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 import com.googlecode.mp4parser.AbstractBox; 22 23 import java.nio.ByteBuffer; 24 25 /** 26 * <code>class BitRateBox extends Box('btrt') {<br/> 27 * unsigned int(32) bufferSizeDB;<br/> 28 * // gives the size of the decoding buffer for<br/> 29 * // the elementary stream in bytes.<br/> 30 * unsigned int(32) maxBitrate;<br/> 31 * // gives the maximum rate in bits/second <br/> 32 * // over any window of one second.<br/> 33 * unsigned int(32) avgBitrate;<br/> 34 * // avgBitrate gives the average rate in <br/> 35 * // bits/second over the entire presentation.<br/> 36 * }</code> 37 */ 38 39 public final class BitRateBox extends AbstractBox { 40 public static final String TYPE = "btrt"; 41 42 private long bufferSizeDb; 43 private long maxBitrate; 44 private long avgBitrate; 45 46 public BitRateBox() { 47 super(TYPE); 48 } 49 50 protected long getContentSize() { 51 return 12; 52 } 53 54 @Override 55 public void _parseDetails(ByteBuffer content) { 56 bufferSizeDb = IsoTypeReader.readUInt32(content); 57 maxBitrate = IsoTypeReader.readUInt32(content); 58 avgBitrate = IsoTypeReader.readUInt32(content); 59 } 60 61 @Override 62 protected void getContent(ByteBuffer byteBuffer) { 63 IsoTypeWriter.writeUInt32(byteBuffer, bufferSizeDb); 64 IsoTypeWriter.writeUInt32(byteBuffer, maxBitrate); 65 IsoTypeWriter.writeUInt32(byteBuffer, avgBitrate); 66 } 67 68 public long getBufferSizeDb() { 69 return bufferSizeDb; 70 } 71 72 public void setBufferSizeDb(long bufferSizeDb) { 73 this.bufferSizeDb = bufferSizeDb; 74 } 75 76 public long getMaxBitrate() { 77 return maxBitrate; 78 } 79 80 public void setMaxBitrate(long maxBitrate) { 81 this.maxBitrate = maxBitrate; 82 } 83 84 public long getAvgBitrate() { 85 return avgBitrate; 86 } 87 88 public void setAvgBitrate(long avgBitrate) { 89 this.avgBitrate = avgBitrate; 90 } 91 } 92
