1 /* 2 * Copyright (c) 2016, 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 javax.sound.sampled.AudioFileFormat; 29 import javax.sound.sampled.AudioFormat; 30 import javax.sound.sampled.AudioSystem; 31 32 /** 33 * An instance of the {@code StandardFileFormat} describes the file's length in 34 * bytes and the length in sample frames as longs. This will provide an 35 * additional precision unlike the {@code AudioFileFormat}. 36 */ 37 class StandardFileFormat extends AudioFileFormat { 38 39 /** 40 * File length in bytes stored as long. 41 */ 42 private final long byteLength; 43 44 /** 45 * Audio data length in sample frames stored as long. 46 */ 47 private final long frameLength; 48 49 /** 50 * Constructs {@code StandardFileFormat} object. 51 * 52 * @param type the type of the audio file 53 * @param format the format of the audio data contained in the file 54 * @param frameLength the audio data length in sample frames, or 55 * {@code AudioSystem.NOT_SPECIFIED} 56 */ 57 StandardFileFormat(final Type type, final AudioFormat format, 58 final long frameLength) { 59 this(type, AudioSystem.NOT_SPECIFIED, format, frameLength); 60 } 61 62 /** 63 * Constructs {@code StandardFileFormat} object. 64 * 65 * @param type the type of the audio file 66 * @param byteLength the length of the file in bytes, or 67 * {@code AudioSystem.NOT_SPECIFIED} 68 * @param format the format of the audio data contained in the file 69 * @param frameLength the audio data length in sample frames, or 70 * {@code AudioSystem.NOT_SPECIFIED} 71 */ 72 StandardFileFormat(final Type type, final long byteLength, 73 final AudioFormat format, final long frameLength) { 74 super(type, clip(byteLength), format, clip(frameLength)); 75 this.byteLength = byteLength; 76 this.frameLength = frameLength; 77 } 78 79 /** 80 * Replaces the passed value to {@code AudioSystem.NOT_SPECIFIED} if the 81 * value is greater than {@code Integer.MAX_VALUE}. 82 * 83 * @param value which should be clipped 84 * @return the clipped value 85 */ 86 private static int clip(final long value) { 87 if (value > Integer.MAX_VALUE) { 88 return AudioSystem.NOT_SPECIFIED; 89 } 90 return (int) value; 91 } 92 93 /** 94 * Obtains the length of the audio data contained in the file, expressed in 95 * sample frames. The long precision is used. 96 * 97 * @return the number of sample frames of audio data in the file 98 * @see AudioSystem#NOT_SPECIFIED 99 */ 100 public final long getLongFrameLength() { 101 return frameLength; 102 } 103 104 /** 105 * Obtains the size in bytes of the entire audio file (not just its audio 106 * data). The long precision is used. 107 * 108 * @return the audio file length in bytes 109 * @see AudioSystem#NOT_SPECIFIED 110 */ 111 public final long getLongByteLength() { 112 return byteLength; 113 } 114 }