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.AbstractFullBox; 22 23 import java.nio.ByteBuffer; 24 25 /** 26 * Describes the format of media access units in PDCF files. 27 */ 28 public final class OmaDrmAccessUnitFormatBox extends AbstractFullBox { 29 public static final String TYPE = "odaf"; 30 31 private boolean selectiveEncryption; 32 private byte allBits; 33 34 private int keyIndicatorLength; 35 private int initVectorLength; 36 getContentSize()37 protected long getContentSize() { 38 return 7; 39 } 40 OmaDrmAccessUnitFormatBox()41 public OmaDrmAccessUnitFormatBox() { 42 super("odaf"); 43 } 44 isSelectiveEncryption()45 public boolean isSelectiveEncryption() { 46 return selectiveEncryption; 47 } 48 getKeyIndicatorLength()49 public int getKeyIndicatorLength() { 50 return keyIndicatorLength; 51 } 52 getInitVectorLength()53 public int getInitVectorLength() { 54 return initVectorLength; 55 } 56 setInitVectorLength(int initVectorLength)57 public void setInitVectorLength(int initVectorLength) { 58 this.initVectorLength = initVectorLength; 59 } 60 setKeyIndicatorLength(int keyIndicatorLength)61 public void setKeyIndicatorLength(int keyIndicatorLength) { 62 this.keyIndicatorLength = keyIndicatorLength; 63 } 64 setAllBits(byte allBits)65 public void setAllBits(byte allBits) { 66 this.allBits = allBits; 67 selectiveEncryption = (allBits & 0x80) == 0x80; 68 } 69 70 @Override _parseDetails(ByteBuffer content)71 public void _parseDetails(ByteBuffer content) { 72 parseVersionAndFlags(content); 73 allBits = (byte) IsoTypeReader.readUInt8(content); 74 selectiveEncryption = (allBits & 0x80) == 0x80; 75 keyIndicatorLength = IsoTypeReader.readUInt8(content); 76 initVectorLength = IsoTypeReader.readUInt8(content); 77 } 78 79 @Override getContent(ByteBuffer byteBuffer)80 protected void getContent(ByteBuffer byteBuffer) { 81 writeVersionAndFlags(byteBuffer); 82 IsoTypeWriter.writeUInt8(byteBuffer, allBits); 83 IsoTypeWriter.writeUInt8(byteBuffer, keyIndicatorLength); 84 IsoTypeWriter.writeUInt8(byteBuffer, initVectorLength); 85 } 86 87 } 88