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libavformat
wv.c
Go to the documentation of this file.
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/*
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* WavPack shared functions
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdint.h>
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#include <string.h>
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#include "
libavutil/common.h
"
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#include "
libavutil/intreadwrite.h
"
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#include "
wv.h
"
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int
ff_wv_parse_header
(
WvHeader
*wv,
const
uint8_t
*
data
)
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{
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memset(wv, 0,
sizeof
(*wv));
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if
(
AV_RL32
(data) !=
MKTAG
(
'w'
,
'v'
,
'p'
,
'k'
))
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return
AVERROR_INVALIDDATA
;
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wv->
blocksize
=
AV_RL32
(data + 4);
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if
(wv->
blocksize
< 24 || wv->
blocksize
>
WV_BLOCK_LIMIT
)
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return
AVERROR_INVALIDDATA
;
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wv->
blocksize
-= 24;
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wv->
version
=
AV_RL16
(data + 8);
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wv->
total_samples
=
AV_RL32
(data + 12);
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wv->
block_idx
=
AV_RL32
(data + 16);
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wv->
samples
=
AV_RL32
(data + 20);
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wv->
flags
=
AV_RL32
(data + 24);
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wv->
crc
=
AV_RL32
(data + 28);
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wv->
initial
= !!(wv->
flags
&
WV_FLAG_INITIAL_BLOCK
);
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wv->
final
= !!(wv->
flags
&
WV_FLAG_FINAL_BLOCK
);
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return
0;
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}
Generated on Sun Mar 23 2014 23:50:14 for FFmpeg by
1.8.2