blob: 42ccddf3fc6e57ade2439c616d3a7eae4d83bdfe
| 1 | /* |
| 2 | * This file is part of FFmpeg. |
| 3 | * |
| 4 | * FFmpeg is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU Lesser General Public |
| 6 | * License as published by the Free Software Foundation; either |
| 7 | * version 2.1 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * FFmpeg is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | * Lesser General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public |
| 15 | * License along with FFmpeg; if not, write to the Free Software |
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | */ |
| 18 | |
| 19 | #ifndef AVCODEC_VLC_H |
| 20 | #define AVCODEC_VLC_H |
| 21 | |
| 22 | #include <stdint.h> |
| 23 | |
| 24 | #define VLC_TYPE int16_t |
| 25 | |
| 26 | typedef struct VLC { |
| 27 | int bits; |
| 28 | VLC_TYPE (*table)[2]; ///< code, bits |
| 29 | int table_size, table_allocated; |
| 30 | } VLC; |
| 31 | |
| 32 | typedef struct RL_VLC_ELEM { |
| 33 | int16_t level; |
| 34 | int8_t len; |
| 35 | uint8_t run; |
| 36 | } RL_VLC_ELEM; |
| 37 | |
| 38 | #define init_vlc(vlc, nb_bits, nb_codes, \ |
| 39 | bits, bits_wrap, bits_size, \ |
| 40 | codes, codes_wrap, codes_size, \ |
| 41 | flags) \ |
| 42 | ff_init_vlc_sparse(vlc, nb_bits, nb_codes, \ |
| 43 | bits, bits_wrap, bits_size, \ |
| 44 | codes, codes_wrap, codes_size, \ |
| 45 | NULL, 0, 0, flags) |
| 46 | |
| 47 | int ff_init_vlc_sparse(VLC *vlc, int nb_bits, int nb_codes, |
| 48 | const void *bits, int bits_wrap, int bits_size, |
| 49 | const void *codes, int codes_wrap, int codes_size, |
| 50 | const void *symbols, int symbols_wrap, int symbols_size, |
| 51 | int flags); |
| 52 | void ff_free_vlc(VLC *vlc); |
| 53 | |
| 54 | #define INIT_VLC_LE 2 |
| 55 | #define INIT_VLC_USE_NEW_STATIC 4 |
| 56 | |
| 57 | #define INIT_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, h, i, j, static_size) \ |
| 58 | do { \ |
| 59 | static VLC_TYPE table[static_size][2]; \ |
| 60 | (vlc)->table = table; \ |
| 61 | (vlc)->table_allocated = static_size; \ |
| 62 | ff_init_vlc_sparse(vlc, bits, a, b, c, d, e, f, g, h, i, j, \ |
| 63 | INIT_VLC_USE_NEW_STATIC); \ |
| 64 | } while (0) |
| 65 | |
| 66 | #define INIT_LE_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, h, i, j, static_size) \ |
| 67 | do { \ |
| 68 | static VLC_TYPE table[static_size][2]; \ |
| 69 | (vlc)->table = table; \ |
| 70 | (vlc)->table_allocated = static_size; \ |
| 71 | ff_init_vlc_sparse(vlc, bits, a, b, c, d, e, f, g, h, i, j, \ |
| 72 | INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE); \ |
| 73 | } while (0) |
| 74 | |
| 75 | #define INIT_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size) \ |
| 76 | INIT_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, NULL, 0, 0, static_size) |
| 77 | |
| 78 | #define INIT_LE_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size) \ |
| 79 | INIT_LE_VLC_SPARSE_STATIC(vlc, bits, a, b, c, d, e, f, g, NULL, 0, 0, static_size) |
| 80 | |
| 81 | #endif /* AVCODEC_VLC_H */ |
| 82 |