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2f222b95
编写于
6月 18, 2011
作者:
S
Stefano Sabatini
浏览文件
操作
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电子邮件补丁
差异文件
lavfi: add testsrc source
上级
5c13b5bb
变更
5
隐藏空白更改
内联
并排
Showing
5 changed file
with
384 addition
and
1 deletion
+384
-1
doc/filters.texi
doc/filters.texi
+43
-0
libavfilter/Makefile
libavfilter/Makefile
+1
-0
libavfilter/allfilters.c
libavfilter/allfilters.c
+1
-0
libavfilter/avfilter.h
libavfilter/avfilter.h
+1
-1
libavfilter/vsrc_testsrc.c
libavfilter/vsrc_testsrc.c
+338
-0
未找到文件。
doc/filters.texi
浏览文件 @
2f222b95
...
...
@@ -1970,6 +1970,49 @@ Some examples follow:
frei0r_src=200x200:10:partik0l=1234 [overlay]; [in][overlay] overlay
@end example
@section testsrc
Generate a test video pattern, showing a color pattern, a scrolling
gradient and a timestamp. This is mainly intended for testing
purposes.
It accepts an optional sequence of @var{key}=@var{value} pairs,
separated by ":". The description of the accepted options follows.
@table @option
@item size, s
Specify the size of the sourced video, it may be a string of the form
@var{width}x@var{heigth}, or the name of a size abbreviation. The
default value is "320x240".
@item rate, r
Specify the frame rate of the sourced video, as the number of frames
generated per second. It has to be a string in the format
@var{frame_rate_num}/@var{frame_rate_den}, an integer number, a float
number or a valid video frame rate abbreviation. The default value is
"25".
@item duration
Set the video duration of the sourced video. The accepted syntax is:
@example
[-]HH[:MM[:SS[.m...]]]
[-]S+[.m...]
@end example
See also the function @code{av_parse_time()}.
If not specified, or the expressed duration is negative, the video is
supposed to be generated forever.
@end table
For example the following:
@example
testsrc=duration=5.3:size=qcif:rate=10
@end example
will generate a video with a duration of 5.3 seconds, with size
176x144 and a framerate of 10 frames per second.
@c man end VIDEO SOURCES
@chapter Video Sinks
...
...
libavfilter/Makefile
浏览文件 @
2f222b95
...
...
@@ -68,6 +68,7 @@ OBJS-$(CONFIG_COLOR_FILTER) += vsrc_color.o
OBJS-$(CONFIG_FREI0R_SRC_FILTER)
+=
vf_frei0r.o
OBJS-$(CONFIG_MOVIE_FILTER)
+=
vsrc_movie.o
OBJS-$(CONFIG_NULLSRC_FILTER)
+=
vsrc_nullsrc.o
OBJS-$(CONFIG_TESTSRC_FILTER)
+=
vsrc_testsrc.o
OBJS-$(CONFIG_BUFFERSINK_FILTER)
+=
vsink_buffer.o
OBJS-$(CONFIG_NULLSINK_FILTER)
+=
vsink_nullsink.o
...
...
libavfilter/allfilters.c
浏览文件 @
2f222b95
...
...
@@ -84,6 +84,7 @@ void avfilter_register_all(void)
REGISTER_FILTER
(
FREI0R
,
frei0r_src
,
vsrc
);
REGISTER_FILTER
(
MOVIE
,
movie
,
vsrc
);
REGISTER_FILTER
(
NULLSRC
,
nullsrc
,
vsrc
);
REGISTER_FILTER
(
TESTSRC
,
testsrc
,
vsrc
);
REGISTER_FILTER
(
BUFFER
,
buffersink
,
vsink
);
REGISTER_FILTER
(
NULLSINK
,
nullsink
,
vsink
);
...
...
libavfilter/avfilter.h
浏览文件 @
2f222b95
...
...
@@ -26,7 +26,7 @@
#include "libavutil/samplefmt.h"
#define LIBAVFILTER_VERSION_MAJOR 2
#define LIBAVFILTER_VERSION_MINOR 2
3
#define LIBAVFILTER_VERSION_MINOR 2
4
#define LIBAVFILTER_VERSION_MICRO 0
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
...
