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 package com.sun.media.sound; 26 27 import java.util.Arrays; 28 29 import javax.sound.sampled.AudioFormat; 30 31 /** 32 * This class is used to store audio buffer. 33 * 34 * @author Karl Helgason 35 */ 36 public final class SoftAudioBuffer { 37 38 private int size; 39 private float[] buffer; 40 private boolean empty = true; 41 private AudioFormat format; 42 private AudioFloatConverter converter; 43 private byte[] converter_buffer; 44 45 public SoftAudioBuffer(int size, AudioFormat format) { 46 this.size = size; 47 this.format = format; 48 converter = AudioFloatConverter.getConverter(format); 49 } 50 51 public void swap(SoftAudioBuffer swap) 52 { 53 int bak_size = size; 54 float[] bak_buffer = buffer; 55 boolean bak_empty = empty; 56 AudioFormat bak_format = format; 57 AudioFloatConverter bak_converter = converter; 58 byte[] bak_converter_buffer = converter_buffer; 59 60 size = swap.size; 61 buffer = swap.buffer; 62 empty = swap.empty; 63 format = swap.format; 64 converter = swap.converter; 65 converter_buffer = swap.converter_buffer; 66 67 swap.size = bak_size; 68 swap.buffer = bak_buffer; 69 swap.empty = bak_empty; 70 swap.format = bak_format; 71 swap.converter = bak_converter; 72 swap.converter_buffer = bak_converter_buffer; 73 } 74 75 public AudioFormat getFormat() { 76 return format; 77 } 78 79 public int getSize() { 80 return size; 81 } 82 83 public void clear() { 84 if (!empty) { 85 Arrays.fill(buffer, 0); 86 empty = true; 87 } 88 } 89 90 public boolean isSilent() { 91 return empty; 92 } 93 94 public float[] array() { 95 empty = false; 96 if (buffer == null) 97 buffer = new float[size]; 98 return buffer; 99 } 100 101 public void get(byte[] buffer, int channel) { 102 103 int framesize_pc = (format.getFrameSize() / format.getChannels()); 104 int c_len = size * framesize_pc; 105 if (converter_buffer == null || converter_buffer.length < c_len) 106 converter_buffer = new byte[c_len]; 107 108 if (format.getChannels() == 1) { 109 converter.toByteArray(array(), size, buffer); 110 } else { 111 converter.toByteArray(array(), size, converter_buffer); 112 if (channel >= format.getChannels()) 113 return; 114 int z_stepover = format.getChannels() * framesize_pc; 115 int k_stepover = framesize_pc; 116 for (int j = 0; j < framesize_pc; j++) { 117 int k = j; 118 int z = channel * framesize_pc + j; 119 for (int i = 0; i < size; i++) { 120 buffer[z] = converter_buffer[k]; 121 z += z_stepover; 122 k += k_stepover; 123 } 124 } 125 } 126 127 } 128 }