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;
    }

    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;
    }

    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	/***************************************************************************
2	* *
3	* LinuxSampler - modular, streaming capable sampler *
4	* *
5	* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck *
6	* Copyright (C) 2005 - 2008 Christian Schoenebeck *
7	* Copyright (C) 2009 - 2011 Christian Schoenebeck and Grigor Iliev *
8	* *
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	#include "Voice.h"
26
27	#include "Engine.h"
28	#include "EngineChannel.h"
29
30	#define LN_10_DIV_20 0.115129254649702
31
32	namespace LinuxSampler { namespace sfz {
33
34	typedef LinuxSampler::VoiceBase<EngineChannel, ::sfz::Region, Sample, DiskThread> SfzVoice;
35	Voice::Voice(): SignalRack(this), SfzVoice(&SignalRack) {
36	pEngine = NULL;
37	}
38
39	Voice::~Voice() {
40
41	}
42
43	EngineChannel* Voice::GetSfzEngineChannel() {
44	return static_cast<EngineChannel*>(pEngineChannel);
45	}
46
47	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	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
62	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	return si;
68	}
69
70	Voice::RegionInfo Voice::GetRegionInfo() {
71	RegionInfo ri;
72	ri.UnityNote = pRegion->pitch_keycenter;
73	ri.FineTune = pRegion->tune + pRegion->transpose * 100;
74	ri.Pan = int(pRegion->pan * 0.63); // convert from -100..100 to -64..63
75	ri.SampleStartOffset = pRegion->offset ? *(pRegion->offset) : 0;
76
77	ri.EG2PreAttack = pRegion->fileg_start * 10;
78	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	ri.EG2Sustain = pRegion->fileg_sustain * 10;
83	ri.EG2InfiniteSustain = true;
84	ri.EG2Release = pRegion->fileg_release;
85
86	ri.EG3Attack = pRegion->pitcheg_attack;
87	ri.EG3Depth = 0; // TODO:
88	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
129	ri.VCFResonance = pRegion->resonance;
130
131	// rt_decay is in dB. Precalculate a suitable value for exp in
132	// GetReleaseTriggerAttenuation: -ln(10) / 20 * rt_decay
133	ri.ReleaseTriggerDecay = -LN_10_DIV_20 * pRegion->rt_decay;
134
135	return ri;
136	}
137
138	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	return exp(LN_10_DIV_20 * pRegion->volume);
148	}
149
150	double Voice::GetVelocityAttenuation(uint8_t MIDIKeyVelocity) {
151	return pRegion->amp_velcurve[MIDIKeyVelocity];
152	}
153
154	double Voice::GetVelocityRelease(uint8_t MIDIKeyVelocity) {
155	return 127.0 / MIDIKeyVelocity;
156	}
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	int ccvalue = itEvent->Param.CC.Value;
169	if (VCFCutoffCtrl.value == ccvalue) return;
170	VCFCutoffCtrl.value = ccvalue;
171
172	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	VCFCutoffCtrl.fvalue = cutoff; // needed for initialization of fFinalCutoff next time
177	fFinalCutoff = cutoff;
178	}
179
180	double Voice::CalculateCrossfadeVolume(uint8_t MIDIKeyVelocity) {
181	/*float crossfadeVolume;
182	switch (pRegion->AttenuationController.type) {
183	case ::gig::attenuation_ctrl_t::type_channelaftertouch:
184	crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(GetSfzEngineChannel()->ControllerTable[128])];
185	break;
186	case ::gig::attenuation_ctrl_t::type_velocity:
187	crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(MIDIKeyVelocity)];
188	break;
189	case ::gig::attenuation_ctrl_t::type_controlchange: //FIXME: currently not sample accurate
190	crossfadeVolume = Engine::CrossfadeCurve[CrossfadeAttenuation(GetSfzEngineChannel()->ControllerTable[pRegion->AttenuationController.controller_number])];
191	break;
192	case ::gig::attenuation_ctrl_t::type_none: // no crossfade defined
193	default:
194	crossfadeVolume = 1.0f;
195	}
196
197	return crossfadeVolume;*/ // TODO: ^^^
198	return 1.0f;
199	}
200
201	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	}
217	if (pRegion->EG1ControllerInvert) eg1controllervalue = 127 - eg1controllervalue;
218
219	return eg1controllervalue;*/ // TODO: ^^^
220	return 0;
221	}
222
223	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
232	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
240	double Voice::GetEG2ControllerValue(uint8_t MIDIKeyVelocity) {
