From e2de64d6f1beb9e492daf5b886e19933c1fa41dd Mon Sep 17 00:00:00 2001
From: toma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>
Date: Wed, 25 Nov 2009 17:56:58 +0000
Subject: Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
 BUG:215923

git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdemultimedia@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
---
 noatun/modules/winskin/vis/realFFT.h | 69 ++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 noatun/modules/winskin/vis/realFFT.h

(limited to 'noatun/modules/winskin/vis/realFFT.h')

diff --git a/noatun/modules/winskin/vis/realFFT.h b/noatun/modules/winskin/vis/realFFT.h
new file mode 100644
index 00000000..39c6dbfd
--- /dev/null
+++ b/noatun/modules/winskin/vis/realFFT.h
@@ -0,0 +1,69 @@
+/*
+  a FFT class
+  Copyright (C) 1998  Martin Vogt;Philip VanBaren
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation.
+
+  For more information look at the file COPYRIGHT in this package
+
+ */
+
+
+
+
+#ifndef __REALFFT_H
+#define __REALFFT_H
+
+#include <math.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+/**
+ <pre>
+ *     Program: REALFFTF.C
+ *      Author: Philip VanBaren
+ *        Date: 2 September 1993
+ *
+ * Description: These routines perform an FFT on real data.
+ *              On a 486/33 compiled using Borland C++ 3.1 with full
+ *              speed optimization and a small memory model, a 1024 point 
+ *              FFT takes about 16ms.
+ *              This code is for floating point data.
+ *
+ *  Note: Output is BIT-REVERSED! so you must use the BitReversed to
+ *        get legible output, (i.e. Real_i = buffer[ BitReversed[i] ]
+ *                                  Imag_i = buffer[ BitReversed[i]+1 ] )
+ *        Input is in normal order.
+ </pre>
+ */
+
+
+
+class RealFFT {
+
+  int* BitReversed;
+  short* SinTable;
+  int Points;
+
+ public:
+  RealFFT(int fftlen);
+  ~RealFFT();
+
+  void fft(short* buffer);
+  int* getBitReversed();
+
+ private:
+
+  short *A,*B;
+  short *sptr;
+  short *endptr1,*endptr2;
+  int *br1,*br2;
+  long HRplus,HRminus,HIplus,HIminus;
+
+
+};
+
+
+#endif
-- 
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