/[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 250 by schoenebeck, Mon Sep 20 00:31:13 2004 UTC revision 3015 by schoenebeck, Tue Oct 18 20:13:08 2016 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) 2005-2008 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 20  Line 22 
22   *   MA  02111-1307  USA                                                   *   *   MA  02111-1307  USA                                                   *
23   ***************************************************************************/   ***************************************************************************/
24    
 #include <sstream>  
 #include "DiskThread.h"  
 #include "Voice.h"  
   
25  #include "Engine.h"  #include "Engine.h"
26    #include "EngineChannel.h"
27    #include "InstrumentScriptVM.h"
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      Engine::Engine() {          if (pScriptVM) return;
35          pRIFF              = NULL;          pScriptVM = new InstrumentScriptVM; // gig format specific extended script runner
         pGig               = NULL;  
         pInstrument        = NULL;  
         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 RTELMemoryPool<Event>(MAX_EVENTS_PER_FRAGMENT);  
         pVoicePool         = new RTELMemoryPool<Voice>(MAX_AUDIO_VOICES);  
         pActiveKeys        = new RTELMemoryPool<uint>(128);  
         pVoiceStealingQueue = new RTEList<Event>(pEventPool);  
         pEvents            = new RTEList<Event>(pEventPool);  
         pCCEvents          = new RTEList<Event>(pEventPool);  
         for (uint i = 0; i < Event::destination_count; i++) {  
             pSynthesisEvents[i] = new RTEList<Event>(pEventPool);  
         }  
         for (uint i = 0; i < 128; i++) {  
             pMIDIKeyInfo[i].pActiveVoices  = new RTEList<Voice>(pVoicePool);  
             pMIDIKeyInfo[i].KeyPressed     = false;  
             pMIDIKeyInfo[i].Active         = false;  
             pMIDIKeyInfo[i].ReleaseTrigger = false;  
             pMIDIKeyInfo[i].pSelf          = NULL;  
             pMIDIKeyInfo[i].pEvents        = new RTEList<Event>(pEventPool);  
         }  
         for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {  
             pVoice->SetEngine(this);  
         }  
         pVoicePool->clear();  
   
         pSynthesisParameters[0] = NULL; // we allocate when an audio device is connected  
         pBasicFilterParameters  = NULL;  
         pMainFilterParameters   = NULL;  
   
         InstrumentIdx = -1;  
         InstrumentStat = -1;  
   
         AudioDeviceChannelLeft  = -1;  
         AudioDeviceChannelRight = -1;  
   
         ResetInternal();  
     }  
   
     Engine::~Engine() {  
         if (pDiskThread) {  
             pDiskThread->StopThread();  
             delete pDiskThread;  
         }  
         if (pGig)  delete pGig;  
         if (pRIFF) delete pRIFF;  
         for (uint i = 0; i < 128; i++) {  
             if (pMIDIKeyInfo[i].pActiveVoices) delete pMIDIKeyInfo[i].pActiveVoices;  
             if (pMIDIKeyInfo[i].pEvents)       delete pMIDIKeyInfo[i].pEvents;  
         }  
         for (uint i = 0; i < Event::destination_count; i++) {  
             if (pSynthesisEvents[i]) delete pSynthesisEvents[i];  
         }  
         delete[] pSynthesisEvents;  
         if (pEvents)     delete pEvents;  
         if (pCCEvents)   delete pCCEvents;  
         if (pEventQueue) delete pEventQueue;  
         if (pEventPool)  delete pEventPool;  
         if (pVoicePool)  delete pVoicePool;  
         if (pActiveKeys) delete pActiveKeys;  
         if (pSysexBuffer) delete pSysexBuffer;  
         if (pEventGenerator) delete pEventGenerator;  
         if (pMainFilterParameters) delete[] pMainFilterParameters;  
         if (pBasicFilterParameters) delete[] pBasicFilterParameters;  
         if (pSynthesisParameters[0]) delete[] pSynthesisParameters[0];  
         if (pVoiceStealingQueue) delete pVoiceStealingQueue;  
     }  
   
     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"));  
     }  
   
     /**  
      *  Reset all voices and disk thread and clear input event queue and all  
      *  control and status variables.  
      */  
     void Engine::Reset() {  
         DisableAndLock();  
   
         //if (pAudioOutputDevice->IsPlaying()) { // if already running  
             /*  
             // signal audio thread not to enter render part anymore  
             SuspensionRequested = true;  
             // sleep until wakened by audio thread  
             pthread_mutex_lock(&__render_state_mutex);  
             pthread_cond_wait(&__render_exit_condition, &__render_state_mutex);  
             pthread_mutex_unlock(&__render_state_mutex);  
             */  
         //}  
   
         //if (wasplaying) pAudioOutputDevice->Stop();  
   
         ResetInternal();  
   
         // signal audio thread to continue with rendering  
         //SuspensionRequested = false;  
         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() {  
         Pitch               = 0;  
         SustainPedal        = false;  
         ActiveVoiceCount    = 0;  
         ActiveVoiceCountMax = 0;  
         GlobalVolume        = 1.0;  
   
         // reset voice stealing parameters  
         pLastStolenVoice = NULL;  
         puiLastStolenKey = NULL;  
         pVoiceStealingQueue->clear();  
   
         // reset to normal chromatic scale (means equal temper)  
         memset(&ScaleTuning[0], 0x00, 12);  
   
         // set all MIDI controller values to zero  
         memset(ControllerTable, 0x00, 128);  
   
         // reset key info  
         for (uint i = 0; i < 128; i++) {  
             pMIDIKeyInfo[i].pActiveVoices->clear();  
             pMIDIKeyInfo[i].pEvents->clear();  
             pMIDIKeyInfo[i].KeyPressed     = false;  
             pMIDIKeyInfo[i].Active         = false;  
             pMIDIKeyInfo[i].ReleaseTrigger = false;  
             pMIDIKeyInfo[i].pSelf          = NULL;  
         }  
   
         // reset all key groups  
         map<uint,uint*>::iterator iter = ActiveKeyGroups.begin();  
         for (; iter != ActiveKeyGroups.end(); iter++) iter->second = NULL;  
   
