ref: d875d923f8eb303003b98421720b4c9b5624bc0f
dir: /codec/decoder/core/src/decoder_core.cpp/
/*!
* \copy
* Copyright (c) 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.
*
* decoder_core.c: Wels decoder framework core implementation
*/
#include "decoder_core.h"
#include "error_code.h"
#include "memmgr_nal_unit.h"
#include "au_parser.h"
#include "decode_slice.h"
#include "manage_dec_ref.h"
#include "expand_pic.h"
#include "decoder.h"
#include "decode_mb_aux.h"
#include "mem_align.h"
#include "error_concealment.h"
namespace WelsDec {
static inline int32_t DecodeFrameConstruction (PWelsDecoderContext pCtx, uint8_t** ppDst, SBufferInfo* pDstInfo) {
PDqLayer pCurDq = pCtx->pCurDqLayer;
PPicture pPic = pCtx->pDec;
const int32_t kiWidth = pCurDq->iMbWidth << 4;
const int32_t kiHeight = pCurDq->iMbHeight << 4;
const int32_t kiTotalNumMbInCurLayer = pCurDq->iMbWidth * pCurDq->iMbHeight;
bool bFrameCompleteFlag = true;
if (pCtx->bNewSeqBegin) {
memcpy (& (pCtx->sFrameCrop), & (pCurDq->sLayerInfo.sSliceInLayer.sSliceHeaderExt.sSliceHeader.pSps->sFrameCrop),
sizeof (SPosOffset)); //confirmed_safe_unsafe_usage
#ifdef LONG_TERM_REF
pCtx->bParamSetsLostFlag = false;
#else
pCtx->bReferenceLostAtT0Flag = false; // need initialize it due new seq, 6/4/2010
#endif //LONG_TERM_REF
if (pCtx->iTotalNumMbRec == kiTotalNumMbInCurLayer) {
pCtx->bPrintFrameErrorTraceFlag = true;
WelsLog (& (pCtx->sLogCtx), WELS_LOG_INFO,
"DecodeFrameConstruction()::::output first frame of new sequence, %d x %d, crop_left:%d, crop_right:%d, crop_top:%d, crop_bottom:%d, ignored error packet:%d.",
kiWidth, kiHeight, pCtx->sFrameCrop.iLeftOffset, pCtx->sFrameCrop.iRightOffset, pCtx->sFrameCrop.iTopOffset,
pCtx->sFrameCrop.iBottomOffset, pCtx->iIgnoredErrorInfoPacketCount);
pCtx->iIgnoredErrorInfoPacketCount = 0;
}
}
if (pCtx->iTotalNumMbRec != kiTotalNumMbInCurLayer) {
WelsLog (& (pCtx->sLogCtx), WELS_LOG_DEBUG,
"DecodeFrameConstruction():::iTotalNumMbRec:%d, total_num_mb_sps:%d, cur_layer_mb_width:%d, cur_layer_mb_height:%d ",
pCtx->iTotalNumMbRec, kiTotalNumMbInCurLayer, pCurDq->iMbWidth, pCurDq->iMbHeight);
bFrameCompleteFlag = false; //return later after output buffer is done
if (pCtx->bInstantDecFlag) //no-delay decoding, wait for new slice
return -1;
} else if (pCurDq->sLayerInfo.sNalHeaderExt.bIdrFlag
&& (pCtx->iErrorCode == dsErrorFree)) { //complete non-ECed IDR frame done
pCtx->bDecErrorConedFlag = false;
}
pCtx->iTotalNumMbRec = 0;
//////output:::normal path
ppDst[0] = pPic->pData[0];
ppDst[1] = pPic->pData[1];
ppDst[2] = pPic->pData[2];
pDstInfo->UsrData.sSystemBuffer.iFormat = videoFormatI420;
pDstInfo->UsrData.sSystemBuffer.iWidth = kiWidth - (pCtx->sFrameCrop.iLeftOffset + pCtx->sFrameCrop.iRightOffset) * 2;
pDstInfo->UsrData.sSystemBuffer.iHeight = kiHeight - (pCtx->sFrameCrop.iTopOffset + pCtx->sFrameCrop.iBottomOffset) * 2;
pDstInfo->UsrData.sSystemBuffer.iStride[0] = pPic->iLinesize[0];
pDstInfo->UsrData.sSystemBuffer.iStride[1] = pPic->iLinesize[1];
ppDst[0] = ppDst[0] + pCtx->sFrameCrop.iTopOffset * 2 * pPic->iLinesize[0] + pCtx->sFrameCrop.iLeftOffset * 2;
ppDst[1] = ppDst[1] + pCtx->sFrameCrop.iTopOffset * pPic->iLinesize[1] + pCtx->sFrameCrop.iLeftOffset;
ppDst[2] = ppDst[2] + pCtx->sFrameCrop.iTopOffset * pPic->iLinesize[1] + pCtx->sFrameCrop.iLeftOffset;
pDstInfo->iBufferStatus = 1;
if (pCtx->eErrorConMethod == ERROR_CON_DISABLE) //no buffer output if EC is disabled and frame incomplete
pDstInfo->iBufferStatus = (int32_t) bFrameCompleteFlag;
if (!bFrameCompleteFlag) {
pCtx->iErrorCode |= dsBitstreamError;
return -1;
}
return 0;
}
inline bool CheckSliceNeedReconstruct (uint8_t uiLayerDqId, uint8_t uiTargetDqId) {
return (uiLayerDqId == uiTargetDqId); // target layer
}
inline uint8_t GetTargetDqId (uint8_t uiTargetDqId, SDecodingParam* psParam) {
uint8_t uiRequiredDqId = psParam ? psParam->uiTargetDqLayer : (uint8_t)255;
return WELS_MIN (uiTargetDqId, uiRequiredDqId);
}
inline void HandleReferenceLostL0 (PWelsDecoderContext pCtx, PNalUnit pCurNal) {
if (0 == pCurNal->sNalHeaderExt.uiTemporalId) {
pCtx->bReferenceLostAtT0Flag = true;
}
if (pCtx->eErrorConMethod == ERROR_CON_DISABLE) {
#ifndef LONG_TERM_REF
if (pCtx->bReferenceLostAtT0Flag) {
ResetParameterSetsState (pCtx);
}
#endif
}
pCtx->iErrorCode |= dsBitstreamError;
}
inline void HandleReferenceLost (PWelsDecoderContext pCtx, PNalUnit pCurNal) {
if ((0 == pCurNal->sNalHeaderExt.uiTemporalId) || (1 == pCurNal->sNalHeaderExt.uiTemporalId)) {
pCtx->bReferenceLostAtT0Flag = true;
}
if (pCtx->eErrorConMethod == ERROR_CON_DISABLE) {
#ifndef LONG_TERM_REF
if (pCtx->bReferenceLostAtT0Flag) {
ResetParameterSetsState (pCtx);
}
#endif
}
pCtx->iErrorCode |= dsRefLost;
}
inline int32_t WelsDecodeConstructSlice (PWelsDecoderContext pCtx, PNalUnit pCurNal) {
int32_t iRet = WelsTargetSliceConstruction (pCtx);
if (iRet) {
HandleReferenceLostL0 (pCtx, pCurNal);
}
return iRet;
}
/*
* Predeclared function routines ..
*/
int32_t ParseRefPicListReordering (PBitStringAux pBs, PSliceHeader pSh) {
int32_t iList = 0;
const EWelsSliceType keSt = pSh->eSliceType;
PRefPicListReorderSyn pRefPicListReordering = &pSh->pRefPicListReordering;
PSps pSps = pSh->pSps;
uint32_t uiCode;
if (keSt == I_SLICE || keSt == SI_SLICE)
return ERR_NONE;
// Common syntaxs for P or B slices: list0, list1 followed if B slices used.
do {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //ref_pic_list_modification_flag_l0
pRefPicListReordering->bRefPicListReorderingFlag[iList] = !!uiCode;
if (pRefPicListReordering->bRefPicListReorderingFlag[iList]) {
int32_t iIdx = 0;
do {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //modification_of_pic_nums_idc
const uint32_t kuiIdc = uiCode;
//Fixed the referrence list reordering crash issue.(fault kIdc value > 3 case)---
if ((iIdx >= MAX_REF_PIC_COUNT) || (kuiIdc > 3)) {
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_INVALID_REF_REORDERING);
}
pRefPicListReordering->sReorderingSyn[iList][iIdx].uiReorderingOfPicNumsIdc = kuiIdc;
if (kuiIdc == 3)
break;
if (iIdx >= pSh->uiRefCount[iList] || iIdx >= MAX_REF_PIC_COUNT)
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_INVALID_REF_REORDERING);
if (kuiIdc == 0 || kuiIdc == 1) {
// abs_diff_pic_num_minus1 should be in range 0 to MaxPicNum-1, MaxPicNum is derived as
// 2^(4+log2_max_frame_num_minus4)
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //abs_diff_pic_num_minus1
WELS_CHECK_SE_UPPER_ERROR_NOLOG (uiCode, (uint32_t) (1 << pSps->uiLog2MaxFrameNum), "abs_diff_pic_num_minus1",
GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_INVALID_REF_REORDERING));
pRefPicListReordering->sReorderingSyn[iList][iIdx].uiAbsDiffPicNumMinus1 = uiCode; // uiAbsDiffPicNumMinus1
} else if (kuiIdc == 2) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //long_term_pic_num
pRefPicListReordering->sReorderingSyn[iList][iIdx].uiLongTermPicNum = uiCode;
}
++ iIdx;
} while (true);
}
if (keSt != B_SLICE)
break;
++ iList;
} while (iList < LIST_A);
return ERR_NONE;
}
int32_t ParseDecRefPicMarking (PWelsDecoderContext pCtx, PBitStringAux pBs, PSliceHeader pSh, PSps pSps,
const bool kbIdrFlag) {
PRefPicMarking const kpRefMarking = &pSh->sRefMarking;
uint32_t uiCode;
if (kbIdrFlag) {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //no_output_of_prior_pics_flag
kpRefMarking->bNoOutputOfPriorPicsFlag = !!uiCode;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //long_term_reference_flag
kpRefMarking->bLongTermRefFlag = !!uiCode;
} else {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //adaptive_ref_pic_marking_mode_flag
kpRefMarking->bAdaptiveRefPicMarkingModeFlag = !!uiCode;
if (kpRefMarking->bAdaptiveRefPicMarkingModeFlag) {
int32_t iIdx = 0;
do {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //memory_management_control_operation
const int32_t kiMmco = uiCode;
kpRefMarking->sMmcoRef[iIdx].uiMmcoType = kiMmco;
if (kiMmco == MMCO_END)
break;
if (kiMmco == MMCO_SHORT2UNUSED || kiMmco == MMCO_SHORT2LONG) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //difference_of_pic_nums_minus1
kpRefMarking->sMmcoRef[iIdx].iDiffOfPicNum = 1 + uiCode;
kpRefMarking->sMmcoRef[iIdx].iShortFrameNum = (pSh->iFrameNum - kpRefMarking->sMmcoRef[iIdx].iDiffOfPicNum) & ((
1 << pSps->uiLog2MaxFrameNum) - 1);
} else if (kiMmco == MMCO_LONG2UNUSED) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //long_term_pic_num
kpRefMarking->sMmcoRef[iIdx].uiLongTermPicNum = uiCode;
}
if (kiMmco == MMCO_SHORT2LONG || kiMmco == MMCO_LONG) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //long_term_frame_idx
kpRefMarking->sMmcoRef[iIdx].iLongTermFrameIdx = uiCode;
} else if (kiMmco == MMCO_SET_MAX_LONG) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //max_long_term_frame_idx_plus1
kpRefMarking->sMmcoRef[iIdx].iMaxLongTermFrameIdx = -1 + uiCode;
}
++ iIdx;
} while (iIdx < MAX_MMCO_COUNT);
}
}
return ERR_NONE;
}
bool FillDefaultSliceHeaderExt (PSliceHeaderExt pShExt, PNalUnitHeaderExt pNalExt) {
if (pShExt == NULL || pNalExt == NULL)
return false;
if (pNalExt->iNoInterLayerPredFlag || pNalExt->uiQualityId > 0)
pShExt->bBasePredWeightTableFlag = false;
else
pShExt->bBasePredWeightTableFlag = true;
pShExt->uiRefLayerDqId = (uint8_t) - 1;
pShExt->uiDisableInterLayerDeblockingFilterIdc = 0;
pShExt->iInterLayerSliceAlphaC0Offset = 0;
pShExt->iInterLayerSliceBetaOffset = 0;
pShExt->bConstrainedIntraResamplingFlag = false;
pShExt->uiRefLayerChromaPhaseXPlus1Flag = 0;
pShExt->uiRefLayerChromaPhaseYPlus1 = 1;
//memset(&pShExt->sScaledRefLayer, 0, sizeof(SPosOffset));
pShExt->iScaledRefLayerPicWidthInSampleLuma = pShExt->sSliceHeader.iMbWidth << 4;
pShExt->iScaledRefLayerPicHeightInSampleLuma = pShExt->sSliceHeader.iMbHeight << 4;
pShExt->bSliceSkipFlag = false;
pShExt->bAdaptiveBaseModeFlag = false;
pShExt->bDefaultBaseModeFlag = false;
pShExt->bAdaptiveMotionPredFlag = false;
pShExt->bDefaultMotionPredFlag = false;
pShExt->bAdaptiveResidualPredFlag = false;
pShExt->bDefaultResidualPredFlag = false;
pShExt->bTCoeffLevelPredFlag = false;
pShExt->uiScanIdxStart = 0;
pShExt->uiScanIdxEnd = 15;
return true;
}
int32_t InitBsBuffer (PWelsDecoderContext pCtx) {
if (pCtx == NULL)
return ERR_INFO_INVALID_PTR;
pCtx->iMaxBsBufferSizeInByte = MIN_ACCESS_UNIT_CAPACITY * MAX_BUFFERED_NUM;
if ((pCtx->sRawData.pHead = static_cast<uint8_t*> (WelsMalloc (pCtx->iMaxBsBufferSizeInByte,
"pCtx->sRawData.pHead"))) == NULL) {
return ERR_INFO_OUT_OF_MEMORY;
}
pCtx->sRawData.pStartPos = pCtx->sRawData.pCurPos = pCtx->sRawData.pHead;
