/[svn]/linuxsampler/trunk/src/engines/gig/Voice.cpp
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revision 354 by schoenebeck, Sat Jan 29 15:17:59 2005 UTC revision 3721 by schoenebeck, Mon Jan 20 15:10:05 2020 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 Christian Schoenebeck and Grigor Iliev             *
8     *   Copyright (C) 2010 - 2017 Christian Schoenebeck and Andreas Persson   *
9   *                                                                         *   *                                                                         *
10   *   This program is free software; you can redistribute it and/or modify  *   *   This program is free software; you can redistribute it and/or modify  *
11   *   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 23 
23   *   MA  02111-1307  USA                                                   *   *   MA  02111-1307  USA                                                   *
24   ***************************************************************************/   ***************************************************************************/
25    
 #include "EGADSR.h"  
 #include "Manipulator.h"  
26  #include "../../common/Features.h"  #include "../../common/Features.h"
27  #include "Synthesizer.h"  #include "Synthesizer.h"
28    #include "Profiler.h"
29    #include "Engine.h"
30    #include "EngineChannel.h"
31    
32  #include "Voice.h"  #include "Voice.h"
33    
34  namespace LinuxSampler { namespace gig {  namespace LinuxSampler { namespace gig {
35    
36      const float Voice::FILTER_CUTOFF_COEFF(CalculateFilterCutoffCoeff());      // sanity checks: fromGigLfoWave() assumes equally mapped enums
37        static_assert(int64_t(::gig::lfo_wave_sine) == int64_t(LFO::wave_sine),
38      const int Voice::FILTER_UPDATE_MASK(CalculateFilterUpdateMask());                    "enum LFO::wave_t not equally value mapped to libgig's enum ::gig::lfo_wave_t");
39        static_assert(int64_t(::gig::lfo_wave_triangle) == int64_t(LFO::wave_triangle),
40      float Voice::CalculateFilterCutoffCoeff() {                    "enum LFO::wave_t not equally value mapped to libgig's enum ::gig::lfo_wave_t");
41          return log(FILTER_CUTOFF_MIN / FILTER_CUTOFF_MAX);      static_assert(int64_t(::gig::lfo_wave_saw) == int64_t(LFO::wave_saw),
42      }                    "enum LFO::wave_t not equally value mapped to libgig's enum ::gig::lfo_wave_t");
43        static_assert(int64_t(::gig::lfo_wave_square) == int64_t(LFO::wave_square),
44      int Voice::CalculateFilterUpdateMask() {                    "enum LFO::wave_t not equally value mapped to libgig's enum ::gig::lfo_wave_t");
45          if (FILTER_UPDATE_PERIOD <= 0) return 0;  
46          int power_of_two;      // converts ::gig::lfo_wave_t (libgig) -> LFO::wave_t (LinuxSampler)
47          for (power_of_two = 0; 1<<power_of_two < FILTER_UPDATE_PERIOD; power_of_two++);      inline LFO::wave_t fromGigLfoWave(::gig::lfo_wave_t wave) {
48          return (1 << power_of_two) - 1;          // simply assuming equally mapped enums on both sides
49            return static_cast<LFO::wave_t>(wave);
50        }
51    
52        // Returns true for GigaStudio's original filter types (which are resembled
53        // by LS very accurately with same frequency response and patch settings
54        // behaviour), false for our own LS specific filter implementation types.
55        constexpr bool isGStFilterType(::gig::vcf_type_t type) {
56            return type == ::gig::vcf_type_lowpass ||
57                   type == ::gig::vcf_type_lowpassturbo ||
58                   type == ::gig::vcf_type_bandpass ||
59                   type == ::gig::vcf_type_highpass ||
60                   type == ::gig::vcf_type_bandreject;
61      }      }
62    
63      Voice::Voice() {      Voice::Voice() {
64          pEngine     = NULL;          pEngine = NULL;
65          pDiskThread = NULL;          pEG1 = &EG1;
66          PlaybackState = playback_state_end;          pEG2 = &EG2;
         pEG1   = NULL;  
         pEG2   = NULL;  
         pEG3   = NULL;  
         pVCAManipulator  = NULL;  
         pVCFCManipulator = NULL;  
         pVCOManipulator  = NULL;  
         pLFO1  = NULL;  
         pLFO2  = NULL;  
         pLFO3  = NULL;  
         KeyGroup = 0;  
         SynthesisMode = 0; //Set all mode bits to 0 first  
   
         // select synthesis implementation (currently either pure C++ or MMX+SSE(1))  
         SYNTHESIS_MODE_SET_IMPLEMENTATION(SynthesisMode, Features::supportsMMX() && Features::supportsSSE());  
         SYNTHESIS_MODE_SET_PROFILING(SynthesisMode, true);  
67      }      }
68    
69      Voice::~Voice() {      Voice::~Voice() {
70          if (pEG1)  delete pEG1;      }
         if (pEG2)  delete pEG2;  
         if (pEG3)  delete pEG3;  
         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.  
71    
72          this->pDiskThread = pEngine->pDiskThread;      EngineChannel* Voice::GetGigEngineChannel() {
73            return static_cast<EngineChannel*>(pEngineChannel);
74        }
75    
76        void Voice::SetEngine(LinuxSampler::Engine* pEngine) {
77            Engine* engine = static_cast<Engine*>(pEngine);
78            this->pEngine     = engine;
79            this->pDiskThread = engine->pDiskThread;
80          dmsg(6,("Voice::SetEngine()\n"));          dmsg(6,("Voice::SetEngine()\n"));
81      }      }
82    
83      /**      Voice::SampleInfo Voice::GetSampleInfo() {
84       *  Initializes and triggers the voice, a disk stream will be launched if          SampleInfo si;
85       *  needed.          si.SampleRate       = pSample->SamplesPerSecond;
86       *          si.ChannelCount     = pSample->Channels;
87       *  @param itNoteOnEvent       - event that caused triggering of this voice          si.FrameSize        = pSample->FrameSize;
88       *  @param PitchBend           - MIDI detune factor (-8192 ... +8191)          si.BitDepth         = pSample->BitDepth;
89       *  @param pInstrument         - points to the loaded instrument which provides sample wave(s) and articulation data          si.TotalFrameCount  = (uint)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)  
      *  @param VoiceStealing       - wether the voice is allowed to steal voices for further subvoices  
      *  @returns 0 on success, a value < 0 if the voice wasn't triggered  
      *           (either due to an error or e.g. because no region is  
      *           defined for the given key)  
      */  
     int Voice::Trigger(Pool<Event>::Iterator& itNoteOnEvent, int PitchBend, ::gig::Instrument* pInstrument, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing) {  
         if (!pInstrument) {  
            dmsg(1,("voice::trigger: !pInstrument\n"));  
            exit(EXIT_FAILURE);  
         }  
         if (itNoteOnEvent->FragmentPos() > pEngine->MaxSamplesPerCycle) { // FIXME: should be removed before the final release (purpose: just a sanity check for debugging)  
             dmsg(1,("Voice::Trigger(): ERROR, TriggerDelay > Totalsamples\n"));  
         }  
90    
91          Type            = type_normal;          si.HasLoops       = pRegion->SampleLoops;
92          MIDIKey         = itNoteOnEvent->Param.Note.Key;          si.LoopStart      = (si.HasLoops) ? pRegion->pSampleLoops[0].LoopStart  : 0;
93          pRegion         = pInstrument->GetRegion(MIDIKey);          si.LoopLength     = (si.HasLoops) ? pRegion->pSampleLoops[0].LoopLength : 0;
94          PlaybackState   = playback_state_ram; // we always start playback from RAM cache and switch then to disk if needed          si.LoopPlayCount  = pSample->LoopPlayCount;
95          Delay           = itNoteOnEvent->FragmentPos();          si.Unpitched      = !pRegion->PitchTrack;
         itTriggerEvent  = itNoteOnEvent;  
         itKillEvent     = Pool<Event>::Iterator();  
         itChildVoice    = Pool<Voice>::Iterator();  
   
