/[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 649 - (hide annotations) (download)
Wed Jun 15 00:01:28 2005 UTC (18 years, 9 months ago) by schoenebeck
File size: 59443 byte(s)
* revised voice stealing (fixes crash caused by voice stealing)

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     }
123    
124 schoenebeck 473 /**
125     * Destructor
126     */
127 schoenebeck 53 Engine::~Engine() {
128     if (pDiskThread) {
129 senkov 329 dmsg(1,("Stopping disk thread..."));
130 schoenebeck 53 pDiskThread->StopThread();
131     delete pDiskThread;
132 senkov 329 dmsg(1,("OK\n"));
133 schoenebeck 53 }
134     if (pEventQueue) delete pEventQueue;
135     if (pEventPool) delete pEventPool;
136 schoenebeck 411 if (pVoicePool) {
137     pVoicePool->clear();
138     delete pVoicePool;
139     }
140 schoenebeck 53 if (pEventGenerator) delete pEventGenerator;
141 schoenebeck 80 if (pMainFilterParameters) delete[] pMainFilterParameters;
142     if (pBasicFilterParameters) delete[] pBasicFilterParameters;
143 schoenebeck 319 if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
144 schoenebeck 250 if (pVoiceStealingQueue) delete pVoiceStealingQueue;
145 schoenebeck 411 if (pSysexBuffer) delete pSysexBuffer;
146 schoenebeck 420 EngineFactory::Destroy(this);
147 schoenebeck 53 }
148    
149     void Engine::Enable() {
150     dmsg(3,("gig::Engine: enabling\n"));
151     EngineDisabled.PushAndUnlock(false, 2); // set condition object 'EngineDisabled' to false (wait max. 2s)
152 schoenebeck 64 dmsg(3,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe()));
153 schoenebeck 53 }
154    
155     void Engine::Disable() {
156     dmsg(3,("gig::Engine: disabling\n"));
157     bool* pWasDisabled = EngineDisabled.PushAndUnlock(true, 2); // wait max. 2s
158     if (!pWasDisabled) dmsg(3,("gig::Engine warning: Timeout waiting to disable engine.\n"));
159     }
160    
161     void Engine::DisableAndLock() {
162     dmsg(3,("gig::Engine: disabling\n"));
163     bool* pWasDisabled = EngineDisabled.Push(true, 2); // wait max. 2s
164     if (!pWasDisabled) dmsg(3,("gig::Engine warning: Timeout waiting to disable engine.\n"));
165     }
166    
167     /**
168     * Reset all voices and disk thread and clear input event queue and all
169     * control and status variables.
170     */
171     void Engine::Reset() {
172     DisableAndLock();
173     ResetInternal();
174     Enable();
175     }
176    
177     /**
178     * Reset all voices and disk thread and clear input event queue and all
179     * control and status variables. This method is not thread safe!
180     */
181     void Engine::ResetInternal() {
182     ActiveVoiceCount = 0;
183     ActiveVoiceCountMax = 0;
184    
185 schoenebeck 250 // reset voice stealing parameters
186     pVoiceStealingQueue->clear();
187 schoenebeck 649 itLastStolenVoice = RTList<Voice>::Iterator();
188     itLastStolenVoiceGlobally = RTList<Voice>::Iterator();
189     iuiLastStolenKey = RTList<uint>::Iterator();
190     iuiLastStolenKeyGlobally = RTList<uint>::Iterator();
191     pLastStolenChannel = NULL;
192 schoenebeck 250
193 schoenebeck 244 // reset to normal chromatic scale (means equal temper)
194     memset(&ScaleTuning[0], 0x00, 12);
195    
196 schoenebeck 53 // reset all voices
197 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
198     iterVoice->Reset();
199 schoenebeck 53 }
200     pVoicePool->clear();
201    
202     // reset disk thread
203     if (pDiskThread) pDiskThread->Reset();
204    
205     // delete all input events
206     pEventQueue->init();
207 persson 438 }
208 schoenebeck 53
209 schoenebeck 473 /**
210     * Connect this engine instance with the given audio output device.
211     * This method will be called when an Engine instance is created.
212     * All of the engine's data structures which are dependant to the used
213     * audio output device / driver will be (re)allocated and / or
214     * adjusted appropriately.
215     *
216     * @param pAudioOut - audio output device to connect to
217     */
218 schoenebeck 53 void Engine::Connect(AudioOutputDevice* pAudioOut) {
219     pAudioOutputDevice = pAudioOut;
220    
221     ResetInternal();
222    
223     // inform audio driver for the need of two channels
224     try {
225     pAudioOutputDevice->AcquireChannels(2); // gig engine only stereo
226     }
227     catch (AudioOutputException e) {
228     String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message();
229     throw LinuxSamplerException(msg);
230     }
231 persson 438
232 schoenebeck 460 this->MaxSamplesPerCycle = pAudioOutputDevice->MaxSamplesPerCycle();
233     this->SampleRate = pAudioOutputDevice->SampleRate();
234 schoenebeck 225
235 schoenebeck 285 // FIXME: audio drivers with varying fragment sizes might be a problem here
236 schoenebeck 554 MaxFadeOutPos = MaxSamplesPerCycle - int(double(SampleRate) * CONFIG_EG_MIN_RELEASE_TIME) - 1;
237 schoenebeck 285 if (MaxFadeOutPos < 0)
238 schoenebeck 554 throw LinuxSamplerException("CONFIG_EG_MIN_RELEASE_TIME too big for current audio fragment size / sampling rate!");
239 schoenebeck 285
240 schoenebeck 53 // (re)create disk thread
241     if (this->pDiskThread) {
242 senkov 329 dmsg(1,("Stopping disk thread..."));
243 schoenebeck 53 this->pDiskThread->StopThread();
244     delete this->pDiskThread;
245 senkov 329 dmsg(1,("OK\n"));
246 schoenebeck 53 }
247 schoenebeck 554 this->pDiskThread = new DiskThread(((pAudioOut->MaxSamplesPerCycle() << CONFIG_MAX_PITCH) << 1) + 6); //FIXME: assuming stereo
248 schoenebeck 53 if (!pDiskThread) {
249     dmsg(0,("gig::Engine new diskthread = NULL\n"));
250     exit(EXIT_FAILURE);
251     }
252    
253 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
254     iterVoice->pDiskThread = this->pDiskThread;
255 schoenebeck 53 dmsg(3,("d"));
256     }
257     pVoicePool->clear();
258    
259     // (re)create event generator
260     if (pEventGenerator) delete pEventGenerator;
261     pEventGenerator = new EventGenerator(pAudioOut->SampleRate());
262    
263     // (re)allocate synthesis parameter matrix
264 schoenebeck 319 if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
265 schoenebeck 361
266     #if defined(__APPLE__)
267     pSynthesisParameters[0] = (float *) malloc(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle());
268     #else
269 schoenebeck 319 pSynthesisParameters[0] = (float *) memalign(16,(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle()));
270 schoenebeck 361 #endif
271 schoenebeck 53 for (int dst = 1; dst < Event::destination_count; dst++)
272     pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();
273    
274 schoenebeck 80 // (re)allocate biquad filter parameter sequence
275     if (pBasicFilterParameters) delete[] pBasicFilterParameters;
276     if (pMainFilterParameters) delete[] pMainFilterParameters;
277     pBasicFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];
278     pMainFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];
279    
280 schoenebeck 53 dmsg(1,("Starting disk thread..."));
281     pDiskThread->StartThread();
282     dmsg(1,("OK\n"));
283    
284 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
285     if (!iterVoice->pDiskThread) {
286 schoenebeck 53 dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));
287     exit(EXIT_FAILURE);
288     }
289     }
290     }
291    
292 schoenebeck 473 /**
293     * Clear all engine global event lists.