pCtx->sRawData.pEnd = pCtx->sRawData.pHead + pCtx->iMaxBsBufferSizeInByte;
return ERR_NONE;
}
int32_t ExpandBsBuffer (PWelsDecoderContext pCtx, const int kiSrcLen) {
if (pCtx == NULL)
return ERR_INFO_INVALID_PTR;
int32_t iExpandStepShift = 1;
int32_t iNewBuffLen = WELS_MAX ((kiSrcLen * MAX_BUFFERED_NUM), (pCtx->iMaxBsBufferSizeInByte << iExpandStepShift));
//allocate new bs buffer
uint8_t* pNewBsBuff = static_cast<uint8_t*> (WelsMalloc (iNewBuffLen, "pCtx->sRawData.pHead"));
if (pNewBsBuff == NULL)
return ERR_INFO_OUT_OF_MEMORY;
//Calculate and set the bs start and end position
for (uint32_t i = 0; i <= pCtx->pAccessUnitList->uiActualUnitsNum; i++) {
PBitStringAux pSliceBitsRead = &pCtx->pAccessUnitList->pNalUnitsList[i]->sNalData.sVclNal.sSliceBitsRead;
pSliceBitsRead->pStartBuf = pSliceBitsRead->pStartBuf - pCtx->sRawData.pHead + pNewBsBuff;
pSliceBitsRead->pEndBuf = pSliceBitsRead->pEndBuf - pCtx->sRawData.pHead + pNewBsBuff;
pSliceBitsRead->pCurBuf = pSliceBitsRead->pCurBuf - pCtx->sRawData.pHead + pNewBsBuff;
}
//Copy current buffer status to new buffer
memcpy (pNewBsBuff, pCtx->sRawData.pHead, pCtx->iMaxBsBufferSizeInByte);
pCtx->iMaxBsBufferSizeInByte = iNewBuffLen;
pCtx->sRawData.pStartPos = pNewBsBuff + (pCtx->sRawData.pStartPos - pCtx->sRawData.pHead);
pCtx->sRawData.pCurPos = pNewBsBuff + (pCtx->sRawData.pCurPos - pCtx->sRawData.pHead);
pCtx->sRawData.pEnd = pNewBsBuff + iNewBuffLen;
WelsFree (pCtx->sRawData.pHead, "pCtx->sRawData.pHead");
pCtx->sRawData.pHead = pNewBsBuff;
return ERR_NONE;
}
int32_t CheckBsBuffer (PWelsDecoderContext pCtx, const int32_t kiSrcLen) {
if (kiSrcLen > MAX_ACCESS_UNIT_CAPACITY) { //exceeds max allowed data
WelsLog (& (pCtx->sLogCtx), WELS_LOG_WARNING, "Max AU size exceeded. Allowed size = %d, current size = %d",
MAX_ACCESS_UNIT_CAPACITY,
kiSrcLen);
pCtx->iErrorCode |= dsBitstreamError;
return ERR_INFO_INVALID_ACCESS;
} else if (kiSrcLen > pCtx->iMaxBsBufferSizeInByte /
MAX_BUFFERED_NUM) { //may lead to buffer overwrite, prevent it by expanding buffer
if (ExpandBsBuffer (pCtx, kiSrcLen)) {
return ERR_INFO_OUT_OF_MEMORY;
}
}
return ERR_NONE;
}
/*
* WelsInitMemory
* Memory request for new introduced data
* Especially for:
* rbsp_au_buffer, cur_dq_layer_ptr and ref_dq_layer_ptr in MB info cache.
* return:
* 0 - success; otherwise returned error_no defined in error_no.h.
*/
int32_t WelsInitMemory (PWelsDecoderContext pCtx) {
if (pCtx == NULL) {
return ERR_INFO_INVALID_PTR;
}
if (MemInitNalList (&pCtx->pAccessUnitList, MAX_NAL_UNIT_NUM_IN_AU) != 0)
return ERR_INFO_OUT_OF_MEMORY;
if (InitBsBuffer (pCtx) != 0)
return ERR_INFO_OUT_OF_MEMORY;
pCtx->uiTargetDqId = (uint8_t) - 1;
pCtx->bEndOfStreamFlag = false;
pCtx->iImgWidthInPixel = 0;
pCtx->iImgHeightInPixel = 0;
return ERR_NONE;
}
/*
* WelsFreeMemory
* Free memory introduced in WelsInitMemory at destruction of decoder.
*
*/
void WelsFreeMemory (PWelsDecoderContext pCtx) {
if (pCtx == NULL)
return;
if (NULL != pCtx->pParam) {
WelsFree (pCtx->pParam, "pCtx->pParam");
pCtx->pParam = NULL;
}
MemFreeNalList (&pCtx->pAccessUnitList);
if (pCtx->sRawData.pHead) {
WelsFree (pCtx->sRawData.pHead, "pCtx->sRawData->pHead");
}
pCtx->sRawData.pHead = NULL;
pCtx->sRawData.pEnd = NULL;
pCtx->sRawData.pStartPos = NULL;
pCtx->sRawData.pCurPos = NULL;
}
/*
* DecodeNalHeaderExt
* Trigger condition: NAL_UNIT_TYPE = NAL_UNIT_PREFIX or NAL_UNIT_CODED_SLICE_EXT
* Parameter:
* pNal: target NALUnit ptr
* pSrc: NAL Unit bitstream
*/
void DecodeNalHeaderExt (PNalUnit pNal, uint8_t* pSrc) {
PNalUnitHeaderExt pHeaderExt = &pNal->sNalHeaderExt;
uint8_t uiCurByte = *pSrc;
pHeaderExt->bIdrFlag = !! (uiCurByte & 0x40);
pHeaderExt->uiPriorityId = uiCurByte & 0x3F;
uiCurByte = * (++pSrc);
pHeaderExt->iNoInterLayerPredFlag = uiCurByte >> 7;
pHeaderExt->uiDependencyId = (uiCurByte & 0x70) >> 4;
pHeaderExt->uiQualityId = uiCurByte & 0x0F;
uiCurByte = * (++pSrc);
pHeaderExt->uiTemporalId = uiCurByte >> 5;
pHeaderExt->bUseRefBasePicFlag = !! (uiCurByte & 0x10);
pHeaderExt->bDiscardableFlag = !! (uiCurByte & 0x08);
pHeaderExt->bOutputFlag = !! (uiCurByte & 0x04);
pHeaderExt->uiReservedThree2Bits = uiCurByte & 0x03;
pHeaderExt->uiLayerDqId = (pHeaderExt->uiDependencyId << 4) | pHeaderExt->uiQualityId;
}
#define SLICE_HEADER_IDR_PIC_ID_MAX 65535
#define SLICE_HEADER_REDUNDANT_PIC_CNT_MAX 127
#define SLICE_HEADER_ALPHAC0_BETA_OFFSET_MIN -12
#define SLICE_HEADER_ALPHAC0_BETA_OFFSET_MAX 12
#define SLICE_HEADER_INTER_LAYER_ALPHAC0_BETA_OFFSET_MIN -12
#define SLICE_HEADER_INTER_LAYER_ALPHAC0_BETA_OFFSET_MAX 12
#define MAX_NUM_REF_IDX_L0_ACTIVE_MINUS1 15
/*
* decode_slice_header_avc
* Parse slice header of bitstream in avc for storing data structure
*/
int32_t ParseSliceHeaderSyntaxs (PWelsDecoderContext pCtx, PBitStringAux pBs, const bool kbExtensionFlag) {
PNalUnit const kpCurNal = pCtx->pAccessUnitList->pNalUnitsList[pCtx->pAccessUnitList->uiAvailUnitsNum - 1];
PNalUnitHeaderExt pNalHeaderExt = NULL;
PSliceHeader pSliceHead = NULL;
PSliceHeaderExt pSliceHeadExt = NULL;
PSubsetSps pSubsetSps = NULL;
PSps pSps = NULL;
PPps pPps = NULL;
EWelsNalUnitType eNalType = static_cast<EWelsNalUnitType> (0);
int32_t iPpsId = 0;
int32_t iRet = ERR_NONE;
uint8_t uiSliceType = 0;
uint8_t uiQualityId = BASE_QUALITY_ID;
bool bIdrFlag = false;
bool bSgChangeCycleInvolved = false; // involved slice group change cycle ?
uint32_t uiCode;
int32_t iCode;
SLogContext* pLogCtx = & (pCtx->sLogCtx);
if (kpCurNal == NULL) {
return ERR_INFO_OUT_OF_MEMORY;
}
pNalHeaderExt = &kpCurNal->sNalHeaderExt;
pSliceHead = &kpCurNal->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader;
eNalType = pNalHeaderExt->sNalUnitHeader.eNalUnitType;
pSliceHeadExt = &kpCurNal->sNalData.sVclNal.sSliceHeaderExt;
if (pSliceHeadExt) {
SRefBasePicMarking sBaseMarking;
const bool kbStoreRefBaseFlag = pSliceHeadExt->bStoreRefBasePicFlag;
memcpy (&sBaseMarking, &pSliceHeadExt->sRefBasePicMarking, sizeof (SRefBasePicMarking)); //confirmed_safe_unsafe_usage
memset (pSliceHeadExt, 0, sizeof (SSliceHeaderExt));
pSliceHeadExt->bStoreRefBasePicFlag = kbStoreRefBaseFlag;
memcpy (&pSliceHeadExt->sRefBasePicMarking, &sBaseMarking, sizeof (SRefBasePicMarking)); //confirmed_safe_unsafe_usage
}
kpCurNal->sNalData.sVclNal.bSliceHeaderExtFlag = kbExtensionFlag;
// first_mb_in_slice
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //first_mb_in_slice
pSliceHead->iFirstMbInSlice = uiCode;
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //slice_type
uiSliceType = uiCode;
if (uiSliceType > 9) {
WelsLog (pLogCtx, WELS_LOG_WARNING, "slice type too large (%d) at first_mb(%d)", uiSliceType,
pSliceHead->iFirstMbInSlice);
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_INVALID_SLICE_TYPE);
}
if (uiSliceType > 4)
uiSliceType -= 5;
if (B_SLICE == uiSliceType) {
WelsLog (pLogCtx, WELS_LOG_WARNING, "ParseSliceHeaderSyntaxs(): B slice not supported.");
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_UNSUPPORTED_BIPRED);
}
if ((NAL_UNIT_CODED_SLICE_IDR == eNalType) && (I_SLICE != uiSliceType)) {
WelsLog (pLogCtx, WELS_LOG_WARNING, "Invalid slice type(%d) in IDR picture. ", uiSliceType);
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_INVALID_SLICE_TYPE);
}
if (kbExtensionFlag) {
if (uiSliceType > 2) {
WelsLog (pLogCtx, WELS_LOG_WARNING, "Invalid slice type(%d).", uiSliceType);
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_INVALID_SLICE_TYPE);
}
}
pSliceHead->eSliceType = static_cast <EWelsSliceType> (uiSliceType);
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //pic_parameter_set_id
iPpsId = uiCode;
if (iPpsId >= MAX_PPS_COUNT) {
WelsLog (pLogCtx, WELS_LOG_WARNING, "iPpsId out of range");
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_PPS_ID_OVERFLOW);
}
//add check PPS available here
if (pCtx->bPpsAvailFlags[iPpsId] == false) {
WelsLog (pLogCtx, WELS_LOG_ERROR, "PPS id is invalid!");
pCtx->iErrorCode |= dsNoParamSets;
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_INVALID_PPS_ID);
}
pPps = &pCtx->sPpsBuffer[iPpsId];
if (pPps->uiNumSliceGroups == 0) {
WelsLog (pLogCtx, WELS_LOG_WARNING, "Invalid PPS referenced");
pCtx->iErrorCode |= dsNoParamSets;
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_NO_PARAM_SETS);
}
if (kbExtensionFlag) {
pSubsetSps = &pCtx->sSubsetSpsBuffer[pPps->iSpsId];
pSps = &pSubsetSps->sSps;
if (pCtx->bSubspsAvailFlags[pPps->iSpsId] == false) {
WelsLog (pLogCtx, WELS_LOG_ERROR, "SPS id is invalid!");
pCtx->iErrorCode |= dsNoParamSets;
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_INVALID_SPS_ID);
}
} else {
if (pCtx->bSpsAvailFlags[pPps->iSpsId] == false) {
WelsLog (pLogCtx, WELS_LOG_ERROR, "SPS id is invalid!");
pCtx->iErrorCode |= dsNoParamSets;
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_INVALID_SPS_ID);
}
pSps = &pCtx->sSpsBuffer[pPps->iSpsId];
}
pSliceHead->iPpsId = iPpsId;
pSliceHead->iSpsId = pPps->iSpsId;
pSliceHead->pPps = pPps;
pSliceHead->pSps = pSps;
pSliceHeadExt->pSubsetSps = pSubsetSps;
bIdrFlag = (!kbExtensionFlag && eNalType == NAL_UNIT_CODED_SLICE_IDR) || (kbExtensionFlag && pNalHeaderExt->bIdrFlag);
if (pSps->uiLog2MaxFrameNum == 0) {
WelsLog (pLogCtx, WELS_LOG_WARNING, "non existing SPS referenced");
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_NO_PARAM_SETS);
}
// check first_mb_in_slice
WELS_CHECK_SE_UPPER_ERROR ((uint32_t) (pSliceHead->iFirstMbInSlice), pSps->uiTotalMbCount, "first_mb_in_slice",
GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_INVALID_FIRST_MB_IN_SLICE));
WELS_READ_VERIFY (BsGetBits (pBs, pSps->uiLog2MaxFrameNum, &uiCode)); //frame_num
pSliceHead->iFrameNum = uiCode;
pSliceHead->bFieldPicFlag = false;
pSliceHead->bBottomFiledFlag = false;
if (!pSps->bFrameMbsOnlyFlag) {
WelsLog (pLogCtx, WELS_LOG_WARNING, "ParseSliceHeaderSyntaxs(): frame_mbs_only_flag = %d not supported. ",
pSps->bFrameMbsOnlyFlag);
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_UNSUPPORTED_MBAFF);
}
pSliceHead->iMbWidth = pSps->iMbWidth;
pSliceHead->iMbHeight = pSps->iMbHeight / (1 + pSliceHead->bFieldPicFlag);
if (bIdrFlag) {
if (pSliceHead->iFrameNum != 0) {
WelsLog (pLogCtx, WELS_LOG_WARNING,
"ParseSliceHeaderSyntaxs(), invaild frame number: %d due to IDR frame introduced!",
pSliceHead->iFrameNum);
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_INVALID_FRAME_NUM);
}
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //idr_pic_id
// standard 7.4.3 idr_pic_id should be in range 0 to 65535, inclusive.
