/[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 849 - (show annotations) (download)
Sat Mar 25 13:05:59 2006 UTC (18 years ago) by schoenebeck
File size: 77907 byte(s)
* added compile time option to disable processing of All-Notes-Off
  MIDI messages

1 /***************************************************************************
2 * *
3 * LinuxSampler - modular, streaming capable sampler *
4 * *
5 * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6 * Copyright (C) 2005, 2006 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>(CONFIG_SYSEX_BUFFER_SIZE, 0);
101 pEventQueue = new RingBuffer<Event>(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 EngineFactory::Destroy(this);
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 LinuxSamplerException(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>::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. The
333 * calculated audio data of all voices of this engine will be placed into
334 * the engine's audio sum buffer which has to be copied and eventually be
335 * converted to the appropriate value range by the audio output class (e.g.
336 * AlsaIO or JackIO) right after.
337 *
338 * @param Samples - number of sample points to be rendered
339 * @returns 0 on success
340 */
341 int Engine::RenderAudio(uint Samples) {
342 dmsg(5,("RenderAudio(Samples=%d)\n", Samples));
343
344 // return if engine disabled
345 if (EngineDisabled.Pop()) {
346 dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));
347 return 0;
348 }
349
350 // update time of start and end of this audio fragment (as events' time stamps relate to this)
351 pEventGenerator->UpdateFragmentTime(Samples);
352
353 // We only allow a maximum of CONFIG_MAX_VOICES voices to be spawned
354 // in each audio fragment. All subsequent request for spawning new
355 // voices in the same audio fragment will be ignored.
356 VoiceSpawnsLeft = CONFIG_MAX_VOICES;
357
358 // get all events from the engine's global input event queue which belong to the current fragment
359 // (these are usually just SysEx messages)
360 ImportEvents(Samples);
361
362 // process engine global events (these are currently only MIDI System Exclusive messages)
363 {
364 RTList<Event>::Iterator itEvent = pGlobalEvents->first();
365 RTList<Event>::Iterator end = pGlobalEvents->end();
366 for (; itEvent != end; ++itEvent) {
367 switch (itEvent->Type) {
368 case Event::type_sysex:
369 dmsg(5,("Engine: Sysex received\n"));
370 ProcessSysex(itEvent);
371 break;
372 }
373 }
374 }
375
376 // reset internal voice counter (just for statistic of active voices)
377 ActiveVoiceCountTemp = 0;
378
379 // handle events on all engine channels
380 for (int i = 0; i < engineChannels.size(); i++) {
381 if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
382 ProcessEvents(engineChannels[i], Samples);
383 }
384
385 // render all 'normal', active voices on all engine channels
386 for (int i = 0; i < engineChannels.size(); i++) {
387 if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
388 RenderActiveVoices(engineChannels[i], Samples);
389 }
390
391 // now that all ordinary voices on ALL engine channels are rendered, render new stolen voices
392 RenderStolenVoices(Samples);
393
394 // handle cleanup on all engine channels for the next audio fragment
395 for (int i = 0; i < engineChannels.size(); i++) {
396 if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
397 PostProcess(engineChannels[i]);
398 }
399
400
401 // empty the engine's event list for the next audio fragment
402 ClearEventLists();
403
404 // reset voice stealing for the next audio fragment
405 pVoiceStealingQueue->clear();
406
407 // just some statistics about this engine instance
408 ActiveVoiceCount = ActiveVoiceCountTemp;
409 if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;
410
411 FrameTime += Samples;
412
413 return 0;
414 }
415
416 /**
417 * Dispatch and handle all events in this audio fragment for the given
418 * engine channel.
419 *
420 * @param pEngineChannel - engine channel on which events should be
421 * processed
422 * @param Samples - amount of sample points to be processed in
423 * this audio fragment cycle
424 */
425 void Engine::ProcessEvents(EngineChannel* pEngineChannel, uint Samples) {
426 // get all events from the engine channels's input event queue which belong to the current fragment
427 // (these are the common events like NoteOn, NoteOff, ControlChange, etc.)
428 pEngineChannel->ImportEvents(Samples);
429
430 // process events
431 {
432 RTList<Event>::Iterator itEvent = pEngineChannel->pEvents->first();
433 RTList<Event>::Iterator end = pEngineChannel->pEvents->end();
434 for (; itEvent != end; ++itEvent) {
435 switch (itEvent->Type) {
436 case Event::type_note_on:
437 dmsg(5,("Engine: Note on received\n"));
438 ProcessNoteOn((EngineChannel*)itEvent->pEngineChannel, itEvent);
439 break;
440 case Event::type_note_off:
441 dmsg(5,("Engine: Note off received\n"));
442 ProcessNoteOff((EngineChannel*)itEvent->pEngineChannel, itEvent);
443 break;
444 case Event::type_control_change:
445 dmsg(5,("Engine: MIDI CC received\n"));
446 ProcessControlChange((EngineChannel*)itEvent->pEngineChannel, itEvent);
447 break;
448 case Event::type_pitchbend:
449 dmsg(5,("Engine: Pitchbend received\n"));
450 ProcessPitchbend((EngineChannel*)itEvent->pEngineChannel, itEvent);
451 break;
452 }
453 }
454 }
455
456 // reset voice stealing for the next engine channel (or next audio fragment)
457 itLastStolenVoice = RTList<Voice>::Iterator();
458 itLastStolenVoiceGlobally = RTList<Voice>::Iterator();
459 iuiLastStolenKey = RTList<uint>::Iterator();
460 iuiLastStolenKeyGlobally = RTList<uint>::Iterator();
461 pLastStolenChannel = NULL;
462 }
463
464 /**
465 * Render all 'normal' voices (that is voices which were not stolen in
466 * this fragment) on the given engine channel.
467 *
468 * @param pEngineChannel - engine channel on which audio should be
469 * rendered
470 * @param Samples - amount of sample points to be rendered in
471 * this audio fragment cycle
472 */
473 void Engine::RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples) {
474 #if !CONFIG_PROCESS_MUTED_CHANNELS
475 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
476 #endif
477
478 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
479 RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
480 while (iuiKey != end) { // iterate through all active keys
481 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
482 ++iuiKey;
483
484 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
485 RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
486 for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
487 // now render current voice
488 itVoice->Render(Samples);
489 if (itVoice->IsActive()) ActiveVoiceCountTemp++; // still active
490 else { // voice reached end, is now inactive
491 FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices
492 }
493 }
494 }
495 }
496
497 /**
498 * Render all stolen voices (only voices which were stolen in this
499 * fragment) on the given engine channel. Stolen voices are rendered
500 * after all normal voices have been rendered; this is needed to render
501 * audio of those voices which were selected for voice stealing until
502 * the point were the stealing (that is the take over of the voice)
503 * actually happened.
504 *
505 * @param pEngineChannel - engine channel on which audio should be
506 * rendered
507 * @param Samples - amount of sample points to be rendered in
508 * this audio fragment cycle
509 */
510 void Engine::RenderStolenVoices(uint Samples) {
511 RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();
512 RTList<Event>::Iterator end = pVoiceStealingQueue->end();
513 for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {
514 EngineChannel* pEngineChannel = (EngineChannel*) itVoiceStealEvent->pEngineChannel;
515 Pool<Voice>::Iterator itNewVoice =
516 LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false, false);
517 if (itNewVoice) {
518 itNewVoice->Render(Samples);
519 if (itNewVoice->IsActive()) ActiveVoiceCountTemp++; // still active
520 else { // voice reached end, is now inactive
521 FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices
522 }
523 }
524 else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));
525
526 // we need to clear the key's event list explicitly here in case key was never active
527 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoiceStealEvent->Param.Note.Key];
528 pKey->VoiceTheftsQueued--;
529 if (!pKey->Active && !pKey->VoiceTheftsQueued) pKey->pEvents->clear();
530 }
531 }
532
533 /**
534 * Free all keys which have turned inactive in this audio fragment, from
535 * the list of active keys and clear all event lists on that engine
536 * channel.
537 *
538 * @param pEngineChannel - engine channel to cleanup
539 */
540 void Engine::PostProcess(EngineChannel* pEngineChannel) {
541 // free all keys which have no active voices left
542 {
543 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
544 RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
545 while (iuiKey != end) { // iterate through all active keys
546 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
547 ++iuiKey;
548 if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);
549 #if CONFIG_DEVMODE
550 else { // just a sanity check for debugging
551 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
552 RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
553 for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
554 if (itVoice->itKillEvent) {
555 dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));
556 }
557 }
558 }
559 #endif // CONFIG_DEVMODE
560 }
561 }
562
563 // empty the engine channel's own event lists
564 pEngineChannel->ClearEventLists();
565 }
566
567 /**
568 * Will be called by the MIDI input device whenever a MIDI system
569 * exclusive message has arrived.
570 *
571 * @param pData - pointer to sysex data
572 * @param Size - lenght of sysex data (in bytes)
573 */
574 void Engine::SendSysex(void* pData, uint Size) {
575 Event event = pEventGenerator->CreateEvent();
576 event.Type = Event::type_sysex;
577 event.Param.Sysex.Size = Size;
578 event.pEngineChannel = NULL; // as Engine global event
579 if (pEventQueue->write_space() > 0) {
580 if (pSysexBuffer->write_space() >= Size) {
581 // copy sysex data to input buffer
582 uint toWrite = Size;
583 uint8_t* pPos = (uint8_t*) pData;
584 while (toWrite) {
585 const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end());
586 pSysexBuffer->write(pPos, writeNow);
587 toWrite -= writeNow;
588 pPos += writeNow;
589
590 }
591 // finally place sysex event into input event queue
592 pEventQueue->push(&event);
593 }
594 else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,CONFIG_SYSEX_BUFFER_SIZE));
595 }
596 else dmsg(1,("Engine: Input event queue full!"));
597 }
598
599 /**
600 * Assigns and triggers a new voice for the respective MIDI key.
601 *
602 * @param pEngineChannel - engine channel on which this event occured on
603 * @param itNoteOnEvent - key, velocity and time stamp of the event
604 */
605 void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
606 #if !CONFIG_PROCESS_MUTED_CHANNELS
607 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
608 #endif
609
610 const int key = itNoteOnEvent->Param.Note.Key;
611 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];
612
613 // move note on event to the key's own event list
614 RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);
615
616 // if Solo Mode then kill all already active voices
617 if (pEngineChannel->SoloMode) {
618 Pool<uint>::Iterator itYoungestKey = pEngineChannel->pActiveKeys->last();
619 if (itYoungestKey) {
620 const int iYoungestKey = *itYoungestKey;
621 const midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[iYoungestKey];
622 if (pOtherKey->Active) {
623 // get final portamento position of currently active voice
624 if (pEngineChannel->PortamentoMode) {
625 RTList<Voice>::Iterator itVoice = pOtherKey->pActiveVoices->last();
626 if (itVoice) itVoice->UpdatePortamentoPos(itNoteOnEventOnKeyList);
627 }
628 // kill all voices on the (other) key
629 RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
630 RTList<Voice>::Iterator end = pOtherKey->pActiveVoices->end();
631 for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
632 if (itVoiceToBeKilled->Type != Voice::type_release_trigger)
633 itVoiceToBeKilled->Kill(itNoteOnEventOnKeyList);
634 }
635 }
636 }
637 // set this key as 'currently active solo key'
638 pEngineChannel->SoloKey = key;
639 }
640
641 // Change key dimension value if key is in keyswitching area
642 {
643 const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;
644 if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
645 pEngineChannel->CurrentKeyDimension = ((key - pInstrument->DimensionKeyRange.low) * 128) /
646 (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
647 }
648
649 pKey->KeyPressed = true; // the MIDI key was now pressed down
650 pKey->Velocity = itNoteOnEventOnKeyList->Param.Note.Velocity;
651 pKey->NoteOnTime = FrameTime + itNoteOnEventOnKeyList->FragmentPos(); // will be used to calculate note length
652
653 // cancel release process of voices on this key if needed
654 if (pKey->Active && !pEngineChannel->SustainPedal) {
655 RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();
656 if (itCancelReleaseEvent) {
657 *itCancelReleaseEvent = *itNoteOnEventOnKeyList; // copy event
658 itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type
659 }
660 else dmsg(1,("Event pool emtpy!\n"));
661 }
662
663 // allocate and trigger new voice(s) for the key
664 {
665 // first, get total amount of required voices (dependant on amount of layers)
666 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEventOnKeyList->Param.Note.Key);
667 if (pRegion) {
668 int voicesRequired = pRegion->Layers;
669 // now launch the required amount of voices
670 for (int i = 0; i < voicesRequired; i++)
671 LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, i, false, true, true);
672 }
673 }
674
675 // if neither a voice was spawned or postponed then remove note on event from key again
676 if (!pKey->Active && !pKey->VoiceTheftsQueued)
677 pKey->pEvents->free(itNoteOnEventOnKeyList);
678
679 if (!pEngineChannel->SoloMode || pEngineChannel->PortamentoPos < 0.0f) pEngineChannel->PortamentoPos = (float) key;
680 pKey->RoundRobinIndex++;
681 }
682
683 /**
684 * Releases the voices on the given key if sustain pedal is not pressed.
685 * If sustain is pressed, the release of the note will be postponed until
686 * sustain pedal will be released or voice turned inactive by itself (e.g.
687 * due to completion of sample playback).
688 *
689 * @param pEngineChannel - engine channel on which this event occured on
690 * @param itNoteOffEvent - key, velocity and time stamp of the event
691 */
692 void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {
693 #if !CONFIG_PROCESS_MUTED_CHANNELS
694 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
695 #endif
696
697 const int iKey = itNoteOffEvent->Param.Note.Key;
698 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[iKey];
699 pKey->KeyPressed = false; // the MIDI key was now released
700
701 // move event to the key's own event list
702 RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);
703
704 bool bShouldRelease = pKey->Active && ShouldReleaseVoice(pEngineChannel, itNoteOffEventOnKeyList->Param.Note.Key);
705
706 // in case Solo Mode is enabled, kill all voices on this key and respawn a voice on the highest pressed key (if any)
707 if (pEngineChannel->SoloMode) { //TODO: this feels like too much code just for handling solo mode :P
708 bool bOtherKeysPressed = false;
709 if (iKey == pEngineChannel->SoloKey) {
710 pEngineChannel->SoloKey = -1;
711 // if there's still a key pressed down, respawn a voice (group) on the highest key
712 for (int i = 127; i > 0; i--) {
713 midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[i];
714 if (pOtherKey->KeyPressed) {
715 bOtherKeysPressed = true;
716 // make the other key the new 'currently active solo key'
717 pEngineChannel->SoloKey = i;
718 // get final portamento position of currently active voice
719 if (pEngineChannel->PortamentoMode) {
720 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
721 if (itVoice) itVoice->UpdatePortamentoPos(itNoteOffEventOnKeyList);
722 }
723 // create a pseudo note on event
724 RTList<Event>::Iterator itPseudoNoteOnEvent = pOtherKey->pEvents->allocAppend();
725 if (itPseudoNoteOnEvent) {
726 // copy event
727 *itPseudoNoteOnEvent = *itNoteOffEventOnKeyList;
728 // transform event to a note on event
729 itPseudoNoteOnEvent->Type = Event::type_note_on;
730 itPseudoNoteOnEvent->Param.Note.Key = i;
731 itPseudoNoteOnEvent->Param.Note.Velocity = pOtherKey->Velocity;
732 // allocate and trigger new voice(s) for the other key
733 {
734 // first, get total amount of required voices (dependant on amount of layers)
735 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(i);
736 if (pRegion) {
737 int voicesRequired = pRegion->Layers;
738 // now launch the required amount of voices
739 for (int iLayer = 0; iLayer < voicesRequired; iLayer++)
740 LaunchVoice(pEngineChannel, itPseudoNoteOnEvent, iLayer, false, true, false);
741 }
742 }
743 // if neither a voice was spawned or postponed then remove note on event from key again
744 if (!pOtherKey->Active && !pOtherKey->VoiceTheftsQueued)
745 pOtherKey->pEvents->free(itPseudoNoteOnEvent);
746
747 } else dmsg(1,("Could not respawn voice, no free event left\n"));
748 break; // done
749 }
750 }
751 }
752 if (bOtherKeysPressed) {
753 if (pKey->Active) { // kill all voices on this key
754 bShouldRelease = false; // no need to release, as we kill it here
755 RTList<Voice>::Iterator itVoiceToBeKilled = pKey->pActiveVoices->first();
756 RTList<Voice>::Iterator end = pKey->pActiveVoices->end();
757 for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
758 if (itVoiceToBeKilled->Type != Voice::type_release_trigger)
759 itVoiceToBeKilled->Kill(itNoteOffEventOnKeyList);
760 }
761 }
762 } else pEngineChannel->PortamentoPos = -1.0f;
763 }
764
765 // if no solo mode (the usual case) or if solo mode and no other key pressed, then release voices on this key if needed
766 if (bShouldRelease) {
767 itNoteOffEventOnKeyList->Type = Event::type_release; // transform event type
768
769 // spawn release triggered voice(s) if needed
770 if (pKey->ReleaseTrigger) {
771 // first, get total amount of required voices (dependant on amount of layers)
772 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOffEventOnKeyList->Param.Note.Key);
773 if (pRegion) {
774 int voicesRequired = pRegion->Layers;
775
776 // MIDI note-on velocity is used instead of note-off velocity
777 itNoteOffEventOnKeyList->Param.Note.Velocity = pKey->Velocity;
778
779 // now launch the required amount of voices
780 for (int i = 0; i < voicesRequired; i++)
781 LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, i, true, false, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
782 }
783 pKey->ReleaseTrigger = false;
784 }
785 }
786
787 // if neither a voice was spawned or postponed on this key then remove note off event from key again
788 if (!pKey->Active && !pKey->VoiceTheftsQueued)
789 pKey->pEvents->free(itNoteOffEventOnKeyList);
790 }
791
792 /**
793 * Moves pitchbend event from the general (input) event list to the engine
794 * channel's event list. It will actually processed later by the
795 * respective voice.
796 *
797 * @param pEngineChannel - engine channel on which this event occured on
798 * @param itPitchbendEvent - absolute pitch value and time stamp of the event
799 */
800 void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) {
801 pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value
802 }
803
804 /**
805 * Allocates and triggers a new voice. This method will usually be
806 * called by the ProcessNoteOn() method and by the voices itself
807 * (e.g. to spawn further voices on the same key for layered sounds).
808 *
809 * @param pEngineChannel - engine channel on which this event occured on
810 * @param itNoteOnEvent - key, velocity and time stamp of the event
811 * @param iLayer - layer index for the new voice (optional - only
812 * in case of layered sounds of course)
813 * @param ReleaseTriggerVoice - if new voice is a release triggered voice
814 * (optional, default = false)
815 * @param VoiceStealing - if voice stealing should be performed
816 * when there is no free voice
817 * (optional, default = true)
818 * @param HandleKeyGroupConflicts - if voices should be killed due to a
819 * key group conflict
820 * @returns pointer to new voice or NULL if there was no free voice or
821 * if the voice wasn't triggered (for example when no region is
822 * defined for the given key).
823 */
824 Pool<Voice>::Iterator Engine::LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing, bool HandleKeyGroupConflicts) {
825 int MIDIKey = itNoteOnEvent->Param.Note.Key;
826 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[MIDIKey];
827 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(MIDIKey);
828
829 // if nothing defined for this key
830 if (!pRegion) return Pool<Voice>::Iterator(); // nothing to do
831
832 // only mark the first voice of a layered voice (group) to be in a
833 // key group, so the layered voices won't kill each other
834 int iKeyGroup = (iLayer == 0 && !ReleaseTriggerVoice) ? pRegion->KeyGroup : 0;
835
836 // handle key group (a.k.a. exclusive group) conflicts
837 if (HandleKeyGroupConflicts) {
838 if (iKeyGroup) { // if this voice / key belongs to a key group
839 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[iKeyGroup];
840 if (*ppKeyGroup) { // if there's already an active key in that key group
841 midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[**ppKeyGroup];
842 // kill all voices on the (other) key
843 RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
844 RTList<Voice>::Iterator end = pOtherKey->pActiveVoices->end();
845 for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
846 if (itVoiceToBeKilled->Type != Voice::type_release_trigger) {
847 itVoiceToBeKilled->Kill(itNoteOnEvent);
848 --VoiceSpawnsLeft; //FIXME: just a hack, we should better check in StealVoice() if the voice was killed due to key conflict
849 }
850 }
851 }
852 }
853 }
854
855 Voice::type_t VoiceType = Voice::type_normal;
856
857 // get current dimension values to select the right dimension region
858 //TODO: for stolen voices this dimension region selection block is processed twice, this should be changed
859 //FIXME: controller values for selecting the dimension region here are currently not sample accurate
860 uint DimValues[8] = { 0 };
861 for (int i = pRegion->Dimensions - 1; i >= 0; i--) {
862 switch (pRegion->pDimensionDefinitions[i].dimension) {
863 case ::gig::dimension_samplechannel:
864 DimValues[i] = 0; //TODO: we currently ignore this dimension
865 break;
866 case ::gig::dimension_layer:
867 DimValues[i] = iLayer;
868 break;
869 case ::gig::dimension_velocity:
870 DimValues[i] = itNoteOnEvent->Param.Note.Velocity;
871 break;
872 case ::gig::dimension_channelaftertouch:
873 DimValues[i] = 0; //TODO: we currently ignore this dimension
874 break;
875 case ::gig::dimension_releasetrigger:
876 VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;
877 DimValues[i] = (uint) ReleaseTriggerVoice;
878 break;
879 case ::gig::dimension_keyboard:
880 DimValues[i] = (uint) pEngineChannel->CurrentKeyDimension;
881 break;
882 case ::gig::dimension_roundrobin:
883 DimValues[i] = (uint) pEngineChannel->pMIDIKeyInfo[MIDIKey].RoundRobinIndex; // incremented for each note on
884 break;
885 case ::gig::dimension_random:
886 RandomSeed = RandomSeed * 1103515245 + 12345; // classic pseudo random number generator
887 DimValues[i] = (uint) RandomSeed >> (32 - pRegion->pDimensionDefinitions[i].bits); // highest bits are most random
888 break;
889 case ::gig::dimension_modwheel:
890 DimValues[i] = pEngineChannel->ControllerTable[1];
891 break;
892 case ::gig::dimension_breath:
893 DimValues[i] = pEngineChannel->ControllerTable[2];
894 break;
895 case ::gig::dimension_foot:
896 DimValues[i] = pEngineChannel->ControllerTable[4];
897 break;
898 case ::gig::dimension_portamentotime:
899 DimValues[i] = pEngineChannel->ControllerTable[5];
900 break;
901 case ::gig::dimension_effect1:
902 DimValues[i] = pEngineChannel->ControllerTable[12];
903 break;
904 case ::gig::dimension_effect2:
905 DimValues[i] = pEngineChannel->ControllerTable[13];
906 break;
907 case ::gig::dimension_genpurpose1:
908 DimValues[i] = pEngineChannel->ControllerTable[16];
909 break;
910 case ::gig::dimension_genpurpose2:
911 DimValues[i] = pEngineChannel->ControllerTable[17];
912 break;
913 case ::gig::dimension_genpurpose3:
914 DimValues[i] = pEngineChannel->ControllerTable[18];
915 break;
916 case ::gig::dimension_genpurpose4:
917 DimValues[i] = pEngineChannel->ControllerTable[19];
918 break;
919 case ::gig::dimension_sustainpedal:
920 DimValues[i] = pEngineChannel->ControllerTable[64];
921 break;
922 case ::gig::dimension_portamento:
923 DimValues[i] = pEngineChannel->ControllerTable[65];
924 break;
925 case ::gig::dimension_sostenutopedal:
926 DimValues[i] = pEngineChannel->ControllerTable[66];
927 break;
928 case ::gig::dimension_softpedal:
929 DimValues[i] = pEngineChannel->ControllerTable[67];
930 break;
931 case ::gig::dimension_genpurpose5:
932 DimValues[i] = pEngineChannel->ControllerTable[80];
933 break;
934 case ::gig::dimension_genpurpose6:
935 DimValues[i] = pEngineChannel->ControllerTable[81];
936 break;
937 case ::gig::dimension_genpurpose7:
938 DimValues[i] = pEngineChannel->ControllerTable[82];
939 break;
940 case ::gig::dimension_genpurpose8:
941 DimValues[i] = pEngineChannel->ControllerTable[83];
942 break;
943 case ::gig::dimension_effect1depth:
944 DimValues[i] = pEngineChannel->ControllerTable[91];
945 break;
946 case ::gig::dimension_effect2depth:
947 DimValues[i] = pEngineChannel->ControllerTable[92];
948 break;
949 case ::gig::dimension_effect3depth:
950 DimValues[i] = pEngineChannel->ControllerTable[93];
951 break;
952 case ::gig::dimension_effect4depth:
953 DimValues[i] = pEngineChannel->ControllerTable[94];
954 break;
955 case ::gig::dimension_effect5depth:
956 DimValues[i] = pEngineChannel->ControllerTable[95];
957 break;
958 case ::gig::dimension_none:
959 std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;
960 break;
961 default:
962 std::cerr << "gig::Engine::LaunchVoice() Error: Unknown dimension\n" << std::flush;
963 }
964 }
965 ::gig::DimensionRegion* pDimRgn = pRegion->GetDimensionRegionByValue(DimValues);
966
967 // no need to continue if sample is silent
968 if (!pDimRgn->pSample || !pDimRgn->pSample->SamplesTotal) return Pool<Voice>::Iterator();
969
970 // allocate a new voice for the key
971 Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
972 if (itNewVoice) {
973 // launch the new voice
974 if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pDimRgn, VoiceType, iKeyGroup) < 0) {
975 dmsg(4,("Voice not triggered\n"));
976 pKey->pActiveVoices->free(itNewVoice);
977 }
978 else { // on success
979 --VoiceSpawnsLeft;
980 if (!pKey->Active) { // mark as active key
981 pKey->Active = true;
982 pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();
983 *pKey->itSelf = itNoteOnEvent->Param.Note.Key;
984 }
985 if (itNewVoice->KeyGroup) {
986 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];
987 *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group
988 }
989 if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)
990 return itNewVoice; // success
991 }
992 }
993 else if (VoiceStealing) {
994 // try to steal one voice
995 int result = StealVoice(pEngineChannel, itNoteOnEvent);
996 if (!result) { // voice stolen successfully
997 // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died
998 RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();
999 if (itStealEvent) {
1000 *itStealEvent = *itNoteOnEvent; // copy event
1001 itStealEvent->Param.Note.Layer = iLayer;
1002 itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;
1003 pKey->VoiceTheftsQueued++;
1004 }
1005 else dmsg(1,("Voice stealing queue full!\n"));
1006 }
1007 }
1008
1009 return Pool<Voice>::Iterator(); // no free voice or error
1010 }
1011
1012 /**
1013 * Will be called by LaunchVoice() method in case there are no free
1014 * voices left. This method will select and kill one old voice for
1015 * voice stealing and postpone the note-on event until the selected
1016 * voice actually died.
1017 *
1018 * @param pEngineChannel - engine channel on which this event occured on
1019 * @param itNoteOnEvent - key, velocity and time stamp of the event
1020 * @returns 0 on success, a value < 0 if no active voice could be picked for voice stealing
1021 */
1022 int Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
1023 if (VoiceSpawnsLeft <= 0) {
1024 dmsg(1,("Max. voice thefts per audio fragment reached (you may raise CONFIG_MAX_VOICES).\n"));
1025 return -1;
1026 }
1027 if (!pEventPool->poolIsEmpty()) {
1028
1029 RTList<Voice>::Iterator itSelectedVoice;
1030
1031 // Select one voice for voice stealing
1032 switch (CONFIG_VOICE_STEAL_ALGO) {
1033
1034 // try to pick the oldest voice on the key where the new
1035 // voice should be spawned, if there is no voice on that
1036 // key, or no voice left to kill, then procceed with
1037 // 'oldestkey' algorithm
1038 case voice_steal_algo_oldestvoiceonkey: {
1039 midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
1040 itSelectedVoice = pSelectedKey->pActiveVoices->first();
1041 // proceed iterating if voice was created in this fragment cycle
1042 while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
1043 // if we haven't found a voice then proceed with algorithm 'oldestkey'
1044 if (itSelectedVoice && itSelectedVoice->IsStealable()) break;
1045 } // no break - intentional !
1046
1047 // try to pick the oldest voice on the oldest active key
1048 // from the same engine channel
1049 // (caution: must stay after 'oldestvoiceonkey' algorithm !)
1050 case voice_steal_algo_oldestkey: {
1051 // if we already stole in this fragment, try to proceed on same key
1052 if (this->itLastStolenVoice) {
1053 itSelectedVoice = this->itLastStolenVoice;
1054 do {
1055 ++itSelectedVoice;
1056 } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle
1057 // found a "stealable" voice ?
1058 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1059 // remember which voice we stole, so we can simply proceed on next voice stealing
1060 this->itLastStolenVoice = itSelectedVoice;
1061 break; // selection succeeded
1062 }
1063 }
1064 // get (next) oldest key
1065 RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKey) ? ++this->iuiLastStolenKey : pEngineChannel->pActiveKeys->first();
1066 while (iuiSelectedKey) {
1067 midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];
1068 itSelectedVoice = pSelectedKey->pActiveVoices->first();
1069 // proceed iterating if voice was created in this fragment cycle
1070 while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
1071 // found a "stealable" voice ?
1072 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1073 // remember which voice on which key we stole, so we can simply proceed on next voice stealing
1074 this->iuiLastStolenKey = iuiSelectedKey;
1075 this->itLastStolenVoice = itSelectedVoice;
1076 break; // selection succeeded
1077 }
1078 ++iuiSelectedKey; // get next oldest key
1079 }
1080 break;
1081 }
1082
1083 // don't steal anything
1084 case voice_steal_algo_none:
1085 default: {
1086 dmsg(1,("No free voice (voice stealing disabled)!\n"));
1087 return -1;
1088 }
1089 }
1090
1091 // if we couldn't steal a voice from the same engine channel then
1092 // steal oldest voice on the oldest key from any other engine channel
1093 // (the smaller engine channel number, the higher priority)
1094 if (!itSelectedVoice || !itSelectedVoice->IsStealable()) {
1095 EngineChannel* pSelectedChannel;
1096 int iChannelIndex;
1097 // select engine channel
1098 if (pLastStolenChannel) {
1099 pSelectedChannel = pLastStolenChannel;
1100 iChannelIndex = pSelectedChannel->iEngineIndexSelf;
1101 } else { // pick the engine channel followed by this engine channel
1102 iChannelIndex = (pEngineChannel->iEngineIndexSelf + 1) % engineChannels.size();
1103 pSelectedChannel = engineChannels[iChannelIndex];
1104 }
1105
1106 // if we already stole in this fragment, try to proceed on same key
1107 if (this->itLastStolenVoiceGlobally) {
1108 itSelectedVoice = this->itLastStolenVoiceGlobally;
1109 do {
1110 ++itSelectedVoice;
1111 } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle
1112 }
1113
1114 #if CONFIG_DEVMODE
1115 EngineChannel* pBegin = pSelectedChannel; // to detect endless loop
1116 #endif // CONFIG_DEVMODE
1117
1118 // did we find a 'stealable' voice?
1119 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1120 // remember which voice we stole, so we can simply proceed on next voice stealing
1121 this->itLastStolenVoiceGlobally = itSelectedVoice;
1122 } else while (true) { // iterate through engine channels
1123 // get (next) oldest key
1124 RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKeyGlobally) ? ++this->iuiLastStolenKeyGlobally : pSelectedChannel->pActiveKeys->first();
1125 this->iuiLastStolenKeyGlobally = RTList<uint>::Iterator(); // to prevent endless loop (see line above)
1126 while (iuiSelectedKey) {
1127 midi_key_info_t* pSelectedKey = &pSelectedChannel->pMIDIKeyInfo[*iuiSelectedKey];
1128 itSelectedVoice = pSelectedKey->pActiveVoices->first();
1129 // proceed iterating if voice was created in this fragment cycle
1130 while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
1131 // found a "stealable" voice ?
1132 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1133 // remember which voice on which key on which engine channel we stole, so we can simply proceed on next voice stealing
1134 this->iuiLastStolenKeyGlobally = iuiSelectedKey;
1135 this->itLastStolenVoiceGlobally = itSelectedVoice;
1136 this->pLastStolenChannel = pSelectedChannel;
1137 goto stealable_voice_found; // selection succeeded
1138 }
1139 ++iuiSelectedKey; // get next key on current engine channel
1140 }
1141 // get next engine channel
1142 iChannelIndex = (iChannelIndex + 1) % engineChannels.size();
1143 pSelectedChannel = engineChannels[iChannelIndex];
1144
1145 #if CONFIG_DEVMODE
1146 if (pSelectedChannel == pBegin) {
1147 dmsg(1,("FATAL ERROR: voice stealing endless loop!\n"));
1148 dmsg(1,("VoiceSpawnsLeft=%d.\n", VoiceSpawnsLeft));
1149 dmsg(1,("Exiting.\n"));
1150 exit(-1);
1151 }
1152 #endif // CONFIG_DEVMODE
1153 }
1154 }
1155
1156 // jump point if a 'stealable' voice was found
1157 stealable_voice_found:
1158
1159 #if CONFIG_DEVMODE
1160 if (!itSelectedVoice->IsActive()) {
1161 dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));
1162 return -1;
1163 }
1164 #endif // CONFIG_DEVMODE
1165
1166 // now kill the selected voice
1167 itSelectedVoice->Kill(itNoteOnEvent);
1168
1169 --VoiceSpawnsLeft;
1170
1171 return 0; // success
1172 }
1173 else {
1174 dmsg(1,("Event pool emtpy!\n"));
1175 return -1;
1176 }
1177 }
1178
1179 /**
1180 * Removes the given voice from the MIDI key's list of active voices.
1181 * This method will be called when a voice went inactive, e.g. because
1182 * it finished to playback its sample, finished its release stage or
1183 * just was killed.
1184 *
1185 * @param pEngineChannel - engine channel on which this event occured on
1186 * @param itVoice - points to the voice to be freed
1187 */
1188 void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) {
1189 if (itVoice) {
1190 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoice->MIDIKey];
1191
1192 uint keygroup = itVoice->KeyGroup;
1193
1194 // free the voice object
1195 pVoicePool->free(itVoice);
1196
1197 // if no other voices left and member of a key group, remove from key group
1198 if (pKey->pActiveVoices->isEmpty() && keygroup) {
1199 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[keygroup];
1200 if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group
1201 }
1202 }
1203 else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;
1204 }
1205
1206 /**
1207 * Called when there's no more voice left on a key, this call will
1208 * update the key info respectively.
1209 *
1210 * @param pEngineChannel - engine channel on which this event occured on
1211 * @param pKey - key which is now inactive
1212 */
1213 void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) {
1214 if (pKey->pActiveVoices->isEmpty()) {
1215 pKey->Active = false;
1216 pEngineChannel->pActiveKeys->free(pKey->itSelf); // remove key from list of active keys
1217 pKey->itSelf = RTList<uint>::Iterator();
1218 pKey->ReleaseTrigger = false;
1219 pKey->pEvents->clear();
1220 dmsg(3,("Key has no more voices now\n"));
1221 }
1222 else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n"));
1223 }
1224
1225 /**
1226 * Reacts on supported control change commands (e.g. pitch bend wheel,
1227 * modulation wheel, aftertouch).
