YCbCrUpsamplerStreamTest.java

/*
 * Copyright (c) 2013, Harald Kuhr
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice, this
 *   list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * * Neither the name of the copyright holder nor the names of its
 *   contributors may be used to endorse or promote products derived from
 *   this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.twelvemonkeys.imageio.plugins.tiff;

import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;

/**
 * YCbCrUpsamplerStreamTest
 *
 * @author <a href="mailto:harald.kuhr@gmail.com">Harald Kuhr</a>
 * @author last modified by $Author: haraldk$
 * @version $Id: YCbCrUpsamplerStreamTest.java,v 1.0 31.01.13 14:35 haraldk Exp$
 */
public class YCbCrUpsamplerStreamTest  {
    @Test
    public void testCreateNullStream() {
        assertThrows(IllegalArgumentException.class, () -> new YCbCrUpsamplerStream(null, new int[2], 7, 5));
    }

    @Test
    public void testCreateNullChroma() {
        assertThrows(IllegalArgumentException.class, () -> new YCbCrUpsamplerStream(new ByteArrayInputStream(new byte[0]), new int[3], 7, 5));
    }

    @Test
    public void testCreateShortChroma() {
        assertThrows(IllegalArgumentException.class, () -> new YCbCrUpsamplerStream(new ByteArrayInputStream(new byte[0]), new int[1], 7, 5));
    }

    @Test
    public void testUpsample22() throws IOException {
        byte[] bytes = new byte[] {
                1, 2, 3, 4, 5, 6, 7, 8, 42, 96,
                108, 109, 110, 111, 112, 113, 114, 115, 43, 97
        };
        InputStream stream = new YCbCrUpsamplerStream(new ByteArrayInputStream(bytes), new int[] {2, 2}, TIFFExtension.YCBCR_POSITIONING_CENTERED, 8);

        byte[] expected = new byte[] {
                1, 5, 6, 2, 5, 6, 7, 108, 109, 8, 108, 109, 110, 114, 115, 111, 114, 115, 43, 0, 0, 97, 0, 0,
                3, 5, 6, 4, 5, 6, 42, 108, 109, 96, 108, 109, 112, 114, 115, 113, 114, 115, 0, 0, 0, 0, 0, 0
        };
        byte[] upsampled = new byte[expected.length];

        new DataInputStream(stream).readFully(upsampled);


        assertArrayEquals(expected, upsampled);
        assertEquals(-1, stream.read());
    }

    @Test
    public void testUpsample21() throws IOException {
        byte[] bytes = new byte[] {
                1, 2, 3, 4, 42, 96, 77,
                112, 113, 114, 115, 43, 97, 43
        };
        InputStream stream = new YCbCrUpsamplerStream(new ByteArrayInputStream(bytes), new int[] {2, 1}, TIFFExtension.YCBCR_POSITIONING_CENTERED, 4);

        byte[] expected = new byte[] {
                1, 3, 4, 2, 3, 4, 42, 77, 112, 96, 77, 112, 113, 115, 43, 114, 115, 43, 97, 77, 112, 43, 77, 112
        };
        byte[] upsampled = new byte[expected.length];

        new DataInputStream(stream).readFully(upsampled);

        assertArrayEquals(expected, upsampled);
        assertEquals(-1, stream.read());
    }

    @Test
    public void testUpsample12() throws IOException {
        byte[] bytes = new byte[] {
                1, 2, 3, 4, 42, 96, 77,
                112, 113, 114, 115, 43, 97, 43
        };
        InputStream stream = new YCbCrUpsamplerStream(new ByteArrayInputStream(bytes), new int[] {1, 2}, TIFFExtension.YCBCR_POSITIONING_CENTERED, 4);

        byte[] expected = new byte[] {
                1, 3, 4, 42, 77, 112, 113, 115, 43, 97, 0, 0, 2, 3, 4, 96, 77, 112, 114, 115, 43, 43, 0, 0
        };
        byte[] upsampled = new byte[expected.length];

        new DataInputStream(stream).readFully(upsampled);

        assertArrayEquals(expected, upsampled);
        assertEquals(-1, stream.read());
    }
}