/[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 460 - (hide annotations) (download)
Mon Mar 14 22:35:44 2005 UTC (19 years ago) by schoenebeck
File size: 48605 byte(s)
* spawning layered voices now within a loop instead of recursively (fixes
  segmentation fault under heavy voice count load and reduces stress on the
  stack)
* voice stealing operates on all engine channels now
* limit voice stealing to MAX_AUDIO_VOICES thefts per audio fragment cycle
* fixed keygroup handling (layered voices could kill each other)

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 53 Engine::Engine() {
100     pAudioOutputDevice = NULL;
101     pDiskThread = NULL;
102     pEventGenerator = NULL;
103 schoenebeck 244 pSysexBuffer = new RingBuffer<uint8_t>(SYSEX_BUFFER_SIZE, 0);
104     pEventQueue = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT, 0);
105 schoenebeck 271 pEventPool = new Pool<Event>(MAX_EVENTS_PER_FRAGMENT);
106 persson 438 pVoicePool = new Pool<Voice>(MAX_AUDIO_VOICES);
107 schoenebeck 271 pVoiceStealingQueue = new RTList<Event>(pEventPool);
108 schoenebeck 460 pGlobalEvents = new RTList<Event>(pEventPool);
109 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
110     iterVoice->SetEngine(this);
111 schoenebeck 53 }
112     pVoicePool->clear();
113    
114     pSynthesisParameters[0] = NULL; // we allocate when an audio device is connected
115 schoenebeck 80 pBasicFilterParameters = NULL;
116     pMainFilterParameters = NULL;
117 schoenebeck 123
118 schoenebeck 53 ResetInternal();
119     }
120    
121     Engine::~Engine() {
122     if (pDiskThread) {
123 senkov 329 dmsg(1,("Stopping disk thread..."));
124 schoenebeck 53 pDiskThread->StopThread();
125     delete pDiskThread;
126 senkov 329 dmsg(1,("OK\n"));
127 schoenebeck 53 }
128     if (pEventQueue) delete pEventQueue;
129     if (pEventPool) delete pEventPool;
130 schoenebeck 411 if (pVoicePool) {
131     pVoicePool->clear();
132     delete pVoicePool;
133     }
134 schoenebeck 53 if (pEventGenerator) delete pEventGenerator;
135 schoenebeck 80 if (pMainFilterParameters) delete[] pMainFilterParameters;
136     if (pBasicFilterParameters) delete[] pBasicFilterParameters;
137 schoenebeck 319 if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
138 schoenebeck 250 if (pVoiceStealingQueue) delete pVoiceStealingQueue;
139 schoenebeck 411 if (pSysexBuffer) delete pSysexBuffer;
140 schoenebeck 420 EngineFactory::Destroy(this);
141 schoenebeck 53 }
142    
143     void Engine::Enable() {
144     dmsg(3,("gig::Engine: enabling\n"));
145     EngineDisabled.PushAndUnlock(false, 2); // set condition object 'EngineDisabled' to false (wait max. 2s)
146 schoenebeck 64 dmsg(3,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe()));
147 schoenebeck 53 }
148    
149     void Engine::Disable() {
150     dmsg(3,("gig::Engine: disabling\n"));
151     bool* pWasDisabled = EngineDisabled.PushAndUnlock(true, 2); // wait max. 2s
152     if (!pWasDisabled) dmsg(3,("gig::Engine warning: Timeout waiting to disable engine.\n"));
153     }
154    
155     void Engine::DisableAndLock() {
156     dmsg(3,("gig::Engine: disabling\n"));
157     bool* pWasDisabled = EngineDisabled.Push(true, 2); // wait max. 2s
158     if (!pWasDisabled) dmsg(3,("gig::Engine warning: Timeout waiting to disable engine.\n"));
159     }
160    
161     /**
162     * Reset all voices and disk thread and clear input event queue and all
163     * control and status variables.
164     */
165     void Engine::Reset() {
166     DisableAndLock();
167     ResetInternal();
168     Enable();
169     }
170    
171     /**
172     * Reset all voices and disk thread and clear input event queue and all
173     * control and status variables. This method is not thread safe!
