📄 mp4decvopp.c
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/* ///////////////////////////////////////////////////////////////////////
//
// 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) 2001-2008 Intel Corporation. All Rights Reserved.
//
// Description: Decodes P-VOPs
//
*/
#include "umc_defs.h"
#if defined (UMC_ENABLE_MPEG4_VIDEO_DECODER)
#include "mp4.h"
#include "mp4dec.h"
/*
// used for short_viseo_header
*/
/*static*/ mp4_Status mp4_PredictDecodeMV(mp4_Info *pInfo, mp4_MacroBlock *MBcurr, Ipp32s frGOB, Ipp32s y, Ipp32s x)
{
IppMotionVector *mvLeft, *mvTop, *mvRight, *mvCurr;
Ipp32s mbInRow = pInfo->VisualObject.VideoObject.MacroBlockPerRow;
mvCurr = MBcurr[0].mv;
mvLeft = MBcurr[-1].mv;
mvTop = MBcurr[-mbInRow].mv;
mvRight = MBcurr[-mbInRow+1].mv;
if (y == frGOB && x == 0) {
mvCurr->dx = mvCurr->dy = 0;
} else if (x == 0) {
mvCurr->dx = mp4_Median(0, mvTop[0].dx, mvRight[0].dx);
mvCurr->dy = mp4_Median(0, mvTop[0].dy, mvRight[0].dy);
} else if (y == frGOB) {
MBcurr->mv[0] = mvLeft[0];
} else if (x == mbInRow - 1) {
mvCurr->dx = mp4_Median(0, mvLeft[0].dx, mvTop[0].dx);
mvCurr->dy = mp4_Median(0, mvLeft[0].dy, mvTop[0].dy);
} else {
mvCurr->dx = mp4_Median(mvLeft[0].dx, mvTop[0].dx, mvRight[0].dx);
mvCurr->dy = mp4_Median(mvLeft[0].dy, mvTop[0].dy, mvRight[0].dy);
}
return mp4_DecodeMV(pInfo, mvCurr, 1);
}
/*
// decode MPEG-4 PVOP
*/
mp4_Status mp4_DecodeVOP_P(mp4_Info* pInfo)
{
__ALIGN16(Ipp16s, coeffMB, 64*6);
Ipp32s stepYr, stepYc, stepCbr, stepCbc, stepCrr, stepCrc, stepFc[6];
Ipp32s i, j, nmb, nmbgob, dx, dy, mbCurr, mbInVideoPacket, colNum, rowNum, mbPerRow, mbPerCol;
Ipp8u *pYc, *pCbc, *pCrc, *pYr, *pCbr, *pCrr, *pFc[6];
Ipp32s mb_not_coded, mb_type, cbpc, cbpy, ac_pred_flag, cbpyPrev;
Ipp32s dcVLC, quant, quantPred, rvlc, scan, obmc_disable, rt, quarter_sample;
IppiRect limitRectL, limitRectC;
IppMotionVector mvCur[4], mvPrev[4], mvTmp[4], mvCbCr;
mp4_MacroBlock *pMBinfo;
mp4_Status sts;
#ifdef USE_NOTCODED_STATE
Ipp8u *ncState = pInfo->VisualObject.VideoObject.ncState;
#endif
mbPerRow = pInfo->VisualObject.VideoObject.MacroBlockPerRow;
mbPerCol = pInfo->VisualObject.VideoObject.MacroBlockPerCol;
stepYc = pInfo->VisualObject.cFrame.stepY;
stepYr = pInfo->VisualObject.rFrame.stepY;
stepCbc = pInfo->VisualObject.cFrame.stepCb;
stepCbr = pInfo->VisualObject.rFrame.stepCb;
stepCrc = pInfo->VisualObject.cFrame.stepCr;
stepCrr = pInfo->VisualObject.rFrame.stepCr;
pYc = pInfo->VisualObject.cFrame.pY;
pCbc = pInfo->VisualObject.cFrame.pCb;
pCrc = pInfo->VisualObject.cFrame.pCr;
pYr = pInfo->VisualObject.rFrame.pY;
