com.drew.metadata.mov.metadata.QuickTimeDirectoryHandler Maven / Gradle / Ivy
/*
* Copyright 2002-2017 Drew Noakes
*
* 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.
*
* More information about this project is available at:
*
* https://drewnoakes.com/code/exif/
* https://github.com/drewnoakes/metadata-extractor
*/
package com.drew.metadata.mov.metadata;
import com.drew.imaging.quicktime.QuickTimeHandler;
import com.drew.lang.SequentialByteArrayReader;
import com.drew.lang.annotations.NotNull;
import com.drew.lang.annotations.Nullable;
import com.drew.metadata.Metadata;
import com.drew.metadata.mov.QuickTimeAtomTypes;
import com.drew.metadata.mov.QuickTimeContainerTypes;
import com.drew.metadata.mov.QuickTimeMetadataHandler;
import com.drew.metadata.mov.atoms.Atom;
import java.io.IOException;
/**
* @author Payton Garland
*/
public class QuickTimeDirectoryHandler extends QuickTimeMetadataHandler
{
private String currentData;
public QuickTimeDirectoryHandler(Metadata metadata)
{
super(metadata);
}
@Override
protected boolean shouldAcceptAtom(@NotNull Atom atom)
{
return atom.type.equals(QuickTimeAtomTypes.ATOM_DATA);
}
@Override
protected boolean shouldAcceptContainer(@NotNull Atom atom)
{
return QuickTimeMetadataDirectory._tagIntegerMap.containsKey(atom.type)
|| atom.type.equals(QuickTimeContainerTypes.ATOM_METADATA_LIST);
}
@Override
protected QuickTimeHandler processAtom(@NotNull Atom atom, @Nullable byte[] payload) throws IOException
{
if (payload != null) {
SequentialByteArrayReader reader = new SequentialByteArrayReader(payload);
if (atom.type.equals(QuickTimeAtomTypes.ATOM_DATA) && currentData != null) {
processData(payload, reader);
} else {
currentData = new String(reader.getBytes(4));
}
} else {
if (QuickTimeMetadataDirectory._tagIntegerMap.containsKey(atom.type)) {
currentData = atom.type;
} else {
currentData = null;
}
}
return this;
}
@Override
protected void processData(@NotNull byte[] payload, @NotNull SequentialByteArrayReader reader) throws IOException
{
// 4 bytes: type indicator
// 4 bytes: locale indicator
reader.skip(8);
String value = new String(reader.getBytes(payload.length - 8));
directory.setString(QuickTimeMetadataDirectory._tagIntegerMap.get(currentData), value);
}
@Override
protected void processKeys(@NotNull SequentialByteArrayReader reader) throws IOException
{
// Do nothing
}
}