pMBinfoMT->pat;
                if (interlaced) {
                    field_prediction = pMBinfo->field_info & 1;
                    mb_ftfr = (pMBinfo->field_info >> 1) & 1;
                    mb_fbfr = (pMBinfo->field_info >> 2) & 1;
                    dct_type = pMBinfoMT->dct_type;
                }
                if (!mb_not_coded) {
                    if (!(interlaced && field_prediction)) {
                        if (mb_type != IPPVC_MBTYPE_INTER4V) {
                            if (quarter_sample) {
                                mp4_LimitMVQ(pMBinfo->mv, mvCur, &limitRectL, dx, dy, 16);
                                mp4_ComputeChromaMVQ(mvCur, &mvCbCr);
                            } else {
                                mp4_LimitMV(pMBinfo->mv, mvCur, &limitRectL, dx, dy, 16);
                                mp4_ComputeChromaMV(mvCur, &mvCbCr);
                            }
                            mvCur[1] = mvCur[2] = mvCur[3] = mvCur[0];