         // reset all voices  
         for (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {  
             pVoice->Reset();  
         }  
         pVoicePool->clear();  
   
         // free all active keys  
         pActiveKeys->clear();  
   
         // reset disk thread  
         if (pDiskThread) pDiskThread->Reset();  
   
         // delete all input events  
         pEventQueue->init();  
     }  
   
     /**  
      *  Load an instrument from a .gig file.  
      *  
      *  @param FileName   - file name of the Gigasampler instrument file  
      *  @param Instrument - index of the instrument in the .gig file  
      *  @throws LinuxSamplerException  on error  
      *  @returns          detailed description of the method call result  
      */  
     void Engine::LoadInstrument(const char* FileName, uint Instrument) {  
   
         DisableAndLock();  
   
         ResetInternal(); // reset engine  
   
         // free old instrument  
         if (pInstrument) {  
             // give old instrument back to instrument manager  
             Instruments.HandBack(pInstrument, this);  
         }  
   
         InstrumentFile = FileName;  
         InstrumentIdx = Instrument;  
         InstrumentStat = 0;  
   
         // delete all key groups  
         ActiveKeyGroups.clear();  
   
         // request gig instrument from instrument manager  
         try {  
             instrument_id_t instrid;  
             instrid.FileName    = FileName;  
             instrid.iInstrument = Instrument;  
             pInstrument = Instruments.Borrow(instrid, this);  
             if (!pInstrument) {  
                 InstrumentStat = -1;  
                 dmsg(1,("no instrument loaded!!!\n"));  
                 exit(EXIT_FAILURE);  
             }  
         }  
         catch (RIFF::Exception e) {  
             InstrumentStat = -2;  
             String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message;  
             throw LinuxSamplerException(msg);  
         }  
         catch (InstrumentResourceManagerException e) {  
             InstrumentStat = -3;  
             String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message();  
             throw LinuxSamplerException(msg);  
         }  
         catch (...) {  
             InstrumentStat = -4;  
             throw LinuxSamplerException("gig::Engine error: Failed to load instrument, cause: Unknown exception while trying to parse gig file.");  
         }  
   
         // rebuild ActiveKeyGroups map with key groups of current instrument  
         for (::gig::Region* pRegion = pInstrument->GetFirstRegion(); pRegion; pRegion = pInstrument->GetNextRegion())  
             if (pRegion->KeyGroup) ActiveKeyGroups[pRegion->KeyGroup] = NULL;  
   
         InstrumentStat = 100;  
   
         // inform audio driver for the need of two channels  
         try {  
             if (pAudioOutputDevice) 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);  
         }  
   
         Enable();  
     }  
   
     /**  
      * Will be called by the InstrumentResourceManager when the instrument  
      * we are currently using in this engine is going to be updated, so we  
      * can stop playback before that happens.  
      */  
     void Engine::ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg) {  
         dmsg(3,("gig::Engine: Received instrument update message.\n"));  
         DisableAndLock();  
         ResetInternal();  
         this->pInstrument = NULL;  
     }  
   
     /**  
      * Will be called by the InstrumentResourceManager when the instrument  
      * update process was completed, so we can continue with playback.  
      */  
     void Engine::ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg) {  
         this->pInstrument = pNewResource; //TODO: there are couple of engine parameters we should update here as well if the instrument was updated (see LoadInstrument())  
         Enable();  
     }  
   
     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->AudioDeviceChannelLeft  = 0;  
         this->AudioDeviceChannelRight = 1;  
         this->pOutputLeft             = pAudioOutputDevice->Channel(0)->Buffer();  
         this->pOutputRight            = pAudioOutputDevice->Channel(1)->Buffer();  
         this->MaxSamplesPerCycle      = pAudioOutputDevice->MaxSamplesPerCycle();  
         this->SampleRate              = pAudioOutputDevice->SampleRate();  
   
         // (re)create disk thread  
         if (this->pDiskThread) {  
             this->pDiskThread->StopThread();  
             delete this->pDiskThread;  
         }  
         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 (Voice* pVoice = pVoicePool->alloc(); pVoice; pVoice = pVoicePool->alloc()) {  
             pVoice->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]) delete[] pSynthesisParameters[0];  
         pSynthesisParameters[0] = new float[Event::destination_count * pAudioOut->MaxSamplesPerCycle()];  
         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 (Voice* pVoice = pVoicePool->first(); pVoice; pVoice = pVoicePool->next()) {  
             if (!pVoice->pDiskThread) {  
                 dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));  
                 exit(EXIT_FAILURE);  
             }  
         }  
     }  
   
     void Engine::DisconnectAudioOutputDevice() {  
         if (pAudioOutputDevice) { // if clause to prevent disconnect loops  
             AudioOutputDevice* olddevice = pAudioOutputDevice;  
             pAudioOutputDevice = NULL;  
             olddevice->Disconnect(this);  
             AudioDeviceChannelLeft  = -1;  
             AudioDeviceChannelRight = -1;  
         }  
     }  
   
     /**  
      *  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.  
      *  
      *  @param Samples - number of sample points to be rendered  
      *  @returns       0 on success  
      */  
     int Engine::RenderAudio(uint Samples) {  
         dmsg(5,("RenderAudio(Samples=%d)\n", Samples));  
   
         // return if no instrument loaded or engine disabled  
         if (EngineDisabled.Pop()) {  
             dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));  
             return 0;  
         }  
         if (!pInstrument) {  
             dmsg(5,("gig::Engine: no instrument loaded\n"));  
             return 0;  
         }  
   
   
         // empty the event lists for the new fragment  
         pEvents->clear();  
         pCCEvents->clear();  
         for (uint i = 0; i < Event::destination_count; i++) {  
             pSynthesisEvents[i]->clear();  
         }  
         for (uint* puiKey = pActiveKeys->first(); puiKey; puiKey = pActiveKeys->next()) {  
             midi_key_info_t* pKey = &pMIDIKeyInfo[*puiKey];  
             pKey->pEvents->clear(); // free all events on the key  
         }  
   