174     */
175     void Engine::ResetInternal() {
176     ActiveVoiceCount = 0;
177     ActiveVoiceCountMax = 0;
178    
179 schoenebeck 250 // reset voice stealing parameters
180     pVoiceStealingQueue->clear();
181 schoenebeck 460 itLastStolenVoice = RTList<Voice>::Iterator();
182     iuiLastStolenKey = RTList<uint>::Iterator();
183     pLastStolenChannel = NULL;
184 schoenebeck 250
185 schoenebeck 244 // reset to normal chromatic scale (means equal temper)
186     memset(&ScaleTuning[0], 0x00, 12);
187    
188 schoenebeck 53 // reset all voices
189 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
190     iterVoice->Reset();
191 schoenebeck 53 }
192     pVoicePool->clear();
193    
194     // reset disk thread
195     if (pDiskThread) pDiskThread->Reset();
196    
197     // delete all input events
198     pEventQueue->init();
199 persson 438 }
200 schoenebeck 53
201     void Engine::Connect(AudioOutputDevice* pAudioOut) {
202     pAudioOutputDevice = pAudioOut;
203    
204     ResetInternal();
205    
206     // inform audio driver for the need of two channels
207     try {
208     pAudioOutputDevice->AcquireChannels(2); // gig engine only stereo
209     }
210     catch (AudioOutputException e) {
211     String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message();
212     throw LinuxSamplerException(msg);
213     }
214 persson 438
215 schoenebeck 460 this->MaxSamplesPerCycle = pAudioOutputDevice->MaxSamplesPerCycle();
216     this->SampleRate = pAudioOutputDevice->SampleRate();
217 schoenebeck 225
218 schoenebeck 285 // FIXME: audio drivers with varying fragment sizes might be a problem here
219     MaxFadeOutPos = MaxSamplesPerCycle - int(double(SampleRate) * EG_MIN_RELEASE_TIME) - 1;
220     if (MaxFadeOutPos < 0)
221 schoenebeck 411 throw LinuxSamplerException("EG_MIN_RELEASE_TIME in EGADSR.h too big for current audio fragment size / sampling rate!");
222 schoenebeck 285
223 schoenebeck 53 // (re)create disk thread
224     if (this->pDiskThread) {
225 senkov 329 dmsg(1,("Stopping disk thread..."));
226 schoenebeck 53 this->pDiskThread->StopThread();
227     delete this->pDiskThread;
228 senkov 329 dmsg(1,("OK\n"));
229 schoenebeck 53 }
230     this->pDiskThread = new DiskThread(((pAudioOut->MaxSamplesPerCycle() << MAX_PITCH) << 1) + 6); //FIXME: assuming stereo
231     if (!pDiskThread) {
232     dmsg(0,("gig::Engine new diskthread = NULL\n"));
233     exit(EXIT_FAILURE);
234     }
235    
236 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
237     iterVoice->pDiskThread = this->pDiskThread;
238 schoenebeck 53 dmsg(3,("d"));
239     }
240     pVoicePool->clear();
241    
242     // (re)create event generator
243     if (pEventGenerator) delete pEventGenerator;
244     pEventGenerator = new EventGenerator(pAudioOut->SampleRate());
245    
246     // (re)allocate synthesis parameter matrix
247 schoenebeck 319 if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);
248 schoenebeck 361
249     #if defined(__APPLE__)
250     pSynthesisParameters[0] = (float *) malloc(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle());
251     #else
252 schoenebeck 319 pSynthesisParameters[0] = (float *) memalign(16,(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle()));
253 schoenebeck 361 #endif
254 schoenebeck 53 for (int dst = 1; dst < Event::destination_count; dst++)
255     pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();
256    
257 schoenebeck 80 // (re)allocate biquad filter parameter sequence
258     if (pBasicFilterParameters) delete[] pBasicFilterParameters;
259     if (pMainFilterParameters) delete[] pMainFilterParameters;
260     pBasicFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];
261     pMainFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];
262    
263 schoenebeck 53 dmsg(1,("Starting disk thread..."));
264     pDiskThread->StartThread();
265     dmsg(1,("OK\n"));
266    
267 schoenebeck 271 for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
268     if (!iterVoice->pDiskThread) {
269 schoenebeck 53 dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));
270     exit(EXIT_FAILURE);
271     }
272     }
273     }
274    
275 schoenebeck 412 void Engine::ClearEventLists() {
276 schoenebeck 460 pGlobalEvents->clear();
277 schoenebeck 412 }
278    
279 schoenebeck 53 /**
280 schoenebeck 460 * Copy all events from the engine's global input queue buffer to the
281     * engine's internal event list. This will be done at the beginning of
282     * each audio cycle (that is each RenderAudio() call) to distinguish
283     * all global events which have to be processed in the current audio
284     * cycle. These events are usually just SysEx messages. Every
285     * EngineChannel has it's own input event queue buffer and event list
286     * to handle common events like NoteOn, NoteOff and ControlChange
287     * events.
288 schoenebeck 412 *
289 schoenebeck 460 * @param Samples - number of sample points to be processed in the
290     * current audio cycle
291 schoenebeck 412 */
292 schoenebeck 460 void Engine::ImportEvents(uint Samples) {
293 schoenebeck 412 RingBuffer<Event>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader();
294     Event* pEvent;
295     while (true) {
296     // get next event from input event queue
297     if (!(pEvent = eventQueueReader.pop())) break;
298     // if younger event reached, ignore that and all subsequent ones for now
299     if (pEvent->FragmentPos() >= Samples) {
300     eventQueueReader--;
301     dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples));
302     pEvent->ResetFragmentPos();
303     break;
304     }
305     // copy event to internal event list
306 schoenebeck 460 if (pGlobalEvents->poolIsEmpty()) {
307 schoenebeck 412 dmsg(1,("Event pool emtpy!\n"));
308     break;
309     }
310 schoenebeck 460 *pGlobalEvents->allocAppend() = *pEvent;
311 schoenebeck 412 }
312     eventQueueReader.free(); // free all copied events from input queue
313 persson 438 }
314 schoenebeck 412
315     /**
316 schoenebeck 53 * Let this engine proceed to render the given amount of sample points. The
317     * calculated audio data of all voices of this engine will be placed into
318     * the engine's audio sum buffer which has to be copied and eventually be
319     * converted to the appropriate value range by the audio output class (e.g.
