1/* 2 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder. 3 * Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de> 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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 * Chinese AVS video (AVS1-P2, JiZhun profile) decoder 25 * @author Stefan Gehrer <stefan.gehrer@gmx.de> 26 */ 27 28#include "libavutil/avassert.h" 29#include "avcodec.h" 30#include "get_bits.h" 31#include "golomb.h" 32#include "cavs.h" 33#include "codec_internal.h" 34#include "internal.h" 35#include "mathops.h" 36#include "mpeg12data.h" 37#include "startcode.h" 38 39static const uint8_t mv_scan[4] = { 40 MV_FWD_X0, MV_FWD_X1, 41 MV_FWD_X2, MV_FWD_X3 42}; 43 44static const uint8_t cbp_tab[64][2] = { 45 { 63, 0 }, { 15, 15 }, { 31, 63 }, { 47, 31 }, { 0, 16 }, { 14, 32 }, { 13, 47 }, { 11, 13 }, 46 { 7, 14 }, { 5, 11 }, { 10, 12 }, { 8, 5 }, { 12, 10 }, { 61, 7 }, { 4, 48 }, { 55, 3 }, 47 { 1, 2 }, { 2, 8 }, { 59, 4 }, { 3, 1 }, { 62, 61 }, { 9, 55 }, { 6, 59 }, { 29, 62 }, 48 { 45, 29 }, { 51, 27 }, { 23, 23 }, { 39, 19 }, { 27, 30 }, { 46, 28 }, { 53, 9 }, { 30, 6 }, 49 { 43, 60 }, { 37, 21 }, { 60, 44 }, { 16, 26 }, { 21, 51 }, { 28, 35 }, { 19, 18 }, { 35, 20 }, 50 { 42, 24 }, { 26, 53 }, { 44, 17 }, { 32, 37 }, { 58, 39 }, { 24, 45 }, { 20, 58 }, { 17, 43 }, 51 { 18, 42 }, { 48, 46 }, { 22, 36 }, { 33, 33 }, { 25, 34 }, { 49, 40 }, { 40, 52 }, { 36, 49 }, 52 { 34, 50 }, { 50, 56 }, { 52, 25 }, { 54, 22 }, { 41, 54 }, { 56, 57 }, { 38, 41 }, { 57, 38 } 53}; 54 55static const uint8_t scan3x3[4] = { 4, 5, 7, 8 }; 56 57static const uint8_t dequant_shift[64] = { 58 14, 14, 14, 14, 14, 14, 14, 14, 59 13, 13, 13, 13, 13, 13, 13, 13, 60 13, 12, 12, 12, 12, 12, 12, 12, 61 11, 11, 11, 11, 11, 11, 11, 11, 62 11, 10, 10, 10, 10, 10, 10, 10, 63 10, 9, 9, 9, 9, 9, 9, 9, 64 9, 8, 8, 8, 8, 8, 8, 8, 65 7, 7, 7, 7, 7, 7, 7, 7 66}; 67 68static const uint16_t dequant_mul[64] = { 69 32768, 36061, 38968, 42495, 46341, 50535, 55437, 60424, 70 32932, 35734, 38968, 42495, 46177, 50535, 55109, 59933, 71 65535, 35734, 38968, 42577, 46341, 50617, 55027, 60097, 72 32809, 35734, 38968, 42454, 46382, 50576, 55109, 60056, 73 65535, 35734, 38968, 42495, 46320, 50515, 55109, 60076, 74 65535, 35744, 38968, 42495, 46341, 50535, 55099, 60087, 75 65535, 35734, 38973, 42500, 46341, 50535, 55109, 60097, 76 32771, 35734, 38965, 42497, 46341, 50535, 55109, 60099 77}; 78 79#define EOB 0, 0, 0 80 81static const struct dec_2dvlc intra_dec[7] = { 82 { 83 { //level / run / table_inc 84 { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 }, 85 { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 }, 86 { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 }, 87 { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, 88 { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 }, 89 { 1, 15, 1 }, { -1, 15, 1 }, { 2, 2, 2 }, { -2, 2, 2 }, { 1, 16, 1 }, { -1, 16, 1 }, 90 { 1, 17, 1 }, { -1, 17, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 18, 1 }, { -1, 18, 1 }, 91 { 1, 19, 1 }, { -1, 19, 1 }, { 2, 3, 2 }, { -2, 3, 2 }, { 1, 20, 1 }, { -1, 20, 1 }, 92 { 1, 21, 1 }, { -1, 21, 1 }, { 2, 4, 2 }, { -2, 4, 2 }, { 1, 22, 1 }, { -1, 22, 1 }, 93 { 2, 5, 2 }, { -2, 5, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { EOB } 94 }, 95 //level_add 96 { 0, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1 }, 97 2, //golomb_order 98 0, //inc_limit 99 23, //max_run 100 }, 101 { 102 { //level / run 103 { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 }, { -2, 1, 1 }, 104 { 1, 3, 0 }, { -1, 3, 0 }, { EOB }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 }, 105 { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 2, 2, 1 }, 106 { -2, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 1, 9, 0 }, 107 { -1, 9, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 4, 1, 2 }, { -4, 1, 2 }, { 1, 10, 0 }, 108 { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 3, 2, 2 }, 109 { -3, 2, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 5, 1, 3 }, 110 { -5, 1, 3 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 14, 0 }, 111 { -1, 14, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 2, 8, 1 }, { -2, 8, 1 }, { 3, 3, 2 }, 112 { -3, 3, 2 }, { 6, 1, 3 }, { -6, 1, 3 }, { 1, 15, 0 }, { -1, 15, 0 } 113 }, 114 //level_add 115 { 0, 7, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 116 2, //golomb_order 117 1, //inc_limit 118 15, //max_run 119 }, 120 { 121 { //level / run 122 { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, 123 { 3, 1, 1 }, { -3, 1, 1 }, { EOB }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 }, 124 { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 }, 125 { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 }, 126 { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 2, 4, 0 }, 127 { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 }, 128 { -7, 1, 2 }, { 3, 3, 1 }, { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 }, 129 { -1, 8, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 3 }, { -8, 1, 3 }, { 1, 9, 0 }, 130 { -1, 9, 0 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 }, { 2, 7, 0 }, 131 { -2, 7, 0 }, { 9, 1, 3 }, { -9, 1, 3 }, { 1, 10, 0 }, { -1, 10, 0 } 132 }, 133 //level_add 134 { 0, 10, 6, 4, 4, 3, 3, 3, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 135 2, //golomb_order 136 2, //inc_limit 137 10, //max_run 138 }, 139 { 140 { //level / run 141 { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, 142 { 1, 2, 0 }, { -1, 2, 0 }, { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 1 }, 143 { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 1 }, 144 { -6, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 }, 145 { -1, 4, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 }, 146 { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 5, 2, 1 }, 147 { -5, 2, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 10, 1, 2 }, {-10, 1, 2 }, { 3, 3, 0 }, 148 { -3, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 11, 1, 3 }, {-11, 1, 3 }, { 6, 2, 1 }, 149 { -6, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 5, 0 }, { -2, 5, 0 }, { 3, 4, 0 }, 150 { -3, 4, 0 }, { 12, 1, 3 }, {-12, 1, 3 }, { 4, 3, 0 }, { -4, 3, 0 } 151 }, 152 //level_add 153 { 0, 13, 7, 5, 4, 3, 2, 2, -1, -1, -1 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 154 2, //golomb_order 155 4, //inc_limit 156 7, //max_run 157 }, 158 { 159 { //level / run 160 { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, 161 { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 }, 162 { -6, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 1 }, 163 { -8, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 10, 1, 1 }, 164 {-10, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 2 }, 165 {-11, 1, 2 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 13, 1, 2 }, 166 {-13, 1, 2 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 }, 167 { -2, 3, 0 }, { 14, 1, 2 }, {-14, 1, 2 }, { 6, 2, 0 }, { -6, 2, 0 }, { 15, 1, 2 }, 168 {-15, 1, 2 }, { 16, 1, 2 }, {-16, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 5, 0 }, 169 { -1, 5, 0 }, { 7, 2, 0 }, { -7, 2, 0 }, { 17, 1, 2 }, {-17, 1, 2 } 170 }, 171 //level_add 172 { 0,18, 8, 4, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 173 2, //golomb_order 174 7, //inc_limit 175 5, //max_run 176 }, 177 { 178 { //level / run 179 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, 180 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 }, 181 { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 }, 182 { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 11, 1, 1 }, 183 {-11, 1, 1 }, { 12, 1, 1 }, {-12, 1, 1 }, { 13, 1, 1 }, {-13, 1, 1 }, { 2, 2, 0 }, 184 { -2, 2, 0 }, { 14, 1, 1 }, {-14, 1, 1 }, { 15, 1, 1 }, {-15, 1, 1 }, { 3, 2, 0 }, 185 { -3, 2, 0 }, { 16, 1, 1 }, {-16, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 17, 1, 1 }, 186 {-17, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 18, 1, 1 }, {-18, 1, 1 }, { 5, 2, 0 }, 187 { -5, 2, 0 }, { 19, 1, 1 }, {-19, 1, 1 }, { 20, 1, 1 }, {-20, 1, 1 }, { 6, 2, 0 }, 188 { -6, 2, 0 }, { 21, 1, 1 }, {-21, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 } 189 }, 190 //level_add 191 { 0, 22, 7, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 192 2, //golomb_order 193 10, //inc_limit 194 3, //max_run 195 }, 196 { 197 { //level / run 198 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, 199 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 }, 200 { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 }, 201 { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 11, 1, 0 }, {-11, 1, 0 }, { 12, 1, 0 }, 202 {-12, 1, 0 }, { 13, 1, 0 }, {-13, 1, 0 }, { 14, 1, 0 }, {-14, 1, 0 }, { 15, 1, 0 }, 203 {-15, 1, 0 }, { 16, 1, 0 }, {-16, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 17, 1, 0 }, 204 {-17, 1, 0 }, { 18, 1, 0 }, {-18, 1, 0 }, { 19, 1, 0 }, {-19, 1, 0 }, { 20, 1, 0 }, 205 {-20, 1, 0 }, { 21, 1, 0 }, {-21, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 22, 1, 0 }, 206 {-22, 1, 0 }, { 23, 1, 0 }, {-23, 1, 0 }, { 24, 1, 0 }, {-24, 1, 0 }, { 25, 1, 0 }, 207 {-25, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 26, 1, 0 }, {-26, 1, 0 } 208 }, 209 //level_add 210 { 0, 27, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 211 2, //golomb_order 212 INT_MAX, //inc_limit 213 2, //max_run 214 } 215}; 216 217static const struct dec_2dvlc inter_dec[7] = { 218 { 219 { //level / run 220 { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 }, 221 { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 }, 222 { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 }, 223 { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 1, 12, 1 }, { -1, 12, 1 }, 224 { 1, 13, 1 }, { -1, 13, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 14, 1 }, { -1, 14, 1 }, 225 { 1, 15, 1 }, { -1, 15, 1 }, { 1, 16, 1 }, { -1, 16, 1 }, { 1, 17, 1 }, { -1, 17, 1 }, 226 { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, 227 { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 2, 2, 2 }, { -2, 2, 2 }, 228 { 1, 22, 1 }, { -1, 22, 1 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 }, 229 { 1, 25, 1 }, { -1, 25, 1 }, { 1, 26, 1 }, { -1, 26, 1 }, { EOB } 230 }, 231 //level_add 232 { 0, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 }, 233 3, //golomb_order 234 0, //inc_limit 235 26 //max_run 236 }, 237 { 238 { //level / run 239 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 1, 3, 0 }, 240 { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 }, 241 { -1, 6, 0 }, { 2, 1, 1 }, { -2, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 }, 242 { -1, 8, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 2, 2, 1 }, 243 { -2, 2, 1 }, { 1, 11, 0 }, { -1, 11, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 1, 2 }, 244 { -3, 1, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 }, { -1, 14, 0 }, { 2, 3, 1 }, 245 { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 1, 16, 0 }, 246 { -1, 16, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 1, 17, 0 }, { -1, 17, 0 }, { 4, 1, 3 }, 247 { -4, 1, 3 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 18, 0 }, { -1, 18, 0 }, { 1, 19, 0 }, 248 { -1, 19, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 3, 2, 2 }, { -3, 2, 2 } 249 }, 250 //level_add 251 { 0, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1 }, 252 2, //golomb_order 253 1, //inc_limit 254 19 //max_run 255 }, 256 { 257 { //level / run 258 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 0 }, 259 { -2, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 3, 1, 1 }, 260 { -3, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 }, 261 { -1, 6, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 1, 2 }, 262 { -4, 1, 2 }, { 1, 8, 0 }, { -1, 8, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 4, 0 }, 263 { -2, 4, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 5, 1, 2 }, 264 { -5, 1, 2 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 6, 0 }, 265 { -2, 6, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 3, 1 }, { -3, 3, 1 }, { 6, 1, 2 }, 266 { -6, 1, 2 }, { 4, 2, 2 }, { -4, 2, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 7, 0 }, 267 { -2, 7, 0 }, { 3, 4, 1 }, { -3, 4, 1 }, { 1, 14, 0 }, { -1, 14, 0 } 268 }, 269 //level_add 270 { 0, 7, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 