/[svn]/linuxsampler/trunk/src/engines/gig/Voice.cpp
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revision 783 by persson, Sun Oct 2 14:40:52 2005 UTC revision 2327 by persson, Sat Mar 10 16:16:14 2012 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 Christian Schoenebeck                              *   *   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 24  Line 25 
25  #include "../../common/Features.h"  #include "../../common/Features.h"
26  #include "Synthesizer.h"  #include "Synthesizer.h"
27  #include "Profiler.h"  #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            pEG1 = &EG1;
38            pEG2 = &EG2;
39        }
40    
41      float Voice::CalculateFilterCutoffCoeff() {      Voice::~Voice() {
         return log(CONFIG_FILTER_CUTOFF_MAX / CONFIG_FILTER_CUTOFF_MIN);  
42      }      }
43    
44      Voice::Voice() {      EngineChannel* Voice::GetGigEngineChannel() {
45          pEngine     = NULL;          return static_cast<EngineChannel*>(pEngineChannel);
46          pDiskThread = NULL;      }
         PlaybackState = playback_state_end;  
         pLFO1 = new LFOUnsigned(1.0f);  // amplitude EG (0..1 range)  
         pLFO2 = new LFOUnsigned(1.0f);  // filter EG (0..1 range)  
         pLFO3 = new LFOSigned(1200.0f); // pitch EG (-1200..+1200 range)  
         KeyGroup = 0;  
         SynthesisMode = 0; // set all mode bits to 0 first  
         // select synthesis implementation (currently either pure C++ or MMX+SSE(1))  
         #if CONFIG_ASM && ARCH_X86  
         SYNTHESIS_MODE_SET_IMPLEMENTATION(SynthesisMode, Features::supportsMMX() && Features::supportsSSE());  
         #else  
         SYNTHESIS_MODE_SET_IMPLEMENTATION(SynthesisMode, false);  
         #endif  
         SYNTHESIS_MODE_SET_PROFILING(SynthesisMode, Profiler::isEnabled());  
47    
48          finalSynthesisParameters.filterLeft.Reset();      void Voice::SetEngine(LinuxSampler::Engine* pEngine) {
49          finalSynthesisParameters.filterRight.Reset();          Engine* engine = static_cast<Engine*>(pEngine);
50            this->pEngine     = engine;
51            this->pDiskThread = engine->pDiskThread;
52            dmsg(6,("Voice::SetEngine()\n"));
53      }      }
54    
55      Voice::~Voice() {      Voice::SampleInfo Voice::GetSampleInfo() {
56          if (pLFO1) delete pLFO1;          SampleInfo si;
57          if (pLFO2) delete pLFO2;          si.SampleRate       = pSample->SamplesPerSecond;
58          if (pLFO3) delete pLFO3;          si.ChannelCount     = pSample->Channels;
59            si.FrameSize        = pSample->FrameSize;
60            si.BitDepth         = pSample->BitDepth;
61            si.TotalFrameCount  = pSample->SamplesTotal;
62    
63            si.HasLoops       = pRegion->SampleLoops;
64            si.LoopStart      = (si.HasLoops) ? pRegion->pSampleLoops[0].LoopStart  : 0;
65            si.LoopLength     = (si.HasLoops) ? pRegion->pSampleLoops[0].LoopLength : 0;
66            si.LoopPlayCount  = pSample->LoopPlayCount;
67            si.Unpitched      = !pRegion->PitchTrack;
68    
69            return si;
70      }      }
71    
72      void Voice::SetEngine(Engine* pEngine) {      Voice::RegionInfo Voice::GetRegionInfo() {
73          this->pEngine     = pEngine;          RegionInfo ri;
74          this->pDiskThread = pEngine->pDiskThread;          ri.UnityNote = pRegion->UnityNote;
75          dmsg(6,("Voice::SetEngine()\n"));          ri.FineTune  = pRegion->FineTune;
76            ri.Pan       = pRegion->Pan;
77            ri.SampleStartOffset = pRegion->SampleStartOffset;
78    
79            ri.EG2PreAttack        = pRegion->EG2PreAttack;
80            ri.EG2Attack           = pRegion->EG2Attack;
81            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            ri.EG3Attack     = pRegion->EG3Attack;
88            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            ri.ReleaseTriggerDecay = 0.01053 * (256 >> pRegion->ReleaseTriggerDecay);
94    
95            return ri;
96        }
97    
98        Voice::InstrumentInfo Voice::GetInstrumentInfo() {
99            InstrumentInfo ii;
100            ii.FineTune = GetGigEngineChannel()->pInstrument->FineTune;
101            ii.PitchbendRange = GetGigEngineChannel()->pInstrument->PitchbendRange;
102    
103            return ii;
104        }
105    
106        double Voice::GetSampleAttenuation() {
107            return pRegion->SampleAttenuation;
108        }
109    
110        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      /**      void Voice::ProcessCCEvent(RTList<Event>::Iterator& itEvent) {
119       *  Initializes and triggers the voice, a disk stream will be launched if          if (itEvent->Type == Event::type_control_change && itEvent->Param.CC.Controller) { // if (valid) MIDI control change event
120       *  needed.              if (pRegion->AttenuationController.type == ::gig::attenuation_ctrl_t::type_controlchange &&
121       *                  itEvent->Param.CC.Controller == pRegion->AttenuationController.controller_number) {
122       *  @param pEngineChannel - engine channel on which this voice was ordered                  CrossfadeSmoother.update(AbstractEngine::CrossfadeCurve[CrossfadeAttenuation(itEvent->Param.CC.Value)]);
123       *  @param itNoteOnEvent  - event that caused triggering of this voice              }
      *  @param PitchBend      - MIDI detune factor (-8192 ... +8191)  
      *  @param pDimRgn        - points to the dimension region which provides sample wave(s) and articulation data  
      *  @param VoiceType      - type of this voice  
      *  @param iKeyGroup      - a value > 0 defines a key group in which this voice is member of  
      *  @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(EngineChannel* pEngineChannel, Pool<Event>::Iterator& itNoteOnEvent, int PitchBend, ::gig::DimensionRegion* pDimRgn, type_t VoiceType, int iKeyGroup) {  
         this->pEngineChannel = pEngineChannel;  
         this->pDimRgn        = pDimRgn;  
   
         #if CONFIG_DEVMODE  
         if (itNoteOnEvent->FragmentPos() > pEngine->MaxSamplesPerCycle) { // just a sanity check for debugging  
             dmsg(1,("Voice::Trigger(): ERROR, TriggerDelay > Totalsamples\n"));  
         }  
         #endif // CONFIG_DEVMODE  
   
         Type            = VoiceType;  
         MIDIKey         = itNoteOnEvent->Param.Note.Key;  
         PlaybackState   = playback_state_init; // mark voice as triggered, but no audio rendered yet  
         Delay           = itNoteOnEvent->FragmentPos();  
         itTriggerEvent  = itNoteOnEvent;  
         itKillEvent     = Pool<Event>::Iterator();  
         KeyGroup        = iKeyGroup;  
         pSample         = pDimRgn->pSample; // sample won't change until the voice is finished  
   
