/[svn]/linuxsampler/trunk/src/engines/gig/Engine.cpp
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revision 64 by schoenebeck, Thu May 6 20:06:20 2004 UTC revision 2494 by schoenebeck, Wed Jan 1 17:48:01 2014 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *   *   Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck    *
6     *   Copyright (C) 2005-2008 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    
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;  
         pEventQueue        = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT);  
         pEventPool         = new RTELMemoryPool<Event>(MAX_EVENTS_PER_FRAGMENT);  
         pVoicePool         = new RTELMemoryPool<Voice>(MAX_AUDIO_VOICES);  
         pActiveKeys        = new RTELMemoryPool<uint>(128);  
         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].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  
   
         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 (pEventGenerator) delete pEventGenerator;  
         if (pSynthesisParameters[0]) delete[] pSynthesisParameters[0];  
     }  
   
     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;  
   
         // 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].pSelf      = 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);  
         }  
   
         // request gig instrument from instrument manager  
         try {  
             instrument_id_t instrid;  
             instrid.FileName    = FileName;  
             instrid.iInstrument = Instrument;  
             pInstrument = Instruments.Borrow(instrid, this);  
             if (!pInstrument) {  
                 dmsg(1,("no instrument loaded!!!\n"));  
                 exit(EXIT_FAILURE);  
             }  
         }  
         catch (RIFF::Exception e) {  
             String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message;  
             throw LinuxSamplerException(msg);  
         }  
         catch (InstrumentResourceManagerException e) {  
             String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message();  
             throw LinuxSamplerException(msg);  
         }  
         catch (...) {  
             throw LinuxSamplerException("gig::Engine error: Failed to load instrument, cause: Unknown exception while trying to parse gig file.");  
         }  
   
         // 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;  
         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);  
         }  
   
         // (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;  
             pVoice->SetOutput(pAudioOut);  
             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();  
   
         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);  
         }  
     }  
   
     /**  
      *  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();  
         }  
   
         // 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,("Audio Thread: Note on received\n"));  
                     ProcessNoteOn(pEvent);  
                     break;  
                 case Event::type_note_off:  
                     dmsg(5,("Audio Thread: Note off received\n"));  
                     ProcessNoteOff(pEvent);  
                     break;  
                 case Event::type_control_change:  
                     dmsg(5,("Audio Thread: MIDI CC received\n"));  
                     ProcessControlChange(pEvent);  
                     break;  
                 case Event::type_pitchbend:  
                     dmsg(5,("Audio Thread: Pitchbend received\n"));  
                     ProcessPitchbend(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  
                     KillVoice(pVoice); // remove voice from the list of active voices  
                 }  
             }  
             pKey->pEvents->clear(); // free all events on the key  
         }  
   
   
         // 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.Key      = Key;  
         event.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.Key      = Key;  
         event.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.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.Controller = Controller;  
         event.Value      = Value;  
         if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event);  
         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->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) {  
             pNoteOnEvent->Type = Event::type_cancel_release; // transform event type  
             pEvents->move(pNoteOnEvent, pKey->pEvents); // move event to the key's own event list  
         }  
   
         // allocate a new voice for the key  
         Voice* pNewVoice = pKey->pActiveVoices->alloc();  
         if (pNewVoice) {  
             // launch the new voice  
             if (pNewVoice->Trigger(pNoteOnEvent, this->Pitch, this->pInstrument) < 0) {  
                 dmsg(1,("Triggering new voice failed!\n"));  
                 pKey->pActiveVoices->free(pNewVoice);  
             }  
             else if (!pKey->Active) { // mark as active key  
                 pKey->Active = true;  
                 pKey->pSelf  = pActiveKeys->alloc();  
                 *pKey->pSelf = pNoteOnEvent->Key;  
             }  
         }  
         else std::cerr << "No free voice!" << std::endl << std::flush;  
     }  
   
     /**  
      *  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->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  
             pEvents->move(pNoteOffEvent, pKey->pEvents); // move event to the key's own event list  
         }  
     }  
   
     /**  
      *  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->Pitch; // store current pitch value  
         pEvents->move(pPitchbendEvent, pSynthesisEvents[Event::destination_vco]);  
     }  
   
     /**  
      *  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::KillVoice(Voice* pVoice) {  
         if (pVoice) {  
             if (pVoice->IsActive()) pVoice->Kill();  
   
