/[svn]/linuxsampler/trunk/src/engines/gig/Voice.cpp
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revision 242 by schoenebeck, Wed Sep 15 13:59:08 2004 UTC revision 2396 by schoenebeck, Tue Jan 8 12:00:45 2013 UTC
# Line 3  Line 3 
3   *   LinuxSampler - modular, streaming capable sampler                     *   *   LinuxSampler - modular, streaming capable sampler                     *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *   *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
6     *   Copyright (C) 2005 - 2008 Christian Schoenebeck                       *
7     *   Copyright (C) 2009 - 2012 Christian Schoenebeck and Grigor Iliev      *
8   *                                                                         *   *                                                                         *
9   *   This program is free software; you can redistribute it and/or modify  *   *   This program is free software; you can redistribute it and/or modify  *
10   *   it under the terms of the GNU General Public License as published by  *   *   it under the terms of the GNU General Public License as published by  *
# Line 20  Line 22 
22   *   MA  02111-1307  USA                                                   *   *   MA  02111-1307  USA                                                   *
23   ***************************************************************************/   ***************************************************************************/
24    
25  #include "EGADSR.h"  #include "../../common/Features.h"
26  #include "Manipulator.h"  #include "Synthesizer.h"
27    #include "Profiler.h"
28    #include "Engine.h"
29    #include "EngineChannel.h"
30    
31  #include "Voice.h"  #include "Voice.h"
32    
33  namespace LinuxSampler { namespace gig {  namespace LinuxSampler { namespace gig {
34    
35      const float Voice::FILTER_CUTOFF_COEFF(CalculateFilterCutoffCoeff());      Voice::Voice() {
36            pEngine = NULL;
37      const int Voice::FILTER_UPDATE_MASK(CalculateFilterUpdateMask());          pEG1 = &EG1;
38            pEG2 = &EG2;
     float Voice::CalculateFilterCutoffCoeff() {  
         return log(FILTER_CUTOFF_MIN / FILTER_CUTOFF_MAX);  
39      }      }
40    
41      int Voice::CalculateFilterUpdateMask() {      Voice::~Voice() {
         if (FILTER_UPDATE_PERIOD <= 0) return 0;  
         int power_of_two;  
         for (power_of_two = 0; 1<<power_of_two < FILTER_UPDATE_PERIOD; power_of_two++);  
         return (1 << power_of_two) - 1;  
42      }      }
43    
44      Voice::Voice() {      EngineChannel* Voice::GetGigEngineChannel() {
45          pEngine     = NULL;          return static_cast<EngineChannel*>(pEngineChannel);
         pDiskThread = NULL;  
         Active = false;  
         pEG1   = NULL;  
         pEG2   = NULL;  
         pEG3   = NULL;  
         pVCAManipulator  = NULL;  
         pVCFCManipulator = NULL;  
         pVCOManipulator  = NULL;  
         pLFO1  = NULL;  
         pLFO2  = NULL;  
         pLFO3  = NULL;  
         KeyGroup = 0;  
46      }      }
47    
48      Voice::~Voice() {      void Voice::SetEngine(LinuxSampler::Engine* pEngine) {
49          if (pEG1)  delete pEG1;          Engine* engine = static_cast<Engine*>(pEngine);
50          if (pEG2)  delete pEG2;          this->pEngine     = engine;
51          if (pEG3)  delete pEG3;          this->pDiskThread = engine->pDiskThread;
         if (pLFO1) delete pLFO1;  
         if (pLFO2) delete pLFO2;  
         if (pLFO3) delete pLFO3;  
         if (pVCAManipulator)  delete pVCAManipulator;  
         if (pVCFCManipulator) delete pVCFCManipulator;  
         if (pVCOManipulator)  delete pVCOManipulator;  
     }  
   
     void Voice::SetEngine(Engine* pEngine) {  
         this->pEngine = pEngine;  
   
         // delete old objects  
         if (pEG1) delete pEG1;  
         if (pEG2) delete pEG2;  
         if (pEG3) delete pEG3;  
         if (pVCAManipulator)  delete pVCAManipulator;  
         if (pVCFCManipulator) delete pVCFCManipulator;  
         if (pVCOManipulator)  delete pVCOManipulator;  
         if (pLFO1) delete pLFO1;  
         if (pLFO2) delete pLFO2;  
         if (pLFO3) delete pLFO3;  
   
         // create new ones  
         pEG1   = new EGADSR(pEngine, Event::destination_vca);  
         pEG2   = new EGADSR(pEngine, Event::destination_vcfc);  
         pEG3   = new EGDecay(pEngine, Event::destination_vco);  
         pVCAManipulator  = new VCAManipulator(pEngine);  
         pVCFCManipulator = new VCFCManipulator(pEngine);  
         pVCOManipulator  = new VCOManipulator(pEngine);  
         pLFO1  = new LFO<gig::VCAManipulator>(0.0f, 1.0f, LFO<VCAManipulator>::propagation_top_down, pVCAManipulator, pEngine->pEventPool);  
         pLFO2  = new LFO<gig::VCFCManipulator>(0.0f, 1.0f, LFO<VCFCManipulator>::propagation_top_down, pVCFCManipulator, pEngine->pEventPool);  
         pLFO3  = new LFO<gig::VCOManipulator>(-1200.0f, 1200.0f, LFO<VCOManipulator>::propagation_middle_balanced, pVCOManipulator, pEngine->pEventPool); // +-1 octave (+-1200 cents) max.  
   
         this->pDiskThread = pEngine->pDiskThread;  
52          dmsg(6,("Voice::SetEngine()\n"));          dmsg(6,("Voice::SetEngine()\n"));
53      }      }
54    
55      /**      Voice::SampleInfo Voice::GetSampleInfo() {
56       *  Initializes and triggers the voice, a disk stream will be launched if          SampleInfo si;
57       *  needed.          si.SampleRate       = pSample->SamplesPerSecond;
58       *          si.ChannelCount     = pSample->Channels;
59       *  @param pNoteOnEvent        - event that caused triggering of this voice          si.FrameSize        = pSample->FrameSize;
60       *  @param PitchBend           - MIDI detune factor (-8192 ... +8191)          si.BitDepth         = pSample->BitDepth;
61       *  @param pInstrument         - points to the loaded instrument which provides sample wave(s) and articulation data          si.TotalFrameCount  = pSample->SamplesTotal;
      *  @param iLayer              - layer number this voice refers to (only if this is a layered sound of course)  
      *  @param ReleaseTriggerVoice - if this new voice is a release trigger voice (optional, default = false)  
      *  @returns 0 on success, a value < 0 if something failed  
      */  
     int Voice::Trigger(Event* pNoteOnEvent, int PitchBend, ::gig::Instrument* pInstrument, int iLayer, bool ReleaseTriggerVoice) {  
         if (!pInstrument) {  
            dmsg(1,("voice::trigger: !pInstrument\n"));  
            exit(EXIT_FAILURE);  
         }  
   
         Type            = type_normal;  
         Active          = true;  
         MIDIKey         = pNoteOnEvent->Key;  
         pRegion         = pInstrument->GetRegion(MIDIKey);  
         PlaybackState   = playback_state_ram; // we always start playback from RAM cache and switch then to disk if needed  
         Delay           = pNoteOnEvent->FragmentPos();  
         pTriggerEvent   = pNoteOnEvent;  
         pKillEvent      = NULL;  
   
         if (!pRegion) {  
             std::cerr << "gig::Voice: No Region defined for MIDI key " << MIDIKey << std::endl << std::flush;  
             KillImmediately();  
             return -1;  
         }  
   
         KeyGroup = pRegion->KeyGroup;  
62    
63          // get current dimension values to select the right dimension region          si.HasLoops       = pRegion->SampleLoops;
64          //FIXME: controller values for selecting the dimension region here are currently not sample accurate          si.LoopStart      = (si.HasLoops) ? pRegion->pSampleLoops[0].LoopStart  : 0;
65          uint DimValues[5] = {0,0,0,0,0};          si.LoopLength     = (si.HasLoops) ? pRegion->pSampleLoops[0].LoopLength : 0;
66          for (int i = pRegion->Dimensions - 1; i >= 0; i--) {          si.LoopPlayCount  = pSample->LoopPlayCount;
67              switch (pRegion->pDimensionDefinitions[i].dimension) {          si.Unpitched      = !pRegion->PitchTrack;
                 case ::gig::dimension_samplechannel:  
                     DimValues[i] = 0; //TODO: we currently ignore this dimension  
                     break;  
                 case ::gig::dimension_layer:  
                     DimValues[i] = iLayer;  
                     // if this is the 1st layer then spawn further voices for all the other layers  
                     if (iLayer == 0)  
                         for (int iNewLayer = 1; iNewLayer < pRegion->pDimensionDefinitions[i].zones; iNewLayer++)  
                             pEngine->LaunchVoice(pNoteOnEvent, iNewLayer, ReleaseTriggerVoice);  
                     break;  
                 case ::gig::dimension_velocity:  
                     DimValues[i] = pNoteOnEvent->Velocity;  
                     break;  
                 case ::gig::dimension_channelaftertouch:  
                     DimValues[i] = 0; //TODO: we currently ignore this dimension  
                     break;  
                 case ::gig::dimension_releasetrigger:  
                     Type = (ReleaseTriggerVoice) ? type_release_trigger : (!iLayer) ? type_release_trigger_required : type_normal;  
                     DimValues[i] = (uint) ReleaseTriggerVoice;  
                     break;  
                 case ::gig::dimension_keyboard:  
                     DimValues[i] = (uint) pNoteOnEvent->Key;  
                     break;  
                 case ::gig::dimension_modwheel:  
                     DimValues[i] = pEngine->ControllerTable[1];  
                     break;  
                 case ::gig::dimension_breath:  
                     DimValues[i] = pEngine->ControllerTable[2];  
                     break;  
                 case ::gig::dimension_foot:  
                     DimValues[i] = pEngine->ControllerTable[4];  
                     break;  
                 case ::gig::dimension_portamentotime:  
                     DimValues[i] = pEngine->ControllerTable[5];  
                     break;  
                 case ::gig::dimension_effect1:  
                     DimValues[i] = pEngine->ControllerTable[12];  
                     break;  
                 case ::gig::dimension_effect2:  
                     DimValues[i] = pEngine->ControllerTable[13];  
                     break;  
                 case ::gig::dimension_genpurpose1:  
                     DimValues[i] = pEngine->ControllerTable[16];  
                     break;  
                 case ::gig::dimension_genpurpose2:  
                     DimValues[i] = pEngine->ControllerTable[17];  
                     break;  
                 case ::gig::dimension_genpurpose3:  
                     DimValues[i] = pEngine->ControllerTable[18];  
                     break;  
                 case ::gig::dimension_genpurpose4:  
                     DimValues[i] = pEngine->ControllerTable[19];  
                     break;  
                 case ::gig::dimension_sustainpedal:  
                     DimValues[i] = pEngine->ControllerTable[64];  
                     break;  
                 case ::gig::dimension_portamento:  
                     DimValues[i] = pEngine->ControllerTable[65];  
                     break;  
                 case ::gig::dimension_sostenutopedal:  
                     DimValues[i] = pEngine->ControllerTable[66];  
                     break;  
                 case ::gig::dimension_softpedal:  
                     DimValues[i] = pEngine->ControllerTable[67];  
                     break;  
                 case ::gig::dimension_genpurpose5:  
                     DimValues[i] = pEngine->ControllerTable[80];  
                     break;  
                 case ::gig::dimension_genpurpose6:  
                     DimValues[i] = pEngine->ControllerTable[81];  
                     break;  
                 case ::gig::dimension_genpurpose7:  
                     DimValues[i] = pEngine->ControllerTable[82];  
                     break;  
                 case ::gig::dimension_genpurpose8:  
                     DimValues[i] = pEngine->ControllerTable[83];  
                     break;  
                 case ::gig::dimension_effect1depth:  
                     DimValues[i] = pEngine->ControllerTable[91];  
                     break;  
                 case ::gig::dimension_effect2depth:  
                     DimValues[i] = pEngine->ControllerTable[92];  
                     break;  
                 case ::gig::dimension_effect3depth:  
                     DimValues[i] = pEngine->ControllerTable[93];  
                     break;  
                 case ::gig::dimension_effect4depth:  
                     DimValues[i] = pEngine->ControllerTable[94];  
                     break;  
                 case ::gig::dimension_effect5depth:  
                     DimValues[i] = pEngine->ControllerTable[95];  
                     break;  
                 case ::gig::dimension_none:  
                     std::cerr << "gig::Voice::Trigger() Error: dimension=none\n" << std::flush;  
                     break;  
                 default:  
                     std::cerr << "gig::Voice::Trigger() Error: Unknown dimension\n" << std::flush;  
             }  
         }  
         pDimRgn = pRegion->GetDimensionRegionByValue(DimValues[4],DimValues[3],DimValues[2],DimValues[1],DimValues[0]);  
   
         // get starting crossfade volume level  
         switch (pDimRgn->AttenuationController.type) {  
             case ::gig::attenuation_ctrl_t::type_channelaftertouch:  
                 CrossfadeVolume = 1.0f; //TODO: aftertouch not supported yet  
                 break;  
             case ::gig::attenuation_ctrl_t::type_velocity:  
                 CrossfadeVolume = CrossfadeAttenuation(pNoteOnEvent->Velocity);  
                 break;  
             case ::gig::attenuation_ctrl_t::type_controlchange: //FIXME: currently not sample accurate  
                 CrossfadeVolume = CrossfadeAttenuation(pEngine->ControllerTable[pDimRgn->AttenuationController.controller_number]);  
                 break;  
             case ::gig::attenuation_ctrl_t::type_none: // no crossfade defined  
             default:  
                 CrossfadeVolume = 1.0f;  
         }  
68    
69          pSample = pDimRgn->pSample; // sample won't change until the voice is finished          return si;
70        }
71    
72          Pos = pDimRgn->SampleStartOffset; // offset where we should start playback of sample (0 - 2000 sample points)      Voice::RegionInfo Voice::GetRegionInfo() {
73            RegionInfo ri;
74            ri.UnityNote = pRegion->UnityNote;
75            ri.FineTune  = pRegion->FineTune;
76            ri.Pan       = pRegion->Pan;
77            ri.SampleStartOffset = pRegion->SampleStartOffset;
78    
79          // Check if the sample needs disk streaming or is too short for that          ri.EG2PreAttack        = pRegion->EG2PreAttack;
80          long cachedsamples = pSample->GetCache().Size / pSample->FrameSize;          ri.EG2Attack           = pRegion->EG2Attack;
81          DiskVoice          = cachedsamples < pSample->SamplesTotal;          ri.EG2Decay1           = pRegion->EG2Decay1;
82            ri.EG2Decay2           = pRegion->EG2Decay2;
83            ri.EG2Sustain          = pRegion->EG2Sustain;
84            ri.EG2InfiniteSustain  = pRegion->EG2InfiniteSustain;
85            ri.EG2Release          = pRegion->EG2Release;
86    
87          if (DiskVoice) { // voice to be streamed from disk          ri.EG3Attack     = pRegion->EG3Attack;
88              MaxRAMPos = cachedsamples - (pEngine->MaxSamplesPerCycle << MAX_PITCH) / pSample->Channels; //TODO: this calculation is too pessimistic and may better be moved to Render() method, so it calculates MaxRAMPos dependent to the current demand of sample points to be rendered (e.g. in case of JACK)          ri.EG3Depth      = pRegion->EG3Depth;
89            ri.VCFEnabled    = pRegion->VCFEnabled;
90            ri.VCFType       = Filter::vcf_type_t(pRegion->VCFType);
91            ri.VCFResonance  = pRegion->VCFResonance;
92    
93              // check if there's a loop defined which completely fits into the cached (RAM) part of the sample          ri.ReleaseTriggerDecay = 0.01053 * (256 >> pRegion->ReleaseTriggerDecay);
             if (pSample->Loops && pSample->LoopEnd <= MaxRAMPos) {  
                 RAMLoop        = true;  
                 LoopCyclesLeft = pSample->LoopPlayCount;  
             }  
             else RAMLoop = false;  
94    
95              if (pDiskThread->OrderNewStream(&DiskStreamRef, pSample, MaxRAMPos, !RAMLoop) < 0) {          return ri;
96                  dmsg(1,("Disk stream order failed!\n"));      }
                 KillImmediately();  
                 return -1;  
             }  
             dmsg(4,("Disk voice launched (cached samples: %d, total Samples: %d, MaxRAMPos: %d, RAMLooping: %s)\n", cachedsamples, pSample->SamplesTotal, MaxRAMPos, (RAMLoop) ? "yes" : "no"));  
         }  
         else { // RAM only voice  
             MaxRAMPos = cachedsamples;  
             if (pSample->Loops) {  
                 RAMLoop        = true;  
                 LoopCyclesLeft = pSample->LoopPlayCount;  
             }  
             else RAMLoop = false;  
             dmsg(4,("RAM only voice launched (Looping: %s)\n", (RAMLoop) ? "yes" : "no"));  
         }  
97    
98        Voice::InstrumentInfo Voice::GetInstrumentInfo() {
99            InstrumentInfo ii;
100            ii.FineTune = GetGigEngineChannel()->pInstrument->FineTune;
101            ii.PitchbendRange = GetGigEngineChannel()->pInstrument->PitchbendRange;
102    
103          // calculate initial pitch value          return ii;
104          {      }
             double pitchbasecents = pDimRgn->FineTune * 10;  
             if (pDimRgn->PitchTrack) pitchbasecents += (MIDIKey - (int) pDimRgn->UnityNote) * 100;  
             this->PitchBase = RTMath::CentsToFreqRatio(pitchbasecents) * (double(pSample->SamplesPerSecond) / double(pEngine->pAudioOutputDevice->SampleRate()));  
             this->PitchBend = RTMath::CentsToFreqRatio(((double) PitchBend / 8192.0) * 200.0); // pitchbend wheel +-2 semitones = 200 cents  
         }  
105    
106        double Voice::GetSampleAttenuation() {
107            return pRegion->SampleAttenuation;
108        }
109    
110          Volume = pDimRgn->GetVelocityAttenuation(pNoteOnEvent->Velocity) / 32768.0f; // we downscale by 32768 to convert from int16 value range to DSP value range (which is -1.0..1.0)      double Voice::GetVelocityAttenuation(uint8_t MIDIKeyVelocity) {
111            return pRegion->GetVelocityAttenuation(MIDIKeyVelocity);
112        }
113    
114        double Voice::GetVelocityRelease(uint8_t MIDIKeyVelocity) {
115            return pRegion->GetVelocityRelease(MIDIKeyVelocity);
116        }
117    
118          // setup EG 1 (VCA EG)      void Voice::ProcessCCEvent(RTList<Event>::Iterator& itEvent) {
119          {          if (itEvent->Type == Event::type_control_change && itEvent->Param.CC.Controller) { // if (valid) MIDI control change event
120              // get current value of EG1 controller              if (pRegion->AttenuationController.type == ::gig::attenuation_ctrl_t::type_controlchange &&
121              double eg1controllervalue;                  itEvent->Param.CC.Controller == pRegion->AttenuationController.controller_number) {
122              switch (pDimRgn->EG1Controller.type) {                  CrossfadeSmoother.update(AbstractEngine::CrossfadeCurve[CrossfadeAttenuation(itEvent->Param.CC.Value)]);
                 case ::gig::eg1_ctrl_t::type_none: // no controller defined  
                     eg1controllervalue = 0;  
                     break;  
                 case ::gig::eg1_ctrl_t::type_channelaftertouch:  
                     eg1controllervalue = 0; // TODO: aftertouch not yet supported  
                     break;  
                 case ::gig::eg1_ctrl_t::type_velocity:  
                     eg1controllervalue = pNoteOnEvent->Velocity;  
                     break;  
                 case ::gig::eg1_ctrl_t::type_controlchange: // MIDI control change controller  
                     eg1controllervalue = pEngine->ControllerTable[pDimRgn->EG1Controller.controller_number];  
                     break;  
123              }              }
             if (pDimRgn->EG1ControllerInvert) eg1controllervalue = 127 - eg1controllervalue;  
   
             // calculate influence of EG1 controller on EG1's parameters (TODO: needs to be fine tuned)  
             double eg1attack  = (pDimRgn->EG1ControllerAttackInfluence)  ? 0.0001 * (double) (1 << pDimRgn->EG1ControllerAttackInfluence)  * eg1controllervalue : 0.0;  
             double eg1decay   = (pDimRgn->EG1ControllerDecayInfluence)   ? 0.0001 * (double) (1 << pDimRgn->EG1ControllerDecayInfluence)   * eg1controllervalue : 0.0;  
             double eg1release = (pDimRgn->EG1ControllerReleaseInfluence) ? 0.0001 * (double) (1 << pDimRgn->EG1ControllerReleaseInfluence) * eg1controllervalue : 0.0;  
   
             pEG1->Trigger(pDimRgn->EG1PreAttack,  
                           pDimRgn->EG1Attack + eg1attack,  
                           pDimRgn->EG1Hold,  
                           pSample->LoopStart,  
                           pDimRgn->EG1Decay1 + eg1decay,  
                           pDimRgn->EG1Decay2 + eg1decay,  
                           pDimRgn->EG1InfiniteSustain,  
                           pDimRgn->EG1Sustain,  
                           pDimRgn->EG1Release + eg1release,  
                           Delay);  
124          }          }
125        }
126    
127        void Voice::ProcessCutoffEvent(RTList<Event>::Iterator& itEvent) {
128            int ccvalue = itEvent->Param.CC.Value;
129            if (VCFCutoffCtrl.value == ccvalue) return;
130            VCFCutoffCtrl.value = ccvalue;
131            if (pRegion->VCFCutoffControllerInvert)  ccvalue = 127 - ccvalue;
132            if (ccvalue < pRegion->VCFVelocityScale) ccvalue = pRegion->VCFVelocityScale;
133            float cutoff = CutoffBase * float(ccvalue);
134            if (cutoff > 127.0f) cutoff = 127.0f;
135    
136      #if ENABLE_FILTER          VCFCutoffCtrl.fvalue = cutoff; // needed for initialization of fFinalCutoff next time
137          // setup EG 2 (VCF Cutoff EG)          fFinalCutoff = cutoff;
138          {      }
             // get current value of EG2 controller  
             double eg2controllervalue;  
             switch (pDimRgn->EG2Controller.type) {  
                 case ::gig::eg2_ctrl_t::type_none: // no controller defined  
                     eg2controllervalue = 0;  
                     break;  
                 case ::gig::eg2_ctrl_t::type_channelaftertouch:  
                     eg2controllervalue = 0; // TODO: aftertouch not yet supported  
                     break;  
                 case ::gig::eg2_ctrl_t::type_velocity:  
                     eg2controllervalue = pNoteOnEvent->Velocity;  
                     break;  
                 case ::gig::eg2_ctrl_t::type_controlchange: // MIDI control change controller  
                     eg2controllervalue = pEngine->ControllerTable[pDimRgn->EG2Controller.controller_number];  
                     break;  
             }  
             if (pDimRgn->EG2ControllerInvert) eg2controllervalue = 127 - eg2controllervalue;  
139    
140              // calculate influence of EG2 controller on EG2's parameters (TODO: needs to be fine tuned)      double Voice::CalculateCrossfadeVolume(uint8_t MIDIKeyVelocity) {
141              double eg2attack  = (pDimRgn->EG2ControllerAttackInfluence)  ? 0.0001 * (double) (1 << pDimRgn->EG2ControllerAttackInfluence)  * eg2controllervalue : 0.0;          float crossfadeVolume;
142              double eg2decay   = (pDimRgn->EG2ControllerDecayInfluence)   ? 0.0001 * (double) (1 << pDimRgn->EG2ControllerDecayInfluence)   * eg2controllervalue : 0.0;          switch (pRegion->AttenuationController.type) {
143              double eg2release = (pDimRgn->EG2ControllerReleaseInfluence) ? 0.0001 * (double) (1 << pDimRgn->EG2ControllerReleaseInfluence) * eg2controllervalue : 0.0;              case ::gig::attenuation_ctrl_t::type_channelaftertouch:
144                    crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(GetGigEngineChannel()->ControllerTable[128])];
145              pEG2->Trigger(pDimRgn->EG2PreAttack,                  break;
146                            pDimRgn->EG2Attack + eg2attack,              case ::gig::attenuation_ctrl_t::type_velocity:
147                            false,                  crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(MIDIKeyVelocity)];
148                            pSample->LoopStart,                  break;
149                            pDimRgn->EG2Decay1 + eg2decay,              case ::gig::attenuation_ctrl_t::type_controlchange: //FIXME: currently not sample accurate
150                            pDimRgn->EG2Decay2 + eg2decay,                  crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(GetGigEngineChannel()->ControllerTable[pRegion->AttenuationController.controller_number])];
151                            pDimRgn->EG2InfiniteSustain,                  break;
152                            pDimRgn->EG2Sustain,              case ::gig::attenuation_ctrl_t::type_none: // no crossfade defined
153                            pDimRgn->EG2Release + eg2release,              default:
154                            Delay);                  crossfadeVolume = 1.0f;
155          }          }
     #endif // ENABLE_FILTER  
156    
157            return crossfadeVolume;
158        }
159    
160          // setup EG 3 (VCO EG)      double Voice::GetEG1ControllerValue(uint8_t MIDIKeyVelocity) {
161          {          double eg1controllervalue = 0;
162            double eg3depth = RTMath::CentsToFreqRatio(pDimRgn->EG3Depth);          switch (pRegion->EG1Controller.type) {
163            pEG3->Trigger(eg3depth, pDimRgn->EG3Attack, Delay);              case ::gig::eg1_ctrl_t::type_none: // no controller defined
164                    eg1controllervalue = 0;
165                    break;
166                case ::gig::eg1_ctrl_t::type_channelaftertouch:
167                    eg1controllervalue = GetGigEngineChannel()->ControllerTable[128];
168                    break;
169                case ::gig::eg1_ctrl_t::type_velocity:
170                    eg1controllervalue = MIDIKeyVelocity;
171                    break;
172                case ::gig::eg1_ctrl_t::type_controlchange: // MIDI control change controller
173                    eg1controllervalue = GetGigEngineChannel()->ControllerTable[pRegion->EG1Controller.controller_number];
174                    break;
175          }          }
176            if (pRegion->EG1ControllerInvert) eg1controllervalue = 127 - eg1controllervalue;
177    
178            return eg1controllervalue;
179        }
180    
181          // setup LFO 1 (VCA LFO)      Voice::EGInfo Voice::CalculateEG1ControllerInfluence(double eg1ControllerValue) {
182          {          EGInfo eg;
183              uint16_t lfo1_internal_depth;          // (eg1attack is different from the others)
184              switch (pDimRgn->LFO1Controller) {          eg.Attack  = (pRegion->EG1ControllerAttackInfluence)  ?
185                  case ::gig::lfo1_ctrl_internal:              1 + 0.031 * (double) (pRegion->EG1ControllerAttackInfluence == 1 ?
186                      lfo1_internal_depth  = pDimRgn->LFO1InternalDepth;                                    1 : 1 << pRegion->EG1ControllerAttackInfluence) * eg1ControllerValue : 1.0;
187                      pLFO1->ExtController = 0; // no external controller          eg.Decay   = (pRegion->EG1ControllerDecayInfluence)   ? 1 + 0.00775 * (double) (1 << pRegion->EG1ControllerDecayInfluence)   * eg1ControllerValue : 1.0;
188                      break;          eg.Release = (pRegion->EG1ControllerReleaseInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG1ControllerReleaseInfluence) * eg1ControllerValue : 1.0;
                 case ::gig::lfo1_ctrl_modwheel:  
                     lfo1_internal_depth  = 0;  
                     pLFO1->ExtController = 1; // MIDI controller 1  
                     break;  
                 case ::gig::lfo1_ctrl_breath:  
                     lfo1_internal_depth  = 0;  
                     pLFO1->ExtController = 2; // MIDI controller 2  
                     break;  
                 case ::gig::lfo1_ctrl_internal_modwheel:  
                     lfo1_internal_depth  = pDimRgn->LFO1InternalDepth;  
                     pLFO1->ExtController = 1; // MIDI controller 1  
                     break;  
                 case ::gig::lfo1_ctrl_internal_breath:  
                     lfo1_internal_depth  = pDimRgn->LFO1InternalDepth;  
                     pLFO1->ExtController = 2; // MIDI controller 2  
                     break;  
                 default:  
                     lfo1_internal_depth  = 0;  
                     pLFO1->ExtController = 0; // no external controller  
             }  
