2016-05-13 07:34:15 +00:00
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/*
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2016 Furrtek
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __PROC_EPAR_H__
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#define __PROC_EPAR_H__
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#include "baseband_processor.hpp"
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#include "dsp_decimate.hpp"
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#include "dsp_demodulate.hpp"
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#include "audio_output.hpp"
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#include "baseband_processor.hpp"
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// One bit is 0.005119048s (~200bps ?)
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// Time unit is 0.001706349s (586Hz)
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#define EPAR_TU 262-1 // 1536000/10/586
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#define EPAR_SPACE 33-1
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#define EPAR_REPEAT 26*2 // DEBUG
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// 0: 011
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// 1: 001
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// Good: 1001110111111
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// Bad: 1100111011111
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class EPARProcessor : public BasebandProcessor {
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public:
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void execute(const buffer_c8_t& buffer) override;
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private:
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2016-05-15 00:35:08 +00:00
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const int8_t bitdef[2][3] = {
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{-127, 127, 127},
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{-127, -127, 127}
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2016-05-13 07:34:15 +00:00
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};
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int8_t re, im;
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uint8_t s;
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uint8_t state_length = 0;
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uint8_t current_bit = 0;
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uint8_t current_tu = 0;
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uint8_t bit_pos = 0;
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uint8_t repeat_count = 0;
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uint32_t sample_count = 0;
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uint32_t aphase, phase, sphase;
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int32_t sample, frq;
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uint8_t state = 1;
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TXDoneMessage message;
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};
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#endif
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