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541e8f3b
编写于
12月 20, 2008
作者:
K
Kostya Shishkov
浏览文件
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电子邮件补丁
差异文件
RV30 loop filter
Originally committed as revision 16245 to
svn://svn.ffmpeg.org/ffmpeg/trunk
上级
3f16ed15
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
122 addition
and
0 deletion
+122
-0
libavcodec/rv30.c
libavcodec/rv30.c
+122
-0
未找到文件。
libavcodec/rv30.c
浏览文件 @
541e8f3b
...
...
@@ -112,6 +112,127 @@ static int rv30_decode_mb_info(RV34DecContext *r)
return
rv30_b_types
[
code
];
}
static
inline
void
rv30_weak_loop_filter
(
uint8_t
*
src
,
const
int
step
,
const
int
stride
,
const
int
lim
)
{
uint8_t
*
cm
=
ff_cropTbl
+
MAX_NEG_CROP
;
int
i
,
diff
;
for
(
i
=
0
;
i
<
4
;
i
++
){
diff
=
((
src
[
-
2
*
step
]
-
src
[
1
*
step
])
-
(
src
[
-
1
*
step
]
-
src
[
0
*
step
])
*
4
)
>>
3
;
diff
=
av_clip
(
diff
,
-
lim
,
lim
);
src
[
-
1
*
step
]
=
cm
[
src
[
-
1
*
step
]
+
diff
];
src
[
0
*
step
]
=
cm
[
src
[
0
*
step
]
-
diff
];
src
+=
stride
;
}
}
static
void
rv30_loop_filter
(
RV34DecContext
*
r
,
int
row
)
{
MpegEncContext
*
s
=
&
r
->
s
;
int
mb_pos
,
mb_x
;
int
i
,
j
,
k
;
uint8_t
*
Y
,
*
C
;
int
loc_lim
,
cur_lim
,
left_lim
=
0
,
top_lim
=
0
;
mb_pos
=
row
*
s
->
mb_stride
;
for
(
mb_x
=
0
;
mb_x
<
s
->
mb_width
;
mb_x
++
,
mb_pos
++
){
int
mbtype
=
s
->
current_picture_ptr
->
mb_type
[
mb_pos
];
if
(
IS_INTRA
(
mbtype
)
||
IS_SEPARATE_DC
(
mbtype
))
r
->
deblock_coefs
[
mb_pos
]
=
0xFFFF
;
if
(
IS_INTRA
(
mbtype
))
r
->
cbp_chroma
[
mb_pos
]
=
0xFF
;
}
/* all vertical edges are filtered first
* and horizontal edges are filtered on the next iteration
*/
mb_pos
=
row
*
s
->
mb_stride
;
for
(
mb_x
=
0
;
mb_x
<
s
->
mb_width
;
mb_x
++
,
mb_pos
++
){
cur_lim
=
rv30_loop_filt_lim
[
s
->
current_picture_ptr
->
qscale_table
[
mb_pos
]];
if
(
mb_x
)
left_lim
=
rv30_loop_filt_lim
[
s
->
current_picture_ptr
->
qscale_table
[
mb_pos
-
1
]];
for
(
j
=
0
;
j
<
16
;
j
+=
4
){
Y
=
s
->
current_picture_ptr
->
data
[
0
]
+
mb_x
*
16
+
(
row
*
16
+
j
)
*
s
->
linesize
+
4
*
!
mb_x
;
for
(
i
=
!
mb_x
;
i
<
4
;
i
++
,
Y
+=
4
){
int
ij
=
i
+
j
;
loc_lim
=
0
;
if
(
r
->
deblock_coefs
[
mb_pos
]
&
(
1
<<
ij
))
loc_lim
=
cur_lim
;
else
if
(
!
i
&&
r
->
deblock_coefs
[
mb_pos
-
1
]
&
(
1
<<
(
ij
+
3
)))
loc_lim
=
left_lim
;
else
if
(
i
&&
r
->
deblock_coefs
[
mb_pos
]
&
(
1
<<
(
ij
-
1
)))
loc_lim
=
cur_lim
;
if
(
loc_lim
)
rv30_weak_loop_filter
(
Y
,
1
,
s
->
linesize
,
loc_lim
);
}
}
for
(
k
=
0
;
k
<
2
;
k
++
){
int
cur_cbp
,
left_cbp
=
0
;
cur_cbp
=
(
r
->
cbp_chroma
[
mb_pos
]
>>
(
k
*
4
))
&
0xF
;
if
(
mb_x
)
left_cbp
=
(
r
->
cbp_chroma
[
mb_pos
-
1
]
>>
(
k
*
4
))
&
0xF
;
for
(
j
=
0
;
j
<
8
;
j
+=
4
){
C
=
s
->
current_picture_ptr
->
data
[
k
+
1
]
+
mb_x
*
8
+
(
row
*
8
+
j
)
*
s
->
uvlinesize
+
4
*
!
