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Diffstat (limited to 'src/com/jsyn/unitgen/GrainFarm.java')
| -rw-r--r-- | src/com/jsyn/unitgen/GrainFarm.java | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/src/com/jsyn/unitgen/GrainFarm.java b/src/com/jsyn/unitgen/GrainFarm.java deleted file mode 100644 index 78179bc..0000000 --- a/src/com/jsyn/unitgen/GrainFarm.java +++ /dev/null @@ -1,178 +0,0 @@ -/* - * Copyright 2011 Phil Burk, Mobileer Inc - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -package com.jsyn.unitgen; - -import com.jsyn.ports.UnitInputPort; -import com.jsyn.ports.UnitOutputPort; -import com.jsyn.util.PseudoRandom; - -/** - * A unit generator that generates a cloud of sound using multiple Grains. Special thanks to my - * friend Ross Bencina for his excellent article on Granular Synthesis. Several of his ideas are - * reflected in this architecture. "Implementing Real-Time Granular Synthesis" by Ross Bencina, - * Audio Anecdotes III, 2001. - * - * <pre><code> - synth.add( sampleGrainFarm = new GrainFarm() ); - grainFarm.allocate( NUM_GRAINS ); -</code></pre> - * - * @author Phil Burk (C) 2011 Mobileer Inc - * @see Grain - * @see GrainSourceSine - * @see RaisedCosineEnvelope - */ -public class GrainFarm extends UnitGenerator implements UnitSource { - /** A scaler for playback rate. Nominally 1.0. */ - public UnitInputPort rate; - public UnitInputPort rateRange; - public UnitInputPort amplitude; - public UnitInputPort amplitudeRange; - public UnitInputPort density; - public UnitInputPort duration; - public UnitInputPort durationRange; - public UnitOutputPort output; - - PseudoRandom randomizer; - private GrainState[] states; - private double countScaler = 1.0; - private final GrainScheduler scheduler = new StochasticGrainScheduler(); - - public GrainFarm() { - randomizer = new PseudoRandom(); - addPort(rate = new UnitInputPort("Rate", 1.0)); - addPort(amplitude = new UnitInputPort("Amplitude", 1.0)); - addPort(duration = new UnitInputPort("Duration", 0.01)); - addPort(rateRange = new UnitInputPort("RateRange", 0.0)); - addPort(amplitudeRange = new UnitInputPort("AmplitudeRange", 0.0)); - addPort(durationRange = new UnitInputPort("DurationRange", 0.0)); - addPort(density = new UnitInputPort("Density", 0.1)); - addPort(output = new UnitOutputPort()); - } - - private class GrainState { - Grain grain; - int countdown; - double lastDuration; - final static int STATE_IDLE = 0; - final static int STATE_GAP = 1; - final static int STATE_RUNNING = 2; - int state = STATE_IDLE; - private double gapError; - - public double next(int i) { - double output = 0.0; - if (state == STATE_RUNNING) { - if (grain.hasMoreValues()) { - output = grain.next(); - } else { - startGap(i); - } - } else if (state == STATE_GAP) { - if (countdown > 0) { - countdown -= 1; - } else if (countdown == 0) { - state = STATE_RUNNING; - grain.reset(); - - setupGrain(grain, i); - - double dur = nextDuration(i); - grain.setDuration(dur); - } - } else if (state == STATE_IDLE) { - nextDuration(i); // initialize lastDuration - startGap(i); - } - return output; - } - - private double nextDuration(int i) { - double dur = duration.getValues()[i]; - dur = scheduler.nextDuration(dur); - lastDuration = dur; - return dur; - } - - private void startGap(int i) { - state = STATE_GAP; - double dens = density.getValues()[i]; - double gap = scheduler.nextGap(lastDuration, dens) * getFrameRate(); - gap += gapError; - countdown = (int) gap; - gapError = gap - countdown; - } - } - - public void setGrainArray(Grain[] grains) { - countScaler = 1.0 / grains.length; - states = new GrainState[grains.length]; - for (int i = 0; i < states.length; i++) { - states[i] = new GrainState(); - states[i].grain = grains[i]; - grains[i].setFrameRate(getSynthesisEngine().getFrameRate()); - } - } - - public void setupGrain(Grain grain, int i) { - double temp = rate.getValues()[i] * calculateOctaveScaler(rateRange.getValues()[i]); - grain.setRate(temp); - - // Scale the amplitude range so that we never go above - // original amplitude. - double base = amplitude.getValues()[i]; - double offset = base * Math.random() * amplitudeRange.getValues()[i]; - grain.setAmplitude(base - offset); - } - - public void allocate(int numGrains) { - Grain[] grainArray = new Grain[numGrains]; - for (int i = 0; i < numGrains; i++) { - Grain grain = new Grain(new GrainSourceSine(), new RaisedCosineEnvelope()); - grainArray[i] = grain; - } - setGrainArray(grainArray); - } - - @Override - public UnitOutputPort getOutput() { - return output; - } - - private double calculateOctaveScaler(double rangeValue) { - double octaveRange = 0.5 * randomizer.nextRandomDouble() * rangeValue; - return Math.pow(2.0, octaveRange); - } - - @Override - public void generate(int start, int limit) { - double[] outputs = output.getValues(); - double[] amplitudes = amplitude.getValues(); - // double frp = getSynthesisEngine().getFramePeriod(); - for (int i = start; i < limit; i++) { - double result = 0.0; - - // Mix the grains together. - for (GrainState grainState : states) { - result += grainState.next(i); - } - - outputs[i] = result * amplitudes[i] * countScaler; - } - - } -} |