/[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 659 - (hide annotations) (download)
Thu Jun 16 21:35:30 2005 UTC (15 years ago) by schoenebeck
File size: 59523 byte(s)
* don't reset scale tuning on instrument or audio output device change

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 285 if (MaxFadeOutPos < 0)
244 schoenebeck 554 throw LinuxSamplerException("CONFIG_EG_MIN_RELEASE_TIME too big for current audio fragment size / sampling rate!");
245 schoenebeck 285
246 schoenebeck 53 // (re)create disk thread
247     if (this->pDiskThread) {
248 senkov 329 dmsg(1,("Stopping disk thread..."));
249 schoenebeck 53 this->pDiskThread->StopThread();
250     delete this->pDiskThread;
251 senkov 329 dmsg(1,("OK\n"));
252 schoenebeck 53 }
253 schoenebeck 554 this->pDiskThread = new DiskThread(((pAudioOut->MaxSamplesPerCycle() << CONFIG_MAX_PITCH) << 1) + 6); //FIXME: assuming stereo
254 schoenebeck 53 if (!pDiskThread) {
255     dmsg(0,("gig::Engine new diskthread = NULL\n"));
256     exit(EXIT_FAILURE);
257     }
258    
259 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
260     iterVoice->pDiskThread = this->pDiskThread;
261 schoenebeck 53 dmsg(3,("d"));
262     }
263     pVoicePool->clear();
264    
265     // (re)create event generator
266     if (pEventGenerator) delete pEventGenerator;
267     pEventGenerator = new EventGenerator(pAudioOut->SampleRate());
268    
269     // (re)allocate synthesis parameter matrix
270 schoenebeck 319 if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
271 schoenebeck 361
272     #if defined(__APPLE__)
273     pSynthesisParameters[0] = (float *) malloc(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle());
274     #else
275 schoenebeck 319 pSynthesisParameters[0] = (float *) memalign(16,(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle()));
276 schoenebeck 361 #endif
277 schoenebeck 53 for (int dst = 1; dst < Event::destination_count; dst++)
278     pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();
279    
280 schoenebeck 80 // (re)allocate biquad filter parameter sequence
281     if (pBasicFilterParameters) delete[] pBasicFilterParameters;
282     if (pMainFilterParameters) delete[] pMainFilterParameters;
283     pBasicFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];
284     pMainFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];
285    
286 schoenebeck 53 dmsg(1,("Starting disk thread..."));
287     pDiskThread->StartThread();
288     dmsg(1,("OK\n"));
289    
290 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
291     if (!iterVoice->pDiskThread) {
292 schoenebeck 53 dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));
293     exit(EXIT_FAILURE);
294     }
295     }
296     }
297    
298 schoenebeck 473 /**
299     * Clear all engine global event lists.
300     */
301 schoenebeck 412 void Engine::ClearEventLists() {
302 schoenebeck 460 pGlobalEvents->clear();
303 schoenebeck 412 }
304    
305 schoenebeck 53 /**
306 schoenebeck 460 * Copy all events from the engine's global input queue buffer to the
307     * engine's internal event list. This will be done at the beginning of
308     * each audio cycle (that is each RenderAudio() call) to distinguish
309     * all global events which have to be processed in the current audio
310     * cycle. These events are usually just SysEx messages. Every
311     * EngineChannel has it's own input event queue buffer and event list
312     * to handle common events like NoteOn, NoteOff and ControlChange
313     * events.
314 schoenebeck 412 *
315 schoenebeck 460 * @param Samples - number of sample points to be processed in the
316     * current audio cycle
317 schoenebeck 412 */
318 schoenebeck 460 void Engine::ImportEvents(uint Samples) {
319 schoenebeck 412 RingBuffer<Event>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader();
320     Event* pEvent;
321     while (true) {
322     // get next event from input event queue
323     if (!(pEvent = eventQueueReader.pop())) break;
324     // if younger event reached, ignore that and all subsequent ones for now
325     if (pEvent->FragmentPos() >= Samples) {
326     eventQueueReader--;
327     dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples));
328     pEvent->ResetFragmentPos();
329     break;
330     }
331     // copy event to internal event list
332 schoenebeck 460 if (pGlobalEvents->poolIsEmpty()) {
333 schoenebeck 412 dmsg(1,("Event pool emtpy!\n"));
334     break;
335     }
336 schoenebeck 460 *pGlobalEvents->allocAppend() = *pEvent;
337 schoenebeck 412 }
338     eventQueueReader.free(); // free all copied events from input queue
339 persson 438 }
340 schoenebeck 412
341     /**
342 schoenebeck 53 * Let this engine proceed to render the given amount of sample points. The
343     * calculated audio data of all voices of this engine will be placed into
344     * the engine's audio sum buffer which has to be copied and eventually be
345     * converted to the appropriate value range by the audio output class (e.g.
346     * AlsaIO or JackIO) right after.
