/[svn]/linuxsampler/trunk/src/engines/gig/Engine.cpp
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revision 376 by senkov, Sat Feb 12 23:48:50 2005 UTC revision 2043 by persson, Sat Jan 9 09:37:01 2010 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) 2005-2009 Christian Schoenebeck                         *
7     *   Copyright (C) 2009 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"  
 #include "EGADSR.h"  
   
25  #include "Engine.h"  #include "Engine.h"
26    #include "EngineChannel.h"
 #if defined(__APPLE__)  
 # include <stdlib.h>  
 #else  
 # include <malloc.h>  
 #endif  
27    
28  namespace LinuxSampler { namespace gig {  namespace LinuxSampler { namespace gig {
29        Engine::Format Engine::GetEngineFormat() { return GIG; }
     InstrumentResourceManager Engine::Instruments;  
   
     Engine::Engine() {  
         pRIFF              = NULL;  
         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 Pool<Event>(MAX_EVENTS_PER_FRAGMENT);  
         pVoicePool         = new Pool<Voice>(MAX_AUDIO_VOICES);  
         pActiveKeys        = new Pool<uint>(128);  
         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 (uint i = 0; i < 128; i++) {  
             pMIDIKeyInfo[i].pActiveVoices  = new RTList<Voice>(pVoicePool);  
             pMIDIKeyInfo[i].KeyPressed     = false;  
             pMIDIKeyInfo[i].Active         = false;  
             pMIDIKeyInfo[i].ReleaseTrigger = false;  
             pMIDIKeyInfo[i].pEvents        = 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;  
   
         InstrumentIdx = -1;  
         InstrumentStat = -1;  
   
         AudioDeviceChannelLeft  = -1;  
         AudioDeviceChannelRight = -1;  
   
         ResetInternal();  
     }  
   
     Engine::~Engine() {  
         if (pDiskThread) {  
             dmsg(1,("Stopping disk thread..."));  
             pDiskThread->StopThread();  
             delete pDiskThread;  
             dmsg(1,("OK\n"));  
         }  
   
         if (pInstrument) Instruments.HandBack(pInstrument, this);  
   
         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];  
         }  
         if (pEvents)     delete pEvents;  
         if (pCCEvents)   delete pCCEvents;  
         if (pEventQueue) delete pEventQueue;  
         if (pEventPool)  delete pEventPool;  
         if (pVoicePool) {  
                 pVoicePool->clear();  
                 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]) free(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;  
         CurrentKeyDimension = 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);  
   
         // 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].itSelf         = Pool<uint>::Iterator();  
         }  
   
         // reset all key groups  
         map<uint,uint*>::iterator iter = ActiveKeyGroups.begin();  
         for (; iter != ActiveKeyGroups.end(); iter++) iter->second = NULL;  
   
         // reset all voices  
         for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {  
             iterVoice->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;  
   
         InstrumentIdxName = pInstrument->pInfo->Name;  
         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();  
   
         // 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 to 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);  
             }  
         }  
     }  
   
     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;  
         }  
   
   
         // 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 = pActiveKeys->first();  
             RTList<uint>::Iterator end    = pActiveKeys->end();  
             for(; iuiKey != end; ++iuiKey) {  
                 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(itEvent);  
                         break;  
                     case Event::type_note_off:  
                         dmsg(5,("Engine: Note off received\n"));  
                         ProcessNoteOff(itEvent);  
                         break;  
                     case Event::type_control_change:  
                         dmsg(5,("Engine: MIDI CC received\n"));  
                         ProcessControlChange(itEvent);  
                         break;  
                     case Event::type_pitchbend:  
                         dmsg(5,("Engine: Pitchbend received\n"));  
                         ProcessPitchbend(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 = pActiveKeys->first();  
             RTList<uint>::Iterator end    = pActiveKeys->end();  
             while (iuiKey != end) { // iterate through all active keys  
                 midi_key_info_t* pKey = &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(itVoice); // remove voice from the list of active voices  
                     }  
                 }  
             }  
         }  
   
