Rx3/drmr2
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Add gtk ui and make pan controls work

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This commit is contained in:
Nick Lanham
2012-02-13 11:24:26 +01:00
parent d36035e0ab
commit c8a7423e3e
6 changed files with 807 additions and 87 deletions
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38
drmr.c
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@@ -98,7 +98,10 @@ instantiate(const LV2_Descriptor* descriptor,
drmr->gains = malloc(32*sizeof(float*));
drmr->pans = malloc(32*sizeof(float*));
for(i = 0;i<16;i++) drmr->gains[i] = NULL;
for(i = 0;i<32;i++) {
drmr->gains[i] = NULL;
drmr->pans[i] = NULL;
}
return (LV2_Handle)drmr;
}
@@ -130,11 +133,17 @@ connect_port(LV2_Handle instance,
int goff = port_index - DRMR_GAIN_ONE;
drmr->gains[goff] = (float*)data;
}
if (port_index >= DRMR_PAN_ONE && port_index <= DRMR_PAN_THIRTYTWO) {
int poff = port_index - DRMR_PAN_ONE;
drmr->pans[poff] = (float*)data;
}
}
#define DB3SCALE -0.8317830986718104f
#define DB3SCALEPO 1.8317830986718104f
// taken from lv2 example amp plugin
#define DB_CO(g) ((g) > -90.0f ? powf(10.0f, (g) * 0.05f) : 0.0f)
#define DB_CO(g) ((g) > GAIN_MIN ? powf(10.0f, (g) * 0.05f) : 0.0f)
static void run(LV2_Handle instance, uint32_t n_samples) {
int i,kitInt;
@@ -187,24 +196,31 @@ static void run(LV2_Handle instance, uint32_t n_samples) {
int pos,lim;
drmr_sample* cs = drmr->samples+i;
if (cs->active) {
float gain;
if (i < 32)
gain = DB_CO(*(drmr->gains[i]));
else
gain = DB_CO(0.0f);
float coef_right, coef_left;
if (i < 32) {
float gain = DB_CO(*(drmr->gains[i]));
float pan_right = ((*drmr->pans[i])+1)/2.0f;
float pan_left = 1-pan_right;
coef_right = (pan_right * (DB3SCALE * pan_right + DB3SCALEPO))*gain;
coef_left = (pan_left * (DB3SCALE * pan_left + DB3SCALEPO))*gain;
}
else {
coef_right = coef_left = 1.0f;
}
if (cs->info.channels == 1) { // play mono sample
lim = (n_samples < (cs->limit - cs->offset)?n_samples:(cs->limit-cs->offset));
for(pos = 0;pos < lim;pos++) {
drmr->left[pos] += cs->data[cs->offset]*gain;
drmr->right[pos] += cs->data[cs->offset]*gain;
drmr->left[pos] += cs->data[cs->offset]*coef_left;
drmr->right[pos] += cs->data[cs->offset]*coef_right;
cs->offset++;
}
} else { // play stereo sample
lim = (cs->limit-cs->offset)/cs->info.channels;
if (lim > n_samples) lim = n_samples;
for (pos=0;pos<lim;pos++) {
drmr->left[pos] += cs->data[cs->offset++]*gain;
drmr->right[pos] += cs->data[cs->offset++]*gain;
drmr->left[pos] += cs->data[cs->offset++]*coef_left;
drmr->right[pos] += cs->data[cs->offset++]*coef_right;
}
}
if (cs->offset >= cs->limit) cs->active = 0;