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winamp/Src/mpeg4dec/mp4decvopi.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) 2001-2007 Intel Corporation. All Rights Reserved.
//
// Description: Decodes I-VOPs
//
*/
#include "mp4def.h"
#include "mp4dec.h"
/*
// decode mcbpc and set MBtype and ChromaPattern
*/
/*static*/ mp4_Status mp4_DecodeMCBPC_I(mp4_Info* pInfo, int32_t *mbType, int32_t *mbPattern)
{
uint32_t code;
int32_t type, pattern, fb;
code = mp4_ShowBits9(pInfo, 9);
if (code == 1) {
type = IPPVC_MB_STUFFING;
pattern = 0;
fb = 9;
} else if (code >= 64) {
type = IPPVC_MBTYPE_INTRA;
pattern = code >> 6;
if (pattern >= 4) {
pattern = 0;
fb = 1;
} else
fb = 3;
} else {
type = IPPVC_MBTYPE_INTRA_Q;
pattern = code >> 3;
if (pattern >= 4) {
pattern = 0;
fb = 4;
} else if (code >= 8) {
fb = 6;
} else {
mp4_Error("Error: decoding MCBPC");
return MP4_STATUS_ERROR;
}
}
mp4_FlushBits(pInfo, fb);
*mbType = type;
*mbPattern = pattern;
if (type == IPPVC_MBTYPE_INTRA)
mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_INTRA);
else if (type == IPPVC_MBTYPE_INTRA_Q)
mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_INTRA_Q);
return MP4_STATUS_OK;
}
/*
// decode IVOP
*/
mp4_Status mp4_DecodeVOP_I(mp4_Info* pInfo)
{
int32_t quant, quantPred, dcVLC, mb_type, cbpc, cbpy, ac_pred_flag;
int32_t i, j, nmb, nmbgob, stepYc, stepCbc, stepCrc, stepFc[6], mbCurr, mbInVideoPacket, colNum, rowNum, mbPerRow, mbPerCol;
uint8_t *pFc[6];
mp4_Status sts;
if (pInfo->VisualObject.cFrame)
{
DebugBreak();
}
pInfo->VisualObject.cFrame = CreateFrame(&pInfo->VisualObject);
stepYc = pInfo->VisualObject.cFrame->stepY;
stepCbc = pInfo->VisualObject.cFrame->stepCb;
stepCrc = pInfo->VisualObject.cFrame->stepCr;
mbPerRow = pInfo->VisualObject.VideoObject.MacroBlockPerRow;
mbPerCol = pInfo->VisualObject.VideoObject.MacroBlockPerCol;
stepFc[0] = stepFc[1] = stepFc[2] = stepFc[3] = stepYc; stepFc[4] = stepCbc; stepFc[5] = stepCrc;
pFc[0] = pInfo->VisualObject.cFrame->pY; pFc[1] = pInfo->VisualObject.cFrame->pY + 8;
pFc[2] = pInfo->VisualObject.cFrame->pY + 8 * stepYc; pFc[3] = pInfo->VisualObject.cFrame->pY + 8 * stepYc + 8;
pFc[4] = pInfo->VisualObject.cFrame->pCb; pFc[5] = pInfo->VisualObject.cFrame->pCr;
nmb = pInfo->VisualObject.VideoObject.MacroBlockPerVOP;
mbCurr = colNum = rowNum = 0;
sts = MP4_STATUS_OK;
// decode short_video_header I-VOP
if (pInfo->VisualObject.VideoObject.short_video_header)
{
quant = pInfo->VisualObject.VideoObject.VideoObjectPlaneH263.vop_quant;
nmbgob = 0;
pInfo->VisualObject.VideoObject.VideoObjectPlaneH263.gob_number = 0;
for (;;)
{
do
{
if (mp4_DecodeMCBPC_I(pInfo, &mb_type, &cbpc) != MP4_STATUS_OK)
goto Err_1;
} while (mb_type == IPPVC_MB_STUFFING);
if (mp4_DecodeCBPY_I(pInfo, &cbpy) != MP4_STATUS_OK)
goto Err_1;
if (mb_type == IPPVC_MBTYPE_INTRA_Q)
mp4_UpdateQuant(pInfo, quant);
if (mp4_DecodeIntraMB_SVH(pInfo, (cbpy << 2) + cbpc, quant, pFc, stepFc) != MP4_STATUS_OK)
goto Err_1;
colNum ++;
if (colNum == mbPerRow) {
colNum = 0;
rowNum ++;
if (rowNum == mbPerCol)
break;
pFc[0] += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYc << 4) - stepYc;
pFc[1] += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYc << 4) - stepYc;
pFc[2] += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYc << 4) - stepYc;
pFc[3] += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYc << 4) - stepYc;
pFc[4] += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCbc << 3) - stepCbc;
pFc[5] += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCrc << 3) - stepCrc;
}
else
{
pFc[0] += 16; pFc[1] += 16; pFc[2] += 16; pFc[3] += 16; pFc[4] += 8; pFc[5] += 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;
mp4_CopyMacroBlocks(pInfo->VisualObject.rFrame, pInfo->VisualObject.cFrame, mbPerRow, rowNum, colNum, (i - rowNum) * mbPerRow - colNum);
rowNum = i;
colNum = 0;
pFc[0] = pInfo->VisualObject.cFrame->pY + i * stepYc * 16; pFc[1] = pFc[0] + 8; pFc[2] = pFc[0] + 8 * stepYc; pFc[3] = pFc[2] + 8;
pFc[4] = pInfo->VisualObject.cFrame->pCb + i * stepCbc * 8; pFc[5] = pInfo->VisualObject.cFrame->pCr + i * stepCrc * 8;
}
nmbgob = 0;
}
}
mp4_AlignBits(pInfo);
return sts;
Err_1:
sts = MP4_STATUS_ERROR;
if (pInfo->stopOnErr)
return sts;
if (!mp4_SeekGOBMarker(pInfo))
{
mp4_CopyMacroBlocks(pInfo->VisualObject.rFrame, pInfo->VisualObject.cFrame, mbPerRow, rowNum, colNum, pInfo->VisualObject.VideoObject.MacroBlockPerVOP - rowNum * mbPerRow - colNum);
return sts;
}
goto ErrRet_1;
}
quant = pInfo->VisualObject.VideoObject.VideoObjectPlane.quant;
if (pInfo->VisualObject.VideoObject.sprite_enable != MP4_SPRITE_STATIC)
ippsZero_8u((uint8_t*)pInfo->VisualObject.VideoObject.MBinfo, nmb * sizeof(mp4_MacroBlock));
// decode data_partitioned I-VOP
if (pInfo->VisualObject.VideoObject.data_partitioned)
{
mp4_DataPartMacroBlock *pMBdp;
for (;;)
{
// reset Intra prediction buffer on new Video_packet
mp4_ResetIntraPredBuffer(pInfo);
mbInVideoPacket = 0;
pMBdp = &pInfo->VisualObject.VideoObject.DataPartBuff[mbCurr];
// decode mb_type/cbpc/dquant/DC part
for (;;)
{
if (mp4_DecodeMCBPC_I(pInfo, &mb_type, &cbpc) != MP4_STATUS_OK)
goto Err_2;
if (mb_type != IPPVC_MB_STUFFING)
{
if (mbInVideoPacket == nmb - mbCurr)
{
mp4_Error("DC Marker missed");
goto Err_2;
}
quantPred = quant;
if (mb_type == IPPVC_MBTYPE_INTRA_Q)
mp4_UpdateQuant(pInfo, quant);
if (mbInVideoPacket == 0)
quantPred = quant;
dcVLC = (quantPred < mp4_DC_vlc_Threshold[pInfo->VisualObject.VideoObject.VideoObjectPlane.intra_dc_vlc_thr]) ? 1 : 0;
if (dcVLC) {
for (i = 0; i < 6; i ++) {
if (ippiDecodeDCIntra_MPEG4_1u16s(&pInfo->bufptr, &pInfo->bitoff, &pMBdp->dct_dc[i], (i < 4) ? IPPVC_BLOCK_LUMA : IPPVC_BLOCK_CHROMA) != ippStsNoErr)
goto Err_2;
}
}
pMBdp->quant = (uint8_t)quant;
pMBdp->type = (uint8_t)mb_type;
pMBdp->pat = (uint8_t)cbpc;
pMBdp ++;
mbInVideoPacket ++;
}
if (mp4_ShowBits(pInfo, 19) == MP4_DC_MARKER)
{
mp4_GetBits(pInfo, 19);
break;
}
}
pMBdp = &pInfo->VisualObject.VideoObject.DataPartBuff[mbCurr];
// decode ac_pred_flag/cbpy part
for (i = 0; i < mbInVideoPacket; i ++)
{
pMBdp[i].ac_pred_flag = (uint8_t)mp4_GetBit(pInfo);
if (mp4_DecodeCBPY_I(pInfo, &cbpy) != MP4_STATUS_OK)
{
if (pInfo->stopOnErr)
goto Err_2;
for (j = i + 1; j < mbInVideoPacket; j ++)
pMBdp[j].ac_pred_flag = 1;
break;
}
pMBdp[i].pat = (uint8_t)((cbpy << 2) + pMBdp[i].pat);
}
// decode AC part and reconstruct macroblocks
for (i = 0; i < mbInVideoPacket; i ++) {
if (colNum == 0) {
// reset B-prediction blocks on new row
mp4_ResetIntraPredBblock(pInfo);
}
quant = pMBdp[i].quant;
quantPred = (i == 0) ? quant : pMBdp[i-1].quant;
dcVLC = (quantPred < mp4_DC_vlc_Threshold[pInfo->VisualObject.VideoObject.VideoObjectPlane.intra_dc_vlc_thr]) ? 1 : 0;
ac_pred_flag = pMBdp[i].ac_pred_flag;
if (mp4_DecodeIntraMB_DP(pInfo, pMBdp[i].dct_dc, colNum, pMBdp[i].pat, quant, dcVLC, ac_pred_flag, pFc, stepFc) != MP4_STATUS_OK)
//if (!pInfo->VisualObject.VideoObject.reversible_vlc)
goto Err_2;
//else
// goto Err_RVLC;
colNum ++;
if (colNum == mbPerRow)
{
colNum = 0;
rowNum ++;
if (rowNum == mbPerCol)
return sts;
pFc[0] += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYc << 4) - stepYc;
pFc[1] += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYc << 4) - stepYc;
pFc[2] += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYc << 4) - stepYc;
pFc[3] += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYc << 4) - stepYc;
pFc[4] += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCbc << 3) - stepCbc;
pFc[5] += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCrc << 3) - stepCrc;
}
else
{
pFc[0] += 16; pFc[1] += 16; pFc[2] += 16; pFc[3] += 16; pFc[4] += 8; pFc[5] += 8;
}
}
mbCurr += mbInVideoPacket;
if (!pInfo->VisualObject.VideoObject.resync_marker_disable)
{
int32_t found;
ErrRet_2:
if (mp4_CheckDecodeVideoPacket(pInfo, &found) == MP4_STATUS_OK)
{
if (found)
{
quant = pInfo->VisualObject.VideoObject.VideoObjectPlane.quant_scale;
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;
pFc[0] = pInfo->VisualObject.cFrame->pY + (rowNum * stepYc + colNum) * 16; pFc[1] = pFc[0] + 8; pFc[2] = pFc[0] + stepYc * 8; pFc[3] = pFc[2] + 8;
pFc[4] = pInfo->VisualObject.cFrame->pCb + (rowNum * stepCbc + colNum) * 8; pFc[5] = pInfo->VisualObject.cFrame->pCr + (rowNum * stepCrc + colNum) * 8;
}
else
goto Err_2;
}
else
goto Err_2;
}
}
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;
#if 0
Err_RVLC:
{
uint8_t *sBufptr = pInfo->bufptr;
int32_t sBitoff = pInfo->bitoff;
pInfo->bitoff --;
if (pInfo->bitoff == -1) {
pInfo->bitoff = 7;
pInfo->bufptr --;
}
// decode AC part and reconstruct macroblocks
for (j = mbInVideoPacket - 1; j >= i; j --) {
int32_t lnz, quantPred, dcVLC;
quantPred = ((j == 0) ? pMBdp[j].quant : pMBdp[j-1].quant);
dcVLC = (quantPred < mp4_DC_vlc_Threshold[pInfo->VisualObject.VideoObject.VideoObjectPlane.intra_dc_vlc_thr]) ? 1 : 0;
if (ippiDecodeCoeffsIntraRVLCBack_MPEG4_1u16s(&pInfo->bufptr, &pInfo->bitoff, pDCTdp[j*64*6], &lnz, dcVLC) != ippStsNoErr)
break;
}
pInfo->bufptr = sBufptr;
pInfo->bitoff = sBitoff;
}
goto ErrRet_2;
#endif
}
// decode not data partitioned I-VOP
else {
int32_t stepY = stepYc, dct_type = 0, pYoff23 = 8 * stepYc;
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);
}
if (mp4_DecodeMCBPC_I(pInfo, &mb_type, &cbpc) != MP4_STATUS_OK)
goto Err_3;
if (mb_type != IPPVC_MB_STUFFING) {
ac_pred_flag = mp4_GetBit(pInfo);
if (mp4_DecodeCBPY_I(pInfo, &cbpy) != MP4_STATUS_OK)
goto Err_3;
quantPred = quant;
if (mb_type == IPPVC_MBTYPE_INTRA_Q)
mp4_UpdateQuant(pInfo, quant);
if (mbInVideoPacket == 0)
quantPred = quant;
dcVLC = (quantPred < mp4_DC_vlc_Threshold[pInfo->VisualObject.VideoObject.VideoObjectPlane.intra_dc_vlc_thr]) ? 1 : 0;
if (pInfo->VisualObject.VideoObject.interlaced) {
dct_type = mp4_GetBit(pInfo);
if (dct_type) {
stepY = stepYc * 2;
pYoff23 = stepYc;
} else {
stepY = stepYc;
pYoff23 = 8 * stepYc;
}
stepFc[0] = stepFc[1] = stepFc[2] = stepFc[3] = stepY;
}
pFc[2] = pFc[0] + pYoff23; pFc[3] = pFc[1] + pYoff23;
if (mp4_DecodeIntraMB(pInfo, colNum, (cbpy << 2) + cbpc, quant, dcVLC, ac_pred_flag, pFc, stepFc) != MP4_STATUS_OK)
goto Err_3;
mbInVideoPacket ++;
colNum ++;
if (colNum == mbPerRow) {
colNum = 0;
rowNum ++;
if (rowNum == mbPerCol) {
// skip stuffing
while (mp4_ShowBits9(pInfo, 9) == 1)
mp4_FlushBits(pInfo, 9);
return sts;
}
pFc[0] += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYc << 4) - stepYc;
pFc[1] += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYc << 4) - stepYc;
pFc[4] += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCbc << 3) - stepCbc;
pFc[5] += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCrc << 3) - stepCrc;
} else {
pFc[0] += 16; pFc[1] += 16; pFc[4] += 8; pFc[5] += 8;
}
}
if (!pInfo->VisualObject.VideoObject.resync_marker_disable)
{
int32_t found;
ErrRet_3:
if (mp4_CheckDecodeVideoPacket(pInfo, &found) == MP4_STATUS_OK)
{
if (found)
{
quant = pInfo->VisualObject.VideoObject.VideoObjectPlane.quant_scale;
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;
pFc[0] = pInfo->VisualObject.cFrame->pY + (rowNum * stepYc + colNum) * 16; pFc[1] = pFc[0] + 8;
pFc[4] = pInfo->VisualObject.cFrame->pCb + (rowNum * stepCbc + colNum) * 8; pFc[5] = pInfo->VisualObject.cFrame->pCr + (rowNum * stepCrc + colNum) * 8;
break;
}
}
else
goto Err_3;
}
}
}
Err_3:
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_3;
}
}
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