| /* |
| * Copyright (C)2011, 2013 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 <code>transforms</code> 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 |
| */ |
| void customFilter(ShortBuffer coeffBuffer, Rectangle bufferRegion, |
| Rectangle planeRegion, int componentID, int transformID, |
| TJTransform transform) |
| throws Exception; |
| } |