347     *
348     * @param Samples - number of sample points to be rendered
349     * @returns 0 on success
350     */
351 schoenebeck 412 int Engine::RenderAudio(uint Samples) {
352 schoenebeck 53 dmsg(5,("RenderAudio(Samples=%d)\n", Samples));
353    
354 schoenebeck 412 // return if engine disabled
355 schoenebeck 53 if (EngineDisabled.Pop()) {
356     dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));
357     return 0;
358     }
359    
360 schoenebeck 293 // update time of start and end of this audio fragment (as events' time stamps relate to this)
361     pEventGenerator->UpdateFragmentTime(Samples);
362    
363 schoenebeck 412 // get all events from the engine's global input event queue which belong to the current fragment
364     // (these are usually just SysEx messages)
365 schoenebeck 460 ImportEvents(Samples);
366 schoenebeck 412
367     // process engine global events (these are currently only MIDI System Exclusive messages)
368     {
369 schoenebeck 460 RTList<Event>::Iterator itEvent = pGlobalEvents->first();
370     RTList<Event>::Iterator end = pGlobalEvents->end();
371 schoenebeck 412 for (; itEvent != end; ++itEvent) {
372     switch (itEvent->Type) {
373     case Event::type_sysex:
374     dmsg(5,("Engine: Sysex received\n"));
375     ProcessSysex(itEvent);
376     break;
377     }
378     }
379 schoenebeck 53 }
380 schoenebeck 412
381 schoenebeck 554 // We only allow a maximum of CONFIG_MAX_VOICES voices to be stolen
382 schoenebeck 460 // in each audio fragment. All subsequent request for spawning new
383     // voices in the same audio fragment will be ignored.
384 schoenebeck 554 VoiceTheftsLeft = CONFIG_MAX_VOICES;
385 schoenebeck 460
386 schoenebeck 412 // reset internal voice counter (just for statistic of active voices)
387     ActiveVoiceCountTemp = 0;
388    
389 schoenebeck 460
390 schoenebeck 466 // handle events on all engine channels
391 schoenebeck 460 for (int i = 0; i < engineChannels.size(); i++) {
392     if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
393     ProcessEvents(engineChannels[i], Samples);
394 schoenebeck 466 }
395    
396     // render all 'normal', active voices on all engine channels
397     for (int i = 0; i < engineChannels.size(); i++) {
398     if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
399 schoenebeck 460 RenderActiveVoices(engineChannels[i], Samples);
400 schoenebeck 412 }
401    
402 schoenebeck 460 // now that all ordinary voices on ALL engine channels are rendered, render new stolen voices
403     RenderStolenVoices(Samples);
404    
405     // handle cleanup on all engine channels for the next audio fragment
406     for (int i = 0; i < engineChannels.size(); i++) {
407     if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
408     PostProcess(engineChannels[i]);
409     }
410    
411    
412     // empty the engine's event list for the next audio fragment
413     ClearEventLists();
414    
415     // reset voice stealing for the next audio fragment
416     pVoiceStealingQueue->clear();
417    
418 schoenebeck 412 // just some statistics about this engine instance
419     ActiveVoiceCount = ActiveVoiceCountTemp;
420     if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;
421    
422 persson 630 FrameTime += Samples;
423    
424 schoenebeck 412 return 0;
425     }
426    
427 schoenebeck 473 /**
428     * Dispatch and handle all events in this audio fragment for the given
429     * engine channel.
430     *
431     * @param pEngineChannel - engine channel on which events should be
432     * processed
433     * @param Samples - amount of sample points to be processed in
434     * this audio fragment cycle
435     */
436 schoenebeck 460 void Engine::ProcessEvents(EngineChannel* pEngineChannel, uint Samples) {
437 schoenebeck 412 // get all events from the engine channels's input event queue which belong to the current fragment
438     // (these are the common events like NoteOn, NoteOff, ControlChange, etc.)
439 schoenebeck 460 pEngineChannel->ImportEvents(Samples);
440 schoenebeck 53
441     // process events
442 schoenebeck 271 {
443 schoenebeck 460 RTList<Event>::Iterator itEvent = pEngineChannel->pEvents->first();
444     RTList<Event>::Iterator end = pEngineChannel->pEvents->end();
445 schoenebeck 271 for (; itEvent != end; ++itEvent) {
446     switch (itEvent->Type) {
447     case Event::type_note_on:
448     dmsg(5,("Engine: Note on received\n"));
449 schoenebeck 412 ProcessNoteOn((EngineChannel*)itEvent->pEngineChannel, itEvent);
450 schoenebeck 271 break;
451     case Event::type_note_off:
452     dmsg(5,("Engine: Note off received\n"));
453 schoenebeck 412 ProcessNoteOff((EngineChannel*)itEvent->pEngineChannel, itEvent);
454 schoenebeck 271 break;
455     case Event::type_control_change:
456     dmsg(5,("Engine: MIDI CC received\n"));
457 schoenebeck 412 ProcessControlChange((EngineChannel*)itEvent->pEngineChannel, itEvent);
458 schoenebeck 271 break;
459     case Event::type_pitchbend:
460     dmsg(5,("Engine: Pitchbend received\n"));
461 schoenebeck 412 ProcessPitchbend((EngineChannel*)itEvent->pEngineChannel, itEvent);
462 schoenebeck 271 break;
463     }
464 schoenebeck 53 }
465     }
466 schoenebeck 649
467     // reset voice stealing for the next engine channel (or next audio fragment)
468     itLastStolenVoice = RTList<Voice>::Iterator();
469     itLastStolenVoiceGlobally = RTList<Voice>::Iterator();
470     iuiLastStolenKey = RTList<uint>::Iterator();
471     iuiLastStolenKeyGlobally = RTList<uint>::Iterator();
472     pLastStolenChannel = NULL;
473 schoenebeck 460 }
474 schoenebeck 53
475 schoenebeck 473 /**
476     * Render all 'normal' voices (that is voices which were not stolen in
477     * this fragment) on the given engine channel.
