org.opencastproject.videosegmenter.impl.jmf.ImageUtils.java Source code

Introduction

Here is the source code for org.opencastproject.videosegmenter.impl.jmf.ImageUtils.java

Source

/**
 *  Copyright 2009, 2010 The Regents of the University of California
 *  Licensed under the Educational Community 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.osedu.org/licenses/ECL-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 org.opencastproject.videosegmenter.impl.jmf;

import org.apache.commons.io.FileUtils;

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;

import javax.imageio.ImageIO;
import javax.imageio.stream.MemoryCacheImageInputStream;
import javax.media.Buffer;

/**
 * A collection of utility methods used to deal with frame buffers and images.
 */
public final class ImageUtils {

    /** Disallow construction of this utility class */
    private ImageUtils() {
    }

    /**
     * Convers the frame buffer to a <code>BufferedImage</code>. This method returns <code>null</code> if the buffer
     * couldn't be created
     * 
     * @param buf
     *          the buffer
     * @return a <code>BufferedImage</code>
     */
    public static BufferedImage createImage(Buffer buf) throws IOException {
        InputStream is = new ByteArrayInputStream((byte[]) buf.getData());
        BufferedImage bufferedImage = ImageIO.read(new MemoryCacheImageInputStream(is));
        return bufferedImage;
    }

    /**
     * Writes the image to disk.
     * 
     * @param image
     *          the image
     */
    public static void saveImage(BufferedImage image, File file) throws IOException {
        file.getParentFile().mkdirs();
        FileUtils.deleteQuietly(file);
        ImageIO.write(image, "jpg", file);
    }

}