pCbr = pInfo->VisualObject.rFrame.pCb;
pCrr = pInfo->VisualObject.rFrame.pCr;
stepFc[0] = stepFc[1] = stepFc[2] = stepFc[3] = stepYc; stepFc[4] = stepCbc; stepFc[5] = stepCrc;
// Bounding rectangle for MV limitation
limitRectL.x = - 16 * MP4_NUM_EXT_MB;
limitRectL.y = - 16 * MP4_NUM_EXT_MB;
limitRectL.width = pInfo->VisualObject.VideoObject.width + 16 * 2 * MP4_NUM_EXT_MB;
limitRectL.height = pInfo->VisualObject.VideoObject.height + 16 * 2 * MP4_NUM_EXT_MB;
pMBinfo = pInfo->VisualObject.VideoObject.MBinfo;
// warning "variable may be used without having been initialized"
cbpc = cbpy = mb_type = 0;
nmb = pInfo->VisualObject.VideoObject.MacroBlockPerVOP;
mbCurr = colNum = rowNum = 0;
sts = MP4_STATUS_OK;
// decode short_video_header P-VOP
if (pInfo->VisualObject.VideoObject.short_video_header) {
Ipp32s frGOB;
IppMotionVector mvCur;
quant = pInfo->VisualObject.VideoObject.VideoObjectPlaneH263.vop_quant;
nmbgob = 0;
pInfo->VisualObject.VideoObject.VideoObjectPlaneH263.gob_number = 0;
frGOB = 0;
for (;;) {
do {
mb_not_coded = mp4_GetBit(pInfo);
if (mb_not_coded)
break;
if (mp4_DecodeMCBPC_P(pInfo, &mb_type, &cbpc, 1) != MP4_STATUS_OK)
goto Err_1;
} while (mb_type == IPPVC_MB_STUFFING);
if (mb_not_coded) {
#ifdef USE_NOTCODED_STATE
if (!(*ncState)) {
*ncState = 1;
#endif
ippiCopy16x16_8u_C1R(pYr, stepYr, pYc, stepYc);
ippiCopy8x8_8u_C1R(pCbr, stepCbr, pCbc, stepCbc);
ippiCopy8x8_8u_C1R(pCrr, stepCrr, pCrc, stepCrc);
#ifdef USE_NOTCODED_STATE
}
#endif
pMBinfo->mv[0].dx = pMBinfo->mv[0].dy = 0;
mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_NOTCODED);
} else {
#ifdef USE_NOTCODED_STATE
// clear not_coded MB state
*ncState = 0;
#endif
if (mb_type == IPPVC_MBTYPE_INTER4V || mb_type == IPPVC_MBTYPE_INTER4V_Q) {
mp4_Error("Error: 4MV shall not be used for short_video_header");
goto Err_1;
}
if (mp4_DecodeCBPY_P(pInfo, &cbpy, mb_type) != MP4_STATUS_OK)
goto Err_1;
if (mb_type == IPPVC_MBTYPE_INTER_Q || mb_type == IPPVC_MBTYPE_INTRA_Q)
mp4_UpdateQuant(pInfo, quant);
if (mb_type >= IPPVC_MBTYPE_INTRA) {
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_SVH(pInfo, (cbpy << 2) + cbpc, quant, pFc, stepFc) != MP4_STATUS_OK)
goto Err_1;
pMBinfo->mv[0].dx = pMBinfo->mv[0].dy = 0;
} else {
if (mp4_PredictDecodeMV(pInfo, pMBinfo, frGOB, rowNum, colNum) != MP4_STATUS_OK)
goto Err_1;
mp4_LimitMV(&pMBinfo->mv[0], &mvCur, &limitRectL, colNum * 16, rowNum * 16, 16);
mp4_ComputeChromaMV(&mvCur, &mvCbCr);
/*
if ((cbpy << 2) + cbpc)
if (mp4_DecodeInterMB_SVH(pInfo, coeffMB, quant, (cbpy << 2) + cbpc) != MP4_STATUS_OK)
goto Err;
mp4_Copy16x16HP_8u(pYr, stepYr, pYc, stepYc, &mvCur, 0);