   
         // now render all postponed voices from voice stealing  
         {  
             RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();  
             RTList<Event>::Iterator end               = pVoiceStealingQueue->end();  
             for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {  
                 Pool<Voice>::Iterator itNewVoice = LaunchVoice(itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false);  
                 if (itNewVoice) {  
                     for (; itNewVoice; itNewVoice = itNewVoice->itChildVoice) {  
                         itNewVoice->Render(Samples);  
                         if (itNewVoice->IsActive()) active_voices++; // still active  
                         else { // voice reached end, is now inactive  
                             FreeVoice(itNewVoice); // remove voice from the list of active voices  
                         }  
                     }  
                 }  
                 else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));  
             }  
         }  
         // reset voice stealing for the new fragment  
         pVoiceStealingQueue->clear();  
         itLastStolenVoice = RTList<Voice>::Iterator();  
         iuiLastStolenKey  = RTList<uint>::Iterator();  
   
   
         // free all keys which have no active voices left  
         {  
             RTList<uint>::Iterator iuiKey = pActiveKeys->first();  
             RTList<uint>::Iterator end    = pActiveKeys->end();  
             while (iuiKey != end) { // iterate through all active keys  
                 midi_key_info_t* pKey = &pMIDIKeyInfo[*iuiKey];  
                 ++iuiKey;  
                 if (pKey->pActiveVoices->isEmpty()) FreeKey(pKey);  
                 #if DEVMODE  
                 else { // FIXME: should be removed before the final release (purpose: just a sanity check for debugging)  
                     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  
                         if (itVoice->itKillEvent) {  
                             dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));  
                         }  
                     }  
                 }  
                 #endif // DEVMODE  
             }  
         }  
   
   
         // 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 itNoteOnEvent - key, velocity and time stamp of the event  
      */  
     void Engine::ProcessNoteOn(Pool<Event>::Iterator& itNoteOnEvent) {  
   
         const int key = itNoteOnEvent->Param.Note.Key;  
   
         // Change key dimension value if key is in keyswitching area  
         if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)  
             CurrentKeyDimension = ((key - pInstrument->DimensionKeyRange.low) * 128) /  
                 (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);  
   
         midi_key_info_t* pKey = &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 && !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(itNoteOnEventOnKeyList, 0, false, true);  
     }  
   
     /**  
      *  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 itNoteOffEvent - key, velocity and time stamp of the event  
      */  
     void Engine::ProcessNoteOff(Pool<Event>::Iterator& itNoteOffEvent) {  
         midi_key_info_t* pKey = &pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];  
   
         pKey->KeyPressed = false; // the MIDI key was now released  
   
         // release voices on this key if needed  
         if (pKey->Active && !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(itNoteOffEventOnKeyList, 0, true, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples  
             pKey->ReleaseTrigger = false;  
         }  
     }  
   
     /**  
      *  Moves pitchbend event from the general (input) event list to the pitch  
      *  event list.  
      *  
      *  @param itPitchbendEvent - absolute pitch value and time stamp of the event  
      */  
     void Engine::ProcessPitchbend(Pool<Event>::Iterator& itPitchbendEvent) {  
         this->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value  
         itPitchbendEvent.moveToEndOf(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 itNoteOnEvent       - 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 the voice wasn't triggered (for example when no region is  
      *           defined for the given key).  
      */  
     Pool<Voice>::Iterator Engine::LaunchVoice(Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing) {  
         midi_key_info_t* pKey = &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(itNoteOnEvent, this->Pitch, this->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 = &ActiveKeyGroups[itNewVoice->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  
                         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 = 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 = pInstrument->GetRegion(itNoteOnEvent->Param.Note.Key);  
             if (!pRegion) return Pool<Voice>::Iterator(); // nothing defined for this MIDI key, so no voice needed  
             int voicesRequired = pRegion->Layers;  
   
