/[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 690 - (show annotations) (download)
Fri Jul 15 16:43:56 2005 UTC (15 years, 2 months ago) by schoenebeck
File size: 68141 byte(s)
just to clearify that the previous change refers to voice stealing

1 /***************************************************************************
2 * *
3 * LinuxSampler - modular, streaming capable sampler *
4 * *
5 * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6 * Copyright (C) 2005 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 #if defined(__APPLE__)
33 # include <stdlib.h>
34 #else
35 # include <malloc.h>
36 #endif
37
38 namespace LinuxSampler { namespace gig {
39
40 InstrumentResourceManager Engine::instruments;
41
42 std::map<AudioOutputDevice*,Engine*> Engine::engines;
43
44 /**
45 * Get a gig::Engine object for the given gig::EngineChannel and the
46 * given AudioOutputDevice. All engine channels which are connected to
47 * the same audio output device will use the same engine instance. This
48 * method will be called by a gig::EngineChannel whenever it's
49 * connecting to a audio output device.
50 *
51 * @param pChannel - engine channel which acquires an engine object
52 * @param pDevice - the audio output device \a pChannel is connected to
53 */
54 Engine* Engine::AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {
55 Engine* pEngine = NULL;
56 // check if there's already an engine for the given audio output device
57 if (engines.count(pDevice)) {
58 dmsg(4,("Using existing gig::Engine.\n"));
59 pEngine = engines[pDevice];
60 } else { // create a new engine (and disk thread) instance for the given audio output device
61 dmsg(4,("Creating new gig::Engine.\n"));
62 pEngine = (Engine*) EngineFactory::Create("gig");
63 pEngine->Connect(pDevice);
64 engines[pDevice] = pEngine;
65 }
66 // register engine channel to the engine instance
67 pEngine->engineChannels.add(pChannel);
68 // remember index in the ArrayList
69 pChannel->iEngineIndexSelf = pEngine->engineChannels.size() - 1;
70 dmsg(4,("This gig::Engine has now %d EngineChannels.\n",pEngine->engineChannels.size()));
71 return pEngine;
72 }
73
74 /**
75 * Once an engine channel is disconnected from an audio output device,
76 * it wil immediately call this method to unregister itself from the
77 * engine instance and if that engine instance is not used by any other
78 * engine channel anymore, then that engine instance will be destroyed.
79 *
80 * @param pChannel - engine channel which wants to disconnect from it's
81 * engine instance
82 * @param pDevice - audio output device \a pChannel was connected to
83 */
84 void Engine::FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {
85 dmsg(4,("Disconnecting EngineChannel from gig::Engine.\n"));
86 Engine* pEngine = engines[pDevice];
87 // unregister EngineChannel from the Engine instance
88 pEngine->engineChannels.remove(pChannel);
89 // if the used Engine instance is not used anymore, then destroy it
90 if (pEngine->engineChannels.empty()) {
91 pDevice->Disconnect(pEngine);
92 engines.erase(pDevice);
93 delete pEngine;
94 dmsg(4,("Destroying gig::Engine.\n"));
95 }
96 else dmsg(4,("This gig::Engine has now %d EngineChannels.\n",pEngine->engineChannels.size()));
97 }
98
99 /**
100 * Constructor
101 */
102 Engine::Engine() {
103 pAudioOutputDevice = NULL;
104 pDiskThread = NULL;
105 pEventGenerator = NULL;
106 pSysexBuffer = new RingBuffer<uint8_t>(CONFIG_SYSEX_BUFFER_SIZE, 0);
107 pEventQueue = new RingBuffer<Event>(CONFIG_MAX_EVENTS_PER_FRAGMENT, 0);
108 pEventPool = new Pool<Event>(CONFIG_MAX_EVENTS_PER_FRAGMENT);
109 pVoicePool = new Pool<Voice>(CONFIG_MAX_VOICES);
110 pVoiceStealingQueue = new RTList<Event>(pEventPool);
111 pGlobalEvents = new RTList<Event>(pEventPool);
112 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
113 iterVoice->SetEngine(this);
114 }
115 pVoicePool->clear();
116
117 pSynthesisParameters[0] = NULL; // we allocate when an audio device is connected
118 pBasicFilterParameters = NULL;
119 pMainFilterParameters = NULL;
120
121 ResetInternal();
122 ResetScaleTuning();
123 }
124
125 /**
126 * Destructor
127 */
128 Engine::~Engine() {
129 if (pDiskThread) {
130 dmsg(1,("Stopping disk thread..."));
131 pDiskThread->StopThread();
132 delete pDiskThread;
133 dmsg(1,("OK\n"));
134 }
135 if (pEventQueue) delete pEventQueue;
136 if (pEventPool) delete pEventPool;
137 if (pVoicePool) {
138 pVoicePool->clear();
139 delete pVoicePool;
140 }
141 if (pEventGenerator) delete pEventGenerator;
142 if (pMainFilterParameters) delete[] pMainFilterParameters;
143 if (pBasicFilterParameters) delete[] pBasicFilterParameters;
144 if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
145 if (pVoiceStealingQueue) delete pVoiceStealingQueue;
146 if (pSysexBuffer) delete pSysexBuffer;
147 EngineFactory::Destroy(this);
148 }
149
150 void Engine::Enable() {
151 dmsg(3,("gig::Engine: enabling\n"));
152 EngineDisabled.PushAndUnlock(false, 2); // set condition object 'EngineDisabled' to false (wait max. 2s)
153 dmsg(3,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe()));
154 }
155
156 void Engine::Disable() {
157 dmsg(3,("gig::Engine: disabling\n"));
158 bool* pWasDisabled = EngineDisabled.PushAndUnlock(true, 2); // wait max. 2s
159 if (!pWasDisabled) dmsg(3,("gig::Engine warning: Timeout waiting to disable engine.\n"));
160 }
161
162 void Engine::DisableAndLock() {
163 dmsg(3,("gig::Engine: disabling\n"));
164 bool* pWasDisabled = EngineDisabled.Push(true, 2); // wait max. 2s
165 if (!pWasDisabled) dmsg(3,("gig::Engine warning: Timeout waiting to disable engine.\n"));
166 }
167
168 /**
169 * Reset all voices and disk thread and clear input event queue and all
170 * control and status variables.
171 */
172 void Engine::Reset() {
173 DisableAndLock();
174 ResetInternal();
175 ResetScaleTuning();
176 Enable();
177 }
178
179 /**
180 * Reset all voices and disk thread and clear input event queue and all
181 * control and status variables. This method is not thread safe!
182 */
183 void Engine::ResetInternal() {
184 ActiveVoiceCount = 0;
185 ActiveVoiceCountMax = 0;
186
187 // reset voice stealing parameters
188 pVoiceStealingQueue->clear();
189 itLastStolenVoice = RTList<Voice>::Iterator();
190 itLastStolenVoiceGlobally = RTList<Voice>::Iterator();
191 iuiLastStolenKey = RTList<uint>::Iterator();
192 iuiLastStolenKeyGlobally = RTList<uint>::Iterator();
193 pLastStolenChannel = NULL;
194
195 // reset all voices
196 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
197 iterVoice->Reset();
198 }
199 pVoicePool->clear();
200
201 // reset disk thread
202 if (pDiskThread) pDiskThread->Reset();
203
204 // delete all input events
205 pEventQueue->init();
206 }
207
208 /**
209 * Reset to normal, chromatic scale (means equal tempered).
210 */
211 void Engine::ResetScaleTuning() {
212 memset(&ScaleTuning[0], 0x00, 12);
213 }
214
215 /**
216 * Connect this engine instance with the given audio output device.
217 * This method will be called when an Engine instance is created.
218 * All of the engine's data structures which are dependant to the used
219 * audio output device / driver will be (re)allocated and / or
220 * adjusted appropriately.
221 *
222 * @param pAudioOut - audio output device to connect to
223 */
224 void Engine::Connect(AudioOutputDevice* pAudioOut) {
225 pAudioOutputDevice = pAudioOut;
226
227 ResetInternal();
228
229 // inform audio driver for the need of two channels
230 try {
231 pAudioOutputDevice->AcquireChannels(2); // gig engine only stereo
232 }
233 catch (AudioOutputException e) {
234 String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message();
235 throw LinuxSamplerException(msg);
236 }
237
238 this->MaxSamplesPerCycle = pAudioOutputDevice->MaxSamplesPerCycle();
239 this->SampleRate = pAudioOutputDevice->SampleRate();
240
241 // FIXME: audio drivers with varying fragment sizes might be a problem here
242 MaxFadeOutPos = MaxSamplesPerCycle - int(double(SampleRate) * CONFIG_EG_MIN_RELEASE_TIME) - 1;
243 if (MaxFadeOutPos < 0) {
244 std::cerr << "gig::Engine: WARNING, CONFIG_EG_MIN_RELEASE_TIME "
245 << "too big for current audio fragment size & sampling rate! "
246 << "May lead to click sounds if voice stealing chimes in!\n" << std::flush;
247 // force volume ramp downs at the beginning of each fragment
248 MaxFadeOutPos = 0;
249 // lower minimum release time
250 const float minReleaseTime = (float) MaxSamplesPerCycle / (float) SampleRate;
251 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
252 iterVoice->pEG1->CalculateFadeOutCoeff(minReleaseTime, SampleRate);
253 }
254 pVoicePool->clear();
255 }
256
257 // (re)create disk thread
258 if (this->pDiskThread) {
259 dmsg(1,("Stopping disk thread..."));
260 this->pDiskThread->StopThread();
261 delete this->pDiskThread;
262 dmsg(1,("OK\n"));
263 }
264 this->pDiskThread = new DiskThread(((pAudioOut->MaxSamplesPerCycle() << CONFIG_MAX_PITCH) << 1) + 6); //FIXME: assuming stereo
265 if (!pDiskThread) {
266 dmsg(0,("gig::Engine new diskthread = NULL\n"));
267 exit(EXIT_FAILURE);
268 }
269
270 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
271 iterVoice->pDiskThread = this->pDiskThread;
272 dmsg(3,("d"));
273 }
274 pVoicePool->clear();
275
276 // (re)create event generator
277 if (pEventGenerator) delete pEventGenerator;
278 pEventGenerator = new EventGenerator(pAudioOut->SampleRate());
279
280 // (re)allocate synthesis parameter matrix
281 if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
282
283 #if defined(__APPLE__)
284 pSynthesisParameters[0] = (float *) malloc(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle());
285 #else
286 pSynthesisParameters[0] = (float *) memalign(16,(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle()));
287 #endif
288 for (int dst = 1; dst < Event::destination_count; dst++)
289 pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();
290
291 // (re)allocate biquad filter parameter sequence
292 if (pBasicFilterParameters) delete[] pBasicFilterParameters;
293 if (pMainFilterParameters) delete[] pMainFilterParameters;
294 pBasicFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];
295 pMainFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];
296
297 dmsg(1,("Starting disk thread..."));
298 pDiskThread->StartThread();
299 dmsg(1,("OK\n"));
300
301 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
302 if (!iterVoice->pDiskThread) {
303 dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));
304 exit(EXIT_FAILURE);
305 }
306 }
307 }
308
309 /**
310 * Clear all engine global event lists.
311 */
312 void Engine::ClearEventLists() {
313 pGlobalEvents->clear();
314 }
315
316 /**
317 * Copy all events from the engine's global input queue buffer to the
318 * engine's internal event list. This will be done at the beginning of
319 * each audio cycle (that is each RenderAudio() call) to distinguish
320 * all global events which have to be processed in the current audio
321 * cycle. These events are usually just SysEx messages. Every
322 * EngineChannel has it's own input event queue buffer and event list
323 * to handle common events like NoteOn, NoteOff and ControlChange
324 * events.
325 *
326 * @param Samples - number of sample points to be processed in the
327 * current audio cycle
328 */
329 void Engine::ImportEvents(uint Samples) {
330 RingBuffer<Event>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader();
331 Event* pEvent;
332 while (true) {
333 // get next event from input event queue
334 if (!(pEvent = eventQueueReader.pop())) break;
335 // if younger event reached, ignore that and all subsequent ones for now
336 if (pEvent->FragmentPos() >= Samples) {
337 eventQueueReader--;
338 dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples));
339 pEvent->ResetFragmentPos();
340 break;
341 }
342 // copy event to internal event list
343 if (pGlobalEvents->poolIsEmpty()) {
344 dmsg(1,("Event pool emtpy!\n"));
345 break;
346 }
347 *pGlobalEvents->allocAppend() = *pEvent;
348 }
349 eventQueueReader.free(); // free all copied events from input queue
350 }
351
352 /**
353 * Let this engine proceed to render the given amount of sample points. The
354 * calculated audio data of all voices of this engine will be placed into
355 * the engine's audio sum buffer which has to be copied and eventually be
356 * converted to the appropriate value range by the audio output class (e.g.
357 * AlsaIO or JackIO) right after.
358 *
359 * @param Samples - number of sample points to be rendered
360 * @returns 0 on success
361 */
362 int Engine::RenderAudio(uint Samples) {
363 dmsg(5,("RenderAudio(Samples=%d)\n", Samples));
364
365 // return if engine disabled
366 if (EngineDisabled.Pop()) {
367 dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));
368 return 0;
369 }
370
371 // update time of start and end of this audio fragment (as events' time stamps relate to this)
372 pEventGenerator->UpdateFragmentTime(Samples);
373
374 // We only allow a maximum of CONFIG_MAX_VOICES voices to be spawned
375 // in each audio fragment. All subsequent request for spawning new
376 // voices in the same audio fragment will be ignored.
377 VoiceSpawnsLeft = CONFIG_MAX_VOICES;
378
379 // get all events from the engine's global input event queue which belong to the current fragment
380 // (these are usually just SysEx messages)
381 ImportEvents(Samples);
382
383 // process engine global events (these are currently only MIDI System Exclusive messages)
384 {
385 RTList<Event>::Iterator itEvent = pGlobalEvents->first();
386 RTList<Event>::Iterator end = pGlobalEvents->end();
387 for (; itEvent != end; ++itEvent) {
388 switch (itEvent->Type) {
389 case Event::type_sysex:
390 dmsg(5,("Engine: Sysex received\n"));
391 ProcessSysex(itEvent);
392 break;
393 }
394 }
395 }
396
397 // reset internal voice counter (just for statistic of active voices)
398 ActiveVoiceCountTemp = 0;
399
400 // handle events on all engine channels
401 for (int i = 0; i < engineChannels.size(); i++) {
402 if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
403 ProcessEvents(engineChannels[i], Samples);
404 }
405
406 // render all 'normal', active voices on all engine channels
407 for (int i = 0; i < engineChannels.size(); i++) {
408 if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
409 RenderActiveVoices(engineChannels[i], Samples);
410 }
411
412 // now that all ordinary voices on ALL engine channels are rendered, render new stolen voices
413 RenderStolenVoices(Samples);
414
415 // handle cleanup on all engine channels for the next audio fragment
416 for (int i = 0; i < engineChannels.size(); i++) {
417 if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
418 PostProcess(engineChannels[i]);
419 }
420
421
422 // empty the engine's event list for the next audio fragment
423 ClearEventLists();
424
425 // reset voice stealing for the next audio fragment
426 pVoiceStealingQueue->clear();
427
428 // just some statistics about this engine instance
429 ActiveVoiceCount = ActiveVoiceCountTemp;
430 if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;
431
432 FrameTime += Samples;
433
434 return 0;
435 }
436
437 /**
438 * Dispatch and handle all events in this audio fragment for the given
439 * engine channel.
440 *
441 * @param pEngineChannel - engine channel on which events should be
442 * processed
443 * @param Samples - amount of sample points to be processed in
444 * this audio fragment cycle
445 */
446 void Engine::ProcessEvents(EngineChannel* pEngineChannel, uint Samples) {
447 // get all events from the engine channels's input event queue which belong to the current fragment
448 // (these are the common events like NoteOn, NoteOff, ControlChange, etc.)
449 pEngineChannel->ImportEvents(Samples);
450
451 // process events
452 {
453 RTList<Event>::Iterator itEvent = pEngineChannel->pEvents->first();
454 RTList<Event>::Iterator end = pEngineChannel->pEvents->end();
455 for (; itEvent != end; ++itEvent) {
456 switch (itEvent->Type) {
457 case Event::type_note_on:
458 dmsg(5,("Engine: Note on received\n"));
459 ProcessNoteOn((EngineChannel*)itEvent->pEngineChannel, itEvent);
460 break;
461 case Event::type_note_off:
462 dmsg(5,("Engine: Note off received\n"));
463 ProcessNoteOff((EngineChannel*)itEvent->pEngineChannel, itEvent);
464 break;
465 case Event::type_control_change:
466 dmsg(5,("Engine: MIDI CC received\n"));
467 ProcessControlChange((EngineChannel*)itEvent->pEngineChannel, itEvent);
468 break;
469 case Event::type_pitchbend:
470 dmsg(5,("Engine: Pitchbend received\n"));
471 ProcessPitchbend((EngineChannel*)itEvent->pEngineChannel, itEvent);
472 break;
473 }
474 }
475 }
476
477 // reset voice stealing for the next engine channel (or next audio fragment)
478 itLastStolenVoice = RTList<Voice>::Iterator();
479 itLastStolenVoiceGlobally = RTList<Voice>::Iterator();
480 iuiLastStolenKey = RTList<uint>::Iterator();
481 iuiLastStolenKeyGlobally = RTList<uint>::Iterator();
482 pLastStolenChannel = NULL;
483 }
484
485 /**
486 * Render all 'normal' voices (that is voices which were not stolen in
487 * this fragment) on the given engine channel.
488 *
489 * @param pEngineChannel - engine channel on which audio should be
490 * rendered
491 * @param Samples - amount of sample points to be rendered in
492 * this audio fragment cycle
493 */
494 void Engine::RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples) {
495 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
496 RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
497 while (iuiKey != end) { // iterate through all active keys
498 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
499 ++iuiKey;
500
501 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
502 RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
503 for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
504 // now render current voice
505 itVoice->Render(Samples);
506 if (itVoice->IsActive()) ActiveVoiceCountTemp++; // still active
507 else { // voice reached end, is now inactive
508 FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices
509 }
510 }
511 }
512 }
513
514 /**
515 * Render all stolen voices (only voices which were stolen in this
516 * fragment) on the given engine channel. Stolen voices are rendered
517 * after all normal voices have been rendered; this is needed to render
518 * audio of those voices which were selected for voice stealing until
519 * the point were the stealing (that is the take over of the voice)
520 * actually happened.
521 *
522 * @param pEngineChannel - engine channel on which audio should be
523 * rendered
524 * @param Samples - amount of sample points to be rendered in
525 * this audio fragment cycle
526 */
527 void Engine::RenderStolenVoices(uint Samples) {
528 RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();
529 RTList<Event>::Iterator end = pVoiceStealingQueue->end();
530 for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {
531 EngineChannel* pEngineChannel = (EngineChannel*) itVoiceStealEvent->pEngineChannel;
532 Pool<Voice>::Iterator itNewVoice =
533 LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false, false);
534 if (itNewVoice) {
535 itNewVoice->Render(Samples);
536 if (itNewVoice->IsActive()) ActiveVoiceCountTemp++; // still active
537 else { // voice reached end, is now inactive
538 FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices
539 }
540 }
541 else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));
542
543 // we need to clear the key's event list explicitly here in case key was never active
544 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoiceStealEvent->Param.Note.Key];
545 pKey->VoiceTheftsQueued--;
546 if (!pKey->Active && !pKey->VoiceTheftsQueued) pKey->pEvents->clear();
547 }
548 }
549
550 /**
551 * Free all keys which have turned inactive in this audio fragment, from
552 * the list of active keys and clear all event lists on that engine
553 * channel.
554 *
555 * @param pEngineChannel - engine channel to cleanup
556 */
557 void Engine::PostProcess(EngineChannel* pEngineChannel) {
558 // free all keys which have no active voices left
559 {
560 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
561 RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
562 while (iuiKey != end) { // iterate through all active keys
563 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
564 ++iuiKey;
565 if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);
566 #if CONFIG_DEVMODE
567 else { // just a sanity check for debugging
568 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
569 RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
570 for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
571 if (itVoice->itKillEvent) {
572 dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));
573 }
574 }
575 }
576 #endif // CONFIG_DEVMODE
577 }
578 }
579
580 // empty the engine channel's own event lists
581 pEngineChannel->ClearEventLists();
582 }
583
584 /**
585 * Will be called by the MIDI input device whenever a MIDI system
586 * exclusive message has arrived.
587 *
588 * @param pData - pointer to sysex data
589 * @param Size - lenght of sysex data (in bytes)
590 */
591 void Engine::SendSysex(void* pData, uint Size) {
592 Event event = pEventGenerator->CreateEvent();
593 event.Type = Event::type_sysex;
594 event.Param.Sysex.Size = Size;
595 event.pEngineChannel = NULL; // as Engine global event
596 if (pEventQueue->write_space() > 0) {
597 if (pSysexBuffer->write_space() >= Size) {
598 // copy sysex data to input buffer
599 uint toWrite = Size;
600 uint8_t* pPos = (uint8_t*) pData;
601 while (toWrite) {
602 const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end());
603 pSysexBuffer->write(pPos, writeNow);
604 toWrite -= writeNow;
605 pPos += writeNow;
606
607 }
608 // finally place sysex event into input event queue
609 pEventQueue->push(&event);
610 }
611 else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,CONFIG_SYSEX_BUFFER_SIZE));
612 }
613 else dmsg(1,("Engine: Input event queue full!"));
614 }
615
616 /**
617 * Assigns and triggers a new voice for the respective MIDI key.
618 *
619 * @param pEngineChannel - engine channel on which this event occured on
620 * @param itNoteOnEvent - key, velocity and time stamp of the event
621 */
622 void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
623
624 const int key = itNoteOnEvent->Param.Note.Key;
625
626 // Change key dimension value if key is in keyswitching area
627 {
628 const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;
629 if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
630 pEngineChannel->CurrentKeyDimension = ((key - pInstrument->DimensionKeyRange.low) * 128) /
631 (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
632 }
633
634 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];
635
636 pKey->KeyPressed = true; // the MIDI key was now pressed down
637 pKey->Velocity = itNoteOnEvent->Param.Note.Velocity;
638 pKey->NoteOnTime = FrameTime + itNoteOnEvent->FragmentPos(); // will be used to calculate note length
639
640 // cancel release process of voices on this key if needed
641 if (pKey->Active && !pEngineChannel->SustainPedal) {
642 RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();
643 if (itCancelReleaseEvent) {
644 *itCancelReleaseEvent = *itNoteOnEvent; // copy event
645 itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type
646 }
647 else dmsg(1,("Event pool emtpy!\n"));
648 }
649
650 // move note on event to the key's own event list
651 RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);
652
653 // allocate and trigger new voice(s) for the key
654 {
655 // first, get total amount of required voices (dependant on amount of layers)
656 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEventOnKeyList->Param.Note.Key);
657 if (pRegion) {
658 int voicesRequired = pRegion->Layers;
659 // now launch the required amount of voices
660 for (int i = 0; i < voicesRequired; i++)
661 LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, i, false, true, true);
662 }
663 }
664
665 // if neither a voice was spawned or postponed then remove note on event from key again
666 if (!pKey->Active && !pKey->VoiceTheftsQueued)
667 pKey->pEvents->free(itNoteOnEventOnKeyList);
668
669 pKey->RoundRobinIndex++;
670 }
671
672 /**
673 * Releases the voices on the given key if sustain pedal is not pressed.
674 * If sustain is pressed, the release of the note will be postponed until
675 * sustain pedal will be released or voice turned inactive by itself (e.g.
676 * due to completion of sample playback).
677 *
678 * @param pEngineChannel - engine channel on which this event occured on
679 * @param itNoteOffEvent - key, velocity and time stamp of the event
680 */
681 void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {
682 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
683
684 pKey->KeyPressed = false; // the MIDI key was now released
685
686 // release voices on this key if needed
687 if (pKey->Active && !pEngineChannel->SustainPedal) {
688 itNoteOffEvent->Type = Event::type_release; // transform event type
689
690 // move event to the key's own event list
691 RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);
692
693 // spawn release triggered voice(s) if needed
694 if (pKey->ReleaseTrigger) {
695 // first, get total amount of required voices (dependant on amount of layers)
696 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOffEventOnKeyList->Param.Note.Key);
697 if (pRegion) {
698 int voicesRequired = pRegion->Layers;
699
700 // MIDI note-on velocity is used instead of note-off velocity
701 itNoteOffEventOnKeyList->Param.Note.Velocity = pKey->Velocity;
702
703 // now launch the required amount of voices
704 for (int i = 0; i < voicesRequired; i++)
705 LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, i, true, false, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
706 }
707 pKey->ReleaseTrigger = false;
708 }
709
710 // if neither a voice was spawned or postponed then remove note off event from key again
711 if (!pKey->Active && !pKey->VoiceTheftsQueued)
712 pKey->pEvents->free(itNoteOffEventOnKeyList);
713 }
714 }
715
716 /**
717 * Moves pitchbend event from the general (input) event list to the pitch
718 * event list.
719 *
720 * @param pEngineChannel - engine channel on which this event occured on
721 * @param itPitchbendEvent - absolute pitch value and time stamp of the event
722 */
723 void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) {
724 pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value
725 itPitchbendEvent.moveToEndOf(pEngineChannel->pSynthesisEvents[Event::destination_vco]);
726 }
727
728 /**
729 * Allocates and triggers a new voice. This method will usually be
730 * called by the ProcessNoteOn() method and by the voices itself
731 * (e.g. to spawn further voices on the same key for layered sounds).
732 *
733 * @param pEngineChannel - engine channel on which this event occured on
734 * @param itNoteOnEvent - key, velocity and time stamp of the event
735 * @param iLayer - layer index for the new voice (optional - only
736 * in case of layered sounds of course)
737 * @param ReleaseTriggerVoice - if new voice is a release triggered voice
738 * (optional, default = false)
739 * @param VoiceStealing - if voice stealing should be performed
740 * when there is no free voice
741 * (optional, default = true)
742 * @param HandleKeyGroupConflicts - if voices should be killed due to a
743 * key group conflict
744 * @returns pointer to new voice or NULL if there was no free voice or
745 * if the voice wasn't triggered (for example when no region is
746 * defined for the given key).
