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Linshizhi
ffmpeg.wasm-core
Commits
7af507ea
Commit
7af507ea
authored
Dec 28, 2011
by
Thad Ward
Committed by
Anton Khirnov
Dec 29, 2011
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lagarith: add decode support for arith rgb24 mode
Signed-off-by:
Anton Khirnov
<
anton@khirnov.net
>
parent
8f521690
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1 changed file
with
22 additions
and
10 deletions
+22
-10
lagarith.c
libavcodec/lagarith.c
+22
-10
No files found.
libavcodec/lagarith.c
View file @
7af507ea
...
...
@@ -447,7 +447,7 @@ static int lag_decode_frame(AVCodecContext *avctx,
uint32_t
offset_gu
=
0
,
offset_bv
=
0
,
offset_ry
=
9
;
int
offs
[
4
];
uint8_t
*
srcs
[
4
],
*
dst
;
int
i
,
j
;
int
i
,
j
,
planes
=
3
;
AVFrame
*
picture
=
data
;
...
...
@@ -480,33 +480,39 @@ static int lag_decode_frame(AVCodecContext *avctx,
break
;
case
FRAME_ARITH_RGBA
:
avctx
->
pix_fmt
=
PIX_FMT_RGB32
;
planes
=
4
;
offset_ry
+=
4
;
offs
[
3
]
=
AV_RL32
(
buf
+
9
);
case
FRAME_ARITH_RGB24
:
if
(
frametype
==
FRAME_ARITH_RGB24
)
avctx
->
pix_fmt
=
PIX_FMT_RGB24
;
if
(
avctx
->
get_buffer
(
avctx
,
p
)
<
0
)
{
av_log
(
avctx
,
AV_LOG_ERROR
,
"get_buffer() failed
\n
"
);
return
-
1
;
}
offs
[
0
]
=
offset_bv
;
offs
[
1
]
=
offset_gu
;
offs
[
2
]
=
13
;
offs
[
3
]
=
AV_RL32
(
buf
+
9
);
offs
[
2
]
=
offset_ry
;
if
(
!
l
->
rgb_planes
)
{
l
->
rgb_stride
=
FFALIGN
(
avctx
->
width
,
16
);
l
->
rgb_planes
=
av_malloc
(
l
->
rgb_stride
*
avctx
->
height
*
4
);
l
->
rgb_planes
=
av_malloc
(
l
->
rgb_stride
*
avctx
->
height
*
planes
);
if
(
!
l
->
rgb_planes
)
{
av_log
(
avctx
,
AV_LOG_ERROR
,
"cannot allocate temporary buffer
\n
"
);
return
AVERROR
(
ENOMEM
);
}
}
for
(
i
=
0
;
i
<
4
;
i
++
)
for
(
i
=
0
;
i
<
planes
;
i
++
)
srcs
[
i
]
=
l
->
rgb_planes
+
(
i
+
1
)
*
l
->
rgb_stride
*
avctx
->
height
-
l
->
rgb_stride
;
for
(
i
=
0
;
i
<
4
;
i
++
)
for
(
i
=
0
;
i
<
planes
;
i
++
)
lag_decode_arith_plane
(
l
,
srcs
[
i
],
avctx
->
width
,
avctx
->
height
,
-
l
->
rgb_stride
,
buf
+
offs
[
i
],
buf_size
);
dst
=
p
->
data
[
0
];
for
(
i
=
0
;
i
<
4
;
i
++
)
for
(
i
=
0
;
i
<
planes
;
i
++
)
srcs
[
i
]
=
l
->
rgb_planes
+
i
*
l
->
rgb_stride
*
avctx
->
height
;
for
(
j
=
0
;
j
<
avctx
->
height
;
j
++
)
{
for
(
i
=
0
;
i
<
avctx
->
width
;
i
++
)
{
...
...
@@ -514,13 +520,19 @@ static int lag_decode_frame(AVCodecContext *avctx,
r
=
srcs
[
0
][
i
];
g
=
srcs
[
1
][
i
];
b
=
srcs
[
2
][
i
];
a
=
srcs
[
3
][
i
];
r
+=
g
;
b
+=
g
;
AV_WN32
(
dst
+
i
*
4
,
MKBETAG
(
a
,
r
,
g
,
b
));
if
(
frametype
==
FRAME_ARITH_RGBA
)
{
a
=
srcs
[
3
][
i
];
AV_WN32
(
dst
+
i
*
4
,
MKBETAG
(
a
,
r
,
g
,
b
));
}
else
{
dst
[
i
*
3
+
0
]
=
r
;
dst
[
i
*
3
+
1
]
=
g
;
dst
[
i
*
3
+
2
]
=
b
;
}
}
dst
+=
p
->
linesize
[
0
];
for
(
i
=
0
;
i
<
4
;
i
++
)
for
(
i
=
0
;
i
<
planes
;
i
++
)
srcs
[
i
]
+=
l
->
rgb_stride
;
}
break
;
...
...
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