WELS_CHECK_SE_UPPER_ERROR (uiCode, SLICE_HEADER_IDR_PIC_ID_MAX, "idr_pic_id", GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER,
ERR_INFO_INVALID_IDR_PIC_ID));
pSliceHead->uiIdrPicId = uiCode; /* uiIdrPicId */
#ifdef LONG_TERM_REF
pCtx->uiCurIdrPicId = pSliceHead->uiIdrPicId;
#endif
}
pSliceHead->iDeltaPicOrderCntBottom = 0;
pSliceHead->iDeltaPicOrderCnt[0] =
pSliceHead->iDeltaPicOrderCnt[1] = 0;
if (pSps->uiPocType == 0) {
WELS_READ_VERIFY (BsGetBits (pBs, pSps->iLog2MaxPocLsb, &uiCode)); //pic_order_cnt_lsb
pSliceHead->iPicOrderCntLsb = uiCode;
if (pPps->bPicOrderPresentFlag && !pSliceHead->bFieldPicFlag) {
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //delta_pic_order_cnt_bottom
pSliceHead->iDeltaPicOrderCntBottom = iCode;
}
} else if (pSps->uiPocType == 1 && !pSps->bDeltaPicOrderAlwaysZeroFlag) {
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //delta_pic_order_cnt[ 0 ]
pSliceHead->iDeltaPicOrderCnt[0] = iCode;
if (pPps->bPicOrderPresentFlag && !pSliceHead->bFieldPicFlag) {
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //delta_pic_order_cnt[ 1 ]
pSliceHead->iDeltaPicOrderCnt[1] = iCode;
}
}
pSliceHead->iRedundantPicCnt = 0;
if (pPps->bRedundantPicCntPresentFlag) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //redundant_pic_cnt
// standard section 7.4.3, redundant_pic_cnt should be in range 0 to 127, inclusive.
WELS_CHECK_SE_UPPER_ERROR (uiCode, SLICE_HEADER_REDUNDANT_PIC_CNT_MAX, "redundant_pic_cnt",
GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_INVALID_REDUNDANT_PIC_CNT));
pSliceHead->iRedundantPicCnt = uiCode;
}
//set defaults, might be overriden a few line later
pSliceHead->uiRefCount[0] = pPps->uiNumRefIdxL0Active;
pSliceHead->uiRefCount[1] = pPps->uiNumRefIdxL1Active;
bool bReadNumRefFlag = (P_SLICE == uiSliceType);
if (kbExtensionFlag) {
bReadNumRefFlag &= (BASE_QUALITY_ID == pNalHeaderExt->uiQualityId);
}
if (bReadNumRefFlag) {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //num_ref_idx_active_override_flag
pSliceHead->bNumRefIdxActiveOverrideFlag = !!uiCode;
if (pSliceHead->bNumRefIdxActiveOverrideFlag) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //num_ref_idx_l0_active_minus1
WELS_CHECK_SE_UPPER_ERROR (uiCode, MAX_NUM_REF_IDX_L0_ACTIVE_MINUS1, "num_ref_idx_l0_active_minus1",
GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_INVALID_NUM_REF_IDX_L0_ACTIVE_MINUS1));
pSliceHead->uiRefCount[0] = 1 + uiCode;
}
}
if (pSliceHead->uiRefCount[0] > MAX_REF_PIC_COUNT || pSliceHead->uiRefCount[1] > MAX_REF_PIC_COUNT) {
WelsLog (pLogCtx, WELS_LOG_WARNING, "reference overflow");
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_REF_COUNT_OVERFLOW);
}
if (BASE_QUALITY_ID == uiQualityId) {
iRet = ParseRefPicListReordering (pBs, pSliceHead);
if (iRet != ERR_NONE) {
WelsLog (pLogCtx, WELS_LOG_WARNING, "invalid ref pPic list reordering syntaxs!");
return iRet;
}
if (kbExtensionFlag) {
if (pNalHeaderExt->iNoInterLayerPredFlag || pNalHeaderExt->uiQualityId > 0)
pSliceHeadExt->bBasePredWeightTableFlag = false;
else
pSliceHeadExt->bBasePredWeightTableFlag = true;
}
if (kpCurNal->sNalHeaderExt.sNalUnitHeader.uiNalRefIdc != 0) {
iRet = ParseDecRefPicMarking (pCtx, pBs, pSliceHead, pSps, bIdrFlag);
if (iRet != ERR_NONE) {
return iRet;
}
if (kbExtensionFlag && !pSubsetSps->sSpsSvcExt.bSliceHeaderRestrictionFlag) {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //store_ref_base_pic_flag
pSliceHeadExt->bStoreRefBasePicFlag = !!uiCode;
if ((pNalHeaderExt->bUseRefBasePicFlag || pSliceHeadExt->bStoreRefBasePicFlag) && !bIdrFlag) {
WelsLog (pLogCtx, WELS_LOG_WARNING,
"ParseSliceHeaderSyntaxs(): bUseRefBasePicFlag or bStoreRefBasePicFlag = 1 not supported.");
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_UNSUPPORTED_ILP);
}
}
}
}
if (pPps->bEntropyCodingModeFlag) {
WelsLog (pLogCtx, WELS_LOG_WARNING, "ParseSliceHeaderSyntaxs(): CABAC in Enhancement layer not supported.");
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_UNSUPPORTED_CABAC_EL);
}
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //slice_qp_delta
pSliceHead->iSliceQpDelta = iCode;
pSliceHead->iSliceQp = pPps->iPicInitQp + pSliceHead->iSliceQpDelta;
if (pSliceHead->iSliceQp < 0 || pSliceHead->iSliceQp > 51) {
WelsLog (pLogCtx, WELS_LOG_WARNING, "QP %d out of range", pSliceHead->iSliceQp);
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_INVALID_QP);
}
//FIXME qscale / qp ... stuff
if (!kbExtensionFlag) {
if (uiSliceType == SP_SLICE || uiSliceType == SI_SLICE) {
WelsLog (pLogCtx, WELS_LOG_WARNING, "SP/SI not supported");
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_UNSUPPORTED_SPSI);
}
}
pSliceHead->uiDisableDeblockingFilterIdc = 0;
pSliceHead->iSliceAlphaC0Offset = 0;
pSliceHead->iSliceBetaOffset = 0;
if (pPps->bDeblockingFilterControlPresentFlag) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //disable_deblocking_filter_idc
pSliceHead->uiDisableDeblockingFilterIdc = uiCode;
//refer to JVT-X201wcm1.doc G.7.4.3.4--2010.4.20
if (pSliceHead->uiDisableDeblockingFilterIdc > 6) {
WelsLog (pLogCtx, WELS_LOG_WARNING, "disable_deblock_filter_idc (%d) out of range [0, 6]",
pSliceHead->uiDisableDeblockingFilterIdc);
return ERR_INFO_INVALID_DBLOCKING_IDC;
}
if (pSliceHead->uiDisableDeblockingFilterIdc != 1) {
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //slice_alpha_c0_offset_div2
pSliceHead->iSliceAlphaC0Offset = iCode * 2;
WELS_CHECK_SE_BOTH_ERROR (pSliceHead->iSliceAlphaC0Offset, SLICE_HEADER_ALPHAC0_BETA_OFFSET_MIN,
SLICE_HEADER_ALPHAC0_BETA_OFFSET_MAX, "slice_alpha_c0_offset_div2 * 2", GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER,
ERR_INFO_INVALID_SLICE_ALPHA_C0_OFFSET_DIV2));
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //slice_beta_offset_div2
pSliceHead->iSliceBetaOffset = iCode * 2;
WELS_CHECK_SE_BOTH_ERROR (pSliceHead->iSliceBetaOffset, SLICE_HEADER_ALPHAC0_BETA_OFFSET_MIN,
SLICE_HEADER_ALPHAC0_BETA_OFFSET_MAX, "slice_beta_offset_div2 * 2", GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER,
ERR_INFO_INVALID_SLICE_BETA_OFFSET_DIV2));
}
}
bSgChangeCycleInvolved = (pPps->uiNumSliceGroups > 1 && pPps->uiSliceGroupMapType >= 3
&& pPps->uiSliceGroupMapType <= 5);
if (kbExtensionFlag && bSgChangeCycleInvolved)
bSgChangeCycleInvolved = (bSgChangeCycleInvolved && (uiQualityId == BASE_QUALITY_ID));
if (bSgChangeCycleInvolved) {
if (pPps->uiSliceGroupChangeRate > 0) {
const int32_t kiNumBits = (int32_t)WELS_CEIL (log (static_cast<double> (1 + pPps->uiPicSizeInMapUnits /
pPps->uiSliceGroupChangeRate)));
WELS_READ_VERIFY (BsGetBits (pBs, kiNumBits, &uiCode)); //lice_group_change_cycle
pSliceHead->iSliceGroupChangeCycle = uiCode;
} else
pSliceHead->iSliceGroupChangeCycle = 0;
}
if (!kbExtensionFlag) {
FillDefaultSliceHeaderExt (pSliceHeadExt, pNalHeaderExt);
} else {
/* Extra syntax elements newly introduced */
pSliceHeadExt->pSubsetSps = pSubsetSps;
if (!pNalHeaderExt->iNoInterLayerPredFlag && BASE_QUALITY_ID == uiQualityId) {
//the following should be deleted for CODE_CLEAN
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //ref_layer_dq_id
pSliceHeadExt->uiRefLayerDqId = uiCode;
if (pSubsetSps->sSpsSvcExt.bInterLayerDeblockingFilterCtrlPresentFlag) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //disable_inter_layer_deblocking_filter_idc
pSliceHeadExt->uiDisableInterLayerDeblockingFilterIdc = uiCode;
//refer to JVT-X201wcm1.doc G.7.4.3.4--2010.4.20
if (pSliceHeadExt->uiDisableInterLayerDeblockingFilterIdc > 6) {
WelsLog (& (pCtx->sLogCtx), WELS_LOG_WARNING, "disable_inter_layer_deblock_filter_idc (%d) out of range [0, 6]",
pSliceHeadExt->uiDisableInterLayerDeblockingFilterIdc);
return ERR_INFO_INVALID_DBLOCKING_IDC;
}
if (pSliceHeadExt->uiDisableInterLayerDeblockingFilterIdc != 1) {
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //inter_layer_slice_alpha_c0_offset_div2
pSliceHeadExt->iInterLayerSliceAlphaC0Offset = iCode * 2;
WELS_CHECK_SE_BOTH_ERROR (pSliceHeadExt->iInterLayerSliceAlphaC0Offset,
SLICE_HEADER_INTER_LAYER_ALPHAC0_BETA_OFFSET_MIN, SLICE_HEADER_INTER_LAYER_ALPHAC0_BETA_OFFSET_MAX,
"inter_layer_alpha_c0_offset_div2 * 2", GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER,
ERR_INFO_INVALID_SLICE_ALPHA_C0_OFFSET_DIV2));
WELS_READ_VERIFY (BsGetSe (pBs, &iCode)); //inter_layer_slice_beta_offset_div2
pSliceHeadExt->iInterLayerSliceBetaOffset = iCode * 2;
WELS_CHECK_SE_BOTH_ERROR (pSliceHeadExt->iInterLayerSliceBetaOffset, SLICE_HEADER_INTER_LAYER_ALPHAC0_BETA_OFFSET_MIN,
SLICE_HEADER_INTER_LAYER_ALPHAC0_BETA_OFFSET_MAX, "inter_layer_slice_beta_offset_div2 * 2",
GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_INVALID_SLICE_BETA_OFFSET_DIV2));
}
}
pSliceHeadExt->uiRefLayerChromaPhaseXPlus1Flag = pSubsetSps->sSpsSvcExt.uiSeqRefLayerChromaPhaseXPlus1Flag;
pSliceHeadExt->uiRefLayerChromaPhaseYPlus1 = pSubsetSps->sSpsSvcExt.uiSeqRefLayerChromaPhaseYPlus1;
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //constrained_intra_resampling_flag
pSliceHeadExt->bConstrainedIntraResamplingFlag = !!uiCode;
{
SPosOffset pos;
pos.iLeftOffset = pSubsetSps->sSpsSvcExt.sSeqScaledRefLayer.iLeftOffset;
pos.iTopOffset = pSubsetSps->sSpsSvcExt.sSeqScaledRefLayer.iTopOffset * (2 - pSps->bFrameMbsOnlyFlag);
pos.iRightOffset = pSubsetSps->sSpsSvcExt.sSeqScaledRefLayer.iRightOffset;
pos.iBottomOffset = pSubsetSps->sSpsSvcExt.sSeqScaledRefLayer.iBottomOffset * (2 - pSps->bFrameMbsOnlyFlag);
//memcpy(&pSliceHeadExt->sScaledRefLayer, &pos, sizeof(SPosOffset));//confirmed_safe_unsafe_usage
pSliceHeadExt->iScaledRefLayerPicWidthInSampleLuma = (pSliceHead->iMbWidth << 4) - (pos.iLeftOffset + pos.iRightOffset);
pSliceHeadExt->iScaledRefLayerPicHeightInSampleLuma = (pSliceHead->iMbHeight << 4) -
(pos.iTopOffset + pos.iBottomOffset) / (1 + pSliceHead->bFieldPicFlag);
}
} else if (uiQualityId > BASE_QUALITY_ID) {
