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Linshizhi
ffmpeg.wasm-core
Commits
f89ebf88
Commit
f89ebf88
authored
Nov 21, 2019
by
Paul B Mahol
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avfilter/vf_scroll: add support for slice threading
parent
9bd4df16
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Showing
1 changed file
with
50 additions
and
27 deletions
+50
-27
vf_scroll.c
libavfilter/vf_scroll.c
+50
-27
No files found.
libavfilter/vf_scroll.c
View file @
f89ebf88
...
...
@@ -32,6 +32,8 @@ typedef struct ScrollContext {
float
h_pos
,
v_pos
;
float
h_ipos
,
v_ipos
;
int
pos_h
[
4
],
pos_v
[
4
];
const
AVPixFmtDescriptor
*
desc
;
int
nb_planes
;
int
bytes
;
...
...
@@ -70,10 +72,47 @@ static int query_formats(AVFilterContext *ctx)
return
ff_set_common_formats
(
ctx
,
fmts_list
);
}
static
void
scroll
(
ScrollContext
*
s
,
AVFrame
*
in
,
AVFrame
*
out
)
typedef
struct
ThreadData
{
AVFrame
*
in
,
*
out
;
}
ThreadData
;
static
int
scroll_slice
(
AVFilterContext
*
ctx
,
void
*
arg
,
int
jobnr
,
int
nb_jobs
)
{
ScrollContext
*
s
=
ctx
->
priv
;
ThreadData
*
td
=
arg
;
AVFrame
*
in
=
td
->
in
;
AVFrame
*
out
=
td
->
out
;
for
(
int
p
=
0
;
p
<
s
->
nb_planes
;
p
++
)
{
const
uint8_t
*
src
=
in
->
data
[
p
];
const
int
h
=
s
->
planeheight
[
p
];
const
int
w
=
s
->
planewidth
[
p
]
*
s
->
bytes
;
const
int
slice_start
=
(
h
*
jobnr
)
/
nb_jobs
;
const
int
slice_end
=
(
h
*
(
jobnr
+
1
))
/
nb_jobs
;
uint8_t
*
dst
=
out
->
data
[
p
]
+
slice_start
*
out
->
linesize
[
p
];
for
(
int
y
=
slice_start
;
y
<
slice_end
;
y
++
)
{
int
yy
=
(
y
+
s
->
pos_v
[
p
])
%
h
;
const
uint8_t
*
ssrc
=
src
+
yy
*
in
->
linesize
[
p
];
if
(
s
->
pos_h
[
p
]
<
w
)
memcpy
(
dst
,
ssrc
+
s
->
pos_h
[
p
],
w
-
s
->
pos_h
[
p
]);
if
(
s
->
pos_h
[
p
]
>
0
)
memcpy
(
dst
+
w
-
s
->
pos_h
[
p
],
ssrc
,
s
->
pos_h
[
p
]);
dst
+=
out
->
linesize
[
p
];
}
}
return
0
;
}
static
void
scroll
(
AVFilterContext
*
ctx
,
AVFrame
*
in
,
AVFrame
*
out
)
{
ScrollContext
*
s
=
ctx
->
priv
;
ThreadData
td
;
int
h_pos
,
v_pos
;
int
pos_h
[
4
],
pos_v
[
4
];
s
->
h_pos
=
fmodf
(
s
->
h_pos
,
in
->
width
);
s
->
v_pos
=
fmodf
(
s
->
v_pos
,
in
->
height
);
...
...
@@ -86,29 +125,14 @@ static void scroll(ScrollContext *s, AVFrame *in, AVFrame *out)
if
(
v_pos
<
0
)
v_pos
+=
in
->
height
;
pos_v
[
1
]
=
pos_v
[
2
]
=
AV_CEIL_RSHIFT
(
v_pos
,
s
->
desc
->
log2_chroma_h
);
pos_v
[
0
]
=
pos_v
[
3
]
=
v_pos
;
pos_h
[
1
]
=
pos_h
[
2
]
=
AV_CEIL_RSHIFT
(
h_pos
,
s
->
desc
->
log2_chroma_w
)
*
s
->
bytes
;
pos_h
[
0
]
=
pos_h
[
3
]
=
h_pos
*
s
->
bytes
;
s
->
pos_v
[
1
]
=
s
->
pos_v
[
2
]
=
AV_CEIL_RSHIFT
(
v_pos
,
s
->
desc
->
log2_chroma_h
);
s
->
pos_v
[
0
]
=
s
->
pos_v
[
3
]
=
v_pos
;
s
->
pos_h
[
1
]
=
s
->
pos_h
[
2
]
=
AV_CEIL_RSHIFT
(
h_pos
,
s
->
desc
->
log2_chroma_w
)
*
s
->
bytes
;
s
->
pos_h
[
0
]
=
s
->
pos_h
[
3
]
=
h_pos
*
s
->
bytes
;
for
(
int
p
=
0
;
p
<
s
->
nb_planes
;
p
++
)
{
const
uint8_t
*
src
=
in
->
data
[
p
];
uint8_t
*
dst
=
out
->
data
[
p
];
const
int
h
=
s
->
planeheight
[
p
];
const
int
w
=
s
->
planewidth
[
p
]
*
s
->
bytes
;
for
(
int
y
=
0
;
y
<
h
;
y
++
)
{
int
yy
=
(
y
+
pos_v
[
p
])
%
h
;
const
uint8_t
*
ssrc
=
src
+
yy
*
in
->
linesize
[
p
];
if
(
pos_h
[
p
]
<
w
)
memcpy
(
dst
,
ssrc
+
pos_h
[
p
],
w
-
pos_h
[
p
]);
if
(
pos_h
[
p
]
>
0
)
memcpy
(
dst
+
w
-
pos_h
[
p
],
ssrc
,
pos_h
[
p
]);
dst
+=
out
->
linesize
[
p
];
}
}
td
.
in
=
in
;
td
.
out
=
out
;
ctx
->
internal
->
execute
(
ctx
,
scroll_slice
,
&
td
,
NULL
,
FFMIN
(
out
->
height
,
ff_filter_get_nb_threads
(
ctx
)));
s
->
h_pos
+=
s
->
h_speed
*
in
->
width
;
s
->
v_pos
+=
s
->
v_speed
*
in
->
height
;
...
...
@@ -117,7 +141,6 @@ static void scroll(ScrollContext *s, AVFrame *in, AVFrame *out)
static
int
filter_frame
(
AVFilterLink
*
inlink
,
AVFrame
*
in
)
{
AVFilterContext
*
ctx
=
inlink
->
dst
;
ScrollContext
*
s
=
ctx
->
priv
;
AVFilterLink
*
outlink
=
ctx
->
outputs
[
0
];
AVFrame
*
out
;
...
...
@@ -128,7 +151,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
}
av_frame_copy_props
(
out
,
in
);
scroll
(
s
,
in
,
out
);
scroll
(
ctx
,
in
,
out
);
av_frame_free
(
&
in
);
return
ff_filter_frame
(
outlink
,
out
);
...
...
@@ -196,6 +219,6 @@ AVFilter ff_vf_scroll = {
.
query_formats
=
query_formats
,
.
inputs
=
scroll_inputs
,
.
outputs
=
scroll_outputs
,
.
flags
=
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
,
.
flags
=
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
|
AVFILTER_FLAG_SLICE_THREADS
,
.
process_command
=
ff_filter_process_command
,
};
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