         // calculate volume  
         const double velocityAttenuation = pDimRgn->GetVelocityAttenuation(itNoteOnEvent->Param.Note.Velocity);  
   
         Volume = velocityAttenuation / 32768.0f; // we downscale by 32768 to convert from int16 value range to DSP value range (which is -1.0..1.0)  
   
         Volume *= pDimRgn->SampleAttenuation;  
   
         // the volume of release triggered samples depends on note length  
         if (Type == type_release_trigger) {  
             float noteLength = float(pEngine->FrameTime + Delay -  
                                      pEngineChannel->pMIDIKeyInfo[MIDIKey].NoteOnTime) / pEngine->SampleRate;  
             float attenuation = 1 - 0.01053 * (256 >> pDimRgn->ReleaseTriggerDecay) * noteLength;  
             if (attenuation <= 0) return -1;  
             Volume *= attenuation;  
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          // select channel mode (mono or stereo)          VCFCutoffCtrl.fvalue = cutoff; // needed for initialization of fFinalCutoff next time
137          SYNTHESIS_MODE_SET_CHANNELS(SynthesisMode, pSample->Channels == 2);          fFinalCutoff = cutoff;
138        }
139    
140          // get starting crossfade volume level      double Voice::CalculateCrossfadeVolume(uint8_t MIDIKeyVelocity) {
141          switch (pDimRgn->AttenuationController.type) {          float crossfadeVolume;
142            switch (pRegion->AttenuationController.type) {
143              case ::gig::attenuation_ctrl_t::type_channelaftertouch:              case ::gig::attenuation_ctrl_t::type_channelaftertouch:
144                  CrossfadeVolume = 1.0f; //TODO: aftertouch not supported yet                  crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(GetGigEngineChannel()->ControllerTable[128])];
145                  break;                  break;
146              case ::gig::attenuation_ctrl_t::type_velocity:              case ::gig::attenuation_ctrl_t::type_velocity:
147                  CrossfadeVolume = CrossfadeAttenuation(itNoteOnEvent->Param.Note.Velocity);                  crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(MIDIKeyVelocity)];
148                  break;                  break;
149              case ::gig::attenuation_ctrl_t::type_controlchange: //FIXME: currently not sample accurate              case ::gig::attenuation_ctrl_t::type_controlchange: //FIXME: currently not sample accurate
150                  CrossfadeVolume = CrossfadeAttenuation(pEngineChannel->ControllerTable[pDimRgn->AttenuationController.controller_number]);                  crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(GetGigEngineChannel()->ControllerTable[pRegion->AttenuationController.controller_number])];
151                  break;                  break;
152              case ::gig::attenuation_ctrl_t::type_none: // no crossfade defined              case ::gig::attenuation_ctrl_t::type_none: // no crossfade defined
153              default:              default:
154                  CrossfadeVolume = 1.0f;                  crossfadeVolume = 1.0f;
155          }          }
156    
157          PanLeft  = 1.0f - float(RTMath::Max(pDimRgn->Pan, 0)) /  63.0f;          return crossfadeVolume;
158          PanRight = 1.0f - float(RTMath::Min(pDimRgn->Pan, 0)) / -64.0f;      }
   
         finalSynthesisParameters.dPos = pDimRgn->SampleStartOffset; // offset where we should start playback of sample (0 - 2000 sample points)  
         Pos = pDimRgn->SampleStartOffset;  
   
         // Check if the sample needs disk streaming or is too short for that  
         long cachedsamples = pSample->GetCache().Size / pSample->FrameSize;  
         DiskVoice          = cachedsamples < pSample->SamplesTotal;  
   
         if (DiskVoice) { // voice to be streamed from disk  
             MaxRAMPos = cachedsamples - (pEngine->MaxSamplesPerCycle << CONFIG_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;  
                 loop.uiTotalCycles = pSample->LoopPlayCount;  
                 loop.uiCyclesLeft  = pSample->LoopPlayCount;  
                 loop.uiStart       = pSample->LoopStart;  
                 loop.uiEnd         = pSample->LoopEnd;  
                 loop.uiSize        = pSample->LoopSize;  
             }  
             else RAMLoop = false;  
159    
160              if (pDiskThread->OrderNewStream(&DiskStreamRef, pSample, MaxRAMPos, !RAMLoop) < 0) {      double Voice::GetEG1ControllerValue(uint8_t MIDIKeyVelocity) {
161                  dmsg(1,("Disk stream order failed!\n"));          double eg1controllervalue = 0;
162                  KillImmediately();          switch (pRegion->EG1Controller.type) {
163                  return -1;              case ::gig::eg1_ctrl_t::type_none: // no controller defined
164              }                  eg1controllervalue = 0;
165              dmsg(4,("Disk voice launched (cached samples: %d, total Samples: %d, MaxRAMPos: %d, RAMLooping: %s)\n", cachedsamples, pSample->SamplesTotal, MaxRAMPos, (RAMLoop) ? "yes" : "no"));                  break;
166          }              case ::gig::eg1_ctrl_t::type_channelaftertouch:
167          else { // RAM only voice                  eg1controllervalue = GetGigEngineChannel()->ControllerTable[128];
168              MaxRAMPos = cachedsamples;                  break;
169              if (pSample->Loops) {              case ::gig::eg1_ctrl_t::type_velocity:
170                  RAMLoop           = true;                  eg1controllervalue = MIDIKeyVelocity;
171                  loop.uiCyclesLeft = pSample->LoopPlayCount;                  break;
172              }              case ::gig::eg1_ctrl_t::type_controlchange: // MIDI control change controller
173              else RAMLoop = false;                  eg1controllervalue = GetGigEngineChannel()->ControllerTable[pRegion->EG1Controller.controller_number];
174              dmsg(4,("RAM only voice launched (Looping: %s)\n", (RAMLoop) ? "yes" : "no"));                  break;
175          }          }
176            if (pRegion->EG1ControllerInvert) eg1controllervalue = 127 - eg1controllervalue;
177    
178            return eg1controllervalue;
179        }
180    
181          // calculate initial pitch value      Voice::EGInfo Voice::CalculateEG1ControllerInfluence(double eg1ControllerValue) {
182          {          EGInfo eg;
183              double pitchbasecents = pDimRgn->FineTune + (int) pEngine->ScaleTuning[MIDIKey % 12];          // (eg1attack is different from the others)
184              if (pDimRgn->PitchTrack) pitchbasecents += (MIDIKey - (int) pDimRgn->UnityNote) * 100;          eg.Attack  = (pRegion->EG1ControllerAttackInfluence)  ?
185              this->PitchBase = RTMath::CentsToFreqRatio(pitchbasecents) * (double(pSample->SamplesPerSecond) / double(pEngine->SampleRate));              1 + 0.031 * (double) (pRegion->EG1ControllerAttackInfluence == 1 ?
186              this->PitchBend = RTMath::CentsToFreqRatio(((double) PitchBend / 8192.0) * 200.0); // pitchbend wheel +-2 semitones = 200 cents                                    1 : 1 << pRegion->EG1ControllerAttackInfluence) * eg1ControllerValue : 1.0;
187          }          eg.Decay   = (pRegion->EG1ControllerDecayInfluence)   ? 1 + 0.00775 * (double) (1 << pRegion->EG1ControllerDecayInfluence)   * eg1ControllerValue : 1.0;
188            eg.Release = (pRegion->EG1ControllerReleaseInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG1ControllerReleaseInfluence) * eg1ControllerValue : 1.0;
         // the length of the decay and release curves are dependent on the velocity  
         const double velrelease = 1 / pDimRgn->GetVelocityRelease(itNoteOnEvent->Param.Note.Velocity);  
   
