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A generic parser and writer for all ISO 14496 based files (MP4, Quicktime, DCF, PDCF, ...)
/*
* 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.BoxParser;
import com.coremedia.iso.IsoTypeReader;
import com.coremedia.iso.IsoTypeWriter;
import com.googlecode.mp4parser.AbstractContainerBox;
import java.io.IOException;
import java.nio.ByteBuffer;
import com.googlecode.mp4parser.DataSource;
import java.nio.channels.WritableByteChannel;
/**
* 4cc = "{@value #TYPE}"
* A common base structure to contain general metadata. See ISO/IEC 14496-12 Ch. 8.44.1.
*/
public class MetaBox extends AbstractContainerBox {
public static final String TYPE = "meta";
private int version;
private int flags;
public int getVersion() {
return version;
}
public void setVersion(int version) {
this.version = version;
}
public int getFlags() {
return flags;
}
public void setFlags(int flags) {
this.flags = flags;
}
/**
* Parses the version/flags header and returns the remaining box size.
*
* @param content the ByteBuffer
that contains the version & flag
* @return number of bytes read
*/
protected final long parseVersionAndFlags(ByteBuffer content) {
version = IsoTypeReader.readUInt8(content);
flags = IsoTypeReader.readUInt24(content);
return 4;
}
protected final void writeVersionAndFlags(ByteBuffer bb) {
IsoTypeWriter.writeUInt8(bb, version);
IsoTypeWriter.writeUInt24(bb, flags);
}
public MetaBox() {
super(TYPE);
}
@Override
public void parse(DataSource dataSource, ByteBuffer header, long contentSize, BoxParser boxParser) throws IOException {
ByteBuffer bb = ByteBuffer.allocate(4);
dataSource.read(bb);
parseVersionAndFlags((ByteBuffer) bb.rewind());
initContainer(dataSource, contentSize - 4, boxParser);
}
@Override
public void getBox(WritableByteChannel writableByteChannel) throws IOException {
writableByteChannel.write(getHeader());
ByteBuffer bb = ByteBuffer.allocate(4);
writeVersionAndFlags(bb);
writableByteChannel.write((ByteBuffer) bb.rewind());
writeContainer(writableByteChannel);
}
@Override
public long getSize() {
long s = getContainerSize();
long t = 4; // bytes to container start
return s + t + ((largeBox || (s + t) >= (1L << 32)) ? 16 : 8);
}
}