engines/sfz/Voice.cpp

/***************************************************************************
 *                                                                         *
 *   LinuxSampler - modular, streaming capable sampler                     *
 *                                                                         *
 *   Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck   *
 *   Copyright (C) 2005 - 2008 Christian Schoenebeck                       *
 *   Copyright (C) 2009 - 2011 Christian Schoenebeck and Grigor Iliev      *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the Free Software           *
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,                 *
 *   MA  02111-1307  USA                                                   *
 ***************************************************************************/

#include "Voice.h"

#include "Engine.h"
#include "EngineChannel.h"

#define LN_10_DIV_20 0.115129254649702

namespace LinuxSampler { namespace sfz {

    typedef LinuxSampler::VoiceBase<EngineChannel, ::sfz::Region, Sample, DiskThread> SfzVoice;
    Voice::Voice(): SignalRack(this), SfzVoice(&SignalRack) {
        pEngine     = NULL;
    }

    Voice::~Voice() {

    }

    EngineChannel* Voice::GetSfzEngineChannel() {
        return static_cast<EngineChannel*>(pEngineChannel);
    }

    void Voice::SetEngine(LinuxSampler::Engine* pEngine) {
        Engine* engine = static_cast<Engine*>(pEngine);
        this->pEngine     = engine;
        this->pDiskThread = engine->pDiskThread;
        dmsg(6,("Voice::SetEngine()\n"));
    }

    Voice::SampleInfo Voice::GetSampleInfo() {
        SampleInfo si;
        si.SampleRate       = pSample->GetSampleRate();
        si.ChannelCount     = pSample->GetChannelCount();
        si.FrameSize        = pSample->GetFrameSize();
        si.BitDepth         = (pSample->GetFrameSize() / pSample->GetChannelCount()) * 8;
        si.TotalFrameCount  = pSample->GetTotalFrameCount();

        si.HasLoops       = pRegion->HasLoop();
        si.LoopStart      = pRegion->GetLoopStart();
        si.LoopLength     = pRegion->GetLoopEnd() - pRegion->GetLoopStart();
        si.LoopPlayCount  = pRegion->GetLoopCount();
        si.Unpitched      = pRegion->pitch_keytrack == 0;
        return si;
    }

    Voice::RegionInfo Voice::GetRegionInfo() {
        RegionInfo ri;
        ri.UnityNote = pRegion->pitch_keycenter;
        ri.FineTune  = pRegion->tune + pRegion->transpose * 100;
        ri.Pan       = int(pRegion->pan * 0.63); // convert from -100..100 to -64..63
        ri.SampleStartOffset = pRegion->offset ? *(pRegion->offset) : 0;

        ri.EG2PreAttack        = pRegion->fileg_start * 10;
        ri.EG2Attack           = pRegion->fileg_attack;
        //ri.EG2Hold             = pRegion->fileg_hold; // TODO: 
        ri.EG2Decay1           = pRegion->fileg_decay;
        ri.EG2Decay2           = pRegion->fileg_decay;
        ri.EG2Sustain          = pRegion->fileg_sustain * 10;
        ri.EG2InfiniteSustain  = true;
        ri.EG2Release          = pRegion->fileg_release;

        ri.EG3Attack     = pRegion->pitcheg_attack;
        ri.EG3Depth      = 0; // TODO:
        ri.VCFEnabled    = pRegion->cutoff;
        switch (pRegion->fil_type) {
        case ::sfz::LPF_1P:
            ri.VCFType = Filter::vcf_type_1p_lowpass;
            break;
        case ::sfz::LPF_2P:
            ri.VCFType = Filter::vcf_type_2p_lowpass;
            break;
        case ::sfz::LPF_4P:
            ri.VCFType = Filter::vcf_type_4p_lowpass;
            break;
        case ::sfz::LPF_6P:
            ri.VCFType = Filter::vcf_type_6p_lowpass;
            break;
        case ::sfz::HPF_1P:
            ri.VCFType = Filter::vcf_type_1p_highpass;
            break;
        case ::sfz::HPF_2P:
            ri.VCFType = Filter::vcf_type_2p_highpass;
            break;
        case ::sfz::HPF_4P:
            ri.VCFType = Filter::vcf_type_4p_highpass;
            break;
        case ::sfz::HPF_6P:
            ri.VCFType = Filter::vcf_type_6p_highpass;
            break;
        case ::sfz::BPF_1P:
        case ::sfz::BPF_2P:
            ri.VCFType = Filter::vcf_type_2p_bandpass;
            break;
        case ::sfz::BRF_1P:
        case ::sfz::BRF_2P:
            ri.VCFType = Filter::vcf_type_2p_bandreject;
            break;
        case ::sfz::APF_1P:
        case ::sfz::PKF_2P:
        default:
            ri.VCFEnabled = false;
            break;
        }

        ri.VCFResonance  = pRegion->resonance;

        // rt_decay is in dB. Precalculate a suitable value for exp in
        // GetReleaseTriggerAttenuation: -ln(10) / 20 * rt_decay
        ri.ReleaseTriggerDecay = -LN_10_DIV_20 * pRegion->rt_decay;

        return ri;
    }

    Voice::InstrumentInfo Voice::GetInstrumentInfo() {
        InstrumentInfo ii;
        ii.FineTune = 0; // TODO: 
        ii.PitchbendRange = 2; // TODO: 

        return ii;
    }

    double Voice::GetSampleAttenuation() {
        return exp(LN_10_DIV_20 * pRegion->volume);
    }

    double Voice::GetVelocityAttenuation(uint8_t MIDIKeyVelocity) {
        return pRegion->amp_velcurve[MIDIKeyVelocity];
    }

    double Voice::GetVelocityRelease(uint8_t MIDIKeyVelocity) {
        return 127.0 / MIDIKeyVelocity;
    }

    void Voice::ProcessCCEvent(RTList<Event>::Iterator& itEvent) {
        /*if (itEvent->Type == Event::type_control_change && itEvent->Param.CC.Controller) { // if (valid) MIDI control change event
            if (pRegion->AttenuationController.type == ::gig::attenuation_ctrl_t::type_controlchange &&
                itEvent->Param.CC.Controller == pRegion->AttenuationController.controller_number) {
                CrossfadeSmoother.update(AbstractEngine::CrossfadeCurve[CrossfadeAttenuation(itEvent->Param.CC.Value)]);
            }
        }*/ // TODO: ^^^
    }

    void Voice::ProcessCutoffEvent(RTList<Event>::Iterator& itEvent) {
        int ccvalue = itEvent->Param.CC.Value;
        if (VCFCutoffCtrl.value == ccvalue) return;
        VCFCutoffCtrl.value = ccvalue;

        float cutoff = CutoffBase * RTMath::CentsToFreqRatioUnlimited(
            ccvalue / 127.0f * pRegion->cutoff_oncc[VCFCutoffCtrl.controller]);
        if (cutoff > 0.49 * pEngine->SampleRate) cutoff = 0.49 * pEngine->SampleRate;

