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

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revision 53 by schoenebeck, Mon Apr 26 17:15:51 2004 UTC revision 285 by schoenebeck, Thu Oct 14 21:31:26 2004 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003 by Benno Senoner and Christian Schoenebeck         *   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
6   *                                                                         *   *                                                                         *
7   *   This program is free software; you can redistribute it and/or modify  *   *   This program is free software; you can redistribute it and/or modify  *
8   *   it under the terms of the GNU General Public License as published by  *   *   it under the terms of the GNU General Public License as published by  *
# Line 23  Line 23 
23  #include <sstream>  #include <sstream>
24  #include "DiskThread.h"  #include "DiskThread.h"
25  #include "Voice.h"  #include "Voice.h"
26    #include "EGADSR.h"
27    
28  #include "Engine.h"  #include "Engine.h"
29    
# Line 37  namespace LinuxSampler { namespace gig { Line 38  namespace LinuxSampler { namespace gig {
38          pAudioOutputDevice = NULL;          pAudioOutputDevice = NULL;
39          pDiskThread        = NULL;          pDiskThread        = NULL;
40          pEventGenerator    = NULL;          pEventGenerator    = NULL;
41          pEventQueue        = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT);          pSysexBuffer       = new RingBuffer<uint8_t>(SYSEX_BUFFER_SIZE, 0);
42          pEventPool         = new RTELMemoryPool<Event>(MAX_EVENTS_PER_FRAGMENT);          pEventQueue        = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT, 0);
43          pVoicePool         = new RTELMemoryPool<Voice>(MAX_AUDIO_VOICES);          pEventPool         = new Pool<Event>(MAX_EVENTS_PER_FRAGMENT);
44          pActiveKeys        = new RTELMemoryPool<uint>(128);          pVoicePool         = new Pool<Voice>(MAX_AUDIO_VOICES);
45          pEvents            = new RTEList<Event>(pEventPool);          pActiveKeys        = new Pool<uint>(128);
46          pCCEvents          = new RTEList<Event>(pEventPool);          pVoiceStealingQueue = new RTList<Event>(pEventPool);
47            pEvents            = new RTList<Event>(pEventPool);
48            pCCEvents          = new RTList<Event>(pEventPool);
49          for (uint i = 0; i < Event::destination_count; i++) {          for (uint i = 0; i < Event::destination_count; i++) {
50              pSynthesisEvents[i] = new RTEList<Event>(pEventPool);              pSynthesisEvents[i] = new RTList<Event>(pEventPool);
51          }          }
52          for (uint i = 0; i < 128; i++) {          for (uint i = 0; i < 128; i++) {
53              pMIDIKeyInfo[i].pActiveVoices = new RTEList<Voice>(pVoicePool);              pMIDIKeyInfo[i].pActiveVoices  = new RTList<Voice>(pVoicePool);
54              pMIDIKeyInfo[i].KeyPressed    = false;              pMIDIKeyInfo[i].KeyPressed     = false;
55              pMIDIKeyInfo[i].Active        = false;              pMIDIKeyInfo[i].Active         = false;
56              pMIDIKeyInfo[i].pSelf         = NULL;              pMIDIKeyInfo[i].ReleaseTrigger = false;
57              pMIDIKeyInfo[i].pEvents       = new RTEList<Event>(pEventPool);              pMIDIKeyInfo[i].pEvents        = new RTList<Event>(pEventPool);
58          }          }
59          for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
60              pVoice->SetEngine(this);              iterVoice->SetEngine(this);
61          }          }
62          pVoicePool->clear();          pVoicePool->clear();
63    
64          pSynthesisParameters[0] = NULL; // we allocate when an audio device is connected          pSynthesisParameters[0] = NULL; // we allocate when an audio device is connected
65            pBasicFilterParameters  = NULL;
66            pMainFilterParameters   = NULL;
67    
68            InstrumentIdx = -1;
69            InstrumentStat = -1;
70    
71            AudioDeviceChannelLeft  = -1;
72            AudioDeviceChannelRight = -1;
73    
74          ResetInternal();          ResetInternal();
75      }      }
# Line 84  namespace LinuxSampler { namespace gig { Line 95  namespace LinuxSampler { namespace gig {
95          if (pEventPool)  delete pEventPool;          if (pEventPool)  delete pEventPool;
96          if (pVoicePool)  delete pVoicePool;          if (pVoicePool)  delete pVoicePool;
97          if (pActiveKeys) delete pActiveKeys;          if (pActiveKeys) delete pActiveKeys;
98            if (pSysexBuffer) delete pSysexBuffer;
99          if (pEventGenerator) delete pEventGenerator;          if (pEventGenerator) delete pEventGenerator;
100            if (pMainFilterParameters) delete[] pMainFilterParameters;
101            if (pBasicFilterParameters) delete[] pBasicFilterParameters;
102          if (pSynthesisParameters[0]) delete[] pSynthesisParameters[0];          if (pSynthesisParameters[0]) delete[] pSynthesisParameters[0];
103            if (pVoiceStealingQueue) delete pVoiceStealingQueue;
104      }      }
105    
106      void Engine::Enable() {      void Engine::Enable() {
107          dmsg(3,("gig::Engine: enabling\n"));          dmsg(3,("gig::Engine: enabling\n"));
108          EngineDisabled.PushAndUnlock(false, 2); // set condition object 'EngineDisabled' to false (wait max. 2s)          EngineDisabled.PushAndUnlock(false, 2); // set condition object 'EngineDisabled' to false (wait max. 2s)
109          dmsg(1,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe()));          dmsg(3,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe()));
110      }      }
111    
112      void Engine::Disable() {      void Engine::Disable() {
