RgbToYuv422p8Bit.java

package org.jcodec.scale;

import org.jcodec.common.model.Picture8Bit;

/**
 * This class is part of JCodec ( www.jcodec.org ) This software is distributed
 * under FreeBSD License
 * 
 * @author The JCodec project
 * 
 */
public class RgbToYuv422p8Bit implements Transform8Bit {

    @Override
    public void transform(Picture8Bit img, Picture8Bit dst) {

        byte[] y = img.getData()[0];
        byte[] out1 = new byte[3];
        byte[] out2 = new byte[3];
        byte[][] dstData = dst.getData();

        int off = 0, offSrc = 0;
        for (int i = 0; i < img.getHeight(); i++) {
            for (int j = 0; j < img.getWidth() >> 1; j++) {
                int offY = off << 1;

                RgbToYuv420p8Bit.rgb2yuv(y[offSrc++], y[offSrc++], y[offSrc++], out1);
                dstData[0][offY] = out1[0];

                RgbToYuv420p8Bit.rgb2yuv(y[offSrc++], y[offSrc++], y[offSrc++], out2);
                dstData[0][offY + 1] = out2[0];

                dstData[1][off] = (byte) ((out1[1] + out2[1] + 1) >> 1);
                dstData[2][off] = (byte) ((out1[2] + out2[2] + 1) >> 1);
                ++off;
            }
        }
    }
}