             pLFO1->Trigger(pDimRgn->LFO1Frequency,  
                           lfo1_internal_depth,  
                           pDimRgn->LFO1ControlDepth,  
                           pEngine->ControllerTable[pLFO1->ExtController],  
                           pDimRgn->LFO1FlipPhase,  
                           pEngine->SampleRate,  
                           Delay);  
         }  
189    
190      #if ENABLE_FILTER          return eg;
191          // setup LFO 2 (VCF Cutoff LFO)      }
         {  
             uint16_t lfo2_internal_depth;  
             switch (pDimRgn->LFO2Controller) {  
                 case ::gig::lfo2_ctrl_internal:  
                     lfo2_internal_depth  = pDimRgn->LFO2InternalDepth;  
                     pLFO2->ExtController = 0; // no external controller  
                     break;  
                 case ::gig::lfo2_ctrl_modwheel:  
                     lfo2_internal_depth  = 0;  
                     pLFO2->ExtController = 1; // MIDI controller 1  
                     break;  
                 case ::gig::lfo2_ctrl_foot:  
                     lfo2_internal_depth  = 0;  
                     pLFO2->ExtController = 4; // MIDI controller 4  
                     break;  
                 case ::gig::lfo2_ctrl_internal_modwheel:  
                     lfo2_internal_depth  = pDimRgn->LFO2InternalDepth;  
                     pLFO2->ExtController = 1; // MIDI controller 1  
                     break;  
                 case ::gig::lfo2_ctrl_internal_foot:  
                     lfo2_internal_depth  = pDimRgn->LFO2InternalDepth;  
                     pLFO2->ExtController = 4; // MIDI controller 4  
                     break;  
                 default:  
                     lfo2_internal_depth  = 0;  
                     pLFO2->ExtController = 0; // no external controller  
             }  
             pLFO2->Trigger(pDimRgn->LFO2Frequency,  
                           lfo2_internal_depth,  
                           pDimRgn->LFO2ControlDepth,  
                           pEngine->ControllerTable[pLFO2->ExtController],  
                           pDimRgn->LFO2FlipPhase,  
                           pEngine->SampleRate,  
                           Delay);  
         }  
     #endif // ENABLE_FILTER  
192    
193          // setup LFO 3 (VCO LFO)      double Voice::GetEG2ControllerValue(uint8_t MIDIKeyVelocity) {
194          {          double eg2controllervalue = 0;
195              uint16_t lfo3_internal_depth;          switch (pRegion->EG2Controller.type) {
196              switch (pDimRgn->LFO3Controller) {              case ::gig::eg2_ctrl_t::type_none: // no controller defined
197                  case ::gig::lfo3_ctrl_internal:                  eg2controllervalue = 0;
198                      lfo3_internal_depth  = pDimRgn->LFO3InternalDepth;                  break;
199                      pLFO3->ExtController = 0; // no external controller              case ::gig::eg2_ctrl_t::type_channelaftertouch:
200                      break;                  eg2controllervalue = GetGigEngineChannel()->ControllerTable[128];
201                  case ::gig::lfo3_ctrl_modwheel:                  break;
202                      lfo3_internal_depth  = 0;              case ::gig::eg2_ctrl_t::type_velocity:
203                      pLFO3->ExtController = 1; // MIDI controller 1                  eg2controllervalue = MIDIKeyVelocity;
204                      break;                  break;
205                  case ::gig::lfo3_ctrl_aftertouch:              case ::gig::eg2_ctrl_t::type_controlchange: // MIDI control change controller
206                      lfo3_internal_depth  = 0;                  eg2controllervalue = GetGigEngineChannel()->ControllerTable[pRegion->EG2Controller.controller_number];
207                      pLFO3->ExtController = 0; // TODO: aftertouch not implemented yet                  break;
                     break;  
                 case ::gig::lfo3_ctrl_internal_modwheel:  
                     lfo3_internal_depth  = pDimRgn->LFO3InternalDepth;  
                     pLFO3->ExtController = 1; // MIDI controller 1  
                     break;  
                 case ::gig::lfo3_ctrl_internal_aftertouch:  
                     lfo3_internal_depth  = pDimRgn->LFO3InternalDepth;  
                     pLFO1->ExtController = 0; // TODO: aftertouch not implemented yet  
                     break;  
                 default:  
                     lfo3_internal_depth  = 0;  
                     pLFO3->ExtController = 0; // no external controller  
             }  
             pLFO3->Trigger(pDimRgn->LFO3Frequency,  
                           lfo3_internal_depth,  
                           pDimRgn->LFO3ControlDepth,  
                           pEngine->ControllerTable[pLFO3->ExtController],  
                           false,  
                           pEngine->SampleRate,  
                           Delay);  
208          }          }
209            if (pRegion->EG2ControllerInvert) eg2controllervalue = 127 - eg2controllervalue;
210    
211      #if ENABLE_FILTER          return eg2controllervalue;
212          #if FORCE_FILTER_USAGE      }
         FilterLeft.Enabled = FilterRight.Enabled = true;  
         #else // use filter only if instrument file told so  
         FilterLeft.Enabled = FilterRight.Enabled = pDimRgn->VCFEnabled;  
         #endif // FORCE_FILTER_USAGE  
         if (pDimRgn->VCFEnabled) {  
             #ifdef OVERRIDE_FILTER_CUTOFF_CTRL  
             VCFCutoffCtrl.controller = OVERRIDE_FILTER_CUTOFF_CTRL;  
             #else // use the one defined in the instrument file  
             switch (pDimRgn->VCFCutoffController) {  
                 case ::gig::vcf_cutoff_ctrl_modwheel:  
                     VCFCutoffCtrl.controller = 1;  
                     break;  
                 case ::gig::vcf_cutoff_ctrl_effect1:  
                     VCFCutoffCtrl.controller = 12;  
                     break;  
                 case ::gig::vcf_cutoff_ctrl_effect2:  
                     VCFCutoffCtrl.controller = 13;  
                     break;  
                 case ::gig::vcf_cutoff_ctrl_breath:  
                     VCFCutoffCtrl.controller = 2;  
                     break;  
                 case ::gig::vcf_cutoff_ctrl_foot:  
                     VCFCutoffCtrl.controller = 4;  
                     break;  
                 case ::gig::vcf_cutoff_ctrl_sustainpedal:  
                     VCFCutoffCtrl.controller = 64;  
                     break;  
                 case ::gig::vcf_cutoff_ctrl_softpedal:  
                     VCFCutoffCtrl.controller = 67;  
                     break;  
                 case ::gig::vcf_cutoff_ctrl_genpurpose7:  
                     VCFCutoffCtrl.controller = 82;  
                     break;  
                 case ::gig::vcf_cutoff_ctrl_genpurpose8:  
                     VCFCutoffCtrl.controller = 83;  
                     break;  
                 case ::gig::vcf_cutoff_ctrl_aftertouch: //TODO: not implemented yet  
                 case ::gig::vcf_cutoff_ctrl_none:  
                 default:  
                     VCFCutoffCtrl.controller = 0;  
                     break;  
             }  
             #endif // OVERRIDE_FILTER_CUTOFF_CTRL  
   
             #ifdef OVERRIDE_FILTER_RES_CTRL  
             VCFResonanceCtrl.controller = OVERRIDE_FILTER_RES_CTRL;  
             #else // use the one defined in the instrument file  
             switch (pDimRgn->VCFResonanceController) {  
                 case ::gig::vcf_res_ctrl_genpurpose3:  
                     VCFResonanceCtrl.controller = 18;  
                     break;  
                 case ::gig::vcf_res_ctrl_genpurpose4:  
                     VCFResonanceCtrl.controller = 19;  
                     break;  
                 case ::gig::vcf_res_ctrl_genpurpose5:  
                     VCFResonanceCtrl.controller = 80;  
                     break;  
                 case ::gig::vcf_res_ctrl_genpurpose6:  
                     VCFResonanceCtrl.controller = 81;  
                     break;  
                 case ::gig::vcf_res_ctrl_none:  
                 default:  
                     VCFResonanceCtrl.controller = 0;  
             }  
             #endif // OVERRIDE_FILTER_RES_CTRL  
   
             #ifndef OVERRIDE_FILTER_TYPE  
             FilterLeft.SetType(pDimRgn->VCFType);  
             FilterRight.SetType(pDimRgn->VCFType);  
             #else // override filter type  
             FilterLeft.SetType(OVERRIDE_FILTER_TYPE);  
             FilterRight.SetType(OVERRIDE_FILTER_TYPE);  
             #endif // OVERRIDE_FILTER_TYPE  
   
