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体验新版 GitCode,发现更多精彩内容 >>
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54b55c8d
编写于
9月 07, 2006
作者:
K
Kostya Shishkov
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
Cursor drawing support
Originally committed as revision 6183 to
svn://svn.ffmpeg.org/ffmpeg/trunk
上级
b2565d71
变更
1
显示空白变更内容
内联
并排
Showing
1 changed file
with
167 addition
and
5 deletion
+167
-5
libavcodec/vmnc.c
libavcodec/vmnc.c
+167
-5
未找到文件。
libavcodec/vmnc.c
浏览文件 @
54b55c8d
...
...
@@ -60,6 +60,13 @@ typedef struct VmncContext {
int
bigendian
;
uint8_t
pal
[
768
];
int
width
,
height
;
/* cursor data */
int
cur_w
,
cur_h
;
int
cur_x
,
cur_y
;
int
cur_hx
,
cur_hy
;
uint8_t
*
curbits
,
*
curmask
;
uint8_t
*
screendta
;
}
VmncContext
;
/* read pixel value from stream */
...
...
@@ -75,6 +82,93 @@ static always_inline int vmnc_get_pixel(uint8_t* buf, int bpp, int be) {
}
}
static
void
load_cursor
(
VmncContext
*
c
,
uint8_t
*
src
)
{
int
i
,
j
,
p
;
const
int
bpp
=
c
->
bpp2
;
uint8_t
*
dst8
=
c
->
curbits
;
uint16_t
*
dst16
=
(
uint16_t
*
)
c
->
curbits
;
uint32_t
*
dst32
=
(
uint32_t
*
)
c
->
curbits
;
for
(
j
=
0
;
j
<
c
->
cur_h
;
j
++
)
{
for
(
i
=
0
;
i
<
c
->
cur_w
;
i
++
)
{
p
=
vmnc_get_pixel
(
src
,
bpp
,
c
->
bigendian
);
src
+=
bpp
;
if
(
bpp
==
1
)
*
dst8
++
=
p
;
if
(
bpp
==
2
)
*
dst16
++
=
p
;
if
(
bpp
==
4
)
*
dst32
++
=
p
;
}
}
dst8
=
c
->
curmask
;
dst16
=
(
uint16_t
*
)
c
->
curmask
;
dst32
=
(
uint32_t
*
)
c
->
curmask
;
for
(
j
=
0
;
j
<
c
->
cur_h
;
j
++
)
{
for
(
i
=
0
;
i
<
c
->
cur_w
;
i
++
)
{
p
=
vmnc_get_pixel
(
src
,
bpp
,
c
->
bigendian
);
src
+=
bpp
;
if
(
bpp
==
1
)
*
dst8
++
=
p
;
if
(
bpp
==
2
)
*
dst16
++
=
p
;
if
(
bpp
==
4
)
*
dst32
++
=
p
;
}
}
}
static
void
put_cursor
(
uint8_t
*
dst
,
int
stride
,
VmncContext
*
c
,
int
dx
,
int
dy
)
{
int
i
,
j
,
t
;
int
w
,
h
,
x
,
y
;
w
=
c
->
cur_w
;
if
(
c
->
width
<
c
->
cur_x
+
c
->
cur_w
)
w
=
c
->
width
-
c
->
cur_x
;
h
=
c
->
cur_h
;
if
(
c
->
height
<
c
->
cur_y
+
c
->
cur_h
)
h
=
c
->
height
-
c
->
cur_y
;
x
=
c
->
cur_x
;
y
=
c
->
cur_y
;
if
(
x
<
0
)
{
w
+=
x
;
x
=
0
;
}
if
(
y
<
0
)
{
h
+=
y
;
y
=
0
;
}
if
((
w
<
1
)
||
(
h
<
1
))
return
;
dst
+=
x
*
c
->
bpp2
+
y
*
stride
;
if
(
c
->
bpp2
==
1
)
{
uint8_t
*
cd
=
c
->
curbits
,
*
msk
=
c
->
curmask
;
for
(
j
=
0
;
j
<
h
;
j
++
)
{
for
(
i
=
0
;
i
<
w
;
i
++
)
dst
[
i
]
=
(
dst
[
i
]
&
cd
[
i
])
^
msk
[
i
];
msk
+=
c
->
cur_w
;
cd
+=
c
->
cur_w
;
dst
+=
stride
;
}
}
else
if
(
c
->
bpp2
==
2
)
{
uint16_t
*
cd
=
(
uint16_t
*
)
c
->
curbits
,
*
msk
=
(
uint16_t
*
)
c
->
curmask
;
uint16_t
*
dst2
;
for
(
j
=
0
;
j
<
h
;
j
++
)
{
dst2
=
(
uint16_t
*
)
dst
;
for
(
i
=
0
;
i
<
w
;
i
++
)
dst2
[
i