478     *
479     * @param pEngineChannel - engine channel on which audio should be
480     * rendered
481     * @param Samples - amount of sample points to be rendered in
482     * this audio fragment cycle
483     */
484 schoenebeck 460 void Engine::RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples) {
485     RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
486     RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
487     while (iuiKey != end) { // iterate through all active keys
488     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
489     ++iuiKey;
490 schoenebeck 53
491 schoenebeck 460 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
492     RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
493     for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
494     // now render current voice
495     itVoice->Render(Samples);
496     if (itVoice->IsActive()) ActiveVoiceCountTemp++; // still active
497     else { // voice reached end, is now inactive
498     FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices
499 schoenebeck 53 }
500     }
501     }
502 schoenebeck 460 }
503 schoenebeck 53
504 schoenebeck 473 /**
505     * Render all stolen voices (only voices which were stolen in this
506     * fragment) on the given engine channel. Stolen voices are rendered
507     * after all normal voices have been rendered; this is needed to render
508     * audio of those voices which were selected for voice stealing until
509     * the point were the stealing (that is the take over of the voice)
510     * actually happened.
511     *
512     * @param pEngineChannel - engine channel on which audio should be
513     * rendered
514     * @param Samples - amount of sample points to be rendered in
515     * this audio fragment cycle
516     */
517 schoenebeck 460 void Engine::RenderStolenVoices(uint Samples) {
518     RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();
519     RTList<Event>::Iterator end = pVoiceStealingQueue->end();
520     for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {
521     EngineChannel* pEngineChannel = (EngineChannel*) itVoiceStealEvent->pEngineChannel;
522     Pool<Voice>::Iterator itNewVoice =
523     LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false);
524     if (itNewVoice) {
525     itNewVoice->Render(Samples);
526     if (itNewVoice->IsActive()) ActiveVoiceCountTemp++; // still active
527     else { // voice reached end, is now inactive
528     FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices
529 schoenebeck 250 }
530     }
531 schoenebeck 460 else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));
532 schoenebeck 473
533     // we need to clear the key's event list explicitly here in case key was never active
534     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoiceStealEvent->Param.Note.Key];
535     pKey->VoiceTheftsQueued--;
536     if (!pKey->Active && !pKey->VoiceTheftsQueued) pKey->pEvents->clear();
537 schoenebeck 250 }
538 schoenebeck 460 }
539 schoenebeck 250
540 schoenebeck 473 /**
541     * Free all keys which have turned inactive in this audio fragment, from
542     * the list of active keys and clear all event lists on that engine
543     * channel.
544     *
545     * @param pEngineChannel - engine channel to cleanup
546     */
547 schoenebeck 460 void Engine::PostProcess(EngineChannel* pEngineChannel) {
548 schoenebeck 287 // free all keys which have no active voices left
549     {
550 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
551     RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
552 schoenebeck 287 while (iuiKey != end) { // iterate through all active keys
553 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
554 schoenebeck 287 ++iuiKey;
555 schoenebeck 411 if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);
556 schoenebeck 554 #if CONFIG_DEVMODE
557 schoenebeck 563 else { // just a sanity check for debugging
558 schoenebeck 287 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
559     RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
560     for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
561     if (itVoice->itKillEvent) {
562     dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));
563     }
564     }
565     }
566 schoenebeck 554 #endif // CONFIG_DEVMODE
567 schoenebeck 287 }
568     }
569 schoenebeck 460
570     // empty the engine channel's own event lists
571     pEngineChannel->ClearEventLists();
572 schoenebeck 412 }
573 schoenebeck 287
574 schoenebeck 53 /**
575 schoenebeck 244 * Will be called by the MIDI input device whenever a MIDI system
576     * exclusive message has arrived.
577     *
578     * @param pData - pointer to sysex data
579     * @param Size - lenght of sysex data (in bytes)
580     */
581     void Engine::SendSysex(void* pData, uint Size) {
582 schoenebeck 246 Event event = pEventGenerator->CreateEvent();
583     event.Type = Event::type_sysex;
584     event.Param.Sysex.Size = Size;
585 schoenebeck 412 event.pEngineChannel = NULL; // as Engine global event
586 schoenebeck 244 if (pEventQueue->write_space() > 0) {
587     if (pSysexBuffer->write_space() >= Size) {
588     // copy sysex data to input buffer
589     uint toWrite = Size;
590     uint8_t* pPos = (uint8_t*) pData;
591     while (toWrite) {
592     const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end());
593     pSysexBuffer->write(pPos, writeNow);
594     toWrite -= writeNow;
595     pPos += writeNow;
596    
597     }
598     // finally place sysex event into input event queue
599     pEventQueue->push(&event);
600     }
601 schoenebeck 554 else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,CONFIG_SYSEX_BUFFER_SIZE));
602 schoenebeck 244 }
603     else dmsg(1,("Engine: Input event queue full!"));
604     }
605    
606     /**
607 schoenebeck 53 * Assigns and triggers a new voice for the respective MIDI key.