         // setup EG 1 (VCA EG)  
         {  
             // get current value of EG1 controller  
             double eg1controllervalue;  
             switch (pDimRgn->EG1Controller.type) {  
                 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 = pEngineChannel->ControllerTable[pDimRgn->EG1Controller.controller_number];  
                     break;  
             }  
             if (pDimRgn->EG1ControllerInvert) eg1controllervalue = 127 - eg1controllervalue;  
   
             // calculate influence of EG1 controller on EG1's parameters  
             // (eg1attack is different from the others)  
             double eg1attack  = (pDimRgn->EG1ControllerAttackInfluence)  ?  
                 1 + 0.031 * (double) (pDimRgn->EG1ControllerAttackInfluence == 1 ?  
                                       1 : 1 << pDimRgn->EG1ControllerAttackInfluence) * eg1controllervalue : 1.0;  
             double eg1decay   = (pDimRgn->EG1ControllerDecayInfluence)   ? 1 + 0.00775 * (double) (1 << pDimRgn->EG1ControllerDecayInfluence)   * eg1controllervalue : 1.0;  
             double eg1release = (pDimRgn->EG1ControllerReleaseInfluence) ? 1 + 0.00775 * (double) (1 << pDimRgn->EG1ControllerReleaseInfluence) * eg1controllervalue : 1.0;  
   
             EG1.trigger(pDimRgn->EG1PreAttack,  
                         pDimRgn->EG1Attack * eg1attack,  
                         pDimRgn->EG1Hold,  
                         pDimRgn->EG1Decay1 * eg1decay * velrelease,  
                         pDimRgn->EG1Decay2 * eg1decay * velrelease,  
                         pDimRgn->EG1InfiniteSustain,  
                         pDimRgn->EG1Sustain,  
                         pDimRgn->EG1Release * eg1release * velrelease,  
                         velocityAttenuation,  
                         pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);  
         }  
   
