umc_h264_dec_reconstruct_mb_fld.cpp

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.

                    // when 3,3 filter is selected. Now clip mvx and mvy
                    // rather than xint and yint to avoid clipping again for
                    // chroma.
                    Ipp8u pred_method=SelectPredictionMethod(
                        mbYOffset+ypos,
                        mvy,
                        sbheight,
                        height/2);
                    mvx = MIN(mvx, (width - ((Ipp32s)mbXOffset + xpos + sbwidth -
                        1 - D_MV_CLIP_LIMIT))*INTERP_FACTOR);
                    mvx = MAX(mvx, -((Ipp32s)(mbXOffset + xpos + D_MV_CLIP_LIMIT)*INTERP_FACTOR));
                    mvy = MIN(mvy, (height/2 - ((Ipp32s)mbYOffset + ypos + sbheight -
                        1 - D_MV_CLIP_LIMIT))*INTERP_FACTOR);
                    mvy = MAX(mvy, -((Ipp32s)(mbYOffset + ypos + D_MV_CLIP_LIMIT)*INTERP_FACTOR));
                    mvyc = mvy;

                    if(!m_pCurrentFrame->m_bottom_field_flag[m_field_index]
                    && RefFieldTop)
                    {
                        mvyc = mvy - 2;
                    }
                    else
                    {
                        if(m_pCurrentFrame->m_bottom_field_flag[m_field_index]
                        && !RefFieldTop)
                        {
                            mvyc = mvy + 2;
                        }
                    }

                    xint = mvx >> INTERP_SHIFT;
                    yint = mvy >> INTERP_SHIFT;



                    switch(pred_method)
                    {
                    case ALLOK:
                        pRef = pRefY_sb + offsetY + xint + yint * pitch;

                        ippiInterpolateLuma_H264_8u_C1R(pRef, pitch,
                                                        pDstY_sb, pitch,
                                                        xh, yh, roi);

                        break;
                    case PREDICTION_FROM_TOP:
                        pRef = pRefY_sb + offsetY + xint + yint * pitch;

                        InterpolateLumaTop(pRef, pitch,
                            pDstY_sb, pitch,
                            xh, yh, - ((Ipp32s)mbYOffset+ypos+yint),roi);

                        break;
                    case PREDICTION_FROM_BOTTOM:
                        pRef = pRefY_sb + offsetY + xint + yint * pitch;

                        InterpolateLumaBottom(pRef, pitch,
                            pDstY_sb, pitch,
                            xh, yh, ((Ipp32s)mbYOffset+ypos+yint+roi.height)-height/2,roi);
                        break;
                    default:VM_ASSERT(0);
                        break;
                    }
                    // optional prediction weighting
                    if (bUnidirWeightSB &&
                        pPredWeight[uBlockDir][*pRefIndex].luma_weight_flag != 0)
                    {
                        UniDirWeightBlock(pDstY_sb, pitch, sbwidth, sbheight,
                                            luma_log2_weight_denom,
                                            pPredWeight[uBlockDir][*pRefIndex].luma_weight,
                                            pPredWeight[uBlockDir][*pRefIndex].luma_offset);
                    }
                    if (color_format==1)
                    {
                        pred_method=SelectPredictionMethod(
                            mbYOffset+ypos,
                            mvyc,
                            sbheight,
                            height/2);
                        // chroma (1/8 pixel MV)
                        xh = mvx & (INTERP_FACTOR*2-1);
                        yh = mvyc & (INTERP_FACTOR*2-1);
                        xint = mvx >> (INTERP_SHIFT+1);
                        yint = mvyc >> (INTERP_SHIFT+1);

                        switch(pred_method)
                        {
                        case ALLOK:
                            pRef = pRefV_sb + (offsetY>>1) + xint + yint * pitch;

                            ippiInterpolateChroma_H264_8u_C1R(pRef, pitch,
                                                                pDstV_sb, pitch,
                                                                xh, yh,   roi_cr);

                            pRef = pRefU_sb + (offsetY>>1) + xint + yint * pitch;

                            ippiInterpolateChroma_H264_8u_C1R(pRef, pitch,
                                                                pDstU_sb, pitch,
                                                                xh, yh,   roi_cr);
                            break;

                        case PREDICTION_FROM_TOP:
                            pRef = pRefV_sb + (offsetY>>1) + xint + yint * pitch;


                            InterpolateChromaTop(pRef, pitch,
                                pDstV_sb, pitch,
                                xh, yh,  - (((Ipp32s)mbYOffset+ypos)/2+yint), roi_cr);


