projects / libav.git / blame
| Commit | Line | Data |
|---|---|---|
| 437c2079 AJ |
1 | /** |
| 2 | * @file huffman.h | |
| 3 | * huffman tree builder and VLC generator | |
| 4 | * Copyright (C) 2007 Aurelien Jacobs <aurel@gnuage.org> | |
| 5 | * | |
| 6 | * This file is part of FFmpeg. | |
| 7 | * | |
| 8 | * FFmpeg is free software; you can redistribute it and/or | |
| 9 | * modify it under the terms of the GNU Lesser General Public | |
| 10 | * License as published by the Free Software Foundation; either | |
| 11 | * version 2.1 of the License, or (at your option) any later version. | |
| 12 | * | |
| 13 | * FFmpeg is distributed in the hope that it will be useful, | |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 16 | * Lesser General Public License for more details. | |
| 17 | * | |
| 18 | * You should have received a copy of the GNU Lesser General Public | |
| 19 | * License along with FFmpeg; if not, write to the Free Software | |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 21 | */ | |
| 22 | ||
| 23 | #ifndef AVCODEC_HUFFMAN_H | |
| 24 | #define AVCODEC_HUFFMAN_H | |
| 25 | ||
| 26 | #include "avcodec.h" | |
| 27 | ||
| 28 | typedef struct { | |
| 29 | int16_t sym; | |
| 30 | int16_t n0; | |
| 31 | uint32_t count; | |
| 32 | } Node; | |
| 33 | ||
| 34 | typedef int (*huff_cmp_t)(const void *va, const void *vb); | |
| 35 | int ff_huff_build_tree(AVCodecContext *avctx, VLC *vlc, int nb_codes, | |
| 36 | Node nodes[2*nb_codes], huff_cmp_t cmp, int hnode_first); | |
| 37 | ||
| 38 | #endif /* AVCODEC_HUFFMAN_H */ |