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Linshizhi
ffmpeg.wasm-core
Commits
3b9f41a9
Commit
3b9f41a9
authored
Jan 24, 2016
by
Paul B Mahol
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Plain Diff
avfilter/vf_zoompan: rewrite so it doesn't cache all output frames
Signed-off-by:
Paul B Mahol
<
onemda@gmail.com
>
parent
9cf81e57
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1 changed file
with
155 additions
and
103 deletions
+155
-103
vf_zoompan.c
libavfilter/vf_zoompan.c
+155
-103
No files found.
libavfilter/vf_zoompan.c
View file @
3b9f41a9
...
...
@@ -18,6 +18,7 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avassert.h"
#include "libavutil/eval.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
...
...
@@ -85,6 +86,12 @@ typedef struct ZPcontext {
int
prev_nb_frames
;
struct
SwsContext
*
sws
;
int64_t
frame_count
;
const
AVPixFmtDescriptor
*
desc
;
AVFrame
*
in
;
double
var_values
[
VARS_NB
];
int
nb_frames
;
int
current_frame
;
int
finished
;
}
ZPContext
;
#define OFFSET(x) offsetof(ZPContext, x)
...
...
@@ -116,98 +123,68 @@ static int config_output(AVFilterLink *outlink)
outlink
->
w
=
s
->
w
;
outlink
->
h
=
s
->
h
;
s
->
desc
=
av_pix_fmt_desc_get
(
outlink
->
format
);
return
0
;
}
static
int
filter_frame
(
AVFilterLink
*
inlink
,
AVFrame
*
in
)
static
int
output_single_frame
(
AVFilterContext
*
ctx
,
AVFrame
*
in
,
double
*
var_values
,
int
i
,
double
*
zoom
,
double
*
dx
,
double
*
dy
)
{
AVFilterContext
*
ctx
=
inlink
->
dst
;
AVFilterLink
*
outlink
=
ctx
->
outputs
[
0
];
ZPContext
*
s
=
ctx
->
priv
;
double
var_values
[
VARS_NB
],
nb_frames
,
zoom
,
dx
,
dy
;
const
AVPixFmtDescriptor
*
desc
=
av_pix_fmt_desc_get
(
in
->
format
);
AVFrame
*
out
=
NULL
;
int
i
,
k
,
x
,
y
,
w
,
h
,
ret
=
0
;
var_values
[
VAR_IN_W
]
=
var_values
[
VAR_IW
]
=
in
->
width
;
var_values
[
VAR_IN_H
]
=
var_values
[
VAR_IH
]
=
in
->
height
;
var_values
[
VAR_OUT_W
]
=
var_values
[
VAR_OW
]
=
s
->
w
;
var_values
[
VAR_OUT_H
]
=
var_values
[
VAR_OH
]
=
s
->
h
;
var_values
[
VAR_IN
]
=
inlink
->
frame_count
+
1
;
var_values
[
VAR_ON
]
=
outlink
->
frame_count
+
1
;
var_values
[
VAR_PX
]
=
s
->
x
;
var_values
[
VAR_PY
]
=
s
->
y
;
var_values
[
VAR_X
]
=
0
;
var_values
[
VAR_Y
]
=
0
;
var_values
[
VAR_PZOOM
]
=
s
->
prev_zoom
;
var_values
[
VAR_ZOOM
]
=
1
;
var_values
[
VAR_PDURATION
]
=
s
->
prev_nb_frames
;
var_values
[
VAR_A
]
=
(
double
)
in
->
width
/
in
->
height
;
var_values
[
VAR_SAR
]
=
inlink
->
sample_aspect_ratio
.
num
?
(
double
)
inlink
->
sample_aspect_ratio
.
num
/
inlink
->
sample_aspect_ratio
.
den
:
1
;
var_values
[
VAR_DAR
]
=
var_values
[
VAR_A
]
*
var_values
[
VAR_SAR
];
var_values
[
VAR_HSUB
]
=
1
<<
desc
->
log2_chroma_w
;
var_values
[
VAR_VSUB
]
=
1
<<
desc
->
log2_chroma_h
;
if
((
ret
=
av_expr_parse_and_eval
(
&
nb_frames
,
s
->
duration_expr_str
,
var_names
,
var_values
,
NULL
,
NULL
,
NULL
,
NULL
,
NULL
,
0
,
ctx
))
<
0
)
goto
fail
;
var_values
[
VAR_DURATION
]
=
nb_frames
;
for
(
i
=
0
;
i
<
nb_frames
;
i
++
)
{
int
px
[
4
];
int
py
[
4
];
uint8_t
*
input
[
4
];
int64_t
pts
=
av_rescale_q
(
in
->
pts
,
inlink
->
time_base
,
AVFilterLink
*
outlink
=
ctx
->
outputs
[
0
];
int64_t
pts
=
av_rescale_q
(
in
->
pts
,
ctx
->
inputs
[
0
]
->
time_base
,
outlink
->
time_base
)
+
s
->
frame_count
;
int
k
,
x
,
y
,
w
,
h
,
ret
=
0
;
uint8_t
*
input
[
4
];
int
px
[
4
],
py
[
4
];
AVFrame
*
out
;
var_values
[
VAR_TIME
]
=
pts
*
av_q2d
(
outlink
->
time_base
);
var_values
[
VAR_FRAME
]
=
i
;
var_values
[
VAR_ON
]
=
outlink
->
frame_count
+
1
;
if
((
ret
=
av_expr_parse_and_eval
(
&
zoom
,
s
->
zoom_expr_str
,
if
((
ret
=
av_expr_parse_and_eval
(
zoom
,
s
->
zoom_expr_str
,
var_names
,
var_values
,
NULL
,
NULL
,
NULL
,
NULL
,
NULL
,
0
,
ctx
))
<
0
)
goto
fail
;
return
ret
;
zoom
=
av_clipd
(
zoom
,
1
,
10
);
var_values
[
VAR_ZOOM
]
=
zoom
;
w
=
in
->
width
*
(
1
.
0
/
zoom
);
h
=
in
->
height
*
(
1
.
0
/
zoom
);
*
zoom
=
av_clipd
(
*
zoom
,
1
,
10
);
var_values
[
VAR_ZOOM
]
=
*
zoom
;
w
=
in
->
width
*
(
1
.
0
/
*
zoom
);
h
=
in
->
height
*
(
1
.
0
/
*
zoom
);
if
((
ret
=
av_expr_parse_and_eval
(
&
dx
,
s
->
x_expr_str
,
if
((
ret
=
av_expr_parse_and_eval
(
dx
,
s
->
x_expr_str
,
var_names
,
var_values
,
NULL
,
NULL
,
NULL
,
NULL
,
NULL
,
0
,
ctx
))
<
0
)
goto
fail
;
x
=
dx
=
av_clipd
(
dx
,
0
,
FFMAX
(
in
->
width
-
w
,
0
));
var_values
[
VAR_X
]
=
dx
;
x
&=
~
((
1
<<
desc
->
log2_chroma_w
)
-
1
);
return
ret
;
x
=
*
dx
=
av_clipd
(
*
dx
,
0
,
FFMAX
(
in
->
width
-
w
,
0
));
var_values
[
VAR_X
]
=
*
dx
;
x
&=
~
((
1
<<
s
->
desc
->
log2_chroma_w
)
-
1
);
if
((
ret
=
av_expr_parse_and_eval
(
&
dy
,
s
->
y_expr_str
,
if
((
ret
=
av_expr_parse_and_eval
(
dy
,
s
->
y_expr_str
,
var_names
,
var_values
,
NULL
,
NULL
,
NULL
,
NULL
,
NULL
,
0
,
ctx
))
<
0
)
goto
fail
;
y
=
dy
=
av_clipd
(
dy
,
0
,
FFMAX
(
in
->
height
-
h
,
0
));
var_values
[
VAR_Y
]
=
dy
;
y
&=
~
((
1
<<
desc
->
log2_chroma_h
)
-
1
);
return
ret
;
y
=
*
dy
=
av_clipd
(
*
dy
,
0
,
FFMAX
(
in
->
height
-
h
,
0
));
var_values
[
VAR_Y
]
=
*
dy
;
y
&=
~
((
1
<<
s
->
desc
->
log2_chroma_h
)
-
1
);
out
=
ff_get_video_buffer
(
outlink
,
outlink
->
w
,
outlink
->
h
);
if
(
!
