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

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Revision 1037 - (show annotations) (download)
Tue Jan 23 20:03:22 2007 UTC (17 years, 2 months ago) by schoenebeck
File size: 81550 byte(s)
* bugfix regarding FX Sends: when more than one sampler channel used FX
  sends, only the audio signal of the last sampler channel made it into the
  final output signal
* fixed small autoconf compilation issue on certain systems (complained
  about missing AM_PATH_ARTS macro)

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 <sstream>
25 #include "DiskThread.h"
26 #include "Voice.h"
27 #include "EGADSR.h"
28 #include "../EngineFactory.h"
29
30 #include "Engine.h"
31
32 namespace LinuxSampler { namespace gig {
33
34 InstrumentResourceManager Engine::instruments;
35
36 std::map<AudioOutputDevice*,Engine*> Engine::engines;
37
38 /**
39 * Get a gig::Engine object for the given gig::EngineChannel and the
40 * given AudioOutputDevice. All engine channels which are connected to
41 * the same audio output device will use the same engine instance. This
42 * method will be called by a gig::EngineChannel whenever it's
43 * connecting to a audio output device.
44 *
45 * @param pChannel - engine channel which acquires an engine object
46 * @param pDevice - the audio output device \a pChannel is connected to
47 */
48 Engine* Engine::AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {
49 Engine* pEngine = NULL;
50 // check if there's already an engine for the given audio output device
51 if (engines.count(pDevice)) {
52 dmsg(4,("Using existing gig::Engine.\n"));
53 pEngine = engines[pDevice];
54 } else { // create a new engine (and disk thread) instance for the given audio output device
55 dmsg(4,("Creating new gig::Engine.\n"));
56 pEngine = (Engine*) EngineFactory::Create("gig");
57 pEngine->Connect(pDevice);
58 engines[pDevice] = pEngine;
59 }
60 // register engine channel to the engine instance
61 pEngine->engineChannels.add(pChannel);
62 // remember index in the ArrayList
63 pChannel->iEngineIndexSelf = pEngine->engineChannels.size() - 1;
64 dmsg(4,("This gig::Engine has now %d EngineChannels.\n",pEngine->engineChannels.size()));
65 return pEngine;
66 }
67
68 /**
69 * Once an engine channel is disconnected from an audio output device,
70 * it wil immediately call this method to unregister itself from the
71 * engine instance and if that engine instance is not used by any other
72 * engine channel anymore, then that engine instance will be destroyed.
73 *
74 * @param pChannel - engine channel which wants to disconnect from it's
75 * engine instance
76 * @param pDevice - audio output device \a pChannel was connected to
77 */
78 void Engine::FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {
79 dmsg(4,("Disconnecting EngineChannel from gig::Engine.\n"));
80 Engine* pEngine = engines[pDevice];
81 // unregister EngineChannel from the Engine instance
82 pEngine->engineChannels.remove(pChannel);
83 // if the used Engine instance is not used anymore, then destroy it
84 if (pEngine->engineChannels.empty()) {
85 pDevice->Disconnect(pEngine);
86 engines.erase(pDevice);
87 delete pEngine;
88 dmsg(4,("Destroying gig::Engine.\n"));
89 }
90 else dmsg(4,("This gig::Engine has now %d EngineChannels.\n",pEngine->engineChannels.size()));
91 }
92
93 /**
94 * Constructor
95 */
96 Engine::Engine() {
97 pAudioOutputDevice = NULL;
98 pDiskThread = NULL;
99 pEventGenerator = NULL;
100 pSysexBuffer = new RingBuffer<uint8_t,false>(CONFIG_SYSEX_BUFFER_SIZE, 0);
101 pEventQueue = new RingBuffer<Event,false>(CONFIG_MAX_EVENTS_PER_FRAGMENT, 0);
102 pEventPool = new Pool<Event>(CONFIG_MAX_EVENTS_PER_FRAGMENT);
103 pVoicePool = new Pool<Voice>(CONFIG_MAX_VOICES);
104 pVoiceStealingQueue = new RTList<Event>(pEventPool);
105 pGlobalEvents = new RTList<Event>(pEventPool);
106 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
107 iterVoice->SetEngine(this);
108 }
109 pVoicePool->clear();
110
111 ResetInternal();
112 ResetScaleTuning();
113 }
114
115 /**
116 * Destructor
117 */
118 Engine::~Engine() {
119 MidiInputPort::RemoveSysexListener(this);
120 if (pDiskThread) {
121 dmsg(1,("Stopping disk thread..."));
122 pDiskThread->StopThread();
123 delete pDiskThread;
124 dmsg(1,("OK\n"));
125 }
126 if (pEventQueue) delete pEventQueue;
127 if (pEventPool) delete pEventPool;
128 if (pVoicePool) {
129 pVoicePool->clear();
130 delete pVoicePool;
131 }
132 if (pEventGenerator) delete pEventGenerator;
133 if (pVoiceStealingQueue) delete pVoiceStealingQueue;
134 if (pSysexBuffer) delete pSysexBuffer;
135 Unregister();
136 }
137
138 void Engine::Enable() {
139 dmsg(3,("gig::Engine: enabling\n"));
140 EngineDisabled.PushAndUnlock(false, 2); // set condition object 'EngineDisabled' to false (wait max. 2s)
141 dmsg(3,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe()));
142 }
143
144 void Engine::Disable() {
145 dmsg(3,("gig::Engine: disabling\n"));
146 bool* pWasDisabled = EngineDisabled.PushAndUnlock(true, 2); // wait max. 2s
147 if (!pWasDisabled) dmsg(3,("gig::Engine warning: Timeout waiting to disable engine.\n"));
148 }
149
150 void Engine::DisableAndLock() {
151 dmsg(3,("gig::Engine: disabling\n"));
152 bool* pWasDisabled = EngineDisabled.Push(true, 2); // wait max. 2s
153 if (!pWasDisabled) dmsg(3,("gig::Engine warning: Timeout waiting to disable engine.\n"));
154 }
155
156 /**
157 * Reset all voices and disk thread and clear input event queue and all
158 * control and status variables.
159 */
160 void Engine::Reset() {
161 DisableAndLock();
162 ResetInternal();
163 ResetScaleTuning();
164 Enable();
165 }
166
167 /**
168 * Reset all voices and disk thread and clear input event queue and all
169 * control and status variables. This method is protected by a mutex.
170 */
171 void Engine::ResetInternal() {
172 ResetInternalMutex.Lock();
173
174 // make sure that the engine does not get any sysex messages
175 // while it's reseting
176 bool sysexDisabled = MidiInputPort::RemoveSysexListener(this);
177 ActiveVoiceCount = 0;
178 ActiveVoiceCountMax = 0;
179
180 // reset voice stealing parameters
181 pVoiceStealingQueue->clear();
182 itLastStolenVoice = RTList<Voice>::Iterator();
183 itLastStolenVoiceGlobally = RTList<Voice>::Iterator();
184 iuiLastStolenKey = RTList<uint>::Iterator();
185 iuiLastStolenKeyGlobally = RTList<uint>::Iterator();
186 pLastStolenChannel = NULL;
187
188 // reset all voices
189 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
190 iterVoice->Reset();
191 }
192 pVoicePool->clear();
193
194 // reset disk thread
195 if (pDiskThread) pDiskThread->Reset();
196
197 // delete all input events
198 pEventQueue->init();
199 pSysexBuffer->init();
200 if (sysexDisabled) MidiInputPort::AddSysexListener(this);
201 ResetInternalMutex.Unlock();
202 }
203
204 /**
205 * Reset to normal, chromatic scale (means equal tempered).
206 */
207 void Engine::ResetScaleTuning() {
208 memset(&ScaleTuning[0], 0x00, 12);
209 }
210
211 /**
212 * Connect this engine instance with the given audio output device.
213 * This method will be called when an Engine instance is created.
214 * All of the engine's data structures which are dependant to the used
215 * audio output device / driver will be (re)allocated and / or
216 * adjusted appropriately.
