rewrite `processEvents` as `handle_midi`
[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
19 #include <stdio.h>
20 #include <math.h>
21
22 #define STRING_BUF 2048
23 static const char* sample_file = "samples.raw";
24
25
26 mdaPiano::mdaPiano(double rate)
27 : LV2::Synth<mdaPianoVoice, mdaPiano>(p_n_ports, p_midi) {
28
29 cmax = 0x7F; //just in case...
30
31 load_samples(&waves);
32 load_kgrp(kgrp);
33
34 for(uint32_t i=0; i<NVOICES; ++i) {
35 voices[i] = new mdaPianoVoice(rate, waves, kgrp);
36 add_voices(voices[i]);
37 }
38
39 notes[0] = EVENTS_DONE;
40 cpos = sustain = activevoices = 0;
41 comb = new float[256];
42
43 update();
44 }
45
46
47 void mdaPiano::update() //parameter change
48 {
49 float * param = programs[curProgram].param;
50 size = (uint32_t)(12.0f * param[2] - 6.0f);
51 sizevel = 0.12f * param[3];
52 muffvel = param[5] * param[5] * 5.0f;
53
54 velsens = 1.0f + param[6] + param[6];
55 if(param[6] < 0.25f) velsens -= 0.75f - 3.0f * param[6];
56
57 fine = param[9] - 0.5f;
58 random = 0.077f * param[10] * param[10];
59 stretch = 0.000434f * (param[11] - 0.5f);
60
61 cdep = param[7] * param[7];
62 trim = 1.50f - 0.79f * cdep;
63 width = 0.04f * param[7]; if(width > 0.03f) width = 0.03f;
64
65 poly = 8 + (uint32_t)(24.9f * param[8]);
66 }
67
68
69 void mdaPiano::setParameter(uint32_t index, float value)
70 {
71 programs[curProgram].param[index] = value;
72 update();
73 }
74
75
76 void mdaPiano::handle_midi(uint32_t size, unsigned char* data) {
77 #ifdef DEBUG
78 printf("%d\n", data[1]);
79 #endif
80
81 //discard invalid midi messages
82 if (size != 3)
83 return;
84
85 //receive on all channels
86 switch(data[0] & 0xf0)
87 {
88 case 0x80: //note off
89 notes[npos++] = data[1] & 0x7F; //note
90 notes[npos++] = 0; //vel
91 break;
92
93 case 0x90: //note on
94 notes[npos++] = data[1] & 0x7F; //note
95 notes[npos++] = data[2] & 0x7F; //vel
96 break;
97
98 case 0xB0: //controller
99 switch(data[1])
100 {
101 case 0x01: //mod wheel
102 case 0x43: //soft pedal
103 muff = 0.01f * (float)((127 - data[2]) * (127 - data[2]));
104 break;
105
106 case 0x07: //volume
107 volume = 0.00002f * (float)(data[2] * data[2]);
108 break;
109
110 case 0x40: //sustain pedal
111 case 0x42: //sustenuto pedal
112 sustain = data[2] & 0x40;
113 if(sustain==0)
114 {
115 notes[npos++] = SUSTAIN; //end all sustained notes
116 notes[npos++] = 0;
117 }
118 break;
119
120 //all sound off
121 case 0x78:
122 //all notes off
123 case 0x7b:
124 default:
125 for(short v=0; v<NVOICES; v++) {
126 voices[v]->reset();
127 }
128 break;
129 }
130 break;
131
132 default: break;
133 }
134 }
135
136
137 // TODO: load this from a file
138 void mdaPiano::load_kgrp(KGRP *kgrp)
139 {
140 //Waveform data and keymapping is hard-wired in *this* version
141 kgrp[ 0].root = 36; kgrp[ 0].high = 37; kgrp[ 0].pos = 0; kgrp[ 0].end = 36275; kgrp[ 0].loop = 14774;
142 kgrp[ 1].root = 40; kgrp[ 1].high = 41; kgrp[ 1].pos = 36278; kgrp[ 1].end = 83135; kgrp[ 1].loop = 16268;
143 kgrp[ 2].root = 43; kgrp[ 2].high = 45; kgrp[ 2].pos = 83137; kgrp[ 2].end = 146756; kgrp[ 2].loop = 33541;
144 kgrp[ 3].root = 48; kgrp[ 3].high = 49; kgrp[ 3].pos = 146758; kgrp[ 3].end = 204997; kgrp[ 3].loop = 21156;
145 kgrp[ 4].root = 52; kgrp[ 4].high = 53; kgrp[ 4].pos = 204999; kgrp[ 4].end = 244908; kgrp[ 4].loop = 17191;
146 kgrp[ 5].root = 55; kgrp[ 5].high = 57; kgrp[ 5].pos = 244910; kgrp[ 5].end = 290978; kgrp[ 5].loop = 23286;
147 kgrp[ 6].root = 60; kgrp[ 6].high = 61; kgrp[ 6].pos = 290980; kgrp[ 6].end = 342948; kgrp[ 6].loop = 18002;
148 kgrp[ 7].root = 64; kgrp[ 7].high = 65; kgrp[ 7].pos = 342950; kgrp[ 7].end = 391750; kgrp[ 7].loop = 19746;
149 kgrp[ 8].root = 67; kgrp[ 8].high = 69; kgrp[ 8].pos = 391752; kgrp[ 8].end = 436915; kgrp[ 8].loop = 22253;
150 kgrp[ 9].root = 72; kgrp[ 9].high = 73; kgrp[ 9].pos = 436917; kgrp[ 9].end = 468807; kgrp[ 9].loop = 8852;
151 kgrp[10].root = 76; kgrp[10].high = 77; kgrp[10].pos = 468809; kgrp[10].end = 492772; kgrp[10].loop = 9693;
152 kgrp[11].root = 79; kgrp[11].high = 81; kgrp[11].pos = 492774; kgrp[11].end = 532293; kgrp[11].loop = 10596;
153 kgrp[12].root = 84; kgrp[12].high = 85; kgrp[12].pos = 532295; kgrp[12].end = 560192; kgrp[12].loop = 6011;
154 kgrp[13].root = 88; kgrp[13].high = 89; kgrp[13].pos = 560194; kgrp[13].end = 574121; kgrp[13].loop = 3414;
155 kgrp[14].root = 93; kgrp[14].high = 999; kgrp[14].pos = 574123; kgrp[14].end = 586343; kgrp[14].loop = 2399;
156 }
157
158
159 void mdaPiano::load_samples(short **buffer)
160 {
161 FILE *f;
162 long num, size;
163 char filepath[STRING_BUF];
164
165 strncpy(filepath, bundle_path(), STRING_BUF);
166 strncat(filepath,
167 sample_file,
168 STRING_BUF - strlen(filepath));
169 f = fopen(filepath, "rb");
170 if (f == NULL) {
171 fputs("File error", stderr);
172 exit(1);
173 }
174
175 // obtain file size
176 fseek(f, 0, SEEK_END);
177 size = ftell(f);
178 rewind(f);
179
180 // allocate memory to contain the whole file
181 *buffer = (short*) malloc (sizeof(short)*size);
182 if (*buffer == NULL) {
183 fputs("Memory error", stderr);
184 exit(2);
185 }
186
187 // copy the file into the buffer
188 num = fread(*buffer, 1, size, f);
189 if (num != size) {
190 fputs ("Reading error", stderr);
191 exit (3);
192 }
193 fclose (f);
194 return;
195 }