h263decframep.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.

/* ///////////////////////////////////////////////////////////////////////
//
//               INTEL CORPORATION PROPRIETARY INFORMATION
//  This software is supplied under the terms of a license agreement or
//  nondisclosure agreement with Intel Corporation and may not be copied
//  or disclosed except in accordance with the terms of that agreement.
//        Copyright (c) 2005 Intel Corporation. All Rights Reserved.
//
//  Description:    Decodes P-Frames
//
*/

#include "h263.h"
#include "h263dec.h"

static h263_Status h263_PredictDecode4MV_PB(h263_Info *pInfo, IppMotionVector *mv,
                                         IppMotionVector *mvF, IppMotionVector *mvB, IppMotionVector *mvFPrev,
                                         int mb_type, int mvdb, int trd, int trb, int fourMV)
{
  h263_Status status = H263_STATUS_OK;
  h263_VideoPicture *VPic = &pInfo->VideoSequence.VideoPicture;
  int mvdx = 0, mvdy = 0;
  int i, numMV = fourMV ? 4 : 1;
  int leftlim = VPic->modes.UMV ? -63 : -32;
  int rightlim = VPic->modes.UMV ? 63 : 31;

  if (mvdb) {
    if (!VPic->oppmodes.UMV) {
      status = h263_DecodeMVD(pInfo, &mvdx, &mvdy, 1);
    } else {
      status = h263_DecodeMVD_umvplus(pInfo, &mvdx, &mvdy);
    }
  }

  if (mb_type != IPPVC_MBTYPE_FORWARD) {
    for (i = 0; i < numMV; i++) {
      mvF[i].dx = (Ipp16s)(mv[i].dx * trb / trd);
      mvF[i].dy = (Ipp16s)(mv[i].dy * trb / trd);
    }
  } else
    mvF[0] = *mvFPrev;

  if (mb_type == -1) { /* PB-frame */
    if (!VPic->oppmodes.UMV) {
      for (i = 0; i < numMV; i++) {
        reconstructMV(&mvF[i], mvdx, mvdy, leftlim, rightlim);
        mvB[i].dx = (Ipp16s)(mvdx ? (mvF[i].dx - mv[i].dx) : ((trb - trd) * mv[i].dx / trd));
        mvB[i].dy = (Ipp16s)(mvdy ? (mvF[i].dy - mv[i].dy) : ((trb - trd) * mv[i].dy / trd));
      }
    } else {
      for (i = 0; i < numMV; i++) {
        mvF[i].dx = mvF[i].dx + (Ipp16s)mvdx;
        mvF[i].dy = mvF[i].dy + (Ipp16s)mvdy;
        mvB[i].dx = (Ipp16s)(mvdx ? (mvF[i].dx - mv[i].dx) : ((trb - trd) * mv[i].dx / trd));
        mvB[i].dy = (Ipp16s)(mvdy ? (mvF[i].dy - mv[i].dy) : ((trb - trd) * mv[i].dy / trd));
      }
    }
  } else if (mb_type == IPPVC_MBTYPE_INTERPOLATE) {
    for (i = 0; i < numMV; i++) {
      mvB[i].dx = (Ipp16s)((trb - trd) * mv[i].dx / trd);
      mvB[i].dy = (Ipp16s)((trb - trd) * mv[i].dy / trd);
    }
  } else { /* IPPVC_MBTYPE_FORWARD */
    if (!VPic->oppmodes.UMV) {
      reconstructMV(&mvF[0], mvdx, mvdy, leftlim, rightlim);
    } else {
      mvF[0].dx = mvF[0].dx + (Ipp16s)mvdx;
      mvF[0].dy = mvF[0].dy + (Ipp16s)mvdy;
    }
    *mvFPrev = mvF[0];
  }
  return status;
}

