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