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 sun.audio;
  27 
  28 import java.io.InputStream;
  29 import java.io.FilterInputStream;
  30 import java.io.BufferedInputStream;
  31 import java.io.IOException;
  32 
  33 import javax.sound.sampled.*;
  34 import javax.sound.midi.*;
  35 
  36 /**
  37  * Convert an InputStream to an AudioStream.
  38  *
  39  */
  40 
  41 
  42 public final class AudioStream extends FilterInputStream {
  43 
  44     // AudioContainerInputStream acis;
  45     AudioInputStream ais = null;
  46     AudioFormat format = null;
  47     MidiFileFormat midiformat = null;
  48     InputStream stream = null;
  49 
  50 
  51     /*
  52      * create the AudioStream; if we survive without throwing
  53      * an exception, we should now have some subclass of
  54      * ACIS with all the header info already read
  55      */
  56 
  57     public AudioStream(InputStream in) throws IOException {
  58 
  59         super(in);
  60 
  61         stream = in;
  62 
  63         if( in.markSupported() == false ) {
  64 
  65             stream = new BufferedInputStream( in, 1024 );
  66         }
  67 
  68         try {
  69             ais = AudioSystem.getAudioInputStream( stream );
  70             format = ais.getFormat();
  71             this.in = ais;
  72 
  73         } catch (UnsupportedAudioFileException e ) {
  74 
  75             // not an audio file, see if it's midi...
  76             try {
  77                 midiformat = MidiSystem.getMidiFileFormat( stream );
  78 
  79             } catch (InvalidMidiDataException e1) {
  80                 throw new IOException("could not create audio stream from input stream");
  81             }
  82         }
  83     }
  84 
  85 
  86 
  87 
  88     /**
  89      * A blocking read.
  90      */
  91     /*    public int read(byte buf[], int pos, int len) throws IOException {
  92 
  93           return(acis.readFully(buf, pos, len));
  94           }
  95     */
  96 
  97     /**
  98      * Get the data.
  99      */
 100     public AudioData getData() throws IOException {
 101         int length = getLength();
 102 
 103         //limit the memory to 1M, so too large au file won't load
 104         if (length < 1024*1024) {
 105             byte [] buffer = new byte[length];
 106             try {
 107                 ais.read(buffer, 0, length);
 108             } catch (IOException ex) {
 109                 throw new IOException("Could not create AudioData Object");
 110             }
 111             return new AudioData(format, buffer);
 112         }
 113 
 114         /*              acis.setData();
 115 
 116                         if (acis.stream instanceof ByteArrayInputStream) {
 117                         Format[] format = acis.getFormat();
 118                         byte[] bytes = acis.getBytes();
 119                         if (bytes == null)
 120                         throw new IOException("could not create AudioData object: no data received");
 121                         return new AudioData((AudioFormat)format[0], bytes);
 122                         }
 123         */
 124 
 125         throw new IOException("could not create AudioData object");
 126     }
 127 
 128 
 129     public int getLength() {
 130 
 131         if( ais != null && format != null ) {
 132             return (int) (ais.getFrameLength() *
 133                           ais.getFormat().getFrameSize() );
 134 
 135         } else if ( midiformat != null ) {
 136             return (int) midiformat.getByteLength();
 137 
 138         } else {
 139             return -1;
 140         }
 141     }
 142 }