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      1 /*
      2  * Copyright 2008 CoreMedia AG, Hamburg
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the License);
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *     http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an AS IS BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.coremedia.iso.boxes;
     18 
     19 import com.coremedia.iso.IsoTypeReader;
     20 import com.coremedia.iso.IsoTypeWriter;
     21 
     22 import java.nio.ByteBuffer;
     23 
     24 /**
     25  * The hint media header contains general information, independent of the protocaol, for hint tracks. Resides
     26  * in Media Information Box.
     27  *
     28  * @see com.coremedia.iso.boxes.MediaInformationBox
     29  */
     30 public class HintMediaHeaderBox extends AbstractMediaHeaderBox {
     31     private int maxPduSize;
     32     private int avgPduSize;
     33     private long maxBitrate;
     34     private long avgBitrate;
     35     public static final String TYPE = "hmhd";
     36 
     37     public HintMediaHeaderBox() {
     38         super(TYPE);
     39     }
     40 
     41     public int getMaxPduSize() {
     42         return maxPduSize;
     43     }
     44 
     45     public int getAvgPduSize() {
     46         return avgPduSize;
     47     }
     48 
     49     public long getMaxBitrate() {
     50         return maxBitrate;
     51     }
     52 
     53     public long getAvgBitrate() {
     54         return avgBitrate;
     55     }
     56 
     57     protected long getContentSize() {
     58         return 20;
     59     }
     60 
     61     @Override
     62     public void _parseDetails(ByteBuffer content) {
     63         parseVersionAndFlags(content);
     64         maxPduSize = IsoTypeReader.readUInt16(content);
     65         avgPduSize = IsoTypeReader.readUInt16(content);
     66         maxBitrate = IsoTypeReader.readUInt32(content);
     67         avgBitrate = IsoTypeReader.readUInt32(content);
     68         IsoTypeReader.readUInt32(content);    // reserved!
     69 
     70     }
     71 
     72     @Override
     73     protected void getContent(ByteBuffer byteBuffer) {
     74         writeVersionAndFlags(byteBuffer);
     75         IsoTypeWriter.writeUInt16(byteBuffer, maxPduSize);
     76         IsoTypeWriter.writeUInt16(byteBuffer, avgPduSize);
     77         IsoTypeWriter.writeUInt32(byteBuffer, maxBitrate);
     78         IsoTypeWriter.writeUInt32(byteBuffer, avgBitrate);
     79         IsoTypeWriter.writeUInt32(byteBuffer, 0);
     80     }
     81 
     82     @Override
     83     public String toString() {
     84         return "HintMediaHeaderBox{" +
     85                 "maxPduSize=" + maxPduSize +
     86                 ", avgPduSize=" + avgPduSize +
     87                 ", maxBitrate=" + maxBitrate +
     88                 ", avgBitrate=" + avgBitrate +
     89                 '}';
     90     }
     91 }
     92