320     * AlsaIO or JackIO) right after.
321     *
322     * @param Samples - number of sample points to be rendered
323     * @returns 0 on success
324     */
325 schoenebeck 412 int Engine::RenderAudio(uint Samples) {
326 schoenebeck 53 dmsg(5,("RenderAudio(Samples=%d)\n", Samples));
327    
328 schoenebeck 412 // return if engine disabled
329 schoenebeck 53 if (EngineDisabled.Pop()) {
330     dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));
331     return 0;
332     }
333    
334 schoenebeck 293 // update time of start and end of this audio fragment (as events' time stamps relate to this)
335     pEventGenerator->UpdateFragmentTime(Samples);
336    
337 schoenebeck 412 // get all events from the engine's global input event queue which belong to the current fragment
338     // (these are usually just SysEx messages)
339 schoenebeck 460 ImportEvents(Samples);
340 schoenebeck 412
341     // process engine global events (these are currently only MIDI System Exclusive messages)
342     {
343 schoenebeck 460 RTList<Event>::Iterator itEvent = pGlobalEvents->first();
344     RTList<Event>::Iterator end = pGlobalEvents->end();
345 schoenebeck 412 for (; itEvent != end; ++itEvent) {
346     switch (itEvent->Type) {
347     case Event::type_sysex:
348     dmsg(5,("Engine: Sysex received\n"));
349     ProcessSysex(itEvent);
350     break;
351     }
352     }
353 schoenebeck 53 }
354 schoenebeck 412
355 schoenebeck 460 // We only allow a maximum of MAX_AUDIO_VOICES voices to be stolen
356     // in each audio fragment. All subsequent request for spawning new
357     // voices in the same audio fragment will be ignored.
358     VoiceTheftsLeft = MAX_AUDIO_VOICES;
359    
360 schoenebeck 412 // reset internal voice counter (just for statistic of active voices)
361     ActiveVoiceCountTemp = 0;
362    
363 schoenebeck 460
364     // render audio on all engine channels
365     for (int i = 0; i < engineChannels.size(); i++) {
366     if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
367     // handle events on that engine channel
368     ProcessEvents(engineChannels[i], Samples);
369     // render all 'normal', active voices
370     RenderActiveVoices(engineChannels[i], Samples);
371 schoenebeck 412 }
372    
373 schoenebeck 460 // now that all ordinary voices on ALL engine channels are rendered, render new stolen voices
374     RenderStolenVoices(Samples);
375    
376     // handle cleanup on all engine channels for the next audio fragment
377     for (int i = 0; i < engineChannels.size(); i++) {
378     if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded
379     PostProcess(engineChannels[i]);
380     }
381    
382    
383     // empty the engine's event list for the next audio fragment
384     ClearEventLists();
385    
386     // reset voice stealing for the next audio fragment
387     pVoiceStealingQueue->clear();
388     itLastStolenVoice = RTList<Voice>::Iterator();
389     iuiLastStolenKey = RTList<uint>::Iterator();
390     pLastStolenChannel = NULL;
391    
392 schoenebeck 412 // just some statistics about this engine instance
393     ActiveVoiceCount = ActiveVoiceCountTemp;
394     if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;
395    
396     return 0;
397     }
398    
399 schoenebeck 460 void Engine::ProcessEvents(EngineChannel* pEngineChannel, uint Samples) {
400 schoenebeck 412 // get all events from the engine channels's input event queue which belong to the current fragment
401     // (these are the common events like NoteOn, NoteOff, ControlChange, etc.)
402 schoenebeck 460 pEngineChannel->ImportEvents(Samples);
403 schoenebeck 53
404     // process events
405 schoenebeck 271 {
406 schoenebeck 460 RTList<Event>::Iterator itEvent = pEngineChannel->pEvents->first();
407     RTList<Event>::Iterator end = pEngineChannel->pEvents->end();
408 schoenebeck 271 for (; itEvent != end; ++itEvent) {
409     switch (itEvent->Type) {
410     case Event::type_note_on:
411     dmsg(5,("Engine: Note on received\n"));
412 schoenebeck 412 ProcessNoteOn((EngineChannel*)itEvent->pEngineChannel, itEvent);
413 schoenebeck 271 break;
414     case Event::type_note_off:
415     dmsg(5,("Engine: Note off received\n"));
416 schoenebeck 412 ProcessNoteOff((EngineChannel*)itEvent->pEngineChannel, itEvent);
417 schoenebeck 271 break;
418     case Event::type_control_change:
419     dmsg(5,("Engine: MIDI CC received\n"));
420 schoenebeck 412 ProcessControlChange((EngineChannel*)itEvent->pEngineChannel, itEvent);
421 schoenebeck 271 break;
422     case Event::type_pitchbend:
423     dmsg(5,("Engine: Pitchbend received\n"));
424 schoenebeck 412 ProcessPitchbend((EngineChannel*)itEvent->pEngineChannel, itEvent);
425 schoenebeck 271 break;
426     }
427 schoenebeck 53 }
428     }
429 schoenebeck 460 }
430 schoenebeck 53
431 schoenebeck 460 void Engine::RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples) {
432     RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
433     RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
434     while (iuiKey != end) { // iterate through all active keys
435     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
436     ++iuiKey;
437 schoenebeck 53
438 schoenebeck 460 RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
439     RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
440     for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
441     // now render current voice
442     itVoice->Render(Samples);
443     if (itVoice->IsActive()) ActiveVoiceCountTemp++; // still active
444     else { // voice reached end, is now inactive
445     FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices
446 schoenebeck 53 }
447     }
448     }
449 schoenebeck 460 }
450 schoenebeck 53
451 schoenebeck 460 void Engine::RenderStolenVoices(uint Samples) {
452     RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();
453     RTList<Event>::Iterator end = pVoiceStealingQueue->end();
454     for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {
455     EngineChannel* pEngineChannel = (EngineChannel*) itVoiceStealEvent->pEngineChannel;
456     Pool<Voice>::Iterator itNewVoice =
457     LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false);
458     if (itNewVoice) {
459     itNewVoice->Render(Samples);
460     if (itNewVoice->IsActive()) ActiveVoiceCountTemp++; // still active
461     else { // voice reached end, is now inactive
462     FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices
463 schoenebeck 250 }
464     }
465 schoenebeck 460 else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));
466 schoenebeck 250 }
467 schoenebeck 460 }
468 schoenebeck 250
469 schoenebeck 460 void Engine::PostProcess(EngineChannel* pEngineChannel) {
470 schoenebeck 287 // free all keys which have no active voices left
471     {
472 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
473     RTList<uint>::Iterator end = pEngineChannel->pActiveKeys->end();
474 schoenebeck 287 while (iuiKey != end) { // iterate through all active keys
475 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
476 schoenebeck 287 ++iuiKey;
477 schoenebeck 411 if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);
478 schoenebeck 287 #if DEVMODE
479     else { // FIXME: should be removed before the final release (purpose: just a sanity check for debugging)
480     RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();
481     RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
482     for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
483     if (itVoice->itKillEvent) {
484     dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));
485     }
486     }
487     }
488     #endif // DEVMODE
489     }
490     }
491 schoenebeck 460
492     // empty the engine channel's own event lists
493     pEngineChannel->ClearEventLists();
494 schoenebeck 412 }
495 schoenebeck 287
496 schoenebeck 53 /**
497 schoenebeck 244 * Will be called by the MIDI input device whenever a MIDI system
498     * exclusive message has arrived.
499     *
500     * @param pData - pointer to sysex data
501     * @param Size - lenght of sysex data (in bytes)
502     */
503     void Engine::SendSysex(void* pData, uint Size) {
504 schoenebeck 246 Event event = pEventGenerator->CreateEvent();
505     event.Type = Event::type_sysex;
506     event.Param.Sysex.Size = Size;
507 schoenebeck 412 event.pEngineChannel = NULL; // as Engine global event
508 schoenebeck 244 if (pEventQueue->write_space() > 0) {
509     if (pSysexBuffer->write_space() >= Size) {
510     // copy sysex data to input buffer
511     uint toWrite = Size;
512     uint8_t* pPos = (uint8_t*) pData;
513     while (toWrite) {
514     const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end());
515     pSysexBuffer->write(pPos, writeNow);
516     toWrite -= writeNow;
517     pPos += writeNow;
518    
519     }
520     // finally place sysex event into input event queue
521     pEventQueue->push(&event);
522     }
523     else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,SYSEX_BUFFER_SIZE));
524     }
525     else dmsg(1,("Engine: Input event queue full!"));
526     }
527    
528     /**
529 schoenebeck 53 * Assigns and triggers a new voice for the respective MIDI key.
530     *
531 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
532 schoenebeck 271 * @param itNoteOnEvent - key, velocity and time stamp of the event
533 schoenebeck 53 */
534 schoenebeck 411 void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
535 persson 438
536 schoenebeck 354 const int key = itNoteOnEvent->Param.Note.Key;
537    
538     // Change key dimension value if key is in keyswitching area
539 schoenebeck 411 {
540     const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;
541     if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)
542     pEngineChannel->CurrentKeyDimension = ((key - pInstrument->DimensionKeyRange.low) * 128) /
543     (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);
544     }
545 schoenebeck 354
546 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];
547 schoenebeck 354
548 schoenebeck 53 pKey->KeyPressed = true; // the MIDI key was now pressed down
549    
550     // cancel release process of voices on this key if needed
551 schoenebeck 411 if (pKey->Active && !pEngineChannel->SustainPedal) {
552 schoenebeck 271 RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();
553     if (itCancelReleaseEvent) {
554     *itCancelReleaseEvent = *itNoteOnEvent; // copy event
555     itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type
556 schoenebeck 239 }
557     else dmsg(1,("Event pool emtpy!\n"));
558 schoenebeck 53 }
559    
560 schoenebeck 271 // move note on event to the key's own event list
561     RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);
562    
563 schoenebeck 460 // allocate and trigger new voice(s) for the key
564     {
565     // first, get total amount of required voices (dependant on amount of layers)
566     ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEventOnKeyList->Param.Note.Key);
567     if (pRegion) {
568     int voicesRequired = pRegion->Layers;
569     // now launch the required amount of voices
570     for (int i = 0; i < voicesRequired; i++)
571     LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, i, false, true);
572     }
573     }
574 persson 438
575     pKey->RoundRobinIndex++;
576 schoenebeck 53 }
577    
578     /**
579     * Releases the voices on the given key if sustain pedal is not pressed.
