encoder_impl.h

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/*
 * Copyright (C) 2014 Bastian Bloessl <bloessl@ccs-labs.org>
 *
 * This program 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 of the License, or
 * (at your option) any later version.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef INCLUDED_RDS_ENCODER_IMPL_H
#define INCLUDED_RDS_ENCODER_IMPL_H
 
#include <rds/encoder.h>
#include <gnuradio/thread/thread.h>
 
namespace gr {
namespace rds {
 
class encoder_impl : public encoder
{
public:
        encoder_impl(unsigned char pty_locale, int pty, bool ms, std::string ps,
                 double af1, bool tp, bool ta, int pi_country_code,
                 int pi_coverage_area, int pi_reference_number,
                 std::string radiotext, int max_latency);
 
    virtual void set_ps(std::string ps);
 
private:
        ~encoder_impl();
 
        int work(int noutput_items,
                        gr_vector_const_void_star &input_items,
                        gr_vector_void_star &output_items);
 
        unsigned int  infoword[4];
        unsigned int  checkword[4];
        unsigned int  block[4];
        unsigned char **buffer;
        unsigned char pty_locale;
 
        // FIXME make this a struct (or a class)
        unsigned char PTY;
        unsigned char radiotext[64];
        unsigned char PS[8];
        bool TA;
        bool TP;
        bool MS;
        unsigned int PI;
        double AF1;
 
        int DP;
        int extent;
        int event;
        int location;
        gr::thread::mutex d_mutex;
 
/* each type 0 group contains 2 out of 8 PS characters;
 * this is used to count 0..3 and send all PS characters */
        int d_g0_counter;
/* each type 2A group contains 4 out of 64 RadioText characters;
 * each type 2B group contains 2 out of 32 RadioText characters;
 * this is used to count 0..15 and send all RadioText characters */
        int d_g2_counter;
        int d_g3_counter;
/* points to the current buffer being prepared/streamed
 * used in create_group() and in work() */
        int d_current_buffer;
/* loops through the buffer, pushing out the symbols */
        int d_buffer_bit_counter;
        int groups[32];
/* nbuffers might be != ngroups, e.g. group 0A needs 4 buffers */
        int nbuffers;
 
        int d_max_latency;
        int d_tokens;
        void add_token(pmt::pmt_t tag);
        tag_t d_tag;
 
// Functions
        void rebuild();
        void set_ms(bool ms);
        void set_tp(bool tp);
        void set_ta(bool ta);
        void set_af1(double af1);
        void set_pty(unsigned int pty);
        void set_pi(unsigned int pty);
        void set_radiotext(std::string text);
 
        void count_groups();
        void create_group(const int, const bool);
        void prepare_group0(const bool);
        void prepare_group1a();
        void prepare_group2(const bool);
        void prepare_group3a();
        void prepare_group4a();
        void prepare_group8a();
        void prepare_group11a();
        void prepare_buffer(int);
        unsigned int encode_af(double);
        unsigned int calc_syndrome(unsigned long, unsigned char);
        void rds_in(pmt::pmt_t msg);
};
 
} /* namespace rds */
} /* namespace gr */
 
#endif /* INCLUDED_RDS_ENCODER_IMPL_H */