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* LinuxSampler - modular, streaming capable sampler * |
* LinuxSampler - modular, streaming capable sampler * |
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* * |
* * |
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* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
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* Copyright (C) 2005 - 2016 Christian Schoenebeck * |
* Copyright (C) 2005 - 2017 Christian Schoenebeck * |
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* * |
* * |
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* This program is free software; you can redistribute it and/or modify * |
* This program is free software; you can redistribute it and/or modify * |
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* 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 * |
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namespace LinuxSampler { namespace gig { |
namespace LinuxSampler { namespace gig { |
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EGADSR::EGADSR() : EG() { |
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AttackCancel = true; |
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AttackHoldCancel = true; |
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Decay1Cancel = true; |
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Decay2Cancel = true; |
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ReleaseCancel = true; |
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} |
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#define isTransitionEvent(type) \ |
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( type == event_release || type == event_cancel_release ) |
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void EGADSR::update(event_t Event, uint SampleRate) { |
void EGADSR::update(event_t Event, uint SampleRate) { |
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if (atEnd(Event)) return; |
if (atEnd(Event)) return; |
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case stage_attack: |
case stage_attack: |
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switch (Event) { |
switch (Event) { |
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case event_release: |
case event_release: |
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enterReleasePart1Stage(); |
if (AttackCancel) |
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enterNextStageForReleaseEvent(SampleRate); |
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else |
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PostponedEvent = Event; |
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break; |
break; |
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case event_stage_end: |
case event_stage_end: |
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if (HoldAttack) |
if (PostponedEvent == event_release) |
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enterNextStageForReleaseEvent(SampleRate); |
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else if (HoldAttack) |
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enterAttackHoldStage(); |
enterAttackHoldStage(); |
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else |
else |
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enterDecay1Part1Stage(SampleRate); |
enterDecay1Part1Stage(SampleRate); |
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break; |
break; |
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} |
} |
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case event_hold_end: |
case event_hold_end: |
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enterDecay1Part1Stage(SampleRate); |
if (PostponedEvent == event_release) |
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enterNextStageForReleaseEvent(SampleRate); |
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else |
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enterDecay1Part1Stage(SampleRate); |
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break; |
break; |
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case event_release: |
case event_release: |
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enterReleasePart1Stage(); |
if (AttackHoldCancel) |
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enterNextStageForReleaseEvent(SampleRate); |
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else |
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PostponedEvent = Event; |
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break; |
break; |
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default: ; // noop |
default: ; // noop |
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} |
} |
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enterDecay1Part2Stage(SampleRate); |
enterDecay1Part2Stage(SampleRate); |
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break; |
break; |
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case event_release: |
case event_release: |
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enterReleasePart1Stage(); |
if (Decay1Cancel) |
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enterNextStageForReleaseEvent(SampleRate); |
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else |
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PostponedEvent = Event; |
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break; |
break; |
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default: ; // noop |
default: ; // noop |
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} |
} |
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case stage_decay1_part2: |
case stage_decay1_part2: |
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switch (Event) { |
switch (Event) { |
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case event_release: |
case event_release: |
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enterReleasePart1Stage(); |
if (Decay1Cancel) |
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enterNextStageForReleaseEvent(SampleRate); |
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else |
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PostponedEvent = Event; |
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break; |
break; |
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case event_stage_end: |
case event_stage_end: |
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if (Level < CONFIG_EG_BOTTOM) |
if (Level < CONFIG_EG_BOTTOM) |
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enterEndStage(); |
enterEndStage(); |
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else if (PostponedEvent == event_release) |
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enterNextStageForReleaseEvent(SampleRate); |
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else if (InfiniteSustain) |
else if (InfiniteSustain) |
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enterSustainStage(); |
enterSustainStage(); |
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else |
else |
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enterFadeOutStage(); |
enterFadeOutStage(); |
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break; |
break; |
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case event_release: |
case event_release: |
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enterReleasePart1Stage(); |
if (Decay2Cancel) |
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enterReleasePart1Stage(); |
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else |
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PostponedEvent = Event; |
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break; |
break; |
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case event_hold_end: |
case event_hold_end: |
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enterDecay1Part1Stage(SampleRate); |
if (PostponedEvent == event_release && Decay1Cancel) |
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enterReleasePart1Stage(); |
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else |
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enterDecay1Part1Stage(SampleRate); |
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break; |
break; |
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default: ; // noop |
default: ; // noop |
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} |
} |
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enterReleasePart2Stage(); |
enterReleasePart2Stage(); |
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break; |
break; |
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case event_cancel_release: |
case event_cancel_release: |
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if (!ReleaseCancel) |
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break; |
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if (InfiniteSustain) |
if (InfiniteSustain) |