...
libavfilter/vsrc_testsrc.c
0 → 100644
浏览文件 @
2f222b95
/*
* Copyright (c) 2007 Nicolas George <nicolas.george@normalesup.org>
* Copyright (c) 2011 Stefano Sabatini
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* Based on the test pattern generator demuxer by Nicolas George:
* http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2007-October/037845.html
*/
#include <float.h>
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "avfilter.h"
typedef
struct
{
const
AVClass
*
class
;
int
h
,
w
;
unsigned
int
nb_frame
;
AVRational
time_base
;
int64_t
pts
,
max_pts
;
char
*
size
;
///< video frame size
char
*
rate
;
///< video frame rate
char
*
duration
;
///< total duration of the generated video
}
TestSourceContext
;
#define OFFSET(x) offsetof(TestSourceContext, x)
static
const
AVOption
testsrc_options
[]
=
{
{
"size"
,
"set video size"
,
OFFSET
(
size
),
FF_OPT_TYPE_STRING
,
{.
str
=
"320x240"
},
0
,
0
},
{
"s"
,
"set video size"
,
OFFSET
(
size
),
FF_OPT_TYPE_STRING
,
{.
str
=
"320x240"
},
0
,
0
},
{
"rate"
,
"set video rate"
,
OFFSET
(
rate
),
FF_OPT_TYPE_STRING
,
{.
str
=
"25"
},
0
,
0
},
{
"r"
,
"set video rate"
,
OFFSET
(
rate
),
FF_OPT_TYPE_STRING
,
{.
str
=
"25"
},
0
,
0
},
{
"duration"
,
"set video duration"
,
OFFSET
(
duration
),
FF_OPT_TYPE_STRING
,
{.
str
=
NULL
},
0
,
0
},
{
NULL
},
};
static
const
char
*
testsrc_get_name
(
void
*
ctx
)
{
return
"testsrc"
;
}
static
const
AVClass
testsrc_class
=
{
"TestSourceContext"
,
testsrc_get_name
,
testsrc_options
};
static
av_cold
int
init
(
AVFilterContext
*
ctx
,
const
char
*
args
,
void
*
opaque
)
{
TestSourceContext
*
test
=
ctx
->
priv
;
AVRational
frame_rate_q
;
int64_t
duration
=
-
1
;
int
ret
=
0
;
test
->
class
=
&
testsrc_class
;
av_opt_set_defaults2
(
test
,
0
,
0
);
if
((
ret
=
(
av_set_options_string
(
test
,
args
,
"="
,
":"
)))
<
0
)
{
av_log
(
ctx
,
AV_LOG_ERROR
,
"Error parsing options string: '%s'
\n
"
,
args
);
return
ret
;
}
if
((
ret
=
av_parse_video_size
(
&
test
->
w
,
&
test
->
h
,
test
->
size
))
<
0
)
{
av_log
(
ctx
,
AV_LOG_ERROR
,
"Invalid frame size: '%s'
\n
"
,
test
->
size
);
return
ret
;
}
if
((
ret
=
av_parse_video_rate
(
&
frame_rate_q
,
test
->
rate
))
<
0
||
frame_rate_q
.
den
<=
0
||
frame_rate_q
.
num
<=
0
)
{
av_log
(
ctx
,
AV_LOG_ERROR
,
"Invalid frame rate: '%s'
\n
"
,
test
->
rate
);
return
ret
;
}
if
((
test
->
duration
)
&&
(
ret
=
av_parse_time
(
&
duration
,
test
->
duration
,
1
))
<
0
)
{
av_log
(
ctx
,
AV_LOG_ERROR
,
"Invalid duration: '%s'
\n
"
,
test
->
duration
);
return
ret
;
}
test
->
time_base
.
num
=
frame_rate_q
.
den
;
test
->
time_base
.
den
=
frame_rate_q
.
num
;
test
->
max_pts
=
duration
>=
0
?
av_rescale_q
(
duration
,
AV_TIME_BASE_Q
,
test
->
time_base
)
:
-
1
;
test
->
nb_frame
=
0
;
test
->
pts
=
0
;
av_log
(
ctx
,
AV_LOG_INFO
,
"size:%dx%d rate:%d/%d duration:%f
\n
"
,
test
->
w
,
test
->
h
,
frame_rate_q
.
num
,
frame_rate_q
.
den
,
duration
<
0
?
