/[svn]/linuxsampler/trunk/src/engines/gig/EngineChannel.cpp
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Contents of /linuxsampler/trunk/src/engines/gig/EngineChannel.cpp

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Revision 1267 - (show annotations) (download)
Tue Aug 7 10:34:07 2007 UTC (16 years, 7 months ago) by iliev
File size: 31706 byte(s)
* A notification event is now sent when altering
  audio output channel on a sampler channel

1 /***************************************************************************
2 * *
3 * LinuxSampler - modular, streaming capable sampler *
4 * *
5 * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6 * Copyright (C) 2005 - 2007 Christian Schoenebeck *
7 * *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
12 * *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
17 * *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the Free Software *
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
21 * MA 02111-1307 USA *
22 ***************************************************************************/
23
24 #include "EngineChannel.h"
25
26 namespace LinuxSampler { namespace gig {
27
28 EngineChannel::EngineChannel() {
29 pMIDIKeyInfo = new midi_key_info_t[128];
30 pEngine = NULL;
31 pInstrument = NULL;
32 pEvents = NULL; // we allocate when we retrieve the right Engine object
33 pEventQueue = new RingBuffer<Event,false>(CONFIG_MAX_EVENTS_PER_FRAGMENT, 0);
34 pActiveKeys = new Pool<uint>(128);
35 for (uint i = 0; i < 128; i++) {
36 pMIDIKeyInfo[i].pActiveVoices = NULL; // we allocate when we retrieve the right Engine object
37 pMIDIKeyInfo[i].KeyPressed = false;
38 pMIDIKeyInfo[i].Active = false;
39 pMIDIKeyInfo[i].ReleaseTrigger = false;
40 pMIDIKeyInfo[i].pEvents = NULL; // we allocate when we retrieve the right Engine object
41 pMIDIKeyInfo[i].VoiceTheftsQueued = 0;
42 pMIDIKeyInfo[i].RoundRobinIndex = 0;
43 }
44 InstrumentIdx = -1;
45 InstrumentStat = -1;
46 pChannelLeft = NULL;
47 pChannelRight = NULL;
48 AudioDeviceChannelLeft = -1;
49 AudioDeviceChannelRight = -1;
50 pMidiInputPort = NULL;
51 midiChannel = midi_chan_all;
52 ResetControllers();
53 SoloMode = false;
54 PortamentoMode = false;
55 PortamentoTime = CONFIG_PORTAMENTO_TIME_DEFAULT;
56 }
57
58 EngineChannel::~EngineChannel() {
59 DisconnectAudioOutputDevice();
60 if (pInstrument) Engine::instruments.HandBack(pInstrument, this);
61 if (pEventQueue) delete pEventQueue;
62 if (pActiveKeys) delete pActiveKeys;
63 if (pMIDIKeyInfo) delete[] pMIDIKeyInfo;
64 RemoveAllFxSends();
65 }
66
67 /**
68 * Implementation of virtual method from abstract EngineChannel interface.
69 * This method will periodically be polled (e.g. by the LSCP server) to
70 * check if some engine channel parameter has changed since the last
71 * StatusChanged() call.
72 *
73 * This method can also be used to mark the engine channel as changed
74 * from outside, e.g. by a MIDI input device. The optional argument
75 * \a nNewStatus can be used for this.
76 *
77 * TODO: This "poll method" is just a lazy solution and might be
78 * replaced in future.
79 * @param bNewStatus - (optional, default: false) sets the new status flag
80 * @returns true if engine channel status has changed since last
81 * StatusChanged() call
82 */
83 bool EngineChannel::StatusChanged(bool bNewStatus) {
84 bool b = bStatusChanged;
85 bStatusChanged = bNewStatus;
86 return b;
87 }
88
89 void EngineChannel::Reset() {
90 if (pEngine) pEngine->DisableAndLock();
91 ResetInternal();
92 ResetControllers();
93 if (pEngine) {
94 pEngine->Enable();
95 pEngine->Reset();
96 }
97 }
98
99 /**
100 * This method is not thread safe!