             VCFCutoffCtrl.value    = pEngine->ControllerTable[VCFCutoffCtrl.controller];  
             VCFResonanceCtrl.value = pEngine->ControllerTable[VCFResonanceCtrl.controller];  
   
             // calculate cutoff frequency  
             float cutoff = (!VCFCutoffCtrl.controller)  
                 ? exp((float) (127 - pNoteOnEvent->Velocity) * (float) pDimRgn->VCFVelocityScale * 6.2E-5f * FILTER_CUTOFF_COEFF) * FILTER_CUTOFF_MAX  
                 : exp((float) VCFCutoffCtrl.value * 0.00787402f * FILTER_CUTOFF_COEFF) * FILTER_CUTOFF_MAX;  
   
             // calculate resonance  
             float resonance = (float) VCFResonanceCtrl.value * 0.00787f;   // 0.0..1.0  
             if (pDimRgn->VCFKeyboardTracking) {  
                 resonance += (float) (pNoteOnEvent->Key - pDimRgn->VCFKeyboardTrackingBreakpoint) * 0.00787f;  
             }  
             Constrain(resonance, 0.0, 1.0); // correct resonance if outside allowed value range (0.0..1.0)  
   
             VCFCutoffCtrl.fvalue    = cutoff - FILTER_CUTOFF_MIN;  
             VCFResonanceCtrl.fvalue = resonance;  
   
             FilterLeft.SetParameters(cutoff,  resonance, pEngine->SampleRate);  
             FilterRight.SetParameters(cutoff, resonance, pEngine->SampleRate);  
213    
214              FilterUpdateCounter = -1;      Voice::EGInfo Voice::CalculateEG2ControllerInfluence(double eg2ControllerValue) {
215          }          EGInfo eg;
216          else {          eg.Attack  = (pRegion->EG2ControllerAttackInfluence)  ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerAttackInfluence)  * eg2ControllerValue : 1.0;
217              VCFCutoffCtrl.controller    = 0;          eg.Decay   = (pRegion->EG2ControllerDecayInfluence)   ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerDecayInfluence)   * eg2ControllerValue : 1.0;
218              VCFResonanceCtrl.controller = 0;          eg.Release = (pRegion->EG2ControllerReleaseInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerReleaseInfluence) * eg2ControllerValue : 1.0;
         }  
     #endif // ENABLE_FILTER  
219    
220          return 0; // success          return eg;
221      }      }
222    
223      /**      void Voice::InitLFO1() {
224       *  Renders the audio data for this voice for the current audio fragment.          uint16_t lfo1_internal_depth;
225       *  The sample input data can either come from RAM (cached sample or sample          switch (pRegion->LFO1Controller) {
226       *  part) or directly from disk. The output signal will be rendered by              case ::gig::lfo1_ctrl_internal:
227       *  resampling / interpolation. If this voice is a disk streaming voice and                  lfo1_internal_depth  = pRegion->LFO1InternalDepth;
228       *  the voice completely played back the cached RAM part of the sample, it                  pLFO1->ExtController = 0; // no external controller
229       *  will automatically switch to disk playback for the next RenderAudio()                  bLFO1Enabled         = (lfo1_internal_depth > 0);
      *  call.  
      *  
      *  @param Samples - number of samples to be rendered in this audio fragment cycle  
      */  
     void Voice::Render(uint Samples) {  
   
         // Reset the synthesis parameter matrix  
         pEngine->ResetSynthesisParameters(Event::destination_vca, this->Volume * this->CrossfadeVolume * pEngine->GlobalVolume);  
         pEngine->ResetSynthesisParameters(Event::destination_vco, this->PitchBase);  
     #if ENABLE_FILTER  
         pEngine->ResetSynthesisParameters(Event::destination_vcfc, VCFCutoffCtrl.fvalue);  
         pEngine->ResetSynthesisParameters(Event::destination_vcfr, VCFResonanceCtrl.fvalue);  
     #endif // ENABLE_FILTER  
   
   
         // Apply events to the synthesis parameter matrix  
         ProcessEvents(Samples);  
   
   
         // Let all modulators write their parameter changes to the synthesis parameter matrix for the current audio fragment  
         pEG1->Process(Samples, pEngine->pMIDIKeyInfo[MIDIKey].pEvents, pTriggerEvent, this->Pos, this->PitchBase * this->PitchBend, pKillEvent);  
     #if ENABLE_FILTER  
         pEG2->Process(Samples, pEngine->pMIDIKeyInfo[MIDIKey].pEvents, pTriggerEvent, this->Pos, this->PitchBase * this->PitchBend);  
     #endif // ENABLE_FILTER  
         pEG3->Process(Samples);  
         pLFO1->Process(Samples);  
     #if ENABLE_FILTER  
         pLFO2->Process(Samples);  
     #endif // ENABLE_FILTER  
         pLFO3->Process(Samples);  
   
   
     #if ENABLE_FILTER  
         CalculateBiquadParameters(Samples); // calculate the final biquad filter parameters  
     #endif // ENABLE_FILTER  
   
   
         switch (this->PlaybackState) {  
   
             case playback_state_ram: {  
                     if (RAMLoop) InterpolateAndLoop(Samples, (sample_t*) pSample->GetCache().pStart, Delay);  
                     else         Interpolate(Samples, (sample_t*) pSample->GetCache().pStart, Delay);  
                     if (DiskVoice) {  
                         // check if we reached the allowed limit of the sample RAM cache  
                         if (Pos > MaxRAMPos) {  
                             dmsg(5,("Voice: switching to disk playback (Pos=%f)\n", Pos));  
                             this->PlaybackState = playback_state_disk;  
                         }  
                     }  
                     else if (Pos >= pSample->GetCache().Size / pSample->FrameSize) {  
                         this->PlaybackState = playback_state_end;  
                     }  
                 }  
                 break;  
   
             case playback_state_disk: {  
                     if (!DiskStreamRef.pStream) {  
                         // check if the disk thread created our ordered disk stream in the meantime  
                         DiskStreamRef.pStream = pDiskThread->AskForCreatedStream(DiskStreamRef.OrderID);  
                         if (!DiskStreamRef.pStream) {  
                             std::cout << stderr << "Disk stream not available in time!" << std::endl << std::flush;  
                             KillImmediately();  
                             return;  
                         }  
                         DiskStreamRef.pStream->IncrementReadPos(pSample->Channels * (RTMath::DoubleToInt(Pos) - MaxRAMPos));  
                         Pos -= RTMath::DoubleToInt(Pos);  
                     }  
   
                     // add silence sample at the end if we reached the end of the stream (for the interpolator)  
                     if (DiskStreamRef.State == Stream::state_end && DiskStreamRef.pStream->GetReadSpace() < (pEngine->MaxSamplesPerCycle << MAX_PITCH) / pSample->Channels) {  
                         DiskStreamRef.pStream->WriteSilence((pEngine->MaxSamplesPerCycle << MAX_PITCH) / pSample->Channels);  
                         this->PlaybackState = playback_state_end;  
                     }  
   
                     sample_t* ptr = DiskStreamRef.pStream->GetReadPtr(); // get the current read_ptr within the ringbuffer where we read the samples from  
                     Interpolate(Samples, ptr, Delay);  
                     DiskStreamRef.pStream->IncrementReadPos(RTMath::DoubleToInt(Pos) * pSample->Channels);  
                     Pos -= RTMath::DoubleToInt(Pos);  
                 }  
230                  break;                  break;
231                case ::gig::lfo1_ctrl_modwheel:
232              case playback_state_end:                  lfo1_internal_depth  = 0;
233                  KillImmediately(); // free voice                  pLFO1->ExtController = 1; // MIDI controller 1
234                    bLFO1Enabled         = (pRegion->LFO1ControlDepth > 0);
235                  break;                  break;
236                case ::gig::lfo1_ctrl_breath:
237                    lfo1_internal_depth  = 0;
238                    pLFO1->ExtController = 2; // MIDI controller 2
239                    bLFO1Enabled         = (pRegion->LFO1ControlDepth > 0);
240                    break;
241                case ::gig::lfo1_ctrl_internal_modwheel:
242                    lfo1_internal_depth  = pRegion->LFO1InternalDepth;
243                    pLFO1->ExtController = 1; // MIDI controller 1
244                    bLFO1Enabled         = (lfo1_internal_depth > 0 || pRegion->LFO1ControlDepth > 0);
245                    break;
246                case ::gig::lfo1_ctrl_internal_breath:
247                    lfo1_internal_depth  = pRegion->LFO1InternalDepth;
248                    pLFO1->ExtController = 2; // MIDI controller 2
249                    bLFO1Enabled         = (lfo1_internal_depth > 0 || pRegion->LFO1ControlDepth > 0);
250                    break;
251                default:
252                    lfo1_internal_depth  = 0;
253                    pLFO1->ExtController = 0; // no external controller
254                    bLFO1Enabled         = false;
255            }
256            if (bLFO1Enabled) {
257                pLFO1->trigger(pRegion->LFO1Frequency,
258                               start_level_min,
259                               lfo1_internal_depth,
260                               pRegion->LFO1ControlDepth,
261                               pRegion->LFO1FlipPhase,
262                               pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
263                pLFO1->update(pLFO1->ExtController ? GetGigEngineChannel()->ControllerTable[pLFO1->ExtController] : 0);
264          }          }
265        }
266    
267        void Voice::InitLFO2() {
268          // Reset synthesis event lists (except VCO, as VCO events apply channel wide currently)          uint16_t lfo2_internal_depth;
269          pEngine->pSynthesisEvents[Event::destination_vca]->clear();          switch (pRegion->LFO2Controller) {
270      #if ENABLE_FILTER              case ::gig::lfo2_ctrl_internal:
271          pEngine->pSynthesisEvents[Event::destination_vcfc]->clear();                  lfo2_internal_depth  = pRegion->LFO2InternalDepth;
272          pEngine->pSynthesisEvents[Event::destination_vcfr]->clear();                  pLFO2->ExtController = 0; // no external controller
273      #endif // ENABLE_FILTER                  bLFO2Enabled         = (lfo2_internal_depth > 0);
274                    break;
275          // Reset delay              case ::gig::lfo2_ctrl_modwheel:
276          Delay = 0;                  lfo2_internal_depth  = 0;
277                    pLFO2->ExtController = 1; // MIDI controller 1
278          pTriggerEvent = NULL;                  bLFO2Enabled         = (pRegion->LFO2ControlDepth > 0);
279                    break;
280          // If release stage finished, let the voice be killed              case ::gig::lfo2_ctrl_foot:
281          if (pEG1->GetStage() == EGADSR::stage_end) this->PlaybackState = playback_state_end;                  lfo2_internal_depth  = 0;
282      }                  pLFO2->ExtController = 4; // MIDI controller 4
283                    bLFO2Enabled         = (pRegion->LFO2ControlDepth > 0);
284      /**                  break;
285       *  Resets voice variables. Should only be called if rendering process is              case ::gig::lfo2_ctrl_internal_modwheel:
286       *  suspended / not running.                  lfo2_internal_depth  = pRegion->LFO2InternalDepth;
287       */                  pLFO2->ExtController = 1; // MIDI controller 1
288      void Voice::Reset() {                  bLFO2Enabled         = (lfo2_internal_depth > 0 || pRegion->LFO2ControlDepth > 0);
289          pLFO1->Reset();                  break;
290          pLFO2->Reset();              case ::gig::lfo2_ctrl_internal_foot:
291          pLFO3->Reset();                  lfo2_internal_depth  = pRegion->LFO2InternalDepth;
292          DiskStreamRef.pStream = NULL;                  pLFO2->ExtController = 4; // MIDI controller 4
293          DiskStreamRef.hStream = 0;                  bLFO2Enabled         = (lfo2_internal_depth > 0 || pRegion->LFO2ControlDepth > 0);
294          DiskStreamRef.State   = Stream::state_unused;                  break;
295          DiskStreamRef.OrderID = 0;              default:
296          Active = false;                  lfo2_internal_depth  = 0;
297      }                  pLFO2->ExtController = 0; // no external controller
298                    bLFO2Enabled         = false;
299      /**          }
300       *  Process the control change event lists of the engine for the current          if (bLFO2Enabled) {
301       *  audio fragment. Event values will be applied to the synthesis parameter              pLFO2->trigger(pRegion->LFO2Frequency,
302       *  matrix.                             start_level_max,
303       *                             lfo2_internal_depth,
304       *  @param Samples - number of samples to be rendered in this audio fragment cycle                             pRegion->LFO2ControlDepth,
305       */                             pRegion->LFO2FlipPhase,
306      void Voice::ProcessEvents(uint Samples) {                             pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
307                pLFO2->update(pLFO2->ExtController ? GetGigEngineChannel()->ControllerTable[pLFO2->ExtController] : 0);
         // dispatch control change events  
         Event* pCCEvent = pEngine->pCCEvents->first();  
         if (Delay) { // skip events that happened before this voice was triggered  
             while (pCCEvent && pCCEvent->FragmentPos() <= Delay) pCCEvent = pEngine->pCCEvents->next();  
         }  
         while (pCCEvent) {  
             if (pCCEvent->Controller) { // if valid MIDI controller  
                 #if ENABLE_FILTER  
                 if (pCCEvent->Controller == VCFCutoffCtrl.controller) {  
                     pEngine->pSynthesisEvents[Event::destination_vcfc]->alloc_assign(*pCCEvent);  
                 }  
                 if (pCCEvent->Controller == VCFResonanceCtrl.controller) {  
                     pEngine->pSynthesisEvents[Event::destination_vcfr]->alloc_assign(*pCCEvent);  
                 }  
                 #endif // ENABLE_FILTER  
                 if (pCCEvent->Controller == pLFO1->ExtController) {  
                     pLFO1->SendEvent(pCCEvent);  
                 }  
                 #if ENABLE_FILTER  
                 if (pCCEvent->Controller == pLFO2->ExtController) {  
                     pLFO2->SendEvent(pCCEvent);  
                 }  
                 #endif // ENABLE_FILTER  
                 if (pCCEvent->Controller == pLFO3->ExtController) {  
                     pLFO3->SendEvent(pCCEvent);  
                 }  
                 if (pDimRgn->AttenuationController.type == ::gig::attenuation_ctrl_t::type_controlchange &&  
                     pCCEvent->Controller == pDimRgn->AttenuationController.controller_number) { // if crossfade event  
                     pEngine->pSynthesisEvents[Event::destination_vca]->alloc_assign(*pCCEvent);  
                 }  
             }  
   
             pCCEvent = pEngine->pCCEvents->next();  
308          }          }
309        }
310    
311        void Voice::InitLFO3() {
312          // process pitch events          uint16_t lfo3_internal_depth;
313          {          switch (pRegion->LFO3Controller) {
314              RTEList<Event>* pVCOEventList = pEngine->pSynthesisEvents[Event::destination_vco];              case ::gig::lfo3_ctrl_internal:
315              Event* pVCOEvent = pVCOEventList->first();                  lfo3_internal_depth  = pRegion->LFO3InternalDepth;
316              if (Delay) { // skip events that happened before this voice was triggered                  pLFO3->ExtController = 0; // no external controller
317                  while (pVCOEvent && pVCOEvent->FragmentPos() <= Delay) pVCOEvent = pVCOEventList->next();                  bLFO3Enabled         = (lfo3_internal_depth > 0);
318              }                  break;
319              // apply old pitchbend value until first pitch event occurs              case ::gig::lfo3_ctrl_modwheel:
320              if (this->PitchBend != 1.0) {                  lfo3_internal_depth  = 0;
321                  uint end = (pVCOEvent) ? pVCOEvent->FragmentPos() : Samples;                  pLFO3->ExtController = 1; // MIDI controller 1
322                  for (uint i = Delay; i < end; i++) {                  bLFO3Enabled         = (pRegion->LFO3ControlDepth > 0);
323                      pEngine->pSynthesisParameters[Event::destination_vco][i] *= this->PitchBend;                  break;
324                  }              case ::gig::lfo3_ctrl_aftertouch:
325              }                  lfo3_internal_depth  = 0;
326              float pitch;                  pLFO3->ExtController = 128;
327              while (pVCOEvent) {                  bLFO3Enabled         = true;
328                  Event* pNextVCOEvent = pVCOEventList->next();                  break;
329                case ::gig::lfo3_ctrl_internal_modwheel:
330                  // calculate the influence length of this event (in sample points)                  lfo3_internal_depth  = pRegion->LFO3InternalDepth;
331                  uint end = (pNextVCOEvent) ? pNextVCOEvent->FragmentPos() : Samples;                  pLFO3->ExtController = 1; // MIDI controller 1
332                    bLFO3Enabled         = (lfo3_internal_depth > 0 || pRegion->LFO3ControlDepth > 0);
333                  pitch = RTMath::CentsToFreqRatio(((double) pVCOEvent->Pitch / 8192.0) * 200.0); // +-two semitones = +-200 cents                  break;
334                case ::gig::lfo3_ctrl_internal_aftertouch:
335                  // apply pitch value to the pitch parameter sequence                  lfo3_internal_depth  = pRegion->LFO3InternalDepth;
336                  for (uint i = pVCOEvent->FragmentPos(); i < end; i++) {                  pLFO3->ExtController = 128;
337                      pEngine->pSynthesisParameters[Event::destination_vco][i] *= pitch;                  bLFO3Enabled         = (lfo3_internal_depth > 0 || pRegion->LFO3ControlDepth > 0);
338                  }                  break;
339                default:
340                  pVCOEvent = pNextVCOEvent;                  lfo3_internal_depth  = 0;
341              }                  pLFO3->ExtController = 0; // no external controller
342              if (pVCOEventList->last()) this->PitchBend = pitch;                  bLFO3Enabled         = false;
343            }
344            if (bLFO3Enabled) {
345                pLFO3->trigger(pRegion->LFO3Frequency,
346                               start_level_mid,
347                               lfo3_internal_depth,
348                               pRegion->LFO3ControlDepth,
349                               false,
350                               pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
351                pLFO3->update(pLFO3->ExtController ? GetGigEngineChannel()->ControllerTable[pLFO3->ExtController] : 0);
352          }          }
353        }
354    
355          // process volume / attenuation events (TODO: we only handle and _expect_ crossfade events here ATM !)      float Voice::CalculateCutoffBase(uint8_t MIDIKeyVelocity) {
356          {          float cutoff = pRegion->GetVelocityCutoff(MIDIKeyVelocity);
357              RTEList<Event>* pVCAEventList = pEngine->pSynthesisEvents[Event::destination_vca];          if (pRegion->VCFKeyboardTracking) {
358              Event* pVCAEvent = pVCAEventList->first();              cutoff *= RTMath::CentsToFreqRatioUnlimited((MIDIKey - pRegion->VCFKeyboardTrackingBreakpoint) * 100);
359              if (Delay) { // skip events that happened before this voice was triggered          }
360                  while (pVCAEvent && pVCAEvent->FragmentPos() <= Delay) pVCAEvent = pVCAEventList->next();          return cutoff;
361              }      }
362              float crossfadevolume;  
363              while (pVCAEvent) {      float Voice::CalculateFinalCutoff(float cutoffBase) {
364                  Event* pNextVCAEvent = pVCAEventList->next();          int cvalue;
365            if (VCFCutoffCtrl.controller) {
366                  // calculate the influence length of this event (in sample points)              cvalue = GetGigEngineChannel()->ControllerTable[VCFCutoffCtrl.controller];
367                  uint end = (pNextVCAEvent) ? pNextVCAEvent->FragmentPos() : Samples;              if (pRegion->VCFCutoffControllerInvert) cvalue = 127 - cvalue;
368                // VCFVelocityScale in this case means Minimum cutoff
369                  crossfadevolume = CrossfadeAttenuation(pVCAEvent->Value);              if (cvalue < pRegion->VCFVelocityScale) cvalue = pRegion->VCFVelocityScale;
   
                 float effective_volume = crossfadevolume * this->Volume * pEngine->GlobalVolume;  
   
                 // apply volume value to the volume parameter sequence  
                 for (uint i = pVCAEvent->FragmentPos(); i < end; i++) {  
                     pEngine->pSynthesisParameters[Event::destination_vca][i] = effective_volume;  
                 }  
   
                 pVCAEvent = pNextVCAEvent;  
             }  
             if (pVCAEventList->last()) this->CrossfadeVolume = crossfadevolume;  
370          }          }
371            else {
372      #if ENABLE_FILTER              cvalue = pRegion->VCFCutoff;
         // process filter cutoff events  
         {  
             RTEList<Event>* pCutoffEventList = pEngine->pSynthesisEvents[Event::destination_vcfc];  
             Event* pCutoffEvent = pCutoffEventList->first();  
             if (Delay) { // skip events that happened before this voice was triggered  
                 while (pCutoffEvent && pCutoffEvent->FragmentPos() <= Delay) pCutoffEvent = pCutoffEventList->next();  
             }  
             float cutoff;  
             while (pCutoffEvent) {  
                 Event* pNextCutoffEvent = pCutoffEventList->next();  
   
                 // calculate the influence length of this event (in sample points)  
                 uint end = (pNextCutoffEvent) ? pNextCutoffEvent->FragmentPos() : Samples;  
   
                 cutoff = exp((float) pCutoffEvent->Value * 0.00787402f * FILTER_CUTOFF_COEFF) * FILTER_CUTOFF_MAX - FILTER_CUTOFF_MIN;  
   
                 // apply cutoff frequency to the cutoff parameter sequence  
                 for (uint i = pCutoffEvent->FragmentPos(); i < end; i++) {  
                     pEngine->pSynthesisParameters[Event::destination_vcfc][i] = cutoff;  
                 }  
   
                 pCutoffEvent = pNextCutoffEvent;  
             }  
             if (pCutoffEventList->last()) VCFCutoffCtrl.fvalue = cutoff; // needed for initialization of parameter matrix next time  
373          }          }
374            float fco = cutoffBase * float(cvalue);
375            if (fco > 127.0f) fco = 127.0f;
376    
377          // process filter resonance events          return fco;
         {  
             RTEList<Event>* pResonanceEventList = pEngine->pSynthesisEvents[Event::destination_vcfr];  
             Event* pResonanceEvent = pResonanceEventList->first();  
             if (Delay) { // skip events that happened before this voice was triggered  
                 while (pResonanceEvent && pResonanceEvent->FragmentPos() <= Delay) pResonanceEvent = pResonanceEventList->next();  
             }  
             while (pResonanceEvent) {  
                 Event* pNextResonanceEvent = pResonanceEventList->next();  
   
                 // calculate the influence length of this event (in sample points)  
                 uint end = (pNextResonanceEvent) ? pNextResonanceEvent->FragmentPos() : Samples;  
   
                 // convert absolute controller value to differential  
                 int ctrldelta = pResonanceEvent->Value - VCFResonanceCtrl.value;  
                 VCFResonanceCtrl.value = pResonanceEvent->Value;  
   
                 float resonancedelta = (float) ctrldelta * 0.00787f; // 0.0..1.0  
   
                 // apply cutoff frequency to the cutoff parameter sequence  
                 for (uint i = pResonanceEvent->FragmentPos(); i < end; i++) {  
                     pEngine->pSynthesisParameters[Event::destination_vcfr][i] += resonancedelta;  
                 }  
   
                 pResonanceEvent = pNextResonanceEvent;  
             }  
             if (pResonanceEventList->last()) VCFResonanceCtrl.fvalue = pResonanceEventList->last()->Value * 0.00787f; // needed for initialization of parameter matrix next time  
         }  
     #endif // ENABLE_FILTER  
378      }      }
379    
380      #if ENABLE_FILTER      uint8_t Voice::GetVCFCutoffCtrl() {
381      /**          uint8_t ctrl;
382       * Calculate all necessary, final biquad filter parameters.          switch (pRegion->VCFCutoffController) {
383       *              case ::gig::vcf_cutoff_ctrl_modwheel:
384       * @param Samples - number of samples to be rendered in this audio fragment cycle                  ctrl = 1;
385       */                  break;
386      void Voice::CalculateBiquadParameters(uint Samples) {              case ::gig::vcf_cutoff_ctrl_effect1:
387          if (!FilterLeft.Enabled) return;                  ctrl = 12;
388                    break;
389          biquad_param_t bqbase;              case ::gig::vcf_cutoff_ctrl_effect2:
390          biquad_param_t bqmain;                  ctrl = 13;
391          float prev_cutoff = pEngine->pSynthesisParameters[Event::destination_vcfc][0];                  break;
392          float prev_res    = pEngine->pSynthesisParameters[Event::destination_vcfr][0];              case ::gig::vcf_cutoff_ctrl_breath:
393          FilterLeft.SetParameters(&bqbase, &bqmain, prev_cutoff, prev_res, pEngine->SampleRate);                  ctrl = 2;
394          pEngine->pBasicFilterParameters[0] = bqbase;                  break;
395          pEngine->pMainFilterParameters[0]  = bqmain;              case ::gig::vcf_cutoff_ctrl_foot:
396                    ctrl = 4;
397          float* bq;                  break;
398          for (int i = 1; i < Samples; i++) {              case ::gig::vcf_cutoff_ctrl_sustainpedal:
399              // recalculate biquad parameters if cutoff or resonance differ from previous sample point                  ctrl = 64;
400              if (!(i & FILTER_UPDATE_MASK)) if (pEngine->pSynthesisParameters[Event::destination_vcfr][i] != prev_res ||                  break;
401                                                 pEngine->pSynthesisParameters[Event::destination_vcfc][i] != prev_cutoff) {              case ::gig::vcf_cutoff_ctrl_softpedal:
402                  prev_cutoff = pEngine->pSynthesisParameters[Event::destination_vcfc][i];                  ctrl = 67;
403                  prev_res    = pEngine->pSynthesisParameters[Event::destination_vcfr][i];                  break;
404                  FilterLeft.SetParameters(&bqbase, &bqmain, prev_cutoff, prev_res, pEngine->SampleRate);              case ::gig::vcf_cutoff_ctrl_genpurpose7:
405              }                  ctrl = 82;
406                    break;
407              //same as 'pEngine->pBasicFilterParameters[i] = bqbase;'              case ::gig::vcf_cutoff_ctrl_genpurpose8:
408              bq    = (float*) &pEngine->pBasicFilterParameters[i];                  ctrl = 83;
409              bq[0] = bqbase.a1;                  break;
410              bq[1] = bqbase.a2;              case ::gig::vcf_cutoff_ctrl_aftertouch:
411              bq[2] = bqbase.b0;                  ctrl = 128;
412              bq[3] = bqbase.b1;                  break;
413              bq[4] = bqbase.b2;              case ::gig::vcf_cutoff_ctrl_none:
414                default:
415              // same as 'pEngine->pMainFilterParameters[i] = bqmain;'                  ctrl = 0;
416              bq    = (float*) &pEngine->pMainFilterParameters[i];                  break;
             bq[0] = bqmain.a1;  
             bq[1] = bqmain.a2;  
             bq[2] = bqmain.b0;  
             bq[3] = bqmain.b1;  
             bq[4] = bqmain.b2;  
417          }          }
     }  
     #endif // ENABLE_FILTER  
418    
419      /**          return ctrl;
      *  Interpolates the input audio data (no loop).  
      *  
      *  @param Samples - number of sample points to be rendered in this audio  
      *                   fragment cycle  
      *  @param pSrc    - pointer to input sample data  
      *  @param Skip    - number of sample points to skip in output buffer  
      */  
     void Voice::Interpolate(uint Samples, sample_t* pSrc, uint Skip) {  
         int i = Skip;  
   
