/[svn]/linuxsampler/trunk/src/engines/gig/Engine.cpp
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revision 460 by schoenebeck, Mon Mar 14 22:35:44 2005 UTC revision 2012 by iliev, Fri Oct 23 17:53:17 2009 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *   *   Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck    *
6   *   Copyright (C) 2005 Christian Schoenebeck                              *   *   Copyright (C) 2005-2009 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 21  Line 22 
22   *   MA  02111-1307  USA                                                   *   *   MA  02111-1307  USA                                                   *
23   ***************************************************************************/   ***************************************************************************/
24    
 #include <sstream>  
 #include "DiskThread.h"  
 #include "Voice.h"  
 #include "EGADSR.h"  
 #include "../EngineFactory.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;  
   
     std::map<AudioOutputDevice*,Engine*> Engine::engines;  
   
     /**  
      * Get a gig::Engine object for the given gig::EngineChannel and the  
      * given AudioOutputDevice. All engine channels which are connected to  
      * the same audio output device will use the same engine instance. This  
      * method will be called by a gig::EngineChannel whenever it's  
      * connecting to a audio output device.  
      *  
      * @param pChannel - engine channel which acquires an engine object  
      * @param pDevice  - the audio output device \a pChannel is connected to  
      */  
     Engine* Engine::AcquireEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {  
         Engine* pEngine = NULL;  
         // check if there's already an engine for the given audio output device  
         if (engines.count(pDevice)) {  
             dmsg(4,("Using existing gig::Engine.\n"));  
             pEngine = engines[pDevice];  
         } else { // create a new engine (and disk thread) instance for the given audio output device  
             dmsg(4,("Creating new gig::Engine.\n"));  
             pEngine = (Engine*) EngineFactory::Create("gig");  
             pEngine->Connect(pDevice);  
             engines[pDevice] = pEngine;  
         }  
         // register engine channel to the engine instance  
         pEngine->engineChannels.add(pChannel);  
         // remember index in the ArrayList  
         pChannel->iEngineIndexSelf = pEngine->engineChannels.size() - 1;  
         dmsg(4,("This gig::Engine has now %d EngineChannels.\n",pEngine->engineChannels.size()));  
         return pEngine;  
     }  
   
     /**  
      * Once an engine channel is disconnected from an audio output device,  
      * it wil immediately call this method to unregister itself from the  
      * engine instance and if that engine instance is not used by any other  
      * engine channel anymore, then that engine instance will be destroyed.  
      *  
      * @param pChannel - engine channel which wants to disconnect from it's  
      *                   engine instance  
      * @param pDevice  - audio output device \a pChannel was connected to  
      */  
     void Engine::FreeEngine(LinuxSampler::gig::EngineChannel* pChannel, AudioOutputDevice* pDevice) {  
         dmsg(4,("Disconnecting EngineChannel from gig::Engine.\n"));  
         Engine* pEngine = engines[pDevice];  
         // unregister EngineChannel from the Engine instance  
         pEngine->engineChannels.remove(pChannel);  
         // if the used Engine instance is not used anymore, then destroy it  
         if (pEngine->engineChannels.empty()) {  
             pDevice->Disconnect(pEngine);  
             engines.erase(pDevice);  
             delete pEngine;  
             dmsg(4,("Destroying gig::Engine.\n"));  
         }  
         else dmsg(4,("This gig::Engine has now %d EngineChannels.\n",pEngine->engineChannels.size()));  
     }  
   
     Engine::Engine() {  
         pAudioOutputDevice = NULL;  
         pDiskThread        = NULL;  
         pEventGenerator    = NULL;  
         pSysexBuffer       = new RingBuffer<uint8_t>(SYSEX_BUFFER_SIZE, 0);  
         pEventQueue        = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT, 0);  
         pEventPool         = new Pool<Event>(MAX_EVENTS_PER_FRAGMENT);  
         pVoicePool         = new Pool<Voice>(MAX_AUDIO_VOICES);  
         pVoiceStealingQueue = new RTList<Event>(pEventPool);  
         pGlobalEvents      = new RTList<Event>(pEventPool);  
         for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {  
             iterVoice->SetEngine(this);  
         }  
         pVoicePool->clear();  
   
         pSynthesisParameters[0] = NULL; // we allocate when an audio device is connected  
         pBasicFilterParameters  = NULL;  
         pMainFilterParameters   = NULL;  
   
         ResetInternal();  
     }  
   
     Engine::~Engine() {  
         if (pDiskThread) {  
             dmsg(1,("Stopping disk thread..."));  
             pDiskThread->StopThread();  
             delete pDiskThread;  
             dmsg(1,("OK\n"));  
         }  
         if (pEventQueue) delete pEventQueue;  
         if (pEventPool)  delete pEventPool;  
         if (pVoicePool) {  
             pVoicePool->clear();  
             delete pVoicePool;  
         }  
         if (pEventGenerator) delete pEventGenerator;  
         if (pMainFilterParameters) delete[] pMainFilterParameters;  
         if (pBasicFilterParameters) delete[] pBasicFilterParameters;  
         if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);  
         if (pVoiceStealingQueue) delete pVoiceStealingQueue;  
         if (pSysexBuffer) delete pSysexBuffer;  
         EngineFactory::Destroy(this);  
     }  
   
