1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/* ==================================================
* LV2 port of the famous mda Piano VSTi
* ==================================================
*
* Port
* Author: Ricardo Wurmus (rekado)
* Based on: mda-vst-src-2010-02-14.zip
*
* mda Piano v1.0
* Copyright(c)1999-2000 Paul Kellett (maxim digital audio)
* Based on VST2 SDK (c)1996-1999 Steinberg Soft und Hardware GmbH, All Rights Reserved
*
* ==================================================
*/
#include "mdaPianoCommon.h"
#include "mdaPiano.h"
#include <cstdlib> //for exit
#include <stdio.h>
#include <math.h>
#define STRING_BUF 2048
static const char* sample_file = "samples.raw";
mdaPiano::mdaPiano(double rate)
: LV2::Synth<mdaPianoVoice, mdaPiano>(p_n_ports, p_midi) {
cmax = 0x7F; //just in case...
load_samples(&waves);
load_kgrp(kgrp);
for(uint32_t i=0; i<NVOICES; ++i) {
voices[i] = new mdaPianoVoice(rate, waves, kgrp);
add_voices(voices[i]);
}
notes[0] = EVENTS_DONE;
cpos = sustain = activevoices = 0;
comb = new float[256];
update();
}
//parameter change
void mdaPiano::update() {
for (uint32_t v=0; v<NVOICES; ++v) {
voices[v]->update(Current);
}
}
void mdaPiano::setParameter(uint32_t index, float value)
{
programs[curProgram].param[index] = value;
update();
}
void mdaPiano::handle_midi(uint32_t size, unsigned char* data) {
#ifdef DEBUG
printf("%d\n", data[1]);
#endif
//discard invalid midi messages
if (size != 3)
return;
//receive on all channels
switch(data[0] & 0xf0)
{
case 0x80: //note off
notes[npos++] = data[1] & 0x7F; //note
notes[npos++] = 0; //vel
break;
case 0x90: //note on
notes[npos++] = data[1] & 0x7F; //note
notes[npos++] = data[2] & 0x7F; //vel
break;
case 0xB0: //controller
switch(data[1])
{
case 0x01: //mod wheel
case 0x43: //soft pedal
muff = 0.01f * (float)((127 - data[2]) * (127 - data[2]));
break;
case 0x07: //volume
volume = 0.00002f * (float)(data[2] * data[2]);
break;
case 0x40: //sustain pedal
case 0x42: //sustenuto pedal
sustain = data[2] & 0x40;
if(sustain==0)
{
notes[npos++] = SUSTAIN; //end all sustained notes
notes[npos++] = 0;
}
break;
//all sound off
case 0x78:
//all notes off
case 0x7b:
default:
for(short v=0; v<NVOICES; v++) {
voices[v]->reset();
}
break;
}
break;
default: break;
}
}
// TODO: load this from a file
void mdaPiano::load_kgrp(KGRP *kgrp)
{
//Waveform data and keymapping is hard-wired in *this* version
kgrp[ 0].root = 36; kgrp[ 0].high = 37; kgrp[ 0].pos = 0; kgrp[ 0].end = 36275; kgrp[ 0].loop = 14774;
kgrp[ 1].root = 40; kgrp[ 1].high = 41; kgrp[ 1].pos = 36278; kgrp[ 1].end = 83135; kgrp[ 1].loop = 16268;
kgrp[ 2].root = 43; kgrp[ 2].high = 45; kgrp[ 2].pos = 83137; kgrp[ 2].end = 146756; kgrp[ 2].loop = 33541;
kgrp[ 3].root = 48; kgrp[ 3].high = 49; kgrp[ 3].pos = 146758; kgrp[ 3].end = 204997; kgrp[ 3].loop = 21156;
kgrp[ 4].root = 52; kgrp[ 4].high = 53; kgrp[ 4].pos = 204999; kgrp[ 4].end = 244908; kgrp[ 4].loop = 17191;
kgrp[ 5].root = 55; kgrp[ 5].high = 57; kgrp[ 5].pos = 244910; kgrp[ 5].end = 290978; kgrp[ 5].loop = 23286;
kgrp[ 6].root = 60; kgrp[ 6].high = 61; kgrp[ 6].pos = 290980; kgrp[ 6].end = 342948; kgrp[ 6].loop = 18002;
kgrp[ 7].root = 64; kgrp[ 7].high = 65; kgrp[ 7].pos = 342950; kgrp[ 7].end = 391750; kgrp[ 7].loop = 19746;
kgrp[ 8].root = 67; kgrp[ 8].high = 69; kgrp[ 8].pos = 391752; kgrp[ 8].end = 436915; kgrp[ 8].loop = 22253;
kgrp[ 9].root = 72; kgrp[ 9].high = 73; kgrp[ 9].pos = 436917; kgrp[ 9].end = 468807; kgrp[ 9].loop = 8852;
kgrp[10].root = 76; kgrp[10].high = 77; kgrp[10].pos = 468809; kgrp[10].end = 492772; kgrp[10].loop = 9693;
kgrp[11].root = 79; kgrp[11].high = 81; kgrp[11].pos = 492774; kgrp[11].end = 532293; kgrp[11].loop = 10596;
kgrp[12].root = 84; kgrp[12].high = 85; kgrp[12].pos = 532295; kgrp[12].end = 560192; kgrp[12].loop = 6011;
kgrp[13].root = 88; kgrp[13].high = 89; kgrp[13].pos = 560194; kgrp[13].end = 574121; kgrp[13].loop = 3414;
kgrp[14].root = 93; kgrp[14].high = 999; kgrp[14].pos = 574123; kgrp[14].end = 586343; kgrp[14].loop = 2399;
}
void mdaPiano::load_samples(short **buffer)
{
FILE *f;
long num, size;
char filepath[STRING_BUF];
strncpy(filepath, bundle_path(), STRING_BUF);
strncat(filepath,
sample_file,
STRING_BUF - strlen(filepath));
f = fopen(filepath, "rb");
if (f == NULL) {
fputs("File error", stderr);
exit(1);
}
// obtain file size
fseek(f, 0, SEEK_END);
size = ftell(f);
rewind(f);
// allocate memory to contain the whole file
*buffer = (short*) malloc (sizeof(short)*size);
if (*buffer == NULL) {
fputs("Memory error", stderr);
exit(2);
}
// copy the file into the buffer
num = fread(*buffer, 1, size, f);
if (num != size) {
fputs ("Reading error", stderr);
exit (3);
}
fclose (f);
return;
}
|
