| 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 "internal.h" |
| 34 | #include "mpeg12data.h" |
| 35 | #include "mpegvideo.h" |
| 36 | |
| 37 | static const uint8_t mv_scan[4] = { |
| 38 | MV_FWD_X0, MV_FWD_X1, |
| 39 | MV_FWD_X2, MV_FWD_X3 |
| 40 | }; |
| 41 | |
| 42 | static const uint8_t cbp_tab[64][2] = { |
| 43 | { 63, 0 }, { 15, 15 }, { 31, 63 }, { 47, 31 }, { 0, 16 }, { 14, 32 }, { 13, 47 }, { 11, 13 }, |
| 44 | { 7, 14 }, { 5, 11 }, { 10, 12 }, { 8, 5 }, { 12, 10 }, { 61, 7 }, { 4, 48 }, { 55, 3 }, |
| 45 | { 1, 2 }, { 2, 8 }, { 59, 4 }, { 3, 1 }, { 62, 61 }, { 9, 55 }, { 6, 59 }, { 29, 62 }, |
| 46 | { 45, 29 }, { 51, 27 }, { 23, 23 }, { 39, 19 }, { 27, 30 }, { 46, 28 }, { 53, 9 }, { 30, 6 }, |
| 47 | { 43, 60 }, { 37, 21 }, { 60, 44 }, { 16, 26 }, { 21, 51 }, { 28, 35 }, { 19, 18 }, { 35, 20 }, |
| 48 | { 42, 24 }, { 26, 53 }, { 44, 17 }, { 32, 37 }, { 58, 39 }, { 24, 45 }, { 20, 58 }, { 17, 43 }, |
| 49 | { 18, 42 }, { 48, 46 }, { 22, 36 }, { 33, 33 }, { 25, 34 }, { 49, 40 }, { 40, 52 }, { 36, 49 }, |
| 50 | { 34, 50 }, { 50, 56 }, { 52, 25 }, { 54, 22 }, { 41, 54 }, { 56, 57 }, { 38, 41 }, { 57, 38 } |
| 51 | }; |
| 52 | |
| 53 | static const uint8_t scan3x3[4] = { 4, 5, 7, 8 }; |
| 54 | |
| 55 | static const uint8_t dequant_shift[64] = { |
| 56 | 14, 14, 14, 14, 14, 14, 14, 14, |
| 57 | 13, 13, 13, 13, 13, 13, 13, 13, |
| 58 | 13, 12, 12, 12, 12, 12, 12, 12, |
| 59 | 11, 11, 11, 11, 11, 11, 11, 11, |
| 60 | 11, 10, 10, 10, 10, 10, 10, 10, |
| 61 | 10, 9, 9, 9, 9, 9, 9, 9, |
| 62 | 9, 8, 8, 8, 8, 8, 8, 8, |
| 63 | 7, 7, 7, 7, 7, 7, 7, 7 |
| 64 | }; |
| 65 | |
| 66 | static const uint16_t dequant_mul[64] = { |
| 67 | 32768, 36061, 38968, 42495, 46341, 50535, 55437, 60424, |
| 68 | 32932, 35734, 38968, 42495, 46177, 50535, 55109, 59933, |
| 69 | 65535, 35734, 38968, 42577, 46341, 50617, 55027, 60097, |
| 70 | 32809, 35734, 38968, 42454, 46382, 50576, 55109, 60056, |
| 71 | 65535, 35734, 38968, 42495, 46320, 50515, 55109, 60076, |
| 72 | 65535, 35744, 38968, 42495, 46341, 50535, 55099, 60087, |
| 73 | 65535, 35734, 38973, 42500, 46341, 50535, 55109, 60097, |
| 74 | 32771, 35734, 38965, 42497, 46341, 50535, 55109, 60099 |
| 75 | }; |
| 76 | |
| 77 | #define EOB 0, 0, 0 |
| 78 | |
| 79 | static const struct dec_2dvlc intra_dec[7] = { |
| 80 | { |
| 81 | { //level / run / table_inc |
| 82 | { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 }, |
| 83 | { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 }, |
| 84 | { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 }, |
| 85 | { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, |
| 86 | { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 }, |
| 87 | { 1, 15, 1 }, { -1, 15, 1 }, { 2, 2, 2 }, { -2, 2, 2 }, { 1, 16, 1 }, { -1, 16, 1 }, |
| 88 | { 1, 17, 1 }, { -1, 17, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 18, 1 }, { -1, 18, 1 }, |
| 89 | { 1, 19, 1 }, { -1, 19, 1 }, { 2, 3, 2 }, { -2, 3, 2 }, { 1, 20, 1 }, { -1, 20, 1 }, |
| 90 | { 1, 21, 1 }, { -1, 21, 1 }, { 2, 4, 2 }, { -2, 4, 2 }, { 1, 22, 1 }, { -1, 22, 1 }, |
| 91 | { 2, 5, 2 }, { -2, 5, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { EOB } |
| 92 | }, |
| 93 | //level_add |
| 94 | { 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 }, |
| 95 | 2, //golomb_order |
| 96 | 0, //inc_limit |
| 97 | 23, //max_run |
| 98 | }, |
| 99 | { |
| 100 | { //level / run |
| 101 | { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 }, { -2, 1, 1 }, |
| 102 | { 1, 3, 0 }, { -1, 3, 0 }, { EOB }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 }, |
| 103 | { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 2, 2, 1 }, |
| 104 | { -2, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 1, 9, 0 }, |
| 105 | { -1, 9, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 4, 1, 2 }, { -4, 1, 2 }, { 1, 10, 0 }, |
| 106 | { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 3, 2, 2 }, |
| 107 | { -3, 2, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 5, 1, 3 }, |
| 108 | { -5, 1, 3 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 14, 0 }, |
| 109 | { -1, 14, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 2, 8, 1 }, { -2, 8, 1 }, { 3, 3, 2 }, |
| 110 | { -3, 3, 2 }, { 6, 1, 3 }, { -6, 1, 3 }, { 1, 15, 0 }, { -1, 15, 0 } |
| 111 | }, |
| 112 | //level_add |
| 113 | { 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 }, |
| 114 | 2, //golomb_order |
| 115 | 1, //inc_limit |
| 116 | 15, //max_run |
| 117 | }, |
| 118 | { |
| 119 | { //level / run |
| 120 | { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, |
| 121 | { 3, 1, 1 }, { -3, 1, 1 }, { EOB }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 }, |
| 122 | { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 }, |
| 123 | { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 }, |
| 124 | { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 2, 4, 0 }, |
| 125 | { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 }, |
| 126 | { -7, 1, 2 }, { 3, 3, 1 }, { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 }, |
| 127 | { -1, 8, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 3 }, { -8, 1, 3 }, { 1, 9, 0 }, |
| 128 | { -1, 9, 0 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 }, { 2, 7, 0 }, |
| 129 | { -2, 7, 0 }, { 9, 1, 3 }, { -9, 1, 3 }, { 1, 10, 0 }, { -1, 10, 0 } |
| 130 | }, |
| 131 | //level_add |
| 132 | { 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 }, |
| 133 | 2, //golomb_order |
| 134 | 2, //inc_limit |
| 135 | 10, //max_run |
| 136 | }, |
| 137 | { |
| 138 | { //level / run |
| 139 | { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, |
| 140 | { 1, 2, 0 }, { -1, 2, 0 }, { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 1 }, |
| 141 | { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 1 }, |
| 142 | { -6, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 }, |
| 143 | { -1, 4, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 }, |
| 144 | { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 5, 2, 1 }, |
| 145 | { -5, 2, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 10, 1, 2 }, {-10, 1, 2 }, { 3, 3, 0 }, |
| 146 | { -3, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 11, 1, 3 }, {-11, 1, 3 }, { 6, 2, 1 }, |
| 147 | { -6, 2, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 5, 0 }, { -2, 5, 0 }, { 3, 4, 0 }, |
| 148 | { -3, 4, 0 }, { 12, 1, 3 }, {-12, 1, 3 }, { 4, 3, 0 }, { -4, 3, 0 } |
| 149 | }, |
| 150 | //level_add |
| 151 | { 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 }, |
| 152 | 2, //golomb_order |
| 153 | 4, //inc_limit |
| 154 | 7, //max_run |
| 155 | }, |
| 156 | { |
| 157 | { //level / run |
| 158 | { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, |
| 159 | { EOB }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 }, |
| 160 | { -6, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 1 }, |
| 161 | { -8, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 10, 1, 1 }, |
| 162 | {-10, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 2 }, |
| 163 | {-11, 1, 2 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 13, 1, 2 }, |
| 164 | {-13, 1, 2 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 }, |
| 165 | { -2, 3, 0 }, { 14, 1, 2 }, {-14, 1, 2 }, { 6, 2, 0 }, { -6, 2, 0 }, { 15, 1, 2 }, |
| 166 | {-15, 1, 2 }, { 16, 1, 2 }, {-16, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 5, 0 }, |
| 167 | { -1, 5, 0 }, { 7, 2, 0 }, { -7, 2, 0 }, { 17, 1, 2 }, {-17, 1, 2 } |
| 168 | }, |
| 169 | //level_add |
| 170 | { 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 }, |
| 171 | 2, //golomb_order |
| 172 | 7, //inc_limit |
| 173 | 5, //max_run |
| 174 | }, |
| 175 | { |
| 176 | { //level / run |
| 177 | { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, |
| 178 | { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 }, |
| 179 | { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 }, |
| 180 | { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 11, 1, 1 }, |
| 181 | {-11, 1, 1 }, { 12, 1, 1 }, {-12, 1, 1 }, { 13, 1, 1 }, {-13, 1, 1 }, { 2, 2, 0 }, |
| 182 | { -2, 2, 0 }, { 14, 1, 1 }, {-14, 1, 1 }, { 15, 1, 1 }, {-15, 1, 1 }, { 3, 2, 0 }, |
| 183 | { -3, 2, 0 }, { 16, 1, 1 }, {-16, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 17, 1, 1 }, |
| 184 | {-17, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 18, 1, 1 }, {-18, 1, 1 }, { 5, 2, 0 }, |
| 185 | { -5, 2, 0 }, { 19, 1, 1 }, {-19, 1, 1 }, { 20, 1, 1 }, {-20, 1, 1 }, { 6, 2, 0 }, |
| 186 | { -6, 2, 0 }, { 21, 1, 1 }, {-21, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 } |
| 187 | }, |
| 188 | //level_add |
| 189 | { 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 }, |
| 190 | 2, //golomb_order |
| 191 | 10, //inc_limit |
| 192 | 3, //max_run |
| 193 | }, |
| 194 | { |
| 195 | { //level / run |
| 196 | { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, |
| 197 | { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 }, |
| 198 | { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 9, 1, 0 }, |
| 199 | { -9, 1, 0 }, { 10, 1, 0 }, {-10, 1, 0 }, { 11, 1, 0 }, {-11, 1, 0 }, { 12, 1, 0 }, |
| 200 | {-12, 1, 0 }, { 13, 1, 0 }, {-13, 1, 0 }, { 14, 1, 0 }, {-14, 1, 0 }, { 15, 1, 0 }, |
| 201 | {-15, 1, 0 }, { 16, 1, 0 }, {-16, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 17, 1, 0 }, |
| 202 | {-17, 1, 0 }, { 18, 1, 0 }, {-18, 1, 0 }, { 19, 1, 0 }, {-19, 1, 0 }, { 20, 1, 0 }, |
| 203 | {-20, 1, 0 }, { 21, 1, 0 }, {-21, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 22, 1, 0 }, |
| 204 | {-22, 1, 0 }, { 23, 1, 0 }, {-23, 1, 0 }, { 24, 1, 0 }, {-24, 1, 0 }, { 25, 1, 0 }, |
| 205 | {-25, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 26, 1, 0 }, {-26, 1, 0 } |
| 206 | }, |
| 207 | //level_add |
| 208 | { 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 }, |
| 209 | 2, //golomb_order |
| 210 | INT_MAX, //inc_limit |
| 211 | 2, //max_run |
| 212 | } |
| 213 | }; |
| 214 | |
| 215 | static const struct dec_2dvlc inter_dec[7] = { |
| 216 | { |
| 217 | { //level / run |
| 218 | { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 }, |
| 219 | { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 }, |
| 220 | { 1, 7, 1 }, { -1, 7, 1 }, { 1, 8, 1 }, { -1, 8, 1 }, { 1, 9, 1 }, { -1, 9, 1 }, |
| 221 | { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, { 1, 12, 1 }, { -1, 12, 1 }, |
| 222 | { 1, 13, 1 }, { -1, 13, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 14, 1 }, { -1, 14, 1 }, |
| 223 | { 1, 15, 1 }, { -1, 15, 1 }, { 1, 16, 1 }, { -1, 16, 1 }, { 1, 17, 1 }, { -1, 17, 1 }, |
| 224 | { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, |
| 225 | { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 2, 2, 2 }, { -2, 2, 2 }, |
| 226 | { 1, 22, 1 }, { -1, 22, 1 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 }, |
| 227 | { 1, 25, 1 }, { -1, 25, 1 }, { 1, 26, 1 }, { -1, 26, 1 }, { EOB } |
| 228 | }, |
| 229 | //level_add |
| 230 | { 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 }, |
| 231 | 3, //golomb_order |
| 232 | 0, //inc_limit |
| 233 | 26 //max_run |
| 234 | }, |
| 235 | { |
| 236 | { //level / run |
| 237 | { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 1, 3, 0 }, |
| 238 | { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 }, |
| 239 | { -1, 6, 0 }, { 2, 1, 1 }, { -2, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 1, 8, 0 }, |
| 240 | { -1, 8, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 2, 2, 1 }, |
| 241 | { -2, 2, 1 }, { 1, 11, 0 }, { -1, 11, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 1, 2 }, |
| 242 | { -3, 1, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 }, { -1, 14, 0 }, { 2, 3, 1 }, |
| 243 | { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 }, { -2, 4, 1 }, { 1, 16, 0 }, |
| 244 | { -1, 16, 0 }, { 2, 5, 1 }, { -2, 5, 1 }, { 1, 17, 0 }, { -1, 17, 0 }, { 4, 1, 3 }, |
| 245 | { -4, 1, 3 }, { 2, 6, 1 }, { -2, 6, 1 }, { 1, 18, 0 }, { -1, 18, 0 }, { 1, 19, 0 }, |
| 246 | { -1, 19, 0 }, { 2, 7, 1 }, { -2, 7, 1 }, { 3, 2, 2 }, { -3, 2, 2 } |
| 247 | }, |
| 248 | //level_add |
| 249 | { 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 }, |
| 250 | 2, //golomb_order |
| 251 | 1, //inc_limit |
| 252 | 19 //max_run |
| 253 | }, |
| 254 | { |
| 255 | { //level / run |
| 256 | { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 0 }, |
| 257 | { -2, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 3, 1, 1 }, |
| 258 | { -3, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 1, 6, 0 }, |
| 259 | { -1, 6, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 1, 2 }, |
| 260 | { -4, 1, 2 }, { 1, 8, 0 }, { -1, 8, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 4, 0 }, |
| 261 | { -2, 4, 0 }, { 1, 9, 0 }, { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 5, 1, 2 }, |
| 262 | { -5, 1, 2 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 2, 6, 0 }, |
| 263 | { -2, 6, 0 }, { 1, 12, 0 }, { -1, 12, 0 }, { 3, 3, 1 }, { -3, 3, 1 }, { 6, 1, 2 }, |
| 264 | { -6, 1, 2 }, { 4, 2, 2 }, { -4, 2, 2 }, { 1, 13, 0 }, { -1, 13, 0 }, { 2, 7, 0 }, |
| 265 | { -2, 7, 0 }, { 3, 4, 1 }, { -3, 4, 1 }, { 1, 14, 0 }, { -1, 14, 0 } |
| 266 | }, |
| 267 | //level_add |
| 268 | { 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 }, |
| 269 | 2, //golomb_order |
| 270 | 2, //inc_limit |
| 271 | 14 //max_run |
| 272 | }, |
| 273 | { |
| 274 | { //level / run |
| 275 | { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 }, |
| 276 | { -1, 2, 0 }, { 3, 1, 0 }, { -3, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 2, 2, 0 }, |
| 277 | { -2, 2, 0 }, { 4, 1, 1 }, { -4, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 1 }, |
| 278 | { -5, 1, 1 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 2, 3, 0 }, |