101 */
102 void EngineChannel::ResetInternal() {
103 CurrentKeyDimension = 0;
104
105 // reset key info
106 for (uint i = 0; i < 128; i++) {
107 if (pMIDIKeyInfo[i].pActiveVoices)
108 pMIDIKeyInfo[i].pActiveVoices->clear();
109 if (pMIDIKeyInfo[i].pEvents)
110 pMIDIKeyInfo[i].pEvents->clear();
111 pMIDIKeyInfo[i].KeyPressed = false;
112 pMIDIKeyInfo[i].Active = false;
113 pMIDIKeyInfo[i].ReleaseTrigger = false;
114 pMIDIKeyInfo[i].itSelf = Pool<uint>::Iterator();
115 pMIDIKeyInfo[i].VoiceTheftsQueued = 0;
116 }
117 SoloKey = -1; // no solo key active yet
118 PortamentoPos = -1.0f; // no portamento active yet
119
120 // reset all key groups
121 std::map<uint,uint*>::iterator iter = ActiveKeyGroups.begin();
122 for (; iter != ActiveKeyGroups.end(); iter++) iter->second = NULL;
123
124 // free all active keys
125 pActiveKeys->clear();
126
127 // delete all input events
128 pEventQueue->init();
129
130 if (pEngine) pEngine->ResetInternal();
131
132 // status of engine channel has changed, so set notify flag
133 bStatusChanged = true;
134 }
135
136 LinuxSampler::Engine* EngineChannel::GetEngine() {
137 return pEngine;
138 }
139
140 /**
141 * More or less a workaround to set the instrument name, index and load
142 * status variable to zero percent immediately, that is without blocking
143 * the calling thread. It might be used in future for other preparations
144 * as well though.
145 *
146 * @param FileName - file name of the Gigasampler instrument file
147 * @param Instrument - index of the instrument in the .gig file
148 * @see LoadInstrument()
149 */
150 void EngineChannel::PrepareLoadInstrument(const char* FileName, uint Instrument) {
151 InstrumentFile = FileName;
152 InstrumentIdx = Instrument;
153 InstrumentStat = 0;
154 }
155
156 /**
157 * Load an instrument from a .gig file. PrepareLoadInstrument() has to
158 * be called first to provide the information which instrument to load.
159 * This method will then actually start to load the instrument and block
160 * the calling thread until loading was completed.
161 *
162 * @see PrepareLoadInstrument()
163 */
164 void EngineChannel::LoadInstrument() {
165 ::gig::Instrument* oldInstrument = pInstrument;
166
167 // free old instrument
168 if (oldInstrument) {
169 if (pEngine) {
170 // make sure we don't trigger any new notes with the
171 // old instrument
172 ::gig::DimensionRegion** dimRegionsInUse = pEngine->ChangeInstrument(this, 0);
173
174 // give old instrument back to instrument manager, but
175 // keep the dimension regions and samples that are in
176 // use
177 Engine::instruments.HandBackInstrument(oldInstrument, this, dimRegionsInUse);
178 } else {
179 Engine::instruments.HandBack(oldInstrument, this);
180 }
181 }
182
183 // delete all key groups
184 ActiveKeyGroups.clear();
185
186 // request gig instrument from instrument manager
187 ::gig::Instrument* newInstrument;
188 try {
189 InstrumentManager::instrument_id_t instrid;
190 instrid.FileName = InstrumentFile;
191 instrid.Index = InstrumentIdx;
192 newInstrument = Engine::instruments.Borrow(instrid, this);
193 if (!newInstrument) {
194 throw InstrumentManagerException("resource was not created");
195 }
196 }
197 catch (RIFF::Exception e) {
198 InstrumentStat = -2;
199 String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message;
200 throw Exception(msg);
201 }
202 catch (InstrumentManagerException e) {
203 InstrumentStat = -3;
204 String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message();
205 throw Exception(msg);
206 }
207 catch (...) {
208 InstrumentStat = -4;
209 throw Exception("gig::Engine error: Failed to load instrument, cause: Unknown exception while trying to parse gig file.");
210 }
211
212 // rebuild ActiveKeyGroups map with key groups of current instrument
213 for (::gig::Region* pRegion = newInstrument->GetFirstRegion(); pRegion; pRegion = newInstrument->GetNextRegion())
214 if (pRegion->KeyGroup) ActiveKeyGroups[pRegion->KeyGroup] = NULL;
215
216 InstrumentIdxName = newInstrument->pInfo->Name;
217 InstrumentStat = 100;
218
219 if (pEngine) pEngine->ChangeInstrument(this, newInstrument);
220 else pInstrument = newInstrument;
221 }
222
223 /**
224 * Will be called by the InstrumentResourceManager when the instrument
225 * we are currently using on this EngineChannel is going to be updated,
226 * so we can stop playback before that happens.
