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Add libjpeg-turbo 1.3.1.
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/*
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* Copyright (C)2011-2013 D. R. Commander. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name of the libjpeg-turbo Project nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.libjpegturbo.turbojpeg;
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/**
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* TurboJPEG utility class (cannot be instantiated)
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*/
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public final class TJ {
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/**
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* The number of chrominance subsampling options
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*/
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public static final int NUMSAMP = 5;
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/**
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* 4:4:4 chrominance subsampling (no chrominance subsampling). The JPEG
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* or YUV image will contain one chrominance component for every pixel in the
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* source image.
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*/
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public static final int SAMP_444 = 0;
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/**
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* 4:2:2 chrominance subsampling. The JPEG or YUV image will contain one
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* chrominance component for every 2x1 block of pixels in the source image.
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*/
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public static final int SAMP_422 = 1;
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/**
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* 4:2:0 chrominance subsampling. The JPEG or YUV image will contain one
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* chrominance component for every 2x2 block of pixels in the source image.
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*/
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public static final int SAMP_420 = 2;
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/**
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* Grayscale. The JPEG or YUV image will contain no chrominance components.
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*/
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public static final int SAMP_GRAY = 3;
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/**
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* 4:4:0 chrominance subsampling. The JPEG or YUV image will contain one
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* chrominance component for every 1x2 block of pixels in the source image.
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* Note that 4:4:0 subsampling is not fully accelerated in libjpeg-turbo.
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*/
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public static final int SAMP_440 = 4;
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/**
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* Returns the MCU block width for the given level of chrominance
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* subsampling.
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*
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* @param subsamp the level of chrominance subsampling (one of
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* <code>SAMP_*</code>)
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*
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* @return the MCU block width for the given level of chrominance subsampling
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*/
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public static int getMCUWidth(int subsamp) throws Exception {
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if (subsamp < 0 || subsamp >= NUMSAMP)
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throw new Exception("Invalid subsampling type");
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return mcuWidth[subsamp];
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}
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private static final int[] mcuWidth = {
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8, 16, 16, 8, 8
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};
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/**
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* Returns the MCU block height for the given level of chrominance
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* subsampling.
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*
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* @param subsamp the level of chrominance subsampling (one of
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* <code>SAMP_*</code>)
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*
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* @return the MCU block height for the given level of chrominance
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* subsampling
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*/
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public static int getMCUHeight(int subsamp) throws Exception {
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if (subsamp < 0 || subsamp >= NUMSAMP)
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throw new Exception("Invalid subsampling type");
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return mcuHeight[subsamp];
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}
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private static final int[] mcuHeight = {
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8, 8, 16, 8, 16
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};
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/**
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* The number of pixel formats
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*/
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public static final int NUMPF = 11;
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/**
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* RGB pixel format. The red, green, and blue components in the image are
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* stored in 3-byte pixels in the order R, G, B from lowest to highest byte
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* address within each pixel.
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*/
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public static final int PF_RGB = 0;
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/**
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* BGR pixel format. The red, green, and blue components in the image are
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* stored in 3-byte pixels in the order B, G, R from lowest to highest byte
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* address within each pixel.
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*/
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public static final int PF_BGR = 1;
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/**
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* RGBX pixel format. The red, green, and blue components in the image are
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* stored in 4-byte pixels in the order R, G, B from lowest to highest byte
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* address within each pixel. The X component is ignored when compressing
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* and undefined when decompressing.
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*/
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public static final int PF_RGBX = 2;
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/**
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* BGRX pixel format. The red, green, and blue components in the image are
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* stored in 4-byte pixels in the order B, G, R from lowest to highest byte
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* address within each pixel. The X component is ignored when compressing
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* and undefined when decompressing.
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*/
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public static final int PF_BGRX = 3;
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/**
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* XBGR pixel format. The red, green, and blue components in the image are
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* stored in 4-byte pixels in the order R, G, B from highest to lowest byte
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* address within each pixel. The X component is ignored when compressing
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* and undefined when decompressing.
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*/
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public static final int PF_XBGR = 4;
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/**
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* XRGB pixel format. The red, green, and blue components in the image are
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* stored in 4-byte pixels in the order B, G, R from highest to lowest byte
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* address within each pixel. The X component is ignored when compressing
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* and undefined when decompressing.
