| /* |
| * Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| package com.sun.media.sound; |
| |
| /** |
| * AHDSR control signal envelope generator. |
| * |
| * @author Karl Helgason |
| */ |
| public final class SoftEnvelopeGenerator implements SoftProcess { |
| |
| public final static int EG_OFF = 0; |
| public final static int EG_DELAY = 1; |
| public final static int EG_ATTACK = 2; |
| public final static int EG_HOLD = 3; |
| public final static int EG_DECAY = 4; |
| public final static int EG_SUSTAIN = 5; |
| public final static int EG_RELEASE = 6; |
| public final static int EG_SHUTDOWN = 7; |
| public final static int EG_END = 8; |
| int max_count = 10; |
| int used_count = 0; |
| private final int[] stage = new int[max_count]; |
| private final int[] stage_ix = new int[max_count]; |
| private final double[] stage_v = new double[max_count]; |
| private final int[] stage_count = new int[max_count]; |
| private final double[][] on = new double[max_count][1]; |
| private final double[][] active = new double[max_count][1]; |
| private final double[][] out = new double[max_count][1]; |
| private final double[][] delay = new double[max_count][1]; |
| private final double[][] attack = new double[max_count][1]; |
| private final double[][] hold = new double[max_count][1]; |
| private final double[][] decay = new double[max_count][1]; |
| private final double[][] sustain = new double[max_count][1]; |
| private final double[][] release = new double[max_count][1]; |
| private final double[][] shutdown = new double[max_count][1]; |
| private final double[][] release2 = new double[max_count][1]; |
| private final double[][] attack2 = new double[max_count][1]; |
| private final double[][] decay2 = new double[max_count][1]; |
| private double control_time = 0; |
| |
| public void reset() { |
| for (int i = 0; i < used_count; i++) { |
| stage[i] = 0; |
| on[i][0] = 0; |
| out[i][0] = 0; |
| delay[i][0] = 0; |
| attack[i][0] = 0; |
| hold[i][0] = 0; |
| decay[i][0] = 0; |
| sustain[i][0] = 0; |
| release[i][0] = 0; |
| shutdown[i][0] = 0; |
| attack2[i][0] = 0; |
| decay2[i][0] = 0; |
| release2[i][0] = 0; |
| } |
| used_count = 0; |
| } |
| |
| public void init(SoftSynthesizer synth) { |
| control_time = 1.0 / synth.getControlRate(); |
| processControlLogic(); |
| } |
| |
| public double[] get(int instance, String name) { |
| if (instance >= used_count) |
| used_count = instance + 1; |
| if (name == null) |
| return out[instance]; |
| if (name.equals("on")) |
| return on[instance]; |
| if (name.equals("active")) |
| return active[instance]; |
| if (name.equals("delay")) |
| return delay[instance]; |
| if (name.equals("attack")) |
| return attack[instance]; |
| if (name.equals("hold")) |
| return hold[instance]; |
| if (name.equals("decay")) |
| return decay[instance]; |
| if (name.equals("sustain")) |
| return sustain[instance]; |
| if (name.equals("release")) |
| return release[instance]; |
| if (name.equals("shutdown")) |
| return shutdown[instance]; |
| if (name.equals("attack2")) |
| return attack2[instance]; |
| if (name.equals("decay2")) |
| return decay2[instance]; |
| if (name.equals("release2")) |
| return release2[instance]; |
| |
| return null; |
| } |
| |
| public void processControlLogic() { |
| for (int i = 0; i < used_count; i++) { |
| |
| if (stage[i] == EG_END) |
| continue; |
| |
| if ((stage[i] > EG_OFF) && (stage[i] < EG_RELEASE)) { |
| if (on[i][0] < 0.5) { |
| if (on[i][0] < -0.5) { |
| stage_count[i] = (int)(Math.pow(2, |
| this.shutdown[i][0] / 1200.0) / control_time); |
| if (stage_count[i] < 0) |
| stage_count[i] = 0; |
| stage_v[i] = out[i][0]; |
| stage_ix[i] = 0; |
| stage[i] = EG_SHUTDOWN; |
| } else { |
| if ((release2[i][0] < 0.000001) && release[i][0] < 0 |
| && Double.isInfinite(release[i][0])) { |
| out[i][0] = 0; |
| active[i][0] = 0; |
| stage[i] = EG_END; |
| continue; |
| } |
| |
| stage_count[i] = (int)(Math.pow(2, |
| this.release[i][0] / 1200.0) / control_time); |
| stage_count[i] |
| += (int)(this.release2[i][0]/(control_time * 1000)); |
| if (stage_count[i] < 0) |
| stage_count[i] = 0; |
| // stage_v[i] = out[i][0]; |
| stage_ix[i] = 0; |
| |
| double m = 1 - out[i][0]; |
| stage_ix[i] = (int)(stage_count[i] * m); |
| |
| stage[i] = EG_RELEASE; |
| } |
| } |
| } |
| |
| switch (stage[i]) { |
| case EG_OFF: |
| active[i][0] = 1; |
| if (on[i][0] < 0.5) |
| break; |
| stage[i] = EG_DELAY; |
| stage_ix[i] = (int)(Math.pow(2, |
| this.delay[i][0] / 1200.0) / control_time); |
| if (stage_ix[i] < 0) |
| stage_ix[i] = 0; |
| case EG_DELAY: |
| if (stage_ix[i] == 0) { |
| double attack = this.attack[i][0]; |
| double attack2 = this.attack2[i][0]; |
| |
| if (attack2 < 0.000001 |
| && (attack < 0 && Double.isInfinite(attack))) { |
| out[i][0] = 1; |
| stage[i] = EG_HOLD; |
| stage_count[i] = (int)(Math.pow(2, |
| this.hold[i][0] / 1200.0) / control_time); |
| stage_ix[i] = 0; |
| } else { |
| stage[i] = EG_ATTACK; |
| stage_count[i] = (int)(Math.pow(2, |
| attack / 1200.0) / control_time); |
| stage_count[i] += (int)(attack2 / (control_time * 1000)); |
| if (stage_count[i] < 0) |
| stage_count[i] = 0; |
| stage_ix[i] = 0; |
| } |
| } else |
| stage_ix[i]--; |
| break; |
| case EG_ATTACK: |
| stage_ix[i]++; |
| if (stage_ix[i] >= stage_count[i]) { |
| out[i][0] = 1; |
| stage[i] = EG_HOLD; |
| } else { |
| // CONVEX attack |
| double a = ((double)stage_ix[i]) / ((double)stage_count[i]); |
| a = 1 + ((40.0 / 96.0) / Math.log(10)) * Math.log(a); |
| if (a < 0) |
| a = 0; |
| else if (a > 1) |
| a = 1; |
| out[i][0] = a; |
| } |
| break; |
| case EG_HOLD: |
| stage_ix[i]++; |
| if (stage_ix[i] >= stage_count[i]) { |
| stage[i] = EG_DECAY; |
| stage_count[i] = (int)(Math.pow(2, |
| this.decay[i][0] / 1200.0) / control_time); |
| stage_count[i] += (int)(this.decay2[i][0]/(control_time*1000)); |
| if (stage_count[i] < 0) |
| stage_count[i] = 0; |
| stage_ix[i] = 0; |
| } |
| break; |
| case EG_DECAY: |
| stage_ix[i]++; |
| double sustain = this.sustain[i][0] * (1.0 / 1000.0); |
| if (stage_ix[i] >= stage_count[i]) { |
| out[i][0] = sustain; |
| stage[i] = EG_SUSTAIN; |
| if (sustain < 0.001) { |
| out[i][0] = 0; |
| active[i][0] = 0; |
| stage[i] = EG_END; |
| } |
| } else { |
| double m = ((double)stage_ix[i]) / ((double)stage_count[i]); |
| out[i][0] = (1 - m) + sustain * m; |
| } |
| break; |
| case EG_SUSTAIN: |
| break; |
| case EG_RELEASE: |
| stage_ix[i]++; |
| if (stage_ix[i] >= stage_count[i]) { |
| out[i][0] = 0; |
| active[i][0] = 0; |
| stage[i] = EG_END; |
| } else { |
| double m = ((double)stage_ix[i]) / ((double)stage_count[i]); |
| out[i][0] = (1 - m); // *stage_v[i]; |
| |
| if (on[i][0] < -0.5) { |
| stage_count[i] = (int)(Math.pow(2, |
| this.shutdown[i][0] / 1200.0) / control_time); |
| if (stage_count[i] < 0) |
| stage_count[i] = 0; |
| stage_v[i] = out[i][0]; |
| stage_ix[i] = 0; |
| stage[i] = EG_SHUTDOWN; |
| } |
| |
| // re-damping |
| if (on[i][0] > 0.5) { |
| sustain = this.sustain[i][0] * (1.0 / 1000.0); |
| if (out[i][0] > sustain) { |
| stage[i] = EG_DECAY; |
| stage_count[i] = (int)(Math.pow(2, |
| this.decay[i][0] / 1200.0) / control_time); |
| stage_count[i] += |
| (int)(this.decay2[i][0]/(control_time*1000)); |
| if (stage_count[i] < 0) |
| stage_count[i] = 0; |
| m = (out[i][0] - 1) / (sustain - 1); |
| stage_ix[i] = (int) (stage_count[i] * m); |
| } |
| } |
| |
| } |
| break; |
| case EG_SHUTDOWN: |
| stage_ix[i]++; |
| if (stage_ix[i] >= stage_count[i]) { |
| out[i][0] = 0; |
| active[i][0] = 0; |
| stage[i] = EG_END; |
| } else { |
| double m = ((double)stage_ix[i]) / ((double)stage_count[i]); |
| out[i][0] = (1 - m) * stage_v[i]; |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| } |
| } |
