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.UnsupportedAudioFileException; 36 37 /** 38 * Floating-point encoded (format 3) WAVE file loader. 39 * 40 * @author Karl Helgason 41 */ 42 public final class WaveFloatFileReader extends SunFileReader { 43 44 @Override 45 StandardFileFormat getAudioFileFormatImpl(final InputStream stream) 46 throws UnsupportedAudioFileException, IOException { 47 48 RIFFReader riffiterator = new RIFFReader(stream); 49 if (!riffiterator.getFormat().equals("RIFF")) 50 throw new UnsupportedAudioFileException(); 51 if (!riffiterator.getType().equals("WAVE")) 52 throw new UnsupportedAudioFileException(); 53 54 boolean fmt_found = false; 55 boolean data_found = false; 56 57 int channels = 1; 58 long samplerate = 1; 59 int framesize = 1; 60 int bits = 1; 61 long dataSize = 0; 62 63 while (riffiterator.hasNextChunk()) { 64 RIFFReader chunk = riffiterator.nextChunk(); 65 if (chunk.getFormat().equals("fmt ")) { 66 fmt_found = true; 67 68 int format = chunk.readUnsignedShort(); 69 if (format != WaveFileFormat.WAVE_FORMAT_IEEE_FLOAT) { 70 throw new UnsupportedAudioFileException(); 71 } 72 channels = chunk.readUnsignedShort(); 73 samplerate = chunk.readUnsignedInt(); 74 /* framerate = */chunk.readUnsignedInt(); 75 framesize = chunk.readUnsignedShort(); 76 bits = chunk.readUnsignedShort(); 77 } 78 if (chunk.getFormat().equals("data")) { 79 dataSize = chunk.getSize(); 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 StandardFileFormat(AudioFileFormat.Type.WAVE, audioformat, 91 dataSize / audioformat.getFrameSize()); 92 } 93 94 @Override 95 public AudioInputStream getAudioInputStream(final InputStream stream) 96 throws UnsupportedAudioFileException, IOException { 97 98 final StandardFileFormat format = getAudioFileFormat(stream); 99 final AudioFormat af = format.getFormat(); 100 final long length = format.getLongFrameLength(); 101 // we've got everything, the stream is supported and it is at the 102 // beginning of the header, so find the data chunk again and return an 103 // AudioInputStream 104 final RIFFReader riffiterator = new RIFFReader(stream); 105 while (riffiterator.hasNextChunk()) { 106 RIFFReader chunk = riffiterator.nextChunk(); 107 if (chunk.getFormat().equals("data")) { 108 return new AudioInputStream(chunk, af, length); 109 } 110 } 111 throw new UnsupportedAudioFileException(); 112 } 113 }