/[svn]/linuxsampler/trunk/src/engines/gig/Engine.cpp
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revision 411 by schoenebeck, Sat Feb 26 02:01:14 2005 UTC revision 2611 by schoenebeck, Mon Jun 9 19:20:37 2014 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *   *   Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck    *
6   *   Copyright (C) 2005 Christian Schoenebeck                              *   *   Copyright (C) 2005-2008 Christian Schoenebeck                         *
7     *   Copyright (C) 2009-2010 Christian Schoenebeck and Grigor Iliev        *
8   *                                                                         *   *                                                                         *
9   *   This program is free software; you can redistribute it and/or modify  *   *   This program is free software; you can redistribute it and/or modify  *
10   *   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 21  Line 22 
22   *   MA  02111-1307  USA                                                   *   *   MA  02111-1307  USA                                                   *
23   ***************************************************************************/   ***************************************************************************/
24    
 #include <sstream>  
 #include "DiskThread.h"  
 #include "Voice.h"  
 #include "EGADSR.h"  
   
25  #include "Engine.h"  #include "Engine.h"
26    #include "EngineChannel.h"
27  #if defined(__APPLE__)  #include "InstrumentScriptVM.h"
 # include <stdlib.h>  
 #else  
 # include <malloc.h>  
 #endif  
28    
29  namespace LinuxSampler { namespace gig {  namespace LinuxSampler { namespace gig {
30        Engine::Format Engine::GetEngineFormat() { return GIG; }
31    
32      InstrumentResourceManager Engine::instruments;      void Engine::CreateInstrumentScriptVM() {
33            dmsg(2,("gig::Engine created Giga format scriptvm\n"));
34      std::map<AudioOutputDevice*,Engine*> Engine::engines;          if (pScriptVM) return;
35            pScriptVM = new InstrumentScriptVM; // gig format specific extended script runner
     Engine* Engine::AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {  
         Engine* pEngine;  
         if (engines.count(pDevice)) {  
             pEngine = engines[pDevice];  
         } else {  
             pEngine = new Engine;  
             pEngine->Connect(pDevice);  
         }  
         pEngine->samplerChannels.push_back(pChannel);  
         return pEngine;  
     }  
   
     void Engine::FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {  
         Engine* pEngine = engines[pDevice];  
         pEngine->samplerChannels.remove(pChannel);  
         if (pEngine->samplerChannels.empty()) delete pEngine;  
     }  
   
     Engine::Engine() {  
         pAudioOutputDevice = NULL;  
         pDiskThread        = NULL;  
         pEventGenerator    = NULL;  
         pSysexBuffer       = new RingBuffer<uint8_t>(SYSEX_BUFFER_SIZE, 0);  
         pEventQueue        = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT, 0);  
         pEventPool         = new Pool<Event>(MAX_EVENTS_PER_FRAGMENT);  
         pVoicePool         = new Pool<Voice>(MAX_AUDIO_VOICES);          
         pVoiceStealingQueue = new RTList<Event>(pEventPool);  
         pEvents            = new RTList<Event>(pEventPool);  
         pCCEvents          = new RTList<Event>(pEventPool);  
           
         for (uint i = 0; i < Event::destination_count; i++) {  
             pSynthesisEvents[i] = new RTList<Event>(pEventPool);  
         }  
         for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {  
             iterVoice->SetEngine(this);  
         }  
         pVoicePool->clear();  
   
         pSynthesisParameters[0] = NULL; // we allocate when an audio device is connected  
         pBasicFilterParameters  = NULL;  
         pMainFilterParameters   = NULL;  
   
         ResetInternal();  
     }  
   
     Engine::~Engine() {  
         if (pDiskThread) {  
             dmsg(1,("Stopping disk thread..."));  
             pDiskThread->StopThread();  
             delete pDiskThread;  
             dmsg(1,("OK\n"));  
         }  
         for (uint i = 0; i < Event::destination_count; i++) {  
             if (pSynthesisEvents[i]) delete pSynthesisEvents[i];  
         }  
         if (pEvents)     delete pEvents;  
         if (pCCEvents)   delete pCCEvents;  
         if (pEventQueue) delete pEventQueue;  
         if (pEventPool)  delete pEventPool;  
         if (pVoicePool) {  
             pVoicePool->clear();  
             delete pVoicePool;  
         }  
         if (pEventGenerator) delete pEventGenerator;  
         if (pMainFilterParameters) delete[] pMainFilterParameters;  
         if (pBasicFilterParameters) delete[] pBasicFilterParameters;  
         if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);  
         if (pVoiceStealingQueue) delete pVoiceStealingQueue;  
         if (pSysexBuffer) delete pSysexBuffer;  
     }  
   
     void Engine::Enable() {  
         dmsg(3,("gig::Engine: enabling\n"));  
         EngineDisabled.PushAndUnlock(false, 2); // set condition object 'EngineDisabled' to false (wait max. 2s)  
         dmsg(3,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe()));  
     }  
   
     void Engine::Disable() {  
         dmsg(3,("gig::Engine: disabling\n"));  
         bool* pWasDisabled = EngineDisabled.PushAndUnlock(true, 2); // wait max. 2s  
         if (!pWasDisabled) dmsg(3,("gig::Engine warning: Timeout waiting to disable engine.\n"));  
     }  
   
     void Engine::DisableAndLock() {  
         dmsg(3,("gig::Engine: disabling\n"));  
         bool* pWasDisabled = EngineDisabled.Push(true, 2); // wait max. 2s  
         if (!pWasDisabled) dmsg(3,("gig::Engine warning: Timeout waiting to disable engine.\n"));  
36      }      }
37    
38      /**      /**
39       *  Reset all voices and disk thread and clear input event queue and all       *  Reacts on supported control change commands (e.g. pitch bend wheel,
40       *  control and status variables.       *  modulation wheel, aftertouch).
      */  
     void Engine::Reset() {  
         DisableAndLock();  
         ResetInternal();  
         Enable();  
     }  
   