# Line 142  namespace LinuxSampler { namespace gig { Line 157  namespace LinuxSampler { namespace gig {
157          SustainPedal        = false;          SustainPedal        = false;
158          ActiveVoiceCount    = 0;          ActiveVoiceCount    = 0;
159          ActiveVoiceCountMax = 0;          ActiveVoiceCountMax = 0;
160            GlobalVolume        = 1.0;
161    
162            // reset voice stealing parameters
163            itLastStolenVoice = RTList<Voice>::Iterator();
164            iuiLastStolenKey  = RTList<uint>::Iterator();
165            pVoiceStealingQueue->clear();
166    
167            // reset to normal chromatic scale (means equal temper)
168            memset(&ScaleTuning[0], 0x00, 12);
169    
170          // set all MIDI controller values to zero          // set all MIDI controller values to zero
171          memset(ControllerTable, 0x00, 128);          memset(ControllerTable, 0x00, 128);
# Line 150  namespace LinuxSampler { namespace gig { Line 174  namespace LinuxSampler { namespace gig {
174          for (uint i = 0; i < 128; i++) {          for (uint i = 0; i < 128; i++) {
175              pMIDIKeyInfo[i].pActiveVoices->clear();              pMIDIKeyInfo[i].pActiveVoices->clear();
176              pMIDIKeyInfo[i].pEvents->clear();              pMIDIKeyInfo[i].pEvents->clear();
177              pMIDIKeyInfo[i].KeyPressed = false;              pMIDIKeyInfo[i].KeyPressed     = false;
178              pMIDIKeyInfo[i].Active     = false;              pMIDIKeyInfo[i].Active         = false;
179              pMIDIKeyInfo[i].pSelf      = NULL;              pMIDIKeyInfo[i].ReleaseTrigger = false;
180                pMIDIKeyInfo[i].itSelf         = Pool<uint>::Iterator();
181          }          }
182    
183            // reset all key groups
184            map<uint,uint*>::iterator iter = ActiveKeyGroups.begin();
185            for (; iter != ActiveKeyGroups.end(); iter++) iter->second = NULL;
186    
187          // reset all voices          // reset all voices
188          for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
189              pVoice->Reset();              iterVoice->Reset();
190          }          }
191          pVoicePool->clear();          pVoicePool->clear();
192    
# Line 191  namespace LinuxSampler { namespace gig { Line 220  namespace LinuxSampler { namespace gig {
220              Instruments.HandBack(pInstrument, this);              Instruments.HandBack(pInstrument, this);
221          }          }
222    
223            InstrumentFile = FileName;
224            InstrumentIdx = Instrument;
225            InstrumentStat = 0;
226    
227            // delete all key groups
228            ActiveKeyGroups.clear();
229    
230          // request gig instrument from instrument manager          // request gig instrument from instrument manager
231          try {          try {
232              instrument_id_t instrid;              instrument_id_t instrid;
# Line 198  namespace LinuxSampler { namespace gig { Line 234  namespace LinuxSampler { namespace gig {
234              instrid.iInstrument = Instrument;              instrid.iInstrument = Instrument;
235              pInstrument = Instruments.Borrow(instrid, this);              pInstrument = Instruments.Borrow(instrid, this);
236              if (!pInstrument) {              if (!pInstrument) {
237                    InstrumentStat = -1;
238                  dmsg(1,("no instrument loaded!!!\n"));                  dmsg(1,("no instrument loaded!!!\n"));
239                  exit(EXIT_FAILURE);                  exit(EXIT_FAILURE);
240              }              }
241          }          }
242          catch (RIFF::Exception e) {          catch (RIFF::Exception e) {
243                InstrumentStat = -2;
244              String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message;              String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message;
245              throw LinuxSamplerException(msg);              throw LinuxSamplerException(msg);
246          }          }
247          catch (InstrumentResourceManagerException e) {          catch (InstrumentResourceManagerException e) {
248                InstrumentStat = -3;
249              String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message();              String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message();
250              throw LinuxSamplerException(msg);              throw LinuxSamplerException(msg);
251          }          }
252          catch (...) {          catch (...) {
253                InstrumentStat = -4;
254              throw LinuxSamplerException("gig::Engine error: Failed to load instrument, cause: Unknown exception while trying to parse gig file.");              throw LinuxSamplerException("gig::Engine error: Failed to load instrument, cause: Unknown exception while trying to parse gig file.");
255          }          }
256    
257            // rebuild ActiveKeyGroups map with key groups of current instrument
258            for (::gig::Region* pRegion = pInstrument->GetFirstRegion(); pRegion; pRegion = pInstrument->GetNextRegion())
259                if (pRegion->KeyGroup) ActiveKeyGroups[pRegion->KeyGroup] = NULL;
260    
261            InstrumentStat = 100;
262    
263          // inform audio driver for the need of two channels          // inform audio driver for the need of two channels
264          try {          try {
265              if (pAudioOutputDevice) pAudioOutputDevice->AcquireChannels(2); // gig Engine only stereo              if (pAudioOutputDevice) pAudioOutputDevice->AcquireChannels(2); // gig Engine only stereo
# Line 243  namespace LinuxSampler { namespace gig { Line 289  namespace LinuxSampler { namespace gig {
289       * update process was completed, so we can continue with playback.       * update process was completed, so we can continue with playback.
290       */       */
291      void Engine::ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg) {      void Engine::ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg) {
292          this->pInstrument = pNewResource;          this->pInstrument = pNewResource; //TODO: there are couple of engine parameters we should update here as well if the instrument was updated (see LoadInstrument())
293          Enable();          Enable();
294      }      }
295    
# Line 261  namespace LinuxSampler { namespace gig { Line 307  namespace LinuxSampler { namespace gig {
307              throw LinuxSamplerException(msg);              throw LinuxSamplerException(msg);
308          }          }
309    
310            this->AudioDeviceChannelLeft  = 0;
311            this->AudioDeviceChannelRight = 1;
312            this->pOutputLeft             = pAudioOutputDevice->Channel(0)->Buffer();
313            this->pOutputRight            = pAudioOutputDevice->Channel(1)->Buffer();
314            this->MaxSamplesPerCycle      = pAudioOutputDevice->MaxSamplesPerCycle();
315            this->SampleRate              = pAudioOutputDevice->SampleRate();
316    
317            // FIXME: audio drivers with varying fragment sizes might be a problem here
318            MaxFadeOutPos = MaxSamplesPerCycle - int(double(SampleRate) * EG_MIN_RELEASE_TIME) - 1;
319            if (MaxFadeOutPos < 0)
320                throw LinuxSamplerException("EG_MIN_RELEASE_TIME in EGADSR.h to big for current audio fragment size / sampling rate!");
321    
322          // (re)create disk thread          // (re)create disk thread
323          if (this->pDiskThread) {          if (this->pDiskThread) {
324              this->pDiskThread->StopThread();              this->pDiskThread->StopThread();
# Line 272  namespace LinuxSampler { namespace gig { Line 330  namespace LinuxSampler { namespace gig {
330              exit(EXIT_FAILURE);              exit(EXIT_FAILURE);
331          }          }
332    
333          for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
334              pVoice->pDiskThread = this->pDiskThread;              iterVoice->pDiskThread = this->pDiskThread;
             pVoice->SetOutput(pAudioOut);  
335              dmsg(3,("d"));              dmsg(3,("d"));
336          }          }
337          pVoicePool->clear();          pVoicePool->clear();
# Line 289  namespace LinuxSampler { namespace gig { Line 346  namespace LinuxSampler { namespace gig {
346          for (int dst = 1; dst < Event::destination_count; dst++)          for (int dst = 1; dst < Event::destination_count; dst++)
347              pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();              pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();
348    
349            // (re)allocate biquad filter parameter sequence
350            if (pBasicFilterParameters) delete[] pBasicFilterParameters;
351            if (pMainFilterParameters)  delete[] pMainFilterParameters;
352            pBasicFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];
353            pMainFilterParameters  = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];
354    
355          dmsg(1,("Starting disk thread..."));          dmsg(1,("Starting disk thread..."));
356          pDiskThread->StartThread();          pDiskThread->StartThread();
357          dmsg(1,("OK\n"));          dmsg(1,("OK\n"));
358    
359          for (Voice* pVoice = pVoicePool->first(); pVoice; pVoice = pVoicePool->next()) {          for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {
360              if (!pVoice->pDiskThread) {              if (!iterVoice->pDiskThread) {
361                  dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));                  dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));
362                  exit(EXIT_FAILURE);                  exit(EXIT_FAILURE);
363              }              }
# Line 306  namespace LinuxSampler { namespace gig { Line 369  namespace LinuxSampler { namespace gig {
369              AudioOutputDevice* olddevice = pAudioOutputDevice;              AudioOutputDevice* olddevice = pAudioOutputDevice;
370              pAudioOutputDevice = NULL;              pAudioOutputDevice = NULL;
371              olddevice->Disconnect(this);              olddevice->Disconnect(this);
372                AudioDeviceChannelLeft  = -1;
373                AudioDeviceChannelRight = -1;
374          }          }
375      }      }
376    
# Line 339  namespace LinuxSampler { namespace gig { Line 404  namespace LinuxSampler { namespace gig {
404          for (uint i = 0; i < Event::destination_count; i++) {          for (uint i = 0; i < Event::destination_count; i++) {
405              pSynthesisEvents[i]->clear();              pSynthesisEvents[i]->clear();
406          }          }
407            {
408                RTList<uint>::Iterator iuiKey = pActiveKeys->first();
409                RTList<uint>::Iterator end    = pActiveKeys->end();
410                for(; iuiKey != end; ++iuiKey) {
411                    pMIDIKeyInfo[*iuiKey].pEvents->clear(); // free all events on the key
412                }
413            }
414    
415          // read and copy events from input queue          // read and copy events from input queue
416          Event event = pEventGenerator->CreateEvent();          Event event = pEventGenerator->CreateEvent();
417          while (true) {          while (true) {
418              if (!pEventQueue->pop(&event)) break;              if (!pEventQueue->pop(&event) || pEvents->poolIsEmpty()) break;
419              pEvents->alloc_assign(event);              *pEvents->allocAppend() = event;
420          }          }
421    
422    
# Line 353  namespace LinuxSampler { namespace gig { Line 425  namespace LinuxSampler { namespace gig {
425    
426    
427          // process events          // process events
428          Event* pNextEvent = pEvents->first();          {
429          while (pNextEvent) {              RTList<Event>::Iterator itEvent = pEvents->first();
430              Event* pEvent = pNextEvent;              RTList<Event>::Iterator end     = pEvents->end();
431              pEvents->set_current(pEvent);              for (; itEvent != end; ++itEvent) {
432              pNextEvent = pEvents->next();                  switch (itEvent->Type) {
433              switch (pEvent->Type) {                      case Event::type_note_on:
434                  case Event::type_note_on:                          dmsg(5,("Engine: Note on received\n"));
435                      dmsg(5,("Audio Thread: Note on received\n"));                          ProcessNoteOn(itEvent);
436                      ProcessNoteOn(pEvent);                          break;
437                      break;                      case Event::type_note_off:
438                  case Event::type_note_off:                          dmsg(5,("Engine: Note off received\n"));
439                      dmsg(5,("Audio Thread: Note off received\n"));                          ProcessNoteOff(itEvent);
440                      ProcessNoteOff(pEvent);                          break;
441                      break;                      case Event::type_control_change:
442                  case Event::type_control_change:                          dmsg(5,("Engine: MIDI CC received\n"));
443                      dmsg(5,("Audio Thread: MIDI CC received\n"));                          ProcessControlChange(itEvent);
444                      ProcessControlChange(pEvent);                          break;
445                      break;                      case Event::type_pitchbend:
446                  case Event::type_pitchbend:                          dmsg(5,("Engine: Pitchbend received\n"));
447                      dmsg(5,("Audio Thread: Pitchbend received\n"));                          ProcessPitchbend(itEvent);
448                      ProcessPitchbend(pEvent);                          break;
449                      break;                      case Event::type_sysex:
450                            dmsg(5,("Engine: Sysex received\n"));
451                            ProcessSysex(itEvent);
452                            break;
453                    }
454              }              }
455          }          }
456    
457    
         // render audio from all active voices  
458          int active_voices = 0;          int active_voices = 0;
459          uint* piKey = pActiveKeys->first();  
460          while (piKey) { // iterate through all active keys          // render audio from all active voices
461              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];          {
462              pActiveKeys->set_current(piKey);              RTList<uint>::Iterator iuiKey = pActiveKeys->first();
463              piKey = pActiveKeys->next();              RTList<uint>::Iterator end    = pActiveKeys->end();
