/[svn]/linuxsampler/trunk/src/engines/sf2/SF2SignalUnitRack.cpp
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Contents of /linuxsampler/trunk/src/engines/sf2/SF2SignalUnitRack.cpp

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Revision 3612 - (show annotations) (download)
Mon Sep 30 18:03:43 2019 UTC (4 years, 6 months ago) by schoenebeck
File size: 11670 byte(s)
Added new LFO implementations:

* Added int math square LFO implementation.

* Added int math saw LFO implementation.

* Added numeric complex nr sine LFO implementation.

* Added public API C++ class "LFO", which is a cluster class
  encapsulating all the sampler's LFO implementations to be used by
  3rd party applications (e.g. by Gigedit).

* Marked class LFOTriangleDiHarmonic as deprecated
  (will be removed in future).

* Added LFOAll.h which includes all LFO implementation's header files.

* Fixed benchmarks/triang.cpp falsely having favoured "int math abs"
  algorithm (since result of 2nd run was not accumulated).

* Added benchmark for saw wave (benchmarks/saw.cpp).

* Added benchmark for sine wave (benchmarks/sine.cpp).

* Added benchmark for square wave (benchmarks/square.cpp).

* Increased amount of benchmarks runs by factor 6 to achieve benchmark
  times which are large enough on modern systems.

* Cleanup of LFO APIs.

* Bumped version (2.1.1.svn18).

