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Linshizhi
ffmpeg.wasm-core
Commits
9e569abe
Commit
9e569abe
authored
Dec 20, 2015
by
Paul B Mahol
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avfilter/avf_showfreqs: make it possible to split channels
Signed-off-by:
Paul B Mahol
<
onemda@gmail.com
>
parent
367ffa0c
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2 changed files
with
28 additions
and
2 deletions
+28
-2
filters.texi
doc/filters.texi
+11
-0
avf_showfreqs.c
libavfilter/avf_showfreqs.c
+17
-2
No files found.
doc/filters.texi
View file @
9e569abe
...
...
@@ -14438,6 +14438,17 @@ Default is @code{1}, which means time averaging is disabled.
Specify list of colors separated by space or by '|' which will be used to
draw channel frequencies. Unrecognized or missing colors will be replaced
by white color.
@item cmode
Set channel display mode.
It accepts the following values:
@table @samp
@item combined
@item separate
@end table
Default is @code{combined}.
@end table
@section showspectrum
...
...
libavfilter/avf_showfreqs.c
View file @
9e569abe
...
...
@@ -34,6 +34,7 @@
#include "internal.h"
enum
DisplayMode
{
LINE
,
BAR
,
DOT
,
NB_MODES
};
enum
ChannelMode
{
COMBINED
,
SEPARATE
,
NB_CMODES
};
enum
FrequencyScale
{
FS_LINEAR
,
FS_LOG
,
FS_RLOG
,
NB_FSCALES
};
enum
AmplitudeScale
{
AS_LINEAR
,
AS_SQRT
,
AS_CBRT
,
AS_LOG
,
NB_ASCALES
};
enum
WindowFunc
{
WFUNC_RECT
,
WFUNC_HANNING
,
WFUNC_HAMMING
,
WFUNC_BLACKMAN
,
...
...
@@ -45,6 +46,7 @@ typedef struct ShowFreqsContext {
const
AVClass
*
class
;
int
w
,
h
;
int
mode
;
int
cmode
;
int
fft_bits
;
int
ascale
,
fscale
;
int
avg
;
...
...
@@ -115,6 +117,9 @@ static const AVOption showfreqs_options[] = {
{
"overlap"
,
"set window overlap"
,
OFFSET
(
overlap
),
AV_OPT_TYPE_FLOAT
,
{.
dbl
=
1
.},
0
.,
1
.,
FLAGS
},
{
"averaging"
,
"set time averaging"
,
OFFSET
(
avg
),
AV_OPT_TYPE_INT
,
{.
i64
=
1
},
0
,
INT32_MAX
,
FLAGS
},
{
"colors"
,
"set channels colors"
,
OFFSET
(
colors
),
AV_OPT_TYPE_STRING
,
{.
str
=
"red|green|blue|yellow|orange|lime|pink|magenta|brown"
},
0
,
0
,
FLAGS
},
{
"cmode"
,
"set channel mode"
,
OFFSET
(
cmode
),
AV_OPT_TYPE_INT
,
{.
i64
=
COMBINED
},
0
,
NB_CMODES
-
1
,
FLAGS
,
"cmode"
},
{
"combined"
,
"show all channels in same window"
,
0
,
AV_OPT_TYPE_CONST
,
{.
i64
=
COMBINED
},
0
,
0
,
FLAGS
,
"cmode"
},
{
"separate"
,
"show each channel in own window"
,
0
,
AV_OPT_TYPE_CONST
,
{.
i64
=
SEPARATE
},
0
,
0
,
FLAGS
,
"cmode"
},
{
NULL
}
};
...
...
@@ -358,6 +363,7 @@ static inline void plot_freq(ShowFreqsContext *s, int ch,
const
float
avg
=
s
->
avg_data
[
ch
][
f
];
const
float
bsize
=
get_bsize
(
s
,
f
);
const
int
sx
=
get_sx
(
s
,
f
);
int
end
=
outlink
->
h
;
int
x
,
y
,
i
;
switch
(
s
->
ascale
)
{
...
...
@@ -374,7 +380,16 @@ static inline void plot_freq(ShowFreqsContext *s, int ch,
a
=
1
.
0
-
a
;
break
;
}
y
=
a
*
outlink
->
h
-
1
;
switch
(
s
->
cmode
)
{
case
COMBINED
:
y
=
a
*
outlink
->
h
-
1
;
break
;
case
SEPARATE
:
end
=
(
outlink
->
h
/
s
->
nb_channels
)
*
(
ch
+
1
);
y
=
(
outlink
->
h
/
s
->
nb_channels
)
*
ch
+
a
*
(
outlink
->
h
/
s
->
nb_channels
)
-
1
;
break
;
}
if
(
y
<
0
)
return
;
...
...
@@ -410,7 +425,7 @@ static inline void plot_freq(ShowFreqsContext *s, int ch,
break
;
case
BAR
:
for
(
x
=
sx
;
x
<
sx
+
bsize
&&
x
<
w
;
x
++
)
for
(
i
=
y
;
i
<
outlink
->
h
;
i
++
)
for
(
i
=
y
;
i
<
end
;
i
++
)
draw_dot
(
out
,
x
,
i
,
fg
);
break
;
case
DOT
:
...
...
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