Update libjpeg-turbo to r722.

turbojpeg.h

 /*
  * Copyright (C)2009-2011 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
@@ skipping 297 matching lines @@
 /**
  * This option will enable lossless cropping.  See #tjTransform() for more
  * information.
  */
 #define TJXOPT_CROP     4
 /**
  * This option will discard the color data in the input image and produce
  * a grayscale output image.
  */
 #define TJXOPT_GRAY     8
+/**
+ * This option will prevent #tjTransform() 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.)
+ */
+#define TJXOPT_NOOUTPUT 16
 
 
 /**
  * Scaling factor
  */
 typedef struct
 {
   /**
    * Numerator
    */
@@ skipping 27 matching lines @@
   /**
    * The height of the cropping region. Setting this to 0 is the equivalent of
    * setting it to the height of the source JPEG image - y.
    */
   int h;
 } tjregion;
 
 /**
  * Lossless transform
  */
-typedef struct
+typedef struct tjtransform
 {
   /**
    * Cropping region
    */
   tjregion r;
   /**
    * One of the @ref TJXOP "transform operations"
    */
   int op;
   /**
    * The bitwise OR of one of more of the @ref TJXOPT_CROP "transform options"
    */
   int options;
+  /**
+   * Arbitrary data that can be accessed within the body of the callback
+   * function
+   */
+  void *data;
+  /**
+   * 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 coeffs pointer to an array of transformed DCT coefficients.  (NOTE:
+   *        this pointer 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 arrayRegion #tjregion structure containing the width and height of
+   *        the array pointed to by <tt>coeffs</tt> as well as its offset
+   *        relative to the component plane.  TurboJPEG implementations may
+   *        choose to split each component plane into multiple DCT coefficient
+   *        arrays and call the callback function once for each array.
+   * @param planeRegion #tjregion structure containing the width and height of
+   *        the component plane to which <tt>coeffs</tt> belongs
+   * @param componentID ID number of the component plane to which
+   *        <tt>coeffs</tt> 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
+   *        <tt>coeffs</tt> belongs.  This is the same as the index of the
+   *        transform in the transforms array that was passed to
+   *        #tjTransform().
+   * @param transform a pointer to a #tjtransform structure that specifies the
+   *        parameters and/or cropping region for this transform
+   *
+   * @return 0 if the callback was successful, or -1 if an error occurred.
+   */
+  int (*customFilter)(short *coeffs, tjregion arrayRegion,
+    tjregion planeRegion, int componentIndex, int transformIndex,
+    struct tjtransform *transform);
 } tjtransform;
 
 /**
  * TurboJPEG instance handle
  */
 typedef void* tjhandle;
 
 
 /**
  * Pad the given width to the nearest 32-bit boundary
@@ skipping 426 matching lines @@
 
 /**
  * @}
  */
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif