ref: 4b5e893fcc54ca46cab4335ed98a75ecf41fd3fc
dir: /codec/decoder/core/src/decode_slice.cpp/
/*!
* \copy
* Copyright (c) 2008-2013, Cisco Systems
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*
* Abstract
* current slice decoding
*
* History
* 07/10/2008 Created
* 08/09/2013 Modified
*
*****************************************************************************/
#include "deblocking.h"
#include "decode_slice.h"
#include "parse_mb_syn_cavlc.h"
#include "rec_mb.h"
#include "mv_pred.h"
#include "cpu_core.h"
namespace WelsDec {
int32_t WelsTargetSliceConstruction (PWelsDecoderContext pCtx) {
PDqLayer pCurLayer = pCtx->pCurDqLayer;
PSlice pCurSlice = &pCurLayer->sLayerInfo.sSliceInLayer;
PSliceHeader pSliceHeader = &pCurSlice->sSliceHeaderExt.sSliceHeader;
int32_t iTotalMbTargetLayer = pSliceHeader->pSps->uiTotalMbCount;
int32_t iCurLayerWidth = pCurLayer->iMbWidth << 4;
int32_t iCurLayerHeight = pCurLayer->iMbHeight << 4;
int32_t iNextMbXyIndex = 0;
PFmo pFmo = pCtx->pFmo;
int32_t iTotalNumMb = pCurSlice->iTotalMbInCurSlice;
int32_t iCountNumMb = 0;
PDeblockingFilterMbFunc pDeblockMb;
if (!pCtx->bAvcBasedFlag && iCurLayerWidth != pCtx->iCurSeqIntervalMaxPicWidth) {
return -1;
}
iNextMbXyIndex = pSliceHeader->iFirstMbInSlice;
pCurLayer->iMbX = iNextMbXyIndex % pCurLayer->iMbWidth;
pCurLayer->iMbY = iNextMbXyIndex / pCurLayer->iMbWidth;
pCurLayer->iMbXyIndex = iNextMbXyIndex;
if (0 == iNextMbXyIndex) {
pCurLayer->pDec->iSpsId = pSliceHeader->iSpsId;
pCurLayer->pDec->iPpsId = pSliceHeader->iPpsId;
pCurLayer->pDec->uiQualityId = pCurLayer->sLayerInfo.sNalHeaderExt.uiQualityId;
}
do {
if (iCountNumMb >= iTotalNumMb) {
break;
}
if (WelsTargetMbConstruction (pCtx)) {
WelsLog (& (pCtx->sLogCtx), WELS_LOG_WARNING,
"WelsTargetSliceConstruction():::MB(%d, %d) construction error. pCurSlice_type:%d\n",
pCurLayer->iMbX, pCurLayer->iMbY, pCurSlice->eSliceType);
return -1;
}
++iCountNumMb;
if (!pCurLayer->pMbCorrectlyDecodedFlag[iNextMbXyIndex]) { //already con-ed, overwrite
pCurLayer->pMbCorrectlyDecodedFlag[iNextMbXyIndex] = true;
++pCtx->iTotalNumMbRec;
}
if (pCtx->iTotalNumMbRec > iTotalMbTargetLayer) {
WelsLog (& (pCtx->sLogCtx), WELS_LOG_WARNING,
"WelsTargetSliceConstruction():::pCtx->iTotalNumMbRec:%d, iTotalMbTargetLayer:%d\n",
pCtx->iTotalNumMbRec, iTotalMbTargetLayer);
return -1;
}
if (pSliceHeader->pPps->uiNumSliceGroups > 1) {
iNextMbXyIndex = FmoNextMb (pFmo, iNextMbXyIndex);
} else {
++iNextMbXyIndex;
}
if (-1 == iNextMbXyIndex || iNextMbXyIndex >= iTotalMbTargetLayer) { // slice group boundary or end of a frame
break;
}
pCurLayer->iMbX = iNextMbXyIndex % pCurLayer->iMbWidth;
pCurLayer->iMbY = iNextMbXyIndex / pCurLayer->iMbWidth;
pCurLayer->iMbXyIndex = iNextMbXyIndex;
} while (1);
pCtx->pDec->iWidthInPixel = iCurLayerWidth;
pCtx->pDec->iHeightInPixel = iCurLayerHeight;
if ((pCurSlice->eSliceType != I_SLICE) && (pCurSlice->eSliceType != P_SLICE))
return 0;
pDeblockMb = WelsDeblockingMb;
if (1 == pSliceHeader->uiDisableDeblockingFilterIdc) {
return 0;//NO_SUPPORTED_FILTER_IDX
} else {
WelsDeblockingFilterSlice (pCtx, pDeblockMb);
}
// any other filter_idc not supported here, 7/22/2010
return 0;
}
int32_t WelsMbInterSampleConstruction (PWelsDecoderContext pCtx, PDqLayer pCurLayer,
uint8_t* pDstY, uint8_t* pDstU, uint8_t* pDstV, int32_t iStrideL, int32_t iStrideC) {
int32_t iMbXy = pCurLayer->iMbXyIndex;
int32_t i, iIndex, iOffset;
WelsChromaDcIdct (pCurLayer->pScaledTCoeff[iMbXy] + 256); // 256 = 16*16
WelsChromaDcIdct (pCurLayer->pScaledTCoeff[iMbXy] + 320); // 320 = 16*16 + 16*4
for (i = 0; i < 16; i++) { //luma
iIndex = g_kuiMbCountScan4Idx[i];
if (pCurLayer->pNzc[iMbXy][iIndex]) {
iOffset = ((iIndex >> 2) << 2) * iStrideL + ((iIndex % 4) << 2);
pCtx->pIdctResAddPredFunc (pDstY + iOffset, iStrideL, pCurLayer->pScaledTCoeff[iMbXy] + (i << 4));
}
}
for (i = 0; i < 4; i++) { //chroma
iIndex = g_kuiMbCountScan4Idx[i + 16]; //Cb
if (pCurLayer->pNzc[iMbXy][iIndex] || * (pCurLayer->pScaledTCoeff[iMbXy] + ((i + 16) << 4))) {
iOffset = (((iIndex - 16) >> 2) << 2) * iStrideC + (((iIndex - 16) % 4) << 2);
pCtx->pIdctResAddPredFunc (pDstU + iOffset, iStrideC, pCurLayer->pScaledTCoeff[iMbXy] + ((i + 16) << 4));
}
iIndex = g_kuiMbCountScan4Idx[i + 20]; //Cr
if (pCurLayer->pNzc[iMbXy][iIndex] || * (pCurLayer->pScaledTCoeff[iMbXy] + ((i + 20) << 4))) {
iOffset = (((iIndex - 18) >> 2) << 2) * iStrideC + (((iIndex - 18) % 4) << 2);
pCtx->pIdctResAddPredFunc (pDstV + iOffset, iStrideC , pCurLayer->pScaledTCoeff[iMbXy] + ((i + 20) << 4));
}
}
return 0;
}
int32_t WelsMbInterConstruction (PWelsDecoderContext pCtx, PDqLayer pCurLayer) {
int32_t iMbX = pCurLayer->iMbX;
int32_t iMbY = pCurLayer->iMbY;
uint8_t* pDstY, *pDstCb, *pDstCr;
int32_t iLumaStride = pCtx->pDec->iLinesize[0];
int32_t iChromaStride = pCtx->pDec->iLinesize[1];
pDstY = pCurLayer->pDec->pData[0] + ((iMbY * iLumaStride + iMbX) << 4);
pDstCb = pCurLayer->pDec->pData[1] + ((iMbY * iChromaStride + iMbX) << 3);
pDstCr = pCurLayer->pDec->pData[2] + ((iMbY * iChromaStride + iMbX) << 3);
GetInterPred (pDstY, pDstCb, pDstCr, pCtx);
WelsMbInterSampleConstruction (pCtx, pCurLayer, pDstY, pDstCb, pDstCr, iLumaStride, iChromaStride);
pCtx->sBlockFunc.pWelsSetNonZeroCountFunc (
pCurLayer->pNzc[pCurLayer->iMbXyIndex]); // set all none-zero nzc to 1; dbk can be opti!