         if (!pRegion) {  
             dmsg(4, ("gig::Voice: No Region defined for MIDI key %d\n", MIDIKey));  
             return -1;  
         }  
96    
97          KeyGroup = pRegion->KeyGroup;          return si;
98        }
         // get current dimension values to select the right dimension region  
         //FIXME: controller values for selecting the dimension region here are currently not sample accurate  
         uint DimValues[8] = { 0 };  
         for (int i = pRegion->Dimensions - 1; i >= 0; i--) {  
             switch (pRegion->pDimensionDefinitions[i].dimension) {  
                 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++)  
                             itChildVoice = pEngine->LaunchVoice(itNoteOnEvent, iNewLayer, ReleaseTriggerVoice, VoiceStealing);  
                     break;  
                 case ::gig::dimension_velocity:  
                     DimValues[i] = itNoteOnEvent->Param.Note.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) pEngine->CurrentKeyDimension;  
                     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);  
99    
100          pSample = pDimRgn->pSample; // sample won't change until the voice is finished      Voice::RegionInfo Voice::GetRegionInfo() {
101          if (!pSample || !pSample->SamplesTotal) return -1; // no need to continue if sample is silent          RegionInfo ri;
102            ri.UnityNote = pRegion->UnityNote;
103            ri.FineTune  = pRegion->FineTune;
104            ri.Pan       = pRegion->Pan;
105            ri.SampleStartOffset = pRegion->SampleStartOffset;
106    
107          // select channel mode (mono or stereo)          ri.EG2PreAttack        = pRegion->EG2PreAttack;
108          SYNTHESIS_MODE_SET_CHANNELS(SynthesisMode, pSample->Channels == 2);          ri.EG2Attack           = pRegion->EG2Attack;
109            ri.EG2Decay1           = pRegion->EG2Decay1;
110            ri.EG2Decay2           = pRegion->EG2Decay2;
111            ri.EG2Sustain          = pRegion->EG2Sustain;
112            ri.EG2InfiniteSustain  = pRegion->EG2InfiniteSustain;
113            ri.EG2Release          = pRegion->EG2Release;
114    
115          // get starting crossfade volume level          ri.EG3Attack     = pRegion->EG3Attack;
116          switch (pDimRgn->AttenuationController.type) {          ri.EG3Depth      = pRegion->EG3Depth;
117              case ::gig::attenuation_ctrl_t::type_channelaftertouch:          ri.VCFEnabled    = pRegion->VCFEnabled;
118                  CrossfadeVolume = 1.0f; //TODO: aftertouch not supported yet          ri.VCFType       = Filter::vcf_type_t(pRegion->VCFType);
119                  break;          ri.VCFResonance  = pRegion->VCFResonance;
             case ::gig::attenuation_ctrl_t::type_velocity:  
                 CrossfadeVolume = CrossfadeAttenuation(itNoteOnEvent->Param.Note.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;  
         }  
120    
121          PanLeft  = 1.0f - float(RTMath::Max(pDimRgn->Pan, 0)) /  63.0f;          ri.ReleaseTriggerDecay = 0.01053 * (256 >> pRegion->ReleaseTriggerDecay);
         PanRight = 1.0f - float(RTMath::Min(pDimRgn->Pan, 0)) / -64.0f;  
122    
123          Pos = pDimRgn->SampleStartOffset; // offset where we should start playback of sample (0 - 2000 sample points)          return ri;
124        }
125    
126          // Check if the sample needs disk streaming or is too short for that      Voice::InstrumentInfo Voice::GetInstrumentInfo() {
127          long cachedsamples = pSample->GetCache().Size / pSample->FrameSize;          InstrumentInfo ii;
128          DiskVoice          = cachedsamples < pSample->SamplesTotal;          ii.FineTune = GetGigEngineChannel()->pInstrument->FineTune;
129            ii.PitchbendRange = GetGigEngineChannel()->pInstrument->PitchbendRange;
         if (DiskVoice) { // voice to be streamed from disk  
             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)  
   
             // check if there's a loop defined which completely fits into the cached (RAM) part of the sample  
             if (pSample->Loops && pSample->LoopEnd <= MaxRAMPos) {  
                 RAMLoop        = true;  
                 LoopCyclesLeft = pSample->LoopPlayCount;  
             }  
             else RAMLoop = false;  
130    
131              if (pDiskThread->OrderNewStream(&DiskStreamRef, pSample, MaxRAMPos, !RAMLoop) < 0) {          return ii;
132                  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"));  
         }  
133    
134        double Voice::GetSampleAttenuation() {
135            return pRegion->SampleAttenuation;
136        }
137    
138          // calculate initial pitch value      double Voice::GetVelocityAttenuation(uint8_t MIDIKeyVelocity) {
139          {          return pRegion->GetVelocityAttenuation(MIDIKeyVelocity);
140              double pitchbasecents = pDimRgn->FineTune + (int) pEngine->ScaleTuning[MIDIKey % 12];      }
             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  
         }  
141    
142          Volume = pDimRgn->GetVelocityAttenuation(itNoteOnEvent->Param.Note.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::GetVelocityRelease(uint8_t MIDIKeyVelocity) {
143            return pRegion->GetVelocityRelease(MIDIKeyVelocity);
144        }
145    
146          // setup EG 1 (VCA EG)      void Voice::ProcessCCEvent(RTList<Event>::Iterator& itEvent) {
147          {          if (itEvent->Type == Event::type_control_change && itEvent->Param.CC.Controller) { // if (valid) MIDI control change event
148              // get current value of EG1 controller              if (pRegion->AttenuationController.type == ::gig::attenuation_ctrl_t::type_controlchange &&
149              double eg1controllervalue;                  itEvent->Param.CC.Controller == pRegion->AttenuationController.controller_number) {
150              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 = itNoteOnEvent->Param.Note.Velocity;  
                     break;  
                 case ::gig::eg1_ctrl_t::type_controlchange: // MIDI control change controller  
                     eg1controllervalue = pEngine->ControllerTable[pDimRgn->EG1Controller.controller_number];  
                     break;  
151              }              }
             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);  
152          }          }
153        }
154    
155        void Voice::ProcessChannelPressureEvent(RTList<Event>::Iterator& itEvent) {
156          // setup EG 2 (VCF Cutoff EG)          if (itEvent->Type == Event::type_channel_pressure) { // if (valid) MIDI channel pressure (aftertouch) event
157          {              if (pRegion->AttenuationController.type == ::gig::attenuation_ctrl_t::type_channelaftertouch) {
158              // get current value of EG2 controller                  CrossfadeSmoother.update(AbstractEngine::CrossfadeCurve[CrossfadeAttenuation(itEvent->Param.ChannelPressure.Value)]);
             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 = itNoteOnEvent->Param.Note.Velocity;  
                     break;  
                 case ::gig::eg2_ctrl_t::type_controlchange: // MIDI control change controller  
                     eg2controllervalue = pEngine->ControllerTable[pDimRgn->EG2Controller.controller_number];  
                     break;  
159              }              }
             if (pDimRgn->EG2ControllerInvert) eg2controllervalue = 127 - eg2controllervalue;  
   
             // calculate influence of EG2 controller on EG2's parameters (TODO: needs to be fine tuned)  
             double eg2attack  = (pDimRgn->EG2ControllerAttackInfluence)  ? 0.0001 * (double) (1 << pDimRgn->EG2ControllerAttackInfluence)  * eg2controllervalue : 0.0;  
             double eg2decay   = (pDimRgn->EG2ControllerDecayInfluence)   ? 0.0001 * (double) (1 << pDimRgn->EG2ControllerDecayInfluence)   * eg2controllervalue : 0.0;  
             double eg2release = (pDimRgn->EG2ControllerReleaseInfluence) ? 0.0001 * (double) (1 << pDimRgn->EG2ControllerReleaseInfluence) * eg2controllervalue : 0.0;  
   
