/*
* Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.sun.media.sound;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioFormat.Encoding;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.UnsupportedAudioFileException;
import javax.sound.sampled.spi.AudioFileReader;
/**
* Floating-point encoded (format 3) WAVE file loader.
*
* @author Karl Helgason
*/
public final class WaveFloatFileReader extends AudioFileReader {
public AudioFileFormat getAudioFileFormat(InputStream stream)
throws UnsupportedAudioFileException, IOException {
stream.mark(200);
AudioFileFormat format;
try {
format = internal_getAudioFileFormat(stream);
} finally {
stream.reset();
}
return format;
}
private AudioFileFormat internal_getAudioFileFormat(InputStream stream)
throws UnsupportedAudioFileException, IOException {
RIFFReader riffiterator = new RIFFReader(stream);
if (!riffiterator.getFormat().equals("RIFF"))
throw new UnsupportedAudioFileException();
if (!riffiterator.getType().equals("WAVE"))
throw new UnsupportedAudioFileException();
boolean fmt_found = false;
boolean data_found = false;
int channels = 1;
long samplerate = 1;
int framesize = 1;
int bits = 1;
while (riffiterator.hasNextChunk()) {
RIFFReader chunk = riffiterator.nextChunk();
if (chunk.getFormat().equals("fmt ")) {
fmt_found = true;
int format = chunk.readUnsignedShort();
if (format != 3) // WAVE_FORMAT_IEEE_FLOAT only
throw new UnsupportedAudioFileException();
channels = chunk.readUnsignedShort();
samplerate = chunk.readUnsignedInt();
/* framerate = */chunk.readUnsignedInt();
framesize = chunk.readUnsignedShort();
bits = chunk.readUnsignedShort();
}
if (chunk.getFormat().equals("data")) {
data_found = true;
break;
}
}
if (!fmt_found)
throw new UnsupportedAudioFileException();
if (!data_found)
throw new UnsupportedAudioFileException();
AudioFormat audioformat = new AudioFormat(
Encoding.PCM_FLOAT, samplerate, bits, channels,
framesize, samplerate, false);
AudioFileFormat fileformat = new AudioFileFormat(
AudioFileFormat.Type.WAVE, audioformat,
AudioSystem.NOT_SPECIFIED);
return fileformat;
}
public AudioInputStream getAudioInputStream(InputStream stream)
throws UnsupportedAudioFileException, IOException {
AudioFileFormat format = getAudioFileFormat(stream);
RIFFReader riffiterator = new RIFFReader(stream);
if (!riffiterator.getFormat().equals("RIFF"))
throw new UnsupportedAudioFileException();
if (!riffiterator.getType().equals("WAVE"))
throw new UnsupportedAudioFileException();
while (riffiterator.hasNextChunk()) {
RIFFReader chunk = riffiterator.nextChunk();
if (chunk.getFormat().equals("data")) {
return new AudioInputStream(chunk, format.getFormat(),
chunk.getSize());
}
}
throw new UnsupportedAudioFileException();
}
public AudioFileFormat getAudioFileFormat(URL url)
throws UnsupportedAudioFileException, IOException {
InputStream stream = url.openStream();
AudioFileFormat format;
try {
format = getAudioFileFormat(new BufferedInputStream(stream));
} finally {
stream.close();
}
return format;
}
public AudioFileFormat getAudioFileFormat(File file)
throws UnsupportedAudioFileException, IOException {
InputStream stream = new FileInputStream(file);
AudioFileFormat format;
try {
format = getAudioFileFormat(new BufferedInputStream(stream));
} finally {
stream.close();
}
return format;
}
public AudioInputStream getAudioInputStream(URL url)
throws UnsupportedAudioFileException, IOException {
return getAudioInputStream(new BufferedInputStream(url.openStream()));
}
public AudioInputStream getAudioInputStream(File file)
throws UnsupportedAudioFileException, IOException {
return getAudioInputStream(new BufferedInputStream(new FileInputStream(
file)));
}
}