         // read and copy events from input queue  
         Event event = pEventGenerator->CreateEvent();  
         while (true) {  
             if (!pEventQueue->pop(&event)) break;  
             pEvents->alloc_assign(event);  
         }  
   
   
         // update time of start and end of this audio fragment (as events' time stamps relate to this)  
         pEventGenerator->UpdateFragmentTime(Samples);  
   
   
         // process events  
         Event* pNextEvent = pEvents->first();  
         while (pNextEvent) {  
             Event* pEvent = pNextEvent;  
             pEvents->set_current(pEvent);  
             pNextEvent = pEvents->next();  
             switch (pEvent->Type) {  
                 case Event::type_note_on:  
                     dmsg(5,("Engine: Note on received\n"));  
                     ProcessNoteOn(pEvent);  
                     break;  
                 case Event::type_note_off:  
                     dmsg(5,("Engine: Note off received\n"));  
                     ProcessNoteOff(pEvent);  
                     break;  
                 case Event::type_control_change:  
                     dmsg(5,("Engine: MIDI CC received\n"));  
                     ProcessControlChange(pEvent);  
                     break;  
                 case Event::type_pitchbend:  
                     dmsg(5,("Engine: Pitchbend received\n"));  
                     ProcessPitchbend(pEvent);  
                     break;  
                 case Event::type_sysex:  
                     dmsg(5,("Engine: Sysex received\n"));  
                     ProcessSysex(pEvent);  
                     break;  
             }  
         }  
   
   
         // render audio from all active voices  
         int active_voices = 0;  
         uint* piKey = pActiveKeys->first();  
         while (piKey) { // iterate through all active keys  
             midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];  
             pActiveKeys->set_current(piKey);  
             piKey = pActiveKeys->next();  
   
             Voice* pVoiceNext = pKey->pActiveVoices->first();  
             while (pVoiceNext) { // iterate through all voices on this key  
                 // already get next voice on key  
                 Voice* pVoice = pVoiceNext;  
                 pKey->pActiveVoices->set_current(pVoice);  
                 pVoiceNext = pKey->pActiveVoices->next();  
   
                 // now render current voice  
                 pVoice->Render(Samples);  
                 if (pVoice->IsActive()) active_voices++; // still active  
                 else { // voice reached end, is now inactive  
                     KillVoiceImmediately(pVoice); // remove voice from the list of active voices  
                 }  
             }  
         }  
   
   
         // now render all postponed voices from voice stealing  
         Event* pVoiceStealEvent = pVoiceStealingQueue->first();  
         while (pVoiceStealEvent) {  
             Voice* pNewVoice = LaunchVoice(pVoiceStealEvent, pVoiceStealEvent->Param.Note.Layer, pVoiceStealEvent->Param.Note.ReleaseTrigger, false);  
             if (pNewVoice) {  
                 pNewVoice->Render(Samples);  
                 if (pNewVoice->IsActive()) active_voices++; // still active  
                 else { // voice reached end, is now inactive  
                     KillVoiceImmediately(pNewVoice); // remove voice from the list of active voices  
                 }  
             }  
             else dmsg(1,("Ouch, voice stealing didn't work out!\n"));  
             pVoiceStealEvent = pVoiceStealingQueue->next();  
         }  
         // reset voice stealing for the new fragment  
         pVoiceStealingQueue->clear();  
         pLastStolenVoice = NULL;  
         puiLastStolenKey = NULL;  
   
   
         // write that to the disk thread class so that it can print it  
         // on the console for debugging purposes  
         ActiveVoiceCount = active_voices;  
         if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;  
   
   
         return 0;  
     }  
   
     /**  
      *  Will be called by the MIDIIn Thread to let the audio thread trigger a new  
      *  voice for the given key.  
      *  
      *  @param Key      - MIDI key number of the triggered key  
      *  @param Velocity - MIDI velocity value of the triggered key  
      */  
     void Engine::SendNoteOn(uint8_t Key, uint8_t Velocity) {  
         Event event               = pEventGenerator->CreateEvent();  
         event.Type                = Event::type_note_on;  
         event.Param.Note.Key      = Key;  
         event.Param.Note.Velocity = Velocity;  
         if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);  
         else dmsg(1,("Engine: Input event queue full!"));  
     }  
   
     /**  
      *  Will be called by the MIDIIn Thread to signal the audio thread to release  
      *  voice(s) on the given key.  
      *  
      *  @param Key      - MIDI key number of the released key  
      *  @param Velocity - MIDI release velocity value of the released key  
      */  
     void Engine::SendNoteOff(uint8_t Key, uint8_t Velocity) {  
         Event event               = pEventGenerator->CreateEvent();  
         event.Type                = Event::type_note_off;  
         event.Param.Note.Key      = Key;  
         event.Param.Note.Velocity = Velocity;  
         if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);  
         else dmsg(1,("Engine: Input event queue full!"));  
     }  
   
     /**  
      *  Will be called by the MIDIIn Thread to signal the audio thread to change  
      *  the pitch value for all voices.  
      *  
      *  @param Pitch - MIDI pitch value (-8192 ... +8191)  
      */  
     void Engine::SendPitchbend(int Pitch) {  
         Event event             = pEventGenerator->CreateEvent();  
         event.Type              = Event::type_pitchbend;  
         event.Param.Pitch.Pitch = Pitch;  
         if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);  
         else dmsg(1,("Engine: Input event queue full!"));  
     }  
   
     /**  
      *  Will be called by the MIDIIn Thread to signal the audio thread that a  
      *  continuous controller value has changed.  
      *  
      *  @param Controller - MIDI controller number of the occured control change  
      *  @param Value      - value of the control change  
      */  
     void Engine::SendControlChange(uint8_t Controller, uint8_t Value) {  
         Event event               = pEventGenerator->CreateEvent();  
         event.Type                = Event::type_control_change;  
         event.Param.CC.Controller = Controller;  
         event.Param.CC.Value      = Value;  
         if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);  
         else dmsg(1,("Engine: Input event queue full!"));  
     }  
   
