129 lines
3.9 KiB
Java
129 lines
3.9 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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import java.util.Arrays;
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import javax.sound.sampled.AudioFormat;
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/**
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* This class is used to store audio buffer.
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*
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* @author Karl Helgason
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*/
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public final class SoftAudioBuffer {
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private int size;
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private float[] buffer;
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private boolean empty = true;
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private AudioFormat format;
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private AudioFloatConverter converter;
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private byte[] converter_buffer;
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public SoftAudioBuffer(int size, AudioFormat format) {
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this.size = size;
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this.format = format;
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converter = AudioFloatConverter.getConverter(format);
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}
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public void swap(SoftAudioBuffer swap)
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{
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int bak_size = size;
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float[] bak_buffer = buffer;
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boolean bak_empty = empty;
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AudioFormat bak_format = format;
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AudioFloatConverter bak_converter = converter;
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byte[] bak_converter_buffer = converter_buffer;
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size = swap.size;
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buffer = swap.buffer;
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empty = swap.empty;
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format = swap.format;
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converter = swap.converter;
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converter_buffer = swap.converter_buffer;
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swap.size = bak_size;
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swap.buffer = bak_buffer;
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swap.empty = bak_empty;
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swap.format = bak_format;
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swap.converter = bak_converter;
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swap.converter_buffer = bak_converter_buffer;
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}
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public AudioFormat getFormat() {
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return format;
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}
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public int getSize() {
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return size;
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}
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public void clear() {
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if (!empty) {
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Arrays.fill(buffer, 0);
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empty = true;
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}
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}
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public boolean isSilent() {
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return empty;
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}
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public float[] array() {
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empty = false;
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if (buffer == null)
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buffer = new float[size];
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return buffer;
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}
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public void get(byte[] buffer, int channel) {
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int framesize_pc = (format.getFrameSize() / format.getChannels());
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int c_len = size * framesize_pc;
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if (converter_buffer == null || converter_buffer.length < c_len)
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converter_buffer = new byte[c_len];
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if (format.getChannels() == 1) {
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converter.toByteArray(array(), size, buffer);
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} else {
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converter.toByteArray(array(), size, converter_buffer);
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if (channel >= format.getChannels())
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return;
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int z_stepover = format.getChannels() * framesize_pc;
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int k_stepover = framesize_pc;
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for (int j = 0; j < framesize_pc; j++) {
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int k = j;
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int z = channel * framesize_pc + j;
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for (int i = 0; i < size; i++) {
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buffer[z] = converter_buffer[k];
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z += z_stepover;
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k += k_stepover;
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}
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}
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}
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}
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}
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