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1556186a
编写于
5月 24, 2011
作者:
A
Anton Khirnov
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电子邮件补丁
差异文件
fbdev: add a framerate private option.
上级
3e3db4d9
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
36 addition
and
12 deletion
+36
-12
libavdevice/fbdev.c
libavdevice/fbdev.c
+36
-12
未找到文件。
libavdevice/fbdev.c
浏览文件 @
1556186a
...
...
@@ -37,7 +37,10 @@
#include <time.h>
#include <linux/fb.h>
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavformat/avformat.h"
...
...
@@ -74,8 +77,10 @@ static enum PixelFormat get_pixfmt_from_fb_varinfo(struct fb_var_screeninfo *var
}
typedef
struct
{
AVClass
*
class
;
///< class for private options
int
frame_size
;
///< size in bytes of a grabbed frame
AVRational
time_base
;
///< time base
AVRational
fps
;
///< framerate
char
*
framerate
;
///< framerate string set by a private option
int64_t
time_frame
;
///< time for the next frame to output (in 1/1000000 units)
int
fd
;
///< framebuffer device file descriptor
...
...
@@ -97,16 +102,21 @@ av_cold static int fbdev_read_header(AVFormatContext *avctx,
enum
PixelFormat
pix_fmt
;
int
ret
,
flags
=
O_RDONLY
;
ret
=
av_parse_video_rate
(
&
fbdev
->
fps
,
fbdev
->
framerate
);
av_freep
(
&
fbdev
->
framerate
);
if
(
ret
<
0
)
{
av_log
(
avctx
,
AV_LOG_ERROR
,
"Couldn't parse framerate.
\n
"
);
return
ret
;
}
#if FF_API_FORMAT_PARAMETERS
if
(
ap
->
time_base
.
num
)
fbdev
->
fps
=
(
AVRational
){
ap
->
time_base
.
den
,
ap
->
time_base
.
num
};
#endif
if
(
!
(
st
=
av_new_stream
(
avctx
,
0
)))
return
AVERROR
(
ENOMEM
);
av_set_pts_info
(
st
,
64
,
1
,
1000000
);
/* 64 bits pts in microseconds */
if
(
ap
->
time_base
.
den
<=
0
)
{
av_log
(
avctx
,
AV_LOG_ERROR
,
"Invalid time base %d/%d
\n
"
,
ap
->
time_base
.
num
,
ap
->
time_base
.
den
);
return
AVERROR
(
EINVAL
);
}
/* NONBLOCK is ignored by the fbdev driver, only set for consistency */
if
(
avctx
->
flags
&
AVFMT_FLAG_NONBLOCK
)
flags
|=
O_NONBLOCK
;
...
...
@@ -146,7 +156,6 @@ av_cold static int fbdev_read_header(AVFormatContext *avctx,
fbdev
->
bytes_per_pixel
=
(
fbdev
->
varinfo
.
bits_per_pixel
+
7
)
>>
3
;
fbdev
->
frame_linesize
=
fbdev
->
width
*
fbdev
->
bytes_per_pixel
;
fbdev
->
frame_size
=
fbdev
->
frame_linesize
*
fbdev
->
heigth
;
fbdev
->
time_base
=
ap
->
time_base
;
fbdev
->
time_frame
=
AV_NOPTS_VALUE
;
fbdev
->
data
=
mmap
(
NULL
,
fbdev
->
fixinfo
.
smem_len
,
PROT_READ
,
MAP_SHARED
,
fbdev
->
fd
,
0
);
if
(
fbdev
->
data
==
MAP_FAILED
)
{
...
...
@@ -162,13 +171,13 @@ av_cold static int fbdev_read_header(AVFormatContext *avctx,
st
->
codec
->
pix_fmt
=
pix_fmt
;
st
->
codec
->
time_base
=
ap
->
time_base
;
st
->
codec
->
bit_rate
=
fbdev
->
width
*
fbdev
->
heigth
*
fbdev
->
bytes_per_pixel
/
av_q2d
(
ap
->
time_base
)
*
8
;
fbdev
->
width
*
fbdev
->
heigth
*
fbdev
->
bytes_per_pixel
*
av_q2d
(
fbdev
->
fps
)
*
8
;
av_log
(
avctx
,
AV_LOG_INFO
,
"w:%d h:%d bpp:%d pixfmt:%s
tb
:%d/%d bit_rate:%d
\n
"
,
"w:%d h:%d bpp:%d pixfmt:%s
fps
:%d/%d bit_rate:%d
\n
"
,
fbdev
->
width
,
fbdev
->
heigth
,
fbdev
->
varinfo
.
bits_per_pixel
,
av_pix_fmt_descriptors
[
pix_fmt
].
name
,
ap
->
time_base
.
num
,
ap
->
time_base
.
den
,
fbdev
->
fps
.
num
,
fbdev
->
fps
.
den
,
st
->
codec
->
bit_rate
);
return
0
;
...
...
@@ -202,7 +211,7 @@ static int fbdev_read_packet(AVFormatContext *avctx, AVPacket *pkt)
while
(
nanosleep
(
&
ts
,
&
ts
)
<
0
&&
errno
==
EINTR
);
}
/* compute the time of the next frame */
fbdev
->
time_frame
+=
INT64_C
(
1000000
)
*
av_q2d
(
fbdev
->
time_base
);
fbdev
->
time_frame
+=
INT64_C
(
1000000
)
/
av_q2d
(
fbdev
->
fps
);
if
((
ret
=
av_new_packet
(
pkt
,
fbdev
->
frame_size
))
<
0
)
return
ret
;
...
...
@@ -239,6 +248,20 @@ av_cold static int fbdev_read_close(AVFormatContext *avctx)
return
0
;
}
#define OFFSET(x) offsetof(FBDevContext, x)
#define DEC AV_OPT_FLAG_DECODING_PARAM
static
const
AVOption
options
[]
=
{
{
"framerate"
,
""
,
OFFSET
(
framerate
),
FF_OPT_TYPE_STRING
,
{.
str
=
"25"
},
0
,
0
,
DEC
},
{
NULL
},
};
static
const
AVClass
fbdev_class
=
{
.
class_name
=
"fbdev indev"
,
.
item_name
=
av_default_item_name
,
.
option
=
options
,
.
version
=
LIBAVUTIL_VERSION_INT
,
};
AVInputFormat
ff_fbdev_demuxer
=
{
.
name
=
"fbdev"
,
.
long_name
=
NULL_IF_CONFIG_SMALL
(
"Linux framebuffer"
),
...
...
@@ -247,4 +270,5 @@ AVInputFormat ff_fbdev_demuxer = {
.
read_packet
=
fbdev_read_packet
,
.
read_close
=
fbdev_read_close
,
.
flags
=
AVFMT_NOFILE
,
.
priv_class
=
&
fbdev_class
,
};
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