aac5773f
 hucm
功能基本完成，接口待打磨
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
/*
* Snappy module
* Copyright (c) Luca Barbato
*
* 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
* Snappy decompression
*
* Snappy is a compression/decompression algorithm that does not aim for
* maximum compression, but rather for very high speeds and reasonable
* compression.
*
* http://en.wikipedia.org/wiki/Snappy_%28software%29
*/
#ifndef AVCODEC_SNAPPY_H
#define AVCODEC_SNAPPY_H
#include <stdint.h>
#include "bytestream.h"
/**
* Get the uncompressed length of an input buffer compressed using the Snappy
* algorithm. The GetByteContext is not advanced.
*
* @param gb input GetByteContext.
* @return A positive length on success, AVERROR otherwise.
*/
int64_t ff_snappy_peek_uncompressed_length(GetByteContext *gb);
/**
* Decompress an input buffer using Snappy algorithm.
*
* @param gb input GetByteContext.
* @param buf input buffer pointer.
* @param size input/output on input, the size of buffer, on output, the size
* of the uncompressed data.
* @return 0 if success, AVERROR otherwise.
*/
int ff_snappy_uncompress(GetByteContext *gb, uint8_t *buf, int64_t *size);
#endif /* AVCODEC_SNAPPY_H */
|
