/*
* 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.mp3;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Set;
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.ParseContext;
import org.apache.tika.parser.Parser;
import org.apache.tika.sax.XHTMLContentHandler;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
/**
* The <code>Mp3Parser</code> is used to parse ID3 Version 1 Tag information
* from an MP3 file, if available.
*
* @see <a href="http://www.id3.org/ID3v1">MP3 ID3 Version 1 specification</a>
* @see <a href="http://www.id3.org/id3v2.4.0-structure">MP3 ID3 Version 2.4 Structure Specification</a>
* @see <a href="http://www.id3.org/id3v2.4.0-frames">MP3 ID3 Version 2.4 Frames Specification</a>
*/
public class Mp3Parser implements Parser {
private static final Set<MediaType> SUPPORTED_TYPES =
Collections.singleton(MediaType.audio("mpeg"));
public Set<MediaType> getSupportedTypes(ParseContext context) {
return SUPPORTED_TYPES;
}
public void parse(
InputStream stream, ContentHandler handler,
Metadata metadata, ParseContext context)
throws IOException, SAXException, TikaException {
metadata.set(Metadata.CONTENT_TYPE, "audio/mpeg");
XHTMLContentHandler xhtml = new XHTMLContentHandler(handler, metadata);
xhtml.startDocument();
// Create handlers for the various kinds of ID3 tags
ID3TagsAndAudio audioAndTags = getAllTagHandlers(stream, handler);
if (audioAndTags.tags.length > 0) {
CompositeTagHandler tag = new CompositeTagHandler(audioAndTags.tags);
metadata.set(Metadata.TITLE, tag.getTitle());
metadata.set(Metadata.AUTHOR, tag.getArtist());
metadata.set(XMPDM.ARTIST, tag.getArtist());
metadata.set(XMPDM.ALBUM, tag.getAlbum());
metadata.set(XMPDM.RELEASE_DATE, tag.getYear());
metadata.set(XMPDM.GENRE, tag.getGenre());
metadata.set(XMPDM.LOG_COMMENT, tag.getComment());
xhtml.element("h1", tag.getTitle());
xhtml.element("p", tag.getArtist());
// ID3v1.1 Track addition
if (tag.getTrackNumber() != null) {
xhtml.element("p", tag.getAlbum() + ", track " + tag.getTrackNumber());
metadata.set(XMPDM.TRACK_NUMBER, tag.getTrackNumber());
} else {
xhtml.element("p", tag.getAlbum());
}
xhtml.element("p", tag.getYear());
xhtml.element("p", tag.getComment());
xhtml.element("p", tag.getGenre());
}
if (audioAndTags.audio != null) {
metadata.set("samplerate", String.valueOf(audioAndTags.audio.getSampleRate()));
metadata.set("channels", String.valueOf(audioAndTags.audio.getChannels()));
metadata.set("version", audioAndTags.audio.getVersion());
metadata.set(
XMPDM.AUDIO_SAMPLE_RATE,
Integer.toString(audioAndTags.audio.getSampleRate()));
}
xhtml.endDocument();
}
/**
* @deprecated This method will be removed in Apache Tika 1.0.
*/
public void parse(
InputStream stream, ContentHandler handler, Metadata metadata)
throws IOException, SAXException, TikaException {
parse(stream, handler, metadata, new ParseContext());
}
/**
* Scans the MP3 frames for ID3 tags, and creates ID3Tag Handlers
* for each supported set of tags.
*/
protected static ID3TagsAndAudio getAllTagHandlers(InputStream stream, ContentHandler handler)
throws IOException, SAXException, TikaException {
ID3v24Handler v24 = null;
ID3v23Handler v23 = null;
ID3v22Handler v22 = null;
ID3v1Handler v1 = null;
AudioFrame firstAudio = null;
// ID3v2 tags live at the start of the file
// You can apparently have several different ID3 tag blocks
// So, keep going until we don't find any more
MP3Frame f;
while ((f = ID3v2Frame.createFrameIfPresent(stream)) != null && firstAudio == null) {
if(f instanceof ID3v2Frame) {
ID3v2Frame id3F = (ID3v2Frame)f;
if (id3F.getMajorVersion() == 4) {
v24 = new ID3v24Handler(id3F);
} else if(id3F.getMajorVersion() == 3) {
v23 = new ID3v23Handler(id3F);
} else if(id3F.getMajorVersion() == 2) {
v22 = new ID3v22Handler(id3F);
}
} else if(f instanceof AudioFrame) {
firstAudio = (AudioFrame)f;
}
}
// ID3v1 tags live at the end of the file
// Our handler handily seeks to the end for us
v1 = new ID3v1Handler(stream, handler);
// Go in order of preference
// Currently, that's newest to oldest
List<ID3Tags> tags = new ArrayList<ID3Tags>();
if(v24 != null && v24.getTagsPresent()) {
tags.add(v24);
}
if(v23 != null && v23.getTagsPresent()) {
tags.add(v23);
}
if(v22 != null && v22.getTagsPresent()) {
tags.add(v22);
}
if(v1 != null && v1.getTagsPresent()) {
tags.add(v1);
}
ID3TagsAndAudio ret = new ID3TagsAndAudio();
ret.audio = firstAudio;
ret.tags = tags.toArray(new ID3Tags[tags.size()]);
return ret;
}
protected static class ID3TagsAndAudio {
private ID3Tags[] tags;
private AudioFrame audio;
}
}