MaximumDataRateBox.java

package com.coremedia.iso.boxes.rtp;

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.AbstractBox;
import com.coremedia.iso.boxes.Box;

import java.io.IOException;

/**
 * The maximum data rate. This atom contains two numbers:<br/>
 * <p/>
 * g, followed by m (both 32-bit values).
 * <ul>
 * <li>g is the granularity, in milliseconds.</li>
 * <li>m is the maximum data rate given that granularity.</li>
 * </ul>
 * <br/>
 * For example, if g is 1 second, then m is the maximum data rate over any
 * 1 second. There may be multiple 'maxr' atoms, with different values for
 * g. The maximum data rate calculation does not include any network headers
 * (but does include 12-byte RTP headers).
 */
public class MaximumDataRateBox extends AbstractBox {
    public static final String TYPE = "maxr";

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

    private long g, m;

    public long getG() {
        return g;
    }

    public void setG(long g) {
        this.g = g;
    }

    public long getM() {
        return m;
    }

    public void setM(long m) {
        this.m = m;
    }

    protected long getContentSize() {
        return 8;
    }

    public void parse(IsoBufferWrapper in, long size, BoxParser boxParser, Box lastMovieFragmentBox) throws IOException {
        g = in.readUInt32();
        m = in.readUInt32();
    }

    protected void getContent(IsoOutputStream os) throws IOException {
        os.writeUInt32(g);
        os.writeUInt32(m);
    }
}