-
1
:
test
->
max_pts
*
av_q2d
(
test
->
time_base
));
return
0
;
}
static
int
config_props
(
AVFilterLink
*
outlink
)
{
TestSourceContext
*
test
=
outlink
->
src
->
priv
;
outlink
->
w
=
test
->
w
;
outlink
->
h
=
test
->
h
;
outlink
->
time_base
=
test
->
time_base
;
return
0
;
}
/**
* Fill a rectangle with value val.
*
* @param val the RGB value to set
* @param dst pointer to the destination buffer to fill
* @param dst_linesize linesize of destination
* @param segment_width width of the segment
* @param x horizontal coordinate where to draw the rectangle in the destination buffer
* @param y horizontal coordinate where to draw the rectangle in the destination buffer
* @param w width of the rectangle to draw, expressed as a number of segment_width units
* @param h height of the rectangle to draw, expressed as a number of segment_width units
*/
static
void
draw_rectangle
(
unsigned
val
,
uint8_t
*
dst
,
int
dst_linesize
,
unsigned
segment_width
,
unsigned
x
,
unsigned
y
,
unsigned
w
,
unsigned
h
)
{
int
i
;
int
step
=
3
;
dst
+=
segment_width
*
(
step
*
x
+
y
*
dst_linesize
);
w
*=
segment_width
*
step
;
h
*=
segment_width
;
for
(
i
=
0
;
i
<
h
;
i
++
)
{
memset
(
dst
,
val
,
w
);
dst
+=
dst_linesize
;
}
}
static
void
draw_digit
(
int
digit
,
uint8_t
*
dst
,
unsigned
dst_linesize
,
unsigned
segment_width
)
{
#define TOP_HBAR 1
#define MID_HBAR 2
#define BOT_HBAR 4
#define LEFT_TOP_VBAR 8
#define LEFT_BOT_VBAR 16
#define RIGHT_TOP_VBAR 32
#define RIGHT_BOT_VBAR 64
struct
{
int
x
,
y
,
w
,
h
;
}
segments
[]
=
{
{
1
,
0
,
5
,
1
},
/* TOP_HBAR */
{
1
,
6
,
5
,
1
},
/* MID_HBAR */
{
1
,
12
,
5
,
1
},
/* BOT_HBAR */
{
0
,
1
,
1
,
5
},
/* LEFT_TOP_VBAR */
{
0
,
7
,
1
,
5
},
/* LEFT_BOT_VBAR */
{
6
,
1
,
1
,
5
},
/* RIGHT_TOP_VBAR */
{
6
,
7
,
1
,
5
}
/* RIGHT_BOT_VBAR */
};
static
const
unsigned
char
masks
[
10
]
=
{
/* 0 */
TOP_HBAR
|
BOT_HBAR
|
LEFT_TOP_VBAR
|
LEFT_BOT_VBAR
|
RIGHT_TOP_VBAR
|
RIGHT_BOT_VBAR
,
/* 1 */
RIGHT_TOP_VBAR
|
RIGHT_BOT_VBAR
,
/* 2 */
TOP_HBAR
|
MID_HBAR
|
BOT_HBAR
|
LEFT_BOT_VBAR
|
RIGHT_TOP_VBAR
,
/* 3 */
TOP_HBAR
|
MID_HBAR
|
BOT_HBAR
|
RIGHT_TOP_VBAR
|
RIGHT_BOT_VBAR
,
/* 4 */
MID_HBAR
|
LEFT_TOP_VBAR
|
RIGHT_TOP_VBAR
|
RIGHT_BOT_VBAR
