handle note on event
[software/lv2-mdametapiano.git] / src / mdaPiano.cpp
1 /* ==================================================
2 * LV2 port of the famous mda Piano VSTi
3 * ==================================================
4 *
5 * Port
6 * Author: Ricardo Wurmus (rekado)
7 * Based on: mda-vst-src-2010-02-14.zip
8 *
9 * mda Piano v1.0
10 * Copyright(c)1999-2000 Paul Kellett (maxim digital audio)
11 * Based on VST2 SDK (c)1996-1999 Steinberg Soft und Hardware GmbH, All Rights Reserved
12 *
13 * ==================================================
14 */
15
16 #include "mdaPianoCommon.h"
17 #include "mdaPiano.h"
18 #include <cstdlib> //for exit
19
20 #include <stdio.h>
21 #include <math.h>
22
23 #define STRING_BUF 2048
24 static const char* sample_file = "samples.raw";
25
26
27 mdaPiano::mdaPiano(double rate)
28 : LV2::Synth<mdaPianoVoice, mdaPiano>(p_n_ports, p_midi) {
29
30 cmax = 0x7F; //just in case...
31
32 load_samples(&waves);
33 load_kgrp(kgrp);
34
35 for(uint32_t i=0; i<NVOICES; ++i) {
36 voices[i] = new mdaPianoVoice(rate, waves, kgrp);
37 add_voices(voices[i]);
38 }
39
40 notes[0] = EVENTS_DONE;
41 sustain = activevoices = 0;
42
43 update();
44 }
45
46 //parameter change
47 void mdaPiano::update() {
48 for (uint32_t v=0; v<NVOICES; ++v) {
49 voices[v]->update(Current);
50 }
51 }
52
53
54 unsigned mdaPiano::find_free_voice(unsigned char key, unsigned char velocity) {
55 //is this a retriggered note during sustain?
56 if (sustain) {
57 for (unsigned i = 0; i < NVOICES; ++i) {
58 if ((voices[i]->get_key() == key) && (voices[i]->is_sustained()))
59 return i;
60 }
61 }
62
63 //take the next free voice if
64 // ... notes are sustained but not this new one
65 // ... notes are not sustained
66 for (unsigned i = 0; i < NVOICES; ++i) {
67 if (voices[i]->get_key() == LV2::INVALID_KEY)
68 {
69 return i;
70 }
71 }
72
73 //TODO: steal quietest note if all voices are used up
74 return 0;
75 }
76
77
78 void mdaPiano::setVolume(float value)
79 {
80 for (uint32_t v=0; v<NVOICES; ++v)
81 voices[v]->set_volume(value);
82 }
83
84
85 void mdaPiano::setParameter(unsigned char id, float value)
86 {
87 if(id>=NPARAMS)
88 return;
89 *p(id+PARAM_OFFSET) = value;
90 update();
91 #ifdef DEBUG
92 printf("changed %i to %f\n", id, value);
93 #endif
94 }
95
96
97 void mdaPiano::handle_midi(uint32_t size, unsigned char* data) {
98 #ifdef DEBUG
99 printf("%d\n", data[1]);
100 #endif
101
102 //discard invalid midi messages
103 if (size != 3)
104 return;
105
106 //receive on all channels
107 switch(data[0] & 0xf0)
108 {
109 case 0x80: //note off
110 notes[npos++] = data[1] & 0x7F; //note
111 notes[npos++] = 0; //vel
112 break;
113
114 case 0x90: //note on
115 {
116 unsigned int v = find_free_voice(data[1], data[2]);
117 if (v < NVOICES) {
118 voices[v]->on(data[1], data[2]);
119 }
120 break;
121 }
122
123 case 0xB0: //controller
124 switch(data[1])
125 {
126 case 0x01: //mod wheel
127 case 0x43: //soft pedal
128 {
129 float muff = 0.01f * (float)((127 - data[2]) * (127 - data[2]));
130 for (unsigned i = 0; i < NVOICES; ++i) {
131 voices[i]->set_muff(muff);
132 }
133 break;
134 }
135
136 case 0x07: //volume
