/[svn]/linuxsampler/trunk/src/engines/gig/EngineChannel.cpp
ViewVC logotype

Contents of /linuxsampler/trunk/src/engines/gig/EngineChannel.cpp

Parent Directory Parent Directory | Revision Log Revision Log


Revision 1298 - (show annotations) (download)
Fri Aug 17 12:55:37 2007 UTC (12 years, 6 months ago) by iliev
File size: 31744 byte(s)
* ensure that a notification event is sent when already
  loaded instrument is assigned to another 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 StatusChanged(true);
223 }
224
225 /**
226 * Will be called by the InstrumentResourceManager when the instrument
227 * we are currently using on this EngineChannel is going to be updated,
228 * so we can stop playback before that happens.
229 */
230 void EngineChannel::ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg) {
231 dmsg(3,("gig::Engine: Received instrument update message.\n"));
232 if (pEngine) pEngine->DisableAndLock();
233 ResetInternal();
234 this->pInstrument = NULL;
235 }
236
237 /**
238 * Will be called by the InstrumentResourceManager when the instrument
239 * update process was completed, so we can continue with playback.
240 */
241 void EngineChannel::ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg) {
242 this->pInstrument = pNewResource; //TODO: there are couple of engine parameters we should update here as well if the instrument was updated (see LoadInstrument())
243 if (pEngine) pEngine->Enable();
244 bStatusChanged = true; // status of engine has changed, so set notify flag
245 }
246
247 /**
248 * Will be called by the InstrumentResourceManager on progress changes
249 * while loading or realoading an instrument for this EngineChannel.
250 *
251 * @param fProgress - current progress as value between 0.0 and 1.0
252 */
253 void EngineChannel::OnResourceProgress(float fProgress) {
254 this->InstrumentStat = int(fProgress * 100.0f);
255 dmsg(7,("gig::EngineChannel: progress %d%", InstrumentStat));
256 bStatusChanged = true; // status of engine has changed, so set notify flag
257 }
258
259 void EngineChannel::Connect(AudioOutputDevice* pAudioOut) {
260 if (pEngine) {
261 if (pEngine->pAudioOutputDevice == pAudioOut) return;
262 DisconnectAudioOutputDevice();
263 }
264 pEngine = Engine::AcquireEngine(this, pAudioOut);
265 ResetInternal();
266 pEvents = new RTList<Event>(pEngine->pEventPool);
267 for (uint i = 0; i < 128; i++) {
268 pMIDIKeyInfo[i].pActiveVoices = new RTList<Voice>(pEngine->pVoicePool);
269 pMIDIKeyInfo[i].pEvents = new RTList<Event>(pEngine->pEventPool);
270 }
271 AudioDeviceChannelLeft = 0;
272 AudioDeviceChannelRight = 1;
273 if (fxSends.empty()) { // render directly into the AudioDevice's output buffers
274 pChannelLeft = pAudioOut->Channel(AudioDeviceChannelLeft);
275 pChannelRight = pAudioOut->Channel(AudioDeviceChannelRight);
276 } else { // use local buffers for rendering and copy later
277 // ensure the local buffers have the correct size
278 if (pChannelLeft) delete pChannelLeft;
279 if (pChannelRight) delete pChannelRight;
280 pChannelLeft = new AudioChannel(0, pAudioOut->MaxSamplesPerCycle());
281 pChannelRight = new AudioChannel(1, pAudioOut->MaxSamplesPerCycle());
282 }
283 if (pEngine->EngineDisabled.GetUnsafe()) pEngine->Enable();
284 MidiInputPort::AddSysexListener(pEngine);
285 }
286
287 void EngineChannel::DisconnectAudioOutputDevice() {
288 if (pEngine) { // if clause to prevent disconnect loops
289 ResetInternal();
290 if (pEvents) {
291 delete pEvents;
292 pEvents = NULL;
293 }
294 for (uint i = 0; i < 128; i++) {
295 if (pMIDIKeyInfo[i].pActiveVoices) {
296 delete pMIDIKeyInfo[i].pActiveVoices;
297 pMIDIKeyInfo[i].pActiveVoices = NULL;
298 }
299 if (pMIDIKeyInfo[i].pEvents) {
300 delete pMIDIKeyInfo[i].pEvents;
301 pMIDIKeyInfo[i].pEvents = NULL;
302 }
303 }
304 Engine* oldEngine = pEngine;
305 AudioOutputDevice* oldAudioDevice = pEngine->pAudioOutputDevice;
306 pEngine = NULL;
307 Engine::FreeEngine(this, oldAudioDevice);
308 AudioDeviceChannelLeft = -1;
309 AudioDeviceChannelRight = -1;
310 if (!fxSends.empty()) { // free the local rendering buffers
311 if (pChannelLeft) delete pChannelLeft;
312 if (pChannelRight) delete pChannelRight;
313 }
314 pChannelLeft = NULL;
315 pChannelRight = NULL;
316 }
317 }
318