464                while (iuiKey != end) { // iterate through all active keys
465              Voice* pVoiceNext = pKey->pActiveVoices->first();                  midi_key_info_t* pKey = &pMIDIKeyInfo[*iuiKey];
466              while (pVoiceNext) { // iterate through all voices on this key                  ++iuiKey;
467                  // already get next voice on key  
468                  Voice* pVoice = pVoiceNext;                  RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();
469                  pKey->pActiveVoices->set_current(pVoice);                  RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();
470                  pVoiceNext = pKey->pActiveVoices->next();                  for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key
471                        // now render current voice
472                  // now render current voice                      itVoice->Render(Samples);
473                  pVoice->Render(Samples);                      if (itVoice->IsActive()) active_voices++; // still active
474                  if (pVoice->IsActive()) active_voices++; // still active                      else { // voice reached end, is now inactive
475                  else { // voice reached end, is now inactive                          FreeVoice(itVoice); // remove voice from the list of active voices
476                      KillVoice(pVoice); // remove voice from the list of active voices                      }
477                    }
478                }
479            }
480    
481    
482            // now render all postponed voices from voice stealing
483            {
484                RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();
485                RTList<Event>::Iterator end               = pVoiceStealingQueue->end();
486                for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {
487                    Pool<Voice>::Iterator itNewVoice = LaunchVoice(itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false);
488                    if (itNewVoice) {
489                        for (; itNewVoice; itNewVoice = itNewVoice->itChildVoice) {
490                            itNewVoice->Render(Samples);
491                            if (itNewVoice->IsActive()) active_voices++; // still active
492                            else { // voice reached end, is now inactive
493                                FreeVoice(itNewVoice); // remove voice from the list of active voices
494                            }
495                        }
496                  }                  }
497                    else dmsg(1,("Ouch, voice stealing didn't work out!\n"));
498              }              }
             pKey->pEvents->clear(); // free all events on the key  
499          }          }
500            // reset voice stealing for the new fragment
501            pVoiceStealingQueue->clear();
502            itLastStolenVoice = RTList<Voice>::Iterator();
503            iuiLastStolenKey  = RTList<uint>::Iterator();
504    
505    
506          // write that to the disk thread class so that it can print it          // write that to the disk thread class so that it can print it
# Line 422  namespace LinuxSampler { namespace gig { Line 520  namespace LinuxSampler { namespace gig {
520       *  @param Velocity - MIDI velocity value of the triggered key       *  @param Velocity - MIDI velocity value of the triggered key
521       */       */
522      void Engine::SendNoteOn(uint8_t Key, uint8_t Velocity) {      void Engine::SendNoteOn(uint8_t Key, uint8_t Velocity) {
523          Event event    = pEventGenerator->CreateEvent();          Event event               = pEventGenerator->CreateEvent();
524          event.Type     = Event::type_note_on;          event.Type                = Event::type_note_on;
525          event.Key      = Key;          event.Param.Note.Key      = Key;
526          event.Velocity = Velocity;          event.Param.Note.Velocity = Velocity;
527          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
528          else dmsg(1,("Engine: Input event queue full!"));          else dmsg(1,("Engine: Input event queue full!"));
529      }      }
# Line 438  namespace LinuxSampler { namespace gig { Line 536  namespace LinuxSampler { namespace gig {
536       *  @param Velocity - MIDI release velocity value of the released key       *  @param Velocity - MIDI release velocity value of the released key
537       */       */
538      void Engine::SendNoteOff(uint8_t Key, uint8_t Velocity) {      void Engine::SendNoteOff(uint8_t Key, uint8_t Velocity) {
539          Event event    = pEventGenerator->CreateEvent();          Event event               = pEventGenerator->CreateEvent();
540          event.Type     = Event::type_note_off;          event.Type                = Event::type_note_off;
541          event.Key      = Key;          event.Param.Note.Key      = Key;
542          event.Velocity = Velocity;          event.Param.Note.Velocity = Velocity;
543          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
544          else dmsg(1,("Engine: Input event queue full!"));          else dmsg(1,("Engine: Input event queue full!"));
545      }      }
# Line 453  namespace LinuxSampler { namespace gig { Line 551  namespace LinuxSampler { namespace gig {
551       *  @param Pitch - MIDI pitch value (-8192 ... +8191)       *  @param Pitch - MIDI pitch value (-8192 ... +8191)
552       */       */
553      void Engine::SendPitchbend(int Pitch) {      void Engine::SendPitchbend(int Pitch) {
554          Event event = pEventGenerator->CreateEvent();          Event event             = pEventGenerator->CreateEvent();
555          event.Type  = Event::type_pitchbend;          event.Type              = Event::type_pitchbend;
556          event.Pitch = Pitch;          event.Param.Pitch.Pitch = Pitch;
557          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
558          else dmsg(1,("Engine: Input event queue full!"));          else dmsg(1,("Engine: Input event queue full!"));
559      }      }
# Line 468  namespace LinuxSampler { namespace gig { Line 566  namespace LinuxSampler { namespace gig {
566       *  @param Value      - value of the control change       *  @param Value      - value of the control change
567       */       */
568      void Engine::SendControlChange(uint8_t Controller, uint8_t Value) {      void Engine::SendControlChange(uint8_t Controller, uint8_t Value) {
569          Event event      = pEventGenerator->CreateEvent();          Event event               = pEventGenerator->CreateEvent();
570          event.Type       = Event::type_control_change;          event.Type                = Event::type_control_change;
571          event.Controller = Controller;          event.Param.CC.Controller = Controller;
572          event.Value      = Value;          event.Param.CC.Value      = Value;
573          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);          if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);
574          else dmsg(1,("Engine: Input event queue full!"));          else dmsg(1,("Engine: Input event queue full!"));
575      }      }
576    
577      /**      /**
578         *  Will be called by the MIDI input device whenever a MIDI system
579         *  exclusive message has arrived.
580         *
581         *  @param pData - pointer to sysex data
582         *  @param Size  - lenght of sysex data (in bytes)
583         */
584        void Engine::SendSysex(void* pData, uint Size) {
585            Event event             = pEventGenerator->CreateEvent();
586            event.Type              = Event::type_sysex;
587            event.Param.Sysex.Size  = Size;
588            if (pEventQueue->write_space() > 0) {
589                if (pSysexBuffer->write_space() >= Size) {
590                    // copy sysex data to input buffer
591                    uint toWrite = Size;
592                    uint8_t* pPos = (uint8_t*) pData;
593                    while (toWrite) {
594                        const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end());
595                        pSysexBuffer->write(pPos, writeNow);
596                        toWrite -= writeNow;
597                        pPos    += writeNow;
598    
599                    }
600                    // finally place sysex event into input event queue
601                    pEventQueue->push(&event);
602                }
603                else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,SYSEX_BUFFER_SIZE));
604            }
605            else dmsg(1,("Engine: Input event queue full!"));
606        }
607    
608        /**
609       *  Assigns and triggers a new voice for the respective MIDI key.       *  Assigns and triggers a new voice for the respective MIDI key.