     /**  
      *  Reset all voices and disk thread and clear input event queue and all  
      *  control and status variables. This method is not thread safe!  
      */  
     void Engine::ResetInternal() {  
         ActiveVoiceCount    = 0;  
         ActiveVoiceCountMax = 0;  
   
         // reset voice stealing parameters  
         itLastStolenVoice = RTList<Voice>::Iterator();  
         iuiLastStolenKey  = RTList<uint>::Iterator();  
         pVoiceStealingQueue->clear();  
   
         // reset to normal chromatic scale (means equal temper)  
         memset(&ScaleTuning[0], 0x00, 12);  
   
         // reset all voices  
         for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {  
             iterVoice->Reset();  
         }  
         pVoicePool->clear();  
   
         // reset disk thread  
         if (pDiskThread) pDiskThread->Reset();  
   
         // delete all input events  
         pEventQueue->init();  
     }  
   
     void Engine::Connect(AudioOutputDevice* pAudioOut) {  
         pAudioOutputDevice = pAudioOut;  
   
         ResetInternal();  
   
         // inform audio driver for the need of two channels  
         try {  
             pAudioOutputDevice->AcquireChannels(2); // gig engine only stereo  
         }  
         catch (AudioOutputException e) {  
             String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message();  
             throw LinuxSamplerException(msg);  
         }  
           
         this->MaxSamplesPerCycle      = pAudioOutputDevice->MaxSamplesPerCycle();  
         this->SampleRate              = pAudioOutputDevice->SampleRate();  
   
         // FIXME: audio drivers with varying fragment sizes might be a problem here  
         MaxFadeOutPos = MaxSamplesPerCycle - int(double(SampleRate) * EG_MIN_RELEASE_TIME) - 1;  
         if (MaxFadeOutPos < 0)  
             throw LinuxSamplerException("EG_MIN_RELEASE_TIME in EGADSR.h too big for current audio fragment size / sampling rate!");  
   
         // (re)create disk thread  
         if (this->pDiskThread) {  
             dmsg(1,("Stopping disk thread..."));  
             this->pDiskThread->StopThread();  
             delete this->pDiskThread;  
             dmsg(1,("OK\n"));  
         }  
         this->pDiskThread = new DiskThread(((pAudioOut->MaxSamplesPerCycle() << MAX_PITCH) << 1) + 6); //FIXME: assuming stereo  
         if (!pDiskThread) {  
             dmsg(0,("gig::Engine  new diskthread = NULL\n"));  
             exit(EXIT_FAILURE);  
         }  
   
         for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {  
             iterVoice->pDiskThread = this->pDiskThread;  
             dmsg(3,("d"));  
         }  
         pVoicePool->clear();  
   
         // (re)create event generator  
         if (pEventGenerator) delete pEventGenerator;  
         pEventGenerator = new EventGenerator(pAudioOut->SampleRate());  
   
         // (re)allocate synthesis parameter matrix  
         if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);  
   
         #if defined(__APPLE__)  
         pSynthesisParameters[0] = (float *) malloc(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle());  
         #else  
         pSynthesisParameters[0] = (float *) memalign(16,(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle()));  
         #endif  
         for (int dst = 1; dst < Event::destination_count; dst++)  
             pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();  
   
         // (re)allocate biquad filter parameter sequence  
         if (pBasicFilterParameters) delete[] pBasicFilterParameters;  
         if (pMainFilterParameters)  delete[] pMainFilterParameters;  
         pBasicFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];  
         pMainFilterParameters  = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];  
   
         dmsg(1,("Starting disk thread..."));  
         pDiskThread->StartThread();  
         dmsg(1,("OK\n"));  
   
         for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {  
             if (!iterVoice->pDiskThread) {  
                 dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));  
                 exit(EXIT_FAILURE);  
             }  
         }  
     }  
   
     /**  
      *  Let this engine proceed to render the given amount of sample points. The  
      *  calculated audio data of all voices of this engine will be placed into  
      *  the engine's audio sum buffer which has to be copied and eventually be  
      *  converted to the appropriate value range by the audio output class (e.g.  
      *  AlsaIO or JackIO) right after.  
41       *       *
42       *  @param pEngineChannel - the engine's channel to be rendered       *  @param pEngineChannel - engine channel on which this event occured on
43       *  @param Samples - number of sample points to be rendered       *  @param itControlChangeEvent - controller, value and time stamp of the event
      *  @returns       0 on success  
44       */       */
45      int Engine::RenderAudio(LinuxSampler::gig::EngineChannel* pEngineChannel, uint Samples) {      void Engine::ProcessControlChange (
46          dmsg(5,("RenderAudio(Samples=%d)\n", Samples));          LinuxSampler::EngineChannel*  pEngineChannel,
47            Pool<Event>::Iterator&        itControlChangeEvent
48          // return if no instrument loaded or engine disabled      ) {
49          if (EngineDisabled.Pop()) {          dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
             dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));  
             return 0;  
         }  
         if (!pEngineChannel->pInstrument) {  
             dmsg(5,("gig::Engine: no instrument loaded\n"));  
             return 0;  
         }  
   
   
         // update time of start and end of this audio fragment (as events' time stamps relate to this)  
         pEventGenerator->UpdateFragmentTime(Samples);  
   
   
         // empty the event lists for the new fragment  
         pEvents->clear();  
         pCCEvents->clear();  
         for (uint i = 0; i < Event::destination_count; i++) {  
             pSynthesisEvents[i]->clear();  
         }  
         {  
             RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();  
             RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();  
             for(; iuiKey != end; ++iuiKey) {  
                 pEngineChannel->pMIDIKeyInfo[*iuiKey].pEvents->clear(); // free all events on the key  
             }  
         }  
   
   
         // get all events from the input event queue which belong to the current fragment  
         {  
             RingBuffer<Event>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader();  
             Event* pEvent;  
             while (true) {  
                 // get next event from input event queue  
                 if (!(pEvent = eventQueueReader.pop())) break;  
                 // if younger event reached, ignore that and all subsequent ones for now  
                 if (pEvent->FragmentPos() >= Samples) {  
                     eventQueueReader--;  
                     dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples));  
                     pEvent->ResetFragmentPos();  
                     break;  
                 }  
                 // copy event to internal event list  
                 if (pEvents->poolIsEmpty()) {  
                     dmsg(1,("Event pool emtpy!\n"));  
                     break;  
                 }  
                 *pEvents->allocAppend() = *pEvent;  
             }  
             eventQueueReader.free(); // free all copied events from input queue  
         }  
   
   
         // process events  
         {  
             RTList<Event>::Iterator itEvent = pEvents->first();  
             RTList<Event>::Iterator end     = pEvents->end();  
             for (; itEvent != end; ++itEvent) {  
                 switch (itEvent->Type) {  
                     case Event::type_note_on:  
                         dmsg(5,("Engine: Note on received\n"));  
                         ProcessNoteOn(pEngineChannel, itEvent);  
                         break;  
                     case Event::type_note_off:  
                         dmsg(5,("Engine: Note off received\n"));  
                         ProcessNoteOff(pEngineChannel, itEvent);  
                         break;  
                     case Event::type_control_change:  
                         dmsg(5,("Engine: MIDI CC received\n"));  
                         ProcessControlChange(pEngineChannel, itEvent);  
                         break;  
                     case Event::type_pitchbend:  
                         dmsg(5,("Engine: Pitchbend received\n"));  
                         ProcessPitchbend(pEngineChannel, itEvent);  
                         break;  
                     case Event::type_sysex:  
                         dmsg(5,("Engine: Sysex received\n"));  
                         ProcessSysex(itEvent);  
                         break;  
                 }  
             }  
         }  
   
   
         int active_voices = 0;  
   
         // render audio from all active voices  
         {  
             RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();  
             RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();  
             while (iuiKey != end) { // iterate through all active keys  
                 midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];  
                 ++iuiKey;  
   
                 RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();  
                 RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();  
                 for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key  
                     // now render current voice  
                     itVoice->Render(Samples);  
                     if (itVoice->IsActive()) active_voices++; // still active  
                     else { // voice reached end, is now inactive  
                         FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices  
                     }  
                 }  
             }  
         }  
   
50    
51          // now render all postponed voices from voice stealing          EngineChannel* pChannel = dynamic_cast<EngineChannel*>(pEngineChannel);
52          {          // handle the "control triggered" MIDI rule: a control change
53              RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();          // event can trigger a new note on or note off event
54              RTList<Event>::Iterator end               = pVoiceStealingQueue->end();          if (pChannel->pInstrument) {
55              for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {  
56                  Pool<Voice>::Iterator itNewVoice =              ::gig::MidiRule* rule;
57                      LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false);              for (int i = 0 ; (rule = pChannel->pInstrument->GetMidiRule(i)) ; i++) {
58                  if (itNewVoice) {  
59                      for (; itNewVoice; itNewVoice = itNewVoice->itChildVoice) {                  if (::gig::MidiRuleCtrlTrigger* ctrlTrigger =
60                          itNewVoice->Render(Samples);                      dynamic_cast< ::gig::MidiRuleCtrlTrigger*>(rule)) {
61                          if (itNewVoice->IsActive()) active_voices++; // still active                      if (itControlChangeEvent->Param.CC.Controller ==
62                          else { // voice reached end, is now inactive                          ctrlTrigger->ControllerNumber) {
63                              FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices  
64                          }                          uint8_t oldCCValue = pChannel->ControllerTable[
65                      }                              itControlChangeEvent->Param.CC.Controller];
66                  }                          uint8_t newCCValue = itControlChangeEvent->Param.CC.Value;
67                  else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));  
68              }                          for (int i = 0 ; i < ctrlTrigger->Triggers ; i++) {
69          }                              ::gig::MidiRuleCtrlTrigger::trigger_t* pTrigger =
70          // reset voice stealing for the new fragment                                    &ctrlTrigger->pTriggers[i];
71          pVoiceStealingQueue->clear();  
72          itLastStolenVoice = RTList<Voice>::Iterator();                              // check if the controller has passed the
73          iuiLastStolenKey  = RTList<uint>::Iterator();                              // trigger point in the right direction
74                                if ((pTrigger->Descending &&
75                                     oldCCValue > pTrigger->TriggerPoint &&
76          // free all keys which have no active voices left                                   newCCValue <= pTrigger->TriggerPoint) ||
77          {                                  (!pTrigger->Descending &&
78              RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();                                   oldCCValue < pTrigger->TriggerPoint &&
79              RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();                                   newCCValue >= pTrigger->TriggerPoint)) {
80              while (iuiKey != end) { // iterate through all active keys  
81                  midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];                                  RTList<Event>::Iterator itNewEvent = pGlobalEvents->allocAppend();
82                  ++iuiKey;                                  if (itNewEvent) {
83                  if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);                                      *itNewEvent = *itControlChangeEvent;
84                  #if DEVMODE                                      itNewEvent->Param.Note.Key = pTrigger->Key;
85                  else { // FIXME: should be removed before the final release (purpose: just a sanity check for debugging)  
86                      RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();                                      if (pTrigger->NoteOff || pTrigger->Velocity == 0) {
87                      RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();                                          itNewEvent->Type = Event::type_note_off;
88                      for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key                                          itNewEvent->Param.Note.Velocity = 100;
89                          if (itVoice->itKillEvent) {  
90                              dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));                                          ProcessNoteOff(pEngineChannel, itNewEvent);
91                                        } else {
92                                            itNewEvent->Type = Event::type_note_on;
93                                            //TODO: if Velocity is 255, the triggered velocity should
94                                            // depend on how fast the controller is moving
95                                            itNewEvent->Param.Note.Velocity =
96                                                pTrigger->Velocity == 255 ? 100 :
97                                                pTrigger->Velocity;
98    
99                                            ProcessNoteOn(pEngineChannel, itNewEvent);
100                                        }
101                                    }
102                                    else dmsg(1,("Event pool emtpy!\n"));
103                                }
104                          }                          }
105                      }                      }
106                  }                  }
                 #endif // DEVMODE  
107              }              }
108          }          }
109    
110            // update controller value in the engine channel's controller table
111            pChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
112    
113          // write that to the disk thread class so that it can print it          ProcessHardcodedControllers(pEngineChannel, itControlChangeEvent);
         // on the console for debugging purposes  
         ActiveVoiceCount = active_voices;  
         if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;  
114    
115            // handle FX send controllers
116          return 0;          ProcessFxSendControllers(pChannel, itControlChangeEvent);
     }      
   