217 *
218 * @param pAudioOut - audio output device to connect to
219 */
220 void Engine::Connect(AudioOutputDevice* pAudioOut) {
221 pAudioOutputDevice = pAudioOut;
222
223 ResetInternal();
224
225 // inform audio driver for the need of two channels
226 try {
227 pAudioOutputDevice->AcquireChannels(2); // gig engine only stereo
228 }
229 catch (AudioOutputException e) {
230 String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message();
231 throw Exception(msg);
232 }
233
234 this->MaxSamplesPerCycle = pAudioOutputDevice->MaxSamplesPerCycle();
235 this->SampleRate = pAudioOutputDevice->SampleRate();
236
237 // FIXME: audio drivers with varying fragment sizes might be a problem here
238 MaxFadeOutPos = MaxSamplesPerCycle - int(double(SampleRate) * CONFIG_EG_MIN_RELEASE_TIME) - 1;
239 if (MaxFadeOutPos < 0) {
240 std::cerr << "gig::Engine: WARNING, CONFIG_EG_MIN_RELEASE_TIME "
241 << "too big for current audio fragment size & sampling rate! "
242 << "May lead to click sounds if voice stealing chimes in!\n" << std::flush;
243 // force volume ramp downs at the beginning of each fragment
244 MaxFadeOutPos = 0;
245 // lower minimum release time
246 const float minReleaseTime = (float) MaxSamplesPerCycle / (float) SampleRate;
247 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
248 iterVoice->EG1.CalculateFadeOutCoeff(minReleaseTime, SampleRate);
249 }
250 pVoicePool->clear();
251 }
252
253 // (re)create disk thread
254 if (this->pDiskThread) {
255 dmsg(1,("Stopping disk thread..."));
256 this->pDiskThread->StopThread();
257 delete this->pDiskThread;
258 dmsg(1,("OK\n"));
259 }
260 this->pDiskThread = new DiskThread(((pAudioOut->MaxSamplesPerCycle() << CONFIG_MAX_PITCH) << 1) + 6); //FIXME: assuming stereo
261 if (!pDiskThread) {
262 dmsg(0,("gig::Engine new diskthread = NULL\n"));
263 exit(EXIT_FAILURE);
264 }
265
266 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
267 iterVoice->pDiskThread = this->pDiskThread;
268 dmsg(3,("d"));
269 }
270 pVoicePool->clear();
271
272 // (re)create event generator
273 if (pEventGenerator) delete pEventGenerator;
274 pEventGenerator = new EventGenerator(pAudioOut->SampleRate());
275
276 dmsg(1,("Starting disk thread..."));
277 pDiskThread->StartThread();
278 dmsg(1,("OK\n"));
279
280 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
281 if (!iterVoice->pDiskThread) {
282 dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));
283 exit(EXIT_FAILURE);
284 }
285 }
286 }
287
288 /**
289 * Clear all engine global event lists.
290 */
291 void Engine::ClearEventLists() {
292 pGlobalEvents->clear();
293 }
294
295 /**
296 * Copy all events from the engine's global input queue buffer to the
297 * engine's internal event list. This will be done at the beginning of
298 * each audio cycle (that is each RenderAudio() call) to distinguish
299 * all global events which have to be processed in the current audio
300 * cycle. These events are usually just SysEx messages. Every
301 * EngineChannel has it's own input event queue buffer and event list
302 * to handle common events like NoteOn, NoteOff and ControlChange
303 * events.
304 *
305 * @param Samples - number of sample points to be processed in the
306 * current audio cycle
307 */
308 void Engine::ImportEvents(uint Samples) {
309 RingBuffer<Event,false>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader();
310 Event* pEvent;
311 while (true) {
312 // get next event from input event queue
313 if (!(pEvent = eventQueueReader.pop())) break;
314 // if younger event reached, ignore that and all subsequent ones for now
315 if (pEvent->FragmentPos() >= Samples) {
316 eventQueueReader--;
317 dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples));
318 pEvent->ResetFragmentPos();
319 break;
320 }
321 // copy event to internal event list
322 if (pGlobalEvents->poolIsEmpty()) {
323 dmsg(1,("Event pool emtpy!\n"));
324 break;
325 }
326 *pGlobalEvents->allocAppend() = *pEvent;
327 }
328 eventQueueReader.free(); // free all copied events from input queue
329 }
330
331 /**
332 * Let this engine proceed to render the given amount of sample points.
333 * The engine will iterate through all engine channels and render audio
334 * for each engine channel independently. The calculated audio data of
335 * all voices of each engine channel will be placed into the audio sum
336 * buffers of the respective audio output device, connected to the
337 * respective engine channel.
338 *
339 * @param Samples - number of sample points to be rendered
340 * @returns 0 on success
341 */
342 int Engine::RenderAudio(uint Samples) {
343 dmsg(7,("RenderAudio(Samples=%d)\n", Samples));
344
345 // return if engine disabled
346 if (EngineDisabled.Pop()) {
347 dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));
348 return 0;
349 }
350
351 // update time of start and end of this audio fragment (as events' time stamps relate to this)
352 pEventGenerator->UpdateFragmentTime(Samples);
353
354 // We only allow a maximum of CONFIG_MAX_VOICES voices to be spawned
355 // in each audio fragment. All subsequent request for spawning new
356 // voices in the same audio fragment will be ignored.
357 VoiceSpawnsLeft = CONFIG_MAX_VOICES;
358
359 // get all events from the engine's global input event queue which belong to the current fragment
360 // (these are usually just SysEx messages)
361 ImportEvents(Samples);
362
363 // process engine global events (these are currently only MIDI System Exclusive messages)
364 {
365 RTList<Event>::Iterator itEvent = pGlobalEvents->first();
366 RTList<Event>::Iterator end = pGlobalEvents->end();
367 for (; itEvent != end; ++itEvent) {
368 switch (itEvent->Type) {
369 case Event::type_sysex:
370 dmsg(5,("Engine: Sysex received\n"));
371 ProcessSysex(itEvent);
372 break;
373 }
374 }
375 }
376
377 // reset internal voice counter (just for statistic of active voices)
378 ActiveVoiceCountTemp = 0;
379
380 // handle events on all engine channels
381 for (int i = 0; i < engineChannels.size(); i++) {
382 if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
383 ProcessEvents(engineChannels[i], Samples);
384 }
385
386 // render all 'normal', active voices on all engine channels
387 for (int i = 0; i < engineChannels.size(); i++) {
388 if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
389 RenderActiveVoices(engineChannels[i], Samples);
390 }
391
392 // now that all ordinary voices on ALL engine channels are rendered, render new stolen voices
393 RenderStolenVoices(Samples);
394
395 // handle audio routing for engine channels with FX sends
396 for (int i = 0; i < engineChannels.size(); i++) {
397 if (engineChannels[i]->fxSends.empty()) continue; // ignore if no FX sends
398 RouteAudio(engineChannels[i], Samples);
399 }
400
401 // handle cleanup on all engine channels for the next audio fragment
402 for (int i = 0; i < engineChannels.size(); i++) {
403 if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
404 PostProcess(engineChannels[i]);
405 }
406
407
408 // empty the engine's event list for the next audio fragment
409 ClearEventLists();
410
411 // reset voice stealing for the next audio fragment
412 pVoiceStealingQueue->clear();
413
414 // just some statistics about this engine instance
415 ActiveVoiceCount = ActiveVoiceCountTemp;
416 if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;
417
418 FrameTime += Samples;
419
420 return 0;
421 }
422
423 /**
424 * Dispatch and handle all events in this audio fragment for the given
425 * engine channel.
426 *
427 * @param pEngineChannel - engine channel on which events should be
428 * processed
429 * @param Samples - amount of sample points to be processed in
430 * this audio fragment cycle
431 */
432 void Engine::ProcessEvents(EngineChannel* pEngineChannel, uint Samples) {
433 // get all events from the engine channels's input event queue which belong to the current fragment
434 // (these are the common events like NoteOn, NoteOff, ControlChange, etc.)
435 pEngineChannel->ImportEvents(Samples);
436
437 // process events
438 {
439 RTList<Event>::Iterator itEvent = pEngineChannel->pEvents->first();
440 RTList<Event>::Iterator end = pEngineChannel->pEvents->end();
441 for (; itEvent != end; ++itEvent) {
442 switch (itEvent->Type) {
443 case Event::type_note_on:
444 dmsg(5,("Engine: Note on received\n"));
445 ProcessNoteOn((EngineChannel*)itEvent->pEngineChannel, itEvent);
446 break;
447 case Event::type_note_off:
448 dmsg(5,("Engine: Note off received\n"));
449 ProcessNoteOff((EngineChannel*)itEvent->pEngineChannel, itEvent);
450 break;
451 case Event::type_control_change:
452 dmsg(5,("Engine: MIDI CC received\n"));
453 ProcessControlChange((EngineChannel*)itEvent->pEngineChannel, itEvent);
454 break;
455 case Event::type_pitchbend:
456 dmsg(5,("Engine: Pitchbend received\n"));
457 ProcessPitchbend((EngineChannel*)itEvent->pEngineChannel, itEvent);
458 break;
459 }
460 }
461 }
462
463 // reset voice stealing for the next engine channel (or next audio fragment)
464 itLastStolenVoice = RTList<Voice>::Iterator();
465 itLastStolenVoiceGlobally = RTList<Voice>::Iterator();
466 iuiLastStolenKey = RTList<uint>::Iterator();
467 iuiLastStolenKeyGlobally = RTList<uint>::Iterator();
468 pLastStolenChannel = NULL;
469 }
470
471 /**
472 * Render all 'normal' voices (that is voices which were not stolen in
473 * this fragment) on the given engine channel.
474 *
475 * @param pEngineChannel - engine channel on which audio should be
476 * rendered
477 * @param Samples - amount of sample points to be rendered in
478 * this audio fragment cycle
479 */
480 void Engine::RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples) {
481 #if !CONFIG_PROCESS_MUTED_CHANNELS
482 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
483 #endif
484
485 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
486 RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
487 while (iuiKey != end) { // iterate through all active keys
488 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
489 ++iuiKey;
490
491 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
492 RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
493 for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
494 // now render current voice
495 itVoice->Render(Samples);
496 if (itVoice->IsActive()) ActiveVoiceCountTemp++; // still active
497 else { // voice reached end, is now inactive
498 FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices
499 }
500 }
501 }
502 }
503
504 /**
505 * Render all stolen voices (only voices which were stolen in this
506 * fragment) on the given engine channel. Stolen voices are rendered
507 * after all normal voices have been rendered; this is needed to render
508 * audio of those voices which were selected for voice stealing until
509 * the point were the stealing (that is the take over of the voice)
510 * actually happened.
511 *
512 * @param pEngineChannel - engine channel on which audio should be
513 * rendered
514 * @param Samples - amount of sample points to be rendered in
515 * this audio fragment cycle
516 */
517 void Engine::RenderStolenVoices(uint Samples) {
518 RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();
519 RTList<Event>::Iterator end = pVoiceStealingQueue->end();
520 for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {
521 EngineChannel* pEngineChannel = (EngineChannel*) itVoiceStealEvent->pEngineChannel;
522 Pool<Voice>::Iterator itNewVoice =
523 LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false, false);
524 if (itNewVoice) {
525 itNewVoice->Render(Samples);
526 if (itNewVoice->IsActive()) ActiveVoiceCountTemp++; // still active
527 else { // voice reached end, is now inactive
528 FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices
529 }
530 }
531 else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));
532
533 // we need to clear the key's event list explicitly here in case key was never active
534 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoiceStealEvent->Param.Note.Key];
535 pKey->VoiceTheftsQueued--;
536 if (!pKey->Active && !pKey->VoiceTheftsQueued) pKey->pEvents->clear();
537 }
538 }
539
540 /**
541 * Will be called in case the respective engine channel sports FX send
542 * channels. In this particular case, engine channel local buffers are
543 * used to render and mix all voices to. This method is responsible for
544 * copying the audio data from those local buffers to the master audio
545 * output channels as well as to the FX send audio output channels with
546 * their respective FX send levels.
547 *
548 * @param pEngineChannel - engine channel from which audio should be
549 * routed
550 * @param Samples - amount of sample points to be routed in
551 * this audio fragment cycle
552 */
553 void Engine::RouteAudio(EngineChannel* pEngineChannel, uint Samples) {
554 // route master signal
555 {
556 AudioChannel* pDstL = pAudioOutputDevice->Channel(pEngineChannel->AudioDeviceChannelLeft);
557 AudioChannel* pDstR = pAudioOutputDevice->Channel(pEngineChannel->AudioDeviceChannelRight);
558 pEngineChannel->pChannelLeft->MixTo(pDstL, Samples);
559 pEngineChannel->pChannelRight->MixTo(pDstR, Samples);
560 }
561 // route FX send signal
562 {
563 for (int iFxSend = 0; iFxSend < pEngineChannel->GetFxSendCount(); iFxSend++) {
564 FxSend* pFxSend = pEngineChannel->GetFxSend(iFxSend);
565 // left channel
566 const int iDstL = pFxSend->DestinationChannel(0);
567 if (iDstL < 0) {
568 dmsg(1,("Engine::RouteAudio() Error: invalid FX send (L) destination channel"));
569 } else {
570 AudioChannel* pDstL = pAudioOutputDevice->Channel(iDstL);
571 if (!pDstL) {
572 dmsg(1,("Engine::RouteAudio() Error: invalid FX send (L) destination channel"));
573 } else pEngineChannel->pChannelLeft->MixTo(pDstL, Samples, pFxSend->Level());
574 }
575 // right channel
576 const int iDstR = pFxSend->DestinationChannel(1);
577 if (iDstR < 0) {
578 dmsg(1,("Engine::RouteAudio() Error: invalid FX send (R) destination channel"));
579 } else {
580 AudioChannel* pDstR = pAudioOutputDevice->Channel(iDstR);
581 if (!pDstR) {
582 dmsg(1,("Engine::RouteAudio() Error: invalid FX send (R) destination channel"));
583 } else pEngineChannel->pChannelRight->MixTo(pDstR, Samples, pFxSend->Level());
584 }
585 }
586 }
587 // reset buffers with silence (zero out) for the next audio cycle
588 pEngineChannel->pChannelLeft->Clear();
589 pEngineChannel->pChannelRight->Clear();
590 }
591
592 /**
593 * Free all keys which have turned inactive in this audio fragment, from
594 * the list of active keys and clear all event lists on that engine
595 * channel.
596 *
597 * @param pEngineChannel - engine channel to cleanup
598 */
599 void Engine::PostProcess(EngineChannel* pEngineChannel) {
600 // free all keys which have no active voices left
601 {
602 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
603 RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
604 while (iuiKey != end) { // iterate through all active keys
605 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
606 ++iuiKey;
607 if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);
608 #if CONFIG_DEVMODE
609 else { // just a sanity check for debugging
610 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
611 RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
612 for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
613 if (itVoice->itKillEvent) {
614 dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));
615 }
616 }
617 }
618 #endif // CONFIG_DEVMODE
619 }
620 }
621
622 // empty the engine channel's own event lists
623 pEngineChannel->ClearEventLists();
624 }
625
626 /**
627 * Will be called by the MIDI input device whenever a MIDI system
628 * exclusive message has arrived.
629 *
630 * @param pData - pointer to sysex data
631 * @param Size - lenght of sysex data (in bytes)
632 */
633 void Engine::SendSysex(void* pData, uint Size) {
634 Event event = pEventGenerator->CreateEvent();
635 event.Type = Event::type_sysex;
636 event.Param.Sysex.Size = Size;
637 event.pEngineChannel = NULL; // as Engine global event
638 if (pEventQueue->write_space() > 0) {
639 if (pSysexBuffer->write_space() >= Size) {
640 // copy sysex data to input buffer
641 uint toWrite = Size;
642 uint8_t* pPos = (uint8_t*) pData;
643 while (toWrite) {
644 const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end());
645 pSysexBuffer->write(pPos, writeNow);
646 toWrite -= writeNow;
647 pPos += writeNow;
648
649 }
650 // finally place sysex event into input event queue
651 pEventQueue->push(&event);
652 }
653 else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,CONFIG_SYSEX_BUFFER_SIZE));
654 }
655 else dmsg(1,("Engine: Input event queue full!"));
656 }
657
658 /**
659 * Assigns and triggers a new voice for the respective MIDI key.
