/[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 947 - (show annotations) (download)
Mon Nov 27 21:34:55 2006 UTC (17 years, 4 months ago) by schoenebeck
File size: 78037 byte(s)
* implemented MIDI instrument mapping according to latest LSCP draft

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 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>::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 cleanup on all engine channels for the next audio fragment
396 for (int i = 0; i < engineChannels.size(); i++) {
397 if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
398 PostProcess(engineChannels[i]);
399 }
400
401
402 // empty the engine's event list for the next audio fragment
403 ClearEventLists();
404
405 // reset voice stealing for the next audio fragment
406 pVoiceStealingQueue->clear();
407
408 // just some statistics about this engine instance
409 ActiveVoiceCount = ActiveVoiceCountTemp;
410 if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;
411
412 FrameTime += Samples;
413
414 return 0;
415 }
416
417 /**
418 * Dispatch and handle all events in this audio fragment for the given
419 * engine channel.
420 *
421 * @param pEngineChannel - engine channel on which events should be
422 * processed
423 * @param Samples - amount of sample points to be processed in
424 * this audio fragment cycle
425 */
426 void Engine::ProcessEvents(EngineChannel* pEngineChannel, uint Samples) {
427 // get all events from the engine channels's input event queue which belong to the current fragment
428 // (these are the common events like NoteOn, NoteOff, ControlChange, etc.)
429 pEngineChannel->ImportEvents(Samples);
430
431 // process events
432 {
433 RTList<Event>::Iterator itEvent = pEngineChannel->pEvents->first();
434 RTList<Event>::Iterator end = pEngineChannel->pEvents->end();
435 for (; itEvent != end; ++itEvent) {
436 switch (itEvent->Type) {
437 case Event::type_note_on:
438 dmsg(5,("Engine: Note on received\n"));
439 ProcessNoteOn((EngineChannel*)itEvent->pEngineChannel, itEvent);
440 break;
441 case Event::type_note_off:
442 dmsg(5,("Engine: Note off received\n"));
443 ProcessNoteOff((EngineChannel*)itEvent->pEngineChannel, itEvent);
444 break;
445 case Event::type_control_change:
446 dmsg(5,("Engine: MIDI CC received\n"));
447 ProcessControlChange((EngineChannel*)itEvent->pEngineChannel, itEvent);
448 break;
449 case Event::type_pitchbend:
450 dmsg(5,("Engine: Pitchbend received\n"));
451 ProcessPitchbend((EngineChannel*)itEvent->pEngineChannel, itEvent);
452 break;
453 }
454 }
455 }
456
457 // reset voice stealing for the next engine channel (or next audio fragment)
458 itLastStolenVoice = RTList<Voice>::Iterator();
459 itLastStolenVoiceGlobally = RTList<Voice>::Iterator();
460 iuiLastStolenKey = RTList<uint>::Iterator();
461 iuiLastStolenKeyGlobally = RTList<uint>::Iterator();
462 pLastStolenChannel = NULL;
463 }
464
465 /**
466 * Render all 'normal' voices (that is voices which were not stolen in
467 * this fragment) on the given engine channel.
468 *
469 * @param pEngineChannel - engine channel on which audio should be
470 * rendered
471 * @param Samples - amount of sample points to be rendered in
472 * this audio fragment cycle
473 */
474 void Engine::RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples) {
475 #if !CONFIG_PROCESS_MUTED_CHANNELS
476 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
477 #endif
478
479 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
480 RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
481 while (iuiKey != end) { // iterate through all active keys
482 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
483 ++iuiKey;
484
485 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
486 RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
487 for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
488 // now render current voice
489 itVoice->Render(Samples);
490 if (itVoice->IsActive()) ActiveVoiceCountTemp++; // still active
491 else { // voice reached end, is now inactive
492 FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices
493 }
494 }
495 }
496 }
497
498 /**
499 * Render all stolen voices (only voices which were stolen in this
500 * fragment) on the given engine channel. Stolen voices are rendered
501 * after all normal voices have been rendered; this is needed to render
502 * audio of those voices which were selected for voice stealing until
503 * the point were the stealing (that is the take over of the voice)
504 * actually happened.
505 *
506 * @param pEngineChannel - engine channel on which audio should be
507 * rendered
508 * @param Samples - amount of sample points to be rendered in
509 * this audio fragment cycle
510 */
511 void Engine::RenderStolenVoices(uint Samples) {
512 RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();
513 RTList<Event>::Iterator end = pVoiceStealingQueue->end();
514 for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {
515 EngineChannel* pEngineChannel = (EngineChannel*) itVoiceStealEvent->pEngineChannel;
516 Pool<Voice>::Iterator itNewVoice =
517 LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false, false);
518 if (itNewVoice) {
519 itNewVoice->Render(Samples);
520 if (itNewVoice->IsActive()) ActiveVoiceCountTemp++; // still active
521 else { // voice reached end, is now inactive
522 FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices
523 }
524 }
525 else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));
526
527 // we need to clear the key's event list explicitly here in case key was never active
528 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoiceStealEvent->Param.Note.Key];
529 pKey->VoiceTheftsQueued--;
530 if (!pKey->Active && !pKey->VoiceTheftsQueued) pKey->pEvents->clear();
531 }
532 }
533
534 /**
535 * Free all keys which have turned inactive in this audio fragment, from
536 * the list of active keys and clear all event lists on that engine
537 * channel.
538 *
539 * @param pEngineChannel - engine channel to cleanup
540 */
541 void Engine::PostProcess(EngineChannel* pEngineChannel) {
542 // free all keys which have no active voices left
543 {
544 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
545 RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
546 while (iuiKey != end) { // iterate through all active keys
547 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
548 ++iuiKey;
549 if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);
550 #if CONFIG_DEVMODE
551 else { // just a sanity check for debugging
552 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
553 RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
554 for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
555 if (itVoice->itKillEvent) {
556 dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));
557 }
558 }
559 }
560 #endif // CONFIG_DEVMODE
561 }
562 }
563
564 // empty the engine channel's own event lists
565 pEngineChannel->ClearEventLists();
566 }
567
568 /**
569 * Will be called by the MIDI input device whenever a MIDI system
570 * exclusive message has arrived.
571 *
572 * @param pData - pointer to sysex data
573 * @param Size - lenght of sysex data (in bytes)
574 */
575 void Engine::SendSysex(void* pData, uint Size) {
576 Event event = pEventGenerator->CreateEvent();
577 event.Type = Event::type_sysex;
578 event.Param.Sysex.Size = Size;
579 event.pEngineChannel = NULL; // as Engine global event
580 if (pEventQueue->write_space() > 0) {
581 if (pSysexBuffer->write_space() >= Size) {
582 // copy sysex data to input buffer
583 uint toWrite = Size;
584 uint8_t* pPos = (uint8_t*) pData;
585 while (toWrite) {
586 const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end());
587 pSysexBuffer->write(pPos, writeNow);
588 toWrite -= writeNow;
589 pPos += writeNow;
590
591 }
592 // finally place sysex event into input event queue
593 pEventQueue->push(&event);
594 }
595 else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,CONFIG_SYSEX_BUFFER_SIZE));
596 }
597 else dmsg(1,("Engine: Input event queue full!"));
598 }
599
600 /**
601 * Assigns and triggers a new voice for the respective MIDI key.
602 *
603 * @param pEngineChannel - engine channel on which this event occured on
604 * @param itNoteOnEvent - key, velocity and time stamp of the event
605 */
606 void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
607 #if !CONFIG_PROCESS_MUTED_CHANNELS
608 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
609 #endif
610
611 const int key = itNoteOnEvent->Param.Note.Key;
612 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];
613
614 // move note on event to the key's own event list
615 RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);
616
617 // if Solo Mode then kill all already active voices
618 if (pEngineChannel->SoloMode) {
619 Pool<uint>::Iterator itYoungestKey = pEngineChannel->pActiveKeys->last();
620 if (itYoungestKey) {
621 const int iYoungestKey = *itYoungestKey;
622 const midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[iYoungestKey];
623 if (pOtherKey->Active) {
624 // get final portamento position of currently active voice
625 if (pEngineChannel->PortamentoMode) {
626 RTList<Voice>::Iterator itVoice = pOtherKey->pActiveVoices->last();
627 if (itVoice) itVoice->UpdatePortamentoPos(itNoteOnEventOnKeyList);
628 }
629 // kill all voices on the (other) key
630 RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
631 RTList<Voice>::Iterator end = pOtherKey->pActiveVoices->end();
632 for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
633 if (itVoiceToBeKilled->Type != Voice::type_release_trigger)
634 itVoiceToBeKilled->Kill(itNoteOnEventOnKeyList);
635 }
636 }
637 }
638 // set this key as 'currently active solo key'
639 pEngineChannel->SoloKey = key;
640 }
641
642 // Change key dimension value if key is in keyswitching area
643 {
644 const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;
645 if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
646 pEngineChannel->CurrentKeyDimension = float(key - pInstrument->DimensionKeyRange.low) /
647 (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
648 }
649
650 pKey->KeyPressed = true; // the MIDI key was now pressed down
651 pKey->Velocity = itNoteOnEventOnKeyList->Param.Note.Velocity;
652 pKey->NoteOnTime = FrameTime + itNoteOnEventOnKeyList->FragmentPos(); // will be used to calculate note length
653
654 // cancel release process of voices on this key if needed
655 if (pKey->Active && !pEngineChannel->SustainPedal) {
656 RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();
657 if (itCancelReleaseEvent) {
658 *itCancelReleaseEvent = *itNoteOnEventOnKeyList; // copy event
659 itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type
660 }
661 else dmsg(1,("Event pool emtpy!\n"));
662 }
663
664 // allocate and trigger new voice(s) for the key
665 {
666 // first, get total amount of required voices (dependant on amount of layers)
667 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEventOnKeyList->Param.Note.Key);
668 if (pRegion) {
669 int voicesRequired = pRegion->Layers;
670 // now launch the required amount of voices
671 for (int i = 0; i < voicesRequired; i++)
672 LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, i, false, true, true);
673 }
674 }
675
676 // if neither a voice was spawned or postponed then remove note on event from key again
677 if (!pKey->Active && !pKey->VoiceTheftsQueued)
678 pKey->pEvents->free(itNoteOnEventOnKeyList);
679
680 if (!pEngineChannel->SoloMode || pEngineChannel->PortamentoPos < 0.0f) pEngineChannel->PortamentoPos = (float) key;
681 pKey->RoundRobinIndex++;
682 }
683
684 /**
685 * Releases the voices on the given key if sustain pedal is not pressed.
686 * If sustain is pressed, the release of the note will be postponed until
687 * sustain pedal will be released or voice turned inactive by itself (e.g.
688 * due to completion of sample playback).
689 *
690 * @param pEngineChannel - engine channel on which this event occured on
691 * @param itNoteOffEvent - key, velocity and time stamp of the event
692 */
693 void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {
694 #if !CONFIG_PROCESS_MUTED_CHANNELS
695 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
696 #endif
697
698 const int iKey = itNoteOffEvent->Param.Note.Key;
699 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[iKey];
700 pKey->KeyPressed = false; // the MIDI key was now released
701
702 // move event to the key's own event list
703 RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);
704
705 bool bShouldRelease = pKey->Active && ShouldReleaseVoice(pEngineChannel, itNoteOffEventOnKeyList->Param.Note.Key);
706
707 // in case Solo Mode is enabled, kill all voices on this key and respawn a voice on the highest pressed key (if any)
708 if (pEngineChannel->SoloMode) { //TODO: this feels like too much code just for handling solo mode :P
709 bool bOtherKeysPressed = false;
710 if (iKey == pEngineChannel->SoloKey) {
711 pEngineChannel->SoloKey = -1;
712 // if there's still a key pressed down, respawn a voice (group) on the highest key
713 for (int i = 127; i > 0; i--) {
714 midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[i];
715 if (pOtherKey->KeyPressed) {
716 bOtherKeysPressed = true;
717 // make the other key the new 'currently active solo key'
718 pEngineChannel->SoloKey = i;
719 // get final portamento position of currently active voice
720 if (pEngineChannel->PortamentoMode) {
721 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
722 if (itVoice) itVoice->UpdatePortamentoPos(itNoteOffEventOnKeyList);
723 }
724 // create a pseudo note on event
725 RTList<Event>::Iterator itPseudoNoteOnEvent = pOtherKey->pEvents->allocAppend();
726 if (itPseudoNoteOnEvent) {
727 // copy event
728 *itPseudoNoteOnEvent = *itNoteOffEventOnKeyList;
729 // transform event to a note on event
730 itPseudoNoteOnEvent->Type = Event::type_note_on;
731 itPseudoNoteOnEvent->Param.Note.Key = i;
732 itPseudoNoteOnEvent->Param.Note.Velocity = pOtherKey->Velocity;
733 // allocate and trigger new voice(s) for the other key
734 {
735 // first, get total amount of required voices (dependant on amount of layers)
736 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(i);
737 if (pRegion) {
738 int voicesRequired = pRegion->Layers;
739 // now launch the required amount of voices
740 for (int iLayer = 0; iLayer < voicesRequired; iLayer++)
741 LaunchVoice(pEngineChannel, itPseudoNoteOnEvent, iLayer, false, true, false);
742 }
743 }
744 // if neither a voice was spawned or postponed then remove note on event from key again
745 if (!pOtherKey->Active && !pOtherKey->VoiceTheftsQueued)
746 pOtherKey->pEvents->free(itPseudoNoteOnEvent);
747
748 } else dmsg(1,("Could not respawn voice, no free event left\n"));
749 break; // done
750 }
751 }
752 }
753 if (bOtherKeysPressed) {
754 if (pKey->Active) { // kill all voices on this key
755 bShouldRelease = false; // no need to release, as we kill it here
756 RTList<Voice>::Iterator itVoiceToBeKilled = pKey->pActiveVoices->first();
757 RTList<Voice>::Iterator end = pKey->pActiveVoices->end();
758 for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
759 if (itVoiceToBeKilled->Type != Voice::type_release_trigger)
760 itVoiceToBeKilled->Kill(itNoteOffEventOnKeyList);
761 }
762 }
763 } else pEngineChannel->PortamentoPos = -1.0f;
764 }
765
766 // if no solo mode (the usual case) or if solo mode and no other key pressed, then release voices on this key if needed
767 if (bShouldRelease) {
768 itNoteOffEventOnKeyList->Type = Event::type_release; // transform event type
769
770 // spawn release triggered voice(s) if needed
771 if (pKey->ReleaseTrigger) {
772 // first, get total amount of required voices (dependant on amount of layers)
773 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOffEventOnKeyList->Param.Note.Key);
774 if (pRegion) {
775 int voicesRequired = pRegion->Layers;
776
777 // MIDI note-on velocity is used instead of note-off velocity
778 itNoteOffEventOnKeyList->Param.Note.Velocity = pKey->Velocity;
779
780 // now launch the required amount of voices
781 for (int i = 0; i < voicesRequired; i++)
782 LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, i, true, false, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
783 }
784 pKey->ReleaseTrigger = false;
785 }
786 }
787
788 // if neither a voice was spawned or postponed on this key then remove note off event from key again
789 if (!pKey->Active && !pKey->VoiceTheftsQueued)
790 pKey->pEvents->free(itNoteOffEventOnKeyList);
791 }
792
793 /**
794 * Moves pitchbend event from the general (input) event list to the engine
795 * channel's event list. It will actually processed later by the
796 * respective voice.
797 *
798 * @param pEngineChannel - engine channel on which this event occured on
799 * @param itPitchbendEvent - absolute pitch value and time stamp of the event
800 */
801 void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) {
802 pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value
803 }
804
805 /**
806 * Allocates and triggers a new voice. This method will usually be
807 * called by the ProcessNoteOn() method and by the voices itself
808 * (e.g. to spawn further voices on the same key for layered sounds).
809 *
810 * @param pEngineChannel - engine channel on which this event occured on
811 * @param itNoteOnEvent - key, velocity and time stamp of the event
812 * @param iLayer - layer index for the new voice (optional - only
813 * in case of layered sounds of course)
814 * @param ReleaseTriggerVoice - if new voice is a release triggered voice
815 * (optional, default = false)
816 * @param VoiceStealing - if voice stealing should be performed
817 * when there is no free voice
818 * (optional, default = true)
819 * @param HandleKeyGroupConflicts - if voices should be killed due to a
820 * key group conflict
821 * @returns pointer to new voice or NULL if there was no free voice or
822 * if the voice wasn't triggered (for example when no region is
823 * defined for the given key).
824 */
825 Pool<Voice>::Iterator Engine::LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing, bool HandleKeyGroupConflicts) {
826 int MIDIKey = itNoteOnEvent->Param.Note.Key;
827 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[MIDIKey];
828 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(MIDIKey);
829
830 // if nothing defined for this key
831 if (!pRegion) return Pool<Voice>::Iterator(); // nothing to do
832
833 // only mark the first voice of a layered voice (group) to be in a
834 // key group, so the layered voices won't kill each other
835 int iKeyGroup = (iLayer == 0 && !ReleaseTriggerVoice) ? pRegion->KeyGroup : 0;
836
837 // handle key group (a.k.a. exclusive group) conflicts
838 if (HandleKeyGroupConflicts) {
839 if (iKeyGroup) { // if this voice / key belongs to a key group
840 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[iKeyGroup];
841 if (*ppKeyGroup) { // if there's already an active key in that key group
842 midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[**ppKeyGroup];
843 // kill all voices on the (other) key
844 RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
845 RTList<Voice>::Iterator end = pOtherKey->pActiveVoices->end();
846 for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
847 if (itVoiceToBeKilled->Type != Voice::type_release_trigger) {
848 itVoiceToBeKilled->Kill(itNoteOnEvent);
849 --VoiceSpawnsLeft; //FIXME: just a hack, we should better check in StealVoice() if the voice was killed due to key conflict
850 }
851 }
852 }
853 }
854 }
855
856 Voice::type_t VoiceType = Voice::type_normal;
857
858 // get current dimension values to select the right dimension region
859 //TODO: for stolen voices this dimension region selection block is processed twice, this should be changed
860 //FIXME: controller values for selecting the dimension region here are currently not sample accurate
861 uint DimValues[8] = { 0 };
862 for (int i = pRegion->Dimensions - 1; i >= 0; i--) {
863 switch (pRegion->pDimensionDefinitions[i].dimension) {
864 case ::gig::dimension_samplechannel:
865 DimValues[i] = 0; //TODO: we currently ignore this dimension
866 break;
867 case ::gig::dimension_layer:
868 DimValues[i] = iLayer;
869 break;
870 case ::gig::dimension_velocity:
871 DimValues[i] = itNoteOnEvent->Param.Note.Velocity;
872 break;
873 case ::gig::dimension_channelaftertouch:
874 DimValues[i] = pEngineChannel->ControllerTable[128];
875 break;
876 case ::gig::dimension_releasetrigger:
877 VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;
878 DimValues[i] = (uint) ReleaseTriggerVoice;
879 break;
880 case ::gig::dimension_keyboard:
881 DimValues[i] = (uint) (pEngineChannel->CurrentKeyDimension * pRegion->pDimensionDefinitions[i].zones);
882 break;
883 case ::gig::dimension_roundrobin:
884 DimValues[i] = (uint) pEngineChannel->pMIDIKeyInfo[MIDIKey].RoundRobinIndex; // incremented for each note on
885 break;
886 case ::gig::dimension_random:
887 RandomSeed = RandomSeed * 1103515245 + 12345; // classic pseudo random number generator
888 DimValues[i] = (uint) RandomSeed >> (32 - pRegion->pDimensionDefinitions[i].bits); // highest bits are most random
889 break;
890 case ::gig::dimension_modwheel:
891 DimValues[i] = pEngineChannel->ControllerTable[1];
892 break;
893 case ::gig::dimension_breath:
894 DimValues[i] = pEngineChannel->ControllerTable[2];
895 break;
896 case ::gig::dimension_foot:
897 DimValues[i] = pEngineChannel->ControllerTable[4];
898 break;
899 case ::gig::dimension_portamentotime:
900 DimValues[i] = pEngineChannel->ControllerTable[5];
901 break;
902 case ::gig::dimension_effect1:
903 DimValues[i] = pEngineChannel->ControllerTable[12];
904 break;
905 case ::gig::dimension_effect2:
906 DimValues[i] = pEngineChannel->ControllerTable[13];
907 break;
908 case ::gig::dimension_genpurpose1:
909 DimValues[i] = pEngineChannel->ControllerTable[16];
910 break;
911 case ::gig::dimension_genpurpose2:
912 DimValues[i] = pEngineChannel->ControllerTable[17];
913 break;
914 case ::gig::dimension_genpurpose3:
915 DimValues[i] = pEngineChannel->ControllerTable[18];
916 break;
917 case ::gig::dimension_genpurpose4:
918 DimValues[i] = pEngineChannel->ControllerTable[19];
919 break;
920 case ::gig::dimension_sustainpedal:
921 DimValues[i] = pEngineChannel->ControllerTable[64];
922 break;
923 case ::gig::dimension_portamento:
924 DimValues[i] = pEngineChannel->ControllerTable[65];
925 break;
926 case ::gig::dimension_sostenutopedal:
927 DimValues[i] = pEngineChannel->ControllerTable[66];
928 break;
929 case ::gig::dimension_softpedal:
930 DimValues[i] = pEngineChannel->ControllerTable[67];
931 break;
932 case ::gig::dimension_genpurpose5:
933 DimValues[i] = pEngineChannel->ControllerTable[80];
934 break;
935 case ::gig::dimension_genpurpose6:
936 DimValues[i] = pEngineChannel->ControllerTable[81];
937 break;
938 case ::gig::dimension_genpurpose7:
939 DimValues[i] = pEngineChannel->ControllerTable[82];
940 break;
941 case ::gig::dimension_genpurpose8:
942 DimValues[i] = pEngineChannel->ControllerTable[83];
943 break;
944 case ::gig::dimension_effect1depth:
945 DimValues[i] = pEngineChannel->ControllerTable[91];
946 break;
947 case ::gig::dimension_effect2depth:
948 DimValues[i] = pEngineChannel->ControllerTable[92];
949 break;
950 case ::gig::dimension_effect3depth:
951 DimValues[i] = pEngineChannel->ControllerTable[93];
952 break;
953 case ::gig::dimension_effect4depth:
954 DimValues[i] = pEngineChannel->ControllerTable[94];
955 break;
956 case ::gig::dimension_effect5depth:
957 DimValues[i] = pEngineChannel->ControllerTable[95];
958 break;
959 case ::gig::dimension_none:
960 std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;
961 break;
962 default:
963 std::cerr << "gig::Engine::LaunchVoice() Error: Unknown dimension\n" << std::flush;
964 }
965 }
966 ::gig::DimensionRegion* pDimRgn = pRegion->GetDimensionRegionByValue(DimValues);
967
968 // no need to continue if sample is silent
969 if (!pDimRgn->pSample || !pDimRgn->pSample->SamplesTotal) return Pool<Voice>::Iterator();
970
971 // allocate a new voice for the key
972 Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
973 if (itNewVoice) {
974 // launch the new voice
975 if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pDimRgn, VoiceType, iKeyGroup) < 0) {
976 dmsg(4,("Voice not triggered\n"));
977 pKey->pActiveVoices->free(itNewVoice);
978 }
979 else { // on success
980 --VoiceSpawnsLeft;
981 if (!pKey->Active) { // mark as active key
982 pKey->Active = true;
983 pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();
984 *pKey->itSelf = itNoteOnEvent->Param.Note.Key;
985 }
986 if (itNewVoice->KeyGroup) {
987 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];
988 *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group
989 }
990 if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)
991 return itNewVoice; // success
992 }
993 }
994 else if (VoiceStealing) {
995 // try to steal one voice
996 int result = StealVoice(pEngineChannel, itNoteOnEvent);
997 if (!result) { // voice stolen successfully
998 // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died
999 RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();
1000 if (itStealEvent) {
1001 *itStealEvent = *itNoteOnEvent; // copy event
1002 itStealEvent->Param.Note.Layer = iLayer;
1003 itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;
1004 pKey->VoiceTheftsQueued++;
1005 }
1006 else dmsg(1,("Voice stealing queue full!\n"));
1007 }
1008 }
1009
1010 return Pool<Voice>::Iterator(); // no free voice or error
1011 }
1012
1013 /**
1014 * Will be called by LaunchVoice() method in case there are no free
1015 * voices left. This method will select and kill one old voice for
1016 * voice stealing and postpone the note-on event until the selected
1017 * voice actually died.