     /**  
      *  Will be called by the MIDI input device whenever a MIDI system  
      *  exclusive message has arrived.  
      *  
      *  @param pData - pointer to sysex data  
      *  @param Size  - lenght of sysex data (in bytes)  
      */  
     void Engine::SendSysex(void* pData, uint Size) {  
         Event event             = pEventGenerator->CreateEvent();  
         event.Type              = Event::type_sysex;  
         event.Param.Sysex.Size  = Size;  
         if (pEventQueue->write_space() > 0) {  
             if (pSysexBuffer->write_space() >= Size) {  
                 // copy sysex data to input buffer  
                 uint toWrite = Size;  
                 uint8_t* pPos = (uint8_t*) pData;  
                 while (toWrite) {  
                     const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end());  
                     pSysexBuffer->write(pPos, writeNow);  
                     toWrite -= writeNow;  
                     pPos    += writeNow;  
   
                 }  
                 // finally place sysex event into input event queue  
                 pEventQueue->push(&event);  
             }  
             else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,SYSEX_BUFFER_SIZE));  
         }  
         else dmsg(1,("Engine: Input event queue full!"));  
117      }      }
118    
119      /**      void Engine::ProcessChannelPressure(LinuxSampler::EngineChannel* pEngineChannel, Pool<Event>::Iterator& itChannelPressureEvent) {
120       *  Assigns and triggers a new voice for the respective MIDI key.          // if required: engine global aftertouch handling (apart from the per voice handling)
      *  
      *  @param pEngineChannel - engine channel on which this event occured on  
      *  @param itNoteOnEvent - key, velocity and time stamp of the event  
      */  
     void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {  
           
         const int key = itNoteOnEvent->Param.Note.Key;  
   
         // Change key dimension value if key is in keyswitching area  
         {  
             const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;  
             if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)  
                 pEngineChannel->CurrentKeyDimension = ((key - pInstrument->DimensionKeyRange.low) * 128) /  
                     (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);  
         }  
   
         midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];  
   
         pKey->KeyPressed = true; // the MIDI key was now pressed down  
   
         // cancel release process of voices on this key if needed  
         if (pKey->Active && !pEngineChannel->SustainPedal) {  
             RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();  
             if (itCancelReleaseEvent) {  
                 *itCancelReleaseEvent = *itNoteOnEvent;                  // copy event  
                 itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type  
             }  
             else dmsg(1,("Event pool emtpy!\n"));  
         }  
   
         // move note on event to the key's own event list  
         RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);  
   
         // allocate and trigger a new voice for the key  
         LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, 0, false, true);  
121      }      }
122    
123      /**      void Engine::ProcessPolyphonicKeyPressure(LinuxSampler::EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNotePressureEvent) {
124       *  Releases the voices on the given key if sustain pedal is not pressed.          // if required: engine global aftertouch handling (apart from the per voice handling)
      *  If sustain is pressed, the release of the note will be postponed until  
      *  sustain pedal will be released or voice turned inactive by itself (e.g.  
      *  due to completion of sample playback).  
      *  
      *  @param pEngineChannel - engine channel on which this event occured on  
      *  @param itNoteOffEvent - key, velocity and time stamp of the event  
      */  
     void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {  
         midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];  
   
         pKey->KeyPressed = false; // the MIDI key was now released  
   
         // release voices on this key if needed  
         if (pKey->Active && !pEngineChannel->SustainPedal) {  
             itNoteOffEvent->Type = Event::type_release; // transform event type  
         }  
   
         // move event to the key's own event list  
         RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);  
   
         // spawn release triggered voice(s) if needed  
         if (pKey->ReleaseTrigger) {  
             LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, 0, true, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples  
             pKey->ReleaseTrigger = false;  
         }  
125      }      }
126    
127      /**      DiskThread* Engine::CreateDiskThread() {
128       *  Moves pitchbend event from the general (input) event list to the pitch          return new DiskThread (
129       *  event list.              iMaxDiskStreams,
130       *              ((pAudioOutputDevice->MaxSamplesPerCycle() << CONFIG_MAX_PITCH) << 1) + 6, //FIXME: assuming stereo
131       *  @param pEngineChannel - engine channel on which this event occured on              &instruments
132       *  @param itPitchbendEvent - absolute pitch value and time stamp of the event          );
      */  
     void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) {  
         pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value  
         itPitchbendEvent.moveToEndOf(pSynthesisEvents[Event::destination_vco]);  
133      }      }
134    
135      /**      void Engine::TriggerNewVoices (
136       *  Allocates and triggers a new voice. This method will usually be          LinuxSampler::EngineChannel* pEngineChannel,
137       *  called by the ProcessNoteOn() method and by the voices itself          RTList<Event>::Iterator&     itNoteOnEvent,
138       *  (e.g. to spawn further voices on the same key for layered sounds).          bool                         HandleKeyGroupConflicts
139       *      ) {
140       *  @param pEngineChannel      - engine channel on which this event occured on          EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
141       *  @param itNoteOnEvent       - key, velocity and time stamp of the event          // first, get total amount of required voices (dependant on amount of layers)
142       *  @param iLayer              - layer index for the new voice (optional - only          ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(itNoteOnEvent->Param.Note.Key);
143       *                               in case of layered sounds of course)          if (pRegion && !RegionSuspended(pRegion)) {
      *  @param ReleaseTriggerVoice - if new voice is a release triggered voice  
      *                               (optional, default = false)  
      *  @param VoiceStealing       - if voice stealing should be performed  
      *                               when there is no free voice  
      *                               (optional, default = true)  
      *  @returns pointer to new voice or NULL if there was no free voice or  
      *           if the voice wasn't triggered (for example when no region is  
      *           defined for the given key).  
      */  
     Pool<Voice>::Iterator Engine::LaunchVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing) {  
         midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];  
   
