1 /* 2 * Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.media.sound; 27 28 import java.util.Arrays; 29 30 import javax.sound.sampled.AudioFormat; 31 32 /** 33 * This class is used to store audio buffer. 34 * 35 * @author Karl Helgason 36 */ 37 public final class SoftAudioBuffer { 38 39 private int size; 40 private float[] buffer; 41 private boolean empty = true; 42 private AudioFormat format; 43 private AudioFloatConverter converter; 44 private byte[] converter_buffer; 45 SoftAudioBuffer(int size, AudioFormat format)46 public SoftAudioBuffer(int size, AudioFormat format) { 47 this.size = size; 48 this.format = format; 49 converter = AudioFloatConverter.getConverter(format); 50 } 51 swap(SoftAudioBuffer swap)52 public void swap(SoftAudioBuffer swap) 53 { 54 int bak_size = size; 55 float[] bak_buffer = buffer; 56 boolean bak_empty = empty; 57 AudioFormat bak_format = format; 58 AudioFloatConverter bak_converter = converter; 59 byte[] bak_converter_buffer = converter_buffer; 60 61 size = swap.size; 62 buffer = swap.buffer; 63 empty = swap.empty; 64 format = swap.format; 65 converter = swap.converter; 66 converter_buffer = swap.converter_buffer; 67 68 swap.size = bak_size; 69 swap.buffer = bak_buffer; 70 swap.empty = bak_empty; 71 swap.format = bak_format; 72 swap.converter = bak_converter; 73 swap.converter_buffer = bak_converter_buffer; 74 } 75 getFormat()76 public AudioFormat getFormat() { 77 return format; 78 } 79 getSize()80 public int getSize() { 81 return size; 82 } 83 clear()84 public void clear() { 85 if (!empty) { 86 Arrays.fill(buffer, 0); 87 empty = true; 88 } 89 } 90 isSilent()91 public boolean isSilent() { 92 return empty; 93 } 94 array()95 public float[] array() { 96 empty = false; 97 if (buffer == null) 98 buffer = new float[size]; 99 return buffer; 100 } 101 get(byte[] buffer, int channel)102 public void get(byte[] buffer, int channel) { 103 104 int framesize_pc = (format.getFrameSize() / format.getChannels()); 105 int c_len = size * framesize_pc; 106 if (converter_buffer == null || converter_buffer.length < c_len) 107 converter_buffer = new byte[c_len]; 108 109 if (format.getChannels() == 1) { 110 converter.toByteArray(array(), size, buffer); 111 } else { 112 converter.toByteArray(array(), size, converter_buffer); 113 if (channel >= format.getChannels()) 114 return; 115 int z_stepover = format.getChannels() * framesize_pc; 116 int k_stepover = framesize_pc; 117 for (int j = 0; j < framesize_pc; j++) { 118 int k = j; 119 int z = channel * framesize_pc + j; 120 for (int i = 0; i < size; i++) { 121 buffer[z] = converter_buffer[k]; 122 z += z_stepover; 123 k += k_stepover; 124 } 125 } 126 } 127 } 128 } 129