             // now steal the (remaining) amount of voices  
             for (int i = iLayer; i < voicesRequired; i++)  
                 StealVoice(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"));  
         }  
   
         return Pool<Voice>::Iterator(); // 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 itNoteOnEvent - key, velocity and time stamp of the event  
      */  
     void Engine::StealVoice(Pool<Event>::Iterator& itNoteOnEvent) {  
         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 = &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 = &pMIDIKeyInfo[*iuiLastStolenKey];  
                         itOldestVoice = itLastStolenVoice;  
                         ++itOldestVoice;  
                         if (!itOldestVoice) {  
                             iuiOldestKey = iuiLastStolenKey;  
                             ++iuiOldestKey;  
                             if (iuiOldestKey) {  
                                 midi_key_info_t* pOldestKey = &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 = pActiveKeys->first();  
                         midi_key_info_t* pOldestKey = &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;  
                 }  
             }  
   
             //FIXME: can be removed, just a sanity check for debugging  
             if (!itOldestVoice->IsActive()) dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));  
   
             // now kill the selected voice  
             itOldestVoice->Kill(itNoteOnEvent);  
             // remember which voice on which key we stole, so we can simply proceed for the next voice stealing  
             this->itLastStolenVoice = itOldestVoice;  
             this->iuiLastStolenKey = iuiOldestKey;  
         }  
         else dmsg(1,("Event pool emtpy!\n"));  
     }  
   
     /**  
      *  Removes the given voice from the MIDI key's list of active voices.  
      *  This method will be called when a voice went inactive, e.g. because  
      *  it finished to playback its sample, finished its release stage or  
      *  just was killed.  
      *  
      *  @param itVoice - points to the voice to be freed  
      */  
     void Engine::FreeVoice(Pool<Voice>::Iterator& itVoice) {  
         if (itVoice) {  
             midi_key_info_t* pKey = &pMIDIKeyInfo[itVoice->MIDIKey];  
   
             uint keygroup = itVoice->KeyGroup;  
   
             // free the voice object  
             pVoicePool->free(itVoice);  
   
             // if no other voices left and member of a key group, remove from key group  
             if (pKey->pActiveVoices->isEmpty() && keygroup) {  
                 uint** ppKeyGroup = &ActiveKeyGroups[keygroup];  
                 if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group  
             }  
         }  
         else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush;  
     }  
   