     /**  
      *  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!"));  
     }  
   
     /**  
      *  Assigns and triggers a new voice for the respective MIDI key.  
      *  
      *  @param pNoteOnEvent - key, velocity and time stamp of the event  
      */  
     void Engine::ProcessNoteOn(Event* pNoteOnEvent) {  
         midi_key_info_t* pKey = &pMIDIKeyInfo[pNoteOnEvent->Param.Note.Key];  
   
         pKey->KeyPressed = true; // the MIDI key was now pressed down  
   
         // cancel release process of voices on this key if needed  
         if (pKey->Active && !SustainPedal) {  
             Event* pCancelReleaseEvent = pKey->pEvents->alloc();  
             if (pCancelReleaseEvent) {  
                 *pCancelReleaseEvent = *pNoteOnEvent;  
                 pCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type  
             }  
             else dmsg(1,("Event pool emtpy!\n"));  
         }  
   
         // allocate and trigger a new voice for the key  
         LaunchVoice(pNoteOnEvent);  
   
         // finally move note on event to the key's own event list  
         pEvents->move(pNoteOnEvent, pKey->pEvents);  
     }  
   
     /**  
      *  Releases the voices on the given key if sustain pedal is not pressed.  
      *  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 pNoteOffEvent - key, velocity and time stamp of the event  
      */  
     void Engine::ProcessNoteOff(Event* pNoteOffEvent) {  
         midi_key_info_t* pKey = &pMIDIKeyInfo[pNoteOffEvent->Param.Note.Key];  
   
         pKey->KeyPressed = false; // the MIDI key was now released  
   
         // release voices on this key if needed  
         if (pKey->Active && !SustainPedal) {  
             pNoteOffEvent->Type = Event::type_release; // transform event type  
         }  
   
         // spawn release triggered voice(s) if needed  
         if (pKey->ReleaseTrigger) {  
             LaunchVoice(pNoteOffEvent, 0, true);  
             pKey->ReleaseTrigger = false;  
         }  
   
         // move event to the key's own event list  
         pEvents->move(pNoteOffEvent, pKey->pEvents);  
     }  
   
     /**  
      *  Moves pitchbend event from the general (input) event list to the pitch  
      *  event list.  
      *  
      *  @param pPitchbendEvent - absolute pitch value and time stamp of the event  
      */  
     void Engine::ProcessPitchbend(Event* pPitchbendEvent) {  
         this->Pitch = pPitchbendEvent->Param.Pitch.Pitch; // store current pitch value  
         pEvents->move(pPitchbendEvent, pSynthesisEvents[Event::destination_vco]);  
     }  
   
     /**  
      *  Allocates and triggers a new voice. This method will usually be  
      *  called by the ProcessNoteOn() method and by the voices itself  
      *  (e.g. to spawn further voices on the same key for layered sounds).  
      *  
      *  @param pNoteOnEvent        - key, velocity and time stamp of the event  
      *  @param iLayer              - layer index for the new voice (optional - only  
      *                               in case of layered sounds of course)  
      *  @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 an error occured while trying to trigger the new voice  
      */  
     Voice* Engine::LaunchVoice(Event* pNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing) {  
         midi_key_info_t* pKey = &pMIDIKeyInfo[pNoteOnEvent->Param.Note.Key];  
   
         // 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, iLayer, ReleaseTriggerVoice) < 0) {  
                 dmsg(1,("Triggering new voice failed!\n"));  
                 pKey->pActiveVoices->free(pNewVoice);  
             }  
             else { // on success  
                 uint** ppKeyGroup = NULL;  
                 if (pNewVoice->KeyGroup) { // if this voice / key belongs to a key group  
                     ppKeyGroup = &ActiveKeyGroups[pNewVoice->KeyGroup];  
                     if (*ppKeyGroup) { // if there's already an active key in that key group  
                         midi_key_info_t* pOtherKey = &pMIDIKeyInfo[**ppKeyGroup];  
                         // kill all voices on the (other) key  
                         Voice* pVoiceToBeKilled = pOtherKey->pActiveVoices->first();  
                         while (pVoiceToBeKilled) {  
                             Voice* pVoiceToBeKilledNext = pOtherKey->pActiveVoices->next();  
                             if (pVoiceToBeKilled->Type != Voice::type_release_trigger) pVoiceToBeKilled->Kill(pNoteOnEvent);  
                             pOtherKey->pActiveVoices->set_current(pVoiceToBeKilled);  
                             pVoiceToBeKilled = pVoiceToBeKilledNext;  
                         }  
                     }  
                 }  
                 if (!pKey->Active) { // mark as active key  
                     pKey->Active = true;  
                     pKey->pSelf  = pActiveKeys->alloc();  
                     *pKey->pSelf = pNoteOnEvent->Param.Note.Key;  
                 }  
                 if (pNewVoice->KeyGroup) {  
                     *ppKeyGroup = pKey->pSelf; // put key as the (new) active key to its key group  
                 }  
                 if (pNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)  
                 return pNewVoice; // success  
             }  
         }  
         else if (VoiceStealing) StealVoice(pNoteOnEvent, iLayer, ReleaseTriggerVoice); // no free voice left, so steal one  
   
         return NULL; // no free voice or error  
     }  
   
     /**  
      *  Will be called by LaunchVoice() method in case there are no free  
      *  voices left. This method will select and kill one old voice for  
      *  voice stealing and postpone the note-on event until the selected  
      *  voice actually died.  
      *  
      *  @param pNoteOnEvent        - key, velocity and time stamp of the event  
      *  @param iLayer              - layer index for the new voice  
      *  @param ReleaseTriggerVoice - if new voice is a release triggered voice  
      */  
     void Engine::StealVoice(Event* pNoteOnEvent, int iLayer, bool ReleaseTriggerVoice) {  
         if (!pEventPool->pool_is_empty()) {  
   
             uint*  puiOldestKey;  
             Voice* pOldestVoice;  
   
