com.drew.imaging.heif.HeifReader Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of metadata-extractor Show documentation

Java library for extracting EXIF, IPTC, XMP, ICC and other metadata from image and video files.

There is a newer version: 2.19.0

/*
 * Copyright 2002-2019 Drew Noakes and contributors
 *
 *    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.imaging.heif;

import com.drew.lang.StreamReader;
import com.drew.metadata.heif.boxes.Box;

import java.io.IOException;
import java.io.InputStream;

public class HeifReader
{
    public void extract(InputStream inputStream, HeifHandler handler)
    {
        StreamReader reader = new StreamReader(inputStream);
        reader.setMotorolaByteOrder(true);

        processBoxes(reader, -1, handler);
    }

    private void processBoxes(StreamReader reader, long atomEnd, HeifHandler handler)
    {
        try {
            while (atomEnd == -1 || reader.getPosition() < atomEnd) {

                Box box = new Box(reader);

                // Determine if fourCC is container/atom and process accordingly
                // Unknown atoms will be skipped

                if (handler.shouldAcceptContainer(box)) {
                    handler.processContainer(box, reader);
                    processBoxes(reader, box.size + reader.getPosition() - 8, handler);
                } else if (handler.shouldAcceptBox(box)) {
                    handler = handler.processBox(box, reader.getBytes((int)box.size - 8));
                } else if (box.size > 1) {
                    reader.skip(box.size - 8);
                } else if (box.size == -1) {
                    break;
                }
            }
        } catch (IOException e) {
            // Currently, reader relies on IOException to end
        }
    }
}