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 17package com.coremedia.iso.boxes; 18 19import com.coremedia.iso.IsoFile; 20import com.coremedia.iso.IsoTypeReader; 21import com.coremedia.iso.IsoTypeWriter; 22import com.coremedia.iso.Utf8; 23import com.googlecode.mp4parser.AbstractFullBox; 24 25import java.nio.ByteBuffer; 26 27/** 28 * The Scheme Type Box identifies the protection scheme. Resides in a Protection Scheme Information Box or 29 * an SRTP Process Box. 30 * 31 * @see com.coremedia.iso.boxes.SchemeInformationBox 32 */ 33public class SchemeTypeBox extends AbstractFullBox { 34 public static final String TYPE = "schm"; 35 String schemeType = " "; 36 long schemeVersion; 37 String schemeUri = null; 38 39 public SchemeTypeBox() { 40 super(TYPE); 41 } 42 43 public String getSchemeType() { 44 return schemeType; 45 } 46 47 public long getSchemeVersion() { 48 return schemeVersion; 49 } 50 51 public String getSchemeUri() { 52 return schemeUri; 53 } 54 55 public void setSchemeType(String schemeType) { 56 assert schemeType != null && schemeType.length() == 4 : "SchemeType may not be null or not 4 bytes long"; 57 this.schemeType = schemeType; 58 } 59 60 public void setSchemeVersion(int schemeVersion) { 61 this.schemeVersion = schemeVersion; 62 } 63 64 public void setSchemeUri(String schemeUri) { 65 this.schemeUri = schemeUri; 66 } 67 68 protected long getContentSize() { 69 return 12 + (((getFlags() & 1) == 1) ? Utf8.utf8StringLengthInBytes(schemeUri) + 1 : 0); 70 } 71 72 @Override 73 public void _parseDetails(ByteBuffer content) { 74 parseVersionAndFlags(content); 75 schemeType = IsoTypeReader.read4cc(content); 76 schemeVersion = IsoTypeReader.readUInt32(content); 77 if ((getFlags() & 1) == 1) { 78 schemeUri = IsoTypeReader.readString(content); 79 } 80 } 81 82 @Override 83 protected void getContent(ByteBuffer byteBuffer) { 84 writeVersionAndFlags(byteBuffer); 85 byteBuffer.put(IsoFile.fourCCtoBytes(schemeType)); 86 IsoTypeWriter.writeUInt32(byteBuffer, schemeVersion); 87 if ((getFlags() & 1) == 1) { 88 byteBuffer.put(Utf8.convert(schemeUri)); 89 } 90 } 91 92 public String toString() { 93 StringBuilder buffer = new StringBuilder(); 94 buffer.append("Schema Type Box["); 95 buffer.append("schemeUri=").append(schemeUri).append("; "); 96 buffer.append("schemeType=").append(schemeType).append("; "); 97 buffer.append("schemeVersion=").append(schemeUri).append("; "); 98 buffer.append("]"); 99 return buffer.toString(); 100 } 101} 102