             pEG2->Trigger(pDimRgn->EG2PreAttack,  
                           pDimRgn->EG2Attack + eg2attack,  
                           false,  
                           pSample->LoopStart,  
                           pDimRgn->EG2Decay1 + eg2decay,  
                           pDimRgn->EG2Decay2 + eg2decay,  
                           pDimRgn->EG2InfiniteSustain,  
                           pDimRgn->EG2Sustain,  
                           pDimRgn->EG2Release + eg2release,  
                           Delay);  
160          }          }
161        }
162    
163        void Voice::ProcessPolyphonicKeyPressureEvent(RTList<Event>::Iterator& itEvent) {
164            // Not used so far
165        }
166    
167          // setup EG 3 (VCO EG)      uint8_t Voice::MinCutoff() const {
168          {          // If there's a cutoff controller defined then VCFVelocityScale means
169            double eg3depth = RTMath::CentsToFreqRatio(pDimRgn->EG3Depth);          // "minimum cutoff". If there is no MIDI controller defined for cutoff
170            pEG3->Trigger(eg3depth, pDimRgn->EG3Attack, Delay);          // then VCFVelocityScale is already taken into account on libgig side
171          }          // instead by call to pRegion->GetVelocityCutoff(MIDIKeyVelocity).
172            return pRegion->VCFVelocityScale;
173        }
174    
175          // setup LFO 1 (VCA LFO)      // This is called on any cutoff controller changes, however not when the
176          {      // voice is triggered. So the initial cutoff value is retrieved by a call
177              uint16_t lfo1_internal_depth;      // to CalculateFinalCutoff() instead.
178              switch (pDimRgn->LFO1Controller) {      void Voice::ProcessCutoffEvent(RTList<Event>::Iterator& itEvent) {
179                  case ::gig::lfo1_ctrl_internal:          if (VCFCutoffCtrl.value == itEvent->Param.CC.Value) return;
180                      lfo1_internal_depth  = pDimRgn->LFO1InternalDepth;          float ccvalue = VCFCutoffCtrl.value = itEvent->Param.CC.Value;
                     pLFO1->ExtController = 0; // no external controller  
                     break;  
                 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);  
         }  
181    
182            // if the selected filter type is an official GigaStudio filter type
183            // then we preserve the original (no matter how odd) historical GSt
184            // behaviour identically; for our own filter types though we deviate to
185            // more meaningful behaviours where appropriate
186            const bool isGStFilter = isGStFilterType(pRegion->VCFType);
187    
188          // setup LFO 2 (VCF Cutoff LFO)          if (pRegion->VCFCutoffControllerInvert) ccvalue = 127 - ccvalue;
189          {          // interpret "minimum cutoff" not simply as hard limit, rather
190              uint16_t lfo2_internal_depth;          // restrain it to min_cutoff..127 range, but spanned / remapped over
191              switch (pDimRgn->LFO2Controller) {          // the entire controller range (0..127) to avoid a "dead" lower
192                  case ::gig::lfo2_ctrl_internal:          // controller zone (that is to avoid a certain CC value range where
193                      lfo2_internal_depth  = pDimRgn->LFO2InternalDepth;          // the controller would not change the cutoff frequency)
194                      pLFO2->ExtController = 0; // no external controller          ccvalue = MinCutoff() + (ccvalue / 127.f) * float(127 - MinCutoff());
                     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);  
         }  
195    
196            float cutoff = CutoffBase * ccvalue;
197            if (cutoff > 127.0f) cutoff = 127.0f;
198    
199          // setup LFO 3 (VCO LFO)          // the filter implementations of the original GSt filter types take an
200          {          // abstract cutoff parameter range of 0..127, whereas our own filter
201              uint16_t lfo3_internal_depth;          // types take a cutoff parameter in Hz, so remap here:
202              switch (pDimRgn->LFO3Controller) {          // 0 .. 127 [lin] -> 21 Hz .. 18 kHz [x^4] (center @2.2 kHz)
203                  case ::gig::lfo3_ctrl_internal:          if (!isGStFilter) {
204                      lfo3_internal_depth  = pDimRgn->LFO3InternalDepth;              cutoff = (cutoff + 29.f) / (127.f + 29.f);
205                      pLFO3->ExtController = 0; // no external controller              cutoff = cutoff * cutoff * cutoff * cutoff * 18000.f;
206                      break;              if (cutoff > 0.49f * pEngine->SampleRate)
207                  case ::gig::lfo3_ctrl_modwheel:                  cutoff = 0.49f * pEngine->SampleRate;
                     lfo3_internal_depth  = 0;  
                     pLFO3->ExtController = 1; // MIDI controller 1  
                     break;  
                 case ::gig::lfo3_ctrl_aftertouch:  
                     lfo3_internal_depth  = 0;  
                     pLFO3->ExtController = 0; // TODO: aftertouch not implemented yet  
                     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    
210            fFinalCutoff = VCFCutoffCtrl.fvalue = cutoff;
211        }
212    
213          #if FORCE_FILTER_USAGE      double Voice::CalculateCrossfadeVolume(uint8_t MIDIKeyVelocity) {
214          SYNTHESIS_MODE_SET_FILTER(SynthesisMode, true);          float crossfadeVolume;
215          #else // use filter only if instrument file told so          switch (pRegion->AttenuationController.type) {
216          SYNTHESIS_MODE_SET_FILTER(SynthesisMode, pDimRgn->VCFEnabled);              case ::gig::attenuation_ctrl_t::type_channelaftertouch:
217          #endif // FORCE_FILTER_USAGE                  crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(GetGigEngineChannel()->ControllerTable[128])];
218          if (pDimRgn->VCFEnabled) {                  break;
219              #ifdef OVERRIDE_FILTER_CUTOFF_CTRL              case ::gig::attenuation_ctrl_t::type_velocity:
220              VCFCutoffCtrl.controller = OVERRIDE_FILTER_CUTOFF_CTRL;                  crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(MIDIKeyVelocity)];
221              #else // use the one defined in the instrument file                  break;
222              switch (pDimRgn->VCFCutoffController) {              case ::gig::attenuation_ctrl_t::type_controlchange: //FIXME: currently not sample accurate
223                  case ::gig::vcf_cutoff_ctrl_modwheel:                  crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(GetGigEngineChannel()->ControllerTable[pRegion->AttenuationController.controller_number])];
224                      VCFCutoffCtrl.controller = 1;                  break;
225                      break;              case ::gig::attenuation_ctrl_t::type_none: // no crossfade defined
226                  case ::gig::vcf_cutoff_ctrl_effect1:              default:
227                      VCFCutoffCtrl.controller = 12;                  crossfadeVolume = 1.0f;
                     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 - itNoteOnEvent->Param.Note.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) (itNoteOnEvent->Param.Note.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;  
   
             FilterUpdateCounter = -1;  
         }  
         else {  
             VCFCutoffCtrl.controller    = 0;  
             VCFResonanceCtrl.controller = 0;  
228          }          }
229    
230          return 0; // success          return crossfadeVolume;
231      }      }
232    
233      /**      double Voice::GetEG1ControllerValue(uint8_t MIDIKeyVelocity) {
234       *  Renders the audio data for this voice for the current audio fragment.          double eg1controllervalue = 0;
235       *  The sample input data can either come from RAM (cached sample or sample          switch (pRegion->EG1Controller.type) {
236       *  part) or directly from disk. The output signal will be rendered by              case ::gig::eg1_ctrl_t::type_none: // no controller defined
237       *  resampling / interpolation. If this voice is a disk streaming voice and                  eg1controllervalue = 0;
238       *  the voice completely played back the cached RAM part of the sample, it                  break;
239       *  will automatically switch to disk playback for the next RenderAudio()              case ::gig::eg1_ctrl_t::type_channelaftertouch:
240       *  call.                  eg1controllervalue = GetGigEngineChannel()->ControllerTable[128];
241       *                  break;
242       *  @param Samples - number of samples to be rendered in this audio fragment cycle              case ::gig::eg1_ctrl_t::type_velocity:
243       */                  eg1controllervalue = MIDIKeyVelocity;
244      void Voice::Render(uint Samples) {                  break;
245                case ::gig::eg1_ctrl_t::type_controlchange: // MIDI control change controller
246          // select default values for synthesis mode bits                  eg1controllervalue = GetGigEngineChannel()->ControllerTable[pRegion->EG1Controller.controller_number];
247          SYNTHESIS_MODE_SET_INTERPOLATE(SynthesisMode, (PitchBase * PitchBend) != 1.0f);                  break;
         SYNTHESIS_MODE_SET_CONSTPITCH(SynthesisMode, true);  
         SYNTHESIS_MODE_SET_LOOP(SynthesisMode, false);  
   
