Skip to content
Projects
Groups
Snippets
Help
Loading...
Help
Contribute to GitLab
Sign in / Register
Toggle navigation
F
ffmpeg.wasm-core
Project
Project
Details
Activity
Cycle Analytics
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Charts
Issues
0
Issues
0
List
Board
Labels
Milestones
Merge Requests
0
Merge Requests
0
CI / CD
CI / CD
Pipelines
Jobs
Schedules
Charts
Wiki
Wiki
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Charts
Create a new issue
Jobs
Commits
Issue Boards
Open sidebar
Linshizhi
ffmpeg.wasm-core
Commits
fc97db64
Commit
fc97db64
authored
Sep 13, 2002
by
Michael Niedermayer
Browse files
Options
Browse Files
Download
Email Patches
Plain Diff
interlaced b frames cleanup
Originally committed as revision 938 to
svn://svn.ffmpeg.org/ffmpeg/trunk
parent
a343d33e
Hide whitespace changes
Inline
Side-by-side
Showing
1 changed file
with
74 additions
and
73 deletions
+74
-73
h263.c
libavcodec/h263.c
+74
-73
No files found.
libavcodec/h263.c
View file @
fc97db64
...
@@ -2812,13 +2812,19 @@ int h263_decode_mb(MpegEncContext *s,
...
@@ -2812,13 +2812,19 @@ int h263_decode_mb(MpegEncContext *s,
return
0
;
return
0
;
}
}
modb1
=
get_bits1
(
&
s
->
gb
);
modb1
=
get_bits1
(
&
s
->
gb
);
if
(
modb1
==
0
){
if
(
modb1
){
mb_type
=
4
;
//like MB_TYPE_B_DIRECT but no vectors coded
cbp
=
0
;
}
else
{
int
field_mv
;
modb2
=
get_bits1
(
&
s
->
gb
);
modb2
=
get_bits1
(
&
s
->
gb
);
mb_type
=
get_vlc2
(
&
s
->
gb
,
mb_type_b_vlc
.
table
,
MB_TYPE_B_VLC_BITS
,
1
);
mb_type
=
get_vlc2
(
&
s
->
gb
,
mb_type_b_vlc
.
table
,
MB_TYPE_B_VLC_BITS
,
1
);
if
(
modb2
==
0
)
cbp
=
get_bits
(
&
s
->
gb
,
6
);
if
(
modb2
)
cbp
=
0
;
else
cbp
=
0
;
else
cbp
=
get_bits
(
&
s
->
gb
,
6
);
if
(
mb_type
&&
cbp
)
{
if
(
mb_type
!=
MB_TYPE_B_DIRECT
&&
cbp
)
{
if
(
get_bits1
(
&
s
->
gb
)){
if
(
get_bits1
(
&
s
->
gb
)){
s
->
qscale
+=
get_bits1
(
&
s
->
gb
)
*
4
-
2
;
s
->
qscale
+=
get_bits1
(
&
s
->
gb
)
*
4
-
2
;
if
(
s
->
qscale
<
1
)
if
(
s
->
qscale
<
1
)
...
@@ -2828,87 +2834,81 @@ int h263_decode_mb(MpegEncContext *s,
...
@@ -2828,87 +2834,81 @@ int h263_decode_mb(MpegEncContext *s,
h263_dc_scale
(
s
);
h263_dc_scale
(
s
);
}
}
}
}
s
->
mv_type
=
MV_TYPE_16X16
;
//might be changed to 8X8 or FIELD later
field_mv
=
0
;
if
(
!
s
->
progressive_sequence
){
if
(
!