]
=
(
dst2
[
i
]
&
cd
[
i
])
^
msk
[
i
];
msk
+=
c
->
cur_w
;
cd
+=
c
->
cur_w
;
dst
+=
stride
;
}
}
else
if
(
c
->
bpp2
==
4
)
{
uint32_t
*
cd
=
(
uint32_t
*
)
c
->
curbits
,
*
msk
=
(
uint32_t
*
)
c
->
curmask
;
uint32_t
*
dst2
;
for
(
j
=
0
;
j
<
h
;
j
++
)
{
dst2
=
(
uint32_t
*
)
dst
;
for
(
i
=
0
;
i
<
w
;
i
++
)
dst2
[
i
]
=
(
dst2
[
i
]
&
cd
[
i
])
^
msk
[
i
];
msk
+=
c
->
cur_w
;
cd
+=
c
->
cur_w
;
dst
+=
stride
;
}
}
}
/* fill rectangle with given colour */
static
always_inline
void
paint_rect
(
uint8_t
*
dst
,
int
dx
,
int
dy
,
int
w
,
int
h
,
int
color
,
int
bpp
,
int
stride
)
{
...
...
@@ -194,6 +288,31 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
c
->
pic
.
key_frame
=
0
;
c
->
pic
.
pict_type
=
FF_P_TYPE
;
//restore screen after cursor
if
(
c
->
screendta
)
{
int
i
;
w
=
c
->
cur_w
;
if
(
c
->
width
<
c
->
cur_x
+
w
)
w
=
c
->
width
-
c
->
cur_x
;
h
=
c
->
cur_h
;
if
(
c
->
height
<
c
->
cur_y
+
h
)
h
=
c
->
height
-
c
->
cur_y
;
dx
=
c
->
cur_x
;
if
(
dx
<
0
)
{
w
+=
dx
;
dx
=
0
;
}
dy
=
c
->
cur_y
;
if
(
dy
<
0
)
{
h
+=
dy
;
dy
=
0
;
}
if
((
w
>
0
)
&&
(
h
>
0
))
{
outptr
=
c
->
pic
.
data
[
0
]
+
dx
*
c
->
bpp2
+
dy
*
c
->
pic
.
linesize
[
0
];
for
(
i
=
0
;
i
<
h
;
i
++
)
{
memcpy
(
outptr
,
c
->
screendta
+
i
*
c
->
cur_w
*
c
->
bpp2
,
w
*
c
->
bpp2
);
outptr
+=
c
->
pic
.
linesize
[
0
];
}
}
}
src
+=
2
;
chunks
=
BE_16
(
src
);
src
+=
2
;
while
(
chunks
--
)
{
...
...
@@ -202,15 +321,30 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
w
=
BE_16
(
src
);
src
+=
2
;
h
=
BE_16
(
src
);
src
+=
2
;
enc
=
BE_32
(
src
);
src
+=
4
;
outptr
=
c
->
pic
.
data
[
0
]
+
dx
*
c
->
bpp2
+
dy
*
c
->
pic
.
linesize
[
0
];
switch
(
enc
)
{
case
MAGIC_WMVd
:
//
unknown
case
MAGIC_WMVd
:
//
cursor
src
+=
2
;
src
+=
w
*
h
*
8
;
// skip this data for now
c
->
cur_w
=
w
;
c
->
cur_h
=
h
;
c
->
cur_hx
=
dx
;
c
->
cur_hy
=
dy
;
if
((
c
->
cur_hx
>
c
->
cur_w
)
||
(
c
->
cur_hy
>
c
->
cur_h
))
{
av_log
(
avctx
,
AV_LOG_ERROR
,
"Cursor hot spot is not in image: %ix%i of %ix%i cursor size
\n
"
,
c
->
cur_hx
,
c
->
cur_hy
,
c
->
cur_w
,
c
->
cur_h
);
c
->
cur_hx
=
c
->
cur_hy
=
0
;
}
c
->
curbits
=
av_realloc
(
c
->
curbits
,
c
->
cur_w
*
c
->
cur_h
*
c
->
bpp2
);
c
->
curmask
=
av_realloc
(
c
->
curmask
,
c
->
cur_w
*
c
->
cur_h
*
c
->
bpp2
);
c
->
screendta
=
av_realloc
(
c
->
screendta
,
c
->
cur_w
*
c
->
cur_h
*
c
->
bpp2
);
load_cursor
(
c
,
src
);
src
+=
w
*
h
*
c
->
bpp2
*
2
;
break
;
case
MAGIC_WMVe
:
// unknown
src
+=
2
;
break
;
case
MAGIC_WMVf
:
// unknown and empty
case
MAGIC_WMVf
:
// update cursor position
c
->
cur_x
=
dx
-
c
->
cur_hx
;
c
->
cur_y
=
dy
-
c
->
cur_hy
;
break
;
case
MAGIC_WMVi
:
// ServerInitialization struct
c
->
pic
.