        VCFCutoffCtrl.fvalue = cutoff; // needed for initialization of fFinalCutoff next time
        fFinalCutoff = cutoff;
    }

    double Voice::CalculateCrossfadeVolume(uint8_t MIDIKeyVelocity) {
        /*float crossfadeVolume;
        switch (pRegion->AttenuationController.type) {
            case ::gig::attenuation_ctrl_t::type_channelaftertouch:
                crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(GetSfzEngineChannel()->ControllerTable[128])];
                break;
            case ::gig::attenuation_ctrl_t::type_velocity:
                crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(MIDIKeyVelocity)];
                break;
            case ::gig::attenuation_ctrl_t::type_controlchange: //FIXME: currently not sample accurate
                crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(GetSfzEngineChannel()->ControllerTable[pRegion->AttenuationController.controller_number])];
                break;
            case ::gig::attenuation_ctrl_t::type_none: // no crossfade defined
            default:
                crossfadeVolume = 1.0f;
        }

        return crossfadeVolume;*/ // TODO: ^^^
        return 1.0f;
    }

    double Voice::GetEG1ControllerValue(uint8_t MIDIKeyVelocity) {
        /*double eg1controllervalue = 0;
        switch (pRegion->EG1Controller.type) {
            case ::gig::eg1_ctrl_t::type_none: // no controller defined
                eg1controllervalue = 0;
                break;
            case ::gig::eg1_ctrl_t::type_channelaftertouch:
                eg1controllervalue = GetSfzEngineChannel()->ControllerTable[128];
                break;
            case ::gig::eg1_ctrl_t::type_velocity:
                eg1controllervalue = MIDIKeyVelocity;
                break;
            case ::gig::eg1_ctrl_t::type_controlchange: // MIDI control change controller
                eg1controllervalue = GetSfzEngineChannel()->ControllerTable[pRegion->EG1Controller.controller_number];
                break;
        }
        if (pRegion->EG1ControllerInvert) eg1controllervalue = 127 - eg1controllervalue;

        return eg1controllervalue;*/ // TODO: ^^^
        return 0;
    }

    Voice::EGInfo Voice::CalculateEG1ControllerInfluence(double eg1ControllerValue) {
        /*EGInfo eg;
        // (eg1attack is different from the others)
        eg.Attack  = (pRegion->EG1ControllerAttackInfluence)  ?
            1 + 0.031 * (double) (pRegion->EG1ControllerAttackInfluence == 1 ?
                                  1 : 1 << pRegion->EG1ControllerAttackInfluence) * eg1ControllerValue : 1.0;
        eg.Decay   = (pRegion->EG1ControllerDecayInfluence)   ? 1 + 0.00775 * (double) (1 << pRegion->EG1ControllerDecayInfluence)   * eg1ControllerValue : 1.0;
        eg.Release = (pRegion->EG1ControllerReleaseInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG1ControllerReleaseInfluence) * eg1ControllerValue : 1.0;

        return eg;*/ // TODO: ^^^
        EGInfo eg;
        eg.Attack = 1.0;
        eg.Decay = 1.0;
        eg.Release = 1.0;
        return eg;
    }

    void Voice::TriggerEG1(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) {

        // TODO: controller modulation

        // first check if there is a v2 EG for amplitude
        for (int i = 0 ; i < pRegion->eg.size() ; i++) {
            if (pRegion->eg[i].amplitude > 0) {
                // TODO: actually use the value of the amplitude parameter
                pEG1 = &EG1;
                EG1.trigger(pRegion->eg[i], sampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE, velocity);
                return;
            }
        }

        // otherwise use the v1 EGADSR
        pEG1 = &EGADSR1;
        EGADSR1.trigger(uint(pRegion->ampeg_start * 10),
                        std::max(0.0, pRegion->ampeg_attack + pRegion->ampeg_vel2attack * velrelease),
                        std::max(0.0, pRegion->ampeg_hold + pRegion->ampeg_vel2hold * velrelease),
                        std::max(0.0, pRegion->ampeg_decay + pRegion->ampeg_vel2decay * velrelease),
                        uint(std::min(std::max(0.0, 10 * (pRegion->ampeg_sustain + pRegion->ampeg_vel2sustain * velrelease)), 1000.0)),
                        std::max(0.0, pRegion->ampeg_release + pRegion->ampeg_vel2release * velrelease),
                        sampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
    }

    double Voice::GetEG2ControllerValue(uint8_t MIDIKeyVelocity) {
        /*double eg2controllervalue = 0;
        switch (pRegion->EG2Controller.type) {
            case ::gig::eg2_ctrl_t::type_none: // no controller defined
                eg2controllervalue = 0;
                break;
            case ::gig::eg2_ctrl_t::type_channelaftertouch:
                eg2controllervalue = GetSfzEngineChannel()->ControllerTable[128];
                break;
            case ::gig::eg2_ctrl_t::type_velocity:
                eg2controllervalue = MIDIKeyVelocity;
                break;
            case ::gig::eg2_ctrl_t::type_controlchange: // MIDI control change controller
                eg2controllervalue = GetSfzEngineChannel()->ControllerTable[pRegion->EG2Controller.controller_number];
                break;
        }
        if (pRegion->EG2ControllerInvert) eg2controllervalue = 127 - eg2controllervalue;

        return eg2controllervalue;*/ // TODO: ^^^
        return 0;
    }

    Voice::EGInfo Voice::CalculateEG2ControllerInfluence(double eg2ControllerValue) {
        /*EGInfo eg;
        eg.Attack  = (pRegion->EG2ControllerAttackInfluence)  ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerAttackInfluence)  * eg2ControllerValue : 1.0;
        eg.Decay   = (pRegion->EG2ControllerDecayInfluence)   ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerDecayInfluence)   * eg2ControllerValue : 1.0;
        eg.Release = (pRegion->EG2ControllerReleaseInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerReleaseInfluence) * eg2ControllerValue : 1.0;

        return eg;*/ // TODO: ^^^
        EGInfo eg;
        eg.Attack = 1.0;
        eg.Decay = 1.0;
        eg.Release = 1.0;
        return eg;
    }

    void Voice::TriggerEG2(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) {

        // TODO: the sfz filter EG should modulate cents, not hertz,
        // so we can't use the EG or EGADSR as it is. Disable for now.

