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| 1 | +/* | |
| 2 | + * Copyright (c) 1999, 2002, 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 sun.audio; | |
| 27 | + | |
| 28 | +import java.io.*; | |
| 29 | +import javax.sound.sampled.*; | |
| 30 | + | |
| 31 | + | |
| 32 | +/** | |
| 33 | + * A clip of audio data. This data can be used to construct an | |
| 34 | + * AudioDataStream, which can be played. <p> | |
| 35 | + * | |
| 36 | + * @author Arthur van Hoff | |
| 37 | + * @author Kara Kytle | |
| 38 | + * @see AudioDataStream | |
| 39 | + * @see AudioPlayer | |
| 40 | + */ | |
| 41 | + | |
| 42 | + /* | |
| 43 | + * the idea here is that the AudioData object encapsulates the | |
| 44 | + * data you need to play an audio clip based on a defined set | |
| 45 | + * of data. to do this, you require the audio data (a byte | |
| 46 | + * array rather than an arbitrary input stream) and a format | |
| 47 | + * object. | |
| 48 | + */ | |
| 49 | + | |
| 50 | + | |
| 51 | +public class AudioData { | |
| 52 | + | |
| 53 | + private static final AudioFormat DEFAULT_FORMAT = | |
| 54 | + new AudioFormat(AudioFormat.Encoding.ULAW, | |
| 55 | + 8000, // sample rate | |
| 56 | + 8, // sample size in bits | |
| 57 | + 1, // channels | |
| 58 | + 1, // frame size in bytes | |
| 59 | + 8000, // frame rate | |
| 60 | + true ); // bigendian (irrelevant for 8-bit data) | |
| 61 | + | |
| 62 | + AudioFormat format; // carry forth the format array amusement | |
| 63 | + byte buffer[]; | |
| 64 | + | |
| 65 | + /** | |
| 66 | + * Constructor | |
| 67 | + */ | |
| 68 | + public AudioData(byte buffer[]) { | |
| 69 | + | |
| 70 | + this.buffer = buffer; | |
| 71 | + // if we cannot extract valid format information, we resort to assuming the data will be 8k mono u-law | |
| 72 | + // in order to provide maximal backwards compatibility.... | |
| 73 | + this.format = DEFAULT_FORMAT; | |
| 74 | + | |
| 75 | + // okay, we need to extract the format and the byte buffer of data | |
| 76 | + try { | |
| 77 | + AudioInputStream ais = AudioSystem.getAudioInputStream(new ByteArrayInputStream(buffer)); | |
| 78 | + this.format = ais.getFormat(); | |
| 79 | + ais.close(); | |
| 80 | + // $$fb 2002-10-27: buffer contains the file header now! | |
| 81 | + } catch (IOException e) { | |
| 82 | + // use default format | |
| 83 | + } catch (UnsupportedAudioFileException e1 ) { | |
| 84 | + // use default format | |
| 85 | + } | |
| 86 | + } | |
| 87 | + | |
| 88 | + | |
| 89 | + /** | |
| 90 | + * Non-public constructor; this is the one we use in ADS and CADS | |
| 91 | + * constructors. | |
| 92 | + */ | |
| 93 | + AudioData(AudioFormat format, byte[] buffer) { | |
| 94 | + | |
| 95 | + this.format = format; | |
| 96 | + this.buffer = buffer; | |
| 97 | + } | |
| 98 | +} | |