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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 | |
30 | uint8_t ff_h264_cabac_tables[512 + 4*2*64 + 4*64 + 63]; | |
31 | ||
32 | static 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 | ||
51 | static 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 | ||
62 | static 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 | ||
73 | static 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 | ||
80 | static 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 */ |