747 */
748 Pool<Voice>::Iterator Engine::LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing, bool HandleKeyGroupConflicts) {
749 int MIDIKey = itNoteOnEvent->Param.Note.Key;
750 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[MIDIKey];
751 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(MIDIKey);
752
753 // if nothing defined for this key
754 if (!pRegion) return Pool<Voice>::Iterator(); // nothing to do
755
756 // only mark the first voice of a layered voice (group) to be in a
757 // key group, so the layered voices won't kill each other
758 int iKeyGroup = (iLayer == 0 && !ReleaseTriggerVoice) ? pRegion->KeyGroup : 0;
759
760 // handle key group (a.k.a. exclusive group) conflicts
761 if (HandleKeyGroupConflicts) {
762 if (iKeyGroup) { // if this voice / key belongs to a key group
763 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[iKeyGroup];
764 if (*ppKeyGroup) { // if there's already an active key in that key group
765 midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[**ppKeyGroup];
766 // kill all voices on the (other) key
767 RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
768 RTList<Voice>::Iterator end = pOtherKey->pActiveVoices->end();
769 for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
770 if (itVoiceToBeKilled->Type != Voice::type_release_trigger) {
771 itVoiceToBeKilled->Kill(itNoteOnEvent);
772 --VoiceSpawnsLeft; //FIXME: just a hack, we should better check in StealVoice() if the voice was killed due to key conflict
773 }
774 }
775 }
776 }
777 }
778
779 Voice::type_t VoiceType = Voice::type_normal;
780
781 // get current dimension values to select the right dimension region
782 //TODO: for stolen voices this dimension region selection block is processed twice, this should be changed
783 //FIXME: controller values for selecting the dimension region here are currently not sample accurate
784 uint DimValues[8] = { 0 };
785 for (int i = pRegion->Dimensions - 1; i >= 0; i--) {
786 switch (pRegion->pDimensionDefinitions[i].dimension) {
787 case ::gig::dimension_samplechannel:
788 DimValues[i] = 0; //TODO: we currently ignore this dimension
789 break;
790 case ::gig::dimension_layer:
791 DimValues[i] = iLayer;
792 break;
793 case ::gig::dimension_velocity:
794 DimValues[i] = itNoteOnEvent->Param.Note.Velocity;
795 break;
796 case ::gig::dimension_channelaftertouch:
797 DimValues[i] = 0; //TODO: we currently ignore this dimension
798 break;
799 case ::gig::dimension_releasetrigger:
800 VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;
801 DimValues[i] = (uint) ReleaseTriggerVoice;
802 break;
803 case ::gig::dimension_keyboard:
804 DimValues[i] = (uint) pEngineChannel->CurrentKeyDimension;
805 break;
806 case ::gig::dimension_roundrobin:
807 DimValues[i] = (uint) pEngineChannel->pMIDIKeyInfo[MIDIKey].RoundRobinIndex; // incremented for each note on
808 break;
809 case ::gig::dimension_random:
810 RandomSeed = RandomSeed * 1103515245 + 12345; // classic pseudo random number generator
811 DimValues[i] = (uint) RandomSeed >> (32 - pRegion->pDimensionDefinitions[i].bits); // highest bits are most random
812 break;
813 case ::gig::dimension_modwheel:
814 DimValues[i] = pEngineChannel->ControllerTable[1];
815 break;
816 case ::gig::dimension_breath:
817 DimValues[i] = pEngineChannel->ControllerTable[2];
818 break;
819 case ::gig::dimension_foot:
820 DimValues[i] = pEngineChannel->ControllerTable[4];
821 break;
822 case ::gig::dimension_portamentotime:
823 DimValues[i] = pEngineChannel->ControllerTable[5];
824 break;
825 case ::gig::dimension_effect1:
826 DimValues[i] = pEngineChannel->ControllerTable[12];
827 break;
828 case ::gig::dimension_effect2:
829 DimValues[i] = pEngineChannel->ControllerTable[13];
830 break;
831 case ::gig::dimension_genpurpose1:
832 DimValues[i] = pEngineChannel->ControllerTable[16];
833 break;
834 case ::gig::dimension_genpurpose2:
835 DimValues[i] = pEngineChannel->ControllerTable[17];
836 break;
837 case ::gig::dimension_genpurpose3:
838 DimValues[i] = pEngineChannel->ControllerTable[18];
839 break;
840 case ::gig::dimension_genpurpose4:
841 DimValues[i] = pEngineChannel->ControllerTable[19];
842 break;
843 case ::gig::dimension_sustainpedal:
844 DimValues[i] = pEngineChannel->ControllerTable[64];
845 break;
846 case ::gig::dimension_portamento:
847 DimValues[i] = pEngineChannel->ControllerTable[65];
848 break;
849 case ::gig::dimension_sostenutopedal:
850 DimValues[i] = pEngineChannel->ControllerTable[66];
851 break;
852 case ::gig::dimension_softpedal:
853 DimValues[i] = pEngineChannel->ControllerTable[67];
854 break;
855 case ::gig::dimension_genpurpose5:
856 DimValues[i] = pEngineChannel->ControllerTable[80];
857 break;
858 case ::gig::dimension_genpurpose6:
859 DimValues[i] = pEngineChannel->ControllerTable[81];
860 break;
861 case ::gig::dimension_genpurpose7:
862 DimValues[i] = pEngineChannel->ControllerTable[82];
863 break;
864 case ::gig::dimension_genpurpose8:
865 DimValues[i] = pEngineChannel->ControllerTable[83];
866 break;
867 case ::gig::dimension_effect1depth:
868 DimValues[i] = pEngineChannel->ControllerTable[91];
869 break;
870 case ::gig::dimension_effect2depth:
871 DimValues[i] = pEngineChannel->ControllerTable[92];
872 break;
873 case ::gig::dimension_effect3depth:
874 DimValues[i] = pEngineChannel->ControllerTable[93];
875 break;
876 case ::gig::dimension_effect4depth:
877 DimValues[i] = pEngineChannel->ControllerTable[94];
878 break;
879 case ::gig::dimension_effect5depth:
880 DimValues[i] = pEngineChannel->ControllerTable[95];
881 break;
882 case ::gig::dimension_none:
883 std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;
884 break;
885 default:
886 std::cerr << "gig::Engine::LaunchVoice() Error: Unknown dimension\n" << std::flush;
887 }
888 }
889 ::gig::DimensionRegion* pDimRgn = pRegion->GetDimensionRegionByValue(DimValues);
890
891 // no need to continue if sample is silent
892 if (!pDimRgn->pSample || !pDimRgn->pSample->SamplesTotal) return Pool<Voice>::Iterator();
893
894 // allocate a new voice for the key
895 Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
896 if (itNewVoice) {
897 // launch the new voice
898 if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pDimRgn, VoiceType, iKeyGroup) < 0) {
899 dmsg(4,("Voice not triggered\n"));
900 pKey->pActiveVoices->free(itNewVoice);
901 }
902 else { // on success
903 --VoiceSpawnsLeft;
904 if (!pKey->Active) { // mark as active key
905 pKey->Active = true;
906 pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();
907 *pKey->itSelf = itNoteOnEvent->Param.Note.Key;
908 }
909 if (itNewVoice->KeyGroup) {
910 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];
911 *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group
912 }
913 if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)
914 return itNewVoice; // success
915 }
916 }
917 else if (VoiceStealing) {
918 // try to steal one voice
919 int result = StealVoice(pEngineChannel, itNoteOnEvent);
920 if (!result) { // voice stolen successfully
921 // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died
922 RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();
923 if (itStealEvent) {
924 *itStealEvent = *itNoteOnEvent; // copy event
925 itStealEvent->Param.Note.Layer = iLayer;
926 itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;
927 pKey->VoiceTheftsQueued++;
928 }
929 else dmsg(1,("Voice stealing queue full!\n"));
930 }
931 }
932
933 return Pool<Voice>::Iterator(); // no free voice or error
934 }
935
936 /**
937 * Will be called by LaunchVoice() method in case there are no free
938 * voices left. This method will select and kill one old voice for
939 * voice stealing and postpone the note-on event until the selected
940 * voice actually died.