271 2, //golomb_order 272 2, //inc_limit 273 14 //max_run 274 }, 275 { 276 { //level / run 277 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 }, 278 { -1, 2, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 }, 279 { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 1 }, 280 { -5, 1, 1 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 2, 3, 0 }, 281 { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 2, 4, 0 }, 282 { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 }, 283 { -7, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 5, 0 }, 284 { -2, 5, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 4, 0 }, 285 { -3, 4, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 1, 10, 0 }, 286 { -1, 10, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 4, 3, 1 }, { -4, 3, 1 } 287 }, 288 //level_add 289 { 0,10, 6, 5, 4, 3, 3, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 290 2, //golomb_order 291 3, //inc_limit 292 10 //max_run 293 }, 294 { 295 { //level / run 296 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, 297 { -3, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, 298 { -5, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 0 }, 299 { -6, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 }, 300 { -1, 4, 0 }, { 8, 1, 1 }, { -8, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 }, 301 { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 5, 2, 0 }, 302 { -5, 2, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 10, 1, 2 }, 303 {-10, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 11, 1, 2 }, {-11, 1, 2 }, { 1, 7, 0 }, 304 { -1, 7, 0 }, { 6, 2, 0 }, { -6, 2, 0 }, { 3, 4, 0 }, { -3, 4, 0 }, { 2, 5, 0 }, 305 { -2, 5, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 4, 3, 0 }, { -4, 3, 0 } 306 }, 307 //level_add 308 { 0, 13, 7, 5, 4, 3, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 309 2, //golomb_order 310 6, //inc_limit 311 7 //max_run 312 }, 313 { 314 { //level / run 315 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, 316 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 1, 2, 0 }, 317 { -1, 2, 0 }, { 6, 1, 0 }, { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, 318 { -8, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 1, 3, 0 }, 319 { -1, 3, 0 }, { 10, 1, 1 }, { -10, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 1 }, 320 { -11, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 1 }, { -12, 1, 1 }, { 1, 4, 0 }, 321 { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 13, 1, 1 }, { -13, 1, 1 }, { 5, 2, 0 }, 322 { -5, 2, 0 }, { 14, 1, 1 }, { -14, 1, 1 }, { 6, 2, 0 }, { -6, 2, 0 }, { 1, 5, 0 }, 323 { -1, 5, 0 }, { 15, 1, 1 }, { -15, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 16, 1, 1 }, 324 { -16, 1, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 2, 0 }, { -7, 2, 0 } 325 }, 326 //level_add 327 { 0, 17, 8, 4, 3, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 328 2, //golomb_order 329 9, //inc_limit 330 5 //max_run 331 }, 332 { 333 { //level / run 334 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, 335 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 }, 336 { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 8, 1, 0 }, 337 { -8, 1, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 }, 338 { -11, 1, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 13, 1, 0 }, 339 { -13, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 15, 1, 0 }, 340 { -15, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 16, 1, 0 }, { -16, 1, 0 }, { 17, 1, 0 }, 341 { -17, 1, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 19, 1, 0 }, 342 { -19, 1, 0 }, { 20, 1, 0 }, { -20, 1, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 1, 4, 0 }, 343 { -1, 4, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 21, 1, 0 }, { -21, 1, 0 } 344 }, 345 //level_add 346 { 0, 22, 6, 3, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 347 2, //golomb_order 348 INT_MAX, //inc_limit 349 4 //max_run 350 } 351}; 352 353static const struct dec_2dvlc chroma_dec[5] = { 354 { 355 { //level / run 356 { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 }, 357 { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 }, 358 { 1, 7, 1 }, { -1, 7, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 8, 1 }, { -1, 8, 1 }, 359 { 1, 9, 1 }, { -1, 9, 1 }, { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, 360 { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 }, 361 { 1, 15, 1 }, { -1, 15, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 16, 1 }, { -1, 16, 1 }, 362 { 1, 17, 1 }, { -1, 17, 1 }, { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 }, 363 { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 1, 22, 1 }, { -1, 22, 1 }, 364 { 2, 2, 2 }, { -2, 2, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 }, 365 { 1, 25, 1 }, { -1, 25, 1 }, { 4, 1, 3 }, { -4, 1, 3 }, { EOB } 366 }, 367 //level_add 368 { 0, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1 }, 369 2, //golomb_order 370 0, //inc_limit 371 25 //max_run 372 }, 373 { 374 { //level / run 375 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 }, 376 { -2, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 }, 377 { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 1, 7, 0 }, 378 { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 2, 1 }, { -2, 2, 1 }, { 1, 9, 0 }, 379 { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 4, 1, 2 }, 380 { -4, 1, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 }, 381 { -1, 14, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 }, 382 { -2, 4, 1 }, { 5, 1, 3 }, { -5, 1, 3 }, { 3, 2, 2 }, { -3, 2, 2 }, { 1, 16, 0 }, 383 { -1, 16, 0 }, { 1, 17, 0 }, { -1, 17, 0 }, { 1, 18, 0 }, { -1, 18, 0 }, { 2, 5, 1 }, 384 { -2, 5, 1 }, { 1, 19, 0 }, { -1, 19, 0 }, { 1, 20, 0 }, { -1, 20, 0 } 385 }, 386 //level_add 387 { 0, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1 }, 388 0, //golomb_order 389 1, //inc_limit 390 20 //max_run 391 }, 392 { 393 { //level / run 394 { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 }, 395 { -1, 2, 0 }, { 3, 1, 1 }, { -3, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 4, 1, 