out
)
{
ret
=
AVERROR
(
ENOMEM
);
goto
fail
;
return
ret
;
}
px
[
1
]
=
px
[
2
]
=
FF_CEIL_RSHIFT
(
x
,
desc
->
log2_chroma_w
);
px
[
1
]
=
px
[
2
]
=
FF_CEIL_RSHIFT
(
x
,
s
->
desc
->
log2_chroma_w
);
px
[
0
]
=
px
[
3
]
=
x
;
py
[
1
]
=
py
[
2
]
=
FF_CEIL_RSHIFT
(
y
,
desc
->
log2_chroma_h
);
py
[
1
]
=
py
[
2
]
=
FF_CEIL_RSHIFT
(
y
,
s
->
desc
->
log2_chroma_h
);
py
[
0
]
=
py
[
3
]
=
y
;
s
->
sws
=
sws_alloc_context
();
if
(
!
s
->
sws
)
{
ret
=
AVERROR
(
ENOMEM
);
goto
fail
;
return
ret
;
}
for
(
k
=
0
;
in
->
data
[
k
];
k
++
)
...
...
@@ -222,7 +199,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
av_opt_set_int
(
s
->
sws
,
"sws_flags"
,
SWS_BICUBIC
,
0
);
if
((
ret
=
sws_init_context
(
s
->
sws
,
NULL
,
NULL
))
<
0
)
goto
fail
;
return
ret
;
sws_scale
(
s
->
sws
,
(
const
uint8_t
*
const
*
)
&
input
,
in
->
linesize
,
0
,
h
,
out
->
data
,
out
->
linesize
);
...
...
@@ -230,27 +207,100 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
s
->
frame_count
++
;
ret
=
ff_filter_frame
(
outlink
,
out
);
out
=
NULL
;
if
(
ret
<
0
)
break
;
sws_freeContext
(
s
->
sws
);
s
->
sws
=
NULL
;
s
->
current_frame
++
;
return
ret
;
}
static
int
filter_frame
(
AVFilterLink
*
inlink
,
AVFrame
*
in
)
{
AVFilterContext
*
ctx
=
inlink
->
dst
;
AVFilterLink
*
outlink
=
ctx
->
outputs
[
0
];
ZPContext
*
s
=
ctx
->
priv
;
double
nb_frames
;
int
ret
;
if
(
s
->
in
)
{
av_frame_free
(
&
in
);
return
0
;
}
s
->
finished
=
0
;
s
->
var_values
[
VAR_IN_W
]
=
s
->
var_values
[
VAR_IW
]
=
in
->
width
;
s
->
var_values
[
VAR_IN_H
]
=
s
->
var_values
[
VAR_IH
]
=
in
->
height
;
s
->
var_values
[
VAR_OUT_W
]
=
s
->
var_values
[
VAR_OW
]
=
s
->
w
;
s
->
var_values
[
VAR_OUT_H
]
=
s
->
var_values
[
VAR_OH
]
=
s
->
h
;
s
->
var_values
[
VAR_IN
]
=
inlink
->
frame_count
+
1
;
s
->
var_values
[
VAR_ON
]
=
outlink
->
frame_count
+
1
;
s
->
var_values
[
VAR_PX
]
=
s
->
x
;
s
->
var_values
[
VAR_PY
]
=
s
->
y
;
s
->
var_values
[
VAR_X
]
=
0
;
s
->
var_values
[
VAR_Y
]
=
0
;
s
->
var_values
[
VAR_PZOOM
]
=
s
->
prev_zoom
;
s
->
var_values
[
VAR_ZOOM
]
=
1
;
s
->
var_values
[
VAR_PDURATION
]
=
s
->
prev_nb_frames
;
s
->
var_values
[
VAR_A
]
=
(
double
)
in
->
width
/
in
->
height
;
s
->
var_values
[
VAR_SAR
]
=
inlink
->
sample_aspect_ratio
.