         // Reset the synthesis parameter matrix  
   
         pEngine->ResetSynthesisParameters(Event::destination_vca, this->Volume * this->CrossfadeVolume * pEngine->GlobalVolume);  
         pEngine->ResetSynthesisParameters(Event::destination_vco, this->PitchBase);  
         pEngine->ResetSynthesisParameters(Event::destination_vcfc, VCFCutoffCtrl.fvalue);  
         pEngine->ResetSynthesisParameters(Event::destination_vcfr, VCFResonanceCtrl.fvalue);  
   
         // 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, itTriggerEvent, this->Pos, this->PitchBase * this->PitchBend, itKillEvent);  
         pEG2->Process(Samples, pEngine->pMIDIKeyInfo[MIDIKey].pEvents, itTriggerEvent, this->Pos, this->PitchBase * this->PitchBend);  
         if (pEG3->Process(Samples)) { // if pitch EG is active  
             SYNTHESIS_MODE_SET_INTERPOLATE(SynthesisMode, true);  
             SYNTHESIS_MODE_SET_CONSTPITCH(SynthesisMode, false);  
         }  
         pLFO1->Process(Samples);  
         pLFO2->Process(Samples);  
         if (pLFO3->Process(Samples)) { // if pitch LFO modulation is active  
             SYNTHESIS_MODE_SET_INTERPOLATE(SynthesisMode, true);  
             SYNTHESIS_MODE_SET_CONSTPITCH(SynthesisMode, false);  
248          }          }
249            if (pRegion->EG1ControllerInvert) eg1controllervalue = 127 - eg1controllervalue;
250    
251          if (SYNTHESIS_MODE_GET_FILTER(SynthesisMode))          return eg1controllervalue;
252                  CalculateBiquadParameters(Samples); // calculate the final biquad filter parameters      }
   
         switch (this->PlaybackState) {  
   
             case playback_state_ram: {  
                     if (RAMLoop) SYNTHESIS_MODE_SET_LOOP(SynthesisMode, true); // enable looping  
253    
254                      // render current fragment      Voice::EGInfo Voice::CalculateEG1ControllerInfluence(double eg1ControllerValue) {
255                      Synthesize(Samples, (sample_t*) pSample->GetCache().pStart, Delay);          EGInfo eg;
256            // (eg1attack is different from the others)
257                      if (DiskVoice) {          if (pRegion->EG1Attack < 1e-8 && // attack in gig == 0
258                          // check if we reached the allowed limit of the sample RAM cache              (pRegion->EG1ControllerAttackInfluence == 0 ||
259                          if (Pos > MaxRAMPos) {               eg1ControllerValue <= 10)) { // strange GSt special case
260                              dmsg(5,("Voice: switching to disk playback (Pos=%f)\n", Pos));              eg.Attack = 0; // this will force the attack to be 0 in the call to EG1.trigger
261                              this->PlaybackState = playback_state_disk;          } else {
262                          }              eg.Attack  = (pRegion->EG1ControllerAttackInfluence)  ?
263                      }                  1 + 0.031 * (double) (pRegion->EG1ControllerAttackInfluence == 1 ?
264                      else if (Pos >= pSample->GetCache().Size / pSample->FrameSize) {                                        1 : 1 << pRegion->EG1ControllerAttackInfluence) * eg1ControllerValue : 1.0;
265                          this->PlaybackState = playback_state_end;          }
266                      }          eg.Decay   = (pRegion->EG1ControllerDecayInfluence)   ? 1 + 0.00775 * (double) (1 << pRegion->EG1ControllerDecayInfluence)   * eg1ControllerValue : 1.0;
267                  }          eg.Release = (pRegion->EG1ControllerReleaseInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG1ControllerReleaseInfluence) * eg1ControllerValue : 1.0;
268                  break;  
269            return eg;
270              case playback_state_disk: {      }
271                      if (!DiskStreamRef.pStream) {  
272                          // check if the disk thread created our ordered disk stream in the meantime      double Voice::GetEG2ControllerValue(uint8_t MIDIKeyVelocity) {
273                          DiskStreamRef.pStream = pDiskThread->AskForCreatedStream(DiskStreamRef.OrderID);          double eg2controllervalue = 0;
274                          if (!DiskStreamRef.pStream) {          switch (pRegion->EG2Controller.type) {
275                              std::cout << stderr << "Disk stream not available in time!" << std::endl << std::flush;              case ::gig::eg2_ctrl_t::type_none: // no controller defined
276                              KillImmediately();                  eg2controllervalue = 0;
                             return;  
                         }  
                         DiskStreamRef.pStream->IncrementReadPos(pSample->Channels * (int(Pos) - MaxRAMPos));  
                         Pos -= int(Pos);  
                         RealSampleWordsLeftToRead = -1; // -1 means no silence has been added yet  
                     }  
   
                     const int sampleWordsLeftToRead = DiskStreamRef.pStream->GetReadSpace();  
   
                     // add silence sample at the end if we reached the end of the stream (for the interpolator)  
                     if (DiskStreamRef.State == Stream::state_end) {  
                         const int maxSampleWordsPerCycle = (pEngine->MaxSamplesPerCycle << MAX_PITCH) * pSample->Channels + 6; // +6 for the interpolator algorithm  
                         if (sampleWordsLeftToRead <= maxSampleWordsPerCycle) {  
                             // remember how many sample words there are before any silence has been added  
                             if (RealSampleWordsLeftToRead < 0) RealSampleWordsLeftToRead = sampleWordsLeftToRead;  
                             DiskStreamRef.pStream->WriteSilence(maxSampleWordsPerCycle - sampleWordsLeftToRead);  
                         }  
                     }  
   
                     sample_t* ptr = DiskStreamRef.pStream->GetReadPtr(); // get the current read_ptr within the ringbuffer where we read the samples from  
   
                     // render current audio fragment  
                     Synthesize(Samples, ptr, Delay);  
   
                     const int iPos = (int) Pos;  
                     const int readSampleWords = iPos * pSample->Channels; // amount of sample words actually been read  
                     DiskStreamRef.pStream->IncrementReadPos(readSampleWords);  
                     Pos -= iPos; // just keep fractional part of Pos  
   
                     // change state of voice to 'end' if we really reached the end of the sample data  
                     if (RealSampleWordsLeftToRead >= 0) {  
                         RealSampleWordsLeftToRead -= readSampleWords;  
                         if (RealSampleWordsLeftToRead <= 0) this->PlaybackState = playback_state_end;  
                     }  
                 }  
277                  break;                  break;
278                case ::gig::eg2_ctrl_t::type_channelaftertouch:
279              case playback_state_end:                  eg2controllervalue = GetGigEngineChannel()->ControllerTable[128];
280                  std::cerr << "gig::Voice::Render(): entered with playback_state_end, this is a bug!\n" << std::flush;                  break;
281                case ::gig::eg2_ctrl_t::type_velocity:
282                    eg2controllervalue = MIDIKeyVelocity;
283                    break;
284                case ::gig::eg2_ctrl_t::type_controlchange: // MIDI control change controller
285                    eg2controllervalue = GetGigEngineChannel()->ControllerTable[pRegion->EG2Controller.controller_number];
286                  break;                  break;
287          }          }
288            if (pRegion->EG2ControllerInvert) eg2controllervalue = 127 - eg2controllervalue;
289    
290          // Reset synthesis event lists (except VCO, as VCO events apply channel wide currently)          return eg2controllervalue;
291          pEngine->pSynthesisEvents[Event::destination_vca]->clear();      }
         pEngine->pSynthesisEvents[Event::destination_vcfc]->clear();  
         pEngine->pSynthesisEvents[Event::destination_vcfr]->clear();  
   
         // Reset delay  
         Delay = 0;  
   
         itTriggerEvent = Pool<Event>::Iterator();  
   
         // If sample stream or release stage finished, kill the voice  
         if (PlaybackState == playback_state_end || pEG1->GetStage() == EGADSR::stage_end) KillImmediately();  
     }  
   
     /**  
      *  Resets voice variables. Should only be called if rendering process is  
      *  suspended / not running.  
      */  
     void Voice::Reset() {  
         pLFO1->Reset();  
         pLFO2->Reset();  
         pLFO3->Reset();  
         FilterLeft.Reset();  
         FilterRight.Reset();  
         DiskStreamRef.pStream = NULL;  
         DiskStreamRef.hStream = 0;  
         DiskStreamRef.State   = Stream::state_unused;  
         DiskStreamRef.OrderID = 0;  
         PlaybackState = playback_state_end;  
         itTriggerEvent = Pool<Event>::Iterator();  
         itKillEvent    = Pool<Event>::Iterator();  
     }  
   