580     * If sustain is pressed, the release of the note will be postponed until
581     * sustain pedal will be released or voice turned inactive by itself (e.g.
582     * due to completion of sample playback).
583     *
584 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
585 schoenebeck 271 * @param itNoteOffEvent - key, velocity and time stamp of the event
586 schoenebeck 53 */
587 schoenebeck 411 void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {
588     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
589 schoenebeck 53
590     pKey->KeyPressed = false; // the MIDI key was now released
591    
592     // release voices on this key if needed
593 schoenebeck 411 if (pKey->Active && !pEngineChannel->SustainPedal) {
594 schoenebeck 271 itNoteOffEvent->Type = Event::type_release; // transform event type
595 schoenebeck 53 }
596 schoenebeck 242
597 schoenebeck 271 // move event to the key's own event list
598     RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);
599    
600 schoenebeck 242 // spawn release triggered voice(s) if needed
601     if (pKey->ReleaseTrigger) {
602 schoenebeck 460 // first, get total amount of required voices (dependant on amount of layers)
603     ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOffEventOnKeyList->Param.Note.Key);
604     if (pRegion) {
605     int voicesRequired = pRegion->Layers;
606     // now launch the required amount of voices
607     for (int i = 0; i < voicesRequired; i++)
608     LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, i, true, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
609     }
610 schoenebeck 242 pKey->ReleaseTrigger = false;
611     }
612 schoenebeck 53 }
613    
614     /**
615     * Moves pitchbend event from the general (input) event list to the pitch
616     * event list.
617     *
618 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
619 schoenebeck 271 * @param itPitchbendEvent - absolute pitch value and time stamp of the event
620 schoenebeck 53 */
621 schoenebeck 411 void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) {
622     pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value
623 schoenebeck 460 itPitchbendEvent.moveToEndOf(pEngineChannel->pSynthesisEvents[Event::destination_vco]);
624 schoenebeck 53 }
625    
626     /**
627 schoenebeck 233 * Allocates and triggers a new voice. This method will usually be
628     * called by the ProcessNoteOn() method and by the voices itself
629     * (e.g. to spawn further voices on the same key for layered sounds).
630     *
631 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
632 schoenebeck 271 * @param itNoteOnEvent - key, velocity and time stamp of the event
633 schoenebeck 242 * @param iLayer - layer index for the new voice (optional - only
634     * in case of layered sounds of course)
635     * @param ReleaseTriggerVoice - if new voice is a release triggered voice
636     * (optional, default = false)
637 schoenebeck 250 * @param VoiceStealing - if voice stealing should be performed
638     * when there is no free voice
639     * (optional, default = true)
640     * @returns pointer to new voice or NULL if there was no free voice or
641 schoenebeck 354 * if the voice wasn't triggered (for example when no region is
642     * defined for the given key).
643 schoenebeck 233 */
644 schoenebeck 411 Pool<Voice>::Iterator Engine::LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing) {
645     midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
646 schoenebeck 233
647     // allocate a new voice for the key
648 schoenebeck 271 Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
649     if (itNewVoice) {
650 schoenebeck 233 // launch the new voice
651 schoenebeck 411 if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pEngineChannel->pInstrument, iLayer, ReleaseTriggerVoice, VoiceStealing) < 0) {
652 schoenebeck 354 dmsg(4,("Voice not triggered\n"));
653 schoenebeck 271 pKey->pActiveVoices->free(itNewVoice);
654 schoenebeck 233 }
655 schoenebeck 239 else { // on success
656     uint** ppKeyGroup = NULL;
657 schoenebeck 271 if (itNewVoice->KeyGroup) { // if this voice / key belongs to a key group
658 schoenebeck 411 ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];
659 schoenebeck 239 if (*ppKeyGroup) { // if there's already an active key in that key group
660 schoenebeck 411 midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[**ppKeyGroup];
661 schoenebeck 239 // kill all voices on the (other) key
662 schoenebeck 271 RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
663     RTList<Voice>::Iterator end = pOtherKey->pActiveVoices->end();
664     for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
665     if (itVoiceToBeKilled->Type != Voice::type_release_trigger) itVoiceToBeKilled->Kill(itNoteOnEvent);
666 schoenebeck 242 }
667 schoenebeck 239 }
668     }
669     if (!pKey->Active) { // mark as active key
670     pKey->Active = true;
671 schoenebeck 411 pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();
672 schoenebeck 271 *pKey->itSelf = itNoteOnEvent->Param.Note.Key;
673 schoenebeck 239 }
674 schoenebeck 271 if (itNewVoice->KeyGroup) {
675     *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group
676 schoenebeck 239 }
677 schoenebeck 271 if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)
678     return itNewVoice; // success
679 schoenebeck 233 }
680     }
681 schoenebeck 285 else if (VoiceStealing) {
682 schoenebeck 250
683 schoenebeck 460 // try to steal one voice
684     StealVoice(pEngineChannel, itNoteOnEvent);
685 schoenebeck 285
686     // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died
687     RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();
688     if (itStealEvent) {
689     *itStealEvent = *itNoteOnEvent; // copy event
690     itStealEvent->Param.Note.Layer = iLayer;
691     itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;
692     }
693     else dmsg(1,("Voice stealing queue full!\n"));
694     }
695    
696 schoenebeck 271 return Pool<Voice>::Iterator(); // no free voice or error
697 schoenebeck 233 }
698    
699     /**
700 schoenebeck 250 * Will be called by LaunchVoice() method in case there are no free
701     * voices left. This method will select and kill one old voice for
702     * voice stealing and postpone the note-on event until the selected
703     * voice actually died.