key_frame
=
1
;
...
...
@@ -233,7 +367,6 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
av_log
(
avctx
,
AV_LOG_ERROR
,
"Incorrect frame size: %ix%i+%ix%i of %ix%i
\n
"
,
w
,
h
,
dx
,
dy
,
c
->
width
,
c
->
height
);
return
-
1
;
}
outptr
=
c
->
pic
.
data
[
0
]
+
dx
*
c
->
bpp2
+
dy
*
c
->
pic
.
linesize
[
0
];
paint_raw
(
outptr
,
w
,
h
,
src
,
c
->
bpp2
,
c
->
bigendian
,
c
->
pic
.
linesize
[
0
]);
src
+=
w
*
h
*
c
->
bpp2
;
break
;
...
...
@@ -242,7 +375,6 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
av_log
(
avctx
,
AV_LOG_ERROR
,
"Incorrect frame size: %ix%i+%ix%i of %ix%i
\n
"
,
w
,
h
,
dx
,
dy
,
c
->
width
,
c
->
height
);
return
-
1
;
}
outptr
=
c
->
pic
.
data
[
0
]
+
dx
*
c
->
bpp2
+
dy
*
c
->
pic
.
linesize
[
0
];
res
=
decode_hextile
(
c
,
outptr
,
src
,
w
,
h
,
c
->
pic
.
linesize
[
0
]);
if
(
res
<
0
)
return
-
1
;
...
...
@@ -253,6 +385,33 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size, uint8
chunks
=
0
;
// leave chunks decoding loop
}
}
if
(
c
->
screendta
){
int
i
;
//save screen data before painting cursor
w
=
c
->
cur_w
;
if
(
c
->
width
<
c
->
cur_x
+
w
)
w
=
c
->
width
-
c
->
cur_x
;
h
=
c
->
cur_h
;
if
(
c
->
height
<
c
->
cur_y
+
h
)
h
=
c
->
height
-
c
->
cur_y
;
dx
=
c
->
cur_x
;
if
(
dx
<
0
)
{
w
+=
dx
;
dx
=
0
;
}
dy
=
c
->
cur_y
;
if
(
dy
<
0
)
{
h
+=
dy
;
dy
=
0
;
}
if
((
w
>
0
)
&&
(
h
>
0
))
{
outptr
=
c
->
pic
.
data
[
0
]
+
dx
*
c
->
bpp2
+
dy
*
c
->
pic
.
linesize
[
0
];
for
(
i
=
0
;
i
<
h
;
i
++
)
{
memcpy
(
c
->
screendta
+
i
*
c
->
cur_w
*
c
->
bpp2
,
outptr
,
w
*
c
->
bpp2
);
outptr
+=
c
->
pic
.
linesize
[
0
];
}
outptr
=
c
->
pic
.
data
[
0
];
put_cursor
(
outptr
,
c
->
pic
.
linesize
[
0
],
c
,
c
->
cur_x
,
c
->
cur_y
);
}
}
*
data_size
=
sizeof
(
AVFrame
);
*
(
AVFrame
*
)
data
=
c
->
pic
;
...
...
@@ -315,6 +474,9 @@ static int decode_end(AVCodecContext *avctx)
if
(
c
->
pic
.
data
[
0
])
avctx
->
release_buffer
(
avctx
,
&
c
->
pic
);
av_free
(
c
->
curbits
);
av_free
(
c
->
curmask
);
av_free
(
c
->
screendta
);
return
0
;
}
...
...
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