mp4decvopp.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.

            }
        }
    }
// decode usual P-VOP
    {
        for (;;) {
            // reset Intra prediction buffer on new Video_packet
            mp4_ResetIntraPredBuffer(pInfo);
            mbInVideoPacket = 0;
            // decode blocks
            for (;;) {
                if (colNum == 0) {
                    // reset B-prediction blocks on new row
                    mp4_ResetIntraPredBblock(pInfo);
                }
                mb_not_coded = mp4_GetBit(pInfo);
                mb_type = IPPVC_MBTYPE_INTER;
                if (!mb_not_coded)
                    if (mp4_DecodeMCBPC_P(pInfo, &mb_type, &cbpc, 1) != MP4_STATUS_OK)
                        return MP4_STATUS_ERROR;
                if (mb_type != IPPVC_MB_STUFFING) {
                    if (!mb_not_coded) {
                        if (mb_type >= IPPVC_MBTYPE_INTRA)
                            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);
                    } else {
                        mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_NOTCODED);
                        mp4_Zero4MV(pMBinfo->mv);
                    }
                    pMBinfo->validPred = 1;
                    pMBinfo->not_coded = (Ipp8u)mb_not_coded;
                    pMBinfo->type = (Ipp8u)mb_type;
                    if (mb_type >= IPPVC_MBTYPE_INTRA) {
                        if (mbCurr == 0)
                            quantPred = quant;
                        dcVLC = (quantPred < mp4_DC_vlc_Threshold[pInfo->VisualObject.VideoObject.VideoObjectPlane.intra_dc_vlc_thr]) ? 1 : 0;
                        pFc[0] = pYc; pFc[1] = pYc + 8; pFc[2] = pYc + 8 * stepYc; pFc[3] = pYc + 8 * stepYc + 8; pFc[4] = pCbc; pFc[5] = pCrc;
                        if (mp4_DecodeIntraMB(pInfo, colNum, (cbpy << 2) + cbpc, quant, dcVLC, ac_pred_flag, pFc, stepFc) != MP4_STATUS_OK) {
                            mp4_Error("Error when decode coefficients of Intra block");
                            return MP4_STATUS_ERROR;
                        }
                        mp4_Zero4MV(pMBinfo->mv);
                    } else {
                        mp4_UpdateIntraPredBuffInvalid(pInfo, colNum);
                        if (!mb_not_coded) {
                            dx = colNum * 16;
                            dy = rowNum * 16;
                            if (mb_type != IPPVC_MBTYPE_INTER4V) {
                                if (mp4_PredictDecode1MV(pInfo, pMBinfo, rowNum, colNum) != 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];
                                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];
                            } else {
                                if (mp4_PredictDecode4MV(pInfo, pMBinfo, rowNum, colNum) != MP4_STATUS_OK) {
                                    mp4_Error("Error when decode motion vector");
                                    return MP4_STATUS_ERROR;
                                }
                                if (quarter_sample) {
                                    mp4_Limit4MVQ(pMBinfo->mv, mvCur, &limitRectL, dx, dy, 8);
                                    mp4_ComputeChroma4MVQ(pMBinfo->mv, &mvCbCr);
                                } else {
                                    mp4_Limit4MV(pMBinfo->mv, mvCur, &limitRectL, dx, dy, 8);
                                    mp4_ComputeChroma4MV(pMBinfo->mv, &mvCbCr);
                                }
                                mp4_LimitMV(&mvCbCr, &mvCbCr, &limitRectC, dx >> 1, dy >> 1, 8);
                            }
                        }
                        if (obmc_disable) {
                            if (mb_not_coded) {
                                ippiCopy16x16_8u_C1R(pYr, stepYr, pYc, stepYc);
                                ippiCopy8x8_8u_C1R(pCbr, stepCbr, pCbc, stepCbc);
                                ippiCopy8x8_8u_C1R(pCrr, stepCrr, pCrc, stepCrc);
                            } else {
                                if (quarter_sample) {
                                    if (mb_type == IPPVC_MBTYPE_INTER4V) {
                                        mp4_Copy8x8QP_8u(pYr, stepYr, pYc, stepYc, &mvCur[0], rt);
