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Linshizhi
ffmpeg.wasm-core
Commits
28338bc2
Commit
28338bc2
authored
Sep 17, 2011
by
Stefano Sabatini
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lavfi: add libass based subtitles renderer
parent
31a1342e
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7 changed files
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268 additions
and
2 deletions
+268
-2
Changelog
Changelog
+1
-0
configure
configure
+5
-0
filters.texi
doc/filters.texi
+16
-0
Makefile
libavfilter/Makefile
+1
-0
allfilters.c
libavfilter/allfilters.c
+1
-0
avfilter.h
libavfilter/avfilter.h
+2
-2
vf_ass.c
libavfilter/vf_ass.c
+242
-0
No files found.
Changelog
View file @
28338bc2
...
...
@@ -124,6 +124,7 @@ easier to use. The changes are:
- compact and csv output in ffprobe
- pan audio filter
- IFF Amiga Continuous Bitmap (ACBM) decoder
- ass filter
version 0.8:
...
...
configure
View file @
28338bc2
...
...
@@ -168,6 +168,7 @@ External library support:
--enable-frei0r enable frei0r video filtering
--enable-gnutls enable gnutls [no]
--enable-libaacplus enable AAC+ encoding via libaacplus [no]
--enable-libass enable libass subtitles rendering [no]
--enable-libcelt enable CELT decoding via libcelt [no]
--enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]
--enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]
...
...
@@ -1008,6 +1009,7 @@ CONFIG_LIST="
hardcoded_tables
huffman
libaacplus
libass
libcdio
libcelt
libdc1394
...
...
@@ -1613,6 +1615,7 @@ udp_protocol_deps="network"
# filters
amovie_filter_deps
=
"avcodec avformat"
ass_filter_deps
=
"libass"
blackframe_filter_deps
=
"gpl"
boxblur_filter_deps
=
"gpl"
cropdetect_filter_deps
=
"gpl"
...
...
@@ -3057,6 +3060,7 @@ enabled avisynth && require2 vfw32 "windows.h vfw.h" AVIFileInit -lavifil32
enabled frei0r
&&
{
check_header frei0r.h
||
die
"ERROR: frei0r.h header not found"
;
}
enabled gnutls
&&
require_pkg_config gnutls gnutls/gnutls.h gnutls_global_init
enabled libaacplus
&&
require
"libaacplus >= 2.0.0"
aacplus.h aacplusEncOpen
-laacplus
enabled libass
&&
require_pkg_config libass ass/ass.h ass_library_init
enabled libcelt
&&
require libcelt celt/celt.h celt_decode
-lcelt0
enabled libdc1394
&&
require_pkg_config libdc1394-2 dc1394/dc1394.h dc1394_new
enabled libdirac
&&
require_pkg_config dirac
\
...
...
@@ -3395,6 +3399,7 @@ echo "AVISynth enabled ${avisynth-no}"
echo
"frei0r enabled
${
frei0r
-no
}
"
echo
"gnutls enabled
${
gnutls
-no
}
"
echo
"libaacplus enabled
${
libaacplus
-no
}
"
echo
"libass enabled
${
libass
-no
}
"
echo
"libcdio support
${
libcdio
-no
}
"
echo
"libcelt enabled
${
libcelt
-no
}
"
echo
"libdc1394 support
${
libdc1394
-no
}
"
...
...
doc/filters.texi
View file @
28338bc2
...
...
@@ -574,6 +574,22 @@ build.
Below is a description of the currently available video filters.
@section ass
Draw ASS (Advanced Substation Alpha) subtitles on top of input video
using the libass library.
To enable compilation of this filter you need to configure FFmpeg with
@code{--enable-libass}.
This filter accepts in input the name of the ass file to render.
For example, to render the file @file{sub.ass} on top of the input
video, use the command:
@example
ass=sub.ass
@end example
@section blackframe
Detect frames that are (almost) completely black. Can be useful to
...
...
libavfilter/Makefile
View file @
28338bc2
...
...
