/[svn]/linuxsampler/trunk/src/engines/sfz/Voice.cpp
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Contents of /linuxsampler/trunk/src/engines/sfz/Voice.cpp

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Revision 2879 - (show annotations) (download)
Tue Apr 19 14:07:53 2016 UTC (2 years, 3 months ago) by schoenebeck
File size: 13560 byte(s)
* All engines: Active voices are now internally grouped to "Note" objects,
  instead of being directly assigned to a keyboard key. This allows more
  fine graded processing of voices, which is i.e. required for certain
  instrument script features.
* Built-in script function "play_note()": Added support for passing
  special value -1 for "duration-us" argument, which will cause the
  triggered note to be released once the original note was released.
* Bumped version (2.0.0.svn3).

1 /***************************************************************************
2 * *
3 * LinuxSampler - modular, streaming capable sampler *
4 * *
5 * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6 * Copyright (C) 2005 - 2008 Christian Schoenebeck *
7 * Copyright (C) 2009 - 2015 Christian Schoenebeck and Grigor Iliev *
8 * *
9 * This program is free software; you can redistribute it and/or modify *
10 * it under the terms of the GNU General Public License as published by *
11 * the Free Software Foundation; either version 2 of the License, or *
12 * (at your option) any later version. *
13 * *
14 * This program is distributed in the hope that it will be useful, *
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
17 * GNU General Public License for more details. *
18 * *
19 * You should have received a copy of the GNU General Public License *
20 * along with this program; if not, write to the Free Software *
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
22 * MA 02111-1307 USA *
23 ***************************************************************************/
24
25 #include "Voice.h"
26
27 #include "Engine.h"
28 #include "EngineChannel.h"
29
30 #define LN_10_DIV_20 0.115129254649702
31
32 namespace LinuxSampler { namespace sfz {
33
34 typedef LinuxSampler::VoiceBase<EngineChannel, ::sfz::Region, Sample, DiskThread> SfzVoice;
35 Voice::Voice(): SignalRack(this), SfzVoice(&SignalRack) {
36 pEngine = NULL;
37 bEqSupport = true;
38 }
39
40 Voice::~Voice() {
41
42 }
43
44 EngineChannel* Voice::GetSfzEngineChannel() {
45 return static_cast<EngineChannel*>(pEngineChannel);
46 }
47
48 void Voice::SetEngine(LinuxSampler::Engine* pEngine) {
49 Engine* engine = static_cast<Engine*>(pEngine);
50 this->pEngine = engine;
51 this->pDiskThread = engine->pDiskThread;
52 dmsg(6,("Voice::SetEngine()\n"));
53 }
54
55 Voice::SampleInfo Voice::GetSampleInfo() {
56 SampleInfo si;
57 si.SampleRate = pSample->GetSampleRate();
58 si.ChannelCount = pSample->GetChannelCount();
59 si.FrameSize = pSample->GetFrameSize();
60 si.BitDepth = (pSample->GetFrameSize() / pSample->GetChannelCount()) * 8;
61 si.TotalFrameCount = pSample->GetTotalFrameCount();
62
63 si.HasLoops = pRegion->HasLoop();
64 si.LoopStart = pRegion->GetLoopStart();
65 si.LoopLength = pRegion->GetLoopEnd() - pRegion->GetLoopStart();
66 si.LoopPlayCount = pRegion->GetLoopCount();
67 si.Unpitched = pRegion->pitch_keytrack == 0;
68 return si;
69 }
70
71 Voice::RegionInfo Voice::GetRegionInfo() {
72 RegionInfo ri;
73 ri.UnityNote = pRegion->pitch_keycenter;
74 ri.FineTune = pRegion->tune + pRegion->transpose * 100;
75 ri.Pan = int(pRegion->pan * 0.63); // convert from -100..100 to -64..63
76 ri.SampleStartOffset = pRegion->offset ? *(pRegion->offset) : 0;
77
78 ri.VCFEnabled = pRegion->cutoff;
79 switch (pRegion->fil_type) {
80 case ::sfz::LPF_1P:
81 ri.VCFType = Filter::vcf_type_1p_lowpass;
82 break;
83 case ::sfz::LPF_2P:
84 ri.VCFType = Filter::vcf_type_2p_lowpass;
85 break;
86 case ::sfz::LPF_4P:
87 ri.VCFType = Filter::vcf_type_4p_lowpass;
88 break;
89 case ::sfz::LPF_6P:
90 ri.VCFType = Filter::vcf_type_6p_lowpass;
91 break;
92 case ::sfz::HPF_1P:
93 ri.VCFType = Filter::vcf_type_1p_highpass;
94 break;
95 case ::sfz::HPF_2P:
96 ri.VCFType = Filter::vcf_type_2p_highpass;
97 break;
98 case ::sfz::HPF_4P:
