repositories / deb_ffmpeg.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ba45a60 DM |
1 | /* |
| 2 | * Copyright (C) 2007 Aurelien Jacobs <aurel@gnuage.org> | |
| 3 | * | |
| 4 | * This file is part of FFmpeg. | |
| 5 | * | |
| 6 | * FFmpeg is free software; you can redistribute it and/or | |
| 7 | * modify it under the terms of the GNU Lesser General Public | |
| 8 | * License as published by the Free Software Foundation; either | |
| 9 | * version 2.1 of the License, or (at your option) any later version. | |
| 10 | * | |
| 11 | * FFmpeg is distributed in the hope that it will be useful, | |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | * Lesser General Public License for more details. | |
| 15 | * | |
| 16 | * You should have received a copy of the GNU Lesser General Public | |
| 17 | * License along with FFmpeg; if not, write to the Free Software | |
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 19 | */ | |
| 20 | ||
| 21 | /** | |
| 22 | * @file | |
| 23 | * huffman tree builder and VLC generator | |
| 24 | */ | |
| 25 | ||
| 26 | #ifndef AVCODEC_HUFFMAN_H | |
| 27 | #define AVCODEC_HUFFMAN_H | |
| 28 | ||
| 29 | #include "avcodec.h" | |
| 30 | #include "get_bits.h" | |
| 31 | ||
| 32 | typedef struct Node { | |
| 33 | int16_t sym; | |
| 34 | int16_t n0; | |
| 35 | uint32_t count; | |
| 36 | } Node; | |
| 37 | ||
| 38 | #define FF_HUFFMAN_FLAG_HNODE_FIRST 0x01 | |
| 39 | #define FF_HUFFMAN_FLAG_ZERO_COUNT 0x02 | |
| 40 | #define FF_HUFFMAN_BITS 10 | |
| 41 | ||
| 42 | typedef int (*HuffCmp)(const void *va, const void *vb); | |
| 43 | int ff_huff_build_tree(AVCodecContext *avctx, VLC *vlc, int nb_codes, int nb_bits, | |
| 44 | Node *nodes, HuffCmp cmp, int flags); | |
| 45 | ||
| 46 | int ff_huff_gen_len_table(uint8_t *dst, const uint64_t *stats, int n, int skip0); | |
| 47 | ||
| 48 | #endif /* AVCODEC_HUFFMAN_H */ |