/[svn]/linuxsampler/trunk/src/engines/sfz/SfzSignalUnitRack.h
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Contents of /linuxsampler/trunk/src/engines/sfz/SfzSignalUnitRack.h

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Revision 2223 - (show annotations) (download) (as text)
Fri Jul 29 13:39:58 2011 UTC (12 years, 8 months ago) by iliev
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File size: 11151 byte(s)
* implemented sine LFO, pulse LFO and saw LFO
* sfz engine: implemented opcode lfoN_wave

1 /***************************************************************************
2 * *
3 * LinuxSampler - modular, streaming capable sampler *
4 * *
5 * Copyright (C) 2011 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 #ifndef __LS_SFZSIGNALUNITRACK_H__
24 #define __LS_SFZSIGNALUNITRACK_H__
25
26 #include "../common/SignalUnitRack.h"
27 #include "EG.h"
28 #include "EGADSR.h"
29 #include "../common/AbstractVoice.h"
30 #include "../common/PulseLFO.h"
31 #include "../common/SawLFO.h"
32 #include "../common/SineLFO.h"
33
34 namespace LinuxSampler { namespace sfz {
35 const int MaxUnitCount = 1000;
36 const int maxEgCount = 100; // Maximum number of v2 envelope generators
37 const int maxLfoCount = 100; // Maximum number of v2 LFOs
38
39 class Voice;
40 class SfzSignalUnitRack;
41
42 class SfzSignalUnit: public SignalUnit {
43 public:
44 Voice* pVoice;
45
46 SfzSignalUnit(SfzSignalUnitRack* rack);
47 SfzSignalUnit(const SfzSignalUnit& Unit): SignalUnit(Unit.pRack) { Copy(Unit); }
48
49 void Copy(const SfzSignalUnit& Unit) {
50 pVoice = Unit.pVoice;
51
52 SignalUnit::Copy(Unit);
53 }
54
55 double GetSampleRate();
56 };
57
58 template <class T>
59 class EGUnit: public SfzSignalUnit {
60 public:
61 ::sfz::EG* pEGInfo;
62 T EG;
63
64 EGUnit(SfzSignalUnitRack* rack): SfzSignalUnit(rack), pEGInfo(NULL) { }
65 EGUnit(const EGUnit& Unit): SfzSignalUnit(Unit) { Copy(Unit); }
66 void operator=(const EGUnit& Unit) { Copy(Unit); }
67
68 void Copy(const EGUnit& Unit) {
69 pEGInfo = Unit.pEGInfo;
70
71 SfzSignalUnit::Copy(Unit);
72 }
73
74 virtual bool Active() { return EG.active(); }
75 virtual float GetLevel() { return DelayStage() ? 0 : EG.getLevel(); }
76
77 virtual void EnterReleaseStage() { EG.update(EG::event_release, GetSampleRate()); }
78 virtual void CancelRelease() { EG.update(EG::event_cancel_release, GetSampleRate()); }
79
80 virtual void Increment() {
81 if (DelayStage()) return;
82
83 SfzSignalUnit::Increment();
84 if (!EG.active()) return;
85
86 switch (EG.getSegmentType()) {
87 case EG::segment_lin:
88 EG.processLin();
89 break;
90 case EG::segment_exp:
91 EG.processExp();
92 break;
93 case EG::segment_end:
94 EG.getLevel();
95 break; // noop
96 case EG::segment_pow:
97 EG.processPow();
98 break;
99 }
100
101 if (EG.active()) {
102 EG.increment(1);
103 if (!EG.toStageEndLeft()) EG.update(EG::event_stage_end, GetSampleRate());
104 }
105 }
106 };
107
108 class EGv1Unit: public EGUnit<EGADSR> {
109 public:
110 int depth;
111 EGv1Unit(SfzSignalUnitRack* rack): EGUnit<EGADSR>(rack), depth(0) { }
112 virtual void Trigger();
113 };
114
115 class EGv2Unit: public EGUnit< ::LinuxSampler::sfz::EG> {
116 public:
117 EGv2Unit(SfzSignalUnitRack* rack): EGUnit< ::LinuxSampler::sfz::EG>(rack) { }
118 virtual void Trigger();
119 };
120
121 class PitchEGUnit: public EGv1Unit {
122 public:
123 PitchEGUnit(SfzSignalUnitRack* rack): EGv1Unit(rack) { }
124 virtual void Trigger();
125 };
126
127 class FilEGUnit: public EGv1Unit {
128 public:
129 FilEGUnit(SfzSignalUnitRack* rack): EGv1Unit(rack) { }
130 virtual void Trigger();
131 };
132
133 class AbstractLfo {
134 public:
135 virtual float Render() = 0;
136 virtual void Update(const uint16_t& ExtControlValue) = 0;
137 virtual void Trigger(float Frequency, start_level_t StartLevel, uint16_t InternalDepth, uint16_t ExtControlDepth, bool FlipPhase, unsigned int SampleRate) = 0;
138 };
139
140 template <class T>
141 class LfoBase: public AbstractLfo, public T {
142 public:
143 LfoBase(float Max): T(Max) { }
144 virtual float Render() { return T::render(); }
145
146 virtual void Update(const uint16_t& ExtControlValue) { T::update(ExtControlValue); }
147
148 virtual void Trigger (
