nom.tam.fits.compression.algorithm.uncompressed.NoCompressCompressor Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of nom-tam-fits Show documentation
Java library for reading and writing FITS files. FITS, the Flexible Image Transport System, is the format commonly used in the archiving and transport of astronomical data.
There is a newer version: 1.20.2
Show newest version
package nom.tam.fits.compression.algorithm.uncompressed;

import java.nio.Buffer;
import java.nio.ByteBuffer;
import java.nio.DoubleBuffer;
import java.nio.FloatBuffer;
import java.nio.IntBuffer;
import java.nio.LongBuffer;
import java.nio.ShortBuffer;

import nom.tam.fits.compression.algorithm.api.ICompressor;
import nom.tam.util.type.PrimitiveTypes;

/*
 * #%L
 * nom.tam FITS library
 * %%
 * Copyright (C) 1996 - 2015 nom-tam-fits
 * %%
 * This is free and unencumbered software released into the public domain.
 * 
 * Anyone is free to copy, modify, publish, use, compile, sell, or
 * distribute this software, either in source code form or as a compiled
 * binary, for any purpose, commercial or non-commercial, and by any
 * means.
 * 
 * In jurisdictions that recognize copyright laws, the author or authors
 * of this software dedicate any and all copyright interest in the
 * software to the public domain. We make this dedication for the benefit
 * of the public at large and to the detriment of our heirs and
 * successors. We intend this dedication to be an overt act of
 * relinquishment in perpetuity of all present and future rights to this
 * software under copyright law.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 * #L%
 */

/**
 * This compression algorithm will just copy the input to the output and do
 * nothing at all.
 *
 * @param 
 *            the buffer type of the pixel data
 */
public abstract class NoCompressCompressor implements ICompressor {

    public static class ByteNoCompressCompressor extends NoCompressCompressor {

        @Override
        public boolean compress(ByteBuffer pixelData, ByteBuffer compressed) {
            compressed.put(pixelData);
            return true;
        }

        @Override
        public void decompress(ByteBuffer compressed, ByteBuffer pixelData) {
            pixelData.put(compressed);
        }
    }

    public static class DoubleNoCompressCompressor extends NoCompressCompressor {

        @Override
        public boolean compress(DoubleBuffer pixelData, ByteBuffer compressed) {
            int size = pixelData.remaining();
            compressed.asDoubleBuffer().put(pixelData);
            compressed.position(compressed.position() + size * PrimitiveTypes.DOUBLE.size());
            return true;
        }

        @Override
        public void decompress(ByteBuffer compressed, DoubleBuffer pixelData) {
            pixelData.put(compressed.asDoubleBuffer());
        }
    }

    public static class FloatNoCompressCompressor extends NoCompressCompressor {

        @Override
        public boolean compress(FloatBuffer pixelData, ByteBuffer compressed) {
            int size = pixelData.remaining();
            compressed.asFloatBuffer().put(pixelData);
            compressed.position(compressed.position() + size * PrimitiveTypes.FLOAT.size());

            return true;
        }

        @Override
        public void decompress(ByteBuffer compressed, FloatBuffer pixelData) {
            pixelData.put(compressed.asFloatBuffer());
        }
    }

    public static class IntNoCompressCompressor extends NoCompressCompressor {

        @Override
        public boolean compress(IntBuffer pixelData, ByteBuffer compressed) {
            int size = pixelData.remaining();
            compressed.asIntBuffer().put(pixelData);
            compressed.position(compressed.position() + size * PrimitiveTypes.INT.size());
            return true;
        }

        @Override
        public void decompress(ByteBuffer compressed, IntBuffer pixelData) {
            pixelData.put(compressed.asIntBuffer());
        }
    }

    public static class LongNoCompressCompressor extends NoCompressCompressor {

        @Override
        public boolean compress(LongBuffer pixelData, ByteBuffer compressed) {
            int size = pixelData.remaining();
            compressed.asLongBuffer().put(pixelData);
            compressed.position(compressed.position() + size * PrimitiveTypes.LONG.size());
            return true;
        }

        @Override
        public void decompress(ByteBuffer compressed, LongBuffer pixelData) {
            pixelData.put(compressed.asLongBuffer());
        }
    }

    public static class ShortNoCompressCompressor extends NoCompressCompressor {

        @Override
        public boolean compress(ShortBuffer pixelData, ByteBuffer compressed) {
            int size = pixelData.remaining();
            compressed.asShortBuffer().put(pixelData);
            compressed.position(compressed.position() + size * PrimitiveTypes.SHORT.size());
            return true;
        }

        @Override
        public void decompress(ByteBuffer compressed, ShortBuffer pixelData) {
            pixelData.put(compressed.asShortBuffer());
        }
    }

}