mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.6 KiB
53 lines
1.6 KiB
12 years ago
|
/*
|
||
|
|
* WavPack shared functions
|
||
|
|
*
|
||
|
|
* This file is part of Libav.
|
||
|
|
*
|
||
|
|
* Libav 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.
|
||
|
|
*
|
||
|
|
* Libav 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 Libav; 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;
|
||
|
|
}
|