,
/* 5 */
TOP_HBAR
|
BOT_HBAR
|
MID_HBAR
|
LEFT_TOP_VBAR
|
RIGHT_BOT_VBAR
,
/* 6 */
TOP_HBAR
|
BOT_HBAR
|
MID_HBAR
|
LEFT_TOP_VBAR
|
LEFT_BOT_VBAR
|
RIGHT_BOT_VBAR
,
/* 7 */
TOP_HBAR
|
RIGHT_TOP_VBAR
|
RIGHT_BOT_VBAR
,
/* 8 */
TOP_HBAR
|
BOT_HBAR
|
MID_HBAR
|
LEFT_TOP_VBAR
|
LEFT_BOT_VBAR
|
RIGHT_TOP_VBAR
|
RIGHT_BOT_VBAR
,
/* 9 */
TOP_HBAR
|
BOT_HBAR
|
MID_HBAR
|
LEFT_TOP_VBAR
|
RIGHT_TOP_VBAR
|
RIGHT_BOT_VBAR
,
};
unsigned
mask
=
masks
[
digit
];
int
i
;
draw_rectangle
(
0
,
dst
,
dst_linesize
,
segment_width
,
0
,
0
,
8
,
13
);
for
(
i
=
0
;
i
<
FF_ARRAY_ELEMS
(
segments
);
i
++
)
if
(
mask
&
(
1
<<
i
))
draw_rectangle
(
255
,
dst
,
dst_linesize
,
segment_width
,
segments
[
i
].
x
,
segments
[
i
].
y
,
segments
[
i
].
w
,
segments
[
i
].
h
);
}
#define GRADIENT_SIZE (6 * 256)
static
void
fill_picture
(
TestSourceContext
*
test
,
AVFilterBufferRef
*
picref
)
{
uint8_t
*
p
,
*
p0
;
int
x
,
y
;
int
color
,
color_rest
;
int
icolor
;
int
radius
;
int
quad0
,
quad
;
int
dquad_x
,
dquad_y
;
int
grad
,
dgrad
,
rgrad
,
drgrad
;
int
seg_size
;
int
second
;
int
i
;
uint8_t
*
data
=
picref
->
data
[
0
];
int
width
=
picref
->
video
->
w
;
int
height
=
picref
->
video
->
h
;
/* draw colored bars and circle */
radius
=
(
width
+
height
)
/
4
;
quad0
=
width
*
width
/
4
+
height
*
height
/
4
-
radius
*
radius
;
dquad_y
=
1
-
height
;
p0
=
data
;
for
(
y
=
0
;
y
<
height
;
y
++
)
{
p
=
p0
;
color
=
0
;
color_rest
=
0
;
quad
=
quad0
;
dquad_x
=
1
-
width
;
for
(
x
=
0
;
x
<
width
;
x
++
)
{
icolor
=
color
;
if
(
quad
<
0
)
icolor
^=
7
;
quad
+=
dquad_x
;
dquad_x
+=
2
;
*
(
p
++
)
=
icolor
&
1
?
255
:
0
;
*
(
p
++
)
=
icolor
&
2
?
255
:
0
;
*
(
p
++
)
=
icolor
&
4
?
255
:
0
;
color_rest
+=
8
;
if
(
color_rest
>=
width
)
{
color_rest
-=
width
;
color
++
;
}
}
quad0
+=
dquad_y
;
dquad_y
+=
2
;
p0
+=
picref
->
linesize
[
0
];
}
/* draw sliding color line */
p
=
data
+
picref
->
linesize
[
0
]
*
height
*
3
/
4
;
grad
=
(
256
*
test
->
nb_frame
*
test
->
time_base
.
num
/
test
->
time_base
.
den
)
%
GRADIENT_SIZE
;
rgrad
=
0
;
dgrad
=
GRADIENT_SIZE
/
width
;
drgrad
=
GRADIENT_SIZE
%
width
;
for
(
x
=
0
;
x
<
width
;
x
++
)
{
*
(
p
++
)
=
grad
<
256
||
grad
>=
5
*
256
?
