GNU Radio 3.5.1 C++ API
atsci_equalizer_nop.h
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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2002 Free Software Foundation, Inc.
00004  * 
00005  * This file is part of GNU Radio
00006  * 
00007  * GNU Radio is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 3, or (at your option)
00010  * any later version.
00011  * 
00012  * GNU Radio is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  * 
00017  * You should have received a copy of the GNU General Public License
00018  * along with GNU Radio; see the file COPYING.  If not, write to
00019  * the Free Software Foundation, Inc., 51 Franklin Street,
00020  * Boston, MA 02110-1301, USA.
00021  */
00022 
00023 #ifndef _ATSC_EQUALIZER_NOP_H_
00024 #define _ATSC_EQUALIZER_NOP_H_
00025 
00026 #include <atsc_api.h>
00027 #include <atsci_equalizer.h>
00028 
00029 class ATSC_API atsci_equalizer_nop : public atsci_equalizer
00030 {
00031 private:
00032   float scale (float input) { return input; }
00033 
00034   float scale_and_train (float input);
00035   
00036 
00037 public:
00038   atsci_equalizer_nop ();
00039   virtual ~atsci_equalizer_nop ();
00040 
00041   virtual void reset ();
00042   virtual int ntaps () const;
00043   virtual int npretaps () const;
00044   
00045 protected:
00046   virtual void filter_normal (const float   *input_samples,
00047                               float *output_samples,
00048                               int   nsamples);
00049 
00050   virtual void filter_data_seg_sync (const float *input_samples,
00051                                      float *output_samples,
00052                                      int   nsamples,
00053                                      int   offset);
00054   
00055   virtual void filter_field_sync (const float *input_samples,
00056                                   float *output_samples,
00057                                   int   nsamples,
00058                                   int   offset,
00059                                   int   which_field);
00060 };
00061 
00062 
00063 #endif /* _ATSC_EQUALIZER_NOP_H_ */