99 ri.VCFType = Filter::vcf_type_4p_highpass;
100 break;
101 case ::sfz::HPF_6P:
102 ri.VCFType = Filter::vcf_type_6p_highpass;
103 break;
104 case ::sfz::BPF_1P:
105 case ::sfz::BPF_2P:
106 ri.VCFType = Filter::vcf_type_2p_bandpass;
107 break;
108 case ::sfz::BRF_1P:
109 case ::sfz::BRF_2P:
110 ri.VCFType = Filter::vcf_type_2p_bandreject;
111 break;
112 case ::sfz::APF_1P:
113 case ::sfz::PKF_2P:
114 default:
115 ri.VCFEnabled = false;
116 break;
117 }
118
119 ri.VCFResonance = pRegion->resonance;
120
121 // rt_decay is in dB. Precalculate a suitable value for exp in
122 // GetReleaseTriggerAttenuation: -ln(10) / 20 * rt_decay
123 ri.ReleaseTriggerDecay = -LN_10_DIV_20 * pRegion->rt_decay;
124
125 return ri;
126 }
127
128 Voice::InstrumentInfo Voice::GetInstrumentInfo() {
129 InstrumentInfo ii;
130 ii.FineTune = 0; // TODO:
131 ii.PitchbendRange = 2; // TODO:
132
133 return ii;
134 }
135
136 double Voice::GetSampleAttenuation() {
137 return exp(LN_10_DIV_20 * pRegion->volume) * pRegion->amplitude / 100;
138 }
139
140 double Voice::GetVelocityAttenuation(uint8_t MIDIKeyVelocity) {
141 float offset = -pRegion->amp_veltrack;
142 if (offset <= 0) offset += 100;
143 return (offset + pRegion->amp_veltrack * pRegion->amp_velcurve[MIDIKeyVelocity]) / 100;
144 }
145
146 double Voice::GetVelocityRelease(uint8_t MIDIKeyVelocity) {
147 return 127.0 / MIDIKeyVelocity;
148 }
149
150 void Voice::ProcessCCEvent(RTList<Event>::Iterator& itEvent) {
151 /*if (itEvent->Type == Event::type_control_change && itEvent->Param.CC.Controller) { // if (valid) MIDI control change event
152 if (pRegion->AttenuationController.type == ::gig::attenuation_ctrl_t::type_controlchange &&
153 itEvent->Param.CC.Controller == pRegion->AttenuationController.controller_number) {
154 CrossfadeSmoother.update(AbstractEngine::CrossfadeCurve[CrossfadeAttenuation(itEvent->Param.CC.Value)]);
155 }
156 }*/ // TODO: ^^^
157 }
158
159 void Voice::ProcessChannelPressureEvent(RTList<Event>::Iterator& itEvent) {
160 //TODO: ...
161 }
162
163 void Voice::ProcessPolyphonicKeyPressureEvent(RTList<Event>::Iterator& itEvent) {
164 //TODO: ...
165 }
166
167 double Voice::CalculateCrossfadeVolume(uint8_t MIDIKeyVelocity) {
168 /*float crossfadeVolume;
169 switch (pRegion->AttenuationController.type) {
170 case ::gig::attenuation_ctrl_t::type_channelaftertouch:
171 crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(GetSfzEngineChannel()->ControllerTable[128])];
172 break;
173 case ::gig::attenuation_ctrl_t::type_velocity:
174 crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(MIDIKeyVelocity)];
175 break;
176 case ::gig::attenuation_ctrl_t::type_controlchange: //FIXME: currently not sample accurate
177 crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(GetSfzEngineChannel()->ControllerTable[pRegion->AttenuationController.controller_number])];
178 break;
179 case ::gig::attenuation_ctrl_t::type_none: // no crossfade defined
180 default:
181 crossfadeVolume = 1.0f;
182 }
183
184 return crossfadeVolume;*/ // TODO: ^^^
185 return 1.0f;
186 }
187
188 double Voice::GetEG1ControllerValue(uint8_t MIDIKeyVelocity) {
189 /*double eg1controllervalue = 0;
190 switch (pRegion->EG1Controller.type) {
191 case ::gig::eg1_ctrl_t::type_none: // no controller defined
192 eg1controllervalue = 0;
193 break;
194 case ::gig::eg1_ctrl_t::type_channelaftertouch:
195 eg1controllervalue = GetSfzEngineChannel()->ControllerTable[128];
196 break;
197 case ::gig::eg1_ctrl_t::type_velocity:
198 eg1controllervalue = MIDIKeyVelocity;
199 break;
200 case ::gig::eg1_ctrl_t::type_controlchange: // MIDI control change controller
201 eg1controllervalue = GetSfzEngineChannel()->ControllerTable[pRegion->EG1Controller.controller_number];
202 break;
203 }
204 if (pRegion->EG1ControllerInvert) eg1controllervalue = 127 - eg1controllervalue;
205
206 return eg1controllervalue;*/ // TODO: ^^^
207 return 0;
208 }
209
210 Voice::EGInfo Voice::CalculateEG1ControllerInfluence(double eg1ControllerValue) {
211 /*EGInfo eg;
212 // (eg1attack is different from the others)
213 eg.Attack = (pRegion->EG1ControllerAttackInfluence) ?
214 1 + 0.031 * (double) (pRegion->EG1ControllerAttackInfluence == 1 ?