608     *
609 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
610 schoenebeck 271 * @param itNoteOnEvent - key, velocity and time stamp of the event
611 schoenebeck 53 */
612 schoenebeck 411 void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
613 persson 438
614 schoenebeck 354 const int key = itNoteOnEvent->Param.Note.Key;
615    
616     // Change key dimension value if key is in keyswitching area
617 schoenebeck 411 {
618     const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;
619     if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
620     pEngineChannel->CurrentKeyDimension = ((key - pInstrument->DimensionKeyRange.low) * 128) /
621     (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
622     }
623 schoenebeck 354
624 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];
625 schoenebeck 354
626 schoenebeck 53 pKey->KeyPressed = true; // the MIDI key was now pressed down
627 persson 630 pKey->Velocity = itNoteOnEvent->Param.Note.Velocity;
628     pKey->NoteOnTime = FrameTime + itNoteOnEvent->FragmentPos(); // will be used to calculate note length
629 schoenebeck 53
630     // cancel release process of voices on this key if needed
631 schoenebeck 411 if (pKey->Active && !pEngineChannel->SustainPedal) {
632 schoenebeck 271 RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();
633     if (itCancelReleaseEvent) {
634     *itCancelReleaseEvent = *itNoteOnEvent; // copy event
635     itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type
636 schoenebeck 239 }
637     else dmsg(1,("Event pool emtpy!\n"));
638 schoenebeck 53 }
639    
640 schoenebeck 271 // move note on event to the key's own event list
641     RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);
642    
643 schoenebeck 460 // allocate and trigger new voice(s) for the key
644     {
645     // first, get total amount of required voices (dependant on amount of layers)
646     ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEventOnKeyList->Param.Note.Key);
647     if (pRegion) {
648     int voicesRequired = pRegion->Layers;
649     // now launch the required amount of voices
650     for (int i = 0; i < voicesRequired; i++)
651     LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, i, false, true);
652     }
653     }
654 persson 438
655 schoenebeck 473 // if neither a voice was spawned or postponed then remove note on event from key again
656     if (!pKey->Active && !pKey->VoiceTheftsQueued)
657     pKey->pEvents->free(itNoteOnEventOnKeyList);
658    
659 persson 438 pKey->RoundRobinIndex++;
660 schoenebeck 53 }
661    
662     /**
663     * Releases the voices on the given key if sustain pedal is not pressed.
664     * If sustain is pressed, the release of the note will be postponed until
665     * sustain pedal will be released or voice turned inactive by itself (e.g.
666     * due to completion of sample playback).
667     *
668 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
669 schoenebeck 271 * @param itNoteOffEvent - key, velocity and time stamp of the event
670 schoenebeck 53 */
671 schoenebeck 411 void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {
672     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
673 schoenebeck 53
674     pKey->KeyPressed = false; // the MIDI key was now released
675    
676     // release voices on this key if needed
677 schoenebeck 411 if (pKey->Active && !pEngineChannel->SustainPedal) {
678 schoenebeck 271 itNoteOffEvent->Type = Event::type_release; // transform event type
679 schoenebeck 242
680 persson 497 // move event to the key's own event list
681     RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);
682 schoenebeck 271
683 persson 497 // spawn release triggered voice(s) if needed
684 persson 630 if (pKey->ReleaseTrigger) {
685 persson 497 // first, get total amount of required voices (dependant on amount of layers)
686     ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOffEventOnKeyList->Param.Note.Key);
687     if (pRegion) {
688     int voicesRequired = pRegion->Layers;
689 persson 630
690     // MIDI note-on velocity is used instead of note-off velocity
691     itNoteOffEventOnKeyList->Param.Note.Velocity = pKey->Velocity;
692    
693 persson 497 // now launch the required amount of voices
694     for (int i = 0; i < voicesRequired; i++)
695     LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, i, true, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
696     }
697     pKey->ReleaseTrigger = false;
698 schoenebeck 460 }
699 persson 497
700     // if neither a voice was spawned or postponed then remove note off event from key again
701     if (!pKey->Active && !pKey->VoiceTheftsQueued)
702     pKey->pEvents->free(itNoteOffEventOnKeyList);
703 schoenebeck 242 }
704 schoenebeck 53 }
705    
706     /**
707     * Moves pitchbend event from the general (input) event list to the pitch
708     * event list.
709     *
710 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
711 schoenebeck 271 * @param itPitchbendEvent - absolute pitch value and time stamp of the event
712 schoenebeck 53 */
713 schoenebeck 411 void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) {
714     pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value
715 schoenebeck 460 itPitchbendEvent.moveToEndOf(pEngineChannel->pSynthesisEvents[Event::destination_vco]);
716 schoenebeck 53 }
717    
718     /**
719 schoenebeck 233 * Allocates and triggers a new voice. This method will usually be
720     * called by the ProcessNoteOn() method and by the voices itself
721     * (e.g. to spawn further voices on the same key for layered sounds).
722     *
723 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
724 schoenebeck 271 * @param itNoteOnEvent - key, velocity and time stamp of the event
725 schoenebeck 242 * @param iLayer - layer index for the new voice (optional - only
726     * in case of layered sounds of course)
727     * @param ReleaseTriggerVoice - if new voice is a release triggered voice
728     * (optional, default = false)
729 schoenebeck 250 * @param VoiceStealing - if voice stealing should be performed
730     * when there is no free voice
731     * (optional, default = true)
732     * @returns pointer to new voice or NULL if there was no free voice or
733 schoenebeck 354 * if the voice wasn't triggered (for example when no region is
734     * defined for the given key).
