ref: 634babeda4a9397bbb73c51b237e48a53ea00b03
dir: /src/h264bsd_slice_header.h/
/*
* Copyright (C) 2009 The Android Open Source Project
* Modified for use by h264bsd standalone library
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*------------------------------------------------------------------------------
Table of contents
1. Include headers
2. Module defines
3. Data types
4. Function prototypes
------------------------------------------------------------------------------*/
#ifndef H264SWDEC_SLICE_HEADER_H
#define H264SWDEC_SLICE_HEADER_H
/*------------------------------------------------------------------------------
1. Include headers
------------------------------------------------------------------------------*/
#include "basetype.h"
#include "h264bsd_stream.h"
#include "h264bsd_cfg.h"
#include "h264bsd_seq_param_set.h"
#include "h264bsd_pic_param_set.h"
#include "h264bsd_nal_unit.h"
/*------------------------------------------------------------------------------
2. Module defines
------------------------------------------------------------------------------*/
enum {
P_SLICE = 0,
I_SLICE = 2
};
enum {NO_LONG_TERM_FRAME_INDICES = 0xFFFF};
/* macro to determine if slice is an inter slice, sliceTypes 0 and 5 */
#define IS_P_SLICE(sliceType) (((sliceType) == P_SLICE) || \
((sliceType) == P_SLICE + 5))
/* macro to determine if slice is an intra slice, sliceTypes 2 and 7 */
#define IS_I_SLICE(sliceType) (((sliceType) == I_SLICE) || \
((sliceType) == I_SLICE + 5))
/*------------------------------------------------------------------------------
3. Data types
------------------------------------------------------------------------------*/
/* structure to store data of one reference picture list reordering operation */
typedef struct
{
u32 reorderingOfPicNumsIdc;
u32 absDiffPicNum;
u32 longTermPicNum;
} refPicListReorderingOperation_t;
/* structure to store reference picture list reordering operations */
typedef struct
{
u32 refPicListReorderingFlagL0;
refPicListReorderingOperation_t command[MAX_NUM_REF_PICS+1];
} refPicListReordering_t;
/* structure to store data of one DPB memory management control operation */
typedef struct
{
u32 memoryManagementControlOperation;
u32 differenceOfPicNums;
u32 longTermPicNum;
u32 longTermFrameIdx;
u32 maxLongTermFrameIdx;
} memoryManagementOperation_t;
/* worst case scenario: all MAX_NUM_REF_PICS pictures in the buffer are
* short term pictures, each one of them is first marked as long term
* reference picture which is then marked as unused for reference.
* Additionally, max long-term frame index is set and current picture is
* marked as long term reference picture. Last position reserved for
* end memory_management_control_operation command */
#define MAX_NUM_MMC_OPERATIONS (2*MAX_NUM_REF_PICS+2+1)
/* structure to store decoded reference picture marking data */
typedef struct
{
u32 noOutputOfPriorPicsFlag;
u32 longTermReferenceFlag;
u32 adaptiveRefPicMarkingModeFlag;
memoryManagementOperation_t operation[MAX_NUM_MMC_OPERATIONS];
} decRefPicMarking_t;
/* structure to store slice header data decoded from the stream */
typedef struct
{
u32 firstMbInSlice;
u32 sliceType;
u32 picParameterSetId;
u32 frameNum;
u32 idrPicId;
u32 picOrderCntLsb;
i32 deltaPicOrderCntBottom;
i32 deltaPicOrderCnt[2];
u32 redundantPicCnt;
u32 numRefIdxActiveOverrideFlag;
u32 numRefIdxL0Active;
i32 sliceQpDelta;
u32 disableDeblockingFilterIdc;
i32 sliceAlphaC0Offset;
i32 sliceBetaOffset;
u32 sliceGroupChangeCycle;
refPicListReordering_t refPicListReordering;
decRefPicMarking_t decRefPicMarking;
} sliceHeader_t;
/*------------------------------------------------------------------------------
4. Function prototypes
------------------------------------------------------------------------------*/
u32 h264bsdDecodeSliceHeader(strmData_t *pStrmData,
sliceHeader_t *pSliceHeader,
seqParamSet_t *pSeqParamSet,
picParamSet_t *pPicParamSet,
nalUnit_t *pNalUnit);
u32 h264bsdCheckPpsId(strmData_t *pStrmData, u32 *ppsId);
u32 h264bsdCheckFrameNum(
strmData_t *pStrmData,
u32 maxFrameNum,
u32 *frameNum);
u32 h264bsdCheckIdrPicId(
strmData_t *pStrmData,
u32 maxFrameNum,
nalUnitType_e nalUnitType,
u32 *idrPicId);
u32 h264bsdCheckPicOrderCntLsb(
strmData_t *pStrmData,
seqParamSet_t *pSeqParamSet,
nalUnitType_e nalUnitType,
u32 *picOrderCntLsb);
u32 h264bsdCheckDeltaPicOrderCntBottom(
strmData_t *pStrmData,
seqParamSet_t *pSeqParamSet,
nalUnitType_e nalUnitType,
i32 *deltaPicOrderCntBottom);
u32 h264bsdCheckDeltaPicOrderCnt(
strmData_t *pStrmData,
seqParamSet_t *pSeqParamSet,
nalUnitType_e nalUnitType,
u32 picOrderPresentFlag,
i32 *deltaPicOrderCnt);
u32 h264bsdCheckRedundantPicCnt(
strmData_t *pStrmData,
seqParamSet_t *pSeqParamSet,
picParamSet_t *pPicParamSet,
nalUnitType_e nalUnitType,
u32 *redundantPicCnt);
u32 h264bsdCheckPriorPicsFlag(u32 * noOutputOfPriorPicsFlag,
const strmData_t * pStrmData,
const seqParamSet_t * pSeqParamSet,
const picParamSet_t * pPicParamSet,
nalUnitType_e nalUnitType);
#endif /* #ifdef H264SWDEC_SLICE_HEADER_H */