/[svn]/linuxsampler/trunk/src/engines/gig/Engine.cpp
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revision 1043 by schoenebeck, Wed Feb 7 21:02:04 2007 UTC revision 2114 by persson, Tue Aug 10 12:05:19 2010 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck   *   *   Copyright (C) 2003,2004 by Benno Senoner and Christian Schoenebeck    *
6   *   Copyright (C) 2005-2007 Christian Schoenebeck                        *   *   Copyright (C) 2005-2008 Christian Schoenebeck                         *
7     *   Copyright (C) 2009-2010 Christian Schoenebeck and Grigor Iliev        *
8   *                                                                         *   *                                                                         *
9   *   This program is free software; you can redistribute it and/or modify  *   *   This program is free software; you can redistribute it and/or modify  *
10   *   it under the terms of the GNU General Public License as published by  *   *   it under the terms of the GNU General Public License as published by  *
# Line 21  Line 22 
22   *   MA  02111-1307  USA                                                   *   *   MA  02111-1307  USA                                                   *
23   ***************************************************************************/   ***************************************************************************/
24    
 #include <sstream>  
 #include "DiskThread.h"  
 #include "Voice.h"  
 #include "EGADSR.h"  
 #include "../EngineFactory.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;  
   
     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];  
   
             // Disable the engine while the new engine channel is  
             // added and initialized. The engine will be enabled again  
             // in EngineChannel::Connect.  
             pEngine->DisableAndLock();  
         } 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()));  
     }  
   
     /**  
      * Constructor  
      */  
     Engine::Engine() {  
         pAudioOutputDevice = NULL;  
         pDiskThread        = NULL;  
         pEventGenerator    = NULL;  
         pSysexBuffer       = new RingBuffer<uint8_t,false>(CONFIG_SYSEX_BUFFER_SIZE, 0);  
         pEventQueue        = new RingBuffer<Event,false>(CONFIG_MAX_EVENTS_PER_FRAGMENT, 0);  
         pEventPool         = new Pool<Event>(CONFIG_MAX_EVENTS_PER_FRAGMENT);  
         pVoicePool         = new Pool<Voice>(CONFIG_MAX_VOICES);  
         pDimRegionsInUse   = new ::gig::DimensionRegion*[CONFIG_MAX_VOICES + 1];  
         pVoiceStealingQueue = new RTList<Event>(pEventPool);  
         pGlobalEvents      = new RTList<Event>(pEventPool);  
         InstrumentChangeQueue      = new RingBuffer<instrument_change_command_t,false>(1, 0);  
         InstrumentChangeReplyQueue = new RingBuffer<instrument_change_reply_t,false>(1, 0);  
   
         for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {  
             iterVoice->SetEngine(this);  
         }  
         pVoicePool->clear();  
   
         ResetInternal();  
         ResetScaleTuning();  
     }  
   
     /**  
      * Destructor  
      */  
     Engine::~Engine() {  
         MidiInputPort::RemoveSysexListener(this);  
         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 (pVoiceStealingQueue) delete pVoiceStealingQueue;  
         if (pSysexBuffer) delete pSysexBuffer;  
         Unregister();  
     }  
   
     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();  
         ResetScaleTuning();  
         Enable();  
     }  
   
     /**  
      *  Reset all voices and disk thread and clear input event queue and all  
      *  control and status variables. This method is protected by a mutex.  
      */  
     void Engine::ResetInternal() {  
         ResetInternalMutex.Lock();  
   
         // make sure that the engine does not get any sysex messages  
         // while it's reseting  
         bool sysexDisabled = MidiInputPort::RemoveSysexListener(this);  
         ActiveVoiceCount    = 0;  
         ActiveVoiceCountMax = 0;  
   
         // reset voice stealing parameters  
         pVoiceStealingQueue->clear();  
         itLastStolenVoice          = RTList<Voice>::Iterator();  
         itLastStolenVoiceGlobally  = RTList<Voice>::Iterator();  
         iuiLastStolenKey           = RTList<uint>::Iterator();  
         iuiLastStolenKeyGlobally   = RTList<uint>::Iterator();  
         pLastStolenChannel         = NULL;  
   
         // 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();  
         pSysexBuffer->init();  
         if (sysexDisabled) MidiInputPort::AddSysexListener(this);  
         ResetInternalMutex.Unlock();  
     }  
   
     /**  
      * Reset to normal, chromatic scale (means equal tempered).  
      */  
     void Engine::ResetScaleTuning() {  
         memset(&ScaleTuning[0], 0x00, 12);  
     }  
   
     /**  
      * Connect this engine instance with the given audio output device.  
      * This method will be called when an Engine instance is created.  
      * All of the engine's data structures which are dependant to the used  
      * audio output device / driver will be (re)allocated and / or  
      * adjusted appropriately.  
      *  
      * @param pAudioOut - audio output device to connect to  
      */  
     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 Exception(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) * CONFIG_EG_MIN_RELEASE_TIME) - 1;  
         if (MaxFadeOutPos < 0) {  
             std::cerr << "gig::Engine: WARNING, CONFIG_EG_MIN_RELEASE_TIME "  
                       << "too big for current audio fragment size & sampling rate! "  
                       << "May lead to click sounds if voice stealing chimes in!\n" << std::flush;  
             // force volume ramp downs at the beginning of each fragment  
             MaxFadeOutPos = 0;  
             // lower minimum release time  
             const float minReleaseTime = (float) MaxSamplesPerCycle / (float) SampleRate;  
             for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) {  
                 iterVoice->EG1.CalculateFadeOutCoeff(minReleaseTime, SampleRate);  
             }  
             pVoicePool->clear();  
         }  
   
         // (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() << CONFIG_MAX_PITCH) << 1) + 6, //FIXME: assuming stereo  
                                            &instruments);  
         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());  
   
         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);  
             }  
         }  
     }  
   
     /**  
      * Clear all engine global event lists.  
      */  
     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,false>::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  
     }  
   
     /**  
      * Let this engine proceed to render the given amount of sample points.  
      * The engine will iterate through all engine channels and render audio  
      * for each engine channel independently. The calculated audio data of  
      * all voices of each engine channel will be placed into the audio sum  
      * buffers of the respective audio output device, connected to the  
      * respective engine channel.  
      *  
      *  @param Samples - number of sample points to be rendered  
      *  @returns       0 on success  
      */  
     int Engine::RenderAudio(uint Samples) {  
         dmsg(7,("RenderAudio(Samples=%d)\n", Samples));  
   
         // return if engine disabled  
         if (EngineDisabled.Pop()) {  
             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);  
   
         // We only allow a maximum of CONFIG_MAX_VOICES voices to be spawned  
         // in each audio fragment. All subsequent request for spawning new  
         // voices in the same audio fragment will be ignored.  
         VoiceSpawnsLeft = CONFIG_MAX_VOICES;  
   
         // get all events from the engine's global input event queue which belong to the current fragment  
         // (these are usually just SysEx messages)  
         ImportEvents(Samples);  
   
         // process engine global events (these are currently only MIDI System Exclusive messages)  
         {  
             RTList<Event>::Iterator itEvent = pGlobalEvents->first();  
             RTList<Event>::Iterator end     = pGlobalEvents->end();  
             for (; itEvent != end; ++itEvent) {  
                 switch (itEvent->Type) {  
                     case Event::type_sysex:  
                         dmsg(5,("Engine: Sysex received\n"));  
                         ProcessSysex(itEvent);  
                         break;  
                 }  
             }  
         }  
   
         // reset internal voice counter (just for statistic of active voices)  
         ActiveVoiceCountTemp = 0;  
   
         // handle instrument change commands  
         instrument_change_command_t command;  
         if (InstrumentChangeQueue->pop(&command) > 0) {  
             EngineChannel* pEngineChannel = command.pEngineChannel;  
             pEngineChannel->pInstrument = command.pInstrument;  
   
             // iterate through all active voices and mark their  
             // dimension regions as "in use". The instrument resource  
             // manager may delete all of the instrument except the  
             // dimension regions and samples that are in use.  
             int i = 0;  
             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  
                     if (!itVoice->Orphan) {  
                         itVoice->Orphan = true;  
                         pDimRegionsInUse[i++] = itVoice->pDimRgn;  
                     }  
                 }  
             }  
             pDimRegionsInUse[i] = 0; // end of list  
   