735 schoenebeck 233 */
736 schoenebeck 411 Pool<Voice>::Iterator Engine::LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing) {
737     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
738 schoenebeck 233
739     // allocate a new voice for the key
740 schoenebeck 271 Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
741     if (itNewVoice) {
742 schoenebeck 233 // launch the new voice
743 schoenebeck 411 if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pEngineChannel->pInstrument, iLayer, ReleaseTriggerVoice, VoiceStealing) < 0) {
744 schoenebeck 354 dmsg(4,("Voice not triggered\n"));
745 schoenebeck 271 pKey->pActiveVoices->free(itNewVoice);
746 schoenebeck 233 }
747 schoenebeck 239 else { // on success
748     uint** ppKeyGroup = NULL;
749 schoenebeck 271 if (itNewVoice->KeyGroup) { // if this voice / key belongs to a key group
750 schoenebeck 411 ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];
751 schoenebeck 239 if (*ppKeyGroup) { // if there's already an active key in that key group
752 schoenebeck 411 midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[**ppKeyGroup];
753 schoenebeck 239 // kill all voices on the (other) key
754 schoenebeck 271 RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
755     RTList<Voice>::Iterator end = pOtherKey->pActiveVoices->end();
756     for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
757     if (itVoiceToBeKilled->Type != Voice::type_release_trigger) itVoiceToBeKilled->Kill(itNoteOnEvent);
758 schoenebeck 242 }
759 schoenebeck 239 }
760     }
761     if (!pKey->Active) { // mark as active key
762     pKey->Active = true;
763 schoenebeck 411 pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();
764 schoenebeck 271 *pKey->itSelf = itNoteOnEvent->Param.Note.Key;
765 schoenebeck 239 }
766 schoenebeck 271 if (itNewVoice->KeyGroup) {
767     *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group
768 schoenebeck 239 }
769 schoenebeck 271 if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)
770     return itNewVoice; // success
771 schoenebeck 233 }
772     }
773 schoenebeck 285 else if (VoiceStealing) {
774 schoenebeck 460 // try to steal one voice
775 schoenebeck 473 int result = StealVoice(pEngineChannel, itNoteOnEvent);
776     if (!result) { // voice stolen successfully
777     // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died
778     RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();
779     if (itStealEvent) {
780     *itStealEvent = *itNoteOnEvent; // copy event
781     itStealEvent->Param.Note.Layer = iLayer;
782     itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;
783     pKey->VoiceTheftsQueued++;
784     }
785     else dmsg(1,("Voice stealing queue full!\n"));
786 schoenebeck 285 }
787     }
788    
789 schoenebeck 271 return Pool<Voice>::Iterator(); // no free voice or error
790 schoenebeck 233 }
791    
792     /**
793 schoenebeck 250 * Will be called by LaunchVoice() method in case there are no free
794     * voices left. This method will select and kill one old voice for
795     * voice stealing and postpone the note-on event until the selected
796     * voice actually died.
797     *
798 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
799 schoenebeck 285 * @param itNoteOnEvent - key, velocity and time stamp of the event
800 schoenebeck 473 * @returns 0 on success, a value < 0 if no active voice could be picked for voice stealing
801 schoenebeck 250 */
802 schoenebeck 473 int Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
803 schoenebeck 460 if (!VoiceTheftsLeft) {
804 schoenebeck 554 dmsg(1,("Max. voice thefts per audio fragment reached (you may raise CONFIG_MAX_VOICES).\n"));
805 schoenebeck 473 return -1;
806 schoenebeck 460 }
807 schoenebeck 271 if (!pEventPool->poolIsEmpty()) {
808 schoenebeck 250
809 schoenebeck 460 RTList<Voice>::Iterator itSelectedVoice;
810 schoenebeck 250
811     // Select one voice for voice stealing
812 schoenebeck 554 switch (CONFIG_VOICE_STEAL_ALGO) {
813 schoenebeck 250
814     // try to pick the oldest voice on the key where the new
815     // voice should be spawned, if there is no voice on that
816 schoenebeck 563 // key, or no voice left to kill, then procceed with
817 schoenebeck 250 // 'oldestkey' algorithm
818 schoenebeck 460 case voice_steal_algo_oldestvoiceonkey: {
819     midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
820 schoenebeck 563 itSelectedVoice = pSelectedKey->pActiveVoices->first();
821     // proceed iterating if voice was created in this fragment cycle
822     while (itSelectedVoice && !itSelectedVoice->hasRendered()) ++itSelectedVoice;
823     // if we haven't found a voice then proceed with algorithm 'oldestkey'
824     if (itSelectedVoice && itSelectedVoice->hasRendered()) break;
825 schoenebeck 250 } // no break - intentional !
826    
827     // try to pick the oldest voice on the oldest active key
828 schoenebeck 563 // from the same engine channel
829 schoenebeck 460 // (caution: must stay after 'oldestvoiceonkey' algorithm !)
830 schoenebeck 250 case voice_steal_algo_oldestkey: {
831 schoenebeck 649 // if we already stole in this fragment, try to proceed on same key
832 schoenebeck 460 if (this->itLastStolenVoice) {
833     itSelectedVoice = this->itLastStolenVoice;
834 schoenebeck 649 do {
835     ++itSelectedVoice;
836     } while (itSelectedVoice && !itSelectedVoice->hasRendered()); // proceed iterating if voice was created in this fragment cycle
837     // found a "stealable" voice ?
838     if (itSelectedVoice && itSelectedVoice->hasRendered()) {
839     // remember which voice we stole, so we can simply proceed on next voice stealing
840     this->itLastStolenVoice = itSelectedVoice;
841 schoenebeck 460 break; // selection succeeded
842 schoenebeck 250 }
843     }
844 schoenebeck 649 // get (next) oldest key
845     RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKey) ? ++this->iuiLastStolenKey : pEngineChannel->pActiveKeys->first();
846     while (iuiSelectedKey) {
847     midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];
848 schoenebeck 659 itSelectedVoice = pSelectedKey->pActiveVoices->first();
849 schoenebeck 649 // proceed iterating if voice was created in this fragment cycle
850     while (itSelectedVoice && !itSelectedVoice->hasRendered()) ++itSelectedVoice;
851     // found a "stealable" voice ?