         // allocate a new voice for the key  
         Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();  
         if (itNewVoice) {  
             // launch the new voice  
             if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pEngineChannel->pInstrument, iLayer, ReleaseTriggerVoice, VoiceStealing) < 0) {  
                 dmsg(4,("Voice not triggered\n"));  
                 pKey->pActiveVoices->free(itNewVoice);  
             }  
             else { // on success  
                 uint** ppKeyGroup = NULL;  
                 if (itNewVoice->KeyGroup) { // if this voice / key belongs to a key group  
                     ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];  
                     if (*ppKeyGroup) { // if there's already an active key in that key group  
                         midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[**ppKeyGroup];  
                         // kill all voices on the (other) key  
                         RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();  
                         RTList<Voice>::Iterator end               = pOtherKey->pActiveVoices->end();  
                         for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {  
                             if (itVoiceToBeKilled->Type != Voice::type_release_trigger) itVoiceToBeKilled->Kill(itNoteOnEvent);  
                         }  
                     }  
                 }  
                 if (!pKey->Active) { // mark as active key  
                     pKey->Active = true;  
                     pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();  
                     *pKey->itSelf = itNoteOnEvent->Param.Note.Key;  
                 }  
                 if (itNewVoice->KeyGroup) {  
                     *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group  
                 }  
                 if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)  
                 return itNewVoice; // success  
             }  
         }  
         else if (VoiceStealing) {  
             // first, get total amount of required voices (dependant on amount of layers)  
             ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEvent->Param.Note.Key);  
             if (!pRegion) return Pool<Voice>::Iterator(); // nothing defined for this MIDI key, so no voice needed  
144              int voicesRequired = pRegion->Layers;              int voicesRequired = pRegion->Layers;
145                // now launch the required amount of voices
146              // now steal the (remaining) amount of voices              for (int i = 0; i < voicesRequired; i++)
147              for (int i = iLayer; i < voicesRequired; i++)                  LaunchVoice(pChannel, itNoteOnEvent, i, false, true, HandleKeyGroupConflicts);
                 StealVoice(pEngineChannel, itNoteOnEvent);  
   
             // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died  
             RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();  
             if (itStealEvent) {  
                 *itStealEvent = *itNoteOnEvent; // copy event  
                 itStealEvent->Param.Note.Layer = iLayer;  
                 itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;  
             }  
             else dmsg(1,("Voice stealing queue full!\n"));  
148          }          }
   
         return Pool<Voice>::Iterator(); // no free voice or error  
149      }      }
150    
151      /**      void Engine::TriggerReleaseVoices (
152       *  Will be called by LaunchVoice() method in case there are no free          LinuxSampler::EngineChannel*  pEngineChannel,
153       *  voices left. This method will select and kill one old voice for          RTList<Event>::Iterator&      itNoteOffEvent
154       *  voice stealing and postpone the note-on event until the selected      ) {
155       *  voice actually died.          EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
156       *          MidiKey* pKey = &pChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
157       *  @param pEngineChannel - engine channel on which this event occured on          // first, get total amount of required voices (dependant on amount of layers)
158       *  @param itNoteOnEvent - key, velocity and time stamp of the event          ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(itNoteOffEvent->Param.Note.Key);
159       */          if (pRegion) {
160      void Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {              int voicesRequired = pRegion->Layers;
         if (!pEventPool->poolIsEmpty()) {  
   
             RTList<uint>::Iterator  iuiOldestKey;  
             RTList<Voice>::Iterator itOldestVoice;  
   
             // Select one voice for voice stealing  
             switch (VOICE_STEAL_ALGORITHM) {  
   
                 // try to pick the oldest voice on the key where the new  
                 // voice should be spawned, if there is no voice on that  
                 // key, or no voice left to kill there, then procceed with  
                 // 'oldestkey' algorithm  
                 case voice_steal_algo_keymask: {  
                     midi_key_info_t* pOldestKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];  
                     if (itLastStolenVoice) {  
                         itOldestVoice = itLastStolenVoice;  
                         ++itOldestVoice;  
                     }  
                     else { // no voice stolen in this audio fragment cycle yet  
                         itOldestVoice = pOldestKey->pActiveVoices->first();  
                     }  
                     if (itOldestVoice) {  
                         iuiOldestKey = pOldestKey->itSelf;  
                         break; // selection succeeded  
                     }  
                 } // no break - intentional !  
   
