e23dc78dba3b07f7ffe34e315a78de58a0c5c707
[software/lv2-mdametapiano.git] / src / mdaPianoVoice.cpp
1 #include "mdaPianoVoice.h"
2
3 mdaPianoVoice::mdaPianoVoice(double rate, short * samples, KGRP * master_kgrp) {
4 //set tuning
5 Fs = rate;
6 iFs = 1.0f/Fs;
7
8 waves = samples;
9 kgrp = master_kgrp;
10
11 default_preset[p_offset(p_envelope_decay)] = 0.500f;
12 default_preset[p_offset(p_envelope_release)] = 0.500f;
13 default_preset[p_offset(p_hardness_offset)] = 0.500f;
14 default_preset[p_offset(p_velocity_to_hardness)] = 0.500f;
15 default_preset[p_offset(p_muffling_filter)] = 0.803f;
16 default_preset[p_offset(p_velocity_to_muffling)] = 0.251f;
17 default_preset[p_offset(p_velocity_sensitivity)] = 0.376f;
18 default_preset[p_offset(p_stereo_width)] = 0.500f;
19 default_preset[p_offset(p_polyphony)] = 0.330f;
20 default_preset[p_offset(p_fine_tuning)] = 0.500f;
21 default_preset[p_offset(p_random_detuning)] = 0.246f;
22 default_preset[p_offset(p_stretch_tuning)] = 0.500f;
23
24 reset();
25 }
26
27
28 void mdaPianoVoice::reset() {
29 env = 0.0f;
30 dec = 0.99f;
31 muff = 160.0f;
32 volume = 0.2f;
33 sustain = 0;
34 m_key = LV2::INVALID_KEY;
35 }
36
37
38 float mdaPianoVoice::p_helper(unsigned short id, Param d) {
39 if (d == Default)
40 return default_preset[p_offset(id)];
41 else
42 return *p(id);
43 }
44
45
46 void mdaPianoVoice::on(unsigned char note, unsigned char velocity)
47 {
48 // store key that turned this voice on (used in 'get_key')
49 m_key = key;
50
51 // TODO: replace with this voice's local copy
52 float * param = programs[curProgram].param;
53 float l=99.0f;
54 uint32_t v, vl=0, k, s;
55
56 if(velocity>0)
57 {
58 // TODO: move this to mdaPiano.cpp
59 /*
60 if(activevoices < poly) //add a note
61 {
62 vl = activevoices;
63 activevoices++;
64 }
65 else //steal a note
66 {
67 for(v=0; v<poly; v++) //find quietest voice
68 {
69 if(voice[v].env < l) { l = voice[v].env; vl = v; }
70 }
71 }
72 */
73
74 k = (note - 60) * (note - 60);
75 l = fine + random * ((float)(k % 13) - 6.5f); //random & fine tune
76 if(note > 60) l += stretch * (float)k; //stretch
77
78 s = size;
79 if(velocity > 40) s += (uint32_t)(sizevel * (float)(velocity - 40));
80
81 k = 0;
82 while(note > (kgrp[k].high + s)) k++; //find keygroup
83
84 l += (float)(note - kgrp[k].root); //pitch
85 l = 22050.0f * iFs * (float)exp(0.05776226505 * l);
86 voice[vl].delta = (uint32_t)(65536.0f * l);
87 voice[vl].frac = 0;
88 voice[vl].pos = kgrp[k].pos;
89 voice[vl].end = kgrp[k].end;
90 voice[vl].loop = kgrp[k].loop;
91
92 voice[vl].env = (0.5f + velsens) * (float)pow(0.0078f * velocity, velsens); //velocity
93
94 l = 50.0f + param[4] * param[4] * muff + muffvel * (float)(velocity - 64); //muffle
95 if(l < (55.0f + 0.25f * (float)note)) l = 55.0f + 0.25f * (float)note;
96 if(l > 210.0f) l = 210.0f;
97 voice[vl].ff = l * l * iFs;
98 voice[vl].f0 = voice[vl].f1 = 0.0f;
99
100 voice[vl].note = note; //note->pan
101 if(note < 12) note = 12;
102 if(note > 108) note = 108;
103 l = volume * trim;
104 voice[vl].outr = l + l * width * (float)(note - 60);
105 voice[vl].outl = l + l - voice[vl].outr;
106
107 if(note < 44) note = 44; //limit max decay length
108 l = 2.0f * param[0];
109 if(l < 1.0f) l += 0.25f - 0.5f * param[0];
110 voice[vl].dec = (float)exp(-iFs * exp(-0.6 + 0.033 * (double)note - l));
111 }
112 else //note off
113 {
114 // TODO: move the loop to mdaPiano.cpp
115 for(v=0; v<NVOICES; v++) if(voice[v].note==note) //any voices playing that note?