             // send a reply to the calling thread, which is waiting  
             instrument_change_reply_t reply;  
             InstrumentChangeReplyQueue->push(&reply);  
         }  
   
         // handle events on all engine channels  
         for (int i = 0; i < engineChannels.size(); i++) {  
             ProcessEvents(engineChannels[i], Samples);  
         }  
   
         // render all 'normal', active voices on all engine channels  
         for (int i = 0; i < engineChannels.size(); i++) {  
             RenderActiveVoices(engineChannels[i], Samples);  
         }  
   
         // now that all ordinary voices on ALL engine channels are rendered, render new stolen voices  
         RenderStolenVoices(Samples);  
   
         // handle audio routing for engine channels with FX sends  
         for (int i = 0; i < engineChannels.size(); i++) {  
             if (engineChannels[i]->fxSends.empty()) continue; // ignore if no FX sends  
             RouteAudio(engineChannels[i], Samples);  
         }  
   
         // handle cleanup on all engine channels for the next audio fragment  
         for (int i = 0; i < engineChannels.size(); i++) {  
             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();  
   
         // just some statistics about this engine instance  
         ActiveVoiceCount = ActiveVoiceCountTemp;  
         if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount;  
   
         FrameTime += Samples;  
   
         return 0;  
     }  
   
     /**  
      * Dispatch and handle all events in this audio fragment for the given  
      * engine channel.  
      *  
      * @param pEngineChannel - engine channel on which events should be  
      *                         processed  
      * @param Samples        - amount of sample points to be processed in  
      *                         this audio fragment cycle  
      */  
     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;  
                 }  
             }  
         }  
   
         // reset voice stealing for the next engine channel (or next audio fragment)  
         itLastStolenVoice         = RTList<Voice>::Iterator();  
         itLastStolenVoiceGlobally = RTList<Voice>::Iterator();  
         iuiLastStolenKey          = RTList<uint>::Iterator();  
         iuiLastStolenKeyGlobally  = RTList<uint>::Iterator();  
         pLastStolenChannel        = NULL;  
     }  
   
     /**  
      * Render all 'normal' voices (that is voices which were not stolen in  
      * this fragment) on the given engine channel.  
      *  
      * @param pEngineChannel - engine channel on which audio should be  
      *                         rendered  
      * @param Samples        - amount of sample points to be rendered in  
      *                         this audio fragment cycle  
      */  
     void Engine::RenderActiveVoices(EngineChannel* pEngineChannel, uint Samples) {  
         #if !CONFIG_PROCESS_MUTED_CHANNELS  
         if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted  
         #endif  
   
         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  
                 }  
             }  
         }  
     }  
30    
31      /**      /**
32       * Render all stolen voices (only voices which were stolen in this       *  Reacts on supported control change commands (e.g. pitch bend wheel,
33       * fragment) on the given engine channel. Stolen voices are rendered       *  modulation wheel, aftertouch).
      * after all normal voices have been rendered; this is needed to render  
      * audio of those voices which were selected for voice stealing until  
      * the point were the stealing (that is the take over of the voice)  
      * actually happened.  
34       *       *
35       * @param pEngineChannel - engine channel on which audio should be       *  @param pEngineChannel - engine channel on which this event occured on
36       *                         rendered       *  @param itControlChangeEvent - controller, value and time stamp of the event
      * @param Samples        - amount of sample points to be rendered in  
      *                         this audio fragment cycle  
37       */       */
38      void Engine::RenderStolenVoices(uint Samples) {      void Engine::ProcessControlChange (
39          RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first();          LinuxSampler::EngineChannel*  pEngineChannel,
40          RTList<Event>::Iterator end               = pVoiceStealingQueue->end();          Pool<Event>::Iterator&        itControlChangeEvent
41          for (; itVoiceStealEvent != end; ++itVoiceStealEvent) {      ) {
42              EngineChannel* pEngineChannel = (EngineChannel*) itVoiceStealEvent->pEngineChannel;          dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value));
             if (!pEngineChannel->pInstrument) continue; // ignore if no instrument loaded  
             Pool<Voice>::Iterator itNewVoice =  
                 LaunchVoice(pEngineChannel, itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false, 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"));  
   
             // we need to clear the key's event list explicitly here in case key was never active  
             midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[itVoiceStealEvent->Param.Note.Key];  
             pKey->VoiceTheftsQueued--;  
             if (!pKey->Active && !pKey->VoiceTheftsQueued) pKey->pEvents->clear();  
         }  
     }  
43    
44      /**          EngineChannel* pChannel = dynamic_cast<EngineChannel*>(pEngineChannel);
45       * Will be called in case the respective engine channel sports FX send          // handle the "control triggered" MIDI rule: a control change
46       * channels. In this particular case, engine channel local buffers are          // event can trigger a new note on or note off event
47       * used to render and mix all voices to. This method is responsible for          if (pChannel->pInstrument) {
48       * copying the audio data from those local buffers to the master audio  
49       * output channels as well as to the FX send audio output channels with              ::gig::MidiRule* rule;
50       * their respective FX send levels.              for (int i = 0 ; (rule = pChannel->pInstrument->GetMidiRule(i)) ; i++) {
51       *  
52       * @param pEngineChannel - engine channel from which audio should be                  if (::gig::MidiRuleCtrlTrigger* ctrlTrigger =
53       *                         routed                      dynamic_cast< ::gig::MidiRuleCtrlTrigger*>(rule)) {
54       * @param Samples        - amount of sample points to be routed in                      if (itControlChangeEvent->Param.CC.Controller ==
55       *                         this audio fragment cycle                          ctrlTrigger->ControllerNumber) {
56       */  
57      void Engine::RouteAudio(EngineChannel* pEngineChannel, uint Samples) {                          uint8_t oldCCValue = pChannel->ControllerTable[
58          // route master signal                              itControlChangeEvent->Param.CC.Controller];
59          {                          uint8_t newCCValue = itControlChangeEvent->Param.CC.Value;
60              AudioChannel* pDstL = pAudioOutputDevice->Channel(pEngineChannel->AudioDeviceChannelLeft);  
61              AudioChannel* pDstR = pAudioOutputDevice->Channel(pEngineChannel->AudioDeviceChannelRight);                          for (int i = 0 ; i < ctrlTrigger->Triggers ; i++) {
62              pEngineChannel->pChannelLeft->MixTo(pDstL, Samples);                              ::gig::MidiRuleCtrlTrigger::trigger_t* pTrigger =
63              pEngineChannel->pChannelRight->MixTo(pDstR, Samples);                                    &ctrlTrigger->pTriggers[i];
64          }  
65          // route FX send signal                              // check if the controller has passed the
66          {                              // trigger point in the right direction
67              for (int iFxSend = 0; iFxSend < pEngineChannel->GetFxSendCount(); iFxSend++) {                              if ((pTrigger->Descending &&
68                  FxSend* pFxSend = pEngineChannel->GetFxSend(iFxSend);                                   oldCCValue > pTrigger->TriggerPoint &&
69                  // left channel                                   newCCValue <= pTrigger->TriggerPoint) ||
70                  const int iDstL = pFxSend->DestinationChannel(0);                                  (!pTrigger->Descending &&
71                  if (iDstL < 0) {                                   oldCCValue < pTrigger->TriggerPoint &&
72                      dmsg(1,("Engine::RouteAudio() Error: invalid FX send (L) destination channel"));                                   newCCValue >= pTrigger->TriggerPoint)) {
73                  } else {  
74                      AudioChannel* pDstL = pAudioOutputDevice->Channel(iDstL);                                  RTList<Event>::Iterator itNewEvent = pGlobalEvents->allocAppend();
75                      if (!pDstL) {                                  if (itNewEvent) {
76                          dmsg(1,("Engine::RouteAudio() Error: invalid FX send (L) destination channel"));                                      *itNewEvent = *itControlChangeEvent;
77                      } else pEngineChannel->pChannelLeft->MixTo(pDstL, Samples, pFxSend->Level());                                      itNewEvent->Param.Note.Key = pTrigger->Key;
78                  }  
79                  // right channel                                      if (pTrigger->NoteOff || pTrigger->Velocity == 0) {
80                  const int iDstR = pFxSend->DestinationChannel(1);                                          itNewEvent->Type = Event::type_note_off;
81                  if (iDstR < 0) {                                          itNewEvent->Param.Note.Velocity = 100;
82                      dmsg(1,("Engine::RouteAudio() Error: invalid FX send (R) destination channel"));  
83                  } else {                                          ProcessNoteOff(pEngineChannel, itNewEvent);
84                      AudioChannel* pDstR = pAudioOutputDevice->Channel(iDstR);                                      } else {
85                      if (!pDstR) {                                          itNewEvent->Type = Event::type_note_on;
86                          dmsg(1,("Engine::RouteAudio() Error: invalid FX send (R) destination channel"));                                          //TODO: if Velocity is 255, the triggered velocity should
87                      } else pEngineChannel->pChannelRight->MixTo(pDstR, Samples, pFxSend->Level());                                          // depend on how fast the controller is moving
88                  }                                          itNewEvent->Param.Note.Velocity =
89              }                                              pTrigger->Velocity == 255 ? 100 :
90          }                                              pTrigger->Velocity;
         // reset buffers with silence (zero out) for the next audio cycle  
         pEngineChannel->pChannelLeft->Clear();  
         pEngineChannel->pChannelRight->Clear();  
     }  
91    
92      /**                                          ProcessNoteOn(pEngineChannel, itNewEvent);
93       * Free all keys which have turned inactive in this audio fragment, from                                      }
94       * the list of active keys and clear all event lists on that engine                                  }
95       * channel.                                  else dmsg(1,("Event pool emtpy!\n"));
96       *                              }
      * @param pEngineChannel - engine channel to cleanup  
      */  
     void Engine::PostProcess(EngineChannel* pEngineChannel) {  
         // free all keys which have no active voices left  
         {  
             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;  
                 if (pKey->pActiveVoices->isEmpty()) FreeKey(pEngineChannel, pKey);  
                 #if CONFIG_DEVMODE  
                 else { // just a sanity check for debugging  
                     RTList<Voice>::Iterator itVoice     = pKey->pActiveVoices->first();  
                     RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end();  
                     for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key  
                         if (itVoice->itKillEvent) {  
                             dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n"));  
97                          }                          }
98                      }                      }
99                  }                  }
                 #endif // CONFIG_DEVMODE  
100              }              }
101          }          }
102    
103          // empty the engine channel's own event lists          // update controller value in the engine channel's controller table
104          pEngineChannel->ClearEventLists();          pChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;
     }  
105    
106      /**          ProcessHardcodedControllers(pEngineChannel, itControlChangeEvent);
      *  Will be called by the MIDI input device whenever a MIDI system  
      *  exclusive message has arrived.  
      *  
      *  @param pData - pointer to sysex data  
      *  @param Size  - lenght of sysex data (in bytes)  
      */  
     void Engine::SendSysex(void* pData, uint Size) {  
         Event event             = pEventGenerator->CreateEvent();  
         event.Type              = Event::type_sysex;  
         event.Param.Sysex.Size  = Size;  
         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;  
107    
108                  }          // handle FX send controllers
109                  // finally place sysex event into input event queue          ProcessFxSendControllers(pChannel, itControlChangeEvent);
                 pEventQueue->push(&event);  
             }  
             else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,CONFIG_SYSEX_BUFFER_SIZE));  
         }  
         else dmsg(1,("Engine: Input event queue full!"));  
110      }      }
111    
112      /**      DiskThread* Engine::CreateDiskThread() {
113       *  Assigns and triggers a new voice for the respective MIDI key.          return new DiskThread (
114       *              iMaxDiskStreams,
115       *  @param pEngineChannel - engine channel on which this event occured on              ((pAudioOutputDevice->MaxSamplesPerCycle() << CONFIG_MAX_PITCH) << 1) + 6, //FIXME: assuming stereo
116       *  @param itNoteOnEvent - key, velocity and time stamp of the event              &instruments
117       */          );
118      void Engine::ProcessNoteOn(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {      }
119          #if !CONFIG_PROCESS_MUTED_CHANNELS  
120          if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted      void Engine::TriggerNewVoices (
121          #endif          LinuxSampler::EngineChannel* pEngineChannel,
122            RTList<Event>::Iterator&     itNoteOnEvent,
123          if (!pEngineChannel->pInstrument) return; // ignore if no instrument loaded          bool                         HandleKeyGroupConflicts
124        ) {
125          //HACK: we should better add the transpose value only to the most mandatory places (like for retrieving the region and calculating the tuning), because otherwise voices will unintendedly survive when changing transpose while playing          EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
126          itNoteOnEvent->Param.Note.Key += pEngineChannel->GlobalTranspose;          // first, get total amount of required voices (dependant on amount of layers)
127            ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(itNoteOnEvent->Param.Note.Key);
128          const int key = itNoteOnEvent->Param.Note.Key;          if (pRegion && !RegionSuspended(pRegion)) {
129          midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[key];              int voicesRequired = pRegion->Layers;
130                // now launch the required amount of voices
131          // move note on event to the key's own event list              for (int i = 0; i < voicesRequired; i++)
132          RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents);                  LaunchVoice(pChannel, itNoteOnEvent, i, false, true, HandleKeyGroupConflicts);
   
         // if Solo Mode then kill all already active voices  
         if (pEngineChannel->SoloMode) {  
             Pool<uint>::Iterator itYoungestKey = pEngineChannel->pActiveKeys->last();  
             if (itYoungestKey) {  
                 const int iYoungestKey = *itYoungestKey;  
                 const midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[iYoungestKey];  
                 if (pOtherKey->Active) {  
                     // get final portamento position of currently active voice  
                     if (pEngineChannel->PortamentoMode) {  
                         RTList<Voice>::Iterator itVoice = pOtherKey->pActiveVoices->last();  
                         if (itVoice) itVoice->UpdatePortamentoPos(itNoteOnEventOnKeyList);  
                     }  
                     // 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(itNoteOnEventOnKeyList);  
                     }  
                 }  
             }  
             // set this key as 'currently active solo key'  
             pEngineChannel->SoloKey = key;  
         }  
   
         // Change key dimension value if key is in keyswitching area  
         {  
             const ::gig::Instrument* pInstrument = pEngineChannel->pInstrument;  
             if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high)  
                 pEngineChannel->CurrentKeyDimension = float(key - pInstrument->DimensionKeyRange.low) /  
                     (pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1);  
         }  
   
         pKey->KeyPressed = true; // the MIDI key was now pressed down  
         pKey->Velocity   = itNoteOnEventOnKeyList->Param.Note.Velocity;  
         pKey->NoteOnTime = FrameTime + itNoteOnEventOnKeyList->FragmentPos(); // will be used to calculate note length  
   
         // cancel release process of voices on this key if needed  
         if (pKey->Active && !pEngineChannel->SustainPedal) {  
             RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend();  
             if (itCancelReleaseEvent) {  
                 *itCancelReleaseEvent = *itNoteOnEventOnKeyList;         // copy event  
                 itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type  
             }  
             else dmsg(1,("Event pool emtpy!\n"));  
133          }          }
   
         // allocate and trigger new voice(s) for the key  
         {  
             // first, get total amount of required voices (dependant on amount of layers)  
             ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(itNoteOnEventOnKeyList->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, itNoteOnEventOnKeyList, i, false, true, true);  
             }  
         }  
   
