FFmpeg
wv.h
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1 /*
2  * WavPack shared functions
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVFORMAT_WV_H
22 #define AVFORMAT_WV_H
23 
24 #include <stdint.h>
25 
26 #define WV_HEADER_SIZE 32
27 
28 #define WV_FLAG_INITIAL_BLOCK (1 << 11)
29 #define WV_FLAG_FINAL_BLOCK (1 << 12)
30 
31 // specs say that maximum block size is 1Mb
32 #define WV_BLOCK_LIMIT 1048576
33 
34 typedef struct WvHeader {
35  uint32_t blocksize; //< size of the block data (excluding the header)
36  uint16_t version; //< bitstream version
37  uint32_t total_samples; //< total number of samples in the stream
38  uint32_t block_idx; //< index of the first sample in this block
39  uint32_t samples; //< number of samples in this block
40  uint32_t flags;
41  uint32_t crc;
42 
43  int initial, final;
44 } WvHeader;
45 
46 /**
47  * Parse a WavPack block header.
48  *
49  * @param wv this struct will be filled with parse header information
50  * @param data header data, must be WV_HEADER_SIZE bytes long
51  *
52  * @return 0 on success, a negative AVERROR code on failure
53  */
54 int ff_wv_parse_header(WvHeader *wv, const uint8_t *data);
55 
56 #endif /* AVFORMAT_WV_H */
uint32_t samples
Definition: wv.h:39
int initial
Definition: wv.h:43
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
uint8_t
uint32_t flags
Definition: wv.h:40
int ff_wv_parse_header(WvHeader *wv, const uint8_t *data)
Parse a WavPack block header.
Definition: wv.c:29
Definition: wv.h:34
uint32_t crc
Definition: wv.h:41
uint16_t version
Definition: wv.h:36
uint32_t total_samples
Definition: wv.h:37
uint32_t block_idx
Definition: wv.h:38
uint32_t blocksize
Definition: wv.h:35