ref: cb1c0f9b5a8b5103d88a561f301073b754334f1e
dir: /codec/decoder/core/src/au_parser.cpp/
/*!
* \copy
* Copyright (c) 2009-2013, 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.
*
*
* \file au_parser.c
*
* \brief Interfaces introduced in Access Unit level based parser
*
* \date 03/10/2009 Created
*
*************************************************************************************
*/
#include "codec_def.h"
#include "au_parser.h"
#include "decoder.h"
#include "error_code.h"
#include "memmgr_nal_unit.h"
#include "decoder_core.h"
#include "decoder_core.h"
namespace WelsDec {
/*!
*************************************************************************************
* \brief Start Code Prefix (0x 00 00 00 01) detection
*
* \param pBuf bitstream payload buffer
* \param pOffset offset between NAL rbsp and original bitsteam that
* start code prefix is seperated from.
* \param iBufSize count size of buffer
*
* \return RBSP buffer of start code prefix exclusive
*
* \note N/A
*************************************************************************************
*/
uint8_t* DetectStartCodePrefix (const uint8_t* kpBuf, int32_t* pOffset, int32_t iBufSize) {
uint8_t* pBits = (uint8_t*)kpBuf;
do {
int32_t iIdx = 0;
while ((iIdx < iBufSize) && (! (*pBits))) {
++ pBits;
++ iIdx;
}
if (iIdx >= iBufSize) break;
++ iIdx;
++ pBits;
if ((iIdx >= 3) && ((* (pBits - 1)) == 0x1)) {
*pOffset = ((uintptr_t)pBits) - ((uintptr_t)kpBuf);
return pBits;
}
iBufSize -= iIdx;
} while (1);
return NULL;
}
/*!
*************************************************************************************
* \brief to parse nal unit
*
* \param pCtx decoder context
* \param pNalUnitHeader parsed result of NAL Unit Header to output
* \param pSrcRbsp bitstream buffer to input
* \param iSrcRbspLen length size of bitstream buffer payload
* \param pSrcNal
* \param iSrcNalLen
* \param pConsumedBytes consumed bytes during parsing
*
* \return decoded bytes payload, might be (pSrcRbsp+1) if no escapes
*
* \note N/A
*************************************************************************************
*/
uint8_t* ParseNalHeader (PWelsDecoderContext pCtx, SNalUnitHeader* pNalUnitHeader, uint8_t* pSrcRbsp,
int32_t iSrcRbspLen, uint8_t* pSrcNal, int32_t iSrcNalLen, int32_t* pConsumedBytes) {
PNalUnit pCurNal = NULL;
uint8_t* pNal = pSrcRbsp;
int32_t iNalSize = iSrcRbspLen;
PBitStringAux pBs = NULL;
bool bExtensionFlag = false;
int32_t iErr = ERR_NONE;
int32_t iBitSize = 0;
pNalUnitHeader->eNalUnitType = NAL_UNIT_UNSPEC_0;//SHOULD init it. because pCtx->sCurNalHead is common variable.
//remove the consecutive ZERO at the end of current NAL in the reverse order.--2011.6.1
{
int32_t iIndex = iSrcRbspLen - 1;
uint8_t uiBsZero = 0;
while (iIndex >= 0) {
uiBsZero = pSrcRbsp[iIndex];
if (0 == uiBsZero) {
--iNalSize;
--iIndex;
} else {
break;
}
}
}
pNalUnitHeader->uiForbiddenZeroBit = (uint8_t) (pNal[0] >> 7); // uiForbiddenZeroBit
if (pNalUnitHeader->uiForbiddenZeroBit) { //2010.4.14
return NULL; //uiForbiddenZeroBit should always equal to 0
}
pNalUnitHeader->uiNalRefIdc = (uint8_t) (pNal[0] >> 5); // uiNalRefIdc
pNalUnitHeader->eNalUnitType = (ENalUnitType) (pNal[0] & 0x1f); // eNalUnitType
++pNal;
--iNalSize;
++ (*pConsumedBytes);
#ifdef DEBUG_PARSE_INFO
WelsLog (pCtx, WELS_LOG_INFO, "nal type: %d \n", pNalUnitHeader->eNalUnitType);
#endif
if (! (IS_SEI_NAL (pNalUnitHeader->eNalUnitType) || IS_SPS_NAL (pNalUnitHeader->eNalUnitType)
|| pCtx->bSpsExistAheadFlag)) {
WelsLog (pCtx, WELS_LOG_WARNING,
"parse_nal(), no exist Sequence Parameter Sets ahead of sequence when try to decode NAL(type:%d).\n",
pNalUnitHeader->eNalUnitType);
pCtx->iErrorCode = dsNoParamSets;
return NULL;
}
if (! (IS_SEI_NAL (pNalUnitHeader->eNalUnitType) || IS_PARAM_SETS_NALS (pNalUnitHeader->eNalUnitType)
|| pCtx->bPpsExistAheadFlag)) {
WelsLog (pCtx, WELS_LOG_WARNING,
"parse_nal(), no exist Picture Parameter Sets ahead of sequence when try to decode NAL(type:%d).\n",
pNalUnitHeader->eNalUnitType);
pCtx->iErrorCode = dsNoParamSets;
return NULL;
}
if ((IS_VCL_NAL_AVC_BASE (pNalUnitHeader->eNalUnitType) && ! (pCtx->bSpsExistAheadFlag || pCtx->bPpsExistAheadFlag)) ||
(IS_NEW_INTRODUCED_NAL (pNalUnitHeader->eNalUnitType) && ! (pCtx->bSpsExistAheadFlag || pCtx->bSubspsExistAheadFlag
|| pCtx->bPpsExistAheadFlag))) {
WelsLog (pCtx, WELS_LOG_WARNING,
"ParseNalHeader(), no exist Parameter Sets ahead of sequence when try to decode slice(type:%d).\n",
pNalUnitHeader->eNalUnitType);
pCtx->iErrorCode |= dsNoParamSets;
return NULL;
}
switch (pNalUnitHeader->eNalUnitType) {
case NAL_UNIT_SEI:
if (pCtx->pAccessUnitList->uiAvailUnitsNum > 0) {
pCtx->pAccessUnitList->uiEndPos = pCtx->pAccessUnitList->uiAvailUnitsNum - 1;
pCtx->bAuReadyFlag = true;
}
break;
case NAL_UNIT_PREFIX:
pCurNal = &pCtx->sPrefixNal;
if (iNalSize < NAL_UNIT_HEADER_EXT_SIZE) {
pCtx->iErrorCode |= dsBitstreamError;
PAccessUnit pCurAu = pCtx->pAccessUnitList;