| 279 | { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 2, 4, 0 }, |
| 280 | { -2, 4, 0 }, { 1, 7, 0 }, { -1, 7, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 7, 1, 2 }, |
| 281 | { -7, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 5, 0 }, |
| 282 | { -2, 5, 0 }, { 8, 1, 2 }, { -8, 1, 2 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 4, 0 }, |
| 283 | { -3, 4, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 1, 10, 0 }, |
| 284 | { -1, 10, 0 }, { 9, 1, 2 }, { -9, 1, 2 }, { 4, 3, 1 }, { -4, 3, 1 } |
| 285 | }, |
| 286 | //level_add |
| 287 | { 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 }, |
| 288 | 2, //golomb_order |
| 289 | 3, //inc_limit |
| 290 | 10 //max_run |
| 291 | }, |
| 292 | { |
| 293 | { //level / run |
| 294 | { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, |
| 295 | { -3, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, |
| 296 | { -5, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 6, 1, 0 }, |
| 297 | { -6, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 1, 4, 0 }, |
| 298 | { -1, 4, 0 }, { 8, 1, 1 }, { -8, 1, 1 }, { 2, 3, 0 }, { -2, 3, 0 }, { 4, 2, 0 }, |
| 299 | { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 9, 1, 1 }, { -9, 1, 1 }, { 5, 2, 0 }, |
| 300 | { -5, 2, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 10, 1, 2 }, |
| 301 | {-10, 1, 2 }, { 3, 3, 0 }, { -3, 3, 0 }, { 11, 1, 2 }, {-11, 1, 2 }, { 1, 7, 0 }, |
| 302 | { -1, 7, 0 }, { 6, 2, 0 }, { -6, 2, 0 }, { 3, 4, 0 }, { -3, 4, 0 }, { 2, 5, 0 }, |
| 303 | { -2, 5, 0 }, { 12, 1, 2 }, {-12, 1, 2 }, { 4, 3, 0 }, { -4, 3, 0 } |
| 304 | }, |
| 305 | //level_add |
| 306 | { 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 }, |
| 307 | 2, //golomb_order |
| 308 | 6, //inc_limit |
| 309 | 7 //max_run |
| 310 | }, |
| 311 | { |
| 312 | { //level / run |
| 313 | { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, |
| 314 | { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 1, 2, 0 }, |
| 315 | { -1, 2, 0 }, { 6, 1, 0 }, { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, |
| 316 | { -8, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 1, 3, 0 }, |
| 317 | { -1, 3, 0 }, { 10, 1, 1 }, { -10, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 11, 1, 1 }, |
| 318 | { -11, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 12, 1, 1 }, { -12, 1, 1 }, { 1, 4, 0 }, |
| 319 | { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 13, 1, 1 }, { -13, 1, 1 }, { 5, 2, 0 }, |
| 320 | { -5, 2, 0 }, { 14, 1, 1 }, { -14, 1, 1 }, { 6, 2, 0 }, { -6, 2, 0 }, { 1, 5, 0 }, |
| 321 | { -1, 5, 0 }, { 15, 1, 1 }, { -15, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 16, 1, 1 }, |
| 322 | { -16, 1, 1 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 2, 0 }, { -7, 2, 0 } |
| 323 | }, |
| 324 | //level_add |
| 325 | { 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 }, |
| 326 | 2, //golomb_order |
| 327 | 9, //inc_limit |
| 328 | 5 //max_run |
| 329 | }, |
| 330 | { |
| 331 | { //level / run |
| 332 | { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, |
| 333 | { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 }, |
| 334 | { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 8, 1, 0 }, |
| 335 | { -8, 1, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 }, |
| 336 | { -11, 1, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 13, 1, 0 }, |
| 337 | { -13, 1, 0 }, { 1, 3, 0 }, { -1, 3, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 15, 1, 0 }, |
| 338 | { -15, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 16, 1, 0 }, { -16, 1, 0 }, { 17, 1, 0 }, |
| 339 | { -17, 1, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 19, 1, 0 }, |
| 340 | { -19, 1, 0 }, { 20, 1, 0 }, { -20, 1, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 1, 4, 0 }, |
| 341 | { -1, 4, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 21, 1, 0 }, { -21, 1, 0 } |
| 342 | }, |
| 343 | //level_add |
| 344 | { 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 }, |
| 345 | 2, //golomb_order |
| 346 | INT_MAX, //inc_limit |
| 347 | 4 //max_run |
| 348 | } |
| 349 | }; |
| 350 | |
| 351 | static const struct dec_2dvlc chroma_dec[5] = { |
| 352 | { |
| 353 | { //level / run |
| 354 | { 1, 1, 1 }, { -1, 1, 1 }, { 1, 2, 1 }, { -1, 2, 1 }, { 1, 3, 1 }, { -1, 3, 1 }, |
| 355 | { 1, 4, 1 }, { -1, 4, 1 }, { 1, 5, 1 }, { -1, 5, 1 }, { 1, 6, 1 }, { -1, 6, 1 }, |
| 356 | { 1, 7, 1 }, { -1, 7, 1 }, { 2, 1, 2 }, { -2, 1, 2 }, { 1, 8, 1 }, { -1, 8, 1 }, |
| 357 | { 1, 9, 1 }, { -1, 9, 1 }, { 1, 10, 1 }, { -1, 10, 1 }, { 1, 11, 1 }, { -1, 11, 1 }, |
| 358 | { 1, 12, 1 }, { -1, 12, 1 }, { 1, 13, 1 }, { -1, 13, 1 }, { 1, 14, 1 }, { -1, 14, 1 }, |
| 359 | { 1, 15, 1 }, { -1, 15, 1 }, { 3, 1, 3 }, { -3, 1, 3 }, { 1, 16, 1 }, { -1, 16, 1 }, |
| 360 | { 1, 17, 1 }, { -1, 17, 1 }, { 1, 18, 1 }, { -1, 18, 1 }, { 1, 19, 1 }, { -1, 19, 1 }, |
| 361 | { 1, 20, 1 }, { -1, 20, 1 }, { 1, 21, 1 }, { -1, 21, 1 }, { 1, 22, 1 }, { -1, 22, 1 }, |
| 362 | { 2, 2, 2 }, { -2, 2, 2 }, { 1, 23, 1 }, { -1, 23, 1 }, { 1, 24, 1 }, { -1, 24, 1 }, |
| 363 | { 1, 25, 1 }, { -1, 25, 1 }, { 4, 1, 3 }, { -4, 1, 3 }, { EOB } |
| 364 | }, |
| 365 | //level_add |
| 366 | { 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 }, |
| 367 | 2, //golomb_order |
| 368 | 0, //inc_limit |
| 369 | 25 //max_run |
| 370 | }, |
| 371 | { |
| 372 | { //level / run |
| 373 | { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 2, 1, 1 }, |
| 374 | { -2, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 1, 5, 0 }, |
| 375 | { -1, 5, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 3, 1, 2 }, { -3, 1, 2 }, { 1, 7, 0 }, |
| 376 | { -1, 7, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, { 2, 2, 1 }, { -2, 2, 1 }, { 1, 9, 0 }, |
| 377 | { -1, 9, 0 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 4, 1, 2 }, |
| 378 | { -4, 1, 2 }, { 1, 12, 0 }, { -1, 12, 0 }, { 1, 13, 0 }, { -1, 13, 0 }, { 1, 14, 0 }, |
| 379 | { -1, 14, 0 }, { 2, 3, 1 }, { -2, 3, 1 }, { 1, 15, 0 }, { -1, 15, 0 }, { 2, 4, 1 }, |
| 380 | { -2, 4, 1 }, { 5, 1, 3 }, { -5, 1, 3 }, { 3, 2, 2 }, { -3, 2, 2 }, { 1, 16, 0 }, |
| 381 | { -1, 16, 0 }, { 1, 17, 0 }, { -1, 17, 0 }, { 1, 18, 0 }, { -1, 18, 0 }, { 2, 5, 1 }, |
| 382 | { -2, 5, 1 }, { 1, 19, 0 }, { -1, 19, 0 }, { 1, 20, 0 }, { -1, 20, 0 } |
| 383 | }, |
| 384 | //level_add |
| 385 | { 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 }, |
| 386 | 0, //golomb_order |
| 387 | 1, //inc_limit |
| 388 | 20 //max_run |
| 389 | }, |
| 390 | { |
| 391 | { //level / run |
| 392 | { 1, 1, 0 }, { -1, 1, 0 }, { EOB }, { 2, 1, 0 }, { -2, 1, 0 }, { 1, 2, 0 }, |
| 393 | { -1, 2, 0 }, { 3, 1, 1 }, { -3, 1, 1 }, { 1, 3, 0 }, { -1, 3, 0 }, { 4, 1, 1 }, |
| 394 | { -4, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 1, 4, 0 }, { -1, 4, 0 }, { 5, 1, 2 }, |
