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
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
|
//=========================================================
// MusE
// Linux Music Editor
// $Id: s1.cpp,v 1.9.2.5 2009/11/19 04:20:33 terminator356 Exp $
//
// S1 - simple mono demo synthesizer
// - plays only one note at a time
// - has no gui nor any controller
//
// Version 0.2: stop note on wave zero crossing to avoid
// clicks
//
// (C) Copyright 2001-2004 Werner Schweer (ws@seh.de)
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; version 2 of
// the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
//=========================================================
#include <cmath>
#include <list>
#include <QMessageBox>
#include "libsynti/mono.h"
#define RESOLUTION 16384
// Make sure this number is unique among all the MESS synths.
#define S1_UNIQUE_ID 6
//---------------------------------------------------------
// S1 - simple mono demo synthesizer
//---------------------------------------------------------
class S1 : public MessMono {
static int useCount;
static float *wave_table;
int gate;
float freq;
unsigned accu;
float sample;
bool _showGui;
int param;
virtual void note(int channel, int pitch, int velo);
//virtual void processMessages();
virtual void process(unsigned pos, float** buffer, int offset, int n);
//virtual bool hasGui() const { return true; }
//virtual bool guiVisible() const { return _showGui; }
//virtual void showGui(bool);
virtual bool hasNativeGui() const { return true; }
virtual bool nativeGuiVisible() const { return _showGui; }
virtual void showNativeGui(bool);
virtual bool setController(int channel, int ctrl, int val);
virtual int getControllerInfo(int id, const char** name, int* ctrl, int* min, int* max, int* initval) const;
public:
S1();
virtual ~S1();
};
float* S1::wave_table;
int S1::useCount = 0;
//---------------------------------------------------------
// S1
//---------------------------------------------------------
S1::S1() : MessMono()
{
if (useCount++ == 0) {
//
// create sinus wave table
//
wave_table = new float[RESOLUTION];
for (int i = 0; i < RESOLUTION; i++)
wave_table[i] = sin ((i * 2.0 * M_PI) / RESOLUTION) / 6.0;
}
gate = 0;
param = 0;
_showGui=false;
showNativeGui(true);
}
//---------------------------------------------------------
// ~S1
//---------------------------------------------------------
S1::~S1()
{
if (--useCount == 0)
delete[] wave_table;
}
//---------------------------------------------------------
// noteon
// process note on
//---------------------------------------------------------
void S1::note(int /*channel*/, int pitch, int velo)
{
if (velo == 0) {
//
// note off
//
if (sample == 0.0)
gate = 0;
else if (sample > 0.0)
gate = 2;
else if (sample < 0.0)
gate = 3;
}
else {
//
// note on
//
accu = 0;
gate = 1;
freq = 8.176 * exp(float(pitch)*log(2.0)/12.0);
}
}
//---------------------------------------------------------
// write
// synthesize n samples into buffer+offset
//---------------------------------------------------------
void S1::process(unsigned /*pos*/, float** buffer, int offset, int n)
{
if (gate == 0)
return;
float* p = buffer[0] + offset;
float sample1, sample2;
unsigned freq_256 = (int) (freq * ((double) RESOLUTION) / sampleRate() * 256.0);
for (int i = 0; i < n; i++) {
accu += freq_256;
while (accu >= RESOLUTION * 256)
accu -= RESOLUTION * 256;
sample1 = wave_table[accu >> 8]; // sinus component
if (sample1< 0.0f) // square wave component
sample2 = -0.4;
else
sample2 = 0.4;
sample = ((1.0-float(param)/127.0)*sample1 + (float(param)/127.0)*sample2) / 2.0;
//
// stop on zero crossing
// if in decay state
//
if (gate == 2 && sample <= 0.0) {
gate = 0;
break;
}
else if (gate == 3 && sample >= 0.0) {
gate = 0;
break;
}
p[i] += sample;
}
}
//---------------------------------------------------------
// inst
//---------------------------------------------------------
void S1::showNativeGui(bool show)
{
if (show)
QMessageBox::information( NULL, "S1",
"S1 is a demo synth mainly for\n"
"developers wishing to learn\n"
"how to make a M.E.S.S synth.\n"
"\n"
"One modulation parameter is available,\n"
"it sweeps the signal between square and\n"
"sinus wave.\n", 1 );
}
bool S1::setController(int, int ctrl, int val)
{
if (ctrl == 1) {
param = val;
}
return true;
}
int S1::getControllerInfo(int id, const char** name, int* ctrl, int* min, int* max, int* initval) const
{
if (id == 0) {
*name = "Modulation";
*ctrl = 1;
*min = 0;
*max = 127;
*initval = 0;
return 1;
}
else
return 0;
}
//---------------------------------------------------------
// inst
//---------------------------------------------------------
class QWidget;
static Mess* instantiate(int sr, QWidget*, QString* /* projectPathPtr */, const char*)
{
S1* s1 = new S1();
s1->setSampleRate(sr);
return s1;
}
extern "C" {
static MESS descriptor = {
"S1",
"S1 MusE Demo Software Synthesizer",
"0.2", // version string
MESS_MAJOR_VERSION, MESS_MINOR_VERSION,
instantiate
};
// We must compile with -fvisibility=hidden to avoid namespace
// conflicts with global variables.
// Only visible symbol is "mess_descriptor".
// (TODO: all plugins should be compiled this way)
__attribute__ ((visibility("default")))
const MESS* mess_descriptor() { return &descriptor; }
}
|