294     */
295 schoenebeck 412 void Engine::ClearEventLists() {
296 schoenebeck 460 pGlobalEvents->clear();
297 schoenebeck 412 }
298    
299 schoenebeck 53 /**
300 schoenebeck 460 * Copy all events from the engine's global input queue buffer to the
301     * engine's internal event list. This will be done at the beginning of
302     * each audio cycle (that is each RenderAudio() call) to distinguish
303     * all global events which have to be processed in the current audio
304     * cycle. These events are usually just SysEx messages. Every
305     * EngineChannel has it's own input event queue buffer and event list
306     * to handle common events like NoteOn, NoteOff and ControlChange
307     * events.
308 schoenebeck 412 *
309 schoenebeck 460 * @param Samples - number of sample points to be processed in the
310     * current audio cycle
311 schoenebeck 412 */
312 schoenebeck 460 void Engine::ImportEvents(uint Samples) {
313 schoenebeck 412 RingBuffer<Event>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader();
314     Event* pEvent;
315     while (true) {
316     // get next event from input event queue
317     if (!(pEvent = eventQueueReader.pop())) break;
318     // if younger event reached, ignore that and all subsequent ones for now
319     if (pEvent->FragmentPos() >= Samples) {
320     eventQueueReader--;
321     dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples));
322     pEvent->ResetFragmentPos();
323     break;
324     }
325     // copy event to internal event list
326 schoenebeck 460 if (pGlobalEvents->poolIsEmpty()) {
327 schoenebeck 412 dmsg(1,("Event pool emtpy!\n"));
328     break;
329     }
330 schoenebeck 460 *pGlobalEvents->allocAppend() = *pEvent;
331 schoenebeck 412 }
332     eventQueueReader.free(); // free all copied events from input queue
333 persson 438 }
334 schoenebeck 412
335     /**
336 schoenebeck 53 * Let this engine proceed to render the given amount of sample points. The
337     * calculated audio data of all voices of this engine will be placed into
338     * the engine's audio sum buffer which has to be copied and eventually be
339     * converted to the appropriate value range by the audio output class (e.g.
340     * AlsaIO or JackIO) right after.
341     *
342     * @param Samples - number of sample points to be rendered
343     * @returns 0 on success
344     */
345 schoenebeck 412 int Engine::RenderAudio(uint Samples) {
346 schoenebeck 53 dmsg(5,("RenderAudio(Samples=%d)\n", Samples));
347    
348 schoenebeck 412 // return if engine disabled
349 schoenebeck 53 if (EngineDisabled.Pop()) {
350     dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));
351     return 0;
352     }
353    
354 schoenebeck 293 // update time of start and end of this audio fragment (as events' time stamps relate to this)
355     pEventGenerator->UpdateFragmentTime(Samples);
356    
357 schoenebeck 412 // get all events from the engine's global input event queue which belong to the current fragment
358     // (these are usually just SysEx messages)
359 schoenebeck 460 ImportEvents(Samples);
360 schoenebeck 412
361     // process engine global events (these are currently only MIDI System Exclusive messages)
362     {
363 schoenebeck 460 RTList<Event>::Iterator itEvent = pGlobalEvents->first();
364     RTList<Event>::Iterator end = pGlobalEvents->end();
365 schoenebeck 412 for (; itEvent != end; ++itEvent) {
366     switch (itEvent->Type) {
367     case Event::type_sysex:
368     dmsg(5,("Engine: Sysex received\n"));
369     ProcessSysex(itEvent);
370     break;
371     }
372     }
373 schoenebeck 53 }
374 schoenebeck 412
375 schoenebeck 554 // We only allow a maximum of CONFIG_MAX_VOICES voices to be stolen
376 schoenebeck 460 // in each audio fragment. All subsequent request for spawning new
377     // voices in the same audio fragment will be ignored.
378 schoenebeck 554 VoiceTheftsLeft = CONFIG_MAX_VOICES;
379 schoenebeck 460
380 schoenebeck 412 // reset internal voice counter (just for statistic of active voices)
381     ActiveVoiceCountTemp = 0;
382    
383 schoenebeck 460
384 schoenebeck 466 // handle events on all engine channels
385 schoenebeck 460 for (int i = 0; i < engineChannels.size(); i++) {
386     if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
387     ProcessEvents(engineChannels[i], Samples);
388 schoenebeck 466 }
389    
390     // render all 'normal', active voices on all engine channels
391     for (int i = 0; i < engineChannels.size(); i++) {
392     if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
393 schoenebeck 460 RenderActiveVoices(engineChannels[i], Samples);
394 schoenebeck 412 }
395    
396 schoenebeck 460 // now that all ordinary voices on ALL engine channels are rendered, render new stolen voices
397     RenderStolenVoices(Samples);
398    
399     // handle cleanup on all engine channels for the next audio fragment
400     for (int i = 0; i < engineChannels.size(); i++) {
401     if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
402     PostProcess(engineChannels[i]);
403     }
404    
405    
406     // empty the engine's event list for the next audio fragment
407     ClearEventLists();
408    
409     // reset voice stealing for the next audio fragment
410     pVoiceStealingQueue->clear();
411    
412 schoenebeck 412 // just some statistics about this engine instance
413     ActiveVoiceCount = ActiveVoiceCountTemp;
414     if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;
415    
416 persson 630 FrameTime += Samples;
417    
418 schoenebeck 412 return 0;
419     }
420    
421 schoenebeck 473 /**
422     * Dispatch and handle all events in this audio fragment for the given
423     * engine channel.
