baz_fastrak_decoder.h
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/* -*- c++ -*- */
/*
* Copyright 2004 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.
*/
/*
* gr-baz by Balint Seeber (http://spench.net/contact)
* Information, documentation & samples: http://wiki.spench.net/wiki/gr-baz
*/
#ifndef INCLUDED_BAZ_FASTRAK_DECODER_H
#define INCLUDED_BAZ_FASTRAK_DECODER_H
#include <gnuradio/sync_block.h>
class BAZ_API baz_fastrak_decoder;
/*
* We use boost::shared_ptr's instead of raw pointers for all access
* to gr_blocks (and many other data structures). The shared_ptr gets
* us transparent reference counting, which greatly simplifies storage
* management issues. This is especially helpful in our hybrid
* C++ / Python system.
*
* See http://www.boost.org/libs/smart_ptr/smart_ptr.htm
*
* As a convention, the _sptr suffix indicates a boost::shared_ptr
*/
typedef boost::shared_ptr<baz_fastrak_decoder> baz_fastrak_decoder_sptr;
/*!
* \brief Return a shared_ptr to a new instance of baz_fastrak_decoder.
*
* To avoid accidental use of raw pointers, baz_fastrak_decoder's
* constructor is private. baz_make_fastrak_decoder is the public
* interface for creating new instances.
*/
BAZ_API baz_fastrak_decoder_sptr baz_make_fastrak_decoder (int sample_rate);
/*!
* \brief square2 a stream of floats.
* \ingroup block
*
* This uses the preferred technique: subclassing gr_sync_block.
*/
class BAZ_API baz_fastrak_decoder : public gr::sync_block
{
private:
// The friend declaration allows baz_make_fastrak_decoder to access the private constructor.
friend BAZ_API baz_fastrak_decoder_sptr baz_make_fastrak_decoder (int sample_rate);
baz_fastrak_decoder (int sample_rate); // private constructor
float d_sync_threshold;
int d_sample_rate;
int d_oversampling;
std::string d_last_id_string;
typedef enum state
{
STATE_UNKNOWN,
STATE_SEARCHING,
STATE_SYNC,
STATE_TYPE,
STATE_DECODE,
STATE_CRC,
STATE_DONE
} state_t;
typedef enum packet_type
{
PT_UNKNOWN = 0xFFFF,
PT_ID = 0x0001
} packet_type_t;
packet_type_t d_current_packet_type;
typedef std::map<packet_type_t,int> TypeLengthMap;
TypeLengthMap d_type_length_map;
state_t d_state;
unsigned long long d_bit_buffer;
int d_bit_counter;
int d_sub_symbol_counter;
int d_payload_bit_counter;
unsigned int d_id;
unsigned short d_crc;
unsigned char d_crc_buffer;
int d_total_bit_counter;
bool d_compute_crc;
int d_crc_bit_counter;
unsigned int d_last_id;
unsigned int d_last_id_count;
void enter_state(state_t state);
public:
~baz_fastrak_decoder (); // public destructor
void set_sync_threshold(float threshold);
unsigned int last_id_count(bool reset = false);
//inline std::string last_id() const
//{ return d_last_id_string; }
inline unsigned int last_id() const
{ return d_last_id; }
int work (int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items);
};
#endif /* INCLUDED_BAZ_FASTRAK_DECODER_H */
BAZ_API
#define BAZ_API
Definition api.h:19
baz_make_fastrak_decoder
BAZ_API baz_fastrak_decoder_sptr baz_make_fastrak_decoder(int sample_rate)
Return a shared_ptr to a new instance of baz_fastrak_decoder.
baz_fastrak_decoder
square2 a stream of floats.
Definition baz_fastrak_decoder.h:64
baz_fastrak_decoder::~baz_fastrak_decoder
~baz_fastrak_decoder()
baz_fastrak_decoder::last_id
unsigned int last_id() const
Definition baz_fastrak_decoder.h:116
baz_fastrak_decoder::work
int work(int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
baz_fastrak_decoder::set_sync_threshold
void set_sync_threshold(float threshold)
baz_fastrak_decoder::last_id_count
unsigned int last_id_count(bool reset=false)
baz_fastrak_decoder::baz_make_fastrak_decoder
friend BAZ_API baz_fastrak_decoder_sptr baz_make_fastrak_decoder(int sample_rate)
Return a shared_ptr to a new instance of baz_fastrak_decoder.