WelsLog (pLogCtx, WELS_LOG_WARNING, "MGS not supported.");
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_UNSUPPORTED_MGS);
} else {
pSliceHeadExt->uiRefLayerDqId = (uint8_t) - 1;
}
pSliceHeadExt->bSliceSkipFlag = false;
pSliceHeadExt->bAdaptiveBaseModeFlag = false;
pSliceHeadExt->bDefaultBaseModeFlag = false;
pSliceHeadExt->bAdaptiveMotionPredFlag = false;
pSliceHeadExt->bDefaultMotionPredFlag = false;
pSliceHeadExt->bAdaptiveResidualPredFlag = false;
pSliceHeadExt->bDefaultResidualPredFlag = false;
if (pNalHeaderExt->iNoInterLayerPredFlag)
pSliceHeadExt->bTCoeffLevelPredFlag = false;
else
pSliceHeadExt->bTCoeffLevelPredFlag = pSubsetSps->sSpsSvcExt.bSeqTCoeffLevelPredFlag;
if (!pNalHeaderExt->iNoInterLayerPredFlag) {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //slice_skip_flag
pSliceHeadExt->bSliceSkipFlag = !!uiCode;
if (pSliceHeadExt->bSliceSkipFlag) {
WELS_READ_VERIFY (BsGetUe (pBs, &uiCode)); //num_mbs_in_slice_minus1
pSliceHeadExt->uiNumMbsInSlice = 1 + uiCode;
} else {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //adaptive_base_mode_flag
pSliceHeadExt->bAdaptiveBaseModeFlag = !!uiCode;
if (!pSliceHeadExt->bAdaptiveBaseModeFlag) {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //default_base_mode_flag
pSliceHeadExt->bDefaultBaseModeFlag = !!uiCode;
}
if (!pSliceHeadExt->bDefaultBaseModeFlag) {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //adaptive_motion_prediction_flag
pSliceHeadExt->bAdaptiveMotionPredFlag = !!uiCode;
if (!pSliceHeadExt->bAdaptiveMotionPredFlag) {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //default_motion_prediction_flag
pSliceHeadExt->bDefaultMotionPredFlag = !!uiCode;
}
}
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //adaptive_residual_prediction_flag
pSliceHeadExt->bAdaptiveResidualPredFlag = !!uiCode;
if (!pSliceHeadExt->bAdaptiveResidualPredFlag) {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //default_residual_prediction_flag
pSliceHeadExt->bDefaultResidualPredFlag = !!uiCode;
}
}
if (pSubsetSps->sSpsSvcExt.bAdaptiveTCoeffLevelPredFlag) {
WELS_READ_VERIFY (BsGetOneBit (pBs, &uiCode)); //tcoeff_level_prediction_flag
pSliceHeadExt->bTCoeffLevelPredFlag = !!uiCode;
}
}
if (!pSubsetSps->sSpsSvcExt.bSliceHeaderRestrictionFlag) {
WELS_READ_VERIFY (BsGetBits (pBs, 4, &uiCode)); //scan_idx_start
pSliceHeadExt->uiScanIdxStart = uiCode;
WELS_READ_VERIFY (BsGetBits (pBs, 4, &uiCode)); //scan_idx_end
pSliceHeadExt->uiScanIdxEnd = uiCode;
if (pSliceHeadExt->uiScanIdxStart != 0 || pSliceHeadExt->uiScanIdxEnd != 15) {
WelsLog (pLogCtx, WELS_LOG_WARNING, "uiScanIdxStart (%d) != 0 and uiScanIdxEnd (%d) !=15 not supported here",
pSliceHeadExt->uiScanIdxStart, pSliceHeadExt->uiScanIdxEnd);
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_UNSUPPORTED_MGS);
}
} else {
pSliceHeadExt->uiScanIdxStart = 0;
pSliceHeadExt->uiScanIdxEnd = 15;
}
}
return ERR_NONE;
}
/*
* Copy relative syntax elements of NALUnitHeaderExt, sRefPicBaseMarking and bStoreRefBasePicFlag in prefix nal unit.
* pSrc: mark as decoded prefix NAL
* ppDst: succeeded VCL NAL based AVC (I/P Slice)
*/
bool PrefetchNalHeaderExtSyntax (PWelsDecoderContext pCtx, PNalUnit const kppDst, PNalUnit const kpSrc) {
PNalUnitHeaderExt pNalHdrExtD = NULL, pNalHdrExtS = NULL;
PSliceHeaderExt pShExtD = NULL;
PPrefixNalUnit pPrefixS = NULL;
PSps pSps = NULL;
int32_t iIdx = 0;
if (kppDst == NULL || kpSrc == NULL)
return false;
pNalHdrExtD = &kppDst->sNalHeaderExt;
pNalHdrExtS = &kpSrc->sNalHeaderExt;
pShExtD = &kppDst->sNalData.sVclNal.sSliceHeaderExt;
pPrefixS = &kpSrc->sNalData.sPrefixNal;
pSps = &pCtx->sSpsBuffer[pCtx->sPpsBuffer[pShExtD->sSliceHeader.iPpsId].iSpsId];
pNalHdrExtD->uiDependencyId = pNalHdrExtS->uiDependencyId;
pNalHdrExtD->uiQualityId = pNalHdrExtS->uiQualityId;
pNalHdrExtD->uiTemporalId = pNalHdrExtS->uiTemporalId;
pNalHdrExtD->uiPriorityId = pNalHdrExtS->uiPriorityId;
pNalHdrExtD->bIdrFlag = pNalHdrExtS->bIdrFlag;
pNalHdrExtD->iNoInterLayerPredFlag = pNalHdrExtS->iNoInterLayerPredFlag;
pNalHdrExtD->bDiscardableFlag = pNalHdrExtS->bDiscardableFlag;
pNalHdrExtD->bOutputFlag = pNalHdrExtS->bOutputFlag;
pNalHdrExtD->bUseRefBasePicFlag = pNalHdrExtS->bUseRefBasePicFlag;
pNalHdrExtD->uiLayerDqId = pNalHdrExtS->uiLayerDqId;
pShExtD->bStoreRefBasePicFlag = pPrefixS->bStoreRefBasePicFlag;
memcpy (&pShExtD->sRefBasePicMarking, &pPrefixS->sRefPicBaseMarking,
sizeof (SRefBasePicMarking)); //confirmed_safe_unsafe_usage
if (pShExtD->sRefBasePicMarking.bAdaptiveRefBasePicMarkingModeFlag) {
PRefBasePicMarking pRefBasePicMarking = &pShExtD->sRefBasePicMarking;
iIdx = 0;
do {
if (pRefBasePicMarking->mmco_base[iIdx].uiMmcoType == MMCO_END)
break;
if (pRefBasePicMarking->mmco_base[iIdx].uiMmcoType == MMCO_SHORT2UNUSED)
pRefBasePicMarking->mmco_base[iIdx].iShortFrameNum = (pShExtD->sSliceHeader.iFrameNum -
pRefBasePicMarking->mmco_base[iIdx].uiDiffOfPicNums) & ((1 << pSps->uiLog2MaxFrameNum) - 1);
++ iIdx;
} while (iIdx < MAX_MMCO_COUNT);
}
return true;
}
int32_t UpdateAccessUnit (PWelsDecoderContext pCtx) {
PAccessUnit pCurAu = pCtx->pAccessUnitList;
int32_t iIdx = pCurAu->uiEndPos;
// Conversed iterator
pCtx->uiTargetDqId = pCurAu->pNalUnitsList[iIdx]->sNalHeaderExt.uiLayerDqId;
pCurAu->uiActualUnitsNum = iIdx + 1;
pCurAu->bCompletedAuFlag = true;
// Added for mosaic avoidance, 11/19/2009
#ifdef LONG_TERM_REF
if (pCtx->bParamSetsLostFlag || pCtx->bNewSeqBegin)
#else
if (pCtx->bReferenceLostAtT0Flag || pCtx->bNewSeqBegin)
#endif
{
uint32_t uiActualIdx = 0;
while (uiActualIdx < pCurAu->uiActualUnitsNum) {
PNalUnit nal = pCurAu->pNalUnitsList[uiActualIdx];
if (nal->sNalHeaderExt.sNalUnitHeader.eNalUnitType == NAL_UNIT_CODED_SLICE_IDR || nal->sNalHeaderExt.bIdrFlag) {
break;
}
++ uiActualIdx;
}
if (uiActualIdx ==
pCurAu->uiActualUnitsNum) { // no found IDR nal within incoming AU, need exit to avoid mosaic issue, 11/19/2009
WelsLog (& (pCtx->sLogCtx), WELS_LOG_WARNING,
"UpdateAccessUnit():::::Key frame lost.....CAN NOT find IDR from current AU.");
pCtx->iErrorCode |= dsRefLost;
if (pCtx->eErrorConMethod == ERROR_CON_DISABLE) {
#ifdef LONG_TERM_REF
pCtx->iErrorCode |= dsNoParamSets;
return dsNoParamSets;
#else
pCtx->iErrorCode |= dsRefLost;
return ERR_INFO_REFERENCE_PIC_LOST;
#endif
}
}
}
return ERR_NONE;
}
int32_t InitialDqLayersContext (PWelsDecoderContext pCtx, const int32_t kiMaxWidth, const int32_t kiMaxHeight) {
int32_t i = 0;
WELS_VERIFY_RETURN_IF (ERR_INFO_INVALID_PARAM, (NULL == pCtx || kiMaxWidth <= 0 || kiMaxHeight <= 0))
pCtx->sMb.iMbWidth = (kiMaxWidth + 15) >> 4;
pCtx->sMb.iMbHeight = (kiMaxHeight + 15) >> 4;
if (pCtx->bInitialDqLayersMem && kiMaxWidth <= pCtx->iPicWidthReq
&& kiMaxHeight <= pCtx->iPicHeightReq) // have same dimension memory, skipped
return ERR_NONE;
UninitialDqLayersContext (pCtx);
do {
PDqLayer pDq = (PDqLayer)WelsMalloc (sizeof (SDqLayer), "PDqLayer");
if (pDq == NULL)
return ERR_INFO_OUT_OF_MEMORY;
memset (pDq, 0, sizeof (SDqLayer));
pCtx->sMb.pMbType[i] = (int8_t*)WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (int8_t),
"pCtx->sMb.pMbType[]");
pCtx->sMb.pMv[i][0] = (int16_t (*)[16][2])WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (
int16_t) * MV_A * MB_BLOCK4x4_NUM, "pCtx->sMb.pMv[][]");
pCtx->sMb.pRefIndex[i][0] = (int8_t (*)[MB_BLOCK4x4_NUM])WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (
int8_t) * MB_BLOCK4x4_NUM, "pCtx->sMb.pRefIndex[][]");
pCtx->sMb.pLumaQp[i] = (int8_t*)WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (int8_t),
"pCtx->sMb.pLumaQp[]");
pCtx->sMb.pChromaQp[i] = (int8_t*)WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (int8_t),
"pCtx->sMb.pChromaQp[]");
pCtx->sMb.pNzc[i] = (int8_t (*)[24])WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (int8_t) * 24,
"pCtx->sMb.pNzc[]");
pCtx->sMb.pNzcRs[i] = (int8_t (*)[24])WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (int8_t) * 24,
"pCtx->sMb.pNzcRs[]");
pCtx->sMb.pScaledTCoeff[i] = (int16_t (*)[MB_COEFF_LIST_SIZE])WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight *
sizeof (int16_t) * MB_COEFF_LIST_SIZE, "pCtx->sMb.pScaledTCoeff[]");
pCtx->sMb.pIntraPredMode[i] = (int8_t (*)[8])WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (int8_t) * 8,
"pCtx->sMb.pIntraPredMode[]");
pCtx->sMb.pIntra4x4FinalMode[i] = (int8_t (*)[MB_BLOCK4x4_NUM])WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight *
sizeof (int8_t) * MB_BLOCK4x4_NUM, "pCtx->sMb.pIntra4x4FinalMode[]");
pCtx->sMb.pChromaPredMode[i] = (int8_t*)WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (int8_t),
"pCtx->sMb.pChromaPredMode[]");
pCtx->sMb.pCbp[i] = (int8_t*)WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (int8_t),
"pCtx->sMb.pCbp[]");
pCtx->sMb.pSubMbType[i] = (int8_t (*)[MB_PARTITION_SIZE])WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (
int8_t) * MB_PARTITION_SIZE, "pCtx->sMb.pSubMbType[]");
pCtx->sMb.pSliceIdc[i] = (int32_t*) WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (int32_t),
"pCtx->sMb.pSliceIdc[]"); // using int32_t for slice_idc, 4/21/2010
if (pCtx->sMb.pSliceIdc[i] != NULL)
memset (pCtx->sMb.pSliceIdc[i], 0xff, (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (int32_t)));
pCtx->sMb.pResidualPredFlag[i] = (int8_t*) WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (int8_t),
"pCtx->sMb.pResidualPredFlag[]");
//pCtx->sMb.pMotionPredFlag[i] = (uint8_t *) WelsMalloc(pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof(uint8_t), "pCtx->sMb.pMotionPredFlag[]");
pCtx->sMb.pInterPredictionDoneFlag[i] = (int8_t*) WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (
int8_t), "pCtx->sMb.pInterPredictionDoneFlag[]");
pCtx->sMb.pMbCorrectlyDecodedFlag[i] = (bool*) WelsMalloc (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (bool),
"pCtx->sMb.pMbCorrectlyDecodedFlag[]");
// check memory block valid due above allocated..