| 395 | { -5, 1, 2 }, { 1, 5, 0 }, { -1, 5, 0 }, { 3, 2, 1 }, { -3, 2, 1 }, { 2, 3, 0 }, |
| 396 | { -2, 3, 0 }, { 1, 6, 0 }, { -1, 6, 0 }, { 6, 1, 2 }, { -6, 1, 2 }, { 1, 7, 0 }, |
| 397 | { -1, 7, 0 }, { 2, 4, 0 }, { -2, 4, 0 }, { 7, 1, 2 }, { -7, 1, 2 }, { 1, 8, 0 }, |
| 398 | { -1, 8, 0 }, { 4, 2, 1 }, { -4, 2, 1 }, { 1, 9, 0 }, { -1, 9, 0 }, { 3, 3, 1 }, |
| 399 | { -3, 3, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 2, 6, 0 }, { -2, 6, 0 }, { 8, 1, 2 }, |
| 400 | { -8, 1, 2 }, { 1, 10, 0 }, { -1, 10, 0 }, { 1, 11, 0 }, { -1, 11, 0 }, { 9, 1, 2 }, |
| 401 | { -9, 1, 2 }, { 5, 2, 2 }, { -5, 2, 2 }, { 3, 4, 1 }, { -3, 4, 1 }, |
| 402 | }, |
| 403 | //level_add |
| 404 | { 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 }, |
| 405 | 1, //golomb_order |
| 406 | 2, //inc_limit |
| 407 | 11 //max_run |
| 408 | }, |
| 409 | { |
| 410 | { //level / run |
| 411 | { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, |
| 412 | { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 1, 2, 0 }, { -1, 2, 0 }, { 5, 1, 1 }, |
| 413 | { -5, 1, 1 }, { 2, 2, 0 }, { -2, 2, 0 }, { 6, 1, 1 }, { -6, 1, 1 }, { 1, 3, 0 }, |
| 414 | { -1, 3, 0 }, { 7, 1, 1 }, { -7, 1, 1 }, { 3, 2, 0 }, { -3, 2, 0 }, { 8, 1, 1 }, |
| 415 | { -8, 1, 1 }, { 1, 4, 0 }, { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 9, 1, 1 }, |
| 416 | { -9, 1, 1 }, { 4, 2, 0 }, { -4, 2, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, { 10, 1, 1 }, |
| 417 | {-10, 1, 1 }, { 3, 3, 0 }, { -3, 3, 0 }, { 5, 2, 1 }, { -5, 2, 1 }, { 2, 4, 0 }, |
| 418 | { -2, 4, 0 }, { 11, 1, 1 }, {-11, 1, 1 }, { 1, 6, 0 }, { -1, 6, 0 }, { 12, 1, 1 }, |
| 419 | {-12, 1, 1 }, { 1, 7, 0 }, { -1, 7, 0 }, { 6, 2, 1 }, { -6, 2, 1 }, { 13, 1, 1 }, |
| 420 | {-13, 1, 1 }, { 2, 5, 0 }, { -2, 5, 0 }, { 1, 8, 0 }, { -1, 8, 0 }, |
| 421 | }, |
| 422 | //level_add |
| 423 | { 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 }, |
| 424 | 1, //golomb_order |
| 425 | 4, //inc_limit |
| 426 | 8 //max_run |
| 427 | }, |
| 428 | { |
| 429 | { //level / run |
| 430 | { EOB }, { 1, 1, 0 }, { -1, 1, 0 }, { 2, 1, 0 }, { -2, 1, 0 }, { 3, 1, 0 }, |
| 431 | { -3, 1, 0 }, { 4, 1, 0 }, { -4, 1, 0 }, { 5, 1, 0 }, { -5, 1, 0 }, { 6, 1, 0 }, |
| 432 | { -6, 1, 0 }, { 7, 1, 0 }, { -7, 1, 0 }, { 8, 1, 0 }, { -8, 1, 0 }, { 1, 2, 0 }, |
| 433 | { -1, 2, 0 }, { 9, 1, 0 }, { -9, 1, 0 }, { 10, 1, 0 }, { -10, 1, 0 }, { 11, 1, 0 }, |
| 434 | { -11, 1, 0 }, { 2, 2, 0 }, { -2, 2, 0 }, { 12, 1, 0 }, { -12, 1, 0 }, { 13, 1, 0 }, |
| 435 | { -13, 1, 0 }, { 3, 2, 0 }, { -3, 2, 0 }, { 14, 1, 0 }, { -14, 1, 0 }, { 1, 3, 0 }, |
| 436 | { -1, 3, 0 }, { 15, 1, 0 }, { -15, 1, 0 }, { 4, 2, 0 }, { -4, 2, 0 }, { 16, 1, 0 }, |
| 437 | { -16, 1, 0 }, { 17, 1, 0 }, { -17, 1, 0 }, { 5, 2, 0 }, { -5, 2, 0 }, { 1, 4, 0 }, |
| 438 | { -1, 4, 0 }, { 2, 3, 0 }, { -2, 3, 0 }, { 18, 1, 0 }, { -18, 1, 0 }, { 6, 2, 0 }, |
| 439 | { -6, 2, 0 }, { 19, 1, 0 }, { -19, 1, 0 }, { 1, 5, 0 }, { -1, 5, 0 }, |
| 440 | }, |
| 441 | //level_add |
| 442 | { 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 }, |
| 443 | 0, //golomb_order |
| 444 | INT_MAX, //inc_limit |
| 445 | 5, //max_run |
| 446 | } |
| 447 | }; |
| 448 | |
| 449 | #undef EOB |
| 450 | |
| 451 | /***************************************************************************** |
| 452 | * |
| 453 | * motion vector prediction |
| 454 | * |
| 455 | ****************************************************************************/ |
| 456 | |
| 457 | static inline void store_mvs(AVSContext *h) |
| 458 | { |
| 459 | h->col_mv[h->mbidx * 4 + 0] = h->mv[MV_FWD_X0]; |
| 460 | h->col_mv[h->mbidx * 4 + 1] = h->mv[MV_FWD_X1]; |
| 461 | h->col_mv[h->mbidx * 4 + 2] = h->mv[MV_FWD_X2]; |
| 462 | h->col_mv[h->mbidx * 4 + 3] = h->mv[MV_FWD_X3]; |
| 463 | } |
| 464 | |
| 465 | static inline void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw, |
| 466 | cavs_vector *col_mv) |
| 467 | { |
| 468 | cavs_vector *pmv_bw = pmv_fw + MV_BWD_OFFS; |
| 469 | int den = h->direct_den[col_mv->ref]; |
| 470 | int m = FF_SIGNBIT(col_mv->x); |
| 471 | |
| 472 | pmv_fw->dist = h->dist[1]; |
| 473 | pmv_bw->dist = h->dist[0]; |
| 474 | pmv_fw->ref = 1; |
| 475 | pmv_bw->ref = 0; |
| 476 | /* scale the co-located motion vector according to its temporal span */ |
| 477 | pmv_fw->x = (((den + (den * col_mv->x * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m; |
| 478 | pmv_bw->x = m - (((den + (den * col_mv->x * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m); |
| 479 | m = FF_SIGNBIT(col_mv->y); |
| 480 | pmv_fw->y = (((den + (den * col_mv->y * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m; |
| 481 | pmv_bw->y = m - (((den + (den * col_mv->y * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m); |
| 482 | } |
| 483 | |
| 484 | static inline void mv_pred_sym(AVSContext *h, cavs_vector *src, |
| 485 | enum cavs_block size) |
| 486 | { |
| 487 | cavs_vector *dst = src + MV_BWD_OFFS; |
| 488 | |
| 489 | /* backward mv is the scaled and negated forward mv */ |
| 490 | dst->x = -((src->x * h->sym_factor + 256) >> 9); |
| 491 | dst->y = -((src->y * h->sym_factor + 256) >> 9); |
| 492 | dst->ref = 0; |
| 493 | dst->dist = h->dist[0]; |
| 494 | set_mvs(dst, size); |
| 495 | } |
| 496 | |
| 497 | /***************************************************************************** |
| 498 | * |
| 499 | * residual data decoding |
| 500 | * |
| 501 | ****************************************************************************/ |
| 502 | |
| 503 | /** kth-order exponential golomb code */ |
| 504 | static inline int get_ue_code(GetBitContext *gb, int order) |
| 505 | { |
| 506 | unsigned ret = get_ue_golomb(gb); |
| 507 | if (ret >= ((1U<<31)>>order)) { |
| 508 | av_log(NULL, AV_LOG_ERROR, "get_ue_code: value too larger\n"); |
| 509 | return AVERROR_INVALIDDATA; |
| 510 | } |
| 511 | if (order) { |
| 512 | return (ret<<order) + get_bits(gb, order); |
| 513 | } |
| 514 | return ret; |
| 515 | } |
| 516 | |
| 517 | static inline int dequant(AVSContext *h, int16_t *level_buf, uint8_t *run_buf, |
| 518 | int16_t *dst, int mul, int shift, int coeff_num) |
| 519 | { |
| 520 | int round = 1 << (shift - 1); |
| 521 | int pos = -1; |
| 522 | const uint8_t *scantab = h->scantable.permutated; |
| 523 | |
| 524 | /* inverse scan and dequantization */ |
| 525 | while (--coeff_num >= 0) { |
| 526 | pos += run_buf[coeff_num]; |
| 527 | if (pos > 63) { |
| 528 | av_log(h->avctx, AV_LOG_ERROR, |
| 529 | "position out of block bounds at pic %d MB(%d,%d)\n", |
| 530 | h->cur.poc, h->mbx, h->mby); |
| 531 | return AVERROR_INVALIDDATA; |
| 532 | } |
| 533 | dst[scantab[pos]] = (level_buf[coeff_num] * mul + round) >> shift; |
| 534 | } |
| 535 | return 0; |
| 536 | } |
| 537 | |
| 538 | /** |
| 539 | * decode coefficients from one 8x8 block, dequantize, inverse transform |
| 540 | * and add them to sample block |