s
->
progressive_sequence
){
if
(
cbp
)
if
(
cbp
)
s
->
interlaced_dct
=
get_bits1
(
&
s
->
gb
);
s
->
interlaced_dct
=
get_bits1
(
&
s
->
gb
);
if
(
mb_type
!=
MB_TYPE_B_DIRECT
){
if
(
mb_type
!=
MB_TYPE_B_DIRECT
&&
get_bits1
(
&
s
->
gb
))
if
(
get_bits1
(
&
s
->
gb
)){
field_mv
=
1
;
s
->
mv_type
=
MV_TYPE_FIELD
;
if
(
mb_type
!=
MB_TYPE_B_BACKW
){
s
->
field_select
[
0
][
0
]
=
get_bits1
(
&
s
->
gb
);
//FIXME move down
s
->
field_select
[
0
][
1
]
=
get_bits1
(
&
s
->
gb
);
}
if
(
mb_type
!=
MB_TYPE_B_FORW
){
s
->
field_select
[
1
][
0
]
=
get_bits1
(
&
s
->
gb
);
s
->
field_select
[
1
][
1
]
=
get_bits1
(
&
s
->
gb
);
}
}
}
}
}
}
else
{
s
->
mv_type
=
MV_TYPE_16X16
;
//might be changed to 8X8 later
mb_type
=
4
;
//like MB_TYPE_B_DIRECT but no vectors coded
cbp
=
0
;
}
mx
=
my
=
0
;
if
(
mb_type
==
MB_TYPE_B_DIRECT
){
mx
=
h263_decode_motion
(
s
,
0
,
1
);
my
=
h263_decode_motion
(
s
,
0
,
1
);
}
if
(
s
->
mv_type
==
MV_TYPE_16X16
){
if
(
mb_type
==
MB_TYPE_B_FORW
||
mb_type
==
MB_TYPE_B_BIDIR
){
s
->
mv_dir
=
MV_DIR_FORWARD
;
mx
=
h263_decode_motion
(
s
,
s
->
last_mv
[
0
][
0
][
0
],
s
->
f_code
);
my
=
h263_decode_motion
(
s
,
s
->
last_mv
[
0
][
0
][
1
],
s
->
f_code
);
s
->
last_mv
[
0
][
1
][
0
]
=
s
->
last_mv
[
0
][
0
][
0
]
=
s
->
mv
[
0
][
0
][
0
]
=
mx
;
s
->
last_mv
[
0
][
1
][
1
]
=
s
->
last_mv
[
0
][
0
][
1
]
=
s
->
mv
[
0
][
0
][
1
]
=
my
;
}
else
s
->
mv_dir
=
0
;
if
(
mb_type
==
MB_TYPE_B_BACKW
||
mb_type
==
MB_TYPE_B_BIDIR
){
s
->
mv_dir
|=
MV_DIR_BACKWARD
;
mx
=
h263_decode_motion
(
s
,
s
->
last_mv
[
1
][
0
][
0
],
s
->
b_code
);
my
=
h263_decode_motion
(
s
,
s
->
last_mv
[
1
][
0
][
1
],
s
->
b_code
);
s
->
last_mv
[
1
][
1
][
0
]
=
s
->
last_mv
[
1
][
0
][
0
]
=
s
->
mv
[
1
][
0
][
0
]
=
mx
;
s
->
last_mv
[
1
][
1
][
1
]
=
s
->
last_mv
[
1
][
0
][
1
]
=
s
->
mv
[
1
][
0
][
1
]
=
my
;
}
if
(
mb_type
!=
4
&&
mb_type
!=
MB_TYPE_B_DIRECT
)
PRINT_MB_TYPE
(
mb_type
==
MB_TYPE_B_FORW
?
"F"
:
(
mb_type
==
MB_TYPE_B_BACKW
?
"B"
:
"T"
));
}
else
{
/* MV_TYPE_FIELD */
if
(
mb_type
==
MB_TYPE_B_FORW
||
mb_type
==
MB_TYPE_B_BIDIR
){
s
->
mv_dir
=
MV_DIR_FORWARD
;
for
(
i
=
0
;
i
<
2
;
i
++
){
mx
=
h263_decode_motion
(
s
,
s
->
last_mv
[
0
][
i
][
0
]
,
s
->
f_code
);
my
=
h263_decode_motion
(
s
,
s
->
last_mv
[
0
][
i
][
1
]
/
2
,
s
->
f_code
);
s
->
last_mv
[
0
][
i
][
0
]
=
s
->
mv
[
0
][
i
][
0
]
=
mx
;
s
->
last_mv
[
0
][
i
][
1
]
=
(
s
->
mv
[
0
][
i
][
1
]
=
my
)
*
2
;
}
}
else
s
->
mv_dir
=
0
;
if
(
mb_type
==
MB_TYPE_B_BACKW
||
mb_type
==
MB_TYPE_B_BIDIR
){
if
(
mb_type
!=
MB_TYPE_B_DIRECT
&&
!
