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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.googlecode.mp4parser;
import com.coremedia.iso.BoxParser;
import com.coremedia.iso.IsoTypeReader;
import com.coremedia.iso.IsoTypeWriter;
import com.coremedia.iso.boxes.Box;
import com.coremedia.iso.boxes.FullBox;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.WritableByteChannel;
import java.util.List;
import java.util.logging.Logger;
/**
* Abstract base class for a full iso box only containing ither boxes.
*/
public abstract class FullContainerBox extends AbstractContainerBox implements FullBox {
private static Logger LOG = Logger.getLogger(FullContainerBox.class.getName());
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;
}
@SuppressWarnings("unchecked")
public List getBoxes(Class clazz) {
return getBoxes(clazz, false);
}
public FullContainerBox(String type) {
super(type);
}
@Override
public void parse(DataSource dataSource, ByteBuffer header, long contentSize, BoxParser boxParser) throws IOException {
ByteBuffer versionAndFlags = ByteBuffer.allocate(4);
dataSource.read(versionAndFlags);
parseVersionAndFlags((ByteBuffer) versionAndFlags.rewind());
super.parse(dataSource, header, contentSize, boxParser);
}
@Override
public void getBox(WritableByteChannel writableByteChannel) throws IOException {
super.getBox(writableByteChannel);
}
public String toString() {
return this.getClass().getSimpleName() + "[childBoxes]";
}
/**
* 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);
}
@Override
protected ByteBuffer getHeader() {
ByteBuffer header;
if (largeBox || getSize() >= (1L << 32)) {
header = ByteBuffer.wrap(new byte[]{0, 0, 0, 1, type.getBytes()[0], type.getBytes()[1], type.getBytes()[2], type.getBytes()[3], 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0});
header.position(8);
IsoTypeWriter.writeUInt64(header, getSize());
writeVersionAndFlags(header);
} else {
header = ByteBuffer.wrap(new byte[]{0, 0, 0, 0, type.getBytes()[0], type.getBytes()[1], type.getBytes()[2], type.getBytes()[3], 0, 0, 0, 0});
IsoTypeWriter.writeUInt32(header, getSize());
header.position(8);
writeVersionAndFlags(header);
}
header.rewind();
return header;
}
}