| 541 | * @param r pointer to 2D VLC table |
| 542 | * @param esc_golomb_order escape codes are k-golomb with this order k |
| 543 | * @param qp quantizer |
| 544 | * @param dst location of sample block |
| 545 | * @param stride line stride in frame buffer |
| 546 | */ |
| 547 | static int decode_residual_block(AVSContext *h, GetBitContext *gb, |
| 548 | const struct dec_2dvlc *r, int esc_golomb_order, |
| 549 | int qp, uint8_t *dst, int stride) |
| 550 | { |
| 551 | int i, esc_code, level, mask, ret; |
| 552 | unsigned int level_code, run; |
| 553 | int16_t level_buf[65]; |
| 554 | uint8_t run_buf[65]; |
| 555 | int16_t *block = h->block; |
| 556 | |
| 557 | for (i = 0; i < 65; i++) { |
| 558 | level_code = get_ue_code(gb, r->golomb_order); |
| 559 | if (level_code >= ESCAPE_CODE) { |
| 560 | run = ((level_code - ESCAPE_CODE) >> 1) + 1; |
| 561 | if(run > 64) { |
| 562 | av_log(h->avctx, AV_LOG_ERROR, "run %d is too large\n", run); |
| 563 | return AVERROR_INVALIDDATA; |
| 564 | } |
| 565 | esc_code = get_ue_code(gb, esc_golomb_order); |
| 566 | level = esc_code + (run > r->max_run ? 1 : r->level_add[run]); |
| 567 | while (level > r->inc_limit) |
| 568 | r++; |
| 569 | mask = -(level_code & 1); |
| 570 | level = (level ^ mask) - mask; |
| 571 | } else { |
| 572 | level = r->rltab[level_code][0]; |
| 573 | if (!level) //end of block signal |
| 574 | break; |
| 575 | run = r->rltab[level_code][1]; |
| 576 | r += r->rltab[level_code][2]; |
| 577 | } |
| 578 | level_buf[i] = level; |
| 579 | run_buf[i] = run; |
| 580 | } |
| 581 | if ((ret = dequant(h, level_buf, run_buf, block, dequant_mul[qp], |
| 582 | dequant_shift[qp], i)) < 0) |
| 583 | return ret; |
| 584 | h->cdsp.cavs_idct8_add(dst, block, stride); |
| 585 | h->bdsp.clear_block(block); |
| 586 | return 0; |
| 587 | } |
| 588 | |
| 589 | |
| 590 | static inline void decode_residual_chroma(AVSContext *h) |
| 591 | { |
| 592 | if (h->cbp & (1 << 4)) |
| 593 | decode_residual_block(h, &h->gb, chroma_dec, 0, |
| 594 | ff_cavs_chroma_qp[h->qp], h->cu, h->c_stride); |
| 595 | if (h->cbp & (1 << 5)) |
| 596 | decode_residual_block(h, &h->gb, chroma_dec, 0, |
| 597 | ff_cavs_chroma_qp[h->qp], h->cv, h->c_stride); |
| 598 | } |
| 599 | |
| 600 | static inline int decode_residual_inter(AVSContext *h) |
| 601 | { |
| 602 | int block; |
| 603 | |
| 604 | /* get coded block pattern */ |
| 605 | int cbp = get_ue_golomb(&h->gb); |
| 606 | if (cbp > 63U) { |
| 607 | av_log(h->avctx, AV_LOG_ERROR, "illegal inter cbp %d\n", cbp); |
| 608 | return AVERROR_INVALIDDATA; |
| 609 | } |
| 610 | h->cbp = cbp_tab[cbp][1]; |
| 611 | |
| 612 | /* get quantizer */ |
| 613 | if (h->cbp && !h->qp_fixed) |
| 614 | h->qp = (h->qp + get_se_golomb(&h->gb)) & 63; |
| 615 | for (block = 0; block < 4; block++) |
| 616 | if (h->cbp & (1 << block)) |
| 617 | decode_residual_block(h, &h->gb, inter_dec, 0, h->qp, |
| 618 | h->cy + h->luma_scan[block], h->l_stride); |
| 619 | decode_residual_chroma(h); |
| 620 | |
| 621 | return 0; |
| 622 | } |
| 623 | |
| 624 | /***************************************************************************** |
| 625 | * |
| 626 | * macroblock level |
| 627 | * |
| 628 | ****************************************************************************/ |
| 629 | |
| 630 | static inline void set_mv_intra(AVSContext *h) |
| 631 | { |
| 632 | h->mv[MV_FWD_X0] = ff_cavs_intra_mv; |
| 633 | set_mvs(&h->mv[MV_FWD_X0], BLK_16X16); |
| 634 | h->mv[MV_BWD_X0] = ff_cavs_intra_mv; |
| 635 | set_mvs(&h->mv[MV_BWD_X0], BLK_16X16); |
| 636 | if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) |
| 637 | h->col_type_base[h->mbidx] = I_8X8; |
| 638 | } |
| 639 | |
| 640 | static int decode_mb_i(AVSContext *h, int cbp_code) |
| 641 | { |
| 642 | GetBitContext *gb = &h->gb; |
| 643 | unsigned pred_mode_uv; |
| 644 | int block; |
| 645 | uint8_t top[18]; |
| 646 | uint8_t *left = NULL; |
| 647 | uint8_t *d; |
| 648 | |
| 649 | ff_cavs_init_mb(h); |
| 650 | |
| 651 | /* get intra prediction modes from stream */ |
| 652 | for (block = 0; block < 4; block++) { |
| 653 | int nA, nB, predpred; |
| 654 | int pos = scan3x3[block]; |
| 655 | |
| 656 | nA = h->pred_mode_Y[pos - 1]; |
| 657 | nB = h->pred_mode_Y[pos - 3]; |
| 658 | predpred = FFMIN(nA, nB); |
| 659 | if (predpred == NOT_AVAIL) // if either is not available |
| 660 | predpred = INTRA_L_LP; |
| 661 | if (!get_bits1(gb)) { |
| 662 | int rem_mode = get_bits(gb, 2); |
| 663 | predpred = rem_mode + (rem_mode >= predpred); |
| 664 | } |
| 665 | h->pred_mode_Y[pos] = predpred; |
| 666 | } |
| 667 | pred_mode_uv = get_ue_golomb(gb); |
| 668 | if (pred_mode_uv > 6) { |
| 669 | av_log(h->avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n"); |
| 670 | return AVERROR_INVALIDDATA; |
| 671 | } |
| 672 | ff_cavs_modify_mb_i(h, &pred_mode_uv); |
| 673 | |
| 674 | /* get coded block pattern */ |
| 675 | if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) |
| 676 | cbp_code = get_ue_golomb(gb); |
| 677 | if (cbp_code > 63U) { |
| 678 | av_log(h->avctx, AV_LOG_ERROR, "illegal intra cbp\n"); |
| 679 | return AVERROR_INVALIDDATA; |
| 680 | } |
| 681 | h->cbp = cbp_tab[cbp_code][0]; |
| 682 | if (h->cbp && !h->qp_fixed) |
| 683 | h->qp = (h->qp + get_se_golomb(gb)) & 63; //qp_delta |
| 684 | |
| 685 | /* luma intra prediction interleaved with residual decode/transform/add */ |
| 686 | for (block = 0; block < 4; block++) { |
| 687 | d = h->cy + h->luma_scan[block]; |
| 688 | ff_cavs_load_intra_pred_luma(h, top, &left, block); |
| 689 | h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]] |
| 690 | (d, top, left, h->l_stride); |
| 691 | if (h->cbp & (1<<block)) |
| 692 | decode_residual_block(h, gb, intra_dec, 1, h->qp, d, h->l_stride); |
| 693 | } |
| 694 | |
| 695 | /* chroma intra prediction */ |
| 696 | ff_cavs_load_intra_pred_chroma(h); |
| 697 | h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx * 10], |
| 698 | h->left_border_u, h->c_stride); |
| 699 | h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx * 10], |
| 700 | h->left_border_v, h->c_stride); |
| 701 | |
| 702 | decode_residual_chroma(h); |
| 703 | ff_cavs_filter(h, I_8X8); |
| 704 | set_mv_intra(h); |
| 705 | return 0; |
| 706 | } |
| 707 | |
| 708 | static inline void set_intra_mode_default(AVSContext *h) |
| 709 | { |
| 710 | if (h->stream_revision > 0) { |
| 711 | h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL; |
| 712 | h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = NOT_AVAIL; |
| 713 | } else { |
| 714 | h->pred_mode_Y[3] = h->pred_mode_Y[6] = INTRA_L_LP; |
| 715 | h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = INTRA_L_LP; |
| 716 | } |
| 717 | } |
| 718 | |
| 719 | static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type) |
| 720 | { |
| 721 | GetBitContext *gb = &h->gb; |
| 722 | int ref[4]; |
| 723 | |
| 724 | ff_cavs_init_mb(h); |