189    
190          // setup EG 2 (VCF Cutoff EG)          return eg;
191          {      }
             // 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 = itNoteOnEvent->Param.Note.Velocity;  
                     break;  
                 case ::gig::eg2_ctrl_t::type_controlchange: // MIDI control change controller  
                     eg2controllervalue = pEngineChannel->ControllerTable[pDimRgn->EG2Controller.controller_number];  
                     break;  
             }  
             if (pDimRgn->EG2ControllerInvert) eg2controllervalue = 127 - eg2controllervalue;  
192    
193              // calculate influence of EG2 controller on EG2's parameters      double Voice::GetEG2ControllerValue(uint8_t MIDIKeyVelocity) {
194              double eg2attack  = (pDimRgn->EG2ControllerAttackInfluence)  ? 1 + 0.00775 * (double) (1 << pDimRgn->EG2ControllerAttackInfluence)  * eg2controllervalue : 1.0;          double eg2controllervalue = 0;
195              double eg2decay   = (pDimRgn->EG2ControllerDecayInfluence)   ? 1 + 0.00775 * (double) (1 << pDimRgn->EG2ControllerDecayInfluence)   * eg2controllervalue : 1.0;          switch (pRegion->EG2Controller.type) {
196              double eg2release = (pDimRgn->EG2ControllerReleaseInfluence) ? 1 + 0.00775 * (double) (1 << pDimRgn->EG2ControllerReleaseInfluence) * eg2controllervalue : 1.0;              case ::gig::eg2_ctrl_t::type_none: // no controller defined
197                    eg2controllervalue = 0;
198              EG2.trigger(pDimRgn->EG2PreAttack,                  break;
199                          pDimRgn->EG2Attack * eg2attack,              case ::gig::eg2_ctrl_t::type_channelaftertouch:
200                          false,                  eg2controllervalue = GetGigEngineChannel()->ControllerTable[128];
201                          pDimRgn->EG2Decay1 * eg2decay * velrelease,                  break;
202                          pDimRgn->EG2Decay2 * eg2decay * velrelease,              case ::gig::eg2_ctrl_t::type_velocity:
203                          pDimRgn->EG2InfiniteSustain,                  eg2controllervalue = MIDIKeyVelocity;
204                          pDimRgn->EG2Sustain,                  break;
205                          pDimRgn->EG2Release * eg2release * velrelease,              case ::gig::eg2_ctrl_t::type_controlchange: // MIDI control change controller
206                          velocityAttenuation,                  eg2controllervalue = GetGigEngineChannel()->ControllerTable[pRegion->EG2Controller.controller_number];
207                          pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);                  break;
208          }          }
209            if (pRegion->EG2ControllerInvert) eg2controllervalue = 127 - eg2controllervalue;
210    
211            return eg2controllervalue;
212        }
213    
214          // setup EG 3 (VCO EG)      Voice::EGInfo Voice::CalculateEG2ControllerInfluence(double eg2ControllerValue) {
215          {          EGInfo eg;
216            double eg3depth = RTMath::CentsToFreqRatio(pDimRgn->EG3Depth);          eg.Attack  = (pRegion->EG2ControllerAttackInfluence)  ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerAttackInfluence)  * eg2ControllerValue : 1.0;
217            EG3.trigger(eg3depth, pDimRgn->EG3Attack, pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);          eg.Decay   = (pRegion->EG2ControllerDecayInfluence)   ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerDecayInfluence)   * eg2ControllerValue : 1.0;
218          }          eg.Release = (pRegion->EG2ControllerReleaseInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerReleaseInfluence) * eg2ControllerValue : 1.0;
219    
220            return eg;
221        }
222    
223          // setup LFO 1 (VCA LFO)      void Voice::InitLFO1() {
224          {          uint16_t lfo1_internal_depth;
225              uint16_t lfo1_internal_depth;          switch (pRegion->LFO1Controller) {
226              switch (pDimRgn->LFO1Controller) {              case ::gig::lfo1_ctrl_internal:
227                  case ::gig::lfo1_ctrl_internal:                  lfo1_internal_depth  = pRegion->LFO1InternalDepth;
228                      lfo1_internal_depth  = pDimRgn->LFO1InternalDepth;                  pLFO1->ExtController = 0; // no external controller
229                      pLFO1->ExtController = 0; // no external controller                  bLFO1Enabled         = (lfo1_internal_depth > 0);
230                      bLFO1Enabled         = (lfo1_internal_depth > 0);                  break;
231                      break;              case ::gig::lfo1_ctrl_modwheel:
232                  case ::gig::lfo1_ctrl_modwheel:                  lfo1_internal_depth  = 0;
233                      lfo1_internal_depth  = 0;                  pLFO1->ExtController = 1; // MIDI controller 1
234                      pLFO1->ExtController = 1; // MIDI controller 1                  bLFO1Enabled         = (pRegion->LFO1ControlDepth > 0);
235                      bLFO1Enabled         = (pDimRgn->LFO1ControlDepth > 0);                  break;
236                      break;              case ::gig::lfo1_ctrl_breath:
237                  case ::gig::lfo1_ctrl_breath:                  lfo1_internal_depth  = 0;
238                      lfo1_internal_depth  = 0;                  pLFO1->ExtController = 2; // MIDI controller 2
239                      pLFO1->ExtController = 2; // MIDI controller 2                  bLFO1Enabled         = (pRegion->LFO1ControlDepth > 0);
240                      bLFO1Enabled         = (pDimRgn->LFO1ControlDepth > 0);                  break;
241                      break;              case ::gig::lfo1_ctrl_internal_modwheel:
242                  case ::gig::lfo1_ctrl_internal_modwheel:                  lfo1_internal_depth  = pRegion->LFO1InternalDepth;
243                      lfo1_internal_depth  = pDimRgn->LFO1InternalDepth;                  pLFO1->ExtController = 1; // MIDI controller 1
244                      pLFO1->ExtController = 1; // MIDI controller 1                  bLFO1Enabled         = (lfo1_internal_depth > 0 || pRegion->LFO1ControlDepth > 0);
245                      bLFO1Enabled         = (lfo1_internal_depth > 0 || pDimRgn->LFO1ControlDepth > 0);                  break;
246                      break;              case ::gig::lfo1_ctrl_internal_breath:
247                  case ::gig::lfo1_ctrl_internal_breath:                  lfo1_internal_depth  = pRegion->LFO1InternalDepth;
248                      lfo1_internal_depth  = pDimRgn->LFO1InternalDepth;                  pLFO1->ExtController = 2; // MIDI controller 2
249                      pLFO1->ExtController = 2; // MIDI controller 2                  bLFO1Enabled         = (lfo1_internal_depth > 0 || pRegion->LFO1ControlDepth > 0);
250                      bLFO1Enabled         = (lfo1_internal_depth > 0 || pDimRgn->LFO1ControlDepth > 0);                  break;
251                      break;              default:
252                  default:                  lfo1_internal_depth  = 0;
253                      lfo1_internal_depth  = 0;                  pLFO1->ExtController = 0; // no external controller
254                      pLFO1->ExtController = 0; // no external controller                  bLFO1Enabled         = false;
255                      bLFO1Enabled         = false;          }
256              }          if (bLFO1Enabled) {
257              if (bLFO1Enabled) pLFO1->trigger(pDimRgn->LFO1Frequency,              pLFO1->trigger(pRegion->LFO1Frequency,
258                                               start_level_max,                             start_level_min,
259                                               lfo1_internal_depth,                             lfo1_internal_depth,
260                                               pDimRgn->LFO1ControlDepth,                             pRegion->LFO1ControlDepth,
261                                               pDimRgn->LFO1FlipPhase,                             pRegion->LFO1FlipPhase,
262                                               pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);                             pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
263                pLFO1->update(pLFO1->ExtController ? GetGigEngineChannel()->ControllerTable[pLFO1->ExtController] : 0);
264          }          }
265        }
266    
267        void Voice::InitLFO2() {
268          // setup LFO 2 (VCF Cutoff LFO)          uint16_t lfo2_internal_depth;
269          {          switch (pRegion->LFO2Controller) {
270              uint16_t lfo2_internal_depth;              case ::gig::lfo2_ctrl_internal:
271              switch (pDimRgn->LFO2Controller) {                  lfo2_internal_depth  = pRegion->LFO2InternalDepth;
272                  case ::gig::lfo2_ctrl_internal:                  pLFO2->ExtController = 0; // no external controller
273                      lfo2_internal_depth  = pDimRgn->LFO2InternalDepth;                  bLFO2Enabled         = (lfo2_internal_depth > 0);
274                      pLFO2->ExtController = 0; // no external controller                  break;
275                      bLFO2Enabled         = (lfo2_internal_depth > 0);              case ::gig::lfo2_ctrl_modwheel:
276                      break;                  lfo2_internal_depth  = 0;
277                  case ::gig::lfo2_ctrl_modwheel:                  pLFO2->ExtController = 1; // MIDI controller 1
278                      lfo2_internal_depth  = 0;                  bLFO2Enabled         = (pRegion->LFO2ControlDepth > 0);
279                      pLFO2->ExtController = 1; // MIDI controller 1                  break;
