umc_h264_segment_decoder_deblocking_prepare.cpp

audio-video-codecs.rar语音编解码器

                        nNeighbourBlock = nBlock + 3;
                    }
                    else
                    {
                        nBlock = idx;
                        nNeighbourBlock = idx + 12;
                    }

                    // field coded image
                    if (FRM_STRUCTURE > m_pCurrentFrame->m_PictureStructureForDec)
                    {
                        H264DecoderFrame **pRefPicList;
                        Ipp32s index;
                        ReferenceFlags *pFields;

                        // select reference index for current block
                        index = m_gmbinfo->RefIdxs[0][MBAddr].RefIdxs[nBlock];
                        if (0 <= index)
                        {
                            pRefPicList = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + MBAddr)->slice_id, 0)->m_RefPicList;
                            // select reference fields number array
                            pFields = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + MBAddr)->slice_id, 0)->m_Flags;
                            iRefQFrw = pRefPicList[index]->DeblockPicID(pRefPicList[index]->GetNumberByParity(GetReferenceField(pFields, index)));
                        }
                        else
                            iRefQFrw = -1;
                        index = m_gmbinfo->RefIdxs[1][MBAddr].RefIdxs[nBlock];
                        if (0 <= index)
                        {
                            pRefPicList = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + MBAddr)->slice_id, 1)->m_RefPicList;
                            // select reference fields number array
                            pFields = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + MBAddr)->slice_id, 1)->m_Flags;
                            iRefQBck = pRefPicList[index]->DeblockPicID(pRefPicList[index]->GetNumberByParity(GetReferenceField(pFields, index)));
                        }
                        else
                            iRefQBck = -1;

                        // select reference index for previous block
                        index = m_gmbinfo->RefIdxs[0][nNeighbour].RefIdxs[nNeighbourBlock];
                        if (0 <= index)
                        {
                            pRefPicList = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + nNeighbour)->slice_id, 0)->m_RefPicList;
                            // select reference fields number array
                            pFields = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + nNeighbour)->slice_id, 0)->m_Flags;
                            iRefPFrw = pRefPicList[index]->DeblockPicID(pRefPicList[index]->GetNumberByParity(GetReferenceField(pFields, index)));
                        }
                        else
                            iRefPFrw = -1;
                        index = m_gmbinfo->RefIdxs[1][nNeighbour].RefIdxs[nNeighbourBlock];
                        if (0 <= index)
                        {
                            pRefPicList = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + nNeighbour)->slice_id, 1)->m_RefPicList;
                            // select reference fields number array
                            pFields = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + nNeighbour)->slice_id, 1)->m_Flags;
                            iRefPBck = pRefPicList[index]->DeblockPicID(pRefPicList[index]->GetNumberByParity(GetReferenceField(pFields, index)));
                        }
                        else
                            iRefPBck = -1;
                    }
                    // frame coded image
                    else
                    {
                        H264DecoderFrame **pRefPicList;
                        Ipp32s index;

                        // select reference index for current block
                        index = m_gmbinfo->RefIdxs[0][MBAddr].RefIdxs[nBlock];
                        if (0 <= index)
                        {
                            pRefPicList = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + MBAddr)->slice_id, 0)->m_RefPicList;
                            iRefQFrw = pRefPicList[index]->DeblockPicID(0);
                        }
                        else
                            iRefQFrw = -1;
                        index = m_gmbinfo->RefIdxs[1][MBAddr].RefIdxs[nBlock];
                        if (0 <= index)
                        {
                            pRefPicList = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + MBAddr)->slice_id, 1)->m_RefPicList;
                            iRefQBck = pRefPicList[index]->DeblockPicID(0);
                        }
                        else
                            iRefQBck = -1;

                        // select reference index for previous block
                        index = m_gmbinfo->RefIdxs[0][nNeighbour].RefIdxs[nNeighbourBlock];
                        if (0 <= index)
                        {
                            pRefPicList = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + nNeighbour)->slice_id, 0)->m_RefPicList;
                            iRefPFrw = pRefPicList[index]->DeblockPicID(0);
                        }
                        else
                            iRefPFrw = -1;
                        index = m_gmbinfo->RefIdxs[1][nNeighbour].RefIdxs[nNeighbourBlock];
                        if (0 <= index)
                        {
                            pRefPicList = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + nNeighbour)->slice_id, 1)->m_RefPicList;
                            iRefPBck = pRefPicList[index]->DeblockPicID(0);
                        }
                        else
                            iRefPBck = -1;
                    }

                    // when reference indexes are equal
                    if (((iRefQFrw == iRefPFrw) && (iRefQBck == iRefPBck)) ||
                        ((iRefQFrw == iRefPBck) && (iRefQBck == iRefPFrw)))
                    {
                        // set initial value of strength
                        pStrength[idx] = 0;