610       *       *
611       *  @param pNoteOnEvent - key, velocity and time stamp of the event       *  @param itNoteOnEvent - key, velocity and time stamp of the event
612       */       */
613      void Engine::ProcessNoteOn(Event* pNoteOnEvent) {      void Engine::ProcessNoteOn(Pool<Event>::Iterator& itNoteOnEvent) {
614          midi_key_info_t* pKey = &pMIDIKeyInfo[pNoteOnEvent->Key];          midi_key_info_t* pKey = &pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
615    
616          pKey->KeyPressed = true; // the MIDI key was now pressed down          pKey->KeyPressed = true; // the MIDI key was now pressed down
617    
618          // cancel release process of voices on this key if needed          // cancel release process of voices on this key if needed
619          if (pKey->Active && !SustainPedal) {          if (pKey->Active && !SustainPedal) {
620              pNoteOnEvent->Type = Event::type_cancel_release; // transform event type              RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();
621              pEvents->move(pNoteOnEvent, pKey->pEvents); // move event to the key's own event list              if (itCancelReleaseEvent) {
622          }                  *itCancelReleaseEvent = *itNoteOnEvent;                  // copy event
623                    itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type
         // allocate a new voice for the key  
         Voice* pNewVoice = pKey->pActiveVoices->alloc();  
         if (pNewVoice) {  
             // launch the new voice  
             if (pNewVoice->Trigger(pNoteOnEvent, this->Pitch, this->pInstrument) < 0) {  
                 dmsg(1,("Triggering new voice failed!\n"));  
                 pKey->pActiveVoices->free(pNewVoice);  
             }  
             else if (!pKey->Active) { // mark as active key  
                 pKey->Active = true;  
                 pKey->pSelf  = pActiveKeys->alloc();  
                 *pKey->pSelf = pNoteOnEvent->Key;  
624              }              }
625                else dmsg(1,("Event pool emtpy!\n"));
626          }          }
627          else std::cerr << "No free voice!" << std::endl << std::flush;  
628            // move note on event to the key's own event list
629            RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);
630    
631            // allocate and trigger a new voice for the key
632            LaunchVoice(itNoteOnEventOnKeyList);
633      }      }
634    
635      /**      /**
# Line 515  namespace LinuxSampler { namespace gig { Line 638  namespace LinuxSampler { namespace gig {
638       *  sustain pedal will be released or voice turned inactive by itself (e.g.       *  sustain pedal will be released or voice turned inactive by itself (e.g.
639       *  due to completion of sample playback).       *  due to completion of sample playback).
640       *       *
641       *  @param pNoteOffEvent - key, velocity and time stamp of the event       *  @param itNoteOffEvent - key, velocity and time stamp of the event
642       */       */
643      void Engine::ProcessNoteOff(Event* pNoteOffEvent) {      void Engine::ProcessNoteOff(Pool<Event>::Iterator& itNoteOffEvent) {
644          midi_key_info_t* pKey = &pMIDIKeyInfo[pNoteOffEvent->Key];          midi_key_info_t* pKey = &pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
645    
646          pKey->KeyPressed = false; // the MIDI key was now released          pKey->KeyPressed = false; // the MIDI key was now released
647    
648          // release voices on this key if needed          // release voices on this key if needed
649          if (pKey->Active && !SustainPedal) {          if (pKey->Active && !SustainPedal) {
650              pNoteOffEvent->Type = Event::type_release; // transform event type              itNoteOffEvent->Type = Event::type_release; // transform event type
651              pEvents->move(pNoteOffEvent, pKey->pEvents); // move event to the key's own event list          }
652    
653            // move event to the key's own event list
654            RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);
655    
656            // spawn release triggered voice(s) if needed
657            if (pKey->ReleaseTrigger) {
658                LaunchVoice(itNoteOffEventOnKeyList, 0, true);
659                pKey->ReleaseTrigger = false;
660          }          }
661      }      }
662    
# Line 533  namespace LinuxSampler { namespace gig { Line 664  namespace LinuxSampler { namespace gig {
664       *  Moves pitchbend event from the general (input) event list to the pitch       *  Moves pitchbend event from the general (input) event list to the pitch
665       *  event list.       *  event list.
666       *       *
667       *  @param pPitchbendEvent - absolute pitch value and time stamp of the event       *  @param itPitchbendEvent - absolute pitch value and time stamp of the event
668         */
669        void Engine::ProcessPitchbend(Pool<Event>::Iterator& itPitchbendEvent) {
670            this->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value
671            itPitchbendEvent.moveToEndOf(pSynthesisEvents[Event::destination_vco]);
672        }
673    
674        /**
675         *  Allocates and triggers a new voice. This method will usually be
676         *  called by the ProcessNoteOn() method and by the voices itself
677         *  (e.g. to spawn further voices on the same key for layered sounds).
