00001 /* 00002 * Copyright (C) 2007 Aurelien Jacobs <aurel@gnuage.org> 00003 * 00004 * This file is part of FFmpeg. 00005 * 00006 * FFmpeg is free software; you can redistribute it and/or 00007 * modify it under the terms of the GNU Lesser General Public 00008 * License as published by the Free Software Foundation; either 00009 * version 2.1 of the License, or (at your option) any later version. 00010 * 00011 * FFmpeg is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 * Lesser General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU Lesser General Public 00017 * License along with FFmpeg; if not, write to the Free Software 00018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00019 */ 00020 00026 #ifndef AVCODEC_HUFFMAN_H 00027 #define AVCODEC_HUFFMAN_H 00028 00029 #include "avcodec.h" 00030 #include "get_bits.h" 00031 00032 typedef struct { 00033 int16_t sym; 00034 int16_t n0; 00035 uint32_t count; 00036 } Node; 00037 00038 #define FF_HUFFMAN_FLAG_HNODE_FIRST 0x01 00039 #define FF_HUFFMAN_FLAG_ZERO_COUNT 0x02 00040 00041 typedef int (*HuffCmp)(const void *va, const void *vb); 00042 int ff_huff_build_tree(AVCodecContext *avctx, VLC *vlc, int nb_codes, 00043 Node *nodes, HuffCmp cmp, int flags); 00044 00045 void ff_huff_gen_len_table(uint8_t *dst, const uint64_t *stats); 00046 00047 #endif /* AVCODEC_HUFFMAN_H */
1.5.8