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*/
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public static final int PF_XRGB = 5;
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/**
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* Grayscale pixel format. Each 1-byte pixel represents a luminance
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* (brightness) level from 0 to 255.
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*/
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public static final int PF_GRAY = 6;
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/**
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* RGBA pixel format. This is the same as {@link #PF_RGBX}, except that when
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* decompressing, the X byte is guaranteed to be 0xFF, which can be
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* interpreted as an opaque alpha channel.
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*/
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public static final int PF_RGBA = 7;
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/**
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* BGRA pixel format. This is the same as {@link #PF_BGRX}, except that when
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* decompressing, the X byte is guaranteed to be 0xFF, which can be
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* interpreted as an opaque alpha channel.
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*/
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public static final int PF_BGRA = 8;
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/**
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* ABGR pixel format. This is the same as {@link #PF_XBGR}, except that when
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* decompressing, the X byte is guaranteed to be 0xFF, which can be
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* interpreted as an opaque alpha channel.
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*/
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public static final int PF_ABGR = 9;
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/**
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* ARGB pixel format. This is the same as {@link #PF_XRGB}, except that when
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* decompressing, the X byte is guaranteed to be 0xFF, which can be
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* interpreted as an opaque alpha channel.
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*/
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public static final int PF_ARGB = 10;
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/**
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* Returns the pixel size (in bytes) for the given pixel format.
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*
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* @param pixelFormat the pixel format (one of <code>PF_*</code>)
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*
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* @return the pixel size (in bytes) for the given pixel format
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*/
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public static int getPixelSize(int pixelFormat) throws Exception {
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if (pixelFormat < 0 || pixelFormat >= NUMPF)
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throw new Exception("Invalid pixel format");
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return pixelSize[pixelFormat];
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}
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private static final int[] pixelSize = {
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3, 3, 4, 4, 4, 4, 1, 4, 4, 4, 4
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};
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/**
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* For the given pixel format, returns the number of bytes that the red
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* component is offset from the start of the pixel. For instance, if a pixel
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* of format <code>TJ.PF_BGRX</code> is stored in <code>char pixel[]</code>,
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* then the red component will be
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* <code>pixel[TJ.getRedOffset(TJ.PF_BGRX)]</code>.
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*
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* @param pixelFormat the pixel format (one of <code>PF_*</code>)
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*
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* @return the red offset for the given pixel format
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*/
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public static int getRedOffset(int pixelFormat) throws Exception {
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if (pixelFormat < 0 || pixelFormat >= NUMPF)
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throw new Exception("Invalid pixel format");
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return redOffset[pixelFormat];
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}
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private static final int[] redOffset = {
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0, 2, 0, 2, 3, 1, 0, 0, 2, 3, 1
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};
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/**
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* For the given pixel format, returns the number of bytes that the green
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* component is offset from the start of the pixel. For instance, if a pixel
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* of format <code>TJ.PF_BGRX</code> is stored in <code>char pixel[]</code>,
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* then the green component will be
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* <code>pixel[TJ.getGreenOffset(TJ.PF_BGRX)]</code>.
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*
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* @param pixelFormat the pixel format (one of <code>PF_*</code>)
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*
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* @return the green offset for the given pixel format
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*/
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public static int getGreenOffset(int pixelFormat) throws Exception {
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if (pixelFormat < 0 || pixelFormat >= NUMPF)
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throw new Exception("Invalid pixel format");
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return greenOffset[pixelFormat];
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}
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private static final int[] greenOffset = {
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1, 1, 1, 1, 2, 2, 0, 1, 1, 2, 2
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};
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/**
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* For the given pixel format, returns the number of bytes that the blue
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* component is offset from the start of the pixel. For instance, if a pixel
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* of format <code>TJ.PF_BGRX</code> is stored in <code>char pixel[]</code>,
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* then the blue component will be
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* <code>pixel[TJ.getBlueOffset(TJ.PF_BGRX)]</code>.
