| Line | Branch | Exec | Source |
|---|---|---|---|
| 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 | #include <stdint.h> | ||
| 22 | #include <string.h> | ||
| 23 | |||
| 24 | #include "libavutil/error.h" | ||
| 25 | #include "libavutil/intreadwrite.h" | ||
| 26 | #include "libavutil/macros.h" | ||
| 27 | |||
| 28 | #include "wv.h" | ||
| 29 | |||
| 30 | 8510 | int ff_wv_parse_header(WvHeader *wv, const uint8_t *data) | |
| 31 | { | ||
| 32 | 8510 | memset(wv, 0, sizeof(*wv)); | |
| 33 | |||
| 34 |
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8510 | if (AV_RL32(data) != MKTAG('w', 'v', 'p', 'k')) |
| 35 | ✗ | return AVERROR_INVALIDDATA; | |
| 36 | |||
| 37 | 8510 | wv->blocksize = AV_RL32(data + 4); | |
| 38 |
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8510 | if (wv->blocksize < 24 || wv->blocksize > WV_BLOCK_LIMIT) |
| 39 | ✗ | return AVERROR_INVALIDDATA; | |
| 40 | 8510 | wv->blocksize -= 24; | |
| 41 | |||
| 42 | 8510 | wv->version = AV_RL16(data + 8); | |
| 43 | 8510 | wv->total_samples = AV_RL32(data + 12); | |
| 44 | 8510 | wv->block_idx = AV_RL32(data + 16); | |
| 45 | 8510 | wv->samples = AV_RL32(data + 20); | |
| 46 | 8510 | wv->flags = AV_RL32(data + 24); | |
| 47 | 8510 | wv->crc = AV_RL32(data + 28); | |
| 48 | |||
| 49 | 8510 | wv->initial = !!(wv->flags & WV_FLAG_INITIAL_BLOCK); | |
| 50 | 8510 | wv->final = !!(wv->flags & WV_FLAG_FINAL_BLOCK); | |
| 51 | |||
| 52 | 8510 | return 0; | |
| 53 | } | ||
| 54 |