/*
* 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.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;
import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.UnsupportedAudioFileException;
import javax.sound.sampled.AudioFileFormat.Type;
import org.apache.tika.exception.TikaException;
import org.apache.tika.metadata.Metadata;
import org.apache.tika.metadata.XMPDM;
import org.apache.tika.mime.MediaType;
import org.apache.tika.parser.AbstractParser;
import org.apache.tika.parser.ParseContext;
import org.apache.tika.sax.XHTMLContentHandler;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
public class AudioParser extends AbstractParser {
private static final Set<MediaType> SUPPORTED_TYPES =
Collections.unmodifiableSet(new HashSet<MediaType>(Arrays.asList(
MediaType.audio("basic"),
MediaType.audio("x-wav"),
MediaType.audio("x-aiff"))));
public Set<MediaType> getSupportedTypes(ParseContext context) {
return SUPPORTED_TYPES;
}
public void parse(
InputStream stream, ContentHandler handler,
Metadata metadata, ParseContext context)
throws IOException, SAXException, TikaException {
// AudioSystem expects the stream to support the mark feature
if (!stream.markSupported()) {
stream = new BufferedInputStream(stream);
}
try {
AudioFileFormat fileFormat = AudioSystem.getAudioFileFormat(stream);
Type type = fileFormat.getType();
if (type == Type.AIFC || type == Type.AIFF) {
metadata.set(Metadata.CONTENT_TYPE, "audio/x-aiff");
} else if (type == Type.AU || type == Type.SND) {
metadata.set(Metadata.CONTENT_TYPE, "audio/basic");
} else if (type == Type.WAVE) {
metadata.set(Metadata.CONTENT_TYPE, "audio/x-wav");
}
AudioFormat audioFormat = fileFormat.getFormat();
int channels = audioFormat.getChannels();
if (channels != AudioSystem.NOT_SPECIFIED) {
metadata.set("channels", String.valueOf(channels));
// TODO: Use XMPDM.TRACKS? (see also frame rate in AudioFormat)
}
float rate = audioFormat.getSampleRate();
if (rate != AudioSystem.NOT_SPECIFIED) {
metadata.set("samplerate", String.valueOf(rate));
metadata.set(
XMPDM.AUDIO_SAMPLE_RATE,
Integer.toString((int) rate));
}
int bits = audioFormat.getSampleSizeInBits();
if (bits != AudioSystem.NOT_SPECIFIED) {
metadata.set("bits", String.valueOf(bits));
if (bits == 8) {
metadata.set(XMPDM.AUDIO_SAMPLE_TYPE, "8Int");
} else if (bits == 16) {
metadata.set(XMPDM.AUDIO_SAMPLE_TYPE, "16Int");
} else if (bits == 32) {
metadata.set(XMPDM.AUDIO_SAMPLE_TYPE, "32Int");
}
}
metadata.set("encoding", audioFormat.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
addMetadata(metadata, fileFormat.properties());
addMetadata(metadata, audioFormat.properties());
} 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.
}
XHTMLContentHandler xhtml = new XHTMLContentHandler(handler, metadata);
xhtml.startDocument();
xhtml.endDocument();
}
private void addMetadata(Metadata metadata, Map<String, Object> properties) {
if (properties != null) {
for (Entry<String, Object> entry : properties.entrySet()) {
Object value = entry.getValue();
if (value != null) {
metadata.set(entry.getKey(), value.toString());
}
}
}
}
}