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click-free a-reverb bypass

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This commit is contained in:
Robin Gareus
2016-08-27 14:09:47 +02:00
parent 935fd3b32f
commit 36776bafcd
2 changed files with 62 additions and 15 deletions
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64
libs/plugins/a-reverb.lv2/a-reverb.c
View File

@@ -239,6 +239,7 @@ typedef enum {
AR_OUTPUT1 = 3,
AR_MIX = 4,
AR_ROOMSZ = 5,
AR_ENABLE = 6,
} PortIndex;
typedef struct {
@@ -249,10 +250,12 @@ typedef struct {
float* mix;
float* roomsz;
float* enable;
float v_mix;
float v_roomsz;
float srate;
float tau;
b_reverb r;
} AReverb;
@@ -275,6 +278,7 @@ instantiate (const LV2_Descriptor* descriptor,
self->v_roomsz = 0.75;
self->v_mix = 0.1;
self->srate = rate;
self->tau = 1.f - expf (-2.f * M_PI * 64.f * 15.f / self->srate); // 15Hz, 64fpp
return (LV2_Handle)self;
}
@@ -305,6 +309,9 @@ connect_port (LV2_Handle instance,
case AR_ROOMSZ:
self->roomsz = (float*)data;
break;
case AR_ENABLE:
self->enable = (float*)data;
break;
}
}
@@ -318,23 +325,52 @@ run (LV2_Handle instance, uint32_t n_samples)
float* const output0 = self->output0;
float* const output1 = self->output1;
// 15Hz time constant
const float tau = (1.0 - exp(-2.0 * M_PI * n_samples * 15. / self->srate));
const float tau = self->tau;
const float mix = *self->enable <= 0 ? 0 : *self->mix;
if (*self->mix != self->v_mix) {
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 += 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;
self->r.gain[3] = 0.733 * self->v_roomsz;
uint32_t remain = n_samples;
uint32_t offset = 0;
uint32_t iterpolate = 0;
if (fabsf (mix - self->v_mix) < .01) { // 40dB
self->v_mix = mix;
} else {
iterpolate |= 1;
}
reverb (&self->r, input0, input1, output0, output1, n_samples);
if (fabsf (*self->roomsz - self->v_roomsz) < .01) {
self->v_roomsz = *self->roomsz;
} else {
iterpolate |= 2;
}
while (remain > 0) {
uint32_t p_samples = remain;
if (iterpolate && p_samples > 64) {
p_samples = 64;
}
if (iterpolate & 1) {
self->v_mix += tau * (mix - self->v_mix);
self->r.wet = self->v_mix;
self->r.dry = 1.0 - self->v_mix;
}
if (iterpolate & 2) {
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;
self->r.gain[3] = 0.733 * self->v_roomsz;
}
reverb (&self->r,
&input0[offset], &input1[offset],
&output0[offset], &output1[offset],
p_samples);
offset += p_samples;
remain -= p_samples;
}
}
static void

13
libs/plugins/a-reverb.lv2/a-reverb.ttl.in
View File

@@ -72,4 +72,15 @@
lv2:default 0.5 ;
lv2:minimum 0.5 ;
lv2:maximum 1.0 ;
] .
],
[
a lv2:InputPort, lv2:ControlPort ;
lv2:index 6 ;
lv2:name "Enable" ;
lv2:symbol "enable" ;
lv2:default 1 ;
lv2:minimum 0 ;
lv2:maximum 1 ;
lv2:portProperty lv2:integer, lv2:toggled ;
lv2:designation <http://ardour.org/lv2/processing#enable>;
];