mirrors/librempeg
1
0
Fork 0
mirror of https://github.com/librempeg/librempeg synced 2024-11-22 18:49:58 +00:00
Code Issues Packages Projects Releases Wiki Activity

avfilter/avf_showcwt: add qdrt frequency scale

Browse Source
This commit is contained in:
Paul B Mahol 2023-07-09 20:50:04 +02:00
parent aee8689ba5
commit fcbee7efdf
2 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
doc/filters.texi
View File

@ -30711,6 +30711,7 @@ Set the frequency scale used. Allowed values are:
@item erbs
@item sqrt
@item cbrt
@item qdrt
@end table
Default value is @code{linear}.

10
libavfilter/avf_showcwt.c
View File

@ -42,6 +42,7 @@ enum FrequencyScale {
FSCALE_ERBS,
FSCALE_SQRT,
FSCALE_CBRT,
FSCALE_QDRT,
NB_FSCALE
};
@ -131,6 +132,7 @@ static const AVOption showcwt_options[] = {
{ "erbs", "erbs", 0, AV_OPT_TYPE_CONST,{.i64=FSCALE_ERBS}, 0, 0, FLAGS, "scale" },
{ "sqrt", "sqrt", 0, AV_OPT_TYPE_CONST,{.i64=FSCALE_SQRT}, 0, 0, FLAGS, "scale" },
{ "cbrt", "cbrt", 0, AV_OPT_TYPE_CONST,{.i64=FSCALE_CBRT}, 0, 0, FLAGS, "scale" },
{ "qdrt", "qdrt", 0, AV_OPT_TYPE_CONST,{.i64=FSCALE_QDRT}, 0, 0, FLAGS, "scale" },
{ "min", "set minimum frequency", OFFSET(minimum_frequency), AV_OPT_TYPE_FLOAT, {.dbl = 20.}, 1, 2000, FLAGS },
{ "max", "set maximum frequency", OFFSET(maximum_frequency), AV_OPT_TYPE_FLOAT, {.dbl = 20000.}, 0, 192000, FLAGS },
{ "logb", "set logarithmic basis", OFFSET(logarithmic_basis), AV_OPT_TYPE_FLOAT, {.dbl = 0.0001}, 0, 1, FLAGS },
@ -253,6 +255,10 @@ static void frequency_band(float *frequency_band,
frequency = frequency * frequency * frequency;
frequency_derivative *= 3.f * powf(frequency, 2.f / 3.f);
break;
case FSCALE_QDRT:
frequency = frequency * frequency * frequency * frequency;
frequency_derivative *= 4.f * powf(frequency, 3.f / 4.f);
break;
}
frequency_band[y*2 ] = frequency;
@ -700,6 +706,10 @@ static int config_output(AVFilterLink *outlink)
minimum_frequency = cbrtf(minimum_frequency);
maximum_frequency = cbrtf(maximum_frequency);
break;
case FSCALE_QDRT:
minimum_frequency = powf(minimum_frequency, 0.25f);
maximum_frequency = powf(maximum_frequency, 0.25f);
break;
}
frequency_band(s->frequency_band,