Imported Upstream version 3.2.2

[debian/gnuradio] / gnuradio-core / src / lib / runtime / gr_sync_interpolator.h

diff --git a/gnuradio-core/src/lib/runtime/gr_sync_interpolator.h b/gnuradio-core/src/lib/runtime/gr_sync_interpolator.h
new file mode 100644 (file)
index 0000000..0363bc5
--- /dev/null
+++ b/gnuradio-core/src/lib/runtime/gr_sync_interpolator.h
@@ -0,0 +1,68 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2004,2008 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_SYNC_INTERPOLATOR_H
+#define INCLUDED_GR_SYNC_INTERPOLATOR_H
+
+#include <gr_sync_block.h>
+
+/*!
+ * \brief synchronous 1:N input to output with history
+ * \ingroup base_blk
+ *
+ * Override work to provide the signal processing implementation.
+ */
+class gr_sync_interpolator : public gr_sync_block
+{
+ private:
+  unsigned     d_interpolation;
+
+ protected:
+  gr_sync_interpolator (const std::string &name,
+                       gr_io_signature_sptr input_signature,
+                       gr_io_signature_sptr output_signature,
+                       unsigned interpolation);
+ public:
+
+  unsigned interpolation () const { return d_interpolation; }
+  void set_interpolation (unsigned interpolation)
+  {
+    d_interpolation = interpolation;
+    set_relative_rate (1.0 * interpolation);
+    set_output_multiple (interpolation);
+  }
+
+  // gr_sync_interpolator overrides these to assist work
+  void forecast (int noutput_items, gr_vector_int &ninput_items_required);
+  int  general_work (int noutput_items,
+                    gr_vector_int &ninput_items,
+                    gr_vector_const_void_star &input_items,
+                    gr_vector_void_star &output_items);
+
+  // derived classes should override work
+
+  int fixed_rate_ninput_to_noutput(int ninput);
+  int fixed_rate_noutput_to_ninput(int noutput);
+};
+
+
+#endif /* INCLUDED_GR_SYNC_INTERPOLATOR_H */