                        // when forward and backward reference pictures of previous block are different
                        if (iRefPFrw != iRefPBck)
                        {
                            H264DecoderMotionVector *pVectorQFrw, *pVectorQBck;
                            H264DecoderMotionVector *pVectorPFrw, *pVectorPBck;

                            // select current block motion vectors
                            pVectorQFrw = m_gmbinfo->MV[0][MBAddr].MotionVectors + nBlock;
                            pVectorQBck = m_gmbinfo->MV[1][MBAddr].MotionVectors + nBlock;

                            // select previous block motion vectors
                            if (iRefQFrw == iRefPFrw)
                            {
                                pVectorPFrw = m_gmbinfo->MV[0][nNeighbour].MotionVectors + nNeighbourBlock;
                                pVectorPBck = m_gmbinfo->MV[1][nNeighbour].MotionVectors + nNeighbourBlock;
                            }
                            else
                            {
                                pVectorPFrw = m_gmbinfo->MV[1][nNeighbour].MotionVectors + nNeighbourBlock;
                                pVectorPBck = m_gmbinfo->MV[0][nNeighbour].MotionVectors + nNeighbourBlock;
                            }

                            // compare motion vectors
                            if ((4 <= abs(pVectorQFrw->mvx - pVectorPFrw->mvx)) ||
                                (nVectorDiffLimit <= abs(pVectorQFrw->mvy - pVectorPFrw->mvy)) ||
                                (4 <= abs(pVectorQBck->mvx - pVectorPBck->mvx)) ||
                                (nVectorDiffLimit <= abs(pVectorQBck->mvy - pVectorPBck->mvy)))
                            {
                                pStrength[idx] = 1;
                                *pDeblockingFlag = 1;
                            }
                        }
                        // when forward and backward reference pictures of previous block are equal
                        else
                        {
                            H264DecoderMotionVector *pVectorQFrw, *pVectorQBck;
                            H264DecoderMotionVector *pVectorPFrw, *pVectorPBck;

                            // select current block motion vectors
                            pVectorQFrw = m_gmbinfo->MV[0][MBAddr].MotionVectors + nBlock;
                            pVectorQBck = m_gmbinfo->MV[1][MBAddr].MotionVectors + nBlock;

                            // select previous block motion vectors
                            pVectorPFrw = m_gmbinfo->MV[0][nNeighbour].MotionVectors + nNeighbourBlock;
                            pVectorPBck = m_gmbinfo->MV[1][nNeighbour].MotionVectors + nNeighbourBlock;

                            // compare motion vectors
                            if ((4 <= abs(pVectorQFrw->mvx - pVectorPFrw->mvx)) ||
                                (nVectorDiffLimit <= abs(pVectorQFrw->mvy - pVectorPFrw->mvy)) ||
                                (4 <= abs(pVectorQBck->mvx - pVectorPBck->mvx)) ||
                                (nVectorDiffLimit <= abs(pVectorQBck->mvy - pVectorPBck->mvy)))
                            {
                                if ((4 <= abs(pVectorQFrw->mvx - pVectorPBck->mvx)) ||
                                    (nVectorDiffLimit <= abs(pVectorQFrw->mvy - pVectorPBck->mvy)) ||
                                    (4 <= abs(pVectorQBck->mvx - pVectorPFrw->mvx)) ||
                                    (nVectorDiffLimit <= abs(pVectorQBck->mvy - pVectorPFrw->mvy)))
                                {
                                    pStrength[idx] = 1;
                                    *pDeblockingFlag = 1;
                                }
                            }
                        }
                    }
                    // when reference indexes are different
                    else
                    {
                        pStrength[idx] = 1;
                        *pDeblockingFlag = 1;
                    }
                }
            }
        }
        // external edge required in strong filtering
        else
        {
            if ((HORIZONTAL_DEBLOCKING == dir) &&
                (pParams->MBFieldCoded))
                SetEdgeStrength(pStrength + 0, 3);
            else
                SetEdgeStrength(pStrength + 0, 4);
            *pDeblockingFlag = 1;
        }
    }

    //
    // internal edge(s)
    //
    {
        Ipp32s idx;

        // cicle of edge(s)
        // we do all edges in one cicle
        for (idx = 4;idx < 16;idx += 1)
        {
            Ipp32s blkQ;

            blkQ = INTERNAL_BLOCKS_MASK[dir][idx - 4];

            if (cbp4x4_luma & blkQ)
            {
                pStrength[idx] = 2;
                *pDeblockingFlag = 1;
            }
            // compare motion vectors & reference indexes
            else
            {
                Ipp32s nBlock, nNeighbourBlock;
                Ipp32s iRefQFrw, iRefQBck, iRefPFrw, iRefPBck;
                Ipp32s nVectorDiffLimit = pParams->nMaxMVector;