/*
//  decode H.263++ P-Picture
*/
h263_Status h263_DecodeFrame_P(h263_Info* pInfo, h263_Frame *rFrame)
{
  __ALIGN16(Ipp16s, coeffMB, 64*6);
  __ALIGN16(Ipp16s, coeffMB_b, 64*6);
  __ALIGN16(Ipp16s, coeffMB_bI, 64*2);
  __ALIGN16(Ipp8u, predMB, 64*6);
  int             quant, quant_c, bquant, bquant_c, i, dx, dy;
  int             stepYr, stepYc, stepCbr, stepCbc, stepCrr, stepCrc, mbPerRow, mbPerCol;
  int             colNum, rowNum, stepF[6];
  Ipp8u           *pYc, *pCbc, *pCrc, *pYr, *pCbr, *pCrr, *pF[6];
  Ipp8u           *pYn, *pCbn, *pCrn;
  int             stepYn, stepCbn, stepCrn;
  int             mb_not_coded, mb_type = 0, cbpc = 0, cbpy = 0, cbpyPrev = 0;
  int             rt;
  IppiRect        limitRectL, limitRectC;
  IppMotionVector mvCur[4], mvCbCr, mvPrev[4];
  IppMotionVector mvBack[4], mvForw[4], mvBackPrev[4], mvForwPrev[4], mvFCbCr, mvBCbCr, mvFCbCrPrev, mvBCbCrPrev, mvForwPred;
  h263_MacroBlock *pMBinfo;
  h263_VideoPicture *VPic = &pInfo->VideoSequence.VideoPicture;
  int gob_header_present = 1;
  int cbpb = 0, mvdb, bmb_type = 0, cbpbPrev = 0, bmb_typePrev = 0;
  int predMode = 0;
  h263_Status status;
  int num_rows_per_gob, num_gobs, row;
  int k;
  int fourMVmode = VPic->modes.advPred | VPic->oppmodes.advPred | VPic->oppmodes.deblockFilt;
  int obmcFlag = VPic->modes.advPred | VPic->oppmodes.advPred;
  int pbFlag = VPic->picture_coding_type == H263_PIC_TYPE_PB || VPic->picture_coding_type == H263_PIC_TYPE_iPB;
  int trd = VPic->temporal_reference - VPic->prev_temporal_reference;
  int trb = VPic->temporal_reference_B;
  int fourMVmb;

  if (trd < 0)
    trd += VPic->PCF ? 1024 : 256;

  stepYc = pInfo->VideoSequence.cFrame.stepY;
  stepYr = rFrame->stepY;
  stepCbc = pInfo->VideoSequence.cFrame.stepCb;
  stepCbr = rFrame->stepCb;
  stepCrc = pInfo->VideoSequence.cFrame.stepCr;
  stepCrr = rFrame->stepCr;
  pYc = pInfo->VideoSequence.cFrame.pY;
  pCbc = pInfo->VideoSequence.cFrame.pCb;
  pCrc = pInfo->VideoSequence.cFrame.pCr;
  pYr = rFrame->pY;
  pCbr = rFrame->pCb;
  pCrr = rFrame->pCr;
  stepF[0] = stepF[1] = stepF[2] = stepF[3] = stepYc; stepF[4] = stepCbc; stepF[5] = stepCrc;

  if (pbFlag) {
    stepYn = pInfo->VideoSequence.nFrame.stepY;
    stepCbn = pInfo->VideoSequence.nFrame.stepCb;
    stepCrn = pInfo->VideoSequence.nFrame.stepCr;
    pYn = pInfo->VideoSequence.nFrame.pY;
    pCbn = pInfo->VideoSequence.nFrame.pCb;
    pCrn = pInfo->VideoSequence.nFrame.pCr;
  }

  mbPerRow = pInfo->VideoSequence.VideoPicture.MacroBlockPerRow;
  mbPerCol = pInfo->VideoSequence.VideoPicture.MacroBlockPerCol;

  num_gobs = pInfo->VideoSequence.VideoPicture.num_gobs_in_pic;
  num_rows_per_gob = pInfo->VideoSequence.VideoPicture.RowsPerGOB;

  /* Bounding rectangle for MV limitation */

  limitRectL.x = -16;
  limitRectL.y = -16;
  limitRectL.width = pInfo->VideoSequence.VideoPicture.MacroBlockPerRow * 16 + 32;
  limitRectL.height = pInfo->VideoSequence.VideoPicture.MacroBlockPerCol * 16 + 32;
  limitRectC.x = -8;
  limitRectC.y = -8;
  limitRectC.width = pInfo->VideoSequence.VideoPicture.MacroBlockPerRow * 8 + 16;
  limitRectC.height = pInfo->VideoSequence.VideoPicture.MacroBlockPerCol * 8 + 16;

  rt = VPic->rtype;

  pMBinfo = pInfo->VideoSequence.MBinfo;