     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();  
         ResetInternal();  
         Enable();  
     }  
   
     /**  
      *  Reset all voices and disk thread and clear input event queue and all  
      *  control and status variables. This method is not thread safe!  
      */  
     void Engine::ResetInternal() {  
         ActiveVoiceCount    = 0;  
         ActiveVoiceCountMax = 0;  
   
         // reset voice stealing parameters  
         pVoiceStealingQueue->clear();  
         itLastStolenVoice  = RTList<Voice>::Iterator();  
         iuiLastStolenKey   = RTList<uint>::Iterator();  
         pLastStolenChannel = NULL;  
   
         // reset to normal chromatic scale (means equal temper)  
         memset(&ScaleTuning[0], 0x00, 12);  
   
         // reset all voices  
         for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {  
             iterVoice->Reset();  
         }  
         pVoicePool->clear();  
   
         // reset disk thread  
         if (pDiskThread) pDiskThread->Reset();  
   
         // delete all input events  
         pEventQueue->init();  
     }  
   
     void Engine::Connect(AudioOutputDevice* pAudioOut) {  
         pAudioOutputDevice = pAudioOut;  
   
         ResetInternal();  
   
         // inform audio driver for the need of two channels  
         try {  
             pAudioOutputDevice->AcquireChannels(2); // gig engine only stereo  
         }  
         catch (AudioOutputException e) {  
             String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message();  
             throw LinuxSamplerException(msg);  
         }  
   
         this->MaxSamplesPerCycle = pAudioOutputDevice->MaxSamplesPerCycle();  
         this->SampleRate         = pAudioOutputDevice->SampleRate();  
   
         // FIXME: audio drivers with varying fragment sizes might be a problem here  
         MaxFadeOutPos = MaxSamplesPerCycle - int(double(SampleRate) * EG_MIN_RELEASE_TIME) - 1;  
         if (MaxFadeOutPos < 0)  
             throw LinuxSamplerException("EG_MIN_RELEASE_TIME in EGADSR.h too big for current audio fragment size / sampling rate!");  
   
         // (re)create disk thread  
         if (this->pDiskThread) {  
             dmsg(1,("Stopping disk thread..."));  
             this->pDiskThread->StopThread();  
             delete this->pDiskThread;  
             dmsg(1,("OK\n"));  
         }  
         this->pDiskThread = new DiskThread(((pAudioOut->MaxSamplesPerCycle() << MAX_PITCH) << 1) + 6); //FIXME: assuming stereo  
         if (!pDiskThread) {  
             dmsg(0,("gig::Engine  new diskthread = NULL\n"));  
             exit(EXIT_FAILURE);  
         }  
   
         for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {  
             iterVoice->pDiskThread = this->pDiskThread;  
             dmsg(3,("d"));  
         }  
         pVoicePool->clear();  
   
         // (re)create event generator  
         if (pEventGenerator) delete pEventGenerator;  
         pEventGenerator = new EventGenerator(pAudioOut->SampleRate());  
   
         // (re)allocate synthesis parameter matrix  
         if (pSynthesisParameters[0]) free(pSynthesisParameters[0]);  
   
         #if defined(__APPLE__)  
         pSynthesisParameters[0] = (float *) malloc(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle());  
         #else  
         pSynthesisParameters[0] = (float *) memalign(16,(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle()));  
         #endif  
         for (int dst = 1; dst < Event::destination_count; dst++)  
             pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle();  
   
         // (re)allocate biquad filter parameter sequence  
         if (pBasicFilterParameters) delete[] pBasicFilterParameters;  
         if (pMainFilterParameters)  delete[] pMainFilterParameters;  
         pBasicFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];  
         pMainFilterParameters  = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()];  
   
         dmsg(1,("Starting disk thread..."));  
         pDiskThread->StartThread();  
         dmsg(1,("OK\n"));  
   
         for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {  
             if (!iterVoice->pDiskThread) {  
                 dmsg(0,("Engine -> voice::trigger: !pDiskThread\n"));  
                 exit(EXIT_FAILURE);  
             }  
         }  
     }  
   
     void Engine::ClearEventLists() {  
         pGlobalEvents->clear();  
     }  
   
     /**  
      * Copy all events from the engine's global input queue buffer to the  
      * engine's internal event list. This will be done at the beginning of  
      * each audio cycle (that is each RenderAudio() call) to distinguish  
      * all global events which have to be processed in the current audio  
      * cycle. These events are usually just SysEx messages. Every  
      * EngineChannel has it's own input event queue buffer and event list  
      * to handle common events like NoteOn, NoteOff and ControlChange  
      * events.  
      *  
      * @param Samples - number of sample points to be processed in the  
      *                  current audio cycle  
      */  
     void Engine::ImportEvents(uint Samples) {  
         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 (pGlobalEvents->poolIsEmpty()) {  
                 dmsg(1,("Event pool emtpy!\n"));  
                 break;  
             }  
             *pGlobalEvents->allocAppend() = *pEvent;  
         }  
         eventQueueReader.free(); // free all copied events from input queue  
     }  
30    
31      /**      /**
32       *  Let this engine proceed to render the given amount of sample points. The       *  Reacts on supported control change commands (e.g. pitch bend wheel,
33       *  calculated audio data of all voices of this engine will be placed into       *  modulation wheel, aftertouch).
      *  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.  
34       *       *
35       *  @param Samples - number of sample points to be rendered       *  @param pEngineChannel - engine channel on which this event occured on
36       *  @returns       0 on success       *  @param itControlChangeEvent - controller, value and time stamp of the event
37       */       */
38      int Engine::RenderAudio(uint Samples) {      void Engine::ProcessControlChange (
39          dmsg(5,("RenderAudio(Samples=%d)\n", Samples));          LinuxSampler::EngineChannel*  pEngineChannel,
40            Pool<Event>::Iterator&        itControlChangeEvent
41          // return if engine disabled      ) {
42          if (EngineDisabled.Pop()) {          dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
             dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe()));  
             return 0;  
         }  
   
