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-rw-r--r--gr-pager/lib/flex_sync_impl.h95
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diff --git a/gr-pager/lib/flex_sync_impl.h b/gr-pager/lib/flex_sync_impl.h
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-/* -*- c++ -*- */
-/*
- * Copyright 2006,2012 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_PAGER_FLEX_SYNC_IMPL_H
-#define INCLUDED_PAGER_FLEX_SYNC_IMPL_H
-
-#include <gnuradio/pager/flex_sync.h>
-
-namespace gr {
- namespace pager {
-
- class flex_sync_impl : public flex_sync
- {
- private:
- // State machine transitions
- void enter_idle();
- void enter_syncing();
- void enter_sync1();
- void enter_sync2();
- void enter_data();
-
- int index_avg(int start, int end);
- bool test_sync(unsigned char sym);
- void parse_fiw();
- int output_symbol(unsigned char sym);
-
- // Simple state machine
- enum state_t { ST_IDLE, ST_SYNCING, ST_SYNC1, ST_SYNC2, ST_DATA };
- state_t d_state;
-
- int d_index; // Index into current baud
- int d_start; // Start of good sync
- int d_center; // Center of bit
- int d_end; // End of good sync
- int d_count; // Bit counter
-
- int d_mode; // Current packet mode
- int d_baudrate; // Current decoding baud rate
- int d_levels; // Current decoding levels
- int d_spb; // Current samples per baud
- bool d_hibit; // Alternating bit indicator for 3200 bps
-
- int d_fiw; // Frame information word
- int d_frame; // Current FLEX frame
- int d_cycle; // Current FLEX cycle
- int d_unknown1;
- int d_unknown2;
-
- unsigned char d_bit_a;
- unsigned char d_bit_b;
- unsigned char d_bit_c;
- unsigned char d_bit_d;
-
- unsigned char *d_phase_a;
- unsigned char *d_phase_b;
- unsigned char *d_phase_c;
- unsigned char *d_phase_d;
-
- std::vector<int64_t> d_sync; // Trial synchronizers
-
- public:
- flex_sync_impl();
- ~flex_sync_impl();
-
- void forecast(int noutput_items, gr_vector_int &inputs_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);
- };
-
- } /* namespace pager */
-} /* namespace gr */
-
-#endif /* INCLUDED_PAGER_FLEX_SYNC_IMPL_H */