678         *
679         *  @param itNoteOnEvent       - key, velocity and time stamp of the event
680         *  @param iLayer              - layer index for the new voice (optional - only
681         *                               in case of layered sounds of course)
682         *  @param ReleaseTriggerVoice - if new voice is a release triggered voice
683         *                               (optional, default = false)
684         *  @param VoiceStealing       - if voice stealing should be performed
685         *                               when there is no free voice
686         *                               (optional, default = true)
687         *  @returns pointer to new voice or NULL if there was no free voice or
688         *           if an error occured while trying to trigger the new voice
689         */
690        Pool<Voice>::Iterator Engine::LaunchVoice(Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing) {
691            midi_key_info_t* pKey = &pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
692    
693            // allocate a new voice for the key
694            Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
695            if (itNewVoice) {
696                // launch the new voice
697                if (itNewVoice->Trigger(itNoteOnEvent, this->Pitch, this->pInstrument, iLayer, ReleaseTriggerVoice) < 0) {
698                    dmsg(1,("Triggering new voice failed!\n"));
699                    pKey->pActiveVoices->free(itNewVoice);
700                }
701                else { // on success
702                    uint** ppKeyGroup = NULL;
703                    if (itNewVoice->KeyGroup) { // if this voice / key belongs to a key group
704                        ppKeyGroup = &ActiveKeyGroups[itNewVoice->KeyGroup];
705                        if (*ppKeyGroup) { // if there's already an active key in that key group
706                            midi_key_info_t* pOtherKey = &pMIDIKeyInfo[**ppKeyGroup];
707                            // kill all voices on the (other) key
708                            RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
709                            RTList<Voice>::Iterator end               = pOtherKey->pActiveVoices->end();
710                            for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
711                                if (itVoiceToBeKilled->Type != Voice::type_release_trigger) itVoiceToBeKilled->Kill(itNoteOnEvent);
712                            }
713                        }
714                    }
715                    if (!pKey->Active) { // mark as active key
716                        pKey->Active = true;
717                        pKey->itSelf = pActiveKeys->allocAppend();
718                        *pKey->itSelf = itNoteOnEvent->Param.Note.Key;
719                    }
720                    if (itNewVoice->KeyGroup) {
721                        *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group
722                    }
723                    if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)
724                    return itNewVoice; // success
725                }
726            }
727            else if (VoiceStealing) {
728                // first, get total amount of required voices (dependant on amount of layers)
729                ::gig::Region* pRegion = pInstrument->GetRegion(itNoteOnEvent->Param.Note.Key);
730                if (!pRegion) return Pool<Voice>::Iterator(); // nothing defined for this MIDI key, so no voice needed
731                int voicesRequired = pRegion->Layers;
732    
733                // now steal the (remaining) amount of voices
734                for (int i = iLayer; i < voicesRequired; i++)
735                    StealVoice(itNoteOnEvent);
736    
737                // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died
738                RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();
739                if (itStealEvent) {
740                    *itStealEvent = *itNoteOnEvent; // copy event
741                    itStealEvent->Param.Note.Layer = iLayer;
742                    itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;
743                }
744                else dmsg(1,("Voice stealing queue full!\n"));
745            }
746    
747            return Pool<Voice>::Iterator(); // no free voice or error
748        }
749    
750        /**
751         *  Will be called by LaunchVoice() method in case there are no free
752         *  voices left. This method will select and kill one old voice for
753         *  voice stealing and postpone the note-on event until the selected
754         *  voice actually died.
755         *
756         *  @param itNoteOnEvent - key, velocity and time stamp of the event
757       */       */
758      void Engine::ProcessPitchbend(Event* pPitchbendEvent) {      void Engine::StealVoice(Pool<Event>::Iterator& itNoteOnEvent) {
759          this->Pitch = pPitchbendEvent->Pitch; // store current pitch value          if (!pEventPool->poolIsEmpty()) {
760          pEvents->move(pPitchbendEvent, pSynthesisEvents[Event::destination_vco]);  
761                RTList<uint>::Iterator  iuiOldestKey;
762                RTList<Voice>::Iterator itOldestVoice;
763    
764                // Select one voice for voice stealing
765                switch (VOICE_STEAL_ALGORITHM) {
766    
767                    // try to pick the oldest voice on the key where the new
768                    // voice should be spawned, if there is no voice on that
769                    // key, or no voice left to kill there, then procceed with
770                    // 'oldestkey' algorithm
771                    case voice_steal_algo_keymask: {
772                        midi_key_info_t* pOldestKey = &pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];
773                        if (itLastStolenVoice) {
774                            itOldestVoice = itLastStolenVoice;
775                            ++itOldestVoice;
776                        }
777                        else { // no voice stolen in this audio fragment cycle yet
778                            itOldestVoice = pOldestKey->pActiveVoices->first();
779                        }
780                        if (itOldestVoice) {
781                            iuiOldestKey = pOldestKey->itSelf;
782                            break; // selection succeeded
783                        }
784                    } // no break - intentional !
785    
786                    // try to pick the oldest voice on the oldest active key
787                    // (caution: must stay after 'keymask' algorithm !)
788                    case voice_steal_algo_oldestkey: {
789                        if (itLastStolenVoice) {
790                            midi_key_info_t* pOldestKey = &pMIDIKeyInfo[*iuiLastStolenKey];
791                            itOldestVoice = itLastStolenVoice;
792                            ++itOldestVoice;
793                            if (!itOldestVoice) {
794                                iuiOldestKey = iuiLastStolenKey;
795                                ++iuiOldestKey;
796                                if (iuiOldestKey) {
797                                    midi_key_info_t* pOldestKey = &pMIDIKeyInfo[*iuiOldestKey];
798                                    itOldestVoice = pOldestKey->pActiveVoices->first();
799                                }
800                                else {
801                                    dmsg(1,("gig::Engine: Warning, too less voices, even for voice stealing! - Better recompile with higher MAX_AUDIO_VOICES.\n"));
802                                    return;
803                                }
804                            }
805                            else iuiOldestKey = iuiLastStolenKey;
806                        }
807                        else { // no voice stolen in this audio fragment cycle yet
808                            iuiOldestKey = pActiveKeys->first();
809                            midi_key_info_t* pOldestKey = &pMIDIKeyInfo[*iuiOldestKey];
810                            itOldestVoice = pOldestKey->pActiveVoices->first();
811                        }
812                        break;
813                    }
814    
815                    // don't steal anything
816                    case voice_steal_algo_none:
817                    default: {
818                        dmsg(1,("No free voice (voice stealing disabled)!\n"));
819                        return;
820                    }
821                }
822    
823                // now kill the selected voice
824                itOldestVoice->Kill(itNoteOnEvent);
825                // remember which voice on which key we stole, so we can simply proceed for the next voice stealing
826                this->itLastStolenVoice = itOldestVoice;
827                this->iuiLastStolenKey = iuiOldestKey;
828            }
829            else dmsg(1,("Event pool emtpy!\n"));
830      }      }
831    
832      /**      /**
833       *  Immediately kills the voice given with pVoice (no matter if sustain is       *  Removes the given voice from the MIDI key's list of active voices.
834       *  pressed or not) and removes it from the MIDI key's list of active voice.       *  This method will be called when a voice went inactive, e.g. because
835       *  This method will e.g. be called if a voice went inactive by itself.       *  it finished to playback its sample, finished its release stage or
836         *  just was killed.