        pEG2 = &EGADSR2;
        EGADSR2.trigger(0,
                        0,
                        false,
                        0,
                        1000,
                        0,
                        sampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
    }

    void Voice::InitLFO1() {
        /*uint16_t lfo1_internal_depth;
        switch (pRegion->LFO1Controller) {
            case ::gig::lfo1_ctrl_internal:
                lfo1_internal_depth  = pRegion->LFO1InternalDepth;
                pLFO1->ExtController = 0; // no external controller
                bLFO1Enabled         = (lfo1_internal_depth > 0);
                break;
            case ::gig::lfo1_ctrl_modwheel:
                lfo1_internal_depth  = 0;
                pLFO1->ExtController = 1; // MIDI controller 1
                bLFO1Enabled         = (pRegion->LFO1ControlDepth > 0);
                break;
            case ::gig::lfo1_ctrl_breath:
                lfo1_internal_depth  = 0;
                pLFO1->ExtController = 2; // MIDI controller 2
                bLFO1Enabled         = (pRegion->LFO1ControlDepth > 0);
                break;
            case ::gig::lfo1_ctrl_internal_modwheel:
                lfo1_internal_depth  = pRegion->LFO1InternalDepth;
                pLFO1->ExtController = 1; // MIDI controller 1
                bLFO1Enabled         = (lfo1_internal_depth > 0 || pRegion->LFO1ControlDepth > 0);
                break;
            case ::gig::lfo1_ctrl_internal_breath:
                lfo1_internal_depth  = pRegion->LFO1InternalDepth;
                pLFO1->ExtController = 2; // MIDI controller 2
                bLFO1Enabled         = (lfo1_internal_depth > 0 || pRegion->LFO1ControlDepth > 0);
                break;
            default:
                lfo1_internal_depth  = 0;
                pLFO1->ExtController = 0; // no external controller
                bLFO1Enabled         = false;
        }
        if (bLFO1Enabled) {
            pLFO1->trigger(pRegion->LFO1Frequency,
                           start_level_min,
                           lfo1_internal_depth,
                           pRegion->LFO1ControlDepth,
                           pRegion->LFO1FlipPhase,
                           pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
            pLFO1->update(pLFO1->ExtController ? GetSfzEngineChannel()->ControllerTable[pLFO1->ExtController] : 0);
        }*/ // TODO: ^^^
        bLFO1Enabled = false;
    }

    void Voice::InitLFO2() {
        /*uint16_t lfo2_internal_depth;
        switch (pRegion->LFO2Controller) {
            case ::gig::lfo2_ctrl_internal:
                lfo2_internal_depth  = pRegion->LFO2InternalDepth;
                pLFO2->ExtController = 0; // no external controller
                bLFO2Enabled         = (lfo2_internal_depth > 0);
                break;
            case ::gig::lfo2_ctrl_modwheel:
                lfo2_internal_depth  = 0;
                pLFO2->ExtController = 1; // MIDI controller 1
                bLFO2Enabled         = (pRegion->LFO2ControlDepth > 0);
                break;
            case ::gig::lfo2_ctrl_foot:
                lfo2_internal_depth  = 0;
                pLFO2->ExtController = 4; // MIDI controller 4
                bLFO2Enabled         = (pRegion->LFO2ControlDepth > 0);
                break;
            case ::gig::lfo2_ctrl_internal_modwheel:
                lfo2_internal_depth  = pRegion->LFO2InternalDepth;
                pLFO2->ExtController = 1; // MIDI controller 1
                bLFO2Enabled         = (lfo2_internal_depth > 0 || pRegion->LFO2ControlDepth > 0);
                break;
            case ::gig::lfo2_ctrl_internal_foot:
                lfo2_internal_depth  = pRegion->LFO2InternalDepth;
                pLFO2->ExtController = 4; // MIDI controller 4
                bLFO2Enabled         = (lfo2_internal_depth > 0 || pRegion->LFO2ControlDepth > 0);
                break;
            default:
                lfo2_internal_depth  = 0;
                pLFO2->ExtController = 0; // no external controller
                bLFO2Enabled         = false;
        }
        if (bLFO2Enabled) {
            pLFO2->trigger(pRegion->LFO2Frequency,
                           start_level_max,
                           lfo2_internal_depth,
                           pRegion->LFO2ControlDepth,
                           pRegion->LFO2FlipPhase,
                           pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
            pLFO2->update(pLFO2->ExtController ? GetSfzEngineChannel()->ControllerTable[pLFO2->ExtController] : 0);
        }*/ // TODO: ^^^
        bLFO2Enabled = false;
    }

    void Voice::InitLFO3() {
        /*uint16_t lfo3_internal_depth;
        switch (pRegion->LFO3Controller) {
            case ::gig::lfo3_ctrl_internal:
                lfo3_internal_depth  = pRegion->LFO3InternalDepth;
                pLFO3->ExtController = 0; // no external controller
                bLFO3Enabled         = (lfo3_internal_depth > 0);
                break;
            case ::gig::lfo3_ctrl_modwheel:
                lfo3_internal_depth  = 0;
                pLFO3->ExtController = 1; // MIDI controller 1
                bLFO3Enabled         = (pRegion->LFO3ControlDepth > 0);
                break;
            case ::gig::lfo3_ctrl_aftertouch:
                lfo3_internal_depth  = 0;
                pLFO3->ExtController = 128;
                bLFO3Enabled         = true;
                break;
            case ::gig::lfo3_ctrl_internal_modwheel:
                lfo3_internal_depth  = pRegion->LFO3InternalDepth;
                pLFO3->ExtController = 1; // MIDI controller 1
                bLFO3Enabled         = (lfo3_internal_depth > 0 || pRegion->LFO3ControlDepth > 0);
                break;
            case ::gig::lfo3_ctrl_internal_aftertouch:
                lfo3_internal_depth  = pRegion->LFO3InternalDepth;
                pLFO1->ExtController = 128;
                bLFO3Enabled         = (lfo3_internal_depth > 0 || pRegion->LFO3ControlDepth > 0);
                break;
            default:
                lfo3_internal_depth  = 0;
                pLFO3->ExtController = 0; // no external controller
                bLFO3Enabled         = false;
        }
        if (bLFO3Enabled) {
            pLFO3->trigger(pRegion->LFO3Frequency,
                           start_level_mid,
                           lfo3_internal_depth,
                           pRegion->LFO3ControlDepth,
                           false,
                           pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
            pLFO3->update(pLFO3->ExtController ? GetSfzEngineChannel()->ControllerTable[pLFO3->ExtController] : 0);
        }*/ // TODO: ^^^
        bLFO3Enabled = false;
    }

