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submodule
ffmpeg
Commits
711ffb84
Commit
711ffb84
authored
Oct 12, 2012
by
Clément Bœsch
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lavf/swfdec: support DefineBitsLossless{,2} tag.
parent
4e2e3d94
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1 changed file
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123 additions
and
0 deletions
+123
-0
swfdec.c
libavformat/swfdec.c
+123
-0
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libavformat/swfdec.c
View file @
711ffb84
...
...
@@ -20,6 +20,8 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "swf.h"
...
...
@@ -253,6 +255,127 @@ static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
return
pkt
->
size
;
}
}
}
else
if
(
tag
==
TAG_DEFINEBITSLOSSLESS
||
tag
==
TAG_DEFINEBITSLOSSLESS2
)
{
#if CONFIG_ZLIB
long
out_len
;
uint8_t
*
buf
=
NULL
,
*
zbuf
=
NULL
,
*
pal
;
uint32_t
colormap
[
AVPALETTE_COUNT
]
=
{
0
};
const
int
alpha_bmp
=
tag
==
TAG_DEFINEBITSLOSSLESS2
;
const
int
colormapbpp
=
3
+
alpha_bmp
;
int
linesize
,
colormapsize
=
0
;
const
int
ch_id
=
avio_rl16
(
pb
);
const
int
bmp_fmt
=
avio_r8
(
pb
);
const
int
width
=
avio_rl16
(
pb
);
const
int
height
=
avio_rl16
(
pb
);
len
-=
2
+
1
+
2
+
2
;
switch
(
bmp_fmt
)
{
case
3
:
// PAL-8
linesize
=
width
;
colormapsize
=
avio_r8
(
pb
)
+
1
;
len
--
;
break
;
case
4
:
// RGB15
linesize
=
width
*
2
;
break
;
case
5
:
// RGB24 (0RGB)
linesize
=
width
*
4
;
break
;
default:
av_log
(
s
,
AV_LOG_ERROR
,
"invalid bitmap format %d, skipped
\n
"
,
bmp_fmt
);
goto
bitmap_end_skip
;
}
linesize
=
FFALIGN
(
linesize
,
4
);
if
(
av_image_check_size
(
width
,
height
,
0
,
s
)
<
0
||
linesize
>=
INT_MAX
/
height
||
linesize
*
height
>=
INT_MAX
-
colormapsize
*
colormapbpp
)
{
av_log
(
s
,
AV_LOG_ERROR
,
"invalid frame size %dx%d
\n
"
,
width
,
height
);
goto
bitmap_end_skip
;
}
out_len
=
colormapsize
*
colormapbpp
+
linesize
*
height
;
av_dlog
(
s
,
"bitmap: ch=%d fmt=%d %dx%d (linesize=%d) len=%d->%ld pal=%d
\n
"
,
ch_id
,
bmp_fmt
,
width
,
height
,
linesize
,
len
,
out_len
,
colormapsize
);
zbuf
=
av_malloc
(
len
);
buf
=
av_malloc
(
out_len
);
if
(
!
zbuf
||
!
buf
)
{
res
=
AVERROR
(
ENOMEM
);
goto
bitmap_end
;
}
len
=
avio_read
(
pb
,
zbuf
,
len
);
if
(
len
<
0
||
(
res
=
uncompress
(
buf
,
&
out_len
,
zbuf
,
len
))
!=
Z_OK
)
{
av_log
(
s
,
AV_LOG_WARNING
,
"Failed to uncompress one bitmap
\n
"
);
goto
bitmap_end_skip
;
}
for
(
i
=
0
;
i
<
s
->
nb_streams
;
i
++
)
{
st
=
s
->
streams
[
i
];
if
(
st
->
codec
->
codec_id
==
AV_CODEC_ID_RAWVIDEO
&&
st
->
id
==
-
3
)
break
;
}
if
(
i
==
s
->
nb_streams
)
{
vst
=
avformat_new_stream
(
s
,
NULL
);
if
(
!
vst
)
{
res
=
AVERROR
(
ENOMEM
);
goto
bitmap_end
;
}
vst
->
id
=
-
3
;
/* -3 to avoid clash with video stream and audio stream */
vst
->
codec
->
codec_type
=
AVMEDIA_TYPE_VIDEO
;
vst
->
codec
->
codec_id
=
AV_CODEC_ID_RAWVIDEO
;
avpriv_set_pts_info
(
vst
,
64
,
256
,
swf
->
frame_rate
);
st
=
vst
;
}
st
->
codec
->
width
=
width
;
st
->
codec
->
height
=
height
;
if
((
res
=
av_new_packet
(
pkt
,
out_len
-
colormapsize
*
colormapbpp
))
<
0
)
goto
bitmap_end
;
pkt
->
pos
=
pos
;
pkt
->
stream_index
=
st
->
index
;
switch
(
bmp_fmt
)
{
case
3
:
st
->
codec
->
pix_fmt
=
AV_PIX_FMT_PAL8
;
for
(
i
=
0
;
i
<
colormapsize
;
i
++
)
if
(
alpha_bmp
)
colormap
[
i
]
=
buf
[
3
]
<<
24
|
AV_RB24
(
buf
+
4
*
i
);
else
colormap
[
i
]
=
0xffU
<<
24
|
AV_RB24
(
buf
+
3
*
i
);
pal
=
av_packet_new_side_data
(
pkt
,
AV_PKT_DATA_PALETTE
,
AVPALETTE_SIZE
);
if
(
!
pal
)
{
res
=
AVERROR
(
ENOMEM
);
goto
bitmap_end
;
}
memcpy
(
pal
,
colormap
,
AVPALETTE_SIZE
);
break
;
case
4
:
st
->
codec
->
pix_fmt
=
AV_PIX_FMT_RGB555
;
break
;
case
5
:
st
->
codec
->
pix_fmt
=
alpha_bmp
?
AV_PIX_FMT_ARGB
:
AV_PIX_FMT_0RGB
;
break
;
default:
av_assert0
(
0
);
}
memcpy
(
pkt
->
data
,
buf
+
colormapsize
*
colormapbpp
,
linesize
*
height
);
res
=
pkt
->
size
;
bitmap_end:
av_freep
(
&
zbuf
);
av_freep
(
&
buf
);
return
res
;
bitmap_end_skip:
av_freep
(
&
zbuf
);
av_freep
(
&
buf
);
#else
av_log
(
s
,
AV_LOG_ERROR
,
"this file requires zlib support compiled in
\n
"
);
#endif
}
else
if
(
tag
==
TAG_STREAMBLOCK
)
{
for
(
i
=
0
;
i
<
s
->
nb_streams
;
i
++
)
{
st
=
s
->
streams
[
i
];
...
...
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