WELS_VERIFY_RETURN_IF (ERR_INFO_OUT_OF_MEMORY,
((NULL == pCtx->sMb.pMbType[i]) ||
(NULL == pCtx->sMb.pMv[i][0]) ||
(NULL == pCtx->sMb.pRefIndex[i][0]) ||
(NULL == pCtx->sMb.pLumaQp[i]) ||
(NULL == pCtx->sMb.pChromaQp[i]) ||
(NULL == pCtx->sMb.pNzc[i]) ||
(NULL == pCtx->sMb.pNzcRs[i]) ||
(NULL == pCtx->sMb.pScaledTCoeff[i]) ||
(NULL == pCtx->sMb.pIntraPredMode[i]) ||
(NULL == pCtx->sMb.pIntra4x4FinalMode[i]) ||
(NULL == pCtx->sMb.pChromaPredMode[i]) ||
(NULL == pCtx->sMb.pCbp[i]) ||
(NULL == pCtx->sMb.pSubMbType[i]) ||
(NULL == pCtx->sMb.pSliceIdc[i]) ||
(NULL == pCtx->sMb.pResidualPredFlag[i]) ||
(NULL == pCtx->sMb.pInterPredictionDoneFlag[i]) ||
(NULL == pCtx->sMb.pMbCorrectlyDecodedFlag[i])
)
)
pCtx->pDqLayersList[i] = pDq;
++ i;
} while (i < LAYER_NUM_EXCHANGEABLE);
pCtx->bInitialDqLayersMem = true;
pCtx->iPicWidthReq = kiMaxWidth;
pCtx->iPicHeightReq = kiMaxHeight;
return ERR_NONE;
}
void UninitialDqLayersContext (PWelsDecoderContext pCtx) {
int32_t i = 0;
do {
PDqLayer pDq = pCtx->pDqLayersList[i];
if (pDq == NULL) {
++ i;
continue;
}
if (pCtx->sMb.pMbType[i]) {
WelsFree (pCtx->sMb.pMbType[i], "pCtx->sMb.pMbType[]");
pCtx->sMb.pMbType[i] = NULL;
}
if (pCtx->sMb.pMv[i][0]) {
WelsFree (pCtx->sMb.pMv[i][0], "pCtx->sMb.pMv[][]");
pCtx->sMb.pMv[i][0] = NULL;
}
if (pCtx->sMb.pRefIndex[i][0]) {
WelsFree (pCtx->sMb.pRefIndex[i][0], "pCtx->sMb.pRefIndex[][]");
pCtx->sMb.pRefIndex[i][0] = NULL;
}
if (pCtx->sMb.pLumaQp[i]) {
WelsFree (pCtx->sMb.pLumaQp[i], "pCtx->sMb.pLumaQp[]");
pCtx->sMb.pLumaQp[i] = NULL;
}
if (pCtx->sMb.pChromaQp[i]) {
WelsFree (pCtx->sMb.pChromaQp[i], "pCtx->sMb.pChromaQp[]");
pCtx->sMb.pChromaQp[i] = NULL;
}
if (pCtx->sMb.pNzc[i]) {
WelsFree (pCtx->sMb.pNzc[i], "pCtx->sMb.pNzc[]");
pCtx->sMb.pNzc[i] = NULL;
}
if (pCtx->sMb.pNzcRs[i]) {
WelsFree (pCtx->sMb.pNzcRs[i], "pCtx->sMb.pNzcRs[]");
pCtx->sMb.pNzcRs[i] = NULL;
}
if (pCtx->sMb.pScaledTCoeff[i]) {
WelsFree (pCtx->sMb.pScaledTCoeff[i], "pCtx->sMb.pScaledTCoeff[]");
pCtx->sMb.pScaledTCoeff[i] = NULL;
}
if (pCtx->sMb.pIntraPredMode[i]) {
WelsFree (pCtx->sMb.pIntraPredMode[i], "pCtx->sMb.pIntraPredMode[]");
pCtx->sMb.pIntraPredMode[i] = NULL;
}
if (pCtx->sMb.pIntra4x4FinalMode[i]) {
WelsFree (pCtx->sMb.pIntra4x4FinalMode[i], "pCtx->sMb.pIntra4x4FinalMode[]");
pCtx->sMb.pIntra4x4FinalMode[i] = NULL;
}
if (pCtx->sMb.pChromaPredMode[i]) {
WelsFree (pCtx->sMb.pChromaPredMode[i], "pCtx->sMb.pChromaPredMode[]");
pCtx->sMb.pChromaPredMode[i] = NULL;
}
if (pCtx->sMb.pCbp[i]) {
WelsFree (pCtx->sMb.pCbp[i], "pCtx->sMb.pCbp[]");
pCtx->sMb.pCbp[i] = NULL;
}
// if (pCtx->sMb.pMotionPredFlag[i])
//{
// WelsFree( pCtx->sMb.pMotionPredFlag[i], "pCtx->sMb.pMotionPredFlag[]" );
// pCtx->sMb.pMotionPredFlag[i] = NULL;
//}
if (pCtx->sMb.pSubMbType[i]) {
WelsFree (pCtx->sMb.pSubMbType[i], "pCtx->sMb.pSubMbType[]");
pCtx->sMb.pSubMbType[i] = NULL;
}
if (pCtx->sMb.pSliceIdc[i]) {
WelsFree (pCtx->sMb.pSliceIdc[i], "pCtx->sMb.pSliceIdc[]");
pCtx->sMb.pSliceIdc[i] = NULL;
}
if (pCtx->sMb.pResidualPredFlag[i]) {
WelsFree (pCtx->sMb.pResidualPredFlag[i], "pCtx->sMb.pResidualPredFlag[]");
pCtx->sMb.pResidualPredFlag[i] = NULL;
}
if (pCtx->sMb.pInterPredictionDoneFlag[i]) {
WelsFree (pCtx->sMb.pInterPredictionDoneFlag[i], "pCtx->sMb.pInterPredictionDoneFlag[]");
pCtx->sMb.pInterPredictionDoneFlag[i] = NULL;
}
if (pCtx->sMb.pMbCorrectlyDecodedFlag[i]) {
WelsFree (pCtx->sMb.pMbCorrectlyDecodedFlag[i], "pCtx->sMb.pMbCorrectlyDecodedFlag[]");
pCtx->sMb.pMbCorrectlyDecodedFlag[i] = NULL;
}
WelsFree (pDq, "pDq");
pDq = NULL;
pCtx->pDqLayersList[i] = NULL;
++ i;
} while (i < LAYER_NUM_EXCHANGEABLE);
pCtx->iPicWidthReq = 0;
pCtx->iPicHeightReq = 0;
pCtx->bInitialDqLayersMem = false;
}
void ResetCurrentAccessUnit (PWelsDecoderContext pCtx) {
PAccessUnit pCurAu = pCtx->pAccessUnitList;
pCurAu->uiEndPos = 0;
pCurAu->bCompletedAuFlag = false;
if (pCurAu->uiActualUnitsNum > 0) {
uint32_t iIdx = 0;
const uint32_t kuiActualNum = pCurAu->uiActualUnitsNum;
// a more simpler method to do nal units list management prefered here
const uint32_t kuiAvailNum = pCurAu->uiAvailUnitsNum;
const uint32_t kuiLeftNum = kuiAvailNum - kuiActualNum;
// Swapping active nal unit nodes of succeeding AU with leading of list
while (iIdx < kuiLeftNum) {
PNalUnit t = pCurAu->pNalUnitsList[kuiActualNum + iIdx];
pCurAu->pNalUnitsList[kuiActualNum + iIdx] = pCurAu->pNalUnitsList[iIdx];
pCurAu->pNalUnitsList[iIdx] = t;
++ iIdx;
}
pCurAu->uiActualUnitsNum = pCurAu->uiAvailUnitsNum = kuiLeftNum;
}
}
/*!