    float Voice::CalculateCutoffBase(uint8_t MIDIKeyVelocity) {
        float cutoff = *pRegion->cutoff;
        cutoff *= RTMath::CentsToFreqRatioUnlimited(
            MIDIKeyVelocity / 127.0f * pRegion->fil_veltrack +
            (MIDIKey - pRegion->fil_keycenter) * pRegion->fil_keytrack);
        return cutoff;
    }

    float Voice::CalculateFinalCutoff(float cutoffBase) {
        float cutoff;
        if (VCFCutoffCtrl.controller) {
            int ccvalue = GetSfzEngineChannel()->ControllerTable[VCFCutoffCtrl.controller];
            cutoff = CutoffBase * RTMath::CentsToFreqRatioUnlimited(
                ccvalue / 127.0f * pRegion->cutoff_oncc[VCFCutoffCtrl.controller]);
        } else {
            cutoff = cutoffBase;
        }
        if (cutoff > 0.49 * pEngine->SampleRate) cutoff = 0.49 * pEngine->SampleRate;
        return cutoff;
    }

    uint8_t Voice::GetVCFCutoffCtrl() {
        // TODO: the sfz format allows several CC for the same
        // modulation destination. The Voice interface needs to be
        // changed to support that.
        if (pRegion->cutoff_cc) return pRegion->cutoff_cc;
        else if (pRegion->cutoff_chanaft) return 128;
        return 0;
    }

    uint8_t Voice::GetVCFResonanceCtrl() {
        /*uint8_t ctrl;
        switch (pRegion->VCFResonanceController) {
            case ::gig::vcf_res_ctrl_genpurpose3:
                ctrl = 18;
                break;
            case ::gig::vcf_res_ctrl_genpurpose4:
                ctrl = 19;
                break;
            case ::gig::vcf_res_ctrl_genpurpose5:
                ctrl = 80;
                break;
            case ::gig::vcf_res_ctrl_genpurpose6:
                ctrl = 81;
                break;
            case ::gig::vcf_res_ctrl_none:
            default:
                ctrl = 0;
        }

        return ctrl;*/ // TODO: ^^^
        return 0;
    }

    float Voice::GetReleaseTriggerAttenuation(float noteLength) {
        // pow(10, -rt_decay * noteLength / 20):
        return expf(RgnInfo.ReleaseTriggerDecay * noteLength);
    }

    void Voice::ProcessGroupEvent(RTList<Event>::Iterator& itEvent) {
        dmsg(4,("Voice %x processGroupEvents event type=%d", this, itEvent->Type));
        if (itEvent->Type == Event::type_control_change ||
            (Type & Voice::type_controller_triggered) ||
            itEvent->Param.Note.Key != MIDIKey) {
            dmsg(4,("Voice %x - kill", this));
            if (pRegion->off_mode == ::sfz::OFF_NORMAL) {
                // turn off the voice by entering release envelope stage
                EnterReleaseStage();
            } else {
                // kill the voice fast
                SignalRack.EnterFadeOutStage();
            }
        }
    }
    
    void Voice::SetSampleStartOffset() {
        if (DiskVoice && RgnInfo.SampleStartOffset > pSample->MaxOffset) {
            // The offset is applied to the RAM buffer
            finalSynthesisParameters.dPos = 0;
            Pos = 0;
        } else {
            finalSynthesisParameters.dPos = RgnInfo.SampleStartOffset; // offset where we should start playback of sample
            Pos = RgnInfo.SampleStartOffset;
        }
    }

