📄 mp4decvops.c
字号:
}
quant = pMBdp->quant;
mb_type = pMBinfo->type;
mcsel = pMBdp->mcsel;
if (!mcsel && (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;
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 (mp4_DecodeIntraMB_DP(pInfo, pMBdp->dct_dc, colNum, pMBdp->pat, quant, dcVLC, pMBdp->ac_pred_flag, pF, stepF) != MP4_STATUS_OK)
goto Err_2;
} else {
mp4_UpdateIntraPredBuffInvalid(pInfo, colNum);
dx = colNum * 16;
dy = rowNum * 16;
pat = pMBdp->pat;
cbpy = pat >> 2;
cbpc = pat & 3;
if (pat)
if (mp4_DecodeInterMB(pInfo, coeffMB, quant, pat, scan) != MP4_STATUS_OK)
goto Err_2;
if (!mcsel) {
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 (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);
} else {
if (mb_type == IPPVC_MBTYPE_INTER4V) {
mp4_Copy8x8HP_8u(pYr, stepYr, pYc, stepYc, &mvCur[0], rt);
mp4_Copy8x8HP_8u(pYr+8, stepYr, pYc+8, stepYc, &mvCur[1], rt);
mp4_Copy8x8HP_8u(pYr+8*stepYr, stepYr, pYc+8*stepYc, stepYc, &mvCur[2], rt);
mp4_Copy8x8HP_8u(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_AddResidual(cbpy & 8, pYc, stepYc, coeffMB);
mp4_AddResidual(cbpy & 4, pYc+8, stepYc, coeffMB+64);
mp4_AddResidual(cbpy & 2, pYc+stepYc*8, stepYc, coeffMB+128);
mp4_AddResidual(cbpy & 1, pYc+stepYc*8+8, stepYc, coeffMB+192);
} else {
mp4_OBMC(pInfo, pMBinfo, mvCur, colNum, rowNum, limitRectL, pYc, stepYc, pYr, stepYr, cbpy, coeffMB, 0);
}
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);
} else {
IppiRect mbRect;
mbRect.x = dx; mbRect.y = dy; mbRect.width = mbRect.height = 16;
ippiWarpLuma_MPEG4_8u_C1R(pInfo->VisualObject.rFrame.pY, stepYr, pYc, stepYc, &mbRect, pInfo->VisualObject.VideoObject.WarpSpec);
mbRect.x >>= 1; mbRect.y >>= 1; mbRect.width = mbRect.height = 8;
ippiWarpChroma_MPEG4_8u_P2R(pInfo->VisualObject.rFrame.pCb, stepCbr, pInfo->VisualObject.rFrame.pCr, stepCrr, pCbc, stepCbc, pCrc, stepCrc, &mbRect, pInfo->VisualObject.VideoObject.WarpSpec);
if (pat) {
mp4_AddResidual(cbpy & 8, pYc, stepYc, coeffMB);
mp4_AddResidual(cbpy & 4, pYc+8, stepYc, coeffMB+64);
mp4_AddResidual(cbpy & 2, pYc+stepYc*8, stepYc, coeffMB+128);
mp4_AddResidual(cbpy & 1, pYc+stepYc*8+8, stepYc, coeffMB+192);
mp4_AddResidual(cbpc & 2, pCbc, stepCbc, coeffMB+256);
mp4_AddResidual(cbpc & 1, pCrc, stepCrc, coeffMB+320);
}
}
}
pMBinfo ++;
pMBdp ++;
colNum ++;
if (colNum == mbPerRow) {
colNum = 0;
rowNum ++;
if (rowNum == mbPerCol)
return sts;
pYc += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYc << 4) - stepYc;
pCbc += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCbc << 3) - stepCbc;
pCrc += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCrc << 3) - stepCrc;
pYr += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYr << 4) - stepYr;
pCbr += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCbr << 3) - stepCbr;
pCrr += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCrr << 3) - stepCrr;
} else {
pYc += 16; pCrc += 8; pCbc += 8;
pYr += 16; pCrr += 8; pCbr += 8;
}
}
//mbCurr += mbInVideoPacket;
if (!pInfo->VisualObject.VideoObject.resync_marker_disable) {
Ipp32s found;
ErrRet_2:
if (mp4_CheckDecodeVideoPacket(pInfo, &found) == MP4_STATUS_OK) {
if (found) {
quant = pInfo->VisualObject.VideoObject.VideoObjectPlane.quant_scale;
mbInVideoPacket = pInfo->VisualObject.VideoObject.VideoObjectPlane.macroblock_num - mbCurr;
mbCurr = pInfo->VisualObject.VideoObject.VideoObjectPlane.macroblock_num;
mp4_CopyMacroBlocks(&pInfo->VisualObject.rFrame, &pInfo->VisualObject.cFrame, mbPerRow, rowNum, colNum, mbCurr - rowNum * mbPerRow - colNum);
rowNum = mbCurr / mbPerRow;
