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diff --git a/demos/spectrum/3rdparty/fftreal/FFTRealPassDirect.h b/demos/spectrum/3rdparty/fftreal/FFTRealPassDirect.h
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@@ -0,0 +1,96 @@
+/*****************************************************************************
+
+ FFTRealPassDirect.h
+ Copyright (c) 2005 Laurent de Soras
+
+--- Legal stuff ---
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+*Tab=3***********************************************************************/
+
+
+
+#if ! defined (FFTRealPassDirect_HEADER_INCLUDED)
+#define FFTRealPassDirect_HEADER_INCLUDED
+
+#if defined (_MSC_VER)
+ #pragma once
+ #pragma warning (4 : 4250) // "Inherits via dominance."
+#endif
+
+
+
+/*\\\ INCLUDE FILES \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
+
+#include "def.h"
+#include "FFTRealFixLenParam.h"
+#include "OscSinCos.h"
+
+
+
+template <int PASS>
+class FFTRealPassDirect
+{
+
+/*\\\ PUBLIC \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
+
+public:
+
+ typedef FFTRealFixLenParam::DataType DataType;
+ typedef OscSinCos <DataType> OscType;
+
+ FORCEINLINE static void
+ process (long len, DataType dest_ptr [], DataType src_ptr [], const DataType x_ptr [], const DataType cos_ptr [], long cos_len, const long br_ptr [], OscType osc_list []);
+
+
+
+/*\\\ PROTECTED \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
+
+protected:
+
+
+
+/*\\\ PRIVATE \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
+
+private:
+
+
+
+/*\\\ FORBIDDEN MEMBER FUNCTIONS \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/
+
+private:
+
+ FFTRealPassDirect ();
+ ~FFTRealPassDirect ();
+ FFTRealPassDirect (const FFTRealPassDirect &other);
+ FFTRealPassDirect &
+ operator = (const FFTRealPassDirect &other);
+ bool operator == (const FFTRealPassDirect &other);
+ bool operator != (const FFTRealPassDirect &other);
+
+}; // class FFTRealPassDirect
+
+
+
+#include "FFTRealPassDirect.hpp"
+
+
+
+#endif // FFTRealPassDirect_HEADER_INCLUDED
+
+
+
+/*\\\ EOF \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\*/