mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-27 13:10:37 +00:00
bcafc41a5a
* commit 'ffa190d0479d2370dd89c95692f822cbff2cc24c': Move VLC and RL_VLC_ELEM structure definitions to a separate header Merged-by: Clément Bœsch <u@pkh.me>
49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* huffman tree builder and VLC generator
|
|
*/
|
|
|
|
#ifndef AVCODEC_HUFFMAN_H
|
|
#define AVCODEC_HUFFMAN_H
|
|
|
|
#include "avcodec.h"
|
|
#include "vlc.h"
|
|
|
|
typedef struct Node {
|
|
int16_t sym;
|
|
int16_t n0;
|
|
uint32_t count;
|
|
} Node;
|
|
|
|
#define FF_HUFFMAN_FLAG_HNODE_FIRST 0x01
|
|
#define FF_HUFFMAN_FLAG_ZERO_COUNT 0x02
|
|
#define FF_HUFFMAN_BITS 10
|
|
|
|
typedef int (*HuffCmp)(const void *va, const void *vb);
|
|
int ff_huff_build_tree(AVCodecContext *avctx, VLC *vlc, int nb_codes, int nb_bits,
|
|
Node *nodes, HuffCmp cmp, int flags);
|
|
|
|
int ff_huff_gen_len_table(uint8_t *dst, const uint64_t *stats, int n, int skip0);
|
|
|
|
#endif /* AVCODEC_HUFFMAN_H */
|