319 AudioOutputDevice* EngineChannel::GetAudioOutputDevice() {
320 return (pEngine) ? pEngine->pAudioOutputDevice : NULL;
321 }
322
323 void EngineChannel::SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel) {
324 if (!pEngine || !pEngine->pAudioOutputDevice) throw AudioOutputException("No audio output device connected yet.");
325
326 AudioChannel* pChannel = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannel);
327 if (!pChannel) throw AudioOutputException("Invalid audio output device channel " + ToString(AudioDeviceChannel));
328 switch (EngineAudioChannel) {
329 case 0: // left output channel
330 if (fxSends.empty()) pChannelLeft = pChannel;
331 AudioDeviceChannelLeft = AudioDeviceChannel;
332 break;
333 case 1: // right output channel
334 if (fxSends.empty()) pChannelRight = pChannel;
335 AudioDeviceChannelRight = AudioDeviceChannel;
336 break;
337 default:
338 throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));
339 }
340
341 bStatusChanged = true;
342 }
343
344 int EngineChannel::OutputChannel(uint EngineAudioChannel) {
345 switch (EngineAudioChannel) {
346 case 0: // left channel
347 return AudioDeviceChannelLeft;
348 case 1: // right channel
349 return AudioDeviceChannelRight;
350 default:
351 throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));
352 }
353 }
354
355 void EngineChannel::Connect(MidiInputPort* pMidiPort, midi_chan_t MidiChannel) {
356 if (!pMidiPort || pMidiPort == this->pMidiInputPort) return;
357 DisconnectMidiInputPort();
358 this->pMidiInputPort = pMidiPort;
359 this->midiChannel = MidiChannel;
360 pMidiPort->Connect(this, MidiChannel);
361 }
362
363 void EngineChannel::DisconnectMidiInputPort() {
364 MidiInputPort* pOldPort = this->pMidiInputPort;
365 this->pMidiInputPort = NULL;
366 if (pOldPort) pOldPort->Disconnect(this);
367 }
368
369 MidiInputPort* EngineChannel::GetMidiInputPort() {
370 return pMidiInputPort;
371 }
372
373 midi_chan_t EngineChannel::MidiChannel() {
374 return midiChannel;
375 }
376
377 FxSend* EngineChannel::AddFxSend(uint8_t MidiCtrl, String Name) throw (Exception) {
378 if (pEngine) pEngine->DisableAndLock();
379 FxSend* pFxSend = new FxSend(this, MidiCtrl, Name);
380 if (fxSends.empty()) {
381 if (pEngine && pEngine->pAudioOutputDevice) {
382 AudioOutputDevice* pDevice = pEngine->pAudioOutputDevice;
383 // create local render buffers
384 pChannelLeft = new AudioChannel(0, pDevice->MaxSamplesPerCycle());
385 pChannelRight = new AudioChannel(1, pDevice->MaxSamplesPerCycle());
386 } else {
387 // postpone local render buffer creation until audio device is assigned
388 pChannelLeft = NULL;
389 pChannelRight = NULL;
390 }
391 }
392 fxSends.push_back(pFxSend);
393 if (pEngine) pEngine->Enable();
394 fireFxSendCountChanged(iSamplerChannelIndex, GetFxSendCount());
395
396 return pFxSend;
397 }
398
399 FxSend* EngineChannel::GetFxSend(uint FxSendIndex) {
400 return (FxSendIndex < fxSends.size()) ? fxSends[FxSendIndex] : NULL;
401 }
402
403 uint EngineChannel::GetFxSendCount() {
404 return fxSends.size();
405 }
406
407 void EngineChannel::RemoveFxSend(FxSend* pFxSend) {
408 if (pEngine) pEngine->DisableAndLock();
409 for (
410 std::vector<FxSend*>::iterator iter = fxSends.begin();
411 iter != fxSends.end(); iter++
412 ) {
413 if (*iter == pFxSend) {
414 delete pFxSend;
415 fxSends.erase(iter);
416 if (fxSends.empty()) {
417 // destroy local render buffers
418 if (pChannelLeft) delete pChannelLeft;
419 if (pChannelRight) delete pChannelRight;
420 // fallback to render directly into AudioOutputDevice's buffers
421 if (pEngine && pEngine->pAudioOutputDevice) {
422 pChannelLeft = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannelLeft);
423 pChannelRight = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannelRight);
424 } else { // we update the pointers later
425 pChannelLeft = NULL;
426 pChannelRight = NULL;
427 }
428 }
429 break;
430 }
431 }
432 if (pEngine) pEngine->Enable();
433 fireFxSendCountChanged(iSamplerChannelIndex, GetFxSendCount());
434 }
435
436 /**
437 * Will be called by the MIDIIn Thread to let the audio thread trigger a new
438 * voice for the given key. This method is meant for real time rendering,
439 * that is an event will immediately be created with the current system
440 * time as time stamp.