* \brief Force reset current Acess Unit Nal list in case error parsing/decoding in current AU
* \author
* \history 11/16/2009
*/
void ForceResetCurrentAccessUnit (PAccessUnit pAu) {
uint32_t uiSucAuIdx = pAu->uiEndPos + 1;
uint32_t uiCurAuIdx = 0;
// swap the succeeding AU's nal units to the front
while (uiSucAuIdx < pAu->uiAvailUnitsNum) {
PNalUnit t = pAu->pNalUnitsList[uiSucAuIdx];
pAu->pNalUnitsList[uiSucAuIdx] = pAu->pNalUnitsList[uiCurAuIdx];
pAu->pNalUnitsList[uiCurAuIdx] = t;
++ uiSucAuIdx;
++ uiCurAuIdx;
}
// Update avail/actual units num accordingly for next AU parsing
if (pAu->uiAvailUnitsNum > pAu->uiEndPos)
pAu->uiAvailUnitsNum -= (pAu->uiEndPos + 1);
else
pAu->uiAvailUnitsNum = 0;
pAu->uiActualUnitsNum = 0;
pAu->uiEndPos = 0;
pAu->bCompletedAuFlag = false;
}
//clear current corrupted NAL from pNalUnitsList
void ForceClearCurrentNal (PAccessUnit pAu) {
if (pAu->uiAvailUnitsNum > 0)
-- pAu->uiAvailUnitsNum;
}
void CheckAvailNalUnitsListContinuity (PWelsDecoderContext pCtx, int32_t iStartIdx, int32_t iEndIdx) {
PAccessUnit pCurAu = pCtx->pAccessUnitList;
uint8_t uiLastNuDependencyId, uiLastNuLayerDqId;
uint8_t uiCurNuDependencyId, uiCurNuQualityId, uiCurNuLayerDqId, uiCurNuRefLayerDqId;
int32_t iCurNalUnitIdx = 0;
//check the continuity of pNalUnitsList forwards (from pIdxNoInterLayerPred to end_postion)
uiLastNuDependencyId = pCurAu->pNalUnitsList[iStartIdx]->sNalHeaderExt.uiDependencyId;//starting nal unit
uiLastNuLayerDqId = pCurAu->pNalUnitsList[iStartIdx]->sNalHeaderExt.uiLayerDqId;//starting nal unit
iCurNalUnitIdx = iStartIdx + 1;//current nal unit
while (iCurNalUnitIdx <= iEndIdx) {
uiCurNuDependencyId = pCurAu->pNalUnitsList[iCurNalUnitIdx]->sNalHeaderExt.uiDependencyId;
uiCurNuQualityId = pCurAu->pNalUnitsList[iCurNalUnitIdx]->sNalHeaderExt.uiQualityId;
uiCurNuLayerDqId = pCurAu->pNalUnitsList[iCurNalUnitIdx]->sNalHeaderExt.uiLayerDqId;
uiCurNuRefLayerDqId = pCurAu->pNalUnitsList[iCurNalUnitIdx]->sNalData.sVclNal.sSliceHeaderExt.uiRefLayerDqId;
if (uiCurNuDependencyId == uiLastNuDependencyId) {
uiLastNuLayerDqId = uiCurNuLayerDqId;
++ iCurNalUnitIdx;
} else { //uiCurNuDependencyId != uiLastNuDependencyId, new dependency arrive
if (uiCurNuQualityId == 0) {
uiLastNuDependencyId = uiCurNuDependencyId;
if (uiCurNuRefLayerDqId == uiLastNuLayerDqId) {
uiLastNuLayerDqId = uiCurNuLayerDqId;
++ iCurNalUnitIdx;
} else { //cur_nu_layer_id != next_nu_ref_layer_dq_id, the chain is broken at this point
break;
}
} else { //new dependency arrive, but no base quality layer, so we must stop in this point
break;
}
}
}
-- iCurNalUnitIdx;
pCurAu->uiEndPos = iCurNalUnitIdx;
pCtx->uiTargetDqId = pCurAu->pNalUnitsList[iCurNalUnitIdx]->sNalHeaderExt.uiLayerDqId;
}
//main purpose: to support multi-slice and to include all slice which have the same uiDependencyId, uiQualityId and frame_num
//for single slice, pIdxNoInterLayerPred SHOULD NOT be modified
void RefineIdxNoInterLayerPred (PAccessUnit pCurAu, int32_t* pIdxNoInterLayerPred) {
int32_t iLastNalDependId = pCurAu->pNalUnitsList[*pIdxNoInterLayerPred]->sNalHeaderExt.uiDependencyId;
int32_t iLastNalQualityId = pCurAu->pNalUnitsList[*pIdxNoInterLayerPred]->sNalHeaderExt.uiQualityId;
uint8_t uiLastNalTId = pCurAu->pNalUnitsList[*pIdxNoInterLayerPred]->sNalHeaderExt.uiTemporalId;
int32_t iLastNalFrameNum =
pCurAu->pNalUnitsList[*pIdxNoInterLayerPred]->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.iFrameNum;
int32_t iLastNalPoc =
pCurAu->pNalUnitsList[*pIdxNoInterLayerPred]->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.iPicOrderCntLsb;
int32_t iLastNalFirstMb =
pCurAu->pNalUnitsList[*pIdxNoInterLayerPred]->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.iFirstMbInSlice;
int32_t iCurNalDependId, iCurNalQualityId, iCurNalTId, iCurNalFrameNum, iCurNalPoc, iCurNalFirstMb, iCurIdx,
iFinalIdxNoInterLayerPred;
bool bMultiSliceFind = false;
iFinalIdxNoInterLayerPred = 0;
iCurIdx = *pIdxNoInterLayerPred - 1;
while (iCurIdx >= 0) {
if (pCurAu->pNalUnitsList[iCurIdx]->sNalHeaderExt.iNoInterLayerPredFlag) {
iCurNalDependId = pCurAu->pNalUnitsList[iCurIdx]->sNalHeaderExt.uiDependencyId;
iCurNalQualityId = pCurAu->pNalUnitsList[iCurIdx]->sNalHeaderExt.uiQualityId;
iCurNalTId = pCurAu->pNalUnitsList[iCurIdx]->sNalHeaderExt.uiTemporalId;
iCurNalFrameNum = pCurAu->pNalUnitsList[iCurIdx]->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.iFrameNum;
iCurNalPoc = pCurAu->pNalUnitsList[iCurIdx]->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.iPicOrderCntLsb;
iCurNalFirstMb = pCurAu->pNalUnitsList[iCurIdx]->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.iFirstMbInSlice;
if (iCurNalDependId == iLastNalDependId &&
iCurNalQualityId == iLastNalQualityId &&
iCurNalTId == uiLastNalTId &&
iCurNalFrameNum == iLastNalFrameNum &&
iCurNalPoc == iLastNalPoc &&
iCurNalFirstMb != iLastNalFirstMb) {
bMultiSliceFind = true;
iFinalIdxNoInterLayerPred = iCurIdx;
--iCurIdx;
continue;
} else {
break;
}
}
--iCurIdx;
}
if (bMultiSliceFind && *pIdxNoInterLayerPred != iFinalIdxNoInterLayerPred) {
*pIdxNoInterLayerPred = iFinalIdxNoInterLayerPred;
}
}
bool CheckPocOfCurValidNalUnits (PAccessUnit pCurAu, int32_t pIdxNoInterLayerPred) {
int32_t iEndIdx = pCurAu->uiEndPos;
int32_t iCurAuPoc =
pCurAu->pNalUnitsList[pIdxNoInterLayerPred]->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.iPicOrderCntLsb;
int32_t iTmpPoc, i;
for (i = pIdxNoInterLayerPred + 1; i < iEndIdx; i++) {
iTmpPoc = pCurAu->pNalUnitsList[i]->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.iPicOrderCntLsb;
if (iTmpPoc != iCurAuPoc) {
return false;
}
}
return true;
}
bool CheckIntegrityNalUnitsList (PWelsDecoderContext pCtx) {
PAccessUnit pCurAu = pCtx->pAccessUnitList;
const int32_t kiEndPos = pCurAu->uiEndPos;
int32_t iIdxNoInterLayerPred = 0;
if (!pCurAu->bCompletedAuFlag)
return false;
if (pCtx->bNewSeqBegin) {
pCurAu->uiStartPos = 0;
//step1: search the pNalUnit whose iNoInterLayerPredFlag equal to 1 backwards (from uiEndPos to 0)
iIdxNoInterLayerPred = kiEndPos;
while (iIdxNoInterLayerPred >= 0) {
if (pCurAu->pNalUnitsList[iIdxNoInterLayerPred]->sNalHeaderExt.iNoInterLayerPredFlag) {
break;
}
--iIdxNoInterLayerPred;
}
if (iIdxNoInterLayerPred < 0) {
//can not find the Nal Unit whose no_inter_pred_falg equal to 1, MUST STOP decode
return false;
}
//step2: support multi-slice, to include all base layer slice
RefineIdxNoInterLayerPred (pCurAu, &iIdxNoInterLayerPred);
pCurAu->uiStartPos = iIdxNoInterLayerPred;
CheckAvailNalUnitsListContinuity (pCtx, iIdxNoInterLayerPred, kiEndPos);
if (!CheckPocOfCurValidNalUnits (pCurAu, iIdxNoInterLayerPred)) {
return false;
}
pCtx->iCurSeqIntervalTargetDependId = pCurAu->pNalUnitsList[pCurAu->uiEndPos]->sNalHeaderExt.uiDependencyId;
pCtx->iCurSeqIntervalMaxPicWidth =
pCurAu->pNalUnitsList[pCurAu->uiEndPos]->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.iMbWidth << 4;
pCtx->iCurSeqIntervalMaxPicHeight =
pCurAu->pNalUnitsList[pCurAu->uiEndPos]->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.iMbHeight << 4;
} else { //P_SLICE
//step 1: search uiDependencyId equal to pCtx->cur_seq_interval_target_dependency_id
bool bGetDependId = false;
int32_t iIdxDependId = 0;
iIdxDependId = kiEndPos;
while (iIdxDependId >= 0) {
if (pCtx->iCurSeqIntervalTargetDependId == pCurAu->pNalUnitsList[iIdxDependId]->sNalHeaderExt.uiDependencyId) {
bGetDependId = true;
break;
} else {
--iIdxDependId;
}
}
//step 2: switch according to whether or not find the index of pNalUnit whose uiDependencyId equal to iCurSeqIntervalTargetDependId
if (bGetDependId) { //get the index of pNalUnit whose uiDependencyId equal to iCurSeqIntervalTargetDependId
bool bGetNoInterPredFront = false;
//step 2a: search iNoInterLayerPredFlag [0....iIdxDependId]
iIdxNoInterLayerPred = iIdxDependId;
while (iIdxNoInterLayerPred >= 0) {
if (pCurAu->pNalUnitsList[iIdxNoInterLayerPred]->sNalHeaderExt.iNoInterLayerPredFlag) {
bGetNoInterPredFront = true;
break;
}
--iIdxNoInterLayerPred;
}
//step 2b: switch, whether or not find the NAL unit whose no_inter_pred_flag equal to 1 among [0....iIdxDependId]
if (bGetNoInterPredFront) { //YES
RefineIdxNoInterLayerPred (pCurAu, &iIdxNoInterLayerPred);
pCurAu->uiStartPos = iIdxNoInterLayerPred;
CheckAvailNalUnitsListContinuity (pCtx, iIdxNoInterLayerPred, iIdxDependId);
if (!CheckPocOfCurValidNalUnits (pCurAu, iIdxNoInterLayerPred)) {
return false;
}
} else { //NO, should find the NAL unit whose no_inter_pred_flag equal to 1 among [iIdxDependId....uiEndPos]
iIdxNoInterLayerPred = iIdxDependId;
while (iIdxNoInterLayerPred <= kiEndPos) {
if (pCurAu->pNalUnitsList[iIdxNoInterLayerPred]->sNalHeaderExt.iNoInterLayerPredFlag) {
break;
}
++iIdxNoInterLayerPred;
}
if (iIdxNoInterLayerPred > kiEndPos) {
return false; //cann't find the index of pNalUnit whose no_inter_pred_flag = 1
}
RefineIdxNoInterLayerPred (pCurAu, &iIdxNoInterLayerPred);
pCurAu->uiStartPos = iIdxNoInterLayerPred;
CheckAvailNalUnitsListContinuity (pCtx, iIdxNoInterLayerPred, kiEndPos);
if (!CheckPocOfCurValidNalUnits (pCurAu, iIdxNoInterLayerPred)) {
return false;
}
}
} else { //without the index of pNalUnit, should process this AU as common case
iIdxNoInterLayerPred = kiEndPos;
while (iIdxNoInterLayerPred >= 0) {
if (pCurAu->pNalUnitsList[iIdxNoInterLayerPred]->sNalHeaderExt.iNoInterLayerPredFlag) {
break;
}
--iIdxNoInterLayerPred;
}
if (iIdxNoInterLayerPred < 0) {
return false; //cann't find the index of pNalUnit whose iNoInterLayerPredFlag = 1
}
RefineIdxNoInterLayerPred (pCurAu, &iIdxNoInterLayerPred);
pCurAu->uiStartPos = iIdxNoInterLayerPred;
CheckAvailNalUnitsListContinuity (pCtx, iIdxNoInterLayerPred, kiEndPos);
if (!CheckPocOfCurValidNalUnits (pCurAu, iIdxNoInterLayerPred)) {
return false;
}
}
}
return true;
}
void CheckOnlyOneLayerInAu (PWelsDecoderContext pCtx) {
PAccessUnit pCurAu = pCtx->pAccessUnitList;
int32_t iEndIdx = pCurAu->uiEndPos;
int32_t iCurIdx = pCurAu->uiStartPos;
uint8_t uiDId = pCurAu->pNalUnitsList[iCurIdx]->sNalHeaderExt.uiDependencyId;
uint8_t uiQId = pCurAu->pNalUnitsList[iCurIdx]->sNalHeaderExt.uiQualityId;
uint8_t uiTId = pCurAu->pNalUnitsList[iCurIdx]->sNalHeaderExt.uiTemporalId;
uint8_t uiCurDId, uiCurQId, uiCurTId;
pCtx->bOnlyOneLayerInCurAuFlag = true;
if (iEndIdx == iCurIdx) { //only one NAL in pNalUnitsList
return;
}
++iCurIdx;
while (iCurIdx <= iEndIdx) {
uiCurDId = pCurAu->pNalUnitsList[iCurIdx]->sNalHeaderExt.uiDependencyId;
uiCurQId = pCurAu->pNalUnitsList[iCurIdx]->sNalHeaderExt.uiQualityId;
uiCurTId = pCurAu->pNalUnitsList[iCurIdx]->sNalHeaderExt.uiTemporalId;
if (uiDId != uiCurDId || uiQId != uiCurQId || uiTId != uiCurTId) {
pCtx->bOnlyOneLayerInCurAuFlag = false;
return;
}
++iCurIdx;
}
}
int32_t WelsDecodeAccessUnitStart (PWelsDecoderContext pCtx) {
// Roll back NAL units not being belong to current access unit list for proceeded access unit
int32_t iRet = UpdateAccessUnit (pCtx);
if (iRet != ERR_NONE)
return iRet;
pCtx->pAccessUnitList->uiStartPos = 0;
if (!pCtx->bAvcBasedFlag && !CheckIntegrityNalUnitsList (pCtx)) {
pCtx->iErrorCode |= dsBitstreamError;
return dsBitstreamError;
}
//check current AU has only one layer or not
//If YES, can use deblocking based on AVC
if (!pCtx->bAvcBasedFlag) {
CheckOnlyOneLayerInAu (pCtx);
}
return ERR_NONE;
}
void WelsDecodeAccessUnitEnd (PWelsDecoderContext pCtx) {
//save previous header info
PAccessUnit pCurAu = pCtx->pAccessUnitList;
PNalUnit pCurNal = pCurAu->pNalUnitsList[pCurAu->uiEndPos];
memcpy (&pCtx->sLastNalHdrExt, &pCurNal->sNalHeaderExt, sizeof (SNalUnitHeaderExt));
memcpy (&pCtx->sLastSliceHeader,
&pCurNal->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader, sizeof (SSliceHeader));
// uninitialize context of current access unit and rbsp buffer clean
ResetCurrentAccessUnit (pCtx);
}
/* CheckNewSeqBeginAndUpdateActiveLayerSps
* return:
* true - the AU to be construct is the start of new sequence; false - not
*/
static bool CheckNewSeqBeginAndUpdateActiveLayerSps (PWelsDecoderContext pCtx) {
bool bNewSeq = false;
PAccessUnit pCurAu = pCtx->pAccessUnitList;
PSps pTmpLayerSps[MAX_LAYER_NUM];
for (int i = 0; i < MAX_LAYER_NUM; i++) {
pTmpLayerSps[i] = NULL;
}
// track the layer sps for the current au
for (unsigned int i = pCurAu->uiStartPos; i <= pCurAu->uiEndPos; i++) {
uint32_t uiDid = pCurAu->pNalUnitsList[i]->sNalHeaderExt.uiDependencyId;
pTmpLayerSps[uiDid] = pCurAu->pNalUnitsList[i]->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.pSps;
if ((pCurAu->pNalUnitsList[i]->sNalHeaderExt.sNalUnitHeader.eNalUnitType == NAL_UNIT_CODED_SLICE_IDR)
|| (pCurAu->pNalUnitsList[i]->sNalHeaderExt.bIdrFlag))
bNewSeq = true;
}
int iMaxActiveLayer = 0, iMaxCurrentLayer = 0;
for (int i = MAX_LAYER_NUM - 1; i >= 0; i--) {
if (pCtx->pActiveLayerSps[i] != NULL) {
iMaxActiveLayer = i;
break;
}
}
for (int i = MAX_LAYER_NUM - 1; i >= 0; i--) {
if (pTmpLayerSps[i] != NULL) {
iMaxCurrentLayer = i;
break;
}
}
if ((iMaxCurrentLayer != iMaxActiveLayer)
|| (pTmpLayerSps[iMaxCurrentLayer] != pCtx->pActiveLayerSps[iMaxActiveLayer])) {
bNewSeq = true;
}
// fill active sps if the current sps is not null while active layer is null
if (!bNewSeq) {
for (int i = 0; i < MAX_LAYER_NUM; i++) {
if (pCtx->pActiveLayerSps[i] == NULL && pTmpLayerSps[i] != NULL) {
pCtx->pActiveLayerSps[i] = pTmpLayerSps[i];
}
}
} else {
// UpdateActiveLayerSps if new sequence start
memcpy (&pCtx->pActiveLayerSps[0], &pTmpLayerSps[0], MAX_LAYER_NUM * sizeof (PSps));
}
return bNewSeq;
}
static void WriteBackActiveParameters (PWelsDecoderContext pCtx) {
if (pCtx->iOverwriteFlags & OVERWRITE_PPS) {
memcpy (&pCtx->sPpsBuffer[pCtx->sPpsBuffer[MAX_PPS_COUNT].iPpsId], &pCtx->sPpsBuffer[MAX_PPS_COUNT], sizeof (SPps));
}
if (pCtx->iOverwriteFlags & OVERWRITE_SPS) {
memcpy (&pCtx->sSpsBuffer[pCtx->sSpsBuffer[MAX_SPS_COUNT].iSpsId], &pCtx->sSpsBuffer[MAX_SPS_COUNT], sizeof (SSps));
pCtx->bNewSeqBegin = true;
}
if (pCtx->iOverwriteFlags & OVERWRITE_SUBSETSPS) {
memcpy (&pCtx->sSubsetSpsBuffer[pCtx->sSubsetSpsBuffer[MAX_SPS_COUNT].sSps.iSpsId],
&pCtx->sSubsetSpsBuffer[MAX_SPS_COUNT], sizeof (SSubsetSps));
pCtx->bNewSeqBegin = true;
}
pCtx->iOverwriteFlags = OVERWRITE_NONE;
}
/*
* ConstructAccessUnit
* construct an access unit for given input bitstream, maybe partial NAL Unit, one or more Units are involved to
* joint a collective access unit.