                            pRef = pRefU_sb + (offsetY>>1) + xint + yint * pitch;

                            InterpolateChromaTop(pRef, pitch,
                                pDstU_sb, pitch,
                                xh, yh,  - (((Ipp32s)mbYOffset+ypos)/2+yint), roi_cr);

                            break;
                        case PREDICTION_FROM_BOTTOM:
                            pRef = pRefV_sb + (offsetY>>1) + xint + yint * pitch;

                            InterpolateChromaBottom(pRef, pitch,
                                pDstV_sb, pitch,
                                xh, yh,   (((Ipp32s)mbYOffset+ypos)/2+yint+roi_cr.height)-height/4,roi_cr);

                            pRef = pRefU_sb + (offsetY>>1) + xint + yint * pitch;

                            InterpolateChromaBottom(pRef, pitch,
                                pDstU_sb, pitch,
                                xh, yh,   (((Ipp32s)mbYOffset+ypos)/2+yint+roi_cr.height)-height/4,roi_cr);
                            break;
                        default:VM_ASSERT(0);
                            break;
                        }

                        // optional prediction weighting
                        if (bUnidirWeightSB &&
                            pPredWeight[uBlockDir][*pRefIndex].chroma_weight_flag != 0)
                        {
                            UniDirWeightBlock(pDstV_sb, pitch, sbwidth>>1, sbheight>>1,
                                                chroma_log2_weight_denom,
                                                pPredWeight[uBlockDir][*pRefIndex].chroma_weight[1],
                                                pPredWeight[uBlockDir][*pRefIndex].chroma_offset[1]);
                            UniDirWeightBlock(pDstU_sb, pitch, sbwidth>>1, sbheight>>1,
                                                chroma_log2_weight_denom,
                                                pPredWeight[uBlockDir][*pRefIndex].chroma_weight[0],
                                                pPredWeight[uBlockDir][*pRefIndex].chroma_offset[0]);

                        }
                    }

                }    // loopCnt
                if (loopCnt > 1)
                {
                    if (!bBidirWeightMB)
                    {
                        // combine bidir predictions into one, no weighting
                        // luma
                        ippiInterpolateBlock_H264_8u_P2P1R(pDstY_sb-16, pDstY_sb, pDstY_sb-16,
                            roi.width,
                            roi.height,
                            pitch);
                        if (color_format==1)
                        {
                            ippiInterpolateBlock_H264_8u_P2P1R(pDstV_sb-8, pDstV_sb, pDstV_sb-8,
                                roi_cr.width,
                                roi_cr.height,
                                pitch);
                            ippiInterpolateBlock_H264_8u_P2P1R(pDstU_sb-8, pDstU_sb, pDstU_sb-8,
                                roi_cr.width,
                                roi_cr.height,
                                pitch);
                        }

                    }
                    else
                    {
                        // combine bidir predictions into one with weighting
                        if (weighted_bipred_idc == 1)
                        {
                            // combine bidir predictions into one, explicit weighting

                            // luma
                            BiDirWeightBlock(pDstY_sb-16, pDstY_sb, pDstY_sb-16,
                                                pitch, sbwidth, sbheight,
                                                luma_log2_weight_denom,
                                                pPredWeight[0][RefIndexL0].luma_weight,
                                                pPredWeight[0][RefIndexL0].luma_offset,
                                                pPredWeight[1][RefIndexL1].luma_weight,
                                                pPredWeight[1][RefIndexL1].luma_offset);
                            if (color_format==1)
                            {
                                // chroma
                                BiDirWeightBlock(pDstV_sb-8, pDstV_sb, pDstV_sb-8,
                                                    pitch, sbwidth>>1, sbheight>>1,
                                                    chroma_log2_weight_denom,
                                                    pPredWeight[0][RefIndexL0].chroma_weight[1],
                                                    pPredWeight[0][RefIndexL0].chroma_offset[1],
                                                    pPredWeight[1][RefIndexL1].chroma_weight[1],
                                                    pPredWeight[1][RefIndexL1].chroma_offset[1]);
                                BiDirWeightBlock(pDstU_sb-8, pDstU_sb, pDstU_sb-8,
                                                    pitch, sbwidth>>1, sbheight>>1,
                                                    chroma_log2_weight_denom,
                                                    pPredWeight[0][RefIndexL0].chroma_weight[0],
                                                    pPredWeight[0][RefIndexL0].chroma_offset[0],
                                                    pPredWeight[1][RefIndexL1].chroma_weight[0],
                                                    pPredWeight[1][RefIndexL1].chroma_offset[0]);
                            }
                        }
                        else if (weighted_bipred_idc == 2)
                        {
                            // combine bidir predictions into one, implicit weighting
                            iDistScaleFactor = pDistScaleFactors[RefIndexL0]>>2;
                            // luma