227 */
228 void EngineChannel::ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg) {
229 dmsg(3,("gig::Engine: Received instrument update message.\n"));
230 if (pEngine) pEngine->DisableAndLock();
231 ResetInternal();
232 this->pInstrument = NULL;
233 }
234
235 /**
236 * Will be called by the InstrumentResourceManager when the instrument
237 * update process was completed, so we can continue with playback.
238 */
239 void EngineChannel::ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg) {
240 this->pInstrument = pNewResource; //TODO: there are couple of engine parameters we should update here as well if the instrument was updated (see LoadInstrument())
241 if (pEngine) pEngine->Enable();
242 bStatusChanged = true; // status of engine has changed, so set notify flag
243 }
244
245 /**
246 * Will be called by the InstrumentResourceManager on progress changes
247 * while loading or realoading an instrument for this EngineChannel.
248 *
249 * @param fProgress - current progress as value between 0.0 and 1.0
250 */
251 void EngineChannel::OnResourceProgress(float fProgress) {
252 this->InstrumentStat = int(fProgress * 100.0f);
253 dmsg(7,("gig::EngineChannel: progress %d%", InstrumentStat));
254 bStatusChanged = true; // status of engine has changed, so set notify flag
255 }
256
257 void EngineChannel::Connect(AudioOutputDevice* pAudioOut) {
258 if (pEngine) {
259 if (pEngine->pAudioOutputDevice == pAudioOut) return;
260 DisconnectAudioOutputDevice();
261 }
262 pEngine = Engine::AcquireEngine(this, pAudioOut);
263 ResetInternal();
264 pEvents = new RTList<Event>(pEngine->pEventPool);
265 for (uint i = 0; i < 128; i++) {
266 pMIDIKeyInfo[i].pActiveVoices = new RTList<Voice>(pEngine->pVoicePool);
267 pMIDIKeyInfo[i].pEvents = new RTList<Event>(pEngine->pEventPool);
268 }
269 AudioDeviceChannelLeft = 0;
270 AudioDeviceChannelRight = 1;
271 if (fxSends.empty()) { // render directly into the AudioDevice's output buffers
272 pChannelLeft = pAudioOut->Channel(AudioDeviceChannelLeft);
273 pChannelRight = pAudioOut->Channel(AudioDeviceChannelRight);
274 } else { // use local buffers for rendering and copy later
275 // ensure the local buffers have the correct size
276 if (pChannelLeft) delete pChannelLeft;
277 if (pChannelRight) delete pChannelRight;
278 pChannelLeft = new AudioChannel(0, pAudioOut->MaxSamplesPerCycle());
279 pChannelRight = new AudioChannel(1, pAudioOut->MaxSamplesPerCycle());
280 }
281 if (pEngine->EngineDisabled.GetUnsafe()) pEngine->Enable();
282 MidiInputPort::AddSysexListener(pEngine);
283 }
284
285 void EngineChannel::DisconnectAudioOutputDevice() {
286 if (pEngine) { // if clause to prevent disconnect loops
287 ResetInternal();
288 if (pEvents) {
289 delete pEvents;
290 pEvents = NULL;
291 }
292 for (uint i = 0; i < 128; i++) {
293 if (pMIDIKeyInfo[i].pActiveVoices) {
294 delete pMIDIKeyInfo[i].pActiveVoices;
295 pMIDIKeyInfo[i].pActiveVoices = NULL;
296 }
297 if (pMIDIKeyInfo[i].pEvents) {
298 delete pMIDIKeyInfo[i].pEvents;
299 pMIDIKeyInfo[i].pEvents = NULL;
300 }
301 }
302 Engine* oldEngine = pEngine;
303 AudioOutputDevice* oldAudioDevice = pEngine->pAudioOutputDevice;
304 pEngine = NULL;
305 Engine::FreeEngine(this, oldAudioDevice);
306 AudioDeviceChannelLeft = -1;
307 AudioDeviceChannelRight = -1;
308 if (!fxSends.empty()) { // free the local rendering buffers
309 if (pChannelLeft) delete pChannelLeft;
310 if (pChannelRight) delete pChannelRight;
311 }
312 pChannelLeft = NULL;
313 pChannelRight = NULL;
314 }
315 }
316
317 AudioOutputDevice* EngineChannel::GetAudioOutputDevice() {
318 return (pEngine) ? pEngine->pAudioOutputDevice : NULL;
319 }
320
321 void EngineChannel::SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel) {
322 if (!pEngine || !pEngine->pAudioOutputDevice) throw AudioOutputException("No audio output device connected yet.");
323