* parameter\
* buf: bitstream data buffer
* bit_len: size in bit length of data
* buf_len: size in byte length of data
* coded_au: mark an Access Unit decoding finished
* return:
* 0 - success; otherwise returned error_no defined in error_no.h
*/
int32_t ConstructAccessUnit (PWelsDecoderContext pCtx, uint8_t** ppDst, SBufferInfo* pDstInfo) {
int32_t iErr;
PAccessUnit pCurAu = pCtx->pAccessUnitList;
pCtx->bAuReadyFlag = false;
pCtx->bLastHasMmco5 = false;
bool bTmpNewSeqBegin = CheckNewSeqBeginAndUpdateActiveLayerSps (pCtx);
pCtx->bNewSeqBegin = pCtx->bNewSeqBegin || bTmpNewSeqBegin;
iErr = WelsDecodeAccessUnitStart (pCtx);
GetVclNalTemporalId (pCtx);
if (ERR_NONE != iErr) {
ForceResetCurrentAccessUnit (pCtx->pAccessUnitList);
pDstInfo->iBufferStatus = 0;
return iErr;
}
pCtx->pSps = pCurAu->pNalUnitsList[pCurAu->uiStartPos]->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.pSps;
pCtx->pPps = pCurAu->pNalUnitsList[pCurAu->uiStartPos]->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader.pPps;
//try to allocate or relocate DPB memory only when new sequence is coming.
if (pCtx->bNewSeqBegin) {
WelsResetRefPic (pCtx); //clear ref pPic when IDR NAL
iErr = SyncPictureResolutionExt (pCtx, pCtx->pSps->iMbWidth, pCtx->pSps->iMbHeight);
if (ERR_NONE != iErr) {
WelsLog (& (pCtx->sLogCtx), WELS_LOG_WARNING, "sync picture resolution ext failed, the error is %d", iErr);
return iErr;
}
}
iErr = DecodeCurrentAccessUnit (pCtx, ppDst, pDstInfo);
WelsDecodeAccessUnitEnd (pCtx);
pCtx->bNewSeqBegin = false;
WriteBackActiveParameters (pCtx);
pCtx->bNewSeqBegin = pCtx->bNewSeqBegin || pCtx->bNextNewSeqBegin;
pCtx->bNextNewSeqBegin = false; // reset it
if (pCtx->bNewSeqBegin)
ResetActiveSPSForEachLayer (pCtx);
if (ERR_NONE != iErr) {
WelsLog (& (pCtx->sLogCtx), WELS_LOG_INFO, "returned error from decoding:[0x%x]", iErr);
return iErr;
}
return 0;
}
static inline void InitDqLayerInfo (PDqLayer pDqLayer, PLayerInfo pLayerInfo, PNalUnit pNalUnit, PPicture pPicDec) {
PNalUnitHeaderExt pNalHdrExt = &pNalUnit->sNalHeaderExt;
PSliceHeaderExt pShExt = &pNalUnit->sNalData.sVclNal.sSliceHeaderExt;
PSliceHeader pSh = &pShExt->sSliceHeader;
const uint8_t kuiQualityId = pNalHdrExt->uiQualityId;
memcpy (&pDqLayer->sLayerInfo, pLayerInfo, sizeof (SLayerInfo)); //confirmed_safe_unsafe_usage
pDqLayer->pDec = pPicDec;
pDqLayer->iMbWidth = pSh->iMbWidth; // MB width of this picture
pDqLayer->iMbHeight = pSh->iMbHeight;// MB height of this picture
pDqLayer->iSliceIdcBackup = (pSh->iFirstMbInSlice << 7) | (pNalHdrExt->uiDependencyId << 4) | (pNalHdrExt->uiQualityId);
/* Common syntax elements across all slices of a DQLayer */
pDqLayer->uiPpsId = pLayerInfo->pPps->iPpsId;
pDqLayer->uiDisableInterLayerDeblockingFilterIdc = pShExt->uiDisableInterLayerDeblockingFilterIdc;
pDqLayer->iInterLayerSliceAlphaC0Offset = pShExt->iInterLayerSliceAlphaC0Offset;
pDqLayer->iInterLayerSliceBetaOffset = pShExt->iInterLayerSliceBetaOffset;
pDqLayer->iSliceGroupChangeCycle = pSh->iSliceGroupChangeCycle;
pDqLayer->bStoreRefBasePicFlag = pShExt->bStoreRefBasePicFlag;
pDqLayer->bTCoeffLevelPredFlag = pShExt->bTCoeffLevelPredFlag;
pDqLayer->bConstrainedIntraResamplingFlag = pShExt->bConstrainedIntraResamplingFlag;
pDqLayer->uiRefLayerDqId = pShExt->uiRefLayerDqId;
pDqLayer->uiRefLayerChromaPhaseXPlus1Flag = pShExt->uiRefLayerChromaPhaseXPlus1Flag;
pDqLayer->uiRefLayerChromaPhaseYPlus1 = pShExt->uiRefLayerChromaPhaseYPlus1;
//memcpy(&pDqLayer->sScaledRefLayer, &pShExt->sScaledRefLayer, sizeof(SPosOffset));//confirmed_safe_unsafe_usage
if (kuiQualityId == BASE_QUALITY_ID) {
pDqLayer->pRefPicListReordering = &pSh->pRefPicListReordering;
pDqLayer->pRefPicMarking = &pSh->sRefMarking;
pDqLayer->pRefPicBaseMarking = &pShExt->sRefBasePicMarking;
}
pDqLayer->uiLayerDqId = pNalHdrExt->uiLayerDqId; // dq_id of current layer
pDqLayer->bUseRefBasePicFlag = pNalHdrExt->bUseRefBasePicFlag;
}
void WelsDqLayerDecodeStart (PWelsDecoderContext pCtx, PNalUnit pCurNal, PSps pSps, PPps pPps) {
PSliceHeader pSh = &pCurNal->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader;
pCtx->eSliceType = pSh->eSliceType;
pCtx->pSliceHeader = pSh;
pCtx->iFrameNum = pSh->iFrameNum;
}
int32_t InitRefPicList (PWelsDecoderContext pCtx, const uint8_t kuiNRi, int32_t iPoc) {
int32_t iRet = ERR_NONE;
iRet = WelsInitRefList (pCtx, iPoc);
if ((pCtx->eSliceType != I_SLICE && pCtx->eSliceType != SI_SLICE)) {
iRet = WelsReorderRefList (pCtx);
}
return iRet;
}
void InitCurDqLayerData (PWelsDecoderContext pCtx, PDqLayer pCurDq) {
if (NULL != pCtx && NULL != pCurDq) {
pCurDq->pMbType = pCtx->sMb.pMbType[0];
pCurDq->pSliceIdc = pCtx->sMb.pSliceIdc[0];
pCurDq->pMv[0] = pCtx->sMb.pMv[0][0];
pCurDq->pRefIndex[0] = pCtx->sMb.pRefIndex[0][0];
pCurDq->pLumaQp = pCtx->sMb.pLumaQp[0];
pCurDq->pChromaQp = pCtx->sMb.pChromaQp[0];
pCurDq->pNzc = pCtx->sMb.pNzc[0];
pCurDq->pNzcRs = pCtx->sMb.pNzcRs[0];
pCurDq->pScaledTCoeff = pCtx->sMb.pScaledTCoeff[0];
pCurDq->pIntraPredMode = pCtx->sMb.pIntraPredMode[0];
pCurDq->pIntra4x4FinalMode = pCtx->sMb.pIntra4x4FinalMode[0];
pCurDq->pChromaPredMode = pCtx->sMb.pChromaPredMode[0];
pCurDq->pCbp = pCtx->sMb.pCbp[0];
pCurDq->pSubMbType = pCtx->sMb.pSubMbType[0];
pCurDq->pInterPredictionDoneFlag = pCtx->sMb.pInterPredictionDoneFlag[0];
pCurDq->pResidualPredFlag = pCtx->sMb.pResidualPredFlag[0];
pCurDq->pMbCorrectlyDecodedFlag = pCtx->sMb.pMbCorrectlyDecodedFlag[0];
}
}
// added to reset state of parameter sets to waiting successive incoming IDR, 6/4/2010
// It will be called in case packets lost/ broken and decoded failed at temporal level 0
void ResetParameterSetsState (PWelsDecoderContext pCtx) {
pCtx->bSpsExistAheadFlag = false;
pCtx->bSubspsExistAheadFlag = false;
pCtx->bPpsExistAheadFlag = false;
}
/*
* DecodeCurrentAccessUnit
* Decode current access unit when current AU is completed.
