/*
* Entagged Audio Tag library
* Copyright (c) 2003-2005 Rapha�l Slinckx <raphael@slinckx.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package entagged.audioformats.mp4.util;
import java.io.File;
import java.io.IOException;
import java.io.RandomAccessFile;
import entagged.audioformats.EncodingInfo;
import entagged.audioformats.exceptions.CannotReadException;
public class Mp4InfoReader {
public EncodingInfo read( RandomAccessFile raf ) throws CannotReadException, IOException {
EncodingInfo info = new EncodingInfo();
Mp4Box box = new Mp4Box();
//Get to the facts
//1-Searching for "moov"
seek(raf, box, "moov");
//2-Searching for "udta"
seek(raf, box, "mvhd");
byte[] b = new byte[box.getOffset()-8];
raf.read(b);
Mp4MvhdBox mvhd = new Mp4MvhdBox(b);
info.setLength(mvhd.getLength());
System.out.println(info);
return info;
}
private void seek(RandomAccessFile raf, Mp4Box box, String id) throws IOException {
byte[] b = new byte[8];
raf.read(b);
box.update(b);
while(!box.getId().equals(id)) {
raf.skipBytes(box.getOffset()-8);
raf.read(b);
box.update(b);
}
}
public static void main(String[] args) throws Exception {
new Mp4InfoReader().read(new RandomAccessFile(new File("/home/kikidonk/test.mp4"), "r"));
}
}