                // calc block and neighbour block number
                if (VERTICAL_DEBLOCKING == dir)
                {
                    nBlock = (idx & 3) * 4 + (idx >> 2);
                    nNeighbourBlock = nBlock - 1;
                }
                else
                {
                    nBlock = idx;
                    nNeighbourBlock = idx - 4;
                }

                // field coded image
                if (FRM_STRUCTURE > m_pCurrentFrame->m_PictureStructureForDec)
                {
                    H264DecoderFrame **pRefPicList;
                    Ipp32s index;
                    ReferenceFlags *pFields;

                    pRefPicList = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + MBAddr)->slice_id, 0)->m_RefPicList;
                    // select reference fields number array
                    pFields = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + MBAddr)->slice_id, 0)->m_Flags;

                    // select forward reference index for blocks
                    index = m_gmbinfo->RefIdxs[0][MBAddr].RefIdxs[nBlock];
                    iRefQFrw = (index < 0) ?
                            (-1) :
                            pRefPicList[index]->DeblockPicID(pRefPicList[index]->GetNumberByParity(GetReferenceField(pFields, index)));
                    index = m_gmbinfo->RefIdxs[0][MBAddr].RefIdxs[nNeighbourBlock];
                    iRefPFrw = (index < 0) ?
                            (-1) :
                            pRefPicList[index]->DeblockPicID(pRefPicList[index]->GetNumberByParity(GetReferenceField(pFields, index)));

                    pRefPicList = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + MBAddr)->slice_id, 1)->m_RefPicList;
                    // select reference fields number array
                    pFields = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + MBAddr)->slice_id, 1)->m_Flags;

                    // select backward reference index for blocks
                    index = m_gmbinfo->RefIdxs[1][MBAddr].RefIdxs[nBlock];
                    iRefQBck = (index < 0) ?
                            (-1) :
                            pRefPicList[index]->DeblockPicID(pRefPicList[index]->GetNumberByParity(GetReferenceField(pFields, index)));
                    index = m_gmbinfo->RefIdxs[1][MBAddr].RefIdxs[nNeighbourBlock];
                    iRefPBck = (index < 0) ?
                            (-1) :
                    pRefPicList[index]->DeblockPicID(pRefPicList[index]->GetNumberByParity(GetReferenceField(pFields, index)));

                }
                // frame coded image
                else
                {
                    H264DecoderFrame **pRefPicList;
                    Ipp32s index;

                    // select forward reference pictures list
                    pRefPicList = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + MBAddr)->slice_id, 0)->m_RefPicList;
                    // select forward reference index for block(s)
                    index = m_gmbinfo->RefIdxs[0][MBAddr].RefIdxs[nBlock];
                    iRefQFrw = (index < 0) ?
                            (-1) :
                            (pRefPicList[index]->DeblockPicID(0));
                    index = m_gmbinfo->RefIdxs[0][MBAddr].RefIdxs[nNeighbourBlock];
                    iRefPFrw = (index < 0) ?
                            (-1) :
                            pRefPicList[index]->DeblockPicID(0);

                    // select backward reference pictures list
                    pRefPicList = m_pCurrentFrame->GetRefPicList((m_gmbinfo->mbs + MBAddr)->slice_id, 1)->m_RefPicList;
                    // select backward reference index for block(s)
                    index = m_gmbinfo->RefIdxs[1][MBAddr].RefIdxs[nBlock];
                    iRefQBck = (index < 0) ?
                            (-1) :
                            (pRefPicList[index]->DeblockPicID(0));
                    index = m_gmbinfo->RefIdxs[1][MBAddr].RefIdxs[nNeighbourBlock];
                    iRefPBck = (index < 0) ?
                            (-1) :
                            pRefPicList[index]->DeblockPicID(0);
                }

                // when reference indexes are equal
                if (((iRefQFrw == iRefPFrw) && (iRefQBck == iRefPBck)) ||
                    ((iRefQFrw == iRefPBck) && (iRefQBck == iRefPFrw)))
                {
                    // set initial value of strength
                    pStrength[idx] = 0;

                    // when forward and backward reference pictures of previous block are different
                    if (iRefPFrw != iRefPBck)
                    {
                        H264DecoderMotionVector *pVectorQFrw, *pVectorQBck;
                        H264DecoderMotionVector *pVectorPFrw, *pVectorPBck;

                        // select current block motion vectors
                        pVectorQFrw = m_gmbinfo->MV[0][MBAddr].MotionVectors + nBlock;
                        pVectorQBck = m_gmbinfo->MV[1][MBAddr].MotionVectors + nBlock;

                        // select previous block motion vectors
                        if (iRefQFrw == iRefPFrw)
                        {
                            pVectorPFrw = m_gmbinfo->MV[0][MBAddr].MotionVectors + nNeighbourBlock;
                            pVectorPBck = m_gmbinfo->MV[1][MBAddr].MotionVectors + nNeighbourBlock;
                        }