280                      bLFO2Enabled         = (pDimRgn->LFO2ControlDepth > 0);              case ::gig::lfo2_ctrl_foot:
281                      break;                  lfo2_internal_depth  = 0;
282                  case ::gig::lfo2_ctrl_foot:                  pLFO2->ExtController = 4; // MIDI controller 4
283                      lfo2_internal_depth  = 0;                  bLFO2Enabled         = (pRegion->LFO2ControlDepth > 0);
284                      pLFO2->ExtController = 4; // MIDI controller 4                  break;
285                      bLFO2Enabled         = (pDimRgn->LFO2ControlDepth > 0);              case ::gig::lfo2_ctrl_internal_modwheel:
286                      break;                  lfo2_internal_depth  = pRegion->LFO2InternalDepth;
287                  case ::gig::lfo2_ctrl_internal_modwheel:                  pLFO2->ExtController = 1; // MIDI controller 1
288                      lfo2_internal_depth  = pDimRgn->LFO2InternalDepth;                  bLFO2Enabled         = (lfo2_internal_depth > 0 || pRegion->LFO2ControlDepth > 0);
289                      pLFO2->ExtController = 1; // MIDI controller 1                  break;
290                      bLFO2Enabled         = (lfo2_internal_depth > 0 || pDimRgn->LFO2ControlDepth > 0);              case ::gig::lfo2_ctrl_internal_foot:
291                      break;                  lfo2_internal_depth  = pRegion->LFO2InternalDepth;
292                  case ::gig::lfo2_ctrl_internal_foot:                  pLFO2->ExtController = 4; // MIDI controller 4
293                      lfo2_internal_depth  = pDimRgn->LFO2InternalDepth;                  bLFO2Enabled         = (lfo2_internal_depth > 0 || pRegion->LFO2ControlDepth > 0);
294                      pLFO2->ExtController = 4; // MIDI controller 4                  break;
295                      bLFO2Enabled         = (lfo2_internal_depth > 0 || pDimRgn->LFO2ControlDepth > 0);              default:
296                      break;                  lfo2_internal_depth  = 0;
297                  default:                  pLFO2->ExtController = 0; // no external controller
298                      lfo2_internal_depth  = 0;                  bLFO2Enabled         = false;
299                      pLFO2->ExtController = 0; // no external controller          }
300                      bLFO2Enabled         = false;          if (bLFO2Enabled) {
301              }              pLFO2->trigger(pRegion->LFO2Frequency,
302              if (bLFO2Enabled) pLFO2->trigger(pDimRgn->LFO2Frequency,                             start_level_max,
303                                               start_level_max,                             lfo2_internal_depth,
304                                               lfo2_internal_depth,                             pRegion->LFO2ControlDepth,
305                                               pDimRgn->LFO2ControlDepth,                             pRegion->LFO2FlipPhase,
306                                               pDimRgn->LFO2FlipPhase,                             pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
307                                               pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);              pLFO2->update(pLFO2->ExtController ? GetGigEngineChannel()->ControllerTable[pLFO2->ExtController] : 0);
308          }          }
309        }
310    
311        void Voice::InitLFO3() {
312          // setup LFO 3 (VCO LFO)          uint16_t lfo3_internal_depth;
313          {          switch (pRegion->LFO3Controller) {
314              uint16_t lfo3_internal_depth;              case ::gig::lfo3_ctrl_internal:
315              switch (pDimRgn->LFO3Controller) {                  lfo3_internal_depth  = pRegion->LFO3InternalDepth;
316                  case ::gig::lfo3_ctrl_internal:                  pLFO3->ExtController = 0; // no external controller
317                      lfo3_internal_depth  = pDimRgn->LFO3InternalDepth;                  bLFO3Enabled         = (lfo3_internal_depth > 0);
318                      pLFO3->ExtController = 0; // no external controller                  break;
319                      bLFO3Enabled         = (lfo3_internal_depth > 0);              case ::gig::lfo3_ctrl_modwheel:
320                      break;                  lfo3_internal_depth  = 0;
321                  case ::gig::lfo3_ctrl_modwheel:                  pLFO3->ExtController = 1; // MIDI controller 1
322                      lfo3_internal_depth  = 0;                  bLFO3Enabled         = (pRegion->LFO3ControlDepth > 0);
323                      pLFO3->ExtController = 1; // MIDI controller 1                  break;
324                      bLFO3Enabled         = (pDimRgn->LFO3ControlDepth > 0);              case ::gig::lfo3_ctrl_aftertouch:
325                      break;                  lfo3_internal_depth  = 0;
326                  case ::gig::lfo3_ctrl_aftertouch:                  pLFO3->ExtController = 128;
327                      lfo3_internal_depth  = 0;                  bLFO3Enabled         = true;
328                      pLFO3->ExtController = 0; // TODO: aftertouch not implemented yet                  break;
329                      bLFO3Enabled         = false; // see TODO comment in line above              case ::gig::lfo3_ctrl_internal_modwheel:
330                      break;                  lfo3_internal_depth  = pRegion->LFO3InternalDepth;
331                  case ::gig::lfo3_ctrl_internal_modwheel:                  pLFO3->ExtController = 1; // MIDI controller 1
332                      lfo3_internal_depth  = pDimRgn->LFO3InternalDepth;                  bLFO3Enabled         = (lfo3_internal_depth > 0 || pRegion->LFO3ControlDepth > 0);
333                      pLFO3->ExtController = 1; // MIDI controller 1                  break;
334                      bLFO3Enabled         = (lfo3_internal_depth > 0 || pDimRgn->LFO3ControlDepth > 0);              case ::gig::lfo3_ctrl_internal_aftertouch:
335                      break;                  lfo3_internal_depth  = pRegion->LFO3InternalDepth;
336                  case ::gig::lfo3_ctrl_internal_aftertouch:                  pLFO3->ExtController = 128;
337                      lfo3_internal_depth  = pDimRgn->LFO3InternalDepth;                  bLFO3Enabled         = (lfo3_internal_depth > 0 || pRegion->LFO3ControlDepth > 0);
338                      pLFO1->ExtController = 0; // TODO: aftertouch not implemented yet                  break;
339                      bLFO3Enabled         = (lfo3_internal_depth > 0 /*|| pDimRgn->LFO3ControlDepth > 0*/); // see TODO comment in line above              default:
340                      break;                  lfo3_internal_depth  = 0;
341                  default:                  pLFO3->ExtController = 0; // no external controller
342                      lfo3_internal_depth  = 0;                  bLFO3Enabled         = false;
343                      pLFO3->ExtController = 0; // no external controller          }
344                      bLFO3Enabled         = false;          if (bLFO3Enabled) {
345              }              pLFO3->trigger(pRegion->LFO3Frequency,
346              if (bLFO3Enabled) pLFO3->trigger(pDimRgn->LFO3Frequency,                             start_level_mid,
347                                               start_level_mid,                             lfo3_internal_depth,
348                                               lfo3_internal_depth,                             pRegion->LFO3ControlDepth,
349                                               pDimRgn->LFO3ControlDepth,                             false,
350                                               false,                             pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
351                                               pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);              pLFO3->update(pLFO3->ExtController ? GetGigEngineChannel()->ControllerTable[pLFO3->ExtController] : 0);
352          }          }
353        }
354    
355        float Voice::CalculateCutoffBase(uint8_t MIDIKeyVelocity) {
356          #if CONFIG_FORCE_FILTER          float cutoff = pRegion->GetVelocityCutoff(MIDIKeyVelocity);
357          const bool bUseFilter = true;          if (pRegion->VCFKeyboardTracking) {
358          #else // use filter only if instrument file told so              cutoff *= RTMath::CentsToFreqRatioUnlimited((MIDIKey - pRegion->VCFKeyboardTrackingBreakpoint) * 100);
359          const bool bUseFilter = pDimRgn->VCFEnabled;          }
360          #endif // CONFIG_FORCE_FILTER          return cutoff;
361          SYNTHESIS_MODE_SET_FILTER(SynthesisMode, bUseFilter);      }
362          if (bUseFilter) {  
363              #ifdef CONFIG_OVERRIDE_CUTOFF_CTRL      float Voice::CalculateFinalCutoff(float cutoffBase) {
364              VCFCutoffCtrl.controller = CONFIG_OVERRIDE_CUTOFF_CTRL;          int cvalue;
365              #else // use the one defined in the instrument file          if (VCFCutoffCtrl.controller) {
366              switch (pDimRgn->VCFCutoffController) {              cvalue = GetGigEngineChannel()->ControllerTable[VCFCutoffCtrl.controller];
367                  case ::gig::vcf_cutoff_ctrl_modwheel:              if (pRegion->VCFCutoffControllerInvert) cvalue = 127 - cvalue;
368                      VCFCutoffCtrl.controller = 1;              // VCFVelocityScale in this case means Minimum cutoff
369                      break;              if (cvalue < pRegion->VCFVelocityScale) cvalue = pRegion->VCFVelocityScale;
                 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 // CONFIG_OVERRIDE_CUTOFF_CTRL  
   