             // 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 = &pMIDIKeyInfo[pNoteOnEvent->Param.Note.Key];  
                     if (pLastStolenVoice) {  
                         pOldestKey->pActiveVoices->set_current(pLastStolenVoice);  
                         pOldestVoice = pOldestKey->pActiveVoices->next();  
                     }  
                     else { // no voice stolen in this audio fragment cycle yet  
                         pOldestVoice = pOldestKey->pActiveVoices->first();  
                     }  
                     if (pOldestVoice) {  
                         puiOldestKey = pOldestKey->pSelf;  
                         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 (pLastStolenVoice) {  
                         midi_key_info_t* pOldestKey = &pMIDIKeyInfo[*puiLastStolenKey];  
                         pOldestKey->pActiveVoices->set_current(pLastStolenVoice);  
                         pOldestVoice = pOldestKey->pActiveVoices->next();  
                         if (!pOldestVoice) {  
                             pActiveKeys->set_current(puiLastStolenKey);  
                             puiOldestKey = pActiveKeys->next();  
                             if (puiOldestKey) {  
                                 midi_key_info_t* pOldestKey = &pMIDIKeyInfo[*puiOldestKey];  
                                 pOldestVoice = pOldestKey->pActiveVoices->first();  
                             }  
                             else { // too less voices, even for voice stealing  
                                 dmsg(1,("Voice overflow! - You might recompile with higher MAX_AUDIO_VOICES!\n"));  
                                 return;  
                             }  
                         }  
                         else puiOldestKey = puiLastStolenKey;  
                     }  
                     else { // no voice stolen in this audio fragment cycle yet  
                         puiOldestKey = pActiveKeys->first();  
                         midi_key_info_t* pOldestKey = &pMIDIKeyInfo[*puiOldestKey];  
                         pOldestVoice = pOldestKey->pActiveVoices->first();  
                     }  
                     break;  
                 }  
   
                 // don't steal anything  
                 case voice_steal_algo_none:  
                 default: {  
                     dmsg(1,("No free voice (voice stealing disabled)!\n"));  
                     return;  
                 }  
             }  
   
             // now kill the selected voice  
             pOldestVoice->Kill(pNoteOnEvent);  
             // remember which voice on which key we stole, so we can simply proceed for the next voice stealing  
             this->pLastStolenVoice = pOldestVoice;  
             this->puiLastStolenKey = puiOldestKey;  
             // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died  
             Event* pStealEvent = pVoiceStealingQueue->alloc();  
             *pStealEvent = *pNoteOnEvent;  
             pStealEvent->Param.Note.Layer = iLayer;  
             pStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;  
         }  
         else dmsg(1,("Event pool emtpy!\n"));  
     }  
   
     /**  
      *  Immediately kills the voice given with pVoice (no matter if sustain is  
      *  pressed or not) and removes it from the MIDI key's list of active voice.  
      *  This method will e.g. be called if a voice went inactive by itself.  
      *  
      *  @param pVoice - points to the voice to be killed  
      */  
     void Engine::KillVoiceImmediately(Voice* pVoice) {  
         if (pVoice) {  
             if (pVoice->IsActive()) pVoice->KillImmediately();  
   
             midi_key_info_t* pKey = &pMIDIKeyInfo[pVoice->MIDIKey];  
   
             // free the voice object  
             pVoicePool->free(pVoice);  
   