1018 *
1019 * @param pEngineChannel - engine channel on which this event occured on
1020 * @param itNoteOnEvent - key, velocity and time stamp of the event
1021 * @returns 0 on success, a value < 0 if no active voice could be picked for voice stealing
1022 */
1023 int Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
1024 if (VoiceSpawnsLeft <= 0) {
1025 dmsg(1,("Max. voice thefts per audio fragment reached (you may raise CONFIG_MAX_VOICES).\n"));
1026 return -1;
1027 }
1028 if (!pEventPool->poolIsEmpty()) {
1029
1030 RTList<Voice>::Iterator itSelectedVoice;
1031
1032 // Select one voice for voice stealing
1033 switch (CONFIG_VOICE_STEAL_ALGO) {
1034
1035 // try to pick the oldest voice on the key where the new
1036 // voice should be spawned, if there is no voice on that
1037 // key, or no voice left to kill, then procceed with
1038 // 'oldestkey' algorithm
1039 case voice_steal_algo_oldestvoiceonkey: {
1040 midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
1041 itSelectedVoice = pSelectedKey->pActiveVoices->first();
1042 // proceed iterating if voice was created in this fragment cycle
1043 while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
1044 // if we haven't found a voice then proceed with algorithm 'oldestkey'
1045 if (itSelectedVoice && itSelectedVoice->IsStealable()) break;
1046 } // no break - intentional !
1047
1048 // try to pick the oldest voice on the oldest active key
1049 // from the same engine channel
1050 // (caution: must stay after 'oldestvoiceonkey' algorithm !)
1051 case voice_steal_algo_oldestkey: {
1052 // if we already stole in this fragment, try to proceed on same key
1053 if (this->itLastStolenVoice) {
1054 itSelectedVoice = this->itLastStolenVoice;
1055 do {
1056 ++itSelectedVoice;
1057 } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle
1058 // found a "stealable" voice ?
1059 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1060 // remember which voice we stole, so we can simply proceed on next voice stealing
1061 this->itLastStolenVoice = itSelectedVoice;
1062 break; // selection succeeded
1063 }
1064 }
1065 // get (next) oldest key
1066 RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKey) ? ++this->iuiLastStolenKey : pEngineChannel->pActiveKeys->first();
1067 while (iuiSelectedKey) {
1068 midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];
1069 itSelectedVoice = pSelectedKey->pActiveVoices->first();
1070 // proceed iterating if voice was created in this fragment cycle
1071 while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
1072 // found a "stealable" voice ?
1073 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1074 // remember which voice on which key we stole, so we can simply proceed on next voice stealing
1075 this->iuiLastStolenKey = iuiSelectedKey;
1076 this->itLastStolenVoice = itSelectedVoice;
1077 break; // selection succeeded
1078 }
1079 ++iuiSelectedKey; // get next oldest key
1080 }
1081 break;
1082 }
1083
1084 // don't steal anything
1085 case voice_steal_algo_none:
1086 default: {
1087 dmsg(1,("No free voice (voice stealing disabled)!\n"));
1088 return -1;
1089 }
1090 }
1091
1092 // if we couldn't steal a voice from the same engine channel then
1093 // steal oldest voice on the oldest key from any other engine channel
1094 // (the smaller engine channel number, the higher priority)
1095 if (!itSelectedVoice || !itSelectedVoice->IsStealable()) {
1096 EngineChannel* pSelectedChannel;
1097 int iChannelIndex;
1098 // select engine channel
1099 if (pLastStolenChannel) {
1100 pSelectedChannel = pLastStolenChannel;
1101 iChannelIndex = pSelectedChannel->iEngineIndexSelf;
1102 } else { // pick the engine channel followed by this engine channel
1103 iChannelIndex = (pEngineChannel->iEngineIndexSelf + 1) % engineChannels.size();
1104 pSelectedChannel = engineChannels[iChannelIndex];
1105 }
1106
1107 // if we already stole in this fragment, try to proceed on same key
1108 if (this->itLastStolenVoiceGlobally) {
1109 itSelectedVoice = this->itLastStolenVoiceGlobally;
1110 do {
1111 ++itSelectedVoice;
1112 } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle
1113 }
1114
1115 #if CONFIG_DEVMODE
1116 EngineChannel* pBegin = pSelectedChannel; // to detect endless loop
1117 #endif // CONFIG_DEVMODE
1118
1119 // did we find a 'stealable' voice?
1120 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1121 // remember which voice we stole, so we can simply proceed on next voice stealing
1122 this->itLastStolenVoiceGlobally = itSelectedVoice;
1123 } else while (true) { // iterate through engine channels
1124 // get (next) oldest key
1125 RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKeyGlobally) ? ++this->iuiLastStolenKeyGlobally : pSelectedChannel->pActiveKeys->first();
1126 this->iuiLastStolenKeyGlobally = RTList<uint>::Iterator(); // to prevent endless loop (see line above)
1127 while (iuiSelectedKey) {
1128 midi_key_info_t* pSelectedKey = &pSelectedChannel->pMIDIKeyInfo[*iuiSelectedKey];
1129 itSelectedVoice = pSelectedKey->pActiveVoices->first();
1130 // proceed iterating if voice was created in this fragment cycle
1131 while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
1132 // found a "stealable" voice ?
1133 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1134 // remember which voice on which key on which engine channel we stole, so we can simply proceed on next voice stealing
1135 this->iuiLastStolenKeyGlobally = iuiSelectedKey;
1136 this->itLastStolenVoiceGlobally = itSelectedVoice;
1137 this->pLastStolenChannel = pSelectedChannel;
1138 goto stealable_voice_found; // selection succeeded
1139 }
1140 ++iuiSelectedKey; // get next key on current engine channel
1141 }
1142 // get next engine channel
1143 iChannelIndex = (iChannelIndex + 1) % engineChannels.size();
1144 pSelectedChannel = engineChannels[iChannelIndex];
1145
1146 #if CONFIG_DEVMODE
1147 if (pSelectedChannel == pBegin) {
1148 dmsg(1,("FATAL ERROR: voice stealing endless loop!\n"));
1149 dmsg(1,("VoiceSpawnsLeft=%d.\n", VoiceSpawnsLeft));
1150 dmsg(1,("Exiting.\n"));
1151 exit(-1);
1152 }
1153 #endif // CONFIG_DEVMODE
1154 }
1155 }
1156
1157 // jump point if a 'stealable' voice was found
1158 stealable_voice_found:
1159
1160 #if CONFIG_DEVMODE
1161 if (!itSelectedVoice->IsActive()) {
1162 dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));
1163 return -1;
1164 }
1165 #endif // CONFIG_DEVMODE
1166
1167 // now kill the selected voice
1168 itSelectedVoice->Kill(itNoteOnEvent);
1169
1170 --VoiceSpawnsLeft;
1171
1172 return 0; // success
1173 }
1174 else {
1175 dmsg(1,("Event pool emtpy!\n"));
1176 return -1;
1177 }
1178 }
1179
1180 /**
1181 * Removes the given voice from the MIDI key's list of active voices.
1182 * This method will be called when a voice went inactive, e.g. because
1183 * it finished to playback its sample, finished its release stage or
1184 * just was killed.
1185 *
1186 * @param pEngineChannel - engine channel on which this event occured on
1187 * @param itVoice - points to the voice to be freed
1188 */
1189 void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) {
1190 if (itVoice) {
1191 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoice->MIDIKey];
1192
1193 uint keygroup = itVoice->KeyGroup;
1194
1195 // free the voice object
1196 pVoicePool->free(itVoice);
1197
1198 // if no other voices left and member of a key group, remove from key group
1199 if (pKey->pActiveVoices->isEmpty() && keygroup) {
1200 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[keygroup];
1201 if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group
1202 }
1203 }
1204 else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;
1205 }
1206
1207 /**
1208 * Called when there's no more voice left on a key, this call will
1209 * update the key info respectively.
1210 *
1211 * @param pEngineChannel - engine channel on which this event occured on
1212 * @param pKey - key which is now inactive
1213 */
1214 void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) {
1215 if (pKey->pActiveVoices->isEmpty()) {
1216 pKey->Active = false;
1217 pEngineChannel->pActiveKeys->free(pKey->itSelf); // remove key from list of active keys
1218 pKey->itSelf = RTList<uint>::Iterator();
1219 pKey->ReleaseTrigger = false;
1220 pKey->pEvents->clear();
1221 dmsg(3,("Key has no more voices now\n"));
1222 }
1223 else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n"));
1224 }
1225
1226 /**
1227 * Reacts on supported control change commands (e.g. pitch bend wheel,
1228 * modulation wheel, aftertouch).
1229 *
1230 * @param pEngineChannel - engine channel on which this event occured on
1231 * @param itControlChangeEvent - controller, value and time stamp of the event
1232 */
1233 void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) {
1234 dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
1235
1236 // update controller value in the engine channel's controller table
1237 pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
1238
1239 switch (itControlChangeEvent->Param.CC.Controller) {
1240 case 5: { // portamento time
1241 pEngineChannel->PortamentoTime = (float) itControlChangeEvent->Param.CC.Value / 127.0f * (float) CONFIG_PORTAMENTO_TIME_MAX + (float) CONFIG_PORTAMENTO_TIME_MIN;
1242 break;
1243 }
1244 case 7: { // volume
1245 //TODO: not sample accurate yet
1246 pEngineChannel->MidiVolume = VolumeCurve[itControlChangeEvent->Param.CC.Value];
1247 pEngineChannel->bStatusChanged = true; // engine channel status has changed, so set notify flag
1248 break;
1249 }
1250 case 10: { // panpot
1251 //TODO: not sample accurate yet
1252 pEngineChannel->GlobalPanLeft = PanCurve[128 - itControlChangeEvent->Param.CC.Value];
1253 pEngineChannel->GlobalPanRight = PanCurve[itControlChangeEvent->Param.CC.Value];
1254 break;
1255 }
1256 case 64: { // sustain
1257 if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {
1258 dmsg(4,("DAMPER (RIGHT) PEDAL DOWN\n"));
1259 pEngineChannel->SustainPedal = true;
1260
1261 #if !CONFIG_PROCESS_MUTED_CHANNELS
1262 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1263 #endif
1264
1265 // cancel release process of voices if necessary
1266 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1267 for (; iuiKey; ++iuiKey) {
1268 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1269 if (!pKey->KeyPressed) {
1270 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1271 if (itNewEvent) {
1272 *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
1273 itNewEvent->Type = Event::type_cancel_release; // transform event type
1274 }
1275 else dmsg(1,("Event pool emtpy!\n"));
1276 }
1277 }
1278 }
1279 if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {
1280 dmsg(4,("DAMPER (RIGHT) PEDAL UP\n"));
1281 pEngineChannel->SustainPedal = false;
1282
1283 #if !CONFIG_PROCESS_MUTED_CHANNELS
1284 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1285 #endif
1286
1287 // release voices if their respective key is not pressed
1288 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1289 for (; iuiKey; ++iuiKey) {
1290 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1291 if (!pKey->KeyPressed && ShouldReleaseVoice(pEngineChannel, *iuiKey)) {
1292 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1293 if (itNewEvent) {
1294 *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
1295 itNewEvent->Type = Event::type_release; // transform event type
1296 }
1297 else dmsg(1,("Event pool emtpy!\n"));
1298 }
1299 }
1300 }
1301 break;
1302 }
1303 case 65: { // portamento on / off
1304 KillAllVoices(pEngineChannel, itControlChangeEvent);
1305 pEngineChannel->PortamentoMode = itControlChangeEvent->Param.CC.Value >= 64;
1306 break;
1307 }
1308 case 66: { // sostenuto
1309 if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SostenutoPedal) {
1310 dmsg(4,("SOSTENUTO (CENTER) PEDAL DOWN\n"));
1311 pEngineChannel->SostenutoPedal = true;
1312
1313 #if !CONFIG_PROCESS_MUTED_CHANNELS
1314 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1315 #endif
1316
1317 SostenutoKeyCount = 0;
1318 // Remeber the pressed keys
1319 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1320 for (; iuiKey; ++iuiKey) {
1321 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1322 if (pKey->KeyPressed && SostenutoKeyCount < 128) SostenutoKeys[SostenutoKeyCount++] = *iuiKey;
1323 }
1324 }
1325 if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SostenutoPedal) {
1326 dmsg(4,("SOSTENUTO (CENTER) PEDAL UP\n"));
1327 pEngineChannel->SostenutoPedal = false;
1328
1329 #if !CONFIG_PROCESS_MUTED_CHANNELS
1330 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1331 #endif
1332
1333 // release voices if the damper pedal is up and their respective key is not pressed
1334 for (int i = 0; i < SostenutoKeyCount; i++) {
1335 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[SostenutoKeys[i]];
1336 if (!pKey->KeyPressed && !pEngineChannel->SustainPedal) {
1337 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1338 if (itNewEvent) {
1339 *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
1340 itNewEvent->Type = Event::type_release; // transform event type
1341 }
1342 else dmsg(1,("Event pool emtpy!\n"));
1343 }
1344 }
1345 }
1346 break;
1347 }
1348
1349
1350 // Channel Mode Messages
1351
1352 case 120: { // all sound off
1353 KillAllVoices(pEngineChannel, itControlChangeEvent);
1354 break;
1355 }
1356 case 121: { // reset all controllers
1357 pEngineChannel->ResetControllers();
1358 break;
1359 }
1360 case 123: { // all notes off
1361 #if CONFIG_PROCESS_ALL_NOTES_OFF
1362 ReleaseAllVoices(pEngineChannel, itControlChangeEvent);
1363 #endif // CONFIG_PROCESS_ALL_NOTES_OFF
1364 break;
1365 }
1366 case 126: { // mono mode on
1367 KillAllVoices(pEngineChannel, itControlChangeEvent);
1368 pEngineChannel->SoloMode = true;
1369 break;
1370 }
1371 case 127: { // poly mode on
1372 KillAllVoices(pEngineChannel, itControlChangeEvent);
1373 pEngineChannel->SoloMode = false;
1374 break;
1375 }
1376 }
1377 }
1378
1379 /**
1380 * Reacts on MIDI system exclusive messages.
1381 *
1382 * @param itSysexEvent - sysex data size and time stamp of the sysex event
1383 */
1384 void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {
1385 RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader();
1386
1387 uint8_t exclusive_status, id;
1388 if (!reader.pop(&exclusive_status)) goto free_sysex_data;
1389 if (!reader.pop(&id)) goto free_sysex_data;
1390 if (exclusive_status != 0xF0) goto free_sysex_data;
1391
1392 switch (id) {
1393 case 0x41: { // Roland
1394 dmsg(3,("Roland Sysex\n"));
1395 uint8_t device_id, model_id, cmd_id;
1396 if (!reader.pop(&device_id)) goto free_sysex_data;
1397 if (!reader.pop(&model_id)) goto free_sysex_data;
1398 if (!reader.pop(&cmd_id)) goto free_sysex_data;
1399 if (model_id != 0x42 /*GS*/) goto free_sysex_data;
1400 if (cmd_id != 0x12 /*DT1*/) goto free_sysex_data;
1401
1402 // command address
1403 uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB)
1404 const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later
1405 if (reader.read(&addr[0], 3) != 3) goto free_sysex_data;
1406 if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters
1407 dmsg(3,("\tSystem Parameter\n"));
1408 }
1409 else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters
1410 dmsg(3,("\tCommon Parameter\n"));
1411 }
1412 else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)
1413 dmsg(3,("\tPart Parameter\n"));
1414 switch (addr[2]) {
1415 case 0x40: { // scale tuning
1416 dmsg(3,("\t\tScale Tuning\n"));
1417 uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave
1418 if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data;
1419 uint8_t checksum;
1420 if (!reader.pop(&checksum)) goto free_sysex_data;
1421 #if CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1422 if (GSCheckSum(checksum_reader, 12)) goto free_sysex_data;
1423 #endif // CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1424 for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;
1425 AdjustScale((int8_t*) scale_tunes);
1426 dmsg(3,("\t\t\tNew scale applied.\n"));
1427 break;
1428 }
1429 }
1430 }
1431 else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)
1432 }
1433 else if (addr[0] == 0x41) { // Drum Setup Parameters
1434 }
1435 break;
1436 }
1437 }
1438
1439 free_sysex_data: // finally free sysex data
1440 pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);
1441 }
1442
1443 /**
1444 * Calculates the Roland GS sysex check sum.