@@ -40,6 +40,7 @@ OBJS-$(CONFIG_ANULLSRC_FILTER) += asrc_anullsrc.o
OBJS-$(CONFIG_ABUFFERSINK_FILTER)
+=
sink_buffer.o
OBJS-$(CONFIG_ANULLSINK_FILTER)
+=
asink_anullsink.o
OBJS-$(CONFIG_ASS_FILTER)
+=
vf_ass.o
OBJS-$(CONFIG_BLACKFRAME_FILTER)
+=
vf_blackframe.o
OBJS-$(CONFIG_BOXBLUR_FILTER)
+=
vf_boxblur.o
OBJS-$(CONFIG_COPY_FILTER)
+=
vf_copy.o
...
...
libavfilter/allfilters.c
View file @
28338bc2
...
...
@@ -51,6 +51,7 @@ void avfilter_register_all(void)
REGISTER_FILTER
(
ABUFFERSINK
,
abuffersink
,
asink
);
REGISTER_FILTER
(
ANULLSINK
,
anullsink
,
asink
);
REGISTER_FILTER
(
ASS
,
ass
,
vf
);
REGISTER_FILTER
(
BLACKFRAME
,
blackframe
,
vf
);
REGISTER_FILTER
(
BOXBLUR
,
boxblur
,
vf
);
REGISTER_FILTER
(
COPY
,
copy
,
vf
);
...
...
libavfilter/avfilter.h
View file @
28338bc2
...
...
@@ -29,8 +29,8 @@
#include "libavutil/rational.h"
#define LIBAVFILTER_VERSION_MAJOR 2
#define LIBAVFILTER_VERSION_MINOR
49
#define LIBAVFILTER_VERSION_MICRO
1
#define LIBAVFILTER_VERSION_MINOR
50
#define LIBAVFILTER_VERSION_MICRO
0
#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
LIBAVFILTER_VERSION_MINOR, \
...
...
libavfilter/vf_ass.c
0 → 100644
View file @
28338bc2
/*
* Copyright (c) 2011 Baptiste Coudurier
* 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
* Libass subtitles burning filter.
*
* @see{http://www.matroska.org/technical/specs/subtitles/ssa.html}
*/
#include <ass/ass.h>
#include "libavutil/avstring.h"
#include "libavutil/imgutils.h"
#include "libavutil/pixdesc.h"
#include "drawutils.h"
#include "avfilter.h"
typedef
struct
{
ASS_Library
*
library
;
ASS_Renderer
*
renderer
;
ASS_Track
*
track
;
int
hsub
,
vsub
;
char
*
filename
;
uint8_t
rgba_map
[
4
];
int
pix_step
[
4
];
///< steps per pixel for each plane of the main output
}
AssContext
;
/* libass supports a log level ranging from 0 to 7 */
int
ass_libav_log_level_map
[]
=
{
AV_LOG_QUIET
,
/* 0 */
AV_LOG_PANIC
,
/* 1 */
AV_LOG_FATAL
,
/* 2 */
AV_LOG_ERROR
,
/* 3 */
AV_LOG_WARNING
,
/* 4 */
AV_LOG_INFO
,
/* 5 */
AV_LOG_VERBOSE
,
/* 6 */
AV_LOG_DEBUG
,
/* 7 */
};
static
void
ass_log
(
int
ass_level
,
const
char
*
fmt
,
va_list
args
,
void
*
ctx
)
{
int
level
=
ass_libav_log_level_map
[
ass_level
];
av_vlog
(
ctx
,
level
,
fmt
,
args
);
av_log
(
ctx
,
level
,
"
\n
"
);
}
static
av_cold
int
init
(
AVFilterContext
*
ctx
,
const
char
*
args
,
void
*
opaque
)
{
AssContext
*
ass
=
ctx
->
priv
;
if
(
args
)
ass
->
filename
=
av_get_token
(
&
args
,
":"
);
if
(
!
ass
->
filename
||
!*
ass
->
filename
)
{
av_log
(
ctx
,
AV_LOG_ERROR
,
"No filename provided!