             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()) {  
                 pKey->Active = false;  
                 pActiveKeys->free(pKey->pSelf); // remove key from list of active keys  
                 pKey->pSelf = NULL;  
                 dmsg(3,("Key has no more voices now\n"));  
             }  
         }  
         else std::cerr << "Couldn't release voice! (pVoice == NULL)\n" << std::flush;  
     }  
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 pControlChangeEvent - controller, value and time stamp of the event       *  @param pEngineChannel - engine channel on which this event occured on
36         *  @param itControlChangeEvent - controller, value and time stamp of the event
37       */       */
38      void Engine::ProcessControlChange(Event* pControlChangeEvent) {      void Engine::ProcessControlChange (
39          dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", pControlChangeEvent->Controller, pControlChangeEvent->Value));          LinuxSampler::EngineChannel*  pEngineChannel,
40            Pool<Event>::Iterator&        itControlChangeEvent
41          switch (pControlChangeEvent->Controller) {      ) {
42              case 64: {          dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
43                  if (pControlChangeEvent->Value >= 64 && !SustainPedal) {  
44                      dmsg(4,("PEDAL DOWN\n"));          EngineChannel* pChannel = dynamic_cast<EngineChannel*>(pEngineChannel);
45                      SustainPedal = true;          // handle the "control triggered" MIDI rule: a control change
46            // event can trigger a new note on or note off event
47                      // cancel release process of voices if necessary          if (pChannel->pInstrument) {
48                      uint* piKey = pActiveKeys->first();  
49                      if (piKey) {              ::gig::MidiRule* rule;
50                          pControlChangeEvent->Type = Event::type_cancel_release; // transform event type              for (int i = 0 ; (rule = pChannel->pInstrument->GetMidiRule(i)) ; i++) {
51                          while (piKey) {  
52                              midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];                  if (::gig::MidiRuleCtrlTrigger* ctrlTrigger =
53                              pActiveKeys->set_current(piKey);                      dynamic_cast< ::gig::MidiRuleCtrlTrigger*>(rule)) {
54                              piKey = pActiveKeys->next();                      if (itControlChangeEvent->Param.CC.Controller ==
55                              if (!pKey->KeyPressed) {                          ctrlTrigger->ControllerNumber) {
56                                  Event* pNewEvent = pKey->pEvents->alloc();  
57                                  if (pNewEvent) *pNewEvent = *pControlChangeEvent; // copy event to the key's own event list                          uint8_t oldCCValue = pChannel->ControllerTable[
58                                itControlChangeEvent->Param.CC.Controller];
59                            uint8_t newCCValue = itControlChangeEvent->Param.CC.Value;
60    
61                            for (int i = 0 ; i < ctrlTrigger->Triggers ; i++) {
62                                ::gig::MidiRuleCtrlTrigger::trigger_t* pTrigger =
63                                      &ctrlTrigger->pTriggers[i];
64    
65                                // check if the controller has passed the
66                                // trigger point in the right direction
67                                if ((pTrigger->Descending &&
68                                     oldCCValue > pTrigger->TriggerPoint &&
69                                     newCCValue <= pTrigger->TriggerPoint) ||
70                                    (!pTrigger->Descending &&
71                                     oldCCValue < pTrigger->TriggerPoint &&
72                                     newCCValue >= pTrigger->TriggerPoint)) {
73    
74                                    RTList<Event>::Iterator itNewEvent = pGlobalEvents->allocAppend();
75                                    if (itNewEvent) {
76                                        *itNewEvent = *itControlChangeEvent;
77                                        itNewEvent->Param.Note.Key = pTrigger->Key;
78    
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                  }                  }
                 if (pControlChangeEvent->Value < 64 && SustainPedal) {  
                     dmsg(4,("PEDAL UP\n"));  
                     SustainPedal = false;  
   
                     // release voices if their respective key is not pressed  
                     uint* piKey = pActiveKeys->first();  
                     if (piKey) {  
                         pControlChangeEvent->Type = Event::type_release; // transform event type  
                         while (piKey) {  
                             midi_key_info_t* pKey = &pMIDIKeyInfo[*piKey];  
                             pActiveKeys->set_current(piKey);  
                             piKey = pActiveKeys->next();  
                             if (!pKey->KeyPressed) {  
                                 Event* pNewEvent = pKey->pEvents->alloc();  
                                 if (pNewEvent) *pNewEvent = *pControlChangeEvent; // copy event to the key's own event list  
                                 else dmsg(1,("Event pool emtpy!\n"));  
                             }  
                         }  
                     }  
                 }  
                 break;  
100              }              }
101          }          }
102    
103          // update controller value in the engine's controller table          // update controller value in the engine channel's controller table
104          ControllerTable[pControlChangeEvent->Controller] = pControlChangeEvent->Value;          pChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
105    
106          // move event from the unsorted event list to the control change event list          ProcessHardcodedControllers(pEngineChannel, itControlChangeEvent);
         pEvents->move(pControlChangeEvent, pCCEvents);  
     }  
   