             // check if there are no voices left on the MIDI key and update the key info if so  
             if (pKey->pActiveVoices->is_empty()) {  
                 if (pVoice->KeyGroup) { // if voice / key belongs to a key group  
                     uint** ppKeyGroup = &ActiveKeyGroups[pVoice->KeyGroup];  
                     if (*ppKeyGroup == pKey->pSelf) *ppKeyGroup = NULL; // remove key from key group  
                 }  
                 pKey->Active = false;  
                 pActiveKeys->free(pKey->pSelf); // remove key from list of active keys  
                 pKey->pSelf = NULL;  
                 pKey->ReleaseTrigger = false;  
                 pKey->pEvents->clear();  
                 dmsg(3,("Key has no more voices now\n"));  
             }  
         }  
         else std::cerr << "Couldn't release voice! (pVoice == NULL)\n" << std::flush;  
36      }      }
37    
38      /**      /**
39       *  Reacts on supported control change commands (e.g. pitch bend wheel,       *  Reacts on supported control change commands (e.g. pitch bend wheel,
40       *  modulation wheel, aftertouch).       *  modulation wheel, aftertouch).
41       *       *
42       *  @param pControlChangeEvent - controller, value and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
43         *  @param itControlChangeEvent - controller, value and time stamp of the event
44       */       */
45      void Engine::ProcessControlChange(Event* pControlChangeEvent) {      void Engine::ProcessControlChange (
46          dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", pControlChangeEvent->Param.CC.Controller, pControlChangeEvent->Param.CC.Value));          LinuxSampler::EngineChannel*  pEngineChannel,
47            Pool<Event>::Iterator&        itControlChangeEvent
48          switch (pControlChangeEvent->Param.CC.Controller) {      ) {
49              case 64: {          dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
50                  if (pControlChangeEvent->Param.CC.Value >= 64 && !SustainPedal) {  
51                      dmsg(4,("PEDAL DOWN\n"));          EngineChannel* pChannel = dynamic_cast<EngineChannel*>(pEngineChannel);
52                      SustainPedal = true;          // handle the "control triggered" MIDI rule: a control change
53            // event can trigger a new note on or note off event
54                      // cancel release process of voices if necessary          if (pChannel->pInstrument) {
55                      uint* piKey = pActiveKeys->first();  
56                      if (piKey) {              ::gig::MidiRule* rule;
57                          pControlChangeEvent->Type = Event::type_cancel_release; // transform event type              for (int i = 0 ; (rule = pChannel->pInstrument->GetMidiRule(i)) ; i++) {
58                          while (piKey) {  
59                              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];                  if (::gig::MidiRuleCtrlTrigger* ctrlTrigger =
60                              pActiveKeys->set_current(piKey);                      dynamic_cast< ::gig::MidiRuleCtrlTrigger*>(rule)) {
61                              piKey = pActiveKeys->next();                      if (itControlChangeEvent->Param.CC.Controller ==
62                              if (!pKey->KeyPressed) {                          ctrlTrigger->ControllerNumber) {
63                                  Event* pNewEvent = pKey->pEvents->alloc();  
64                                  if (pNewEvent) *pNewEvent = *pControlChangeEvent; // copy event to the key's own event list                          uint8_t oldCCValue = pChannel->ControllerTable[
65                                  else dmsg(1,("Event pool emtpy!\n"));                              itControlChangeEvent->Param.CC.Controller];
66                              }                          uint8_t newCCValue = itControlChangeEvent->Param.CC.Value;
67                          }  
68                      }                          for (int i = 0 ; i < ctrlTrigger->Triggers ; i++) {
69                  }                              ::gig::MidiRuleCtrlTrigger::trigger_t* pTrigger =
70                  if (pControlChangeEvent->Param.CC.Value < 64 && SustainPedal) {                                    &ctrlTrigger->pTriggers[i];
71                      dmsg(4,("PEDAL UP\n"));  
72                      SustainPedal = false;                              // check if the controller has passed the
73                                // trigger point in the right direction
74                      // release voices if their respective key is not pressed                              if ((pTrigger->Descending &&
75                      uint* piKey = pActiveKeys->first();                                   oldCCValue > pTrigger->TriggerPoint &&
76                      if (piKey) {                                   newCCValue <= pTrigger->TriggerPoint) ||
77                          pControlChangeEvent->Type = Event::type_release; // transform event type                                  (!pTrigger->Descending &&
78                          while (piKey) {                                   oldCCValue < pTrigger->TriggerPoint &&
79                              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];                                   newCCValue >= pTrigger->TriggerPoint)) {
80                              pActiveKeys->set_current(piKey);  
81                              piKey = pActiveKeys->next();                                  RTList<Event>::Iterator itNewEvent = pGlobalEvents->allocAppend();
82                              if (!pKey->KeyPressed) {                                  if (itNewEvent) {
83                                  Event* pNewEvent = pKey->pEvents->alloc();                                      *itNewEvent = *itControlChangeEvent;
84                                  if (pNewEvent) *pNewEvent = *pControlChangeEvent; // copy event to the key's own event list                                      itNewEvent->Param.Note.Key = pTrigger->Key;
85    
86                                        if (pTrigger->NoteOff || pTrigger->Velocity == 0) {
87                                            itNewEvent->Type = Event::type_note_off;
88                                            itNewEvent->Param.Note.Velocity = 100;
89    
90                                            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"));                                  else dmsg(1,("Event pool emtpy!\n"));
103                              }                              }
104                          }                          }
105                      }                      }
106                  }                  }
                 break;  
107              }              }
108          }          }
109    
110          // update controller value in the engine's controller table          // update controller value in the engine channel's controller table
111          ControllerTable[pControlChangeEvent->Param.CC.Controller] = pControlChangeEvent->Param.CC.Value;          pChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
112    
113          // move event from the unsorted event list to the control change event list          ProcessHardcodedControllers(pEngineChannel, itControlChangeEvent);
         pEvents->move(pControlChangeEvent, pCCEvents);  
     }  
114    
115      /**          // handle FX send controllers
116       *  Reacts on MIDI system exclusive messages.          ProcessFxSendControllers(pChannel, itControlChangeEvent);
      *  
      *  @param pSysexEvent - sysex data size and time stamp of the sysex event  
      */  
     void Engine::ProcessSysex(Event* pSysexEvent) {  
         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;  
             }  
         }  
   
         free_sysex_data: // finally free sysex data  
         pSysexBuffer->increment_read_ptr(pSysexEvent->Param.Sysex.Size);  
     }  
   