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*
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* @param pixelFormat the pixel format (one of <code>PF_*</code>)
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*
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* @return the blue offset for the given pixel format
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*/
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public static int getBlueOffset(int pixelFormat) throws Exception {
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if (pixelFormat < 0 || pixelFormat >= NUMPF)
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throw new Exception("Invalid pixel format");
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return blueOffset[pixelFormat];
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}
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private static final int[] blueOffset = {
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2, 0, 2, 0, 1, 3, 0, 2, 0, 1, 3
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};
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/**
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* The uncompressed source/destination image is stored in bottom-up (Windows,
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* OpenGL) order, not top-down (X11) order.
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*/
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public static final int FLAG_BOTTOMUP = 2;
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/**
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* Turn off CPU auto-detection and force TurboJPEG to use MMX code
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* (if the underlying codec supports it.)
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*/
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public static final int FLAG_FORCEMMX = 8;
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/**
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* Turn off CPU auto-detection and force TurboJPEG to use SSE code
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* (if the underlying codec supports it.)
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*/
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public static final int FLAG_FORCESSE = 16;
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/**
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* Turn off CPU auto-detection and force TurboJPEG to use SSE2 code
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* (if the underlying codec supports it.)
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*/
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public static final int FLAG_FORCESSE2 = 32;
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/**
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* Turn off CPU auto-detection and force TurboJPEG to use SSE3 code
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* (if the underlying codec supports it.)
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*/
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public static final int FLAG_FORCESSE3 = 128;
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/**
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* When decompressing an image that was compressed using chrominance
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* subsampling, use the fastest chrominance upsampling algorithm available in
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* the underlying codec. The default is to use smooth upsampling, which
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* creates a smooth transition between neighboring chrominance components in
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* order to reduce upsampling artifacts in the decompressed image.
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*/
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public static final int FLAG_FASTUPSAMPLE = 256;
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/**
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* Use the fastest DCT/IDCT algorithm available in the underlying codec. The
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* default if this flag is not specified is implementation-specific. For
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* example, the implementation of TurboJPEG for libjpeg[-turbo] uses the fast
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* algorithm by default when compressing, because this has been shown to have
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* only a very slight effect on accuracy, but it uses the accurate algorithm
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* when decompressing, because this has been shown to have a larger effect.
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*/
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public static final int FLAG_FASTDCT = 2048;
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/**
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* Use the most accurate DCT/IDCT algorithm available in the underlying
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* codec. The default if this flag is not specified is
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* implementation-specific. For example, the implementation of TurboJPEG for
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* libjpeg[-turbo] uses the fast algorithm by default when compressing,
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* because this has been shown to have only a very slight effect on accuracy,
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* but it uses the accurate algorithm when decompressing, because this has
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* been shown to have a larger effect.
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*/
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public static final int FLAG_ACCURATEDCT = 4096;
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/**
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* Returns the maximum size of the buffer (in bytes) required to hold a JPEG
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* image with the given width, height, and level of chrominance subsampling.
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*
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* @param width the width (in pixels) of the JPEG image
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*
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* @param height the height (in pixels) of the JPEG image
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*
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* @param jpegSubsamp the level of chrominance subsampling to be used when
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* generating the JPEG image (one of {@link TJ TJ.SAMP_*})
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*
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* @return the maximum size of the buffer (in bytes) required to hold a JPEG
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* image with the given width, height, and level of chrominance subsampling
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*/
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public static native int bufSize(int width, int height, int jpegSubsamp)
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throws Exception;
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/**
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* Returns the size of the buffer (in bytes) required to hold a YUV planar
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* image with the given width, height, and level of chrominance subsampling.
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*
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* @param width the width (in pixels) of the YUV image
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*
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* @param height the height (in pixels) of the YUV image
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*
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* @param subsamp the level of chrominance subsampling used in the YUV
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* image (one of {@link TJ TJ.SAMP_*})
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*
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* @return the size of the buffer (in bytes) required to hold a YUV planar
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* image with the given width, height, and level of chrominance subsampling
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*/
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public static native int bufSizeYUV(int width, int height, int subsamp)
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throws Exception;
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/**
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* Returns a list of fractional scaling factors that the JPEG decompressor in
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* this implementation of TurboJPEG supports.
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*
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* @return a list of fractional scaling factors that the JPEG decompressor in
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* this implementation of TurboJPEG supports
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*/
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public static native TJScalingFactor[] getScalingFactors()
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throws Exception;
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static {
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TJLoader.load();
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}
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};
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