441 *
442 * @param Key - MIDI key number of the triggered key
443 * @param Velocity - MIDI velocity value of the triggered key
444 */
445 void EngineChannel::SendNoteOn(uint8_t Key, uint8_t Velocity) {
446 if (pEngine) {
447 Event event = pEngine->pEventGenerator->CreateEvent();
448 event.Type = Event::type_note_on;
449 event.Param.Note.Key = Key;
450 event.Param.Note.Velocity = Velocity;
451 event.pEngineChannel = this;
452 if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
453 else dmsg(1,("EngineChannel: Input event queue full!"));
454 }
455 }
456
457 /**
458 * Will be called by the MIDIIn Thread to let the audio thread trigger a new
459 * voice for the given key. This method is meant for offline rendering
460 * and / or for cases where the exact position of the event in the current
461 * audio fragment is already known.
462 *
463 * @param Key - MIDI key number of the triggered key
464 * @param Velocity - MIDI velocity value of the triggered key
465 * @param FragmentPos - sample point position in the current audio
466 * fragment to which this event belongs to
467 */
468 void EngineChannel::SendNoteOn(uint8_t Key, uint8_t Velocity, int32_t FragmentPos) {
469 if (FragmentPos < 0) {
470 dmsg(1,("EngineChannel::SendNoteOn(): negative FragmentPos! Seems MIDI driver is buggy!"));
471 }
472 else if (pEngine) {
473 Event event = pEngine->pEventGenerator->CreateEvent(FragmentPos);
474 event.Type = Event::type_note_on;
475 event.Param.Note.Key = Key;
476 event.Param.Note.Velocity = Velocity;
477 event.pEngineChannel = this;
478 if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
479 else dmsg(1,("EngineChannel: Input event queue full!"));
480 }
481 }
482
483 /**
484 * Will be called by the MIDIIn Thread to signal the audio thread to release
485 * voice(s) on the given key. This method is meant for real time rendering,
486 * that is an event will immediately be created with the current system
487 * time as time stamp.
488 *
489 * @param Key - MIDI key number of the released key
490 * @param Velocity - MIDI release velocity value of the released key
491 */
492 void EngineChannel::SendNoteOff(uint8_t Key, uint8_t Velocity) {
493 if (pEngine) {
494 Event event = pEngine->pEventGenerator->CreateEvent();
495 event.Type = Event::type_note_off;
496 event.Param.Note.Key = Key;
497 event.Param.Note.Velocity = Velocity;
498 event.pEngineChannel = this;
499 if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
500 else dmsg(1,("EngineChannel: Input event queue full!"));
501 }
502 }
503
504 /**
505 * Will be called by the MIDIIn Thread to signal the audio thread to release
506 * voice(s) on the given key. This method is meant for offline rendering
507 * and / or for cases where the exact position of the event in the current
508 * audio fragment is already known.
