/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tika.parser.audio;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map.Entry;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.UnsupportedAudioFileException;
import org.apache.tika.exception.TikaException;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.parser.Parser;
import org.apache.tika.sax.XHTMLContentHandler;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
public class AudioParser implements Parser {
public void parse(
InputStream stream, ContentHandler handler, Metadata metadata)
throws IOException, SAXException, TikaException {
XHTMLContentHandler xhtml = new XHTMLContentHandler(handler, metadata);
xhtml.startDocument();
// AudioSystem expects the stream to support the mark feature
InputStream buffered = new BufferedInputStream(stream);
try {
AudioFormat format =
AudioSystem.getAudioFileFormat(buffered).getFormat();
float rate = format.getSampleRate();
if (rate != AudioSystem.NOT_SPECIFIED) {
metadata.set("samplerate", String.valueOf(rate));
}
int channels = format.getChannels();
if (channels != AudioSystem.NOT_SPECIFIED) {
metadata.set("channels", String.valueOf(channels));
}
int bits = format.getSampleSizeInBits();
if (bits != AudioSystem.NOT_SPECIFIED) {
metadata.set("bits", String.valueOf(bits));
}
metadata.set("encoding", format.getEncoding().toString());
// Javadoc suggests that some of the following properties might
// be available, but I had no success in finding any:
// "duration" Long playback duration of the file in microseconds
// "author" String name of the author of this file
// "title" String title of this file
// "copyright" String copyright message
// "date" Date date of the recording or release
// "comment" String an arbitrary text
for (Entry<String, Object> entry : format.properties().entrySet()) {
metadata.set(entry.getKey(), entry.getValue().toString());
}
} catch (UnsupportedAudioFileException e) {
// There is no way to know whether this exception was
// caused by the document being corrupted or by the format
// just being unsupported. So we do nothing.
}
xhtml.endDocument();
}
}