colNum = mbCurr % mbPerRow;
pYc = pInfo->VisualObject.cFrame.pY + (rowNum * stepYc + colNum) * 16; pCbc = pInfo->VisualObject.cFrame.pCb + (rowNum * stepCbc + colNum) * 8; pCrc = pInfo->VisualObject.cFrame.pCr + (rowNum * stepCrc + colNum) * 8;
pYr = pInfo->VisualObject.rFrame.pY + (rowNum * stepYr + colNum) * 16; pCbr = pInfo->VisualObject.rFrame.pCb + (rowNum * stepCbr + colNum) * 8; pCrr = pInfo->VisualObject.rFrame.pCr + (rowNum * stepCrr + colNum) * 8;
pMBinfo = pInfo->VisualObject.VideoObject.MBinfo + mbCurr;
} else
goto Err_2;
} else
goto Err_2;
}
// mark MBs the previous videopacket as invalid for prediction
for (i = 1; i <= IPP_MIN(mbInVideoPacket, mbPerRow + 1); i ++)
pMBinfo[-i].validPred = 0;
}
Err_2:
sts = MP4_STATUS_ERROR;
if (pInfo->stopOnErr)
return sts;
if (pInfo->VisualObject.VideoObject.resync_marker_disable || !mp4_SeekResyncMarker(pInfo)) {
mp4_CopyMacroBlocks(&pInfo->VisualObject.rFrame, &pInfo->VisualObject.cFrame, mbPerRow, rowNum, colNum, pInfo->VisualObject.VideoObject.MacroBlockPerVOP - rowNum * mbPerRow - colNum);
return sts;
}
goto ErrRet_2;
}
// decode not data_partitioned S-VOP
{
Ipp32s 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"
dx = dy = ac_pred_flag = cbpy = cbpyPrev = field_prediction = dct_type = dct_typePrev = mb_ftfr = mb_fbfr = 0;
mvCbCr.dx = mvCbCr.dy = 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)
goto Err_3;
}
if (mb_type != IPPVC_MB_STUFFING) {
if (!mb_not_coded) {
mcsel = (mb_type < IPPVC_MBTYPE_INTER4V) ? mp4_GetBit(pInfo) : 0;
if (mb_type >= IPPVC_MBTYPE_INTRA)
ac_pred_flag = mp4_GetBit(pInfo);
if (mp4_DecodeCBPY_P(pInfo, &cbpy, mb_type) != MP4_STATUS_OK)
goto Err_3;
quantPred = quant;
if (mb_type == IPPVC_MBTYPE_INTER_Q || mb_type == IPPVC_MBTYPE_INTRA_Q)
mp4_UpdateQuant(pInfo, quant);
if (interlaced) {
dct_type = 0;
field_prediction = 0;
if (mb_type >= IPPVC_MBTYPE_INTRA || (cbpy + cbpc) != 0)
dct_type = mp4_GetBit(pInfo);
if ((mb_type == IPPVC_MBTYPE_INTER || mb_type == IPPVC_MBTYPE_INTER_Q) && !mcsel) {
field_prediction = mp4_GetBit(pInfo);
if (field_prediction) {
mb_ftfr = mp4_GetBit(pInfo);
mb_fbfr = mp4_GetBit(pInfo);
}
}
}
} else {
mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_NOTCODED);
mcsel = 1;
field_prediction = 0;
}
pMBinfo->validPred = 1;
pMBinfo->not_coded = 0; // for B-VOP all MB have MVs
pMBinfo->type = (Ipp8u)(mcsel ? IPPVC_MBTYPE_INTRA : mb_type); // for OBMC MVs
pMBinfo->field_info = (Ipp8u)(field_prediction + (mb_ftfr << 1) + (mb_fbfr << 2));
if (mb_type >= IPPVC_MBTYPE_INTRA) {
if (mbInVideoPacket == 0)
quantPred = quant;
dcVLC = (quantPred < mp4_DC_vlc_Threshold[pInfo->VisualObject.VideoObject.VideoObjectPlane.intra_dc_vlc_thr]) ? 1 : 0;
if (dct_type) {
stepY = stepYc * 2;
pYoff23 = stepYc;
} else {
stepY = stepYc;
pYoff23 = 8 * stepYc;
}
stepF[0] = stepF[1] = stepF[2] = stepF[3] = stepY;
pF[0] = pYc; pF[1] = pYc + 8; pF[2] = pYc + pYoff23; pF[3] = pYc + pYoff23 + 8; pF[4] = pCbc; pF[5] = pCrc;
if (mp4_DecodeIntraMB(pInfo, colNum, (cbpy << 2) + cbpc, quant, dcVLC, ac_pred_flag, pF, stepF) != MP4_STATUS_OK)
goto Err_3;
mp4_Zero4MV(pMBinfo->mv);
} else {
mp4_UpdateIntraPredBuffInvalid(pInfo, colNum);
dx = colNum * 16;
dy = rowNum * 16;
if (!mcsel) {
if (!field_prediction) {
if (mb_type != IPPVC_MBTYPE_INTER4V) {
if (mp4_PredictDecode1MV(pInfo, pMBinfo, rowNum, colNum) != MP4_STATUS_OK)
goto Err_3;
pMBinfo->mv[1] = pMBinfo->mv[2] = pMBinfo->mv[3] = pMBinfo->mv[0];
if (quarter_sample) {
mp4_LimitMVQ(pMBinfo->mv, mvCur, &limitRectL, dx, dy, 16);
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -