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

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Revision 716 - (hide annotations) (download)
Sun Jul 24 06:57:30 2005 UTC (14 years, 11 months ago) by iliev
File size: 68921 byte(s)
* Added configure option --enable-process-muted-channels
which can be used to enable the processing of muted channels

1 schoenebeck 53 /***************************************************************************
2     * *
3     * LinuxSampler - modular, streaming capable sampler *
4     * *
5 schoenebeck 56 * Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6 schoenebeck 411 * Copyright (C) 2005 Christian Schoenebeck *
7 schoenebeck 53 * *
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 schoenebeck 285 #include "EGADSR.h"
28 schoenebeck 420 #include "../EngineFactory.h"
29 schoenebeck 53
30     #include "Engine.h"
31    
32 schoenebeck 361 #if defined(__APPLE__)
33     # include <stdlib.h>
34     #else
35     # include <malloc.h>
36     #endif
37    
38 schoenebeck 53 namespace LinuxSampler { namespace gig {
39    
40 schoenebeck 411 InstrumentResourceManager Engine::instruments;
41 schoenebeck 53
42 schoenebeck 411 std::map<AudioOutputDevice*,Engine*> Engine::engines;
43    
44 schoenebeck 412 /**
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 schoenebeck 411 Engine* Engine::AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {
55 schoenebeck 412 Engine* pEngine = NULL;
56     // check if there's already an engine for the given audio output device
57 schoenebeck 411 if (engines.count(pDevice)) {
58 schoenebeck 412 dmsg(4,("Using existing gig::Engine.\n"));
59 persson 438 pEngine = engines[pDevice];
60 schoenebeck 412 } else { // create a new engine (and disk thread) instance for the given audio output device
61     dmsg(4,("Creating new gig::Engine.\n"));
62 schoenebeck 420 pEngine = (Engine*) EngineFactory::Create("gig");
63 schoenebeck 411 pEngine->Connect(pDevice);
64 persson 438 engines[pDevice] = pEngine;
65 schoenebeck 411 }
66 schoenebeck 412 // register engine channel to the engine instance
67 schoenebeck 460 pEngine->engineChannels.add(pChannel);
68     // remember index in the ArrayList
69     pChannel->iEngineIndexSelf = pEngine->engineChannels.size() - 1;
70 schoenebeck 412 dmsg(4,("This gig::Engine has now %d EngineChannels.\n",pEngine->engineChannels.size()));
71 schoenebeck 411 return pEngine;
72     }
73    
74 schoenebeck 412 /**
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 schoenebeck 411 void Engine::FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {
85 schoenebeck 412 dmsg(4,("Disconnecting EngineChannel from gig::Engine.\n"));
86 schoenebeck 411 Engine* pEngine = engines[pDevice];
87 schoenebeck 412 // 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 schoenebeck 411 }
98    
99 schoenebeck 473 /**
100     * Constructor
101     */
102 schoenebeck 53 Engine::Engine() {
103     pAudioOutputDevice = NULL;
104     pDiskThread = NULL;
105     pEventGenerator = NULL;
106 schoenebeck 554 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 schoenebeck 271 pVoiceStealingQueue = new RTList<Event>(pEventPool);
111 schoenebeck 460 pGlobalEvents = new RTList<Event>(pEventPool);
112 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
113     iterVoice->SetEngine(this);
114 schoenebeck 53 }
115     pVoicePool->clear();
116    
117     pSynthesisParameters[0] = NULL; // we allocate when an audio device is connected
118 schoenebeck 80 pBasicFilterParameters = NULL;
119     pMainFilterParameters = NULL;
120 schoenebeck 123
121 schoenebeck 53 ResetInternal();
122 schoenebeck 659 ResetScaleTuning();
123 schoenebeck 53 }
124    
125 schoenebeck 473 /**
126     * Destructor
127     */
128 schoenebeck 53 Engine::~Engine() {
129     if (pDiskThread) {
130 senkov 329 dmsg(1,("Stopping disk thread..."));
131 schoenebeck 53 pDiskThread->StopThread();
132     delete pDiskThread;
133 senkov 329 dmsg(1,("OK\n"));
134 schoenebeck 53 }
135     if (pEventQueue) delete pEventQueue;
136     if (pEventPool) delete pEventPool;
137 schoenebeck 411 if (pVoicePool) {
138     pVoicePool->clear();
139     delete pVoicePool;
140     }
141 schoenebeck 53 if (pEventGenerator) delete pEventGenerator;
142 schoenebeck 80 if (pMainFilterParameters) delete[] pMainFilterParameters;
143     if (pBasicFilterParameters) delete[] pBasicFilterParameters;
144 schoenebeck 319 if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
145 schoenebeck 250 if (pVoiceStealingQueue) delete pVoiceStealingQueue;
146 schoenebeck 411 if (pSysexBuffer) delete pSysexBuffer;
147 schoenebeck 420 EngineFactory::Destroy(this);
148 schoenebeck 53 }
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 schoenebeck 64 dmsg(3,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe()));
154 schoenebeck 53 }
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 schoenebeck 659 ResetScaleTuning();
176 schoenebeck 53 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 schoenebeck 250 // reset voice stealing parameters
188     pVoiceStealingQueue->clear();
189 schoenebeck 649 itLastStolenVoice = RTList<Voice>::Iterator();
190     itLastStolenVoiceGlobally = RTList<Voice>::Iterator();
191     iuiLastStolenKey = RTList<uint>::Iterator();
192     iuiLastStolenKeyGlobally = RTList<uint>::Iterator();
193     pLastStolenChannel = NULL;
194 schoenebeck 250
195 schoenebeck 53 // reset all voices
196 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
197     iterVoice->Reset();
198 schoenebeck 53 }
199     pVoicePool->clear();
200    
201     // reset disk thread
202     if (pDiskThread) pDiskThread->Reset();
203    
204     // delete all input events
205     pEventQueue->init();
206 persson 438 }
207 schoenebeck 53
208 schoenebeck 473 /**
209 schoenebeck 659 * Reset to normal, chromatic scale (means equal tempered).
210     */
211     void Engine::ResetScaleTuning() {
212     memset(&ScaleTuning[0], 0x00, 12);
213     }
214    
215     /**
216 schoenebeck 473 * 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 schoenebeck 53 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 persson 438
238 schoenebeck 460 this->MaxSamplesPerCycle = pAudioOutputDevice->MaxSamplesPerCycle();
239     this->SampleRate = pAudioOutputDevice->SampleRate();
240 schoenebeck 225
241 schoenebeck 285 // FIXME: audio drivers with varying fragment sizes might be a problem here
242 schoenebeck 554 MaxFadeOutPos = MaxSamplesPerCycle - int(double(SampleRate) * CONFIG_EG_MIN_RELEASE_TIME) - 1;
243 schoenebeck 688 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 schoenebeck 690 << "May lead to click sounds if voice stealing chimes in!\n" << std::flush;
247 schoenebeck 688 // 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 schoenebeck 285
257 schoenebeck 53 // (re)create disk thread
258     if (this->pDiskThread) {
259 senkov 329 dmsg(1,("Stopping disk thread..."));
260 schoenebeck 53 this->pDiskThread->StopThread();
261     delete this->pDiskThread;
262 senkov 329 dmsg(1,("OK\n"));
263 schoenebeck 53 }
264 schoenebeck 554 this->pDiskThread = new DiskThread(((pAudioOut->MaxSamplesPerCycle() << CONFIG_MAX_PITCH) << 1) + 6); //FIXME: assuming stereo
265 schoenebeck 53 if (!pDiskThread) {
266     dmsg(0,("gig::Engine new diskthread = NULL\n"));
267     exit(EXIT_FAILURE);
268     }
269    
270 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
271     iterVoice->pDiskThread = this->pDiskThread;
272 schoenebeck 53 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 schoenebeck 319 if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
282 schoenebeck 361
283     #if defined(__APPLE__)
284     pSynthesisParameters[0] = (float *) malloc(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle());
285     #else
286 schoenebeck 319 pSynthesisParameters[0] = (float *) memalign(16,(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle()));
287 schoenebeck 361 #endif
288 schoenebeck 53 for (int dst = 1; dst < Event::destination_count; dst++)
289     pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();
290    
291 schoenebeck 80 // (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 schoenebeck 53 dmsg(1,("Starting disk thread..."));
298     pDiskThread->StartThread();
299     dmsg(1,("OK\n"));
300    
301 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
302     if (!iterVoice->pDiskThread) {
303 schoenebeck 53 dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));
304     exit(EXIT_FAILURE);
305     }
306     }
307     }
308    
309 schoenebeck 473 /**
310     * Clear all engine global event lists.
311     */
312 schoenebeck 412 void Engine::ClearEventLists() {
313 schoenebeck 460 pGlobalEvents->clear();
314 schoenebeck 412 }
315    
316 schoenebeck 53 /**
317 schoenebeck 460 * 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 schoenebeck 412 *
326 schoenebeck 460 * @param Samples - number of sample points to be processed in the
327     * current audio cycle
328 schoenebeck 412 */
329 schoenebeck 460 void Engine::ImportEvents(uint Samples) {
330 schoenebeck 412 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 schoenebeck 460 if (pGlobalEvents->poolIsEmpty()) {
344 schoenebeck 412 dmsg(1,("Event pool emtpy!\n"));
345     break;
346     }
347 schoenebeck 460 *pGlobalEvents->allocAppend() = *pEvent;
348 schoenebeck 412 }
349     eventQueueReader.free(); // free all copied events from input queue
350 persson 438 }
351 schoenebeck 412
352     /**
353 schoenebeck 53 * 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 schoenebeck 412 int Engine::RenderAudio(uint Samples) {
363 schoenebeck 53 dmsg(5,("RenderAudio(Samples=%d)\n", Samples));
364    
365 schoenebeck 412 // return if engine disabled
366 schoenebeck 53 if (EngineDisabled.Pop()) {
367     dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));
368     return 0;
369     }
370    
371 schoenebeck 293 // update time of start and end of this audio fragment (as events' time stamps relate to this)
372     pEventGenerator->UpdateFragmentTime(Samples);
373    
374 schoenebeck 663 // 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 schoenebeck 412 // 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 schoenebeck 460 ImportEvents(Samples);
382 schoenebeck 412
383     // process engine global events (these are currently only MIDI System Exclusive messages)
384     {
385 schoenebeck 460 RTList<Event>::Iterator itEvent = pGlobalEvents->first();
386     RTList<Event>::Iterator end = pGlobalEvents->end();
387 schoenebeck 412 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 schoenebeck 53 }
396 schoenebeck 412
397     // reset internal voice counter (just for statistic of active voices)
398     ActiveVoiceCountTemp = 0;
399    
400 schoenebeck 466 // handle events on all engine channels
401 schoenebeck 460 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 schoenebeck 466 }
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 schoenebeck 460 RenderActiveVoices(engineChannels[i], Samples);
410 schoenebeck 412 }
411    
412 schoenebeck 460 // 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 schoenebeck 412 // just some statistics about this engine instance
429     ActiveVoiceCount = ActiveVoiceCountTemp;
430     if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;
431    
432 persson 630 FrameTime += Samples;
433    
434 schoenebeck 412 return 0;
435     }
436    
437 schoenebeck 473 /**
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 schoenebeck 460 void Engine::ProcessEvents(EngineChannel* pEngineChannel, uint Samples) {
447 schoenebeck 412 // 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 schoenebeck 460 pEngineChannel->ImportEvents(Samples);
450 schoenebeck 53
451     // process events
452 schoenebeck 271 {
453 schoenebeck 460 RTList<Event>::Iterator itEvent = pEngineChannel->pEvents->first();
454     RTList<Event>::Iterator end = pEngineChannel->pEvents->end();
455 schoenebeck 271 for (; itEvent != end; ++itEvent) {
456     switch (itEvent->Type) {
457     case Event::type_note_on:
458     dmsg(5,("Engine: Note on received\n"));
459 schoenebeck 412 ProcessNoteOn((EngineChannel*)itEvent->pEngineChannel, itEvent);
460 schoenebeck 271 break;
461     case Event::type_note_off:
462     dmsg(5,("Engine: Note off received\n"));
463 schoenebeck 412 ProcessNoteOff((EngineChannel*)itEvent->pEngineChannel, itEvent);
464 schoenebeck 271 break;
465     case Event::type_control_change:
466     dmsg(5,("Engine: MIDI CC received\n"));
467 schoenebeck 412 ProcessControlChange((EngineChannel*)itEvent->pEngineChannel, itEvent);
468 schoenebeck 271 break;
469     case Event::type_pitchbend:
470     dmsg(5,("Engine: Pitchbend received\n"));
471 schoenebeck 412 ProcessPitchbend((EngineChannel*)itEvent->pEngineChannel, itEvent);
472 schoenebeck 271 break;
473     }
474 schoenebeck 53 }
475     }
476 schoenebeck 649
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 schoenebeck 460 }
484 schoenebeck 53
485 schoenebeck 473 /**
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 schoenebeck 460 void Engine::RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples) {
495 iliev 716 #if !CONFIG_PROCESS_MUTED_CHANNELS
496 schoenebeck 705 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
497 iliev 716 #endif
498 schoenebeck 705
499 schoenebeck 460 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
500     RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
501     while (iuiKey != end) { // iterate through all active keys
502     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
503     ++iuiKey;
504 schoenebeck 53
505 schoenebeck 460 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
506     RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
507     for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
508     // now render current voice
509     itVoice->Render(Samples);
510     if (itVoice->IsActive()) ActiveVoiceCountTemp++; // still active
511     else { // voice reached end, is now inactive
512     FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices
513 schoenebeck 53 }
514     }
515     }
516 schoenebeck 460 }
517 schoenebeck 53
518 schoenebeck 473 /**
519     * Render all stolen voices (only voices which were stolen in this
520     * fragment) on the given engine channel. Stolen voices are rendered
521     * after all normal voices have been rendered; this is needed to render
522     * audio of those voices which were selected for voice stealing until
523     * the point were the stealing (that is the take over of the voice)
524     * actually happened.
525     *
526     * @param pEngineChannel - engine channel on which audio should be
527     * rendered
528     * @param Samples - amount of sample points to be rendered in
529     * this audio fragment cycle
530     */
531 schoenebeck 460 void Engine::RenderStolenVoices(uint Samples) {
532     RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();
533     RTList<Event>::Iterator end = pVoiceStealingQueue->end();
534     for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {
535     EngineChannel* pEngineChannel = (EngineChannel*) itVoiceStealEvent->pEngineChannel;
536     Pool<Voice>::Iterator itNewVoice =
537 schoenebeck 668 LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false, false);
538 schoenebeck 460 if (itNewVoice) {
539     itNewVoice->Render(Samples);
540     if (itNewVoice->IsActive()) ActiveVoiceCountTemp++; // still active
541     else { // voice reached end, is now inactive
542     FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices
543 schoenebeck 250 }
544     }
545 schoenebeck 460 else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));
546 schoenebeck 473
547     // we need to clear the key's event list explicitly here in case key was never active
548     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoiceStealEvent->Param.Note.Key];
549     pKey->VoiceTheftsQueued--;
550     if (!pKey->Active && !pKey->VoiceTheftsQueued) pKey->pEvents->clear();
551 schoenebeck 250 }
552 schoenebeck 460 }
553 schoenebeck 250
554 schoenebeck 473 /**
555     * Free all keys which have turned inactive in this audio fragment, from
556     * the list of active keys and clear all event lists on that engine
557     * channel.
558     *
559     * @param pEngineChannel - engine channel to cleanup
560     */
561 schoenebeck 460 void Engine::PostProcess(EngineChannel* pEngineChannel) {
562 schoenebeck 287 // free all keys which have no active voices left
563     {
564 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
565     RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
566 schoenebeck 287 while (iuiKey != end) { // iterate through all active keys
567 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
568 schoenebeck 287 ++iuiKey;
569 schoenebeck 411 if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);
570 schoenebeck 554 #if CONFIG_DEVMODE
571 schoenebeck 563 else { // just a sanity check for debugging
572 schoenebeck 287 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
573     RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
574     for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
575     if (itVoice->itKillEvent) {
576     dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));
577     }
578     }
579     }
580 schoenebeck 554 #endif // CONFIG_DEVMODE
581 schoenebeck 287 }
582     }
583 schoenebeck 460
584     // empty the engine channel's own event lists
585     pEngineChannel->ClearEventLists();
586 schoenebeck 412 }
587 schoenebeck 287
588 schoenebeck 53 /**
589 schoenebeck 244 * Will be called by the MIDI input device whenever a MIDI system
590     * exclusive message has arrived.
591     *
592     * @param pData - pointer to sysex data
593     * @param Size - lenght of sysex data (in bytes)
594     */
595     void Engine::SendSysex(void* pData, uint Size) {
596 schoenebeck 246 Event event = pEventGenerator->CreateEvent();
597     event.Type = Event::type_sysex;
598     event.Param.Sysex.Size = Size;
599 schoenebeck 412 event.pEngineChannel = NULL; // as Engine global event
600 schoenebeck 244 if (pEventQueue->write_space() > 0) {
601     if (pSysexBuffer->write_space() >= Size) {
602     // copy sysex data to input buffer
603     uint toWrite = Size;
604     uint8_t* pPos = (uint8_t*) pData;
605     while (toWrite) {
606     const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end());
607     pSysexBuffer->write(pPos, writeNow);
608     toWrite -= writeNow;
609     pPos += writeNow;
610    
611     }
612     // finally place sysex event into input event queue
613     pEventQueue->push(&event);
614     }
615 schoenebeck 554 else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,CONFIG_SYSEX_BUFFER_SIZE));
616 schoenebeck 244 }
617     else dmsg(1,("Engine: Input event queue full!"));
618     }
619    
620     /**
621 schoenebeck 53 * Assigns and triggers a new voice for the respective MIDI key.
622     *
623 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
624 schoenebeck 271 * @param itNoteOnEvent - key, velocity and time stamp of the event
625 schoenebeck 53 */
626 schoenebeck 411 void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
627 iliev 716 #if !CONFIG_PROCESS_MUTED_CHANNELS
628     if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
629     #endif
630 persson 438
631 schoenebeck 354 const int key = itNoteOnEvent->Param.Note.Key;
632    
633     // Change key dimension value if key is in keyswitching area
634 schoenebeck 411 {
635     const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;
636     if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
637     pEngineChannel->CurrentKeyDimension = ((key - pInstrument->DimensionKeyRange.low) * 128) /
638     (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
639     }
640 schoenebeck 354
641 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];
642 schoenebeck 354
643 schoenebeck 53 pKey->KeyPressed = true; // the MIDI key was now pressed down
644 persson 630 pKey->Velocity = itNoteOnEvent->Param.Note.Velocity;
645     pKey->NoteOnTime = FrameTime + itNoteOnEvent->FragmentPos(); // will be used to calculate note length
646 schoenebeck 53
647     // cancel release process of voices on this key if needed
648 schoenebeck 411 if (pKey->Active && !pEngineChannel->SustainPedal) {
649 schoenebeck 271 RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();
650     if (itCancelReleaseEvent) {
651     *itCancelReleaseEvent = *itNoteOnEvent; // copy event
652     itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type
653 schoenebeck 239 }
654     else dmsg(1,("Event pool emtpy!\n"));
655 schoenebeck 53 }
656    
657 schoenebeck 271 // move note on event to the key's own event list
658     RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);
659    
660 schoenebeck 460 // allocate and trigger new voice(s) for the key
661     {
662     // first, get total amount of required voices (dependant on amount of layers)
663     ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEventOnKeyList->Param.Note.Key);
664     if (pRegion) {
665     int voicesRequired = pRegion->Layers;
666     // now launch the required amount of voices
667     for (int i = 0; i < voicesRequired; i++)
668 schoenebeck 668 LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, i, false, true, true);
669 schoenebeck 460 }
670     }
671 persson 438
672 schoenebeck 473 // if neither a voice was spawned or postponed then remove note on event from key again
673     if (!pKey->Active && !pKey->VoiceTheftsQueued)
674     pKey->pEvents->free(itNoteOnEventOnKeyList);
675    
676 persson 438 pKey->RoundRobinIndex++;
677 schoenebeck 53 }
678    
679     /**
680     * Releases the voices on the given key if sustain pedal is not pressed.
681     * If sustain is pressed, the release of the note will be postponed until
682     * sustain pedal will be released or voice turned inactive by itself (e.g.
683     * due to completion of sample playback).