return 0;
}
void WelsLumaDcDequantIdct (int16_t* pBlock, int32_t iQp) {
const int32_t kiQMul = g_kuiDequantCoeff[iQp][0];
#define STRIDE 16
int32_t i;
int32_t iTemp[16]; //FIXME check if this is a good idea
int16_t* pBlk = pBlock;
static const int32_t kiXOffset[4] = {0, STRIDE, STRIDE << 2, 5 * STRIDE};
static const int32_t kiYOffset[4] = {0, STRIDE << 1, STRIDE << 3, 10 * STRIDE};
for (i = 0; i < 4; i++) {
const int32_t kiOffset = kiYOffset[i];
const int32_t kiX1 = kiOffset + kiXOffset[2];
const int32_t kiX2 = STRIDE + kiOffset;
const int32_t kiX3 = kiOffset + kiXOffset[3];
const int32_t kiI4 = i << 2; // 4*i
const int32_t kiZ0 = pBlk[kiOffset] + pBlk[kiX1];
const int32_t kiZ1 = pBlk[kiOffset] - pBlk[kiX1];
const int32_t kiZ2 = pBlk[kiX2] - pBlk[kiX3];
const int32_t kiZ3 = pBlk[kiX2] + pBlk[kiX3];
iTemp[kiI4] = kiZ0 + kiZ3;
iTemp[1 + kiI4] = kiZ1 + kiZ2;
iTemp[2 + kiI4] = kiZ1 - kiZ2;
iTemp[3 + kiI4] = kiZ0 - kiZ3;
}
for (i = 0; i < 4; i++) {
const int32_t kiOffset = kiXOffset[i];
const int32_t kiI4 = 4 + i;
const int32_t kiZ0 = iTemp[i] + iTemp[4 + kiI4];
const int32_t kiZ1 = iTemp[i] - iTemp[4 + kiI4];
const int32_t kiZ2 = iTemp[kiI4] - iTemp[8 + kiI4];
const int32_t kiZ3 = iTemp[kiI4] + iTemp[8 + kiI4];
pBlk[kiOffset] = ((kiZ0 + kiZ3) * kiQMul + 2) >> 2; //FIXME think about merging this into decode_resdual
pBlk[kiYOffset[1] + kiOffset] = ((kiZ1 + kiZ2) * kiQMul + 2) >> 2;
pBlk[kiYOffset[2] + kiOffset] = ((kiZ1 - kiZ2) * kiQMul + 2) >> 2;
pBlk[kiYOffset[3] + kiOffset] = ((kiZ0 - kiZ3) * kiQMul + 2) >> 2;
}
#undef STRIDE
}
int32_t WelsMbIntraPredictionConstruction (PWelsDecoderContext pCtx, PDqLayer pCurLayer, bool bOutput) {
//seems IPCM should not enter this path
int32_t iMbXy = pCurLayer->iMbXyIndex;
WelsFillRecNeededMbInfo (pCtx, bOutput, pCurLayer);
if (IS_INTRA16x16 (pCurLayer->pMbType[iMbXy])) {
WelsLumaDcDequantIdct (pCurLayer->pScaledTCoeff[iMbXy], pCurLayer->pLumaQp[iMbXy]);
RecI16x16Mb (iMbXy, pCtx, pCurLayer->pScaledTCoeff[iMbXy], pCurLayer);
return 0;
}
if (IS_INTRA4x4 (pCurLayer->pMbType[iMbXy]))
RecI4x4Mb (iMbXy, pCtx, pCurLayer->pScaledTCoeff[iMbXy], pCurLayer);
return 0;
}
int32_t WelsMbInterPrediction (PWelsDecoderContext pCtx, PDqLayer pCurLayer) {
int32_t iMbX = pCurLayer->iMbX;
int32_t iMbY = pCurLayer->iMbY;
uint8_t* pDstY, *pDstCb, *pDstCr;
int32_t iLumaStride = pCtx->pDec->iLinesize[0];
int32_t iChromaStride = pCtx->pDec->iLinesize[1];
pDstY = pCurLayer->pDec->pData[0] + ((iMbY * iLumaStride + iMbX) << 4);
pDstCb = pCurLayer->pDec->pData[1] + ((iMbY * iChromaStride + iMbX) << 3);
pDstCr = pCurLayer->pDec->pData[2] + ((iMbY * iChromaStride + iMbX) << 3);
GetInterPred (pDstY, pDstCb, pDstCr, pCtx);
return 0;
}
int32_t WelsTargetMbConstruction (PWelsDecoderContext pCtx) {
PDqLayer pCurLayer = pCtx->pCurDqLayer;
if (MB_TYPE_INTRA_PCM == pCurLayer->pMbType[pCurLayer->iMbXyIndex]) {
//already decoded and reconstructed when parsing
return 0;
} else if (IS_INTRA (pCurLayer->pMbType[pCurLayer->iMbXyIndex])) {
WelsMbIntraPredictionConstruction (pCtx, pCurLayer, 1);
} else if (IS_INTER (pCurLayer->pMbType[pCurLayer->iMbXyIndex])) { //InterMB
if (0 == pCurLayer->pCbp[pCurLayer->iMbXyIndex]) { //uiCbp==0 include SKIP
WelsMbInterPrediction (pCtx, pCurLayer);
} else {
WelsMbInterConstruction (pCtx, pCurLayer);
}
} else {
WelsLog (& (pCtx->sLogCtx), WELS_LOG_WARNING, "WelsTargetMbConstruction():::::Unknown MB type: %d\n",
pCurLayer->pMbType[pCurLayer->iMbXyIndex]);
return -1;
}
return 0;
}
void WelsChromaDcIdct (int16_t* pBlock) {
int32_t iStride = 32;
int32_t iXStride = 16;
int32_t iStride1 = iXStride + iStride;
int16_t* pBlk = pBlock;
int32_t iA, iB, iC, iD, iE;
iA = pBlk[0];
iB = pBlk[iXStride];
iC = pBlk[iStride];
iD = pBlk[iStride1];
iE = iA - iB;
iA += iB;
iB = iC - iD;
iC += iD;
pBlk[0] = (iA + iC) >> 1;
pBlk[iXStride] = (iE + iB) >> 1;
pBlk[iStride] = (iA - iC) >> 1;
pBlk[iStride1] = (iE - iB) >> 1;
}
int32_t WelsDecodeSlice (PWelsDecoderContext pCtx, bool bFirstSliceInLayer, PNalUnit pNalCur) {
PDqLayer pCurLayer = pCtx->pCurDqLayer;
PFmo pFmo = pCtx->pFmo;
int32_t i, iRet;
int32_t iNextMbXyIndex, iSliceIdc;
PSlice pSlice = &pCurLayer->sLayerInfo.sSliceInLayer;
PSliceHeaderExt pSliceHeaderExt = &pSlice->sSliceHeaderExt;
PSliceHeader pSliceHeader = &pSliceHeaderExt->sSliceHeader;
int32_t iMbX, iMbY;
const int32_t kiCountNumMb = pSliceHeader->pSps->uiTotalMbCount; //need to be correct when fmo or multi slice
PBitStringAux pBs = pCurLayer->pBitStringAux;
intX_t iUsedBits = 0;
PWelsDecMbCavlcFunc pDecMbCavlcFunc;
pSlice->iTotalMbInCurSlice = 0; //initialize at the starting of slice decoding.
if (P_SLICE == pSliceHeader->eSliceType) {
pDecMbCavlcFunc = WelsDecodeMbCavlcPSlice;
} else { //I_SLICE
pDecMbCavlcFunc = WelsDecodeMbCavlcISlice;
}
if (pSliceHeader->pPps->bConstainedIntraPredFlag) {
pCtx->pFillInfoCacheIntra4x4Func = WelsFillCacheConstrain1Intra4x4;
pCtx->pParseIntra4x4ModeFunc = ParseIntra4x4ModeConstrain1;
pCtx->pParseIntra16x16ModeFunc = ParseIntra16x16ModeConstrain1;
} else {
pCtx->pFillInfoCacheIntra4x4Func = WelsFillCacheConstrain0Intra4x4;
pCtx->pParseIntra4x4ModeFunc = ParseIntra4x4ModeConstrain0;
pCtx->pParseIntra16x16ModeFunc = ParseIntra16x16ModeConstrain0;
}
pCtx->eSliceType = pSliceHeader->eSliceType;
if (pCurLayer->sLayerInfo.pPps->bEntropyCodingModeFlag == 1) {
//CABAC encoding is unsupported yet!
return -1;
}
iNextMbXyIndex = pSliceHeader->iFirstMbInSlice;
iMbX = iNextMbXyIndex % pCurLayer->iMbWidth;
iMbY = iNextMbXyIndex / pCurLayer->iMbWidth; // error is introduced by multiple slices case, 11/23/2009
pSlice->iMbSkipRun = -1;
iSliceIdc = (pSliceHeader->iFirstMbInSlice << 7) + pCurLayer->uiLayerDqId;
pCurLayer->iMbX = iMbX;
pCurLayer->iMbY = iMbY;
pCurLayer->iMbXyIndex = iNextMbXyIndex;
if (pSliceHeaderExt->bSliceSkipFlag == 1) {
for (i = 0; i < (int32_t)pSliceHeaderExt->uiNumMbsInSlice; i++) {
pCurLayer->pSliceIdc[iNextMbXyIndex] = iSliceIdc;
pCurLayer->pResidualPredFlag[iNextMbXyIndex] = 1;
if (pSliceHeaderExt->sSliceHeader.pPps->uiNumSliceGroups > 1) {
iNextMbXyIndex = FmoNextMb (pFmo, iNextMbXyIndex);
} else {
++iNextMbXyIndex;
}
iMbX = iNextMbXyIndex % pCurLayer->iMbWidth;
iMbY = iNextMbXyIndex % pCurLayer->iMbHeight;
pCurLayer->iMbX = iMbX;
pCurLayer->iMbY = iMbY;
pCurLayer->iMbXyIndex = iNextMbXyIndex;
}
return 0;
}
do {
if ((-1 == iNextMbXyIndex) || (iNextMbXyIndex >= kiCountNumMb)) { // slice group boundary or end of a frame
break;
}
pCurLayer->pSliceIdc[iNextMbXyIndex] = iSliceIdc;
iRet = pDecMbCavlcFunc (pCtx, pNalCur);
if (iRet != ERR_NONE) {
return iRet;
}
++pSlice->iTotalMbInCurSlice;
if (pSliceHeader->pPps->uiNumSliceGroups > 1) {
iNextMbXyIndex = FmoNextMb (pFmo, iNextMbXyIndex);
} else {
++iNextMbXyIndex;
}
// check whether there is left bits to read next time in case multiple slices
iUsedBits = ((pBs->pCurBuf - pBs->pStartBuf) << 3) - (16 - pBs->iLeftBits);
if (iUsedBits == pBs->iBits && 0 >= pCurLayer->sLayerInfo.sSliceInLayer.iMbSkipRun) { // slice boundary
break;
}
if (iUsedBits > pBs->iBits) { //When BS incomplete, as long as find it, SHOULD stop decoding to avoid mosaic or crash.