}} // namespace LinuxSampler::sfz
1	iliev	2012	/***************************************************************************
2			* *
3			* LinuxSampler - modular, streaming capable sampler *
4			* *
5			* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6	persson	2055	* Copyright (C) 2005 - 2008 Christian Schoenebeck *
7	persson	2175	* Copyright (C) 2009 - 2011 Christian Schoenebeck and Grigor Iliev *
8	iliev	2012	* *
9			* 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 *
11			* the Free Software Foundation; either version 2 of the License, or *
12			* (at your option) any later version. *
13			* *
14			* This program is distributed in the hope that it will be useful, *
15			* but WITHOUT ANY WARRANTY; without even the implied warranty of *
16			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
17			* GNU General Public License for more details. *
18			* *
19			* You should have received a copy of the GNU General Public License *
20			* along with this program; if not, write to the Free Software *
21			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
22			* MA 02111-1307 USA *
23			***************************************************************************/
24
25	iliev	2015	#include "Voice.h"
26
27	iliev	2012	#include "Engine.h"
28			#include "EngineChannel.h"
29
30	persson	2072	#define LN_10_DIV_20 0.115129254649702
31
32	iliev	2012	namespace LinuxSampler { namespace sfz {
33
34	iliev	2218	typedef LinuxSampler::VoiceBase<EngineChannel, ::sfz::Region, Sample, DiskThread> SfzVoice;
35			Voice::Voice(): SignalRack(this), SfzVoice(&SignalRack) {
36	iliev	2012	pEngine = NULL;
37			}
38
39			Voice::~Voice() {
40	iliev	2015
41	iliev	2012	}
42
43	iliev	2015	EngineChannel* Voice::GetSfzEngineChannel() {
44			return static_cast<EngineChannel*>(pEngineChannel);
45			}
46
47	iliev	2012	void Voice::SetEngine(LinuxSampler::Engine* pEngine) {
48			Engine* engine = static_cast<Engine*>(pEngine);
49			this->pEngine = engine;
50			this->pDiskThread = engine->pDiskThread;
51			dmsg(6,("Voice::SetEngine()\n"));
52			}
53
54	iliev	2015	Voice::SampleInfo Voice::GetSampleInfo() {
55			SampleInfo si;
56			si.SampleRate = pSample->GetSampleRate();
57			si.ChannelCount = pSample->GetChannelCount();
58			si.FrameSize = pSample->GetFrameSize();
59			si.BitDepth = (pSample->GetFrameSize() / pSample->GetChannelCount()) * 8;
60			si.TotalFrameCount = pSample->GetTotalFrameCount();
61	iliev	2012
62	iliev	2021	si.HasLoops = pRegion->HasLoop();
63			si.LoopStart = pRegion->GetLoopStart();
64			si.LoopLength = pRegion->GetLoopEnd() - pRegion->GetLoopStart();
65			si.LoopPlayCount = pRegion->GetLoopCount();
66			si.Unpitched = pRegion->pitch_keytrack == 0;
67	iliev	2015	return si;
68			}
69	iliev	2012
70	iliev	2015	Voice::RegionInfo Voice::GetRegionInfo() {
71			RegionInfo ri;
72	iliev	2018	ri.UnityNote = pRegion->pitch_keycenter;
73	persson	2086	ri.FineTune = pRegion->tune + pRegion->transpose * 100;
74	persson	2045	ri.Pan = int(pRegion->pan * 0.63); // convert from -100..100 to -64..63
75	iliev	2216	ri.SampleStartOffset = pRegion->offset ? *(pRegion->offset) : 0;
76	iliev	2012
77	persson	2055	ri.EG2PreAttack = pRegion->fileg_start * 10;
78	iliev	2018	ri.EG2Attack = pRegion->fileg_attack;
79			//ri.EG2Hold = pRegion->fileg_hold; // TODO:
80			ri.EG2Decay1 = pRegion->fileg_decay;
81			ri.EG2Decay2 = pRegion->fileg_decay;
82	persson	2055	ri.EG2Sustain = pRegion->fileg_sustain * 10;
83	iliev	2015	ri.EG2InfiniteSustain = true;
84	iliev	2018	ri.EG2Release = pRegion->fileg_release;
85	iliev	2012
86	iliev	2018	ri.EG3Attack = pRegion->pitcheg_attack;
87	iliev	2015	ri.EG3Depth = 0; // TODO:
88	persson	2175	ri.VCFEnabled = pRegion->cutoff;
89			switch (pRegion->fil_type) {
90			case ::sfz::LPF_1P:
91			ri.VCFType = Filter::vcf_type_1p_lowpass;
92			break;
93			case ::sfz::LPF_2P:
94			ri.VCFType = Filter::vcf_type_2p_lowpass;
95			break;
96			case ::sfz::LPF_4P:
97			ri.VCFType = Filter::vcf_type_4p_lowpass;
98			break;
99			case ::sfz::LPF_6P:
100			ri.VCFType = Filter::vcf_type_6p_lowpass;
101			break;
102			case ::sfz::HPF_1P:
103			ri.VCFType = Filter::vcf_type_1p_highpass;
104			break;
105			case ::sfz::HPF_2P:
106			ri.VCFType = Filter::vcf_type_2p_highpass;
107			break;
108			case ::sfz::HPF_4P:
109			ri.VCFType = Filter::vcf_type_4p_highpass;
110			break;
111			case ::sfz::HPF_6P:
112			ri.VCFType = Filter::vcf_type_6p_highpass;
113			break;
114			case ::sfz::BPF_1P:
115			case ::sfz::BPF_2P:
116			ri.VCFType = Filter::vcf_type_2p_bandpass;
117			break;
118			case ::sfz::BRF_1P:
119			case ::sfz::BRF_2P:
120			ri.VCFType = Filter::vcf_type_2p_bandreject;
121			break;
122			case ::sfz::APF_1P:
123			case ::sfz::PKF_2P:
124			default:
125			ri.VCFEnabled = false;
126			break;
127			}
128	iliev	2012
129	persson	2175	ri.VCFResonance = pRegion->resonance;
130
131	persson	2061	// rt_decay is in dB. Precalculate a suitable value for exp in
132			// GetReleaseTriggerAttenuation: -ln(10) / 20 * rt_decay
133	persson	2072	ri.ReleaseTriggerDecay = -LN_10_DIV_20 * pRegion->rt_decay;
134	iliev	2012
135	iliev	2015	return ri;
136			}
137	iliev	2012
138	iliev	2015	Voice::InstrumentInfo Voice::GetInstrumentInfo() {
139			InstrumentInfo ii;
140			ii.FineTune = 0; // TODO:
141			ii.PitchbendRange = 2; // TODO:
142
143			return ii;
144			}
145
146			double Voice::GetSampleAttenuation() {
147	persson	2072	return exp(LN_10_DIV_20 * pRegion->volume);
148	iliev	2015	}
149
150			double Voice::GetVelocityAttenuation(uint8_t MIDIKeyVelocity) {
151	persson	2082	return pRegion->amp_velcurve[MIDIKeyVelocity];
152	iliev	2015	}
153
154			double Voice::GetVelocityRelease(uint8_t MIDIKeyVelocity) {
155	persson	2176	return 127.0 / MIDIKeyVelocity;
156	iliev	2015	}
157
158			void Voice::ProcessCCEvent(RTList<Event>::Iterator& itEvent) {
159			/*if (itEvent->Type == Event::type_control_change && itEvent->Param.CC.Controller) { // if (valid) MIDI control change event
160			if (pRegion->AttenuationController.type == ::gig::attenuation_ctrl_t::type_controlchange &&
161			itEvent->Param.CC.Controller == pRegion->AttenuationController.controller_number) {
162			CrossfadeSmoother.update(AbstractEngine::CrossfadeCurve[CrossfadeAttenuation(itEvent->Param.CC.Value)]);
163			}
164			}*/ // TODO: ^^^
165			}
166
167			void Voice::ProcessCutoffEvent(RTList<Event>::Iterator& itEvent) {
168	persson	2175	int ccvalue = itEvent->Param.CC.Value;
169	iliev	2015	if (VCFCutoffCtrl.value == ccvalue) return;
170	persson	2175	VCFCutoffCtrl.value = ccvalue;
171	iliev	2015
172	persson	2175	float cutoff = CutoffBase * RTMath::CentsToFreqRatioUnlimited(
173			ccvalue / 127.0f * pRegion->cutoff_oncc[VCFCutoffCtrl.controller]);
174			if (cutoff > 0.49 * pEngine->SampleRate) cutoff = 0.49 * pEngine->SampleRate;
175
176	iliev	2015	VCFCutoffCtrl.fvalue = cutoff; // needed for initialization of fFinalCutoff next time
177	persson	2175	fFinalCutoff = cutoff;
178	iliev	2015	}
179
180			double Voice::CalculateCrossfadeVolume(uint8_t MIDIKeyVelocity) {
181	iliev	2012	/*float crossfadeVolume;
182			switch (pRegion->AttenuationController.type) {
183			case ::gig::attenuation_ctrl_t::type_channelaftertouch:
184	iliev	2015	crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(GetSfzEngineChannel()->ControllerTable[128])];
185	iliev	2012	break;
186			case ::gig::attenuation_ctrl_t::type_velocity:
187	iliev	2015	crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(MIDIKeyVelocity)];
188	iliev	2012	break;
189			case ::gig::attenuation_ctrl_t::type_controlchange: //FIXME: currently not sample accurate
190	iliev	2015	crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(GetSfzEngineChannel()->ControllerTable[pRegion->AttenuationController.controller_number])];
191	iliev	2012	break;
192			case ::gig::attenuation_ctrl_t::type_none: // no crossfade defined
193			default:
194			crossfadeVolume = 1.0f;
195			}
196
197	iliev	2015	return crossfadeVolume;*/ // TODO: ^^^
198			return 1.0f;
199			}
200	iliev	2012
201	iliev	2015	double Voice::GetEG1ControllerValue(uint8_t MIDIKeyVelocity) {
202			/*double eg1controllervalue = 0;
203			switch (pRegion->EG1Controller.type) {
204			case ::gig::eg1_ctrl_t::type_none: // no controller defined
205			eg1controllervalue = 0;
206			break;
207			case ::gig::eg1_ctrl_t::type_channelaftertouch:
208			eg1controllervalue = GetSfzEngineChannel()->ControllerTable[128];
209			break;
210			case ::gig::eg1_ctrl_t::type_velocity:
211			eg1controllervalue = MIDIKeyVelocity;
212			break;
213			case ::gig::eg1_ctrl_t::type_controlchange: // MIDI control change controller
214			eg1controllervalue = GetSfzEngineChannel()->ControllerTable[pRegion->EG1Controller.controller_number];
215			break;
216	iliev	2012	}
217	iliev	2015	if (pRegion->EG1ControllerInvert) eg1controllervalue = 127 - eg1controllervalue;
218	iliev	2012
219	iliev	2015	return eg1controllervalue;*/ // TODO: ^^^
220			return 0;
221			}
222	iliev	2012
223	iliev	2015	Voice::EGInfo Voice::CalculateEG1ControllerInfluence(double eg1ControllerValue) {
224			/*EGInfo eg;
225			// (eg1attack is different from the others)
226			eg.Attack = (pRegion->EG1ControllerAttackInfluence) ?
227			1 + 0.031 * (double) (pRegion->EG1ControllerAttackInfluence == 1 ?
228			1 : 1 << pRegion->EG1ControllerAttackInfluence) * eg1ControllerValue : 1.0;
229			eg.Decay = (pRegion->EG1ControllerDecayInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG1ControllerDecayInfluence) * eg1ControllerValue : 1.0;
230			eg.Release = (pRegion->EG1ControllerReleaseInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG1ControllerReleaseInfluence) * eg1ControllerValue : 1.0;
231	iliev	2012
232	iliev	2015	return eg;*/ // TODO: ^^^
233			EGInfo eg;
234			eg.Attack = 1.0;
235			eg.Decay = 1.0;
236			eg.Release = 1.0;
237			return eg;
238			}
239	iliev	2012
240	persson	2055	void Voice::TriggerEG1(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) {
241
242			// TODO: controller modulation
243
244			// first check if there is a v2 EG for amplitude
245			for (int i = 0 ; i < pRegion->eg.size() ; i++) {
246			if (pRegion->eg[i].amplitude > 0) {
247			// TODO: actually use the value of the amplitude parameter
248			pEG1 = &EG1;
249			EG1.trigger(pRegion->eg[i], sampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE, velocity);
250			return;
251			}
252			}
253
254			// otherwise use the v1 EGADSR
255			pEG1 = &EGADSR1;
256	persson	2203	EGADSR1.trigger(uint(pRegion->ampeg_start * 10),
257			std::max(0.0, pRegion->ampeg_attack + pRegion->ampeg_vel2attack * velrelease),
258			std::max(0.0, pRegion->ampeg_hold + pRegion->ampeg_vel2hold * velrelease),
259			std::max(0.0, pRegion->ampeg_decay + pRegion->ampeg_vel2decay * velrelease),
260			uint(std::min(std::max(0.0, 10 * (pRegion->ampeg_sustain + pRegion->ampeg_vel2sustain * velrelease)), 1000.0)),
261			std::max(0.0, pRegion->ampeg_release + pRegion->ampeg_vel2release * velrelease),
262	persson	2055	sampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
263	persson	2176	}
264	persson	2055
265	persson	2176	double Voice::GetEG2ControllerValue(uint8_t MIDIKeyVelocity) {
266	iliev	2015	/*double eg2controllervalue = 0;
267			switch (pRegion->EG2Controller.type) {
268			case ::gig::eg2_ctrl_t::type_none: // no controller defined
269			eg2controllervalue = 0;
270			break;
271			case ::gig::eg2_ctrl_t::type_channelaftertouch:
272			eg2controllervalue = GetSfzEngineChannel()->ControllerTable[128];
273			break;
274			case ::gig::eg2_ctrl_t::type_velocity:
275			eg2controllervalue = MIDIKeyVelocity;
276			break;
277			case ::gig::eg2_ctrl_t::type_controlchange: // MIDI control change controller
278			eg2controllervalue = GetSfzEngineChannel()->ControllerTable[pRegion->EG2Controller.controller_number];
279			break;
280	iliev	2012	}
281	iliev	2015	if (pRegion->EG2ControllerInvert) eg2controllervalue = 127 - eg2controllervalue;
282	iliev	2012
283	iliev	2015	return eg2controllervalue;*/ // TODO: ^^^
284			return 0;
285			}
286	iliev	2012
287	iliev	2015	Voice::EGInfo Voice::CalculateEG2ControllerInfluence(double eg2ControllerValue) {
288			/*EGInfo eg;
289			eg.Attack = (pRegion->EG2ControllerAttackInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerAttackInfluence) * eg2ControllerValue : 1.0;
290			eg.Decay = (pRegion->EG2ControllerDecayInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerDecayInfluence) * eg2ControllerValue : 1.0;
291			eg.Release = (pRegion->EG2ControllerReleaseInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerReleaseInfluence) * eg2ControllerValue : 1.0;
292	iliev	2012
293	iliev	2015	return eg;*/ // TODO: ^^^
294			EGInfo eg;
295			eg.Attack = 1.0;
296			eg.Decay = 1.0;
297			eg.Release = 1.0;
298			return eg;
299			}
300	iliev	2012
301	persson	2175	void Voice::TriggerEG2(const EGInfo& egInfo, double velrelease, double velocityAttenuation, uint sampleRate, uint8_t velocity) {
302
303			// TODO: the sfz filter EG should modulate cents, not hertz,
304			// so we can't use the EG or EGADSR as it is. Disable for now.
305
306			pEG2 = &EGADSR2;
307			EGADSR2.trigger(0,
308			0,
309			false,
310			0,
311			1000,
312			0,
313			sampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
314			}
315
316	iliev	2015	void Voice::InitLFO1() {
317			/*uint16_t lfo1_internal_depth;
318			switch (pRegion->LFO1Controller) {
319			case ::gig::lfo1_ctrl_internal:
320			lfo1_internal_depth = pRegion->LFO1InternalDepth;
321			pLFO1->ExtController = 0; // no external controller
322			bLFO1Enabled = (lfo1_internal_depth > 0);
323			break;
324			case ::gig::lfo1_ctrl_modwheel:
325			lfo1_internal_depth = 0;
326			pLFO1->ExtController = 1; // MIDI controller 1
327			bLFO1Enabled = (pRegion->LFO1ControlDepth > 0);
328			break;
329			case ::gig::lfo1_ctrl_breath:
330			lfo1_internal_depth = 0;
331			pLFO1->ExtController = 2; // MIDI controller 2
332			bLFO1Enabled = (pRegion->LFO1ControlDepth > 0);
333			break;
334			case ::gig::lfo1_ctrl_internal_modwheel:
335			lfo1_internal_depth = pRegion->LFO1InternalDepth;
336			pLFO1->ExtController = 1; // MIDI controller 1
337			bLFO1Enabled = (lfo1_internal_depth > 0 \|\| pRegion->LFO1ControlDepth > 0);
338			break;
339			case ::gig::lfo1_ctrl_internal_breath:
340			lfo1_internal_depth = pRegion->LFO1InternalDepth;
341			pLFO1->ExtController = 2; // MIDI controller 2
342			bLFO1Enabled = (lfo1_internal_depth > 0 \|\| pRegion->LFO1ControlDepth > 0);
343			break;
344			default:
345			lfo1_internal_depth = 0;
346			pLFO1->ExtController = 0; // no external controller
347			bLFO1Enabled = false;
348	iliev	2012	}
349	iliev	2015	if (bLFO1Enabled) {
350			pLFO1->trigger(pRegion->LFO1Frequency,
351			start_level_min,
352			lfo1_internal_depth,
353			pRegion->LFO1ControlDepth,
354			pRegion->LFO1FlipPhase,
355			pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
356			pLFO1->update(pLFO1->ExtController ? GetSfzEngineChannel()->ControllerTable[pLFO1->ExtController] : 0);
357	iliev	2012	}*/ // TODO: ^^^
358	iliev	2015	bLFO1Enabled = false;
359			}
360	iliev	2012
361	iliev	2015	void Voice::InitLFO2() {
362			/*uint16_t lfo2_internal_depth;
363			switch (pRegion->LFO2Controller) {
364			case ::gig::lfo2_ctrl_internal:
365			lfo2_internal_depth = pRegion->LFO2InternalDepth;
366			pLFO2->ExtController = 0; // no external controller
367			bLFO2Enabled = (lfo2_internal_depth > 0);
368			break;
369			case ::gig::lfo2_ctrl_modwheel:
370			lfo2_internal_depth = 0;
371			pLFO2->ExtController = 1; // MIDI controller 1
372			bLFO2Enabled = (pRegion->LFO2ControlDepth > 0);
373			break;
374			case ::gig::lfo2_ctrl_foot:
375			lfo2_internal_depth = 0;
376			pLFO2->ExtController = 4; // MIDI controller 4
377			bLFO2Enabled = (pRegion->LFO2ControlDepth > 0);
378			break;
379			case ::gig::lfo2_ctrl_internal_modwheel:
380			lfo2_internal_depth = pRegion->LFO2InternalDepth;
381			pLFO2->ExtController = 1; // MIDI controller 1
382			bLFO2Enabled = (lfo2_internal_depth > 0 \|\| pRegion->LFO2ControlDepth > 0);
383			break;
384			case ::gig::lfo2_ctrl_internal_foot:
385			lfo2_internal_depth = pRegion->LFO2InternalDepth;
386			pLFO2->ExtController = 4; // MIDI controller 4
387			bLFO2Enabled = (lfo2_internal_depth > 0 \|\| pRegion->LFO2ControlDepth > 0);
388			break;
389			default:
390			lfo2_internal_depth = 0;
391			pLFO2->ExtController = 0; // no external controller
392			bLFO2Enabled = false;
393	iliev	2012	}
