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src/java.desktop/share/classes/com/sun/media/sound/SunFileReader.java

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   1 /*
   2  * Copyright (c) 1999, 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.io.File;
  29 import java.io.InputStream;
  30 import java.io.IOException;
  31 import java.io.DataInputStream;
  32 import java.net.URL;
  33 
  34 import javax.sound.sampled.AudioFileFormat;
  35 import javax.sound.sampled.AudioInputStream;
  36 import javax.sound.sampled.UnsupportedAudioFileException;
  37 import javax.sound.sampled.spi.AudioFileReader;
  38 
  39 
  40 
  41 /**
  42  * Abstract File Reader class.
  43  *
  44  * @author Jan Borgersen
  45  */
  46 abstract class SunFileReader extends AudioFileReader {
  47 
  48     // buffer size for temporary input streams
  49     protected static final int bisBufferSize = 4096;
  50 
  51     /**
  52      * Constructs a new SunFileReader object.
  53      */
  54     SunFileReader() {
  55     }
  56 
  57 
  58     // METHODS TO IMPLEMENT AudioFileReader
  59 
  60     /**
  61      * Obtains the audio file format of the input stream provided.  The stream must
  62      * point to valid audio file data.  In general, audio file providers may
  63      * need to read some data from the stream before determining whether they
  64      * support it.  These parsers must
  65      * be able to mark the stream, read enough data to determine whether they
  66      * support the stream, and, if not, reset the stream's read pointer to its original
  67      * position.  If the input stream does not support this, this method may fail
  68      * with an IOException.
  69      * @param stream the input stream from which file format information should be
  70      * extracted
  71      * @return an <code>AudioFileFormat</code> object describing the audio file format
  72      * @throws UnsupportedAudioFileException if the stream does not point to valid audio
  73      * file data recognized by the system
  74      * @throws IOException if an I/O exception occurs
  75      * @see InputStream#markSupported
  76      * @see InputStream#mark
  77      */
  78     abstract public AudioFileFormat getAudioFileFormat(InputStream stream) throws UnsupportedAudioFileException, IOException;
  79 
  80 
  81     /**
  82      * Obtains the audio file format of the URL provided.  The URL must
  83      * point to valid audio file data.
  84      * @param url the URL from which file format information should be
  85      * extracted
  86      * @return an <code>AudioFileFormat</code> object describing the audio file format
  87      * @throws UnsupportedAudioFileException if the URL does not point to valid audio
  88      * file data recognized by the system
  89      * @throws IOException if an I/O exception occurs
  90      */
  91     abstract public AudioFileFormat getAudioFileFormat(URL url) throws UnsupportedAudioFileException, IOException;
  92 
  93 
  94     /**
  95      * Obtains the audio file format of the File provided.  The File must
  96      * point to valid audio file data.
  97      * @param file the File from which file format information should be
  98      * extracted
  99      * @return an <code>AudioFileFormat</code> object describing the audio file format
 100      * @throws UnsupportedAudioFileException if the File does not point to valid audio
 101      * file data recognized by the system
 102      * @throws IOException if an I/O exception occurs
 103      */
 104     abstract public AudioFileFormat getAudioFileFormat(File file) throws UnsupportedAudioFileException, IOException;
 105 
 106 
 107     /**
 108      * Obtains an audio stream from the input stream provided.  The stream must
 109      * point to valid audio file data.  In general, audio file providers may
 110      * need to read some data from the stream before determining whether they
 111      * support it.  These parsers must
 112      * be able to mark the stream, read enough data to determine whether they
 113      * support the stream, and, if not, reset the stream's read pointer to its original
 114      * position.  If the input stream does not support this, this method may fail
 115      * with an IOException.
 116      * @param stream the input stream from which the <code>AudioInputStream</code> should be
 117      * constructed
 118      * @return an <code>AudioInputStream</code> object based on the audio file data contained
 119      * in the input stream.
 120      * @throws UnsupportedAudioFileException if the stream does not point to valid audio
 121      * file data recognized by the system
 122      * @throws IOException if an I/O exception occurs
 123      * @see InputStream#markSupported
 124      * @see InputStream#mark
 125      */
 126     abstract public AudioInputStream getAudioInputStream(InputStream stream) throws UnsupportedAudioFileException, IOException;
 127 
 128 
 129     /**
 130      * Obtains an audio stream from the URL provided.  The URL must
 131      * point to valid audio file data.
 132      * @param url the URL for which the <code>AudioInputStream</code> should be
 133      * constructed
 134      * @return an <code>AudioInputStream</code> object based on the audio file data pointed
 135      * to by the URL
 136      * @throws UnsupportedAudioFileException if the URL does not point to valid audio
 137      * file data recognized by the system
 138      * @throws IOException if an I/O exception occurs
 139      */
 140     abstract public AudioInputStream getAudioInputStream(URL url) throws UnsupportedAudioFileException, IOException;