uint32_t uiAvailNalNum = pCurAu->uiAvailUnitsNum;
if (uiAvailNalNum > 0) {
pCurAu->uiEndPos = uiAvailNalNum - 1;
if (pCtx->iErrorConMethod == ERROR_CON_DISABLE) {
pCtx->bAuReadyFlag = true;
}
}
pCurNal->sNalData.sPrefixNal.bPrefixNalCorrectFlag = false;
return NULL;
}
DecodeNalHeaderExt (pCurNal, pNal);
if ((pCurNal->sNalHeaderExt.uiQualityId != 0) || (pCurNal->sNalHeaderExt.bUseRefBasePicFlag != 0)) {
WelsLog (pCtx, WELS_LOG_WARNING,
"ParseNalHeader() in Prefix Nal Unit:uiQualityId (%d) != 0, bUseRefBasePicFlag (%d) != 0, not supported!\n",
pCurNal->sNalHeaderExt.uiQualityId, pCurNal->sNalHeaderExt.bUseRefBasePicFlag);
PAccessUnit pCurAu = pCtx->pAccessUnitList;
uint32_t uiAvailNalNum = pCurAu->uiAvailUnitsNum;
if (uiAvailNalNum > 0) {
pCurAu->uiEndPos = uiAvailNalNum - 1;
if (pCtx->iErrorConMethod == ERROR_CON_DISABLE) {
pCtx->bAuReadyFlag = true;
}
}
pCurNal->sNalData.sPrefixNal.bPrefixNalCorrectFlag = false;
pCtx->iErrorCode |= dsInvalidArgument;
return NULL;
}
pNal += NAL_UNIT_HEADER_EXT_SIZE;
iNalSize -= NAL_UNIT_HEADER_EXT_SIZE;
*pConsumedBytes += NAL_UNIT_HEADER_EXT_SIZE;
pCurNal->sNalHeaderExt.sNalUnitHeader.uiForbiddenZeroBit = pNalUnitHeader->uiForbiddenZeroBit;
pCurNal->sNalHeaderExt.sNalUnitHeader.uiNalRefIdc = pNalUnitHeader->uiNalRefIdc;
pCurNal->sNalHeaderExt.sNalUnitHeader.eNalUnitType = pNalUnitHeader->eNalUnitType;
pBs = &pCtx->sBs;
iBitSize = (iNalSize << 3) - BsGetTrailingBits (pNal + iNalSize - 1); // convert into bit
InitBits (pBs, pNal, iBitSize);
ParsePrefixNalUnit (pCtx, pBs);
pCurNal->sNalData.sPrefixNal.bPrefixNalCorrectFlag = true;
break;
case NAL_UNIT_CODED_SLICE_EXT:
bExtensionFlag = true;
case NAL_UNIT_CODED_SLICE:
case NAL_UNIT_CODED_SLICE_IDR: {
PAccessUnit pCurAu = NULL;
uint32_t uiAvailNalNum;
pCurNal = MemGetNextNal (&pCtx->pAccessUnitList);
if (NULL == pCurNal) {
WelsLog (pCtx, WELS_LOG_WARNING, "MemGetNextNal() fail due out of memory.\n");
pCtx->iErrorCode |= dsOutOfMemory;
return NULL;
}
pCurNal->sNalHeaderExt.sNalUnitHeader.uiForbiddenZeroBit = pNalUnitHeader->uiForbiddenZeroBit;
pCurNal->sNalHeaderExt.sNalUnitHeader.uiNalRefIdc = pNalUnitHeader->uiNalRefIdc;
pCurNal->sNalHeaderExt.sNalUnitHeader.eNalUnitType = pNalUnitHeader->eNalUnitType;
pCurAu = pCtx->pAccessUnitList;
uiAvailNalNum = pCurAu->uiAvailUnitsNum;
if (pNalUnitHeader->eNalUnitType == NAL_UNIT_CODED_SLICE_EXT) {
if (iNalSize < NAL_UNIT_HEADER_EXT_SIZE) {
pCtx->iErrorCode |= dsBitstreamError;
ForceClearCurrentNal (pCurAu);
if (uiAvailNalNum > 1) {
pCurAu->uiEndPos = uiAvailNalNum - 2;
pCtx->bAuReadyFlag = true;
}
return NULL;
}
DecodeNalHeaderExt (pCurNal, pNal);
if (pCurNal->sNalHeaderExt.uiQualityId != 0 ||
pCurNal->sNalHeaderExt.bUseRefBasePicFlag) {
if (pCurNal->sNalHeaderExt.uiQualityId != 0)
WelsLog (pCtx, WELS_LOG_WARNING, "ParseNalHeader():uiQualityId (%d) != 0, MGS not supported!\n",
pCurNal->sNalHeaderExt.uiQualityId);
if (pCurNal->sNalHeaderExt.bUseRefBasePicFlag != 0)
WelsLog (pCtx, WELS_LOG_WARNING, "ParseNalHeader():bUseRefBasePicFlag (%d) != 0, MGS not supported!\n",
pCurNal->sNalHeaderExt.bUseRefBasePicFlag);
pCtx->iErrorCode |= dsInvalidArgument;
ForceClearCurrentNal (pCurAu);
if (uiAvailNalNum > 1) {
pCurAu->uiEndPos = uiAvailNalNum - 2;
pCtx->bAuReadyFlag = true;
}
return NULL;
}
pNal += NAL_UNIT_HEADER_EXT_SIZE;
iNalSize -= NAL_UNIT_HEADER_EXT_SIZE;
*pConsumedBytes += NAL_UNIT_HEADER_EXT_SIZE;
} else {
if (NAL_UNIT_PREFIX == pCtx->sPrefixNal.sNalHeaderExt.sNalUnitHeader.eNalUnitType) {
if (pCtx->sPrefixNal.sNalData.sPrefixNal.bPrefixNalCorrectFlag) {
PrefetchNalHeaderExtSyntax (pCtx, pCurNal, &pCtx->sPrefixNal);
}
}
pCurNal->sNalHeaderExt.bIdrFlag = (NAL_UNIT_CODED_SLICE_IDR == pNalUnitHeader->eNalUnitType) ? true :
false; //SHOULD update this flag for AVC if no prefix NAL
pCurNal->sNalHeaderExt.iNoInterLayerPredFlag = 1;
}
pBs = &pCurAu->pNalUnitsList[uiAvailNalNum - 1]->sNalData.sVclNal.sSliceBitsRead;
iBitSize = (iNalSize << 3) - BsGetTrailingBits (pNal + iNalSize - 1); // convert into bit
InitBits (pBs, pNal, iBitSize);
iErr = ParseSliceHeaderSyntaxs (pCtx, pBs, bExtensionFlag);
if (iErr != ERR_NONE) {
//if current NAL occur error when parsing, should clean it from pNalUnitsList
//otherwise, when Next good NAL decoding, this corrupt NAL is considered as normal NAL and lead to decoder crash
ForceClearCurrentNal (pCurAu);
if (uiAvailNalNum > 1) {
pCurAu->uiEndPos = uiAvailNalNum - 2;
pCtx->bAuReadyFlag = true;
}
return NULL;
}
if ((uiAvailNalNum == 1) && ((NAL_UNIT_CODED_SLICE_IDR == pNalUnitHeader->eNalUnitType)
|| (pCurNal->sNalHeaderExt.bIdrFlag))) {
ResetActiveSPSForEachLayer (pCtx);
}
if ((uiAvailNalNum > 1) &&
CheckAccessUnitBoundary (pCtx, pCurAu->pNalUnitsList[uiAvailNalNum - 1], pCurAu->pNalUnitsList[uiAvailNalNum - 2],
pCurAu->pNalUnitsList[uiAvailNalNum - 1]->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.pSps)) {
pCurAu->uiEndPos = uiAvailNalNum - 2;
pCtx->bAuReadyFlag = true;