     /**  
      *  Process the control change event lists of the engine for the current  
      *  audio fragment. Event values will be applied to the synthesis parameter  
      *  matrix.  
      *  
      *  @param Samples - number of samples to be rendered in this audio fragment cycle  
      */  
     void Voice::ProcessEvents(uint Samples) {  
   
         // dispatch control change events  
         RTList<Event>::Iterator itCCEvent = pEngine->pCCEvents->first();  
         if (Delay) { // skip events that happened before this voice was triggered  
             while (itCCEvent && itCCEvent->FragmentPos() <= Delay) ++itCCEvent;  
         }  
         while (itCCEvent) {  
             if (itCCEvent->Param.CC.Controller) { // if valid MIDI controller  
                 if (itCCEvent->Param.CC.Controller == VCFCutoffCtrl.controller) {  
                     *pEngine->pSynthesisEvents[Event::destination_vcfc]->allocAppend() = *itCCEvent;  
                 }  
                 if (itCCEvent->Param.CC.Controller == VCFResonanceCtrl.controller) {  
                     *pEngine->pSynthesisEvents[Event::destination_vcfr]->allocAppend() = *itCCEvent;  
                 }  
                 if (itCCEvent->Param.CC.Controller == pLFO1->ExtController) {  
                     pLFO1->SendEvent(itCCEvent);  
                 }  
                 if (itCCEvent->Param.CC.Controller == pLFO2->ExtController) {  
                     pLFO2->SendEvent(itCCEvent);  
                 }  
                 if (itCCEvent->Param.CC.Controller == pLFO3->ExtController) {  
                     pLFO3->SendEvent(itCCEvent);  
                 }  
                 if (pDimRgn->AttenuationController.type == ::gig::attenuation_ctrl_t::type_controlchange &&  
                     itCCEvent->Param.CC.Controller == pDimRgn->AttenuationController.controller_number) { // if crossfade event  
                     *pEngine->pSynthesisEvents[Event::destination_vca]->allocAppend() = *itCCEvent;  
                 }  
             }  
   
             ++itCCEvent;  
         }  
292    
293        Voice::EGInfo Voice::CalculateEG2ControllerInfluence(double eg2ControllerValue) {
294            EGInfo eg;
295            eg.Attack  = (pRegion->EG2ControllerAttackInfluence)  ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerAttackInfluence)  * eg2ControllerValue : 1.0;
296            eg.Decay   = (pRegion->EG2ControllerDecayInfluence)   ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerDecayInfluence)   * eg2ControllerValue : 1.0;
297            eg.Release = (pRegion->EG2ControllerReleaseInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerReleaseInfluence) * eg2ControllerValue : 1.0;
298    
299          // process pitch events          return eg;
300          {      }
             RTList<Event>* pVCOEventList = pEngine->pSynthesisEvents[Event::destination_vco];  
             RTList<Event>::Iterator itVCOEvent = pVCOEventList->first();  
             if (Delay) { // skip events that happened before this voice was triggered  
                 while (itVCOEvent && itVCOEvent->FragmentPos() <= Delay) ++itVCOEvent;  
             }  
             // apply old pitchbend value until first pitch event occurs  
             if (this->PitchBend != 1.0) {  
                 uint end = (itVCOEvent) ? itVCOEvent->FragmentPos() : Samples;  
                 for (uint i = Delay; i < end; i++) {  
                     pEngine->pSynthesisParameters[Event::destination_vco][i] *= this->PitchBend;  
                 }  
             }  
             float pitch;  
             while (itVCOEvent) {  
                 RTList<Event>::Iterator itNextVCOEvent = itVCOEvent;  
                 ++itNextVCOEvent;  
   
                 // calculate the influence length of this event (in sample points)  
                 uint end = (itNextVCOEvent) ? itNextVCOEvent->FragmentPos() : Samples;  
   
                 pitch = RTMath::CentsToFreqRatio(((double) itVCOEvent->Param.Pitch.Pitch / 8192.0) * 200.0); // +-two semitones = +-200 cents  
   
