FFmpeg
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/error.h
"
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#include "
libavutil/intreadwrite.h
"
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#include "
libavutil/macros.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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}
WvHeader::total_samples
uint32_t total_samples
Definition:
wv.h:37
WV_FLAG_INITIAL_BLOCK
#define WV_FLAG_INITIAL_BLOCK
Definition:
wv.h:28
WV_BLOCK_LIMIT
#define WV_BLOCK_LIMIT
Definition:
wv.h:32
WvHeader::samples
uint32_t samples
Definition:
wv.h:39
data
const char data[16]
Definition:
mxf.c:146
WvHeader
Definition:
wv.h:34
macros.h
WvHeader::block_idx
uint32_t block_idx
Definition:
wv.h:38
WvHeader::blocksize
uint32_t blocksize
Definition:
wv.h:35
intreadwrite.h
AV_RL16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition:
bytestream.h:94
WV_FLAG_FINAL_BLOCK
#define WV_FLAG_FINAL_BLOCK
Definition:
wv.h:29
error.h
ff_wv_parse_header
int ff_wv_parse_header(WvHeader *wv, const uint8_t *data)
Parse a WavPack block header.
Definition:
wv.c:30
WvHeader::initial
int initial
Definition:
wv.h:43
WvHeader::flags
uint32_t flags
Definition:
wv.h:40
WvHeader::version
uint16_t version
Definition:
wv.h:36
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition:
bytestream.h:92
wv.h
WvHeader::final
int final
Definition:
wv.h:43
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition:
error.h:61
MKTAG
#define MKTAG(a, b, c, d)
Definition:
macros.h:55
WvHeader::crc
uint32_t crc
Definition:
wv.h:41
Generated on Tue Feb 28 2023 21:34:11 for FFmpeg by
1.8.17