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Linshizhi
ffmpeg.wasm-core
Commits
14da7f9e
Commit
14da7f9e
authored
Apr 19, 2014
by
Derek Buitenhuis
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fic: Support rendering cursors
Signed-off-by:
Derek Buitenhuis
<
derek.buitenhuis@gmail.com
>
parent
1aa388d4
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1 changed file
with
114 additions
and
2 deletions
+114
-2
fic.c
libavcodec/fic.c
+114
-2
No files found.
libavcodec/fic.c
View file @
14da7f9e
...
@@ -38,6 +38,7 @@ typedef struct FICThreadContext {
...
@@ -38,6 +38,7 @@ typedef struct FICThreadContext {
typedef
struct
FICContext
{
typedef
struct
FICContext
{
AVCodecContext
*
avctx
;
AVCodecContext
*
avctx
;
AVFrame
*
frame
;
AVFrame
*
frame
;
AVFrame
*
final_frame
;
FICThreadContext
*
slice_data
;
FICThreadContext
*
slice_data
;
int
slice_data_size
;
int
slice_data_size
;
...
@@ -48,6 +49,8 @@ typedef struct FICContext {
...
@@ -48,6 +49,8 @@ typedef struct FICContext {
int
aligned_width
,
aligned_height
;
int
aligned_width
,
aligned_height
;
int
num_slices
,
slice_h
;
int
num_slices
,
slice_h
;
uint8_t
cursor_buf
[
4096
];
}
FICContext
;
}
FICContext
;
static
const
uint8_t
fic_qmat_hq
[
64
]
=
{
static
const
uint8_t
fic_qmat_hq
[
64
]
=
{
...
@@ -186,6 +189,69 @@ static int fic_decode_slice(AVCodecContext *avctx, void *tdata)
...
@@ -186,6 +189,69 @@ static int fic_decode_slice(AVCodecContext *avctx, void *tdata)
return
0
;
return
0
;
}
}
static
av_always_inline
void
fic_alpha_blend
(
uint8_t
*
dst
,
uint8_t
*
src
,
int
size
,
uint8_t
*
alpha
)
{
int
i
;
for
(
i
=
0
;
i
<
size
;
i
++
)
dst
[
i
]
+=
((
src
[
i
]
-
dst
[
i
])
*
alpha
[
i
])
>>
8
;
}
static
void
fic_draw_cursor
(
AVCodecContext
*
avctx
,
int
cur_x
,
int
cur_y
)
{
FICContext
*
ctx
=
avctx
->
priv_data
;
uint8_t
*
ptr
=
ctx
->
cursor_buf
;
uint8_t
*
dstptr
[
3
];
uint8_t
planes
[
4
][
1024
];
uint8_t
chroma
[
3
][
256
];
int
i
,
j
,
p
;
/* Convert to YUVA444. */
for
(
i
=
0
;
i
<
1024
;
i
++
)
{
planes
[
0
][
i
]
=
((
25
*
ptr
[
0
]
+
129
*
ptr
[
1
]
+
66
*
ptr
[
2
])
/
255
)
+
16
;
planes
[
1
][
i
]
=
((
-
38
*
ptr
[
0
]
+
112
*
ptr
[
1
]
+
-
74
*
ptr
[
2
])
/
255
)
+
128
;
planes
[
2
][
i
]
=
((
-
18
*
ptr
[
0
]
+
112
*
ptr
[
1
]
+
-
94
*
ptr
[
2
])
/
255
)
+
128
;
planes
[
3
][
i
]
=
ptr
[
3
];
ptr
+=
4
;
}
/* Subsample chroma. */
for
(
i
=
0
;
i
<
32
;
i
+=
2
)
for
(
j
=
0
;
j
<
32
;
j
+=
2
)
for
(
p
=
0
;
p
<
3
;
p
++
)
chroma
[
p
][
16
*
(
i
/
2
)
+
j
/
2
]
=
(
planes
[
p
+
1
][
32
*
i
+
j
]
+
planes
[
p
+
1
][
32
*
i
+
j
+
1
]
+
planes
[
p
+
1
][
32
*
(
i
+
1
)
+
j
]
+
planes
[
p
+
1
][
32
*
(
i
+
1
)
+
j
+
1
])
/
4
;
/* Seek to x/y pos of cursor. */
for
(
i
=
0
;
i
<
3
;
i
++
)
dstptr
[
i
]
=
ctx
->
final_frame
->
data
[
i
]
+
(
ctx
->
final_frame
->
linesize
[
i
]
*
(
cur_y
>>
!!
