diff options
Diffstat (limited to 'java/org/libjpegturbo')
| -rw-r--r-- | java/org/libjpegturbo/turbojpeg/TJCustomFilter.java | 76 | ||||
| -rw-r--r-- | java/org/libjpegturbo/turbojpeg/TJTransform.java | 42 |
2 files changed, 107 insertions, 11 deletions
diff --git a/java/org/libjpegturbo/turbojpeg/TJCustomFilter.java b/java/org/libjpegturbo/turbojpeg/TJCustomFilter.java new file mode 100644 index 00000000..711225b7 --- /dev/null +++ b/java/org/libjpegturbo/turbojpeg/TJCustomFilter.java @@ -0,0 +1,76 @@ +/* + * Copyright (C)2011 D. R. Commander. 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 libjpeg-turbo Project 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 HOLDERS 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, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +package org.libjpegturbo.turbojpeg; + +import java.awt.*; +import java.nio.*; + +/** + * Custom filter callback interface + */ +public interface TJCustomFilter { + + /** + * A callback function that can be used to modify the DCT coefficients after + * they are losslessly transformed but before they are transcoded to a new + * JPEG file. This allows for custom filters or other transformations to be + * applied in the frequency domain. + * + * @param coeffBuffer a buffer containing transformed DCT coefficients. + * (NOTE: this buffer is not guaranteed to be valid once the callback + * returns, so applications wishing to hand off the DCT coefficients to + * another function or library should make a copy of them within the body of + * the callback.) + * + * @param bufferRegion rectangle containing the width and height of + * <code>coeffBuffer</code> as well as its offset relative to the component + * plane. TurboJPEG implementations may choose to split each component plane + * into multiple DCT coefficient buffers and call the callback function once + * for each buffer. + * + * @param planeRegion rectangle containing the width and height of the + * component plane to which <code>coeffBuffer</code> belongs + * + * @param componentID ID number of the component plane to which + * <code>coeffBuffer</code>belongs (Y, Cb, and Cr have, respectively, ID's of + * 0, 1, and 2 in typical JPEG images.) + * + * @param transformID ID number of the transformed image to which + * <code>coeffBuffer</code> belongs. This is the same as the index of the + * transform in the transforms array that was passed to {@link + * TJTransformer#transform TJTransformer.transform()}. + * + * @param transform a {@link TJTransform} instance that specifies the + * parameters and/or cropping region for this transform + */ + public void customFilter(ShortBuffer coeffBuffer, Rectangle bufferRegion, + Rectangle planeRegion, int componentID, int transformID, + TJTransform transform) + throws Exception; +} diff --git a/java/org/libjpegturbo/turbojpeg/TJTransform.java b/java/org/libjpegturbo/turbojpeg/TJTransform.java index 3f4eb380..b9fbad56 100644 --- a/java/org/libjpegturbo/turbojpeg/TJTransform.java +++ b/java/org/libjpegturbo/turbojpeg/TJTransform.java @@ -37,7 +37,6 @@ public class TJTransform extends Rectangle { private static final long serialVersionUID = -127367705761430371L; - /** * The number of lossless transform operations */ @@ -104,21 +103,29 @@ public class TJTransform extends Rectangle { * partial MCU blocks that cannot be transformed will be left in place, which * will create odd-looking strips on the right or bottom edge of the image. */ - final public static int OPT_PERFECT = 1; + final public static int OPT_PERFECT = 1; /** * This option will discard any partial MCU blocks that cannot be * transformed. */ - final public static int OPT_TRIM = 2; + final public static int OPT_TRIM = 2; /** * This option will enable lossless cropping. */ - final public static int OPT_CROP = 4; + final public static int OPT_CROP = 4; /** * This option will discard the color data in the input image and produce * a grayscale output image. */ - final public static int OPT_GRAY = 8; + final public static int OPT_GRAY = 8; + /** + * This option will prevent {@link TJTransformer#transform + * TJTransformer.transform()} from outputting a JPEG image for this + * particular transform. This can be used in conjunction with a custom + * filter to capture the transformed DCT coefficients without transcoding + * them. + */ + final public static int OPT_NOOUTPUT = 16; /** @@ -146,28 +153,36 @@ public class TJTransform extends Rectangle { * * @param options the bitwise OR of one or more of the transform options * (<code>OPT_*</code>) + * + * @param cf an instance of an object that implements the {@link + * TJCustomFilter} interface, or null if no custom filter is needed */ - public TJTransform(int x, int y, int w, int h, int op, int options) - throws Exception { + public TJTransform(int x, int y, int w, int h, int op, int options, + TJCustomFilter cf) throws Exception { super(x, y, w, h); - this.op = op; this.options = options; + this.op = op; this.options = options; this.cf = cf; } /** * Create a new lossless transform instance with the given parameters. * * @param r a <code>Rectangle</code> instance which specifies the cropping - * region. See {@link #TJTransform(int, int, int, int, int, int)} for more + * region. See {@link + * #TJTransform(int, int, int, int, int, int, TJCustomFilter)} for more * detail. * * @param op one of the transform operations (<code>OP_*</code>) * * @param options the bitwise OR of one or more of the transform options * (<code>OPT_*</code>) + * + * @param cf an instance of an object that implements the {@link + * TJCustomFilter} interface, or null if no custom filter is needed */ - public TJTransform(Rectangle r, int op, int options) throws Exception { + public TJTransform(Rectangle r, int op, int options, + TJCustomFilter cf) throws Exception { super(r); - this.op = op; this.options = options; + this.op = op; this.options = options; this.cf = cf; } /** @@ -179,4 +194,9 @@ public class TJTransform extends Rectangle { * Transform options (bitwise OR of one or more of <code>OPT_*</code>) */ public int options = 0; + + /** + * Custom filter instance + */ + public TJCustomFilter cf = null; } |