1 /***************************************************************************
2 * *
3 * LinuxSampler - modular, streaming capable sampler *
4 * *
5 * Copyright (C) 2011 - 2012 Grigor Iliev *
6 * *
7 * This program is free software; you can redistribute it and/or modify *
8 * it under the terms of the GNU General Public License as published by *
9 * the Free Software Foundation; either version 2 of the License, or *
10 * (at your option) any later version. *
11 * *
12 * This program is distributed in the hope that it will be useful, *
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
15 * GNU General Public License for more details. *
16 * *
17 * You should have received a copy of the GNU General Public License *
18 * along with this program; if not, write to the Free Software *
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
20 * MA 02111-1307 USA *
21 ***************************************************************************/
22
23 #include "SF2SignalUnitRack.h"
24 #include "Voice.h"
25
26 namespace LinuxSampler { namespace sf2 {
27
28 SFSignalUnit::SFSignalUnit(SF2SignalUnitRack* rack): SignalUnit(rack), pVoice(NULL) {
29
30 }
31
32 void EGUnit::EnterReleaseStage() {
33 update(EG::event_release, pVoice->GetSampleRate() / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
34 }
35
36 void EGUnit::CancelRelease() {
37 update(EG::event_cancel_release, pVoice->GetSampleRate() / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
38 }
39
40
41 void VolEGUnit::Trigger() {
42 // set the delay trigger
43 double d = pVoice->GetSampleRate() / CONFIG_DEFAULT_SUBFRAGMENT_SIZE;
44 uiDelayTrigger = pVoice->pRegion->GetEG1PreAttackDelay(pVoice->pPresetRegion) * d;
45 ////////////
46
47 // GetEG1Sustain gets the decrease in level in centibels
48 uint sustain = ::sf2::ToRatio(-1 * pVoice->pRegion->GetEG1Sustain(pVoice->pPresetRegion)) * 1000; // in permille
49 if (pVoice->pNote) {
50 pVoice->pNote->Override.Sustain.applyTo(sustain);
51 }
52
53 trigger (
54 0, // should be in permille
55 pVoice->pRegion->GetEG1Attack(pVoice->pPresetRegion),
56 pVoice->pRegion->GetEG1Hold(pVoice->pPresetRegion),
57 pVoice->pRegion->GetEG1Decay(pVoice->pPresetRegion),
58 sustain,
59 pVoice->pRegion->GetEG1Release(pVoice->pPresetRegion),
60 pVoice->GetSampleRate() / CONFIG_DEFAULT_SUBFRAGMENT_SIZE,
61 false
62 );
63 }
64
65 void VolEGUnit::Increment() {
66 if (DelayStage()) return;
67
68 EGUnit::Increment();
69 if (!active()) return;
70
71 switch (getSegmentType()) {
72 case EG::segment_lin:
73 processLin();
74 break;
75 case EG::segment_exp:
76 processExp();
77 break;
78 case EG::segment_end:
79 getLevel();
80 break; // noop
81 case EG::segment_pow:
82 processPow();
83 break;
84 }
85
86 if (active()) {
87
88 // if sample has a loop and loop start has been reached in this subfragment, send a special event to EG1 to let it finish the attack hold stage
89 /*if (pVoice->SmplInfo.HasLoops && pVoice->Pos <= pVoice->SmplInfo.LoopStart && pVoice->SmplInfo.LoopStart < newPos) {
90 update(EG::event_hold_end, pVoice->GetSampleRate() / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
91 }*/
92 // TODO: ^^^
93
94 increment(1);
95 if (!toStageEndLeft()) update(EG::event_stage_end, pVoice->GetSampleRate() / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
96 }
97 }
98
99 void ModEGUnit::Trigger() {
100 double d = pVoice->GetSampleRate() / CONFIG_DEFAULT_SUBFRAGMENT_SIZE;
101 uiDelayTrigger = pVoice->pRegion->GetEG2PreAttackDelay(pVoice->pPresetRegion) * d;
102
103 trigger (
104 0, // should be in permille
105 pVoice->pRegion->GetEG2Attack(pVoice->pPresetRegion),
106 pVoice->pRegion->GetEG2Hold(pVoice->pPresetRegion),
107 pVoice->pRegion->GetEG2Decay(pVoice->pPresetRegion),
108 uint(1000 - pVoice->pRegion->GetEG2Sustain(pVoice->pPresetRegion)),
109 pVoice->pRegion->GetEG2Release(pVoice->pPresetRegion),
110 pVoice->GetSampleRate() / CONFIG_DEFAULT_SUBFRAGMENT_SIZE,
111 true
112 );
113 }
114
115 void ModEGUnit::Increment() {
116 if (DelayStage()) return;
117
118 EGUnit::Increment();
119 if (!active()) return;
120
121 switch (getSegmentType()) {
122 case EG::segment_lin:
123 processLin();
124 break;
125 case EG::segment_exp:
126 processExp();
127 break;
128 case EG::segment_end:
129 getLevel();
130 break; // noop
131 case EG::segment_pow:
132 processPow();
133 break;
134 }
135
136 if (active()) {
137 increment(1);
138 if (!toStageEndLeft()) update(EG::event_stage_end, pVoice->GetSampleRate() / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
139 }
140 }
141
142
143 void ModLfoUnit::Trigger() {
144 //reset
145 Level = 0;
146
147 // set the delay trigger
148 double samplerate = pVoice->GetSampleRate() / CONFIG_DEFAULT_SUBFRAGMENT_SIZE;
149 uiDelayTrigger = pVoice->pRegion->GetDelayModLfo(pVoice->pPresetRegion) * samplerate;
150 ////////////
151
152 trigger (
153 pVoice->pRegion->GetFreqModLfo(pVoice->pPresetRegion),
154 LFO::start_level_min,
155 1, 0, false, samplerate
156 );
157 updateByMIDICtrlValue(0);
158 }
159
160 void ModLfoUnit::Increment() {
161 if (DelayStage()) return;
