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
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
|
/* FluidSynth - A Software Synthesizer
*
* Copyright (C) 2003 Peter Hanappe and others.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public License
* as published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307, USA
*/
#include "fluid.h"
#include "conv.h"
#include "voice.h"
namespace FluidS {
#undef FLUID_LOG
#define FLUID_LOG(a, ...)
//---------------------------------------------------------
// clone
//---------------------------------------------------------
void Mod::clone(Mod* mod) const
{
mod->dest = dest;
mod->src1 = src1;
mod->flags1 = flags1;
mod->src2 = src2;
mod->flags2 = flags2;
mod->amount = amount;
}
/*
* fluid_mod_set_source1
*/
void Mod::set_source1(int src, int flags)
{
src1 = src;
flags1 = flags;
}
/*
* fluid_mod_set_source2
*/
void Mod::set_source2(int src, int flags)
{
src2 = src;
flags2 = flags;
}
/*
* fluid_mod_get_value
*/
float Mod::get_value(Channel* chan, Voice* voice)
{
Mod* mod = this;
float v1 = 0.0, v2 = 1.0;
float range1 = 127.0, range2 = 127.0;
if (chan == 0)
return 0.0f;
/* 'special treatment' for default controller
*
* Reference: SF2.01 section 8.4.2
*
* The GM default controller 'vel-to-filter cut off' is not clearly
* defined: If implemented according to the specs, the filter
* frequency jumps between vel=63 and vel=64. To maintain
* compatibility with existing sound fonts, the implementation is
* 'hardcoded', it is impossible to implement using only one
* modulator otherwise.
*
* I assume here, that the 'intention' of the paragraph is one
* octave (1200 cents) filter frequency shift between vel=127 and
* vel=64. 'amount' is (-2400), at least as long as the controller
* is set to default.
*
* Further, the 'appearance' of the modulator (source enumerator,
* destination enumerator, flags etc) is different from that
* described in section 8.4.2, but it matches the definition used in
* several SF2.1 sound fonts (where it is used only to turn it off).
*/
#if 0
if ((mod->src2 == FLUID_MOD_VELOCITY) &&
(mod->src1 == FLUID_MOD_VELOCITY) &&
(mod->flags1 == (FLUID_MOD_GC | FLUID_MOD_UNIPOLAR
| FLUID_MOD_NEGATIVE | FLUID_MOD_LINEAR)) &&
(mod->flags2 == (FLUID_MOD_GC | FLUID_MOD_UNIPOLAR
| FLUID_MOD_POSITIVE | FLUID_MOD_SWITCH)) &&
(mod->dest == GEN_FILTERFC)) {
if (voice->vel < 64)
return (float) mod->amount / 2.0;
else
return (float) mod->amount * (127 - voice->vel) / 127;
}
#endif
/* get the initial value of the first source */
if (mod->src1 > 0) {
if (mod->flags1 & FLUID_MOD_CC) {
v1 = chan->getCC(mod->src1);
}
else { /* source 1 is one of the direct controllers */
switch (mod->src1) {
case FLUID_MOD_NONE: /* SF 2.01 8.2.1 item 0: src enum=0 => value is 1 */
v1 = range1;
break;
case FLUID_MOD_VELOCITY:
v1 = voice->vel;
break;
case FLUID_MOD_KEY:
v1 = voice->key;
break;
case FLUID_MOD_KEYPRESSURE:
v1 = chan->key_pressure;
break;
case FLUID_MOD_CHANNELPRESSURE:
v1 = chan->channel_pressure;