                 // apply pitch value to the pitch parameter sequence  
                 for (uint i = itVCOEvent->FragmentPos(); i < end; i++) {  
                     pEngine->pSynthesisParameters[Event::destination_vco][i] *= pitch;  
                 }  
301    
302                  itVCOEvent = itNextVCOEvent;      void Voice::InitLFO1() {
303              }          uint16_t lfo1_internal_depth;
304              if (!pVCOEventList->isEmpty()) {          switch (pRegion->LFO1Controller) {
305                  this->PitchBend = pitch;              case ::gig::lfo1_ctrl_internal:
306                  SYNTHESIS_MODE_SET_INTERPOLATE(SynthesisMode, true);                  lfo1_internal_depth  = pRegion->LFO1InternalDepth;
307                  SYNTHESIS_MODE_SET_CONSTPITCH(SynthesisMode, false);                  pLFO1->ExtController = 0; // no external controller
308              }                  bLFO1Enabled         = (lfo1_internal_depth > 0);
309                    break;
310                case ::gig::lfo1_ctrl_modwheel:
311                    lfo1_internal_depth  = 0;
312                    pLFO1->ExtController = 1; // MIDI controller 1
313                    bLFO1Enabled         = (pRegion->LFO1ControlDepth > 0);
314                    break;
315                case ::gig::lfo1_ctrl_breath:
316                    lfo1_internal_depth  = 0;
317                    pLFO1->ExtController = 2; // MIDI controller 2
318                    bLFO1Enabled         = (pRegion->LFO1ControlDepth > 0);
319                    break;
320                case ::gig::lfo1_ctrl_internal_modwheel:
321                    lfo1_internal_depth  = pRegion->LFO1InternalDepth;
322                    pLFO1->ExtController = 1; // MIDI controller 1
323                    bLFO1Enabled         = (lfo1_internal_depth > 0 || pRegion->LFO1ControlDepth > 0);
324                    break;
325                case ::gig::lfo1_ctrl_internal_breath:
326                    lfo1_internal_depth  = pRegion->LFO1InternalDepth;
327                    pLFO1->ExtController = 2; // MIDI controller 2
328                    bLFO1Enabled         = (lfo1_internal_depth > 0 || pRegion->LFO1ControlDepth > 0);
329                    break;
330                default:
331                    lfo1_internal_depth  = 0;
332                    pLFO1->ExtController = 0; // no external controller
333                    bLFO1Enabled         = false;
334            }
335            if (bLFO1Enabled) {
336                pLFO1->trigger(fromGigLfoWave(pRegion->LFO1WaveForm),
337                               pRegion->LFO1Frequency,
338                               pRegion->LFO1Phase,
339                               LFO::start_level_mid, // see https://sourceforge.net/p/linuxsampler/mailman/linuxsampler-devel/thread/2189307.cNP0Xbctxq%40silver/#msg36774029
340                               lfo1_internal_depth,
341                               pRegion->LFO1ControlDepth,
342                               pRegion->LFO1FlipPhase,
343                               pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
344                pLFO1->updateByMIDICtrlValue(pLFO1->ExtController ? GetGigEngineChannel()->ControllerTable[pLFO1->ExtController] : 0);
345                pLFO1->setScriptDepthFactor(
346                    pNote->Override.AmpLFODepth.Value,
347                    pNote->Override.AmpLFODepth.Final
348                );
349                if (pNote->Override.AmpLFOFreq.isFinal())
350                    pLFO1->setScriptFrequencyFinal(
351                        pNote->Override.AmpLFOFreq.Value, pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE
352                    );
353                else
354                    pLFO1->setScriptFrequencyFactor(
355                        pNote->Override.AmpLFOFreq.Value, pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE
356                    );
357          }          }
358        }
359    
360          // process volume / attenuation events (TODO: we only handle and _expect_ crossfade events here ATM !)      void Voice::InitLFO2() {
361          {          uint16_t lfo2_internal_depth;
362              RTList<Event>* pVCAEventList = pEngine->pSynthesisEvents[Event::destination_vca];          switch (pRegion->LFO2Controller) {
363              RTList<Event>::Iterator itVCAEvent = pVCAEventList->first();              case ::gig::lfo2_ctrl_internal:
364              if (Delay) { // skip events that happened before this voice was triggered                  lfo2_internal_depth  = pRegion->LFO2InternalDepth;
365                  while (itVCAEvent && itVCAEvent->FragmentPos() <= Delay) ++itVCAEvent;                  pLFO2->ExtController = 0; // no external controller
366              }                  bLFO2Enabled         = (lfo2_internal_depth > 0);
367              float crossfadevolume;                  break;
368              while (itVCAEvent) {              case ::gig::lfo2_ctrl_modwheel:
369                  RTList<Event>::Iterator itNextVCAEvent = itVCAEvent;                  lfo2_internal_depth  = 0;
370                  ++itNextVCAEvent;                  pLFO2->ExtController = 1; // MIDI controller 1
371                    bLFO2Enabled         = (pRegion->LFO2ControlDepth > 0);
372                  // calculate the influence length of this event (in sample points)                  break;
373                  uint end = (itNextVCAEvent) ? itNextVCAEvent->FragmentPos() : Samples;              case ::gig::lfo2_ctrl_foot:
374                    lfo2_internal_depth  = 0;
375                  crossfadevolume = CrossfadeAttenuation(itVCAEvent->Param.CC.Value);                  pLFO2->ExtController = 4; // MIDI controller 4
376                    bLFO2Enabled         = (pRegion->LFO2ControlDepth > 0);
377                  float effective_volume = crossfadevolume * this->Volume * pEngine->GlobalVolume;                  break;
378                case ::gig::lfo2_ctrl_internal_modwheel:
379                  // apply volume value to the volume parameter sequence                  lfo2_internal_depth  = pRegion->LFO2InternalDepth;
380                  for (uint i = itVCAEvent->FragmentPos(); i < end; i++) {                  pLFO2->ExtController = 1; // MIDI controller 1
381                      pEngine->pSynthesisParameters[Event::destination_vca][i] = effective_volume;                  bLFO2Enabled         = (lfo2_internal_depth > 0 || pRegion->LFO2ControlDepth > 0);
382                  }                  break;
383                case ::gig::lfo2_ctrl_internal_foot:
384                  itVCAEvent = itNextVCAEvent;                  lfo2_internal_depth  = pRegion->LFO2InternalDepth;
385              }                  pLFO2->ExtController = 4; // MIDI controller 4
386              if (!pVCAEventList->isEmpty()) this->CrossfadeVolume = crossfadevolume;                  bLFO2Enabled         = (lfo2_internal_depth > 0 || pRegion->LFO2ControlDepth > 0);
387                    break;
388                default:
389                    lfo2_internal_depth  = 0;
390                    pLFO2->ExtController = 0; // no external controller
391                    bLFO2Enabled         = false;
392            }
393            if (bLFO2Enabled) {
394                pLFO2->trigger(fromGigLfoWave(pRegion->LFO2WaveForm),
395                               pRegion->LFO2Frequency,
396                               pRegion->LFO2Phase,
397                               LFO::start_level_mid, // see https://sourceforge.net/p/linuxsampler/mailman/linuxsampler-devel/thread/2189307.cNP0Xbctxq%40silver/#msg36774029
398                               lfo2_internal_depth,
399                               pRegion->LFO2ControlDepth,
400                               pRegion->LFO2FlipPhase,
401                               pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
402                pLFO2->updateByMIDICtrlValue(pLFO2->ExtController ? GetGigEngineChannel()->ControllerTable[pLFO2->ExtController] : 0);
403                pLFO2->setScriptDepthFactor(
404                    pNote->Override.CutoffLFODepth.Value,
405                    pNote->Override.CutoffLFODepth.Final
406                );
407                if (pNote->Override.CutoffLFOFreq.isFinal())
408                    pLFO2->setScriptFrequencyFinal(pNote->Override.CutoffLFOFreq.Value, pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
409                else
410                    pLFO2->setScriptFrequencyFactor(pNote->Override.CutoffLFOFreq.Value, pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
411          }          }
412        }
413    
414          // process filter cutoff events      void Voice::InitLFO3() {
415          {          uint16_t lfo3_internal_depth;
416              RTList<Event>* pCutoffEventList = pEngine->pSynthesisEvents[Event::destination_vcfc];          switch (pRegion->LFO3Controller) {
417              RTList<Event>::Iterator itCutoffEvent = pCutoffEventList->first();              case ::gig::lfo3_ctrl_internal:
418              if (Delay) { // skip events that happened before this voice was triggered                  lfo3_internal_depth  = pRegion->LFO3InternalDepth;
419                  while (itCutoffEvent && itCutoffEvent->FragmentPos() <= Delay) ++itCutoffEvent;                  pLFO3->ExtController = 0; // no external controller
420              }                  bLFO3Enabled         = (lfo3_internal_depth > 0);
421              float cutoff;                  break;
422              while (itCutoffEvent) {              case ::gig::lfo3_ctrl_modwheel:
423                  RTList<Event>::Iterator itNextCutoffEvent = itCutoffEvent;                  lfo3_internal_depth  = 0;
424                  ++itNextCutoffEvent;                  pLFO3->ExtController = 1; // MIDI controller 1
425                    bLFO3Enabled         = (pRegion->LFO3ControlDepth > 0);
426                  // calculate the influence length of this event (in sample points)                  break;
427                  uint end = (itNextCutoffEvent) ? itNextCutoffEvent->FragmentPos() : Samples;              case ::gig::lfo3_ctrl_aftertouch:
428                    lfo3_internal_depth  = 0;
429                  cutoff = exp((float) itCutoffEvent->Param.CC.Value * 0.00787402f * FILTER_CUTOFF_COEFF) * FILTER_CUTOFF_MAX - FILTER_CUTOFF_MIN;                  pLFO3->ExtController = CTRL_TABLE_IDX_AFTERTOUCH;
430                    bLFO3Enabled         = true;
431                  // apply cutoff frequency to the cutoff parameter sequence                  break;
432                  for (uint i = itCutoffEvent->FragmentPos(); i < end; i++) {              case ::gig::lfo3_ctrl_internal_modwheel:
433                      pEngine->pSynthesisParameters[Event::destination_vcfc][i] = cutoff;                  lfo3_internal_depth  = pRegion->LFO3InternalDepth;
434                  }                  pLFO3->ExtController = 1; // MIDI controller 1
435                    bLFO3Enabled         = (lfo3_internal_depth > 0 || pRegion->LFO3ControlDepth > 0);
436                  itCutoffEvent = itNextCutoffEvent;                  break;
437              }              case ::gig::lfo3_ctrl_internal_aftertouch:
438              if (!pCutoffEventList->isEmpty()) VCFCutoffCtrl.fvalue = cutoff; // needed for initialization of parameter matrix next time                  lfo3_internal_depth  = pRegion->LFO3InternalDepth;
439                    pLFO3->ExtController = CTRL_TABLE_IDX_AFTERTOUCH;
440                    bLFO3Enabled         = (lfo3_internal_depth > 0 || pRegion->LFO3ControlDepth > 0);
441                    break;
442                default:
443                    lfo3_internal_depth  = 0;
444                    pLFO3->ExtController = 0; // no external controller
445                    bLFO3Enabled         = false;
446            }
447            if (bLFO3Enabled) {
448                pLFO3->trigger(fromGigLfoWave(pRegion->LFO3WaveForm),
449                               pRegion->LFO3Frequency,
450                               pRegion->LFO3Phase,
451                               LFO::start_level_max, // see https://sourceforge.net/p/linuxsampler/mailman/linuxsampler-devel/thread/2189307.cNP0Xbctxq%40silver/#msg36774029
452                               lfo3_internal_depth,
453                               pRegion->LFO3ControlDepth,
454                               pRegion->LFO3FlipPhase,
455                               pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
456                pLFO3->updateByMIDICtrlValue(pLFO3->ExtController ? GetGigEngineChannel()->ControllerTable[pLFO3->ExtController] : 0);
457                pLFO3->setScriptDepthFactor(
458                    pNote->Override.PitchLFODepth.Value,
459                    pNote->Override.PitchLFODepth.Final
460                );
461                if (pNote->Override.PitchLFOFreq.isFinal())
462                    pLFO3->setScriptFrequencyFinal(pNote->Override.PitchLFOFreq.Value, pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
463                else
464                    pLFO3->setScriptFrequencyFactor(pNote->Override.PitchLFOFreq.Value, pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
465            }
466        }
467    
468        float Voice::CalculateCutoffBase(uint8_t MIDIKeyVelocity) {
469            float cutoff = pRegion->GetVelocityCutoff(MIDIKeyVelocity);
470            if (pRegion->VCFKeyboardTracking) {
471                cutoff *= RTMath::CentsToFreqRatioUnlimited((MIDIKey() - pRegion->VCFKeyboardTrackingBreakpoint) * 100);
472            }
473            return cutoff;
474        }
475    
476        // This is just called when the voice is triggered. On any subsequent cutoff
477        // controller changes ProcessCutoffEvent() is called instead.
478        float Voice::CalculateFinalCutoff(float cutoffBase) {
479            // if the selected filter type is an official GigaStudio filter type
480            // then we preserve the original (no matter how odd) historical GSt
481            // behaviour identically; for our own filter types though we deviate to
482            // more meaningful behaviours where appropriate
483            const bool isGStFilter = isGStFilterType(pRegion->VCFType);
484    
485            // get current cutoff CC or velocity value (always 0..127)
486            float cvalue;
487            if (VCFCutoffCtrl.controller) {
488                cvalue = GetGigEngineChannel()->ControllerTable[VCFCutoffCtrl.controller];
489                if (pRegion->VCFCutoffControllerInvert) cvalue = 127 - cvalue;
490                if (isGStFilter) {
491                    // VCFVelocityScale in this case means "minimum cutoff" for GSt
492                    if (cvalue < MinCutoff()) cvalue = MinCutoff();
493                } else {
494                    // for our own filter types we interpret "minimum cutoff"
495                    // differently: GSt handles this as a simple hard limit with the
496                    // consequence that a certain range of the controller is simply
497                    // dead; so for our filter types we rather remap that to
498                    // restrain within the min_cutoff..127 range as well, but
499                    // effectively spanned over the entire controller range (0..127)
500                    // to avoid such a "dead" lower controller zone
501                    cvalue = MinCutoff() + (cvalue / 127.f) * float(127 - MinCutoff());
502                }
503            } else {
504                // in case of velocity, VCFVelocityScale parameter is already
505                // handled on libgig side (so by calling
506                // pRegion->GetVelocityCutoff(velo) in CalculateCutoffBase() above)
507                cvalue = pRegion->VCFCutoff;
508            }
509    
510            float fco = cutoffBase * cvalue;
511            if (fco > 127.0f) fco = 127.0f;
512    
513            // the filter implementations of the original GSt filter types take an
514            // abstract cutoff parameter range of 0..127, ...
515            if (isGStFilter)
516                return fco;
517    
518            // ... whereas our own filter types take a cutoff parameter in Hz, so
519            // remap here 0 .. 127 [lin] -> 21 Hz .. 18 kHz [x^4] (center @2.2 kHz)
520            fco = (fco + 29.f) / (127.f + 29.f);
521            fco = fco * fco * fco * fco * 18000.f;
522            if (fco > 0.49f * pEngine->SampleRate)
523                fco = 0.49f * pEngine->SampleRate;
524            return fco;
525        }
526    
527        uint8_t Voice::GetVCFCutoffCtrl() {
528            uint8_t ctrl;
529            switch (pRegion->VCFCutoffController) {
530                case ::gig::vcf_cutoff_ctrl_modwheel:
531                    ctrl = 1;
532                    break;
533                case ::gig::vcf_cutoff_ctrl_effect1:
534                    ctrl = 12;
535                    break;
536                case ::gig::vcf_cutoff_ctrl_effect2:
537                    ctrl = 13;
538                    break;
539                case ::gig::vcf_cutoff_ctrl_breath:
540                    ctrl = 2;
541                    break;
542                case ::gig::vcf_cutoff_ctrl_foot:
543                    ctrl = 4;
544                    break;
545                case ::gig::vcf_cutoff_ctrl_sustainpedal:
546                    ctrl = 64;
547                    break;
548                case ::gig::vcf_cutoff_ctrl_softpedal:
549                    ctrl = 67;
550                    break;
551                case ::gig::vcf_cutoff_ctrl_genpurpose7:
552                    ctrl = 82;
553                    break;
554                case ::gig::vcf_cutoff_ctrl_genpurpose8:
555                    ctrl = 83;
556                    break;
557                case ::gig::vcf_cutoff_ctrl_aftertouch:
558                    ctrl = CTRL_TABLE_IDX_AFTERTOUCH;
559                    break;
560                case ::gig::vcf_cutoff_ctrl_none:
561                default:
562                    ctrl = 0;
563                    break;
564          }          }
565    
566          // process filter resonance events          return ctrl;
         {  
             RTList<Event>* pResonanceEventList = pEngine->pSynthesisEvents[Event::destination_vcfr];  
             RTList<Event>::Iterator itResonanceEvent = pResonanceEventList->first();  
             if (Delay) { // skip events that happened before this voice was triggered  
                 while (itResonanceEvent && itResonanceEvent->FragmentPos() <= Delay) ++itResonanceEvent;  
             }  
             while (itResonanceEvent) {  
                 RTList<Event>::Iterator itNextResonanceEvent = itResonanceEvent;  
                 ++itNextResonanceEvent;  
   