     /**  
      *  Called when there's no more voice left on a key, this call will  
      *  update the key info respectively.  
      *  
      *  @param pKey - key which is now inactive  
      */  
     void Engine::FreeKey(midi_key_info_t* pKey) {  
         if (pKey->pActiveVoices->isEmpty()) {  
             pKey->Active = false;  
             pActiveKeys->free(pKey->itSelf); // remove key from list of active keys  
             pKey->itSelf = RTList<uint>::Iterator();  
             pKey->ReleaseTrigger = false;  
             pKey->pEvents->clear();  
             dmsg(3,("Key has no more voices now\n"));  
         }  
         else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n"));  
     }  
30    
31      /**      /**
32       *  Reacts on supported control change commands (e.g. pitch bend wheel,       *  Reacts on supported control change commands (e.g. pitch bend wheel,
33       *  modulation wheel, aftertouch).       *  modulation wheel, aftertouch).
34       *       *
35         *  @param pEngineChannel - engine channel on which this event occured on
36       *  @param itControlChangeEvent - controller, value and time stamp of the event       *  @param itControlChangeEvent - controller, value and time stamp of the event
37       */       */
38      void Engine::ProcessControlChange(Pool<Event>::Iterator& itControlChangeEvent) {      void Engine::ProcessControlChange (
39            LinuxSampler::EngineChannel*  pEngineChannel,
40            Pool<Event>::Iterator&        itControlChangeEvent
41        ) {
42          dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));          dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
43    
44          switch (itControlChangeEvent->Param.CC.Controller) {          EngineChannel* pChannel = dynamic_cast<EngineChannel*>(pEngineChannel);
45              case 64: {          // handle the "control triggered" MIDI rule: a control change
46                  if (itControlChangeEvent->Param.CC.Value >= 64 && !SustainPedal) {          // event can trigger a new note on or note off event
47                      dmsg(4,("PEDAL DOWN\n"));          if (pChannel->pInstrument) {
48                      SustainPedal = true;  
49                ::gig::MidiRule* rule;
50                      // cancel release process of voices if necessary              for (int i = 0 ; (rule = pChannel->pInstrument->GetMidiRule(i)) ; i++) {
51                      RTList<uint>::Iterator iuiKey = pActiveKeys->first();  
52                      if (iuiKey) {                  if (::gig::MidiRuleCtrlTrigger* ctrlTrigger =
53                          itControlChangeEvent->Type = Event::type_cancel_release; // transform event type                      dynamic_cast< ::gig::MidiRuleCtrlTrigger*>(rule)) {
54                          while (iuiKey) {                      if (itControlChangeEvent->Param.CC.Controller ==
55                              midi_key_info_t* pKey = &pMIDIKeyInfo[*iuiKey];                          ctrlTrigger->ControllerNumber) {
56                              ++iuiKey;  
57                              if (!pKey->KeyPressed) {                          uint8_t oldCCValue = pChannel->ControllerTable[
58                                  RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();                              itControlChangeEvent->Param.CC.Controller];
59                                  if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list                          uint8_t newCCValue = itControlChangeEvent->Param.CC.Value;
60                                  else dmsg(1,("Event pool emtpy!\n"));  
61                              }                          for (int i = 0 ; i < ctrlTrigger->Triggers ; i++) {
62                          }                              ::gig::MidiRuleCtrlTrigger::trigger_t* pTrigger =
63                      }                                    &ctrlTrigger->pTriggers[i];
64                  }  
65                  if (itControlChangeEvent->Param.CC.Value < 64 && SustainPedal) {                              // check if the controller has passed the
66                      dmsg(4,("PEDAL UP\n"));                              // trigger point in the right direction
67                      SustainPedal = false;                              if ((pTrigger->Descending &&
68                                     oldCCValue > pTrigger->TriggerPoint &&
69                      // release voices if their respective key is not pressed                                   newCCValue <= pTrigger->TriggerPoint) ||
70                      RTList<uint>::Iterator iuiKey = pActiveKeys->first();                                  (!pTrigger->Descending &&
71                      if (iuiKey) {                                   oldCCValue < pTrigger->TriggerPoint &&
72                          itControlChangeEvent->Type = Event::type_release; // transform event type                                   newCCValue >= pTrigger->TriggerPoint)) {
73                          while (iuiKey) {  
74                              midi_key_info_t* pKey = &pMIDIKeyInfo[*iuiKey];                                  RTList<Event>::Iterator itNewEvent = pGlobalEvents->allocAppend();
75                              ++iuiKey;                                  if (itNewEvent) {
76                              if (!pKey->KeyPressed) {                                      *itNewEvent = *itControlChangeEvent;
77                                  RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();                                      itNewEvent->Param.Note.Key = pTrigger->Key;
78                                  if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list  
79                                        if (pTrigger->NoteOff || pTrigger->Velocity == 0) {
80                                            itNewEvent->Type = Event::type_note_off;
81                                            itNewEvent->Param.Note.Velocity = 100;
82    
83                                            ProcessNoteOff(pEngineChannel, itNewEvent);
84                                        } else {
85                                            itNewEvent->Type = Event::type_note_on;
86                                            //TODO: if Velocity is 255, the triggered velocity should
87                                            // depend on how fast the controller is moving
88                                            itNewEvent->Param.Note.Velocity =
89                                                pTrigger->Velocity == 255 ? 100 :
90                                                pTrigger->Velocity;
91    
92                                            ProcessNoteOn(pEngineChannel, itNewEvent);
93                                        }
94                                    }
95                                  else dmsg(1,("Event pool emtpy!\n"));                                  else dmsg(1,("Event pool emtpy!\n"));
96                              }                              }
97                          }                          }
98                      }                      }
99                  }                  }
                 break;  
             }  
         }  
   
         // update controller value in the engine's controller table  
         ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;  
   
         // move event from the unsorted event list to the control change event list  
         itControlChangeEvent.moveToEndOf(pCCEvents);  
     }  
   