241	/*double eg2controllervalue = 0;
242	switch (pRegion->EG2Controller.type) {
243	case ::gig::eg2_ctrl_t::type_none: // no controller defined
244	eg2controllervalue = 0;
245	break;
246	case ::gig::eg2_ctrl_t::type_channelaftertouch:
247	eg2controllervalue = GetSfzEngineChannel()->ControllerTable[128];
248	break;
249	case ::gig::eg2_ctrl_t::type_velocity:
250	eg2controllervalue = MIDIKeyVelocity;
251	break;
252	case ::gig::eg2_ctrl_t::type_controlchange: // MIDI control change controller
253	eg2controllervalue = GetSfzEngineChannel()->ControllerTable[pRegion->EG2Controller.controller_number];
254	break;
255	}
256	if (pRegion->EG2ControllerInvert) eg2controllervalue = 127 - eg2controllervalue;
257
258	return eg2controllervalue;*/ // TODO: ^^^
259	return 0;
260	}
261
262	Voice::EGInfo Voice::CalculateEG2ControllerInfluence(double eg2ControllerValue) {
263	/*EGInfo eg;
264	eg.Attack = (pRegion->EG2ControllerAttackInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerAttackInfluence) * eg2ControllerValue : 1.0;
265	eg.Decay = (pRegion->EG2ControllerDecayInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerDecayInfluence) * eg2ControllerValue : 1.0;
266	eg.Release = (pRegion->EG2ControllerReleaseInfluence) ? 1 + 0.00775 * (double) (1 << pRegion->EG2ControllerReleaseInfluence) * eg2ControllerValue : 1.0;
267
268	return eg;*/ // TODO: ^^^
269	EGInfo eg;
270	eg.Attack = 1.0;
271	eg.Decay = 1.0;
272	eg.Release = 1.0;
273	return eg;
274	}
275
276	float Voice::CalculateCutoffBase(uint8_t MIDIKeyVelocity) {
277	float cutoff = *pRegion->cutoff;
278	cutoff *= RTMath::CentsToFreqRatioUnlimited(
279	MIDIKeyVelocity / 127.0f * pRegion->fil_veltrack +
280	(MIDIKey - pRegion->fil_keycenter) * pRegion->fil_keytrack);
281	return cutoff;
282	}
283
284	float Voice::CalculateFinalCutoff(float cutoffBase) {
285	float cutoff;
286	if (VCFCutoffCtrl.controller) {
287	int ccvalue = GetSfzEngineChannel()->ControllerTable[VCFCutoffCtrl.controller];
288	cutoff = CutoffBase * RTMath::CentsToFreqRatioUnlimited(
289	ccvalue / 127.0f * pRegion->cutoff_oncc[VCFCutoffCtrl.controller]);
290	} else {
291	cutoff = cutoffBase;
292	}
293	if (cutoff > 0.49 * pEngine->SampleRate) cutoff = 0.49 * pEngine->SampleRate;
294	return cutoff;
295	}
296
297	uint8_t Voice::GetVCFCutoffCtrl() {
298	// TODO: the sfz format allows several CC for the same
299	// modulation destination. The Voice interface needs to be
300	// changed to support that.
301	if (pRegion->cutoff_cc) return pRegion->cutoff_cc;
302	else if (pRegion->cutoff_chanaft) return 128;
303	return 0;
304	}
305
306	uint8_t Voice::GetVCFResonanceCtrl() {
307	/*uint8_t ctrl;
308	switch (pRegion->VCFResonanceController) {
309	case ::gig::vcf_res_ctrl_genpurpose3:
310	ctrl = 18;
311	break;
312	case ::gig::vcf_res_ctrl_genpurpose4:
313	ctrl = 19;
314	break;
315	case ::gig::vcf_res_ctrl_genpurpose5:
316	ctrl = 80;
317	break;
318	case ::gig::vcf_res_ctrl_genpurpose6:
319	ctrl = 81;
320	break;
321	case ::gig::vcf_res_ctrl_none:
322	default:
323	ctrl = 0;
324	}
325
326	return ctrl;*/ // TODO: ^^^
327	return 0;
328	}
329
330	float Voice::GetReleaseTriggerAttenuation(float noteLength) {
331	// pow(10, -rt_decay * noteLength / 20):
332	return expf(RgnInfo.ReleaseTriggerDecay * noteLength);
333	}
334
335	void Voice::ProcessGroupEvent(RTList<Event>::Iterator& itEvent) {
336	dmsg(4,("Voice %x processGroupEvents event type=%d", this, itEvent->Type));
337	if (itEvent->Type == Event::type_control_change \|\|
338	(Type & Voice::type_controller_triggered) \|\|
339	itEvent->Param.Note.Key != MIDIKey) {
340	dmsg(4,("Voice %x - kill", this));
341	if (pRegion->off_mode == ::sfz::OFF_NORMAL) {
342	// turn off the voice by entering release envelope stage
343	EnterReleaseStage();
344	} else {
345	// kill the voice fast
346	SignalRack.EnterFadeOutStage();
347	}
348	}
349	}
350
351	void Voice::SetSampleStartOffset() {
352	if (DiskVoice && RgnInfo.SampleStartOffset > pSample->MaxOffset) {
353	// The offset is applied to the RAM buffer
354	finalSynthesisParameters.dPos = 0;
355	Pos = 0;
356	} else {
357	finalSynthesisParameters.dPos = RgnInfo.SampleStartOffset; // offset where we should start playback of sample
358	Pos = RgnInfo.SampleStartOffset;
359	}
360	}
361
362	}} // namespace LinuxSampler::sfz