blob: 07d2e1bc0a8caddd8828b9dca4cbb61a76cc3a72
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 */ |
57 |