     /**  
      *  Reacts on MIDI system exclusive messages.  
      *  
      *  @param itSysexEvent - sysex data size and time stamp of the sysex event  
      */  
     void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) {  
         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;  
100              }              }
101          }          }
102    
103          free_sysex_data: // finally free sysex data          // update controller value in the engine channel's controller table
104          pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);          pChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
     }  
105    
106      /**          ProcessHardcodedControllers(pEngineChannel, itControlChangeEvent);
      * 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;  
     }  
107    
108      /**          // handle FX send controllers
109       * Allows to tune each of the twelve semitones of an octave.          ProcessFxSendControllers(pChannel, itControlChangeEvent);
      *  
      * @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  
110      }      }
111    
112      /**      DiskThread* Engine::CreateDiskThread() {
113       * Initialize the parameter sequence for the modulation destination given by          return new DiskThread (
114       * by 'dst' with the constant value given by val.              iMaxDiskStreams,
115       */              ((pAudioOutputDevice->MaxSamplesPerCycle() << CONFIG_MAX_PITCH) << 1) + 6, //FIXME: assuming stereo
116      void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) {              &instruments
117          int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle();          );
118          float* m = &pSynthesisParameters[dst][0];      }
119          for (int i = 0; i < maxsamples; i += 4) {  
120             m[i]   = val;      void Engine::TriggerNewVoices (
121             m[i+1] = val;          LinuxSampler::EngineChannel* pEngineChannel,
122             m[i+2] = val;          RTList<Event>::Iterator&     itNoteOnEvent,
123             m[i+3] = val;          bool                         HandleKeyGroupConflicts
124        ) {
125            EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
126            // first, get total amount of required voices (dependant on amount of layers)
127            ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(itNoteOnEvent->Param.Note.Key);
128            if (pRegion && !RegionSuspended(pRegion)) {
129                int voicesRequired = pRegion->Layers;
130                // now launch the required amount of voices
131                for (int i = 0; i < voicesRequired; i++)
132                    LaunchVoice(pChannel, itNoteOnEvent, i, false, true, HandleKeyGroupConflicts);
133          }          }
134      }      }
135    
136      float Engine::Volume() {      void Engine::TriggerReleaseVoices (
137          return GlobalVolume;          LinuxSampler::EngineChannel*  pEngineChannel,
138      }          RTList<Event>::Iterator&      itNoteOffEvent
139        ) {
140      void Engine::Volume(float f) {          EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
141          GlobalVolume = f;          MidiKey* pKey = &pChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
142      }          // first, get total amount of required voices (dependant on amount of layers)
143            ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(itNoteOffEvent->Param.Note.Key);
144            if (pRegion) {
145                int voicesRequired = pRegion->Layers;
146    
147      uint Engine::Channels() {              // MIDI note-on velocity is used instead of note-off velocity
148          return 2;              itNoteOffEvent->Param.Note.Velocity = pKey->Velocity;
     }  
149    
150      void Engine::SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel) {              // now launch the required amount of voices
151          AudioChannel* pChannel = pAudioOutputDevice->Channel(AudioDeviceChannel);              for (int i = 0; i < voicesRequired; i++)
152          if (!pChannel) throw AudioOutputException("Invalid audio output device channel " + ToString(AudioDeviceChannel));                  LaunchVoice(pChannel, itNoteOffEvent, i, true, false, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
         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));  
153          }          }
154      }      }
155    
156      int Engine::OutputChannel(uint EngineAudioChannel) {      Pool<Voice>::Iterator Engine::LaunchVoice (
157          switch (EngineAudioChannel) {          LinuxSampler::EngineChannel*  pEngineChannel,
158              case 0: // left channel          Pool<Event>::Iterator&        itNoteOnEvent,
159                  return AudioDeviceChannelLeft;          int                           iLayer,
160              case 1: // right channel          bool                          ReleaseTriggerVoice,
161                  return AudioDeviceChannelRight;          bool                          VoiceStealing,
162              default:          bool                          HandleKeyGroupConflicts
163                  throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel));      ) {
164            EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
165            int MIDIKey = itNoteOnEvent->Param.Note.Key;
166            EngineChannel::MidiKey* pKey  = &pChannel->pMIDIKeyInfo[MIDIKey];
167            ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(MIDIKey);
168    
169            // if nothing defined for this key
170            if (!pRegion) return Pool<Voice>::Iterator(); // nothing to do
171    
172            // only mark the first voice of a layered voice (group) to be in a
173            // key group, so the layered voices won't kill each other
174            int iKeyGroup = (iLayer == 0 && !ReleaseTriggerVoice) ? pRegion->KeyGroup : 0;
175    
176            if (HandleKeyGroupConflicts) pChannel->HandleKeyGroupConflicts(iKeyGroup, itNoteOnEvent);
177    
178            Voice::type_t VoiceType = Voice::type_normal;
179    
180            // get current dimension values to select the right dimension region
181            //TODO: for stolen voices this dimension region selection block is processed twice, this should be changed
182            //FIXME: controller values for selecting the dimension region here are currently not sample accurate
183            uint DimValues[8] = { 0 };
184            for (int i = pRegion->Dimensions - 1; i >= 0; i--) {
185                switch (pRegion->pDimensionDefinitions[i].dimension) {
186                    case ::gig::dimension_samplechannel:
187                        DimValues[i] = 0; //TODO: we currently ignore this dimension
188                        break;
189                    case ::gig::dimension_layer:
190                        DimValues[i] = iLayer;
191                        break;
192                    case ::gig::dimension_velocity:
193                        DimValues[i] = itNoteOnEvent->Param.Note.Velocity;
194                        break;
195                    case ::gig::dimension_channelaftertouch:
196                        DimValues[i] = pChannel->ControllerTable[128];
197                        break;
198                    case ::gig::dimension_releasetrigger:
199                        VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;
200                        DimValues[i] = (uint) ReleaseTriggerVoice;
201                        break;
202                    case ::gig::dimension_keyboard:
203                        DimValues[i] = (uint) (pChannel->CurrentKeyDimension * pRegion->pDimensionDefinitions[i].zones);
204                        break;
205                    case ::gig::dimension_roundrobin:
206                        DimValues[i] = uint(*pChannel->pMIDIKeyInfo[MIDIKey].pRoundRobinIndex % pRegion->pDimensionDefinitions[i].zones); // RoundRobinIndex is incremented for each note on in this Region
207                        break;
208                    case ::gig::dimension_roundrobinkeyboard:
209                        DimValues[i] = uint(pChannel->RoundRobinIndex % pRegion->pDimensionDefinitions[i].zones); // RoundRobinIndex is incremented for each note on
210                        break;
211                    case ::gig::dimension_random:
212                        RandomSeed   = RandomSeed * 1103515245 + 12345; // classic pseudo random number generator
213                        DimValues[i] = uint(RandomSeed / 4294967296.0f * pRegion->pDimensionDefinitions[i].zones);
214                        break;
215                    case ::gig::dimension_modwheel:
216                        DimValues[i] = pChannel->ControllerTable[1];
217                        break;
218                    case ::gig::dimension_breath:
219                        DimValues[i] = pChannel->ControllerTable[2];
220                        break;
221                    case ::gig::dimension_foot:
222                        DimValues[i] = pChannel->ControllerTable[4];
223                        break;
224                    case ::gig::dimension_portamentotime:
225                        DimValues[i] = pChannel->ControllerTable[5];
226                        break;
227                    case ::gig::dimension_effect1:
228                        DimValues[i] = pChannel->ControllerTable[12];
229                        break;
230                    case ::gig::dimension_effect2:
231                        DimValues[i] = pChannel->ControllerTable[13];
232                        break;
233                    case ::gig::dimension_genpurpose1:
234                        DimValues[i] = pChannel->ControllerTable[16];
235                        break;
236                    case ::gig::dimension_genpurpose2:
237                        DimValues[i] = pChannel->ControllerTable[17];
238                        break;
239                    case ::gig::dimension_genpurpose3:
240                        DimValues[i] = pChannel->ControllerTable[18];
241                        break;
242                    case ::gig::dimension_genpurpose4:
243                        DimValues[i] = pChannel->ControllerTable[19];
244                        break;
245                    case ::gig::dimension_sustainpedal:
246                        DimValues[i] = pChannel->ControllerTable[64];
247                        break;
248                    case ::gig::dimension_portamento:
249                        DimValues[i] = pChannel->ControllerTable[65];
250                        break;
251                    case ::gig::dimension_sostenutopedal:
252                        DimValues[i] = pChannel->ControllerTable[66];
253                        break;
254                    case ::gig::dimension_softpedal:
255                        DimValues[i] = pChannel->ControllerTable[67];
256                        break;
257                    case ::gig::dimension_genpurpose5:
258                        DimValues[i] = pChannel->ControllerTable[80];
259                        break;
260                    case ::gig::dimension_genpurpose6:
261                        DimValues[i] = pChannel->ControllerTable[81];
262                        break;
263                    case ::gig::dimension_genpurpose7:
264                        DimValues[i] = pChannel->ControllerTable[82];
265                        break;
266                    case ::gig::dimension_genpurpose8:
267                        DimValues[i] = pChannel->ControllerTable[83];
268                        break;
269                    case ::gig::dimension_effect1depth:
270                        DimValues[i] = pChannel->ControllerTable[91];
271                        break;
272                    case ::gig::dimension_effect2depth:
273                        DimValues[i] = pChannel->ControllerTable[92];
274                        break;
275                    case ::gig::dimension_effect3depth:
276                        DimValues[i] = pChannel->ControllerTable[93];
277                        break;
278                    case ::gig::dimension_effect4depth:
279                        DimValues[i] = pChannel->ControllerTable[94];
280                        break;
281                    case ::gig::dimension_effect5depth:
282                        DimValues[i] = pChannel->ControllerTable[95];
283                        break;
284                    case ::gig::dimension_none:
285                        std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;
286                        break;
287                    default:
288                        std::cerr << "gig::Engine::LaunchVoice() Error: Unknown dimension\n" << std::flush;
289                }
290          }          }
     }  
291    
292      uint Engine::VoiceCount() {          // return if this is a release triggered voice and there is no
293          return ActiveVoiceCount;          // releasetrigger dimension (could happen if an instrument
294      }          // change has occured between note on and off)
295            if (ReleaseTriggerVoice && VoiceType != Voice::type_release_trigger) return Pool<Voice>::Iterator();
296    
297      uint Engine::VoiceCountMax() {          ::gig::DimensionRegion* pDimRgn = pRegion->GetDimensionRegionByValue(DimValues);
         return ActiveVoiceCountMax;  
     }  
   