324 AudioChannel* pChannel = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannel);
325 if (!pChannel) throw AudioOutputException("Invalid audio output device channel " + ToString(AudioDeviceChannel));
326 switch (EngineAudioChannel) {
327 case 0: // left output channel
328 if (fxSends.empty()) pChannelLeft = pChannel;
329 AudioDeviceChannelLeft = AudioDeviceChannel;
330 break;
331 case 1: // right output channel
332 if (fxSends.empty()) pChannelRight = pChannel;
333 AudioDeviceChannelRight = AudioDeviceChannel;
334 break;
335 default:
336 throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));
337 }
338
339 bStatusChanged = true;
340 }
341
342 int EngineChannel::OutputChannel(uint EngineAudioChannel) {
343 switch (EngineAudioChannel) {
344 case 0: // left channel
345 return AudioDeviceChannelLeft;
346 case 1: // right channel
347 return AudioDeviceChannelRight;
348 default:
349 throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));
350 }
351 }
352
353 void EngineChannel::Connect(MidiInputPort* pMidiPort, midi_chan_t MidiChannel) {
354 if (!pMidiPort || pMidiPort == this->pMidiInputPort) return;
355 DisconnectMidiInputPort();
356 this->pMidiInputPort = pMidiPort;
357 this->midiChannel = MidiChannel;
358 pMidiPort->Connect(this, MidiChannel);
359 }
360
361 void EngineChannel::DisconnectMidiInputPort() {
362 MidiInputPort* pOldPort = this->pMidiInputPort;
363 this->pMidiInputPort = NULL;
364 if (pOldPort) pOldPort->Disconnect(this);
365 }
366
367 MidiInputPort* EngineChannel::GetMidiInputPort() {
368 return pMidiInputPort;
369 }
370
371 midi_chan_t EngineChannel::MidiChannel() {
372 return midiChannel;
373 }
374
375 FxSend* EngineChannel::AddFxSend(uint8_t MidiCtrl, String Name) throw (Exception) {
376 if (pEngine) pEngine->DisableAndLock();
377 FxSend* pFxSend = new FxSend(this, MidiCtrl, Name);
378 if (fxSends.empty()) {
379 if (pEngine && pEngine->pAudioOutputDevice) {
380 AudioOutputDevice* pDevice = pEngine->pAudioOutputDevice;
381 // create local render buffers
382 pChannelLeft = new AudioChannel(0, pDevice->MaxSamplesPerCycle());
383 pChannelRight = new AudioChannel(1, pDevice->MaxSamplesPerCycle());
384 } else {
385 // postpone local render buffer creation until audio device is assigned
386 pChannelLeft = NULL;
387 pChannelRight = NULL;
388 }
389 }
390 fxSends.push_back(pFxSend);
391 if (pEngine) pEngine->Enable();
392 fireFxSendCountChanged(iSamplerChannelIndex, GetFxSendCount());
393
394 return pFxSend;
395 }
396
397 FxSend* EngineChannel::GetFxSend(uint FxSendIndex) {
398 return (FxSendIndex < fxSends.size()) ? fxSends[FxSendIndex] : NULL;
399 }
400
401 uint EngineChannel::GetFxSendCount() {
402 return fxSends.size();
403 }
404
405 void EngineChannel::RemoveFxSend(FxSend* pFxSend) {
406 if (pEngine) pEngine->DisableAndLock();
407 for (
408 std::vector<FxSend*>::iterator iter = fxSends.begin();
409 iter != fxSends.end(); iter++
410 ) {
411 if (*iter == pFxSend) {
412 delete pFxSend;
413 fxSends.erase(iter);
414 if (fxSends.empty()) {
415 // destroy local render buffers
416 if (pChannelLeft) delete pChannelLeft;
417 if (pChannelRight) delete pChannelRight;
418 // fallback to render directly into AudioOutputDevice's buffers
419 if (pEngine && pEngine->pAudioOutputDevice) {
420 pChannelLeft = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannelLeft);
421 pChannelRight = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannelRight);
422 } else { // we update the pointers later
423 pChannelLeft = NULL;
424 pChannelRight = NULL;
425 }
426 }
427 break;
428 }
429 }
430 if (pEngine) pEngine->Enable();
431 fireFxSendCountChanged(iSamplerChannelIndex, GetFxSendCount());
432 }
433
434 /**
435 * Will be called by the MIDIIn Thread to let the audio thread trigger a new
436 * voice for the given key. This method is meant for real time rendering,
437 * that is an event will immediately be created with the current system
438 * time as time stamp.