mb_x
;
for
(
i
=
!
mb_x
;
i
<
2
;
i
++
,
C
+=
4
){
int
ij
=
i
+
(
j
>>
1
);
loc_lim
=
0
;
if
(
cur_cbp
&&
(
1
<<
ij
))
loc_lim
=
cur_lim
;
else
if
(
!
i
&&
left_cbp
&
(
1
<<
(
ij
+
1
)))
loc_lim
=
left_lim
;
else
if
(
i
&&
cur_cbp
&
(
1
<<
(
ij
-
1
)))
loc_lim
=
cur_lim
;
if
(
loc_lim
)
rv30_weak_loop_filter
(
C
,
1
,
s
->
uvlinesize
,
loc_lim
);
}
}
}
}
mb_pos
=
row
*
s
->
mb_stride
;
for
(
mb_x
=
0
;
mb_x
<
s
->
mb_width
;
mb_x
++
,
mb_pos
++
){
cur_lim
=
rv30_loop_filt_lim
[
s
->
current_picture_ptr
->
qscale_table
[
mb_pos
]];
if
(
row
)
top_lim
=
rv30_loop_filt_lim
[
s
->
current_picture_ptr
->
qscale_table
[
mb_pos
-
s
->
mb_stride
]];
for
(
j
=
4
*!
row
;
j
<
16
;
j
+=
4
){
Y
=
s
->
current_picture_ptr
->
data
[
0
]
+
mb_x
*
16
+
(
row
*
16
+
j
)
*
s
->
linesize
;
for
(
i
=
0
;
i
<
4
;
i
++
,
Y
+=
4
){
int
ij
=
i
+
j
;
loc_lim
=
0
;
if
(
r
->
deblock_coefs
[
mb_pos
]
&
(
1
<<
ij
))
loc_lim
=
cur_lim
;
else
if
(
!
j
&&
r
->
deblock_coefs
[
mb_pos
-
s
->
mb_stride
]
&
(
1
<<
(
ij
+
12
)))
loc_lim
=
top_lim
;
else
if
(
j
&&
r
->
deblock_coefs
[
mb_pos
]
&
(
1
<<
(
ij
-
4
)))
loc_lim
=
cur_lim
;
if
(
loc_lim
)
rv30_weak_loop_filter
(
Y
,
s
->
linesize
,
1
,
loc_lim
);
}
}
for
(
k
=
0
;
k
<
2
;
k
++
){
int
cur_cbp
,
top_cbp
=
0
;
cur_cbp
=
(
r
->
cbp_chroma
[
mb_pos
]
>>
(
k
*
4
))
&
0xF
;
if
(
row
)
top_cbp
=
(
r
->
cbp_chroma
[
mb_pos
-
s
->
mb_stride
]
>>
(
k
*
4
))
&
0xF
;
for
(
j
=
4
*!
row
;
j
<
8
;
j
+=
4
){
C
=
s
->
current_picture_ptr
->
data
[
k
+
1
]
+
mb_x
*
8
+
(
row
*
8
+
j
)
*
s
->
uvlinesize
;
for
(
i
=
0
;
i
<
2
;
i
++
,
C
+=
4
){
int
ij
=
i
+
(
j
>>
1
);
loc_lim
=
0
;
if
(
r
->
cbp_chroma
[
mb_pos
]
&&
(
1
<<
ij
))
loc_lim
=
cur_lim
;
else
if
(
!
j
&&
top_cbp
&
(
1
<<
(
ij
+
2
)))
loc_lim
=
top_lim
;
else
if
(
j
&&
cur_cbp
&
(
1
<<
(
ij
-
2
)))
loc_lim
=
cur_lim
;
if
(
loc_lim
)
rv30_weak_loop_filter
(
C
,
s
->
uvlinesize
,
1
,
loc_lim
);
}
}
}
}
}
/**
* Initialize decoder.
*/
...
...
@@ -130,6 +251,7 @@ static av_cold int rv30_decode_init(AVCodecContext *avctx)
r
->
parse_slice_header
=
rv30_parse_slice_header
;
r
->
decode_intra_types
=
rv30_decode_intra_types
;
r
->
decode_mb_info
=
rv30_decode_mb_info
;
r
->
loop_filter
=
rv30_loop_filter
;
r
->
luma_dc_quant_i
=
rv30_luma_dc_quant
;
r
->
luma_dc_quant_p
=
rv30_luma_dc_quant
;
return
0
;
...
...
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