         // if neither a voice was spawned or postponed then remove note on event from key again  
         if (!pKey->Active && !pKey->VoiceTheftsQueued)  
             pKey->pEvents->free(itNoteOnEventOnKeyList);  
   
         if (!pEngineChannel->SoloMode || pEngineChannel->PortamentoPos < 0.0f) pEngineChannel->PortamentoPos = (float) key;  
         pKey->RoundRobinIndex++;  
134      }      }
135    
136      /**      void Engine::TriggerReleaseVoices (
137       *  Releases the voices on the given key if sustain pedal is not pressed.          LinuxSampler::EngineChannel*  pEngineChannel,
138       *  If sustain is pressed, the release of the note will be postponed until          RTList<Event>::Iterator&      itNoteOffEvent
139       *  sustain pedal will be released or voice turned inactive by itself (e.g.      ) {
140       *  due to completion of sample playback).          EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
141       *          MidiKey* pKey = &pChannel->pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key];
142       *  @param pEngineChannel - engine channel on which this event occured on          // first, get total amount of required voices (dependant on amount of layers)
143       *  @param itNoteOffEvent - key, velocity and time stamp of the event          ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(itNoteOffEvent->Param.Note.Key);
144       */          if (pRegion) {
145      void Engine::ProcessNoteOff(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOffEvent) {              int voicesRequired = pRegion->Layers;
146          #if !CONFIG_PROCESS_MUTED_CHANNELS  
147          if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted              // MIDI note-on velocity is used instead of note-off velocity
148          #endif              itNoteOffEvent->Param.Note.Velocity = pKey->Velocity;
149    
150          //HACK: we should better add the transpose value only to the most mandatory places (like for retrieving the region and calculating the tuning), because otherwise voices will unintendedly survive when changing transpose while playing              // now launch the required amount of voices
151          itNoteOffEvent->Param.Note.Key += pEngineChannel->GlobalTranspose;              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
         const int iKey = itNoteOffEvent->Param.Note.Key;  
         midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[iKey];  
         pKey->KeyPressed = false; // the MIDI key was now released  
   
         // move event to the key's own event list  
         RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents);  
   
         bool bShouldRelease = pKey->Active && ShouldReleaseVoice(pEngineChannel, itNoteOffEventOnKeyList->Param.Note.Key);  
   
         // in case Solo Mode is enabled, kill all voices on this key and respawn a voice on the highest pressed key (if any)  
         if (pEngineChannel->SoloMode && pEngineChannel->pInstrument) { //TODO: this feels like too much code just for handling solo mode :P  
             bool bOtherKeysPressed = false;  
             if (iKey == pEngineChannel->SoloKey) {  
                 pEngineChannel->SoloKey = -1;  
                 // if there's still a key pressed down, respawn a voice (group) on the highest key  
                 for (int i = 127; i > 0; i--) {  
                     midi_key_info_t* pOtherKey = &pEngineChannel->pMIDIKeyInfo[i];  
                     if (pOtherKey->KeyPressed) {  
                         bOtherKeysPressed = true;  
                         // make the other key the new 'currently active solo key'  
                         pEngineChannel->SoloKey = i;  
                         // get final portamento position of currently active voice  
                         if (pEngineChannel->PortamentoMode) {  
                             RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first();  
                             if (itVoice) itVoice->UpdatePortamentoPos(itNoteOffEventOnKeyList);  
                         }  
                         // create a pseudo note on event  
                         RTList<Event>::Iterator itPseudoNoteOnEvent = pOtherKey->pEvents->allocAppend();  
                         if (itPseudoNoteOnEvent) {  
                             // copy event  
                             *itPseudoNoteOnEvent = *itNoteOffEventOnKeyList;  
                             // transform event to a note on event  
                             itPseudoNoteOnEvent->Type                = Event::type_note_on;  
                             itPseudoNoteOnEvent->Param.Note.Key      = i;  
                             itPseudoNoteOnEvent->Param.Note.Velocity = pOtherKey->Velocity;  
                             // allocate and trigger new voice(s) for the other key  
                             {  
                                 // first, get total amount of required voices (dependant on amount of layers)  
                                 ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(i);  
                                 if (pRegion) {  
                                     int voicesRequired = pRegion->Layers;  
                                     // now launch the required amount of voices  
                                     for (int iLayer = 0; iLayer < voicesRequired; iLayer++)  
                                         LaunchVoice(pEngineChannel, itPseudoNoteOnEvent, iLayer, false, true, false);  
                                 }  
                             }  
                             // if neither a voice was spawned or postponed then remove note on event from key again  
                             if (!pOtherKey->Active && !pOtherKey->VoiceTheftsQueued)  
                                 pOtherKey->pEvents->free(itPseudoNoteOnEvent);  
   
                         } else dmsg(1,("Could not respawn voice, no free event left\n"));  
                         break; // done  
                     }  
                 }  
             }  
             if (bOtherKeysPressed) {  
                 if (pKey->Active) { // kill all voices on this key  
                     bShouldRelease = false; // no need to release, as we kill it here  
                     RTList<Voice>::Iterator itVoiceToBeKilled = pKey->pActiveVoices->first();  
                     RTList<Voice>::Iterator end               = pKey->pActiveVoices->end();  
                     for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) {  
                         if (itVoiceToBeKilled->Type != Voice::type_release_trigger)  
                             itVoiceToBeKilled->Kill(itNoteOffEventOnKeyList);  
                     }  
                 }  
             } else pEngineChannel->PortamentoPos = -1.0f;  
         }  
   
         // if no solo mode (the usual case) or if solo mode and no other key pressed, then release voices on this key if needed  
         if (bShouldRelease) {  
             itNoteOffEventOnKeyList->Type = Event::type_release; // transform event type  
   
             // spawn release triggered voice(s) if needed  
             if (pKey->ReleaseTrigger && pEngineChannel->pInstrument) {  
                 // 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;  
   
                     // MIDI note-on velocity is used instead of note-off velocity  
                     itNoteOffEventOnKeyList->Param.Note.Velocity = pKey->Velocity;  
   
                     // now launch the required amount of voices  
                     for (int i = 0; i < voicesRequired; i++)  
                         LaunchVoice(pEngineChannel, itNoteOffEventOnKeyList, i, true, false, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples  
                 }  
                 pKey->ReleaseTrigger = false;  
             }  
153          }          }
   
         // if neither a voice was spawned or postponed on this key then remove note off event from key again  
         if (!pKey->Active && !pKey->VoiceTheftsQueued)  
             pKey->pEvents->free(itNoteOffEventOnKeyList);  
     }  
   
