2 * WavPack shared functions
4 * This file is part of FFmpeg.
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.
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.
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
24 #include "libavutil/common.h"
25 #include "libavutil/intreadwrite.h"
29 int ff_wv_parse_header(WvHeader
*wv
, const uint8_t *data
)
31 memset(wv
, 0, sizeof(*wv
));
33 if (AV_RL32(data
) != MKTAG('w', 'v', 'p', 'k'))
34 return AVERROR_INVALIDDATA
;
36 wv
->blocksize
= AV_RL32(data
+ 4);
37 if (wv
->blocksize
< 24 || wv
->blocksize
> WV_BLOCK_LIMIT
)
38 return AVERROR_INVALIDDATA
;
41 wv
->version
= AV_RL16(data
+ 8);
42 wv
->total_samples
= AV_RL32(data
+ 12);
43 wv
->block_idx
= AV_RL32(data
+ 16);
44 wv
->samples
= AV_RL32(data
+ 20);
45 wv
->flags
= AV_RL32(data
+ 24);
46 wv
->crc
= AV_RL32(data
+ 28);
48 wv
->initial
= !!(wv
->flags
& WV_FLAG_INITIAL_BLOCK
);
49 wv
->final
= !!(wv
->flags
& WV_FLAG_FINAL_BLOCK
);