704     *
705 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
706 schoenebeck 285 * @param itNoteOnEvent - key, velocity and time stamp of the event
707 schoenebeck 250 */
708 schoenebeck 411 void Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {
709 schoenebeck 460 if (!VoiceTheftsLeft) {
710     dmsg(1,("Max. voice thefts per audio fragment reached (you may raise MAX_AUDIO_VOICES).\n"));
711     return;
712     }
713 schoenebeck 271 if (!pEventPool->poolIsEmpty()) {
714 schoenebeck 250
715 schoenebeck 460 RTList<Voice>::Iterator itSelectedVoice;
716 schoenebeck 250
717     // Select one voice for voice stealing
718     switch (VOICE_STEAL_ALGORITHM) {
719    
720     // try to pick the oldest voice on the key where the new
721     // voice should be spawned, if there is no voice on that
722     // key, or no voice left to kill there, then procceed with
723     // 'oldestkey' algorithm
724 schoenebeck 460 case voice_steal_algo_oldestvoiceonkey: {
725     #if 0 // FIXME: broken
726     midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
727     if (this->itLastStolenVoice) {
728     itSelectedVoice = this->itLastStolenVoice;
729     ++itSelectedVoice;
730 schoenebeck 250 }
731     else { // no voice stolen in this audio fragment cycle yet
732 schoenebeck 460 itSelectedVoice = pSelectedKey->pActiveVoices->first();
733 schoenebeck 250 }
734 schoenebeck 460 if (itSelectedVoice) {
735     iuiSelectedKey = pSelectedKey->itSelf;
736 schoenebeck 250 break; // selection succeeded
737     }
738 schoenebeck 460 #endif
739 schoenebeck 250 } // no break - intentional !
740    
741     // try to pick the oldest voice on the oldest active key
742 schoenebeck 460 // (caution: must stay after 'oldestvoiceonkey' algorithm !)
743 schoenebeck 250 case voice_steal_algo_oldestkey: {
744 schoenebeck 460 if (this->itLastStolenVoice) {
745     itSelectedVoice = this->itLastStolenVoice;
746     ++itSelectedVoice;
747     if (itSelectedVoice) break; // selection succeeded
748     RTList<uint>::Iterator iuiSelectedKey = this->iuiLastStolenKey;
749     ++iuiSelectedKey;
750     if (iuiSelectedKey) {
751     this->iuiLastStolenKey = iuiSelectedKey;
752     midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];
753     itSelectedVoice = pSelectedKey->pActiveVoices->first();
754     break; // selection succeeded
755 schoenebeck 250 }
756     }
757     break;
758     }
759    
760     // don't steal anything
761     case voice_steal_algo_none:
762     default: {
763     dmsg(1,("No free voice (voice stealing disabled)!\n"));
764     return;
765     }
766     }
767    
768 schoenebeck 460 // steal oldest voice on the oldest key from this or any other engine channel
769     if (!itSelectedVoice) {
770     EngineChannel* pSelectedChannel = (pLastStolenChannel) ? pLastStolenChannel : pEngineChannel;
771     int iChannelIndex = pSelectedChannel->iEngineIndexSelf;
772     while (true) {
773     RTList<uint>::Iterator iuiSelectedKey = pSelectedChannel->pActiveKeys->first();
774     if (iuiSelectedKey) {
775     midi_key_info_t* pSelectedKey = &pSelectedChannel->pMIDIKeyInfo[*iuiSelectedKey];
776     itSelectedVoice = pSelectedKey->pActiveVoices->first();
777     iuiLastStolenKey = iuiSelectedKey;
778     pLastStolenChannel = pSelectedChannel;
779     break; // selection succeeded
780     }
781     iChannelIndex = (iChannelIndex + 1) % engineChannels.size();
782     pSelectedChannel = engineChannels[iChannelIndex];
783     }
784     }
785    
786 schoenebeck 287 //FIXME: can be removed, just a sanity check for debugging
787 schoenebeck 460 if (!itSelectedVoice->IsActive()) dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));
788 schoenebeck 287
789 schoenebeck 250 // now kill the selected voice
790 schoenebeck 460 itSelectedVoice->Kill(itNoteOnEvent);
791    
792     // remember which voice we stole, so we can simply proceed for the next voice stealing
793     itLastStolenVoice = itSelectedVoice;
794    
795     --VoiceTheftsLeft;
796 schoenebeck 250 }
797     else dmsg(1,("Event pool emtpy!\n"));
798     }
799    
800     /**
801 schoenebeck 285 * Removes the given voice from the MIDI key's list of active voices.