215 1 : 1 << pRegion->EG1ControllerAttackInfluence) * eg1ControllerValue : 1.0;
216 eg.Decay = (pRegion->EG1ControllerDecayInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG1ControllerDecayInfluence) * eg1ControllerValue : 1.0;
217 eg.Release = (pRegion->EG1ControllerReleaseInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG1ControllerReleaseInfluence) * eg1ControllerValue : 1.0;
218
219 return eg;*/ // TODO: ^^^
220 EGInfo eg;
221 eg.Attack = 1.0;
222 eg.Decay = 1.0;
223 eg.Release = 1.0;
224 return eg;
225 }
226
227 double Voice::GetEG2ControllerValue(uint8_t MIDIKeyVelocity) {
228 /*double eg2controllervalue = 0;
229 switch (pRegion->EG2Controller.type) {
230 case ::gig::eg2_ctrl_t::type_none: // no controller defined
231 eg2controllervalue = 0;
232 break;
233 case ::gig::eg2_ctrl_t::type_channelaftertouch:
234 eg2controllervalue = GetSfzEngineChannel()->ControllerTable[128];
235 break;
236 case ::gig::eg2_ctrl_t::type_velocity:
237 eg2controllervalue = MIDIKeyVelocity;
238 break;
239 case ::gig::eg2_ctrl_t::type_controlchange: // MIDI control change controller
240 eg2controllervalue = GetSfzEngineChannel()->ControllerTable[pRegion->EG2Controller.controller_number];
241 break;
242 }
243 if (pRegion->EG2ControllerInvert) eg2controllervalue = 127 - eg2controllervalue;
244
245 return eg2controllervalue;*/ // TODO: ^^^
246 return 0;
247 }
248
249 Voice::EGInfo Voice::CalculateEG2ControllerInfluence(double eg2ControllerValue) {
250 /*EGInfo eg;
251 eg.Attack = (pRegion->EG2ControllerAttackInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerAttackInfluence) * eg2ControllerValue : 1.0;
252 eg.Decay = (pRegion->EG2ControllerDecayInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerDecayInfluence) * eg2ControllerValue : 1.0;
253 eg.Release = (pRegion->EG2ControllerReleaseInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerReleaseInfluence) * eg2ControllerValue : 1.0;
254
255 return eg;*/ // TODO: ^^^
256 EGInfo eg;
257 eg.Attack = 1.0;
258 eg.Decay = 1.0;
259 eg.Release = 1.0;
260 return eg;
261 }
262
263 float Voice::CalculateCutoffBase(uint8_t MIDIKeyVelocity) {
264 float cutoff = *pRegion->cutoff;
265 cutoff *= RTMath::CentsToFreqRatioUnlimited(
266 MIDIKeyVelocity / 127.0f * pRegion->fil_veltrack +
267 (MIDIKey() - pRegion->fil_keycenter) * pRegion->fil_keytrack);
268 return cutoff;
269 }
270
271 float Voice::CalculateFinalCutoff(float cutoffBase) {
272 float cutoff = cutoffBase;
273 if (cutoff > 0.49 * pEngine->SampleRate) cutoff = 0.49 * pEngine->SampleRate;
274 return cutoff;
275 }
276
277 float Voice::GetReleaseTriggerAttenuation(float noteLength) {
278 // pow(10, -rt_decay * noteLength / 20):
279 return expf(RgnInfo.ReleaseTriggerDecay * noteLength);
280 }
281
282 void Voice::ProcessGroupEvent(RTList<Event>::Iterator& itEvent) {
283 dmsg(4,("Voice %p processGroupEvents event type=%d", (void*)this, itEvent->Type));
284 if (itEvent->Type == Event::type_control_change ||
285 (Type & Voice::type_controller_triggered) ||
286 itEvent->Param.Note.Key != HostKey()) {
287 dmsg(4,("Voice %p - kill", (void*)this));
288 if (pRegion->off_mode == ::sfz::OFF_NORMAL) {
289 // turn off the voice by entering release envelope stage
290 EnterReleaseStage();
291 } else {
292 // kill the voice fast
293 SignalRack.EnterFadeOutStage();
294 }
295 }
296 }
297
298 void Voice::SetSampleStartOffset() {
299 if (DiskVoice && RgnInfo.SampleStartOffset > pSample->MaxOffset) {
300 // The offset is applied to the RAM buffer
301 finalSynthesisParameters.dPos = 0;
302 Pos = 0;
303 } else {
304 finalSynthesisParameters.dPos = RgnInfo.SampleStartOffset; // offset where we should start playback of sample
305 Pos = RgnInfo.SampleStartOffset;
306 }
307 }
308
309 void Voice::CalculateFadeOutCoeff(float FadeOutTime, float SampleRate) {
310 SignalRack.CalculateFadeOutCoeff(FadeOutTime, SampleRate);
311 }
312
313 int Voice::CalculatePan(uint8_t pan) {
314 // the value isn't limited to [0, 127] here, as this is done
315 // later in SignalUnit.CalculatePan
316 return pan + RgnInfo.Pan;
317 }
318
319 }} // namespace LinuxSampler::sfz

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