mirror of https://github.com/g4klx/MMDVM.git
62 lines
1.5 KiB
C++
62 lines
1.5 KiB
C++
/*
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* Copyright (C) 2020 by Jonathan Naylor G4KLX
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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 of the License, or
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* (at your option) 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; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "Config.h"
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#include "Globals.h"
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#include "AX25Demodulator.h"
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const float DELAY = 0.000448F;
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const float SAMPLE_RATE = 24000.0F;
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const uint16_t DELAY_LEN = uint16_t((DELAY / (1.0F / SAMPLE_RATE)) + 0.5F);
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CAX25Demodulator::CAX25Demodulator() :
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m_delayLine(NULL),
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m_delayPos(0U),
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m_nrziState(false)
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{
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m_delayLine = new bool[2U * DELAY_LEN];
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}
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bool CAX25Demodulator::process(const q15_t* samples, uint8_t length, CAX25Frame& frame)
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{
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return false;
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}
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bool CAX25Demodulator::delay(bool b)
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{
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bool r = m_delayLine[m_delayPos];
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m_delayLine[m_delayPos++] = b;
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if (m_delayPos >= DELAY_LEN)
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m_delayPos = 0U;
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return r;
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}
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bool CAX25Demodulator::NRZI(bool b)
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{
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bool result = (b == m_nrziState);
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m_nrziState = b;
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return result;
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}
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