  {
    int              frGOB;
    h263_IntraPredBlock  *b = pInfo->VideoSequence.IntraPredBuff.block;

    quant = VPic->pic_quant;
    pInfo->VideoSequence.VideoPicture.gob_number = 0;
    dy = 0;
    frGOB = 0;
    if (VPic->oppmodes.deblockFilt)
      ippsZero_8u(pInfo->VideoSequence.GOBboundary, mbPerCol);

    for (i = 0; i < num_gobs; i++) {
      VPic->gob_number = i;

      if (i) {
        gob_header_present = h263_ParseGOBHeader(pInfo);
        if (gob_header_present < 0) {
          h263_Error("Error: Invalid GOB header");
          return H263_STATUS_PARSE_ERROR;
        }

        if (VPic->gob_number > 30)
          return H263_STATUS_OK; /* EOS or EOSBS */

        if (VPic->gob_number - i > 0) {
          pYc += (stepYc << 4) * num_rows_per_gob * (VPic->gob_number - i);
          pCbc += (stepCbc << 3) * num_rows_per_gob * (VPic->gob_number - i);
          pCrc += (stepCrc << 3) * num_rows_per_gob * (VPic->gob_number - i);
          pYr += (stepYr << 4) * num_rows_per_gob * (VPic->gob_number - i);
          pCbr += (stepCbr << 3) * num_rows_per_gob * (VPic->gob_number - i);
          pCrr += (stepCrr << 3) * num_rows_per_gob * (VPic->gob_number - i);
          pYn += (stepYn << 4) * num_rows_per_gob * (VPic->gob_number - i);
          pCbn += (stepCbn << 3) * num_rows_per_gob * (VPic->gob_number - i);
          pCrn += (stepCrn << 3) * num_rows_per_gob * (VPic->gob_number - i);
          pMBinfo += (VPic->gob_number - i) * num_rows_per_gob * mbPerRow;
          ippsSet_8u(127, pInfo->VideoSequence.GOBboundary + i*num_rows_per_gob, (VPic->gob_number - i) * num_rows_per_gob);
          i = VPic->gob_number;
        }
        if (gob_header_present) {
          frGOB = i*num_rows_per_gob;
          pInfo->VideoSequence.GOBboundary[frGOB] = 1;
        }
      }

      quant = quant_c = VPic->pic_quant;
      if (VPic->oppmodes.modQuant)
        quant_c = h263_quant_c[quant];

      if (VPic->picture_coding_type == H263_PIC_TYPE_PB || VPic->picture_coding_type == H263_PIC_TYPE_iPB) {
        bquant_c = bquant = (VPic->dbquant + 5)*quant >> 2;
        h263_CLIPR(bquant, 31);
        if (VPic->oppmodes.modQuant)
          bquant_c = h263_quant_c[bquant];
      }

      h263_CLIPR(num_rows_per_gob, (mbPerCol - i*num_rows_per_gob));

      if (gob_header_present && VPic->oppmodes.advIntra) {
        for (k = 0; k <= mbPerRow; k++) {
          b[k*6+0].dct_dc = b[k*6+1].dct_dc = b[k*6+2].dct_dc = b[k*6+3].dct_dc = b[k*6+4].dct_dc = b[k*6+5].dct_dc = -1;
        }
      }

      for (row = 0; row < num_rows_per_gob; row++) {
        rowNum = i*num_rows_per_gob + row;
        dy = rowNum * 16;
        for (colNum = 0; colNum < mbPerRow; colNum++) {
          dx = colNum * 16;
          do {
            mb_not_coded = h263_GetBit(pInfo);
            if (mb_not_coded)
              break;
            if (h263_DecodeMCBPC_P(pInfo, &mb_type, &cbpc, 1) != H263_STATUS_OK)
              return H263_STATUS_ERROR;
          } while (mb_type == IPPVC_MB_STUFFING);