439 *
440 * @param Key - MIDI key number of the triggered key
441 * @param Velocity - MIDI velocity value of the triggered key
442 */
443 void EngineChannel::SendNoteOn(uint8_t Key, uint8_t Velocity) {
444 if (pEngine) {
445 Event event = pEngine->pEventGenerator->CreateEvent();
446 event.Type = Event::type_note_on;
447 event.Param.Note.Key = Key;
448 event.Param.Note.Velocity = Velocity;
449 event.pEngineChannel = this;
450 if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
451 else dmsg(1,("EngineChannel: Input event queue full!"));
452 }
453 }
454
455 /**
456 * Will be called by the MIDIIn Thread to let the audio thread trigger a new
457 * voice for the given key. This method is meant for offline rendering
458 * and / or for cases where the exact position of the event in the current
459 * audio fragment is already known.
460 *
461 * @param Key - MIDI key number of the triggered key
462 * @param Velocity - MIDI velocity value of the triggered key
463 * @param FragmentPos - sample point position in the current audio
464 * fragment to which this event belongs to
465 */
466 void EngineChannel::SendNoteOn(uint8_t Key, uint8_t Velocity, int32_t FragmentPos) {
467 if (FragmentPos < 0) {
468 dmsg(1,("EngineChannel::SendNoteOn(): negative FragmentPos! Seems MIDI driver is buggy!"));
469 }
470 else if (pEngine) {
471 Event event = pEngine->pEventGenerator->CreateEvent(FragmentPos);
472 event.Type = Event::type_note_on;
473 event.Param.Note.Key = Key;
474 event.Param.Note.Velocity = Velocity;
475 event.pEngineChannel = this;
476 if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
477 else dmsg(1,("EngineChannel: Input event queue full!"));
478 }
479 }
480
481 /**
482 * Will be called by the MIDIIn Thread to signal the audio thread to release
483 * voice(s) on the given key. This method is meant for real time rendering,
484 * that is an event will immediately be created with the current system
485 * time as time stamp.
486 *
487 * @param Key - MIDI key number of the released key
488 * @param Velocity - MIDI release velocity value of the released key
489 */
490 void EngineChannel::SendNoteOff(uint8_t Key, uint8_t Velocity) {
491 if (pEngine) {
492 Event event = pEngine->pEventGenerator->CreateEvent();
493 event.Type = Event::type_note_off;
494 event.Param.Note.Key = Key;
495 event.Param.Note.Velocity = Velocity;
496 event.pEngineChannel = this;
497 if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
498 else dmsg(1,("EngineChannel: Input event queue full!"));
499 }
500 }
501
502 /**
503 * Will be called by the MIDIIn Thread to signal the audio thread to release
504 * voice(s) on the given key. This method is meant for offline rendering
505 * and / or for cases where the exact position of the event in the current
506 * audio fragment is already known.