                 // try to pick the oldest voice on the oldest active key  
                 // (caution: must stay after 'keymask' algorithm !)  
                 case voice_steal_algo_oldestkey: {  
                     if (itLastStolenVoice) {  
                         midi_key_info_t* pOldestKey = &pEngineChannel->pMIDIKeyInfo[*iuiLastStolenKey];  
                         itOldestVoice = itLastStolenVoice;  
                         ++itOldestVoice;  
                         if (!itOldestVoice) {  
                             iuiOldestKey = iuiLastStolenKey;  
                             ++iuiOldestKey;  
                             if (iuiOldestKey) {  
                                 midi_key_info_t* pOldestKey = &pEngineChannel->pMIDIKeyInfo[*iuiOldestKey];  
                                 itOldestVoice = pOldestKey->pActiveVoices->first();  
                             }  
                             else {  
                                 dmsg(1,("gig::Engine: Warning, too less voices, even for voice stealing! - Better recompile with higher MAX_AUDIO_VOICES.\n"));  
                                 return;  
                             }  
                         }  
                         else iuiOldestKey = iuiLastStolenKey;  
                     }  
                     else { // no voice stolen in this audio fragment cycle yet  
                         iuiOldestKey = pEngineChannel->pActiveKeys->first();  
                         midi_key_info_t* pOldestKey = &pEngineChannel->pMIDIKeyInfo[*iuiOldestKey];  
                         itOldestVoice = pOldestKey->pActiveVoices->first();  
                     }  
                     break;  
                 }  
   