1 }, 396 { -4, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 }, 397 { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 }, 398 { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 1, 7, 0 }, 399 { -1, 7, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 1, 2 }, { -7, 1, 2 }, { 1, 8, 0 }, 400 { -1, 8, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 3, 1 }, 401 { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 2 }, 402 { -8, 1, 2 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 9, 1, 2 }, 403 { -9, 1, 2 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 }, 404 }, 405 //level_add 406 { 0,10, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 407 1, //golomb_order 408 2, //inc_limit 409 11 //max_run 410 }, 411 { 412 { //level / run 413 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, 414 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 5, 1, 1 }, 415 { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 1, 3, 0 }, 416 { -1, 3, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 8, 1, 1 }, 417 { -8, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 9, 1, 1 }, 418 { -9, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 10, 1, 1 }, 419 {-10, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 2, 4, 0 }, 420 { -2, 4, 0 }, { 11, 1, 1 }, {-11, 1, 1 }, { 1, 6, 0 }, { -1, 6, 0 }, { 12, 1, 1 }, 421 {-12, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 6, 2, 1 }, { -6, 2, 1 }, { 13, 1, 1 }, 422 {-13, 1, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, 423 }, 424 //level_add 425 { 0, 14, 7, 4, 3, 3, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 426 1, //golomb_order 427 4, //inc_limit 428 8 //max_run 429 }, 430 { 431 { //level / run 432 { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, 433 { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 }, 434 { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 1, 2, 0 }, 435 { -1, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 }, 436 { -11, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 13, 1, 0 }, 437 { -13, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 1, 3, 0 }, 438 { -1, 3, 0 }, { 15, 1, 0 }, { -15, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 16, 1, 0 }, 439 { -16, 1, 0 }, { 17, 1, 0 }, { -17, 1, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 }, 440 { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 6, 2, 0 }, 441 { -6, 2, 0 }, { 19, 1, 0 }, { -19, 1, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, 442 }, 443 //level_add 444 { 0, 20, 7, 3, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 }, 445 0, //golomb_order 446 INT_MAX, //inc_limit 447 5, //max_run 448 } 449}; 450 451#undef EOB 452 453/***************************************************************************** 454 * 455 * motion vector prediction 456 * 457 ****************************************************************************/ 458 459static inline void store_mvs(AVSContext *h) 460{ 461 h->col_mv[h->mbidx * 4 + 0] = h->mv[MV_FWD_X0]; 462 h->col_mv[h->mbidx * 4 + 1] = h->mv[MV_FWD_X1]; 463 h->col_mv[h->mbidx * 4 + 2] = h->mv[MV_FWD_X2]; 464 h->col_mv[h->mbidx * 4 + 3] = h->mv[MV_FWD_X3]; 465} 466 467static inline void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw, 468 cavs_vector *col_mv) 469{ 470 cavs_vector *pmv_bw = pmv_fw + MV_BWD_OFFS; 471 unsigned den = h->direct_den[col_mv->ref]; 472 int m = FF_SIGNBIT(col_mv->x); 473 474 pmv_fw->dist = h->dist[1]; 475 pmv_bw->dist = h->dist[0]; 476 pmv_fw->ref = 1; 477 pmv_bw->ref = 0; 478 /* scale the co-located motion vector according to its temporal span */ 479 pmv_fw->x = (((den + (den * col_mv->x * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m; 480 pmv_bw->x = m - (((den + (den * col_mv->x * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m); 481 m = FF_SIGNBIT(col_mv->y); 482 pmv_fw->y = (((den + (den * col_mv->y * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m; 483 pmv_bw->y = m - (((den + (den * col_mv->y * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m); 484} 485 486static inline void mv_pred_sym(AVSContext *h, cavs_vector *src, 487 enum cavs_block size) 488{ 489 cavs_vector *dst = src + MV_BWD_OFFS; 490 491 /* backward mv is the scaled and negated forward mv */ 492 dst->x = -((src->x * h->sym_factor + 256) >> 9); 493 dst->y = -((src->y * h->sym_factor + 256) >> 9); 494 dst->ref = 0; 495 dst->dist = h->dist[0]; 496 set_mvs(dst, size); 497} 498 499/***************************************************************************** 500 * 501 * residual data decoding 502 * 503 ****************************************************************************/ 504 505/** kth-order exponential golomb code */ 506static inline int get_ue_code(GetBitContext *gb, int order) 507{ 508 unsigned ret = get_ue_golomb(gb); 509 if (ret >= ((1U<<31)>>order)) { 510 av_log(NULL, AV_LOG_ERROR, "get_ue_code: value too large\n"); 511 return AVERROR_INVALIDDATA; 512 } 513 if (order) { 514 return (ret<<order) + get_bits(gb, order); 515 } 516 return ret; 517} 518 519static inline int dequant(AVSContext *h, int16_t *level_buf, uint8_t *run_buf, 520 int16_t *dst, int mul, int shift, int coeff_num) 521{ 522 int round = 1 << (shift - 1); 523 int pos = -1; 524 const uint8_t *scantab = h->scantable.permutated; 525 526 /* inverse scan and dequantization */ 527 while (--coeff_num >= 0) { 528 pos += run_buf[coeff_num]; 529 if (pos > 63) { 530 av_log(h->avctx, AV_LOG_ERROR, 531 "position out of block bounds at pic %d MB(%d,%d)\n", 532 h->cur.poc, h->mbx, h->mby); 533 return AVERROR_INVALIDDATA; 534 } 535 dst[scantab[pos]] = (level_buf[coeff_num] * mul + round) >> shift; 536 } 537 return 0; 538} 539 540/** 541 * decode coefficients from one 8x8 block, dequantize, inverse transform 542 * and add them to sample block 543 * @param r pointer to 2D VLC table 544 * @param esc_golomb_order escape codes are k-golomb with this order k 545 * @param qp quantizer 546 * @param dst location of sample block 547 * @param stride line stride in frame buffer 548 */ 549static int decode_residual_block(AVSContext *h, GetBitContext *gb, 550 const struct dec_2dvlc *r, int esc_golomb_order, 551 int qp, uint8_t *dst, ptrdiff_t stride) 552{ 553 int i, esc_code, level, mask, ret; 554 unsigned int level_code, run; 555 int16_t level_buf[65]; 556 uint8_t run_buf[65]; 557 int16_t *block = h->block; 558 559 for (i = 0; i < 65; i++) { 560 level_code = get_ue_code(gb, r->golomb_order); 561 if (level_code >= ESCAPE_CODE) { 562 run = ((level_code - ESCAPE_CODE) >> 1) + 1; 563 if(run > 64) { 564 av_log(h->avctx, AV_LOG_ERROR, "run %d is too large\n", run); 565 return AVERROR_INVALIDDATA; 566 } 567 esc_code = get_ue_code(gb, esc_golomb_order); 568 if (esc_code < 0 || esc_code > 32767) { 569 av_log(h->avctx, AV_LOG_ERROR, "esc_code invalid\n"); 570 return AVERROR_INVALIDDATA; 571 } 572 573 level = esc_code + (run > r->max_run ? 