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/* * Voicesmith <http://voicesmith.jurihock.de/> *//from w w w.j a v a 2 s . c o m * Copyright (c) 2011-2014 Juergen Hock * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program 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 for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package de.jurihock.voicesmith.io.oscillators; import static de.jurihock.voicesmith.dsp.Math.cos; import android.content.Context; public final class CosineWave extends PhaseAccumulator { public CosineWave(Context context, int frequency) { super(context, frequency); } public CosineWave(Context context, int sampleRate, int frequency) { super(context, sampleRate, frequency); } public int read(float[] buffer, int offset, int count) { if (count == 0) return 0; for (int i = 0; i < count; i++) { buffer[i + offset] = cos(getNextPhase()); } return count; } @Override public int read(short[] buffer, int offset, int count) { if (count == 0) return 0; final float amp = 32767F / 3; // TODO: Cosine amplitude getter/setter. for (int i = 0; i < count; i++) { buffer[i + offset] = (short) (amp * cos(getNextPhase())); } return count; } }