| 725 | switch (mb_type) { |
| 726 | case P_SKIP: |
| 727 | ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0); |
| 728 | break; |
| 729 | case P_16X16: |
| 730 | ref[0] = h->ref_flag ? 0 : get_bits1(gb); |
| 731 | ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, ref[0]); |
| 732 | break; |
| 733 | case P_16X8: |
| 734 | ref[0] = h->ref_flag ? 0 : get_bits1(gb); |
| 735 | ref[2] = h->ref_flag ? 0 : get_bits1(gb); |
| 736 | ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, ref[0]); |
| 737 | ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, ref[2]); |
| 738 | break; |
| 739 | case P_8X16: |
| 740 | ref[0] = h->ref_flag ? 0 : get_bits1(gb); |
| 741 | ref[1] = h->ref_flag ? 0 : get_bits1(gb); |
| 742 | ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, ref[0]); |
| 743 | ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, ref[1]); |
| 744 | break; |
| 745 | case P_8X8: |
| 746 | ref[0] = h->ref_flag ? 0 : get_bits1(gb); |
| 747 | ref[1] = h->ref_flag ? 0 : get_bits1(gb); |
| 748 | ref[2] = h->ref_flag ? 0 : get_bits1(gb); |
| 749 | ref[3] = h->ref_flag ? 0 : get_bits1(gb); |
| 750 | ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN, BLK_8X8, ref[0]); |
| 751 | ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN, BLK_8X8, ref[1]); |
| 752 | ff_cavs_mv(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN, BLK_8X8, ref[2]); |
| 753 | ff_cavs_mv(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN, BLK_8X8, ref[3]); |
| 754 | } |
| 755 | ff_cavs_inter(h, mb_type); |
| 756 | set_intra_mode_default(h); |
| 757 | store_mvs(h); |
| 758 | if (mb_type != P_SKIP) |
| 759 | decode_residual_inter(h); |
| 760 | ff_cavs_filter(h, mb_type); |
| 761 | h->col_type_base[h->mbidx] = mb_type; |
| 762 | } |
| 763 | |
| 764 | static int decode_mb_b(AVSContext *h, enum cavs_mb mb_type) |
| 765 | { |
| 766 | int block; |
| 767 | enum cavs_sub_mb sub_type[4]; |
| 768 | int flags; |
| 769 | |
| 770 | ff_cavs_init_mb(h); |
| 771 | |
| 772 | /* reset all MVs */ |
| 773 | h->mv[MV_FWD_X0] = ff_cavs_dir_mv; |
| 774 | set_mvs(&h->mv[MV_FWD_X0], BLK_16X16); |
| 775 | h->mv[MV_BWD_X0] = ff_cavs_dir_mv; |
| 776 | set_mvs(&h->mv[MV_BWD_X0], BLK_16X16); |
| 777 | switch (mb_type) { |
| 778 | case B_SKIP: |
| 779 | case B_DIRECT: |
| 780 | if (!h->col_type_base[h->mbidx]) { |
| 781 | /* intra MB at co-location, do in-plane prediction */ |
| 782 | ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1); |
| 783 | ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0); |
| 784 | } else |
| 785 | /* direct prediction from co-located P MB, block-wise */ |
| 786 | for (block = 0; block < 4; block++) |
| 787 | mv_pred_direct(h, &h->mv[mv_scan[block]], |
| 788 | &h->col_mv[h->mbidx * 4 + block]); |
| 789 | break; |
| 790 | case B_FWD_16X16: |
| 791 | ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1); |
| 792 | break; |
| 793 | case B_SYM_16X16: |
| 794 | ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1); |
| 795 | mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16); |
| 796 | break; |
| 797 | case B_BWD_16X16: |
| 798 | ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0); |
| 799 | break; |
| 800 | case B_8X8: |
| 801 | #define TMP_UNUSED_INX 7 |
| 802 | flags = 0; |
| 803 | for (block = 0; block < 4; block++) |
| 804 | sub_type[block] = get_bits(&h->gb, 2); |
| 805 | for (block = 0; block < 4; block++) { |
| 806 | switch (sub_type[block]) { |
| 807 | case B_SUB_DIRECT: |
| 808 | if (!h->col_type_base[h->mbidx]) { |
| 809 | /* intra MB at co-location, do in-plane prediction */ |
| 810 | if(flags==0) { |
| 811 | // if col-MB is a Intra MB, current Block size is 16x16. |
| 812 | // AVS standard section 9.9.1 |
| 813 | if(block>0){ |
| 814 | h->mv[TMP_UNUSED_INX ] = h->mv[MV_FWD_X0 ]; |
| 815 | h->mv[TMP_UNUSED_INX + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS]; |
| 816 | } |
| 817 | ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, |
| 818 | MV_PRED_BSKIP, BLK_8X8, 1); |
| 819 | ff_cavs_mv(h, MV_FWD_X0+MV_BWD_OFFS, |
| 820 | MV_FWD_C2+MV_BWD_OFFS, |
| 821 | MV_PRED_BSKIP, BLK_8X8, 0); |
| 822 | if(block>0) { |
| 823 | flags = mv_scan[block]; |
| 824 | h->mv[flags ] = h->mv[MV_FWD_X0 ]; |
| 825 | h->mv[flags + MV_BWD_OFFS] = h->mv[MV_FWD_X0 + MV_BWD_OFFS]; |
| 826 | h->mv[MV_FWD_X0 ] = h->mv[TMP_UNUSED_INX ]; |
| 827 | h->mv[MV_FWD_X0 + MV_BWD_OFFS] = h->mv[TMP_UNUSED_INX + MV_BWD_OFFS]; |
| 828 | } else |
| 829 | flags = MV_FWD_X0; |
| 830 | } else { |
| 831 | h->mv[mv_scan[block] ] = h->mv[flags ]; |
| 832 | h->mv[mv_scan[block] + MV_BWD_OFFS] = h->mv[flags + MV_BWD_OFFS]; |
| 833 | } |
| 834 | } else |
| 835 | mv_pred_direct(h, &h->mv[mv_scan[block]], |
| 836 | &h->col_mv[h->mbidx * 4 + block]); |
| 837 | break; |
| 838 | case B_SUB_FWD: |
| 839 | ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3, |
| 840 | MV_PRED_MEDIAN, BLK_8X8, 1); |
| 841 | break; |
| 842 | case B_SUB_SYM: |
| 843 | ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3, |
| 844 | MV_PRED_MEDIAN, BLK_8X8, 1); |
| 845 | mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8); |
| 846 | break; |
| 847 | } |
| 848 | } |
| 849 | #undef TMP_UNUSED_INX |
| 850 | for (block = 0; block < 4; block++) { |
| 851 | if (sub_type[block] == B_SUB_BWD) |
| 852 | ff_cavs_mv(h, mv_scan[block] + MV_BWD_OFFS, |
| 853 | mv_scan[block] + MV_BWD_OFFS - 3, |
| 854 | MV_PRED_MEDIAN, BLK_8X8, 0); |
| 855 | } |
| 856 | break; |
| 857 | default: |
| 858 | if (mb_type <= B_SYM_16X16) { |
| 859 | av_log(h->avctx, AV_LOG_ERROR, "Invalid mb_type %d in B frame\n", mb_type); |
| 860 | return AVERROR_INVALIDDATA; |
| 861 | } |
| 862 | av_assert2(mb_type < B_8X8); |
| 863 | flags = ff_cavs_partition_flags[mb_type]; |
| 864 | if (mb_type & 1) { /* 16x8 macroblock types */ |
| 865 | if (flags & FWD0) |
| 866 | ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP, BLK_16X8, 1); |
| 867 | if (flags & SYM0) |
| 868 | mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8); |
| 869 | if (flags & FWD1) |
| 870 | ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1); |
| 871 | if (flags & SYM1) |
| 872 | mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8); |
| 873 | if (flags & BWD0) |
| 874 | ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP, BLK_16X8, 0); |
| 875 | if (flags & BWD1) |
| 876 | ff_cavs_mv(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0); |
| 877 | } else { /* 8x16 macroblock types */ |
| 878 | if (flags & FWD0) |
| 879 | ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1); |
| 880 | if (flags & SYM0) |
| 881 | mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16); |
| 882 | if (flags & FWD1) |
| 883 | ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 1); |
| 884 | if (flags & SYM1) |
| 885 | mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16); |
| 886 | if (flags & BWD0) |