660 *
661 * @param pEngineChannel - engine channel on which this event occured on
662 * @param itNoteOnEvent - key, velocity and time stamp of the event
663 */
664 void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
665 #if !CONFIG_PROCESS_MUTED_CHANNELS
666 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
667 #endif
668
669 const int key = itNoteOnEvent->Param.Note.Key;
670 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];
671
672 // move note on event to the key's own event list
673 RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);
674
675 // if Solo Mode then kill all already active voices
676 if (pEngineChannel->SoloMode) {
677 Pool<uint>::Iterator itYoungestKey = pEngineChannel->pActiveKeys->last();
678 if (itYoungestKey) {
679 const int iYoungestKey = *itYoungestKey;
680 const midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[iYoungestKey];
681 if (pOtherKey->Active) {
682 // get final portamento position of currently active voice
683 if (pEngineChannel->PortamentoMode) {
684 RTList<Voice>::Iterator itVoice = pOtherKey->pActiveVoices->last();
685 if (itVoice) itVoice->UpdatePortamentoPos(itNoteOnEventOnKeyList);
686 }
687 // kill all voices on the (other) key
688 RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
689 RTList<Voice>::Iterator end = pOtherKey->pActiveVoices->end();
690 for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
691 if (itVoiceToBeKilled->Type != Voice::type_release_trigger)
692 itVoiceToBeKilled->Kill(itNoteOnEventOnKeyList);
693 }
694 }
695 }
696 // set this key as 'currently active solo key'
697 pEngineChannel->SoloKey = key;
698 }
699
700 // Change key dimension value if key is in keyswitching area
701 {
702 const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;
703 if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
704 pEngineChannel->CurrentKeyDimension = float(key - pInstrument->DimensionKeyRange.low) /
705 (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
706 }
707
708 pKey->KeyPressed = true; // the MIDI key was now pressed down
709 pKey->Velocity = itNoteOnEventOnKeyList->Param.Note.Velocity;
710 pKey->NoteOnTime = FrameTime + itNoteOnEventOnKeyList->FragmentPos(); // will be used to calculate note length
711
712 // cancel release process of voices on this key if needed
713 if (pKey->Active && !pEngineChannel->SustainPedal) {
714 RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();
715 if (itCancelReleaseEvent) {
716 *itCancelReleaseEvent = *itNoteOnEventOnKeyList; // copy event
717 itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type
718 }
719 else dmsg(1,("Event pool emtpy!\n"));
720 }
721
722 // allocate and trigger new voice(s) for the key
723 {
724 // first, get total amount of required voices (dependant on amount of layers)
725 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEventOnKeyList->Param.Note.Key);
726 if (pRegion) {
727 int voicesRequired = pRegion->Layers;
728 // now launch the required amount of voices
729 for (int i = 0; i < voicesRequired; i++)
730 LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, i, false, true, true);
731 }
732 }
733
734 // if neither a voice was spawned or postponed then remove note on event from key again
735 if (!pKey->Active && !pKey->VoiceTheftsQueued)
736 pKey->pEvents->free(itNoteOnEventOnKeyList);
737
738 if (!pEngineChannel->SoloMode || pEngineChannel->PortamentoPos < 0.0f) pEngineChannel->PortamentoPos = (float) key;
739 pKey->RoundRobinIndex++;
740 }
741
742 /**
743 * Releases the voices on the given key if sustain pedal is not pressed.
744 * If sustain is pressed, the release of the note will be postponed until
745 * sustain pedal will be released or voice turned inactive by itself (e.g.
746 * due to completion of sample playback).
747 *
748 * @param pEngineChannel - engine channel on which this event occured on
749 * @param itNoteOffEvent - key, velocity and time stamp of the event
750 */
751 void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {
752 #if !CONFIG_PROCESS_MUTED_CHANNELS
753 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
754 #endif
755
756 const int iKey = itNoteOffEvent->Param.Note.Key;
757 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[iKey];
758 pKey->KeyPressed = false; // the MIDI key was now released
759
760 // move event to the key's own event list
761 RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);
762
763 bool bShouldRelease = pKey->Active && ShouldReleaseVoice(pEngineChannel, itNoteOffEventOnKeyList->Param.Note.Key);
764
765 // in case Solo Mode is enabled, kill all voices on this key and respawn a voice on the highest pressed key (if any)
766 if (pEngineChannel->SoloMode) { //TODO: this feels like too much code just for handling solo mode :P
767 bool bOtherKeysPressed = false;
768 if (iKey == pEngineChannel->SoloKey) {
769 pEngineChannel->SoloKey = -1;
770 // if there's still a key pressed down, respawn a voice (group) on the highest key
771 for (int i = 127; i > 0; i--) {
772 midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[i];
773 if (pOtherKey->KeyPressed) {
774 bOtherKeysPressed = true;
775 // make the other key the new 'currently active solo key'
776 pEngineChannel->SoloKey = i;
777 // get final portamento position of currently active voice
778 if (pEngineChannel->PortamentoMode) {
779 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
780 if (itVoice) itVoice->UpdatePortamentoPos(itNoteOffEventOnKeyList);
781 }
782 // create a pseudo note on event
783 RTList<Event>::Iterator itPseudoNoteOnEvent = pOtherKey->pEvents->allocAppend();
784 if (itPseudoNoteOnEvent) {
785 // copy event
786 *itPseudoNoteOnEvent = *itNoteOffEventOnKeyList;
787 // transform event to a note on event
788 itPseudoNoteOnEvent->Type = Event::type_note_on;
789 itPseudoNoteOnEvent->Param.Note.Key = i;
790 itPseudoNoteOnEvent->Param.Note.Velocity = pOtherKey->Velocity;
791 // allocate and trigger new voice(s) for the other key
792 {
793 // first, get total amount of required voices (dependant on amount of layers)
794 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(i);
795 if (pRegion) {
796 int voicesRequired = pRegion->Layers;
797 // now launch the required amount of voices
798 for (int iLayer = 0; iLayer < voicesRequired; iLayer++)
799 LaunchVoice(pEngineChannel, itPseudoNoteOnEvent, iLayer, false, true, false);
800 }
801 }
802 // if neither a voice was spawned or postponed then remove note on event from key again
803 if (!pOtherKey->Active && !pOtherKey->VoiceTheftsQueued)
804 pOtherKey->pEvents->free(itPseudoNoteOnEvent);
805
806 } else dmsg(1,("Could not respawn voice, no free event left\n"));
807 break; // done
808 }
809 }
810 }
811 if (bOtherKeysPressed) {
812 if (pKey->Active) { // kill all voices on this key
813 bShouldRelease = false; // no need to release, as we kill it here
814 RTList<Voice>::Iterator itVoiceToBeKilled = pKey->pActiveVoices->first();
815 RTList<Voice>::Iterator end = pKey->pActiveVoices->end();
816 for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
817 if (itVoiceToBeKilled->Type != Voice::type_release_trigger)
818 itVoiceToBeKilled->Kill(itNoteOffEventOnKeyList);
819 }
820 }
821 } else pEngineChannel->PortamentoPos = -1.0f;
822 }
823
824 // if no solo mode (the usual case) or if solo mode and no other key pressed, then release voices on this key if needed
825 if (bShouldRelease) {
826 itNoteOffEventOnKeyList->Type = Event::type_release; // transform event type
827
828 // spawn release triggered voice(s) if needed
829 if (pKey->ReleaseTrigger) {
830 // first, get total amount of required voices (dependant on amount of layers)
831 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOffEventOnKeyList->Param.Note.Key);
832 if (pRegion) {
833 int voicesRequired = pRegion->Layers;
834
835 // MIDI note-on velocity is used instead of note-off velocity
836 itNoteOffEventOnKeyList->Param.Note.Velocity = pKey->Velocity;
837
838 // now launch the required amount of voices
839 for (int i = 0; i < voicesRequired; i++)
840 LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, i, true, false, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
841 }
842 pKey->ReleaseTrigger = false;
843 }
844 }
845
846 // if neither a voice was spawned or postponed on this key then remove note off event from key again
847 if (!pKey->Active && !pKey->VoiceTheftsQueued)
848 pKey->pEvents->free(itNoteOffEventOnKeyList);
849 }
850
851 /**
852 * Moves pitchbend event from the general (input) event list to the engine
853 * channel's event list. It will actually processed later by the
854 * respective voice.
855 *
856 * @param pEngineChannel - engine channel on which this event occured on
857 * @param itPitchbendEvent - absolute pitch value and time stamp of the event
858 */
859 void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) {
860 pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value
861 }
862
863 /**
864 * Allocates and triggers a new voice. This method will usually be
865 * called by the ProcessNoteOn() method and by the voices itself
866 * (e.g. to spawn further voices on the same key for layered sounds).
867 *
868 * @param pEngineChannel - engine channel on which this event occured on
869 * @param itNoteOnEvent - key, velocity and time stamp of the event
870 * @param iLayer - layer index for the new voice (optional - only
871 * in case of layered sounds of course)
872 * @param ReleaseTriggerVoice - if new voice is a release triggered voice
873 * (optional, default = false)
874 * @param VoiceStealing - if voice stealing should be performed
875 * when there is no free voice
876 * (optional, default = true)
877 * @param HandleKeyGroupConflicts - if voices should be killed due to a
878 * key group conflict
879 * @returns pointer to new voice or NULL if there was no free voice or
880 * if the voice wasn't triggered (for example when no region is
881 * defined for the given key).
882 */
883 Pool<Voice>::Iterator Engine::LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing, bool HandleKeyGroupConflicts) {
884 int MIDIKey = itNoteOnEvent->Param.Note.Key;
885 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[MIDIKey];
886 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(MIDIKey);
887
888 // if nothing defined for this key
889 if (!pRegion) return Pool<Voice>::Iterator(); // nothing to do
890
891 // only mark the first voice of a layered voice (group) to be in a
892 // key group, so the layered voices won't kill each other
893 int iKeyGroup = (iLayer == 0 && !ReleaseTriggerVoice) ? pRegion->KeyGroup : 0;
894
895 // handle key group (a.k.a. exclusive group) conflicts
896 if (HandleKeyGroupConflicts) {
897 if (iKeyGroup) { // if this voice / key belongs to a key group
898 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[iKeyGroup];
899 if (*ppKeyGroup) { // if there's already an active key in that key group
900 midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[**ppKeyGroup];
901 // kill all voices on the (other) key
902 RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
903 RTList<Voice>::Iterator end = pOtherKey->pActiveVoices->end();
904 for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
905 if (itVoiceToBeKilled->Type != Voice::type_release_trigger) {
906 itVoiceToBeKilled->Kill(itNoteOnEvent);
907 --VoiceSpawnsLeft; //FIXME: just a hack, we should better check in StealVoice() if the voice was killed due to key conflict
908 }
909 }
910 }
911 }
912 }
913
914 Voice::type_t VoiceType = Voice::type_normal;
915
916 // get current dimension values to select the right dimension region
917 //TODO: for stolen voices this dimension region selection block is processed twice, this should be changed
918 //FIXME: controller values for selecting the dimension region here are currently not sample accurate
919 uint DimValues[8] = { 0 };
920 for (int i = pRegion->Dimensions - 1; i >= 0; i--) {
921 switch (pRegion->pDimensionDefinitions[i].dimension) {
922 case ::gig::dimension_samplechannel:
923 DimValues[i] = 0; //TODO: we currently ignore this dimension
924 break;
925 case ::gig::dimension_layer:
926 DimValues[i] = iLayer;
927 break;
928 case ::gig::dimension_velocity:
929 DimValues[i] = itNoteOnEvent->Param.Note.Velocity;
930 break;
931 case ::gig::dimension_channelaftertouch:
932 DimValues[i] = pEngineChannel->ControllerTable[128];
933 break;
934 case ::gig::dimension_releasetrigger:
935 VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;
936 DimValues[i] = (uint) ReleaseTriggerVoice;
937 break;
938 case ::gig::dimension_keyboard:
939 DimValues[i] = (uint) (pEngineChannel->CurrentKeyDimension * pRegion->pDimensionDefinitions[i].zones);
940 break;
941 case ::gig::dimension_roundrobin:
942 DimValues[i] = (uint) pEngineChannel->pMIDIKeyInfo[MIDIKey].RoundRobinIndex; // incremented for each note on
943 break;
944 case ::gig::dimension_random:
945 RandomSeed = RandomSeed * 1103515245 + 12345; // classic pseudo random number generator
946 DimValues[i] = (uint) RandomSeed >> (32 - pRegion->pDimensionDefinitions[i].bits); // highest bits are most random
947 break;
948 case ::gig::dimension_modwheel:
949 DimValues[i] = pEngineChannel->ControllerTable[1];
950 break;
951 case ::gig::dimension_breath:
952 DimValues[i] = pEngineChannel->ControllerTable[2];
953 break;
954 case ::gig::dimension_foot:
955 DimValues[i] = pEngineChannel->ControllerTable[4];
956 break;
957 case ::gig::dimension_portamentotime:
958 DimValues[i] = pEngineChannel->ControllerTable[5];
959 break;
960 case ::gig::dimension_effect1:
961 DimValues[i] = pEngineChannel->ControllerTable[12];
962 break;
963 case ::gig::dimension_effect2:
964 DimValues[i] = pEngineChannel->ControllerTable[13];
965 break;
966 case ::gig::dimension_genpurpose1:
967 DimValues[i] = pEngineChannel->ControllerTable[16];
968 break;
969 case ::gig::dimension_genpurpose2:
970 DimValues[i] = pEngineChannel->ControllerTable[17];
971 break;
972 case ::gig::dimension_genpurpose3:
973 DimValues[i] = pEngineChannel->ControllerTable[18];
974 break;
975 case ::gig::dimension_genpurpose4:
976 DimValues[i] = pEngineChannel->ControllerTable[19];
977 break;
978 case ::gig::dimension_sustainpedal:
979 DimValues[i] = pEngineChannel->ControllerTable[64];
980 break;
981 case ::gig::dimension_portamento:
982 DimValues[i] = pEngineChannel->ControllerTable[65];
983 break;
984 case ::gig::dimension_sostenutopedal:
985 DimValues[i] = pEngineChannel->ControllerTable[66];
986 break;
987 case ::gig::dimension_softpedal:
988 DimValues[i] = pEngineChannel->ControllerTable[67];
989 break;
990 case ::gig::dimension_genpurpose5:
991 DimValues[i] = pEngineChannel->ControllerTable[80];
992 break;
993 case ::gig::dimension_genpurpose6:
994 DimValues[i] = pEngineChannel->ControllerTable[81];
995 break;
996 case ::gig::dimension_genpurpose7:
997 DimValues[i] = pEngineChannel->ControllerTable[82];
998 break;
999 case ::gig::dimension_genpurpose8:
1000 DimValues[i] = pEngineChannel->ControllerTable[83];
1001 break;
1002 case ::gig::dimension_effect1depth:
1003 DimValues[i] = pEngineChannel->ControllerTable[91];
1004 break;
1005 case ::gig::dimension_effect2depth:
1006 DimValues[i] = pEngineChannel->ControllerTable[92];
1007 break;
1008 case ::gig::dimension_effect3depth:
1009 DimValues[i] = pEngineChannel->ControllerTable[93];
1010 break;
1011 case ::gig::dimension_effect4depth:
1012 DimValues[i] = pEngineChannel->ControllerTable[94];
1013 break;
1014 case ::gig::dimension_effect5depth:
1015 DimValues[i] = pEngineChannel->ControllerTable[95];
1016 break;
1017 case ::gig::dimension_none:
1018 std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;
1019 break;
1020 default:
1021 std::cerr << "gig::Engine::LaunchVoice() Error: Unknown dimension\n" << std::flush;
1022 }
1023 }
1024 ::gig::DimensionRegion* pDimRgn = pRegion->GetDimensionRegionByValue(DimValues);
1025
1026 // no need to continue if sample is silent
1027 if (!pDimRgn->pSample || !pDimRgn->pSample->SamplesTotal) return Pool<Voice>::Iterator();
1028
1029 // allocate a new voice for the key
1030 Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
1031 if (itNewVoice) {
1032 // launch the new voice
1033 if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pDimRgn, VoiceType, iKeyGroup) < 0) {
1034 dmsg(4,("Voice not triggered\n"));
1035 pKey->pActiveVoices->free(itNewVoice);
1036 }
1037 else { // on success
1038 --VoiceSpawnsLeft;
1039 if (!pKey->Active) { // mark as active key
1040 pKey->Active = true;
1041 pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();
1042 *pKey->itSelf = itNoteOnEvent->Param.Note.Key;
1043 }
1044 if (itNewVoice->KeyGroup) {
1045 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];
1046 *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group
1047 }
1048 if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)
1049 return itNewVoice; // success
1050 }
1051 }
1052 else if (VoiceStealing) {
1053 // try to steal one voice
1054 int result = StealVoice(pEngineChannel, itNoteOnEvent);
1055 if (!result) { // voice stolen successfully
1056 // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died
1057 RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();
1058 if (itStealEvent) {
1059 *itStealEvent = *itNoteOnEvent; // copy event
1060 itStealEvent->Param.Note.Layer = iLayer;
1061 itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;
1062 pKey->VoiceTheftsQueued++;
1063 }
1064 else dmsg(1,("Voice stealing queue full!\n"));
1065 }
1066 }
1067
1068 return Pool<Voice>::Iterator(); // no free voice or error
1069 }
1070
1071 /**
1072 * Will be called by LaunchVoice() method in case there are no free
1073 * voices left. This method will select and kill one old voice for
1074 * voice stealing and postpone the note-on event until the selected
1075 * voice actually died.