137 setVolume(0.00002f * (float)(data[2] * data[2]));
138 break;
139
140 case 0x40: //sustain pedal
141 case 0x42: //sustenuto pedal
142 sustain = data[2] & 0x40;
143 if(sustain==0)
144 {
145 notes[npos++] = SUSTAIN; //end all sustained notes
146 notes[npos++] = 0;
147 }
148 break;
149
150 //all sound off
151 case 0x78:
152 //all notes off
153 case 0x7b:
154 default:
155 for(short v=0; v<NVOICES; v++) {
156 voices[v]->reset();
157 }
158 break;
159 }
160 break;
161
162 default: break;
163 }
164 }
165
166
167 // TODO: load this from a file
168 void mdaPiano::load_kgrp(KGRP *kgrp)
169 {
170 //Waveform data and keymapping is hard-wired in *this* version
171 kgrp[ 0].root = 36; kgrp[ 0].high = 37; kgrp[ 0].pos = 0; kgrp[ 0].end = 36275; kgrp[ 0].loop = 14774;
172 kgrp[ 1].root = 40; kgrp[ 1].high = 41; kgrp[ 1].pos = 36278; kgrp[ 1].end = 83135; kgrp[ 1].loop = 16268;
173 kgrp[ 2].root = 43; kgrp[ 2].high = 45; kgrp[ 2].pos = 83137; kgrp[ 2].end = 146756; kgrp[ 2].loop = 33541;
174 kgrp[ 3].root = 48; kgrp[ 3].high = 49; kgrp[ 3].pos = 146758; kgrp[ 3].end = 204997; kgrp[ 3].loop = 21156;
175 kgrp[ 4].root = 52; kgrp[ 4].high = 53; kgrp[ 4].pos = 204999; kgrp[ 4].end = 244908; kgrp[ 4].loop = 17191;
176 kgrp[ 5].root = 55; kgrp[ 5].high = 57; kgrp[ 5].pos = 244910; kgrp[ 5].end = 290978; kgrp[ 5].loop = 23286;
177 kgrp[ 6].root = 60; kgrp[ 6].high = 61; kgrp[ 6].pos = 290980; kgrp[ 6].end = 342948; kgrp[ 6].loop = 18002;
178 kgrp[ 7].root = 64; kgrp[ 7].high = 65; kgrp[ 7].pos = 342950; kgrp[ 7].end = 391750; kgrp[ 7].loop = 19746;
179 kgrp[ 8].root = 67; kgrp[ 8].high = 69; kgrp[ 8].pos = 391752; kgrp[ 8].end = 436915; kgrp[ 8].loop = 22253;
180 kgrp[ 9].root = 72; kgrp[ 9].high = 73; kgrp[ 9].pos = 436917; kgrp[ 9].end = 468807; kgrp[ 9].loop = 8852;
181 kgrp[10].root = 76; kgrp[10].high = 77; kgrp[10].pos = 468809; kgrp[10].end = 492772; kgrp[10].loop = 9693;
182 kgrp[11].root = 79; kgrp[11].high = 81; kgrp[11].pos = 492774; kgrp[11].end = 532293; kgrp[11].loop = 10596;
183 kgrp[12].root = 84; kgrp[12].high = 85; kgrp[12].pos = 532295; kgrp[12].end = 560192; kgrp[12].loop = 6011;
184 kgrp[13].root = 88; kgrp[13].high = 89; kgrp[13].pos = 560194; kgrp[13].end = 574121; kgrp[13].loop = 3414;
185 kgrp[14].root = 93; kgrp[14].high = 999; kgrp[14].pos = 574123; kgrp[14].end = 586343; kgrp[14].loop = 2399;
186 }
187
188
189 void mdaPiano::load_samples(short **buffer)
190 {
191 FILE *f;
192 long num, size;
193 char filepath[STRING_BUF];
194
195 strncpy(filepath, bundle_path(), STRING_BUF);
196 strncat(filepath,
197 sample_file,
198 STRING_BUF - strlen(filepath));
199 f = fopen(filepath, "rb");
200 if (f == NULL) {
201 fputs("File error", stderr);
202 exit(1);
203 }
204
205 // obtain file size
206 fseek(f, 0, SEEK_END);
207 size = ftell(f);
208 rewind(f);
209
210 // allocate memory to contain the whole file
211 *buffer = (short*) malloc (sizeof(short)*size);
212 if (*buffer == NULL) {
213 fputs("Memory error", stderr);
214 exit(2);
215 }
216
217 // copy the file into the buffer
218 num = fread(*buffer, 1, size, f);
219 if (num != size) {
220 fputs ("Reading error", stderr);
221 exit (3);
222 }
223 fclose (f);
224 return;
225 }