Commit | Line | Data |
---|---|---|
2ba45a60 DM |
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 */ |