852     if (itSelectedVoice && itSelectedVoice->hasRendered()) {
853     // remember which voice on which key we stole, so we can simply proceed on next voice stealing
854     this->iuiLastStolenKey = iuiSelectedKey;
855     this->itLastStolenVoice = itSelectedVoice;
856     break; // selection succeeded
857     }
858     ++iuiSelectedKey; // get next oldest key
859     }
860 schoenebeck 250 break;
861     }
862    
863     // don't steal anything
864     case voice_steal_algo_none:
865     default: {
866     dmsg(1,("No free voice (voice stealing disabled)!\n"));
867 schoenebeck 473 return -1;
868 schoenebeck 250 }
869     }
870    
871 schoenebeck 563 // if we couldn't steal a voice from the same engine channel then
872     // steal oldest voice on the oldest key from any other engine channel
873 schoenebeck 649 // (the smaller engine channel number, the higher priority)
874     if (!itSelectedVoice || !itSelectedVoice->hasRendered()) {
875     EngineChannel* pSelectedChannel;
876     int iChannelIndex;
877     // select engine channel
878     if (pLastStolenChannel) {
879     pSelectedChannel = pLastStolenChannel;
880     iChannelIndex = pSelectedChannel->iEngineIndexSelf;
881     } else { // pick the engine channel followed by this engine channel
882     iChannelIndex = (pEngineChannel->iEngineIndexSelf + 1) % engineChannels.size();
883     pSelectedChannel = engineChannels[iChannelIndex];
884     }
885     // iterate through engine channels
886 schoenebeck 460 while (true) {
887 schoenebeck 649 // if we already stole in this fragment, try to proceed on same key
888     if (this->itLastStolenVoiceGlobally) {
889     itSelectedVoice = this->itLastStolenVoiceGlobally;
890     do {
891     ++itSelectedVoice;
892     } while (itSelectedVoice && !itSelectedVoice->hasRendered()); // proceed iterating if voice was created in this fragment cycle
893     // break if selection succeeded
894     if (itSelectedVoice && itSelectedVoice->hasRendered()) {
895     // remember which voice we stole, so we can simply proceed on next voice stealing
896     this->itLastStolenVoiceGlobally = itSelectedVoice;
897     break; // selection succeeded
898     }
899 schoenebeck 460 }
900 schoenebeck 649 // get (next) oldest key
901     RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKey) ? ++this->iuiLastStolenKey : pSelectedChannel->pActiveKeys->first();
902     while (iuiSelectedKey) {
903     midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];
904     itSelectedVoice = pSelectedKey->pActiveVoices->first();
905     // proceed iterating if voice was created in this fragment cycle
906     while (itSelectedVoice && !itSelectedVoice->hasRendered()) ++itSelectedVoice;
907     // found a "stealable" voice ?
908     if (itSelectedVoice && itSelectedVoice->hasRendered()) {
909     // remember which voice on which key on which engine channel we stole, so we can simply proceed on next voice stealing
910     this->iuiLastStolenKeyGlobally = iuiSelectedKey;
911     this->itLastStolenVoiceGlobally = itSelectedVoice;
912     this->pLastStolenChannel = pSelectedChannel;
913     break; // selection succeeded
914     }
915     ++iuiSelectedKey; // get next key on current engine channel
916     }
917     // get next engine channel
918 schoenebeck 460 iChannelIndex = (iChannelIndex + 1) % engineChannels.size();
919 schoenebeck 649 pSelectedChannel = engineChannels[iChannelIndex];
920 schoenebeck 460 }
921     }
922    
923 schoenebeck 563 #if CONFIG_DEVMODE
924 schoenebeck 473 if (!itSelectedVoice->IsActive()) {
925     dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));
926     return -1;
927     }
928 schoenebeck 563 #endif // CONFIG_DEVMODE
929 schoenebeck 287
930 schoenebeck 250 // now kill the selected voice
931 schoenebeck 659 itSelectedVoice->Kill(itNoteOnEvent);
932 schoenebeck 460
933     --VoiceTheftsLeft;
934 schoenebeck 473
935     return 0; // success
936 schoenebeck 250 }
937 schoenebeck 473 else {
938     dmsg(1,("Event pool emtpy!\n"));
939     return -1;
940     }
941 schoenebeck 250 }
942    
943     /**
944 schoenebeck 285 * Removes the given voice from the MIDI key's list of active voices.
945     * This method will be called when a voice went inactive, e.g. because
946     * it finished to playback its sample, finished its release stage or
947     * just was killed.
948 schoenebeck 53 *
949 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
950 schoenebeck 285 * @param itVoice - points to the voice to be freed
951 schoenebeck 53 */
952 schoenebeck 411 void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) {
953 schoenebeck 271 if (itVoice) {
954 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoice->MIDIKey];
955 schoenebeck 53
956 schoenebeck 271 uint keygroup = itVoice->KeyGroup;
957    
958 schoenebeck 53 // free the voice object
959 schoenebeck 271 pVoicePool->free(itVoice);
960 schoenebeck 53
961 schoenebeck 287 // if no other voices left and member of a key group, remove from key group
962     if (pKey->pActiveVoices->isEmpty() && keygroup) {
963 schoenebeck 411 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[keygroup];
964 schoenebeck 287 if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group
965 schoenebeck 53 }
966     }
967 schoenebeck 285 else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;
968 schoenebeck 53 }
969    
970     /**
971 schoenebeck 287 * Called when there's no more voice left on a key, this call will
972     * update the key info respectively.
973     *
974 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
975 schoenebeck 287 * @param pKey - key which is now inactive
976     */
977 schoenebeck 411 void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) {
978 schoenebeck 287 if (pKey->pActiveVoices->isEmpty()) {
979     pKey->Active = false;
980 schoenebeck 411 pEngineChannel->pActiveKeys->free(pKey->itSelf); // remove key from list of active keys
981 schoenebeck 287 pKey->itSelf = RTList<uint>::Iterator();
982     pKey->ReleaseTrigger = false;
983     pKey->pEvents->clear();
984     dmsg(3,("Key has no more voices now\n"));
985     }
986     else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n"));
987     }
988    
989     /**
990 schoenebeck 53 * Reacts on supported control change commands (e.g. pitch bend wheel,
991     * modulation wheel, aftertouch).