1 : r->level_add[run]); 574 while (level > r->inc_limit) 575 r++; 576 mask = -(level_code & 1); 577 level = (level ^ mask) - mask; 578 } else { 579 level = r->rltab[level_code][0]; 580 if (!level) //end of block signal 581 break; 582 run = r->rltab[level_code][1]; 583 r += r->rltab[level_code][2]; 584 } 585 level_buf[i] = level; 586 run_buf[i] = run; 587 } 588 if ((ret = dequant(h, level_buf, run_buf, block, dequant_mul[qp], 589 dequant_shift[qp], i)) < 0) 590 return ret; 591 h->cdsp.cavs_idct8_add(dst, block, stride); 592 h->bdsp.clear_block(block); 593 return 0; 594} 595 596 597static inline int decode_residual_chroma(AVSContext *h) 598{ 599 if (h->cbp & (1 << 4)) { 600 int ret = decode_residual_block(h, &h->gb, chroma_dec, 0, 601 ff_cavs_chroma_qp[h->qp], h->cu, h->c_stride); 602 if (ret < 0) 603 return ret; 604 } 605 if (h->cbp & (1 << 5)) { 606 int ret = decode_residual_block(h, &h->gb, chroma_dec, 0, 607 ff_cavs_chroma_qp[h->qp], h->cv, h->c_stride); 608 if (ret < 0) 609 return ret; 610 } 611 return 0; 612} 613 614static inline int decode_residual_inter(AVSContext *h) 615{ 616 int block; 617 618 /* get coded block pattern */ 619 int cbp = get_ue_golomb(&h->gb); 620 if (cbp > 63U) { 621 av_log(h->avctx, AV_LOG_ERROR, "illegal inter cbp %d\n", cbp); 622 return AVERROR_INVALIDDATA; 623 } 624 h->cbp = cbp_tab[cbp][1]; 625 626 /* get quantizer */ 627 if (h->cbp && !h->qp_fixed) 628 h->qp = (h->qp + (unsigned)get_se_golomb(&h->gb)) & 63; 629 for (block = 0; block < 4; block++) 630 if (h->cbp & (1 << block)) 631 decode_residual_block(h, &h->gb, inter_dec, 0, h->qp, 632 h->cy + h->luma_scan[block], h->l_stride); 633 decode_residual_chroma(h); 634 635 return 0; 636} 637 638/***************************************************************************** 639 * 640 * macroblock level 641 * 642 ****************************************************************************/ 643 644static inline void set_mv_intra(AVSContext *h) 645{ 646 h->mv[MV_FWD_X0] = ff_cavs_intra_mv; 647 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16); 648 h->mv[MV_BWD_X0] = ff_cavs_intra_mv; 649 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16); 650 if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) 651 h->col_type_base[h->mbidx] = I_8X8; 652} 653 654static int decode_mb_i(AVSContext *h, int cbp_code) 655{ 656 GetBitContext *gb = &h->gb; 657 unsigned pred_mode_uv; 658 int block; 659 uint8_t top[18]; 660 uint8_t *left = NULL; 661 uint8_t *d; 662 int ret; 663 664 ff_cavs_init_mb(h); 665 666 /* get intra prediction modes from stream */ 667 for (block = 0; block < 4; block++) { 668 int nA, nB, predpred; 669 int pos = scan3x3[block]; 670 671 nA = h->pred_mode_Y[pos - 1]; 672 nB = h->pred_mode_Y[pos - 3]; 673 predpred = FFMIN(nA, nB); 674 if (predpred == NOT_AVAIL) // if either is not available 675 predpred = INTRA_L_LP; 676 if (!get_bits1(gb)) { 677 int rem_mode = get_bits(gb, 2); 678 predpred = rem_mode + (rem_mode >= predpred); 679 } 680 h->pred_mode_Y[pos] = predpred; 681 } 682 pred_mode_uv = get_ue_golomb_31(gb); 683 if (pred_mode_uv > 6) { 684 av_log(h->avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n"); 685 return AVERROR_INVALIDDATA; 686 } 687 ff_cavs_modify_mb_i(h, &pred_mode_uv); 688 689 /* get coded block pattern */ 690 if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) 691 cbp_code = get_ue_golomb(gb); 692 if (cbp_code > 63U) { 693 av_log(h->avctx, AV_LOG_ERROR, "illegal intra cbp\n"); 694 return AVERROR_INVALIDDATA; 695 } 696 h->cbp = cbp_tab[cbp_code][0]; 697 if (h->cbp && !h->qp_fixed) 698 h->qp = (h->qp + (unsigned)get_se_golomb(gb)) & 63; //qp_delta 699 700 /* luma intra prediction interleaved with residual decode/transform/add */ 701 for (block = 0; block < 4; block++) { 702 d = h->cy + h->luma_scan[block]; 703 ff_cavs_load_intra_pred_luma(h, top, &left, block); 704 h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]] 705 (d, top, left, h->l_stride); 706 if (h->cbp & (1<<block)) { 707 ret = decode_residual_block(h, gb, intra_dec, 1, h->qp, d, h->l_stride); 708 if (ret < 0) 709 return ret; 710 } 711 } 712 713 /* chroma intra prediction */ 714 ff_cavs_load_intra_pred_chroma(h); 715 h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx * 10], 716 h->left_border_u, h->c_stride); 717 h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx * 10], 718 h->left_border_v, h->c_stride); 719 720 ret = decode_residual_chroma(h); 721 if (ret < 0) 722 return ret; 723 ff_cavs_filter(h, I_8X8); 724 set_mv_intra(h); 725 return 0; 726} 727 728static inline void set_intra_mode_default(AVSContext *h) 729{ 730 if (h->stream_revision > 0) { 731 h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL; 732 h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = NOT_AVAIL; 733 } else { 734 h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP; 735 h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = INTRA_L_LP; 736 } 737} 738 739static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type) 740{ 741 GetBitContext *gb = &h->gb; 742 int ref[4]; 743 744 ff_cavs_init_mb(h); 745 switch (mb_type) { 746 case P_SKIP: 747 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0); 748 break; 749 case P_16X16: 750 ref[0] = h->ref_flag ? 0 : get_bits1(gb); 751 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, ref[0]); 752 break; 753 case P_16X8: 754 ref[0] = h->ref_flag ? 0 : get_bits1(gb); 755 ref[2] = h->ref_flag ? 