diff options
| author | Albrecht Schlosser <albrechts.fltk@online.de> | 2020-01-09 19:57:49 +0100 |
|---|---|---|
| committer | Albrecht Schlosser <albrechts.fltk@online.de> | 2020-01-09 19:57:49 +0100 |
| commit | 82d279c2341c88da802b82e0d8732399d4f6b481 (patch) | |
| tree | 8689e2a5f0b4615767916acf27a7ce4cad1a1743 /jpeg/jfdctfst.c | |
| parent | 8c4930a7d76efdb9c3e627912a100e9abaf3f504 (diff) | |
Upgrade bundled libjpeg from jpeg-9a to jpeg-9c
Release: 9a - Jan 14, 2018
For further details see README.bundled-libs.txt.
Diffstat (limited to 'jpeg/jfdctfst.c')
| -rw-r--r-- | jpeg/jfdctfst.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/jpeg/jfdctfst.c b/jpeg/jfdctfst.c index 8cad5f229..5e4e01722 100644 --- a/jpeg/jfdctfst.c +++ b/jpeg/jfdctfst.c @@ -2,7 +2,7 @@ * jfdctfst.c * * Copyright (C) 1994-1996, Thomas G. Lane. - * Modified 2003-2009 by Guido Vollbeding. + * Modified 2003-2017 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. * @@ -44,7 +44,7 @@ */ #if DCTSIZE != 8 - Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */ + Sorry, this code only copes with 8x8 DCT blocks. /* deliberate syntax err */ #endif @@ -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; |