com.drew.metadata.mp4.Mp4MediaHandler 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.mp4;
import com.drew.imaging.mp4.Mp4Handler;
import com.drew.lang.SequentialByteArrayReader;
import com.drew.lang.SequentialReader;
import com.drew.lang.annotations.NotNull;
import com.drew.lang.annotations.Nullable;
import com.drew.metadata.Metadata;
import com.drew.metadata.mp4.boxes.Box;
import com.drew.metadata.mp4.media.Mp4MediaDirectory;
import java.io.IOException;
import java.util.Calendar;
import java.util.Date;
public abstract class Mp4MediaHandler extends Mp4Handler
{
public Mp4MediaHandler(Metadata metadata)
{
super(metadata);
if (Mp4HandlerFactory.HANDLER_PARAM_CREATION_TIME != null && Mp4HandlerFactory.HANDLER_PARAM_MODIFICATION_TIME != null) {
// Get creation/modification times
Calendar calendar = Calendar.getInstance();
calendar.set(1904, 0, 1, 0, 0, 0); // January 1, 1904 - Macintosh Time Epoch
Date date = calendar.getTime();
long macToUnixEpochOffset = date.getTime();
String creationTimeStamp = new Date(Mp4HandlerFactory.HANDLER_PARAM_CREATION_TIME * 1000 + macToUnixEpochOffset).toString();
String modificationTimeStamp = new Date(Mp4HandlerFactory.HANDLER_PARAM_MODIFICATION_TIME * 1000 + macToUnixEpochOffset).toString();
String language = Mp4HandlerFactory.HANDLER_PARAM_LANGUAGE;
directory.setString(Mp4MediaDirectory.TAG_CREATION_TIME, creationTimeStamp);
directory.setString(Mp4MediaDirectory.TAG_MODIFICATION_TIME, modificationTimeStamp);
directory.setString(Mp4MediaDirectory.TAG_LANGUAGE_CODE, language);
}
}
@Override
public boolean shouldAcceptBox(@NotNull Box box)
{
return box.type.equals(getMediaInformation())
|| box.type.equals(Mp4BoxTypes.BOX_SAMPLE_DESCRIPTION)
|| box.type.equals(Mp4BoxTypes.BOX_TIME_TO_SAMPLE);
}
@Override
public boolean shouldAcceptContainer(@NotNull Box box)
{
return box.type.equals(Mp4ContainerTypes.BOX_SAMPLE_TABLE)
|| box.type.equals(Mp4ContainerTypes.BOX_MEDIA_INFORMATION);
}
@Override
public Mp4Handler processBox(@NotNull Box box, @Nullable byte[] payload) throws IOException
{
if (payload != null) {
SequentialReader reader = new SequentialByteArrayReader(payload);
if (box.type.equals(getMediaInformation())) {
processMediaInformation(reader, box);
} else if (box.type.equals(Mp4BoxTypes.BOX_SAMPLE_DESCRIPTION)) {
processSampleDescription(reader, box);
} else if (box.type.equals(Mp4BoxTypes.BOX_TIME_TO_SAMPLE)) {
processTimeToSample(reader, box);
}
}
return this;
}
protected abstract String getMediaInformation();
protected abstract void processSampleDescription(@NotNull SequentialReader reader, @NotNull Box box) throws IOException;
protected abstract void processMediaInformation(@NotNull SequentialReader reader, @NotNull Box box) throws IOException;
protected abstract void processTimeToSample(@NotNull SequentialReader reader, @NotNull Box box) throws IOException;
}