pCtx->bNextNewSeqBegin = CheckNextAuNewSeq (pCtx, pCurNal, pCurNal->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.pSps);
}
}
break;
default:
break;
}
return pNal;
}
bool CheckAccessUnitBoundaryExt (PNalUnitHeaderExt pLastNalHdrExt, PNalUnitHeaderExt pCurNalHeaderExt,
PSliceHeader pLastSliceHeader, PSliceHeader pCurSliceHeader) {
const PSps kpSps = pCurSliceHeader->pSps;
//Sub-clause 7.1.4.1.1 temporal_id
if (pLastNalHdrExt->uiTemporalId != pCurNalHeaderExt->uiTemporalId) {
return true;
}
// Subclause 7.4.1.2.5
if (pLastSliceHeader->iRedundantPicCnt < pCurSliceHeader->iRedundantPicCnt)
return false;
else if (pLastSliceHeader->iRedundantPicCnt > pCurSliceHeader->iRedundantPicCnt)
return true;
// Subclause G7.4.1.2.4
if (pLastNalHdrExt->uiDependencyId < pCurNalHeaderExt->uiDependencyId)
return false;
else if (pLastNalHdrExt->uiDependencyId > pCurNalHeaderExt->uiDependencyId)
return true;
if (pLastNalHdrExt->uiQualityId < pCurNalHeaderExt->uiQualityId)
return false;
else if (pLastNalHdrExt->uiQualityId > pCurNalHeaderExt->uiQualityId)
return true;
// Subclause 7.4.1.2.4
if (pLastSliceHeader->iFrameNum != pCurSliceHeader->iFrameNum)
return true;
if (pLastSliceHeader->iPpsId != pCurSliceHeader->iPpsId)
return true;
if (pLastSliceHeader->bFieldPicFlag != pCurSliceHeader->bFieldPicFlag)
return true;
if (pLastSliceHeader->bBottomFiledFlag != pCurSliceHeader->bBottomFiledFlag)
return true;
if ((pLastNalHdrExt->sNalUnitHeader.uiNalRefIdc != NRI_PRI_LOWEST) != (pCurNalHeaderExt->sNalUnitHeader.uiNalRefIdc !=
NRI_PRI_LOWEST))
return true;
if (pLastNalHdrExt->bIdrFlag != pCurNalHeaderExt->bIdrFlag)
return true;
if (pCurNalHeaderExt->bIdrFlag) {
if (pLastSliceHeader->uiIdrPicId != pCurSliceHeader->uiIdrPicId)
return true;
}
if (kpSps->uiPocType == 0) {
if (pLastSliceHeader->iPicOrderCntLsb != pCurSliceHeader->iPicOrderCntLsb)
return true;
if (pLastSliceHeader->iDeltaPicOrderCntBottom != pCurSliceHeader->iDeltaPicOrderCntBottom)
return true;
} else if (kpSps->uiPocType == 1) {
if (pLastSliceHeader->iDeltaPicOrderCnt[0] != pCurSliceHeader->iDeltaPicOrderCnt[0])
return true;
if (pLastSliceHeader->iDeltaPicOrderCnt[1] != pCurSliceHeader->iDeltaPicOrderCnt[1])
return true;
}
return false;
}
bool CheckAccessUnitBoundary (PWelsDecoderContext pCtx, const PNalUnit kpCurNal, const PNalUnit kpLastNal,
const PSps kpSps) {
const PNalUnitHeaderExt kpLastNalHeaderExt = &kpLastNal->sNalHeaderExt;
const PNalUnitHeaderExt kpCurNalHeaderExt = &kpCurNal->sNalHeaderExt;
const SSliceHeader* kpLastSliceHeader = &kpLastNal->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader;
const SSliceHeader* kpCurSliceHeader = &kpCurNal->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader;
if (pCtx->pActiveLayerSps[kpCurNalHeaderExt->uiDependencyId] != NULL
&& pCtx->pActiveLayerSps[kpCurNalHeaderExt->uiDependencyId] != kpSps) {
return true; // the active sps changed, new sequence begins, so the current au is ready
}
//Sub-clause 7.1.4.1.1 temporal_id
if (kpLastNalHeaderExt->uiTemporalId != kpCurNalHeaderExt->uiTemporalId) {
return true;
}
if (kpLastSliceHeader->iFrameNum != kpCurSliceHeader->iFrameNum)
return true;
// Subclause 7.4.1.2.5
if (kpLastSliceHeader->iRedundantPicCnt > kpCurSliceHeader->iRedundantPicCnt)
return true;
// Subclause G7.4.1.2.4
if (kpLastNalHeaderExt->uiDependencyId > kpCurNalHeaderExt->uiDependencyId)
return true;
// Subclause 7.4.1.2.4
if (kpLastNalHeaderExt->uiDependencyId == kpCurNalHeaderExt->uiDependencyId
&& kpLastSliceHeader->iPpsId != kpCurSliceHeader->iPpsId)
return true;
if (kpLastSliceHeader->bFieldPicFlag != kpCurSliceHeader->bFieldPicFlag)
return true;
if (kpLastSliceHeader->bBottomFiledFlag != kpCurSliceHeader->bBottomFiledFlag)
return true;
if ((kpLastNalHeaderExt->sNalUnitHeader.uiNalRefIdc != NRI_PRI_LOWEST) != (kpCurNalHeaderExt->sNalUnitHeader.uiNalRefIdc
!= NRI_PRI_LOWEST))
return true;
if (kpLastNalHeaderExt->bIdrFlag != kpCurNalHeaderExt->bIdrFlag)
return true;
if (kpCurNalHeaderExt->bIdrFlag) {
if (kpLastSliceHeader->uiIdrPicId != kpCurSliceHeader->uiIdrPicId)
return true;
}
if (kpSps->uiPocType == 0) {
if (kpLastSliceHeader->iPicOrderCntLsb != kpCurSliceHeader->iPicOrderCntLsb)
return true;
if (kpLastSliceHeader->iDeltaPicOrderCntBottom != kpCurSliceHeader->iDeltaPicOrderCntBottom)
return true;
} else if (kpSps->uiPocType == 1) {
if (kpLastSliceHeader->iDeltaPicOrderCnt[0] != kpCurSliceHeader->iDeltaPicOrderCnt[0])
return true;
if (kpLastSliceHeader->iDeltaPicOrderCnt[1] != kpCurSliceHeader->iDeltaPicOrderCnt[1])
return true;
}
return false;
}
bool CheckNextAuNewSeq (PWelsDecoderContext pCtx, const PNalUnit kpCurNal, const PSps kpSps) {
const PNalUnitHeaderExt kpCurNalHeaderExt = &kpCurNal->sNalHeaderExt;
if (pCtx->pActiveLayerSps[kpCurNalHeaderExt->uiDependencyId] != NULL
&& pCtx->pActiveLayerSps[kpCurNalHeaderExt->uiDependencyId] != kpSps)
return true;
if (kpCurNalHeaderExt->bIdrFlag)
return true;
return false;
}
/*!