i
))
+
(
cur_x
>>
!!
i
)
+
!!
i
;
/* Copy. */
for
(
i
=
0
;
i
<
FFMIN
(
32
,
avctx
->
height
-
cur_y
)
-
1
;
i
+=
2
)
{
int
lsize
=
FFMIN
(
32
,
avctx
->
width
-
cur_x
);
int
csize
=
lsize
/
2
;
fic_alpha_blend
(
dstptr
[
0
],
planes
[
0
]
+
i
*
32
,
lsize
,
planes
[
3
]
+
i
*
32
);
fic_alpha_blend
(
dstptr
[
0
]
+
ctx
->
final_frame
->
linesize
[
0
],
planes
[
0
]
+
(
i
+
1
)
*
32
,
lsize
,
planes
[
3
]
+
(
i
+
1
)
*
32
);
fic_alpha_blend
(
dstptr
[
1
],
chroma
[
0
]
+
(
i
/
2
)
*
16
,
csize
,
chroma
[
2
]
+
(
i
/
2
)
*
16
);
fic_alpha_blend
(
dstptr
[
2
],
chroma
[
1
]
+
(
i
/
2
)
*
16
,
csize
,
chroma
[
2
]
+
(
i
/
2
)
*
16
);
dstptr
[
0
]
+=
ctx
->
final_frame
->
linesize
[
0
]
*
2
;
dstptr
[
1
]
+=
ctx
->
final_frame
->
linesize
[
1
];
dstptr
[
2
]
+=
ctx
->
final_frame
->
linesize
[
2
];
}
}
static
int
fic_decode_frame
(
AVCodecContext
*
avctx
,
void
*
data
,
static
int
fic_decode_frame
(
AVCodecContext
*
avctx
,
void
*
data
,
int
*
got_frame
,
AVPacket
*
avpkt
)
int
*
got_frame
,
AVPacket
*
avpkt
)
{
{
...
@@ -195,6 +261,8 @@ static int fic_decode_frame(AVCodecContext *avctx, void *data,
...
@@ -195,6 +261,8 @@ static int fic_decode_frame(AVCodecContext *avctx, void *data,
int
slice
,
nslices
;
int
slice
,
nslices
;
int
msize
;
int
msize
;
int
tsize
;
int
tsize
;
int
cur_x
,
cur_y
;
int
skip_cursor
=
0
;
uint8_t
*
sdata
;
uint8_t
*
sdata
;
if
((
ret
=
ff_reget_buffer
(
avctx
,
ctx
->
frame
))
<
0
)
{
if
((
ret
=
ff_reget_buffer
(
avctx
,
ctx
->
frame
))
<
0
)
{
...
@@ -228,10 +296,34 @@ static int fic_decode_frame(AVCodecContext *avctx, void *data,
...
@@ -228,10 +296,34 @@ static int fic_decode_frame(AVCodecContext *avctx, void *data,
/* Skip cursor data. */
/* Skip cursor data. */
tsize
=
AV_RB24
(
src
+
24
);
tsize
=
AV_RB24
(
src
+
24
);
if
(
tsize
>
avpkt
->
size
-
FIC_HEADER_SIZE
)
{
if
(
tsize
>
avpkt
->
size
-
FIC_HEADER_SIZE
)
{
av_log
(
avctx
,
AV_LOG_ERROR
,
"Invalid cursor data size.
\n
"
);
av_log
(
avctx
,
AV_LOG_ERROR
,
"Packet is too small to contain cursor (%d vs %d bytes).