424     *
425     * @param pEngineChannel - engine channel on which events should be
426     * processed
427     * @param Samples - amount of sample points to be processed in
428     * this audio fragment cycle
429     */
430 schoenebeck 460 void Engine::ProcessEvents(EngineChannel* pEngineChannel, uint Samples) {
431 schoenebeck 412 // get all events from the engine channels's input event queue which belong to the current fragment
432     // (these are the common events like NoteOn, NoteOff, ControlChange, etc.)
433 schoenebeck 460 pEngineChannel->ImportEvents(Samples);
434 schoenebeck 53
435     // process events
436 schoenebeck 271 {
437 schoenebeck 460 RTList<Event>::Iterator itEvent = pEngineChannel->pEvents->first();
438     RTList<Event>::Iterator end = pEngineChannel->pEvents->end();
439 schoenebeck 271 for (; itEvent != end; ++itEvent) {
440     switch (itEvent->Type) {
441     case Event::type_note_on:
442     dmsg(5,("Engine: Note on received\n"));
443 schoenebeck 412 ProcessNoteOn((EngineChannel*)itEvent->pEngineChannel, itEvent);
444 schoenebeck 271 break;
445     case Event::type_note_off:
446     dmsg(5,("Engine: Note off received\n"));
447 schoenebeck 412 ProcessNoteOff((EngineChannel*)itEvent->pEngineChannel, itEvent);
448 schoenebeck 271 break;
449     case Event::type_control_change:
450     dmsg(5,("Engine: MIDI CC received\n"));
451 schoenebeck 412 ProcessControlChange((EngineChannel*)itEvent->pEngineChannel, itEvent);
452 schoenebeck 271 break;
453     case Event::type_pitchbend:
454     dmsg(5,("Engine: Pitchbend received\n"));
455 schoenebeck 412 ProcessPitchbend((EngineChannel*)itEvent->pEngineChannel, itEvent);
456 schoenebeck 271 break;
457     }
458 schoenebeck 53 }
459     }
460 schoenebeck 649
461     // reset voice stealing for the next engine channel (or next audio fragment)
462     itLastStolenVoice = RTList<Voice>::Iterator();
463     itLastStolenVoiceGlobally = RTList<Voice>::Iterator();
464     iuiLastStolenKey = RTList<uint>::Iterator();
465     iuiLastStolenKeyGlobally = RTList<uint>::Iterator();
466     pLastStolenChannel = NULL;
467 schoenebeck 460 }
468 schoenebeck 53
469 schoenebeck 473 /**
470     * Render all 'normal' voices (that is voices which were not stolen in
471     * this fragment) on the given engine channel.
472     *
473     * @param pEngineChannel - engine channel on which audio should be
474     * rendered
475     * @param Samples - amount of sample points to be rendered in
476     * this audio fragment cycle
477     */
478 schoenebeck 460 void Engine::RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples) {
479     RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
480     RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
481     while (iuiKey != end) { // iterate through all active keys
482     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
483     ++iuiKey;
484 schoenebeck 53
485 schoenebeck 460 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
486     RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
487     for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
488     // now render current voice
489     itVoice->Render(Samples);
490     if (itVoice->IsActive()) ActiveVoiceCountTemp++; // still active
491     else { // voice reached end, is now inactive
492     FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices
493 schoenebeck 53 }
494     }
495     }
496 schoenebeck 460 }
497 schoenebeck 53
498 schoenebeck 473 /**
499     * Render all stolen voices (only voices which were stolen in this
500     * fragment) on the given engine channel. Stolen voices are rendered
501     * after all normal voices have been rendered; this is needed to render
502     * audio of those voices which were selected for voice stealing until
503     * the point were the stealing (that is the take over of the voice)
504     * actually happened.
505     *
506     * @param pEngineChannel - engine channel on which audio should be
507     * rendered
508     * @param Samples - amount of sample points to be rendered in
509     * this audio fragment cycle
510     */
511 schoenebeck 460 void Engine::RenderStolenVoices(uint Samples) {
512     RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();
513     RTList<Event>::Iterator end = pVoiceStealingQueue->end();
514     for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {
515     EngineChannel* pEngineChannel = (EngineChannel*) itVoiceStealEvent->pEngineChannel;
516     Pool<Voice>::Iterator itNewVoice =
517     LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false);
518     if (itNewVoice) {
519     itNewVoice->Render(Samples);
520     if (itNewVoice->IsActive()) ActiveVoiceCountTemp++; // still active
521     else { // voice reached end, is now inactive
522     FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices
523 schoenebeck 250 }
524     }
525 schoenebeck 460 else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));
526 schoenebeck 473
527     // we need to clear the key's event list explicitly here in case key was never active
528     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoiceStealEvent->Param.Note.Key];
529     pKey->VoiceTheftsQueued--;
530     if (!pKey->Active && !pKey->VoiceTheftsQueued) pKey->pEvents->clear();
531 schoenebeck 250 }
532 schoenebeck 460 }
533 schoenebeck 250
534 schoenebeck 473 /**
535     * Free all keys which have turned inactive in this audio fragment, from
536     * the list of active keys and clear all event lists on that engine
537     * channel.
