Imported Upstream version 3.2.2

[debian/gnuradio] / gnuradio-core / src / lib / general / gr_squash_ff.h

diff --git a/gnuradio-core/src/lib/general/gr_squash_ff.h b/gnuradio-core/src/lib/general/gr_squash_ff.h
new file mode 100644 (file)
index 0000000..ee3426c
--- /dev/null
+++ b/gnuradio-core/src/lib/general/gr_squash_ff.h
@@ -0,0 +1,67 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2008 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_GR_SQUASH_FF_H_
+# define       INCLUDED_GR_SQUASH_FF_H_
+
+#include <gr_sync_block.h>
+#include <gsl/gsl_errno.h>
+#include <gsl/gsl_interp.h>
+#include <gsl/gsl_spline.h>
+/*!
+ * \brief implements cheap resampling of spectrum directly from
+ * spectral points, using gsl interpolation
+ * \ingroup misc
+ */
+
+class gr_squash_ff;
+typedef boost::shared_ptr<gr_squash_ff> gr_squash_ff_sptr;
+
+gr_squash_ff_sptr gr_make_squash_ff(const std::vector<float> &igrid,
+                                   const std::vector<float> &ogrid);
+
+class gr_squash_ff : public gr_sync_block
+{
+  friend gr_squash_ff_sptr gr_make_squash_ff(const std::vector<float> &igrid,
+                                            const std::vector<float> &ogrid);
+  
+  size_t  d_inum;
+  size_t  d_onum;
+  double *d_igrid;
+  double *d_iwork;
+  double *d_ogrid;
+
+  gsl_interp_accel *d_accel;
+  gsl_spline       *d_spline;
+  
+  gr_squash_ff(const std::vector<float> &igrid,
+              const std::vector<float> &ogrid);
+
+ public:
+  ~gr_squash_ff();
+
+  int work(int noutput_items,
+          gr_vector_const_void_star &input_items,
+          gr_vector_void_star &output_items);
+};
+
+#endif