         // update time of start and end of this audio fragment (as events' time stamps relate to this)  
         pEventGenerator->UpdateFragmentTime(Samples);  
43    
44          // get all events from the engine's global input event queue which belong to the current fragment          EngineChannel* pChannel = dynamic_cast<EngineChannel*>(pEngineChannel);
45          // (these are usually just SysEx messages)          // handle the "control triggered" MIDI rule: a control change
46          ImportEvents(Samples);          // event can trigger a new note on or note off event
47            if (pChannel->pInstrument) {
48          // process engine global events (these are currently only MIDI System Exclusive messages)  
49          {              ::gig::MidiRule* rule;
50              RTList<Event>::Iterator itEvent = pGlobalEvents->first();              for (int i = 0 ; (rule = pChannel->pInstrument->GetMidiRule(i)) ; i++) {
51              RTList<Event>::Iterator end     = pGlobalEvents->end();  
52              for (; itEvent != end; ++itEvent) {                  if (::gig::MidiRuleCtrlTrigger* ctrlTrigger =
53                  switch (itEvent->Type) {                      dynamic_cast< ::gig::MidiRuleCtrlTrigger*>(rule)) {
54                      case Event::type_sysex:                      if (itControlChangeEvent->Param.CC.Controller ==
55                          dmsg(5,("Engine: Sysex received\n"));                          ctrlTrigger->ControllerNumber) {
56                          ProcessSysex(itEvent);  
57                          break;                          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"));
96                                }
97                            }
98                        }
99                  }                  }
100              }              }
101          }          }
102    
103          // We only allow a maximum of MAX_AUDIO_VOICES voices to be stolen          // update controller value in the engine channel's controller table
104          // in each audio fragment. All subsequent request for spawning new          pChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
         // voices in the same audio fragment will be ignored.  
         VoiceTheftsLeft = MAX_AUDIO_VOICES;  
   
         // reset internal voice counter (just for statistic of active voices)  
         ActiveVoiceCountTemp = 0;  
   
   
         // render audio on all engine channels  
         for (int i = 0; i < engineChannels.size(); i++) {  
             if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded  
             // handle events on that engine channel  
             ProcessEvents(engineChannels[i], Samples);  
             // render all 'normal', active voices  
             RenderActiveVoices(engineChannels[i], Samples);  
         }  
   
         // now that all ordinary voices on ALL engine channels are rendered, render new stolen voices  
         RenderStolenVoices(Samples);  
   
         // handle cleanup on all engine channels for the next audio fragment  
         for (int i = 0; i < engineChannels.size(); i++) {  
             if (!engineChannels[i]->pInstrument) continue; // ignore if no instrument loaded  
             PostProcess(engineChannels[i]);  
         }  
   
   
         // empty the engine's event list for the next audio fragment  
         ClearEventLists();  
   
         // reset voice stealing for the next audio fragment  
         pVoiceStealingQueue->clear();  
         itLastStolenVoice  = RTList<Voice>::Iterator();  
         iuiLastStolenKey   = RTList<uint>::Iterator();  
         pLastStolenChannel = NULL;  
   
         // just some statistics about this engine instance  
         ActiveVoiceCount = ActiveVoiceCountTemp;  
         if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;  
105    
106          return 0;          ProcessHardcodedControllers(pEngineChannel, itControlChangeEvent);
     }  
   
     void Engine::ProcessEvents(EngineChannel* pEngineChannel, uint Samples) {  
         // get all events from the engine channels's input event queue which belong to the current fragment  
         // (these are the common events like NoteOn, NoteOff, ControlChange, etc.)  
         pEngineChannel->ImportEvents(Samples);  
   
         // process events  
         {  
             RTList<Event>::Iterator itEvent = pEngineChannel->pEvents->first();  
             RTList<Event>::Iterator end     = pEngineChannel->pEvents->end();  
             for (; itEvent != end; ++itEvent) {  
                 switch (itEvent->Type) {  
                     case Event::type_note_on:  
                         dmsg(5,("Engine: Note on received\n"));  
                         ProcessNoteOn((EngineChannel*)itEvent->pEngineChannel, itEvent);  
                         break;  
                     case Event::type_note_off:  
                         dmsg(5,("Engine: Note off received\n"));  
                         ProcessNoteOff((EngineChannel*)itEvent->pEngineChannel, itEvent);  
                         break;  
                     case Event::type_control_change:  
                         dmsg(5,("Engine: MIDI CC received\n"));  
                         ProcessControlChange((EngineChannel*)itEvent->pEngineChannel, itEvent);  
                         break;  
                     case Event::type_pitchbend:  
                         dmsg(5,("Engine: Pitchbend received\n"));  
                         ProcessPitchbend((EngineChannel*)itEvent->pEngineChannel, itEvent);  
                         break;  
                 }  
             }  
         }  
     }  
   
     void Engine::RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples) {  
         RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();  
         RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();  
         while (iuiKey != end) { // iterate through all active keys  
             midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];  
             ++iuiKey;  
   
             RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();  
             RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();  
             for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key  
                 // now render current voice  
                 itVoice->Render(Samples);  
                 if (itVoice->IsActive()) ActiveVoiceCountTemp++; // still active  
                 else { // voice reached end, is now inactive  
                     FreeVoice(pEngineChannel, itVoice); // remove voice from the list of active voices  
                 }  
             }  
         }  
     }  
107    
108      void Engine::RenderStolenVoices(uint Samples) {          // handle FX send controllers
109          RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();          ProcessFxSendControllers(pChannel, itControlChangeEvent);
         RTList<Event>::Iterator end               = pVoiceStealingQueue->end();  
         for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {  
             EngineChannel* pEngineChannel = (EngineChannel*) itVoiceStealEvent->pEngineChannel;  
             Pool<Voice>::Iterator itNewVoice =  
                 LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false);  
             if (itNewVoice) {  
                 itNewVoice->Render(Samples);  
                 if (itNewVoice->IsActive()) ActiveVoiceCountTemp++; // still active  
                 else { // voice reached end, is now inactive  
                     FreeVoice(pEngineChannel, itNewVoice); // remove voice from the list of active voices  
                 }  
             }  
             else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n"));  
         }  
110      }      }
111    
112      void Engine::PostProcess(EngineChannel* pEngineChannel) {      DiskThread* Engine::CreateDiskThread() {
113          // free all keys which have no active voices left          return new DiskThread (
114          {              iMaxDiskStreams,
115              RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();              ((pAudioOutputDevice->MaxSamplesPerCycle() << CONFIG_MAX_PITCH) << 1) + 6, //FIXME: assuming stereo
116              RTList<uint>::Iterator end    = pEngineChannel->pActiveKeys->end();              &instruments
117              while (iuiKey != end) { // iterate through all active keys          );
118                  midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];      }
119                  ++iuiKey;  
120                  if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);      void Engine::TriggerNewVoices (
121                  #if DEVMODE          LinuxSampler::EngineChannel* pEngineChannel,
122                  else { // FIXME: should be removed before the final release (purpose: just a sanity check for debugging)          RTList<Event>::Iterator&     itNoteOnEvent,
123                      RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();          bool                         HandleKeyGroupConflicts
124                      RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();      ) {
125                      for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key          EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
126                          if (itVoice->itKillEvent) {          // first, get total amount of required voices (dependant on amount of layers)
127                              dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));          ::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            // 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            // handle key group (a.k.a. exclusive group) conflicts
177            if (HandleKeyGroupConflicts) {
178                if (iKeyGroup) { // if this voice / key belongs to a key group
179                    uint** ppKeyGroup = &pChannel->ActiveKeyGroups[iKeyGroup];
180                    if (*ppKeyGroup) { // if there's already an active key in that key group
181                        EngineChannel::MidiKey* pOtherKey = &pChannel->pMIDIKeyInfo[**ppKeyGroup];
182                        // kill all voices on the (other) key
183                        RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();
184                        RTList<Voice>::Iterator end               = pOtherKey->pActiveVoices->end();
185                        for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {
186                            if (itVoiceToBeKilled->Type != Voice::type_release_trigger) {
187                                itVoiceToBeKilled->Kill(itNoteOnEvent);
188                                --VoiceSpawnsLeft; //FIXME: just a hack, we should better check in StealVoice() if the voice was killed due to key conflict
189                          }                          }
190                      }                      }
191                  }                  }
                 #endif // DEVMODE  
192              }              }
193          }          }
194    
195          // empty the engine channel's own event lists          Voice::type_t VoiceType = Voice::type_normal;
         pEngineChannel->ClearEventLists();  
     }  
   