field_mv
){
s
->
mv_dir
|=
MV_DIR_BACKWARD
;
s
->
mv_type
=
MV_TYPE_16X16
;
for
(
i
=
0
;
i
<
2
;
i
++
){
if
(
mb_type
!=
MB_TYPE_B_BACKW
){
mx
=
h263_decode_motion
(
s
,
s
->
last_mv
[
1
][
i
][
0
]
,
s
->
b_code
);
s
->
mv_dir
=
MV_DIR_FORWARD
;
my
=
h263_decode_motion
(
s
,
s
->
last_mv
[
1
][
i
][
1
]
/
2
,
s
->
b_code
);
s
->
last_mv
[
1
][
i
][
0
]
=
s
->
mv
[
1
][
i
][
0
]
=
mx
;
mx
=
h263_decode_motion
(
s
,
s
->
last_mv
[
0
][
0
][
0
],
s
->
f_code
);
s
->
last_mv
[
1
][
i
][
1
]
=
(
s
->
mv
[
1
][
i
][
1
]
=
my
)
*
2
;
my
=
h263_decode_motion
(
s
,
s
->
last_mv
[
0
][
0
][
1
],
s
->
f_code
);
s
->
last_mv
[
0
][
1
][
0
]
=
s
->
last_mv
[
0
][
0
][
0
]
=
s
->
mv
[
0
][
0
][
0
]
=
mx
;
s
->
last_mv
[
0
][
1
][
1
]
=
s
->
last_mv
[
0
][
0
][
1
]
=
s
->
mv
[
0
][
0
][
1
]
=
my
;
}
else
s
->
mv_dir
=
0
;
if
(
mb_type
!=
MB_TYPE_B_FORW
){
s
->
mv_dir
|=
MV_DIR_BACKWARD
;
mx
=
h263_decode_motion
(
s
,
s
->
last_mv
[
1
][
0
][
0
],
s
->
b_code
);
my
=
h263_decode_motion
(
s
,
s
->
last_mv
[
1
][
0
][
1
],
s
->
b_code
);
s
->
last_mv
[
1
][
1
][
0
]
=
s
->
last_mv
[
1
][
0
][
0
]
=
s
->
mv
[
1
][
0
][
0
]
=
mx
;
s
->
last_mv
[
1
][
1
][
1
]
=
s
->
last_mv
[
1
][
0
][
1
]
=
s
->
mv
[
1
][
0
][
1
]
=
my
;
}
if
(
mb_type
!=
MB_TYPE_B_DIRECT
)
PRINT_MB_TYPE
(
mb_type
==
MB_TYPE_B_FORW
?
"F"
:
(
mb_type
==
MB_TYPE_B_BACKW
?
"B"
:
"T"
));
}
else
if
(
mb_type
!=
MB_TYPE_B_DIRECT
){
s
->
mv_type
=
MV_TYPE_FIELD
;
if
(
mb_type
!=
MB_TYPE_B_BACKW
){
s
->
mv_dir
=
MV_DIR_FORWARD
;
s
->
field_select
[
0
][
0
]
=
get_bits1
(
&
s
->
gb
);
s
->
field_select
[
0
][
1
]
=
get_bits1
(
&
s
->
gb
);
for
(
i
=
0
;
i
<
2
;
i
++
){
mx
=
h263_decode_motion
(
s
,
s
->
last_mv
[
0
][
i
][
0
]
,
s
->
f_code
);
my
=
h263_decode_motion
(
s
,
s
->
last_mv
[
0
][
i
][
1
]
/
2
,
s
->
f_code
);
s
->
last_mv
[
0
][
i
][
0
]
=
s
->
mv
[
0
][
i
][
0
]
=
mx
;
s
->
last_mv
[
0
][
i
][
1
]
=
(
s
->
mv
[
0
][
i
][
1
]
=
my
)
*
2
;
}
}
else
s
->
mv_dir
=
0
;
if
(
mb_type
!=
MB_TYPE_B_FORW
){
s
->
mv_dir
|=
MV_DIR_BACKWARD
;
s
->
field_select
[
1
][
0
]
=
get_bits1
(
&
s
->
gb
);
s
->
field_select
[
1
][
1
]
=
get_bits1
(
&
s
->
gb
);
for
(
i
=
0
;
i
<
2
;
i
++
){
mx
=
h263_decode_motion
(
s
,
s
->
last_mv
[
1
][
i
][
0
]
,
s
->
b_code
);
my
=
h263_decode_motion
(
s
,
s
->
last_mv
[
1
][
i
][
1
]
/
2
,
s
->
b_code
);
s
->
last_mv
[
1
][
i
][
0
]
=
s
->
mv
[
1
][
i
][
0
]
=
mx
;
s
->
last_mv
[
1
][
i
][
1
]
=
(
s
->
mv
[
1
][
i
][
1
]
=
my
)
*
2
;
}
}
}
if
(
mb_type
!=
MB_TYPE_B_DIRECT
)
PRINT_MB_TYPE
(
mb_type
==
MB_TYPE_B_FORW
?