     /**  
      * Initialize the parameter sequence for the modulation destination given by  
      * by 'dst' with the constant value given by val.  
      */  
     void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) {  
         int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle();  
         for (int i = 0; i < maxsamples; i++) pSynthesisParameters[dst][i] = val;  
     }  
107    
108      float Engine::Volume() {          // handle FX send controllers
109          return GlobalVolume;          ProcessFxSendControllers(pChannel, itControlChangeEvent);
110      }      }
111    
112      void Engine::Volume(float f) {      DiskThread* Engine::CreateDiskThread() {
113          GlobalVolume = f;          return new DiskThread (
114      }              iMaxDiskStreams,
115                ((pAudioOutputDevice->MaxSamplesPerCycle() << CONFIG_MAX_PITCH) << 1) + 6, //FIXME: assuming stereo
116                &instruments
117            );
118        }
119    
120        void Engine::TriggerNewVoices (
121            LinuxSampler::EngineChannel* pEngineChannel,
122            RTList<Event>::Iterator&     itNoteOnEvent,
123            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        void Engine::TriggerReleaseVoices (
137            LinuxSampler::EngineChannel*  pEngineChannel,
138            RTList<Event>::Iterator&      itNoteOffEvent
139        ) {
140            EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
141            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                // MIDI note-on velocity is used instead of note-off velocity
148                itNoteOffEvent->Param.Note.Velocity = pKey->Velocity;
149    
150                // now launch the required amount of voices
151                for (int i = 0; i < voicesRequired; i++)
152                    LaunchVoice(pChannel, itNoteOffEvent, i, true, false, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples
153            }
154        }
155    
156        Pool<Voice>::Iterator Engine::LaunchVoice (
157            LinuxSampler::EngineChannel*  pEngineChannel,
158            Pool<Event>::Iterator&        itNoteOnEvent,
159            int                           iLayer,
160            bool                          ReleaseTriggerVoice,
161            bool                          VoiceStealing,
162            bool                          HandleKeyGroupConflicts
163        ) {
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            int iKeyGroup = pRegion->KeyGroup;
173            // only need to send a group event from the first voice in a layered region,
174            // as all layers in a region always belongs to the same key group
175            if (HandleKeyGroupConflicts && iLayer == 0) pChannel->HandleKeyGroupConflicts(iKeyGroup, itNoteOnEvent);
176    
177            Voice::type_t VoiceType = Voice::type_normal;
178    
179            // get current dimension values to select the right dimension region
180            //TODO: for stolen voices this dimension region selection block is processed twice, this should be changed
181            //FIXME: controller values for selecting the dimension region here are currently not sample accurate
182            uint DimValues[8] = { 0 };
183            for (int i = pRegion->Dimensions - 1; i >= 0; i--) {
184                switch (pRegion->pDimensionDefinitions[i].dimension) {
185                    case ::gig::dimension_samplechannel:
186                        DimValues[i] = 0; //TODO: we currently ignore this dimension
187                        break;
188                    case ::gig::dimension_layer:
189                        DimValues[i] = iLayer;
190                        break;
191                    case ::gig::dimension_velocity:
192                        DimValues[i] = itNoteOnEvent->Param.Note.Velocity;
193                        break;
194                    case ::gig::dimension_channelaftertouch:
195                        DimValues[i] = pChannel->ControllerTable[128];
196                        break;
197                    case ::gig::dimension_releasetrigger:
198                        VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;
199                        DimValues[i] = (uint) ReleaseTriggerVoice;
200                        break;
201                    case ::gig::dimension_keyboard:
202                        DimValues[i] = (uint) (pChannel->CurrentKeyDimension * pRegion->pDimensionDefinitions[i].zones);
203                        break;
204                    case ::gig::dimension_roundrobin:
205                        DimValues[i] = uint(*pChannel->pMIDIKeyInfo[MIDIKey].pRoundRobinIndex % pRegion->pDimensionDefinitions[i].zones); // RoundRobinIndex is incremented for each note on in this Region
206                        break;
207                    case ::gig::dimension_roundrobinkeyboard:
208                        DimValues[i] = uint(pChannel->RoundRobinIndex % pRegion->pDimensionDefinitions[i].zones); // RoundRobinIndex is incremented for each note on
209                        break;
210                    case ::gig::dimension_random:
211                        DimValues[i] = uint(Random() * pRegion->pDimensionDefinitions[i].zones);
212                        break;
213                    case ::gig::dimension_modwheel:
214                        DimValues[i] = pChannel->ControllerTable[1];
215                        break;
216                    case ::gig::dimension_breath:
217                        DimValues[i] = pChannel->ControllerTable[2];
218                        break;
219                    case ::gig::dimension_foot:
220                        DimValues[i] = pChannel->ControllerTable[4];
221                        break;
222                    case ::gig::dimension_portamentotime:
223                        DimValues[i] = pChannel->ControllerTable[5];
224                        break;
