update parameters on note on
[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 update(Default);
26 }
27
28
29 void mdaPianoVoice::reset() {
30 env = 0.0f;
31 dec = 0.99f;
32 muff = 160.0f;
33 volume = 0.2f;
34 sustain = 0;
35 cpos = 0;
36 m_key = LV2::INVALID_KEY;
37 }
38
39
40 float mdaPianoVoice::p_helper(unsigned short id, Param d) {
41 if (d == Default)
42 return default_preset[p_offset(id)];
43 else
44 return *p(id);
45 }
46
47
48 void mdaPianoVoice::on(unsigned char note, unsigned char velocity)
49 {
50 // store key that turned this voice on (used in 'get_key')
51 m_key = note;
52 update(Current);
53
54 float l=99.0f;
55 uint32_t k, s;
56
57 if(velocity>0)
58 {
59 // TODO: move this to mdaPiano.cpp
60 /*
61 if(activevoices < poly) //add a note
62 {
63 vl = activevoices;
64 activevoices++;
65 }
66 else //steal a note
67 {
68 for(v=0; v<poly; v++) //find quietest voice
69 {
70 if(voice[v].env < l) { l = voice[v].env; vl = v; }
71 }
72 }
73 */
74
75 k = (note - 60) * (note - 60);
76 l = fine + random * ((float)(k % 13) - 6.5f); //random & fine tune
77 if(note > 60) l += stretch * (float)k; //stretch
78
79 s = size;
80 if(velocity > 40) s += (uint32_t)(sizevel * (float)(velocity - 40));
81
82 k = 0;
83 while(note > (kgrp[k].high + s)) k++; //find keygroup
84
85 l += (float)(note - kgrp[k].root); //pitch
86 l = 22050.0f * iFs * (float)exp(0.05776226505 * l);
87 delta = (uint32_t)(65536.0f * l);
88 frac = 0;
89 pos = kgrp[k].pos;
90 end = kgrp[k].end;
91 loop = kgrp[k].loop;
92
93 env = (0.5f + velsens) * (float)pow(0.0078f * velocity, velsens); //velocity
94
95 l = 50.0f + *p(p_muffling_filter) * *p(p_muffling_filter) * muff + muffvel * (float)(velocity - 64); //muffle
96 if(l < (55.0f + 0.25f * (float)note)) l = 55.0f + 0.25f * (float)note;
97 if(l > 210.0f) l = 210.0f;
98 ff = l * l * iFs;
99 f0 = f1 = 0.0f;
100
101 if(note < 12) note = 12;
102 if(note > 108) note = 108;
103 l = volume * trim;
104 outr = l + l * width * (float)(note - 60);
105 outl = l + l - outr;
106
107 if(note < 44) note = 44; //limit max decay length
108 l = 2.0f * *p(p_envelope_decay);
109 if(l < 1.0f) l += 0.25f - 0.5f * *p(p_envelope_decay);
110 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 release(0);
118 //}
119 }
120 }
121
122
123 void mdaPianoVoice::release(unsigned char velocity)
124 {
125 if(sustain==0) {
126 //no release on highest notes
127 if(m_key < 94 || m_key == SUSTAIN) {
128 dec = (float)exp(-iFs * exp(2.0 + 0.017 * (double)m_key - 2.0 * *p(p_envelope_release)));
129 }
130 } else {
131 m_key = SUSTAIN;
132 }
133
134 //Mark the voice to be turned off later. It may not be set to
135 //INVALID_KEY yet, because the release sound still needs to be
136 //rendered. m_key is finally set to INVALID_KEY by 'render' when
137 //env < SILENCE
138 m_key = SUSTAIN;
139 }
140
141
142 void mdaPianoVoice::render(uint32_t from, uint32_t to)
143 {
144 // abort if no key is pressed
145 // initially m_key is INVALID_KEY, so no sound will be rendered
146 if (m_key == LV2::INVALID_KEY)
147 return;
148
149 float x, l, r;
150 uint32_t i;
151
152 for (uint32_t frame = from; frame < to; ++frame) {
153 l = r = 0.0f;
154
155 frac += delta; //integer-based linear interpolation
156 pos += frac >> 16;
157 frac &= 0xFFFF;
158 if(pos > end) pos -= loop;
159
160 i = waves[pos];
161 i = (i << 7) + (frac >> 9) * (waves[pos + 1] - i) + 0x40400000;
162 x = env * (*(float *)&i - 3.0f); //fast int->float
163
164 /////////////////////
165 //TODO: This was used in processReplacing instead of the above
166 /*
167 //i = (i << 7) + (frac >> 9) * (waves[pos + 1] - i) + 0x40400000; //not working on intel mac !?!
168 i = waves[pos] + ((frac * (waves[pos + 1] - waves[pos])) >> 16);
169 x = env * (float)i / 32768.0f;
170 //x = env * (*(float *)&i - 3.0f); //fast int->float
171 */
172 /////////////////////
173
174 env = env * dec; //envelope
175 f0 += ff * (x + f1 - f0); //muffle filter
176 f1 = x;
177
178 l += outl * f0;
179 r += outr * f0;
180
181 //TODO: this was used in processReplacing
182 /////////////////////
183 /*
184 if(!(l > -2.0f) || !(l < 2.0f))
185 {
186 printf("what is this shit? %d, %f, %f\n", i, x, f0);
187 l = 0.0f;
188 }
189 if(!(r > -2.0f) || !(r < 2.0f))
190 {
191 r = 0.0f;
192 }
193 */
194 /////////////////////
195 comb[cpos] = l + r;
196 ++cpos &= 0x7F;
197 x = cdep * comb[cpos]; //stereo simulator
198
199 // TODO: processReplacing simply assigned instead of adding
200 // write to output
201 p(p_left)[frame] += l + x;
202 p(p_right)[frame] += r - x;
203 }
204
205 // turn off further processing when the envelope has rendered the voice silent
206 if (env < SILENCE) {
207 m_key = LV2::INVALID_KEY;
208 }
209 }
210
211
212 void mdaPianoVoice::update(Param par)
213 {
214 size = (uint32_t)(12.0f * p_helper(p_hardness_offset, par) - 6.0f);
215 sizevel = 0.12f * p_helper(p_velocity_to_hardness, par);
216 muffvel = p_helper(p_velocity_to_muffling, par) * p_helper(p_velocity_to_muffling, par) * 5.0f;
217
218 velsens = 1.0f + p_helper(p_velocity_sensitivity, par) + p_helper(p_velocity_sensitivity, par);
219 if(p_helper(p_velocity_sensitivity, par) < 0.25f) velsens -= 0.75f - 3.0f * p_helper(p_velocity_sensitivity, par);
220
221 fine = p_helper(p_fine_tuning, par) - 0.5f;
222 random = 0.077f * p_helper(p_random_detuning, par) * p_helper(p_random_detuning, par);
223 stretch = 0.000434f * (p_helper(p_stretch_tuning, par) - 0.5f);
224
225 cdep = p_helper(p_stereo_width, par) * p_helper(p_stereo_width, par);
226 trim = 1.50f - 0.79f * cdep;
227 width = 0.04f * p_helper(p_stereo_width, par); if(width > 0.03f) width = 0.03f;
228
229 poly = 8 + (uint32_t)(24.9f * p_helper(p_polyphony, par));
230 }