2 * This file is part of Libav.
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 * H.264 decoder/parser shared code
24 #ifndef AVCODEC_H264_PARSE_H
25 #define AVCODEC_H264_PARSE_H
29 typedef struct H264PredWeightTable {
31 int use_weight_chroma;
32 int luma_log2_weight_denom;
33 int chroma_log2_weight_denom;
34 int luma_weight_flag[2]; ///< 7.4.3.2 luma_weight_lX_flag
35 int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag
36 // The following 2 can be changed to int8_t but that causes 10cpu cycles speedloss
37 int luma_weight[48][2][2];
38 int chroma_weight[48][2][2][2];
39 int implicit_weight[48][48][2];
40 } H264PredWeightTable;
45 int ff_h264_pred_weight_table(GetBitContext *gb, const struct SPS *sps,
46 const int *ref_count, int slice_type_nos,
47 H264PredWeightTable *pwt);
50 * Check if the top & left blocks are available if needed & change the
51 * dc mode so it only uses the available blocks.
53 int ff_h264_check_intra4x4_pred_mode(int8_t *pred_mode_cache, void *logctx,
54 int top_samples_available, int left_samples_available);
57 * Check if the top & left blocks are available if needed & change the
58 * dc mode so it only uses the available blocks.
60 int ff_h264_check_intra_pred_mode(void *logctx, int top_samples_available,
61 int left_samples_available,
62 int mode, int is_chroma);
64 int ff_h264_parse_ref_count(int *plist_count, int ref_count[2],
65 GetBitContext *gb, const struct PPS *pps,
66 int slice_type_nos, int picture_structure);
68 #endif /* AVCODEC_H264_PARSE_H */