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avfilter/showcqt: make minimum timeclamp option lower 

high basefreq does not require high timeclamp

Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>
This commit is contained in:
Muhammad Faiz 2017-01-30 05:41:49 +07:00
parent 2ae8278832
commit c4a3526b57
2 changed files with 4 additions and 4 deletions
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2
doc/filters.texi
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@ -17029,7 +17029,7 @@ Specify the transform timeclamp. At low frequency, there is trade-off between
accuracy in time domain and frequency domain. If timeclamp is lower,
event in time domain is represented more accurately (such as fast bass drum),
otherwise event in frequency domain is represented more accurately
(such as bass guitar). Acceptable range is @code{[0.1, 1]}. Default value is @code{0.17}.
(such as bass guitar). Acceptable range is @code{[0.002, 1]}. Default value is @code{0.17}.
@item basefreq
Specify the transform base frequency. Default value is @code{20.01523126408007475},

6
libavfilter/avf_showcqt.c
View File

@ -76,8 +76,8 @@ static const AVOption showcqt_options[] = {
{ "bar_g", "set bargraph gamma", OFFSET(bar_g), AV_OPT_TYPE_FLOAT, { .dbl = 1.0 }, 1.0, 7.0, FLAGS },
{ "gamma2", "set bargraph gamma", OFFSET(bar_g), AV_OPT_TYPE_FLOAT, { .dbl = 1.0 }, 1.0, 7.0, FLAGS },
{ "bar_t", "set bar transparency", OFFSET(bar_t), AV_OPT_TYPE_FLOAT, { .dbl = 1.0 }, 0.0, 1.0, FLAGS },
{ "timeclamp", "set timeclamp", OFFSET(timeclamp), AV_OPT_TYPE_DOUBLE, { .dbl = 0.17 }, 0.1, 1.0, FLAGS },
{ "tc", "set timeclamp", OFFSET(timeclamp), AV_OPT_TYPE_DOUBLE, { .dbl = 0.17 }, 0.1, 1.0, FLAGS },
{ "timeclamp", "set timeclamp", OFFSET(timeclamp), AV_OPT_TYPE_DOUBLE, { .dbl = 0.17 }, 0.002, 1.0, FLAGS },
{ "tc", "set timeclamp", OFFSET(timeclamp), AV_OPT_TYPE_DOUBLE, { .dbl = 0.17 }, 0.002, 1.0, FLAGS },
{ "basefreq", "set base frequency", OFFSET(basefreq), AV_OPT_TYPE_DOUBLE, { .dbl = BASEFREQ }, 10.0, 100000.0, FLAGS },
{ "endfreq", "set end frequency", OFFSET(endfreq), AV_OPT_TYPE_DOUBLE, { .dbl = ENDFREQ }, 10.0, 100000.0, FLAGS },
{ "coeffclamp", "set coeffclamp", OFFSET(coeffclamp), AV_OPT_TYPE_FLOAT, { .dbl = 1.0 }, 0.1, 10.0, FLAGS },
@ -1366,7 +1366,7 @@ static int config_output(AVFilterLink *outlink)
if ((ret = init_volume(s)) < 0)
return ret;
s->fft_bits = ceil(log2(inlink->sample_rate * s->timeclamp));
s->fft_bits = FFMAX(ceil(log2(inlink->sample_rate * s->timeclamp)), 4);
s->fft_len = 1 << s->fft_bits;
av_log(ctx, AV_LOG_INFO, "fft_len = %d, cqt_len = %d.\n", s->fft_len, s->cqt_len);