684     *
685 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
686 schoenebeck 271 * @param itNoteOffEvent - key, velocity and time stamp of the event
687 schoenebeck 53 */
688 schoenebeck 411 void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {
689 iliev 716 #if !CONFIG_PROCESS_MUTED_CHANNELS
690 schoenebeck 705 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
691 iliev 716 #endif
692 schoenebeck 705
693 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
694 schoenebeck 53 pKey->KeyPressed = false; // the MIDI key was now released
695    
696     // release voices on this key if needed
697 schoenebeck 411 if (pKey->Active && !pEngineChannel->SustainPedal) {
698 schoenebeck 271 itNoteOffEvent->Type = Event::type_release; // transform event type
699 schoenebeck 242
700 persson 497 // move event to the key's own event list
701     RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);
702 schoenebeck 271
703 persson 497 // spawn release triggered voice(s) if needed
704 persson 630 if (pKey->ReleaseTrigger) {
705 persson 497 // first, get total amount of required voices (dependant on amount of layers)
706     ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOffEventOnKeyList->Param.Note.Key);
707     if (pRegion) {
708     int voicesRequired = pRegion->Layers;
709 persson 630
710     // MIDI note-on velocity is used instead of note-off velocity
711     itNoteOffEventOnKeyList->Param.Note.Velocity = pKey->Velocity;
712    
713 persson 497 // now launch the required amount of voices
714     for (int i = 0; i < voicesRequired; i++)
715 schoenebeck 668 LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, i, true, false, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
716 persson 497 }
717     pKey->ReleaseTrigger = false;
718 schoenebeck 460 }
719 persson 497
720     // if neither a voice was spawned or postponed then remove note off event from key again
721     if (!pKey->Active && !pKey->VoiceTheftsQueued)
722     pKey->pEvents->free(itNoteOffEventOnKeyList);
723 schoenebeck 242 }
724 schoenebeck 53 }
725    
726     /**
727     * Moves pitchbend event from the general (input) event list to the pitch
728     * event list.
729     *
730 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
731 schoenebeck 271 * @param itPitchbendEvent - absolute pitch value and time stamp of the event
732 schoenebeck 53 */
733 schoenebeck 411 void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) {
734     pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value
735 schoenebeck 460 itPitchbendEvent.moveToEndOf(pEngineChannel->pSynthesisEvents[Event::destination_vco]);
736 schoenebeck 53 }
737    
738     /**
739 schoenebeck 233 * Allocates and triggers a new voice. This method will usually be
740     * called by the ProcessNoteOn() method and by the voices itself
741     * (e.g. to spawn further voices on the same key for layered sounds).
742     *
743 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
744 schoenebeck 271 * @param itNoteOnEvent - key, velocity and time stamp of the event
745 schoenebeck 242 * @param iLayer - layer index for the new voice (optional - only
746     * in case of layered sounds of course)
747     * @param ReleaseTriggerVoice - if new voice is a release triggered voice
748     * (optional, default = false)
749 schoenebeck 250 * @param VoiceStealing - if voice stealing should be performed
750     * when there is no free voice
751     * (optional, default = true)
752 schoenebeck 668 * @param HandleKeyGroupConflicts - if voices should be killed due to a
753     * key group conflict
754 schoenebeck 250 * @returns pointer to new voice or NULL if there was no free voice or
755 schoenebeck 354 * if the voice wasn't triggered (for example when no region is
756     * defined for the given key).
757 schoenebeck 233 */
758 schoenebeck 668 Pool<Voice>::Iterator Engine::LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing, bool HandleKeyGroupConflicts) {
759 schoenebeck 669 int MIDIKey = itNoteOnEvent->Param.Note.Key;
760     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[MIDIKey];
761     ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(MIDIKey);
762 schoenebeck 233
763 schoenebeck 668 // if nothing defined for this key
764     if (!pRegion) return Pool<Voice>::Iterator(); // nothing to do
765    
766 schoenebeck 669 // only mark the first voice of a layered voice (group) to be in a
767     // key group, so the layered voices won't kill each other
768     int iKeyGroup = (iLayer == 0 && !ReleaseTriggerVoice) ? pRegion->KeyGroup : 0;
769    
770 schoenebeck 668 // handle key group (a.k.a. exclusive group) conflicts
771     if (HandleKeyGroupConflicts) {
772     if (iKeyGroup) { // if this voice / key belongs to a key group
773     uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[iKeyGroup];
774     if (*ppKeyGroup) { // if there's already an active key in that key group
775     midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[**ppKeyGroup];
776     // kill all voices on the (other) key
777     RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
778     RTList<Voice>::Iterator end = pOtherKey->pActiveVoices->end();
779     for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
780     if (itVoiceToBeKilled->Type != Voice::type_release_trigger) {
781     itVoiceToBeKilled->Kill(itNoteOnEvent);
782     --VoiceSpawnsLeft; //FIXME: just a hack, we should better check in StealVoice() if the voice was killed due to key conflict
783     }
784     }
785     }
786     }
787     }
788    
789 schoenebeck 669 Voice::type_t VoiceType = Voice::type_normal;
790    
791     // get current dimension values to select the right dimension region
792     //TODO: for stolen voices this dimension region selection block is processed twice, this should be changed
793     //FIXME: controller values for selecting the dimension region here are currently not sample accurate
794     uint DimValues[8] = { 0 };
795     for (int i = pRegion->Dimensions - 1; i >= 0; i--) {
796     switch (pRegion->pDimensionDefinitions[i].dimension) {
797     case ::gig::dimension_samplechannel:
798     DimValues[i] = 0; //TODO: we currently ignore this dimension
799     break;
800     case ::gig::dimension_layer:
801     DimValues[i] = iLayer;
802     break;
803     case ::gig::dimension_velocity:
804     DimValues[i] = itNoteOnEvent->Param.Note.Velocity;
805     break;
806     case ::gig::dimension_channelaftertouch:
807     DimValues[i] = 0; //TODO: we currently ignore this dimension
808     break;
809     case ::gig::dimension_releasetrigger:
810     VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;
811     DimValues[i] = (uint) ReleaseTriggerVoice;
812     break;
813     case ::gig::dimension_keyboard:
814     DimValues[i] = (uint) pEngineChannel->CurrentKeyDimension;
815     break;
816     case ::gig::dimension_roundrobin:
817     DimValues[i] = (uint) pEngineChannel->pMIDIKeyInfo[MIDIKey].RoundRobinIndex; // incremented for each note on
818     break;
819     case ::gig::dimension_random:
820     RandomSeed = RandomSeed * 1103515245 + 12345; // classic pseudo random number generator
