0,0 → 1,52 |
/* |
* WavPack shared functions |
* |
* This file is part of FFmpeg. |
* |
* FFmpeg is free software; you can redistribute it and/or |
* modify it under the terms of the GNU Lesser General Public |
* License as published by the Free Software Foundation; either |
* version 2.1 of the License, or (at your option) any later version. |
* |
* FFmpeg is distributed in the hope that it will be useful, |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
* Lesser General Public License for more details. |
* |
* You should have received a copy of the GNU Lesser General Public |
* License along with FFmpeg; if not, write to the Free Software |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
*/ |
|
#include <stdint.h> |
#include <string.h> |
|
#include "libavutil/common.h" |
#include "libavutil/intreadwrite.h" |
|
#include "wv.h" |
|
int ff_wv_parse_header(WvHeader *wv, const uint8_t *data) |
{ |
memset(wv, 0, sizeof(*wv)); |
|
if (AV_RL32(data) != MKTAG('w', 'v', 'p', 'k')) |
return AVERROR_INVALIDDATA; |
|
wv->blocksize = AV_RL32(data + 4); |
if (wv->blocksize < 24 || wv->blocksize > WV_BLOCK_LIMIT) |
return AVERROR_INVALIDDATA; |
wv->blocksize -= 24; |
|
wv->version = AV_RL16(data + 8); |
wv->total_samples = AV_RL32(data + 12); |
wv->block_idx = AV_RL32(data + 16); |
wv->samples = AV_RL32(data + 20); |
wv->flags = AV_RL32(data + 24); |
wv->crc = AV_RL32(data + 28); |
|
wv->initial = !!(wv->flags & WV_FLAG_INITIAL_BLOCK); |
wv->final = !!(wv->flags & WV_FLAG_FINAL_BLOCK); |
|
return 0; |
} |