507 *
508 * @param Key - MIDI key number of the released key
509 * @param Velocity - MIDI release velocity value of the released key
510 * @param FragmentPos - sample point position in the current audio
511 * fragment to which this event belongs to
512 */
513 void EngineChannel::SendNoteOff(uint8_t Key, uint8_t Velocity, int32_t FragmentPos) {
514 if (FragmentPos < 0) {
515 dmsg(1,("EngineChannel::SendNoteOff(): negative FragmentPos! Seems MIDI driver is buggy!"));
516 }
517 else if (pEngine) {
518 Event event = pEngine->pEventGenerator->CreateEvent(FragmentPos);
519 event.Type = Event::type_note_off;
520 event.Param.Note.Key = Key;
521 event.Param.Note.Velocity = Velocity;
522 event.pEngineChannel = this;
523 if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
524 else dmsg(1,("EngineChannel: Input event queue full!"));
525 }
526 }
527
528 /**
529 * Will be called by the MIDIIn Thread to signal the audio thread to change
530 * the pitch value for all voices. This method is meant for real time
531 * rendering, that is an event will immediately be created with the
532 * current system time as time stamp.
533 *
534 * @param Pitch - MIDI pitch value (-8192 ... +8191)
535 */
536 void EngineChannel::SendPitchbend(int Pitch) {
537 if (pEngine) {
538 Event event = pEngine->pEventGenerator->CreateEvent();
539 event.Type = Event::type_pitchbend;
540 event.Param.Pitch.Pitch = Pitch;
541 event.pEngineChannel = this;
542 if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
543 else dmsg(1,("EngineChannel: Input event queue full!"));
544 }
545 }
546
547 /**
548 * Will be called by the MIDIIn Thread to signal the audio thread to change
549 * the pitch value for all voices. This method is meant for offline
550 * rendering and / or for cases where the exact position of the event in
551 * the current audio fragment is already known.
552 *
553 * @param Pitch - MIDI pitch value (-8192 ... +8191)
554 * @param FragmentPos - sample point position in the current audio
555 * fragment to which this event belongs to
556 */
557 void EngineChannel::SendPitchbend(int Pitch, int32_t FragmentPos) {
558 if (FragmentPos < 0) {
559 dmsg(1,("EngineChannel::SendPitchBend(): negative FragmentPos! Seems MIDI driver is buggy!"));
560 }
561 else if (pEngine) {
562 Event event = pEngine->pEventGenerator->CreateEvent(FragmentPos);
563 event.Type = Event::type_pitchbend;
564 event.Param.Pitch.Pitch = Pitch;
565 event.pEngineChannel = this;
566 if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
567 else dmsg(1,("EngineChannel: Input event queue full!"));
568 }
569 }
570
571 /**
572 * Will be called by the MIDIIn Thread to signal the audio thread that a
573 * continuous controller value has changed. This method is meant for real
574 * time rendering, that is an event will immediately be created with the
575 * current system time as time stamp.
576 *
577 * @param Controller - MIDI controller number of the occured control change
578 * @param Value - value of the control change
579 */
580 void EngineChannel::SendControlChange(uint8_t Controller, uint8_t Value) {
581 if (pEngine) {
582 Event event = pEngine->pEventGenerator->CreateEvent();
583 event.Type = Event::type_control_change;
584 event.Param.CC.Controller = Controller;
585 event.Param.CC.Value = Value;
586 event.pEngineChannel = this;
587 if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
588 else dmsg(1,("EngineChannel: Input event queue full!"));
589 }
590 }
591
592 /**
593 * Will be called by the MIDIIn Thread to signal the audio thread that a
594 * continuous controller value has changed. This method is meant for
595 * offline rendering and / or for cases where the exact position of the
596 * event in the current audio fragment is already known.