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enterSustainStage(); |
enterSustainStage(); |
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else |
else |
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enterFadeOutStage(); |
enterFadeOutStage(); |
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break; |
break; |
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case event_cancel_release: |
case event_cancel_release: |
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if (!ReleaseCancel) |
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break; |
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if (InfiniteSustain) |
if (InfiniteSustain) |
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enterSustainStage(); |
enterSustainStage(); |
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else |
else |
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ReleaseCoeff3 = ExpOffset * (1 - ReleaseCoeff2); |
ReleaseCoeff3 = ExpOffset * (1 - ReleaseCoeff2); |
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ReleaseLevel2 = 0.25 * invVolume; |
ReleaseLevel2 = 0.25 * invVolume; |
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PostponedEvent = (event_t) -1; // init with anything except release or cancel_release |
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enterFirstStage(); |
enterFirstStage(); |
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enterAttackStage(PreAttack, AttackTime, SampleRate); |
enterAttackStage(PreAttack, AttackTime, SampleRate); |
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} |
} |
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void EGADSR::setStateOptions(bool AttackCancel, bool AttackHoldCancel, bool Decay1Cancel, bool Decay2Cancel, bool ReleaseCancel) { |
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this->AttackCancel = AttackCancel; |
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this->AttackHoldCancel = AttackHoldCancel; |
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this->Decay1Cancel = Decay1Cancel; |
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this->Decay2Cancel = Decay2Cancel; |
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this->ReleaseCancel = ReleaseCancel; |
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} |
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void EGADSR::enterNextStageForReleaseEvent(uint SampleRate) { |
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switch (Stage) { |
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case stage_attack: |
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if (HoldAttack && !AttackHoldCancel) { |
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enterAttackHoldStage(); |
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return; |
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} |
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case stage_attack_hold: |
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if (!Decay1Cancel) { |
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enterDecay1Part1Stage(SampleRate); |
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return; |
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} |
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case stage_decay1_part1: |
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case stage_decay1_part2: |
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if (InfiniteSustain) { |
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enterReleasePart1Stage(); |
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return; |
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} else if (!Decay2Cancel) { |
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enterDecay2Stage(SampleRate); |
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return; |
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} |
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default: |
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enterReleasePart1Stage(); |
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} |
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} |
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void EGADSR::enterAttackStage(const uint PreAttack, const float AttackTime, const uint SampleRate) { |
void EGADSR::enterAttackStage(const uint PreAttack, const float AttackTime, const uint SampleRate) { |
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Stage = stage_attack; |
Stage = stage_attack; |
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Segment = segment_lin; |
Segment = segment_lin; |
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StepsLeft = int((RTMath::Max(Decay1Level2, SustainLevel) - Level) / Coeff); |
StepsLeft = int((RTMath::Max(Decay1Level2, SustainLevel) - Level) / Coeff); |
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if (StepsLeft <= 0) enterDecay1Part2Stage(SampleRate); |
if (StepsLeft <= 0) enterDecay1Part2Stage(SampleRate); |
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} else { |
} else { |
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if (InfiniteSustain) enterSustainStage(); |
if (PostponedEvent == event_release) { |
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else enterDecay2Stage(SampleRate); |
Stage = stage_decay1_part2; // pretend decay 1 part 2 was completed |
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enterNextStageForReleaseEvent(SampleRate); |
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} else if (InfiniteSustain) { |
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enterSustainStage(); |
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} else { |
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enterDecay2Stage(SampleRate); |
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} |
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} |
} |
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} |
} |
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StepsLeft = int(log((SustainLevel - ExpOffset) / (Level - ExpOffset)) / Decay1Slope); |
StepsLeft = int(log((SustainLevel - ExpOffset) / (Level - ExpOffset)) / Decay1Slope); |
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if (StepsLeft > 0) return; |
if (StepsLeft > 0) return; |
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} |
} |
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if (InfiniteSustain) enterSustainStage(); |
if (PostponedEvent == event_release) { |
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else enterDecay2Stage(SampleRate); |
Stage = stage_decay1_part2; |
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enterNextStageForReleaseEvent(SampleRate); |
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} else if (InfiniteSustain) { |
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enterSustainStage(); |
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} else { |
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enterDecay2Stage(SampleRate); |
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} |
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} |
} |
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void EGADSR::enterDecay2Stage(const uint SampleRate) { |
void EGADSR::enterDecay2Stage(const uint SampleRate) { |
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Coeff = 0.0f; // don't change the envelope level in this stage |
Coeff = 0.0f; // don't change the envelope level in this stage |
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const int intMax = (unsigned int) -1 >> 1; |
const int intMax = (unsigned int) -1 >> 1; |
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StepsLeft = intMax; // we use the highest value possible (we refresh StepsLeft in update() in case) |
StepsLeft = intMax; // we use the highest value possible (we refresh StepsLeft in update() in case) |
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PostponedEvent = (event_t) -1; // reset with anything except release or cancel_release |
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} |
} |
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void EGADSR::enterReleasePart1Stage() { |
void EGADSR::enterReleasePart1Stage() { |
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Segment = segment_lin; |
Segment = segment_lin; |
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StepsLeft = int((ReleaseLevel2 - Level) / ReleaseCoeff); |
StepsLeft = int((ReleaseLevel2 - Level) / ReleaseCoeff); |
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Coeff = ReleaseCoeff; |
Coeff = ReleaseCoeff; |
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PostponedEvent = (event_t) -1; // reset with anything except release or cancel_release |
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if (StepsLeft <= 0) enterReleasePart2Stage(); |
if (StepsLeft <= 0) enterReleasePart2Stage(); |
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} |
} |
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