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| <pre>public interface <span class="strong">TJCustomFilter</span></pre> |
| <div class="block">Custom filter callback interface</div> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../org/libjpegturbo/turbojpeg/TJCustomFilter.html#customFilter(java.nio.ShortBuffer,%20java.awt.Rectangle,%20java.awt.Rectangle,%20int,%20int,%20org.libjpegturbo.turbojpeg.TJTransform)">customFilter</a></strong>(java.nio.ShortBuffer coeffBuffer, |
| java.awt.Rectangle bufferRegion, |
| java.awt.Rectangle planeRegion, |
| int componentID, |
| int transformID, |
| <a href="../../../org/libjpegturbo/turbojpeg/TJTransform.html" title="class in org.libjpegturbo.turbojpeg">TJTransform</a> transform)</code> |
| <div class="block">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 image.</div> |
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| <h4>customFilter</h4> |
| <pre>void customFilter(java.nio.ShortBuffer coeffBuffer, |
| java.awt.Rectangle bufferRegion, |
| java.awt.Rectangle planeRegion, |
| int componentID, |
| int transformID, |
| <a href="../../../org/libjpegturbo/turbojpeg/TJTransform.html" title="class in org.libjpegturbo.turbojpeg">TJTransform</a> transform) |
| throws <a href="../../../org/libjpegturbo/turbojpeg/TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></pre> |
| <div class="block">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 image. This allows for custom filters or other transformations to be |
| applied in the frequency domain.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>coeffBuffer</code> - 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.)</dd><dd><code>bufferRegion</code> - 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.</dd><dd><code>planeRegion</code> - rectangle containing the width and height of the |
| component plane to which <code>coeffBuffer</code> belongs</dd><dd><code>componentID</code> - 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.)</dd><dd><code>transformID</code> - 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 <a href="../../../org/libjpegturbo/turbojpeg/TJTransformer.html#transform(byte[][],%20org.libjpegturbo.turbojpeg.TJTransform[],%20int)"><code>TJTransformer.transform()</code></a>.</dd><dd><code>transform</code> - a <a href="../../../org/libjpegturbo/turbojpeg/TJTransform.html" title="class in org.libjpegturbo.turbojpeg"><code>TJTransform</code></a> instance that specifies the |
| parameters and/or cropping region for this transform</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../org/libjpegturbo/turbojpeg/TJException.html" title="class in org.libjpegturbo.turbojpeg">TJException</a></code></dd></dl> |
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