\n
"
);
return
AVERROR
(
EINVAL
);
}
ass
->
library
=
ass_library_init
();
if
(
!
ass
->
library
)
{
av_log
(
ctx
,
AV_LOG_ERROR
,
"Could not initialize libass.
\n
"
);
return
AVERROR
(
EINVAL
);
}
ass_set_message_cb
(
ass
->
library
,
ass_log
,
ctx
);
ass
->
renderer
=
ass_renderer_init
(
ass
->
library
);
if
(
!
ass
->
renderer
)
{
av_log
(
ctx
,
AV_LOG_ERROR
,
"Could not initialize libass renderer.
\n
"
);
return
AVERROR
(
EINVAL
);
}
ass
->
track
=
ass_read_file
(
ass
->
library
,
ass
->
filename
,
NULL
);
if
(
!
ass
->
track
)
{
av_log
(
ctx
,
AV_LOG_ERROR
,
"Could not create a libass track when reading file '%s'
\n
"
,
ass
->
filename
);
return
AVERROR
(
EINVAL
);
}
ass_set_fonts
(
ass
->
renderer
,
NULL
,
NULL
,
1
,
NULL
,
1
);
return
0
;
}
static
av_cold
void
uninit
(
AVFilterContext
*
ctx
)
{
AssContext
*
ass
=
ctx
->
priv
;
av_freep
(
&
ass
->
filename
);
if
(
ass
->
track
)
ass_free_track
(
ass
->
track
);
if
(
ass
->
renderer
)
ass_renderer_done
(
ass
->
renderer
);
if
(
ass
->
library
)
ass_library_done
(
ass
->
library
);
}
static
int
query_formats
(
AVFilterContext
*
ctx
)
{
static
const
enum
PixelFormat
pix_fmts
[]
=
{
PIX_FMT_ARGB
,
PIX_FMT_RGBA
,
PIX_FMT_ABGR
,
PIX_FMT_BGRA
,
PIX_FMT_RGB24
,
PIX_FMT_BGR24
,
PIX_FMT_NONE
};
avfilter_set_common_pixel_formats
(
ctx
,
avfilter_make_format_list
(
pix_fmts
));
return
0
;
}
static
int
config_input
(
AVFilterLink
*
inlink
)
{
AssContext
*
ass
=
inlink
->
dst
->
priv
;
const
AVPixFmtDescriptor
*
pix_desc
=
&
av_pix_fmt_descriptors
[
inlink
->
format
];
double
sar
=
inlink
->
sample_aspect_ratio
.
num
?
av_q2d
(
inlink
->
sample_aspect_ratio
)
:
1
;
double
dar
=
inlink
->
w
/
inlink
->
h
*
sar
;
av_image_fill_max_pixsteps
(
ass
->
pix_step
,
NULL
,
pix_desc
);
ff_fill_rgba_map
(
ass
->
rgba_map
,
inlink
->
format
);
ass
->
hsub
=
pix_desc
->
log2_chroma_w
;
ass
->
vsub
=
pix_desc
->
log2_chroma_h
;
ass_set_frame_size
(
ass
->
renderer
,
inlink
->
w
,
inlink
->
h
);
ass_set_aspect_ratio
(
ass
->
renderer
,
dar
,
sar
);
return
0
;
}
static
void
null_draw_slice
(
AVFilterLink
*
link
,
int
y
,
int
h
,
int
slice_dir
)
{
}
#define R 0
#define G 1
#define B 2
#define A 3
#define SET_PIXEL_RGB(picref, rgba_color, val, x, y, pixel_step, r_off, g_off, b_off) { \
p = picref->data[0] + (x) * pixel_step + ((y) * picref->linesize[0]); \
alpha = rgba_color[A] * (val) * 129; \
*(p+r_off) = (alpha * rgba_color[R] + (255*255*129 - alpha) * *(p+r_off)) >> 23; \
*(p+g_off) = (alpha * rgba_color[G] + (255*255*129 - alpha) * *(p+g_off)) >> 23; \