802     * This method will be called when a voice went inactive, e.g. because
803     * it finished to playback its sample, finished its release stage or
804     * just was killed.
805 schoenebeck 53 *
806 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
807 schoenebeck 285 * @param itVoice - points to the voice to be freed
808 schoenebeck 53 */
809 schoenebeck 411 void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) {
810 schoenebeck 271 if (itVoice) {
811 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoice->MIDIKey];
812 schoenebeck 53
813 schoenebeck 271 uint keygroup = itVoice->KeyGroup;
814    
815 schoenebeck 53 // free the voice object
816 schoenebeck 271 pVoicePool->free(itVoice);
817 schoenebeck 53
818 schoenebeck 287 // if no other voices left and member of a key group, remove from key group
819     if (pKey->pActiveVoices->isEmpty() && keygroup) {
820 schoenebeck 411 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[keygroup];
821 schoenebeck 287 if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group
822 schoenebeck 53 }
823     }
824 schoenebeck 285 else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;
825 schoenebeck 53 }
826    
827     /**
828 schoenebeck 287 * Called when there's no more voice left on a key, this call will
829     * update the key info respectively.
830     *
831 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
832 schoenebeck 287 * @param pKey - key which is now inactive
833     */
834 schoenebeck 411 void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) {
835 schoenebeck 287 if (pKey->pActiveVoices->isEmpty()) {
836     pKey->Active = false;
837 schoenebeck 411 pEngineChannel->pActiveKeys->free(pKey->itSelf); // remove key from list of active keys
838 schoenebeck 287 pKey->itSelf = RTList<uint>::Iterator();
839     pKey->ReleaseTrigger = false;
840     pKey->pEvents->clear();
841     dmsg(3,("Key has no more voices now\n"));
842     }
843     else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n"));
844     }
845    
846     /**
847 schoenebeck 53 * Reacts on supported control change commands (e.g. pitch bend wheel,
848     * modulation wheel, aftertouch).
849     *
850 schoenebeck 411 * @param pEngineChannel - engine channel on which this event occured on
851 schoenebeck 271 * @param itControlChangeEvent - controller, value and time stamp of the event
852 schoenebeck 53 */
853 schoenebeck 411 void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) {
854 schoenebeck 271 dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
855 schoenebeck 53
856 schoenebeck 271 switch (itControlChangeEvent->Param.CC.Controller) {
857 schoenebeck 424 case 7: { // volume
858     //TODO: not sample accurate yet
859     pEngineChannel->GlobalVolume = (float) itControlChangeEvent->Param.CC.Value / 127.0f;
860     break;
861     }
862     case 10: { // panpot
863     //TODO: not sample accurate yet
864     const int pan = (int) itControlChangeEvent->Param.CC.Value - 64;
865     pEngineChannel->GlobalPanLeft = 1.0f - float(RTMath::Max(pan, 0)) / 63.0f;
866     pEngineChannel->GlobalPanRight = 1.0f - float(RTMath::Min(pan, 0)) / -64.0f;
867     break;
868     }
869     case 64: { // sustain
870 schoenebeck 411 if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {
871 schoenebeck 53 dmsg(4,("PEDAL DOWN\n"));
872 schoenebeck 411 pEngineChannel->SustainPedal = true;
873 schoenebeck 53
874     // cancel release process of voices if necessary
875 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
876 schoenebeck 271 if (iuiKey) {
877     itControlChangeEvent->Type = Event::type_cancel_release; // transform event type
878     while (iuiKey) {
879 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
880 schoenebeck 271 ++iuiKey;
881 schoenebeck 53 if (!pKey->KeyPressed) {
882 schoenebeck 271 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
883     if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
884 schoenebeck 53 else dmsg(1,("Event pool emtpy!\n"));
885     }
886     }
887     }
888     }
889 schoenebeck 411 if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {
890 schoenebeck 53 dmsg(4,("PEDAL UP\n"));
891 schoenebeck 411 pEngineChannel->SustainPedal = false;
892 schoenebeck 53
893     // release voices if their respective key is not pressed
894 schoenebeck 411 RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();
895 schoenebeck 271 if (iuiKey) {
896     itControlChangeEvent->Type = Event::type_release; // transform event type
897     while (iuiKey) {
898 schoenebeck 411 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];
899 schoenebeck 271 ++iuiKey;
900 schoenebeck 53 if (!pKey->KeyPressed) {
901 schoenebeck 271 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
902     if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
903 schoenebeck 53 else dmsg(1,("Event pool emtpy!\n"));
904     }
905     }
906     }
907     }
908     break;
909     }
910     }
911    
912     // update controller value in the engine's controller table
913 schoenebeck 411 pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
914 schoenebeck 53
915     // move event from the unsorted event list to the control change event list
916 schoenebeck 460 itControlChangeEvent.moveToEndOf(pEngineChannel->pCCEvents);
917 schoenebeck 53 }
918    
919     /**
920 schoenebeck 244 * Reacts on MIDI system exclusive messages.
