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handle LADSPA's port range crap

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Connor Olding 2015-04-04 02:44:33 -07:00
parent e943a99966
commit e6ab4e4473
1 changed files with 48 additions and 1 deletions
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49
util/bench.c
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@ -3,6 +3,7 @@
#include <stdio.h>
#include <assert.h>
#include <time.h>
#include <math.h>
#include "dlfcn.h"
#include "ladspa.h"
@ -39,6 +40,52 @@ load_ladspa(char *path)
return d;
}
static float
between(float percent, float min, float max, int logscale)
{
if (logscale)
return log(min/percent)/log(min/max);
else
return (min - percent)/(min - max);
}
static float
get_default(LADSPA_PortRangeHint hint)
{
float x = 0;
int hd = hint.HintDescriptor;
float min = hint.LowerBound;
float max = hint.UpperBound;
float logscale = LADSPA_IS_HINT_LOGARITHMIC(hd);
if (LADSPA_IS_HINT_DEFAULT_0(hd))
x = 0;
if (LADSPA_IS_HINT_DEFAULT_1(hd))
x = 1;
if (LADSPA_IS_HINT_DEFAULT_100(hd))
x = 100;
if (LADSPA_IS_HINT_DEFAULT_440(hd))
x = 440;
if (LADSPA_IS_HINT_DEFAULT_MINIMUM(hd))
x = min;
if (LADSPA_IS_HINT_DEFAULT_LOW(hd))
x = between(0.25, min, max, logscale);
if (LADSPA_IS_HINT_DEFAULT_MIDDLE(hd))
x = between(0.50, min, max, logscale);
if (LADSPA_IS_HINT_DEFAULT_HIGH(hd))
x = between(0.75, min, max, logscale);
if (LADSPA_IS_HINT_DEFAULT_MAXIMUM(hd))
x = max;
if (LADSPA_IS_HINT_INTEGER(hd))
x = round(x);
if (LADSPA_IS_HINT_TOGGLED(hd)) {
float mid = between(0.50, min, max, logscale);
x = x >= mid ? max : min;
}
if (x < min) x = min;
if (x > max) x = max;
return x;
}
int
main(int argc, char **argv)
{
@ -62,7 +109,7 @@ main(int argc, char **argv)
d->connect_port(h, i, audio_buffer + a++*BLOCK_SIZE);
} else {
float *x = alloca(sizeof(float));
*x = 0;
*x = get_default(d->PortRangeHints[i]);
d->connect_port(h, i, x);
}
}