GNU Radio 3.7.1 C++ API
field_sync_mux.h
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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2006 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 INCLUDED_ATSC_FIELD_SYNC_MUX_H
00024 #define INCLUDED_ATSC_FIELD_SYNC_MUX_H
00025 
00026 #include <gnuradio/atsc/api.h>
00027 #include <gnuradio/sync_block.h>
00028 #include <gnuradio/atsc/types.h>
00029 
00030 class atsc_field_sync_mux;
00031 typedef boost::shared_ptr<atsc_field_sync_mux> atsc_field_sync_mux_sptr;
00032 
00033 ATSC_API atsc_field_sync_mux_sptr atsc_make_field_sync_mux();
00034 
00035 /*!
00036  * \brief Insert ATSC Field Syncs as required (atsc_data_segment --> atsc_data_segment)
00037  * \ingroup atsc
00038  *
00039  * input: atsc_data_segment; output: atsc_data_segment
00040  */
00041 class ATSC_API atsc_field_sync_mux : public gr::block
00042 {
00043   friend ATSC_API atsc_field_sync_mux_sptr atsc_make_field_sync_mux();
00044 
00045   atsc_field_sync_mux();
00046 
00047 public:
00048   void forecast (int noutput_items, gr_vector_int &ninput_items_required);
00049   int general_work (int noutput_items,
00050             gr_vector_int &ninput_items,
00051             gr_vector_const_void_star &input_items,
00052             gr_vector_void_star &output_items);
00053 
00054 
00055   static const int      N_SAVED_SYMBOLS = 12;
00056 
00057   void reset()
00058   {
00059     d_already_output_field_sync = false;
00060   }
00061 
00062 protected:
00063   bool                  d_already_output_field_sync;
00064   unsigned char         d_saved_symbols[N_SAVED_SYMBOLS];
00065 };
00066 
00067 
00068 #endif /* INCLUDED_ATSC_FIELD_SYNC_MUX_H */