README change

1 files changed, 59 insertions, 0 deletions

diff --git a/gr-fft/lib/fft_vfc_fftw.h b/gr-fft/lib/fft_vfc_fftw.h
new file mode 100644
index 000000000..1b6f78ba6
--- /dev/null
+++ b/gr-fft/lib/fft_vfc_fftw.h
@@ -0,0 +1,59 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2007,2008,2012 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_FFT_FFT_VFC_FFTW_IMPL_H
+#define INCLUDED_FFT_FFT_VFC_FFTW_IMPL_H
+
+#include <fft/fft_vfc.h>
+#include <fft/fft.h>
+
+namespace gr {
+  namespace fft {
+    
+    class FFT_API fft_vfc_fftw : public fft_vfc
+    {
+    private:
+      fft_complex          *d_fft;
+      unsigned int          d_fft_size;
+      std::vector<float>    d_window;
+      bool                  d_forward;
+      
+    public:
+      fft_vfc_fftw(int fft_size, bool forward,
+		   const std::vector<float> &window,
+		   int nthreads=1);
+      
+      ~fft_vfc_fftw();
+      
+      void set_nthreads(int n);
+      int nthreads() const;
+      bool set_window(const std::vector<float> &window);
+      
+      int work(int noutput_items,
+	       gr_vector_const_void_star &input_items,
+	       gr_vector_void_star &output_items);
+    };
+
+  } /* namespace fft */
+} /* namespace gr */
+
+#endif /* INCLUDED_FFT_FFT_VFC_FFTW_IMPL_H */