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/*
* Copyright 2008 CoreMedia AG, Hamburg
*
* 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.coremedia.iso.boxes;
import com.coremedia.iso.IsoTypeReader;
import com.coremedia.iso.IsoTypeWriter;
import com.googlecode.mp4parser.AbstractContainerBox;
import com.googlecode.mp4parser.util.ByteBufferByteChannel;
import java.io.IOException;
import java.nio.ByteBuffer;
/**
* A common base structure to contain general metadata. See ISO/IEC 14496-12 Ch. 8.44.1.
*/
public class MetaBox extends AbstractContainerBox {
private int version = 0;
private int flags = 0;
public static final String TYPE = "meta";
public MetaBox() {
super(TYPE);
}
@Override
public long getContentSize() {
if (isMp4Box()) {
// it's a fullbox
return 4 + super.getContentSize();
} else {
// it's an apple metabox
return super.getContentSize();
}
}
@Override
public long getNumOfBytesToFirstChild() {
if (isMp4Box()) {
// it's a fullbox
return 12;
} else {
// it's an apple metabox
return 8;
}
}
@Override
public void _parseDetails(ByteBuffer content) {
int pos = content.position();
content.get(new byte[4]);
String isHdlr = IsoTypeReader.read4cc(content);
if ("hdlr".equals(isHdlr)) {
// this is apple bullshit - it's NO FULLBOX
content.position(pos);
version = -1;
flags = -1;
} else {
content.position(pos);
version = IsoTypeReader.readUInt8(content);
flags = IsoTypeReader.readUInt24(content);
}
while (content.remaining() >= 8) {
try {
boxes.add(boxParser.parseBox(new ByteBufferByteChannel(content), this));
} catch (IOException e) {
throw new RuntimeException("Sebastian needs to fix 7518765283");
}
}
if (content.remaining() > 0) {
throw new RuntimeException("Sebastian needs to fix it 90732r26537");
}
}
@Override
protected void getContent(ByteBuffer byteBuffer) {
if (isMp4Box()) {
IsoTypeWriter.writeUInt8(byteBuffer, version);
IsoTypeWriter.writeUInt24(byteBuffer, flags);
}
writeChildBoxes(byteBuffer);
}
public boolean isMp4Box() {
return version != -1 && flags != -1;
}
public void setMp4Box(boolean mp4) {
if (mp4) {
version = 0;
flags = 0;
} else {
version = -1;
flags = -1;
}
}
}
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