* jfdctflt.c
*
* Copyright (C) 1994-1996, Thomas G. Lane.
- * Modified 2003-2009 by Guido Vollbeding.
+ * Modified 2003-2015 by Guido Vollbeding.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
/*
* Perform the forward DCT on one block of samples.
+ *
+ * cK represents cos(K*pi/16).
*/
GLOBAL(void)
tmp11 = tmp1 + tmp2;
tmp12 = tmp1 - tmp2;
- /* Apply unsigned->signed conversion */
+ /* Apply unsigned->signed conversion. */
dataptr[0] = tmp10 + tmp11 - 8 * CENTERJSAMPLE; /* phase 3 */
dataptr[4] = tmp10 - tmp11;