538     *
539     * @param pEngineChannel - engine channel to cleanup
540     */
541 schoenebeck 460 void Engine::PostProcess(EngineChannel* pEngineChannel) {
542 schoenebeck 287 // free all keys which have no active voices left
543     {
544 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
545     RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
546 schoenebeck 287 while (iuiKey != end) { // iterate through all active keys
547 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
548 schoenebeck 287 ++iuiKey;
549 schoenebeck 411 if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);
550 schoenebeck 554 #if CONFIG_DEVMODE
551 schoenebeck 563 else { // just a sanity check for debugging
552 schoenebeck 287 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
553     RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
554     for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
555     if (itVoice->itKillEvent) {
556     dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));
557     }
558     }
559     }
560 schoenebeck 554 #endif // CONFIG_DEVMODE
561 schoenebeck 287 }
562     }
563 schoenebeck 460
564     // empty the engine channel's own event lists
565     pEngineChannel->ClearEventLists();
566 schoenebeck 412 }
567 schoenebeck 287
568 schoenebeck 53 /**
569 schoenebeck 244 * Will be called by the MIDI input device whenever a MIDI system
570     * exclusive message has arrived.
571     *
572     * @param pData - pointer to sysex data
573     * @param Size - lenght of sysex data (in bytes)
574     */
575     void Engine::SendSysex(void* pData, uint Size) {
576 schoenebeck 246 Event event = pEventGenerator->CreateEvent();
577     event.Type = Event::type_sysex;
578     event.Param.Sysex.Size = Size;
579 schoenebeck 412 event.pEngineChannel = NULL; // as Engine global event
580 schoenebeck 244 if (pEventQueue->write_space() > 0) {
581     if (pSysexBuffer->write_space() >= Size) {
582     // copy sysex data to input buffer
583     uint toWrite = Size;
584     uint8_t* pPos = (uint8_t*) pData;
585     while (toWrite) {
586     const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end());
587     pSysexBuffer->write(pPos, writeNow);
588     toWrite -= writeNow;
589     pPos += writeNow;
590    
591     }
592     // finally place sysex event into input event queue
593     pEventQueue->push(&event);
594     }
595 schoenebeck 554 else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,CONFIG_SYSEX_BUFFER_SIZE));
596 schoenebeck 244 }
597     else dmsg(1,("Engine: Input event queue full!"));
598     }
599    
600     /**
601 schoenebeck 53 * Assigns and triggers a new voice for the respective MIDI key.
602     *
603 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
604 schoenebeck 271 * @param itNoteOnEvent - key, velocity and time stamp of the event
605 schoenebeck 53 */
606 schoenebeck 411 void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
607 persson 438
608 schoenebeck 354 const int key = itNoteOnEvent->Param.Note.Key;
609    
610     // Change key dimension value if key is in keyswitching area
611 schoenebeck 411 {
612     const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;
613     if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
614     pEngineChannel->CurrentKeyDimension = ((key - pInstrument->DimensionKeyRange.low) * 128) /
615     (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
616     }
617 schoenebeck 354
618 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];
619 schoenebeck 354
620 schoenebeck 53 pKey->KeyPressed = true; // the MIDI key was now pressed down
621 persson 630 pKey->Velocity = itNoteOnEvent->Param.Note.Velocity;
622     pKey->NoteOnTime = FrameTime + itNoteOnEvent->FragmentPos(); // will be used to calculate note length
623 schoenebeck 53
624     // cancel release process of voices on this key if needed
625 schoenebeck 411 if (pKey->Active && !pEngineChannel->SustainPedal) {
626 schoenebeck 271 RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();
627     if (itCancelReleaseEvent) {
628     *itCancelReleaseEvent = *itNoteOnEvent; // copy event
629     itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type
630 schoenebeck 239 }
631     else dmsg(1,("Event pool emtpy!\n"));
632 schoenebeck 53 }
633    
634 schoenebeck 271 // move note on event to the key's own event list
635     RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);
636    
637 schoenebeck 460 // allocate and trigger new voice(s) for the key
638     {
639     // first, get total amount of required voices (dependant on amount of layers)
640     ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEventOnKeyList->Param.Note.Key);
641     if (pRegion) {
642     int voicesRequired = pRegion->Layers;
643     // now launch the required amount of voices
644     for (int i = 0; i < voicesRequired; i++)
645     LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, i, false, true);
646     }
647     }
648 persson 438
649 schoenebeck 473 // if neither a voice was spawned or postponed then remove note on event from key again
650     if (!pKey->Active && !pKey->VoiceTheftsQueued)
651     pKey->pEvents->free(itNoteOnEventOnKeyList);
652    
653 persson 438 pKey->RoundRobinIndex++;
654 schoenebeck 53 }
655    
656     /**
657     * Releases the voices on the given key if sustain pedal is not pressed.
658     * If sustain is pressed, the release of the note will be postponed until
659     * sustain pedal will be released or voice turned inactive by itself (e.g.
660     * due to completion of sample playback).
661     *
662 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
663 schoenebeck 271 * @param itNoteOffEvent - key, velocity and time stamp of the event
664 schoenebeck 53 */
665 schoenebeck 411 void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {
666     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
667 schoenebeck 53
668     pKey->KeyPressed = false; // the MIDI key was now released
669    
670     // release voices on this key if needed
671 schoenebeck 411 if (pKey->Active && !pEngineChannel->SustainPedal) {
672 schoenebeck 271 itNoteOffEvent->Type = Event::type_release; // transform event type
673 schoenebeck 242
674 persson 497 // move event to the key's own event list
675     RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);
676 schoenebeck 271
677 persson 497 // spawn release triggered voice(s) if needed
678 persson 630 if (pKey->ReleaseTrigger) {
679 persson 497 // first, get total amount of required voices (dependant on amount of layers)
680     ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOffEventOnKeyList->Param.Note.Key);
681     if (pRegion) {
682     int voicesRequired = pRegion->Layers;
683 persson 630
684     // MIDI note-on velocity is used instead of note-off velocity
685     itNoteOffEventOnKeyList->Param.Note.Velocity = pKey->Velocity;
686    
687 persson 497 // now launch the required amount of voices
688     for (int i = 0; i < voicesRequired; i++)
689     LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, i, true, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
690     }
691     pKey->ReleaseTrigger = false;
692 schoenebeck 460 }
693 persson 497
694     // if neither a voice was spawned or postponed then remove note off event from key again
695     if (!pKey->Active && !pKey->VoiceTheftsQueued)
696     pKey->pEvents->free(itNoteOffEventOnKeyList);
697 schoenebeck 242 }
698 schoenebeck 53 }
699    
700     /**
701     * Moves pitchbend event from the general (input) event list to the pitch
702     * event list.