break;
case FLUID_MOD_PITCHWHEEL:
v1 = chan->pitch_bend;
range1 = 0x4000;
break;
case FLUID_MOD_PITCHWHEELSENS:
v1 = chan->pitch_wheel_sensitivity;
break;
default:
v1 = 0.0;
}
}
/* transform the input value */
switch (mod->flags1 & 0x0f) {
case 0: /* linear, unipolar, positive */
v1 /= range1;
break;
case 1: /* linear, unipolar, negative */
v1 = 1.0f - v1 / range1;
break;
case 2: /* linear, bipolar, positive */
v1 = -1.0f + 2.0f * v1 / range1;
break;
case 3: /* linear, bipolar, negative */
v1 = 1.0f - 2.0f * v1 / range1;
break;
case 4: /* concave, unipolar, positive */
v1 = fluid_concave(v1);
break;
case 5: /* concave, unipolar, negative */
v1 = fluid_concave(127 - v1);
break;
case 6: /* concave, bipolar, positive */
v1 = (v1 > 64)? fluid_concave(2 * (v1 - 64)) : -fluid_concave(2 * (64 - v1));
break;
case 7: /* concave, bipolar, negative */
v1 = (v1 > 64)? -fluid_concave(2 * (v1 - 64)) : fluid_concave(2 * (64 - v1));
break;
case 8: /* convex, unipolar, positive */
v1 = fluid_convex(v1);
break;
case 9: /* convex, unipolar, negative */
v1 = fluid_convex(127 - v1);
break;
case 10: /* convex, bipolar, positive */
v1 = (v1 > 64) ? fluid_convex(2 * (v1 - 64)) : -fluid_convex(2 * (64 - v1));
break;
case 11: /* convex, bipolar, negative */
v1 = (v1 > 64)? -fluid_convex(2 * (v1 - 64)) : fluid_convex(2 * (64 - v1));
break;
case 12: /* switch, unipolar, positive */
v1 = (v1 >= 64)? 1.0f : 0.0f;
break;
case 13: /* switch, unipolar, negative */
v1 = (v1 >= 64)? 0.0f : 1.0f;
break;
case 14: /* switch, bipolar, positive */
v1 = (v1 >= 64)? 1.0f : -1.0f;
break;
case 15: /* switch, bipolar, negative */
v1 = (v1 >= 64)? -1.0f : 1.0f;
break;
}
}
else
return 0.0;
/* no need to go further */
if (v1 == 0.0f)
return 0.0f;
/* get the second input source */
if (mod->src2 > 0) {
if (mod->flags2 & FLUID_MOD_CC) {
v2 = chan->getCC(mod->src2);
}
else {
switch (mod->src2) {
case FLUID_MOD_NONE: /* SF 2.01 8.2.1 item 0: src enum=0 => value is 1 */
v2 = range2;
break;
case FLUID_MOD_VELOCITY:
v2 = voice->vel;
break;
case FLUID_MOD_KEY:
v2 = voice->key;
break;
case FLUID_MOD_KEYPRESSURE:
v2 = chan->key_pressure;
break;
case FLUID_MOD_CHANNELPRESSURE:
v2 = chan->channel_pressure;
break;
case FLUID_MOD_PITCHWHEEL:
v2 = chan->pitch_bend;
break;
case FLUID_MOD_PITCHWHEELSENS:
v2 = chan->pitch_wheel_sensitivity;
break;
default:
v1 = 0.0f;
}
}
/* transform the second input value */
switch (mod->flags2 & 0x0f) {
case 0: /* linear, unipolar, positive */
v2 /= range2;
break;
case 1: /* linear, unipolar, negative */
v2 = 1.0f - v2 / range2;
break;
case 2: /* linear, bipolar, positive */
v2 = -1.0f + 2.0f * v2 / range2;
break;
case 3: /* linear, bipolar, negative */
v2 = -1.0f + 2.0f * v2 / range2;
break;
case 4: /* concave, unipolar, positive */
v2 = fluid_concave(v2);
break;
case 5: /* concave, unipolar, negative */
v2 = fluid_concave(127 - v2);
break;
case 6: /* concave, bipolar, positive */
v2 = (v2 > 64)? fluid_concave(2 * (v2 - 64)) : -fluid_concave(2 * (64 - v2));
break;