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_MC_HP(cbpc & 2, pCbr, stepCbr, pCbc, stepCbc, coeffMB+256, &mvCbCr, 0);
mp4_MC_HP(cbpc & 1, pCrr, stepCrr, pCrc, stepCrc, coeffMB+320, &mvCbCr, 0);
*/
// decode and MC blocks
if (cbpy) {
mp4_DecodeMCInterBlock_SVH(pInfo, quant, cbpy & 8, pYr, pYc, stepYr, coeffMB, &mvCur, Err_1);
mp4_DecodeMCInterBlock_SVH(pInfo, quant, cbpy & 4, pYr+8, pYc+8, stepYr, coeffMB, &mvCur, Err_1);
mp4_DecodeMCInterBlock_SVH(pInfo, quant, cbpy & 2, pYr+stepYr*8, pYc+stepYc*8, stepYr, coeffMB, &mvCur, Err_1);
mp4_DecodeMCInterBlock_SVH(pInfo, quant, cbpy & 1, pYr+8+stepYr*8, pYc+8+stepYc*8, stepYr, coeffMB, &mvCur, Err_1);
} else {
mp4_Copy16x16HP_8u(pYr, stepYr, pYc, stepYc, &mvCur, 0);
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_DecodeMCInterBlock_SVH(pInfo, quant, cbpc & 2, pCbr, pCbc, stepCbr, coeffMB, &mvCbCr, Err_1);
mp4_DecodeMCInterBlock_SVH(pInfo, quant, cbpc & 1, pCrr, pCrc, stepCrr, coeffMB, &mvCbCr, Err_1);
}
}
pMBinfo ++;
#ifdef USE_NOTCODED_STATE
ncState ++;
#endif
colNum ++;
if (colNum == mbPerRow) {
colNum = 0;
rowNum ++;
if (rowNum == mbPerCol)
break;
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;
}
nmbgob ++;
if (nmbgob == pInfo->VisualObject.VideoObject.VideoObjectPlaneH263.num_macroblocks_in_gob && pInfo->VisualObject.VideoObject.VideoObjectPlaneH263.gob_number < (pInfo->VisualObject.VideoObject.VideoObjectPlaneH263.num_gobs_in_vop - 1)) {
ErrRet_1:
if (mp4_CheckDecodeGOB_SVH(pInfo) != MP4_STATUS_OK)
goto Err_1;
if (!pInfo->VisualObject.VideoObject.VideoObjectPlaneH263.gob_header_empty) {
quant = pInfo->VisualObject.VideoObject.VideoObjectPlaneH263.quant_scale;
i = pInfo->VisualObject.VideoObject.VideoObjectPlaneH263.gob_number * pInfo->VisualObject.VideoObject.VideoObjectPlaneH263.num_rows_in_gob;
frGOB = i;
mp4_CopyMacroBlocks(&pInfo->VisualObject.rFrame, &pInfo->VisualObject.cFrame, mbPerRow, rowNum, colNum, (i - rowNum) * mbPerRow - colNum);
rowNum = i;
colNum = 0;
pYc = pInfo->VisualObject.cFrame.pY + i * stepYc * 16; pCbc = pInfo->VisualObject.cFrame.pCb + i * stepCbc * 8; pCrc = pInfo->VisualObject.cFrame.pCr + i * stepCrc * 8;
pYr = pInfo->VisualObject.rFrame.pY + i * stepYr * 16; pCbr = pInfo->VisualObject.rFrame.pCb + i * stepCbr * 8; pCrr = pInfo->VisualObject.rFrame.pCr + i * stepCrr * 8;
pMBinfo = pInfo->VisualObject.VideoObject.MBinfo + i * mbPerRow;
#ifdef USE_NOTCODED_STATE
ncState = pInfo->VisualObject.VideoObject.ncState + i * mbPerRow;
#endif
}
nmbgob = 0;
}
}
mp4_AlignBits(pInfo);
return sts;
Err_1:
sts = MP4_STATUS_ERROR;
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