                                        mp4_Copy8x8QP_8u(pYr+8, stepYr, pYc+8, stepYc, &mvCur[1], rt);
                                        mp4_Copy8x8QP_8u(pYr+8*stepYr, stepYr, pYc+8*stepYc, stepYc, &mvCur[2], rt);
                                        mp4_Copy8x8QP_8u(pYr+8*stepYr+8, stepYr, pYc+8*stepYc+8, stepYc, &mvCur[3], rt);
                                    } else
                                        mp4_Copy16x16QP_8u(pYr, stepYr, pYc, stepYc, &mvCur[0], rt);
                                    mp4_DecodeReconBlockInter_MPEG4(cbpy & 8, pYc, stepYc);
                                    mp4_DecodeReconBlockInter_MPEG4(cbpy & 4, pYc+8, stepYc);
                                    mp4_DecodeReconBlockInter_MPEG4(cbpy & 2, pYc+8*stepYc, stepYc);
                                    mp4_DecodeReconBlockInter_MPEG4(cbpy & 1, pYc+8*stepYc+8, stepYc);
                                } else {
                                    if (cbpy || mb_type == IPPVC_MBTYPE_INTER4V) {
                                        mp4_DecodeMCBlockInter_MPEG4(cbpy & 8, pYr, stepYr, pYc, stepYc, mvCur[0], rt);
                                        mp4_DecodeMCBlockInter_MPEG4(cbpy & 4, pYr+8, stepYr, pYc+8, stepYc, mvCur[1], rt);
                                        mp4_DecodeMCBlockInter_MPEG4(cbpy & 2, pYr+8*stepYr, stepYr, pYc+8*stepYc, stepYc, mvCur[2], rt);
                                        mp4_DecodeMCBlockInter_MPEG4(cbpy & 1, pYr+8*stepYr+8, stepYr, pYc+8*stepYc+8, stepYc, mvCur[3], rt);
                                    } else {
                                        mp4_Copy16x16HP_8u(pYr, stepYr, pYc, stepYc, &mvCur[0], rt);
                                        mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nB_INTER_NC);
                                        mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nB_INTER_NC);
                                        mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nB_INTER_NC);
                                        mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nB_INTER_NC);
                                        //if (cbpy) {
                                        //    mp4_DecodeReconBlockInter_MPEG4(cbpy & 8, pYc, stepYc);
                                        //    mp4_DecodeReconBlockInter_MPEG4(cbpy & 4, pYc+8, stepYc);
                                        //    mp4_DecodeReconBlockInter_MPEG4(cbpy & 2, pYc+8*stepYc, stepYc);
                                        //    mp4_DecodeReconBlockInter_MPEG4(cbpy & 1, pYc+8*stepYc+8, stepYc);
                                        //}
                                    }
                                }
                                mp4_DecodeMCBlockInter_MPEG4(cbpc & 2, pCbr, stepCbr, pCbc, stepCbc, mvCbCr, rt);
                                mp4_DecodeMCBlockInter_MPEG4(cbpc & 1, pCrr, stepCrr, pCrc, stepCrc, mvCbCr, rt);
                            }
                        }
                    }
                    if (!obmc_disable) {
                        // OBMC for previous MB
                        if (colNum > 0)
                            if (pMBinfo[-1].type < IPPVC_MBTYPE_INTRA)
                                mp4_OBMC(pInfo, pMBinfo - 1, mvPrev, colNum - 1, rowNum, limitRectL, pYc - 16, stepYc, pYr - 16, stepYr, cbpyPrev, coeffMB, 0);
                        if (mb_type < IPPVC_MBTYPE_INTRA) {
                            if (mb_not_coded) {
                                cbpyPrev = 0;
                                mp4_Zero4MV(mvPrev);
                                ippiCopy8x8_8u_C1R(pCbr, stepCbr, pCbc, stepCbc);
                                ippiCopy8x8_8u_C1R(pCrr, stepCrr, pCrc, stepCrc);
                            } else {
                                cbpyPrev = cbpy;
                                mvPrev[0] = mvCur[0]; mvPrev[1] = mvCur[1]; mvPrev[2] = mvCur[2]; mvPrev[3] = mvCur[3];
                                if (mp4_DecodeInterMB(pInfo, coeffMB, quant, (cbpy << 2) + cbpc, scan) != MP4_STATUS_OK) {
                                    mp4_Error("Error when decode coefficients of Inter block");