     /**  
      * 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  
117      }      }
118    
119      /**      void Engine::ProcessChannelPressure(LinuxSampler::EngineChannel* pEngineChannel, Pool<Event>::Iterator& itChannelPressureEvent) {
120       * Initialize the parameter sequence for the modulation destination given by          // forward this to the CC routine, so it updates the current aftertouch value and may handle aftertouch trigger rules
121       * by 'dst' with the constant value given by val.          ProcessControlChange(pEngineChannel, itChannelPressureEvent);
122       */  
123      void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) {          // if required: engine global aftertouch handling (apart from the per voice handling)
124          int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle();      }
125          float* m = &pSynthesisParameters[dst][0];  
126          for (int i = 0; i < maxsamples; i += 4) {      void Engine::ProcessPolyphonicKeyPressure(LinuxSampler::EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNotePressureEvent) {
127             m[i]   = val;          // if required: engine global aftertouch handling (apart from the per voice handling)
128             m[i+1] = val;      }
129             m[i+2] = val;  
130             m[i+3] = val;      DiskThread* Engine::CreateDiskThread() {
131            return new DiskThread (
132                iMaxDiskStreams,
133                ((pAudioOutputDevice->MaxSamplesPerCycle() << CONFIG_MAX_PITCH) << 1) + 6, //FIXME: assuming stereo
134                &instruments
135            );
136        }
137    
138        void Engine::TriggerNewVoices (
139            LinuxSampler::EngineChannel* pEngineChannel,
140            RTList<Event>::Iterator&     itNoteOnEvent,
141            bool                         HandleKeyGroupConflicts
142        ) {
143            EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
144            // first, get total amount of required voices (dependant on amount of layers)
145            ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(itNoteOnEvent->Param.Note.Key);
146            if (!pRegion || RegionSuspended(pRegion))
147                return;
148            const int voicesRequired = pRegion->Layers;
149            if (voicesRequired <= 0)
150                return;
151    
152            NoteIterator itNote = GetNotePool()->fromID(itNoteOnEvent->Param.Note.ID);
153            if (!itNote) {
154                dmsg(1,("gig::Engine: No Note object for triggering new voices!\n"));
155                return;
156            }
157    
158            // now launch the required amount of voices
159            for (int i = 0; i < voicesRequired; i++) {
160                VoiceIterator itNewVoice =
161                    LaunchVoice(pChannel, itNoteOnEvent, i, false, true, HandleKeyGroupConflicts);
162                if (!itNewVoice) continue;
163                itNewVoice.moveToEndOf(itNote->pActiveVoices);
164            }
165        }
166    
167        void Engine::TriggerReleaseVoices (
168            LinuxSampler::EngineChannel*  pEngineChannel,
169            RTList<Event>::Iterator&      itNoteOffEvent
170        ) {
171            EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
172            MidiKey* pKey = &pChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
173            // first, get total amount of required voices (dependant on amount of layers)
174            ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(itNoteOffEvent->Param.Note.Key);
175            if (!pRegion)
176                return;
177            const int voicesRequired = pRegion->Layers;
178            if (voicesRequired <= 0)
179                return;
180    
181            NoteIterator itNote = GetNotePool()->fromID(itNoteOffEvent->Param.Note.ID);
182            if (!itNote) {
183                dmsg(1,("gig::Engine: No Note object for triggering new release voices!\n"));
184                return;
185            }
186    
187            // MIDI note-on velocity is used instead of note-off velocity
188            itNoteOffEvent->Param.Note.Velocity = pKey->Velocity;
189    
190            // now launch the required amount of voices
191            for (int i = 0; i < voicesRequired; i++) {
192                VoiceIterator itNewVoice =
193                    LaunchVoice(pChannel, itNoteOffEvent, i, true, false, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
194                if (!itNewVoice) continue;
195                itNewVoice.moveToEndOf(itNote->pActiveVoices);
196            }
197        }
198    
199        Pool<Voice>::Iterator Engine::LaunchVoice (
200            LinuxSampler::EngineChannel*  pEngineChannel,
201            Pool<Event>::Iterator&        itNoteOnEvent,
202            int                           iLayer,
203            bool                          ReleaseTriggerVoice,
204            bool                          VoiceStealing,
205            bool                          HandleKeyGroupConflicts
206        ) {
207            EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
208            int MIDIKey = itNoteOnEvent->Param.Note.Key;
209            //EngineChannel::MidiKey* pKey  = &pChannel->pMIDIKeyInfo[MIDIKey];
210            ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(MIDIKey);
211    
212            // if nothing defined for this key
213            if (!pRegion) return Pool<Voice>::Iterator(); // nothing to do
214    
215            int iKeyGroup = pRegion->KeyGroup;
216            // only need to send a group event from the first voice in a layered region,
217            // as all layers in a region always belongs to the same key group
218            if (HandleKeyGroupConflicts && iLayer == 0) pChannel->HandleKeyGroupConflicts(iKeyGroup, itNoteOnEvent);
219    
220            Voice::type_t VoiceType = Voice::type_normal;
221    
222            // get current dimension values to select the right dimension region
223            //TODO: for stolen voices this dimension region selection block is processed twice, this should be changed
224            //FIXME: controller values for selecting the dimension region here are currently not sample accurate
225            uint DimValues[8] = { 0 };
226            for (int i = pRegion->Dimensions - 1; i >= 0; i--) {
227                switch (pRegion->pDimensionDefinitions[i].dimension) {
228                    case ::gig::dimension_samplechannel:
229                        DimValues[i] = 0; //TODO: we currently ignore this dimension
230                        break;
231                    case ::gig::dimension_layer:
232                        DimValues[i] = iLayer;
233                        break;
234                    case ::gig::dimension_velocity:
235                        DimValues[i] = itNoteOnEvent->Param.Note.Velocity;
236                        break;
237                    case ::gig::dimension_channelaftertouch:
238                        DimValues[i] = pChannel->ControllerTable[128];
239                        break;
240                    case ::gig::dimension_releasetrigger:
241                        VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;
242                        DimValues[i] = (uint) ReleaseTriggerVoice;
243                        break;
244                    case ::gig::dimension_keyboard:
245                        DimValues[i] = (uint) (pChannel->CurrentKeyDimension * pRegion->pDimensionDefinitions[i].zones);
246                        break;
247                    case ::gig::dimension_roundrobin:
248                        DimValues[i] = uint(*pChannel->pMIDIKeyInfo[MIDIKey].pRoundRobinIndex % pRegion->pDimensionDefinitions[i].zones); // RoundRobinIndex is incremented for each note on in this Region
249                        break;
250                    case ::gig::dimension_roundrobinkeyboard:
251                        DimValues[i] = uint(pChannel->RoundRobinIndex % pRegion->pDimensionDefinitions[i].zones); // RoundRobinIndex is incremented for each note on
252                        break;
253                    case ::gig::dimension_random:
254                        DimValues[i] = uint(Random() * pRegion->pDimensionDefinitions[i].zones);
255                        break;
256                    case ::gig::dimension_smartmidi:
257                        DimValues[i] = 0;
258                        break;
259                    case ::gig::dimension_modwheel:
260                        DimValues[i] = pChannel->ControllerTable[1];
261                        break;
262                    case ::gig::dimension_breath:
263                        DimValues[i] = pChannel->ControllerTable[2];
264                        break;
265                    case ::gig::dimension_foot:
266                        DimValues[i] = pChannel->ControllerTable[4];
267                        break;
268                    case ::gig::dimension_portamentotime:
269                        DimValues[i] = pChannel->ControllerTable[5];
270                        break;
271                    case ::gig::dimension_effect1:
272                        DimValues[i] = pChannel->ControllerTable[12];
273                        break;
274                    case ::gig::dimension_effect2:
275                        DimValues[i] = pChannel->ControllerTable[13];
276                        break;
277                    case ::gig::dimension_genpurpose1:
278                        DimValues[i] = pChannel->ControllerTable[16];
279                        break;
280                    case ::gig::dimension_genpurpose2:
281                        DimValues[i] = pChannel->ControllerTable[17];
282                        break;
283                    case ::gig::dimension_genpurpose3:
284                        DimValues[i] = pChannel->ControllerTable[18];
285                        break;
286                    case ::gig::dimension_genpurpose4:
287                        DimValues[i] = pChannel->ControllerTable[19];
288                        break;
289                    case ::gig::dimension_sustainpedal:
290                        DimValues[i] = pChannel->ControllerTable[64];
291                        break;
292                    case ::gig::dimension_portamento:
293                        DimValues[i] = pChannel->ControllerTable[65];
294                        break;
295                    case ::gig::dimension_sostenutopedal:
296                        DimValues[i] = pChannel->ControllerTable[66];
297                        break;
298                    case ::gig::dimension_softpedal:
299                        DimValues[i] = pChannel->ControllerTable[67];
300                        break;
301                    case ::gig::dimension_genpurpose5:
302                        DimValues[i] = pChannel->ControllerTable[80];
303                        break;
304                    case ::gig::dimension_genpurpose6:
305                        DimValues[i] = pChannel->ControllerTable[81];
306                        break;
307                    case ::gig::dimension_genpurpose7:
308                        DimValues[i] = pChannel->ControllerTable[82];
309                        break;
310                    case ::gig::dimension_genpurpose8:
311                        DimValues[i] = pChannel->ControllerTable[83];
312                        break;
313                    case ::gig::dimension_effect1depth:
314                        DimValues[i] = pChannel->ControllerTable[91];
315                        break;
316                    case ::gig::dimension_effect2depth:
317                        DimValues[i] = pChannel->ControllerTable[92];
318                        break;
319                    case ::gig::dimension_effect3depth:
320                        DimValues[i] = pChannel->ControllerTable[93];
321                        break;
322                    case ::gig::dimension_effect4depth:
323                        DimValues[i] = pChannel->ControllerTable[94];
324                        break;
325                    case ::gig::dimension_effect5depth:
326                        DimValues[i] = pChannel->ControllerTable[95];
327                        break;
328                    case ::gig::dimension_none:
329                        std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;
330                        break;
331                    default:
332                        std::cerr << "gig::Engine::LaunchVoice() Error: Unknown dimension\n" << std::flush;
333                }
334          }          }
     }  
   