0 : get_bits1(gb); 756 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, ref[0]); 757 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, ref[2]); 758 break; 759 case P_8X16: 760 ref[0] = h->ref_flag ? 0 : get_bits1(gb); 761 ref[1] = h->ref_flag ? 0 : get_bits1(gb); 762 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, ref[0]); 763 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, ref[1]); 764 break; 765 case P_8X8: 766 ref[0] = h->ref_flag ? 0 : get_bits1(gb); 767 ref[1] = h->ref_flag ? 0 : get_bits1(gb); 768 ref[2] = h->ref_flag ? 0 : get_bits1(gb); 769 ref[3] = h->ref_flag ? 0 : get_bits1(gb); 770 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN, BLK_8X8, ref[0]); 771 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN, BLK_8X8, ref[1]); 772 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN, BLK_8X8, ref[2]); 773 ff_cavs_mv(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN, BLK_8X8, ref[3]); 774 } 775 ff_cavs_inter(h, mb_type); 776 set_intra_mode_default(h); 777 store_mvs(h); 778 if (mb_type != P_SKIP) 779 decode_residual_inter(h); 780 ff_cavs_filter(h, mb_type); 781 h->col_type_base[h->mbidx] = mb_type; 782} 783 784static int decode_mb_b(AVSContext *h, enum cavs_mb mb_type) 785{ 786 int block; 787 enum cavs_sub_mb sub_type[4]; 788 int flags; 789 790 ff_cavs_init_mb(h); 791 792 /* reset all MVs */ 793 h->mv[MV_FWD_X0] = ff_cavs_dir_mv; 794 set_mvs(&h->mv[MV_FWD_X0], BLK_16X16); 795 h->mv[MV_BWD_X0] = ff_cavs_dir_mv; 796 set_mvs(&h->mv[MV_BWD_X0], BLK_16X16); 797 switch (mb_type) { 798 case B_SKIP: 799 case B_DIRECT: 800 if (!h->col_type_base[h->mbidx]) { 801 /* intra MB at co-location, do in-plane prediction */ 802 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1); 803 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0); 804 } else 805 /* direct prediction from co-located P MB, block-wise */ 806 for (block = 0; block < 4; block++) 807 mv_pred_direct(h, &h->mv[mv_scan[block]], 808 &h->col_mv[h->mbidx * 4 + block]); 809 break; 810 case B_FWD_16X16: 811 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1); 812 break; 813 case B_SYM_16X16: 814 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1); 815 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16); 816 break; 817 case B_BWD_16X16: 818 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0); 819 break; 820 case B_8X8: 821#define TMP_UNUSED_INX 7 822 flags = 0; 823 for (block = 0; block < 4; block++) 824 sub_type[block] = get_bits(&h->gb, 2); 825 for (block = 0; block < 4; block++) { 826 switch (sub_type[block]) { 827 case B_SUB_DIRECT: 828 if (!h->col_type_base[h->mbidx]) { 829 /* intra MB at co-location, do in-plane prediction */ 830 if(flags==0) { 831 // if col-MB is a Intra MB, current Block size is 16x16. 832 // AVS standard section 9.9.1 833 if(block>0){ 834 h->mv[TMP_UNUSED_INX ] = h->mv[MV_FWD_X0 ]; 835 h->mv[TMP_UNUSED_INX + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS]; 836 } 837 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, 838 MV_PRED_BSKIP, BLK_8X8, 1); 839 ff_cavs_mv(h, MV_FWD_X0+MV_BWD_OFFS, 840 MV_FWD_C2+MV_BWD_OFFS, 841 MV_PRED_BSKIP, BLK_8X8, 0); 842 if(block>0) { 843 flags = mv_scan[block]; 844 h->mv[flags ] = h->mv[MV_FWD_X0 ]; 845 h->mv[flags + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS]; 846 h->mv[MV_FWD_X0 ] = h->mv[TMP_UNUSED_INX ]; 847 h->mv[MV_FWD_X0 + MV_BWD_OFFS] = h->mv[TMP_UNUSED_INX + MV_BWD_OFFS]; 848 } else 849 flags = MV_FWD_X0; 850 } else { 851 h->mv[mv_scan[block] ] = h->mv[flags ]; 852 h->mv[mv_scan[block] + MV_BWD_OFFS] = h->mv[flags + MV_BWD_OFFS]; 853 } 854 } else 855 mv_pred_direct(h, &h->mv[mv_scan[block]], 856 &h->col_mv[h->mbidx * 4 + block]); 857 break; 858 case B_SUB_FWD: 859 ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3, 860 MV_PRED_MEDIAN, BLK_8X8, 1); 861 break; 862 case B_SUB_SYM: 863 ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3, 864 MV_PRED_MEDIAN, BLK_8X8, 1); 865 mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8); 866 break; 867 } 868 } 869#undef TMP_UNUSED_INX 870 for (block = 0; block < 4; block++) { 871 if (sub_type[block] == B_SUB_BWD) 872 ff_cavs_mv(h, mv_scan[block] + MV_BWD_OFFS, 873 mv_scan[block] + MV_BWD_OFFS - 3, 874 MV_PRED_MEDIAN, BLK_8X8, 0); 875 } 876 break; 877 default: 878 if (mb_type <= B_SYM_16X16) { 879 av_log(h->avctx, AV_LOG_ERROR, "Invalid mb_type %d in B frame\n", mb_type); 880 return AVERROR_INVALIDDATA; 881 } 882 av_assert2(mb_type < B_8X8); 883 flags = ff_cavs_partition_flags[mb_type]; 884 if (mb_type & 1) { /* 16x8 macroblock types */ 885 if (flags & FWD0) 886 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, 1); 887 if (flags & SYM0) 888 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8); 889 if (flags & FWD1) 890 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1); 891 if (flags & SYM1) 892 mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8); 893 if (flags & BWD0) 894 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP, BLK_16X8, 0); 895 if (flags & BWD1) 896 ff_cavs_mv(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0); 897 } else { /* 8x16 macroblock types */ 898 if (flags & FWD0) 899 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1); 900 if (flags & SYM0) 901 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16); 902 if (flags & FWD1) 903 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 1); 904 if (flags & SYM1) 905 mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16); 906 if (flags & BWD0) 907 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0); 908 if (flags & BWD1) 909 ff_cavs_mv(h, MV_BWD_X1, MV_BWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 0); 910 } 911 } 912 ff_cavs_inter(h, mb_type); 913 set_intra_mode_default(h); 914 if (mb_type != B_SKIP) 915 decode_residual_inter(h); 916 ff_cavs_filter(h, mb_type); 917 918 return 0; 919} 920 921/***************************************************************************** 922 * 923 * slice level 924 * 925 ****************************************************************************/ 926 927static inline int decode_slice_header(AVSContext *h, GetBitContext *gb) 928{ 929 if (h->stc > 0xAF) 930 