     /**  
      *  Moves pitchbend event from the general (input) event list to the engine  
      *  channel's event list. It will actually processed later by the  
      *  respective voice.  
      *  
      *  @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  
154      }      }
155    
156      /**      Pool<Voice>::Iterator Engine::LaunchVoice (
157       *  Allocates and triggers a new voice. This method will usually be          LinuxSampler::EngineChannel*  pEngineChannel,
158       *  called by the ProcessNoteOn() method and by the voices itself          Pool<Event>::Iterator&        itNoteOnEvent,
159       *  (e.g. to spawn further voices on the same key for layered sounds).          int                           iLayer,
160       *          bool                          ReleaseTriggerVoice,
161       *  @param pEngineChannel      - engine channel on which this event occured on          bool                          VoiceStealing,
162       *  @param itNoteOnEvent       - key, velocity and time stamp of the event          bool                          HandleKeyGroupConflicts
163       *  @param iLayer              - layer index for the new voice (optional - only      ) {
164       *                               in case of layered sounds of course)          EngineChannel* pChannel = static_cast<EngineChannel*>(pEngineChannel);
165       *  @param ReleaseTriggerVoice - if new voice is a release triggered voice          int MIDIKey = itNoteOnEvent->Param.Note.Key;
166       *                               (optional, default = false)          EngineChannel::MidiKey* pKey  = &pChannel->pMIDIKeyInfo[MIDIKey];
167       *  @param VoiceStealing       - if voice stealing should be performed          ::gig::Region* pRegion = pChannel->pInstrument->GetRegion(MIDIKey);
      *                               when there is no free voice  
      *                               (optional, default = true)  
      *  @param HandleKeyGroupConflicts - if voices should be killed due to a  
      *                                   key group conflict  
      *  @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, bool HandleKeyGroupConflicts) {  
         int MIDIKey            = itNoteOnEvent->Param.Note.Key;  
         midi_key_info_t* pKey  = &pEngineChannel->pMIDIKeyInfo[MIDIKey];  
         ::gig::Region* pRegion = pEngineChannel->pInstrument->GetRegion(MIDIKey);  
168    
169          // if nothing defined for this key          // if nothing defined for this key
170          if (!pRegion) return Pool<Voice>::Iterator(); // nothing to do          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          int iKeyGroup = pRegion->KeyGroup;
173          // key group, so the layered voices won't kill each other          // only need to send a group event from the first voice in a layered region,
174          int iKeyGroup = (iLayer == 0 && !ReleaseTriggerVoice) ? pRegion->KeyGroup : 0;          // as all layers in a region always belongs to the same key group
175            if (HandleKeyGroupConflicts && iLayer == 0) pChannel->HandleKeyGroupConflicts(iKeyGroup, itNoteOnEvent);
         // handle key group (a.k.a. exclusive group) conflicts  
         if (HandleKeyGroupConflicts) {  
             if (iKeyGroup) { // if this voice / key belongs to a key group  
                 uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[iKeyGroup];  
                 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);  
                             --VoiceSpawnsLeft; //FIXME: just a hack, we should better check in StealVoice() if the voice was killed due to key conflict  
                         }  
                     }  
                 }  
             }  
         }  
176    
177          Voice::type_t VoiceType = Voice::type_normal;          Voice::type_t VoiceType = Voice::type_normal;
178    
# Line 978  namespace LinuxSampler { namespace gig { Line 192  namespace LinuxSampler { namespace gig {
192                      DimValues[i] = itNoteOnEvent->Param.Note.Velocity;                      DimValues[i] = itNoteOnEvent->Param.Note.Velocity;
193                      break;                      break;
194                  case ::gig::dimension_channelaftertouch:                  case ::gig::dimension_channelaftertouch:
195                      DimValues[i] = pEngineChannel->ControllerTable[128];                      DimValues[i] = pChannel->ControllerTable[128];
196                      break;                      break;
197                  case ::gig::dimension_releasetrigger:                  case ::gig::dimension_releasetrigger:
198                      VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;                      VoiceType = (ReleaseTriggerVoice) ? Voice::type_release_trigger : (!iLayer) ? Voice::type_release_trigger_required : Voice::type_normal;
199                      DimValues[i] = (uint) ReleaseTriggerVoice;                      DimValues[i] = (uint) ReleaseTriggerVoice;
200                      break;                      break;
201                  case ::gig::dimension_keyboard:                  case ::gig::dimension_keyboard:
202                      DimValues[i] = (uint) (pEngineChannel->CurrentKeyDimension * pRegion->pDimensionDefinitions[i].zones);                      DimValues[i] = (uint) (pChannel->CurrentKeyDimension * pRegion->pDimensionDefinitions[i].zones);
203                      break;                      break;
204                  case ::gig::dimension_roundrobin:                  case ::gig::dimension_roundrobin:
205                      DimValues[i] = (uint) pEngineChannel->pMIDIKeyInfo[MIDIKey].RoundRobinIndex; // incremented for each note on                      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;                      break;
210                  case ::gig::dimension_random:                  case ::gig::dimension_random:
211                      RandomSeed   = RandomSeed * 1103515245 + 12345; // classic pseudo random number generator                      DimValues[i] = uint(Random() * pRegion->pDimensionDefinitions[i].zones);
                     DimValues[i] = (uint) RandomSeed >> (32 - pRegion->pDimensionDefinitions[i].bits); // highest bits are most random  
212                      break;                      break;
213                  case ::gig::dimension_modwheel:                  case ::gig::dimension_modwheel:
214                      DimValues[i] = pEngineChannel->ControllerTable[1];                      DimValues[i] = pChannel->ControllerTable[1];
215                      break;                      break;
216                  case ::gig::dimension_breath:                  case ::gig::dimension_breath:
217                      DimValues[i] = pEngineChannel->ControllerTable[2];                      DimValues[i] = pChannel->ControllerTable[2];
218                      break;                      break;
219                  case ::gig::dimension_foot:                  case ::gig::dimension_foot:
220                      DimValues[i] = pEngineChannel->ControllerTable[4];                      DimValues[i] = pChannel->ControllerTable[4];
221                      break;                      break;
222                  case ::gig::dimension_portamentotime:                  case ::gig::dimension_portamentotime:
223                      DimValues[i] = pEngineChannel->ControllerTable[5];                      DimValues[i] = pChannel->ControllerTable[5];
224                      break;                      break;
225                  case ::gig::dimension_effect1:                  case ::gig::dimension_effect1:
226                      DimValues[i] = pEngineChannel->ControllerTable[12];                      DimValues[i] = pChannel->ControllerTable[12];
227                      break;                      break;
228                  case ::gig::dimension_effect2:                  case ::gig::dimension_effect2:
229                      DimValues[i] = pEngineChannel->ControllerTable[13];                      DimValues[i] = pChannel->ControllerTable[13];
230                      break;                      break;
231                  case ::gig::dimension_genpurpose1:                  case ::gig::dimension_genpurpose1:
232                      DimValues[i] = pEngineChannel->ControllerTable[16];                      DimValues[i] = pChannel->ControllerTable[16];
233                      break;                      break;
234                  case ::gig::dimension_genpurpose2:                  case ::gig::dimension_genpurpose2:
235                      DimValues[i] = pEngineChannel->ControllerTable[17];                      DimValues[i] = pChannel->ControllerTable[17];
236                      break;                      break;
237                  case ::gig::dimension_genpurpose3:                  case ::gig::dimension_genpurpose3:
238                      DimValues[i] = pEngineChannel->ControllerTable[18];                      DimValues[i] = pChannel->ControllerTable[18];
239                      break;                      break;
240                  case ::gig::dimension_genpurpose4:                  case ::gig::dimension_genpurpose4:
241                      DimValues[i] = pEngineChannel->ControllerTable[19];                      DimValues[i] = pChannel->ControllerTable[19];
242                      break;                      break;
243                  case ::gig::dimension_sustainpedal:                  case ::gig::dimension_sustainpedal:
244                      DimValues[i] = pEngineChannel->ControllerTable[64];                      DimValues[i] = pChannel->ControllerTable[64];
245                      break;                      break;
246                  case ::gig::dimension_portamento:                  case ::gig::dimension_portamento:
247                      DimValues[i] = pEngineChannel->ControllerTable[65];                      DimValues[i] = pChannel->ControllerTable[65];
248                      break;                      break;
249                  case ::gig::dimension_sostenutopedal:                  case ::gig::dimension_sostenutopedal:
250                      DimValues[i] = pEngineChannel->ControllerTable[66];                      DimValues[i] = pChannel->ControllerTable[66];
251                      break;                      break;
252                  case ::gig::dimension_softpedal:                  case ::gig::dimension_softpedal:
253                      DimValues[i] = pEngineChannel->ControllerTable[67];                      DimValues[i] = pChannel->ControllerTable[67];
254                      break;                      break;
255                  case ::gig::dimension_genpurpose5:                  case ::gig::dimension_genpurpose5:
256                      DimValues[i] = pEngineChannel->ControllerTable[80];                      DimValues[i] = pChannel->ControllerTable[80];
257                      break;                      break;
258                  case ::gig::dimension_genpurpose6:                  case ::gig::dimension_genpurpose6:
259                      DimValues[i] = pEngineChannel->ControllerTable[81];                      DimValues[i] = pChannel->ControllerTable[81];
260                      break;                      break;
261                  case ::gig::dimension_genpurpose7:                  case ::gig::dimension_genpurpose7:
262                      DimValues[i] = pEngineChannel->ControllerTable[82];                      DimValues[i] = pChannel->ControllerTable[82];
263                      break;                      break;
264                  case ::gig::dimension_genpurpose8:                  case ::gig::dimension_genpurpose8:
265                      DimValues[i] = pEngineChannel->ControllerTable[83];                      DimValues[i] = pChannel->ControllerTable[83];
266                      break;                      break;
267                  case ::gig::dimension_effect1depth:                  case ::gig::dimension_effect1depth:
268                      DimValues[i] = pEngineChannel->ControllerTable[91];                      DimValues[i] = pChannel->ControllerTable[91];
269                      break;                      break;
270                  case ::gig::dimension_effect2depth:                  case ::gig::dimension_effect2depth:
271                      DimValues[i] = pEngineChannel->ControllerTable[92];                      DimValues[i] = pChannel->ControllerTable[92];
272                      break;                      break;
273                  case ::gig::dimension_effect3depth:                  case ::gig::dimension_effect3depth:
274                      DimValues[i] = pEngineChannel->ControllerTable[93];                      DimValues[i] = pChannel->ControllerTable[93];
275                      break;                      break;
276                  case ::gig::dimension_effect4depth:                  case ::gig::dimension_effect4depth:
277                      DimValues[i] = pEngineChannel->ControllerTable[94];                      DimValues[i] = pChannel->ControllerTable[94];
278                      break;                      break;
279                  case ::gig::dimension_effect5depth:                  case ::gig::dimension_effect5depth:
280                      DimValues[i] = pEngineChannel->ControllerTable[95];                      DimValues[i] = pChannel->ControllerTable[95];
281                      break;                      break;
282                  case ::gig::dimension_none:                  case ::gig::dimension_none:
283                      std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;                      std::cerr << "gig::Engine::LaunchVoice() Error: dimension=none\n" << std::flush;
# Line 1083  namespace LinuxSampler { namespace gig { Line 299  namespace LinuxSampler { namespace gig {
299    
300          // allocate a new voice for the key          // allocate a new voice for the key
301          Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();          Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend();
         if (itNewVoice) {  
             // launch the new voice  
             if (itNewVoice->Trigger(pEngineChannel, itNoteOnEvent, pEngineChannel->Pitch, pDimRgn, VoiceType, iKeyGroup) < 0) {  
                 dmsg(4,("Voice not triggered\n"));  
                 pKey->pActiveVoices->free(itNewVoice);  
             }  
             else { // on success  
                 --VoiceSpawnsLeft;  
                 if (!pKey->Active) { // mark as active key  
                     pKey->Active = true;  
                     pKey->itSelf = pEngineChannel->pActiveKeys->allocAppend();  
                     *pKey->itSelf = itNoteOnEvent->Param.Note.Key;  
                 }  
                 if (itNewVoice->KeyGroup) {  
                     uint** ppKeyGroup = &pEngineChannel->ActiveKeyGroups[itNewVoice->KeyGroup];  
                     *ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group  
                 }  
                 if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s)  
                 return itNewVoice; // success  
             }  
         }  
         else if (VoiceStealing) {  
             // try to steal one voice  
             int result = StealVoice(pEngineChannel, itNoteOnEvent);  
             if (!result) { // voice stolen successfully  
                 // put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died  
                 RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend();  
                 if (itStealEvent) {  
                     *itStealEvent = *itNoteOnEvent; // copy event  
                     itStealEvent->Param.Note.Layer = iLayer;  
                     itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice;  
                     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  
      *  @returns 0 on success, a value < 0 if no active voice could be picked for voice stealing  
      */  
     int Engine::StealVoice(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent) {  
         if (VoiceSpawnsLeft <= 0) {  
             dmsg(1,("Max. voice thefts per audio fragment reached (you may raise CONFIG_MAX_VOICES).\n"));  
             return -1;  
         }  
         if (!pEventPool->poolIsEmpty()) {  
   
