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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 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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float EGADSR::CalculateFadeOutCoeff() { |
float EGADSR::CalculateFadeOutCoeff() { |
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const float sampleRate = 44100.0; // even if the sample rate will be 192kHz it won't hurt at all |
const float sampleRate = 44100.0; // even if the sample rate will be 192kHz it won't hurt at all |
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const float killSteps = EG_MIN_RELEASE_TIME * sampleRate; |
const float killSteps = CONFIG_EG_MIN_RELEASE_TIME * sampleRate; |
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return -1.0f / killSteps; |
return -1.0f / killSteps; |
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} |
} |
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int iSample = TriggerDelay; |
int iSample = TriggerDelay; |
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#if DEVMODE |
#if CONFIG_DEVMODE |
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if (TriggerDelay > TotalSamples) { // FIXME: should be removed before the final release (purpose: just a sanity check for debugging) |
if (TriggerDelay > TotalSamples) { // FIXME: should be removed before the final release (purpose: just a sanity check for debugging) |
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dmsg(1,("EGADSR: ERROR, TriggerDelay > Totalsamples\n")); |
dmsg(1,("EGADSR: ERROR, TriggerDelay > Totalsamples\n")); |
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int* i = NULL; |
int* i = NULL; |
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(*i)++; // force a segfault |
(*i)++; // force a segfault |
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} |
} |
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#endif // DEVMODE |
#endif // CONFIG_DEVMODE |
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while (iSample < TotalSamples) { |
while (iSample < TotalSamples) { |
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Level += Level * Decay2Coeff; |
Level += Level * Decay2Coeff; |
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pEngine->pSynthesisParameters[ModulationDestination][iSample++] *= Level; |
pEngine->pSynthesisParameters[ModulationDestination][iSample++] *= Level; |
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} |
} |
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if (Level <= EG_ENVELOPE_LIMIT) Stage = stage_fadeout; |
if (Level <= CONFIG_EG_BOTTOM) Stage = stage_fadeout; |
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break; |
break; |
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} |
} |
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case stage_sustain: { |
case stage_sustain: { |
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Level += Level * ReleaseCoeff; |
Level += Level * ReleaseCoeff; |
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pEngine->pSynthesisParameters[ModulationDestination][iSample++] *= Level; |
pEngine->pSynthesisParameters[ModulationDestination][iSample++] *= Level; |
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} |
} |
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if (Level <= EG_ENVELOPE_LIMIT) Stage = stage_fadeout; |
if (Level <= CONFIG_EG_BOTTOM) Stage = stage_fadeout; |
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break; |
break; |
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} |
} |
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case stage_fadeout: { |
case stage_fadeout: { |
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} |
} |
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} |
} |
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#if DEVMODE |
#if CONFIG_DEVMODE |
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if (itKillEvent && Stage != stage_end) { // FIXME: should be removed before the final release (purpose: just a sanity check for debugging) |
if (itKillEvent && Stage != stage_end) { // FIXME: should be removed before the final release (purpose: just a sanity check for debugging) |
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dmsg(1,("EGADSR: ERROR, voice killing not completed !!!\n")); |
dmsg(1,("EGADSR: ERROR, voice killing not completed !!!\n")); |
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dmsg(1,("EGADSR: Stage=%d,iSample=%d,Samples=%d, TotalSamples=%d, MaxFadoutPos=%d\n",Stage,iSample,Samples,TotalSamples,pEngine->MaxFadeOutPos)); |
dmsg(1,("EGADSR: Stage=%d,iSample=%d,Samples=%d, TotalSamples=%d, MaxFadoutPos=%d\n",Stage,iSample,Samples,TotalSamples,pEngine->MaxFadeOutPos)); |
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} |
} |
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#endif // DEVMODE |
#endif // CONFIG_DEVMODE |
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} |
} |
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/** |
/** |
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void EGADSR::Trigger(uint PreAttack, double AttackTime, bool HoldAttack, long LoopStart, double Decay1Time, double Decay2Time, bool InfiniteSustain, uint SustainLevel, double ReleaseTime, uint Delay) { |
void EGADSR::Trigger(uint PreAttack, double AttackTime, bool HoldAttack, long LoopStart, double Decay1Time, double Decay2Time, bool InfiniteSustain, uint SustainLevel, double ReleaseTime, uint Delay) { |
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this->TriggerDelay = Delay; |
this->TriggerDelay = Delay; |
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this->Stage = stage_attack; |
this->Stage = stage_attack; |
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this->SustainLevel = (SustainLevel) ? (SustainLevel > EG_ENVELOPE_LIMIT) ? (float) SustainLevel / 1000.0 : EG_ENVELOPE_LIMIT : 1.0; |
this->SustainLevel = (SustainLevel) ? (SustainLevel > CONFIG_EG_BOTTOM) ? (float) SustainLevel / 1000.0 : CONFIG_EG_BOTTOM : 1.0; |
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this->InfiniteSustain = InfiniteSustain; |
this->InfiniteSustain = InfiniteSustain; |
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this->HoldAttack = HoldAttack; |
this->HoldAttack = HoldAttack; |
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this->LoopStart = LoopStart; |
this->LoopStart = LoopStart; |
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// calculate decay2 stage parameters (exp. curve) |
// calculate decay2 stage parameters (exp. curve) |
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if (!InfiniteSustain) { |
if (!InfiniteSustain) { |
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if (Decay2Time < EG_MIN_RELEASE_TIME) Decay2Time = EG_MIN_RELEASE_TIME; |
if (Decay2Time < CONFIG_EG_MIN_RELEASE_TIME) Decay2Time = CONFIG_EG_MIN_RELEASE_TIME; |
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long Decay2Steps = (long) (Decay2Time * pEngine->pAudioOutputDevice->SampleRate()); |
long Decay2Steps = (long) (Decay2Time * pEngine->pAudioOutputDevice->SampleRate()); |
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Decay2Coeff = (Decay2Steps) ? exp((log(EG_ENVELOPE_LIMIT) - log(this->SustainLevel)) / Decay2Steps + log(this->SustainLevel)) - this->SustainLevel |
Decay2Coeff = (Decay2Steps) ? exp((log(CONFIG_EG_BOTTOM) - log(this->SustainLevel)) / Decay2Steps + log(this->SustainLevel)) - this->SustainLevel |
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: 0.0; |
: 0.0; |
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} |
} |
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// calculate release stage parameters (exp. curve) |
// calculate release stage parameters (exp. curve) |
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if (ReleaseTime < EG_MIN_RELEASE_TIME) ReleaseTime = EG_MIN_RELEASE_TIME; // to avoid click sounds at the end of the sample playback |
if (ReleaseTime < CONFIG_EG_MIN_RELEASE_TIME) ReleaseTime = CONFIG_EG_MIN_RELEASE_TIME; // to avoid click sounds at the end of the sample playback |
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ReleaseStepsLeft = (long) (ReleaseTime * pEngine->pAudioOutputDevice->SampleRate()); |
ReleaseStepsLeft = (long) (ReleaseTime * pEngine->pAudioOutputDevice->SampleRate()); |
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ReleaseCoeff = exp((log(EG_ENVELOPE_LIMIT) - log(this->SustainLevel)) / ReleaseStepsLeft + log(this->SustainLevel)) - this->SustainLevel; |
ReleaseCoeff = exp((log(CONFIG_EG_BOTTOM) - log(this->SustainLevel)) / ReleaseStepsLeft + log(this->SustainLevel)) - this->SustainLevel; |
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dmsg(4,("PreAttack=%d, AttackLength=%d, AttackCoeff=%f, Decay1Coeff=%f, Decay2Coeff=%f, ReleaseLength=%d, ReleaseCoeff=%f\n", |
dmsg(4,("PreAttack=%d, AttackLength=%d, AttackCoeff=%f, Decay1Coeff=%f, Decay2Coeff=%f, ReleaseLength=%d, ReleaseCoeff=%f\n", |
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PreAttack, AttackStepsLeft, AttackCoeff, Decay1Coeff, Decay2Coeff, ReleaseStepsLeft, ReleaseCoeff)); |
PreAttack, AttackStepsLeft, AttackCoeff, Decay1Coeff, Decay2Coeff, ReleaseStepsLeft, ReleaseCoeff)); |