                 // calculate the influence length of this event (in sample points)  
                 uint end = (itNextResonanceEvent) ? itNextResonanceEvent->FragmentPos() : Samples;  
   
                 // convert absolute controller value to differential  
                 int ctrldelta = itResonanceEvent->Param.CC.Value - VCFResonanceCtrl.value;  
                 VCFResonanceCtrl.value = itResonanceEvent->Param.CC.Value;  
   
                 float resonancedelta = (float) ctrldelta * 0.00787f; // 0.0..1.0  
   
                 // apply cutoff frequency to the cutoff parameter sequence  
                 for (uint i = itResonanceEvent->FragmentPos(); i < end; i++) {  
                     pEngine->pSynthesisParameters[Event::destination_vcfr][i] += resonancedelta;  
                 }  
   
                 itResonanceEvent = itNextResonanceEvent;  
             }  
             if (!pResonanceEventList->isEmpty()) VCFResonanceCtrl.fvalue = pResonanceEventList->last()->Param.CC.Value * 0.00787f; // needed for initialization of parameter matrix next time  
         }  
567      }      }
568    
569      /**      uint8_t Voice::GetVCFResonanceCtrl() {
570       * Calculate all necessary, final biquad filter parameters.          uint8_t ctrl;
571       *          switch (pRegion->VCFResonanceController) {
572       * @param Samples - number of samples to be rendered in this audio fragment cycle              case ::gig::vcf_res_ctrl_genpurpose3:
573       */                  ctrl = 18;
574      void Voice::CalculateBiquadParameters(uint Samples) {                  break;
575          biquad_param_t bqbase;              case ::gig::vcf_res_ctrl_genpurpose4:
576          biquad_param_t bqmain;                  ctrl = 19;
577          float prev_cutoff = pEngine->pSynthesisParameters[Event::destination_vcfc][0];                  break;
578          float prev_res    = pEngine->pSynthesisParameters[Event::destination_vcfr][0];              case ::gig::vcf_res_ctrl_genpurpose5:
579          FilterLeft.SetParameters(&bqbase, &bqmain, prev_cutoff, prev_res, pEngine->SampleRate);                  ctrl = 80;
580          FilterRight.SetParameters(&bqbase, &bqmain, prev_cutoff, prev_res, pEngine->SampleRate);                  break;
581          pEngine->pBasicFilterParameters[0] = bqbase;              case ::gig::vcf_res_ctrl_genpurpose6:
582          pEngine->pMainFilterParameters[0]  = bqmain;                  ctrl = 81;
583                    break;
584          float* bq;              case ::gig::vcf_res_ctrl_none:
585          for (int i = 1; i < Samples; i++) {              default:
586              // recalculate biquad parameters if cutoff or resonance differ from previous sample point                  ctrl = 0;
             if (!(i & FILTER_UPDATE_MASK)) {  
                 if (pEngine->pSynthesisParameters[Event::destination_vcfr][i] != prev_res ||  
                     pEngine->pSynthesisParameters[Event::destination_vcfc][i] != prev_cutoff)  
                 {  
                     prev_cutoff = pEngine->pSynthesisParameters[Event::destination_vcfc][i];  
                     prev_res    = pEngine->pSynthesisParameters[Event::destination_vcfr][i];  
                     FilterLeft.SetParameters(&bqbase, &bqmain, prev_cutoff, prev_res, pEngine->SampleRate);  
                     FilterRight.SetParameters(&bqbase, &bqmain, prev_cutoff, prev_res, pEngine->SampleRate);  
                 }  
             }  
   