     /**  
      *  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;  
         event.pEngineChannel    = NULL; // as Engine global event  
         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;  
196    
197                  }          // get current dimension values to select the right dimension region
198                  // finally place sysex event into input event queue          //TODO: for stolen voices this dimension region selection block is processed twice, this should be changed
199                  pEventQueue->push(&event);          //FIXME: controller values for selecting the dimension region here are currently not sample accurate
200              }          uint DimValues[8] = { 0 };
201              else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,SYSEX_BUFFER_SIZE));          for (int i = pRegion->Dimensions - 1; i >= 0; i--) {
202          }              switch (pRegion->pDimensionDefinitions[i].dimension) {
203          else dmsg(1,("Engine: Input event queue full!"));                  case ::gig::dimension_samplechannel:
204      }                      DimValues[i] = 0; //TODO: we currently ignore this dimension
205                        break;
206      /**                  case ::gig::dimension_layer:
207       *  Assigns and triggers a new voice for the respective MIDI key.                      DimValues[i] = iLayer;
208       *                      break;
209       *  @param pEngineChannel - engine channel on which this event occured on                  case ::gig::dimension_velocity:
210       *  @param itNoteOnEvent - key, velocity and time stamp of the event                      DimValues[i] = itNoteOnEvent->Param.Note.Velocity;
211       */                      break;
212      void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {                  case ::gig::dimension_channelaftertouch:
213                        DimValues[i] = pChannel->ControllerTable[128];
214          const int key = itNoteOnEvent->Param.Note.Key;                      break;
215                    case ::gig::dimension_releasetrigger:
216          // Change key dimension value if key is in keyswitching area                      VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;
217          {                      DimValues[i] = (uint) ReleaseTriggerVoice;
218              const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;                      break;
219              if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)                  case ::gig::dimension_keyboard:
220                  pEngineChannel->CurrentKeyDimension = ((key - pInstrument->DimensionKeyRange.low) * 128) /                      DimValues[i] = (uint) (pChannel->CurrentKeyDimension * pRegion->pDimensionDefinitions[i].zones);
221                      (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);                      break;
222          }                  case ::gig::dimension_roundrobin:
223                        DimValues[i] = (uint) pChannel->pMIDIKeyInfo[MIDIKey].RoundRobinIndex; // incremented for each note on
224          midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];                      break;
225                    case ::gig::dimension_random:
226          pKey->KeyPressed = true; // the MIDI key was now pressed down                      RandomSeed   = RandomSeed * 1103515245 + 12345; // classic pseudo random number generator
227                        DimValues[i] = (uint) RandomSeed >> (32 - pRegion->pDimensionDefinitions[i].bits); // highest bits are most random
228          // cancel release process of voices on this key if needed                      break;
229          if (pKey->Active && !pEngineChannel->SustainPedal) {                  case ::gig::dimension_modwheel:
230              RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();                      DimValues[i] = pChannel->ControllerTable[1];
231              if (itCancelReleaseEvent) {                      break;
232                  *itCancelReleaseEvent = *itNoteOnEvent;                  // copy event                  case ::gig::dimension_breath:
233                  itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type                      DimValues[i] = pChannel->ControllerTable[2];
234              }                      break;
235              else dmsg(1,("Event pool emtpy!\n"));                  case ::gig::dimension_foot:
236          }                      DimValues[i] = pChannel->ControllerTable[4];
237                        break;
238          // move note on event to the key's own event list                  case ::gig::dimension_portamentotime:
239          RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);                      DimValues[i] = pChannel->ControllerTable[5];
240                        break;
241          // allocate and trigger new voice(s) for the key                  case ::gig::dimension_effect1:
242          {                      DimValues[i] = pChannel->ControllerTable[12];
243              // first, get total amount of required voices (dependant on amount of layers)                      break;
244              ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEventOnKeyList->Param.Note.Key);                  case ::gig::dimension_effect2:
245              if (pRegion) {                      DimValues[i] = pChannel->ControllerTable[13];
246                  int voicesRequired = pRegion->Layers;                      break;
247                  // now launch the required amount of voices                  case ::gig::dimension_genpurpose1:
248                  for (int i = 0; i < voicesRequired; i++)                      DimValues[i] = pChannel->ControllerTable[16];
249                      LaunchVoice(pEngineChannel, itNoteOnEventOnKeyList, i, false, true);                      break;
250                    case ::gig::dimension_genpurpose2:
251                        DimValues[i] = pChannel->ControllerTable[17];
252                        break;
253                    case ::gig::dimension_genpurpose3:
254                        DimValues[i] = pChannel->ControllerTable[18];
255                        break;
256                    case ::gig::dimension_genpurpose4:
257                        DimValues[i] = pChannel->ControllerTable[19];
258                        break;
259                    case ::gig::dimension_sustainpedal:
260                        DimValues[i] = pChannel->ControllerTable[64];
261                        break;
262                    case ::gig::dimension_portamento:
263                        DimValues[i] = pChannel->ControllerTable[65];
264                        break;
265                    case ::gig::dimension_sostenutopedal:
266                        DimValues[i] = pChannel->ControllerTable[66];
267                        break;
268                    case ::gig::dimension_softpedal:
269                        DimValues[i] = pChannel->ControllerTable[67];
270                        break;
271                    case ::gig::dimension_genpurpose5:
272                        DimValues[i] = pChannel->ControllerTable[80];
273                        break;
274                    case ::gig::dimension_genpurpose6:
275                        DimValues[i] = pChannel->ControllerTable[81];
276                        break;
277                    case ::gig::dimension_genpurpose7:
278                        DimValues[i] = pChannel->ControllerTable[82];
279                        break;
280                    case ::gig::dimension_genpurpose8:
281                        DimValues[i] = pChannel->ControllerTable[83];
282                        break;
283                    case ::gig::dimension_effect1depth:
284                        DimValues[i] = pChannel->ControllerTable[91];
285                        break;
286                    case ::gig::dimension_effect2depth:
287                        DimValues[i] = pChannel->ControllerTable[92];
288                        break;
289                    case ::gig::dimension_effect3depth:
290                        DimValues[i] = pChannel->ControllerTable[93];
291                        break;
292                    case ::gig::dimension_effect4depth:
293                        DimValues[i] = pChannel->ControllerTable[94];
294                        break;
295                    case ::gig::dimension_effect5depth:
296                        DimValues[i] = pChannel->ControllerTable[95];
297                        break;
298                    case ::gig::dimension_none:
299                        std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;
300                        break;
301                    default:
302                        std::cerr << "gig::Engine::LaunchVoice() Error: Unknown dimension\n" << std::flush;
303              }              }
304          }          }
305    
306          pKey->RoundRobinIndex++;          // return if this is a release triggered voice and there is no
307      }          // releasetrigger dimension (could happen if an instrument
308            // change has occured between note on and off)
309      /**          if (ReleaseTriggerVoice && VoiceType != Voice::type_release_trigger) return Pool<Voice>::Iterator();
      *  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 pEngineChannel - engine channel on which this event occured on  
      *  @param itNoteOffEvent - key, velocity and time stamp of the event  
      */  
     void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {  
         midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];  
   
