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Linshizhi
ffmpeg.wasm-core
Commits
b3da2692
Commit
b3da2692
authored
May 23, 2011
by
Anton Khirnov
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v4l2: add a private option for video standard.
parent
a861ffef
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Showing
1 changed file
with
28 additions
and
5 deletions
+28
-5
v4l2.c
libavdevice/v4l2.c
+28
-5
No files found.
libavdevice/v4l2.c
View file @
b3da2692
...
...
@@ -44,6 +44,8 @@
#include <time.h>
#include <strings.h>
#include "libavutil/imgutils.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
static
const
int
desired_video_buffers
=
256
;
...
...
@@ -54,6 +56,7 @@ enum io_method {
};
struct
video_data
{
AVClass
*
class
;
int
fd
;
int
frame_format
;
/* V4L2_PIX_FMT_* */
enum
io_method
io_method
;
...
...
@@ -64,6 +67,7 @@ struct video_data {
int
buffers
;
void
**
buf_start
;
unsigned
int
*
buf_len
;
char
*
standard
;
};
struct
buff_data
{
...
...
@@ -467,31 +471,37 @@ static int v4l2_set_parameters(AVFormatContext *s1, AVFormatParameters *ap)
}
if
(
ap
->
standard
)
{
av_freep
(
&
s
->
standard
);
s
->
standard
=
av_strdup
(
ap
->
standard
);
}
if
(
s
->
standard
)
{
av_log
(
s1
,
AV_LOG_DEBUG
,
"The V4L2 driver set standard: %s
\n
"
,
ap
->
standard
);
s
->
standard
);
/* set tv standard */
memset
(
&
standard
,
0
,
sizeof
(
standard
));
for
(
i
=
0
;;
i
++
)
{
standard
.
index
=
i
;
if
(
ioctl
(
s
->
fd
,
VIDIOC_ENUMSTD
,
&
standard
)
<
0
)
{
av_log
(
s1
,
AV_LOG_ERROR
,
"The V4L2 driver ioctl set standard(%s) failed
\n
"
,
ap
->
standard
);
s
->
standard
);
return
AVERROR
(
EIO
);
}
if
(
!
strcasecmp
(
standard
.
name
,
ap
->
standard
))
{
if
(
!
strcasecmp
(
standard
.
name
,
s
->
standard
))
{
break
;
}
}
av_log
(
s1
,
AV_LOG_DEBUG
,
"The V4L2 driver set standard: %s, id: %"
PRIu64
"
\n
"
,
ap
->
standard
,
(
uint64_t
)
standard
.
id
);
s
->
standard
,
(
uint64_t
)
standard
.
id
);
if
(
ioctl
(
s
->
fd
,
VIDIOC_S_STD
,
&
standard
.
id
)
<
0
)
{
av_log
(
s1
,
AV_LOG_ERROR
,
"The V4L2 driver ioctl set standard(%s) failed
\n
"
,
ap
->
standard
);
s
->
standard
);
return
AVERROR
(
EIO
);
}
}
av_freep
(
&
s
->
standard
);
if
(
ap
->
time_base
.
num
&&
ap
->
time_base
.
den
)
{
av_log
(
s1
,
AV_LOG_DEBUG
,
"Setting time per frame to %d/%d
\n
"
,
...
...
@@ -680,6 +690,18 @@ static int v4l2_read_close(AVFormatContext *s1)
return
0
;
}
static
const
AVOption
options
[]
=
{
{
"standard"
,
""
,
offsetof
(
struct
video_data
,
standard
),
FF_OPT_TYPE_STRING
,
{.
str
=
"NTSC"
},
0
,
0
,
AV_OPT_FLAG_DECODING_PARAM
},
{
NULL
},
};
static
const
AVClass
v4l2_class
=
{
.
class_name
=
"V4L2 indev"
,
.
item_name
=
av_default_item_name
,
.
option
=
options
,
.
version
=
LIBAVUTIL_VERSION_INT
,
};
AVInputFormat
ff_v4l2_demuxer
=
{
"video4linux2"
,
NULL_IF_CONFIG_SMALL
(
"Video4Linux2 device grab"
),
...
...
@@ -689,4 +711,5 @@ AVInputFormat ff_v4l2_demuxer = {
v4l2_read_packet
,
v4l2_read_close
,
.
flags
=
AVFMT_NOFILE
,
.
priv_class
=
&
v4l2_class
,
};
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