remove unneeded headers
[software/lv2-mdametapiano.git] / src / mdaPianoVoice.cpp
1 #include "mdaPianoVoice.h"
2
3 mdaPianoVoice::mdaPianoVoice(double rate, Sample * master_samples, KGRP * master_kgrp) {
4 //set tuning
5 Fs = rate;
6 iFs = 1.0f/Fs;
7
8 samples = master_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 k = (note - 60) * (note - 60);
60 l = fine + random * ((float)(k % 13) - 6.5f); //random & fine tune
61 if(note > 60) l += stretch * (float)k; //stretch
62
63 s = size;
64 if(velocity > 40) s += (uint32_t)(sizevel * (float)(velocity - 40));
65
66 k = 0;
67 while(note > (kgrp[k].high + s)) k++; //find keygroup
68 sample_index = k; //store sample index
69
70 l += (float)(note - kgrp[k].root); //pitch
71 l = 22050.0f * iFs * (float)exp(0.05776226505 * l);
72 delta = (uint32_t)(65536.0f * l);
73 frac = 0;
74 pos = 0;
75 end = samples[sample_index].size;
76 loop = kgrp[sample_index].loop;
77
78 env = (0.5f + velsens) * (float)pow(0.0078f * velocity, velsens); //velocity
79
80 l = 50.0f + *p(p_muffling_filter) * *p(p_muffling_filter) * muff + muffvel * (float)(velocity - 64); //muffle
81 if(l < (55.0f + 0.25f * (float)note)) l = 55.0f + 0.25f * (float)note;
82 if(l > 210.0f) l = 210.0f;
83 ff = l * l * iFs;
84 f0 = f1 = 0.0f;
85
86 if(note < 12) note = 12;
87 if(note > 108) note = 108;
88 l = volume * trim;
89 outr = l + l * width * (float)(note - 60);
90 outl = l + l - outr;
91
92 if(note < 44) note = 44; //limit max decay length
93 l = 2.0f * *p(p_envelope_decay);
94 if(l < 1.0f) l += 0.25f - 0.5f * *p(p_envelope_decay);
95 dec = (float)exp(-iFs * exp(-0.6 + 0.033 * (double)note - l));
96 }
97 else //note off
98 {
99 release(0);
100 }
101 }
102
103
104 void mdaPianoVoice::release(unsigned char velocity)
105 {
106 if(sustain==0) {
107 //no release on highest notes
108 if(m_key < 94 || m_key == SUSTAIN) {
109 dec = (float)exp(-iFs * exp(2.0 + 0.017 * (double)m_key - 2.0 * *p(p_envelope_release)));
110 }
111 } else {
112 m_key = SUSTAIN;
113 }
114
115 //Mark the voice to be turned off later. It may not be set to
116 //INVALID_KEY yet, because the release sound still needs to be
117 //rendered. m_key is finally set to INVALID_KEY by 'render' when
118 //env < SILENCE
119 m_key = SUSTAIN;
120 }
121
122
123 void mdaPianoVoice::render(uint32_t from, uint32_t to)
124 {
125 // abort if no key is pressed
126 // initially m_key is INVALID_KEY, so no sound will be rendered
127 if (m_key == LV2::INVALID_KEY)
128 return;
129
130 float x, l, r;
131 uint32_t i;
132
133 for (uint32_t frame = from; frame < to; ++frame) {
134 l = r = 0.0f;
135
136 frac += delta; //integer-based linear interpolation
137 pos += frac >> 16;
138 frac &= 0xFFFF;
139 if(pos > end) pos -= loop;
140
141 i = samples[sample_index].buffer[pos];
142 i = (i << 7) + (frac >> 9) * (samples[sample_index].buffer[pos + 1] - i) + 0x40400000;
143 x = env * (*(float *)&i - 3.0f); //fast int->float
144
145 env = env * dec; //envelope
146 f0 += ff * (x + f1 - f0); //muffle filter
147 f1 = x;
148
149 l += outl * f0;
150 r += outr * f0;
151
152 comb[cpos] = l + r;
153 ++cpos &= 0x7F;
154 x = cdep * comb[cpos]; //stereo simulator
155
156 // write to output
157 p(p_left)[frame] += l + x;
158 p(p_right)[frame] += r - x;
159 }
160
161 // turn off further processing when the envelope has rendered the voice silent
162 if (env < SILENCE) {
163 m_key = LV2::INVALID_KEY;
164 }
165 }
166
167
168 void mdaPianoVoice::update(Param par)
169 {
170 size = (uint32_t)(12.0f * p_helper(p_hardness_offset, par) - 6.0f);
171 sizevel = 0.12f * p_helper(p_velocity_to_hardness, par);
172 muffvel = p_helper(p_velocity_to_muffling, par) * p_helper(p_velocity_to_muffling, par) * 5.0f;
173
174 velsens = 1.0f + p_helper(p_velocity_sensitivity, par) + p_helper(p_velocity_sensitivity, par);
175 if(p_helper(p_velocity_sensitivity, par) < 0.25f) velsens -= 0.75f - 3.0f * p_helper(p_velocity_sensitivity, par);
176
177 fine = p_helper(p_fine_tuning, par) - 0.5f;
178 random = 0.077f * p_helper(p_random_detuning, par) * p_helper(p_random_detuning, par);
179 stretch = 0.000434f * (p_helper(p_stretch_tuning, par) - 0.5f);
180
181 cdep = p_helper(p_stereo_width, par) * p_helper(p_stereo_width, par);
182 trim = 1.50f - 0.79f * cdep;
183 width = 0.04f * p_helper(p_stereo_width, par); if(width > 0.03f) width = 0.03f;
184
185 poly = 8 + (uint32_t)(24.9f * p_helper(p_polyphony, par));
186 }