255
:
grad
>=
2
*
256
&&
grad
<
4
*
256
?
0
:
grad
<
2
*
256
?
2
*
256
-
1
-
grad
:
grad
-
4
*
256
;
*
(
p
++
)
=
grad
>=
4
*
256
?
0
:
grad
>=
1
*
256
&&
grad
<
3
*
256
?
255
:
grad
<
1
*
256
?
grad
:
4
*
256
-
1
-
grad
;
*
(
p
++
)
=
grad
<
2
*
256
?
0
:
grad
>=
3
*
256
&&
grad
<
5
*
256
?
255
:
grad
<
3
*
256
?
grad
-
2
*
256
:
6
*
256
-
1
-
grad
;
grad
+=
dgrad
;
rgrad
+=
drgrad
;
if
(
rgrad
>=
GRADIENT_SIZE
)
{
grad
++
;
rgrad
-=
GRADIENT_SIZE
;
}
if
(
grad
>=
GRADIENT_SIZE
)
grad
-=
GRADIENT_SIZE
;
}
for
(
y
=
height
/
8
;
y
>
0
;
y
--
)
{
memcpy
(
p
,
p
-
picref
->
linesize
[
0
],
3
*
width
);
p
+=
picref
->
linesize
[
0
];
}
/* draw digits */
seg_size
=
width
/
80
;
if
(
seg_size
>=
1
&&
height
>=
13
*
seg_size
)
{
second
=
test
->
nb_frame
*
test
->
time_base
.
num
/
test
->
time_base
.
den
;
x
=
width
-
(
width
-
seg_size
*
64
)
/
2
;
y
=
(
height
-
seg_size
*
13
)
/
2
;
p
=
data
+
(
x
*
3
+
y
*
picref
->
linesize
[
0
]);
for
(
i
=
0
;
i
<
8
;
i
++
)
{
p
-=
3
*
8
*
seg_size
;
draw_digit
(
second
%
10
,
p
,
picref
->
linesize
[
0
],
seg_size
);
second
/=
10
;
if
(
second
==
0
)
break
;
}
}
}
static
int
request_frame
(
AVFilterLink
*
outlink
)
{
TestSourceContext
*
test
=
outlink
->
src
->
priv
;
AVFilterBufferRef
*
picref
;
if
(
test
->
max_pts
>=
0
&&
test
->
pts
>
test
->
max_pts
)
return
AVERROR_EOF
;
picref
=
avfilter_get_video_buffer
(
outlink
,
AV_PERM_WRITE
,
test
->
w
,
test
->
h
);
picref
->
pts
=
test
->
pts
++
;
test
->
nb_frame
++
;
fill_picture
(
test
,
picref
);
avfilter_start_frame
(
outlink
,
avfilter_ref_buffer
(
picref
,
~
0
));
avfilter_draw_slice
(
outlink
,
0
,
picref
->
video
->
h
,
1
);
avfilter_end_frame
(
outlink
);
avfilter_unref_buffer
(
picref
);
return
0
;
}
static
int
query_formats
(
AVFilterContext
*
ctx
)
{
static
const
enum
PixelFormat
pix_fmts
[]
=
{
PIX_FMT_RGB24
,
PIX_FMT_NONE
};
avfilter_set_common_pixel_formats
(
ctx
,
avfilter_make_format_list
(
pix_fmts
));
return
0
;
}
AVFilter
avfilter_vsrc_testsrc
=
{
.
name
=
"testsrc"
,
.
description
=
NULL_IF_CONFIG_SMALL
(
"Generate test pattern."
),
.
priv_size
=
sizeof
(
TestSourceContext
),
.
init
=
init
,
.
query_formats
=
query_formats
,
.
inputs
=
(
AVFilterPad
[])
{{
.
name
=
NULL
}},
.
outputs
=
(
AVFilterPad
[])
{{
.
name
=
"default"
,
.
type
=
AVMEDIA_TYPE_VIDEO
,
.
request_frame
=
request_frame
,
.
config_props
=
config_props
,
},
{
.
name
=
NULL
}},
};
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