WelsLog (& (pCtx->sLogCtx), WELS_LOG_WARNING,
"WelsDecodeSlice()::::pBs incomplete, iUsedBits:%"PRId64" > pBs->iBits:%d, MUST stop decoding.\n",
(int64_t) iUsedBits, pBs->iBits);
return -1;
}
iMbX = iNextMbXyIndex % pCurLayer->iMbWidth;
iMbY = iNextMbXyIndex / pCurLayer->iMbWidth;
pCurLayer->iMbX = iMbX;
pCurLayer->iMbY = iMbY;
pCurLayer->iMbXyIndex = iNextMbXyIndex;
} while (1);
return ERR_NONE;
}
int32_t WelsActualDecodeMbCavlcISlice (PWelsDecoderContext pCtx) {
SVlcTable* pVlcTable = &pCtx->sVlcTable;
PDqLayer pCurLayer = pCtx->pCurDqLayer;
PBitStringAux pBs = pCurLayer->pBitStringAux;
PSlice pSlice = &pCurLayer->sLayerInfo.sSliceInLayer;
PSliceHeader pSliceHeader = &pSlice->sSliceHeaderExt.sSliceHeader;
SNeighAvail sNeighAvail;
int32_t iScanIdxStart = pSlice->sSliceHeaderExt.uiScanIdxStart;
int32_t iScanIdxEnd = pSlice->sSliceHeaderExt.uiScanIdxEnd;
int32_t iMbX = pCurLayer->iMbX;
int32_t iMbY = pCurLayer->iMbY;
const int32_t iMbXy = pCurLayer->iMbXyIndex;
int8_t* pNzc = pCurLayer->pNzc[iMbXy];
int32_t i;
uint32_t uiMbType = 0, uiCbp = 0, uiCbpL = 0, uiCbpC = 0;
uint32_t uiCode;
int32_t iCode;
ENFORCE_STACK_ALIGN_1D (uint8_t, pNonZeroCount, 48, 16);
pCurLayer->pInterPredictionDoneFlag[iMbXy] = 0;
pCurLayer->pResidualPredFlag[iMbXy] = pSlice->sSliceHeaderExt.bDefaultResidualPredFlag;
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //mb_type
uiMbType = uiCode;
if (uiMbType > 25) {
return ERR_INFO_INVALID_MB_TYPE;
}
if (25 == uiMbType) {
int32_t iDecStrideL = pCurLayer->pDec->iLinesize[0];
int32_t iDecStrideC = pCurLayer->pDec->iLinesize[1];
int32_t iOffsetL = (iMbX + iMbY * iDecStrideL) << 4;
int32_t iOffsetC = (iMbX + iMbY * iDecStrideC) << 3;
uint8_t* pDecY = pCurLayer->pDec->pData[0] + iOffsetL;
uint8_t* pDecU = pCurLayer->pDec->pData[1] + iOffsetC;
uint8_t* pDecV = pCurLayer->pDec->pData[2] + iOffsetC;
uint8_t* pTmpBsBuf;
int32_t i;
int32_t iCopySizeY = (sizeof (uint8_t) << 4);
int32_t iCopySizeUV = (sizeof (uint8_t) << 3);
int32_t iIndex = ((-pBs->iLeftBits) >> 3) + 2;
pCurLayer->pMbType[iMbXy] = MB_TYPE_INTRA_PCM;
//step 1: locating bit-stream pointer [must align into integer byte]
pBs->pCurBuf -= iIndex;
//step 2: copy pixel from bit-stream into fdec [reconstruction]
pTmpBsBuf = pBs->pCurBuf;
for (i = 0; i < 16; i++) { //luma
memcpy (pDecY , pTmpBsBuf, iCopySizeY);
pDecY += iDecStrideL;
pTmpBsBuf += 16;
}
for (i = 0; i < 8; i++) { //cb
memcpy (pDecU, pTmpBsBuf, iCopySizeUV);
pDecU += iDecStrideC;
pTmpBsBuf += 8;
}
for (i = 0; i < 8; i++) { //cr
memcpy (pDecV, pTmpBsBuf, iCopySizeUV);
pDecV += iDecStrideC;
pTmpBsBuf += 8;
}
pBs->pCurBuf += 384;
InitReadBits (pBs);
//step 3: update QP and pNonZeroCount
pCurLayer->pLumaQp[iMbXy] = 0;
pCurLayer->pChromaQp[iMbXy] = 0;
memset (pNzc, 16, sizeof (pCurLayer->pNzc[iMbXy])); //Rec. 9.2.1 for PCM, nzc=16
return 0;
} else if (0 == uiMbType) { //reference to JM
ENFORCE_STACK_ALIGN_1D (int8_t, pIntraPredMode, 48, 16);
pCurLayer->pMbType[iMbXy] = MB_TYPE_INTRA4x4;
pCtx->pFillInfoCacheIntra4x4Func (&sNeighAvail, pNonZeroCount, pIntraPredMode, pCurLayer);
if (pCtx->pParseIntra4x4ModeFunc (&sNeighAvail, pIntraPredMode, pBs, pCurLayer)) {
return -1;
}
//uiCbp
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //coded_block_pattern
uiCbp = uiCode;
//G.9.1 Alternative parsing process for coded pBlock pattern
if (uiCbp > 47)
return ERR_INFO_INVALID_CBP;
uiCbp = g_kuiIntra4x4CbpTable[uiCbp];
pCurLayer->pCbp[iMbXy] = uiCbp;
uiCbpC = uiCbp >> 4;
uiCbpL = uiCbp & 15;
} else { //I_PCM exclude, we can ignore it
pCurLayer->pMbType[iMbXy] = MB_TYPE_INTRA16x16;
pCurLayer->pIntraPredMode[iMbXy][7] = (uiMbType - 1) & 3;
pCurLayer->pCbp[iMbXy] = g_kuiI16CbpTable[ (uiMbType - 1) >> 2];
uiCbpC = pCurLayer->pCbp[iMbXy] >> 4;
uiCbpL = pCurLayer->pCbp[iMbXy] & 15;
WelsFillCacheNonZeroCount (&sNeighAvail, pNonZeroCount, pCurLayer);
if (pCtx->pParseIntra16x16ModeFunc (&sNeighAvail, pBs, pCurLayer)) {
return -1;
}
}
memset (pCurLayer->pScaledTCoeff[iMbXy], 0, 384 * sizeof (pCurLayer->pScaledTCoeff[iMbXy][0]));
ST32A4 (&pNzc[0], 0);
ST32A4 (&pNzc[4], 0);
ST32A4 (&pNzc[8], 0);
ST32A4 (&pNzc[12], 0);
