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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 | } | ||