portapack-mayhem/firmware/baseband/proc_ook.hpp

/*
 * Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
 * Copyright (C) 2016 Furrtek
 *
 * This file is part of PortaPack.
 *
 * 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 2, 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; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */

#ifndef __PROC_OOK_H__
#define __PROC_OOK_H__

#include "baseband_processor.hpp"
#include "baseband_thread.hpp"

class OOKProcessor : public BasebandProcessor {
public:
	void execute(const buffer_c8_t& buffer) override;

	void on_message(const Message* const p) override;

private:
	bool configured = false;

	BasebandThread baseband_thread { 2280000, this, NORMALPRIO + 20, baseband::Direction::Transmit };

	uint32_t samples_per_bit { 0 };
	uint8_t repeat { 0 };
	uint32_t length { 0 };
	uint32_t pause { 0 };
	uint8_t de_bruijn_length { 0 };

	uint32_t pause_counter { 0 };
	uint8_t repeat_counter { 0 };
	uint8_t s { 0 };
	uint16_t bit_pos { 0 };
	uint8_t cur_bit { 0 };
	uint32_t sample_count { 0 };
	uint32_t tone_phase { 0 }, phase { 0 }, sphase { 0 };
	int32_t tone_sample { 0 }, sig { 0 }, frq { 0 };

	TXProgressMessage txprogress_message { };

	static constexpr auto MAX_DE_BRUIJN_ORDER = 24;
	uint8_t v[MAX_DE_BRUIJN_ORDER];
	uint8_t v_tmp[MAX_DE_BRUIJN_ORDER];
	unsigned int idx { 0 };
	unsigned int k { 0 };
	unsigned int duval_symbols { 0 };
	unsigned int duval_length { 0 };
	unsigned int duval_bit { 0 };
	unsigned int duval_sample_bit { 0 };
	unsigned int duval_symbol { 0 };
	size_t scan_progress{ 0 };
	uint8_t scan_done { true };

	size_t duval_algo_step();
	void scan_process(const buffer_c8_t& buffer);
	bool scan_init(unsigned int order);
	bool scan_encode(const buffer_c8_t& buffer, size_t& buf_ptr);
	void write_sample(const buffer_c8_t& buffer, uint8_t bit_value, size_t i);
};

#endif