394	iliev	2015	if (bLFO2Enabled) {
395			pLFO2->trigger(pRegion->LFO2Frequency,
396			start_level_max,
397			lfo2_internal_depth,
398			pRegion->LFO2ControlDepth,
399			pRegion->LFO2FlipPhase,
400			pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
401			pLFO2->update(pLFO2->ExtController ? GetSfzEngineChannel()->ControllerTable[pLFO2->ExtController] : 0);
402	iliev	2012	}*/ // TODO: ^^^
403	iliev	2015	bLFO2Enabled = false;
404	iliev	2012	}
405
406	iliev	2015	void Voice::InitLFO3() {
407			/*uint16_t lfo3_internal_depth;
408			switch (pRegion->LFO3Controller) {
409			case ::gig::lfo3_ctrl_internal:
410			lfo3_internal_depth = pRegion->LFO3InternalDepth;
411			pLFO3->ExtController = 0; // no external controller
412			bLFO3Enabled = (lfo3_internal_depth > 0);
413	iliev	2012	break;
414	iliev	2015	case ::gig::lfo3_ctrl_modwheel:
415			lfo3_internal_depth = 0;
416			pLFO3->ExtController = 1; // MIDI controller 1
417			bLFO3Enabled = (pRegion->LFO3ControlDepth > 0);
418	iliev	2012	break;
419	iliev	2015	case ::gig::lfo3_ctrl_aftertouch:
420			lfo3_internal_depth = 0;
421			pLFO3->ExtController = 128;
422			bLFO3Enabled = true;
423	iliev	2012	break;
424	iliev	2015	case ::gig::lfo3_ctrl_internal_modwheel:
425			lfo3_internal_depth = pRegion->LFO3InternalDepth;
426			pLFO3->ExtController = 1; // MIDI controller 1
427			bLFO3Enabled = (lfo3_internal_depth > 0 \|\| pRegion->LFO3ControlDepth > 0);
428			break;
429			case ::gig::lfo3_ctrl_internal_aftertouch:
430			lfo3_internal_depth = pRegion->LFO3InternalDepth;
431			pLFO1->ExtController = 128;
432			bLFO3Enabled = (lfo3_internal_depth > 0 \|\| pRegion->LFO3ControlDepth > 0);
433			break;
434			default:
435			lfo3_internal_depth = 0;
436			pLFO3->ExtController = 0; // no external controller
437			bLFO3Enabled = false;
438	iliev	2012	}
439	iliev	2015	if (bLFO3Enabled) {
440			pLFO3->trigger(pRegion->LFO3Frequency,
441			start_level_mid,
442			lfo3_internal_depth,
443			pRegion->LFO3ControlDepth,
444			false,
445			pEngine->SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE);
446			pLFO3->update(pLFO3->ExtController ? GetSfzEngineChannel()->ControllerTable[pLFO3->ExtController] : 0);
447			}*/ // TODO: ^^^
448			bLFO3Enabled = false;
449	iliev	2012	}
450
451	iliev	2015	float Voice::CalculateCutoffBase(uint8_t MIDIKeyVelocity) {
452	persson	2175	float cutoff = *pRegion->cutoff;
453			cutoff *= RTMath::CentsToFreqRatioUnlimited(
454			MIDIKeyVelocity / 127.0f * pRegion->fil_veltrack +
455			(MIDIKey - pRegion->fil_keycenter) * pRegion->fil_keytrack);
456			return cutoff;
457	iliev	2012	}
458
459	iliev	2015	float Voice::CalculateFinalCutoff(float cutoffBase) {
460	persson	2175	float cutoff;
461	iliev	2015	if (VCFCutoffCtrl.controller) {
462	persson	2175	int ccvalue = GetSfzEngineChannel()->ControllerTable[VCFCutoffCtrl.controller];
463			cutoff = CutoffBase * RTMath::CentsToFreqRatioUnlimited(
464			ccvalue / 127.0f * pRegion->cutoff_oncc[VCFCutoffCtrl.controller]);
465			} else {
466			cutoff = cutoffBase;
467	iliev	2012	}
468	persson	2175	if (cutoff > 0.49 * pEngine->SampleRate) cutoff = 0.49 * pEngine->SampleRate;
469			return cutoff;
470	iliev	2012	}
471
472	iliev	2015	uint8_t Voice::GetVCFCutoffCtrl() {
473	persson	2175	// TODO: the sfz format allows several CC for the same
474			// modulation destination. The Voice interface needs to be
475			// changed to support that.
476			if (pRegion->cutoff_cc) return pRegion->cutoff_cc;
477			else if (pRegion->cutoff_chanaft) return 128;
478	iliev	2015	return 0;
479	iliev	2012	}
480
481	iliev	2015	uint8_t Voice::GetVCFResonanceCtrl() {
482			/*uint8_t ctrl;
483			switch (pRegion->VCFResonanceController) {
484			case ::gig::vcf_res_ctrl_genpurpose3:
485			ctrl = 18;
486			break;
487			case ::gig::vcf_res_ctrl_genpurpose4:
488			ctrl = 19;
489			break;
490			case ::gig::vcf_res_ctrl_genpurpose5:
491			ctrl = 80;
492			break;
493			case ::gig::vcf_res_ctrl_genpurpose6:
494			ctrl = 81;
495			break;
496			case ::gig::vcf_res_ctrl_none:
497			default:
498			ctrl = 0;
499	iliev	2012	}
500
501	iliev	2015	return ctrl;*/ // TODO: ^^^
502			return 0;
503	iliev	2012	}
504
505	persson	2061	float Voice::GetReleaseTriggerAttenuation(float noteLength) {
506			// pow(10, -rt_decay * noteLength / 20):
507			return expf(RgnInfo.ReleaseTriggerDecay * noteLength);
508			}
509
510	persson	2114	void Voice::ProcessGroupEvent(RTList<Event>::Iterator& itEvent) {
511			dmsg(4,("Voice %x processGroupEvents event type=%d", this, itEvent->Type));
512	persson	2115	if (itEvent->Type == Event::type_control_change \|\|
513			(Type & Voice::type_controller_triggered) \|\|
514			itEvent->Param.Note.Key != MIDIKey) {
515	persson	2114	dmsg(4,("Voice %x - kill", this));
516			if (pRegion->off_mode == ::sfz::OFF_NORMAL) {
517			// turn off the voice by entering release envelope stage
518			EnterReleaseStage();
519			} else {
520			// kill the voice fast
521	iliev	2218	SignalRack.EnterFadeOutStage();
522	persson	2114	}
523			}
524			}
525	iliev	2216
526			void Voice::SetSampleStartOffset() {
527			if (DiskVoice && RgnInfo.SampleStartOffset > pSample->MaxOffset) {
528			// The offset is applied to the RAM buffer
529			finalSynthesisParameters.dPos = 0;
530			Pos = 0;
531			} else {
532			finalSynthesisParameters.dPos = RgnInfo.SampleStartOffset; // offset where we should start playback of sample
533			Pos = RgnInfo.SampleStartOffset;
534			}
535			}
536	persson	2114
537	iliev	2012	}} // namespace LinuxSampler::sfz