992     *
993 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
994 schoenebeck 271 * @param itControlChangeEvent - controller, value and time stamp of the event
995 schoenebeck 53 */
996 schoenebeck 411 void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) {
997 schoenebeck 271 dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
998 schoenebeck 53
999 schoenebeck 473 // update controller value in the engine channel's controller table
1000     pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
1001    
1002     // move event from the unsorted event list to the control change event list
1003     Pool<Event>::Iterator itControlChangeEventOnCCList = itControlChangeEvent.moveToEndOf(pEngineChannel->pCCEvents);
1004    
1005     switch (itControlChangeEventOnCCList->Param.CC.Controller) {
1006 schoenebeck 424 case 7: { // volume
1007     //TODO: not sample accurate yet
1008 schoenebeck 473 pEngineChannel->GlobalVolume = (float) itControlChangeEventOnCCList->Param.CC.Value / 127.0f;
1009 schoenebeck 424 break;
1010     }
1011     case 10: { // panpot
1012     //TODO: not sample accurate yet
1013 schoenebeck 473 const int pan = (int) itControlChangeEventOnCCList->Param.CC.Value - 64;
1014 schoenebeck 424 pEngineChannel->GlobalPanLeft = 1.0f - float(RTMath::Max(pan, 0)) / 63.0f;
1015     pEngineChannel->GlobalPanRight = 1.0f - float(RTMath::Min(pan, 0)) / -64.0f;
1016     break;
1017     }
1018     case 64: { // sustain
1019 schoenebeck 473 if (itControlChangeEventOnCCList->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {
1020 schoenebeck 53 dmsg(4,("PEDAL DOWN\n"));
1021 schoenebeck 411 pEngineChannel->SustainPedal = true;
1022 schoenebeck 53
1023     // cancel release process of voices if necessary
1024 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1025 schoenebeck 473 for (; iuiKey; ++iuiKey) {
1026     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1027     if (!pKey->KeyPressed) {
1028     RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1029     if (itNewEvent) {
1030     *itNewEvent = *itControlChangeEventOnCCList; // copy event to the key's own event list
1031     itNewEvent->Type = Event::type_cancel_release; // transform event type
1032 schoenebeck 53 }
1033 schoenebeck 473 else dmsg(1,("Event pool emtpy!\n"));
1034 schoenebeck 53 }
1035     }
1036     }
1037 schoenebeck 473 if (itControlChangeEventOnCCList->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {
1038 schoenebeck 53 dmsg(4,("PEDAL UP\n"));
1039 schoenebeck 411 pEngineChannel->SustainPedal = false;
1040 schoenebeck 53
1041     // release voices if their respective key is not pressed
1042 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1043 schoenebeck 473 for (; iuiKey; ++iuiKey) {
1044     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1045     if (!pKey->KeyPressed) {
1046     RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1047     if (itNewEvent) {
1048     *itNewEvent = *itControlChangeEventOnCCList; // copy event to the key's own event list
1049     itNewEvent->Type = Event::type_release; // transform event type
1050 schoenebeck 53 }
1051 schoenebeck 473 else dmsg(1,("Event pool emtpy!\n"));
1052 schoenebeck 53 }
1053     }
1054     }
1055     break;
1056     }
1057    
1058    
1059 schoenebeck 473 // Channel Mode Messages
1060    
1061     case 120: { // all sound off
1062     KillAllVoices(pEngineChannel, itControlChangeEventOnCCList);
1063     break;
1064     }
1065     case 121: { // reset all controllers
1066     pEngineChannel->ResetControllers();
1067     break;
1068     }
1069     case 123: { // all notes off
1070     ReleaseAllVoices(pEngineChannel, itControlChangeEventOnCCList);
1071     break;
1072     }
1073     }
1074 schoenebeck 53 }
1075    
1076     /**
1077 schoenebeck 244 * Reacts on MIDI system exclusive messages.
1078     *
1079 schoenebeck 271 * @param itSysexEvent - sysex data size and time stamp of the sysex event
1080 schoenebeck 244 */
1081 schoenebeck 271 void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {
1082 schoenebeck 244 RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader();
1083    
1084     uint8_t exclusive_status, id;
1085     if (!reader.pop(&exclusive_status)) goto free_sysex_data;
1086     if (!reader.pop(&id)) goto free_sysex_data;
1087     if (exclusive_status != 0xF0) goto free_sysex_data;
1088    
1089     switch (id) {
1090     case 0x41: { // Roland
1091 schoenebeck 493 dmsg(3,("Roland Sysex\n"));
1092 schoenebeck 244 uint8_t device_id, model_id, cmd_id;
1093     if (!reader.pop(&device_id)) goto free_sysex_data;
1094     if (!reader.pop(&model_id)) goto free_sysex_data;
1095     if (!reader.pop(&cmd_id)) goto free_sysex_data;
1096     if (model_id != 0x42 /*GS*/) goto free_sysex_data;
1097     if (cmd_id != 0x12 /*DT1*/) goto free_sysex_data;
1098    
1099     // command address
1100     uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB)
1101     const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later
1102     if (reader.read(&addr[0], 3) != 3) goto free_sysex_data;
1103     if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters
1104 schoenebeck 493 dmsg(3,("\tSystem Parameter\n"));
1105 schoenebeck 244 }
1106     else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters
1107 schoenebeck 493 dmsg(3,("\tCommon Parameter\n"));
1108 schoenebeck 244 }
1109     else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)
1110 schoenebeck 493 dmsg(3,("\tPart Parameter\n"));
1111     switch (addr[2]) {
1112 schoenebeck 244 case 0x40: { // scale tuning
1113 schoenebeck 493 dmsg(3,("\t\tScale Tuning\n"));
1114 schoenebeck 244 uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave
1115     if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data;
1116     uint8_t checksum;
1117 schoenebeck 493 if (!reader.pop(&checksum)) goto free_sysex_data;
1118 schoenebeck 563 #if CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1119     if (GSCheckSum(checksum_reader, 12)) goto free_sysex_data;
1120     #endif // CONFIG_ASSERT_GS_SYSEX_CHECKSUM
1121 schoenebeck 244 for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;
1122     AdjustScale((int8_t*) scale_tunes);
1123 schoenebeck 493 dmsg(3,("\t\t\tNew scale applied.\n"));
1124 schoenebeck 244 break;
1125     }
1126     }
1127     }
1128     else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)
1129     }
1130     else if (addr[0] == 0x41) { // Drum Setup Parameters
1131     }
1132     break;
1133     }
1134     }
1135    
1136     free_sysex_data: // finally free sysex data
1137 schoenebeck 271 pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);
1138 schoenebeck 244 }
1139    
1140     /**
1141     * Calculates the Roland GS sysex check sum.