703     *
704 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
705 schoenebeck 271 * @param itPitchbendEvent - absolute pitch value and time stamp of the event
706 schoenebeck 53 */
707 schoenebeck 411 void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) {
708     pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value
709 schoenebeck 460 itPitchbendEvent.moveToEndOf(pEngineChannel->pSynthesisEvents[Event::destination_vco]);
710 schoenebeck 53 }
711    
712     /**
713 schoenebeck 233 * Allocates and triggers a new voice. This method will usually be
714     * called by the ProcessNoteOn() method and by the voices itself
715     * (e.g. to spawn further voices on the same key for layered sounds).
716     *
717 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
718 schoenebeck 271 * @param itNoteOnEvent - key, velocity and time stamp of the event
719 schoenebeck 242 * @param iLayer - layer index for the new voice (optional - only
720     * in case of layered sounds of course)
721     * @param ReleaseTriggerVoice - if new voice is a release triggered voice
722     * (optional, default = false)
723 schoenebeck 250 * @param VoiceStealing - if voice stealing should be performed
724     * when there is no free voice
725     * (optional, default = true)
726     * @returns pointer to new voice or NULL if there was no free voice or
727 schoenebeck 354 * if the voice wasn't triggered (for example when no region is
728     * defined for the given key).
729 schoenebeck 233 */
730 schoenebeck 411 Pool<Voice>::Iterator Engine::LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing) {
731     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
732 schoenebeck 233
733     // allocate a new voice for the key
734 schoenebeck 271 Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
735     if (itNewVoice) {
736 schoenebeck 233 // launch the new voice
737 schoenebeck 411 if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pEngineChannel->pInstrument, iLayer, ReleaseTriggerVoice, VoiceStealing) < 0) {
738 schoenebeck 354 dmsg(4,("Voice not triggered\n"));
739 schoenebeck 271 pKey->pActiveVoices->free(itNewVoice);
740 schoenebeck 233 }
741 schoenebeck 239 else { // on success
742     uint** ppKeyGroup = NULL;
743 schoenebeck 271 if (itNewVoice->KeyGroup) { // if this voice / key belongs to a key group
744 schoenebeck 411 ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];
745 schoenebeck 239 if (*ppKeyGroup) { // if there's already an active key in that key group
746 schoenebeck 411 midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[**ppKeyGroup];
747 schoenebeck 239 // kill all voices on the (other) key
748 schoenebeck 271 RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
749     RTList<Voice>::Iterator end = pOtherKey->pActiveVoices->end();
750     for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
751     if (itVoiceToBeKilled->Type != Voice::type_release_trigger) itVoiceToBeKilled->Kill(itNoteOnEvent);
752 schoenebeck 242 }
753 schoenebeck 239 }
754     }
755     if (!pKey->Active) { // mark as active key
756     pKey->Active = true;
757 schoenebeck 411 pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();
758 schoenebeck 271 *pKey->itSelf = itNoteOnEvent->Param.Note.Key;
759 schoenebeck 239 }
760 schoenebeck 271 if (itNewVoice->KeyGroup) {
761     *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group
762 schoenebeck 239 }
763 schoenebeck 271 if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)
764     return itNewVoice; // success
765 schoenebeck 233 }
766     }
767 schoenebeck 285 else if (VoiceStealing) {
768 schoenebeck 460 // try to steal one voice
769 schoenebeck 473 int result = StealVoice(pEngineChannel, itNoteOnEvent);
770     if (!result) { // voice stolen successfully
771     // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died
772     RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();
773     if (itStealEvent) {
774     *itStealEvent = *itNoteOnEvent; // copy event
775     itStealEvent->Param.Note.Layer = iLayer;
776     itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;
777     pKey->VoiceTheftsQueued++;
778     }
779     else dmsg(1,("Voice stealing queue full!\n"));
780 schoenebeck 285 }
781     }
782    
783 schoenebeck 271 return Pool<Voice>::Iterator(); // no free voice or error
784 schoenebeck 233 }
785    
786     /**
787 schoenebeck 250 * Will be called by LaunchVoice() method in case there are no free
788     * voices left. This method will select and kill one old voice for
789     * voice stealing and postpone the note-on event until the selected
790     * voice actually died.
791     *
792 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
793 schoenebeck 285 * @param itNoteOnEvent - key, velocity and time stamp of the event
794 schoenebeck 473 * @returns 0 on success, a value < 0 if no active voice could be picked for voice stealing
795 schoenebeck 250 */
796 schoenebeck 473 int Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
797 schoenebeck 460 if (!VoiceTheftsLeft) {
798 schoenebeck 554 dmsg(1,("Max. voice thefts per audio fragment reached (you may raise CONFIG_MAX_VOICES).\n"));
799 schoenebeck 473 return -1;
800 schoenebeck 460 }
801 schoenebeck 271 if (!pEventPool->poolIsEmpty()) {
802 schoenebeck 250
803 schoenebeck 460 RTList<Voice>::Iterator itSelectedVoice;
804 schoenebeck 250
805     // Select one voice for voice stealing
806 schoenebeck 554 switch (CONFIG_VOICE_STEAL_ALGO) {
807 schoenebeck 250
808     // try to pick the oldest voice on the key where the new
809     // voice should be spawned, if there is no voice on that
810 schoenebeck 563 // key, or no voice left to kill, then procceed with
811 schoenebeck 250 // 'oldestkey' algorithm
812 schoenebeck 460 case voice_steal_algo_oldestvoiceonkey: {
813     midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
814 schoenebeck 563 itSelectedVoice = pSelectedKey->pActiveVoices->first();
815     // proceed iterating if voice was created in this fragment cycle
816     while (itSelectedVoice && !itSelectedVoice->hasRendered()) ++itSelectedVoice;
817     // if we haven't found a voice then proceed with algorithm 'oldestkey'
818     if (itSelectedVoice && itSelectedVoice->hasRendered()) break;
819 schoenebeck 250 } // no break - intentional !