     float Engine::Volume() {  
         return GlobalVolume;  
     }  
   
     void Engine::Volume(float f) {  
         GlobalVolume = f;  
     }  
335    
336      uint Engine::Channels() {          // return if this is a release triggered voice and there is no
337          return 2;          // releasetrigger dimension (could happen if an instrument
338      }          // change has occured between note on and off)
339            if (ReleaseTriggerVoice && !(VoiceType & Voice::type_release_trigger)) return Pool<Voice>::Iterator();
340    
341            NoteIterator itNote = GetNotePool()->fromID(itNoteOnEvent->Param.Note.ID);
342    
343            ::gig::DimensionRegion* pDimRgn;
344            if (!itNote->Format.Gig.DimMask) { // normal case ...
345                pDimRgn = pRegion->GetDimensionRegionByValue(DimValues);
346            } else { // some dimension zones were overridden (i.e. by instrument script) ...
347                dmsg(3,("trigger with dim mask=%d val=%d\n", itNote->Format.Gig.DimMask, itNote->Format.Gig.DimBits));
348                int index = pRegion->GetDimensionRegionIndexByValue(DimValues);
349                index &= ~itNote->Format.Gig.DimMask;
350                index |=  itNote->Format.Gig.DimBits & itNote->Format.Gig.DimMask;
351                pDimRgn = pRegion->pDimensionRegions[index & 255];
352            }
353            if (!pDimRgn) return Pool<Voice>::Iterator(); // error (could not resolve dimension region)
354    
355            // no need to continue if sample is silent
356            if (!pDimRgn->pSample || !pDimRgn->pSample->SamplesTotal) return Pool<Voice>::Iterator();
357            
358            dmsg(2,("sample -> \"%s\"\n", pDimRgn->pSample->pInfo->Name.c_str()));
359    
360      void Engine::SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel) {          // allocate a new voice for the key
361          AudioChannel* pChannel = pAudioOutputDevice->Channel(AudioDeviceChannel);          Pool<Voice>::Iterator itNewVoice = GetVoicePool()->allocAppend();
         if (!pChannel) throw AudioOutputException("Invalid audio output device channel " + ToString(AudioDeviceChannel));  
         switch (EngineAudioChannel) {  
             case 0: // left output channel  
                 pOutputLeft = pChannel->Buffer();  
                 AudioDeviceChannelLeft = AudioDeviceChannel;  
                 break;  
             case 1: // right output channel  
                 pOutputRight = pChannel->Buffer();  
                 AudioDeviceChannelRight = AudioDeviceChannel;  
                 break;  
             default:  
                 throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));  
         }  
     }  
   
     int Engine::OutputChannel(uint EngineAudioChannel) {  
         switch (EngineAudioChannel) {  
             case 0: // left channel  
                 return AudioDeviceChannelLeft;  
             case 1: // right channel  
                 return AudioDeviceChannelRight;  
             default:  
                 throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));  
         }  
     }  
362    
363      uint Engine::VoiceCount() {          int res = InitNewVoice (
364          return ActiveVoiceCount;                  pChannel, pDimRgn, itNoteOnEvent, VoiceType, iLayer,
365      }                  iKeyGroup, ReleaseTriggerVoice, VoiceStealing, itNewVoice
366            );
367            if (!res) return itNewVoice;
368    
369      uint Engine::VoiceCountMax() {          return Pool<Voice>::Iterator(); // no free voice or error
         return ActiveVoiceCountMax;  
370      }      }
371    
372      bool Engine::DiskStreamSupported() {      bool Engine::DiskStreamSupported() {
373          return true;          return true;
374      }      }
375    
     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";  
     }  
   
     String Engine::InstrumentFileName() {  
         return InstrumentFile;  
     }  
   
     int Engine::InstrumentIndex() {  
         return InstrumentIdx;  
     }  
   
     int Engine::InstrumentStatus() {  
         return InstrumentStat;  
     }  
   
376      String Engine::Description() {      String Engine::Description() {
377          return "Gigasampler Engine";          return "GigaSampler Format Engine";
378      }      }
379    
380      String Engine::Version() {      String Engine::Version() {
381          String s = "$Revision: 1.14 $";          String s = "$Revision$";
382          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
383      }      }
384    
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