821     DimValues[i] = (uint) RandomSeed >> (32 - pRegion->pDimensionDefinitions[i].bits); // highest bits are most random
822     break;
823     case ::gig::dimension_modwheel:
824     DimValues[i] = pEngineChannel->ControllerTable[1];
825     break;
826     case ::gig::dimension_breath:
827     DimValues[i] = pEngineChannel->ControllerTable[2];
828     break;
829     case ::gig::dimension_foot:
830     DimValues[i] = pEngineChannel->ControllerTable[4];
831     break;
832     case ::gig::dimension_portamentotime:
833     DimValues[i] = pEngineChannel->ControllerTable[5];
834     break;
835     case ::gig::dimension_effect1:
836     DimValues[i] = pEngineChannel->ControllerTable[12];
837     break;
838     case ::gig::dimension_effect2:
839     DimValues[i] = pEngineChannel->ControllerTable[13];
840     break;
841     case ::gig::dimension_genpurpose1:
842     DimValues[i] = pEngineChannel->ControllerTable[16];
843     break;
844     case ::gig::dimension_genpurpose2:
845     DimValues[i] = pEngineChannel->ControllerTable[17];
846     break;
847     case ::gig::dimension_genpurpose3:
848     DimValues[i] = pEngineChannel->ControllerTable[18];
849     break;
850     case ::gig::dimension_genpurpose4:
851     DimValues[i] = pEngineChannel->ControllerTable[19];
852     break;
853     case ::gig::dimension_sustainpedal:
854     DimValues[i] = pEngineChannel->ControllerTable[64];
855     break;
856     case ::gig::dimension_portamento:
857     DimValues[i] = pEngineChannel->ControllerTable[65];
858     break;
859     case ::gig::dimension_sostenutopedal:
860     DimValues[i] = pEngineChannel->ControllerTable[66];
861     break;
862     case ::gig::dimension_softpedal:
863     DimValues[i] = pEngineChannel->ControllerTable[67];
864     break;
865     case ::gig::dimension_genpurpose5:
866     DimValues[i] = pEngineChannel->ControllerTable[80];
867     break;
868     case ::gig::dimension_genpurpose6:
869     DimValues[i] = pEngineChannel->ControllerTable[81];
870     break;
871     case ::gig::dimension_genpurpose7:
872     DimValues[i] = pEngineChannel->ControllerTable[82];
873     break;
874     case ::gig::dimension_genpurpose8:
875     DimValues[i] = pEngineChannel->ControllerTable[83];
876     break;
877     case ::gig::dimension_effect1depth:
878     DimValues[i] = pEngineChannel->ControllerTable[91];
879     break;
880     case ::gig::dimension_effect2depth:
881     DimValues[i] = pEngineChannel->ControllerTable[92];
882     break;
883     case ::gig::dimension_effect3depth:
884     DimValues[i] = pEngineChannel->ControllerTable[93];
885     break;
886     case ::gig::dimension_effect4depth:
887     DimValues[i] = pEngineChannel->ControllerTable[94];
888     break;
889     case ::gig::dimension_effect5depth:
890     DimValues[i] = pEngineChannel->ControllerTable[95];
891     break;
892     case ::gig::dimension_none:
893     std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;
894     break;
895     default:
896     std::cerr << "gig::Engine::LaunchVoice() Error: Unknown dimension\n" << std::flush;
897     }
898     }
899     ::gig::DimensionRegion* pDimRgn = pRegion->GetDimensionRegionByValue(DimValues);
900    
901     // no need to continue if sample is silent
902     if (!pDimRgn->pSample || !pDimRgn->pSample->SamplesTotal) return Pool<Voice>::Iterator();
903    
904 schoenebeck 233 // allocate a new voice for the key
905 schoenebeck 271 Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
906     if (itNewVoice) {
907 schoenebeck 233 // launch the new voice
908 schoenebeck 669 if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pDimRgn, VoiceType, iKeyGroup) < 0) {
909 schoenebeck 354 dmsg(4,("Voice not triggered\n"));
910 schoenebeck 271 pKey->pActiveVoices->free(itNewVoice);
911 schoenebeck 233 }
912 schoenebeck 239 else { // on success
913 schoenebeck 663 --VoiceSpawnsLeft;
914 schoenebeck 239 if (!pKey->Active) { // mark as active key
915     pKey->Active = true;
916 schoenebeck 411 pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();
917 schoenebeck 271 *pKey->itSelf = itNoteOnEvent->Param.Note.Key;
918 schoenebeck 239 }
919 schoenebeck 271 if (itNewVoice->KeyGroup) {
920 schoenebeck 668 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];
921 schoenebeck 271 *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group
922 schoenebeck 239 }
923 schoenebeck 271 if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)
924     return itNewVoice; // success
925 schoenebeck 233 }
926     }
927 schoenebeck 285 else if (VoiceStealing) {
928 schoenebeck 460 // try to steal one voice
929 schoenebeck 473 int result = StealVoice(pEngineChannel, itNoteOnEvent);
930     if (!result) { // voice stolen successfully
931     // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died
932     RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();
933     if (itStealEvent) {
934     *itStealEvent = *itNoteOnEvent; // copy event
935     itStealEvent->Param.Note.Layer = iLayer;
936     itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;
937     pKey->VoiceTheftsQueued++;
938     }
939     else dmsg(1,("Voice stealing queue full!\n"));
940 schoenebeck 285 }
941     }
942    
943 schoenebeck 271 return Pool<Voice>::Iterator(); // no free voice or error
944 schoenebeck 233 }
945    
946     /**
947 schoenebeck 250 * Will be called by LaunchVoice() method in case there are no free
948     * voices left. This method will select and kill one old voice for
949     * voice stealing and postpone the note-on event until the selected
950     * voice actually died.
951     *
952 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
953 schoenebeck 285 * @param itNoteOnEvent - key, velocity and time stamp of the event
954 schoenebeck 473 * @returns 0 on success, a value < 0 if no active voice could be picked for voice stealing
955 schoenebeck 250 */
956 schoenebeck 473 int Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
957 schoenebeck 663 if (VoiceSpawnsLeft <= 0) {
958 schoenebeck 554 dmsg(1,("Max. voice thefts per audio fragment reached (you may raise CONFIG_MAX_VOICES).\n"));
959 schoenebeck 473 return -1;
960 schoenebeck 460 }
961 schoenebeck 271 if (!pEventPool->poolIsEmpty()) {
962 schoenebeck 250
963 schoenebeck 460 RTList<Voice>::Iterator itSelectedVoice;
964 schoenebeck 250
965     // Select one voice for voice stealing
966 schoenebeck 554 switch (CONFIG_VOICE_STEAL_ALGO) {
967 schoenebeck 250
968     // try to pick the oldest voice on the key where the new
969     // voice should be spawned, if there is no voice on that
970 schoenebeck 563 // key, or no voice left to kill, then procceed with
971 schoenebeck 250 // 'oldestkey' algorithm
972 schoenebeck 460 case voice_steal_algo_oldestvoiceonkey: {
973     midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
974 schoenebeck 563 itSelectedVoice = pSelectedKey->pActiveVoices->first();
975     // proceed iterating if voice was created in this fragment cycle
976 schoenebeck 663 while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
977 schoenebeck 563 // if we haven't found a voice then proceed with algorithm 'oldestkey'
978 schoenebeck 663 if (itSelectedVoice && itSelectedVoice->IsStealable()) break;
979 schoenebeck 250 } // no break - intentional !