 141 

 142 
 143     /**
 144      * Obtains an audio stream from the File provided.  The File must
 145      * point to valid audio file data.
 146      * @param file the File for which the <code>AudioInputStream</code> should be
 147      * constructed
 148      * @return an <code>AudioInputStream</code> object based on the audio file data pointed
 149      * to by the File
 150      * @throws UnsupportedAudioFileException if the File does not point to valid audio
 151      * file data recognized by the system
 152      * @throws IOException if an I/O exception occurs
 153      */
 154     abstract public AudioInputStream getAudioInputStream(File file) throws UnsupportedAudioFileException, IOException;
 155 
 156 
 157     // HELPER METHODS
 158 
 159 

 160 
 161     /**
 162      * rllong
 163      * Protected helper method to read 64 bits and changing the order of
 164      * each bytes.
 165      * @param DataInputStream
 166      * @return 32 bits swapped value.
 167      * @exception IOException
 168      */
 169     final int rllong(DataInputStream dis) throws IOException {
 170 
 171         int b1, b2, b3, b4 ;
 172         int i = 0;
 173 
 174         i = dis.readInt();
 175 
 176         b1 = ( i & 0xFF ) << 24 ;
 177         b2 = ( i & 0xFF00 ) << 8;
 178         b3 = ( i & 0xFF0000 ) >> 8;
 179         b4 = ( i & 0xFF000000 ) >>> 24;


   1 /*
   2  * Copyright (c) 1999, 2015, 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.io.BufferedInputStream;
  29 import java.io.DataInputStream;
  30 import java.io.File;
  31 import java.io.FileInputStream;
  32 import java.io.IOException;
  33 import java.io.InputStream;
  34 import java.net.URL;
  35 
  36 import javax.sound.sampled.AudioFileFormat;
  37 import javax.sound.sampled.AudioInputStream;
  38 import javax.sound.sampled.UnsupportedAudioFileException;
  39 import javax.sound.sampled.spi.AudioFileReader;
  40 