                 // don't steal anything  
                 case voice_steal_algo_none:  
                 default: {  
                     dmsg(1,("No free voice (voice stealing disabled)!\n"));  
                     return;  
                 }  
             }  
161    
162              //FIXME: can be removed, just a sanity check for debugging              // MIDI note-on velocity is used instead of note-off velocity
163              if (!itOldestVoice->IsActive()) dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));              itNoteOffEvent->Param.Note.Velocity = pKey->Velocity;
164    
165              // now kill the selected voice              // now launch the required amount of voices
166              itOldestVoice->Kill(itNoteOnEvent);              for (int i = 0; i < voicesRequired; i++)
167              // remember which voice on which key we stole, so we can simply proceed for the next voice stealing                  LaunchVoice(pChannel, itNoteOffEvent, i, true, false, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
             this->itLastStolenVoice = itOldestVoice;  
             this->iuiLastStolenKey = iuiOldestKey;  
168          }          }
         else dmsg(1,("Event pool emtpy!\n"));  
169      }      }
170    
171      /**      Pool<Voice>::Iterator Engine::LaunchVoice (
172       *  Removes the given voice from the MIDI key's list of active voices.          LinuxSampler::EngineChannel*  pEngineChannel,
173       *  This method will be called when a voice went inactive, e.g. because          Pool<Event>::Iterator&        itNoteOnEvent,
174       *  it finished to playback its sample, finished its release stage or          int                           iLayer,
175       *  just was killed.          bool                          ReleaseTriggerVoice,
176       *          bool                          VoiceStealing,
177       *  @param pEngineChannel - engine channel on which this event occured on          bool                          HandleKeyGroupConflicts
178       *  @param itVoice - points to the voice to be freed      ) {
179       */          EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
180      void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) {          int MIDIKey = itNoteOnEvent->Param.Note.Key;
181          if (itVoice) {          EngineChannel::MidiKey* pKey  = &pChannel->pMIDIKeyInfo[MIDIKey];
182              midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoice->MIDIKey];          ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(MIDIKey);
183    
184              uint keygroup = itVoice->KeyGroup;          // if nothing defined for this key
185            if (!pRegion) return Pool<Voice>::Iterator(); // nothing to do
186              // free the voice object  
187              pVoicePool->free(itVoice);          int iKeyGroup = pRegion->KeyGroup;
188            // only need to send a group event from the first voice in a layered region,
189              // if no other voices left and member of a key group, remove from key group          // as all layers in a region always belongs to the same key group
190              if (pKey->pActiveVoices->isEmpty() && keygroup) {          if (HandleKeyGroupConflicts && iLayer == 0) pChannel->HandleKeyGroupConflicts(iKeyGroup, itNoteOnEvent);
191                  uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[keygroup];  
192                  if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group          Voice::type_t VoiceType = Voice::type_normal;
193              }  
194          }          // get current dimension values to select the right dimension region
195          else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;          //TODO: for stolen voices this dimension region selection block is processed twice, this should be changed
196      }          //FIXME: controller values for selecting the dimension region here are currently not sample accurate
197            uint DimValues[8] = { 0 };
198      /**          for (int i = pRegion->Dimensions - 1; i >= 0; i--) {
199       *  Called when there's no more voice left on a key, this call will              switch (pRegion->pDimensionDefinitions[i].dimension) {
200       *  update the key info respectively.                  case ::gig::dimension_samplechannel:
201       *                      DimValues[i] = 0; //TODO: we currently ignore this dimension
202       *  @param pEngineChannel - engine channel on which this event occured on                      break;
203       *  @param pKey - key which is now inactive                  case ::gig::dimension_layer:
204       */                      DimValues[i] = iLayer;
205      void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) {                      break;
206          if (pKey->pActiveVoices->isEmpty()) {                  case ::gig::dimension_velocity:
207              pKey->Active = false;                      DimValues[i] = itNoteOnEvent->Param.Note.Velocity;
208              pEngineChannel->pActiveKeys->free(pKey->itSelf); // remove key from list of active keys                      break;
209              pKey->itSelf = RTList<uint>::Iterator();                  case ::gig::dimension_channelaftertouch:
210              pKey->ReleaseTrigger = false;                      DimValues[i] = pChannel->ControllerTable[128];
211              pKey->pEvents->clear();                      break;
212              dmsg(3,("Key has no more voices now\n"));                  case ::gig::dimension_releasetrigger:
213          }                      VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;
214          else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n"));                      DimValues[i] = (uint) ReleaseTriggerVoice;
215      }                      break;
216                    case ::gig::dimension_keyboard:
217      /**                      DimValues[i] = (uint) (pChannel->CurrentKeyDimension * pRegion->pDimensionDefinitions[i].zones);
218       *  Reacts on supported control change commands (e.g. pitch bend wheel,                      break;
219       *  modulation wheel, aftertouch).                  case ::gig::dimension_roundrobin:
220       *                      DimValues[i] = uint(*pChannel->pMIDIKeyInfo[MIDIKey].pRoundRobinIndex % pRegion->pDimensionDefinitions[i].zones); // RoundRobinIndex is incremented for each note on in this Region
221       *  @param pEngineChannel - engine channel on which this event occured on                      break;
222       *  @param itControlChangeEvent - controller, value and time stamp of the event                  case ::gig::dimension_roundrobinkeyboard:
223       */                      DimValues[i] = uint(pChannel->RoundRobinIndex % pRegion->pDimensionDefinitions[i].zones); // RoundRobinIndex is incremented for each note on
224      void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) {                      break;
225          dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));                  case ::gig::dimension_random:
226                        DimValues[i] = uint(Random() * pRegion->pDimensionDefinitions[i].zones);
227          switch (itControlChangeEvent->Param.CC.Controller) {                      break;
228              case 64: {                  case ::gig::dimension_smartmidi:
229                  if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {                      DimValues[i] = 0;
230                      dmsg(4,("PEDAL DOWN\n"));                      break;
231                      pEngineChannel->SustainPedal = true;                  case ::gig::dimension_modwheel:
232                        DimValues[i] = pChannel->ControllerTable[1];
233                      // cancel release process of voices if necessary                      break;
234                      RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();                  case ::gig::dimension_breath:
235                      if (iuiKey) {                      DimValues[i] = pChannel->ControllerTable[2];
236                          itControlChangeEvent->Type = Event::type_cancel_release; // transform event type                      break;
237                          while (iuiKey) {                  case ::gig::dimension_foot:
238                              midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];                      DimValues[i] = pChannel->ControllerTable[4];
239                              ++iuiKey;                      break;
240                              if (!pKey->KeyPressed) {                  case ::gig::dimension_portamentotime:
241                                  RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();                      DimValues[i] = pChannel->ControllerTable[5];
242                                  if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list                      break;
243                                  else dmsg(1,("Event pool emtpy!\n"));                  case ::gig::dimension_effect1:
244                              }                      DimValues[i] = pChannel->ControllerTable[12];
245                          }                      break;
246                      }                  case ::gig::dimension_effect2:
247                  }                      DimValues[i] = pChannel->ControllerTable[13];
248                  if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {                      break;
249                      dmsg(4,("PEDAL UP\n"));                  case ::gig::dimension_genpurpose1:
250                      pEngineChannel->SustainPedal = false;                      DimValues[i] = pChannel->ControllerTable[16];
251                        break;
252                      // release voices if their respective key is not pressed                  case ::gig::dimension_genpurpose2:
253                      RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();                      DimValues[i] = pChannel->ControllerTable[17];
254                      if (iuiKey) {                      break;
255                          itControlChangeEvent->Type = Event::type_release; // transform event type                  case ::gig::dimension_genpurpose3:
256                          while (iuiKey) {                      DimValues[i] = pChannel->ControllerTable[18];
257                              midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];                      break;
258                              ++iuiKey;                  case ::gig::dimension_genpurpose4:
259                              if (!pKey->KeyPressed) {                      DimValues[i] = pChannel->ControllerTable[19];
260                                  RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();                      break;
261                                  if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list                  case ::gig::dimension_sustainpedal:
262                                  else dmsg(1,("Event pool emtpy!\n"));                      DimValues[i] = pChannel->ControllerTable[64];
263                              }                      break;
264                          }                  case ::gig::dimension_portamento:
265                      }                      DimValues[i] = pChannel->ControllerTable[65];
266                  }                      break;
267                  break;                  case ::gig::dimension_sostenutopedal:
268                        DimValues[i] = pChannel->ControllerTable[66];
269                        break;
270                    case ::gig::dimension_softpedal:
271                        DimValues[i] = pChannel->ControllerTable[67];
272                        break;
273                    case ::gig::dimension_genpurpose5:
274                        DimValues[i] = pChannel->ControllerTable[80];
275                        break;
276                    case ::gig::dimension_genpurpose6:
277                        DimValues[i] = pChannel->ControllerTable[81];
278                        break;
279                    case ::gig::dimension_genpurpose7:
280                        DimValues[i] = pChannel->ControllerTable[82];
281                        break;
282                    case ::gig::dimension_genpurpose8:
283                        DimValues[i] = pChannel->ControllerTable[83];
284                        break;
285                    case ::gig::dimension_effect1depth:
286                        DimValues[i] = pChannel->ControllerTable[91];
287                        break;
288                    case ::gig::dimension_effect2depth:
289                        DimValues[i] = pChannel->ControllerTable[92];
290                        break;
291                    case ::gig::dimension_effect3depth:
292                        DimValues[i] = pChannel->ControllerTable[93];
293                        break;
294                    case ::gig::dimension_effect4depth:
295                        DimValues[i] = pChannel->ControllerTable[94];
296                        break;
297                    case ::gig::dimension_effect5depth:
298                        DimValues[i] = pChannel->ControllerTable[95];
299                        break;
300                    case ::gig::dimension_none:
301                        std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;
302                        break;
303                    default:
304                        std::cerr << "gig::Engine::LaunchVoice() Error: Unknown dimension\n" << std::flush;
305              }              }
306          }          }
307    
308          // update controller value in the engine's controller table          // return if this is a release triggered voice and there is no
309          pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;          // releasetrigger dimension (could happen if an instrument
310            // change has occured between note on and off)
311            if (ReleaseTriggerVoice && !(VoiceType & Voice::type_release_trigger)) return Pool<Voice>::Iterator();
312    
313          // move event from the unsorted event list to the control change event list          
314          itControlChangeEvent.moveToEndOf(pCCEvents);          ::gig::DimensionRegion* pDimRgn;
315      }          if (!itNoteOnEvent->Format.Gig.DimMask) { // normal case ...
316                pDimRgn = pRegion->GetDimensionRegionByValue(DimValues);
317      /**          } else { // some dimension zones were overridden (i.e. by instrument script) ...
318       *  Reacts on MIDI system exclusive messages.              dmsg(3,("trigger with dim mask=%d val=%d\n", itNoteOnEvent->Format.Gig.DimMask, itNoteOnEvent->Format.Gig.DimBits));
319       *              int index = pRegion->GetDimensionRegionIndexByValue(DimValues);
320       *  @param itSysexEvent - sysex data size and time stamp of the sysex event              index &= ~itNoteOnEvent->Format.Gig.DimMask;
321       */              index |=  itNoteOnEvent->Format.Gig.DimBits & itNoteOnEvent->Format.Gig.DimMask;
322      void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {              pDimRgn = pRegion->pDimensionRegions[index & 255];
         RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader();  
   
