| 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 */ |