\n
"
,
tsize
,
avpkt
->
size
-
FIC_HEADER_SIZE
);
return
AVERROR_INVALIDDATA
;
return
AVERROR_INVALIDDATA
;
}
}
if
(
tsize
<
32
)
{
av_log
(
avctx
,
AV_LOG_WARNING
,
"Cursor data too small. Skipping cursor.
\n
"
);
skip_cursor
=
1
;
}
/* Cursor position. */
cur_x
=
AV_RL16
(
src
+
33
);
cur_y
=
AV_RL16
(
src
+
35
);
if
(
cur_x
>
avctx
->
width
||
cur_y
>
avctx
->
height
)
{
av_log
(
avctx
,
AV_LOG_WARNING
,
"Invalid cursor position: (%d,%d). Skipping cusor.
\n
"
,
cur_x
,
cur_y
);
skip_cursor
=
1
;
}
if
(
AV_RL16
(
src
+
37
)
!=
32
||
AV_RL16
(
src
+
39
)
!=
32
)
{
av_log
(
avctx
,
AV_LOG_WARNING
,
"Invalid cursor size. Skipping cursor.
\n
"
);
skip_cursor
=
1
;
}
/* Slice height for all but the last slice. */
/* Slice height for all but the last slice. */
ctx
->
slice_h
=
16
*
(
ctx
->
aligned_height
>>
4
)
/
nslices
;
ctx
->
slice_h
=
16
*
(
ctx
->
aligned_height
>>
4
)
/
nslices
;
if
(
ctx
->
slice_h
%
16
)
if
(
ctx
->
slice_h
%
16
)
...
@@ -296,9 +388,28 @@ static int fic_decode_frame(AVCodecContext *avctx, void *data,
...
@@ -296,9 +388,28 @@ static int fic_decode_frame(AVCodecContext *avctx, void *data,
NULL
,
nslices
,
sizeof
(
ctx
->
slice_data
[
0
])))
<
0
)
NULL
,
nslices
,
sizeof
(
ctx
->
slice_data
[
0
])))
<
0
)
return
ret
;
return
ret
;
av_frame_free
(
&
ctx
->
final_frame
);
ctx
->
final_frame
=
av_frame_clone
(
ctx
->
frame
);
if
(
!
ctx
->
final_frame
)
{
av_log
(
avctx
,
AV_LOG_ERROR
,
"Could not clone frame buffer.
\n
"
);
return
AVERROR
(
ENOMEM
);
}
/* Make sure we use a user-supplied buffer. */
if
((
ret
=
ff_reget_buffer
(
avctx
,
ctx
->
final_frame
))
<
0
)
{
av_log
(
avctx
,
AV_LOG_ERROR
,
"Could not make frame writable.
\n
"
);
return
ret
;
}
/* Draw cursor. */
if
(
!
skip_cursor
)
{
memcpy
(
ctx
->
cursor_buf
,
src
+
59
,
32
*
32
*
4
);
fic_draw_cursor
(
avctx
,
cur_x
,
cur_y
);
}
skip:
skip:
*
got_frame
=
1
;
*
got_frame
=
1
;
if
((
ret
=
av_frame_ref
(
data
,
ctx
->
frame
))
<
0
)
if
((
ret
=
av_frame_ref
(
data
,
ctx
->
f
inal_f
rame
))
<
0
)
return
ret
;
return
ret
;
return
avpkt
->
size
;
return
avpkt
->
size
;
...
@@ -309,6 +420,7 @@ static av_cold int fic_decode_close(AVCodecContext *avctx)
...
@@ -309,6 +420,7 @@ static av_cold int fic_decode_close(AVCodecContext *avctx)
FICContext
*
ctx
=
avctx
->
priv_data
;
FICContext
*
ctx
=
avctx
->
priv_data
;
av_freep
(
&
ctx
->
slice_data
);
av_freep
(
&
ctx
->
slice_data
);
av_frame_free
(
&
ctx
->
final_frame
);
av_frame_free
(
&
ctx
->
frame
);
av_frame_free
(
&
ctx
->
frame
);
return
0
;
return
0
;
...
...
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