mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
96 lines
3.4 KiB
C
96 lines
3.4 KiB
C
/*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* Libav is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* H.264 decoder/parser shared code
|
|
*/
|
|
|
|
#ifndef AVCODEC_H264_PARSE_H
|
|
#define AVCODEC_H264_PARSE_H
|
|
|
|
#include "get_bits.h"
|
|
|
|
typedef struct H264PredWeightTable {
|
|
int use_weight;
|
|
int use_weight_chroma;
|
|
int luma_log2_weight_denom;
|
|
int chroma_log2_weight_denom;
|
|
int luma_weight_flag[2]; ///< 7.4.3.2 luma_weight_lX_flag
|
|
int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag
|
|
// The following 2 can be changed to int8_t but that causes a 10 CPU cycles speed loss
|
|
int luma_weight[48][2][2];
|
|
int chroma_weight[48][2][2][2];
|
|
int implicit_weight[48][48][2];
|
|
} H264PredWeightTable;
|
|
|
|
typedef struct H264POCContext {
|
|
int poc_lsb;
|
|
int poc_msb;
|
|
int delta_poc_bottom;
|
|
int delta_poc[2];
|
|
int frame_num;
|
|
int prev_poc_msb; ///< poc_msb of the last reference pic for POC type 0
|
|
int prev_poc_lsb; ///< poc_lsb of the last reference pic for POC type 0
|
|
int frame_num_offset; ///< for POC type 2
|
|
int prev_frame_num_offset; ///< for POC type 2
|
|
int prev_frame_num; ///< frame_num of the last pic for POC type 1/2
|
|
} H264POCContext;
|
|
|
|
struct SPS;
|
|
struct PPS;
|
|
struct H264ParamSets;
|
|
|
|
int ff_h264_pred_weight_table(GetBitContext *gb, const struct SPS *sps,
|
|
const int *ref_count, int slice_type_nos,
|
|
H264PredWeightTable *pwt);
|
|
|
|
/**
|
|
* Check if the top & left blocks are available if needed & change the
|
|
* dc mode so it only uses the available blocks.
|
|
*/
|
|
int ff_h264_check_intra4x4_pred_mode(int8_t *pred_mode_cache, void *logctx,
|
|
int top_samples_available, int left_samples_available);
|
|
|
|
/**
|
|
* Check if the top & left blocks are available if needed & change the
|
|
* dc mode so it only uses the available blocks.
|
|
*/
|
|
int ff_h264_check_intra_pred_mode(void *logctx, int top_samples_available,
|
|
int left_samples_available,
|
|
int mode, int is_chroma);
|
|
|
|
int ff_h264_parse_ref_count(int *plist_count, int ref_count[2],
|
|
GetBitContext *gb, const struct PPS *pps,
|
|
int slice_type_nos, int picture_structure);
|
|
|
|
int ff_h264_init_poc(int pic_field_poc[2], int *pic_poc,
|
|
const struct SPS *sps, H264POCContext *poc,
|
|
int picture_structure, int nal_ref_idc);
|
|
|
|
int ff_h264_decode_extradata(const uint8_t *data, int size, struct H264ParamSets *ps,
|
|
int *is_avc, int *nal_length_size,
|
|
int err_recognition, void *logctx);
|
|
|
|
/**
|
|
* compute profile from sps
|
|
*/
|
|
int ff_h264_get_profile(const struct SPS *sps);
|
|
|
|
#endif /* AVCODEC_H264_PARSE_H */
|