| 887 | ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0); |
| 888 | if (flags & BWD1) |
| 889 | ff_cavs_mv(h, MV_BWD_X1, MV_BWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 0); |
| 890 | } |
| 891 | } |
| 892 | ff_cavs_inter(h, mb_type); |
| 893 | set_intra_mode_default(h); |
| 894 | if (mb_type != B_SKIP) |
| 895 | decode_residual_inter(h); |
| 896 | ff_cavs_filter(h, mb_type); |
| 897 | |
| 898 | return 0; |
| 899 | } |
| 900 | |
| 901 | /***************************************************************************** |
| 902 | * |
| 903 | * slice level |
| 904 | * |
| 905 | ****************************************************************************/ |
| 906 | |
| 907 | static inline int decode_slice_header(AVSContext *h, GetBitContext *gb) |
| 908 | { |
| 909 | if (h->stc > 0xAF) |
| 910 | av_log(h->avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc); |
| 911 | |
| 912 | if (h->stc >= h->mb_height) { |
| 913 | av_log(h->avctx, AV_LOG_ERROR, "stc 0x%02x is too large\n", h->stc); |
| 914 | return AVERROR_INVALIDDATA; |
| 915 | } |
| 916 | |
| 917 | h->mby = h->stc; |
| 918 | h->mbidx = h->mby * h->mb_width; |
| 919 | |
| 920 | /* mark top macroblocks as unavailable */ |
| 921 | h->flags &= ~(B_AVAIL | C_AVAIL); |
| 922 | if (!h->pic_qp_fixed) { |
| 923 | h->qp_fixed = get_bits1(gb); |
| 924 | h->qp = get_bits(gb, 6); |
| 925 | } |
| 926 | /* inter frame or second slice can have weighting params */ |
| 927 | if ((h->cur.f->pict_type != AV_PICTURE_TYPE_I) || |
| 928 | (!h->pic_structure && h->mby >= h->mb_width / 2)) |
| 929 | if (get_bits1(gb)) { //slice_weighting_flag |
| 930 | av_log(h->avctx, AV_LOG_ERROR, |
| 931 | "weighted prediction not yet supported\n"); |
| 932 | } |
| 933 | return 0; |
| 934 | } |
| 935 | |
| 936 | static inline int check_for_slice(AVSContext *h) |
| 937 | { |
| 938 | GetBitContext *gb = &h->gb; |
| 939 | int align; |
| 940 | |
| 941 | if (h->mbx) |
| 942 | return 0; |
| 943 | align = (-get_bits_count(gb)) & 7; |
| 944 | /* check for stuffing byte */ |
| 945 | if (!align && (show_bits(gb, 8) == 0x80)) |
| 946 | align = 8; |
| 947 | if ((show_bits_long(gb, 24 + align) & 0xFFFFFF) == 0x000001) { |
| 948 | skip_bits_long(gb, 24 + align); |
| 949 | h->stc = get_bits(gb, 8); |
| 950 | if (h->stc >= h->mb_height) |
| 951 | return 0; |
| 952 | decode_slice_header(h, gb); |
| 953 | return 1; |
| 954 | } |
| 955 | return 0; |
| 956 | } |
| 957 | |
| 958 | /***************************************************************************** |
| 959 | * |
| 960 | * frame level |
| 961 | * |
| 962 | ****************************************************************************/ |
| 963 | |
| 964 | static int decode_pic(AVSContext *h) |
| 965 | { |
| 966 | int ret; |
| 967 | int skip_count = -1; |
| 968 | enum cavs_mb mb_type; |
| 969 | |
| 970 | if (!h->top_qp) { |
| 971 | av_log(h->avctx, AV_LOG_ERROR, "No sequence header decoded yet\n"); |
| 972 | return AVERROR_INVALIDDATA; |
| 973 | } |
| 974 | |
| 975 | av_frame_unref(h->cur.f); |
| 976 | |
| 977 | skip_bits(&h->gb, 16);//bbv_dwlay |
| 978 | if (h->stc == PIC_PB_START_CODE) { |
| 979 | h->cur.f->pict_type = get_bits(&h->gb, 2) + AV_PICTURE_TYPE_I; |
| 980 | if (h->cur.f->pict_type > AV_PICTURE_TYPE_B) { |
| 981 | av_log(h->avctx, AV_LOG_ERROR, "illegal picture type\n"); |
| 982 | return AVERROR_INVALIDDATA; |
| 983 | } |
| 984 | /* make sure we have the reference frames we need */ |
| 985 | if (!h->DPB[0].f->data[0] || |
| 986 | (!h->DPB[1].f->data[0] && h->cur.f->pict_type == AV_PICTURE_TYPE_B)) |
| 987 | return AVERROR_INVALIDDATA; |
| 988 | } else { |
| 989 | h->cur.f->pict_type = AV_PICTURE_TYPE_I; |
| 990 | if (get_bits1(&h->gb)) |
| 991 | skip_bits(&h->gb, 24);//time_code |
| 992 | /* old sample clips were all progressive and no low_delay, |
| 993 | bump stream revision if detected otherwise */ |
| 994 | if (h->low_delay || !(show_bits(&h->gb, 9) & 1)) |
| 995 | h->stream_revision = 1; |
| 996 | /* similarly test top_field_first and repeat_first_field */ |
| 997 | else if (show_bits(&h->gb, 11) & 3) |
| 998 | h->stream_revision = 1; |
| 999 | if (h->stream_revision > 0) |
| 1000 | skip_bits(&h->gb, 1); //marker_bit |
| 1001 | } |
| 1002 | |
| 1003 | ret = ff_get_buffer(h->avctx, h->cur.f, h->cur.f->pict_type == AV_PICTURE_TYPE_B ? |
| 1004 | 0 : AV_GET_BUFFER_FLAG_REF); |
| 1005 | if (ret < 0) |
| 1006 | return ret; |
| 1007 | |
| 1008 | if (!h->edge_emu_buffer) { |
| 1009 | int alloc_size = FFALIGN(FFABS(h->cur.f->linesize[0]) + 32, 32); |
| 1010 | h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 24); |
| 1011 | if (!h->edge_emu_buffer) |
| 1012 | return AVERROR(ENOMEM); |
| 1013 | } |
| 1014 | |
| 1015 | if ((ret = ff_cavs_init_pic(h)) < 0) |
| 1016 | return ret; |
| 1017 | h->cur.poc = get_bits(&h->gb, 8) * 2; |
| 1018 | |
| 1019 | /* get temporal distances and MV scaling factors */ |
| 1020 | if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) { |
| 1021 | h->dist[0] = (h->cur.poc - h->DPB[0].poc) & 511; |
| 1022 | } else { |
| 1023 | h->dist[0] = (h->DPB[0].poc - h->cur.poc) & 511; |
| 1024 | } |
| 1025 | h->dist[1] = (h->cur.poc - h->DPB[1].poc) & 511; |
| 1026 | h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0; |
| 1027 | h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0; |
| 1028 | if (h->cur.f->pict_type == AV_PICTURE_TYPE_B) { |
| 1029 | h->sym_factor = h->dist[0] * h->scale_den[1]; |
| 1030 | } else { |
| 1031 | h->direct_den[0] = h->dist[0] ? 16384 / h->dist[0] : 0; |
| 1032 | h->direct_den[1] = h->dist[1] ? 16384 / h->dist[1] : 0; |
| 1033 | } |
| 1034 | |
| 1035 | if (h->low_delay) |
| 1036 | get_ue_golomb(&h->gb); //bbv_check_times |
| 1037 | h->progressive = get_bits1(&h->gb); |
| 1038 | h->pic_structure = 1; |
| 1039 | if (!h->progressive) |
| 1040 | h->pic_structure = get_bits1(&h->gb); |
| 1041 | if (!h->pic_structure && h->stc == PIC_PB_START_CODE) |
| 1042 | skip_bits1(&h->gb); //advanced_pred_mode_disable |
| 1043 | skip_bits1(&h->gb); //top_field_first |
| 1044 | skip_bits1(&h->gb); //repeat_first_field |
| 1045 | h->pic_qp_fixed = |
| 1046 | h->qp_fixed = get_bits1(&h->gb); |
| 1047 | h->qp = get_bits(&h->gb, 6); |
| 1048 | if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) { |
| 1049 | if (!h->progressive && !h->pic_structure) |
| 1050 | skip_bits1(&h->gb);//what is this? |
| 1051 | skip_bits(&h->gb, 4); //reserved bits |
| 1052 | } else { |
| 1053 | if (!(h->cur.f->pict_type == AV_PICTURE_TYPE_B && h->pic_structure == 1)) |
| 1054 | h->ref_flag = get_bits1(&h->gb); |
| 1055 | skip_bits(&h->gb, 4); //reserved bits |
| 1056 | h->skip_mode_flag = get_bits1(&h->gb); |
| 1057 | } |
| 1058 | h->loop_filter_disable = get_bits1(&h->gb); |
| 1059 | if (!h->loop_filter_disable && get_bits1(&h->gb)) { |
| 1060 | h->alpha_offset = get_se_golomb(&h->gb); |
