2 * Copyright (C) 2007 Aurelien Jacobs <aurel@gnuage.org>
4 * This file is part of FFmpeg.
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.
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.
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
23 * huffman tree builder and VLC generator
26 #ifndef AVCODEC_HUFFMAN_H
27 #define AVCODEC_HUFFMAN_H
38 #define FF_HUFFMAN_FLAG_HNODE_FIRST 0x01
39 #define FF_HUFFMAN_FLAG_ZERO_COUNT 0x02
40 #define FF_HUFFMAN_BITS 10
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
);
46 int ff_huff_gen_len_table(uint8_t *dst
, const uint64_t *stats
, int n
, int skip0
);
48 #endif /* AVCODEC_HUFFMAN_H */