         pKey->KeyPressed = false; // the MIDI key was now released  
   
         // release voices on this key if needed  
         if (pKey->Active && !pEngineChannel->SustainPedal) {  
             itNoteOffEvent->Type = Event::type_release; // transform event type  
         }  
   
         // move event to the key's own event list  
         RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);  
   
         // spawn release triggered voice(s) if needed  
         if (pKey->ReleaseTrigger) {  
             // first, get total amount of required voices (dependant on amount of layers)  
             ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOffEventOnKeyList->Param.Note.Key);  
             if (pRegion) {  
                 int voicesRequired = pRegion->Layers;  
                 // now launch the required amount of voices  
                 for (int i = 0; i < voicesRequired; i++)  
                     LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, i, true, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples  
             }  
             pKey->ReleaseTrigger = false;  
         }  
     }  
310    
311      /**          ::gig::DimensionRegion* pDimRgn = pRegion->GetDimensionRegionByValue(DimValues);
      *  Moves pitchbend event from the general (input) event list to the pitch  
      *  event list.  
      *  
      *  @param pEngineChannel - engine channel on which this event occured on  
      *  @param itPitchbendEvent - absolute pitch value and time stamp of the event  
      */  
     void Engine::ProcessPitchbend(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itPitchbendEvent) {  
         pEngineChannel->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value  
         itPitchbendEvent.moveToEndOf(pEngineChannel->pSynthesisEvents[Event::destination_vco]);  
     }  
312    
313      /**          // no need to continue if sample is silent
314       *  Allocates and triggers a new voice. This method will usually be          if (!pDimRgn->pSample || !pDimRgn->pSample->SamplesTotal) return Pool<Voice>::Iterator();
      *  called by the ProcessNoteOn() method and by the voices itself  
      *  (e.g. to spawn further voices on the same key for layered sounds).  
      *  
      *  @param pEngineChannel      - engine channel on which this event occured on  
      *  @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(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing) {  
         midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];  
315    
316          // allocate a new voice for the key          // allocate a new voice for the key
317          Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();          Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
318          if (itNewVoice) {          if (itNewVoice) {
319              // launch the new voice              // launch the new voice
320              if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pEngineChannel->pInstrument, iLayer, ReleaseTriggerVoice, VoiceStealing) < 0) {              if (itNewVoice->Trigger(pChannel, itNoteOnEvent, pChannel->Pitch, pDimRgn, VoiceType, iKeyGroup) < 0) {
321                  dmsg(4,("Voice not triggered\n"));                  dmsg(4,("Voice not triggered\n"));
322                  pKey->pActiveVoices->free(itNewVoice);                  pKey->pActiveVoices->free(itNewVoice);
323              }              }
324              else { // on success              else { // on success
325                  uint** ppKeyGroup = NULL;                  --VoiceSpawnsLeft;
                 if (itNewVoice->KeyGroup) { // if this voice / key belongs to a key group  
                     ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];  
                     if (*ppKeyGroup) { // if there's already an active key in that key group  
                         midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[**ppKeyGroup];  
                         // kill all voices on the (other) key  
                         RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first();  
                         RTList<Voice>::Iterator end               = pOtherKey->pActiveVoices->end();  
                         for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {  
                             if (itVoiceToBeKilled->Type != Voice::type_release_trigger) itVoiceToBeKilled->Kill(itNoteOnEvent);  
                         }  
                     }  
                 }  
326                  if (!pKey->Active) { // mark as active key                  if (!pKey->Active) { // mark as active key
327                      pKey->Active = true;                      pKey->Active = true;
328                      pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();                      pKey->itSelf = pChannel->pActiveKeys->allocAppend();
329                      *pKey->itSelf = itNoteOnEvent->Param.Note.Key;                      *pKey->itSelf = itNoteOnEvent->Param.Note.Key;
330                  }                  }
331                  if (itNewVoice->KeyGroup) {                  if (itNewVoice->KeyGroup) {
332                        uint** ppKeyGroup = &pChannel->ActiveKeyGroups[itNewVoice->KeyGroup];
333                      *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group                      *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group
334                  }                  }
335                  if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)                  if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)
# Line 679  namespace LinuxSampler { namespace gig { Line 337  namespace LinuxSampler { namespace gig {
337              }              }
338          }          }
339          else if (VoiceStealing) {          else if (VoiceStealing) {
   
340              // try to steal one voice              // try to steal one voice
341              StealVoice(pEngineChannel, itNoteOnEvent);              int result = StealVoice(pChannel, itNoteOnEvent);
342                if (!result) { // voice stolen successfully
343              // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died                  // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died
344              RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();                  RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();
345              if (itStealEvent) {                  if (itStealEvent) {
346                  *itStealEvent = *itNoteOnEvent; // copy event                      *itStealEvent = *itNoteOnEvent; // copy event
347                  itStealEvent->Param.Note.Layer = iLayer;                      itStealEvent->Param.Note.Layer = iLayer;
348                  itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;                      itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;
349              }                      pKey->VoiceTheftsQueued++;
             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 pEngineChannel - engine channel on which this event occured on  
      *  @param itNoteOnEvent - key, velocity and time stamp of the event  
      */  
     void Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {  
         if (!VoiceTheftsLeft) {  
             dmsg(1,("Max. voice thefts per audio fragment reached (you may raise MAX_AUDIO_VOICES).\n"));  
             return;  
         }  
         if (!pEventPool->poolIsEmpty()) {  
   
             RTList<Voice>::Iterator itSelectedVoice;  
   
             // 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_oldestvoiceonkey: {  
                 #if 0 // FIXME: broken  
                     midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];  
                     if (this->itLastStolenVoice) {  
                         itSelectedVoice = this->itLastStolenVoice;  
                         ++itSelectedVoice;  
                     }  
                     else { // no voice stolen in this audio fragment cycle yet  
                         itSelectedVoice = pSelectedKey->pActiveVoices->first();  
                     }  
                     if (itSelectedVoice) {  
                         iuiSelectedKey = pSelectedKey->itSelf;  
                         break; // selection succeeded  
                     }  
                 #endif  
                 } // no break - intentional !  
   
                 // try to pick the oldest voice on the oldest active key  
                 // (caution: must stay after 'oldestvoiceonkey' algorithm !)  
                 case voice_steal_algo_oldestkey: {  
                     if (this->itLastStolenVoice) {  
                         itSelectedVoice = this->itLastStolenVoice;  
                         ++itSelectedVoice;  
                         if (itSelectedVoice) break; // selection succeeded  
                         RTList<uint>::Iterator iuiSelectedKey = this->iuiLastStolenKey;  
                         ++iuiSelectedKey;  
                         if (iuiSelectedKey) {  
                             this->iuiLastStolenKey = iuiSelectedKey;  
                             midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];  
                             itSelectedVoice = pSelectedKey->pActiveVoices->first();  
                             break; // selection succeeded  
                         }  
                     }  
                     break;  
                 }  
   
                 // don't steal anything  
                 case voice_steal_algo_none:  
                 default: {  
                     dmsg(1,("No free voice (voice stealing disabled)!\n"));  
                     return;  
                 }  
             }  
   
             // steal oldest voice on the oldest key from this or any other engine channel  
             if (!itSelectedVoice) {  
                 EngineChannel* pSelectedChannel = (pLastStolenChannel) ? pLastStolenChannel : pEngineChannel;  
                 int iChannelIndex = pSelectedChannel->iEngineIndexSelf;  
                 while (true) {  
                     RTList<uint>::Iterator iuiSelectedKey = pSelectedChannel->pActiveKeys->first();  
                     if (iuiSelectedKey) {  
                         midi_key_info_t* pSelectedKey = &pSelectedChannel->pMIDIKeyInfo[*iuiSelectedKey];  
                         itSelectedVoice    = pSelectedKey->pActiveVoices->first();  
                         iuiLastStolenKey   = iuiSelectedKey;  
                         pLastStolenChannel = pSelectedChannel;  
                         break; // selection succeeded  
                     }  
                     iChannelIndex    = (iChannelIndex + 1) % engineChannels.size();  
                     pSelectedChannel =  engineChannels[iChannelIndex];  
                 }  
             }  
   
             //FIXME: can be removed, just a sanity check for debugging  
             if (!itSelectedVoice->IsActive()) dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));  
   
             // now kill the selected voice  
             itSelectedVoice->Kill(itNoteOnEvent);  
   
             // remember which voice we stole, so we can simply proceed for the next voice stealing  
             itLastStolenVoice = itSelectedVoice;  
   
             --VoiceTheftsLeft;  
         }  
         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 pEngineChannel - engine channel on which this event occured on  
      *  @param itVoice - points to the voice to be freed  
      */  
     void Engine::FreeVoice(EngineChannel* pEngineChannel, Pool<Voice>::Iterator& itVoice) {  
         if (itVoice) {  
             midi_key_info_t* pKey = &pEngineChannel->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 = &pEngineChannel->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 pEngineChannel - engine channel on which this event occured on  
      *  @param pKey - key which is now inactive  
      */  
     void Engine::FreeKey(EngineChannel* pEngineChannel, midi_key_info_t* pKey) {  
         if (pKey->pActiveVoices->isEmpty()) {  
             pKey->Active = false;  
             pEngineChannel->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"));  
     }  
   