1076 *
1077 * @param pEngineChannel - engine channel on which this event occured on
1078 * @param itNoteOnEvent - key, velocity and time stamp of the event
1079 * @returns 0 on success, a value < 0 if no active voice could be picked for voice stealing
1080 */
1081 int Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
1082 if (VoiceSpawnsLeft <= 0) {
1083 dmsg(1,("Max. voice thefts per audio fragment reached (you may raise CONFIG_MAX_VOICES).\n"));
1084 return -1;
1085 }
1086 if (!pEventPool->poolIsEmpty()) {
1087
1088 RTList<Voice>::Iterator itSelectedVoice;
1089
1090 // Select one voice for voice stealing
1091 switch (CONFIG_VOICE_STEAL_ALGO) {
1092
1093 // try to pick the oldest voice on the key where the new
1094 // voice should be spawned, if there is no voice on that
1095 // key, or no voice left to kill, then procceed with
1096 // 'oldestkey' algorithm
1097 case voice_steal_algo_oldestvoiceonkey: {
1098 midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
1099 itSelectedVoice = pSelectedKey->pActiveVoices->first();
1100 // proceed iterating if voice was created in this fragment cycle
1101 while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
1102 // if we haven't found a voice then proceed with algorithm 'oldestkey'
1103 if (itSelectedVoice && itSelectedVoice->IsStealable()) break;
1104 } // no break - intentional !
1105
1106 // try to pick the oldest voice on the oldest active key
1107 // from the same engine channel
1108 // (caution: must stay after 'oldestvoiceonkey' algorithm !)
1109 case voice_steal_algo_oldestkey: {
1110 // if we already stole in this fragment, try to proceed on same key
1111 if (this->itLastStolenVoice) {
1112 itSelectedVoice = this->itLastStolenVoice;
1113 do {
1114 ++itSelectedVoice;
1115 } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle
1116 // found a "stealable" voice ?
1117 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1118 // remember which voice we stole, so we can simply proceed on next voice stealing
1119 this->itLastStolenVoice = itSelectedVoice;
1120 break; // selection succeeded
1121 }
1122 }
1123 // get (next) oldest key
1124 RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKey) ? ++this->iuiLastStolenKey : pEngineChannel->pActiveKeys->first();
1125 while (iuiSelectedKey) {
1126 midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];
1127 itSelectedVoice = pSelectedKey->pActiveVoices->first();
1128 // proceed iterating if voice was created in this fragment cycle
1129 while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
1130 // found a "stealable" voice ?
1131 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1132 // remember which voice on which key we stole, so we can simply proceed on next voice stealing
1133 this->iuiLastStolenKey = iuiSelectedKey;
1134 this->itLastStolenVoice = itSelectedVoice;
1135 break; // selection succeeded
1136 }
1137 ++iuiSelectedKey; // get next oldest key
1138 }
1139 break;
1140 }
1141
1142 // don't steal anything
1143 case voice_steal_algo_none:
1144 default: {
1145 dmsg(1,("No free voice (voice stealing disabled)!\n"));
1146 return -1;
1147 }
1148 }
1149
1150 // if we couldn't steal a voice from the same engine channel then
1151 // steal oldest voice on the oldest key from any other engine channel
1152 // (the smaller engine channel number, the higher priority)
1153 if (!itSelectedVoice || !itSelectedVoice->IsStealable()) {
1154 EngineChannel* pSelectedChannel;
1155 int iChannelIndex;
1156 // select engine channel
1157 if (pLastStolenChannel) {
1158 pSelectedChannel = pLastStolenChannel;
1159 iChannelIndex = pSelectedChannel->iEngineIndexSelf;
1160 } else { // pick the engine channel followed by this engine channel
1161 iChannelIndex = (pEngineChannel->iEngineIndexSelf + 1) % engineChannels.size();
1162 pSelectedChannel = engineChannels[iChannelIndex];
1163 }
1164
1165 // if we already stole in this fragment, try to proceed on same key
1166 if (this->itLastStolenVoiceGlobally) {
1167 itSelectedVoice = this->itLastStolenVoiceGlobally;
1168 do {
1169 ++itSelectedVoice;
1170 } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle
1171 }
1172
1173 #if CONFIG_DEVMODE
1174 EngineChannel* pBegin = pSelectedChannel; // to detect endless loop
1175 #endif // CONFIG_DEVMODE
1176
1177 // did we find a 'stealable' voice?
1178 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1179 // remember which voice we stole, so we can simply proceed on next voice stealing
1180 this->itLastStolenVoiceGlobally = itSelectedVoice;
1181 } else while (true) { // iterate through engine channels
1182 // get (next) oldest key
1183 RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKeyGlobally) ? ++this->iuiLastStolenKeyGlobally : pSelectedChannel->pActiveKeys->first();
1184 this->iuiLastStolenKeyGlobally = RTList<uint>::Iterator(); // to prevent endless loop (see line above)
1185 while (iuiSelectedKey) {
1186 midi_key_info_t* pSelectedKey = &pSelectedChannel->pMIDIKeyInfo[*iuiSelectedKey];
1187 itSelectedVoice = pSelectedKey->pActiveVoices->first();
1188 // proceed iterating if voice was created in this fragment cycle
1189 while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
1190 // found a "stealable" voice ?
1191 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1192 // remember which voice on which key on which engine channel we stole, so we can simply proceed on next voice stealing
1193 this->iuiLastStolenKeyGlobally = iuiSelectedKey;
1194 this->itLastStolenVoiceGlobally = itSelectedVoice;
1195 this->pLastStolenChannel = pSelectedChannel;
1196 goto stealable_voice_found; // selection succeeded
1197 }
1198 ++iuiSelectedKey; // get next key on current engine channel
1199 }
1200 // get next engine channel
1201 iChannelIndex = (iChannelIndex + 1) % engineChannels.size();
1202 pSelectedChannel = engineChannels[iChannelIndex];
1203
1204 #if CONFIG_DEVMODE
1205 if (pSelectedChannel == pBegin) {
1206 dmsg(1,("FATAL ERROR: voice stealing endless loop!\n"));
1207 dmsg(1,("VoiceSpawnsLeft=%d.\n", VoiceSpawnsLeft));
1208 dmsg(1,("Exiting.\n"));
1209 exit(-1);
1210 }
1211 #endif // CONFIG_DEVMODE
1212 }
1213 }
1214
1215 // jump point if a 'stealable' voice was found
1216 stealable_voice_found:
1217
1218 #if CONFIG_DEVMODE
1219 if (!itSelectedVoice->IsActive()) {
1220 dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));
1221 return -1;
1222 }
1223 #endif // CONFIG_DEVMODE
1224
1225 // now kill the selected voice
1226 itSelectedVoice->Kill(itNoteOnEvent);
1227
1228 --VoiceSpawnsLeft;
1229
1230 return 0; // success
1231 }
1232 else {
1233 dmsg(1,("Event pool emtpy!\n"));
1234 return -1;
1235 }
1236 }
1237
1238 /**
1239 * Removes the given voice from the MIDI key's list of active voices.