941 *
942 * @param pEngineChannel - engine channel on which this event occured on
943 * @param itNoteOnEvent - key, velocity and time stamp of the event
944 * @returns 0 on success, a value < 0 if no active voice could be picked for voice stealing
945 */
946 int Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
947 if (VoiceSpawnsLeft <= 0) {
948 dmsg(1,("Max. voice thefts per audio fragment reached (you may raise CONFIG_MAX_VOICES).\n"));
949 return -1;
950 }
951 if (!pEventPool->poolIsEmpty()) {
952
953 RTList<Voice>::Iterator itSelectedVoice;
954
955 // Select one voice for voice stealing
956 switch (CONFIG_VOICE_STEAL_ALGO) {
957
958 // try to pick the oldest voice on the key where the new
959 // voice should be spawned, if there is no voice on that
960 // key, or no voice left to kill, then procceed with
961 // 'oldestkey' algorithm
962 case voice_steal_algo_oldestvoiceonkey: {
963 midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
964 itSelectedVoice = pSelectedKey->pActiveVoices->first();
965 // proceed iterating if voice was created in this fragment cycle
966 while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
967 // if we haven't found a voice then proceed with algorithm 'oldestkey'
968 if (itSelectedVoice && itSelectedVoice->IsStealable()) break;
969 } // no break - intentional !
970
971 // try to pick the oldest voice on the oldest active key
972 // from the same engine channel
973 // (caution: must stay after 'oldestvoiceonkey' algorithm !)
974 case voice_steal_algo_oldestkey: {
975 // if we already stole in this fragment, try to proceed on same key
976 if (this->itLastStolenVoice) {
977 itSelectedVoice = this->itLastStolenVoice;
978 do {
979 ++itSelectedVoice;
980 } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle
981 // found a "stealable" voice ?
982 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
983 // remember which voice we stole, so we can simply proceed on next voice stealing
984 this->itLastStolenVoice = itSelectedVoice;
985 break; // selection succeeded
986 }
987 }
988 // get (next) oldest key
989 RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKey) ? ++this->iuiLastStolenKey : pEngineChannel->pActiveKeys->first();
990 while (iuiSelectedKey) {
991 midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];
992 itSelectedVoice = pSelectedKey->pActiveVoices->first();
993 // proceed iterating if voice was created in this fragment cycle
994 while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
995 // found a "stealable" voice ?
996 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
997 // remember which voice on which key we stole, so we can simply proceed on next voice stealing
998 this->iuiLastStolenKey = iuiSelectedKey;
999 this->itLastStolenVoice = itSelectedVoice;
1000 break; // selection succeeded
1001 }
1002 ++iuiSelectedKey; // get next oldest key
1003 }
1004 break;
1005 }
1006
1007 // don't steal anything
1008 case voice_steal_algo_none:
1009 default: {
1010 dmsg(1,("No free voice (voice stealing disabled)!\n"));
1011 return -1;
1012 }
1013 }
1014
1015 // if we couldn't steal a voice from the same engine channel then
1016 // steal oldest voice on the oldest key from any other engine channel
1017 // (the smaller engine channel number, the higher priority)
1018 if (!itSelectedVoice || !itSelectedVoice->IsStealable()) {
1019 EngineChannel* pSelectedChannel;
1020 int iChannelIndex;
1021 // select engine channel
1022 if (pLastStolenChannel) {
1023 pSelectedChannel = pLastStolenChannel;
1024 iChannelIndex = pSelectedChannel->iEngineIndexSelf;
1025 } else { // pick the engine channel followed by this engine channel
1026 iChannelIndex = (pEngineChannel->iEngineIndexSelf + 1) % engineChannels.size();
1027 pSelectedChannel = engineChannels[iChannelIndex];
1028 }
1029
1030 // if we already stole in this fragment, try to proceed on same key
1031 if (this->itLastStolenVoiceGlobally) {
1032 itSelectedVoice = this->itLastStolenVoiceGlobally;
1033 do {
1034 ++itSelectedVoice;
1035 } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle
1036 }
1037
1038 #if CONFIG_DEVMODE
1039 EngineChannel* pBegin = pSelectedChannel; // to detect endless loop
1040 #endif // CONFIG_DEVMODE
1041
1042 // did we find a 'stealable' voice?
1043 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1044 // remember which voice we stole, so we can simply proceed on next voice stealing
1045 this->itLastStolenVoiceGlobally = itSelectedVoice;
1046 } else while (true) { // iterate through engine channels
1047 // get (next) oldest key
1048 RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKeyGlobally) ? ++this->iuiLastStolenKeyGlobally : pSelectedChannel->pActiveKeys->first();
1049 this->iuiLastStolenKeyGlobally = RTList<uint>::Iterator(); // to prevent endless loop (see line above)
1050 while (iuiSelectedKey) {
1051 midi_key_info_t* pSelectedKey = &pSelectedChannel->pMIDIKeyInfo[*iuiSelectedKey];
1052 itSelectedVoice = pSelectedKey->pActiveVoices->first();
1053 // proceed iterating if voice was created in this fragment cycle
1054 while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
1055 // found a "stealable" voice ?
