1/* 2 * copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> 3 * copyright (c) 2004 Maarten Daniels 4 * 5 * This file is part of Libav. 6 * 7 * Libav is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * Libav is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with Libav; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22/** 23 * @file 24 * H.261 tables. 25 */ 26 27#ifndef AVCODEC_H261DATA_H 28#define AVCODEC_H261DATA_H 29 30#include <stdint.h> 31#include "h261.h" 32 33// H.261 VLC table for macroblock addressing 34static const uint8_t h261_mba_code[35] = { 35 1, 3, 2, 3, 36 2, 3, 2, 7, 37 6, 11, 10, 9, 38 8, 7, 6, 23, 39 22, 21, 20, 19, 40 18, 35, 34, 33, 41 32, 31, 30, 29, 42 28, 27, 26, 25, 43 24, 44 15, //(MBA stuffing) 45 1 //(start code) 46}; 47 48static const uint8_t h261_mba_bits[35] = { 49 1, 3, 3, 4, 50 4, 5, 5, 7, 51 7, 8, 8, 8, 52 8, 8, 8, 10, 53 10, 10, 10, 10, 54 10, 11, 11, 11, 55 11, 11, 11, 11, 56 11, 11, 11, 11, 57 11, 58 11, //(MBA stuffing) 59 16 //(start code) 60}; 61 62//H.261 VLC table for macroblock type 63static const uint8_t h261_mtype_code[10] = { 64 1, 1, 1, 1, 65 1, 1, 1, 1, 66 1, 1 67}; 68 69static const uint8_t h261_mtype_bits[10] = { 70 4, 7, 1, 5, 71 9, 8, 10, 3, 72 2, 6 73}; 74 75static const int h261_mtype_map[10]= { 76 MB_TYPE_INTRA4x4, 77 MB_TYPE_INTRA4x4 | MB_TYPE_QUANT, 78 MB_TYPE_CBP, 79 MB_TYPE_QUANT | MB_TYPE_CBP, 80 MB_TYPE_16x16, 81 MB_TYPE_CBP | MB_TYPE_16x16, 82 MB_TYPE_QUANT | MB_TYPE_CBP | MB_TYPE_16x16, 83 MB_TYPE_16x16 | MB_TYPE_H261_FIL, 84 MB_TYPE_CBP | MB_TYPE_16x16 | MB_TYPE_H261_FIL, 85 MB_TYPE_QUANT | MB_TYPE_CBP | MB_TYPE_16x16 | MB_TYPE_H261_FIL 86}; 87 88//H.261 VLC table for motion vectors 89static const uint8_t h261_mv_tab[17][2] = { 90 {1,1}, {1,2}, {1,3}, {1,4}, {3,6}, {5,7}, {4,7}, {3,7}, 91 {11,9}, {10,9}, {9,9}, {17,10}, {16,10}, {15,10}, {14,10}, {13,10}, {12,10} 92}; 93 94static const int mvmap[17] = 95{ 96 0, -1, -2, -3, -4, -5, -6, -7, -8, -9, -10, -11, -12, -13, -14, -15, -16 97}; 98 99//H.261 VLC table for coded block pattern 100static const uint8_t h261_cbp_tab[63][2] = 101{ 102 {11,5}, {9,5}, {13,6}, {13,4}, {23,7}, {19,7}, {31,8}, {12,4}, 103 {22,7}, {18,7}, {30,8}, {19,5}, {27,8}, {23,8}, {19,8}, {11,4}, 104 {21,7}, {17,7}, {29,8}, {17,5}, {25,8}, {21,8}, {17,8}, {15,6}, 105 {15,8}, {13,8}, {3,9}, {15,5}, {11,8}, {7,8}, {7,9}, {10,4}, 106 {20,7}, {16,7}, {28,8}, {14,6}, {14,8}, {12,8}, {2,9}, {16,5}, 107 {24,8}, {20,8}, {16,8}, {14,5}, {10,8}, {6,8}, {6,9}, {18,5}, 108 {26,8}, {22,8}, {18,8}, {13,5}, {9,8}, {5,8}, {5,9}, {12,5}, 109 {8,8}, {4,8}, {4,9}, {7,3}, {10,5}, {8,5}, {12,6} 110}; 111 112//H.261 VLC table for transform coefficients 113static const uint16_t h261_tcoeff_vlc[65][2] = { 114{ 0x2, 2 }, { 0x3, 2 },{ 0x4, 4 },{ 0x5, 5 }, 115{ 0x6, 7 },{ 0x26, 8 },{ 0x21, 8 },{ 0xa, 10 }, 116{ 0x1d, 12 },{ 0x18, 12 },{ 0x13, 12 },{ 0x10 , 12 }, 117{ 0x1a, 13},{ 0x19, 13 }, { 0x18, 13 }, { 0x17, 13 }, 118{ 0x3, 3 }, { 0x6, 6 }, { 0x25 , 8 }, { 0xc, 10 }, 119{ 0x1b, 12 }, { 0x16, 13 }, { 0x15, 13 }, { 0x5, 4}, 120{ 0x4, 7}, { 0xb, 10 }, { 0x14, 12 }, { 0x14, 13 }, 121{ 0x7, 5 }, { 0x24, 8 }, { 0x1c, 12 }, { 0x13, 13 }, 122{ 0x6, 5 }, { 0xf, 10 }, { 0x12, 12}, { 0x7, 6}, 123{ 0x9 , 10 }, { 0x12, 13 }, { 0x5, 6 }, { 0x1e, 12 }, 124{ 0x4, 6 }, { 0x15, 12 }, { 0x7, 7 }, { 0x11, 12}, 125{ 0x5, 7 }, { 0x11, 13 }, { 0x27, 8 }, { 0x10, 13 }, 126{ 0x23, 8 }, { 0x22, 8 }, { 0x20, 8 }, { 0xe , 10 }, 127{ 0xd, 10 }, { 0x8, 10 },{ 0x1f, 12 }, { 0x1a, 12 }, 128{ 0x19, 12 }, { 0x17, 12 }, { 0x16, 12}, { 0x1f, 13}, 129{ 0x1e, 13 }, { 0x1d, 13 }, { 0x1c, 13}, { 0x1b, 13}, 130{ 0x1, 6 } //escape 131}; 132 133static const int8_t h261_tcoeff_level[64] = { 134 0, 1, 2, 3, 4, 5, 6, 7, 135 8, 9, 10, 11, 12, 13, 14, 15, 136 1, 2, 3, 4, 5, 6, 7, 1, 137 2, 3, 4, 5, 1, 2, 3, 4, 138 1, 2, 3, 1, 2, 3, 1, 2, 139 1, 2, 1, 2, 1, 2, 1, 2, 140 1, 1, 1, 1, 1, 1, 1, 1, 141 1, 1, 1, 1, 1, 1, 1, 1 142}; 143 144static const int8_t h261_tcoeff_run[64] = { 145 0, 146 0, 0, 0, 0, 0, 0, 0, 0, 147 0, 0, 0, 0, 0, 0, 0, 1, 148 1, 1, 1, 1, 1, 1, 2, 2, 149 2, 2, 2, 3, 3, 3, 3, 4, 150 4, 4, 5, 5, 5, 6, 6, 7, 151 7, 8, 8, 9, 9, 10, 10, 11, 152 12, 13, 14, 15, 16, 17, 18, 19, 153 20, 21, 22, 23, 24, 25, 26 154}; 155 156static RLTable h261_rl_tcoeff = { 157 64, 158 64, 159 h261_tcoeff_vlc, 160 h261_tcoeff_run, 161 h261_tcoeff_level, 162}; 163 164#endif /* AVCODEC_H261DATA_H */ 165