1142     *
1143     * @param AddrReader - reader which currently points to the first GS
1144     * command address byte of the GS sysex message in
1145     * question
1146     * @param DataSize - size of the GS message data (in bytes)
1147     */
1148     uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) {
1149     RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader;
1150     uint bytes = 3 /*addr*/ + DataSize;
1151     uint8_t addr_and_data[bytes];
1152     reader.read(&addr_and_data[0], bytes);
1153     uint8_t sum = 0;
1154     for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];
1155     return 128 - sum % 128;
1156     }
1157    
1158     /**
1159     * Allows to tune each of the twelve semitones of an octave.
1160     *
1161     * @param ScaleTunes - detuning of all twelve semitones (in cents)
1162     */
1163     void Engine::AdjustScale(int8_t ScaleTunes[12]) {
1164     memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate
1165     }
1166    
1167     /**
1168 schoenebeck 473 * Releases all voices on an engine channel. All voices will go into
1169     * the release stage and thus it might take some time (e.g. dependant to
1170     * their envelope release time) until they actually die.
1171     *
1172     * @param pEngineChannel - engine channel on which all voices should be released
1173     * @param itReleaseEvent - event which caused this releasing of all voices
1174     */
1175     void Engine::ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent) {
1176     RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1177     while (iuiKey) {
1178     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1179     ++iuiKey;
1180     // append a 'release' event to the key's own event list
1181     RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
1182     if (itNewEvent) {
1183     *itNewEvent = *itReleaseEvent; // copy original event (to the key's event list)
1184     itNewEvent->Type = Event::type_release; // transform event type
1185     }
1186     else dmsg(1,("Event pool emtpy!\n"));
1187     }
1188     }
1189    
1190     /**
1191     * Kills all voices on an engine channel as soon as possible. Voices
1192     * won't get into release state, their volume level will be ramped down
1193     * as fast as possible.
1194     *
1195     * @param pEngineChannel - engine channel on which all voices should be killed
1196     * @param itKillEvent - event which caused this killing of all voices
1197     */
1198     void Engine::KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent) {
1199     RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
1200     RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
1201     while (iuiKey != end) { // iterate through all active keys
1202     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
1203     ++iuiKey;
1204     RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
1205     RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
1206     for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
1207     itVoice->Kill(itKillEvent);
1208     }
1209     }
1210     }
1211    
1212     /**
1213 schoenebeck 53 * Initialize the parameter sequence for the modulation destination given by
1214     * by 'dst' with the constant value given by val.
1215     */
1216     void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) {
1217     int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle();
1218 schoenebeck 80 float* m = &pSynthesisParameters[dst][0];
1219     for (int i = 0; i < maxsamples; i += 4) {
1220     m[i] = val;
1221     m[i+1] = val;
1222     m[i+2] = val;
1223     m[i+3] = val;
1224     }
1225 persson 438 }
1226 schoenebeck 53
1227     uint Engine::VoiceCount() {
1228     return ActiveVoiceCount;
1229     }
1230    
1231     uint Engine::VoiceCountMax() {
1232     return ActiveVoiceCountMax;
1233     }
1234    
1235     bool Engine::DiskStreamSupported() {
1236     return true;
1237     }
1238    
1239     uint Engine::DiskStreamCount() {
1240     return (pDiskThread) ? pDiskThread->ActiveStreamCount : 0;
1241     }
1242    
1243     uint Engine::DiskStreamCountMax() {
1244     return (pDiskThread) ? pDiskThread->ActiveStreamCountMax : 0;
1245     }
1246    
1247     String Engine::DiskStreamBufferFillBytes() {
1248     return pDiskThread->GetBufferFillBytes();
1249     }
1250    
1251     String Engine::DiskStreamBufferFillPercentage() {
1252     return pDiskThread->GetBufferFillPercentage();
1253     }
1254    
1255 senkov 112 String Engine::EngineName() {
1256 schoenebeck 475 return LS_GIG_ENGINE_NAME;
1257 senkov 112 }
1258    
1259 schoenebeck 53 String Engine::Description() {
1260     return "Gigasampler Engine";
1261     }
1262    
1263     String Engine::Version() {
1264 schoenebeck 659 String s = "$Revision: 1.42 $";
1265 schoenebeck 123 return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
1266 schoenebeck 53 }
1267    
1268     }} // namespace LinuxSampler::gig

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