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#include "mdaPianoVoice.h"
mdaPianoVoice::mdaPianoVoice(double rate, short * samples, KGRP * master_kgrp) {
//set tuning
Fs = rate;
iFs = 1.0f/Fs;
waves = samples;
kgrp = master_kgrp;
default_preset[p_offset(p_envelope_decay)] = 0.500f;
default_preset[p_offset(p_envelope_release)] = 0.500f;
default_preset[p_offset(p_hardness_offset)] = 0.500f;
default_preset[p_offset(p_velocity_to_hardness)] = 0.500f;
default_preset[p_offset(p_muffling_filter)] = 0.803f;
default_preset[p_offset(p_velocity_to_muffling)] = 0.251f;
default_preset[p_offset(p_velocity_sensitivity)] = 0.376f;
default_preset[p_offset(p_stereo_width)] = 0.500f;
default_preset[p_offset(p_polyphony)] = 0.330f;
default_preset[p_offset(p_fine_tuning)] = 0.500f;
default_preset[p_offset(p_random_detuning)] = 0.246f;
default_preset[p_offset(p_stretch_tuning)] = 0.500f;
reset();
}
void mdaPianoVoice::reset() {
env = 0.0f;
dec = 0.99f;
muff = 160.0f;
volume = 0.2f;
sustain = 0;
}
float mdaPianoVoice::p_helper(unsigned short id, Param d) {
if (d == Default)
return default_preset[p_offset(id)];
else
return *p(id);
}
mdaPianoVoice::on(unsigned char note, unsigned char velocity)
{
// TODO: replace with this voice's local copy
float * param = programs[curProgram].param;
float l=99.0f;
uint32_t v, vl=0, k, s;
if(velocity>0)
{
// TODO: move this to mdaPiano.cpp
/*
if(activevoices < poly) //add a note
{
vl = activevoices;
activevoices++;
}
else //steal a note
{
for(v=0; v<poly; v++) //find quietest voice
{
if(voice[v].env < l) { l = voice[v].env; vl = v; }
}
}
*/
k = (note - 60) * (note - 60);
l = fine + random * ((float)(k % 13) - 6.5f); //random & fine tune
if(note > 60) l += stretch * (float)k; //stretch
s = size;
if(velocity > 40) s += (uint32_t)(sizevel * (float)(velocity - 40));
k = 0;
while(note > (kgrp[k].high + s)) k++; //find keygroup
l += (float)(note - kgrp[k].root); //pitch
l = 22050.0f * iFs * (float)exp(0.05776226505 * l);
voice[vl].delta = (uint32_t)(65536.0f * l);
voice[vl].frac = 0;
voice[vl].pos = kgrp[k].pos;
voice[vl].end = kgrp[k].end;
voice[vl].loop = kgrp[k].loop;
voice[vl].env = (0.5f + velsens) * (float)pow(0.0078f * velocity, velsens); //velocity
l = 50.0f + param[4] * param[4] * muff + muffvel * (float)(velocity - 64); //muffle
if(l < (55.0f + 0.25f * (float)note)) l = 55.0f + 0.25f * (float)note;
if(l > 210.0f) l = 210.0f;
voice[vl].ff = l * l * iFs;
voice[vl].f0 = voice[vl].f1 = 0.0f;
voice[vl].note = note; //note->pan
if(note < 12) note = 12;
if(note > 108) note = 108;
l = volume * trim;
voice[vl].outr = l + l * width * (float)(note - 60);
voice[vl].outl = l + l - voice[vl].outr;
if(note < 44) note = 44; //limit max decay length
l = 2.0f * param[0];
if(l < 1.0f) l += 0.25f - 0.5f * param[0];
voice[vl].dec = (float)exp(-iFs * exp(-0.6 + 0.033 * (double)note - l));
}
else //note off
{
// TODO: move the loop to mdaPiano.cpp
for(v=0; v<NVOICES; v++) if(voice[v].note==note) //any voices playing that note?
{
if(sustain==0)
{
if(note < 94 || note == SUSTAIN) //no release on highest notes
voice[v].dec = (float)exp(-iFs * exp(2.0 + 0.017 * (double)note - 2.0 * param[1]));
}
else voice[v].note = SUSTAIN;
}
}
}
void mdaPianoVoice::process(float **inputs, float **outputs, uint32_t sampleFrames)
{
float* out0 = outputs[0];
float* out1 = outputs[1];
uint32_t event=0, frame=0, frames, v;
float x, l, r;
uint32_t i;
while(frame<sampleFrames)
{
frames = notes[event++];
if(frames>sampleFrames) frames = sampleFrames;
frames -= frame;
frame += frames;
while(--frames>=0)
{
VOICE *V = voice;
l = r = 0.0f;
for(v=0; v<activevoices; v++)
{
V->frac += V->delta; //integer-based linear interpolation
V->pos += V->frac >> 16;
V->frac &= 0xFFFF;
if(V->pos > V->end) V->pos -= V->loop;
i = waves[V->pos];
i = (i << 7) + (V->frac >> 9) * (waves[V->pos + 1] - i) + 0x40400000;
x = V->env * (*(float *)&i - 3.0f); //fast int->float
/////////////////////
//TODO: This was used in processReplacing instead of the above
/*
//i = (i << 7) + (V->frac >> 9) * (waves[V->pos + 1] - i) + 0x40400000; //not working on intel mac !?!
i = waves[V->pos] + ((V->frac * (waves[V->pos + 1] - waves[V->pos])) >> 16);
x = V->env * (float)i / 32768.0f;
//x = V->env * (*(float *)&i - 3.0f); //fast int->float
*/
/////////////////////
V->env = V->env * V->dec; //envelope
V->f0 += V->ff * (x + V->f1 - V->f0); //muffle filter
V->f1 = x;
l += V->outl * V->f0;
r += V->outr * V->f0;
//TODO: this was used in processReplacing
/////////////////////
/*
if(!(l > -2.0f) || !(l < 2.0f))
{
printf("what is this shit? %d, %f, %f\n", i, x, V->f0);
l = 0.0f;
}
if(!(r > -2.0f) || !(r < 2.0f))
{
r = 0.0f;
}
*/
/////////////////////
V++;
}
comb[cpos] = l + r;
++cpos &= cmax;
x = cdep * comb[cpos]; //stereo simulator
// TODO: processReplacing simply assigned instead of adding
*out0++ += l + x;
*out1++ += r - x;
}
if(frame<sampleFrames)
{
uint32_t note = notes[event++];
uint32_t vel = notes[event++];
noteOn(note, vel);
}
}
for(v=0; v<activevoices; v++) if(voice[v].env < SILENCE) voice[v] = voice[--activevoices];
notes[0] = EVENTS_DONE; //mark events buffer as done
}
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