*************************************************************************************
* \brief to parse NON VCL NAL Units
*
* \param pCtx decoder context
* \param rbsp rbsp buffer of NAL Unit
* \param src_len length of rbsp buffer
*
* \return 0 - successed
* 1 - failed
*
*************************************************************************************
*/
int32_t ParseNonVclNal (PWelsDecoderContext pCtx, uint8_t* pRbsp, const int32_t kiSrcLen) {
PBitStringAux pBs = NULL;
ENalUnitType eNalType = NAL_UNIT_UNSPEC_0; // make initial value as unspecified
int32_t iPicWidth = 0;
int32_t iPicHeight = 0;
int32_t iBitSize = 0;
int32_t iErr = ERR_NONE;
if (kiSrcLen <= 0)
return iErr;
pBs = &pCtx->sBs; // SBitStringAux instance for non VCL NALs decoding
iBitSize = (kiSrcLen << 3) - BsGetTrailingBits (pRbsp + kiSrcLen - 1); // convert into bit
eNalType = pCtx->sCurNalHead.eNalUnitType;
switch (eNalType) {
case NAL_UNIT_SPS:
case NAL_UNIT_SUBSET_SPS:
if (iBitSize > 0)
InitBits (pBs, pRbsp, iBitSize);
#ifdef DEBUG_PARSE_INFO
WelsLog (pCtx, WELS_LOG_INFO, "parsing nal: %d \n", eNalType);
#endif
iErr = ParseSps (pCtx, pBs, &iPicWidth, &iPicHeight);
if (ERR_NONE != iErr) { // modified for pSps/pSubsetSps invalid, 12/1/2009
if (pCtx->iErrorConMethod == ERROR_CON_DISABLE)
pCtx->iErrorCode |= dsNoParamSets;
return iErr;
}
break;
case NAL_UNIT_PPS:
if (iBitSize > 0)
InitBits (pBs, pRbsp, iBitSize);
#ifdef DEBUG_PARSE_INFO
WelsLog (pCtx, WELS_LOG_INFO, "parsing nal: %d \n", eNalType);
#endif
iErr = ParsePps (pCtx, &pCtx->sPpsBuffer[0], pBs);
if (ERR_NONE != iErr) { // modified for pps invalid, 12/1/2009
if (pCtx->iErrorConMethod == ERROR_CON_DISABLE)
pCtx->iErrorCode |= dsNoParamSets;
return iErr;
}
pCtx->bPpsExistAheadFlag = true;
break;
case NAL_UNIT_SEI:
break;
case NAL_UNIT_PREFIX:
break;
case NAL_UNIT_CODED_SLICE_DPA:
case NAL_UNIT_CODED_SLICE_DPB:
case NAL_UNIT_CODED_SLICE_DPC:
break;
default:
break;
}
return iErr;
}
int32_t ParseRefBasePicMarking (PBitStringAux pBs, PRefBasePicMarking pRefBasePicMarking) {
uint32_t uiCode;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //adaptive_ref_base_pic_marking_mode_flag
const bool kbAdaptiveMarkingModeFlag = !!uiCode;
pRefBasePicMarking->bAdaptiveRefBasePicMarkingModeFlag = kbAdaptiveMarkingModeFlag;
if (kbAdaptiveMarkingModeFlag) {
int32_t iIdx = 0;
do {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //MMCO_base
const uint32_t kuiMmco = uiCode;
pRefBasePicMarking->mmco_base[iIdx].uiMmcoType = kuiMmco;
if (kuiMmco == MMCO_END)
break;
if (kuiMmco == MMCO_SHORT2UNUSED) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //difference_of_base_pic_nums_minus1
pRefBasePicMarking->mmco_base[iIdx].uiDiffOfPicNums = 1 + uiCode;
pRefBasePicMarking->mmco_base[iIdx].iShortFrameNum = 0;
} else if (kuiMmco == MMCO_LONG2UNUSED) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //long_term_base_pic_num
pRefBasePicMarking->mmco_base[iIdx].uiLongTermPicNum = uiCode;
}
++ iIdx;
} while (iIdx < MAX_MMCO_COUNT);
}
return ERR_NONE;
}
int32_t ParsePrefixNalUnit (PWelsDecoderContext pCtx, PBitStringAux pBs) {
PNalUnit pCurNal = &pCtx->sPrefixNal;
uint32_t uiCode;
if (pCurNal->sNalHeaderExt.sNalUnitHeader.uiNalRefIdc != 0) {
PNalUnitHeaderExt head_ext = &pCurNal->sNalHeaderExt;
PPrefixNalUnit sPrefixNal = &pCurNal->sNalData.sPrefixNal;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //store_ref_base_pic_flag
sPrefixNal->bStoreRefBasePicFlag = !!uiCode;
if ((head_ext->bUseRefBasePicFlag || sPrefixNal->bStoreRefBasePicFlag) && !head_ext->bIdrFlag) {
WELS_READ_VERIFY (ParseRefBasePicMarking (pBs, &sPrefixNal->sRefPicBaseMarking));
}
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //additional_prefix_nal_unit_extension_flag
sPrefixNal->bPrefixNalUnitAdditionalExtFlag = !!uiCode;
if (sPrefixNal->bPrefixNalUnitAdditionalExtFlag) {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //additional_prefix_nal_unit_extension_data_flag
sPrefixNal->bPrefixNalUnitExtFlag = !!uiCode;
}
}
return ERR_NONE;
}
#define SUBSET_SPS_SEQ_SCALED_REF_LAYER_LEFT_OFFSET_MIN -32768
#define SUBSET_SPS_SEQ_SCALED_REF_LAYER_LEFT_OFFSET_MAX 32767
#define SUBSET_SPS_SEQ_SCALED_REF_LAYER_TOP_OFFSET_MIN -32768
#define SUBSET_SPS_SEQ_SCALED_REF_LAYER_TOP_OFFSET_MAX 32767
#define SUBSET_SPS_SEQ_SCALED_REF_LAYER_RIGHT_OFFSET_MIN -32768
#define SUBSET_SPS_SEQ_SCALED_REF_LAYER_RIGHT_OFFSET_MAX 32767
#define SUBSET_SPS_SEQ_SCALED_REF_LAYER_BOTTOM_OFFSET_MIN -32768
#define SUBSET_SPS_SEQ_SCALED_REF_LAYER_BOTTOM_OFFSET_MAX 32767
int32_t DecodeSpsSvcExt (PWelsDecoderContext pCtx, PSubsetSps pSpsExt, PBitStringAux pBs) {
PSpsSvcExt pExt = NULL;
uint32_t uiCode;
int32_t iCode;
pExt = &pSpsExt->sSpsSvcExt;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //inter_layer_deblocking_filter_control_present_flag
pExt->bInterLayerDeblockingFilterCtrlPresentFlag = !!uiCode;
WELS_READ_VERIFY (BsGetBits (pBs, 2, &uiCode)); //extended_spatial_scalability_idc
pExt->uiExtendedSpatialScalability = uiCode;
if (pExt->uiExtendedSpatialScalability > 2) {
WelsLog (pCtx, WELS_LOG_WARNING, "DecodeSpsSvcExt():extended_spatial_scalability (%d) != 0, ESS not supported!\n",
pExt->uiExtendedSpatialScalability);
return GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_INVALID_ESS);
}
pExt->uiChromaPhaseXPlus1Flag =
0; // FIXME: Incoherent with JVT X201 standard (= 1), but conformance to JSVM (= 0) implementation.
