MovieExtendsHeaderBox.java

/*
 * Copyright 2009 castLabs GmbH, Berlin
 *
 * Licensed 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 com.coremedia.iso.boxes.fragment;

import com.coremedia.iso.BoxParser;
import com.coremedia.iso.IsoBufferWrapper;
import com.coremedia.iso.IsoFile;
import com.coremedia.iso.IsoOutputStream;
import com.coremedia.iso.boxes.AbstractFullBox;
import com.coremedia.iso.boxes.Box;

import java.io.IOException;

/**
 * aligned(8) class MovieExtendsHeaderBox extends FullBox('mehd', version, 0) {
 * if (version==1) {
 * unsigned int(64) fragment_duration;
 * } else { // version==0
 * unsigned int(32) fragment_duration;
 * }
 * }
 */
public class MovieExtendsHeaderBox extends AbstractFullBox {
    public static final String TYPE = "mehd";
    private long fragmentDuration;

    public MovieExtendsHeaderBox() {
        super(IsoFile.fourCCtoBytes(TYPE));
    }

    @Override
    protected long getContentSize() {
        return getVersion() == 1 ? 8 : 4;
    }

    protected void getContent(IsoOutputStream os) throws IOException {
        if (getVersion() == 1) {
            os.writeUInt64(fragmentDuration);
        } else {
            os.writeUInt32(fragmentDuration);
        }
    }

    @Override
    public void parse(IsoBufferWrapper in, long size, BoxParser boxParser, Box lastMovieFragmentBox) throws IOException {
        super.parse(in, size, boxParser, lastMovieFragmentBox);

        fragmentDuration = getVersion() == 1 ? in.readUInt64() : in.readUInt32();
    }

    public long getFragmentDuration() {
        return fragmentDuration;
    }
}