820    
821     // try to pick the oldest voice on the oldest active key
822 schoenebeck 563 // from the same engine channel
823 schoenebeck 460 // (caution: must stay after 'oldestvoiceonkey' algorithm !)
824 schoenebeck 250 case voice_steal_algo_oldestkey: {
825 schoenebeck 649 // if we already stole in this fragment, try to proceed on same key
826 schoenebeck 460 if (this->itLastStolenVoice) {
827     itSelectedVoice = this->itLastStolenVoice;
828 schoenebeck 649 do {
829     ++itSelectedVoice;
830     } while (itSelectedVoice && !itSelectedVoice->hasRendered()); // proceed iterating if voice was created in this fragment cycle
831     // found a "stealable" voice ?
832     if (itSelectedVoice && itSelectedVoice->hasRendered()) {
833     // remember which voice we stole, so we can simply proceed on next voice stealing
834     this->itLastStolenVoice = itSelectedVoice;
835 schoenebeck 460 break; // selection succeeded
836 schoenebeck 250 }
837     }
838 schoenebeck 649 // get (next) oldest key
839     RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKey) ? ++this->iuiLastStolenKey : pEngineChannel->pActiveKeys->first();
840     while (iuiSelectedKey) {
841     midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];
842     itSelectedVoice = pSelectedKey->pActiveVoices->first();
843     // proceed iterating if voice was created in this fragment cycle
844     while (itSelectedVoice && !itSelectedVoice->hasRendered()) ++itSelectedVoice;
845     // found a "stealable" voice ?
846     if (itSelectedVoice && itSelectedVoice->hasRendered()) {
847     // remember which voice on which key we stole, so we can simply proceed on next voice stealing
848     this->iuiLastStolenKey = iuiSelectedKey;
849     this->itLastStolenVoice = itSelectedVoice;
850     break; // selection succeeded
851     }
852     ++iuiSelectedKey; // get next oldest key
853     }
854 schoenebeck 250 break;
855     }
856    
857     // don't steal anything
858     case voice_steal_algo_none:
859     default: {
860     dmsg(1,("No free voice (voice stealing disabled)!\n"));
861 schoenebeck 473 return -1;
862 schoenebeck 250 }
863     }
864    
865 schoenebeck 563 // if we couldn't steal a voice from the same engine channel then
866     // steal oldest voice on the oldest key from any other engine channel
867 schoenebeck 649 // (the smaller engine channel number, the higher priority)
868     if (!itSelectedVoice || !itSelectedVoice->hasRendered()) {
869     EngineChannel* pSelectedChannel;
870     int iChannelIndex;
871     // select engine channel
872     if (pLastStolenChannel) {
873     pSelectedChannel = pLastStolenChannel;
874     iChannelIndex = pSelectedChannel->iEngineIndexSelf;
875     } else { // pick the engine channel followed by this engine channel
876     iChannelIndex = (pEngineChannel->iEngineIndexSelf + 1) % engineChannels.size();
877     pSelectedChannel = engineChannels[iChannelIndex];
878     }
879     // iterate through engine channels
880 schoenebeck 460 while (true) {
881 schoenebeck 649 // if we already stole in this fragment, try to proceed on same key
882     if (this->itLastStolenVoiceGlobally) {
883     itSelectedVoice = this->itLastStolenVoiceGlobally;
884     do {
885     ++itSelectedVoice;
886     } while (itSelectedVoice && !itSelectedVoice->hasRendered()); // proceed iterating if voice was created in this fragment cycle
887     // break if selection succeeded
888     if (itSelectedVoice && itSelectedVoice->hasRendered()) {
889     // remember which voice we stole, so we can simply proceed on next voice stealing
890     this->itLastStolenVoiceGlobally = itSelectedVoice;
891     break; // selection succeeded
892     }
893 schoenebeck 460 }
894 schoenebeck 649 // get (next) oldest key
895     RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKey) ? ++this->iuiLastStolenKey : pSelectedChannel->pActiveKeys->first();
896     while (iuiSelectedKey) {
897     midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];
898     itSelectedVoice = pSelectedKey->pActiveVoices->first();
899     // proceed iterating if voice was created in this fragment cycle
900     while (itSelectedVoice && !itSelectedVoice->hasRendered()) ++itSelectedVoice;
901     // found a "stealable" voice ?
902     if (itSelectedVoice && itSelectedVoice->hasRendered()) {
903     // remember which voice on which key on which engine channel we stole, so we can simply proceed on next voice stealing
904     this->iuiLastStolenKeyGlobally = iuiSelectedKey;
905     this->itLastStolenVoiceGlobally = itSelectedVoice;
906     this->pLastStolenChannel = pSelectedChannel;
907     break; // selection succeeded
908     }
909     ++iuiSelectedKey; // get next key on current engine channel
910     }
911     // get next engine channel
912 schoenebeck 460 iChannelIndex = (iChannelIndex + 1) % engineChannels.size();
913 schoenebeck 649 pSelectedChannel = engineChannels[iChannelIndex];
914 schoenebeck 460 }
915     }
916    
917 schoenebeck 563 #if CONFIG_DEVMODE
918 schoenebeck 473 if (!itSelectedVoice->IsActive()) {
919     dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));
920     return -1;
921     }
922 schoenebeck 563 #endif // CONFIG_DEVMODE
923 schoenebeck 287
924 schoenebeck 250 // now kill the selected voice
925 schoenebeck 649 itSelectedVoice->Kill(itNoteOnEvent);
926 schoenebeck 460
927     --VoiceTheftsLeft;
928 schoenebeck 473
929     return 0; // success
930 schoenebeck 250 }
931 schoenebeck 473 else {
932     dmsg(1,("Event pool emtpy!\n"));
933     return -1;
934     }
935 schoenebeck 250 }
936    
937     /**
938 schoenebeck 285 * Removes the given voice from the MIDI key's list of active voices.
939     * This method will be called when a voice went inactive, e.g. because
940     * it finished to playback its sample, finished its release stage or
941     * just was killed.