1056 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1057 // remember which voice on which key on which engine channel we stole, so we can simply proceed on next voice stealing
1058 this->iuiLastStolenKeyGlobally = iuiSelectedKey;
1059 this->itLastStolenVoiceGlobally = itSelectedVoice;
1060 this->pLastStolenChannel = pSelectedChannel;
1061 goto stealable_voice_found; // selection succeeded
1062 }
1063 ++iuiSelectedKey; // get next key on current engine channel
1064 }
1065 // get next engine channel
1066 iChannelIndex = (iChannelIndex + 1) % engineChannels.size();
1067 pSelectedChannel = engineChannels[iChannelIndex];
1068
1069 #if CONFIG_DEVMODE
1070 if (pSelectedChannel == pBegin) {
1071 dmsg(1,("FATAL ERROR: voice stealing endless loop!\n"));
1072 dmsg(1,("VoiceSpawnsLeft=%d.\n", VoiceSpawnsLeft));
1073 dmsg(1,("Exiting.\n"));
1074 exit(-1);
1075 }
1076 #endif // CONFIG_DEVMODE
1077 }
1078 }
1079
1080 // jump point if a 'stealable' voice was found
1081 stealable_voice_found:
1082
1083 #if CONFIG_DEVMODE
1084 if (!itSelectedVoice->IsActive()) {
1085 dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));
1086 return -1;
1087 }
1088 #endif // CONFIG_DEVMODE
1089
1090 // now kill the selected voice
1091 itSelectedVoice->Kill(itNoteOnEvent);
1092
1093 --VoiceSpawnsLeft;
1094
1095 return 0; // success
1096 }
1097 else {
1098 dmsg(1,("Event pool emtpy!\n"));
1099 return -1;
1100 }
1101 }
1102
1103 /**
1104 * Removes the given voice from the MIDI key's list of active voices.
1105 * This method will be called when a voice went inactive, e.g. because
1106 * it finished to playback its sample, finished its release stage or
1107 * just was killed.
1108 *
1109 * @param pEngineChannel - engine channel on which this event occured on
1110 * @param itVoice - points to the voice to be freed
1111 */
1112 void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) {
1113 if (itVoice) {
1114 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoice->MIDIKey];
1115
1116 uint keygroup = itVoice->KeyGroup;
1117
1118 // free the voice object
1119 pVoicePool->free(itVoice);
1120
1121 // if no other voices left and member of a key group, remove from key group
1122 if (pKey->pActiveVoices->isEmpty() && keygroup) {
1123 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[keygroup];
1124 if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group
1125 }
1126 }
1127 else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;
1128 }
1129
1130 /**
1131 * Called when there's no more voice left on a key, this call will
1132 * update the key info respectively.
1133 *
1134 * @param pEngineChannel - engine channel on which this event occured on
1135 * @param pKey - key which is now inactive
1136 */
1137 void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) {
1138 if (pKey->pActiveVoices->isEmpty()) {
1139 pKey->Active = false;
1140 pEngineChannel->pActiveKeys->free(pKey->itSelf); // remove key from list of active keys
1141 pKey->itSelf = RTList<uint>::Iterator();
1142 pKey->ReleaseTrigger = false;
1143 pKey->pEvents->clear();
1144 dmsg(3,("Key has no more voices now\n"));
1145 }
1146 else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n"));
1147 }
1148
1149 /**
1150 * Reacts on supported control change commands (e.g. pitch bend wheel,
1151 * modulation wheel, aftertouch).
1152 *
1153 * @param pEngineChannel - engine channel on which this event occured on
1154 * @param itControlChangeEvent - controller, value and time stamp of the event
1155 */
1156 void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) {
1157 dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
1158
1159 // update controller value in the engine channel's controller table
1160 pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
1161
1162 // move event from the unsorted event list to the control change event list
1163 Pool<Event>::Iterator itControlChangeEventOnCCList = itControlChangeEvent.moveToEndOf(pEngineChannel->pCCEvents);
1164
1165 switch (itControlChangeEventOnCCList->Param.CC.Controller) {
1166 case 7: { // volume
1167 //TODO: not sample accurate yet
1168 pEngineChannel->GlobalVolume = (float) itControlChangeEventOnCCList->Param.CC.Value / 127.0f;
1169 pEngineChannel->bStatusChanged = true; // engine channel status has changed, so set notify flag
1170 break;
1171 }
1172 case 10: { // panpot
1173 //TODO: not sample accurate yet
1174 const int pan = (int) itControlChangeEventOnCCList->Param.CC.Value - 64;
1175 pEngineChannel->GlobalPanLeft = 1.0f - float(RTMath::Max(pan, 0)) / 63.0f;
1176 pEngineChannel->GlobalPanRight = 1.0f - float(RTMath::Min(pan, 0)) / -64.0f;
1177 break;
1178 }
1179 case 64: { // sustain
1180 if (itControlChangeEventOnCCList->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {
1181 dmsg(4,("PEDAL DOWN\n"));
1182 pEngineChannel->SustainPedal = true;
1183
1184 // cancel release process of voices if necessary
1185 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1186 for (; iuiKey; ++iuiKey) {
1187 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1188 if (!pKey->KeyPressed) {
1189 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1190 if (itNewEvent) {
1191 *itNewEvent = *itControlChangeEventOnCCList; // copy event to the key's own event list
1192 itNewEvent->Type = Event::type_cancel_release; // transform event type
1193 }
1194 else dmsg(1,("Event pool emtpy!\n"));
1195 }
1196 }
1197 }
1198 if (itControlChangeEventOnCCList->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {
1199 dmsg(4,("PEDAL UP\n"));
1200 pEngineChannel->SustainPedal = false;
1201
1202 // release voices if their respective key is not pressed
1203 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1204 for (; iuiKey; ++iuiKey) {
1205 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1206 if (!pKey->KeyPressed) {
1207 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1208 if (itNewEvent) {
1209 *itNewEvent = *itControlChangeEventOnCCList; // copy event to the key's own event list
1210 itNewEvent->Type = Event::type_release; // transform event type
1211 }
1212 else dmsg(1,("Event pool emtpy!\n"));
1213 }
1214 }
1215 }
1216 break;
1217 }
1218
1219
1220 // Channel Mode Messages
1221
1222 case 120: { // all sound off
1223 KillAllVoices(pEngineChannel, itControlChangeEventOnCCList);
1224 break;
1225 }
1226 case 121: { // reset all controllers
1227 pEngineChannel->ResetControllers();
1228 break;
1229 }
1230 case 123: { // all notes off
1231 ReleaseAllVoices(pEngineChannel, itControlChangeEventOnCCList);
1232 break;
1233 }
1234 }
1235 }
1236
1237 /**
1238 * Reacts on MIDI system exclusive messages.
