SoftAudioBuffer.java revision 829
829N/A/*
829N/A * Copyright 2007 Sun Microsystems, Inc. All Rights Reserved.
829N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
829N/A *
829N/A * This code is free software; you can redistribute it and/or modify it
829N/A * under the terms of the GNU General Public License version 2 only, as
829N/A * published by the Free Software Foundation. Sun designates this
829N/A * particular file as subject to the "Classpath" exception as provided
829N/A * by Sun in the LICENSE file that accompanied this code.
829N/A *
829N/A * This code is distributed in the hope that it will be useful, but WITHOUT
829N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
829N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
829N/A * version 2 for more details (a copy is included in the LICENSE file that
829N/A * accompanied this code).
829N/A *
829N/A * You should have received a copy of the GNU General Public License version
829N/A * 2 along with this work; if not, write to the Free Software Foundation,
829N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
829N/A *
829N/A * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
829N/A * CA 95054 USA or visit www.sun.com if you need additional information or
829N/A * have any questions.
829N/A */
829N/Apackage com.sun.media.sound;
829N/A
829N/Aimport java.util.Arrays;
829N/A
829N/Aimport javax.sound.sampled.AudioFormat;
829N/A
829N/A/**
829N/A * This class is used to store audio buffer.
829N/A *
829N/A * @author Karl Helgason
829N/A */
829N/Apublic class SoftAudioBuffer {
829N/A
829N/A private int size;
829N/A private float[] buffer;
829N/A private boolean empty = true;
829N/A private AudioFormat format;
829N/A private AudioFloatConverter converter;
829N/A private byte[] converter_buffer;
829N/A
829N/A public SoftAudioBuffer(int size, AudioFormat format) {
829N/A this.size = size;
829N/A this.format = format;
829N/A converter = AudioFloatConverter.getConverter(format);
829N/A }
829N/A
829N/A public AudioFormat getFormat() {
829N/A return format;
829N/A }
829N/A
829N/A public int getSize() {
829N/A return size;
829N/A }
829N/A
829N/A public void clear() {
829N/A if (!empty) {
829N/A Arrays.fill(buffer, 0);
829N/A empty = true;
829N/A }
829N/A }
829N/A
829N/A public boolean isSilent() {
829N/A return empty;
829N/A }
829N/A
829N/A public float[] array() {
829N/A empty = false;
829N/A if (buffer == null)
829N/A buffer = new float[size];
829N/A return buffer;
829N/A }
829N/A
829N/A public void get(byte[] buffer, int channel) {
829N/A
829N/A int framesize_pc = (format.getFrameSize() / format.getChannels());
829N/A int c_len = size * framesize_pc;
829N/A if (converter_buffer == null || converter_buffer.length < c_len)
829N/A converter_buffer = new byte[c_len];
829N/A
829N/A if (format.getChannels() == 1) {
829N/A converter.toByteArray(array(), size, buffer);
829N/A } else {
829N/A converter.toByteArray(array(), size, converter_buffer);
829N/A if (channel >= format.getChannels())
829N/A return;
829N/A int z_stepover = format.getChannels() * framesize_pc;
829N/A int k_stepover = framesize_pc;
829N/A for (int j = 0; j < framesize_pc; j++) {
829N/A int k = j;
829N/A int z = channel * framesize_pc + j;
829N/A for (int i = 0; i < size; i++) {
829N/A buffer[z] = converter_buffer[k];
829N/A z += z_stepover;
829N/A k += k_stepover;
829N/A }
829N/A }
829N/A }
829N/A
829N/A }
829N/A}