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DMRDMORX.h
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DMRDMORX.h
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/*
* Copyright (C) 2015,2016,2017 by Jonathan Naylor G4KLX
*
* 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 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#if !defined(DMRDMORX_H)
#define DMRDMORX_H
#include "Config.h"
#include "DMRDefines.h"
const uint16_t DMO_BUFFER_LENGTH_SAMPLES = 1440U; // 60ms at 24 kHz
enum DMORX_STATE {
DMORXS_NONE,
DMORXS_VOICE,
DMORXS_DATA
};
class CDMRDMORX {
public:
CDMRDMORX();
void samples(const q15_t* samples, const uint16_t* rssi, uint8_t length);
void setColorCode(uint8_t colorCode);
void reset();
private:
uint32_t m_bitBuffer[DMR_RADIO_SYMBOL_LENGTH];
q15_t m_buffer[DMO_BUFFER_LENGTH_SAMPLES];
uint16_t m_bitPtr;
uint16_t m_dataPtr;
uint16_t m_syncPtr;
uint16_t m_startPtr;
uint16_t m_endPtr;
q31_t m_maxCorr;
q15_t m_centre[4U];
q15_t m_threshold[4U];
uint8_t m_averagePtr;
uint8_t m_control;
uint8_t m_syncCount;
uint8_t m_colorCode;
DMORX_STATE m_state;
uint8_t m_n;
uint8_t m_type;
uint16_t m_rssi[DMO_BUFFER_LENGTH_SAMPLES];
bool processSample(q15_t sample, uint16_t rssi);
void correlateSync(bool first);
void samplesToBits(uint16_t start, uint8_t count, uint8_t* buffer, uint16_t offset, q15_t centre, q15_t threshold);
void writeRSSIData(uint8_t* frame);
};
#endif