837       *       *
838       *  @param pVoice - points to the voice to be killed       *  @param itVoice - points to the voice to be freed
839       */       */
840      void Engine::KillVoice(Voice* pVoice) {      void Engine::FreeVoice(Pool<Voice>::Iterator& itVoice) {
841          if (pVoice) {          if (itVoice) {
842              if (pVoice->IsActive()) pVoice->Kill();              midi_key_info_t* pKey = &pMIDIKeyInfo[itVoice->MIDIKey];
843    
844              midi_key_info_t* pKey = &pMIDIKeyInfo[pVoice->MIDIKey];              uint keygroup = itVoice->KeyGroup;
845    
846              // free the voice object              // free the voice object
847              pVoicePool->free(pVoice);              pVoicePool->free(itVoice);
848    
849              // check if there are no voices left on the MIDI key and update the key info if so              // check if there are no voices left on the MIDI key and update the key info if so
850              if (pKey->pActiveVoices->is_empty()) {              if (pKey->pActiveVoices->isEmpty()) {
851                    if (keygroup) { // if voice / key belongs to a key group
852                        uint** ppKeyGroup = &ActiveKeyGroups[keygroup];
853                        if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group
854                    }
855                  pKey->Active = false;                  pKey->Active = false;
856                  pActiveKeys->free(pKey->pSelf); // remove key from list of active keys                  pActiveKeys->free(pKey->itSelf); // remove key from list of active keys
857                  pKey->pSelf = NULL;                  pKey->itSelf = RTList<uint>::Iterator();
858                    pKey->ReleaseTrigger = false;
859                    pKey->pEvents->clear();
860                  dmsg(3,("Key has no more voices now\n"));                  dmsg(3,("Key has no more voices now\n"));
861              }              }
862          }          }
863          else std::cerr << "Couldn't release voice! (pVoice == NULL)\n" << std::flush;          else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;
864      }      }
865    
866      /**      /**
867       *  Reacts on supported control change commands (e.g. pitch bend wheel,       *  Reacts on supported control change commands (e.g. pitch bend wheel,
868       *  modulation wheel, aftertouch).       *  modulation wheel, aftertouch).
869       *       *
870       *  @param pControlChangeEvent - controller, value and time stamp of the event       *  @param itControlChangeEvent - controller, value and time stamp of the event
871       */       */
872      void Engine::ProcessControlChange(Event* pControlChangeEvent) {      void Engine::ProcessControlChange(Pool<Event>::Iterator& itControlChangeEvent) {
873          dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", pControlChangeEvent->Controller, pControlChangeEvent->Value));          dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
874    
875          switch (pControlChangeEvent->Controller) {          switch (itControlChangeEvent->Param.CC.Controller) {
876              case 64: {              case 64: {
877                  if (pControlChangeEvent->Value >= 64 && !SustainPedal) {                  if (itControlChangeEvent->Param.CC.Value >= 64 && !SustainPedal) {
878                      dmsg(4,("PEDAL DOWN\n"));                      dmsg(4,("PEDAL DOWN\n"));
879                      SustainPedal = true;                      SustainPedal = true;
880    
881                      // cancel release process of voices if necessary                      // cancel release process of voices if necessary
882                      uint* piKey = pActiveKeys->first();                      RTList<uint>::Iterator iuiKey = pActiveKeys->first();
883                      if (piKey) {                      if (iuiKey) {
884                          pControlChangeEvent->Type = Event::type_cancel_release; // transform event type                          itControlChangeEvent->Type = Event::type_cancel_release; // transform event type
885                          while (piKey) {                          while (iuiKey) {
886                              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];                              midi_key_info_t* pKey = &pMIDIKeyInfo[*iuiKey];
887                              pActiveKeys->set_current(piKey);                              ++iuiKey;
                             piKey = pActiveKeys->next();  
888                              if (!pKey->KeyPressed) {                              if (!pKey->KeyPressed) {
889                                  Event* pNewEvent = pKey->pEvents->alloc();                                  RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
890                                  if (pNewEvent) *pNewEvent = *pControlChangeEvent; // copy event to the key's own event list                                  if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
891                                  else dmsg(1,("Event pool emtpy!\n"));                                  else dmsg(1,("Event pool emtpy!\n"));
892                              }                              }
893                          }                          }
894                      }                      }
895                  }                  }
896                  if (pControlChangeEvent->Value < 64 && SustainPedal) {                  if (itControlChangeEvent->Param.CC.Value < 64 && SustainPedal) {
897                      dmsg(4,("PEDAL UP\n"));                      dmsg(4,("PEDAL UP\n"));
898                      SustainPedal = false;                      SustainPedal = false;
899    
900                      // release voices if their respective key is not pressed                      // release voices if their respective key is not pressed
901                      uint* piKey = pActiveKeys->first();                      RTList<uint>::Iterator iuiKey = pActiveKeys->first();
902                      if (piKey) {                      if (iuiKey) {
903                          pControlChangeEvent->Type = Event::type_release; // transform event type                          itControlChangeEvent->Type = Event::type_release; // transform event type
904                          while (piKey) {                          while (iuiKey) {
905                              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];                              midi_key_info_t* pKey = &pMIDIKeyInfo[*iuiKey];
906                              pActiveKeys->set_current(piKey);                              ++iuiKey;
                             piKey = pActiveKeys->next();  
907                              if (!pKey->KeyPressed) {                              if (!pKey->KeyPressed) {
908                                  Event* pNewEvent = pKey->pEvents->alloc();                                  RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();
909                                  if (pNewEvent) *pNewEvent = *pControlChangeEvent; // copy event to the key's own event list                                  if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list
910                                  else dmsg(1,("Event pool emtpy!\n"));                                  else dmsg(1,("Event pool emtpy!\n"));
911                              }                              }
912                          }                          }
# Line 623  namespace LinuxSampler { namespace gig { Line 917  namespace LinuxSampler { namespace gig {
917          }          }
918    
919          // update controller value in the engine's controller table          // update controller value in the engine's controller table
920          ControllerTable[pControlChangeEvent->Controller] = pControlChangeEvent->Value;          ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
921    
922          // move event from the unsorted event list to the control change event list          // move event from the unsorted event list to the control change event list
923          pEvents->move(pControlChangeEvent, pCCEvents);          itControlChangeEvent.moveToEndOf(pCCEvents);
924        }
925    
926        /**
927         *  Reacts on MIDI system exclusive messages.