             RTList<Voice>::Iterator itSelectedVoice;  
   
             // Select one voice for voice stealing  
             switch (CONFIG_VOICE_STEAL_ALGO) {  
   
                 // 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, then procceed with  
                 // 'oldestkey' algorithm  
                 case voice_steal_algo_oldestvoiceonkey: {  
                     midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key];  
                     itSelectedVoice = pSelectedKey->pActiveVoices->first();  
                     // proceed iterating if voice was created in this fragment cycle  
                     while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;  
                     // if we haven't found a voice then proceed with algorithm 'oldestkey'  
                     if (itSelectedVoice && itSelectedVoice->IsStealable()) break;  
                 } // no break - intentional !  
   
                 // try to pick the oldest voice on the oldest active key  
                 // from the same engine channel  
                 // (caution: must stay after 'oldestvoiceonkey' algorithm !)  
                 case voice_steal_algo_oldestkey: {  
                     // if we already stole in this fragment, try to proceed on same key  
                     if (this->itLastStolenVoice) {  
                         itSelectedVoice = this->itLastStolenVoice;  
                         do {  
                             ++itSelectedVoice;  
                         } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle  
                         // found a "stealable" voice ?  
                         if (itSelectedVoice && itSelectedVoice->IsStealable()) {  
                             // remember which voice we stole, so we can simply proceed on next voice stealing  
                             this->itLastStolenVoice = itSelectedVoice;  
                             break; // selection succeeded  
                         }  
                     }  
                     // get (next) oldest key  
                     RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKey) ? ++this->iuiLastStolenKey : pEngineChannel->pActiveKeys->first();  
                     while (iuiSelectedKey) {  
                         midi_key_info_t* pSelectedKey = &pEngineChannel->pMIDIKeyInfo[*iuiSelectedKey];  
                         itSelectedVoice = pSelectedKey->pActiveVoices->first();  
                         // proceed iterating if voice was created in this fragment cycle  
                         while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;  
                         // found a "stealable" voice ?  
                         if (itSelectedVoice && itSelectedVoice->IsStealable()) {  
                             // remember which voice on which key we stole, so we can simply proceed on next voice stealing  
                             this->iuiLastStolenKey  = iuiSelectedKey;  
                             this->itLastStolenVoice = itSelectedVoice;  
                             break; // selection succeeded  
                         }  
                         ++iuiSelectedKey; // get next oldest key  
                     }  
                     break;  
                 }  
   
                 // don't steal anything  
                 case voice_steal_algo_none:  
                 default: {  
                     dmsg(1,("No free voice (voice stealing disabled)!\n"));  
                     return -1;  
                 }  
             }  
   
             // if we couldn't steal a voice from the same engine channel then  
             // steal oldest voice on the oldest key from any other engine channel  
             // (the smaller engine channel number, the higher priority)  
             if (!itSelectedVoice || !itSelectedVoice->IsStealable()) {  
                 EngineChannel* pSelectedChannel;  
                 int            iChannelIndex;  
                 // select engine channel  
                 if (pLastStolenChannel) {  
                     pSelectedChannel = pLastStolenChannel;  
                     iChannelIndex    = pSelectedChannel->iEngineIndexSelf;  
                 } else { // pick the engine channel followed by this engine channel  
                     iChannelIndex    = (pEngineChannel->iEngineIndexSelf + 1) % engineChannels.size();  
                     pSelectedChannel = engineChannels[iChannelIndex];  
                 }  
   
                 // if we already stole in this fragment, try to proceed on same key  
                 if (this->itLastStolenVoiceGlobally) {  
                     itSelectedVoice = this->itLastStolenVoiceGlobally;  
                     do {  
                         ++itSelectedVoice;  
                     } while (itSelectedVoice && !itSelectedVoice->IsStealable()); // proceed iterating if voice was created in this fragment cycle  
                 }  
   
                 #if CONFIG_DEVMODE  
                 EngineChannel* pBegin = pSelectedChannel; // to detect endless loop  
                 #endif // CONFIG_DEVMODE  
   
                 // did we find a 'stealable' voice?  
                 if (itSelectedVoice && itSelectedVoice->IsStealable()) {  
                     // remember which voice we stole, so we can simply proceed on next voice stealing  
                     this->itLastStolenVoiceGlobally = itSelectedVoice;  
                 } else while (true) { // iterate through engine channels  
                     // get (next) oldest key  
                     RTList<uint>::Iterator iuiSelectedKey = (this->iuiLastStolenKeyGlobally) ? ++this->iuiLastStolenKeyGlobally : pSelectedChannel->pActiveKeys->first();  
                     this->iuiLastStolenKeyGlobally = RTList<uint>::Iterator(); // to prevent endless loop (see line above)  
                     while (iuiSelectedKey) {  
                         midi_key_info_t* pSelectedKey = &pSelectedChannel->pMIDIKeyInfo[*iuiSelectedKey];  
                         itSelectedVoice = pSelectedKey->pActiveVoices->first();  
                         // proceed iterating if voice was created in this fragment cycle  
                         while (itSelectedVoice && !itSelectedVoice->IsStealable()) ++itSelectedVoice;  
                         // found a "stealable" voice ?  
                         if (itSelectedVoice && itSelectedVoice->IsStealable()) {  
                             // remember which voice on which key on which engine channel we stole, so we can simply proceed on next voice stealing  
                             this->iuiLastStolenKeyGlobally  = iuiSelectedKey;  
                             this->itLastStolenVoiceGlobally = itSelectedVoice;  
                             this->pLastStolenChannel        = pSelectedChannel;  
                             goto stealable_voice_found; // selection succeeded  
                         }  
                         ++iuiSelectedKey; // get next key on current engine channel  
                     }  
                     // get next engine channel  
                     iChannelIndex    = (iChannelIndex + 1) % engineChannels.size();  
                     pSelectedChannel = engineChannels[iChannelIndex];  
   
