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Linshizhi
ffmpeg.wasm-core
Commits
012f04a2
Commit
012f04a2
authored
May 04, 2012
by
Anton Khirnov
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lavfi: autoinsert resample filter when necessary.
parent
d371e7b9
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1 changed file
with
42 additions
and
16 deletions
+42
-16
avfiltergraph.c
libavfilter/avfiltergraph.c
+42
-16
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libavfilter/avfiltergraph.c
View file @
012f04a2
...
...
@@ -152,8 +152,7 @@ AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name)
static
int
query_formats
(
AVFilterGraph
*
graph
,
AVClass
*
log_ctx
)
{
int
i
,
j
,
ret
;
int
scaler_count
=
0
;
char
inst_name
[
30
];
int
scaler_count
=
0
,
resampler_count
=
0
;
/* ask all the sub-filters for their supported media formats */
for
(
i
=
0
;
i
<
graph
->
filter_count
;
i
++
)
{
...
...
@@ -172,23 +171,50 @@ static int query_formats(AVFilterGraph *graph, AVClass *log_ctx)
if
(
link
&&
link
->
in_formats
!=
link
->
out_formats
)
{
if
(
!
avfilter_merge_formats
(
link
->
in_formats
,
link
->
out_formats
))
{
AVFilterContext
*
scale
;
AVFilterContext
*
convert
;
AVFilter
*
filter
;
AVFilterLink
*
inlink
,
*
outlink
;
char
scale_args
[
256
];
/* couldn't merge format lists. auto-insert scale filter */
snprintf
(
inst_name
,
sizeof
(
inst_name
),
"auto-inserted scaler %d"
,
scaler_count
++
);
snprintf
(
scale_args
,
sizeof
(
scale_args
),
"0:0:%s"
,
graph
->
scale_sws_opts
);
if
((
ret
=
avfilter_graph_create_filter
(
&
scale
,
avfilter_get_by_name
(
"scale"
),
inst_name
,
scale_args
,
NULL
,
graph
))
<
0
)
return
ret
;
if
((
ret
=
avfilter_insert_filter
(
link
,
scale
,
0
,
0
))
<
0
)
char
inst_name
[
30
];
/* couldn't merge format lists. auto-insert conversion filter */
switch
(
link
->
type
)
{
case
AVMEDIA_TYPE_VIDEO
:
snprintf
(
inst_name
,
sizeof
(
inst_name
),
"auto-inserted scaler %d"
,
scaler_count
++
);
snprintf
(
scale_args
,
sizeof
(
scale_args
),
"0:0:%s"
,
graph
->
scale_sws_opts
);
if
((
ret
=
avfilter_graph_create_filter
(
&
convert
,
avfilter_get_by_name
(
"scale"
),
inst_name
,
scale_args
,
NULL
,
graph
))
<
0
)
return
ret
;
break
;
case
AVMEDIA_TYPE_AUDIO
:
if
(
!
(
filter
=
avfilter_get_by_name
(
"resample"
)))
{
av_log
(
log_ctx
,
AV_LOG_ERROR
,
"'resample' filter "
"not present, cannot convert audio formats.
\n
"
);
return
AVERROR
(
EINVAL
);
}
snprintf
(
inst_name
,
sizeof
(
inst_name
),
"auto-inserted resampler %d"
,
resampler_count
++
);
if
((
ret
=
avfilter_graph_create_filter
(
&
convert
,
avfilter_get_by_name
(
"resample"
),
inst_name
,
NULL
,
NULL
,
graph
))
<
0
)
return
ret
;
break
;
default:
return
AVERROR
(
EINVAL
);
}
if
((
ret
=
avfilter_insert_filter
(
link
,
convert
,
0
,
0
))
<
0
)
return
ret
;
scale
->
filter
->
query_formats
(
scale
);
i
f
(((
link
=
scale
->
inputs
[
0
])
&&
!
avfilter_merge_formats
(
link
->
in_formats
,
link
->
out_formats
))
||
((
link
=
scale
->
outputs
[
0
])
&&
!
avfilter_merge_formats
(
link
->
in_formats
,
link
->
out_formats
)
))
{
convert
->
filter
->
query_formats
(
convert
);
i
nlink
=
convert
->
inputs
[
0
];
outlink
=
convert
->
outputs
[
0
];
if
(
!
avfilter_merge_formats
(
inlink
->
in_formats
,
inlink
->
out_formats
)
||
!
avfilter_merge_formats
(
outlink
->
in_formats
,
outlink
->
out_formats
))
{
av_log
(
log_ctx
,
AV_LOG_ERROR
,
"Impossible to convert between the formats supported by the filter "
"'%s' and the filter '%s'
\n
"
,
link
->
src
->
name
,
link
->
dst
->
name
);
...
...
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