509 *
510 * @param Key - MIDI key number of the released key
511 * @param Velocity - MIDI release velocity value of the released key
512 * @param FragmentPos - sample point position in the current audio
513 * fragment to which this event belongs to
514 */
515 void EngineChannel::SendNoteOff(uint8_t Key, uint8_t Velocity, int32_t FragmentPos) {
516 if (FragmentPos < 0) {
517 dmsg(1,("EngineChannel::SendNoteOff(): negative FragmentPos! Seems MIDI driver is buggy!"));
518 }
519 else if (pEngine) {
520 Event event = pEngine->pEventGenerator->CreateEvent(FragmentPos);
521 event.Type = Event::type_note_off;
522 event.Param.Note.Key = Key;
523 event.Param.Note.Velocity = Velocity;
524 event.pEngineChannel = this;
525 if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
526 else dmsg(1,("EngineChannel: Input event queue full!"));
527 }
528 }
529
530 /**
531 * Will be called by the MIDIIn Thread to signal the audio thread to change
532 * the pitch value for all voices. This method is meant for real time
533 * rendering, that is an event will immediately be created with the
534 * current system time as time stamp.
535 *
536 * @param Pitch - MIDI pitch value (-8192 ... +8191)
537 */
538 void EngineChannel::SendPitchbend(int Pitch) {
539 if (pEngine) {
540 Event event = pEngine->pEventGenerator->CreateEvent();
541 event.Type = Event::type_pitchbend;
542 event.Param.Pitch.Pitch = Pitch;
543 event.pEngineChannel = this;
544 if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
545 else dmsg(1,("EngineChannel: Input event queue full!"));
546 }
547 }
548
549 /**
550 * Will be called by the MIDIIn Thread to signal the audio thread to change
551 * the pitch value for all voices. This method is meant for offline
552 * rendering and / or for cases where the exact position of the event in
553 * the current audio fragment is already known.
554 *
555 * @param Pitch - MIDI pitch value (-8192 ... +8191)
556 * @param FragmentPos - sample point position in the current audio
557 * fragment to which this event belongs to
558 */
559 void EngineChannel::SendPitchbend(int Pitch, int32_t FragmentPos) {
560 if (FragmentPos < 0) {
561 dmsg(1,("EngineChannel::SendPitchBend(): negative FragmentPos! Seems MIDI driver is buggy!"));
562 }
563 else if (pEngine) {
564 Event event = pEngine->pEventGenerator->CreateEvent(FragmentPos);
565 event.Type = Event::type_pitchbend;
566 event.Param.Pitch.Pitch = Pitch;
567 event.pEngineChannel = this;
568 if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
569 else dmsg(1,("EngineChannel: Input event queue full!"));
570 }
571 }
572
573 /**
574 * Will be called by the MIDIIn Thread to signal the audio thread that a
575 * continuous controller value has changed. This method is meant for real
576 * time rendering, that is an event will immediately be created with the
577 * current system time as time stamp.
578 *
579 * @param Controller - MIDI controller number of the occured control change
580 * @param Value - value of the control change
581 */
582 void EngineChannel::SendControlChange(uint8_t Controller, uint8_t Value) {
583 if (pEngine) {
584 Event event = pEngine->pEventGenerator->CreateEvent();
585 event.Type = Event::type_control_change;
586 event.Param.CC.Controller = Controller;
587 event.Param.CC.Value = Value;
588 event.pEngineChannel = this;
589 if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
590 else dmsg(1,("EngineChannel: Input event queue full!"));
591 }
592 }
593
594 /**
595 * Will be called by the MIDIIn Thread to signal the audio thread that a
596 * continuous controller value has changed. This method is meant for
597 * offline rendering and / or for cases where the exact position of the
598 * event in the current audio fragment is already known.
599 *
600 * @param Controller - MIDI controller number of the occured control change
601 * @param Value - value of the control change
602 * @param FragmentPos - sample point position in the current audio
603 * fragment to which this event belongs to
604 */
605 void EngineChannel::SendControlChange(uint8_t Controller, uint8_t Value, int32_t FragmentPos) {
606 if (FragmentPos < 0) {
607 dmsg(1,("EngineChannel::SendControlChange(): negative FragmentPos! Seems MIDI driver is buggy!"));
608 }
609 else if (pEngine) {
610 Event event = pEngine->pEventGenerator->CreateEvent(FragmentPos);
611 event.Type = Event::type_control_change;
612 event.Param.CC.Controller = Controller;
613 event.Param.CC.Value = Value;
614 event.pEngineChannel = this;
615 if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
616 else dmsg(1,("EngineChannel: Input event queue full!"));
617 }
618 }
619
620 void EngineChannel::ClearEventLists() {
621 pEvents->clear();
622 // empty MIDI key specific event lists
623 {
624 RTList<uint>::Iterator iuiKey = pActiveKeys->first();
625 RTList<uint>::Iterator end = pActiveKeys->end();
626 for(; iuiKey != end; ++iuiKey) {
627 pMIDIKeyInfo[*iuiKey].pEvents->clear(); // free all events on the key
628 }
629 }
630 }
631
632 void EngineChannel::ResetControllers() {
633 Pitch = 0;
634 SustainPedal = false;
635 SostenutoPedal = false;
636 GlobalVolume = 1.0f;
637 MidiVolume = 1.0;
638 GlobalPanLeft = 1.0f;
639 GlobalPanRight = 1.0f;
640 GlobalTranspose = 0;
641 // set all MIDI controller values to zero
642 memset(ControllerTable, 0x00, 129);
643 // reset all FX Send levels
644 for (
645 std::vector<FxSend*>::iterator iter = fxSends.begin();
646 iter != fxSends.end(); iter++
647 ) {
648 (*iter)->Reset();
649 }
650 }
651
652 /**
653 * Copy all events from the engine channel's input event queue buffer to
654 * the internal event list. This will be done at the beginning of each
655 * audio cycle (that is each RenderAudio() call) to distinguish all
656 * events which have to be processed in the current audio cycle. Each
657 * EngineChannel has it's own input event queue for the common channel
658 * specific events (like NoteOn, NoteOff and ControlChange events).
659 * Beside that, the engine also has a input event queue for global
660 * events (usually SysEx messages).
661 *
662 * @param Samples - number of sample points to be processed in the
663 * current audio cycle
664 */
665 void EngineChannel::ImportEvents(uint Samples) {
666 RingBuffer<Event,false>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader();
667 Event* pEvent;
668 while (true) {
669 // get next event from input event queue
670 if (!(pEvent = eventQueueReader.pop())) break;
671 // if younger event reached, ignore that and all subsequent ones for now
672 if (pEvent->FragmentPos() >= Samples) {
673 eventQueueReader--;
674 dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples));
675 pEvent->ResetFragmentPos();
676 break;
677 }
678 // copy event to internal event list
679 if (pEvents->poolIsEmpty()) {
680 dmsg(1,("Event pool emtpy!\n"));
681 break;
682 }
683 *pEvents->allocAppend() = *pEvent;
684 }
685 eventQueueReader.free(); // free all copied events from input queue
686 }
687
688 void EngineChannel::RemoveAllFxSends() {
689 if (pEngine) pEngine->DisableAndLock();
690 if (!fxSends.empty()) { // free local render buffers
691 if (pChannelLeft) {
692 delete pChannelLeft;
693 if (pEngine && pEngine->pAudioOutputDevice) {
694 // fallback to render directly to the AudioOutputDevice's buffer
695 pChannelLeft = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannelLeft);
696 } else pChannelLeft = NULL;
697 }
698 if (pChannelRight) {
699 delete pChannelRight;
700 if (pEngine && pEngine->pAudioOutputDevice) {
701 // fallback to render directly to the AudioOutputDevice's buffer
702 pChannelRight = pEngine->pAudioOutputDevice->Channel(AudioDeviceChannelRight);
703 } else pChannelRight = NULL;
704 }
705 }
706 for (int i = 0; i < fxSends.size(); i++) delete fxSends[i];
707 fxSends.clear();
708 if (pEngine) pEngine->Enable();
709 }
710
711 float EngineChannel::Volume() {
712 return GlobalVolume;
713 }
714
715 void EngineChannel::Volume(float f) {
716 GlobalVolume = f;
717 bStatusChanged = true; // status of engine channel has changed, so set notify flag
718 }
719
720 uint EngineChannel::Channels() {
721 return 2;
722 }
723
724 String EngineChannel::InstrumentFileName() {
725 return InstrumentFile;
726 }
727
728 String EngineChannel::InstrumentName() {
729 return InstrumentIdxName;
730 }
731
732 int EngineChannel::InstrumentIndex() {
733 return InstrumentIdx;
734 }
735
736 int EngineChannel::InstrumentStatus() {
737 return InstrumentStat;
738 }
739
740 String EngineChannel::EngineName() {
741 return LS_GIG_ENGINE_NAME;
742 }
743
744 }} // namespace LinuxSampler::gig

  ViewVC Help
Powered by ViewVC