"f"
:
(
mb_type
==
MB_TYPE_B_BACKW
?
"b"
:
"t"
));
}
}
if
(
mb_type
!=
4
&&
mb_type
!=
MB_TYPE_B_DIRECT
)
PRINT_MB_TYPE
(
mb_type
==
MB_TYPE_B_FORW
?
"f"
:
(
mb_type
==
MB_TYPE_B_BACKW
?
"b"
:
"t"
));
}
}
if
(
mb_type
==
4
||
mb_type
==
MB_TYPE_B_DIRECT
){
if
(
mb_type
==
4
||
mb_type
==
MB_TYPE_B_DIRECT
){
int
mb_index
=
s
->
mb_x
+
s
->
mb_y
*
s
->
mb_width
;
int
mb_index
=
s
->
mb_x
+
s
->
mb_y
*
s
->
mb_width
;
int
i
;
int
i
;
if
(
mb_type
==
4
)
mx
=
my
=
0
;
else
{
mx
=
h263_decode_motion
(
s
,
0
,
1
);
my
=
h263_decode_motion
(
s
,
0
,
1
);
}
s
->
mv_dir
=
MV_DIR_FORWARD
|
MV_DIR_BACKWARD
|
MV_DIRECT
;
s
->
mv_dir
=
MV_DIR_FORWARD
|
MV_DIR_BACKWARD
|
MV_DIRECT
;
xy
=
s
->
block_index
[
0
];
xy
=
s
->
block_index
[
0
];
...
@@ -2918,6 +2918,7 @@ int h263_decode_mb(MpegEncContext *s,
...
@@ -2918,6 +2918,7 @@ int h263_decode_mb(MpegEncContext *s,
//FIXME avoid divides
//FIXME avoid divides
switch
(
s
->
co_located_type_table
[
mb_index
]){
switch
(
s
->
co_located_type_table
[
mb_index
]){
case
0
:
case
0
:
s
->
mv_type
=
MV_TYPE_16X16
;
s
->
mv
[
0
][
0
][
0
]
=
s
->
motion_val
[
xy
][
0
]
*
time_pb
/
time_pp
+
mx
;
s
->
mv
[
0
][
0
][
0
]
=
s
->
motion_val
[
xy
][
0
]
*
time_pb
/
time_pp
+
mx
;
s
->
mv
[
0
][
0
][
1
]
=
s
->
motion_val
[
xy
][
1
]
*
time_pb
/
time_pp
+
my
;
s
->
mv
[
0
][
0
][
1
]
=
s
->
motion_val
[
xy
][
1
]
*
time_pb
/
time_pp
+
my
;
s
->
mv
[
1
][
0
][
0
]
=
mx
?
s
->
mv
[
0
][
0
][
0
]
-
s
->
motion_val
[
xy
][
0
]
s
->
mv
[
1
][
0
][
0
]
=
mx
?
s
->
mv
[
0
][
0
][
0
]
-
s
->
motion_val
[
xy
][
0
]
...
...
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment