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