mediaframe.java

来自「基于MPEG 7 标准,符合未来语义网架构,很值得参考」· Java 代码 · 共 176 行

/*
 * This file is part of Caliph & Emir.
 *
 * Caliph & Emir is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Caliph & Emir is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Caliph & Emir; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Copyright statement:
 * --------------------
 * (c) 2002-2005 by VizIR project.
 * Please contact Horst Eidenberger ([e-mail])
 * for more information.
 *
 * Mathias Lux, [e-mail], http://www.juggle.at
 */
package org.vizir.media;

import java.awt.image.BufferedImage;

/**
 * This class is represents one Frame of a MediaContent
 *
 * @author Markus Raab
 * @version $Id: MediaFrame.java,v 1.2 2005/05/17 22:00:47 motte Exp $
 */


public class MediaFrame {

    private int[] dataRGB = null;
    private int width = 0;
    private int height = 0;

    /**
     * Create a MediaFrame object of a BufferedImage.
     *
     * @param image
     */
    public MediaFrame(BufferedImage image) {
        width = image.getWidth();
        height = image.getHeight();
        dataRGB = image.getRGB(0, 0, width, height, null, 0, width);
    }

    /**
     * Constructor with the image-data as byte array.
     *
     * @param buffer byte array of MediaFrame-data
     * @param width  with of the MediaFrame
     * @param height height of the MediaFrame
     */
    public MediaFrame(byte[] buffer, int width, int height) {

        this.width = width;
        this.height = height;
        int length = buffer.length;
        for (int i = 0; i < length; i++)
            this.dataRGB[i] = (int) buffer[i];
    }

    /**
     * Constructor with the image-data as short array.
     *
     * @param buffer array of MediaFrame-data
     * @param width  with of the MediaFrame
     * @param height height of the MediaFrame
     */
    public MediaFrame(short[] buffer, int width, int height) {
        this.width = width;
        this.height = height;
        int length = buffer.length;
        for (int i = 0; i < length; i++)
            this.dataRGB[i] = (int) buffer[i];
    }

    /**
     * Constructor with the image-data as int array.
     *
     * @param buffer array of MediaFrame-data
     * @param width  with of the MediaFrame
     * @param height height of the MediaFrame
     */
    public MediaFrame(int[] buffer, int width, int height) {
        this.width = width;
        this.height = height;
        this.dataRGB = buffer;
    }

    /**
     * Return one Pixel of the MediaFrame at the specified position.
     *
     * @param x X-position of Pixel
     * @param y Y-position of Pixel
     * @return Pixel at specified position
     */
    public Pixel getPixelAt(int x, int y) {
        int data = dataRGB[y * width + x];
        return Pixel.createFromInt(data, Pixel.NO_CONVERSION, 0x00ff0000, 0x0000ff00, 0x000000ff);

    }

    /**
     * Return one Pixel of the MediaFrame at the specified position with the specified conversion
     *
     * @param x          X-position of the Pixel
     * @param y          Y-position of the Pixel
     * @param conversion color space conversion
     * @return
     */
    public Pixel getPixelAt(int x, int y, int conversion) {
        int data = dataRGB[y * width + x];
        return Pixel.createFromInt(data, conversion, 0x00ff0000, 0x0000ff00, 0x000000ff);
    }

    /**
     * Return one component of the specified pixel
     *
     * @param x             X-position of the Pixel
     * @param y             Y-position of the Pixel
     * @param componentMask Masking bits for component.
     * @return specified component of Pixel at x,y
     */
    public int getComponentAt(int x, int y, int componentMask) {

        int componentShift = 0;
        if (componentMask != 0) while ((componentMask >> componentShift) % 2 == 0) componentShift++;
        return ((dataRGB[y * width + x] & componentMask) >> componentShift);

    }

    /**
     * Return the RGB-data of the MediaFrame as an int array. Each value represents one Pixel
     *
     * @return
     */
    private int[] getDataRGB() {
        return dataRGB;
    }

    /**
     * Return the width of the MediaFrame
     *
     * @return
     */
    public int getWidth() {
        return this.width;
    }

    /**
     * Return the height of the MediaFrame
     *
     * @return
     */
    public int getHeight() {
        return this.height;
    }

    /**
     * return the length of the dataRGB array
     *
     * @return
     */
    public int getLength() {
        return dataRGB.length;
    }
}