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/*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; 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 10cpu cycles speedloss
int luma_weight[48][2][2];
int chroma_weight[48][2][2][2];
int implicit_weight[48][48][2];
} H264PredWeightTable;
struct SPS;
struct PPS;
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, void *logctx);
#endif /* AVCODEC_H264_PARSE_H */
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