             //same as 'pEngine->pBasicFilterParameters[i] = bqbase;'  
             bq    = (float*) &pEngine->pBasicFilterParameters[i];  
             bq[0] = bqbase.b0;  
             bq[1] = bqbase.b1;  
             bq[2] = bqbase.b2;  
             bq[3] = bqbase.a1;  
             bq[4] = bqbase.a2;  
   
             // same as 'pEngine->pMainFilterParameters[i] = bqmain;'  
             bq    = (float*) &pEngine->pMainFilterParameters[i];  
             bq[0] = bqmain.b0;  
             bq[1] = bqmain.b1;  
             bq[2] = bqmain.b2;  
             bq[3] = bqmain.a1;  
             bq[4] = bqmain.a2;  
587          }          }
     }  
588    
589      /**          return ctrl;
      *  Synthesizes the current audio fragment for this voice.  
      *  
      *  @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::Synthesize(uint Samples, sample_t* pSrc, uint Skip) {  
         RunSynthesisFunction(SynthesisMode, *this, Samples, pSrc, Skip);  
     }  
   
     /**  
      *  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();  
590      }      }
591    
592      /**      void Voice::TriggerEG1(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) {
593       *  Kill the voice in regular sense. Let the voice render audio until          EG1.setStateOptions(
594       *  the kill event actually occured and then fade down the volume level              pRegion->EG1Options.AttackCancel,
595       *  very quickly and let the voice die finally. Unlike a normal release              pRegion->EG1Options.AttackHoldCancel,
596       *  of a voice, a kill process cannot be cancalled and is therefore              pRegion->EG1Options.Decay1Cancel,
597       *  usually used for voice stealing and key group conflicts.              pRegion->EG1Options.Decay2Cancel,
598       *              pRegion->EG1Options.ReleaseCancel
599       *  @param itKillEvent - event which caused the voice to be killed          );
600       */          EG1.trigger(pRegion->EG1PreAttack,
601      void Voice::Kill(Pool<Event>::Iterator& itKillEvent) {                      (pNote && pNote->Override.Attack.isFinal()) ?
602          //FIXME: just two sanity checks for debugging, can be removed                          pNote->Override.Attack.Value :
603          if (!itKillEvent) dmsg(1,("gig::Voice::Kill(): ERROR, !itKillEvent !!!\n"));                          RTMath::Max(pRegion->EG1Attack, 0.0316) * egInfo.Attack,
604          if (itKillEvent && !itKillEvent.isValid()) dmsg(1,("gig::Voice::Kill(): ERROR, itKillEvent invalid !!!\n"));                      pRegion->EG1Hold,
605                        (pNote && pNote->Override.Decay.isFinal()) ?
606          if (itTriggerEvent && itKillEvent->FragmentPos() <= itTriggerEvent->FragmentPos()) return;                          pNote->Override.Decay.Value :
607          this->itKillEvent = itKillEvent;                          pRegion->EG1Decay1 * egInfo.Decay * velrelease,
608                        (pNote && pNote->Override.Decay.isFinal()) ?
609                            pNote->Override.Decay.Value :
610                            pRegion->EG1Decay2 * egInfo.Decay * velrelease,
611                        pRegion->EG1InfiniteSustain,
612                        (pNote && pNote->Override.Sustain.Final) ?
613                            uint(pNote->Override.Sustain.Value * 1000.f) :
614                            pRegion->EG1Sustain * (pNote ? pNote->Override.Sustain.Value : 1.f),
615                        (pNote && pNote->Override.Release.isFinal()) ?
616                            pNote->Override.Release.Value :
617                            RTMath::Max(pRegion->EG1Release * velrelease, 0.014) * egInfo.Release,
618                        velocityAttenuation,
619                        sampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
620        }
621    
622        void Voice::TriggerEG2(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) {
623            EG2.setStateOptions(
624                pRegion->EG2Options.AttackCancel,
625                pRegion->EG2Options.AttackHoldCancel,
626                pRegion->EG2Options.Decay1Cancel,
627                pRegion->EG2Options.Decay2Cancel,
628                pRegion->EG2Options.ReleaseCancel
629            );
630            EG2.trigger(uint(RgnInfo.EG2PreAttack),
631                        (pNote && pNote->Override.CutoffAttack.isFinal()) ?
632                            pNote->Override.CutoffAttack.Value :
633                            RgnInfo.EG2Attack * egInfo.Attack,
634                        false,
635                        (pNote && pNote->Override.CutoffDecay.isFinal()) ?
636                            pNote->Override.CutoffDecay.Value :
637                            RgnInfo.EG2Decay1 * egInfo.Decay * velrelease,
638                        (pNote && pNote->Override.CutoffDecay.isFinal()) ?
639                            pNote->Override.CutoffDecay.Value :
640                            RgnInfo.EG2Decay2 * egInfo.Decay * velrelease,
641                        RgnInfo.EG2InfiniteSustain,
642                        (pNote && pNote->Override.CutoffSustain.Final) ?
643                            uint(pNote->Override.CutoffSustain.Value * 1000.f) :
644                            uint(RgnInfo.EG2Sustain),
645                        (pNote && pNote->Override.CutoffRelease.isFinal()) ?
646                            pNote->Override.CutoffRelease.Value :
647                            RgnInfo.EG2Release * egInfo.Release * velrelease,
648                        velocityAttenuation,
649                        sampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
650        }
651    
652        void Voice::ProcessGroupEvent(RTList<Event>::Iterator& itEvent) {
653            dmsg(4,("Voice %p processGroupEvents event type=%d", (void*)this, itEvent->Type));
654    
655            // TODO: The SustainPedal condition could be wrong, maybe the
656            // check should be if this Voice is in release stage or is a
657            // release sample instead. Need to test this in GSt.
658            // -- Andreas
659            //
660            // Commented sustain pedal check out. I don't think voices of the same
661            // note should be stopped at all, because it doesn't sound naturally
662            // with a drumkit.
663            // -- Christian, 2013-01-08
664            if (itEvent->Param.Note.Key != HostKey() /*||
665                !GetGigEngineChannel()->SustainPedal*/) {
666                dmsg(4,("Voice %p - kill", (void*)this));
667    
668                // kill the voice fast
669                pEG1->enterFadeOutStage();
670            }
671        }
672    
673        void Voice::CalculateFadeOutCoeff(float FadeOutTime, float SampleRate) {
674            EG1.CalculateFadeOutCoeff(FadeOutTime, SampleRate);
675        }
676    
677        int Voice::CalculatePan(uint8_t pan) {
678            int p;
679            // Gst behaviour: -64 and 63 are special cases
680            if (RgnInfo.Pan == -64)     p = pan * 2 - 127;
681            else if (RgnInfo.Pan == 63) p = pan * 2;
682            else                        p = pan + RgnInfo.Pan;
683    
684            if (p < 0) return 0;
685            if (p > 127) return 127;
686            return p;
687        }
688    
689        release_trigger_t Voice::GetReleaseTriggerFlags() {
690            release_trigger_t flags =
691                (pRegion->NoNoteOffReleaseTrigger) ?
692                    release_trigger_none : release_trigger_noteoff; //HACK: currently this method is actually only called by EngineBase if it already knows that this voice requires release trigger, so I took the short way instead of checking (again) the existence of a ::gig::dimension_releasetrigger
693            switch (pRegion->SustainReleaseTrigger) {
694                case ::gig::sust_rel_trg_none:
695                    break;
696                case ::gig::sust_rel_trg_maxvelocity:
697                    flags |= release_trigger_sustain_maxvelocity;
698                    break;
699                case ::gig::sust_rel_trg_keyvelocity:
700                    flags |= release_trigger_sustain_keyvelocity;
701                    break;
702            }
703            return flags;
704      }      }
705    
706  }} // namespace LinuxSampler::gig  }} // namespace LinuxSampler::gig
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