| 1061 | h->beta_offset = get_se_golomb(&h->gb); |
| 1062 | } else { |
| 1063 | h->alpha_offset = h->beta_offset = 0; |
| 1064 | } |
| 1065 | if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) { |
| 1066 | do { |
| 1067 | check_for_slice(h); |
| 1068 | decode_mb_i(h, 0); |
| 1069 | } while (ff_cavs_next_mb(h)); |
| 1070 | } else if (h->cur.f->pict_type == AV_PICTURE_TYPE_P) { |
| 1071 | do { |
| 1072 | if (check_for_slice(h)) |
| 1073 | skip_count = -1; |
| 1074 | if (h->skip_mode_flag && (skip_count < 0)) |
| 1075 | skip_count = get_ue_golomb(&h->gb); |
| 1076 | if (h->skip_mode_flag && skip_count--) { |
| 1077 | decode_mb_p(h, P_SKIP); |
| 1078 | } else { |
| 1079 | mb_type = get_ue_golomb(&h->gb) + P_SKIP + h->skip_mode_flag; |
| 1080 | if (mb_type > P_8X8) |
| 1081 | decode_mb_i(h, mb_type - P_8X8 - 1); |
| 1082 | else |
| 1083 | decode_mb_p(h, mb_type); |
| 1084 | } |
| 1085 | } while (ff_cavs_next_mb(h)); |
| 1086 | } else { /* AV_PICTURE_TYPE_B */ |
| 1087 | do { |
| 1088 | if (check_for_slice(h)) |
| 1089 | skip_count = -1; |
| 1090 | if (h->skip_mode_flag && (skip_count < 0)) |
| 1091 | skip_count = get_ue_golomb(&h->gb); |
| 1092 | if (h->skip_mode_flag && skip_count--) { |
| 1093 | decode_mb_b(h, B_SKIP); |
| 1094 | } else { |
| 1095 | mb_type = get_ue_golomb(&h->gb) + B_SKIP + h->skip_mode_flag; |
| 1096 | if (mb_type > B_8X8) |
| 1097 | decode_mb_i(h, mb_type - B_8X8 - 1); |
| 1098 | else |
| 1099 | decode_mb_b(h, mb_type); |
| 1100 | } |
| 1101 | } while (ff_cavs_next_mb(h)); |
| 1102 | } |
| 1103 | if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) { |
| 1104 | av_frame_unref(h->DPB[1].f); |
| 1105 | FFSWAP(AVSFrame, h->cur, h->DPB[1]); |
| 1106 | FFSWAP(AVSFrame, h->DPB[0], h->DPB[1]); |
| 1107 | } |
| 1108 | return 0; |
| 1109 | } |
| 1110 | |
| 1111 | /***************************************************************************** |
| 1112 | * |
| 1113 | * headers and interface |
| 1114 | * |
| 1115 | ****************************************************************************/ |
| 1116 | |
| 1117 | static int decode_seq_header(AVSContext *h) |
| 1118 | { |
| 1119 | int frame_rate_code; |
| 1120 | int width, height; |
| 1121 | |
| 1122 | h->profile = get_bits(&h->gb, 8); |
| 1123 | h->level = get_bits(&h->gb, 8); |
| 1124 | skip_bits1(&h->gb); //progressive sequence |
| 1125 | |
| 1126 | width = get_bits(&h->gb, 14); |
| 1127 | height = get_bits(&h->gb, 14); |
| 1128 | if ((h->width || h->height) && (h->width != width || h->height != height)) { |
| 1129 | avpriv_report_missing_feature(h->avctx, |
| 1130 | "Width/height changing in CAVS"); |
| 1131 | return AVERROR_PATCHWELCOME; |
| 1132 | } |
| 1133 | if (width <= 0 || height <= 0) { |
| 1134 | av_log(h->avctx, AV_LOG_ERROR, "Dimensions invalid\n"); |
| 1135 | return AVERROR_INVALIDDATA; |
| 1136 | } |
| 1137 | h->width = width; |
| 1138 | h->height = height; |
| 1139 | |
| 1140 | skip_bits(&h->gb, 2); //chroma format |
| 1141 | skip_bits(&h->gb, 3); //sample_precision |
| 1142 | h->aspect_ratio = get_bits(&h->gb, 4); |
| 1143 | frame_rate_code = get_bits(&h->gb, 4); |
| 1144 | skip_bits(&h->gb, 18); //bit_rate_lower |
| 1145 | skip_bits1(&h->gb); //marker_bit |
| 1146 | skip_bits(&h->gb, 12); //bit_rate_upper |
| 1147 | h->low_delay = get_bits1(&h->gb); |
| 1148 | h->mb_width = (h->width + 15) >> 4; |
| 1149 | h->mb_height = (h->height + 15) >> 4; |
| 1150 | h->avctx->framerate = ff_mpeg12_frame_rate_tab[frame_rate_code]; |
| 1151 | h->avctx->width = h->width; |
| 1152 | h->avctx->height = h->height; |
| 1153 | if (!h->top_qp) |
| 1154 | ff_cavs_init_top_lines(h); |
| 1155 | return 0; |
| 1156 | } |
| 1157 | |
| 1158 | static void cavs_flush(AVCodecContext * avctx) |
| 1159 | { |
| 1160 | AVSContext *h = avctx->priv_data; |
| 1161 | h->got_keyframe = 0; |
| 1162 | } |
| 1163 | |
| 1164 | static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, |
| 1165 | AVPacket *avpkt) |
| 1166 | { |
| 1167 | AVSContext *h = avctx->priv_data; |
| 1168 | const uint8_t *buf = avpkt->data; |
| 1169 | int buf_size = avpkt->size; |
| 1170 | uint32_t stc = -1; |
| 1171 | int input_size, ret; |
| 1172 | const uint8_t *buf_end; |
| 1173 | const uint8_t *buf_ptr; |
| 1174 | |
| 1175 | if (buf_size == 0) { |
| 1176 | if (!h->low_delay && h->DPB[0].f->data[0]) { |
| 1177 | *got_frame = 1; |
| 1178 | av_frame_move_ref(data, h->DPB[0].f); |
| 1179 | } |
| 1180 | return 0; |
| 1181 | } |
| 1182 | |
| 1183 | h->stc = 0; |
| 1184 | |
| 1185 | buf_ptr = buf; |
| 1186 | buf_end = buf + buf_size; |
| 1187 | for(;;) { |
| 1188 | buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &stc); |
| 1189 | if ((stc & 0xFFFFFE00) || buf_ptr == buf_end) { |
| 1190 | if (!h->stc) |
| 1191 | av_log(h->avctx, AV_LOG_WARNING, "no frame decoded\n"); |
| 1192 | return FFMAX(0, buf_ptr - buf); |
| 1193 | } |
| 1194 | input_size = (buf_end - buf_ptr) * 8; |
| 1195 | switch (stc) { |
| 1196 | case CAVS_START_CODE: |
| 1197 | init_get_bits(&h->gb, buf_ptr, input_size); |
| 1198 | decode_seq_header(h); |
| 1199 | break; |
| 1200 | case PIC_I_START_CODE: |
| 1201 | if (!h->got_keyframe) { |
| 1202 | av_frame_unref(h->DPB[0].f); |
| 1203 | av_frame_unref(h->DPB[1].f); |
| 1204 | h->got_keyframe = 1; |
| 1205 | } |
| 1206 | case PIC_PB_START_CODE: |
| 1207 | *got_frame = 0; |
| 1208 | if (!h->got_keyframe) |
| 1209 | break; |
| 1210 | init_get_bits(&h->gb, buf_ptr, input_size); |
| 1211 | h->stc = stc; |
| 1212 | if (decode_pic(h)) |
| 1213 | break; |
| 1214 | *got_frame = 1; |
| 1215 | if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) { |
| 1216 | if (h->DPB[!h->low_delay].f->data[0]) { |
| 1217 | if ((ret = av_frame_ref(data, h->DPB[!h->low_delay].f)) < 0) |
| 1218 | return ret; |
| 1219 | } else { |
| 1220 | *got_frame = 0; |
| 1221 | } |
| 1222 | } else { |
| 1223 | av_frame_move_ref(data, h->cur.f); |
| 1224 | } |
| 1225 | break; |
| 1226 | case EXT_START_CODE: |
| 1227 | //mpeg_decode_extension(avctx, buf_ptr, input_size); |
| 1228 | break; |
| 1229 | case USER_START_CODE: |
| 1230 | //mpeg_decode_user_data(avctx, buf_ptr, input_size); |
| 1231 | break; |
| 1232 | default: |
| 1233 | if (stc <= SLICE_MAX_START_CODE) { |
| 1234 | init_get_bits(&h->gb, buf_ptr, input_size); |
| 1235 | decode_slice_header(h, &h->gb); |
| 1236 | } |
| 1237 | break; |
| 1238 | } |
| 1239 | } |
| 1240 | } |
| 1241 | |
| 1242 | AVCodec ff_cavs_decoder = { |
| 1243 | .name = "cavs", |
| 1244 | .long_name = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"), |
| 1245 | .type = AVMEDIA_TYPE_VIDEO, |
| 1246 | .id = AV_CODEC_ID_CAVS, |
| 1247 | .priv_data_size = sizeof(AVSContext), |
| 1248 | .init = ff_cavs_init, |
| 1249 | .close = ff_cavs_end, |
| 1250 | .decode = cavs_decode_frame, |
| 1251 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_DELAY, |
| 1252 | .flush = cavs_flush, |
| 1253 | }; |