*(p+b_off) = (alpha * rgba_color[B] + (255*255*129 - alpha) * *(p+b_off)) >> 23; \
}
/* libass stores an RGBA color in the format RRGGBBTT, where TT is the transparency level */
#define AR(c) ( (c)>>24)
#define AG(c) (((c)>>16)&0xFF)
#define AB(c) (((c)>>8) &0xFF)
#define AA(c) ((0xFF-c) &0xFF)
static
void
overlay_ass_image
(
AVFilterBufferRef
*
picref
,
const
uint8_t
*
rgba_map
,
const
int
pix_step
,
const
ASS_Image
*
image
)
{
int
i
,
j
;
int
alpha
;
uint8_t
*
p
;
const
int
ro
=
rgba_map
[
R
];
const
int
go
=
rgba_map
[
G
];
const
int
bo
=
rgba_map
[
B
];
for
(;
image
;
image
=
image
->
next
)
{
uint8_t
rgba_color
[]
=
{
AR
(
image
->
color
),
AG
(
image
->
color
),
AB
(
image
->
color
),
AA
(
image
->
color
)};
unsigned
char
*
row
=
image
->
bitmap
;
for
(
i
=
0
;
i
<
image
->
h
;
i
++
)
{
for
(
j
=
0
;
j
<
image
->
w
;
j
++
)
{
if
(
row
[
j
])
{
SET_PIXEL_RGB
(
picref
,
rgba_color
,
row
[
j
],
image
->
dst_x
+
j
,
image
->
dst_y
+
i
,
pix_step
,
ro
,
go
,
bo
);
}
}
row
+=
image
->
stride
;
}
}
}
static
void
end_frame
(
AVFilterLink
*
inlink
)
{
AVFilterContext
*
ctx
=
inlink
->
dst
;
AVFilterLink
*
outlink
=
ctx
->
outputs
[
0
];
AssContext
*
ass
=
ctx
->
priv
;
AVFilterBufferRef
*
picref
=
inlink
->
cur_buf
;
int
detect_change
=
0
;
double
time_ms
=
picref
->
pts
*
av_q2d
(
inlink
->
time_base
)
*
1000
;
ASS_Image
*
image
=
ass_render_frame
(
ass
->
renderer
,
ass
->
track
,
time_ms
,
&
detect_change
);
if
(
detect_change
)
av_log
(
ctx
,
AV_LOG_DEBUG
,
"Change happened at time ms:%f
\n
"
,
time_ms
);
overlay_ass_image
(
picref
,
ass
->
rgba_map
,
ass
->
pix_step
[
0
],
image
);
avfilter_draw_slice
(
outlink
,
0
,
picref
->
video
->
h
,
1
);
avfilter_end_frame
(
outlink
);
}
AVFilter
avfilter_vf_ass
=
{
.
name
=
"ass"
,
.
description
=
NULL_IF_CONFIG_SMALL
(
"Render subtitles onto input video using the libass library."
),
.
priv_size
=
sizeof
(
AssContext
),
.
init
=
init
,
.
uninit
=
uninit
,
.
query_formats
=
query_formats
,
.
inputs
=
(
const
AVFilterPad
[])
{
{
.
name
=
"default"
,
.
type
=
AVMEDIA_TYPE_VIDEO
,
.
get_video_buffer
=
avfilter_null_get_video_buffer
,
.
start_frame
=
avfilter_null_start_frame
,
.
draw_slice
=
null_draw_slice
,
.
end_frame
=
end_frame
,
.
config_props
=
config_input
,
.
min_perms
=
AV_PERM_WRITE
|
AV_PERM_READ
,
.
rej_perms
=
AV_PERM_PRESERVE
},
{
.
name
=
NULL
}
},
.
outputs
=
(
const
AVFilterPad
[])
{
{
.
name
=
"default"
,
.
type
=
AVMEDIA_TYPE_VIDEO
,
},
{
.
name
=
NULL
}
},
};
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