                     #if CONFIG_DEVMODE  
                     if (pSelectedChannel == pBegin) {  
                         dmsg(1,("FATAL ERROR: voice stealing endless loop!\n"));  
                         dmsg(1,("VoiceSpawnsLeft=%d.\n", VoiceSpawnsLeft));  
                         dmsg(1,("Exiting.\n"));  
                         exit(-1);  
                     }  
                     #endif // CONFIG_DEVMODE  
                 }  
             }  
   
             // jump point if a 'stealable' voice was found  
             stealable_voice_found:  
   
             #if CONFIG_DEVMODE  
             if (!itSelectedVoice->IsActive()) {  
                 dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n"));  
                 return -1;  
             }  
             #endif // CONFIG_DEVMODE  
   
             // now kill the selected voice  
             itSelectedVoice->Kill(itNoteOnEvent);  
   
             --VoiceSpawnsLeft;  
   
             return 0; // success  
         }  
         else {  
             dmsg(1,("Event pool emtpy!\n"));  
             return -1;  
         }  
     }  
   
     /**  
      *  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;  
   
             // if the sample and dimension region belong to an  
             // instrument that is unloaded, tell the disk thread to  
             // release them  
             if (itVoice->Orphan) {  
                 pDiskThread->OrderDeletionOfDimreg(itVoice->pDimRgn);  
             }  
   
             // 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));  
   
         // update controller value in the engine channel's controller table  
         pEngineChannel->ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value;  
   
         // handle hard coded MIDI controllers  
         switch (itControlChangeEvent->Param.CC.Controller) {  
             case 5: { // portamento time  
                 pEngineChannel->PortamentoTime = (float) itControlChangeEvent->Param.CC.Value / 127.0f * (float) CONFIG_PORTAMENTO_TIME_MAX + (float) CONFIG_PORTAMENTO_TIME_MIN;  
                 break;  
             }  
             case 6: { // data entry (currently only used for RPN controllers)  
                 if (pEngineChannel->GetMidiRpnController() == 2) { // coarse tuning in half tones  
                     int transpose = (int) itControlChangeEvent->Param.CC.Value - 64;  
                     // limit to +- two octaves for now  
                     transpose = RTMath::Min(transpose,  24);  
                     transpose = RTMath::Max(transpose, -24);  
                     pEngineChannel->GlobalTranspose = transpose;  
                     // workaround, so we won't have hanging notes  
                     ReleaseAllVoices(pEngineChannel, itControlChangeEvent);  
                 }  
                 break;  
             }  
             case 7: { // volume  
                 //TODO: not sample accurate yet  
                 pEngineChannel->MidiVolume = VolumeCurve[itControlChangeEvent->Param.CC.Value];  
                 pEngineChannel->bStatusChanged = true; // engine channel status has changed, so set notify flag  
                 break;  
             }  
             case 10: { // panpot  
                 //TODO: not sample accurate yet  
                 pEngineChannel->GlobalPanLeft  = PanCurve[128 - itControlChangeEvent->Param.CC.Value];  
                 pEngineChannel->GlobalPanRight = PanCurve[itControlChangeEvent->Param.CC.Value];  
                 break;  
             }  
             case 64: { // sustain  
                 if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SustainPedal) {  
                     dmsg(4,("DAMPER (RIGHT) PEDAL DOWN\n"));  
                     pEngineChannel->SustainPedal = true;  
   
                     #if !CONFIG_PROCESS_MUTED_CHANNELS  
                     if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted  
                     #endif  
   
                     // cancel release process of voices if necessary  
                     RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();  
                     for (; iuiKey; ++iuiKey) {  
                         midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];  
                         if (!pKey->KeyPressed) {  
                             RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();  
                             if (itNewEvent) {  
                                 *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list  
                                 itNewEvent->Type = Event::type_cancel_release; // transform event type  
                             }  
                             else dmsg(1,("Event pool emtpy!\n"));  
                         }  
                     }  
                 }  
                 if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SustainPedal) {  
                     dmsg(4,("DAMPER (RIGHT) PEDAL UP\n"));  
                     pEngineChannel->SustainPedal = false;  
   
                     #if !CONFIG_PROCESS_MUTED_CHANNELS  
                     if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted  
                     #endif  
   
                     // release voices if their respective key is not pressed  
                     RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();  
                     for (; iuiKey; ++iuiKey) {  
                         midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];  
                         if (!pKey->KeyPressed && ShouldReleaseVoice(pEngineChannel, *iuiKey)) {  
                             RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();  
                             if (itNewEvent) {  
                                 *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list  
                                 itNewEvent->Type = Event::type_release; // transform event type  
                             }  
                             else dmsg(1,("Event pool emtpy!\n"));  
                         }  
                     }  
                 }  
                 break;  
             }  
             case 65: { // portamento on / off  
                 KillAllVoices(pEngineChannel, itControlChangeEvent);  
                 pEngineChannel->PortamentoMode = itControlChangeEvent->Param.CC.Value >= 64;  
                 break;  
             }  
             case 66: { // sostenuto  
                 if (itControlChangeEvent->Param.CC.Value >= 64 && !pEngineChannel->SostenutoPedal) {  
                     dmsg(4,("SOSTENUTO (CENTER) PEDAL DOWN\n"));  
                     pEngineChannel->SostenutoPedal = true;  
   
                     #if !CONFIG_PROCESS_MUTED_CHANNELS  
                     if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted  
                     #endif  
   
                     SostenutoKeyCount = 0;  
                     // Remeber the pressed keys  
                     RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();  
                     for (; iuiKey; ++iuiKey) {  
                         midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];  
                         if (pKey->KeyPressed && SostenutoKeyCount < 128) SostenutoKeys[SostenutoKeyCount++] = *iuiKey;  
                     }  
                 }  
                 if (itControlChangeEvent->Param.CC.Value < 64 && pEngineChannel->SostenutoPedal) {  
                     dmsg(4,("SOSTENUTO (CENTER) PEDAL UP\n"));  
                     pEngineChannel->SostenutoPedal = false;  
   
                     #if !CONFIG_PROCESS_MUTED_CHANNELS  
                     if (pEngineChannel->GetMute()) return; // skip if sampler channel is muted  
                     #endif  
   
                     // release voices if the damper pedal is up and their respective key is not pressed  
                     for (int i = 0; i < SostenutoKeyCount; i++) {  
                         midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[SostenutoKeys[i]];  
                         if (!pKey->KeyPressed && !pEngineChannel->SustainPedal) {  
                             RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();  
                             if (itNewEvent) {  
                                 *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list  
                                 itNewEvent->Type = Event::type_release; // transform event type  
                             }  
                             else dmsg(1,("Event pool emtpy!\n"));  
                         }  
                     }  
                 }  
                 break;  
             }  
             case 100: { // RPN controller LSB  
                 pEngineChannel->SetMidiRpnControllerLsb(itControlChangeEvent->Param.CC.Value);  
                 break;  
             }  
             case 101: { // RPN controller MSB  
                 pEngineChannel->SetMidiRpnControllerMsb(itControlChangeEvent->Param.CC.Value);  
                 break;  
             }  
   
   
             // Channel Mode Messages  
   
             case 120: { // all sound off  
                 KillAllVoices(pEngineChannel, itControlChangeEvent);  
                 break;  
             }  
             case 121: { // reset all controllers  
                 pEngineChannel->ResetControllers();  
                 break;  
             }  
             case 123: { // all notes off  
                 #if CONFIG_PROCESS_ALL_NOTES_OFF  
                 ReleaseAllVoices(pEngineChannel, itControlChangeEvent);  
                 #endif // CONFIG_PROCESS_ALL_NOTES_OFF  
                 break;  
             }  
             case 126: { // mono mode on  
                 KillAllVoices(pEngineChannel, itControlChangeEvent);  
                 pEngineChannel->SoloMode = true;  
                 break;  
             }  
             case 127: { // poly mode on  
                 KillAllVoices(pEngineChannel, itControlChangeEvent);  
                 pEngineChannel->SoloMode = false;  
                 break;  
             }  
         }  
   
