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a-Reverb: Interpolate parameters, stable version

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This commit is contained in:
Damien Zammit 2016-07-13 23:58:07 +10:00
parent 7dc6c0fc08
commit 0b3d09b011
2 changed files with 16 additions and 10 deletions
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20
libs/plugins/a-reverb.lv2/a-reverb.c
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@ -19,6 +19,10 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE // needed for M_PI
#endif
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
@ -28,7 +32,6 @@
#define RV_NZ 7
#define DENORMAL_PROTECT (1e-14)
typedef struct {
float* delays[2][RV_NZ]; /**< delay line buffer */
@ -249,6 +252,7 @@ typedef struct {
float v_mix;
float v_roomsz;
float srate;
b_reverb r;
} AReverb;
@ -270,6 +274,7 @@ instantiate (const LV2_Descriptor* descriptor,
// these are set in initReverb()
self->v_roomsz = 0.75;
self->v_mix = 0.1;
self->srate = rate;
return (LV2_Handle)self;
}
@ -313,15 +318,16 @@ run (LV2_Handle instance, uint32_t n_samples)
float* const output0 = self->output0;
float* const output1 = self->output1;
// TODO interpolate
// 25Hz update
const float tau = (1.0 - exp(-2.0 * M_PI * n_samples * 25 / self->srate));
if (*self->mix != self->v_mix) {
self->v_mix = *self->mix;
const float u = self->r.wet + self->r.dry;
self->r.wet = self->v_mix * u;
self->r.dry = u - (self->v_mix * u);
self->v_mix += tau * ( *self->mix - self->v_mix);
self->r.wet = self->v_mix;
self->r.dry = 1.0 - self->v_mix;
}
if (*self->roomsz != self->v_roomsz) {
self->v_roomsz = *self->roomsz;
self->v_roomsz += tau * ( *self->roomsz - self->v_roomsz);
self->r.gain[0] = 0.773 * self->v_roomsz;
self->r.gain[1] = 0.802 * self->v_roomsz;
self->r.gain[2] = 0.753 * self->v_roomsz;

6
libs/plugins/a-reverb.lv2/a-reverb.ttl.in
View File

@ -20,7 +20,7 @@
doap:maintainer <http://ardour.org/credits.html>
doap:license <http://usefulinc.com/doap/licenses/gpl> ;
lv2:microVersion 0 ; lv2:minorVersion 1 ;
lv2:microVersion 0 ; lv2:minorVersion 2 ;
lv2:optionalFeature lv2:hardRTCapable ;
lv2:port
@ -56,8 +56,8 @@
a lv2:InputPort ,
lv2:ControlPort ;
lv2:index 4 ;
lv2:symbol "mix" ;
lv2:name "Dry/Wet";
lv2:symbol "blend" ;
lv2:name "Blend";
lv2:default 0.3;
lv2:minimum 0.0 ;
lv2:maximum 1.0 ;