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/*************************************************************************** |
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* * |
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* LinuxSampler - modular, streaming capable sampler * |
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* * |
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* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
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* Copyright (C) 2005 - 2010 Christian Schoenebeck * |
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* * |
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* 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 * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the Free Software * |
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, * |
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* MA 02110-1301 USA * |
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***************************************************************************/ |
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|
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#include "EG.h" |
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|
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namespace LinuxSampler { |
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|
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EG::EG() { |
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enterEndStage(); |
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Level = 0.0; |
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CalculateFadeOutCoeff(CONFIG_EG_MIN_RELEASE_TIME, 44100.0); // even if the sample rate will be 192kHz it won't hurt at all |
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} |
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|
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void EG::CalculateFadeOutCoeff(float FadeOutTime, float SampleRate) { |
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const float killSteps = FadeOutTime * SampleRate / CONFIG_DEFAULT_SUBFRAGMENT_SIZE; |
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FadeOutCoeff = -1.0f / killSteps; |
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} |
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|
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void EG::enterFadeOutStage() { |
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Stage = stage_fadeout; |
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Segment = segment_lin; |
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StepsLeft = int(Level / (-FadeOutCoeff)); |
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Coeff = FadeOutCoeff; |
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if (StepsLeft <= 0) enterEndStage(); |
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} |
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|
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void EG::enterFadeOutStage(int maxFadeOutSteps) { |
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Stage = stage_fadeout; |
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Segment = segment_lin; |
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StepsLeft = int(Level / (-FadeOutCoeff)); |
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if (StepsLeft > maxFadeOutSteps) { |
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StepsLeft = maxFadeOutSteps; |
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Coeff = -Level / maxFadeOutSteps; |
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} else { |
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Coeff = FadeOutCoeff; |
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} |
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if (StepsLeft <= 0) enterEndStage(); |
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} |
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|
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bool EG::atEnd(event_t Event) { |
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if (Stage == stage_end) return true; |
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if (Stage == stage_fadeout) { |
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if (Event == event_stage_end) enterEndStage(); |
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return true; |
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} |
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return false; |
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} |
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|
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void EG::enterEndStage() { |
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Stage = stage_end; |
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Segment = segment_end; |
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Level = 0; |
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} |
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} |