             #ifdef CONFIG_OVERRIDE_RESONANCE_CTRL  
             VCFResonanceCtrl.controller = CONFIG_OVERRIDE_RESONANCE_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 // CONFIG_OVERRIDE_RESONANCE_CTRL  
   
             #ifndef CONFIG_OVERRIDE_FILTER_TYPE  
             finalSynthesisParameters.filterLeft.SetType(pDimRgn->VCFType);  
             finalSynthesisParameters.filterRight.SetType(pDimRgn->VCFType);  
             #else // override filter type  
             FilterLeft.SetType(CONFIG_OVERRIDE_FILTER_TYPE);  
             FilterRight.SetType(CONFIG_OVERRIDE_FILTER_TYPE);  
             #endif // CONFIG_OVERRIDE_FILTER_TYPE  
   
             VCFCutoffCtrl.value    = pEngineChannel->ControllerTable[VCFCutoffCtrl.controller];  
             VCFResonanceCtrl.value = pEngineChannel->ControllerTable[VCFResonanceCtrl.controller];  
   
             // calculate cutoff frequency  
             float cutoff = pDimRgn->GetVelocityCutoff(itNoteOnEvent->Param.Note.Velocity);  
             if (pDimRgn->VCFKeyboardTracking) {  
                 cutoff *= exp((itNoteOnEvent->Param.Note.Key - pDimRgn->VCFKeyboardTrackingBreakpoint) * 0.057762265f); // (ln(2) / 12)  
             }  
             CutoffBase = cutoff;  
   
             int cvalue;  
             if (VCFCutoffCtrl.controller) {  
                 cvalue = pEngineChannel->ControllerTable[VCFCutoffCtrl.controller];  
                 if (pDimRgn->VCFCutoffControllerInvert) cvalue = 127 - cvalue;  
                 if (cvalue < pDimRgn->VCFVelocityScale) cvalue = pDimRgn->VCFVelocityScale;  
             }  
             else {  
                 cvalue = pDimRgn->VCFCutoff;  
             }  
             cutoff *= float(cvalue) * 0.00787402f; // (1 / 127)  
             if (cutoff > 1.0) cutoff = 1.0;  
             cutoff = exp(cutoff * FILTER_CUTOFF_COEFF) * CONFIG_FILTER_CUTOFF_MIN;  
   
             // 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 - CONFIG_FILTER_CUTOFF_MIN;  
             VCFResonanceCtrl.fvalue = resonance;  
370          }          }
371          else {          else {
372              VCFCutoffCtrl.controller    = 0;              cvalue = pRegion->VCFCutoff;
             VCFResonanceCtrl.controller = 0;  
373          }          }
374            float fco = cutoffBase * float(cvalue);
375            if (fco > 127.0f) fco = 127.0f;
376    
377          return 0; // success          return fco;
378      }      }
379    
380      /**      uint8_t Voice::GetVCFCutoffCtrl() {
381       *  Renders the audio data for this voice for the current audio fragment.          uint8_t ctrl;
382       *  The sample input data can either come from RAM (cached sample or sample          switch (pRegion->VCFCutoffController) {
383       *  part) or directly from disk. The output signal will be rendered by              case ::gig::vcf_cutoff_ctrl_modwheel:
384       *  resampling / interpolation. If this voice is a disk streaming voice and                  ctrl = 1;
385       *  the voice completely played back the cached RAM part of the sample, it                  break;
386       *  will automatically switch to disk playback for the next RenderAudio()              case ::gig::vcf_cutoff_ctrl_effect1:
387       *  call.                  ctrl = 12;
388       *                  break;
389       *  @param Samples - number of samples to be rendered in this audio fragment cycle              case ::gig::vcf_cutoff_ctrl_effect2:
390       */                  ctrl = 13;
391      void Voice::Render(uint Samples) {                  break;
392                case ::gig::vcf_cutoff_ctrl_breath:
393          // select default values for synthesis mode bits                  ctrl = 2;
394          SYNTHESIS_MODE_SET_LOOP(SynthesisMode, false);                  break;
395                case ::gig::vcf_cutoff_ctrl_foot:
396          switch (this->PlaybackState) {                  ctrl = 4;
397                    break;
398              case playback_state_init:              case ::gig::vcf_cutoff_ctrl_sustainpedal:
399                  this->PlaybackState = playback_state_ram; // we always start playback from RAM cache and switch then to disk if needed                  ctrl = 64;
400                  // no break - continue with playback_state_ram                  break;
401                case ::gig::vcf_cutoff_ctrl_softpedal:
402              case playback_state_ram: {                  ctrl = 67;
403                      if (RAMLoop) SYNTHESIS_MODE_SET_LOOP(SynthesisMode, true); // enable looping                  break;
404                case ::gig::vcf_cutoff_ctrl_genpurpose7:
405                      // render current fragment                  ctrl = 82;
406                      Synthesize(Samples, (sample_t*) pSample->GetCache().pStart, Delay);                  break;
407                case ::gig::vcf_cutoff_ctrl_genpurpose8:
408                      if (DiskVoice) {                  ctrl = 83;
409                          // check if we reached the allowed limit of the sample RAM cache                  break;
410                          if (finalSynthesisParameters.dPos > MaxRAMPos) {              case ::gig::vcf_cutoff_ctrl_aftertouch:
411                              dmsg(5,("Voice: switching to disk playback (Pos=%f)\n", finalSynthesisParameters.dPos));                  ctrl = 128;
412                              this->PlaybackState = playback_state_disk;                  break;
413                          }              case ::gig::vcf_cutoff_ctrl_none:
414                      } else if (finalSynthesisParameters.dPos >= pSample->GetCache().Size / pSample->FrameSize) {              default:
415                          this->PlaybackState = playback_state_end;                  ctrl = 0;
416                      }                  break;
                 }  
                 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 * (int(finalSynthesisParameters.dPos) - MaxRAMPos));  
                         finalSynthesisParameters.dPos -= int(finalSynthesisParameters.dPos);  
                         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 << CONFIG_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) finalSynthesisParameters.dPos;  
                     const int readSampleWords = iPos * pSample->Channels; // amount of sample words actually been read  
                     DiskStreamRef.pStream->IncrementReadPos(readSampleWords);  
                     finalSynthesisParameters.dPos -= iPos; // just keep fractional part of playback position  
   
                     // 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;  
                     }  
                 }  
                 break;  
   
             case playback_state_end:  
                 std::cerr << "gig::Voice::Render(): entered with playback_state_end, this is a bug!\n" << std::flush;  
                 break;  
         }  
   
         // Reset delay  
         Delay = 0;  
   
         itTriggerEvent = Pool<Event>::Iterator();  
   
         // If sample stream or release stage finished, kill the voice  
         if (PlaybackState == playback_state_end || EG1.getSegmentType() == EGADSR::segment_end) KillImmediately();  
     }  
   