         uint8_t exclusive_status, id;  
         if (!reader.pop(&exclusive_status)) goto free_sysex_data;  
         if (!reader.pop(&id))               goto free_sysex_data;  
         if (exclusive_status != 0xF0)       goto free_sysex_data;  
   
         switch (id) {  
             case 0x41: { // Roland  
                 uint8_t device_id, model_id, cmd_id;  
                 if (!reader.pop(&device_id)) goto free_sysex_data;  
                 if (!reader.pop(&model_id))  goto free_sysex_data;  
                 if (!reader.pop(&cmd_id))    goto free_sysex_data;  
                 if (model_id != 0x42 /*GS*/) goto free_sysex_data;  
                 if (cmd_id != 0x12 /*DT1*/)  goto free_sysex_data;  
   
                 // command address  
                 uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB)  
                 const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later  
                 if (reader.read(&addr[0], 3) != 3) goto free_sysex_data;  
                 if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters  
                 }  
                 else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters  
                 }  
                 else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)  
                     switch (addr[3]) {  
                         case 0x40: { // scale tuning  
                             uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave  
                             if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data;  
                             uint8_t checksum;  
                             if (!reader.pop(&checksum))                      goto free_sysex_data;  
                             if (GSCheckSum(checksum_reader, 12) != checksum) goto free_sysex_data;  
                             for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;  
                             AdjustScale((int8_t*) scale_tunes);  
                             break;  
                         }  
                     }  
                 }  
                 else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)  
                 }  
                 else if (addr[0] == 0x41) { // Drum Setup Parameters  
                 }  
                 break;  
             }  
323          }          }
324            if (!pDimRgn) return Pool<Voice>::Iterator(); // error (could not resolve dimension region)
325    
326          free_sysex_data: // finally free sysex data          // no need to continue if sample is silent
327          pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);          if (!pDimRgn->pSample || !pDimRgn->pSample->SamplesTotal) return Pool<Voice>::Iterator();
     }  
   
     /**  
      * Calculates the Roland GS sysex check sum.  
      *  
      * @param AddrReader - reader which currently points to the first GS  
      *                     command address byte of the GS sysex message in  
      *                     question  
      * @param DataSize   - size of the GS message data (in bytes)  
      */  
     uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) {  
         RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader;  
         uint bytes = 3 /*addr*/ + DataSize;  
         uint8_t addr_and_data[bytes];  
         reader.read(&addr_and_data[0], bytes);  
         uint8_t sum = 0;  
         for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];  
         return 128 - sum % 128;  
     }  
   
     /**  
      * Allows to tune each of the twelve semitones of an octave.  
      *  
      * @param ScaleTunes - detuning of all twelve semitones (in cents)  
      */  
     void Engine::AdjustScale(int8_t ScaleTunes[12]) {  
         memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate  
     }  
328    
329      /**          // allocate a new voice for the key
330       * Initialize the parameter sequence for the modulation destination given by          Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
      * by 'dst' with the constant value given by val.  
      */  
     void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) {  
         int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle();  
         float* m = &pSynthesisParameters[dst][0];  
         for (int i = 0; i < maxsamples; i += 4) {  
            m[i]   = val;  
            m[i+1] = val;  
            m[i+2] = val;  
            m[i+3] = val;  
         }  
     }      
331    
332      uint Engine::VoiceCount() {          int res = InitNewVoice (
333          return ActiveVoiceCount;                  pChannel, pDimRgn, itNoteOnEvent, VoiceType, iLayer,
334      }                  iKeyGroup, ReleaseTriggerVoice, VoiceStealing, itNewVoice
335            );
336            if (!res) return itNewVoice;
337    
338      uint Engine::VoiceCountMax() {          return Pool<Voice>::Iterator(); // no free voice or error
         return ActiveVoiceCountMax;  
339      }      }
340    
341      bool Engine::DiskStreamSupported() {      bool Engine::DiskStreamSupported() {
342          return true;          return true;
343      }      }
344    
     uint Engine::DiskStreamCount() {  
         return (pDiskThread) ? pDiskThread->ActiveStreamCount : 0;  
     }  
   
     uint Engine::DiskStreamCountMax() {  
         return (pDiskThread) ? pDiskThread->ActiveStreamCountMax : 0;  
     }  
   
     String Engine::DiskStreamBufferFillBytes() {  
         return pDiskThread->GetBufferFillBytes();  
     }  
   
     String Engine::DiskStreamBufferFillPercentage() {  
         return pDiskThread->GetBufferFillPercentage();  
     }  
   
     String Engine::EngineName() {  
         return "GigEngine";  
     }  
   
345      String Engine::Description() {      String Engine::Description() {
346          return "Gigasampler Engine";          return "GigaSampler Format Engine";
347      }      }
348    
349      String Engine::Version() {      String Engine::Version() {
350          String s = "$Revision: 1.26 $";          String s = "$Revision$";
351          return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword          return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
352      }      }
353    
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