*/
int32_t DecodeCurrentAccessUnit (PWelsDecoderContext pCtx, uint8_t** ppDst, SBufferInfo* pDstInfo) {
int32_t iRefCount[LIST_A];
PNalUnit pNalCur = NULL;
PAccessUnit pCurAu = pCtx->pAccessUnitList;
int32_t iIdx = pCurAu->uiStartPos;
int32_t iEndIdx = pCurAu->uiEndPos;
int32_t iPpsId = 0;
int32_t iRet = ERR_NONE;
const uint8_t kuiTargetLayerDqId = GetTargetDqId (pCtx->uiTargetDqId, pCtx->pParam);
const uint8_t kuiDependencyIdMax = (kuiTargetLayerDqId & 0x7F) >> 4;
int16_t iLastIdD = -1, iLastIdQ = -1;
int16_t iCurrIdD = 0, iCurrIdQ = 0;
uint8_t uiNalRefIdc = 0;
bool bFreshSliceAvailable =
true; // Another fresh slice comingup for given dq layer, for multiple slices in case of header parts of slices sometimes loss over error-prone channels, 8/14/2008
//update pCurDqLayer at the starting of AU decoding
if (pCtx->bInitialDqLayersMem) {
pCtx->pCurDqLayer = pCtx->pDqLayersList[0];
}
InitCurDqLayerData (pCtx, pCtx->pCurDqLayer);
pNalCur = pCurAu->pNalUnitsList[iIdx];
while (iIdx <= iEndIdx) {
PDqLayer dq_cur = pCtx->pCurDqLayer;
SLayerInfo pLayerInfo;
PSliceHeaderExt pShExt = NULL;
PSliceHeader pSh = NULL;
if (pCtx->pDec == NULL) {
pCtx->pDec = PrefetchPic (pCtx->pPicBuff[0]);
if (NULL == pCtx->pDec) {
WelsLog (& (pCtx->sLogCtx), WELS_LOG_ERROR,
"DecodeCurrentAccessUnit()::::::PrefetchPic ERROR, pSps->iNumRefFrames:%d.",
pCtx->pSps->iNumRefFrames);
pCtx->iErrorCode |= dsOutOfMemory;
return ERR_INFO_REF_COUNT_OVERFLOW;
}
}
if (pCtx->iTotalNumMbRec == 0) { //Picture start to decode
for (int32_t i = 0; i < LAYER_NUM_EXCHANGEABLE; ++ i)
memset (pCtx->sMb.pSliceIdc[i], 0xff, (pCtx->sMb.iMbWidth * pCtx->sMb.iMbHeight * sizeof (int32_t)));
memset (pCtx->pCurDqLayer->pMbCorrectlyDecodedFlag, 0, pCtx->pSps->iMbWidth * pCtx->pSps->iMbHeight);
}
GetI4LumaIChromaAddrTable (pCtx->iDecBlockOffsetArray, pCtx->pDec->iLinesize[0], pCtx->pDec->iLinesize[1]);
if (pNalCur->sNalHeaderExt.uiLayerDqId > kuiTargetLayerDqId) { // confirmed pNalCur will never be NULL
break; // Per formance it need not to decode the remaining bits any more due to given uiLayerDqId required, 9/2/2009
}
memset (&pLayerInfo, 0, sizeof (SLayerInfo));
/*
* Loop decoding for slices (even FMO and/ multiple slices) within a dq layer
*/
while (iIdx <= iEndIdx) {
bool bReconstructSlice;
iCurrIdQ = pNalCur->sNalHeaderExt.uiQualityId;
iCurrIdD = pNalCur->sNalHeaderExt.uiDependencyId;
pSh = &pNalCur->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader;
pShExt = &pNalCur->sNalData.sVclNal.sSliceHeaderExt;
bReconstructSlice = CheckSliceNeedReconstruct (pNalCur->sNalHeaderExt.uiLayerDqId, kuiTargetLayerDqId);
memcpy (&pLayerInfo.sNalHeaderExt, &pNalCur->sNalHeaderExt, sizeof (SNalUnitHeaderExt)); //confirmed_safe_unsafe_usage
pCtx->pDec->iFrameNum = pSh->iFrameNum;
memcpy (&pLayerInfo.sSliceInLayer.sSliceHeaderExt, pShExt, sizeof (SSliceHeaderExt)); //confirmed_safe_unsafe_usage
pLayerInfo.sSliceInLayer.bSliceHeaderExtFlag = pNalCur->sNalData.sVclNal.bSliceHeaderExtFlag;
pLayerInfo.sSliceInLayer.eSliceType = pSh->eSliceType;
pLayerInfo.sSliceInLayer.iLastMbQp = pSh->iSliceQp;
dq_cur->pBitStringAux = &pNalCur->sNalData.sVclNal.sSliceBitsRead;
uiNalRefIdc = pNalCur->sNalHeaderExt.sNalUnitHeader.uiNalRefIdc;
iPpsId = pSh->iPpsId;
pLayerInfo.pPps = pSh->pPps;
pLayerInfo.pSps = pSh->pSps;
pLayerInfo.pSubsetSps = pShExt->pSubsetSps;
pCtx->pFmo = &pCtx->sFmoList[iPpsId];
if (!FmoParamUpdate (pCtx->pFmo, pLayerInfo.pSps, pLayerInfo.pPps, &pCtx->iActiveFmoNum)) {
pCtx->iErrorCode |= dsBitstreamError;
WelsLog (& (pCtx->sLogCtx), WELS_LOG_WARNING, "DecodeCurrentAccessUnit(), FmoParamUpdate failed, eSliceType: %d.",
pSh->eSliceType);
return GENERATE_ERROR_NO (ERR_LEVEL_SLICE_HEADER, ERR_INFO_FMO_INIT_FAIL);
}
bFreshSliceAvailable = (iCurrIdD != iLastIdD
|| iCurrIdQ != iLastIdQ); // do not need condition of (first_mb == 0) due multiple slices might be disorder
WelsDqLayerDecodeStart (pCtx, pNalCur, pLayerInfo.pSps, pLayerInfo.pPps);
if (iCurrIdQ == BASE_QUALITY_ID) {
ST64 (iRefCount, LD64 (pLayerInfo.sSliceInLayer.sSliceHeaderExt.sSliceHeader.uiRefCount));
}
if ((iLastIdD < 0) || //case 1: first layer
(iLastIdD == iCurrIdD)) { //case 2: same uiDId
InitDqLayerInfo (dq_cur, &pLayerInfo, pNalCur, pCtx->pDec);
if (!dq_cur->sLayerInfo.pSps->bGapsInFrameNumValueAllowedFlag) {
const bool kbIdrFlag = dq_cur->sLayerInfo.sNalHeaderExt.bIdrFlag
|| (dq_cur->sLayerInfo.sNalHeaderExt.sNalUnitHeader.eNalUnitType == NAL_UNIT_CODED_SLICE_IDR);
// Subclause 8.2.5.2 Decoding process for gaps in frame_num
if (!kbIdrFlag &&
pSh->iFrameNum != pCtx->iPrevFrameNum &&
pSh->iFrameNum != ((pCtx->iPrevFrameNum + 1) & ((1 << dq_cur->sLayerInfo.pSps->uiLog2MaxFrameNum) - 1))) {
WelsLog (& (pCtx->sLogCtx), WELS_LOG_WARNING,
"referencing pictures lost due frame gaps exist, prev_frame_num: %d, curr_frame_num: %d", pCtx->iPrevFrameNum,
pSh->iFrameNum);
pCtx->iErrorCode |= dsRefLost;
if (pCtx->eErrorConMethod == ERROR_CON_DISABLE) {
#ifdef LONG_TERM_REF
pCtx->bParamSetsLostFlag = true;
#else
pCtx->bReferenceLostAtT0Flag = true;
#endif
ResetParameterSetsState (pCtx);
return ERR_INFO_REFERENCE_PIC_LOST;
}
}
}
if (iCurrIdD == kuiDependencyIdMax && iCurrIdQ == BASE_QUALITY_ID) {
iRet = InitRefPicList (pCtx, uiNalRefIdc, pSh->iPicOrderCntLsb);
if (iRet) {
HandleReferenceLost (pCtx, pNalCur);
WelsLog (& (pCtx->sLogCtx), WELS_LOG_WARNING,
"reference picture introduced by this frame is lost during transmission! uiTId: %d",
pNalCur->sNalHeaderExt.uiTemporalId);
if (pCtx->eErrorConMethod == ERROR_CON_DISABLE) {
return iRet;
}
}
}
iRet = WelsDecodeSlice (pCtx, bFreshSliceAvailable, pNalCur);
//Output good store_base reconstruction when enhancement quality layer occurred error for MGS key picture case
if (iRet != ERR_NONE) {
WelsLog (& (pCtx->sLogCtx), WELS_LOG_WARNING,
"DecodeCurrentAccessUnit() failed (%d) in frame: %d uiDId: %d uiQId: %d",
iRet, pSh->iFrameNum, iCurrIdD, iCurrIdQ);
HandleReferenceLostL0 (pCtx, pNalCur);
if (pCtx->eErrorConMethod == ERROR_CON_DISABLE) {
return iRet;
}
}
if (bReconstructSlice) {
if (WelsDecodeConstructSlice (pCtx, pNalCur)) {
return -1;
}
}
}
#if defined (_DEBUG) && !defined (CODEC_FOR_TESTBED)
fprintf (stderr, "cur_frame : %d iCurrIdD : %d\n ",
dq_cur->sLayerInfo.sSliceInLayer.sSliceHeaderExt.sSliceHeader.iFrameNum, iCurrIdD);
#endif//#if !CODEC_FOR_TESTBED
iLastIdD = iCurrIdD;
iLastIdQ = iCurrIdQ;
//pNalUnitsList overflow.
++ iIdx;
if (iIdx <= iEndIdx) {
pNalCur = pCurAu->pNalUnitsList[iIdx];
} else {
pNalCur = NULL;
}
if (pNalCur == NULL ||
iLastIdD != pNalCur->sNalHeaderExt.uiDependencyId ||
iLastIdQ != pNalCur->sNalHeaderExt.uiQualityId)
break;
}
// A dq layer decoded here
#if defined (_DEBUG) && !defined (CODEC_FOR_TESTBED)
#undef fprintf
fprintf (stderr, "POC: #%d, FRAME: #%d, D: %d, Q: %d, T: %d, P: %d, %d\n",
pSh->iPicOrderCntLsb, pSh->iFrameNum, iCurrIdD, iCurrIdQ, dq_cur->sLayerInfo.sNalHeaderExt.uiTemporalId,
dq_cur->sLayerInfo.sNalHeaderExt.uiPriorityId, dq_cur->sLayerInfo.sSliceInLayer.sSliceHeaderExt.sSliceHeader.iSliceQp);
#endif//#if !CODEC_FOR_TESTBED
if (dq_cur->uiLayerDqId == kuiTargetLayerDqId) {
if (!pCtx->bInstantDecFlag) {
//Do error concealment here
if (NeedErrorCon (pCtx)) {
ImplementErrorCon (pCtx);
pCtx->iTotalNumMbRec = pCtx->pSps->iMbWidth * pCtx->pSps->iMbHeight;
pCtx->pDec->iSpsId = pCtx->pSps->iSpsId;
pCtx->pDec->iPpsId = pCtx->pPps->iPpsId;
}
}
if (DecodeFrameConstruction (pCtx, ppDst, pDstInfo)) {
return ERR_NONE;
}
if (uiNalRefIdc > 0) {
pCtx->pPreviousDecodedPictureInDpb = pCtx->pDec; //store latest decoded picture for EC
iRet = WelsMarkAsRef (pCtx);
if (iRet != ERR_NONE) {
if (pCtx->eErrorConMethod == ERROR_CON_DISABLE) {
pCtx->pDec = NULL;
return iRet;
}
}
ExpandReferencingPicture (pCtx->pDec->pData, pCtx->pDec->iWidthInPixel, pCtx->pDec->iHeightInPixel,
pCtx->pDec->iLinesize,
pCtx->sExpandPicFunc.pfExpandLumaPicture, pCtx->sExpandPicFunc.pfExpandChromaPicture);
pCtx->pDec = NULL;
}
}
// need update frame_num due current frame is well decoded
pCtx->iPrevFrameNum = pSh->iFrameNum;
if (pCtx->bLastHasMmco5)
pCtx->iPrevFrameNum = 0;
}
return ERR_NONE;
}
bool CheckAndFinishLastPic (PWelsDecoderContext pCtx, uint8_t** ppDst, SBufferInfo* pDstInfo) {
PAccessUnit pAu = pCtx->pAccessUnitList;
PNalUnit pCurNal = pAu->pNalUnitsList[pAu->uiEndPos];
if ((pCtx->iTotalNumMbRec != 0)
&& (CheckAccessUnitBoundaryExt (&pCtx->sLastNalHdrExt, &pCurNal->sNalHeaderExt, &pCtx->sLastSliceHeader,
&pCurNal->sNalData.sVclNal.sSliceHeaderExt.sSliceHeader))) {
//Do Error Concealment here
if (NeedErrorCon (pCtx)) { //should always be true!
if (pCtx->eErrorConMethod != ERROR_CON_DISABLE) {
ImplementErrorCon (pCtx);
pCtx->iTotalNumMbRec = pCtx->pSps->iMbWidth * pCtx->pSps->iMbHeight;
pCtx->pDec->iSpsId = pCtx->pSps->iSpsId;
pCtx->pDec->iPpsId = pCtx->pPps->iPpsId;
DecodeFrameConstruction (pCtx, ppDst, pDstInfo);
if (pCtx->sLastNalHdrExt.sNalUnitHeader.uiNalRefIdc > 0) {
pCtx->pPreviousDecodedPictureInDpb = pCtx->pDec; //save ECed pic for future use
MarkECFrameAsRef (pCtx);
}
} else {
DecodeFrameConstruction (pCtx, ppDst, pDstInfo);
}
pCtx->iPrevFrameNum = pCtx->sLastSliceHeader.iFrameNum; //save frame_num
if (pCtx->bLastHasMmco5)
pCtx->iPrevFrameNum = 0;
}
}
return ERR_NONE;
}
} // namespace WelsDec