     bool Engine::DiskStreamSupported() {  
         return true;  
     }  
298    
299      uint Engine::DiskStreamCount() {          // no need to continue if sample is silent
300          return (pDiskThread) ? pDiskThread->ActiveStreamCount : 0;          if (!pDimRgn->pSample || !pDimRgn->pSample->SamplesTotal) return Pool<Voice>::Iterator();
     }  
301    
302      uint Engine::DiskStreamCountMax() {          // allocate a new voice for the key
303          return (pDiskThread) ? pDiskThread->ActiveStreamCountMax : 0;          Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
     }  
   
     String Engine::DiskStreamBufferFillBytes() {  
         return pDiskThread->GetBufferFillBytes();  
     }  
   
     String Engine::DiskStreamBufferFillPercentage() {  
         return pDiskThread->GetBufferFillPercentage();  
     }  
   
     String Engine::EngineName() {  
         return "GigEngine";  
     }  
   
     String Engine::InstrumentFileName() {  
         return InstrumentFile;  
     }  
304    
305      String Engine::InstrumentName() {          int res = InitNewVoice (
306          return InstrumentIdxName;                  pChannel, pDimRgn, itNoteOnEvent, VoiceType, iLayer,
307      }                  iKeyGroup, ReleaseTriggerVoice, VoiceStealing, itNewVoice
308            );
309            if (!res) return itNewVoice;
310    
311      int Engine::InstrumentIndex() {          return Pool<Voice>::Iterator(); // no free voice or error
         return InstrumentIdx;  
312      }      }
313    
314      int Engine::InstrumentStatus() {      bool Engine::DiskStreamSupported() {
315          return InstrumentStat;          return true;
316      }      }
317    
318      String Engine::Description() {      String Engine::Description() {
319          return "Gigasampler Engine";          return "GigaSampler Format Engine";
320      }      }
321    
322      String Engine::Version() {      String Engine::Version() {
323          String s = "$Revision: 1.24 $";          String s = "$Revision: 1.107 $";
324          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
325      }      }
326    
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