     /**  
      *  Resets voice variables. Should only be called if rendering process is  
      *  suspended / not running.  
      */  
     void Voice::Reset() {  
         finalSynthesisParameters.filterLeft.Reset();  
         finalSynthesisParameters.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 given list of MIDI note on, note off and sustain pedal events  
      * for the given time.  
      *  
      * @param itEvent - iterator pointing to the next event to be processed  
      * @param End     - youngest time stamp where processing should be stopped  
      */  
     void Voice::processTransitionEvents(RTList<Event>::Iterator& itEvent, uint End) {  
         for (; itEvent && itEvent->FragmentPos() <= End; ++itEvent) {  
             if (itEvent->Type == Event::type_release) {  
                 EG1.update(EGADSR::event_release, pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);  
                 EG2.update(EGADSR::event_release, pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);  
             } else if (itEvent->Type == Event::type_cancel_release) {  
                 EG1.update(EGADSR::event_cancel_release, pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);  
                 EG2.update(EGADSR::event_cancel_release, pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);  
             }  
417          }          }
418    
419            return ctrl;
420      }      }
421    
422      /**      uint8_t Voice::GetVCFResonanceCtrl() {
423       * Process given list of MIDI control change and pitch bend events for          uint8_t ctrl;
424       * the given time.          switch (pRegion->VCFResonanceController) {
425       *              case ::gig::vcf_res_ctrl_genpurpose3:
426       * @param itEvent - iterator pointing to the next event to be processed                  ctrl = 18;
427       * @param End     - youngest time stamp where processing should be stopped                  break;
428       */              case ::gig::vcf_res_ctrl_genpurpose4:
429      void Voice::processCCEvents(RTList<Event>::Iterator& itEvent, uint End) {                  ctrl = 19;
430          for (; itEvent && itEvent->FragmentPos() <= End; ++itEvent) {                  break;
431              if (itEvent->Type == Event::type_control_change &&              case ::gig::vcf_res_ctrl_genpurpose5:
432                  itEvent->Param.CC.Controller) { // if (valid) MIDI control change event                  ctrl = 80;
433                  if (itEvent->Param.CC.Controller == VCFCutoffCtrl.controller) {                  break;
434                      processCutoffEvent(itEvent);              case ::gig::vcf_res_ctrl_genpurpose6:
435                  }                  ctrl = 81;
436                  if (itEvent->Param.CC.Controller == VCFResonanceCtrl.controller) {                  break;
437                      processResonanceEvent(itEvent);              case ::gig::vcf_res_ctrl_none:
438                  }              default:
439                  if (itEvent->Param.CC.Controller == pLFO1->ExtController) {                  ctrl = 0;
                     pLFO1->update(itEvent->Param.CC.Value);  
                 }  
                 if (itEvent->Param.CC.Controller == pLFO2->ExtController) {  
                     pLFO2->update(itEvent->Param.CC.Value);  
                 }  
                 if (itEvent->Param.CC.Controller == pLFO3->ExtController) {  
                     pLFO3->update(itEvent->Param.CC.Value);  
                 }  
                 if (pDimRgn->AttenuationController.type == ::gig::attenuation_ctrl_t::type_controlchange &&  
                     itEvent->Param.CC.Controller == pDimRgn->AttenuationController.controller_number) {  
                     processCrossFadeEvent(itEvent);  
                 }  
             } else if (itEvent->Type == Event::type_pitchbend) { // if pitch bend event  
                 processPitchEvent(itEvent);  
             }  
440          }          }
     }  
441    
442      void Voice::processPitchEvent(RTList<Event>::Iterator& itEvent) {          return ctrl;
         const float pitch = RTMath::CentsToFreqRatio(((double) itEvent->Param.Pitch.Pitch / 8192.0) * 200.0); // +-two semitones = +-200 cents  
         finalSynthesisParameters.fFinalPitch *= pitch;  
         PitchBend = pitch;  
     }  
   
     void Voice::processCrossFadeEvent(RTList<Event>::Iterator& itEvent) {  
         CrossfadeVolume = CrossfadeAttenuation(itEvent->Param.CC.Value);  
         #if CONFIG_PROCESS_MUTED_CHANNELS  
         const float effectiveVolume = CrossfadeVolume * Volume * (pEngineChannel->GetMute() ? 0 : pEngineChannel->GlobalVolume);  
         #else  
         const float effectiveVolume = CrossfadeVolume * Volume * pEngineChannel->GlobalVolume;  
         #endif  
         fFinalVolume = effectiveVolume;  
443      }      }
444    
445      void Voice::processCutoffEvent(RTList<Event>::Iterator& itEvent) {      void Voice::TriggerEG1(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) {
446          int ccvalue = itEvent->Param.CC.Value;          EG1.trigger(pRegion->EG1PreAttack,
447          if (VCFCutoffCtrl.value == ccvalue) return;                      pRegion->EG1Attack * egInfo.Attack,
448          VCFCutoffCtrl.value == ccvalue;                      pRegion->EG1Hold,
449          if (pDimRgn->VCFCutoffControllerInvert)  ccvalue = 127 - ccvalue;                      pRegion->EG1Decay1 * egInfo.Decay * velrelease,
450          if (ccvalue < pDimRgn->VCFVelocityScale) ccvalue = pDimRgn->VCFVelocityScale;                      pRegion->EG1Decay2 * egInfo.Decay * velrelease,
451          float cutoff = CutoffBase * float(ccvalue) * 0.00787402f; // (1 / 127)                      pRegion->EG1InfiniteSustain,
452          if (cutoff > 1.0) cutoff = 1.0;                      pRegion->EG1Sustain,
453          cutoff = exp(cutoff * FILTER_CUTOFF_COEFF) * CONFIG_FILTER_CUTOFF_MIN - CONFIG_FILTER_CUTOFF_MIN;                      pRegion->EG1Release * egInfo.Release * velrelease,
454          VCFCutoffCtrl.fvalue = cutoff; // needed for initialization of fFinalCutoff next time                      velocityAttenuation,
455          fFinalCutoff = cutoff;                      sampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
456      }      }
457    
458      void Voice::processResonanceEvent(RTList<Event>::Iterator& itEvent) {      void Voice::TriggerEG2(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) {
459          // convert absolute controller value to differential          EG2.trigger(uint(RgnInfo.EG2PreAttack),
460          const int ctrldelta = itEvent->Param.CC.Value - VCFResonanceCtrl.value;                      RgnInfo.EG2Attack * egInfo.Attack,
461          VCFResonanceCtrl.value = itEvent->Param.CC.Value;                      false,
462          const float resonancedelta = (float) ctrldelta * 0.00787f; // 0.0..1.0                      RgnInfo.EG2Decay1 * egInfo.Decay * velrelease,
463          fFinalResonance += resonancedelta;                      RgnInfo.EG2Decay2 * egInfo.Decay * velrelease,
464          // needed for initialization of parameter                      RgnInfo.EG2InfiniteSustain,
465          VCFResonanceCtrl.fvalue = itEvent->Param.CC.Value * 0.00787f;                      uint(RgnInfo.EG2Sustain),
466      }                      RgnInfo.EG2Release * egInfo.Release * velrelease,
467                        velocityAttenuation,
468      /**                      sampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
469       *  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) {  
         finalSynthesisParameters.pOutLeft  = &pEngineChannel->pOutputLeft[Skip];  
         finalSynthesisParameters.pOutRight = &pEngineChannel->pOutputRight[Skip];  
         finalSynthesisParameters.pSrc      = pSrc;  
   
         RTList<Event>::Iterator itCCEvent = pEngineChannel->pEvents->first();  
         RTList<Event>::Iterator itNoteEvent = pEngineChannel->pMIDIKeyInfo[MIDIKey].pEvents->first();  
   
         if (Skip) { // skip events that happened before this voice was triggered  
             while (itCCEvent && itCCEvent->FragmentPos() <= Skip) ++itCCEvent;  
             while (itNoteEvent && itNoteEvent->FragmentPos() <= Skip) ++itNoteEvent;  
         }  
   
         uint i = Skip;  
         while (i < Samples) {  
             int iSubFragmentEnd = RTMath::Min(i + CONFIG_DEFAULT_SUBFRAGMENT_SIZE, Samples);  
   