928         *
929         *  @param itSysexEvent - sysex data size and time stamp of the sysex event
930         */
931        void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {
932            RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader();
933    
934            uint8_t exclusive_status, id;
935            if (!reader.pop(&exclusive_status)) goto free_sysex_data;
936            if (!reader.pop(&id))               goto free_sysex_data;
937            if (exclusive_status != 0xF0)       goto free_sysex_data;
938    
939            switch (id) {
940                case 0x41: { // Roland
941                    uint8_t device_id, model_id, cmd_id;
942                    if (!reader.pop(&device_id)) goto free_sysex_data;
943                    if (!reader.pop(&model_id))  goto free_sysex_data;
944                    if (!reader.pop(&cmd_id))    goto free_sysex_data;
945                    if (model_id != 0x42 /*GS*/) goto free_sysex_data;
946                    if (cmd_id != 0x12 /*DT1*/)  goto free_sysex_data;
947    
948                    // command address
949                    uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB)
950                    const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later
951                    if (reader.read(&addr[0], 3) != 3) goto free_sysex_data;
952                    if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters
953                    }
954                    else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters
955                    }
956                    else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)
957                        switch (addr[3]) {
958                            case 0x40: { // scale tuning
959                                uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave
960                                if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data;
961                                uint8_t checksum;
962                                if (!reader.pop(&checksum))                      goto free_sysex_data;
963                                if (GSCheckSum(checksum_reader, 12) != checksum) goto free_sysex_data;
964                                for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;
965                                AdjustScale((int8_t*) scale_tunes);
966                                break;
967                            }
968                        }
969                    }
970                    else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)
971                    }
972                    else if (addr[0] == 0x41) { // Drum Setup Parameters
973                    }
974                    break;
975                }
976            }
977    
978            free_sysex_data: // finally free sysex data
979            pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);
980        }
981    
982        /**
983         * Calculates the Roland GS sysex check sum.
984         *
985         * @param AddrReader - reader which currently points to the first GS
986         *                     command address byte of the GS sysex message in
987         *                     question
988         * @param DataSize   - size of the GS message data (in bytes)
989         */
990        uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) {
991            RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader;
992            uint bytes = 3 /*addr*/ + DataSize;
993            uint8_t addr_and_data[bytes];
994            reader.read(&addr_and_data[0], bytes);
995            uint8_t sum = 0;
996            for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];
997            return 128 - sum % 128;
998        }
999    
1000        /**
1001         * Allows to tune each of the twelve semitones of an octave.
1002         *
1003         * @param ScaleTunes - detuning of all twelve semitones (in cents)
1004         */
1005        void Engine::AdjustScale(int8_t ScaleTunes[12]) {
1006            memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate
1007      }      }
1008    
1009      /**      /**
# Line 635  namespace LinuxSampler { namespace gig { Line 1012  namespace LinuxSampler { namespace gig {
1012       */       */
1013      void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) {      void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) {
1014          int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle();          int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle();
1015          for (int i = 0; i < maxsamples; i++) pSynthesisParameters[dst][i] = val;          float* m = &pSynthesisParameters[dst][0];
1016            for (int i = 0; i < maxsamples; i += 4) {
1017               m[i]   = val;
1018               m[i+1] = val;
1019               m[i+2] = val;
1020               m[i+3] = val;
1021            }
1022      }      }
1023    
1024      float Engine::Volume() {      float Engine::Volume() {
# Line 646  namespace LinuxSampler { namespace gig { Line 1029  namespace LinuxSampler { namespace gig {
1029          GlobalVolume = f;          GlobalVolume = f;
1030      }      }
1031    
1032        uint Engine::Channels() {
1033            return 2;
1034        }
1035    
1036        void Engine::SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel) {
1037            AudioChannel* pChannel = pAudioOutputDevice->Channel(AudioDeviceChannel);
1038            if (!pChannel) throw AudioOutputException("Invalid audio output device channel " + ToString(AudioDeviceChannel));
1039            switch (EngineAudioChannel) {
1040                case 0: // left output channel
1041                    pOutputLeft = pChannel->Buffer();
1042                    AudioDeviceChannelLeft = AudioDeviceChannel;
1043                    break;
1044                case 1: // right output channel
1045                    pOutputRight = pChannel->Buffer();
1046                    AudioDeviceChannelRight = AudioDeviceChannel;
1047                    break;
1048                default:
1049                    throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));
1050            }
1051        }
1052    
1053        int Engine::OutputChannel(uint EngineAudioChannel) {
1054            switch (EngineAudioChannel) {
1055                case 0: // left channel
1056                    return AudioDeviceChannelLeft;
1057                case 1: // right channel
1058                    return AudioDeviceChannelRight;
1059                default:
1060                    throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));
1061            }
1062        }
1063    
1064      uint Engine::VoiceCount() {      uint Engine::VoiceCount() {
1065          return ActiveVoiceCount;          return ActiveVoiceCount;
1066      }      }
# Line 674  namespace LinuxSampler { namespace gig { Line 1089  namespace LinuxSampler { namespace gig {
1089          return pDiskThread->GetBufferFillPercentage();          return pDiskThread->GetBufferFillPercentage();
1090      }      }
1091    
1092        String Engine::EngineName() {
1093            return "GigEngine";
1094        }
1095    
1096        String Engine::InstrumentFileName() {
1097            return InstrumentFile;
1098        }
1099    
1100        int Engine::InstrumentIndex() {
1101            return InstrumentIdx;
1102        }
1103    
1104        int Engine::InstrumentStatus() {
1105            return InstrumentStat;
1106        }
1107    
1108      String Engine::Description() {      String Engine::Description() {
1109          return "Gigasampler Engine";          return "Gigasampler Engine";
1110      }      }
1111    
1112      String Engine::Version() {      String Engine::Version() {
1113          return "0.0.1-0cvs20040423";          String s = "$Revision: 1.16 $";
1114            return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
1115      }      }
1116    
1117  }} // namespace LinuxSampler::gig  }} // namespace LinuxSampler::gig
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