                                    return MP4_STATUS_ERROR;
                                }
                                mp4_MC_HP(cbpc & 2, pCbr, stepCbr, pCbc, stepCbc, coeffMB+256, &mvCbCr, rt);
                                mp4_MC_HP(cbpc & 1, pCrr, stepCrr, pCrc, stepCrc, coeffMB+320, &mvCbCr, rt);
                            }
                            // OBMC current MB if it is the last in the row
                            if (colNum == mbPerRow - 1)
                                mp4_OBMC(pInfo, pMBinfo, mvPrev, colNum, rowNum, limitRectL, pYc, stepYc, pYr, stepYr, cbpyPrev, coeffMB, 0);
                        }
                    }
                    mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB);
                    mbCurr ++;
                    if (mbCurr == nmb) {
                        // skip stuffing
                        while (mp4_ShowBits(pInfo, 10) == 1)
                            mp4_FlushBits(pInfo, 10);
                        return MP4_STATUS_OK;
                    }
                    pMBinfo ++;
                    mbInVideoPacket ++;
                    colNum ++;
                    if (colNum == mbPerRow) {
                        colNum = 0;
                        rowNum ++;
                        pYc += 3 * MP4_NUM_EXT_MB * 16 + (stepYc << 4) - stepYc;
                        pCbc += 3 * MP4_NUM_EXT_MB * 8 + (stepCbc << 3) - stepCbc;
                        pCrc += 3 * MP4_NUM_EXT_MB * 8 + (stepCrc << 3) - stepCrc;
                        pYr += 3 * MP4_NUM_EXT_MB * 16 + (stepYr << 4) - stepYr;
                        pCbr += 3 * MP4_NUM_EXT_MB * 8 + (stepCbr << 3) - stepCbr;
                        pCrr += 3 * MP4_NUM_EXT_MB * 8 + (stepCrr << 3) - stepCrr;
                    } else {
                        pYc += 16; pCrc += 8; pCbc += 8;
                        pYr += 16; pCrr += 8; pCbr += 8;
                    }
                }
                if (!pInfo->VisualObject.VideoObject.resync_marker_disable) {
                    int  found;
                    if (mp4_DecodeVideoPacket(pInfo, &quant, &found) == MP4_STATUS_OK) {
                        if (found)
                            break;
                    } else
                        return MP4_STATUS_ERROR;
                }
            }
            // mark MBs the previous videopacket as invalid for prediction
            for (i = 1; i <= IPP_MIN(mbInVideoPacket, mbPerRow + 1); i ++) {
                pMBinfo[-i].validPred = 0;
            }
        }
    }
}



#ifdef _OMP_KARABAS

static mp4_Status mp4_DecodeVOP_P_DecodeSlice(mp4_Info* pInfo, int curRow, mp4_MacroBlockMT* pMBinfoMT)
{
    int              mb_not_coded, mb_type, cbpc, cbpy, quant, quantPred, ac_pred_flag, dcVLC;
    int              i, j, mbPerRow, scan, pat;
    mp4_MacroBlock  *pMBinfo;
    int              interlaced, field_prediction, dct_type, mb_ftfr, mb_fbfr;
    IppMotionVector *pMVField;

    mbPerRow = pInfo->VisualObject.VideoObject.MacroBlockPerRow;
    pMBinfo = pInfo->VisualObject.VideoObject.MBinfo + curRow * mbPerRow;
    // warning "variable may be used without having been initialized"
    cbpc = mb_type = ac_pred_flag = 0;
    if (pInfo->VisualObject.VideoObject.short_video_header) {
        quant = pInfo->VisualObject.VideoObject.VideoObjectPlaneH263.vop_quant;
        for (j = 0; j < mbPerRow; j ++) {
            do {
                mb_not_coded = mp4_GetBit(pInfo);
                if (mb_not_coded)
                    break;
                if (mp4_DecodeMCBPC_P(pInfo, &mb_type, &cbpc, 1) != MP4_STATUS_OK)
                    return MP4_STATUS_ERROR;
            } while (mb_type == IPPVC_MB_STUFFING);
            pMBinfo->not_coded = (Ipp8u)mb_not_coded;
            if (mb_not_coded) {
                pMBinfo->mv[0].dx = pMBinfo->mv[0].dy = 0;
                mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_NOTCODED);
            } else {
                pMBinfo->type = (Ipp8u)mb_type;
                if (mb_type == IPPVC_MBTYPE_INTER4V || mb_type == IPPVC_MBTYPE_INTER4V_Q) {
                    mp4_Error("Error in MacroblockType. 4MV shall not be used for short_video_header");
                    return MP4_STATUS_ERROR;