Imported Debian version 2.5.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / cabac_tablegen.h
CommitLineData
2ba45a60
DM
1/*
2 * Header file for hardcoded CABAC table
3 *
4 * Copyright (c) 2014 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23#ifndef AVCODEC_CABAC_TABLEGEN_H
24#define AVCODEC_CABAC_TABLEGEN_H
25
26#if CONFIG_HARDCODED_TABLES
27#define cabac_tableinit()
28#include "libavcodec/cabac_tables.h"
29#else
30uint8_t ff_h264_cabac_tables[512 + 4*2*64 + 4*64 + 63];
31
32static const uint8_t lps_range[64][4]= {
33{128,176,208,240}, {128,167,197,227}, {128,158,187,216}, {123,150,178,205},
34{116,142,169,195}, {111,135,160,185}, {105,128,152,175}, {100,122,144,166},
35{ 95,116,137,158}, { 90,110,130,150}, { 85,104,123,142}, { 81, 99,117,135},
36{ 77, 94,111,128}, { 73, 89,105,122}, { 69, 85,100,116}, { 66, 80, 95,110},
37{ 62, 76, 90,104}, { 59, 72, 86, 99}, { 56, 69, 81, 94}, { 53, 65, 77, 89},
38{ 51, 62, 73, 85}, { 48, 59, 69, 80}, { 46, 56, 66, 76}, { 43, 53, 63, 72},
39{ 41, 50, 59, 69}, { 39, 48, 56, 65}, { 37, 45, 54, 62}, { 35, 43, 51, 59},
40{ 33, 41, 48, 56}, { 32, 39, 46, 53}, { 30, 37, 43, 50}, { 29, 35, 41, 48},
41{ 27, 33, 39, 45}, { 26, 31, 37, 43}, { 24, 30, 35, 41}, { 23, 28, 33, 39},
42{ 22, 27, 32, 37}, { 21, 26, 30, 35}, { 20, 24, 29, 33}, { 19, 23, 27, 31},
43{ 18, 22, 26, 30}, { 17, 21, 25, 28}, { 16, 20, 23, 27}, { 15, 19, 22, 25},
44{ 14, 18, 21, 24}, { 14, 17, 20, 23}, { 13, 16, 19, 22}, { 12, 15, 18, 21},
45{ 12, 14, 17, 20}, { 11, 14, 16, 19}, { 11, 13, 15, 18}, { 10, 12, 15, 17},
46{ 10, 12, 14, 16}, { 9, 11, 13, 15}, { 9, 11, 12, 14}, { 8, 10, 12, 14},
47{ 8, 9, 11, 13}, { 7, 9, 11, 12}, { 7, 9, 10, 12}, { 7, 8, 10, 11},
48{ 6, 8, 9, 11}, { 6, 7, 9, 10}, { 6, 7, 8, 9}, { 2, 2, 2, 2},
49};
50
51static const uint8_t mps_state[64]= {
52 1, 2, 3, 4, 5, 6, 7, 8,
53 9,10,11,12,13,14,15,16,
54 17,18,19,20,21,22,23,24,
55 25,26,27,28,29,30,31,32,
56 33,34,35,36,37,38,39,40,
57 41,42,43,44,45,46,47,48,
58 49,50,51,52,53,54,55,56,
59 57,58,59,60,61,62,62,63,
60};
61
62static const uint8_t lps_state[64]= {
63 0, 0, 1, 2, 2, 4, 4, 5,
64 6, 7, 8, 9, 9,11,11,12,
65 13,13,15,15,16,16,18,18,
66 19,19,21,21,22,22,23,24,
67 24,25,26,26,27,27,28,29,
68 29,30,30,30,31,32,32,33,
69 33,33,34,34,35,35,35,36,
70 36,36,37,37,37,38,38,63,
71};
72
73static const uint8_t last_coeff_flag_offset_8x8[63] = {
74 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
75 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
76 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
77 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8
78};
79
80static av_cold void cabac_tableinit(void)
81{
82 int i, j;
83 for (i = 0; i < 512; i++)
84 ff_h264_norm_shift[i] = i ? 8 - av_log2(i) : 9;
85
86 for(i=0; i<64; i++){
87 for(j=0; j<4; j++){ //FIXME check if this is worth the 1 shift we save
88 ff_h264_lps_range[j*2*64+2*i+0]=
89 ff_h264_lps_range[j*2*64+2*i+1]= lps_range[i][j];
90 }
91 ff_h264_mlps_state[128 + 2 * i + 0] = 2 * mps_state[i] + 0;
92 ff_h264_mlps_state[128 + 2 * i + 1] = 2 * mps_state[i] + 1;
93
94 if( i ){
95 ff_h264_mlps_state[128-2*i-1]= 2*lps_state[i]+0;
96 ff_h264_mlps_state[128-2*i-2]= 2*lps_state[i]+1;
97 }else{
98 ff_h264_mlps_state[128-2*i-1]= 1;
99 ff_h264_mlps_state[128-2*i-2]= 0;
100 }
101 }
102 for(i=0; i< 63; i++){
103 ff_h264_last_coeff_flag_offset_8x8[i] = last_coeff_flag_offset_8x8[i];
104 }
105}
106#endif /* CONFIG_HARDCODED_TABLES */
107
108#endif /* AVCODEC_CABAC_TABLEGEN_H */