ST32A4 (&pNzc[16], 0);
ST32A4 (&pNzc[20], 0);
if (pCurLayer->pCbp[iMbXy] == 0 && IS_INTRA4x4 (pCurLayer->pMbType[iMbXy])) {
pCurLayer->pLumaQp[iMbXy] = pSlice->iLastMbQp;
pCurLayer->pChromaQp[iMbXy] = g_kuiChromaQpTable[WELS_CLIP3 (pCurLayer->pLumaQp[iMbXy] +
pSliceHeader->pPps->iChromaQpIndexOffset, 0, 51)];
}
if (pCurLayer->pCbp[iMbXy] || MB_TYPE_INTRA16x16 == pCurLayer->pMbType[iMbXy]) {
int32_t iQpDelta, iId8x8, iId4x4;
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //mb_qp_delta
iQpDelta = iCode;
if (iQpDelta > 25 || iQpDelta < -26) { //out of iQpDelta range
return ERR_INFO_INVALID_QP;
}
pCurLayer->pLumaQp[iMbXy] = pSlice->iLastMbQp + iQpDelta; //update iLastMbQp
//refer to JVT-X201wcm1.doc equation(7-35)
if ((unsigned) (pCurLayer->pLumaQp[iMbXy]) > 51) {
if (pCurLayer->pLumaQp[iMbXy] < 0) {
pCurLayer->pLumaQp[iMbXy] += 52;
} else {
pCurLayer->pLumaQp[iMbXy] -= 52;
}
}
//QP should be in the range of [0, 51]
if (pCurLayer->pLumaQp[iMbXy] < 0 || pCurLayer->pLumaQp[iMbXy] > 51) {
return ERR_INFO_INVALID_QP;
}
pSlice->iLastMbQp = pCurLayer->pLumaQp[iMbXy];
pCurLayer->pChromaQp[iMbXy] = g_kuiChromaQpTable[WELS_CLIP3 (pSlice->iLastMbQp +
pSliceHeader->pPps->iChromaQpIndexOffset, 0,
51)];
BsStartCavlc (pBs);
if (MB_TYPE_INTRA16x16 == pCurLayer->pMbType[iMbXy]) {
//step1: Luma DC
if (WelsResidualBlockCavlc (pVlcTable, pNonZeroCount, pBs, 0, 16,
g_kuiLumaDcZigzagScan, I16_LUMA_DC, pCurLayer->pScaledTCoeff[iMbXy], pCurLayer->pLumaQp[iMbXy], pCtx)) {
return -1;//abnormal
}
//step2: Luma AC
if (uiCbpL) {
for (i = 0; i < 16; i++) {
if (WelsResidualBlockCavlc (pVlcTable, pNonZeroCount, pBs, i,
iScanIdxEnd - WELS_MAX (iScanIdxStart, 1) + 1, g_kuiZigzagScan + WELS_MAX (iScanIdxStart, 1),
I16_LUMA_AC, pCurLayer->pScaledTCoeff[iMbXy] + (i << 4), pCurLayer->pLumaQp[iMbXy], pCtx)) {
return -1;//abnormal
}
}
ST32A4 (&pNzc[0], LD32 (&pNonZeroCount[1 + 8 * 1]));
ST32A4 (&pNzc[4], LD32 (&pNonZeroCount[1 + 8 * 2]));
ST32A4 (&pNzc[8], LD32 (&pNonZeroCount[1 + 8 * 3]));
ST32A4 (&pNzc[12], LD32 (&pNonZeroCount[1 + 8 * 4]));
}
} else { //non-MB_TYPE_INTRA16x16
for (iId8x8 = 0; iId8x8 < 4; iId8x8++) {
if (uiCbpL & (1 << iId8x8)) {
int32_t iIndex = (iId8x8 << 2);
for (iId4x4 = 0; iId4x4 < 4; iId4x4++) {
//Luma (DC and AC decoding together)
if (WelsResidualBlockCavlc (pVlcTable, pNonZeroCount, pBs, iIndex,
iScanIdxEnd - iScanIdxStart + 1, g_kuiZigzagScan + iScanIdxStart,
LUMA_DC_AC, pCurLayer->pScaledTCoeff[iMbXy] + (iIndex << 4), pCurLayer->pLumaQp[iMbXy], pCtx)) {
return -1;//abnormal
}
iIndex++;
}
} else {
ST16 (&pNonZeroCount[g_kuiCache48CountScan4Idx[ (iId8x8 << 2)]], 0);
ST16 (&pNonZeroCount[g_kuiCache48CountScan4Idx[ (iId8x8 << 2) + 2]], 0);
}
}
ST32A4 (&pNzc[0], LD32 (&pNonZeroCount[1 + 8 * 1]));
ST32A4 (&pNzc[4], LD32 (&pNonZeroCount[1 + 8 * 2]));
ST32A4 (&pNzc[8], LD32 (&pNonZeroCount[1 + 8 * 3]));
ST32A4 (&pNzc[12], LD32 (&pNonZeroCount[1 + 8 * 4]));
}
//chroma
//step1: DC
if (1 == uiCbpC || 2 == uiCbpC) {
for (i = 0; i < 2; i++) { //Cb Cr
if (WelsResidualBlockCavlc (pVlcTable, pNonZeroCount, pBs,
16 + (i << 2), 4, g_kuiChromaDcScan, CHROMA_DC, pCurLayer->pScaledTCoeff[iMbXy] + 256 + (i << 6),
pCurLayer->pChromaQp[iMbXy], pCtx)) {
return -1;//abnormal
}
}
}
//step2: AC
if (2 == uiCbpC) {
for (i = 0; i < 2; i++) { //Cb Cr
int32_t iIndex = 16 + (i << 2);
for (iId4x4 = 0; iId4x4 < 4; iId4x4++) {
if (WelsResidualBlockCavlc (pVlcTable, pNonZeroCount, pBs, iIndex,
iScanIdxEnd - WELS_MAX (iScanIdxStart, 1) + 1, g_kuiZigzagScan + WELS_MAX (iScanIdxStart, 1),
CHROMA_AC, pCurLayer->pScaledTCoeff[iMbXy] + (iIndex << 4), pCurLayer->pChromaQp[iMbXy], pCtx)) {
return -1;//abnormal
}
iIndex++;
}
}
ST16A2 (&pNzc[16], LD16A2 (&pNonZeroCount[6 + 8 * 1]));
ST16A2 (&pNzc[20], LD16A2 (&pNonZeroCount[6 + 8 * 2]));
ST16A2 (&pNzc[18], LD16A2 (&pNonZeroCount[6 + 8 * 4]));
ST16A2 (&pNzc[22], LD16A2 (&pNonZeroCount[6 + 8 * 5]));
}
BsEndCavlc (pBs);
}
return 0;
}
int32_t WelsDecodeMbCavlcISlice (PWelsDecoderContext pCtx, PNalUnit pNalCur) {
PDqLayer pCurLayer = pCtx->pCurDqLayer;
PBitStringAux pBs = pCurLayer->pBitStringAux;
PSliceHeaderExt pSliceHeaderExt = &pCurLayer->sLayerInfo.sSliceInLayer.sSliceHeaderExt;
int32_t iBaseModeFlag;
int32_t iRet = 0; //should have the return value to indicate decoding error or not, It's NECESSARY--2010.4.15
uint32_t uiCode;
if (pSliceHeaderExt->bAdaptiveBaseModeFlag == 1) {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //base_mode_flag
iBaseModeFlag = uiCode;
} else {
iBaseModeFlag = pSliceHeaderExt->bDefaultBaseModeFlag;
}
if (!iBaseModeFlag) {
iRet = WelsActualDecodeMbCavlcISlice (pCtx);
} else {
WelsLog (& (pCtx->sLogCtx), WELS_LOG_WARNING, "iBaseModeFlag (%d) != 0, inter-layer prediction not supported.\n",
iBaseModeFlag);
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_UNSUPPORTED_ILP);
}
if (iRet) { //occur error when parsing, MUST STOP decoding
return iRet;
}
return 0;
}
int32_t WelsActualDecodeMbCavlcPSlice (PWelsDecoderContext pCtx) {
SVlcTable* pVlcTable = &pCtx->sVlcTable;
PDqLayer pCurLayer = pCtx->pCurDqLayer;
PBitStringAux pBs = pCurLayer->pBitStringAux;
PSlice pSlice = &pCurLayer->sLayerInfo.sSliceInLayer;
PSliceHeader pSliceHeader = &pSlice->sSliceHeaderExt.sSliceHeader;
SNeighAvail sNeighAvail;
int32_t iScanIdxStart = pSlice->sSliceHeaderExt.uiScanIdxStart;
int32_t iScanIdxEnd = pSlice->sSliceHeaderExt.uiScanIdxEnd;
int32_t iMbX = pCurLayer->iMbX;
int32_t iMbY = pCurLayer->iMbY;
const int32_t iMbXy = pCurLayer->iMbXyIndex;
int8_t* pNzc = pCurLayer->pNzc[iMbXy];
int32_t i;
uint32_t uiMbType = 0, uiCbp = 0, uiCbpL = 0, uiCbpC = 0;
uint32_t uiCode;
int32_t iCode;
ENFORCE_STACK_ALIGN_1D (uint8_t, pNonZeroCount, 48, 16);
pCurLayer->pInterPredictionDoneFlag[iMbXy] = 0;//2009.10.23
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //mb_type
uiMbType = uiCode;
if (uiMbType < 5) { //inter MB type
int16_t iMotionVector[LIST_A][30][MV_A];
int8_t iRefIndex[LIST_A][30];
pCurLayer->pMbType[iMbXy] = g_ksInterMbTypeInfo[uiMbType].iType;
WelsFillCacheInter (&sNeighAvail, pNonZeroCount, iMotionVector, iRefIndex, pCurLayer);
if (ParseInterInfo (pCtx, iMotionVector, iRefIndex, pBs)) {
return -1;//abnormal
}
if (pSlice->sSliceHeaderExt.bAdaptiveResidualPredFlag == 1) {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //residual_prediction_flag
pCurLayer->pResidualPredFlag[iMbXy] = uiCode;
} else {
pCurLayer->pResidualPredFlag[iMbXy] = pSlice->sSliceHeaderExt.bDefaultResidualPredFlag;
}
if (pCurLayer->pResidualPredFlag[iMbXy] == 0) {
pCurLayer->pInterPredictionDoneFlag[iMbXy] = 0;
} else {
WelsLog (& (pCtx->sLogCtx), WELS_LOG_WARNING, "residual_pred_flag = 1 not supported.\n");
return -1;
}
} else { //intra MB type
uiMbType -= 5;
if (uiMbType > 25) {
return ERR_INFO_INVALID_MB_TYPE;
}
if (25 == uiMbType) {
int32_t iDecStrideL = pCurLayer->pDec->iLinesize[0];
int32_t iDecStrideC = pCurLayer->pDec->iLinesize[1];
int32_t iOffsetL = (iMbX + iMbY * iDecStrideL) << 4;
int32_t iOffsetC = (iMbX + iMbY * iDecStrideC) << 3;
uint8_t* pDecY = pCurLayer->pDec->pData[0] + iOffsetL;
uint8_t* pDecU = pCurLayer->pDec->pData[1] + iOffsetC;
uint8_t* pDecV = pCurLayer->pDec->pData[2] + iOffsetC;
uint8_t* pTmpBsBuf;
int32_t i;
int32_t iCopySizeY = (sizeof (uint8_t) << 4);
int32_t iCopySizeUV = (sizeof (uint8_t) << 3);
int32_t iIndex = ((-pBs->iLeftBits) >> 3) + 2;
pCurLayer->pMbType[iMbXy] = MB_TYPE_INTRA_PCM;
//step 1: locating bit-stream pointer [must align into integer byte]
pBs->pCurBuf -= iIndex;
//step 2: copy pixel from bit-stream into fdec [reconstruction]
pTmpBsBuf = pBs->pCurBuf;
for (i = 0; i < 16; i++) { //luma
memcpy (pDecY , pTmpBsBuf, iCopySizeY);
pDecY += iDecStrideL;
pTmpBsBuf += 16;
}
for (i = 0; i < 8; i++) { //cb
memcpy (pDecU, pTmpBsBuf, iCopySizeUV);
pDecU += iDecStrideC;
pTmpBsBuf += 8;
}
for (i = 0; i < 8; i++) { //cr
memcpy (pDecV, pTmpBsBuf, iCopySizeUV);
pDecV += iDecStrideC;
pTmpBsBuf += 8;
}
pBs->pCurBuf += 384;
InitReadBits (pBs);
//step 3: update QP and pNonZeroCount
pCurLayer->pLumaQp[iMbXy] = 0;
pCurLayer->pChromaQp[iMbXy] = 0;
//Rec. 9.2.1 for PCM, nzc=16
ST32A4 (&pNzc[0], 0x10101010);
ST32A4 (&pNzc[4], 0x10101010);
ST32A4 (&pNzc[8], 0x10101010);
ST32A4 (&pNzc[12], 0x10101010);
ST32A4 (&pNzc[16], 0x10101010);
ST32A4 (&pNzc[20], 0x10101010);
return 0;
} else {
if (0 == uiMbType) {
ENFORCE_STACK_ALIGN_1D (int8_t, pIntraPredMode, 48, 16);
pCurLayer->pMbType[iMbXy] = MB_TYPE_INTRA4x4;
pCtx->pFillInfoCacheIntra4x4Func (&sNeighAvail, pNonZeroCount, pIntraPredMode, pCurLayer);
if (pCtx->pParseIntra4x4ModeFunc (&sNeighAvail, pIntraPredMode, pBs, pCurLayer)) {
return -1;
}
} else { //I_PCM exclude, we can ignore it
pCurLayer->pMbType[iMbXy] = MB_TYPE_INTRA16x16;
pCurLayer->pIntraPredMode[iMbXy][7] = (uiMbType - 1) & 3;
pCurLayer->pCbp[iMbXy] = g_kuiI16CbpTable[ (uiMbType - 1) >> 2];
uiCbpC = pCurLayer->pCbp[iMbXy] >> 4;
uiCbpL = pCurLayer->pCbp[iMbXy] & 15;
WelsFillCacheNonZeroCount (&sNeighAvail, pNonZeroCount, pCurLayer);
if (pCtx->pParseIntra16x16ModeFunc (&sNeighAvail, pBs, pCurLayer)) {
return -1;
}
}
}
}
if (MB_TYPE_INTRA16x16 != pCurLayer->pMbType[iMbXy]) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //coded_block_pattern
uiCbp = uiCode;
{
if (uiCbp > 47)
return ERR_INFO_INVALID_CBP;
if (MB_TYPE_INTRA4x4 == pCurLayer->pMbType[iMbXy]) {
uiCbp = g_kuiIntra4x4CbpTable[uiCbp];
} else //inter
uiCbp = g_kuiInterCbpTable[uiCbp];
}
pCurLayer->pCbp[iMbXy] = uiCbp;
uiCbpC = pCurLayer->pCbp[iMbXy] >> 4;
uiCbpL = pCurLayer->pCbp[iMbXy] & 15;
}
memset (pCurLayer->pScaledTCoeff[iMbXy], 0, MB_COEFF_LIST_SIZE * sizeof (int16_t));
ST32A4 (&pNzc[0], 0);
ST32A4 (&pNzc[4], 0);
ST32A4 (&pNzc[8], 0);
ST32A4 (&pNzc[12], 0);
ST32A4 (&pNzc[16], 0);
ST32A4 (&pNzc[20], 0);
if (pCurLayer->pCbp[iMbXy] == 0 && !IS_INTRA16x16 (pCurLayer->pMbType[iMbXy]) && !IS_I_BL (pCurLayer->pMbType[iMbXy])) {
pCurLayer->pLumaQp[iMbXy] = pSlice->iLastMbQp;
pCurLayer->pChromaQp[iMbXy] = g_kuiChromaQpTable[WELS_CLIP3 (pCurLayer->pLumaQp[iMbXy] +
pSliceHeader->pPps->iChromaQpIndexOffset, 0, 51)];
}
if (pCurLayer->pCbp[iMbXy] || MB_TYPE_INTRA16x16 == pCurLayer->pMbType[iMbXy]) {
int32_t iQpDelta, iId8x8, iId4x4;
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //mb_qp_delta
iQpDelta = iCode;
if (iQpDelta > 25 || iQpDelta < -26) { //out of iQpDelta range
return ERR_INFO_INVALID_QP;
}
pCurLayer->pLumaQp[iMbXy] = pSlice->iLastMbQp + iQpDelta; //update iLastMbQp
//refer to JVT-X201wcm1.doc equation(7-35)
if ((unsigned) (pCurLayer->pLumaQp[iMbXy]) > 51) {
if (pCurLayer->pLumaQp[iMbXy] < 0) {
pCurLayer->pLumaQp[iMbXy] += 52;
} else {
pCurLayer->pLumaQp[iMbXy] -= 52;
}
}
//QP should be in the range of [0, 51]
if (pCurLayer->pLumaQp[iMbXy] < 0 || pCurLayer->pLumaQp[iMbXy] > 51) {
return ERR_INFO_INVALID_QP;
}
pSlice->iLastMbQp = pCurLayer->pLumaQp[iMbXy];
pCurLayer->pChromaQp[iMbXy] = g_kuiChromaQpTable[WELS_CLIP3 (pSlice->iLastMbQp +
pSliceHeader->pPps->iChromaQpIndexOffset, 0,
51)];
BsStartCavlc (pBs);
if (MB_TYPE_INTRA16x16 == pCurLayer->pMbType[iMbXy]) {
//step1: Luma DC
if (WelsResidualBlockCavlc (pVlcTable, pNonZeroCount, pBs, 0, 16, g_kuiLumaDcZigzagScan,
I16_LUMA_DC, pCurLayer->pScaledTCoeff[iMbXy], pCurLayer->pLumaQp[iMbXy], pCtx)) {
return -1;//abnormal
}
//step2: Luma AC
if (uiCbpL) {
for (i = 0; i < 16; i++) {
if (WelsResidualBlockCavlc (pVlcTable, pNonZeroCount, pBs, i,
iScanIdxEnd - WELS_MAX (iScanIdxStart, 1) + 1, g_kuiZigzagScan + WELS_MAX (iScanIdxStart, 1),
I16_LUMA_AC, pCurLayer->pScaledTCoeff[iMbXy] + (i << 4), pCurLayer->pLumaQp[iMbXy], pCtx)) {
return -1;//abnormal
}
}
ST32A4 (&pNzc[0], LD32 (&pNonZeroCount[1 + 8 * 1]));
ST32A4 (&pNzc[4], LD32 (&pNonZeroCount[1 + 8 * 2]));
ST32A4 (&pNzc[8], LD32 (&pNonZeroCount[1 + 8 * 3]));
ST32A4 (&pNzc[12], LD32 (&pNonZeroCount[1 + 8 * 4]));
}
} else { //non-MB_TYPE_INTRA16x16
for (iId8x8 = 0; iId8x8 < 4; iId8x8++) {
if (uiCbpL & (1 << iId8x8)) {
int32_t iIndex = (iId8x8 << 2);
for (iId4x4 = 0; iId4x4 < 4; iId4x4++) {
//Luma (DC and AC decoding together)
if (WelsResidualBlockCavlc (pVlcTable, pNonZeroCount, pBs, iIndex,
iScanIdxEnd - iScanIdxStart + 1, g_kuiZigzagScan + iScanIdxStart, LUMA_DC_AC,
pCurLayer->pScaledTCoeff[iMbXy] + (iIndex << 4), pCurLayer->pLumaQp[iMbXy], pCtx)) {
return -1;//abnormal
}
iIndex++;
}
} else {
ST16 (&pNonZeroCount[g_kuiCache48CountScan4Idx[iId8x8 << 2]], 0);
ST16 (&pNonZeroCount[g_kuiCache48CountScan4Idx[ (iId8x8 << 2) + 2]], 0);
}
}
ST32A4 (&pNzc[0], LD32 (&pNonZeroCount[1 + 8 * 1]));
ST32A4 (&pNzc[4], LD32 (&pNonZeroCount[1 + 8 * 2]));
ST32A4 (&pNzc[8], LD32 (&pNonZeroCount[1 + 8 * 3]));
ST32A4 (&pNzc[12], LD32 (&pNonZeroCount[1 + 8 * 4]));
}
//chroma
//step1: DC
if (1 == uiCbpC || 2 == uiCbpC) {
for (i = 0; i < 2; i++) { //Cb Cr
if (WelsResidualBlockCavlc (pVlcTable, pNonZeroCount, pBs,
16 + (i << 2), 4, g_kuiChromaDcScan, CHROMA_DC, pCurLayer->pScaledTCoeff[iMbXy] + 256 + (i << 6),
pCurLayer->pChromaQp[iMbXy], pCtx)) {
return -1;//abnormal
}
}
} else {
}
//step2: AC
if (2 == uiCbpC) {
for (i = 0; i < 2; i++) { //Cb Cr
int32_t iIndex = 16 + (i << 2);
for (iId4x4 = 0; iId4x4 < 4; iId4x4++) {
if (WelsResidualBlockCavlc (pVlcTable, pNonZeroCount, pBs, iIndex,
iScanIdxEnd - WELS_MAX (iScanIdxStart, 1) + 1, g_kuiZigzagScan + WELS_MAX (iScanIdxStart, 1),
CHROMA_AC, pCurLayer->pScaledTCoeff[iMbXy] + (iIndex << 4), pCurLayer->pChromaQp[iMbXy], pCtx)) {
return -1;//abnormal
}
iIndex++;
}
}
ST16A2 (&pNzc[16], LD16A2 (&pNonZeroCount[6 + 8 * 1]));
ST16A2 (&pNzc[20], LD16A2 (&pNonZeroCount[6 + 8 * 2]));
ST16A2 (&pNzc[18], LD16A2 (&pNonZeroCount[6 + 8 * 4]));
ST16A2 (&pNzc[22], LD16A2 (&pNonZeroCount[6 + 8 * 5]));
}
BsEndCavlc (pBs);
}
return 0;
}
int32_t WelsDecodeMbCavlcPSlice (PWelsDecoderContext pCtx, PNalUnit pNalCur) {
PDqLayer pCurLayer = pCtx->pCurDqLayer;
PBitStringAux pBs = pCurLayer->pBitStringAux;
PSlice pSlice = &pCurLayer->sLayerInfo.sSliceInLayer;
PSliceHeader pSliceHeader = &pSlice->sSliceHeaderExt.sSliceHeader;
const int32_t iMbXy = pCurLayer->iMbXyIndex;
int8_t* pNzc = pCurLayer->pNzc[iMbXy];
int32_t iBaseModeFlag, i;
int32_t iRet = 0; //should have the return value to indicate decoding error or not, It's NECESSARY--2010.4.15
uint32_t uiCode;
if (-1 == pSlice->iMbSkipRun) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //mb_skip_run
pSlice->iMbSkipRun = uiCode;
if (-1 == pSlice->iMbSkipRun) {
return -1;
}
}
if (pSlice->iMbSkipRun--) {
int16_t iMv[2];
pCurLayer->pMbType[iMbXy] = MB_TYPE_SKIP;
ST32A4 (&pNzc[0], 0);
ST32A4 (&pNzc[4], 0);
ST32A4 (&pNzc[8], 0);
ST32A4 (&pNzc[12], 0);
ST32A4 (&pNzc[16], 0);
ST32A4 (&pNzc[20], 0);
pCurLayer->pInterPredictionDoneFlag[iMbXy] = 0;
memset (pCurLayer->pRefIndex[0][iMbXy], 0, sizeof (int8_t) * 16);
//predict iMv
PredPSkipMvFromNeighbor (pCurLayer, iMv);
for (i = 0; i < 16; i++) {
ST32A2 (pCurLayer->pMv[0][iMbXy][i], * (uint32_t*)iMv);
}
if (!pSlice->sSliceHeaderExt.bDefaultResidualPredFlag) {
memset (pCurLayer->pScaledTCoeff[iMbXy], 0, 384 * sizeof (int16_t));
}
//reset rS
if (!pSlice->sSliceHeaderExt.bDefaultResidualPredFlag ||
(pNalCur->sNalHeaderExt.uiQualityId == 0 && pNalCur->sNalHeaderExt.uiDependencyId == 0)) {
pCurLayer->pLumaQp[iMbXy] = pSlice->iLastMbQp;
pCurLayer->pChromaQp[iMbXy] = g_kuiChromaQpTable[WELS_CLIP3 (pCurLayer->pLumaQp[iMbXy] +
pSliceHeader->pPps->iChromaQpIndexOffset, 0, 51)];
}
pCurLayer->pCbp[iMbXy] = 0;
return 0;
}
if (pSlice->sSliceHeaderExt.bAdaptiveBaseModeFlag == 1) {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //base_mode_flag
iBaseModeFlag = uiCode;
} else {
iBaseModeFlag = pSlice->sSliceHeaderExt.bDefaultBaseModeFlag;
}
if (!iBaseModeFlag) {
iRet = WelsActualDecodeMbCavlcPSlice (pCtx);
} else {
WelsLog (& (pCtx->sLogCtx), WELS_LOG_WARNING, "iBaseModeFlag (%d) != 0, inter-layer prediction not supported.\n",
iBaseModeFlag);
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_UNSUPPORTED_ILP);
}
if (iRet) { //occur error when parsing, MUST STOP decoding
return iRet;
}
return 0;
}
void WelsBlockFuncInit (SBlockFunc* pFunc, int32_t iCpu) {
pFunc->pWelsSetNonZeroCountFunc = SetNonZeroCount_c;
#ifdef HAVE_NEON
if (iCpu & WELS_CPU_NEON) {
pFunc->pWelsSetNonZeroCountFunc = SetNonZeroCount_neon;
}
#endif
#ifdef HAVE_NEON_AARCH64
if (iCpu & WELS_CPU_NEON) {
pFunc->pWelsSetNonZeroCountFunc = SetNonZeroCount_AArch64_neon;
}
#endif
}
void SetNonZeroCount_c (int8_t* pNonZeroCount) {
int32_t i;
for (i = 0; i < 24; i++) {
pNonZeroCount[i] = !!pNonZeroCount[i];
}
}
} // namespace WelsDec