mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
5a582bd3b5
The function will be used by utvideo as well. Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/*
|
|
* Copyright (C) 2007 Aurelien Jacobs <aurel@gnuage.org>
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* huffman tree builder and VLC generator
|
|
*/
|
|
|
|
#ifndef AVCODEC_HUFFMAN_H
|
|
#define AVCODEC_HUFFMAN_H
|
|
|
|
#include "avcodec.h"
|
|
#include "get_bits.h"
|
|
|
|
typedef struct {
|
|
int16_t sym;
|
|
int16_t n0;
|
|
uint32_t count;
|
|
} Node;
|
|
|
|
#define FF_HUFFMAN_FLAG_HNODE_FIRST 0x01
|
|
#define FF_HUFFMAN_FLAG_ZERO_COUNT 0x02
|
|
|
|
typedef int (*HuffCmp)(const void *va, const void *vb);
|
|
int ff_huff_build_tree(AVCodecContext *avctx, VLC *vlc, int nb_codes,
|
|
Node *nodes, HuffCmp cmp, int flags);
|
|
|
|
void ff_huff_gen_len_table(uint8_t *dst, const uint64_t *stats);
|
|
|
|
#endif /* AVCODEC_HUFFMAN_H */
|