av_log(h->avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc); 931 932 if (h->stc >= h->mb_height) { 933 av_log(h->avctx, AV_LOG_ERROR, "stc 0x%02x is too large\n", h->stc); 934 return AVERROR_INVALIDDATA; 935 } 936 937 h->mby = h->stc; 938 h->mbidx = h->mby * h->mb_width; 939 940 /* mark top macroblocks as unavailable */ 941 h->flags &= ~(B_AVAIL | C_AVAIL); 942 if (!h->pic_qp_fixed) { 943 h->qp_fixed = get_bits1(gb); 944 h->qp = get_bits(gb, 6); 945 } 946 /* inter frame or second slice can have weighting params */ 947 if ((h->cur.f->pict_type != AV_PICTURE_TYPE_I) || 948 (!h->pic_structure && h->mby >= h->mb_width / 2)) 949 if (get_bits1(gb)) { //slice_weighting_flag 950 av_log(h->avctx, AV_LOG_ERROR, 951 "weighted prediction not yet supported\n"); 952 } 953 return 0; 954} 955 956static inline int check_for_slice(AVSContext *h) 957{ 958 GetBitContext *gb = &h->gb; 959 int align; 960 961 if (h->mbx) 962 return 0; 963 align = (-get_bits_count(gb)) & 7; 964 /* check for stuffing byte */ 965 if (!align && (show_bits(gb, 8) == 0x80)) 966 align = 8; 967 if ((show_bits_long(gb, 24 + align) & 0xFFFFFF) == 0x000001) { 968 skip_bits_long(gb, 24 + align); 969 h->stc = get_bits(gb, 8); 970 if (h->stc >= h->mb_height) 971 return 0; 972 decode_slice_header(h, gb); 973 return 1; 974 } 975 return 0; 976} 977 978/***************************************************************************** 979 * 980 * frame level 981 * 982 ****************************************************************************/ 983 984static int decode_pic(AVSContext *h) 985{ 986 int ret; 987 int skip_count = -1; 988 enum cavs_mb mb_type; 989 990 if (!h->top_qp) { 991 av_log(h->avctx, AV_LOG_ERROR, "No sequence header decoded yet\n"); 992 return AVERROR_INVALIDDATA; 993 } 994 995 av_frame_unref(h->cur.f); 996 997 skip_bits(&h->gb, 16);//bbv_dwlay 998 if (h->stc == PIC_PB_START_CODE) { 999 h->cur.f->pict_type = get_bits(&h->gb, 2) + AV_PICTURE_TYPE_I; 1000 if (h->cur.f->pict_type > AV_PICTURE_TYPE_B) { 1001 av_log(h->avctx, AV_LOG_ERROR, "illegal picture type\n"); 1002 return AVERROR_INVALIDDATA; 1003 } 1004 /* make sure we have the reference frames we need */ 1005 if (!h->DPB[0].f->data[0] || 1006 (!h->DPB[1].f->data[0] && h->cur.f->pict_type == AV_PICTURE_TYPE_B)) 1007 return AVERROR_INVALIDDATA; 1008 } else { 1009 h->cur.f->pict_type = AV_PICTURE_TYPE_I; 1010 if (get_bits1(&h->gb)) 1011 skip_bits(&h->gb, 24);//time_code 1012 /* old sample clips were all progressive and no low_delay, 1013 bump stream revision if detected otherwise */ 1014 if (h->low_delay || !(show_bits(&h->gb, 9) & 1)) 1015 h->stream_revision = 1; 1016 /* similarly test top_field_first and repeat_first_field */ 1017 else if (show_bits(&h->gb, 11) & 3) 1018 h->stream_revision = 1; 1019 if (h->stream_revision > 0) 1020 skip_bits(&h->gb, 1); //marker_bit 1021 } 1022 1023 ret = ff_get_buffer(h->avctx, h->cur.f, h->cur.f->pict_type == AV_PICTURE_TYPE_B ? 1024 0 : AV_GET_BUFFER_FLAG_REF); 1025 if (ret < 0) 1026 return ret; 1027 1028 if (!h->edge_emu_buffer) { 1029 int alloc_size = FFALIGN(FFABS(h->cur.f->linesize[0]) + 32, 32); 1030 h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 24); 1031 if (!h->edge_emu_buffer) 1032 return AVERROR(ENOMEM); 1033 } 1034 1035 if ((ret = ff_cavs_init_pic(h)) < 0) 1036 return ret; 1037 h->cur.poc = get_bits(&h->gb, 8) * 2; 1038 1039 /* get temporal distances and MV scaling factors */ 1040 if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) { 1041 h->dist[0] = (h->cur.poc - h->DPB[0].poc) & 511; 1042 } else { 1043 h->dist[0] = (h->DPB[0].poc - h->cur.poc) & 511; 1044 } 1045 h->dist[1] = (h->cur.poc - h->DPB[1].poc) & 511; 1046 h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0; 1047 h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0; 1048 if (h->cur.f->pict_type == AV_PICTURE_TYPE_B) { 1049 h->sym_factor = h->dist[0] * h->scale_den[1]; 1050 if (FFABS(h->sym_factor) > 32768) { 1051 av_log(h->avctx, AV_LOG_ERROR, "sym_factor %d too large\n", h->sym_factor); 1052 return AVERROR_INVALIDDATA; 1053 } 1054 } else { 1055 h->direct_den[0] = h->dist[0] ? 16384 / h->dist[0] : 0; 1056 h->direct_den[1] = h->dist[1] ? 16384 / h->dist[1] : 0; 1057 } 1058 1059 if (h->low_delay) 1060 get_ue_golomb(&h->gb); //bbv_check_times 1061 h->progressive = get_bits1(&h->gb); 1062 h->pic_structure = 1; 1063 if (!h->progressive) 1064 h->pic_structure = get_bits1(&h->gb); 1065 if (!h->pic_structure && h->stc == PIC_PB_START_CODE) 1066 skip_bits1(&h->gb); //advanced_pred_mode_disable 1067 skip_bits1(&h->gb); //top_field_first 1068 skip_bits1(&h->gb); //repeat_first_field 1069 h->pic_qp_fixed = 1070 h->qp_fixed = get_bits1(&h->gb); 1071 h->qp = get_bits(&h->gb, 6); 1072 if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) { 1073 if (!h->progressive && !h->pic_structure) 1074 skip_bits1(&h->gb);//what is this? 1075 skip_bits(&h->gb, 4); //reserved bits 1076 } else { 1077 if (!(h->cur.f->pict_type == AV_PICTURE_TYPE_B && h->pic_structure == 1)) 1078 h->ref_flag = get_bits1(&h->gb); 1079 skip_bits(&h->gb, 4); //reserved bits 1080 h->skip_mode_flag = get_bits1(&h->gb); 1081 } 1082 h->loop_filter_disable = get_bits1(&h->gb); 1083 if (!h->loop_filter_disable && get_bits1(&h->gb)) { 1084 h->alpha_offset = get_se_golomb(&h->gb); 1085 h->beta_offset = get_se_golomb(&h->gb); 1086 if ( h->alpha_offset < -64 || h->alpha_offset > 64 1087 || h-> beta_offset < -64 || h-> beta_offset > 64) { 1088 h->alpha_offset = h->beta_offset = 0; 1089 return AVERROR_INVALIDDATA; 1090 } 1091 } else { 1092 h->alpha_offset = h->beta_offset = 0; 1093 } 1094 1095 ret = 0; 1096 if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) { 1097 do { 1098 check_for_slice(h); 1099 ret = decode_mb_i(h, 0); 1100 if (ret < 0) 1101 break; 1102 } while (ff_cavs_next_mb(h)); 1103 } else if (h->cur.f->pict_type == AV_PICTURE_TYPE_P) { 1104 do { 1105 if (check_for_slice(h)) 1106 skip_count = -1; 1107 if (h->skip_mode_flag && (skip_count < 0)) { 1108 if (get_bits_left(&h->gb) < 1) { 1109 ret = AVERROR_INVALIDDATA; 1110 break; 1111 } 1112 skip_count = get_ue_golomb(&h->gb); 1113 } 1114 if (h->skip_mode_flag && skip_count--) { 1115 decode_mb_p(h, P_SKIP); 1116 } else { 1117 if (get_bits_left(&h->gb) < 1) { 1118 ret = AVERROR_INVALIDDATA; 1119 break; 1120 } 1121 mb_type = get_ue_golomb(&h->gb) + P_SKIP + h->skip_mode_flag; 1122 if (mb_type > P_8X8) 1123 ret = decode_mb_i(h, mb_type - P_8X8 - 1); 1124 else 1125 decode_mb_p(h, mb_type); 1126 } 1127 if (ret < 0) 1128 break; 1129 } while (ff_cavs_next_mb(h)); 1130 } else { /* AV_PICTURE_TYPE_B */ 1131 do { 1132 if (check_for_slice(h)) 1133 skip_count = -1; 1134 if (h->skip_mode_flag && (skip_count < 0)) { 1135 if (get_bits_left(&h->gb) < 1) { 1136 ret = AVERROR_INVALIDDATA; 1137 break; 1138 } 1139 skip_count = get_ue_golomb(&h->gb); 1140 } 1141 if (h->skip_mode_flag && skip_count--) { 1142 ret = decode_mb_b(h, B_SKIP); 1143 } else { 1144 if (get_bits_left(&h->gb) < 1) { 1145 ret = AVERROR_INVALIDDATA; 1146 break; 1147 } 1148 mb_type = get_ue_golomb(&h->gb) + B_SKIP + h->skip_mode_flag; 1149 if (mb_type > B_8X8) 1150 ret = decode_mb_i(h, mb_type - B_8X8 - 1); 1151 else 1152 ret = decode_mb_b(h, mb_type); 1153 } 1154 if (ret < 0) 1155 break; 1156 } while (ff_cavs_next_mb(h)); 1157 } 1158 emms_c(); 1159 if (ret >= 0 && h->cur.f->pict_type != AV_PICTURE_TYPE_B) { 1160 av_frame_unref(h->DPB[1].f); 1161 FFSWAP(AVSFrame, h->cur, h->DPB[1]); 1162 FFSWAP(AVSFrame, h->DPB[0], h->DPB[1]); 1163 } 1164 return ret; 1165} 1166 1167/***************************************************************************** 1168 * 1169 * headers and interface 1170 * 1171 ****************************************************************************/ 1172 1173static int decode_seq_header(AVSContext *h) 1174{ 1175 int frame_rate_code; 1176 int width, height; 1177 int ret; 1178 1179 h->profile = get_bits(&h->gb, 8); 1180 if (h->profile != 0x20) { 1181 avpriv_report_missing_feature(h->avctx, 1182 "only supprt JiZhun profile"); 1183 return AVERROR_PATCHWELCOME; 1184 } 1185 h->level = get_bits(&h->gb, 8); 1186 skip_bits1(&h->gb); //progressive sequence 1187 1188 width = get_bits(&h->gb, 14); 1189 height = get_bits(&h->gb, 14); 1190 if ((h->width || h->height) && (h->width != width || h->height != height)) { 1191 avpriv_report_missing_feature(h->avctx, 1192 "Width/height changing in CAVS"); 1193 return AVERROR_PATCHWELCOME; 1194 } 1195 if (width <= 0 || height <= 0) { 1196 av_log(h->avctx, AV_LOG_ERROR, "Dimensions invalid\n"); 1197 return AVERROR_INVALIDDATA; 1198 } 1199 skip_bits(&h->gb, 2); //chroma format 1200 skip_bits(&h->gb, 3); //sample_precision 1201 h->aspect_ratio = get_bits(&h->gb, 4); 1202 frame_rate_code = get_bits(&h->gb, 4); 1203 if (frame_rate_code == 0 || frame_rate_code > 13) { 1204 av_log(h->avctx, AV_LOG_WARNING, 1205 "frame_rate_code %d is invalid\n", frame_rate_code); 1206 frame_rate_code = 1; 1207 } 1208 1209 skip_bits(&h->gb, 18); //bit_rate_lower 1210 skip_bits1(&h->gb); //marker_bit 1211 skip_bits(&h->gb, 12); //bit_rate_upper 1212 h->low_delay = get_bits1(&h->gb); 1213 1214 ret = ff_set_dimensions(h->avctx, width, height); 1215 if (ret < 0) 1216 return ret; 1217 1218 h->width = width; 1219 h->height = height; 1220 h->mb_width = (h->width + 15) >> 4; 1221 h->mb_height = (h->height + 15) >> 4; 1222 h->avctx->framerate = ff_mpeg12_frame_rate_tab[frame_rate_code]; 1223 if (!h->top_qp) 1224 return ff_cavs_init_top_lines(h); 1225 return 0; 1226} 1227 1228static void cavs_flush(AVCodecContext * avctx) 1229{ 1230 AVSContext *h = avctx->priv_data; 1231 h->got_keyframe = 0; 1232} 1233 1234static int cavs_decode_frame(AVCodecContext *avctx, AVFrame *rframe, 1235 int *got_frame, AVPacket *avpkt) 1236{ 1237 AVSContext *h = avctx->priv_data; 1238 const uint8_t *buf = avpkt->data; 1239 int buf_size = avpkt->size; 1240 uint32_t stc = -1; 1241 int input_size, ret; 1242 const uint8_t *buf_end; 1243 const uint8_t *buf_ptr; 1244 int frame_start = 0; 1245 1246 if (buf_size == 0) { 1247 if (!h->low_delay && h->DPB[0].f->data[0]) { 1248 *got_frame = 1; 1249 av_frame_move_ref(rframe, h->DPB[0].f); 1250 } 1251 return 0; 1252 } 1253 1254 h->stc = 0; 1255 1256 buf_ptr = buf; 1257 buf_end = buf + buf_size; 1258 for(;;) { 1259 buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &stc); 1260 if ((stc & 0xFFFFFE00) || buf_ptr == buf_end) { 1261 if (!h->stc) 1262 av_log(h->avctx, AV_LOG_WARNING, "no frame decoded\n"); 1263 return FFMAX(0, buf_ptr - buf); 1264 } 1265 input_size = (buf_end - buf_ptr) * 8; 1266 switch (stc) { 1267 case CAVS_START_CODE: 1268 init_get_bits(&h->gb, buf_ptr, input_size); 1269 decode_seq_header(h); 1270 break; 1271 case PIC_I_START_CODE: 1272 if (!h->got_keyframe) { 1273 av_frame_unref(h->DPB[0].f); 1274 av_frame_unref(h->DPB[1].f); 1275 h->got_keyframe = 1; 1276 } 1277 case PIC_PB_START_CODE: 1278 if (frame_start > 1) 1279 return AVERROR_INVALIDDATA; 1280 frame_start ++; 1281 if (*got_frame) 1282 av_frame_unref(rframe); 1283 *got_frame = 0; 1284 if (!h->got_keyframe) 1285 break; 1286 init_get_bits(&h->gb, buf_ptr, input_size); 1287 h->stc = stc; 1288 if (decode_pic(h)) 1289 break; 1290 *got_frame = 1; 1291 if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) { 1292 if (h->DPB[!h->low_delay].f->data[0]) { 1293 if ((ret = av_frame_ref(rframe, h->DPB[!h->low_delay].f)) < 0) 1294 return ret; 1295 } else { 1296 *got_frame = 0; 1297 } 1298 } else { 1299 av_frame_move_ref(rframe, h->cur.f); 1300 } 1301 break; 1302 case EXT_START_CODE: 1303 //mpeg_decode_extension(avctx, buf_ptr, input_size); 1304 break; 1305 case USER_START_CODE: 1306 //mpeg_decode_user_data(avctx, buf_ptr, input_size); 1307 break; 1308 default: 1309 if (stc <= SLICE_MAX_START_CODE) { 1310 init_get_bits(&h->gb, buf_ptr, input_size); 1311 decode_slice_header(h, &h->gb); 1312 } 1313 break; 1314 } 1315 } 1316} 1317 1318const FFCodec ff_cavs_decoder = { 1319 .p.name = "cavs", 1320 .p.long_name = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"), 1321 .p.type = AVMEDIA_TYPE_VIDEO, 1322 .p.id = AV_CODEC_ID_CAVS, 1323 .priv_data_size = sizeof(AVSContext), 1324 .init = ff_cavs_init, 1325 .close = ff_cavs_end, 1326 FF_CODEC_DECODE_CB(cavs_decode_frame), 1327 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY, 1328 .flush = cavs_flush, 1329 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP, 1330}; 1331