225                    case ::gig::dimension_effect1:
226                        DimValues[i] = pChannel->ControllerTable[12];
227                        break;
228                    case ::gig::dimension_effect2:
229                        DimValues[i] = pChannel->ControllerTable[13];
230                        break;
231                    case ::gig::dimension_genpurpose1:
232                        DimValues[i] = pChannel->ControllerTable[16];
233                        break;
234                    case ::gig::dimension_genpurpose2:
235                        DimValues[i] = pChannel->ControllerTable[17];
236                        break;
237                    case ::gig::dimension_genpurpose3:
238                        DimValues[i] = pChannel->ControllerTable[18];
239                        break;
240                    case ::gig::dimension_genpurpose4:
241                        DimValues[i] = pChannel->ControllerTable[19];
242                        break;
243                    case ::gig::dimension_sustainpedal:
244                        DimValues[i] = pChannel->ControllerTable[64];
245                        break;
246                    case ::gig::dimension_portamento:
247                        DimValues[i] = pChannel->ControllerTable[65];
248                        break;
249                    case ::gig::dimension_sostenutopedal:
250                        DimValues[i] = pChannel->ControllerTable[66];
251                        break;
252                    case ::gig::dimension_softpedal:
253                        DimValues[i] = pChannel->ControllerTable[67];
254                        break;
255                    case ::gig::dimension_genpurpose5:
256                        DimValues[i] = pChannel->ControllerTable[80];
257                        break;
258                    case ::gig::dimension_genpurpose6:
259                        DimValues[i] = pChannel->ControllerTable[81];
260                        break;
261                    case ::gig::dimension_genpurpose7:
262                        DimValues[i] = pChannel->ControllerTable[82];
263                        break;
264                    case ::gig::dimension_genpurpose8:
265                        DimValues[i] = pChannel->ControllerTable[83];
266                        break;
267                    case ::gig::dimension_effect1depth:
268                        DimValues[i] = pChannel->ControllerTable[91];
269                        break;
270                    case ::gig::dimension_effect2depth:
271                        DimValues[i] = pChannel->ControllerTable[92];
272                        break;
273                    case ::gig::dimension_effect3depth:
274                        DimValues[i] = pChannel->ControllerTable[93];
275                        break;
276                    case ::gig::dimension_effect4depth:
277                        DimValues[i] = pChannel->ControllerTable[94];
278                        break;
279                    case ::gig::dimension_effect5depth:
280                        DimValues[i] = pChannel->ControllerTable[95];
281                        break;
282                    case ::gig::dimension_none:
283                        std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;
284                        break;
285                    default:
286                        std::cerr << "gig::Engine::LaunchVoice() Error: Unknown dimension\n" << std::flush;
287                }
288            }
289    
290      uint Engine::VoiceCount() {          // return if this is a release triggered voice and there is no
291          return ActiveVoiceCount;          // releasetrigger dimension (could happen if an instrument
292      }          // change has occured between note on and off)
293            if (ReleaseTriggerVoice && !(VoiceType & Voice::type_release_trigger)) return Pool<Voice>::Iterator();
294    
295      uint Engine::VoiceCountMax() {          ::gig::DimensionRegion* pDimRgn = pRegion->GetDimensionRegionByValue(DimValues);
         return ActiveVoiceCountMax;  
     }  
296    
297      bool Engine::DiskStreamSupported() {          // no need to continue if sample is silent
298          return true;          if (!pDimRgn->pSample || !pDimRgn->pSample->SamplesTotal) return Pool<Voice>::Iterator();
     }  
299    
300      uint Engine::DiskStreamCount() {          // allocate a new voice for the key
301          return (pDiskThread) ? pDiskThread->ActiveStreamCount : 0;          Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
     }  
302    
303      uint Engine::DiskStreamCountMax() {          int res = InitNewVoice (
304          return (pDiskThread) ? pDiskThread->ActiveStreamCountMax : 0;                  pChannel, pDimRgn, itNoteOnEvent, VoiceType, iLayer,
305      }                  iKeyGroup, ReleaseTriggerVoice, VoiceStealing, itNewVoice
306            );
307            if (!res) return itNewVoice;
308    
309      String Engine::DiskStreamBufferFillBytes() {          return Pool<Voice>::Iterator(); // no free voice or error
         return pDiskThread->GetBufferFillBytes();  
310      }      }
311    
312      String Engine::DiskStreamBufferFillPercentage() {      bool Engine::DiskStreamSupported() {
313          return pDiskThread->GetBufferFillPercentage();          return true;
314      }      }
315    
316      String Engine::Description() {      String Engine::Description() {
317          return "Gigasampler Engine";          return "GigaSampler Format Engine";
318      }      }
319    
320      String Engine::Version() {      String Engine::Version() {
321          return "0.0.1-0cvs20040423";          String s = "$Revision$";
322            return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword
323      }      }
324    
325  }} // namespace LinuxSampler::gig  }} // namespace LinuxSampler::gig
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