980    
981     // try to pick the oldest voice on the oldest active key
982 schoenebeck 563 // from the same engine channel
983 schoenebeck 460 // (caution: must stay after 'oldestvoiceonkey' algorithm !)
984 schoenebeck 250 case voice_steal_algo_oldestkey: {
985 schoenebeck 649 // if we already stole in this fragment, try to proceed on same key
986 schoenebeck 460 if (this->itLastStolenVoice) {
987     itSelectedVoice = this->itLastStolenVoice;
988 schoenebeck 649 do {
989     ++itSelectedVoice;
990 schoenebeck 663 } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle
991 schoenebeck 649 // found a "stealable" voice ?
992 schoenebeck 663 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
993 schoenebeck 649 // remember which voice we stole, so we can simply proceed on next voice stealing
994     this->itLastStolenVoice = itSelectedVoice;
995 schoenebeck 460 break; // selection succeeded
996 schoenebeck 250 }
997     }
998 schoenebeck 649 // get (next) oldest key
999     RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKey) ? ++this->iuiLastStolenKey : pEngineChannel->pActiveKeys->first();
1000     while (iuiSelectedKey) {
1001     midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];
1002 schoenebeck 659 itSelectedVoice = pSelectedKey->pActiveVoices->first();
1003 schoenebeck 649 // proceed iterating if voice was created in this fragment cycle
1004 schoenebeck 663 while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
1005 schoenebeck 649 // found a "stealable" voice ?
1006 schoenebeck 663 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1007 schoenebeck 649 // remember which voice on which key we stole, so we can simply proceed on next voice stealing
1008     this->iuiLastStolenKey = iuiSelectedKey;
1009     this->itLastStolenVoice = itSelectedVoice;
1010     break; // selection succeeded
1011     }
1012     ++iuiSelectedKey; // get next oldest key
1013     }
1014 schoenebeck 250 break;
1015     }
1016    
1017     // don't steal anything
1018     case voice_steal_algo_none:
1019     default: {
1020     dmsg(1,("No free voice (voice stealing disabled)!\n"));
1021 schoenebeck 473 return -1;
1022 schoenebeck 250 }
1023     }
1024    
1025 schoenebeck 563 // if we couldn't steal a voice from the same engine channel then
1026     // steal oldest voice on the oldest key from any other engine channel
1027 schoenebeck 649 // (the smaller engine channel number, the higher priority)
1028 schoenebeck 663 if (!itSelectedVoice || !itSelectedVoice->IsStealable()) {
1029 schoenebeck 649 EngineChannel* pSelectedChannel;
1030     int iChannelIndex;
1031     // select engine channel
1032     if (pLastStolenChannel) {
1033     pSelectedChannel = pLastStolenChannel;
1034     iChannelIndex = pSelectedChannel->iEngineIndexSelf;
1035     } else { // pick the engine channel followed by this engine channel
1036     iChannelIndex = (pEngineChannel->iEngineIndexSelf + 1) % engineChannels.size();
1037     pSelectedChannel = engineChannels[iChannelIndex];
1038     }
1039 schoenebeck 663
1040     // if we already stole in this fragment, try to proceed on same key
1041     if (this->itLastStolenVoiceGlobally) {
1042     itSelectedVoice = this->itLastStolenVoiceGlobally;
1043     do {
1044     ++itSelectedVoice;
1045     } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle
1046     }
1047    
1048     #if CONFIG_DEVMODE
1049     EngineChannel* pBegin = pSelectedChannel; // to detect endless loop
1050     #endif // CONFIG_DEVMODE
1051    
1052     // did we find a 'stealable' voice?
1053     if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1054     // remember which voice we stole, so we can simply proceed on next voice stealing
1055     this->itLastStolenVoiceGlobally = itSelectedVoice;
1056     } else while (true) { // iterate through engine channels
1057 schoenebeck 649 // get (next) oldest key
1058 schoenebeck 663 RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKeyGlobally) ? ++this->iuiLastStolenKeyGlobally : pSelectedChannel->pActiveKeys->first();
1059     this->iuiLastStolenKeyGlobally = RTList<uint>::Iterator(); // to prevent endless loop (see line above)
1060 schoenebeck 649 while (iuiSelectedKey) {
1061 schoenebeck 663 midi_key_info_t* pSelectedKey = &pSelectedChannel->pMIDIKeyInfo[*iuiSelectedKey];
1062 schoenebeck 649 itSelectedVoice = pSelectedKey->pActiveVoices->first();
1063     // proceed iterating if voice was created in this fragment cycle
1064 schoenebeck 663 while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;
1065 schoenebeck 649 // found a "stealable" voice ?
1066 schoenebeck 663 if (itSelectedVoice && itSelectedVoice->IsStealable()) {
1067 schoenebeck 649 // remember which voice on which key on which engine channel we stole, so we can simply proceed on next voice stealing
1068     this->iuiLastStolenKeyGlobally = iuiSelectedKey;
1069     this->itLastStolenVoiceGlobally = itSelectedVoice;
1070     this->pLastStolenChannel = pSelectedChannel;
1071 schoenebeck 665 goto stealable_voice_found; // selection succeeded
1072 schoenebeck 649 }
1073     ++iuiSelectedKey; // get next key on current engine channel
1074     }
1075     // get next engine channel
1076 schoenebeck 460 iChannelIndex = (iChannelIndex + 1) % engineChannels.size();
1077 schoenebeck 649 pSelectedChannel = engineChannels[iChannelIndex];
1078 schoenebeck 663
1079     #if CONFIG_DEVMODE
1080     if (pSelectedChannel == pBegin) {
1081     dmsg(1,("FATAL ERROR: voice stealing endless loop!\n"));
1082     dmsg(1,("VoiceSpawnsLeft=%d.\n", VoiceSpawnsLeft));
1083     dmsg(1,("Exiting.\n"));
1084     exit(-1);
1085     }
1086     #endif // CONFIG_DEVMODE
1087 schoenebeck 460 }
1088     }
1089    
1090 schoenebeck 665 // jump point if a 'stealable' voice was found
1091     stealable_voice_found:
1092    
1093 schoenebeck 563 #if CONFIG_DEVMODE
1094 schoenebeck 473 if (!itSelectedVoice->IsActive()) {
1095     dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));
1096     return -1;
1097     }
1098 schoenebeck 563 #endif // CONFIG_DEVMODE
1099 schoenebeck 287
1100 schoenebeck 250 // now kill the selected voice
1101 schoenebeck 659 itSelectedVoice->Kill(itNoteOnEvent);
1102 schoenebeck 460
1103 schoenebeck 663 --VoiceSpawnsLeft;
1104 schoenebeck 473
1105     return 0; // success
1106 schoenebeck 250 }
1107 schoenebeck 473 else {
1108     dmsg(1,("Event pool emtpy!\n"));
1109     return -1;
1110     }
1111 schoenebeck 250 }
1112    
1113     /**
1114 schoenebeck 285 * Removes the given voice from the MIDI key's list of active voices.