          if (mb_not_coded) {
            if (!obmcFlag) {
              ippiCopy16x16_8u_C1R(pYr, stepYr, pYc, stepYc);
              ippiCopy8x8_8u_C1R(pCbr, stepCbr, pCbc, stepCbc);
              ippiCopy8x8_8u_C1R(pCrr, stepCrr, pCrc, stepCrc);
              if (pbFlag) {
                ippiCopy16x16_8u_C1R(pYr, stepYr, pYn, stepYn);
                ippiCopy8x8_8u_C1R(pCbr, stepCbr, pCbn, stepCbn);
                ippiCopy8x8_8u_C1R(pCrr, stepCrr, pCrn, stepCrn);
              }
            }
            mb_type = pMBinfo->type = IPPVC_MB_STUFFING; /* to indicate mb_not_coded */
            h263_Zero4MV(pMBinfo->mv);
            mvForwPred.dx = mvForwPred.dy = 0;
            if (VPic->oppmodes.advIntra) {
              for (k = 0; k < 6; k++)
                b[(colNum + 1)*6 + k].dct_dc = -1;
            }
            h263_StatisticInc_(&pInfo->VideoSequence.Statistic.nMB_NOTCODED);
          } else {

            pMBinfo->type = (Ipp8u)mb_type;

            if (VPic->oppmodes.advIntra && (mb_type == IPPVC_MBTYPE_INTRA || mb_type == IPPVC_MBTYPE_INTRA_Q))
              h263_AdvI_PredMode(pInfo, predMode);

            mvdb = cbpb = 0;
            if (VPic->picture_coding_type == H263_PIC_TYPE_PB) {
              if (h263_GetBit(pInfo)) {
                mvdb = 1;
                cbpb = h263_GetBit(pInfo);
              } else {
                mvForw[0].dx = mvForw[0].dy = mvBack[0].dx = mvBack[0].dy = 0;
              }
              bmb_type = -1;
              h263_StatisticInc_(&pInfo->VideoSequence.Statistic.nMB_INTERPOLATE_PB);
            } else if (VPic->picture_coding_type == H263_PIC_TYPE_iPB) {
              h263_DecodeMODB_iPB(pInfo, &bmb_type, &cbpb, &mvdb);
              if (!mvdb || colNum == 0)
                mvForwPred.dx = mvForwPred.dy = 0;
            }
            if (cbpb)
              cbpb = h263_GetBits9(pInfo, 6);

            if (VPic->oppmodes.altInterVLC && cbpc == 3) {
              if (h263_DecodeCBPY_I(pInfo, &cbpy) != H263_STATUS_OK)
                return H263_STATUS_ERROR;
            } else {
              if (h263_DecodeCBPY_P(pInfo, &cbpy, mb_type) != H263_STATUS_OK)
                return H263_STATUS_ERROR;
            }

            if (mb_type == IPPVC_MBTYPE_INTRA_Q || mb_type == IPPVC_MBTYPE_INTER_Q || mb_type == IPPVC_MBTYPE_INTER4V_Q) {
              if (!VPic->oppmodes.modQuant) {
                h263_UpdateQuant(pInfo, VPic->pic_quant);
                quant_c = VPic->pic_quant;
              } else {
                quant_c = h263_UpdateQuant_Mod(pInfo);
              }
              quant = VPic->pic_quant;
              if (VPic->picture_coding_type == H263_PIC_TYPE_PB || VPic->picture_coding_type == H263_PIC_TYPE_iPB) {
                bquant_c = bquant = (VPic->dbquant + 5)*quant >> 2;
                h263_CLIPR(bquant, 31);
                if (VPic->oppmodes.modQuant)
                  bquant_c = h263_quant_c[bquant];
              }
            }

            pMBinfo->quant = (Ipp8u)quant;

            if (mb_type == IPPVC_MBTYPE_INTRA || mb_type == IPPVC_MBTYPE_INTRA_Q) {
              pF[0] = pYc; pF[1] = pYc + 8; pF[2] = pYc + 8 * stepYc; pF[3] = pYc + 8 * stepYc + 8; pF[4] = pCbc; pF[5] = pCrc;

              if (VPic->picture_coding_type == H263_PIC_TYPE_PB || (VPic->picture_coding_type == H263_PIC_TYPE_iPB && bmb_type == IPPVC_MBTYPE_INTERPOLATE)) {
                if (h263_PredictDecodeMV(pInfo, pMBinfo, frGOB, rowNum, colNum, fourMVmode) != H263_STATUS_OK) {
                  h263_Error("Error when decoding motion vector");
                  return H263_STATUS_ERROR;
                }
                if (fourMVmode) {
                  pMBinfo->mv[1] = pMBinfo->mv[2] = pMBinfo->mv[3] = pMBinfo->mv[0];
                }
              } else {
                if (!fourMVmode)
                  pMBinfo->mv[0].dx = pMBinfo->mv[0].dy = 0;