Merge branch 'upstream' into dfsg-orig

[debian/gnuradio] / gr-atsc / src / lib / GrAtscBitTimingLoop.h

diff --git a/gr-atsc/src/lib/GrAtscBitTimingLoop.h b/gr-atsc/src/lib/GrAtscBitTimingLoop.h
new file mode 100644 (file)
index 0000000..9fcffcf
--- /dev/null
+++ b/gr-atsc/src/lib/GrAtscBitTimingLoop.h
@@ -0,0 +1,90 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2002 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 _GRATSCBITTIMINGLOOP_H_
+#define _GRATSCBITTIMINGLOOP_H_
+
+#include <gr_nco.h>
+#include <VrSigProc.h>
+#include <VrHistoryProc.h>
+#include <VrDecimatingSigProc.h>
+#include <interleaver_fifo.h>
+#include <gr_single_pole_iir.h>
+#include <gr_mmse_fir_interpolator.h>
+#include <atsci_slicer_agc.h>
+#include <stdio.h>
+#include <atsci_diag_output.h>
+
+
+/*!
+ * \brief ATSC BitTimingLoop
+ *
+ * This class accepts a single real input and produces a single real output
+ */
+
+class GrAtscBitTimingLoop : public VrDecimatingSigProc<float,float> {
+
+ public:
+
+  GrAtscBitTimingLoop ();
+  virtual ~GrAtscBitTimingLoop () { };
+
+  virtual const char *name () { return "GrAtscBitTimingLoop"; }
+
+  virtual int forecast (VrSampleRange output,
+                       VrSampleRange inputs[]);
+
+  virtual int work (VrSampleRange output, void *o[],
+                   VrSampleRange inputs[], void *i[]);
+
+  // debug
+  void set_mu (double a_mu) { mu = a_mu; }
+  void set_no_update (bool a_no_update) { debug_no_update = a_no_update; }
+  void set_loop_filter_tap (double tap)  { loop.set_taps (tap); }
+  void set_timing_rate (double rate)     { d_timing_rate = rate; }
+
+ protected:
+
+  typedef float iType;
+  typedef float oType;
+
+  iType produce_sample (const iType *in, unsigned int &index);
+  double filter_error (double e);
+
+  VrSampleIndex                                next_input;
+  gr_mmse_fir_interpolator             intr;
+  double                               w;              // timing control word
+  double                               mu;             // fractional delay
+  iType                                        last_right;     // last right hand sample
+  gr_single_pole_iir<double,double,double>     loop;
+  bool                                 debug_no_update;// debug
+
+  double                               d_loop_filter_tap;
+  double                               d_timing_rate;
+  
+#ifdef _BT_DIAG_OUTPUT_
+  FILE                                 *fp_loop;
+  FILE                                 *fp_ps;
+#endif
+};
+
+#endif // _GRATSCBITTIMINGLOOP_H_