pExt->uiChromaPhaseYPlus1 = 1;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //chroma_phase_x_plus1_flag
pExt->uiChromaPhaseXPlus1Flag = uiCode;
WELS_READ_VERIFY (BsGetBits (pBs, 2, &uiCode)); //chroma_phase_y_plus1
pExt->uiChromaPhaseYPlus1 = uiCode;
pExt->uiSeqRefLayerChromaPhaseXPlus1Flag = pExt->uiChromaPhaseXPlus1Flag;
pExt->uiSeqRefLayerChromaPhaseYPlus1 = pExt->uiChromaPhaseYPlus1;
memset (&pExt->sSeqScaledRefLayer, 0, sizeof (SPosOffset));
if (pExt->uiExtendedSpatialScalability == 1) {
SPosOffset* const kpPos = &pExt->sSeqScaledRefLayer;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //seq_ref_layer_chroma_phase_x_plus1_flag
pExt->uiSeqRefLayerChromaPhaseXPlus1Flag = uiCode;
WELS_READ_VERIFY (BsGetBits (pBs, 2, &uiCode)); //seq_ref_layer_chroma_phase_y_plus1
pExt->uiSeqRefLayerChromaPhaseYPlus1 = uiCode;
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //seq_scaled_ref_layer_left_offset
kpPos->iLeftOffset = iCode;
WELS_CHECK_SE_BOTH_WARNING (kpPos->iLeftOffset, SUBSET_SPS_SEQ_SCALED_REF_LAYER_LEFT_OFFSET_MIN,
SUBSET_SPS_SEQ_SCALED_REF_LAYER_LEFT_OFFSET_MAX, "seq_scaled_ref_layer_left_offset");
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //seq_scaled_ref_layer_top_offset
kpPos->iTopOffset = iCode;
WELS_CHECK_SE_BOTH_WARNING (kpPos->iTopOffset, SUBSET_SPS_SEQ_SCALED_REF_LAYER_TOP_OFFSET_MIN,
SUBSET_SPS_SEQ_SCALED_REF_LAYER_TOP_OFFSET_MAX, "seq_scaled_ref_layer_top_offset");
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //seq_scaled_ref_layer_right_offset
kpPos->iRightOffset = iCode;
WELS_CHECK_SE_BOTH_WARNING (kpPos->iRightOffset, SUBSET_SPS_SEQ_SCALED_REF_LAYER_RIGHT_OFFSET_MIN,
SUBSET_SPS_SEQ_SCALED_REF_LAYER_RIGHT_OFFSET_MAX, "seq_scaled_ref_layer_right_offset");
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //seq_scaled_ref_layer_bottom_offset
kpPos->iBottomOffset = iCode;
WELS_CHECK_SE_BOTH_WARNING (kpPos->iBottomOffset, SUBSET_SPS_SEQ_SCALED_REF_LAYER_BOTTOM_OFFSET_MIN,
SUBSET_SPS_SEQ_SCALED_REF_LAYER_BOTTOM_OFFSET_MAX, "seq_scaled_ref_layer_bottom_offset");
}
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //seq_tcoeff_level_prediction_flag
pExt->bSeqTCoeffLevelPredFlag = !!uiCode;
pExt->bAdaptiveTCoeffLevelPredFlag = false;
if (pExt->bSeqTCoeffLevelPredFlag) {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //adaptive_tcoeff_level_prediction_flag
pExt->bAdaptiveTCoeffLevelPredFlag = !!uiCode;
}
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //slice_header_restriction_flag
pExt->bSliceHeaderRestrictionFlag = !!uiCode;
return 0;
}
// table A-1 - Level limits
static const SLevelLimits g_kSLevelLimits[17] = {
{1485, 99, 396, 64, 175, -256, 255, 2, 0x7fff}, /* level 1 */
{1485, 99, 396, 128, 350, -256, 255, 2, 0x7fff}, /* level 1.b */
{3000, 396, 900, 192, 500, -512, 511, 2, 0x7fff}, /* level 1.1 */
{6000, 396, 2376, 384, 1000, -512, 511, 2, 0x7fff}, /* level 1.2 */
{11880, 396, 2376, 768, 2000, -512, 511, 2, 0x7fff}, /* level 1.3 */
{11880, 396, 2376, 2000, 2000, -512, 511, 2, 0x7fff}, /* level 2 */
{19800, 792, 4752, 4000, 4000, -1024, 1023, 2, 0x7fff}, /* level 2.1 */
{20250, 1620, 8100, 4000, 4000, -1024, 1023, 2, 0x7fff}, /* level 2.2 */
{40500, 1620, 8100, 10000, 10000, -1024, 1023, 2, 32 }, /* level 3 */
{108000, 3600, 18000, 14000, 14000, -2048, 2047, 4, 16}, /* level 3.1 */
{216000, 5120, 20480, 20000, 20000, -2048, 2047, 4, 16}, /* level 3.2 */
{245760, 8192, 32768, 20000, 25000, -2048, 2047, 4, 16}, /* level 4 */
{245760, 8192, 32768, 50000, 62500, -2048, 2047, 2, 16}, /* level 4.1 */
{522240, 8704, 34816, 50000, 62500, -2048, 2047, 2, 16}, /* level 4.2 */
{589824, 22080, 110400, 135000, 135000, -2048, 2047, 2, 16}, /* level 5 */
{983040, 36864, 184320, 240000, 240000, -2048, 2047, 2, 16}, /* level 5.1 */
{2073600, 36864, 184320, 240000, 240000, -2048, 2047, 2, 16} /* level 5.2 */
};
const SLevelLimits* GetLevelLimits (int32_t iLevelIdx, bool bConstraint3) {
switch (iLevelIdx) {
case 10:
return &g_kSLevelLimits[0];
case 11:
if (bConstraint3)
return &g_kSLevelLimits[1];
else
return &g_kSLevelLimits[2];
case 12:
return &g_kSLevelLimits[3];
case 13:
return &g_kSLevelLimits[4];
case 20:
return &g_kSLevelLimits[5];
case 21:
return &g_kSLevelLimits[6];
case 22:
return &g_kSLevelLimits[7];
case 30:
return &g_kSLevelLimits[8];
case 31:
return &g_kSLevelLimits[9];
case 32:
return &g_kSLevelLimits[10];
case 40:
return &g_kSLevelLimits[11];
case 41:
return &g_kSLevelLimits[12];
case 42:
return &g_kSLevelLimits[13];
case 50:
return &g_kSLevelLimits[14];
case 51:
return &g_kSLevelLimits[15];
case 52:
return &g_kSLevelLimits[16];
default:
return NULL;
}
return NULL;
}
bool CheckSpsActive (PWelsDecoderContext pCtx, PSps pSps) {
for (int i = 0; i < MAX_LAYER_NUM; i++) {
if (pCtx->pActiveLayerSps[i] == pSps)
return true;
}
return false;
}
#define SPS_LOG2_MAX_FRAME_NUM_MINUS4_MAX 12
#define SPS_LOG2_MAX_PIC_ORDER_CNT_LSB_MINUS4_MAX 12
#define SPS_NUM_REF_FRAMES_IN_PIC_ORDER_CNT_CYCLE_MAX 255
#define SPS_MAX_NUM_REF_FRAMES_MAX 16
#define PPS_PIC_INIT_QP_QS_MIN 0
#define PPS_PIC_INIT_QP_QS_MAX 51
#define PPS_CHROMA_QP_INDEX_OFFSET_MIN -12
#define PPS_CHROMA_QP_INDEX_OFFSET_MAX 12
/*!
*************************************************************************************
* \brief to parse Sequence Parameter Set (SPS)
*
* \param pCtx Decoder context
* \param pBsAux bitstream reader auxiliary
* \param pPicWidth picture width current Sps represented
* \param pPicHeight picture height current Sps represented
*
* \return 0 - successed
* 1 - failed
*
* \note Call it in case eNalUnitType is SPS.
