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avfilter/avf_showfreqs: make it possible to split channels

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2015-12-20 19:52:51 +01:00
parent 367ffa0c15
commit 9e569abe99
2 changed files with 28 additions and 2 deletions
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11
doc/filters.texi
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@ -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

17
libavfilter/avf_showfreqs.c
View File

@ -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;
}
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: