| /* |
| * Copyright 2012 castLabs, Berlin |
| * |
| * Licensed under the Apache License, Version 2.0 (the License); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an AS IS BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.googlecode.mp4parser.boxes.mp4.samplegrouping; |
| |
| import com.coremedia.iso.Hex; |
| import com.coremedia.iso.IsoTypeReader; |
| import com.coremedia.iso.IsoTypeWriter; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Arrays; |
| |
| /** |
| * Each sample in a protected track shall be associated with an IsEncrypted flag, IV_Size, and KID. |
| * This can be accomplished by (a) relying on the default values in the TrackEncryptionBox |
| * (see 8.2), or (b) specifying the parameters by sample group, or (c) using a combination of these two techniques. |
| * <p/> |
| * When specifying the parameters by sample group, the SampleToGroupBox in the sample table or track |
| * fragment specifies which samples use which sample group description from the SampleGroupDescriptionBox. |
| */ |
| public class CencSampleEncryptionInformationGroupEntry extends GroupEntry { |
| public static final String TYPE = "seig"; |
| |
| private int isEncrypted; |
| private byte ivSize; |
| private byte[] kid = new byte[16]; |
| |
| @Override |
| public void parse(ByteBuffer byteBuffer) { |
| isEncrypted = IsoTypeReader.readUInt24(byteBuffer); |
| ivSize = (byte) IsoTypeReader.readUInt8(byteBuffer); |
| kid = new byte[16]; |
| byteBuffer.get(kid); |
| |
| } |
| |
| @Override |
| public ByteBuffer get() { |
| ByteBuffer byteBuffer = ByteBuffer.allocate(20); |
| IsoTypeWriter.writeUInt24(byteBuffer, isEncrypted); |
| IsoTypeWriter.writeUInt8(byteBuffer, ivSize); |
| byteBuffer.put(kid); |
| byteBuffer.rewind(); |
| return byteBuffer; |
| } |
| |
| public int getEncrypted() { |
| return isEncrypted; |
| } |
| |
| public void setEncrypted(int encrypted) { |
| isEncrypted = encrypted; |
| } |
| |
| public byte getIvSize() { |
| return ivSize; |
| } |
| |
| public void setIvSize(byte ivSize) { |
| this.ivSize = ivSize; |
| } |
| |
| public byte[] getKid() { |
| return kid; |
| } |
| |
| public void setKid(byte[] kid) { |
| assert kid.length == 16; |
| this.kid = kid; |
| } |
| |
| @Override |
| public String toString() { |
| return "CencSampleEncryptionInformationGroupEntry{" + |
| "isEncrypted=" + isEncrypted + |
| ", ivSize=" + ivSize + |
| ", kid=" + Hex.encodeHex(kid) + |
| '}'; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| |
| CencSampleEncryptionInformationGroupEntry that = (CencSampleEncryptionInformationGroupEntry) o; |
| |
| if (isEncrypted != that.isEncrypted) { |
| return false; |
| } |
| if (ivSize != that.ivSize) { |
| return false; |
| } |
| if (!Arrays.equals(kid, that.kid)) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| @Override |
| public int hashCode() { |
| int result = isEncrypted; |
| result = 31 * result + (int) ivSize; |
| result = 31 * result + (kid != null ? Arrays.hashCode(kid) : 0); |
| return result; |
| } |
| } |