             // initialize all final synthesis parameters  
             finalSynthesisParameters.fFinalPitch = PitchBase * PitchBend;  
             #if CONFIG_PROCESS_MUTED_CHANNELS  
             fFinalVolume = this->Volume * this->CrossfadeVolume * (pEngineChannel->GetMute() ? 0 : pEngineChannel->GlobalVolume);  
             #else  
             fFinalVolume = this->Volume * this->CrossfadeVolume * pEngineChannel->GlobalVolume;  
             #endif  
             fFinalCutoff    = VCFCutoffCtrl.fvalue;  
             fFinalResonance = VCFResonanceCtrl.fvalue;  
   
             // process MIDI control change and pitchbend events for this subfragment  
             processCCEvents(itCCEvent, iSubFragmentEnd);  
   
             // process transition events (note on, note off & sustain pedal)  
             processTransitionEvents(itNoteEvent, iSubFragmentEnd);  
   
             // process envelope generators  
             switch (EG1.getSegmentType()) {  
                 case EGADSR::segment_lin:  
                     fFinalVolume *= EG1.processLin();  
                     break;  
                 case EGADSR::segment_exp:  
                     fFinalVolume *= EG1.processExp();  
                     break;  
                 case EGADSR::segment_end:  
                     fFinalVolume *= EG1.getLevel();  
                     break; // noop  
             }  
             switch (EG2.getSegmentType()) {  
                 case EGADSR::segment_lin:  
                     fFinalCutoff *= EG2.processLin();  
                     break;  
                 case EGADSR::segment_exp:  
                     fFinalCutoff *= EG2.processExp();  
                     break;  
                 case EGADSR::segment_end:  
                     fFinalCutoff *= EG2.getLevel();  
                     break; // noop  
             }  
             if (EG3.active()) finalSynthesisParameters.fFinalPitch *= RTMath::CentsToFreqRatio(EG3.render());  
470    
471              // process low frequency oscillators      void Voice::ProcessGroupEvent(RTList<Event>::Iterator& itEvent) {
472              if (bLFO1Enabled) fFinalVolume *= pLFO1->render();          dmsg(4,("Voice %x processGroupEvents event type=%d", this, itEvent->Type));
             if (bLFO2Enabled) fFinalCutoff *= pLFO2->render();  
             if (bLFO3Enabled) finalSynthesisParameters.fFinalPitch *= RTMath::CentsToFreqRatio(pLFO3->render());  
   
             // if filter enabled then update filter coefficients  
             if (SYNTHESIS_MODE_GET_FILTER(SynthesisMode)) {  
                 finalSynthesisParameters.filterLeft.SetParameters(fFinalCutoff, fFinalResonance, pEngine->SampleRate);  
                 finalSynthesisParameters.filterRight.SetParameters(fFinalCutoff, fFinalResonance, pEngine->SampleRate);  
             }  
473    
474              // do we need resampling?          // TODO: The SustainPedal condition could be wrong, maybe the
475              const float __PLUS_ONE_CENT  = 1.000577789506554859250142541782224725466f;          // check should be if this Voice is in release stage or is a
476              const float __MINUS_ONE_CENT = 0.9994225441413807496009516495583113737666f;          // release sample instead. Need to test this in GSt.
477              const bool bResamplingRequired = !(finalSynthesisParameters.fFinalPitch <= __PLUS_ONE_CENT &&          if (itEvent->Param.Note.Key != MIDIKey ||
478                                                 finalSynthesisParameters.fFinalPitch >= __MINUS_ONE_CENT);              !GetGigEngineChannel()->SustainPedal) {
479              SYNTHESIS_MODE_SET_INTERPOLATE(SynthesisMode, bResamplingRequired);              dmsg(4,("Voice %x - kill", this));
   
             // prepare final synthesis parameters structure  
             finalSynthesisParameters.fFinalVolumeLeft  = fFinalVolume * PanLeft;  
             finalSynthesisParameters.fFinalVolumeRight = fFinalVolume * PanRight;  
             finalSynthesisParameters.uiToGo            = iSubFragmentEnd - i;  
   
             // render audio for one subfragment  
             RunSynthesisFunction(SynthesisMode, &finalSynthesisParameters, &loop);  
   
             const double newPos = Pos + (iSubFragmentEnd - i) * finalSynthesisParameters.fFinalPitch;  
   
             // increment envelopes' positions  
             if (EG1.active()) {  
   
                 // if sample has a loop and loop start has been reached in this subfragment, send a special event to EG1 to let it finish the attack hold stage  
                 if (pSample->Loops && Pos <= pSample->LoopStart && pSample->LoopStart < newPos) {  
                     EG1.update(EGADSR::event_hold_end, pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);  
                 }  
480    
481                  EG1.increment(1);              // kill the voice fast
482                  if (!EG1.toStageEndLeft()) EG1.update(EGADSR::event_stage_end, pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);              pEG1->enterFadeOutStage();
             }  
             if (EG2.active()) {  
                 EG2.increment(1);  
                 if (!EG2.toStageEndLeft()) EG2.update(EGADSR::event_stage_end, pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);  
             }  
             EG3.increment(1);  
             if (!EG3.toEndLeft()) EG3.update(); // neutralize envelope coefficient if end reached  
   
             Pos = newPos;  
             i = iSubFragmentEnd;  
483          }          }
484      }      }
485    
486      /**      void Voice::CalculateFadeOutCoeff(float FadeOutTime, float SampleRate) {
487       *  Immediately kill the voice. This method should not be used to kill          EG1.CalculateFadeOutCoeff(FadeOutTime, SampleRate);
      *  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();  
     }  
   
     /**  
      *  Kill the voice in regular sense. Let the voice render audio until  
      *  the kill event actually occured and then fade down the volume level  
      *  very quickly and let the voice die finally. Unlike a normal release  
      *  of a voice, a kill process cannot be cancalled and is therefore  
      *  usually used for voice stealing and key group conflicts.  
      *  
      *  @param itKillEvent - event which caused the voice to be killed  
      */  
     void Voice::Kill(Pool<Event>::Iterator& itKillEvent) {  
         #if CONFIG_DEVMODE  
         if (!itKillEvent) dmsg(1,("gig::Voice::Kill(): ERROR, !itKillEvent !!!\n"));  
         if (itKillEvent && !itKillEvent.isValid()) dmsg(1,("gig::Voice::Kill(): ERROR, itKillEvent invalid !!!\n"));  
         #endif // CONFIG_DEVMODE  
   
         if (itTriggerEvent && itKillEvent->FragmentPos() <= itTriggerEvent->FragmentPos()) return;  
         this->itKillEvent = itKillEvent;  
488      }      }
489    
490  }} // namespace LinuxSampler::gig  }} // namespace LinuxSampler::gig
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