942 schoenebeck 53 *
943 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
944 schoenebeck 285 * @param itVoice - points to the voice to be freed
945 schoenebeck 53 */
946 schoenebeck 411 void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) {
947 schoenebeck 271 if (itVoice) {
948 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoice->MIDIKey];
949 schoenebeck 53
950 schoenebeck 271 uint keygroup = itVoice->KeyGroup;
951    
952 schoenebeck 53 // free the voice object
953 schoenebeck 271 pVoicePool->free(itVoice);
954 schoenebeck 53
955 schoenebeck 287 // if no other voices left and member of a key group, remove from key group
956     if (pKey->pActiveVoices->isEmpty() && keygroup) {
957 schoenebeck 411 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[keygroup];
958 schoenebeck 287 if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group
959 schoenebeck 53 }
960     }
961 schoenebeck 285 else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;
962 schoenebeck 53 }
963    
964     /**
965 schoenebeck 287 * Called when there's no more voice left on a key, this call will
966     * update the key info respectively.
967     *
968 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
969 schoenebeck 287 * @param pKey - key which is now inactive
970     */
971 schoenebeck 411 void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) {
972 schoenebeck 287 if (pKey->pActiveVoices->isEmpty()) {
973     pKey->Active = false;
974 schoenebeck 411 pEngineChannel->pActiveKeys->free(pKey->itSelf); // remove key from list of active keys
975 schoenebeck 287 pKey->itSelf = RTList<uint>::Iterator();
976     pKey->ReleaseTrigger = false;
977     pKey->pEvents->clear();
978     dmsg(3,("Key has no more voices now\n"));
979     }
980     else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n"));
981     }
982    
983     /**
984 schoenebeck 53 * Reacts on supported control change commands (e.g. pitch bend wheel,
985     * modulation wheel, aftertouch).
986     *
987 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
988 schoenebeck 271 * @param itControlChangeEvent - controller, value and time stamp of the event
989 schoenebeck 53 */
990 schoenebeck 411 void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) {
991 schoenebeck 271 dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
992 schoenebeck 53
993 schoenebeck 473 // update controller value in the engine channel's controller table
994     pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
995    
996     // move event from the unsorted event list to the control change event list
997     Pool<Event>::Iterator itControlChangeEventOnCCList = itControlChangeEvent.moveToEndOf(pEngineChannel->pCCEvents);
998    
999     switch (itControlChangeEventOnCCList->Param.CC.Controller) {
1000 schoenebeck 424 case 7: { // volume
1001     //TODO: not sample accurate yet
1002 schoenebeck 473 pEngineChannel->GlobalVolume = (float) itControlChangeEventOnCCList->Param.CC.Value / 127.0f;
1003 schoenebeck 424 break;
1004     }
1005     case 10: { // panpot
1006     //TODO: not sample accurate yet
1007 schoenebeck 473 const int pan = (int) itControlChangeEventOnCCList->Param.CC.Value - 64;
1008 schoenebeck 424 pEngineChannel->GlobalPanLeft = 1.0f - float(RTMath::Max(pan, 0)) / 63.0f;
1009     pEngineChannel->GlobalPanRight = 1.0f - float(RTMath::Min(pan, 0)) / -64.0f;
1010     break;
1011     }
1012     case 64: { // sustain
1013 schoenebeck 473 if (itControlChangeEventOnCCList->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {
1014 schoenebeck 53 dmsg(4,("PEDAL DOWN\n"));
1015 schoenebeck 411 pEngineChannel->SustainPedal = true;
1016 schoenebeck 53
1017     // cancel release process of voices if necessary
1018 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1019 schoenebeck 473 for (; iuiKey; ++iuiKey) {
1020     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1021     if (!pKey->KeyPressed) {
1022     RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1023     if (itNewEvent) {
1024     *itNewEvent = *itControlChangeEventOnCCList; // copy event to the key's own event list
1025     itNewEvent->Type = Event::type_cancel_release; // transform event type
1026 schoenebeck 53 }
1027 schoenebeck 473 else dmsg(1,("Event pool emtpy!\n"));
1028 schoenebeck 53 }
1029     }
1030     }
1031 schoenebeck 473 if (itControlChangeEventOnCCList->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {
1032 schoenebeck 53 dmsg(4,("PEDAL UP\n"));
1033 schoenebeck 411 pEngineChannel->SustainPedal = false;
1034 schoenebeck 53
1035     // release voices if their respective key is not pressed
1036 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1037 schoenebeck 473 for (; iuiKey; ++iuiKey) {
1038     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1039     if (!pKey->KeyPressed) {
1040     RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1041     if (itNewEvent) {
1042     *itNewEvent = *itControlChangeEventOnCCList; // copy event to the key's own event list
1043     itNewEvent->Type = Event::type_release; // transform event type
1044 schoenebeck 53 }
1045 schoenebeck 473 else dmsg(1,("Event pool emtpy!\n"));
1046 schoenebeck 53 }
1047     }
1048     }
1049     break;
1050     }
1051    
1052    
1053 schoenebeck 473 // Channel Mode Messages
1054    
1055     case 120: { // all sound off
1056     KillAllVoices(pEngineChannel, itControlChangeEventOnCCList);
1057     break;
1058     }
1059     case 121: { // reset all controllers
1060     pEngineChannel->ResetControllers();
1061     break;
1062     }
1063     case 123: { // all notes off
1064     ReleaseAllVoices(pEngineChannel, itControlChangeEventOnCCList);
1065     break;
1066     }
1067     }
1068 schoenebeck 53 }
1069    
1070     /**
1071 schoenebeck 244 * Reacts on MIDI system exclusive messages.
1072     *
1073 schoenebeck 271 * @param itSysexEvent - sysex data size and time stamp of the sysex event
1074 schoenebeck 244 */
1075 schoenebeck 271 void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {
1076 schoenebeck 244 RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader();
1077    
1078     uint8_t exclusive_status, id;
1079     if (!reader.pop(&exclusive_status)) goto free_sysex_data;
1080     if (!reader.pop(&id)) goto free_sysex_data;
1081     if (exclusive_status != 0xF0) goto free_sysex_data;
1082    
1083     switch (id) {
1084     case 0x41: { // Roland
1085 schoenebeck 493 dmsg(3,("Roland Sysex\n"));
1086 schoenebeck 244 uint8_t device_id, model_id, cmd_id;
1087     if (!reader.pop(&device_id)) goto free_sysex_data;
1088     if (!reader.pop(&model_id)) goto free_sysex_data;
1089     if (!reader.pop(&cmd_id)) goto free_sysex_data;
1090     if (model_id != 0x42 /*GS*/) goto free_sysex_data;
1091     if (cmd_id != 0x12 /*DT1*/) goto free_sysex_data;
1092    
1093     // command address
1094     uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB)
1095     const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later
1096     if (reader.read(&addr[0], 3) != 3) goto free_sysex_data;
1097     if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters
1098 schoenebeck 493 dmsg(3,("\tSystem Parameter\n"));
1099 schoenebeck 244 }
1100     else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters
1101 schoenebeck 493 dmsg(3,("\tCommon Parameter\n"));
1102 schoenebeck 244 }
1103     else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)
1104 schoenebeck 493 dmsg(3,("\tPart Parameter\n"));
1105     switch (addr[2]) {
1106 schoenebeck 244 case 0x40: { // scale tuning
1107 schoenebeck 493 dmsg(3,("\t\tScale Tuning\n"));
1108 schoenebeck 244 uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave
1109     if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data;
1110     uint8_t checksum;
1111 schoenebeck 493 if (!reader.pop(&checksum)) goto free_sysex_data;
1112 schoenebeck 563 #if CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1113     if (GSCheckSum(checksum_reader, 12)) goto free_sysex_data;
1114     #endif // CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1115 schoenebeck 244 for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;
1116     AdjustScale((int8_t*) scale_tunes);
1117 schoenebeck 493 dmsg(3,("\t\t\tNew scale applied.\n"));
1118 schoenebeck 244 break;
1119     }
1120     }
1121     }
1122     else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)
1123     }
1124     else if (addr[0] == 0x41) { // Drum Setup Parameters
1125     }
1126     break;
1127     }
1128     }
1129    
1130     free_sysex_data: // finally free sysex data
1131 schoenebeck 271 pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);
1132 schoenebeck 244 }
1133    
1134     /**
1135     * Calculates the Roland GS sysex check sum.
1136     *
1137     * @param AddrReader - reader which currently points to the first GS
1138     * command address byte of the GS sysex message in
1139     * question
1140     * @param DataSize - size of the GS message data (in bytes)
1141     */
1142     uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) {
1143     RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader;
1144     uint bytes = 3 /*addr*/ + DataSize;
1145     uint8_t addr_and_data[bytes];
1146     reader.read(&addr_and_data[0], bytes);
1147     uint8_t sum = 0;
1148     for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];
1149     return 128 - sum % 128;
1150     }
1151    
1152     /**
1153     * Allows to tune each of the twelve semitones of an octave.
1154     *
1155     * @param ScaleTunes - detuning of all twelve semitones (in cents)
1156     */
1157     void Engine::AdjustScale(int8_t ScaleTunes[12]) {
1158     memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate
1159     }
1160    
1161     /**
1162 schoenebeck 473 * Releases all voices on an engine channel. All voices will go into
1163     * the release stage and thus it might take some time (e.g. dependant to
1164     * their envelope release time) until they actually die.
1165     *
1166     * @param pEngineChannel - engine channel on which all voices should be released
1167     * @param itReleaseEvent - event which caused this releasing of all voices
1168     */
1169     void Engine::ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent) {
1170     RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1171     while (iuiKey) {
1172     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1173     ++iuiKey;
1174     // append a 'release' event to the key's own event list
1175     RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1176     if (itNewEvent) {
1177     *itNewEvent = *itReleaseEvent; // copy original event (to the key's event list)
1178     itNewEvent->Type = Event::type_release; // transform event type
1179     }
1180     else dmsg(1,("Event pool emtpy!\n"));
1181     }
1182     }
1183    
1184     /**
1185     * Kills all voices on an engine channel as soon as possible. Voices
1186     * won't get into release state, their volume level will be ramped down
1187     * as fast as possible.
1188     *
1189     * @param pEngineChannel - engine channel on which all voices should be killed
1190     * @param itKillEvent - event which caused this killing of all voices
1191     */
1192     void Engine::KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent) {
1193     RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1194     RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
1195     while (iuiKey != end) { // iterate through all active keys
1196     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1197     ++iuiKey;
1198     RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
1199     RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
1200     for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
1201     itVoice->Kill(itKillEvent);
1202     }
1203     }
1204     }
1205    
1206     /**
1207 schoenebeck 53 * Initialize the parameter sequence for the modulation destination given by
1208     * by 'dst' with the constant value given by val.
1209     */
1210     void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) {
1211     int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle();
1212 schoenebeck 80 float* m = &pSynthesisParameters[dst][0];
1213     for (int i = 0; i < maxsamples; i += 4) {
1214     m[i] = val;
1215     m[i+1] = val;
1216     m[i+2] = val;
1217     m[i+3] = val;
1218     }
1219 persson 438 }
1220 schoenebeck 53
1221     uint Engine::VoiceCount() {
1222     return ActiveVoiceCount;
1223     }
1224    
1225     uint Engine::VoiceCountMax() {
1226     return ActiveVoiceCountMax;
1227     }
1228    
1229     bool Engine::DiskStreamSupported() {
1230     return true;
1231     }
1232    
1233     uint Engine::DiskStreamCount() {
1234     return (pDiskThread) ? pDiskThread->ActiveStreamCount : 0;
1235     }
1236    
1237     uint Engine::DiskStreamCountMax() {
1238     return (pDiskThread) ? pDiskThread->ActiveStreamCountMax : 0;
1239     }
1240    
1241     String Engine::DiskStreamBufferFillBytes() {
1242     return pDiskThread->GetBufferFillBytes();
1243     }
1244    
1245     String Engine::DiskStreamBufferFillPercentage() {
1246     return pDiskThread->GetBufferFillPercentage();
1247     }
1248    
1249 senkov 112 String Engine::EngineName() {
1250 schoenebeck 475 return LS_GIG_ENGINE_NAME;
1251 senkov 112 }
1252    
1253 schoenebeck 53 String Engine::Description() {
1254     return "Gigasampler Engine";
1255     }
1256    
1257     String Engine::Version() {
1258 schoenebeck 649 String s = "$Revision: 1.41 $";
1259 schoenebeck 123 return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
1260 schoenebeck 53 }
1261    
1262     }} // namespace LinuxSampler::gig

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