         // FIXME: assuming either mono or stereo  
         if (this->pSample->Channels == 2) { // Stereo Sample  
             while (i < Samples) {  
                 InterpolateOneStep_Stereo(pSrc, i,  
                                           pEngine->pSynthesisParameters[Event::destination_vca][i],  
                                           pEngine->pSynthesisParameters[Event::destination_vco][i],  
                                           pEngine->pBasicFilterParameters[i],  
                                           pEngine->pMainFilterParameters[i]);  
             }  
         }  
         else { // Mono Sample  
             while (i < Samples) {  
                 InterpolateOneStep_Mono(pSrc, i,  
                                         pEngine->pSynthesisParameters[Event::destination_vca][i],  
                                         pEngine->pSynthesisParameters[Event::destination_vco][i],  
                                         pEngine->pBasicFilterParameters[i],  
                                         pEngine->pMainFilterParameters[i]);  
             }  
         }  
420      }      }
421    
422      /**      uint8_t Voice::GetVCFResonanceCtrl() {
423       *  Interpolates the input audio data, this method honors looping.          uint8_t ctrl;
424       *          switch (pRegion->VCFResonanceController) {
425       *  @param Samples - number of sample points to be rendered in this audio              case ::gig::vcf_res_ctrl_genpurpose3:
426       *                   fragment cycle                  ctrl = 18;
427       *  @param pSrc    - pointer to input sample data                  break;
428       *  @param Skip    - number of sample points to skip in output buffer              case ::gig::vcf_res_ctrl_genpurpose4:
429       */                  ctrl = 19;
430      void Voice::InterpolateAndLoop(uint Samples, sample_t* pSrc, uint Skip) {                  break;
431          int i = Skip;              case ::gig::vcf_res_ctrl_genpurpose5:
432                    ctrl = 80;
433          // FIXME: assuming either mono or stereo                  break;
434          if (pSample->Channels == 2) { // Stereo Sample              case ::gig::vcf_res_ctrl_genpurpose6:
435              if (pSample->LoopPlayCount) {                  ctrl = 81;
436                  // render loop (loop count limited)                  break;
437                  while (i < Samples && LoopCyclesLeft) {              case ::gig::vcf_res_ctrl_none:
438                      InterpolateOneStep_Stereo(pSrc, i,              default:
439                                                pEngine->pSynthesisParameters[Event::destination_vca][i],                  ctrl = 0;
                                               pEngine->pSynthesisParameters[Event::destination_vco][i],  
                                               pEngine->pBasicFilterParameters[i],  
                                               pEngine->pMainFilterParameters[i]);  
                     if (Pos > pSample->LoopEnd) {  
                         Pos = pSample->LoopStart + fmod(Pos - pSample->LoopEnd, pSample->LoopSize);;  
                         LoopCyclesLeft--;  
                     }  
                 }  
                 // render on without loop  
                 while (i < Samples) {  
                     InterpolateOneStep_Stereo(pSrc, i,  
                                               pEngine->pSynthesisParameters[Event::destination_vca][i],  
                                               pEngine->pSynthesisParameters[Event::destination_vco][i],  
                                               pEngine->pBasicFilterParameters[i],  
                                               pEngine->pMainFilterParameters[i]);  
                 }  
             }  
             else { // render loop (endless loop)  
                 while (i < Samples) {  
                     InterpolateOneStep_Stereo(pSrc, i,  
                                               pEngine->pSynthesisParameters[Event::destination_vca][i],  
                                               pEngine->pSynthesisParameters[Event::destination_vco][i],  
                                               pEngine->pBasicFilterParameters[i],  
                                               pEngine->pMainFilterParameters[i]);  
                     if (Pos > pSample->LoopEnd) {  
                         Pos = pSample->LoopStart + fmod(Pos - pSample->LoopEnd, pSample->LoopSize);  
                     }  
                 }  
             }  
         }  
         else { // Mono Sample  
             if (pSample->LoopPlayCount) {  
                 // render loop (loop count limited)  
                 while (i < Samples && LoopCyclesLeft) {  
                     InterpolateOneStep_Mono(pSrc, i,  
                                             pEngine->pSynthesisParameters[Event::destination_vca][i],  
                                             pEngine->pSynthesisParameters[Event::destination_vco][i],  
                                             pEngine->pBasicFilterParameters[i],  
                                             pEngine->pMainFilterParameters[i]);  
                     if (Pos > pSample->LoopEnd) {  
                         Pos = pSample->LoopStart + fmod(Pos - pSample->LoopEnd, pSample->LoopSize);;  
                         LoopCyclesLeft--;  
                     }  
                 }  
                 // render on without loop  
                 while (i < Samples) {  
                     InterpolateOneStep_Mono(pSrc, i,  
                                             pEngine->pSynthesisParameters[Event::destination_vca][i],  
                                             pEngine->pSynthesisParameters[Event::destination_vco][i],  
                                             pEngine->pBasicFilterParameters[i],  
                                             pEngine->pMainFilterParameters[i]);  
                 }  
             }  
             else { // render loop (endless loop)  
                 while (i < Samples) {  
                     InterpolateOneStep_Mono(pSrc, i,  
                                             pEngine->pSynthesisParameters[Event::destination_vca][i],  
                                             pEngine->pSynthesisParameters[Event::destination_vco][i],  
                                             pEngine->pBasicFilterParameters[i],  
                                             pEngine->pMainFilterParameters[i]);  
                     if (Pos > pSample->LoopEnd) {  
                         Pos = pSample->LoopStart + fmod(Pos - pSample->LoopEnd, pSample->LoopSize);;  
                     }  
                 }  
             }  
440          }          }
     }  
441    
442      /**          return ctrl;
      *  Immediately kill the voice. This method should not be used to kill  
      *  a normal, active voice, because it doesn't take care of things like  
      *  fading down the volume level to avoid clicks and regular processing  
      *  until the kill event actually occured!  
      *  
      *  @see Kill()  
      */  
     void Voice::KillImmediately() {  
         if (DiskVoice && DiskStreamRef.State != Stream::state_unused) {  
             pDiskThread->OrderDeletionOfStream(&DiskStreamRef);  
         }  
         Reset();  
443      }      }
444    
445      /**      void Voice::TriggerEG1(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) {
446       *  Kill the voice in regular sense. Let the voice render audio until          EG1.trigger(pRegion->EG1PreAttack,
447       *  the kill event actually occured and then fade down the volume level                      pRegion->EG1Attack * egInfo.Attack,
448       *  very quickly and let the voice die finally. Unlike a normal release                      pRegion->EG1Hold,
449       *  of a voice, a kill process cannot be cancalled and is therefore                      pRegion->EG1Decay1 * egInfo.Decay * velrelease,
450       *  usually used for voice stealing and key group conflicts.                      pRegion->EG1Decay2 * egInfo.Decay * velrelease,
451       *                      pRegion->EG1InfiniteSustain,
452       *  @param pKillEvent - event which caused the voice to be killed                      pRegion->EG1Sustain,
453       */                      pRegion->EG1Release * egInfo.Release * velrelease,
454      void Voice::Kill(Event* pKillEvent) {                      velocityAttenuation,
455          if (pTriggerEvent && pKillEvent->FragmentPos() <= pTriggerEvent->FragmentPos()) return;                      sampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
456          this->pKillEvent = pKillEvent;      }
457    
458        void Voice::TriggerEG2(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) {
459            EG2.trigger(uint(RgnInfo.EG2PreAttack),
460                        RgnInfo.EG2Attack * egInfo.Attack,
461                        false,
462                        RgnInfo.EG2Decay1 * egInfo.Decay * velrelease,
463                        RgnInfo.EG2Decay2 * egInfo.Decay * velrelease,
464                        RgnInfo.EG2InfiniteSustain,
465                        uint(RgnInfo.EG2Sustain),
466                        RgnInfo.EG2Release * egInfo.Release * velrelease,
467                        velocityAttenuation,
468                        sampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
469        }
470    
471        void Voice::ProcessGroupEvent(RTList<Event>::Iterator& itEvent) {
472            dmsg(4,("Voice %x processGroupEvents event type=%d", this, itEvent->Type));
473    
474            // TODO: The SustainPedal condition could be wrong, maybe the
475            // check should be if this Voice is in release stage or is a
476            // release sample instead. Need to test this in GSt.
477            // -- Andreas
478            //
479            // Commented sustain pedal check out. I don't think voices of the same
480            // note should be stopped at all, because it doesn't sound naturally
481            // with a drumkit.
482            // -- Christian, 2013-01-08
483            if (itEvent->Param.Note.Key != MIDIKey /*||
484                !GetGigEngineChannel()->SustainPedal*/) {
485                dmsg(4,("Voice %x - kill", this));
486    
487                // kill the voice fast
488                pEG1->enterFadeOutStage();
489            }
490        }
491    
492        void Voice::CalculateFadeOutCoeff(float FadeOutTime, float SampleRate) {
493            EG1.CalculateFadeOutCoeff(FadeOutTime, SampleRate);
494        }
495    
496        int Voice::CalculatePan(uint8_t pan) {
497            int p;
498            // Gst behaviour: -64 and 63 are special cases
499            if (RgnInfo.Pan == -64)     p = pan * 2 - 127;
500            else if (RgnInfo.Pan == 63) p = pan * 2;
501            else                        p = pan + RgnInfo.Pan;
502    
503            if (p < 0) return 0;
504            if (p > 127) return 127;
505            return p;
506      }      }
507    
508  }} // namespace LinuxSampler::gig  }} // namespace LinuxSampler::gig
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