162
163 SignalUnit::Increment();
164
165 Level = render();
166 }
167
168
169 void VibLfoUnit::Trigger() {
170 //reset
171 Level = 0;
172
173 // set the delay trigger
174 double samplerate = pVoice->GetSampleRate() / CONFIG_DEFAULT_SUBFRAGMENT_SIZE;
175 uiDelayTrigger = pVoice->pRegion->GetDelayVibLfo(pVoice->pPresetRegion) * samplerate;
176 ////////////
177
178 trigger (
179 pVoice->pRegion->GetFreqVibLfo(pVoice->pPresetRegion),
180 LFO::start_level_min,
181 pVoice->pRegion->GetVibLfoToPitch(pVoice->pPresetRegion),
182 0, false, samplerate
183 );
184 updateByMIDICtrlValue(0);
185 }
186
187 void VibLfoUnit::Increment() {
188 if (DelayStage()) return;
189
190 SignalUnit::Increment();
191
192 Level = render();
193 }
194
195
196 EndpointUnit::EndpointUnit(SF2SignalUnitRack* rack): EndpointSignalUnit(rack) {
197
198 }
199
200 void EndpointUnit::Trigger() {
201 prmModEgPitch->Coeff = pVoice->pRegion->GetModEnvToPitch(pVoice->pPresetRegion);
202 if (prmModEgPitch->Coeff == ::sf2::NONE) prmModEgPitch->Coeff = 0;
203
204 prmModEgCutoff->Coeff = pVoice->pRegion->GetModEnvToFilterFc(pVoice->pPresetRegion); // cents
205 if (prmModEgCutoff->Coeff == ::sf2::NONE) prmModEgCutoff->Coeff = 0;
206
207 prmModLfoVol->Coeff = pVoice->pRegion->GetModLfoToVolume(pVoice->pPresetRegion); // centibels
208 if (prmModLfoVol->Coeff == ::sf2::NONE) prmModLfoVol->Coeff = 0;
209
210 prmModLfoCutoff->Coeff = pVoice->pRegion->GetModLfoToFilterFc(pVoice->pPresetRegion);
211 if (prmModLfoCutoff->Coeff == ::sf2::NONE) prmModLfoCutoff->Coeff = 0;
212
213 prmModLfoPitch->Coeff = pVoice->pRegion->GetModLfoToPitch(pVoice->pPresetRegion);
214 if (prmModLfoPitch->Coeff == ::sf2::NONE) prmModLfoPitch->Coeff = 0;
215 }
216
217 bool EndpointUnit::Active() {
218 return prmVolEg->pUnit->Active(); // volEGUnit
219 }
220
221 float EndpointUnit::GetVolume() {
222 if (!prmVolEg->pUnit->Active()) return 0;
223 return prmVolEg->GetValue() *
224 ::sf2::ToRatio(prmModLfoVol->GetValue() /*logarithmically modified */);
225 }
226
227 float EndpointUnit::GetFilterCutoff() {
228 double modEg, modLfo;
229 modEg = prmModEgCutoff->pUnit->Active() ? prmModEgCutoff->GetValue() : 0;
230 modEg = RTMath::CentsToFreqRatioUnlimited(modEg);
231
232 modLfo = prmModLfoCutoff->pUnit->Active() ? prmModLfoCutoff->GetValue() : 0;
233 modLfo = RTMath::CentsToFreqRatioUnlimited(modLfo);
234
235 return modEg * modLfo;
236 }
237
238 float EndpointUnit::GetPitch() {
239 double modEg, modLfo, vibLfo;
240 modEg = prmModEgPitch->pUnit->Active() ? RTMath::CentsToFreqRatioUnlimited(prmModEgPitch->GetValue()) : 1;
241 modLfo = prmModLfoPitch->pUnit->Active() ? RTMath::CentsToFreqRatioUnlimited(prmModLfoPitch->GetValue()) : 1;
242 vibLfo = prmVibLfo->pUnit->Active() ? RTMath::CentsToFreqRatioUnlimited(prmVibLfo->GetValue()) : 1;
243
244 return modEg * modLfo * vibLfo;
245 }
246
247 float EndpointUnit::GetResonance() {
248 return 1;
249 }
250
251 SF2SignalUnitRack::SF2SignalUnitRack(Voice* voice)
252 : SignalUnitRack(MaxUnitCount), suVolEG(this), suModEG(this), suModLfo(this), suVibLfo(this), suEndpoint(this), pVoice(voice) {
253
254 suVolEG.pVoice = suModEG.pVoice = suModLfo.pVoice = suVibLfo.pVoice = suEndpoint.pVoice = voice;
255 Units.add(&suVolEG);
256 Units.add(&suModEG);
257 Units.add(&suModLfo);
258 Units.add(&suVibLfo);
259 Units.add(&suEndpoint);
260
261 // Volume envelope
262 suEndpoint.Params.add(SignalUnit::Parameter(&suVolEG)); // Volume
263 // Modulation envelope
264 suEndpoint.Params.add(SignalUnit::Parameter(&suModEG)); // Pitch
265 suEndpoint.Params.add(SignalUnit::Parameter(&suModEG)); // Filter cutoff
266 // Modulation LFO
267 suEndpoint.Params.add(SignalUnit::Parameter(&suModLfo)); // Volume
268 suEndpoint.Params.add(SignalUnit::Parameter(&suModLfo)); // Pitch
269 suEndpoint.Params.add(SignalUnit::Parameter(&suModLfo)); // Filter cutoff
270 // Vibrato LFO
271 suEndpoint.Params.add(SignalUnit::Parameter(&suVibLfo)); // Pitch
272
273 /* This should be done at the end because when a parameter is added to
274 ArrayList a new copy is made for all parameters */
275 suEndpoint.prmVolEg = &suEndpoint.Params[0];
276 suEndpoint.prmModEgPitch = &suEndpoint.Params[1];
277 suEndpoint.prmModEgCutoff = &suEndpoint.Params[2];
278 suEndpoint.prmModLfoVol = &suEndpoint.Params[3];
279 suEndpoint.prmModLfoPitch = &suEndpoint.Params[4];
280 suEndpoint.prmModLfoCutoff = &suEndpoint.Params[5];
281 suEndpoint.prmVibLfo = &suEndpoint.Params[6];
282 }
283
284 EndpointSignalUnit* SF2SignalUnitRack::GetEndpointUnit() {
285 return static_cast<EndpointSignalUnit*> (&suEndpoint);
286 }
287
288 void SF2SignalUnitRack::EnterFadeOutStage() {
289 suVolEG.enterFadeOutStage();
290 }
291
292 void SF2SignalUnitRack::EnterFadeOutStage(int maxFadeOutSteps) {
293 suVolEG.enterFadeOutStage(maxFadeOutSteps);
294 }
295
296 void SF2SignalUnitRack::CalculateFadeOutCoeff(float FadeOutTime, float SampleRate) {
297 suVolEG.CalculateFadeOutCoeff(FadeOutTime, SampleRate);
298 }
299 }} // namespace LinuxSampler::sf2

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