[libav.git] / libavcodec / huffman.h

/**
 * @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;

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 hnode_first);

#endif /* FFMPEG_HUFFMAN_H */
Commit	Line	Data
	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 FFMPEG_HUFFMAN_H
	24	#define FFMPEG_HUFFMAN_H
	25
	26	#include "avcodec.h"
	27	#include "bitstream.h"
	28
	29	typedef struct {
	30	int16_t sym;
	31	int16_t n0;
	32	uint32_t count;
	33	} Node;
	34
	35	typedef int (huff_cmp_t)(const void va, const void *vb);
	36	int ff_huff_build_tree(AVCodecContext avctx, VLC vlc, int nb_codes,
	37	Node *nodes, huff_cmp_t cmp, int hnode_first);
	38
	39	#endif /* FFMPEG_HUFFMAN_H */