597 *
598 * @param Controller - MIDI controller number of the occured control change
599 * @param Value - value of the control change
600 * @param FragmentPos - sample point position in the current audio
601 * fragment to which this event belongs to
602 */
603 void EngineChannel::SendControlChange(uint8_t Controller, uint8_t Value, int32_t FragmentPos) {
604 if (FragmentPos < 0) {
605 dmsg(1,("EngineChannel::SendControlChange(): negative FragmentPos! Seems MIDI driver is buggy!"));
606 }
607 else if (pEngine) {
608 Event event = pEngine->pEventGenerator->CreateEvent(FragmentPos);
609 event.Type = Event::type_control_change;
610 event.Param.CC.Controller = Controller;
611 event.Param.CC.Value = Value;
612 event.pEngineChannel = this;
613 if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
614 else dmsg(1,("EngineChannel: Input event queue full!"));
615 }
616 }
617
618 void EngineChannel::ClearEventLists() {
619 pEvents->clear();
620 // empty MIDI key specific event lists
621 {
622 RTList<uint>::Iterator iuiKey = pActiveKeys->first();
623 RTList<uint>::Iterator end = pActiveKeys->end();
624 for(; iuiKey != end; ++iuiKey) {
625 pMIDIKeyInfo[*iuiKey].pEvents->clear(); // free all events on the key
626 }
627 }
628 }
629
630 void EngineChannel::ResetControllers() {
631 Pitch = 0;
632 SustainPedal = false;
633 SostenutoPedal = false;
634 GlobalVolume = 1.0f;
635 MidiVolume = 1.0;
636 GlobalPanLeft = 1.0f;
637 GlobalPanRight = 1.0f;
638 GlobalTranspose = 0;
639 // set all MIDI controller values to zero
640 memset(ControllerTable, 0x00, 129);
641 // reset all FX Send levels
642 for (
643 std::vector<FxSend*>::iterator iter = fxSends.begin();
644 iter != fxSends.end(); iter++
645 ) {
646 (*iter)->Reset();
647 }
648 }
649
650 /**
651 * Copy all events from the engine channel's input event queue buffer to
652 * the internal event list. This will be done at the beginning of each
653 * audio cycle (that is each RenderAudio() call) to distinguish all
654 * events which have to be processed in the current audio cycle. Each
655 * EngineChannel has it's own input event queue for the common channel
656 * specific events (like NoteOn, NoteOff and ControlChange events).
657 * Beside that, the engine also has a input event queue for global
658 * events (usually SysEx messages).
659 *
660 * @param Samples - number of sample points to be processed in the
661 * current audio cycle
662 */
663 void EngineChannel::ImportEvents(uint Samples) {
664 RingBuffer<Event,false>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader();
665 Event* pEvent;
666 while (true) {
667 // get next event from input event queue
668 if (!(pEvent = eventQueueReader.pop())) break;
669 // if younger event reached, ignore that and all subsequent ones for now
670 if (pEvent->FragmentPos() >= Samples) {
671 eventQueueReader--;
672 dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples));
673 pEvent->ResetFragmentPos();
674 break;
675 }
676 // copy event to internal event list
677 if (pEvents->poolIsEmpty()) {
678 dmsg(1,("Event pool emtpy!\n"));
679 break;
680 }
681 *pEvents->allocAppend() = *pEvent;
682 }
683 eventQueueReader.free(); // free all copied events from input queue
684 }
685
686 void EngineChannel::RemoveAllFxSends() {
687 if (pEngine) pEngine->DisableAndLock();
688 if (!fxSends.empty()) { // free local render buffers
689 if (pChannelLeft) {
690 delete pChannelLeft;
691 if (pEngine && pEngine->pAudioOutputDevice) {
692 // fallback to render directly to the AudioOutputDevice's buffer
693 pChannelLeft = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannelLeft);
694 } else pChannelLeft = NULL;
695 }
696 if (pChannelRight) {
697 delete pChannelRight;
698 if (pEngine && pEngine->pAudioOutputDevice) {
699 // fallback to render directly to the AudioOutputDevice's buffer
700 pChannelRight = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannelRight);
701 } else pChannelRight = NULL;
702 }
703 }
704 for (int i = 0; i < fxSends.size(); i++) delete fxSends[i];
705 fxSends.clear();
706 if (pEngine) pEngine->Enable();
707 }
708
709 float EngineChannel::Volume() {
710 return GlobalVolume;
711 }
712
713 void EngineChannel::Volume(float f) {
714 GlobalVolume = f;
715 bStatusChanged = true; // status of engine channel has changed, so set notify flag
716 }
717
718 uint EngineChannel::Channels() {
719 return 2;
720 }
721
722 String EngineChannel::InstrumentFileName() {
723 return InstrumentFile;
724 }
725
726 String EngineChannel::InstrumentName() {
727 return InstrumentIdxName;
728 }
729
730 int EngineChannel::InstrumentIndex() {
731 return InstrumentIdx;
732 }
733
734 int EngineChannel::InstrumentStatus() {
735 return InstrumentStat;
736 }
737
738 String EngineChannel::EngineName() {
739 return LS_GIG_ENGINE_NAME;
740 }
741
742 }} // namespace LinuxSampler::gig

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