921     *
922 schoenebeck 271 * @param itSysexEvent - sysex data size and time stamp of the sysex event
923 schoenebeck 244 */
924 schoenebeck 271 void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {
925 schoenebeck 244 RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader();
926    
927     uint8_t exclusive_status, id;
928     if (!reader.pop(&exclusive_status)) goto free_sysex_data;
929     if (!reader.pop(&id)) goto free_sysex_data;
930     if (exclusive_status != 0xF0) goto free_sysex_data;
931    
932     switch (id) {
933     case 0x41: { // Roland
934     uint8_t device_id, model_id, cmd_id;
935     if (!reader.pop(&device_id)) goto free_sysex_data;
936     if (!reader.pop(&model_id)) goto free_sysex_data;
937     if (!reader.pop(&cmd_id)) goto free_sysex_data;
938     if (model_id != 0x42 /*GS*/) goto free_sysex_data;
939     if (cmd_id != 0x12 /*DT1*/) goto free_sysex_data;
940    
941     // command address
942     uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB)
943     const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later
944     if (reader.read(&addr[0], 3) != 3) goto free_sysex_data;
945     if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters
946     }
947     else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters
948     }
949     else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)
950     switch (addr[3]) {
951     case 0x40: { // scale tuning
952     uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave
953     if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data;
954     uint8_t checksum;
955     if (!reader.pop(&checksum)) goto free_sysex_data;
956     if (GSCheckSum(checksum_reader, 12) != checksum) goto free_sysex_data;
957     for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;
958     AdjustScale((int8_t*) scale_tunes);
959     break;
960     }
961     }
962     }
963     else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)
964     }
965     else if (addr[0] == 0x41) { // Drum Setup Parameters
966     }
967     break;
968     }
969     }
970    
971     free_sysex_data: // finally free sysex data
972 schoenebeck 271 pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);
973 schoenebeck 244 }
974    
975     /**
976     * Calculates the Roland GS sysex check sum.
977     *
978     * @param AddrReader - reader which currently points to the first GS
979     * command address byte of the GS sysex message in
980     * question
981     * @param DataSize - size of the GS message data (in bytes)
982     */
983     uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) {
984     RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader;
985     uint bytes = 3 /*addr*/ + DataSize;
986     uint8_t addr_and_data[bytes];
987     reader.read(&addr_and_data[0], bytes);
988     uint8_t sum = 0;
989     for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];
990     return 128 - sum % 128;
991     }
992    
993     /**
994     * Allows to tune each of the twelve semitones of an octave.
995     *
996     * @param ScaleTunes - detuning of all twelve semitones (in cents)
997     */
998     void Engine::AdjustScale(int8_t ScaleTunes[12]) {
999     memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate
1000     }
1001    
1002     /**
1003 schoenebeck 53 * Initialize the parameter sequence for the modulation destination given by
1004     * by 'dst' with the constant value given by val.
1005     */
1006     void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) {
1007     int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle();
1008 schoenebeck 80 float* m = &pSynthesisParameters[dst][0];
1009     for (int i = 0; i < maxsamples; i += 4) {
1010     m[i] = val;
1011     m[i+1] = val;
1012     m[i+2] = val;
1013     m[i+3] = val;
1014     }
1015 persson 438 }
1016 schoenebeck 53
1017     uint Engine::VoiceCount() {
1018     return ActiveVoiceCount;
1019     }
1020    
1021     uint Engine::VoiceCountMax() {
1022     return ActiveVoiceCountMax;
1023     }
1024    
1025     bool Engine::DiskStreamSupported() {
1026     return true;
1027     }
1028    
1029     uint Engine::DiskStreamCount() {
1030     return (pDiskThread) ? pDiskThread->ActiveStreamCount : 0;
1031     }
1032    
1033     uint Engine::DiskStreamCountMax() {
1034     return (pDiskThread) ? pDiskThread->ActiveStreamCountMax : 0;
1035     }
1036    
1037     String Engine::DiskStreamBufferFillBytes() {
1038     return pDiskThread->GetBufferFillBytes();
1039     }
1040    
1041     String Engine::DiskStreamBufferFillPercentage() {
1042     return pDiskThread->GetBufferFillPercentage();
1043     }
1044    
1045 senkov 112 String Engine::EngineName() {
1046     return "GigEngine";
1047     }
1048    
1049 schoenebeck 53 String Engine::Description() {
1050     return "Gigasampler Engine";
1051     }
1052    
1053     String Engine::Version() {
1054 schoenebeck 460 String s = "$Revision: 1.31 $";
1055 schoenebeck 123 return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
1056 schoenebeck 53 }
1057    
1058     }} // namespace LinuxSampler::gig

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