X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=gnuradio-core%2Fsrc%2Flib%2Ffilter%2Fgri_fft_filter_fff_sse.h;fp=gnuradio-core%2Fsrc%2Flib%2Ffilter%2Fgri_fft_filter_fff_sse.h;h=8258bb8242f921532c65d41da74950c8a70dad93;hb=8a9ddbb0675f9bfcc6e03b457fba6c79474a3693;hp=0000000000000000000000000000000000000000;hpb=82d471b9b4a8b389b5da44b19c69c36420828382;p=debian%2Fgnuradio

diff --git a/gnuradio-core/src/lib/filter/gri_fft_filter_fff_sse.h b/gnuradio-core/src/lib/filter/gri_fft_filter_fff_sse.h
new file mode 100644
index 00000000..8258bb82
--- /dev/null
+++ b/gnuradio-core/src/lib/filter/gri_fft_filter_fff_sse.h
@@ -0,0 +1,81 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2010 Free Software Foundation, Inc.
+ * 
+ * This file is part of GNU Radio
+ * 
+ * GNU Radio 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; either version 3, or (at your option)
+ * any later version.
+ * 
+ * GNU Radio 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 General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_GRI_FFT_FILTER_FFF_SSE_H
+#define INCLUDED_GRI_FFT_FILTER_FFF_SSE_H
+
+#include <gr_complex.h>
+#include <vector>
+
+class gri_fft_real_fwd;
+class gri_fft_real_rev;
+
+class gri_fft_filter_fff_sse
+{
+ private:
+  int			   d_ntaps;
+  int			   d_nsamples;
+  int			   d_fftsize;		// fftsize = ntaps + nsamples - 1
+  int                      d_decimation;
+  gri_fft_real_fwd	  *d_fwdfft;		// forward "plan"
+  gri_fft_real_rev	  *d_invfft;		// inverse "plan"
+  std::vector<float>       d_tail;		// state carried between blocks for overlap-add
+  //std::vector<gr_complex>  d_xformed_taps;	// Fourier xformed taps
+  gr_complex              *d_xformed_taps;
+  std::vector<float>	   d_new_taps;
+
+
+  void compute_sizes(int ntaps);
+  int tailsize() const { return d_ntaps - 1; }
+  
+ public:
+  /*!
+   * \brief Construct a FFT filter for float vectors with the given taps and decimation rate.
+   *
+   * This is the basic implementation for performing FFT filter for fast convolution
+   * in other blocks for floating point vectors (such as gr_fft_filter_fff).
+   * \param decimation The decimation rate of the filter (int)
+   * \param taps       The filter taps (float)
+   */
+  gri_fft_filter_fff_sse (int decimation, const std::vector<float> &taps);
+  ~gri_fft_filter_fff_sse ();
+
+  /*!
+   * \brief Set new taps for the filter.
+   *
+   * Sets new taps and resets the class properties to handle different sizes
+   * \param taps       The filter taps (float)
+   */
+  int set_taps (const std::vector<float> &taps);
+  
+  /*!
+   * \brief Perform the filter operation
+   *
+   * \param nitems  The number of items to produce
+   * \param input   The input vector to be filtered
+   * \param output  The result of the filter operation
+   */
+  int filter (int nitems, const float *input, float *output);
+
+};
+
+#endif /* INCLUDED_GRI_FFT_FILTER_FFF_SSE_H */