1 /*
   2  * Copyright (c) 2007, 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 java.io.IOException;
  29 import java.io.InputStream;
  30 
  31 import javax.sound.sampled.AudioFileFormat;
  32 import javax.sound.sampled.AudioFormat;
  33 import javax.sound.sampled.AudioFormat.Encoding;
  34 import javax.sound.sampled.AudioInputStream;
  35 import javax.sound.sampled.AudioSystem;
  36 import javax.sound.sampled.UnsupportedAudioFileException;
  37 
  38 /**
  39  * Floating-point encoded (format 3) WAVE file loader.
  40  *
  41  * @author Karl Helgason
  42  */
  43 public final class WaveFloatFileReader extends SunFileReader {
  44 
  45     @Override
  46     AudioFileFormat getAudioFileFormatImpl(final InputStream stream)
  47             throws UnsupportedAudioFileException, IOException {
  48 
  49         RIFFReader riffiterator = new RIFFReader(stream);
  50         if (!riffiterator.getFormat().equals("RIFF"))
  51             throw new UnsupportedAudioFileException();
  52         if (!riffiterator.getType().equals("WAVE"))
  53             throw new UnsupportedAudioFileException();
  54 
  55         boolean fmt_found = false;
  56         boolean data_found = false;
  57 
  58         int channels = 1;
  59         long samplerate = 1;
  60         int framesize = 1;
  61         int bits = 1;
  62 
  63         while (riffiterator.hasNextChunk()) {
  64             RIFFReader chunk = riffiterator.nextChunk();
  65 
  66             if (chunk.getFormat().equals("fmt ")) {
  67                 fmt_found = true;
  68 
  69                 int format = chunk.readUnsignedShort();
  70                 if (format != WaveFileFormat.WAVE_FORMAT_IEEE_FLOAT) {
  71                     throw new UnsupportedAudioFileException();
  72                 }
  73                 channels = chunk.readUnsignedShort();
  74                 samplerate = chunk.readUnsignedInt();
  75                 /* framerate = */chunk.readUnsignedInt();
  76                 framesize = chunk.readUnsignedShort();
  77                 bits = chunk.readUnsignedShort();
  78             }
  79             if (chunk.getFormat().equals("data")) {
  80                 data_found = true;
  81                 break;
  82             }
  83         }
  84         if (!fmt_found || !data_found) {
  85             throw new UnsupportedAudioFileException();
  86         }
  87         AudioFormat audioformat = new AudioFormat(
  88                 Encoding.PCM_FLOAT, samplerate, bits, channels,
  89                 framesize, samplerate, false);
  90         return new AudioFileFormat(AudioFileFormat.Type.WAVE, audioformat,
  91                                    AudioSystem.NOT_SPECIFIED);
  92     }
  93 
  94     @Override
  95     public AudioInputStream getAudioInputStream(final InputStream stream)
  96             throws UnsupportedAudioFileException, IOException {
  97 
  98         AudioFileFormat format = getAudioFileFormat(stream);
  99         // we've got everything, the stream is supported and it is at the
 100         // beginning of the header, so find the data chunk again and return an
 101         // AudioInputStream
 102         RIFFReader riffiterator = new RIFFReader(stream);
 103         while (riffiterator.hasNextChunk()) {
 104             RIFFReader chunk = riffiterator.nextChunk();
 105             if (chunk.getFormat().equals("data")) {
 106                 return new AudioInputStream(chunk, format.getFormat(),
 107                         chunk.getSize());
 108             }
 109         }
 110         throw new UnsupportedAudioFileException();
 111     }
 112 }