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The Independent JPEG Group's JPEG software v9b

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This commit is contained in:
Guido Vollbeding
2016-01-17 00:00:00 +00:00
committed by DRC
parent fc11193e7a
commit a560e4b423
53 changed files with 7614 additions and 5008 deletions
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6
jfdctfst.c
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@@ -2,7 +2,7 @@
* jfdctfst.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.
*
@@ -109,6 +109,8 @@
/*
* Perform the forward DCT on one block of samples.
*
* cK represents cos(K*pi/16).
*/
GLOBAL(void)
@@ -145,7 +147,7 @@ jpeg_fdct_ifast (DCTELEM * data, JSAMPARRAY sample_data, JDIMENSION start_col)
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;