*************************************************************************************
*/
int32_t ParseSps (PWelsDecoderContext pCtx, PBitStringAux pBsAux, int32_t* pPicWidth, int32_t* pPicHeight) {
PBitStringAux pBs = pBsAux;
SSubsetSps sTempSubsetSps;
PSps pSps = NULL;
PSubsetSps pSubsetSps = NULL;
SNalUnitHeader* pNalHead = &pCtx->sCurNalHead;
ProfileIdc uiProfileIdc;
uint8_t uiLevelIdc;
int32_t iSpsId;
uint32_t uiCode;
int32_t iCode;
bool bConstraintSetFlags[6] = { false };
const bool kbUseSubsetFlag = IS_SUBSET_SPS_NAL (pNalHead->eNalUnitType);
WELS_READ_VERIFY (BsGetBits (pBs, 8, &uiCode)); //profile_idc
uiProfileIdc = uiCode;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //constraint_set0_flag
bConstraintSetFlags[0] = !!uiCode;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //constraint_set1_flag
bConstraintSetFlags[1] = !!uiCode;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //constraint_set2_flag
bConstraintSetFlags[2] = !!uiCode;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //constraint_set3_flag
bConstraintSetFlags[3] = !!uiCode;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //constraint_set4_flag
bConstraintSetFlags[4] = !!uiCode;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //constraint_set5_flag
bConstraintSetFlags[5] = !!uiCode;
WELS_READ_VERIFY (BsGetBits (pBs, 2, &uiCode)); // reserved_zero_2bits, equal to 0
WELS_READ_VERIFY (BsGetBits (pBs, 8, &uiCode)); // level_idc
uiLevelIdc = uiCode;
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //seq_parameter_set_id
if (uiCode >= MAX_SPS_COUNT) { // Modified to check invalid negative iSpsId, 12/1/2009
WelsLog (pCtx, WELS_LOG_WARNING, " iSpsId is out of range! \n");
return GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_SPS_ID_OVERFLOW);
}
iSpsId = uiCode;
pSubsetSps = &sTempSubsetSps;
pSps = &sTempSubsetSps.sSps;
memset (pSubsetSps, 0, sizeof (SSubsetSps));
const SLevelLimits* pSLevelLimits = GetLevelLimits (uiLevelIdc, bConstraintSetFlags[3]);
if (NULL == pSLevelLimits) {
WelsLog (pCtx, WELS_LOG_WARNING, "ParseSps(): level_idx (%d).\n", uiLevelIdc);
return GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_UNSUPPORTED_NON_BASELINE);
} else pSps->pSLevelLimits = pSLevelLimits;
// syntax elements in default
pSps->uiChromaFormatIdc = 1;
pSps->uiProfileIdc = uiProfileIdc;
pSps->uiLevelIdc = uiLevelIdc;
pSps->iSpsId = iSpsId;
if (PRO_SCALABLE_BASELINE == uiProfileIdc || PRO_SCALABLE_HIGH == uiProfileIdc ||
PRO_HIGH == uiProfileIdc || PRO_HIGH10 == uiProfileIdc ||
PRO_HIGH422 == uiProfileIdc || PRO_HIGH444 == uiProfileIdc ||
PRO_CAVLC444 == uiProfileIdc || 44 == uiProfileIdc) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //chroma_format_idc
pSps->uiChromaFormatIdc = uiCode;
if (pSps->uiChromaFormatIdc != 1) {
WelsLog (pCtx, WELS_LOG_WARNING, "ParseSps(): chroma_format_idc (%d) = 1 supported.\n", pSps->uiChromaFormatIdc);
return GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_UNSUPPORTED_NON_BASELINE);
}
pSps->uiChromaArrayType = pSps->uiChromaFormatIdc;
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //bit_depth_luma_minus8
if (uiCode != 0) {
WelsLog (pCtx, WELS_LOG_WARNING, "ParseSps(): bit_depth_luma (%d) Only 8 bit supported.\n", 8 + uiCode);
return GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_UNSUPPORTED_NON_BASELINE);
}
pSps->uiBitDepthLuma = 8;
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //bit_depth_chroma_minus8
if (uiCode != 0) {
WelsLog (pCtx, WELS_LOG_WARNING, "ParseSps(): bit_depth_chroma (%d). Only 8 bit supported.\n", 8 + uiCode);
return GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_UNSUPPORTED_NON_BASELINE);
}
pSps->uiBitDepthChroma = 8;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //qpprime_y_zero_transform_bypass_flag
pSps->bQpPrimeYZeroTransfBypassFlag = !!uiCode;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //seq_scaling_matrix_present_flag
pSps->bSeqScalingMatrixPresentFlag = !!uiCode;
if (pSps->bSeqScalingMatrixPresentFlag) { // For high profile, it is not used in current application. FIXME
WelsLog (pCtx, WELS_LOG_WARNING, "ParseSps(): seq_scaling_matrix_present_flag (%d). Feature not supported.\n",
pSps->bSeqScalingMatrixPresentFlag);
return GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_UNSUPPORTED_NON_BASELINE);
}
}
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //log2_max_frame_num_minus4
WELS_CHECK_SE_UPPER_ERROR (uiCode, SPS_LOG2_MAX_FRAME_NUM_MINUS4_MAX, "log2_max_frame_num_minus4",
GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_INVALID_LOG2_MAX_FRAME_NUM_MINUS4));
pSps->uiLog2MaxFrameNum = LOG2_MAX_FRAME_NUM_OFFSET + uiCode;
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //pic_order_cnt_type
pSps->uiPocType = uiCode;
if (0 == pSps->uiPocType) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //log2_max_pic_order_cnt_lsb_minus4
// log2_max_pic_order_cnt_lsb_minus4 should be in range 0 to 12, inclusive. (sec. 7.4.3)
WELS_CHECK_SE_UPPER_ERROR (uiCode, SPS_LOG2_MAX_PIC_ORDER_CNT_LSB_MINUS4_MAX, "log2_max_pic_order_cnt_lsb_minus4",
GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_INVALID_LOG2_MAX_PIC_ORDER_CNT_LSB_MINUS4));
pSps->iLog2MaxPocLsb = LOG2_MAX_PIC_ORDER_CNT_LSB_OFFSET + uiCode; // log2_max_pic_order_cnt_lsb_minus4
} else if (1 == pSps->uiPocType) {
int32_t i;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //delta_pic_order_always_zero_flag
pSps->bDeltaPicOrderAlwaysZeroFlag = !!uiCode;
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //offset_for_non_ref_pic
pSps->iOffsetForNonRefPic = iCode;
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //offset_for_top_to_bottom_field
pSps->iOffsetForTopToBottomField = iCode;
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //num_ref_frames_in_pic_order_cnt_cycle
WELS_CHECK_SE_UPPER_ERROR (uiCode, SPS_NUM_REF_FRAMES_IN_PIC_ORDER_CNT_CYCLE_MAX,
"num_ref_frames_in_pic_order_cnt_cycle", GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS,
ERR_INFO_INVALID_NUM_REF_FRAME_IN_PIC_ORDER_CNT_CYCLE));
pSps->iNumRefFramesInPocCycle = uiCode;
for (i = 0; i < pSps->iNumRefFramesInPocCycle; i++) {
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //offset_for_ref_frame[ i ]
pSps->iOffsetForRefFrame[ i ] = iCode;
}
}
if (pSps->uiPocType > 2) {
WelsLog (pCtx, WELS_LOG_WARNING, " illegal pic_order_cnt_type: %d ! \n", pSps->uiPocType);
return GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_INVALID_POC_TYPE);
}
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //max_num_ref_frames
pSps->iNumRefFrames = uiCode;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //gaps_in_frame_num_value_allowed_flag
pSps->bGapsInFrameNumValueAllowedFlag = !!uiCode;
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //pic_width_in_mbs_minus1
pSps->iMbWidth = PIC_WIDTH_IN_MBS_OFFSET + uiCode;
if (pSps->iMbWidth > MAX_MB_SIZE) {
WelsLog (pCtx, WELS_LOG_ERROR, "pic_width_in_mbs(%d) exceeds the maximum allowed!\n", pSps->iMbWidth);
return GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_INVALID_MAX_MB_SIZE);
}
if (((uint64_t)pSps->iMbWidth * (uint64_t)pSps->iMbWidth) > (uint64_t) (8 * pSLevelLimits->iMaxFS)) {
WelsLog (pCtx, WELS_LOG_WARNING, " the pic_width_in_mbs exceeds the level limits!\n");
}
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //pic_height_in_map_units_minus1
pSps->iMbHeight = PIC_HEIGHT_IN_MAP_UNITS_OFFSET + uiCode;
if (pSps->iMbHeight > MAX_MB_SIZE) {
WelsLog (pCtx, WELS_LOG_ERROR, "pic_height_in_mbs(%d) exceeds the maximum allowed!\n", pSps->iMbHeight);
return GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_INVALID_MAX_MB_SIZE);
}
if (((uint64_t)pSps->iMbHeight * (uint64_t)pSps->iMbHeight) > (uint64_t) (8 * pSLevelLimits->iMaxFS)) {
WelsLog (pCtx, WELS_LOG_WARNING, " the pic_height_in_mbs exceeds the level limits!\n");
}
uint32_t uiTmp32 = pSps->iMbWidth * pSps->iMbHeight;
if (uiTmp32 > (uint32_t)pSLevelLimits->iMaxFS) {
WelsLog (pCtx, WELS_LOG_WARNING, " the total count of mb exceeds the level limits!\n");
}
pSps->uiTotalMbCount = uiTmp32;
WELS_CHECK_SE_UPPER_ERROR (pSps->iNumRefFrames, SPS_MAX_NUM_REF_FRAMES_MAX, "max_num_ref_frames",
GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_INVALID_MAX_NUM_REF_FRAMES));
// here we check max_num_ref_frames
uint32_t uiMaxDpbMbs = pSLevelLimits->iMaxDPBMbs;
uint32_t uiMaxDpbFrames = uiMaxDpbMbs / pSps->uiTotalMbCount;
if (uiMaxDpbFrames > SPS_MAX_NUM_REF_FRAMES_MAX)
uiMaxDpbFrames = SPS_MAX_NUM_REF_FRAMES_MAX;
if ((uint32_t)pSps->iNumRefFrames > uiMaxDpbFrames) {
WelsLog (pCtx, WELS_LOG_WARNING, " max_num_ref_frames exceeds level limits!\n");
}
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //frame_mbs_only_flag
pSps->bFrameMbsOnlyFlag = !!uiCode;
if (!pSps->bFrameMbsOnlyFlag) {
WelsLog (pCtx, WELS_LOG_WARNING, "ParseSps(): frame_mbs_only_flag (%d) not supported.\n", pSps->bFrameMbsOnlyFlag);
return GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_UNSUPPORTED_MBAFF);
}
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //direct_8x8_inference_flag
pSps->bDirect8x8InferenceFlag = !!uiCode;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //frame_cropping_flag
pSps->bFrameCroppingFlag = !!uiCode;
if (pSps->bFrameCroppingFlag) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //frame_crop_left_offset
pSps->sFrameCrop.iLeftOffset = uiCode;
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //frame_crop_right_offset
pSps->sFrameCrop.iRightOffset = uiCode;
if ((pSps->sFrameCrop.iLeftOffset + pSps->sFrameCrop.iRightOffset) > ((int32_t)pSps->iMbWidth * 16 / 2)) {
WelsLog (pCtx, WELS_LOG_WARNING, "frame_crop_left_offset + frame_crop_right_offset exceeds limits!\n");
}
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //frame_crop_top_offset
pSps->sFrameCrop.iTopOffset = uiCode;
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //frame_crop_bottom_offset
pSps->sFrameCrop.iBottomOffset = uiCode;
if ((pSps->sFrameCrop.iTopOffset + pSps->sFrameCrop.iBottomOffset) > ((int32_t)pSps->iMbHeight * 16 / 2)) {
WelsLog (pCtx, WELS_LOG_WARNING, "frame_crop_top_offset + frame_crop_right_offset exceeds limits!\n");
}
} else {
pSps->sFrameCrop.iLeftOffset = 0; // frame_crop_left_offset
pSps->sFrameCrop.iRightOffset = 0; // frame_crop_right_offset
pSps->sFrameCrop.iTopOffset = 0; // frame_crop_top_offset
pSps->sFrameCrop.iBottomOffset = 0; // frame_crop_bottom_offset
}
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //vui_parameters_present_flag
pSps->bVuiParamPresentFlag = !!uiCode;
// Check if SPS SVC extension applicated
if (kbUseSubsetFlag && (PRO_SCALABLE_BASELINE == uiProfileIdc || PRO_SCALABLE_HIGH == uiProfileIdc)) {
if (DecodeSpsSvcExt (pCtx, pSubsetSps, pBs) != ERR_NONE) {
return -1;
}
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //svc_vui_parameters_present_flag
pSubsetSps->bSvcVuiParamPresentFlag = !!uiCode;
if (pSubsetSps->bSvcVuiParamPresentFlag) {
}
}
if (PRO_SCALABLE_BASELINE == uiProfileIdc || PRO_SCALABLE_HIGH == uiProfileIdc)
pCtx->bAvcBasedFlag = false;
else
pCtx->bAvcBasedFlag = true; // added for avc base pBs
*pPicWidth = pSps->iMbWidth << 4;
*pPicHeight = pSps->iMbHeight << 4;
PSps pTmpSps = NULL;
if (kbUseSubsetFlag) {
pTmpSps = &pCtx->sSubsetSpsBuffer[iSpsId].sSps;
} else {
pTmpSps = &pCtx->sSpsBuffer[iSpsId];
}
if (CheckSpsActive (pCtx, pTmpSps)) {
// we are overwriting the active sps, copy a temp buffer
if (kbUseSubsetFlag) {
if (memcmp (&pCtx->sSubsetSpsBuffer[iSpsId], pSubsetSps, sizeof (SSubsetSps)) != 0) {
if (pCtx->pAccessUnitList->uiAvailUnitsNum > 0) {
memcpy (&pCtx->sSubsetSpsBuffer[MAX_SPS_COUNT], pSubsetSps, sizeof (SSubsetSps));
pCtx->bAuReadyFlag = true;
pCtx->pAccessUnitList->uiEndPos = pCtx->pAccessUnitList->uiAvailUnitsNum - 1;
pCtx->iOverwriteFlags |= OVERWRITE_SUBSETSPS;
} else {
memcpy (&pCtx->sSubsetSpsBuffer[iSpsId], pSubsetSps, sizeof (SSubsetSps));
}
}
} else {
if (memcmp (&pCtx->sSpsBuffer[iSpsId], pSps, sizeof (SSps)) != 0) {
if (pCtx->pAccessUnitList->uiAvailUnitsNum > 0) {
memcpy (&pCtx->sSpsBuffer[MAX_SPS_COUNT], pSps, sizeof (SSps));
pCtx->iOverwriteFlags |= OVERWRITE_SPS;
pCtx->bAuReadyFlag = true;
pCtx->pAccessUnitList->uiEndPos = pCtx->pAccessUnitList->uiAvailUnitsNum - 1;
} else {
memcpy (&pCtx->sSpsBuffer[iSpsId], pSps, sizeof (SSps));
}
}
}
}
// Not overwrite active sps, just copy to final place
else if (kbUseSubsetFlag) {
memcpy (&pCtx->sSubsetSpsBuffer[iSpsId], pSubsetSps, sizeof (SSubsetSps));
pCtx->bSubspsAvailFlags[iSpsId] = true;
pCtx->bSubspsExistAheadFlag = true;
} else {
memcpy (&pCtx->sSpsBuffer[iSpsId], pSps, sizeof (SSps));
pCtx->bSpsAvailFlags[iSpsId] = true;
pCtx->bSpsExistAheadFlag = true;
}
return 0;
}
/*!
*************************************************************************************
* \brief to parse Picture Parameter Set (PPS)
*
* \param pCtx Decoder context
* \param pPpsList pps list
* \param pBsAux bitstream reader auxiliary
*
* \return 0 - successed
* 1 - failed
*
* \note Call it in case eNalUnitType is PPS.
*************************************************************************************
*/
int32_t ParsePps (PWelsDecoderContext pCtx, PPps pPpsList, PBitStringAux pBsAux) {
PPps pPps = NULL;
SPps sTempPps;
uint32_t uiPpsId = 0;
uint32_t iTmp;
uint32_t uiCode;
int32_t iCode;
WELS_READ_VERIFY (BsGetUe (pBsAux, &uiCode)); //pic_parameter_set_id
uiPpsId = uiCode;
if (uiPpsId >= MAX_PPS_COUNT) {
return ERR_INFO_PPS_ID_OVERFLOW;
}
pPps = &sTempPps;
memset (pPps, 0, sizeof (SPps));
pPps->iPpsId = uiPpsId;
WELS_READ_VERIFY (BsGetUe (pBsAux, &uiCode)); //seq_parameter_set_id
pPps->iSpsId = uiCode;
if (pPps->iSpsId >= MAX_SPS_COUNT) {
return ERR_INFO_SPS_ID_OVERFLOW;
}
WELS_READ_VERIFY (BsGetOneBit (pBsAux, &uiCode)); //entropy_coding_mode_flag
pPps->bEntropyCodingModeFlag = !!uiCode;
WELS_READ_VERIFY (BsGetOneBit (pBsAux, &uiCode)); //bottom_field_pic_order_in_frame_present_flag
pPps->bPicOrderPresentFlag = !!uiCode;
WELS_READ_VERIFY (BsGetUe (pBsAux, &uiCode)); //num_slice_groups_minus1
pPps->uiNumSliceGroups = NUM_SLICE_GROUPS_OFFSET + uiCode;
if (pPps->uiNumSliceGroups > MAX_SLICEGROUP_IDS) {
return ERR_INFO_INVALID_SLICEGROUP;
}
if (pPps->uiNumSliceGroups > 1) {
WELS_READ_VERIFY (BsGetUe (pBsAux, &uiCode)); //slice_group_map_type
pPps->uiSliceGroupMapType = uiCode;
if (pPps->uiSliceGroupMapType > 1) {
WelsLog (pCtx, WELS_LOG_WARNING, "ParsePps(): slice_group_map_type (%d): support only 0,1.\n",
pPps->uiSliceGroupMapType);
return GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_UNSUPPORTED_FMOTYPE);
}
switch (pPps->uiSliceGroupMapType) {
case 0:
for (iTmp = 0; iTmp < pPps->uiNumSliceGroups; iTmp++) {
WELS_READ_VERIFY (BsGetUe (pBsAux, &uiCode)); //run_length_minus1[ iGroup ]
pPps->uiRunLength[iTmp] = RUN_LENGTH_OFFSET + uiCode;
}
break;
default:
break;
}
}
WELS_READ_VERIFY (BsGetUe (pBsAux, &uiCode)); //num_ref_idx_l0_default_active_minus1
pPps->uiNumRefIdxL0Active = NUM_REF_IDX_L0_DEFAULT_ACTIVE_OFFSET + uiCode;
WELS_READ_VERIFY (BsGetUe (pBsAux, &uiCode)); //num_ref_idx_l1_default_active_minus1
pPps->uiNumRefIdxL1Active = NUM_REF_IDX_L1_DEFAULT_ACTIVE_OFFSET + uiCode;
if (pPps->uiNumRefIdxL0Active > MAX_REF_PIC_COUNT ||
pPps->uiNumRefIdxL1Active > MAX_REF_PIC_COUNT) {
return ERR_INFO_REF_COUNT_OVERFLOW;
}
WELS_READ_VERIFY (BsGetOneBit (pBsAux, &uiCode)); //weighted_pred_flag
pPps->bWeightedPredFlag = !!uiCode;
WELS_READ_VERIFY (BsGetBits (pBsAux, 2, &uiCode)); //weighted_bipred_idc
pPps->uiWeightedBipredIdc = uiCode;
if (pPps->bWeightedPredFlag || pPps->uiWeightedBipredIdc != 0) {
WelsLog (pCtx, WELS_LOG_WARNING, "ParsePps(): weighted_pred_flag (%d) weighted_bipred_idc (%d) neither supported.\n",
pPps->bWeightedPredFlag, pPps->uiWeightedBipredIdc);
return GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_UNSUPPORTED_WP);
}
WELS_READ_VERIFY (BsGetSe (pBsAux, &iCode)); //pic_init_qp_minus26
pPps->iPicInitQp = PIC_INIT_QP_OFFSET + iCode;
WELS_CHECK_SE_BOTH_ERROR (pPps->iPicInitQp, PPS_PIC_INIT_QP_QS_MIN, PPS_PIC_INIT_QP_QS_MAX, "pic_init_qp_minus26 + 26",
GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_INVALID_PIC_INIT_QP));
WELS_READ_VERIFY (BsGetSe (pBsAux, &iCode)); //pic_init_qs_minus26
pPps->iPicInitQs = PIC_INIT_QS_OFFSET + iCode;
WELS_CHECK_SE_BOTH_ERROR (pPps->iPicInitQs, PPS_PIC_INIT_QP_QS_MIN, PPS_PIC_INIT_QP_QS_MAX, "pic_init_qs_minus26 + 26",
GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_INVALID_PIC_INIT_QS));
WELS_READ_VERIFY (BsGetSe (pBsAux, &iCode)); //chroma_qp_index_offset
pPps->iChromaQpIndexOffset = iCode;
WELS_CHECK_SE_BOTH_ERROR (pPps->iChromaQpIndexOffset, PPS_CHROMA_QP_INDEX_OFFSET_MIN, PPS_CHROMA_QP_INDEX_OFFSET_MAX,
"chroma_qp_index_offset", GENERATE_ERROR_NO (ERR_LEVEL_PARAM_SETS, ERR_INFO_INVALID_CHROMA_QP_INDEX_OFFSET));
WELS_READ_VERIFY (BsGetOneBit (pBsAux, &uiCode)); //deblocking_filter_control_present_flag
pPps->bDeblockingFilterControlPresentFlag = !!uiCode;
WELS_READ_VERIFY (BsGetOneBit (pBsAux, &uiCode)); //constrained_intra_pred_flag
pPps->bConstainedIntraPredFlag = !!uiCode;
WELS_READ_VERIFY (BsGetOneBit (pBsAux, &uiCode)); //redundant_pic_cnt_present_flag
pPps->bRedundantPicCntPresentFlag = !!uiCode;
if (pCtx->pAccessUnitList->uiAvailUnitsNum > 0) {
PNalUnit pLastNalUnit = pCtx->pAccessUnitList->pNalUnitsList[pCtx->pAccessUnitList->uiAvailUnitsNum - 1];
PPps pLastPps = pLastNalUnit->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.pPps;
// the active pps is overwrite, write to a temp place
if (pLastPps == &pCtx->sPpsBuffer[uiPpsId] && memcmp (&pCtx->sPpsBuffer[uiPpsId], pPps, sizeof (*pPps)) != 0) {
memcpy (&pCtx->sPpsBuffer[MAX_PPS_COUNT], pPps, sizeof (SPps));
pCtx->iOverwriteFlags |= OVERWRITE_PPS;
pCtx->bAuReadyFlag = true;
pCtx->pAccessUnitList->uiEndPos = pCtx->pAccessUnitList->uiAvailUnitsNum - 1;
} else {
memcpy (&pCtx->sPpsBuffer[uiPpsId], pPps, sizeof (SPps));
pCtx->bPpsAvailFlags[uiPpsId] = true;
}
} else {
memcpy (&pCtx->sPpsBuffer[uiPpsId], pPps, sizeof (SPps));
pCtx->bPpsAvailFlags[uiPpsId] = true;
}
return ERR_NONE;
}
/*!
*************************************************************************************
* \brief to parse SEI message payload
*
* \param pSei sei message to be parsed output
* \param pBsAux bitstream reader auxiliary
*
* \return 0 - successed
* 1 - failed
*
* \note Call it in case eNalUnitType is NAL_UNIT_SEI.
*************************************************************************************
*/
int32_t ParseSei (void* pSei, PBitStringAux pBsAux) { // reserved Sei_Msg type
return ERR_NONE;
}
/*!
*************************************************************************************
* \brief reset fmo list due to got Sps now
*
* \param pCtx decoder context
*
* \return count number of fmo context units are reset
*************************************************************************************
*/
int32_t ResetFmoList (PWelsDecoderContext pCtx) {
int32_t iCountNum = 0;
if (NULL != pCtx) {
// Fixed memory leak due to PPS_ID might not be continuous sometimes, 1/5/2010
UninitFmoList (&pCtx->sFmoList[0], MAX_PPS_COUNT, pCtx->iActiveFmoNum);
iCountNum = pCtx->iActiveFmoNum;
pCtx->iActiveFmoNum = 0;
}
return iCountNum;
}
} // namespace WelsDec