1 /*

     2  * Copyright (c) 1999, 2014, 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 midiformat.getByteLength();

   137 

   138         } else {

   139             return -1;

   140         }

   141     }

   142 }