num
?
(
double
)
inlink
->
sample_aspect_ratio
.
num
/
inlink
->
sample_aspect_ratio
.
den
:
1
;
s
->
var_values
[
VAR_DAR
]
=
s
->
var_values
[
VAR_A
]
*
s
->
var_values
[
VAR_SAR
];
s
->
var_values
[
VAR_HSUB
]
=
1
<<
s
->
desc
->
log2_chroma_w
;
s
->
var_values
[
VAR_VSUB
]
=
1
<<
s
->
desc
->
log2_chroma_h
;
if
((
ret
=
av_expr_parse_and_eval
(
&
nb_frames
,
s
->
duration_expr_str
,
var_names
,
s
->
var_values
,
NULL
,
NULL
,
NULL
,
NULL
,
NULL
,
0
,
ctx
))
<
0
)
{
av_frame_free
(
&
in
);
return
ret
;
}
s
->
var_values
[
VAR_DURATION
]
=
s
->
nb_frames
=
nb_frames
;
s
->
in
=
in
;
return
0
;
}
static
int
request_frame
(
AVFilterLink
*
outlink
)
{
AVFilterContext
*
ctx
=
outlink
->
src
;
ZPContext
*
s
=
ctx
->
priv
;
AVFrame
*
in
=
s
->
in
;
double
zoom
,
dx
,
dy
;
int
ret
;
if
(
in
)
{
ret
=
output_single_frame
(
ctx
,
in
,
s
->
var_values
,
s
->
current_frame
,
&
zoom
,
&
dx
,
&
dy
);
if
(
ret
<
0
)
goto
fail
;
}
if
(
s
->
current_frame
>=
s
->
nb_frames
)
{
s
->
x
=
dx
;
s
->
y
=
dy
;
s
->
prev_zoom
=
zoom
;
s
->
prev_nb_frames
=
nb_frames
;
s
->
prev_nb_frames
=
s
->
nb_frames
;
s
->
nb_frames
=
0
;
s
->
current_frame
=
0
;
av_frame_free
(
&
s
->
in
);
ret
=
0
;
s
->
finished
=
1
;
ret
=
ff_request_frame
(
ctx
->
inputs
[
0
]);
}
fail:
sws_freeContext
(
s
->
sws
);
s
->
sws
=
NULL
;
av_frame_free
(
&
out
);
av_frame_free
(
&
in
);
return
ret
;
}
static
int
poll_frame
(
AVFilterLink
*
link
)
{
ZPContext
*
s
=
link
->
src
->
priv
;
return
s
->
nb_frames
-
s
->
current_frame
;
}
static
int
query_formats
(
AVFilterContext
*
ctx
)
{
static
const
enum
AVPixelFormat
pix_fmts
[]
=
{
...
...
@@ -295,6 +345,8 @@ static const AVFilterPad outputs[] = {
.
name
=
"default"
,
.
type
=
AVMEDIA_TYPE_VIDEO
,
.
config_props
=
config_output
,
.
poll_frame
=
poll_frame
,
.
request_frame
=
request_frame
,
},
{
NULL
}
};
...
...
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