1239 *
1240 * @param itSysexEvent - sysex data size and time stamp of the sysex event
1241 */
1242 void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {
1243 RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader();
1244
1245 uint8_t exclusive_status, id;
1246 if (!reader.pop(&exclusive_status)) goto free_sysex_data;
1247 if (!reader.pop(&id)) goto free_sysex_data;
1248 if (exclusive_status != 0xF0) goto free_sysex_data;
1249
1250 switch (id) {
1251 case 0x41: { // Roland
1252 dmsg(3,("Roland Sysex\n"));
1253 uint8_t device_id, model_id, cmd_id;
1254 if (!reader.pop(&device_id)) goto free_sysex_data;
1255 if (!reader.pop(&model_id)) goto free_sysex_data;
1256 if (!reader.pop(&cmd_id)) goto free_sysex_data;
1257 if (model_id != 0x42 /*GS*/) goto free_sysex_data;
1258 if (cmd_id != 0x12 /*DT1*/) goto free_sysex_data;
1259
1260 // command address
1261 uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB)
1262 const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later
1263 if (reader.read(&addr[0], 3) != 3) goto free_sysex_data;
1264 if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters
1265 dmsg(3,("\tSystem Parameter\n"));
1266 }
1267 else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters
1268 dmsg(3,("\tCommon Parameter\n"));
1269 }
1270 else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)
1271 dmsg(3,("\tPart Parameter\n"));
1272 switch (addr[2]) {
1273 case 0x40: { // scale tuning
1274 dmsg(3,("\t\tScale Tuning\n"));
1275 uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave
1276 if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data;
1277 uint8_t checksum;
1278 if (!reader.pop(&checksum)) goto free_sysex_data;
1279 #if CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1280 if (GSCheckSum(checksum_reader, 12)) goto free_sysex_data;
1281 #endif // CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1282 for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;
1283 AdjustScale((int8_t*) scale_tunes);
1284 dmsg(3,("\t\t\tNew scale applied.\n"));
1285 break;
1286 }
1287 }
1288 }
1289 else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)
1290 }
1291 else if (addr[0] == 0x41) { // Drum Setup Parameters
1292 }
1293 break;
1294 }
1295 }
1296
1297 free_sysex_data: // finally free sysex data
1298 pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);
1299 }
1300
1301 /**
1302 * Calculates the Roland GS sysex check sum.
1303 *
1304 * @param AddrReader - reader which currently points to the first GS
1305 * command address byte of the GS sysex message in
1306 * question
1307 * @param DataSize - size of the GS message data (in bytes)
1308 */
1309 uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) {
1310 RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader;
1311 uint bytes = 3 /*addr*/ + DataSize;
1312 uint8_t addr_and_data[bytes];
1313 reader.read(&addr_and_data[0], bytes);
1314 uint8_t sum = 0;
1315 for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];
1316 return 128 - sum % 128;
1317 }
1318
1319 /**
1320 * Allows to tune each of the twelve semitones of an octave.
1321 *
1322 * @param ScaleTunes - detuning of all twelve semitones (in cents)
1323 */
1324 void Engine::AdjustScale(int8_t ScaleTunes[12]) {
1325 memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate
1326 }
1327
1328 /**
1329 * Releases all voices on an engine channel. All voices will go into
1330 * the release stage and thus it might take some time (e.g. dependant to
1331 * their envelope release time) until they actually die.
1332 *
1333 * @param pEngineChannel - engine channel on which all voices should be released
1334 * @param itReleaseEvent - event which caused this releasing of all voices
1335 */
1336 void Engine::ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent) {
1337 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1338 while (iuiKey) {
1339 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1340 ++iuiKey;
1341 // append a 'release' event to the key's own event list
1342 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1343 if (itNewEvent) {
1344 *itNewEvent = *itReleaseEvent; // copy original event (to the key's event list)
1345 itNewEvent->Type = Event::type_release; // transform event type
1346 }
1347 else dmsg(1,("Event pool emtpy!\n"));
1348 }
1349 }
1350
1351 /**
1352 * Kills all voices on an engine channel as soon as possible. Voices
1353 * won't get into release state, their volume level will be ramped down
1354 * as fast as possible.
1355 *
1356 * @param pEngineChannel - engine channel on which all voices should be killed
1357 * @param itKillEvent - event which caused this killing of all voices
1358 */
1359 void Engine::KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent) {
1360 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1361 RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
1362 while (iuiKey != end) { // iterate through all active keys
1363 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1364 ++iuiKey;
1365 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
1366 RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
1367 for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
1368 itVoice->Kill(itKillEvent);
1369 --VoiceSpawnsLeft; //FIXME: just a temporary workaround, we should check the cause in StealVoice() instead
1370 }
1371 }
1372 }
1373
1374 /**
1375 * Initialize the parameter sequence for the modulation destination given by
1376 * by 'dst' with the constant value given by val.
1377 */
1378 void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) {
1379 int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle();
1380 float* m = &pSynthesisParameters[dst][0];
1381 for (int i = 0; i < maxsamples; i += 4) {
1382 m[i] = val;
1383 m[i+1] = val;
1384 m[i+2] = val;
1385 m[i+3] = val;
1386 }
1387 }
1388
1389 uint Engine::VoiceCount() {
1390 return ActiveVoiceCount;
1391 }
1392
1393 uint Engine::VoiceCountMax() {
1394 return ActiveVoiceCountMax;
1395 }
1396
1397 bool Engine::DiskStreamSupported() {
1398 return true;
1399 }
1400
1401 uint Engine::DiskStreamCount() {
1402 return (pDiskThread) ? pDiskThread->ActiveStreamCount : 0;
1403 }
1404
1405 uint Engine::DiskStreamCountMax() {
1406 return (pDiskThread) ? pDiskThread->ActiveStreamCountMax : 0;
1407 }
1408
1409 String Engine::DiskStreamBufferFillBytes() {
1410 return pDiskThread->GetBufferFillBytes();
1411 }
1412
1413 String Engine::DiskStreamBufferFillPercentage() {
1414 return pDiskThread->GetBufferFillPercentage();
1415 }
1416
1417 String Engine::EngineName() {
1418 return LS_GIG_ENGINE_NAME;
1419 }
1420
1421 String Engine::Description() {
1422 return "Gigasampler Engine";
1423 }
1424
1425 String Engine::Version() {
1426 String s = "$Revision: 1.49 $";
1427 return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
1428 }
1429
1430 }} // namespace LinuxSampler::gig

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