149 float Frequency, start_level_t StartLevel, uint16_t InternalDepth,
150 uint16_t ExtControlDepth, bool FlipPhase, unsigned int SampleRate
151 ) {
152 T::trigger(Frequency, StartLevel, InternalDepth, ExtControlDepth, FlipPhase, SampleRate);
153 }
154 };
155
156 class LFOUnit: public SfzSignalUnit {
157 public:
158 ::sfz::LFO* pLfoInfo;
159 AbstractLfo* pLFO;
160
161 LFOUnit(SfzSignalUnitRack* rack): SfzSignalUnit(rack), pLfoInfo(NULL), pLFO(NULL) { }
162 LFOUnit(const LFOUnit& Unit): SfzSignalUnit(Unit) { Copy(Unit); }
163 void operator=(const LFOUnit& Unit) { Copy(Unit); }
164
165 void Copy(const LFOUnit& Unit) {
166 pLfoInfo = Unit.pLfoInfo;
167
168 SfzSignalUnit::Copy(Unit);
169 }
170
171 virtual bool Active() { return true; }
172 virtual void Trigger();
173 virtual void Increment();
174 virtual float GetLevel() { return Level; }
175 };
176
177 class LFOv1Unit: public LFOUnit {
178 public:
179 ::sfz::LFO lfoInfo;
180 LfoBase<LFOSigned> lfo;
181
182 LFOv1Unit(SfzSignalUnitRack* rack): LFOUnit(rack), lfo(1200.0f) {
183 pLfoInfo = &lfoInfo; pLFO = &lfo;
184 }
185
186 virtual void Trigger();
187 };
188
189 class LFOv2Unit: public LFOUnit {
190 protected:
191 FixedArray<AbstractLfo*> lfos;
192 LfoBase<LFOSigned> lfo0; // triangle
193 LfoBase<SineLFO<range_signed> > lfo1; // sine
194 LfoBase<PulseLFO<range_unsigned, 750> > lfo2; // pulse 75%
195 LfoBase<SquareLFO<range_signed> > lfo3; // square
196 LfoBase<PulseLFO<range_unsigned, 250> > lfo4; // pulse 25%
197 LfoBase<PulseLFO<range_unsigned, 125> > lfo5; // pulse 12,5%
198 LfoBase<SawLFO<range_unsigned, true> > lfo6; // saw up
199 LfoBase<SawLFO<range_unsigned, false> > lfo7; // saw down
200
201
202 public:
203 LFOv2Unit(SfzSignalUnitRack* rack);
204
205 virtual void Trigger();
206 };
207
208 class AmpLFOUnit: public LFOv1Unit {
209 public:
210 AmpLFOUnit(SfzSignalUnitRack* rack): LFOv1Unit(rack) { }
211
212 virtual void Trigger();
213 };
214
215 class PitchLFOUnit: public LFOv1Unit {
216 public:
217 PitchLFOUnit(SfzSignalUnitRack* rack): LFOv1Unit(rack) { }
218
219 virtual void Trigger();
220 };
221
222 class FilLFOUnit: public LFOv1Unit {
223 public:
224 FilLFOUnit(SfzSignalUnitRack* rack): LFOv1Unit(rack) { }
225
226 virtual void Trigger();
227 };
228
229
230
231 class EndpointUnit : public EndpointSignalUnit {
232 public:
233 Voice* pVoice;
234
235 EndpointUnit(SfzSignalUnitRack* rack);
236
237 virtual void Trigger();
238
239 /** The endpoint should be active until the volume EG is active. */
240 virtual bool Active();
241
242 virtual float GetVolume();
243 virtual float GetFilterCutoff();
244 virtual float GetPitch();
245 virtual float GetResonance();
246 virtual float GetPan();
247
248 SfzSignalUnitRack* const GetRack();
249
250 virtual float CalculateResonance(float res) {
251 return GetResonance() + res;
252 }
253 };
254
255
256 class SfzSignalUnitRack : public SignalUnitRack {
257 private:
258 EndpointUnit suEndpoint;
259 EGv1Unit suVolEG;
260 FilEGUnit suFilEG;
261 PitchEGUnit suPitchEG;
262
263 AmpLFOUnit suAmpLFO;
264 PitchLFOUnit suPitchLFO;
265 FilLFOUnit suFilLFO;
266
267 FixedArray<EGv2Unit*> EGs;
268
269 // used for optimization - contains only the ones that are modulating volume
270 FixedArray<EGv2Unit*> volEGs;
271
272 // used for optimization - contains only the ones that are modulating pitch
273 FixedArray<EGv2Unit*> pitchEGs;
274
275
276 FixedArray<LFOv2Unit*> LFOs;
277
278 // used for optimization - contains only the ones that are modulating filter cutoff
279 FixedArray<LFOv2Unit*> filLFOs;
280
281 // used for optimization - contains only the ones that are modulating resonance
282 FixedArray<LFOv2Unit*> resLFOs;
283
284 // used for optimization - contains only the ones that are modulating pan
285 FixedArray<LFOv2Unit*> panLFOs;
286
287
288 public:
289 Voice* const pVoice;
290
291 /**
292 * @param Voice The voice to which this rack belongs.
293 */
294 SfzSignalUnitRack(Voice* voice);
295 ~SfzSignalUnitRack();
296
297 virtual EndpointSignalUnit* GetEndpointUnit();
298
299 virtual void Trigger();
300 virtual void EnterFadeOutStage();
301
302 friend class EndpointUnit;
303 };
304 }} // namespace LinuxSampler::sfz
305
306 #endif /* __LS_SFZSIGNALUNITRACK_H__ */
307

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