summaryrefslogtreecommitdiffstats
path: root/gst-libs/gst/idct/floatidct.c
diff options
context:
space:
mode:
authorChristian Schaller <uraeus@gnome.org>2005-05-06 11:41:28 +0000
committerChristian Schaller <uraeus@gnome.org>2005-05-06 11:41:28 +0000
commit086b25d40a8fc3606d70c32af7f6af178e2d804d (patch)
tree2b138bca28d921d8798599f2c745d8014ec631ba /gst-libs/gst/idct/floatidct.c
parent4cb81e7ecbdc6376e5c676dcffa11758434acd1e (diff)
downloadgst-plugins-bad-086b25d40a8fc3606d70c32af7f6af178e2d804d.tar.gz
gst-plugins-bad-086b25d40a8fc3606d70c32af7f6af178e2d804d.tar.bz2
gst-plugins-bad-086b25d40a8fc3606d70c32af7f6af178e2d804d.zip
remove gst-libs from gst-plugins module as it is in gst-plugins-base now
Original commit message from CVS: remove gst-libs from gst-plugins module as it is in gst-plugins-base now
Diffstat (limited to 'gst-libs/gst/idct/floatidct.c')
-rw-r--r--gst-libs/gst/idct/floatidct.c106
1 files changed, 0 insertions, 106 deletions
diff --git a/gst-libs/gst/idct/floatidct.c b/gst-libs/gst/idct/floatidct.c
deleted file mode 100644
index 65e01d40..00000000
--- a/gst-libs/gst/idct/floatidct.c
+++ /dev/null
@@ -1,106 +0,0 @@
-/* Reference_IDCT.c, Inverse Discrete Fourier Transform, double precision */
-
-/* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */
-
-/*
- * Disclaimer of Warranty
- *
- * These software programs are available to the user without any license fee or
- * royalty on an "as is" basis. The MPEG Software Simulation Group disclaims
- * any and all warranties, whether express, implied, or statuary, including any
- * implied warranties or merchantability or of fitness for a particular
- * purpose. In no event shall the copyright-holder be liable for any
- * incidental, punitive, or consequential damages of any kind whatsoever
- * arising from the use of these programs.
- *
- * This disclaimer of warranty extends to the user of these programs and user's
- * customers, employees, agents, transferees, successors, and assigns.
- *
- * The MPEG Software Simulation Group does not represent or warrant that the
- * programs furnished hereunder are free of infringement of any third-party
- * patents.
- *
- * Commercial implementations of MPEG-1 and MPEG-2 video, including shareware,
- * are subject to royalty fees to patent holders. Many of these patents are
- * general enough such that they are unavoidable regardless of implementation
- * design.
- *
- */
-
-/* Perform IEEE 1180 reference (64-bit floating point, separable 8x1
- * direct matrix multiply) Inverse Discrete Cosine Transform
-*/
-
-
-/* Here we use math.h to generate constants. Compiler results may
- vary a little */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <math.h>
-
-#ifndef PI
-# ifdef M_PI
-# define PI M_PI
-# else
-# define PI 3.14159265358979323846
-# endif
-#endif
-
-/* private data */
-
-/* cosine transform matrix for 8x1 IDCT */
-static double gst_idct_float_c[8][8];
-
-/* initialize DCT coefficient matrix */
-
-void
-gst_idct_init_float_idct ()
-{
- int freq, time;
- double scale;
-
- for (freq = 0; freq < 8; freq++) {
- scale = (freq == 0) ? sqrt (0.125) : 0.5;
- for (time = 0; time < 8; time++)
- gst_idct_float_c[freq][time] =
- scale * cos ((PI / 8.0) * freq * (time + 0.5));
- }
-}
-
-/* perform IDCT matrix multiply for 8x8 coefficient block */
-
-void
-gst_idct_float_idct (block)
- short *block;
-{
- int i, j, k, v;
- double partial_product;
- double tmp[64];
-
- for (i = 0; i < 8; i++)
- for (j = 0; j < 8; j++) {
- partial_product = 0.0;
-
- for (k = 0; k < 8; k++)
- partial_product += gst_idct_float_c[k][j] * block[8 * i + k];
-
- tmp[8 * i + j] = partial_product;
- }
-
- /* Transpose operation is integrated into address mapping by switching
- loop order of i and j */
-
- for (j = 0; j < 8; j++)
- for (i = 0; i < 8; i++) {
- partial_product = 0.0;
-
- for (k = 0; k < 8; k++)
- partial_product += gst_idct_float_c[k][i] * tmp[8 * k + j];
-
- v = (int) floor (partial_product + 0.5);
- block[8 * i + j] = (v < -256) ? -256 : ((v > 255) ? 255 : v);
- }
-}