FrameUtil.java

package org.jcodec.codecs.util;
import org.jcodec.common.io.IOUtils;
import org.jcodec.common.model.Picture;

import org.jcodec.common.io.IOUtils;
import org.jcodec.common.model.Picture8Bit;

import java.io.FileInputStream;
import java.io.IOException;
import java.lang.System;

public class FrameUtil {

    public static void displayComponent(byte[] component, int width, int height, boolean decorate) {
        int widthInBlks = width >> 2;
        int heightInBlks = height >> 2;
        int stride = width;

        for (int blkY = 0; blkY < heightInBlks; blkY++) {
            if (decorate) {
                if (blkY % 4 == 0) {
                    for (int i = 0; i < stride; i++) {
                        System.out.print("====");
                    }
                    System.out.print("=========================");
                } else {
                    for (int i = 0; i < stride; i++) {
                        System.out.print("----");
                    }
                    System.out.print("-------------------------");
                }
            }
            System.out.println();
            for (int j = 0; j < 4; j++) {
                for (int blkX = 0; blkX < widthInBlks; blkX++) {
                    for (int i = 0; i < 4; i++) {
                        int offset = ((blkY << 2) + j) * stride + ((blkX << 2) + i);
                        if (decorate)
                            System.out.printf("%3d ", component[offset] + 128);
                        else
                            System.out.printf("%3d, ", component[offset] + 128);
                    }
                    if (decorate) {
                        if (blkX % 4 == 0)
                            System.out.print(" || ");
                        else
                            System.out.print(" | ");
                    }
                }
                System.out.println();
            }

        }
    }

    public static void main1(String[] args) {
        FileInputStream is = null;
        try {
            is = new FileInputStream(args[0]);
            Picture8Bit pgm = PGMIO.readPGM(is);
            displayComponent(pgm.getPlaneData(0), pgm.getWidth(), pgm.getHeight(), false);
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            IOUtils.closeQuietly(is);
        }
    }
}