     /**  
      *  Reacts on supported control change commands (e.g. pitch bend wheel,  
      *  modulation wheel, aftertouch).  
      *  
      *  @param pEngineChannel - engine channel on which this event occured on  
      *  @param itControlChangeEvent - controller, value and time stamp of the event  
      */  
     void Engine::ProcessControlChange(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itControlChangeEvent) {  
         dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));  
   
         switch (itControlChangeEvent->Param.CC.Controller) {  
             case 7: { // volume  
                 //TODO: not sample accurate yet  
                 pEngineChannel->GlobalVolume = (float) itControlChangeEvent->Param.CC.Value / 127.0f;  
                 break;  
             }  
             case 10: { // panpot  
                 //TODO: not sample accurate yet  
                 const int pan = (int) itControlChangeEvent->Param.CC.Value - 64;  
                 pEngineChannel->GlobalPanLeft  = 1.0f - float(RTMath::Max(pan, 0)) /  63.0f;  
                 pEngineChannel->GlobalPanRight = 1.0f - float(RTMath::Min(pan, 0)) / -64.0f;  
                 break;  
             }  
             case 64: { // sustain  
                 if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {  
                     dmsg(4,("PEDAL DOWN\n"));  
                     pEngineChannel->SustainPedal = true;  
   
                     // cancel release process of voices if necessary  
                     RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();  
                     if (iuiKey) {  
                         itControlChangeEvent->Type = Event::type_cancel_release; // transform event type  
                         while (iuiKey) {  
                             midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];  
                             ++iuiKey;  
                             if (!pKey->KeyPressed) {  
                                 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();  
                                 if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list  
                                 else dmsg(1,("Event pool emtpy!\n"));  
                             }  
                         }  
                     }  
                 }  
                 if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {  
                     dmsg(4,("PEDAL UP\n"));  
                     pEngineChannel->SustainPedal = false;  
   
                     // release voices if their respective key is not pressed  
                     RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();  
                     if (iuiKey) {  
                         itControlChangeEvent->Type = Event::type_release; // transform event type  
                         while (iuiKey) {  
                             midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];  
                             ++iuiKey;  
                             if (!pKey->KeyPressed) {  
                                 RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();  
                                 if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list  
                                 else dmsg(1,("Event pool emtpy!\n"));  
                             }  
                         }  
                     }  
350                  }                  }
351                  break;                  else dmsg(1,("Voice stealing queue full!\n"));
352              }              }
353          }          }
354    
355          // update controller value in the engine's controller table          return Pool<Voice>::Iterator(); // no free voice or error
         pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;  
   
         // move event from the unsorted event list to the control change event list  
         itControlChangeEvent.moveToEndOf(pEngineChannel->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;  
             }  
         }  
   
         free_sysex_data: // finally free sysex data  
         pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);  
     }  
   
     /**  
      * Calculates the Roland GS sysex check sum.  
      *  
      * @param AddrReader - reader which currently points to the first GS  
      *                     command address byte of the GS sysex message in  
      *                     question  
      * @param DataSize   - size of the GS message data (in bytes)  
      */  
     uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) {  
         RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader;  
         uint bytes = 3 /*addr*/ + DataSize;  
         uint8_t addr_and_data[bytes];  
         reader.read(&addr_and_data[0], bytes);  
         uint8_t sum = 0;  
         for (uint i = 0; i < bytes; i++) sum += addr_and_data[i];  
         return 128 - sum % 128;  
     }  
   
     /**  
      * Allows to tune each of the twelve semitones of an octave.  
      *  
      * @param ScaleTunes - detuning of all twelve semitones (in cents)  
      */  
     void Engine::AdjustScale(int8_t ScaleTunes[12]) {  
         memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate  
     }  
   
     /**  
      * 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();  
         float* m = &pSynthesisParameters[dst][0];  
         for (int i = 0; i < maxsamples; i += 4) {  
            m[i]   = val;  
            m[i+1] = val;  
            m[i+2] = val;  
            m[i+3] = val;  
         }  
     }  
   
     uint Engine::VoiceCount() {  
         return ActiveVoiceCount;  
     }  
   
     uint Engine::VoiceCountMax() {  
         return ActiveVoiceCountMax;  
356      }      }
357    
358      bool Engine::DiskStreamSupported() {      bool Engine::DiskStreamSupported() {
359          return true;          return true;
360      }      }
361    
     uint Engine::DiskStreamCount() {  
         return (pDiskThread) ? pDiskThread->ActiveStreamCount : 0;  
     }  
   
     uint Engine::DiskStreamCountMax() {  
         return (pDiskThread) ? pDiskThread->ActiveStreamCountMax : 0;  
     }  
   
     String Engine::DiskStreamBufferFillBytes() {  
         return pDiskThread->GetBufferFillBytes();  
     }  
   
     String Engine::DiskStreamBufferFillPercentage() {  
         return pDiskThread->GetBufferFillPercentage();  
     }  
   
     String Engine::EngineName() {  
         return "GigEngine";  
     }  
   
362      String Engine::Description() {      String Engine::Description() {
363          return "Gigasampler Engine";          return "GigaSampler Format Engine";
364      }      }
365    
366      String Engine::Version() {      String Engine::Version() {
367          String s = "$Revision: 1.31 $";          String s = "$Revision: 1.105 $";
368          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
369      }      }
370    
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