299 lines
12 KiB
Java
299 lines
12 KiB
Java
/*
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* Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.media.sound;
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/**
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* AHDSR control signal envelope generator.
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*
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* @author Karl Helgason
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*/
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public final class SoftEnvelopeGenerator implements SoftProcess {
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public final static int EG_OFF = 0;
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public final static int EG_DELAY = 1;
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public final static int EG_ATTACK = 2;
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public final static int EG_HOLD = 3;
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public final static int EG_DECAY = 4;
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public final static int EG_SUSTAIN = 5;
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public final static int EG_RELEASE = 6;
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public final static int EG_SHUTDOWN = 7;
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public final static int EG_END = 8;
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int max_count = 10;
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int used_count = 0;
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private final int[] stage = new int[max_count];
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private final int[] stage_ix = new int[max_count];
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private final double[] stage_v = new double[max_count];
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private final int[] stage_count = new int[max_count];
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private final double[][] on = new double[max_count][1];
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private final double[][] active = new double[max_count][1];
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private final double[][] out = new double[max_count][1];
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private final double[][] delay = new double[max_count][1];
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private final double[][] attack = new double[max_count][1];
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private final double[][] hold = new double[max_count][1];
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private final double[][] decay = new double[max_count][1];
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private final double[][] sustain = new double[max_count][1];
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private final double[][] release = new double[max_count][1];
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private final double[][] shutdown = new double[max_count][1];
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private final double[][] release2 = new double[max_count][1];
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private final double[][] attack2 = new double[max_count][1];
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private final double[][] decay2 = new double[max_count][1];
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private double control_time = 0;
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public void reset() {
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for (int i = 0; i < used_count; i++) {
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stage[i] = 0;
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on[i][0] = 0;
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out[i][0] = 0;
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delay[i][0] = 0;
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attack[i][0] = 0;
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hold[i][0] = 0;
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decay[i][0] = 0;
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sustain[i][0] = 0;
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release[i][0] = 0;
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shutdown[i][0] = 0;
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attack2[i][0] = 0;
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decay2[i][0] = 0;
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release2[i][0] = 0;
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}
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used_count = 0;
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}
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public void init(SoftSynthesizer synth) {
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control_time = 1.0 / synth.getControlRate();
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processControlLogic();
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}
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public double[] get(int instance, String name) {
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if (instance >= used_count)
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used_count = instance + 1;
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if (name == null)
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return out[instance];
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if (name.equals("on"))
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return on[instance];
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if (name.equals("active"))
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return active[instance];
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if (name.equals("delay"))
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return delay[instance];
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if (name.equals("attack"))
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return attack[instance];
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if (name.equals("hold"))
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return hold[instance];
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if (name.equals("decay"))
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return decay[instance];
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if (name.equals("sustain"))
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return sustain[instance];
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if (name.equals("release"))
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return release[instance];
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if (name.equals("shutdown"))
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return shutdown[instance];
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if (name.equals("attack2"))
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return attack2[instance];
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if (name.equals("decay2"))
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return decay2[instance];
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if (name.equals("release2"))
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return release2[instance];
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return null;
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}
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public void processControlLogic() {
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for (int i = 0; i < used_count; i++) {
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if (stage[i] == EG_END)
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continue;
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if ((stage[i] > EG_OFF) && (stage[i] < EG_RELEASE)) {
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if (on[i][0] < 0.5) {
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if (on[i][0] < -0.5) {
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stage_count[i] = (int)(Math.pow(2,
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this.shutdown[i][0] / 1200.0) / control_time);
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if (stage_count[i] < 0)
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stage_count[i] = 0;
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stage_v[i] = out[i][0];
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stage_ix[i] = 0;
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stage[i] = EG_SHUTDOWN;
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} else {
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if ((release2[i][0] < 0.000001) && release[i][0] < 0
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&& Double.isInfinite(release[i][0])) {
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out[i][0] = 0;
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active[i][0] = 0;
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stage[i] = EG_END;
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continue;
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}
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stage_count[i] = (int)(Math.pow(2,
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this.release[i][0] / 1200.0) / control_time);
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stage_count[i]
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+= (int)(this.release2[i][0]/(control_time * 1000));
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if (stage_count[i] < 0)
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stage_count[i] = 0;
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// stage_v[i] = out[i][0];
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stage_ix[i] = 0;
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double m = 1 - out[i][0];
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stage_ix[i] = (int)(stage_count[i] * m);
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stage[i] = EG_RELEASE;
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}
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}
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}
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switch (stage[i]) {
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case EG_OFF:
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active[i][0] = 1;
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if (on[i][0] < 0.5)
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break;
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stage[i] = EG_DELAY;
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stage_ix[i] = (int)(Math.pow(2,
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this.delay[i][0] / 1200.0) / control_time);
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if (stage_ix[i] < 0)
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stage_ix[i] = 0;
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case EG_DELAY:
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if (stage_ix[i] == 0) {
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double attack = this.attack[i][0];
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double attack2 = this.attack2[i][0];
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if (attack2 < 0.000001
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&& (attack < 0 && Double.isInfinite(attack))) {
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out[i][0] = 1;
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stage[i] = EG_HOLD;
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stage_count[i] = (int)(Math.pow(2,
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this.hold[i][0] / 1200.0) / control_time);
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stage_ix[i] = 0;
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} else {
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stage[i] = EG_ATTACK;
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stage_count[i] = (int)(Math.pow(2,
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attack / 1200.0) / control_time);
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stage_count[i] += (int)(attack2 / (control_time * 1000));
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if (stage_count[i] < 0)
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stage_count[i] = 0;
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stage_ix[i] = 0;
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}
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} else
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stage_ix[i]--;
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break;
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case EG_ATTACK:
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stage_ix[i]++;
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if (stage_ix[i] >= stage_count[i]) {
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out[i][0] = 1;
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stage[i] = EG_HOLD;
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} else {
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// CONVEX attack
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double a = ((double)stage_ix[i]) / ((double)stage_count[i]);
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a = 1 + ((40.0 / 96.0) / Math.log(10)) * Math.log(a);
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if (a < 0)
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a = 0;
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else if (a > 1)
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a = 1;
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out[i][0] = a;
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}
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break;
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case EG_HOLD:
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stage_ix[i]++;
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if (stage_ix[i] >= stage_count[i]) {
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stage[i] = EG_DECAY;
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stage_count[i] = (int)(Math.pow(2,
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this.decay[i][0] / 1200.0) / control_time);
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stage_count[i] += (int)(this.decay2[i][0]/(control_time*1000));
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if (stage_count[i] < 0)
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stage_count[i] = 0;
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stage_ix[i] = 0;
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}
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break;
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case EG_DECAY:
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stage_ix[i]++;
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double sustain = this.sustain[i][0] * (1.0 / 1000.0);
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if (stage_ix[i] >= stage_count[i]) {
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out[i][0] = sustain;
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stage[i] = EG_SUSTAIN;
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if (sustain < 0.001) {
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out[i][0] = 0;
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active[i][0] = 0;
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stage[i] = EG_END;
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}
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} else {
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double m = ((double)stage_ix[i]) / ((double)stage_count[i]);
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out[i][0] = (1 - m) + sustain * m;
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}
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break;
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case EG_SUSTAIN:
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break;
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case EG_RELEASE:
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stage_ix[i]++;
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if (stage_ix[i] >= stage_count[i]) {
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out[i][0] = 0;
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active[i][0] = 0;
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stage[i] = EG_END;
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} else {
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double m = ((double)stage_ix[i]) / ((double)stage_count[i]);
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out[i][0] = (1 - m); // *stage_v[i];
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if (on[i][0] < -0.5) {
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stage_count[i] = (int)(Math.pow(2,
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this.shutdown[i][0] / 1200.0) / control_time);
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if (stage_count[i] < 0)
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stage_count[i] = 0;
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stage_v[i] = out[i][0];
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stage_ix[i] = 0;
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stage[i] = EG_SHUTDOWN;
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}
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// re-damping
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if (on[i][0] > 0.5) {
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sustain = this.sustain[i][0] * (1.0 / 1000.0);
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if (out[i][0] > sustain) {
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stage[i] = EG_DECAY;
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stage_count[i] = (int)(Math.pow(2,
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this.decay[i][0] / 1200.0) / control_time);
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stage_count[i] +=
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(int)(this.decay2[i][0]/(control_time*1000));
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if (stage_count[i] < 0)
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stage_count[i] = 0;
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m = (out[i][0] - 1) / (sustain - 1);
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stage_ix[i] = (int) (stage_count[i] * m);
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}
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}
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}
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break;
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case EG_SHUTDOWN:
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stage_ix[i]++;
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if (stage_ix[i] >= stage_count[i]) {
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out[i][0] = 0;
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active[i][0] = 0;
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stage[i] = EG_END;
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} else {
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double m = ((double)stage_ix[i]) / ((double)stage_count[i]);
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out[i][0] = (1 - m) * stage_v[i];
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}
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break;
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default:
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break;
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}
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}
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}
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}
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