1115     * This method will be called when a voice went inactive, e.g. because
1116     * it finished to playback its sample, finished its release stage or
1117     * just was killed.
1118 schoenebeck 53 *
1119 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
1120 schoenebeck 285 * @param itVoice - points to the voice to be freed
1121 schoenebeck 53 */
1122 schoenebeck 411 void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) {
1123 schoenebeck 271 if (itVoice) {
1124 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoice->MIDIKey];
1125 schoenebeck 53
1126 schoenebeck 271 uint keygroup = itVoice->KeyGroup;
1127    
1128 schoenebeck 53 // free the voice object
1129 schoenebeck 271 pVoicePool->free(itVoice);
1130 schoenebeck 53
1131 schoenebeck 287 // if no other voices left and member of a key group, remove from key group
1132     if (pKey->pActiveVoices->isEmpty() && keygroup) {
1133 schoenebeck 411 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[keygroup];
1134 schoenebeck 287 if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group
1135 schoenebeck 53 }
1136     }
1137 schoenebeck 285 else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;
1138 schoenebeck 53 }
1139    
1140     /**
1141 schoenebeck 287 * Called when there's no more voice left on a key, this call will
1142     * update the key info respectively.
1143     *
1144 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
1145 schoenebeck 287 * @param pKey - key which is now inactive
1146     */
1147 schoenebeck 411 void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) {
1148 schoenebeck 287 if (pKey->pActiveVoices->isEmpty()) {
1149     pKey->Active = false;
1150 schoenebeck 411 pEngineChannel->pActiveKeys->free(pKey->itSelf); // remove key from list of active keys
1151 schoenebeck 287 pKey->itSelf = RTList<uint>::Iterator();
1152     pKey->ReleaseTrigger = false;
1153     pKey->pEvents->clear();
1154     dmsg(3,("Key has no more voices now\n"));
1155     }
1156     else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n"));
1157     }
1158    
1159     /**
1160 schoenebeck 53 * Reacts on supported control change commands (e.g. pitch bend wheel,
1161     * modulation wheel, aftertouch).
1162     *
1163 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
1164 schoenebeck 271 * @param itControlChangeEvent - controller, value and time stamp of the event
1165 schoenebeck 53 */
1166 schoenebeck 411 void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) {
1167 schoenebeck 271 dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
1168 schoenebeck 53
1169 schoenebeck 473 // update controller value in the engine channel's controller table
1170     pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
1171    
1172     // move event from the unsorted event list to the control change event list
1173     Pool<Event>::Iterator itControlChangeEventOnCCList = itControlChangeEvent.moveToEndOf(pEngineChannel->pCCEvents);
1174    
1175     switch (itControlChangeEventOnCCList->Param.CC.Controller) {
1176 schoenebeck 424 case 7: { // volume
1177     //TODO: not sample accurate yet
1178 schoenebeck 473 pEngineChannel->GlobalVolume = (float) itControlChangeEventOnCCList->Param.CC.Value / 127.0f;
1179 schoenebeck 660 pEngineChannel->bStatusChanged = true; // engine channel status has changed, so set notify flag
1180 schoenebeck 424 break;
1181     }
1182     case 10: { // panpot
1183     //TODO: not sample accurate yet
1184 schoenebeck 473 const int pan = (int) itControlChangeEventOnCCList->Param.CC.Value - 64;
1185 schoenebeck 424 pEngineChannel->GlobalPanLeft = 1.0f - float(RTMath::Max(pan, 0)) / 63.0f;
1186     pEngineChannel->GlobalPanRight = 1.0f - float(RTMath::Min(pan, 0)) / -64.0f;
1187     break;
1188     }
1189     case 64: { // sustain
1190 schoenebeck 473 if (itControlChangeEventOnCCList->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {
1191 schoenebeck 53 dmsg(4,("PEDAL DOWN\n"));
1192 schoenebeck 411 pEngineChannel->SustainPedal = true;
1193 schoenebeck 53
1194 iliev 716 #if !CONFIG_PROCESS_MUTED_CHANNELS
1195 schoenebeck 705 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1196 iliev 716 #endif
1197 schoenebeck 705
1198 schoenebeck 53 // cancel release process of voices if necessary
1199 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1200 schoenebeck 473 for (; iuiKey; ++iuiKey) {
1201     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1202     if (!pKey->KeyPressed) {
1203     RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1204     if (itNewEvent) {
1205     *itNewEvent = *itControlChangeEventOnCCList; // copy event to the key's own event list
1206     itNewEvent->Type = Event::type_cancel_release; // transform event type
1207 schoenebeck 53 }
1208 schoenebeck 473 else dmsg(1,("Event pool emtpy!\n"));
1209 schoenebeck 53 }
1210     }
1211     }
1212 schoenebeck 473 if (itControlChangeEventOnCCList->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {
1213 schoenebeck 53 dmsg(4,("PEDAL UP\n"));
1214 schoenebeck 411 pEngineChannel->SustainPedal = false;
1215 schoenebeck 53
1216 iliev 716 #if !CONFIG_PROCESS_MUTED_CHANNELS
1217 schoenebeck 705 if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted
1218 iliev 716 #endif
1219 schoenebeck 705
1220 schoenebeck 53 // release voices if their respective key is not pressed
1221 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1222 schoenebeck 473 for (; iuiKey; ++iuiKey) {
1223     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1224     if (!pKey->KeyPressed) {
1225     RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1226     if (itNewEvent) {
1227     *itNewEvent = *itControlChangeEventOnCCList; // copy event to the key's own event list
1228     itNewEvent->Type = Event::type_release; // transform event type
1229 schoenebeck 53 }
1230 schoenebeck 473 else dmsg(1,("Event pool emtpy!\n"));
1231 schoenebeck 53 }
1232     }
1233     }
1234     break;
1235     }
1236    
1237    
1238 schoenebeck 473 // Channel Mode Messages
1239    
1240     case 120: { // all sound off
1241     KillAllVoices(pEngineChannel, itControlChangeEventOnCCList);
1242     break;
1243     }
1244     case 121: { // reset all controllers
1245     pEngineChannel->ResetControllers();
1246     break;
1247     }
1248     case 123: { // all notes off
1249     ReleaseAllVoices(pEngineChannel, itControlChangeEventOnCCList);
1250     break;
1251     }
1252     }
1253 schoenebeck 53 }
1254    
1255     /**
1256 schoenebeck 244 * Reacts on MIDI system exclusive messages.