1228 *
1229 * @param pEngineChannel - engine channel on which this event occured on
1230 * @param itControlChangeEvent - controller, value and time stamp of the event
1231 */
1232 void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) {
1233 dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
1234
1235 // update controller value in the engine channel's controller table
1236 pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
1237
1238 switch (itControlChangeEvent->Param.CC.Controller) {
1239 case 5: { // portamento time
1240 pEngineChannel->PortamentoTime = (float) itControlChangeEvent->Param.CC.Value / 127.0f * (float) CONFIG_PORTAMENTO_TIME_MAX + (float) CONFIG_PORTAMENTO_TIME_MIN;
1241 break;
1242 }
1243 case 7: { // volume
1244 //TODO: not sample accurate yet
1245 pEngineChannel->GlobalVolume = VolumeCurve[itControlChangeEvent->Param.CC.Value] * CONFIG_GLOBAL_ATTENUATION;
1246 pEngineChannel->bStatusChanged = true; // engine channel status has changed, so set notify flag
1247 break;
1248 }
1249 case 10: { // panpot
1250 //TODO: not sample accurate yet
1251 pEngineChannel->GlobalPanLeft = PanCurve[128 - itControlChangeEvent->Param.CC.Value];
1252 pEngineChannel->GlobalPanRight = PanCurve[itControlChangeEvent->Param.CC.Value];
1253 break;
1254 }
1255 case 64: { // sustain
1256 if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {
1257 dmsg(4,("DAMPER (RIGHT) PEDAL DOWN\n"));
1258 pEngineChannel->SustainPedal = true;
1259
1260 #if !CONFIG_PROCESS_MUTED_CHANNELS
1261 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1262 #endif
1263
1264 // cancel release process of voices if necessary
1265 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1266 for (; iuiKey; ++iuiKey) {
1267 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1268 if (!pKey->KeyPressed) {
1269 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1270 if (itNewEvent) {
1271 *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
1272 itNewEvent->Type = Event::type_cancel_release; // transform event type
1273 }
1274 else dmsg(1,("Event pool emtpy!\n"));
1275 }
1276 }
1277 }
1278 if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {
1279 dmsg(4,("DAMPER (RIGHT) PEDAL UP\n"));
1280 pEngineChannel->SustainPedal = false;
1281
1282 #if !CONFIG_PROCESS_MUTED_CHANNELS
1283 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1284 #endif
1285
1286 // release voices if their respective key is not pressed
1287 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1288 for (; iuiKey; ++iuiKey) {
1289 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1290 if (!pKey->KeyPressed && ShouldReleaseVoice(pEngineChannel, *iuiKey)) {
1291 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1292 if (itNewEvent) {
1293 *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
1294 itNewEvent->Type = Event::type_release; // transform event type
1295 }
1296 else dmsg(1,("Event pool emtpy!\n"));
1297 }
1298 }
1299 }
1300 break;
1301 }
1302 case 65: { // portamento on / off
1303 KillAllVoices(pEngineChannel, itControlChangeEvent);
1304 pEngineChannel->PortamentoMode = itControlChangeEvent->Param.CC.Value >= 64;
1305 break;
1306 }
1307 case 66: { // sostenuto
1308 if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SostenutoPedal) {
1309 dmsg(4,("SOSTENUTO (CENTER) PEDAL DOWN\n"));
1310 pEngineChannel->SostenutoPedal = true;
1311
1312 #if !CONFIG_PROCESS_MUTED_CHANNELS
1313 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1314 #endif
1315
1316 SostenutoKeyCount = 0;
1317 // Remeber the pressed keys
1318 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1319 for (; iuiKey; ++iuiKey) {
1320 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1321 if (pKey->KeyPressed && SostenutoKeyCount < 128) SostenutoKeys[SostenutoKeyCount++] = *iuiKey;
1322 }
1323 }
1324 if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SostenutoPedal) {
1325 dmsg(4,("SOSTENUTO (CENTER) PEDAL UP\n"));
1326 pEngineChannel->SostenutoPedal = false;
1327
1328 #if !CONFIG_PROCESS_MUTED_CHANNELS
1329 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1330 #endif
1331
1332 // release voices if the damper pedal is up and their respective key is not pressed
1333 for (int i = 0; i < SostenutoKeyCount; i++) {
1334 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[SostenutoKeys[i]];
1335 if (!pKey->KeyPressed && !pEngineChannel->SustainPedal) {
1336 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1337 if (itNewEvent) {
1338 *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
1339 itNewEvent->Type = Event::type_release; // transform event type
1340 }
1341 else dmsg(1,("Event pool emtpy!\n"));
1342 }
1343 }
1344 }
1345 break;
1346 }
1347
1348
1349 // Channel Mode Messages
1350
1351 case 120: { // all sound off
1352 KillAllVoices(pEngineChannel, itControlChangeEvent);
1353 break;
1354 }
1355 case 121: { // reset all controllers
1356 pEngineChannel->ResetControllers();
1357 break;
1358 }
1359 case 123: { // all notes off
1360 #if CONFIG_PROCESS_ALL_NOTES_OFF
1361 ReleaseAllVoices(pEngineChannel, itControlChangeEvent);
1362 #endif // CONFIG_PROCESS_ALL_NOTES_OFF
1363 break;
1364 }
1365 case 126: { // mono mode on
1366 KillAllVoices(pEngineChannel, itControlChangeEvent);
1367 pEngineChannel->SoloMode = true;
1368 break;
1369 }
1370 case 127: { // poly mode on
1371 KillAllVoices(pEngineChannel, itControlChangeEvent);
1372 pEngineChannel->SoloMode = false;
1373 break;
1374 }
1375 }
1376 }
1377
1378 /**
1379 * Reacts on MIDI system exclusive messages.
1380 *
1381 * @param itSysexEvent - sysex data size and time stamp of the sysex event
1382 */
1383 void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {
1384 RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader();
1385
1386 uint8_t exclusive_status, id;
1387 if (!reader.pop(&exclusive_status)) goto free_sysex_data;
1388 if (!reader.pop(&id)) goto free_sysex_data;
1389 if (exclusive_status != 0xF0) goto free_sysex_data;
1390
1391 switch (id) {
1392 case 0x41: { // Roland
1393 dmsg(3,("Roland Sysex\n"));
1394 uint8_t device_id, model_id, cmd_id;
1395 if (!reader.pop(&device_id)) goto free_sysex_data;
1396 if (!reader.pop(&model_id)) goto free_sysex_data;
1397 if (!reader.pop(&cmd_id)) goto free_sysex_data;
1398 if (model_id != 0x42 /*GS*/) goto free_sysex_data;
1399 if (cmd_id != 0x12 /*DT1*/) goto free_sysex_data;
1400
1401 // command address
1402 uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB)
1403 const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later
1404 if (reader.read(&addr[0], 3) != 3) goto free_sysex_data;
1405 if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters
1406 dmsg(3,("\tSystem Parameter\n"));
1407 }
1408 else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters
1409 dmsg(3,("\tCommon Parameter\n"));
1410 }
1411 else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)
1412 dmsg(3,("\tPart Parameter\n"));
1413 switch (addr[2]) {
1414 case 0x40: { // scale tuning
1415 dmsg(3,("\t\tScale Tuning\n"));
1416 uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave
1417 if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data;
1418 uint8_t checksum;
1419 if (!reader.pop(&checksum)) goto free_sysex_data;
1420 #if CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1421 if (GSCheckSum(checksum_reader, 12)) goto free_sysex_data;
1422 #endif // CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1423 for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;
1424 AdjustScale((int8_t*) scale_tunes);
1425 dmsg(3,("\t\t\tNew scale applied.\n"));
1426 break;
1427 }
1428 }
1429 }
1430 else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)
1431 }
1432 else if (addr[0] == 0x41) { // Drum Setup Parameters
1433 }
1434 break;
1435 }
1436 }
1437
1438 free_sysex_data: // finally free sysex data
1439 pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);
1440 }
1441
1442 /**
1443 * Calculates the Roland GS sysex check sum.
1444 *
1445 * @param AddrReader - reader which currently points to the first GS
1446 * command address byte of the GS sysex message in
1447 * question
1448 * @param DataSize - size of the GS message data (in bytes)
1449 */
1450 uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) {
1451 RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader;
1452 uint bytes = 3 /*addr*/ + DataSize;
1453 uint8_t addr_and_data[bytes];
1454 reader.read(&addr_and_data[0], bytes);
1455 uint8_t sum = 0;
1456 for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];
1457 return 128 - sum % 128;
1458 }
1459
1460 /**
1461 * Allows to tune each of the twelve semitones of an octave.
1462 *
1463 * @param ScaleTunes - detuning of all twelve semitones (in cents)
1464 */
1465 void Engine::AdjustScale(int8_t ScaleTunes[12]) {
1466 memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate
1467 }
1468
1469 /**
1470 * Releases all voices on an engine channel. All voices will go into
1471 * the release stage and thus it might take some time (e.g. dependant to
1472 * their envelope release time) until they actually die.
1473 *
1474 * @param pEngineChannel - engine channel on which all voices should be released
1475 * @param itReleaseEvent - event which caused this releasing of all voices
1476 */
1477 void Engine::ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent) {
1478 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1479 while (iuiKey) {
1480 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1481 ++iuiKey;
1482 // append a 'release' event to the key's own event list
1483 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1484 if (itNewEvent) {
1485 *itNewEvent = *itReleaseEvent; // copy original event (to the key's event list)
1486 itNewEvent->Type = Event::type_release; // transform event type
1487 }
1488 else dmsg(1,("Event pool emtpy!\n"));
1489 }
1490 }
1491
1492 /**
1493 * Kills all voices on an engine channel as soon as possible. Voices
1494 * won't get into release state, their volume level will be ramped down
1495 * as fast as possible.
1496 *
1497 * @param pEngineChannel - engine channel on which all voices should be killed
1498 * @param itKillEvent - event which caused this killing of all voices
1499 */
1500 void Engine::KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent) {
1501 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1502 RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
1503 while (iuiKey != end) { // iterate through all active keys
1504 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1505 ++iuiKey;
1506 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
1507 RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
1508 for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
1509 itVoice->Kill(itKillEvent);
1510 --VoiceSpawnsLeft; //FIXME: just a temporary workaround, we should check the cause in StealVoice() instead
1511 }
1512 }
1513 }
1514
1515 /**
1516 * Determines whether the specified voice should be released.
1517 *
1518 * @param pEngineChannel - The engine channel on which the voice should be checked
1519 * @param Key - The key number
1520 * @returns true if the specified should be released, false otherwise.
1521 */
1522 bool Engine::ShouldReleaseVoice(EngineChannel* pEngineChannel, int Key) {
1523 if (pEngineChannel->SustainPedal) return false;
1524
1525 if (pEngineChannel->SostenutoPedal) {
1526 for (int i = 0; i < SostenutoKeyCount; i++)
1527 if (Key == SostenutoKeys[i]) return false;
1528 }
1529
1530 return true;
1531 }
1532
1533 uint Engine::VoiceCount() {
1534 return ActiveVoiceCount;
1535 }
1536
1537 uint Engine::VoiceCountMax() {
1538 return ActiveVoiceCountMax;
1539 }
1540
1541 bool Engine::DiskStreamSupported() {
1542 return true;
1543 }
1544
1545 uint Engine::DiskStreamCount() {
1546 return (pDiskThread) ? pDiskThread->ActiveStreamCount : 0;
1547 }
1548
1549 uint Engine::DiskStreamCountMax() {
1550 return (pDiskThread) ? pDiskThread->ActiveStreamCountMax : 0;
1551 }
1552
1553 String Engine::DiskStreamBufferFillBytes() {
1554 return pDiskThread->GetBufferFillBytes();
1555 }
1556
1557 String Engine::DiskStreamBufferFillPercentage() {
1558 return pDiskThread->GetBufferFillPercentage();
1559 }
1560
1561 String Engine::EngineName() {
1562 return LS_GIG_ENGINE_NAME;
1563 }
1564
1565 String Engine::Description() {
1566 return "Gigasampler Engine";
1567 }
1568
1569 String Engine::Version() {
1570 String s = "$Revision: 1.61 $";
1571 return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
1572 }
1573
1574 // static constant initializers
1575 const float* Engine::VolumeCurve(InitVolumeCurve());
1576 const float* Engine::PanCurve(InitPanCurve());
1577 const float* Engine::CrossfadeCurve(InitCrossfadeCurve());
1578
1579 float* Engine::InitVolumeCurve() {
1580 // line-segment approximation
1581 const float segments[] = {
1582 0, 0, 2, 0.0046, 16, 0.016, 31, 0.051, 45, 0.115, 54.5, 0.2,
1583 64.5, 0.39, 74, 0.74, 92, 1.03, 114, 1.94, 119.2, 2.2, 127, 2.2
1584 };
1585 return InitCurve(segments);
1586 }
1587
1588 float* Engine::InitPanCurve() {
1589 // line-segment approximation
1590 const float segments[] = {
1591 0, 0, 1, 0,
1592 2, 0.05, 31.5, 0.7, 51, 0.851, 74.5, 1.12,
1593 127, 1.41, 128, 1.41
1594 };
1595 return InitCurve(segments, 129);
1596 }
1597
1598 float* Engine::InitCrossfadeCurve() {
1599 // line-segment approximation
1600 const float segments[] = {
1601 0, 0, 1, 0.03, 10, 0.1, 51, 0.58, 127, 1
1602 };
1603 return InitCurve(segments);
1604 }
1605
1606 float* Engine::InitCurve(const float* segments, int size) {
1607 float* y = new float[size];
1608 for (int x = 0 ; x < size ; x++) {
1609 if (x > segments[2]) segments += 2;
1610 y[x] = segments[1] + (x - segments[0]) *
1611 (segments[3] - segments[1]) / (segments[2] - segments[0]);
1612 }
1613 return y;
1614 }
1615
1616 }} // namespace LinuxSampler::gig

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