case 7: /* concave, bipolar, negative */
v2 = (v2 > 64)? -fluid_concave(2 * (v2 - 64)) : fluid_concave(2 * (64 - v2));
break;
case 8: /* convex, unipolar, positive */
v2 = fluid_convex(v2);
break;
case 9: /* convex, unipolar, negative */
v2 = 1.0f - fluid_convex(v2);
break;
case 10: /* convex, bipolar, positive */
v2 = (v2 > 64)? -fluid_convex(2 * (v2 - 64)) : fluid_convex(2 * (64 - v2));
break;
case 11: /* convex, bipolar, negative */
v2 = (v2 > 64)? -fluid_convex(2 * (v2 - 64)) : fluid_convex(2 * (64 - v2));
break;
case 12: /* switch, unipolar, positive */
v2 = (v2 >= 64)? 1.0f : 0.0f;
break;
case 13: /* switch, unipolar, negative */
v2 = (v2 >= 64)? 0.0f : 1.0f;
break;
case 14: /* switch, bipolar, positive */
v2 = (v2 >= 64)? 1.0f : -1.0f;
break;
case 15: /* switch, bipolar, negative */
v2 = (v2 >= 64)? -1.0f : 1.0f;
break;
}
}
else
v2 = 1.0f;
/* it's as simple as that: */
return mod->amount * v1 * v2;
}
/*
* test_identity
*/
/* Purpose:
* Checks, if two modulators are identical.
* SF2.01 section 9.5.1 page 69, 'bullet' 3 defines 'identical'.
*/
bool test_identity(const Mod * mod1, const Mod * mod2)
{
return (mod1->dest == mod2->dest)
&& (mod1->src1 == mod2->src1)
&& (mod1->src2 == mod2->src2)
&& (mod1->flags1 == mod2->flags1)
&& (mod1->flags2 == mod2->flags2);
}
//---------------------------------------------------------
// dump
// debug function: Prints the contents of a modulator
//---------------------------------------------------------
void Mod::dump() const
{
const Mod* mod = this;
int src1 = mod->src1;
int dest = mod->dest;
int src2 = mod->src2;
int flags1 = mod->flags1;
int flags2 = mod->flags2;
float amount = (float)mod->amount;
printf("Src: ");
if (flags1 & FLUID_MOD_CC){
printf("MIDI CC=%i",src1);
}
else {
switch(src1){
case FLUID_MOD_NONE:
printf("None");
break;
case FLUID_MOD_VELOCITY:
printf("note-on velocity");
break;
case FLUID_MOD_KEY:
printf("Key nr");
break;
case FLUID_MOD_KEYPRESSURE:
printf("Poly pressure");
break;
case FLUID_MOD_CHANNELPRESSURE:
printf("Chan pressure");
break;
case FLUID_MOD_PITCHWHEEL:
printf("Pitch Wheel");
break;
case FLUID_MOD_PITCHWHEELSENS:
printf("Pitch Wheel sens");
break;
default:
printf("(unknown: %i)", src1);
} /* switch src1 */
}; /* if not CC */
if (flags1 & FLUID_MOD_NEGATIVE)
printf("- ");
else
{printf("+ ");};
if (flags1 & FLUID_MOD_BIPOLAR)
printf("bip ");
else
printf("unip ");
printf("-> ");
switch(dest){
case GEN_FILTERQ:
printf("Q");
break;
case GEN_FILTERFC:
printf("fc");
break;
case GEN_VIBLFOTOPITCH:
printf("VibLFO-to-pitch");
break;
case GEN_MODENVTOPITCH:
printf("ModEnv-to-pitch");
break;
case GEN_MODLFOTOPITCH:
printf("ModLFO-to-pitch");
break;
case GEN_CHORUSSEND:
printf("Chorus send");
break;
case GEN_REVERBSEND:
printf("Reverb send");
break;
case GEN_PAN:
printf("pan");
break;
case GEN_ATTENUATION:
printf("att");
break;
default:
printf("dest %i", dest);
break;
} /* switch dest */
printf(", amount %f flags %i src2 %i flags2 %i\n",amount, flags1, src2, flags2);
}
}
|
