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 HintMediaHeaderBox()37 public HintMediaHeaderBox() { 38 super(TYPE); 39 } 40 getMaxPduSize()41 public int getMaxPduSize() { 42 return maxPduSize; 43 } 44 getAvgPduSize()45 public int getAvgPduSize() { 46 return avgPduSize; 47 } 48 getMaxBitrate()49 public long getMaxBitrate() { 50 return maxBitrate; 51 } 52 getAvgBitrate()53 public long getAvgBitrate() { 54 return avgBitrate; 55 } 56 getContentSize()57 protected long getContentSize() { 58 return 20; 59 } 60 61 @Override _parseDetails(ByteBuffer content)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 getContent(ByteBuffer byteBuffer)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 toString()83 public String toString() { 84 return "HintMediaHeaderBox{" + 85 "maxPduSize=" + maxPduSize + 86 ", avgPduSize=" + avgPduSize + 87 ", maxBitrate=" + maxBitrate + 88 ", avgBitrate=" + avgBitrate + 89 '}'; 90 } 91 } 92