         // handle FX send controllers  
         if (!pEngineChannel->fxSends.empty()) {  
             for (int iFxSend = 0; iFxSend < pEngineChannel->GetFxSendCount(); iFxSend++) {  
                 FxSend* pFxSend = pEngineChannel->GetFxSend(iFxSend);  
                 if (pFxSend->MidiController() == itControlChangeEvent->Param.CC.Controller)  
                     pFxSend->SetLevel(itControlChangeEvent->Param.CC.Value);  
             }  
         }  
     }  
   
     /**  
      *  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,false>::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  
                 dmsg(3,("Roland Sysex\n"));  
                 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,false>::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  
                     dmsg(3,("\tSystem Parameter\n"));  
                 }  
                 else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters  
                     dmsg(3,("\tCommon Parameter\n"));  
                 }  
                 else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1)  
                     dmsg(3,("\tPart Parameter\n"));  
                     switch (addr[2]) {  
                         case 0x40: { // scale tuning  
                             dmsg(3,("\t\tScale Tuning\n"));  
                             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 CONFIG_ASSERT_GS_SYSEX_CHECKSUM  
                             if (GSCheckSum(checksum_reader, 12)) goto free_sysex_data;  
                             #endif // CONFIG_ASSERT_GS_SYSEX_CHECKSUM  
                             for (int i = 0; i < 12; i++) scale_tunes[i] -= 64;  
                             AdjustScale((int8_t*) scale_tunes);  
                             dmsg(3,("\t\t\tNew scale applied.\n"));  
                             break;  
                         }  
                     }  
                 }  
                 else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2)  
                 }  
                 else if (addr[0] == 0x41) { // Drum Setup Parameters  
                 }  
                 break;  
             }  
         }  
302    
303          free_sysex_data: // finally free sysex data          int res = InitNewVoice (
304          pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size);                  pChannel, pDimRgn, itNoteOnEvent, VoiceType, iLayer,
305      }                  iKeyGroup, ReleaseTriggerVoice, VoiceStealing, itNewVoice
306            );
307            if (!res) return itNewVoice;
308    
309      /**          return Pool<Voice>::Iterator(); // no free voice or error
      * 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,false>::NonVolatileReader AddrReader, uint DataSize) {  
         RingBuffer<uint8_t,false>::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  
     }  
   
     /**  
      * Releases all voices on an engine channel. All voices will go into  
      * the release stage and thus it might take some time (e.g. dependant to  
      * their envelope release time) until they actually die.  
      *  
      * @param pEngineChannel - engine channel on which all voices should be released  
      * @param itReleaseEvent - event which caused this releasing of all voices  
      */  
     void Engine::ReleaseAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itReleaseEvent) {  
         RTList<uint>::Iterator iuiKey = pEngineChannel->pActiveKeys->first();  
         while (iuiKey) {  
             midi_key_info_t* pKey = &pEngineChannel->pMIDIKeyInfo[*iuiKey];  
             ++iuiKey;  
             // append a 'release' event to the key's own event list  
             RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend();  
             if (itNewEvent) {  
                 *itNewEvent = *itReleaseEvent; // copy original event (to the key's event list)  
                 itNewEvent->Type = Event::type_release; // transform event type  
             }  
             else dmsg(1,("Event pool emtpy!\n"));  
         }  
     }  
   
     /**  
      * Kills all voices on an engine channel as soon as possible. Voices  
      * won't get into release state, their volume level will be ramped down  
      * as fast as possible.  
      *  
      * @param pEngineChannel - engine channel on which all voices should be killed  
      * @param itKillEvent    - event which caused this killing of all voices  
      */  
     void Engine::KillAllVoices(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itKillEvent) {  
         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  
                 itVoice->Kill(itKillEvent);  
                 --VoiceSpawnsLeft; //FIXME: just a temporary workaround, we should check the cause in StealVoice() instead  
             }  
         }  
     }  
   
     /**  
      * Determines whether the specified voice should be released.  
      *  
      * @param pEngineChannel - The engine channel on which the voice should be checked  
      * @param Key - The key number  
      * @returns true if the specified should be released, false otherwise.  
      */  
     bool Engine::ShouldReleaseVoice(EngineChannel* pEngineChannel, int Key) {  
         if (pEngineChannel->SustainPedal) return false;  
   
         if (pEngineChannel->SostenutoPedal) {  
             for (int i = 0; i < SostenutoKeyCount; i++)  
                 if (Key == SostenutoKeys[i]) return false;  
         }  
   
         return true;  
     }  
   
     uint Engine::VoiceCount() {  
         return ActiveVoiceCount;  
     }  
   
     uint Engine::VoiceCountMax() {  
         return ActiveVoiceCountMax;  
310      }      }
311    
312      bool Engine::DiskStreamSupported() {      bool Engine::DiskStreamSupported() {
313          return true;          return true;
314      }      }
315    
     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 LS_GIG_ENGINE_NAME;  
     }  
   
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          String s = "$Revision: 1.74 $";          String s = "$Revision: 1.109 $";
322          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
323      }      }
324    
     InstrumentManager* Engine::GetInstrumentManager() {  
         return &instruments;  
     }  
   
     // static constant initializers  
     const float* Engine::VolumeCurve(InitVolumeCurve());  
     const float* Engine::PanCurve(InitPanCurve());  
     const float* Engine::CrossfadeCurve(InitCrossfadeCurve());  
   
     float* Engine::InitVolumeCurve() {  
         // line-segment approximation  
         const float segments[] = {  
             0, 0, 2, 0.0046, 16, 0.016, 31, 0.051, 45, 0.115, 54.5, 0.2,  
             64.5, 0.39, 74, 0.74, 92, 1.03, 114, 1.94, 119.2, 2.2, 127, 2.2  
         };  
         return InitCurve(segments);  
     }  
   
     float* Engine::InitPanCurve() {  
         // line-segment approximation  
         const float segments[] = {  
             0, 0, 1, 0,  
             2, 0.05, 31.5, 0.7, 51, 0.851, 74.5, 1.12,  
             127, 1.41, 128, 1.41  
         };  
         return InitCurve(segments, 129);  
     }  
   
     float* Engine::InitCrossfadeCurve() {  
         // line-segment approximation  
         const float segments[] = {  
             0, 0, 1, 0.03, 10, 0.1, 51, 0.58, 127, 1  
         };  
         return InitCurve(segments);  
     }  
   
     float* Engine::InitCurve(const float* segments, int size) {  
         float* y = new float[size];  
         for (int x = 0 ; x < size ; x++) {  
             if (x > segments[2]) segments += 2;  
             y[x] = segments[1] + (x - segments[0]) *  
                 (segments[3] - segments[1]) / (segments[2] - segments[0]);  
         }  
         return y;  
     }  
   
     /**  
      * Changes the instrument for an engine channel.  
      *  
      * @param pEngineChannel - engine channel on which the instrument  
      *                         should be changed  
      * @param pInstrument - new instrument  
      * @returns a list of dimension regions from the old instrument  
      *          that are still in use  
      */  
     ::gig::DimensionRegion** Engine::ChangeInstrument(EngineChannel* pEngineChannel, ::gig::Instrument* pInstrument) {  
         instrument_change_command_t command;  
         command.pEngineChannel = pEngineChannel;  
         command.pInstrument = pInstrument;  
         InstrumentChangeQueue->push(&command);  
   
         // wait for the audio thread to confirm that the instrument  
         // change has been done  
         instrument_change_reply_t reply;  
         while (InstrumentChangeReplyQueue->pop(&reply) == 0) {  
             usleep(10000);  
         }  
         return pDimRegionsInUse;  
     }  
   
325  }} // namespace LinuxSampler::gig  }} // namespace LinuxSampler::gig
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