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.

                                return MP4_STATUS_ERROR;
                            }
                            pMBinfo->mv[1] = pMBinfo->mv[2] = pMBinfo->mv[3] = pMBinfo->mv[0];
                        } else {
                            if (mp4_PredictDecode4MV(pInfo, pMBinfo, y, x) != MP4_STATUS_OK) {
                                mp4_Error("Error when decode motion vector");
                                return MP4_STATUS_ERROR;
                            }
                        }
                    } else {
                        mp4_Zero4MV(pMBinfo->mv);
                    }
                    pMBinfo->not_coded = (Ipp8u)mb_not_coded;
                    pMBinfo->type = (Ipp8u)mb_type;
                    pMBinfo ++;
                    pMBdp->pat = (Ipp8u)cbpc;
                    pMBdp ++;
                    mbInVideoPacket ++;
                    x ++;
                    if (x == mbPerRow) {
                        x = 0;
                        y ++;
                    }
                }
                if (mp4_ShowBits(pInfo, 17) == MP4_MV_MARKER) {
                    mp4_GetBits(pInfo, 17);
                    break;
                }
            }
            pMBdp = &pInfo->VisualObject.VideoObject.DataPartBuff[mbCurr];
            pMBinfo = &pInfo->VisualObject.VideoObject.MBinfo[mbCurr];
            // decode ac_pred_flag/cbpy/dquant/IntraDC part
            for (i = 0; i < mbInVideoPacket; i ++) {
                if (!pMBinfo->not_coded) {
                    mb_type = pMBinfo->type;
                    if (mb_type >= IPPVC_MBTYPE_INTRA)
                        pMBdp->ac_pred_flag = (Ipp8u)mp4_GetBit(pInfo);
                    if (mp4_DecodeCBPY_P(pInfo, &cbpy, mb_type) != MP4_STATUS_OK)
                        return MP4_STATUS_ERROR;
                    pMBdp->pat = (Ipp8u)((cbpy << 2) + pMBdp->pat);
                    quantPred = quant;
                    if (mb_type == IPPVC_MBTYPE_INTER_Q || mb_type == IPPVC_MBTYPE_INTRA_Q)
                        mp4_UpdateQuant(pInfo, quant);
                    pMBdp->quant = (Ipp8u)quant;
                    if (i == 0)
                        quantPred = quant;
                    // decode DC coefficient of Intra blocks
                    dcVLC = (quantPred < mp4_DC_vlc_Threshold[pInfo->VisualObject.VideoObject.VideoObjectPlane.intra_dc_vlc_thr]) ? 1 : 0;
                    if ((mb_type >= IPPVC_MBTYPE_INTRA) && dcVLC) {
                        for (j = 0; j < 6; j ++) {
                            if (ippiDecodeDCIntra_MPEG4_1u16s(&pInfo->bufptr, &pInfo->bitoff, &pMBdp->dct_dc[j], j < 4 ? IPPVC_BLOCK_LUMA : IPPVC_BLOCK_CHROMA) != ippStsNoErr) {
                                mp4_Error("Error when decode coefficients of Intra block");
                                return MP4_STATUS_ERROR;
                            }
                        }
                    }
                }
                pMBdp ++;
                pMBinfo ++;
            }
            if (mbCurr + mbInVideoPacket < nmb)
                pMBinfo->type = IPPVC_MBTYPE_INTRA;  // for OBMC set first MB of the next videopacket as invalid for right MV
            pMBdp = &pInfo->VisualObject.VideoObject.DataPartBuff[mbCurr];
            pMBinfo = &pInfo->VisualObject.VideoObject.MBinfo[mbCurr];
            // decode coeffs and reconstruct macroblocks
            for (i = 0; i < mbInVideoPacket; i ++) {
                if (colNum == 0) {
                    // reset B-prediction blocks on new row
                    mp4_ResetIntraPredBblock(pInfo);
                }
                quant = pMBdp->quant;
                mb_type = pMBinfo->type;
                if (mb_type >= IPPVC_MBTYPE_INTRA) {
                    quantPred = (i == 0) ? quant : pMBdp[-1].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_DP(pInfo, pMBdp->dct_dc, colNum, pMBdp->pat, quant, dcVLC, pMBdp->ac_pred_flag, pFc, stepFc) != MP4_STATUS_OK) {
                        mp4_Error("Error when decode coefficients of Intra block");
                        return MP4_STATUS_ERROR;
                    }
                } else {
                    mp4_UpdateIntraPredBuffInvalid(pInfo, colNum);
                    mb_not_coded = pMBinfo->not_coded;
                    if (!mb_not_coded) {
                        dx = colNum * 16;
                        dy = rowNum * 16;
                        cbpy = pMBdp->pat >> 2;
                        cbpc = pMBdp->pat & 3;
                        if (mb_type == IPPVC_MBTYPE_INTER4V) {
                            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);
                        } else {
                            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];
                        }
                    }
                    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);
                                }
                            }
                            mp4_DecodeMCBlockInter_MPEG4(cbpc & 2, pCbr, stepCbr, pCbc, stepCbc, mvCbCr, rt);
                            mp4_DecodeMCBlockInter_MPEG4(cbpc & 1, pCrr, stepCrr, pCrc, stepCrc, mvCbCr, rt);
                        }
                    } else {
                        if (mb_not_coded) {
                            cbpy = 0;
                            mp4_Zero4MV(mvCur);
                            ippiCopy8x8_8u_C1R(pCbr, stepCbr, pCbc, stepCbc);
                            ippiCopy8x8_8u_C1R(pCrr, stepCrr, pCrc, stepCrc);
                        } else {
                            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);
                        }
                        mp4_OBMC(pInfo, pMBinfo, mvCur, colNum, rowNum, limitRectL, pYc, stepYc, pYr, stepYr, cbpy, coeffMB, 0);
                    }
                }
                mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB);
                pMBinfo ++;
                pMBdp ++;
                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;
                }
            }
            mbCurr += mbInVideoPacket;
            if (mbCurr == nmb)
                break;
            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;
        }
        return MP4_STATUS_OK;
    }
// decode interlaced P-VOP
    if (pInfo->VisualObject.VideoObject.interlaced) {
        int             stepY, pYoff23, field_prediction, dct_type, dct_typePrev, mb_ftfr, mb_fbfr;
        IppMotionVector mvCbCrT, mvCbCrB, *mvField = pInfo->VisualObject.VideoObject.FieldMV;

        // warning "variable may be used without having been initialized"
        dct_type = dct_typePrev = mb_ftfr = mb_fbfr = 0;
        mvCbCrT.dx = mvCbCrT.dy = mvCbCrB.dx = mvCbCrB.dy = 0;
        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;