  41 /**
  42  * Abstract File Reader class.
  43  *
  44  * @author Jan Borgersen
  45  */
  46 abstract class SunFileReader extends AudioFileReader {
  47 
  48     @Override
  49     public final AudioFileFormat getAudioFileFormat(final InputStream stream)
  50             throws UnsupportedAudioFileException, IOException {
  51         stream.mark(200);
  52         try {
  53             return getAudioFileFormatImpl(stream);
  54         } finally {
  55             // According to specification the following is not strictly
  56             // necessary, if we got correct format. But it was implemented like
  57             // that in 1.3.0 - 1.8. So I leave it as it was, but it seems
  58             // specification should be updated.
  59             stream.reset();
  60         }
  61     }
  62 
  63     @Override
  64     public final AudioFileFormat getAudioFileFormat(final URL url)
  65             throws UnsupportedAudioFileException, IOException {
  66         try (InputStream is = url.openStream()) {
  67             return getAudioFileFormatImpl(new BufferedInputStream(is));
  68         }
  69     }
  70 
  71     @Override
  72     public final AudioFileFormat getAudioFileFormat(final File file)
  73             throws UnsupportedAudioFileException, IOException {
  74         try (InputStream is = new FileInputStream(file)) {
  75             return getAudioFileFormatImpl(new BufferedInputStream(is));
  76         }
  77     }
  78 
  79     @Override
  80     public AudioInputStream getAudioInputStream(final InputStream stream)
  81             throws UnsupportedAudioFileException, IOException {
  82         stream.mark(200);
  83         try {
  84             final AudioFileFormat fileFormat = getAudioFileFormatImpl(stream);
  85             // we've got everything, the stream is supported and it is at the
  86             // beginning of the audio data, so return an AudioInputStream
  87             return new AudioInputStream(stream, fileFormat.getFormat(),
  88                                         fileFormat.getFrameLength());
  89         } catch (final UnsupportedAudioFileException e) {
  90             stream.reset();
  91             throw e;
  92         }
  93     }
  94 
  95     @Override
  96     public final AudioInputStream getAudioInputStream(final URL url)
  97             throws UnsupportedAudioFileException, IOException {
  98         final InputStream urlStream = url.openStream();
  99         try {
 100             return getAudioInputStream(new BufferedInputStream(urlStream));
 101         } catch (final Throwable e) {
 102             closeSilently(urlStream);
 103             throw e;
 104         }
 105     }
 106 
 107     @Override
 108     public final AudioInputStream getAudioInputStream(final File file)
 109             throws UnsupportedAudioFileException, IOException {
 110         final InputStream fileStream = new FileInputStream(file);
 111         try {
 112             return getAudioInputStream(new BufferedInputStream(fileStream));
 113         } catch (final Throwable e) {
 114             closeSilently(fileStream);
 115             throw e;
 116         }
 117     }
 118 
 119     /**
 120      * Obtains the audio file format of the input stream provided. The stream
 121      * must point to valid audio file data. Note that default implementation of
 122      * {@link #getAudioInputStream(InputStream)} assume that this method leaves
 123      * the input stream at the beginning of the audio data.
 124      *
 125      * @param  stream the input stream from which file format information should
 126      *         be extracted
 127      * @return an {@code AudioFileFormat} object describing the audio file
 128      *         format
 129      * @throws UnsupportedAudioFileException if the stream does not point to
 130      *         valid audio file data recognized by the system







 131      * @throws IOException if an I/O exception occurs
 132      */
 133     abstract AudioFileFormat getAudioFileFormatImpl(InputStream stream)
 134             throws UnsupportedAudioFileException, IOException;
 135 
 136     // HELPER METHODS
 137 
 138     /**
 139      * Closes the InputStream when we have read all necessary data from it, and
 140      * ignores an IOException.
 141      *
 142      * @param is the InputStream which should be closed





 143      */
 144     private static void closeSilently(final InputStream is) {
 145         try {
 146             is.close();
 147         } catch (final IOException ignored) {
 148             // IOException is ignored
 149         }
 150     }
 151 
 152     /**
 153      * rllong
 154      * Protected helper method to read 64 bits and changing the order of
 155      * each bytes.
 156      * @param DataInputStream
 157      * @return 32 bits swapped value.
 158      * @exception IOException
 159      */
 160     final int rllong(DataInputStream dis) throws IOException {
 161 
 162         int b1, b2, b3, b4 ;
 163         int i = 0;
 164 
 165         i = dis.readInt();
 166 
 167         b1 = ( i & 0xFF ) << 24 ;
 168         b2 = ( i & 0xFF00 ) << 8;
 169         b3 = ( i & 0xFF0000 ) >> 8;
 170         b4 = ( i & 0xFF000000 ) >>> 24;


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