1445 *
1446 * @param AddrReader - reader which currently points to the first GS
1447 * command address byte of the GS sysex message in
1448 * question
1449 * @param DataSize - size of the GS message data (in bytes)
1450 */
1451 uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) {
1452 RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader;
1453 uint bytes = 3 /*addr*/ + DataSize;
1454 uint8_t addr_and_data[bytes];
1455 reader.read(&addr_and_data[0], bytes);
1456 uint8_t sum = 0;
1457 for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];
1458 return 128 - sum % 128;
1459 }
1460
1461 /**
1462 * Allows to tune each of the twelve semitones of an octave.
1463 *
1464 * @param ScaleTunes - detuning of all twelve semitones (in cents)
1465 */
1466 void Engine::AdjustScale(int8_t ScaleTunes[12]) {
1467 memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate
1468 }
1469
1470 /**
1471 * Releases all voices on an engine channel. All voices will go into
1472 * the release stage and thus it might take some time (e.g. dependant to
1473 * their envelope release time) until they actually die.
1474 *
1475 * @param pEngineChannel - engine channel on which all voices should be released
1476 * @param itReleaseEvent - event which caused this releasing of all voices
1477 */
1478 void Engine::ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent) {
1479 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1480 while (iuiKey) {
1481 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1482 ++iuiKey;
1483 // append a 'release' event to the key's own event list
1484 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1485 if (itNewEvent) {
1486 *itNewEvent = *itReleaseEvent; // copy original event (to the key's event list)
1487 itNewEvent->Type = Event::type_release; // transform event type
1488 }
1489 else dmsg(1,("Event pool emtpy!\n"));
1490 }
1491 }
1492
1493 /**
1494 * Kills all voices on an engine channel as soon as possible. Voices
1495 * won't get into release state, their volume level will be ramped down
1496 * as fast as possible.
1497 *
1498 * @param pEngineChannel - engine channel on which all voices should be killed
1499 * @param itKillEvent - event which caused this killing of all voices
1500 */
1501 void Engine::KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent) {
1502 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1503 RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
1504 while (iuiKey != end) { // iterate through all active keys
1505 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1506 ++iuiKey;
1507 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
1508 RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
1509 for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
1510 itVoice->Kill(itKillEvent);
1511 --VoiceSpawnsLeft; //FIXME: just a temporary workaround, we should check the cause in StealVoice() instead
1512 }
1513 }
1514 }
1515
1516 /**
1517 * Determines whether the specified voice should be released.
1518 *
1519 * @param pEngineChannel - The engine channel on which the voice should be checked
1520 * @param Key - The key number
1521 * @returns true if the specified should be released, false otherwise.
1522 */
1523 bool Engine::ShouldReleaseVoice(EngineChannel* pEngineChannel, int Key) {
1524 if (pEngineChannel->SustainPedal) return false;
1525
1526 if (pEngineChannel->SostenutoPedal) {
1527 for (int i = 0; i < SostenutoKeyCount; i++)
1528 if (Key == SostenutoKeys[i]) return false;
1529 }
1530
1531 return true;
1532 }
1533
1534 uint Engine::VoiceCount() {
1535 return ActiveVoiceCount;
1536 }
1537
1538 uint Engine::VoiceCountMax() {
1539 return ActiveVoiceCountMax;
1540 }
1541
1542 bool Engine::DiskStreamSupported() {
1543 return true;
1544 }
1545
1546 uint Engine::DiskStreamCount() {
1547 return (pDiskThread) ? pDiskThread->ActiveStreamCount : 0;
1548 }
1549
1550 uint Engine::DiskStreamCountMax() {
1551 return (pDiskThread) ? pDiskThread->ActiveStreamCountMax : 0;
1552 }
1553
1554 String Engine::DiskStreamBufferFillBytes() {
1555 return pDiskThread->GetBufferFillBytes();
1556 }
1557
1558 String Engine::DiskStreamBufferFillPercentage() {
1559 return pDiskThread->GetBufferFillPercentage();
1560 }
1561
1562 String Engine::EngineName() {
1563 return LS_GIG_ENGINE_NAME;
1564 }
1565
1566 String Engine::Description() {
1567 return "Gigasampler Engine";
1568 }
1569
1570 String Engine::Version() {
1571 String s = "$Revision: 1.66 $";
1572 return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
1573 }
1574
1575 InstrumentManager* Engine::GetInstrumentManager() {
1576 return &instruments;
1577 }
1578
1579 // static constant initializers
1580 const float* Engine::VolumeCurve(InitVolumeCurve());
1581 const float* Engine::PanCurve(InitPanCurve());
1582 const float* Engine::CrossfadeCurve(InitCrossfadeCurve());
1583
1584 float* Engine::InitVolumeCurve() {
1585 // line-segment approximation
1586 const float segments[] = {
1587 0, 0, 2, 0.0046, 16, 0.016, 31, 0.051, 45, 0.115, 54.5, 0.2,
1588 64.5, 0.39, 74, 0.74, 92, 1.03, 114, 1.94, 119.2, 2.2, 127, 2.2
1589 };
1590 return InitCurve(segments);
1591 }
1592
1593 float* Engine::InitPanCurve() {
1594 // line-segment approximation
1595 const float segments[] = {
1596 0, 0, 1, 0,
1597 2, 0.05, 31.5, 0.7, 51, 0.851, 74.5, 1.12,
1598 127, 1.41, 128, 1.41
1599 };
1600 return InitCurve(segments, 129);
1601 }
1602
1603 float* Engine::InitCrossfadeCurve() {
1604 // line-segment approximation
1605 const float segments[] = {
1606 0, 0, 1, 0.03, 10, 0.1, 51, 0.58, 127, 1
1607 };
1608 return InitCurve(segments);
1609 }
1610
1611 float* Engine::InitCurve(const float* segments, int size) {
1612 float* y = new float[size];
1613 for (int x = 0 ; x < size ; x++) {
1614 if (x > segments[2]) segments += 2;
1615 y[x] = segments[1] + (x - segments[0]) *
1616 (segments[3] - segments[1]) / (segments[2] - segments[0]);
1617 }
1618 return y;
1619 }
1620
1621 }} // namespace LinuxSampler::gig

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