                            BiDirWeightBlockImplicit(pDstY_sb-16, pDstY_sb, pDstY_sb-16,
                                                pitch, pitch, sbwidth, sbheight,
                                                64 - iDistScaleFactor,
                                                iDistScaleFactor);
                            if (color_format==1)
                            {
                                // chroma
                                BiDirWeightBlockImplicit(pDstV_sb-8, pDstV_sb, pDstV_sb-8,
                                                    pitch, pitch, sbwidth>>1, sbheight>>1,
                                                    64 - iDistScaleFactor,
                                                    iDistScaleFactor);
                                BiDirWeightBlockImplicit(pDstU_sb-8, pDstU_sb, pDstU_sb-8,
                                                    pitch, pitch, sbwidth>>1, sbheight>>1,
                                                    64 - iDistScaleFactor,
                                                    iDistScaleFactor);
                            }
                        }
                        else
                            VM_ASSERT(0);
                    }    // weighted
                }    // LoopCnt > 1
                block++;
            }    // xpos
        }    // ypos
    }    // not 8x8
    else
    {
        // MBTYPE_INTER_8x8:
        // 4 8x8 subblocks, each of which can be a different mode.
        for (block=0; block<4; block++)
        {
            /*if (bIsDirect || (psbdir[block] == D_DIR_DIRECT))
            {
                // For a DIRECT (temporal) block, get the subblock partitioning from the
                // colocated MB in the reference frame. When direct 8x8 inference
                // is ON, the smallest subpartition is 8x8.
                blocktype = bUseDirect8x8Inference ? SBTYPE_8x8 : psbtype_ref[block];
            }
            else*/
            {
                blocktype = psbtype[block];
            }
            switch (blocktype)
            {
            case SBTYPE_8x8:
                sbwidth = sbheight = 8;
                roi.width        = 8;
                roi.height        = 8;
                roi_cr.width    = 4;
                roi_cr.height    = 4;
                break;
            case SBTYPE_8x4:
                sbwidth = 8;
                sbheight = 4;
                roi.width        = 8;
                roi.height        = 4;
                roi_cr.width    = 4;
                roi_cr.height    = 2;
                break;
            case SBTYPE_4x8:
                sbwidth = 4;
                sbheight = 8;
                roi.width        = 4;
                roi.height        = 8;
                roi_cr.width    = 2;
                roi_cr.height    = 4;
                break;
            case SBTYPE_4x4:
            case SBTYPE_DIRECT:        // for spatial mode DIRECT
                sbwidth = sbheight = 4;
                roi.width        = 4;
                roi.height        = 4;
                roi_cr.width    = 2;
                roi_cr.height    = 2;
                break;
            default:
                VM_ASSERT(0);
                break;
            }    // switch sbtype

            for (ypos=yoff8[block]; ypos<yoff8[block]+8; ypos+=sbheight)
            {
                for (xpos=xoff8[block]; xpos<xoff8[block]+8; xpos+=sbwidth)
                {
                    if ((psbdir[block] == D_DIR_BIDIR) || //bIsDirect ||
                        (psbdir[block] == D_DIR_DIRECT) ||
                        (psbdir[block] == D_DIR_DIRECT_SPATIAL_BIDIR))
                    {
                        uBlockDir = D_DIR_BIDIR;
                        loopCnt = 2;
                        bUnidirWeightSB =  false;
                    }
                    else
                    {
                        loopCnt = 1;
                        if ((psbdir[block] == D_DIR_BWD) ||
                            (psbdir[block] == D_DIR_DIRECT_SPATIAL_BWD))
                            uBlockDir = D_DIR_BWD;
                        else
                            uBlockDir = D_DIR_FWD;
                        bUnidirWeightSB =  bUnidirWeightMB;
                    }

                    for (i=0; i<loopCnt; i++)
                    {
                        if ((uBlockDir == D_DIR_BWD) || (i > 0))
                        {
                            pRefIndex = pRefIndexL1 + (xpos>>2) + (ypos>>2)*4;
                            RefIndexL1 = *pRefIndex;