1257     *
1258 schoenebeck 271 * @param itSysexEvent - sysex data size and time stamp of the sysex event
1259 schoenebeck 244 */
1260 schoenebeck 271 void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {
1261 schoenebeck 244 RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader();
1262    
1263     uint8_t exclusive_status, id;
1264     if (!reader.pop(&exclusive_status)) goto free_sysex_data;
1265     if (!reader.pop(&id)) goto free_sysex_data;
1266     if (exclusive_status != 0xF0) goto free_sysex_data;
1267    
1268     switch (id) {
1269     case 0x41: { // Roland
1270 schoenebeck 493 dmsg(3,("Roland Sysex\n"));
1271 schoenebeck 244 uint8_t device_id, model_id, cmd_id;
1272     if (!reader.pop(&device_id)) goto free_sysex_data;
1273     if (!reader.pop(&model_id)) goto free_sysex_data;
1274     if (!reader.pop(&cmd_id)) goto free_sysex_data;
1275     if (model_id != 0x42 /*GS*/) goto free_sysex_data;
1276     if (cmd_id != 0x12 /*DT1*/) goto free_sysex_data;
1277    
1278     // command address
1279     uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB)
1280     const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later
1281     if (reader.read(&addr[0], 3) != 3) goto free_sysex_data;
1282     if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters
1283 schoenebeck 493 dmsg(3,("\tSystem Parameter\n"));
1284 schoenebeck 244 }
1285     else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters
1286 schoenebeck 493 dmsg(3,("\tCommon Parameter\n"));
1287 schoenebeck 244 }
1288     else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)
1289 schoenebeck 493 dmsg(3,("\tPart Parameter\n"));
1290     switch (addr[2]) {
1291 schoenebeck 244 case 0x40: { // scale tuning
1292 schoenebeck 493 dmsg(3,("\t\tScale Tuning\n"));
1293 schoenebeck 244 uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave
1294     if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data;
1295     uint8_t checksum;
1296 schoenebeck 493 if (!reader.pop(&checksum)) goto free_sysex_data;
1297 schoenebeck 563 #if CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1298     if (GSCheckSum(checksum_reader, 12)) goto free_sysex_data;
1299     #endif // CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1300 schoenebeck 244 for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;
1301     AdjustScale((int8_t*) scale_tunes);
1302 schoenebeck 493 dmsg(3,("\t\t\tNew scale applied.\n"));
1303 schoenebeck 244 break;
1304     }
1305     }
1306     }
1307     else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)
1308     }
1309     else if (addr[0] == 0x41) { // Drum Setup Parameters
1310     }
1311     break;
1312     }
1313     }
1314    
1315     free_sysex_data: // finally free sysex data
1316 schoenebeck 271 pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);
1317 schoenebeck 244 }
1318    
1319     /**
1320     * Calculates the Roland GS sysex check sum.
1321     *
1322     * @param AddrReader - reader which currently points to the first GS
1323     * command address byte of the GS sysex message in
1324     * question
1325     * @param DataSize - size of the GS message data (in bytes)
1326     */
1327     uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) {
1328     RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader;
1329     uint bytes = 3 /*addr*/ + DataSize;
1330     uint8_t addr_and_data[bytes];
1331     reader.read(&addr_and_data[0], bytes);
1332     uint8_t sum = 0;
1333     for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];
1334     return 128 - sum % 128;
1335     }
1336    
1337     /**
1338     * Allows to tune each of the twelve semitones of an octave.
1339     *
1340     * @param ScaleTunes - detuning of all twelve semitones (in cents)
1341     */
1342     void Engine::AdjustScale(int8_t ScaleTunes[12]) {
1343     memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate
1344     }
1345    
1346     /**
1347 schoenebeck 473 * Releases all voices on an engine channel. All voices will go into
1348     * the release stage and thus it might take some time (e.g. dependant to
1349     * their envelope release time) until they actually die.
1350     *
1351     * @param pEngineChannel - engine channel on which all voices should be released
1352     * @param itReleaseEvent - event which caused this releasing of all voices
1353     */
1354     void Engine::ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent) {
1355     RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1356     while (iuiKey) {
1357     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1358     ++iuiKey;
1359     // append a 'release' event to the key's own event list
1360     RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1361     if (itNewEvent) {
1362     *itNewEvent = *itReleaseEvent; // copy original event (to the key's event list)
1363     itNewEvent->Type = Event::type_release; // transform event type
1364     }
1365     else dmsg(1,("Event pool emtpy!\n"));
1366     }
1367     }
1368    
1369     /**
1370     * Kills all voices on an engine channel as soon as possible. Voices
1371     * won't get into release state, their volume level will be ramped down
1372     * as fast as possible.
1373     *
1374     * @param pEngineChannel - engine channel on which all voices should be killed
1375     * @param itKillEvent - event which caused this killing of all voices
1376     */
1377     void Engine::KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent) {
1378     RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1379     RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
1380     while (iuiKey != end) { // iterate through all active keys
1381     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1382     ++iuiKey;
1383     RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
1384     RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
1385     for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
1386     itVoice->Kill(itKillEvent);
1387 schoenebeck 663 --VoiceSpawnsLeft; //FIXME: just a temporary workaround, we should check the cause in StealVoice() instead
1388 schoenebeck 473 }
1389     }
1390     }
1391    
1392     /**
1393 schoenebeck 53 * Initialize the parameter sequence for the modulation destination given by
1394     * by 'dst' with the constant value given by val.
1395     */
1396     void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) {
1397     int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle();
1398 schoenebeck 80 float* m = &pSynthesisParameters[dst][0];
1399     for (int i = 0; i < maxsamples; i += 4) {
1400     m[i] = val;
1401     m[i+1] = val;
1402     m[i+2] = val;
1403     m[i+3] = val;
1404     }
1405 persson 438 }
1406 schoenebeck 53
1407     uint Engine::VoiceCount() {
1408     return ActiveVoiceCount;
1409     }
1410    
1411     uint Engine::VoiceCountMax() {
1412     return ActiveVoiceCountMax;
1413     }
1414    
1415     bool Engine::DiskStreamSupported() {
1416     return true;
1417     }
1418    
1419     uint Engine::DiskStreamCount() {
1420     return (pDiskThread) ? pDiskThread->ActiveStreamCount : 0;
1421     }
1422    
1423     uint Engine::DiskStreamCountMax() {
1424     return (pDiskThread) ? pDiskThread->ActiveStreamCountMax : 0;
1425     }
1426    
1427     String Engine::DiskStreamBufferFillBytes() {
1428     return pDiskThread->GetBufferFillBytes();
1429     }
1430    
1431     String Engine::DiskStreamBufferFillPercentage() {
1432     return pDiskThread->GetBufferFillPercentage();
1433     }
1434    
1435 senkov 112 String Engine::EngineName() {
1436 schoenebeck 475 return LS_GIG_ENGINE_NAME;
1437 senkov 112 }
1438    
1439 schoenebeck 53 String Engine::Description() {
1440     return "Gigasampler Engine";
1441     }
1442    
1443     String Engine::Version() {
1444 iliev 716 String s = "$Revision: 1.51 $";
1445 schoenebeck 123 return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
1446 schoenebeck 53 }
1447    
1448     }} // namespace LinuxSampler::gig

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