1240 * This method will be called when a voice went inactive, e.g. because
1241 * it finished to playback its sample, finished its release stage or
1242 * just was killed.
1243 *
1244 * @param pEngineChannel - engine channel on which this event occured on
1245 * @param itVoice - points to the voice to be freed
1246 */
1247 void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) {
1248 if (itVoice) {
1249 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoice->MIDIKey];
1250
1251 uint keygroup = itVoice->KeyGroup;
1252
1253 // free the voice object
1254 pVoicePool->free(itVoice);
1255
1256 // if no other voices left and member of a key group, remove from key group
1257 if (pKey->pActiveVoices->isEmpty() && keygroup) {
1258 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[keygroup];
1259 if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group
1260 }
1261 }
1262 else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;
1263 }
1264
1265 /**
1266 * Called when there's no more voice left on a key, this call will
1267 * update the key info respectively.
1268 *
1269 * @param pEngineChannel - engine channel on which this event occured on
1270 * @param pKey - key which is now inactive
1271 */
1272 void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) {
1273 if (pKey->pActiveVoices->isEmpty()) {
1274 pKey->Active = false;
1275 pEngineChannel->pActiveKeys->free(pKey->itSelf); // remove key from list of active keys
1276 pKey->itSelf = RTList<uint>::Iterator();
1277 pKey->ReleaseTrigger = false;
1278 pKey->pEvents->clear();
1279 dmsg(3,("Key has no more voices now\n"));
1280 }
1281 else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n"));
1282 }
1283
1284 /**
1285 * Reacts on supported control change commands (e.g. pitch bend wheel,
1286 * modulation wheel, aftertouch).
1287 *
1288 * @param pEngineChannel - engine channel on which this event occured on
1289 * @param itControlChangeEvent - controller, value and time stamp of the event
1290 */
1291 void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) {
1292 dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
1293
1294 // update controller value in the engine channel's controller table
1295 pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
1296
1297 // handle hard coded MIDI controllers
1298 switch (itControlChangeEvent->Param.CC.Controller) {
1299 case 5: { // portamento time
1300 pEngineChannel->PortamentoTime = (float) itControlChangeEvent->Param.CC.Value / 127.0f * (float) CONFIG_PORTAMENTO_TIME_MAX + (float) CONFIG_PORTAMENTO_TIME_MIN;
1301 break;
1302 }
1303 case 7: { // volume
1304 //TODO: not sample accurate yet
1305 pEngineChannel->MidiVolume = VolumeCurve[itControlChangeEvent->Param.CC.Value];
1306 pEngineChannel->bStatusChanged = true; // engine channel status has changed, so set notify flag
1307 break;
1308 }
1309 case 10: { // panpot
1310 //TODO: not sample accurate yet
1311 pEngineChannel->GlobalPanLeft = PanCurve[128 - itControlChangeEvent->Param.CC.Value];
1312 pEngineChannel->GlobalPanRight = PanCurve[itControlChangeEvent->Param.CC.Value];
1313 break;
1314 }
1315 case 64: { // sustain
1316 if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {
1317 dmsg(4,("DAMPER (RIGHT) PEDAL DOWN\n"));
1318 pEngineChannel->SustainPedal = true;
1319
1320 #if !CONFIG_PROCESS_MUTED_CHANNELS
1321 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1322 #endif
1323
1324 // cancel release process of voices if necessary
1325 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1326 for (; iuiKey; ++iuiKey) {
1327 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1328 if (!pKey->KeyPressed) {
1329 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1330 if (itNewEvent) {
1331 *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
1332 itNewEvent->Type = Event::type_cancel_release; // transform event type
1333 }
1334 else dmsg(1,("Event pool emtpy!\n"));
1335 }
1336 }
1337 }
1338 if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {
1339 dmsg(4,("DAMPER (RIGHT) PEDAL UP\n"));
1340 pEngineChannel->SustainPedal = false;
1341
1342 #if !CONFIG_PROCESS_MUTED_CHANNELS
1343 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1344 #endif
1345
1346 // release voices if their respective key is not pressed
1347 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1348 for (; iuiKey; ++iuiKey) {
1349 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1350 if (!pKey->KeyPressed && ShouldReleaseVoice(pEngineChannel, *iuiKey)) {
1351 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1352 if (itNewEvent) {
1353 *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
1354 itNewEvent->Type = Event::type_release; // transform event type
1355 }
1356 else dmsg(1,("Event pool emtpy!\n"));
1357 }
1358 }
1359 }
1360 break;
1361 }
1362 case 65: { // portamento on / off
1363 KillAllVoices(pEngineChannel, itControlChangeEvent);
1364 pEngineChannel->PortamentoMode = itControlChangeEvent->Param.CC.Value >= 64;
1365 break;
1366 }
1367 case 66: { // sostenuto
1368 if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SostenutoPedal) {
1369 dmsg(4,("SOSTENUTO (CENTER) PEDAL DOWN\n"));
1370 pEngineChannel->SostenutoPedal = true;
1371
1372 #if !CONFIG_PROCESS_MUTED_CHANNELS
1373 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1374 #endif
1375
1376 SostenutoKeyCount = 0;
1377 // Remeber the pressed keys
1378 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1379 for (; iuiKey; ++iuiKey) {
1380 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1381 if (pKey->KeyPressed && SostenutoKeyCount < 128) SostenutoKeys[SostenutoKeyCount++] = *iuiKey;
1382 }
1383 }
1384 if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SostenutoPedal) {
1385 dmsg(4,("SOSTENUTO (CENTER) PEDAL UP\n"));
1386 pEngineChannel->SostenutoPedal = false;
1387
1388 #if !CONFIG_PROCESS_MUTED_CHANNELS
1389 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1390 #endif
1391
1392 // release voices if the damper pedal is up and their respective key is not pressed
1393 for (int i = 0; i < SostenutoKeyCount; i++) {
1394 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[SostenutoKeys[i]];
1395 if (!pKey->KeyPressed && !pEngineChannel->SustainPedal) {
1396 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1397 if (itNewEvent) {
1398 *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
1399 itNewEvent->Type = Event::type_release; // transform event type
1400 }
1401 else dmsg(1,("Event pool emtpy!\n"));
1402 }
1403 }
1404 }
1405 break;
1406 }
1407
1408
1409 // Channel Mode Messages
1410
1411 case 120: { // all sound off
1412 KillAllVoices(pEngineChannel, itControlChangeEvent);
1413 break;
1414 }
1415 case 121: { // reset all controllers
1416 pEngineChannel->ResetControllers();
1417 break;
1418 }
1419 case 123: { // all notes off
1420 #if CONFIG_PROCESS_ALL_NOTES_OFF
1421 ReleaseAllVoices(pEngineChannel, itControlChangeEvent);
1422 #endif // CONFIG_PROCESS_ALL_NOTES_OFF
1423 break;
1424 }
1425 case 126: { // mono mode on
1426 KillAllVoices(pEngineChannel, itControlChangeEvent);
1427 pEngineChannel->SoloMode = true;
1428 break;
1429 }
1430 case 127: { // poly mode on
1431 KillAllVoices(pEngineChannel, itControlChangeEvent);
1432 pEngineChannel->SoloMode = false;
1433 break;
1434 }
1435 }
1436
1437 // handle FX send controllers
1438 if (!pEngineChannel->fxSends.empty()) {
1439 for (int iFxSend = 0; iFxSend < pEngineChannel->GetFxSendCount(); iFxSend++) {
1440 FxSend* pFxSend = pEngineChannel->GetFxSend(iFxSend);
1441 if (pFxSend->MidiController() == itControlChangeEvent->Param.CC.Controller)
1442 pFxSend->SetLevel(itControlChangeEvent->Param.CC.Value);
1443 }
1444 }
1445 }
1446
1447 /**
1448 * Reacts on MIDI system exclusive messages.
1449 *
1450 * @param itSysexEvent - sysex data size and time stamp of the sysex event
1451 */
1452 void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {
1453 RingBuffer<uint8_t,false>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader();
1454
1455 uint8_t exclusive_status, id;
1456 if (!reader.pop(&exclusive_status)) goto free_sysex_data;
1457 if (!reader.pop(&id)) goto free_sysex_data;
1458 if (exclusive_status != 0xF0) goto free_sysex_data;
1459
1460 switch (id) {
1461 case 0x41: { // Roland
1462 dmsg(3,("Roland Sysex\n"));
1463 uint8_t device_id, model_id, cmd_id;
1464 if (!reader.pop(&device_id)) goto free_sysex_data;
1465 if (!reader.pop(&model_id)) goto free_sysex_data;
1466 if (!reader.pop(&cmd_id)) goto free_sysex_data;
1467 if (model_id != 0x42 /*GS*/) goto free_sysex_data;
1468 if (cmd_id != 0x12 /*DT1*/) goto free_sysex_data;
1469
1470 // command address
1471 uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB)
1472 const RingBuffer<uint8_t,false>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later
1473 if (reader.read(&addr[0], 3) != 3) goto free_sysex_data;
1474 if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters
1475 dmsg(3,("\tSystem Parameter\n"));
1476 }
1477 else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters
1478 dmsg(3,("\tCommon Parameter\n"));
1479 }
1480 else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)
1481 dmsg(3,("\tPart Parameter\n"));
1482 switch (addr[2]) {
1483 case 0x40: { // scale tuning
1484 dmsg(3,("\t\tScale Tuning\n"));
1485 uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave
1486 if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data;
1487 uint8_t checksum;
1488 if (!reader.pop(&checksum)) goto free_sysex_data;
1489 #if CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1490 if (GSCheckSum(checksum_reader, 12)) goto free_sysex_data;
1491 #endif // CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1492 for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;
1493 AdjustScale((int8_t*) scale_tunes);
1494 dmsg(3,("\t\t\tNew scale applied.\n"));
1495 break;
1496 }
1497 }
1498 }
1499 else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)
1500 }
1501 else if (addr[0] == 0x41) { // Drum Setup Parameters
1502 }
1503 break;
1504 }
1505 }
1506
1507 free_sysex_data: // finally free sysex data
1508 pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);
1509 }
1510
1511 /**
1512 * Calculates the Roland GS sysex check sum.
1513 *
1514 * @param AddrReader - reader which currently points to the first GS
1515 * command address byte of the GS sysex message in
1516 * question
1517 * @param DataSize - size of the GS message data (in bytes)
1518 */
1519 uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t,false>::NonVolatileReader AddrReader, uint DataSize) {
1520 RingBuffer<uint8_t,false>::NonVolatileReader reader = AddrReader;
1521 uint bytes = 3 /*addr*/ + DataSize;
1522 uint8_t addr_and_data[bytes];
1523 reader.read(&addr_and_data[0], bytes);
1524 uint8_t sum = 0;
1525 for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];
1526 return 128 - sum % 128;
1527 }
1528
1529 /**
1530 * Allows to tune each of the twelve semitones of an octave.
1531 *
1532 * @param ScaleTunes - detuning of all twelve semitones (in cents)
1533 */
1534 void Engine::AdjustScale(int8_t ScaleTunes[12]) {
1535 memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate
1536 }
1537
1538 /**
1539 * Releases all voices on an engine channel. All voices will go into
1540 * the release stage and thus it might take some time (e.g. dependant to
1541 * their envelope release time) until they actually die.
1542 *
1543 * @param pEngineChannel - engine channel on which all voices should be released
1544 * @param itReleaseEvent - event which caused this releasing of all voices
1545 */
1546 void Engine::ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent) {
1547 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1548 while (iuiKey) {
1549 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1550 ++iuiKey;
1551 // append a 'release' event to the key's own event list
1552 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1553 if (itNewEvent) {
1554 *itNewEvent = *itReleaseEvent; // copy original event (to the key's event list)
1555 itNewEvent->Type = Event::type_release; // transform event type
1556 }
1557 else dmsg(1,("Event pool emtpy!\n"));
1558 }
1559 }
1560
1561 /**
1562 * Kills all voices on an engine channel as soon as possible. Voices
1563 * won't get into release state, their volume level will be ramped down
1564 * as fast as possible.
1565 *
1566 * @param pEngineChannel - engine channel on which all voices should be killed
1567 * @param itKillEvent - event which caused this killing of all voices
1568 */
1569 void Engine::KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent) {
1570 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1571 RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
1572 while (iuiKey != end) { // iterate through all active keys
1573 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1574 ++iuiKey;
1575 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
1576 RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
1577 for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
1578 itVoice->Kill(itKillEvent);
1579 --VoiceSpawnsLeft; //FIXME: just a temporary workaround, we should check the cause in StealVoice() instead
1580 }
1581 }
1582 }
1583
1584 /**
1585 * Determines whether the specified voice should be released.
1586 *
1587 * @param pEngineChannel - The engine channel on which the voice should be checked
1588 * @param Key - The key number
1589 * @returns true if the specified should be released, false otherwise.
1590 */
1591 bool Engine::ShouldReleaseVoice(EngineChannel* pEngineChannel, int Key) {
1592 if (pEngineChannel->SustainPedal) return false;
1593
1594 if (pEngineChannel->SostenutoPedal) {
1595 for (int i = 0; i < SostenutoKeyCount; i++)
1596 if (Key == SostenutoKeys[i]) return false;
1597 }
1598
1599 return true;
1600 }
1601
1602 uint Engine::VoiceCount() {
1603 return ActiveVoiceCount;
1604 }
1605
1606 uint Engine::VoiceCountMax() {
1607 return ActiveVoiceCountMax;
1608 }
1609
1610 bool Engine::DiskStreamSupported() {
1611 return true;
1612 }
1613
1614 uint Engine::DiskStreamCount() {
1615 return (pDiskThread) ? pDiskThread->ActiveStreamCount : 0;
1616 }
1617
1618 uint Engine::DiskStreamCountMax() {
1619 return (pDiskThread) ? pDiskThread->ActiveStreamCountMax : 0;
1620 }
1621
1622 String Engine::DiskStreamBufferFillBytes() {
1623 return pDiskThread->GetBufferFillBytes();
1624 }
1625
1626 String Engine::DiskStreamBufferFillPercentage() {
1627 return pDiskThread->GetBufferFillPercentage();
1628 }
1629
1630 String Engine::EngineName() {
1631 return LS_GIG_ENGINE_NAME;
1632 }
1633
1634 String Engine::Description() {
1635 return "Gigasampler Engine";
1636 }
1637
1638 String Engine::Version() {
1639 String s = "$Revision: 1.70 $";
1640 return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
1641 }
1642
1643 InstrumentManager* Engine::GetInstrumentManager() {
1644 return &instruments;
1645 }
1646
1647 // static constant initializers
1648 const float* Engine::VolumeCurve(InitVolumeCurve());
1649 const float* Engine::PanCurve(InitPanCurve());
1650 const float* Engine::CrossfadeCurve(InitCrossfadeCurve());
1651
1652 float* Engine::InitVolumeCurve() {
1653 // line-segment approximation
1654 const float segments[] = {
1655 0, 0, 2, 0.0046, 16, 0.016, 31, 0.051, 45, 0.115, 54.5, 0.2,
1656 64.5, 0.39, 74, 0.74, 92, 1.03, 114, 1.94, 119.2, 2.2, 127, 2.2
1657 };
1658 return InitCurve(segments);
1659 }
1660
1661 float* Engine::InitPanCurve() {
1662 // line-segment approximation
1663 const float segments[] = {
1664 0, 0, 1, 0,
1665 2, 0.05, 31.5, 0.7, 51, 0.851, 74.5, 1.12,
1666 127, 1.41, 128, 1.41
1667 };
1668 return InitCurve(segments, 129);
1669 }
1670
1671 float* Engine::InitCrossfadeCurve() {
1672 // line-segment approximation
1673 const float segments[] = {
1674 0, 0, 1, 0.03, 10, 0.1, 51, 0.58, 127, 1
1675 };
1676 return InitCurve(segments);
1677 }
1678
1679 float* Engine::InitCurve(const float* segments, int size) {
1680 float* y = new float[size];
1681 for (int x = 0 ; x < size ; x++) {
1682 if (x > segments[2]) segments += 2;
1683 y[x] = segments[1] + (x - segments[0]) *
1684 (segments[3] - segments[1]) / (segments[2] - segments[0]);
1685 }
1686 return y;
1687 }
1688
1689 }} // namespace LinuxSampler::gig

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