116 {
117 if(sustain==0)
118 {
119 if(note < 94 || note == SUSTAIN) //no release on highest notes
120 voice[v].dec = (float)exp(-iFs * exp(2.0 + 0.017 * (double)note - 2.0 * param[1]));
121 }
122 else voice[v].note = SUSTAIN;
123 }
124 }
125 }
126
127
128 void mdaPianoVoice::process(float **inputs, float **outputs, uint32_t sampleFrames)
129 {
130 float* out0 = outputs[0];
131 float* out1 = outputs[1];
132 uint32_t event=0, frame=0, frames, v;
133 float x, l, r;
134 uint32_t i;
135
136 while(frame<sampleFrames)
137 {
138 frames = notes[event++];
139 if(frames>sampleFrames) frames = sampleFrames;
140 frames -= frame;
141 frame += frames;
142
143 while(--frames>=0)
144 {
145 VOICE *V = voice;
146 l = r = 0.0f;
147
148 for(v=0; v<activevoices; v++)
149 {
150 V->frac += V->delta; //integer-based linear interpolation
151 V->pos += V->frac >> 16;
152 V->frac &= 0xFFFF;
153 if(V->pos > V->end) V->pos -= V->loop;
154
155 i = waves[V->pos];
156 i = (i << 7) + (V->frac >> 9) * (waves[V->pos + 1] - i) + 0x40400000;
157 x = V->env * (*(float *)&i - 3.0f); //fast int->float
158
159 /////////////////////
160 //TODO: This was used in processReplacing instead of the above
161 /*
162 //i = (i << 7) + (V->frac >> 9) * (waves[V->pos + 1] - i) + 0x40400000; //not working on intel mac !?!
163 i = waves[V->pos] + ((V->frac * (waves[V->pos + 1] - waves[V->pos])) >> 16);
164 x = V->env * (float)i / 32768.0f;
165 //x = V->env * (*(float *)&i - 3.0f); //fast int->float
166 */
167 /////////////////////
168
169 V->env = V->env * V->dec; //envelope
170 V->f0 += V->ff * (x + V->f1 - V->f0); //muffle filter
171 V->f1 = x;
172
173 l += V->outl * V->f0;
174 r += V->outr * V->f0;
175
176 //TODO: this was used in processReplacing
177 /////////////////////
178 /*
179 if(!(l > -2.0f) || !(l < 2.0f))
180 {
181 printf("what is this shit? %d, %f, %f\n", i, x, V->f0);
182 l = 0.0f;
183 }
184 if(!(r > -2.0f) || !(r < 2.0f))
185 {
186 r = 0.0f;
187 }
188 */
189 /////////////////////
190
191 V++;
192 }
193 comb[cpos] = l + r;
194 ++cpos &= cmax;
195 x = cdep * comb[cpos]; //stereo simulator
196
197 // TODO: processReplacing simply assigned instead of adding
198 *out0++ += l + x;
199 *out1++ += r - x;
200 }
201
202 if(frame<sampleFrames)
203 {
204 uint32_t note = notes[event++];
205 uint32_t vel = notes[event++];
206 noteOn(note, vel);
207 }
208 }
209 for(v=0; v<activevoices; v++) if(voice[v].env < SILENCE) voice[v] = voice[--activevoices];
210 notes[0] = EVENTS_DONE; //mark events buffer as done
211 }
212
213
214 void mdaPianoVoice::update(Param par)
215 {
216 //TODO: use local copy
217 float * param = programs[curProgram].param;
218 size = (uint32_t)(12.0f * param[2] - 6.0f);
219 sizevel = 0.12f * param[3];
220 muffvel = param[5] * param[5] * 5.0f;
221
222 velsens = 1.0f + param[6] + param[6];
223 if(param[6] < 0.25f) velsens -= 0.75f - 3.0f * param[6];
224
225 fine = param[9] - 0.5f;
226 random = 0.077f * param[10] * param[10];
227 stretch = 0.000434f * (param[11] - 0.5f);
228
229 cdep = param[7] * param[7];
230 trim = 1.50f - 0.79f * cdep;
231 width = 0.04f * param[7]; if(width > 0.03f) width = 0.03f;
232
233 poly = 8 + (uint32_t)(24.9f * param[8]);
234 }