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package com.googlecode.mp4parser.boxes.cenc;
import com.coremedia.iso.BoxParser;
import com.coremedia.iso.IsoFile;
import com.coremedia.iso.IsoTypeReader;
import com.coremedia.iso.IsoTypeWriter;
import com.coremedia.iso.boxes.Box;
import com.googlecode.mp4parser.AbstractFullBox;
import com.googlecode.mp4parser.util.UUIDConverter;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.UUID;
/**
* This box contains information needed by a Content Protection System to play back the content. The
* data format is specified by the system identified by the ‘pssh’ parameter SystemID, and is considered
* opaque for the purposes of this specification.
* <p/>
* The data encapsulated in the Data field may be read by the identified Content Protection System to
* enable decryption key acquisition and decryption of media data. For license/rights-based systems, the
* header information may include data such as the URL of license server(s) or rights issuer(s) used,
* embedded licenses/rights, and/or other protection system specific metadata.
* <p/>
* A single file may be constructed to be playable by multiple key and digital rights management (DRM)
* systems, by including one Protection System-Specific Header box for each system supported. Readers
* that process such presentations must match the SystemID field in this box to the SystemID(s) of the
* DRM System(s) they support, and select or create the matching Protection System-Specific Header
* box(es) for storage and retrieval of Protection-Specific information interpreted or created by that DRM
* system.
*/
public class ProtectionSystemSpecificHeaderBox extends AbstractFullBox {
public static final String TYPE = "pssh";
public static byte[] OMA2_SYSTEM_ID = UUIDConverter.convert(UUID.fromString("A2B55680-6F43-11E0-9A3F-0002A5D5C51B"));
public static byte[] PLAYREADY_SYSTEM_ID = UUIDConverter.convert(UUID.fromString("9A04F079-9840-4286-AB92-E65BE0885F95"));
byte[] content;
byte[] systemId;
public byte[] getSystemId() {
return systemId;
}
public void setSystemId(byte[] systemId) {
assert systemId.length == 16;
this.systemId = systemId;
}
public byte[] getContent() {
return content;
}
public void setContent(byte[] content) {
this.content = content;
}
public ProtectionSystemSpecificHeaderBox() {
super(TYPE);
}
@Override
protected long getContentSize() {
return 24 + content.length;
}
@Override
protected void getContent(ByteBuffer byteBuffer) {
writeVersionAndFlags(byteBuffer);
assert systemId.length == 16;
byteBuffer.put(systemId, 0, 16);
IsoTypeWriter.writeUInt32(byteBuffer, content.length);
byteBuffer.put(content);
}
@Override
protected void _parseDetails(ByteBuffer content) {
parseVersionAndFlags(content);
systemId = new byte[16];
content.get(systemId);
long length = IsoTypeReader.readUInt32(content);
this.content = new byte[content.remaining()];
content.get(this.content);
assert length == this.content.length;
}
}
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