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https://github.com/g4klx/MMDVM.git
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694b83123a
In to NXDN possible problem on sinc filter anc isinc filter, think they must be recalculated but do not know how to do it. On D-STAR, DMR, C4FM and P25 it work.
70 lines
1.9 KiB
C++
70 lines
1.9 KiB
C++
/*
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* Copyright (C) 2015,2016,2017 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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#if !defined(DMRDMORX_H)
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#define DMRDMORX_H
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#include "Config.h"
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#include "DMRDefines.h"
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const uint16_t DMO_BUFFER_LENGTH_SAMPLES = 2880U; // 60ms at 48 kHz
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enum DMORX_STATE {
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DMORXS_NONE,
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DMORXS_VOICE,
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DMORXS_DATA
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};
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class CDMRDMORX {
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public:
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CDMRDMORX();
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void samples(const q15_t* samples, const uint16_t* rssi, uint8_t length);
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void setColorCode(uint8_t colorCode);
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void reset();
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private:
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uint32_t m_bitBuffer[DMR_RADIO_SYMBOL_LENGTH];
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q15_t m_buffer[DMO_BUFFER_LENGTH_SAMPLES];
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uint16_t m_bitPtr;
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uint16_t m_dataPtr;
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uint16_t m_syncPtr;
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uint16_t m_startPtr;
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uint16_t m_endPtr;
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q31_t m_maxCorr;
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q15_t m_centre[4U];
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q15_t m_threshold[4U];
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uint8_t m_averagePtr;
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uint8_t m_control;
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uint8_t m_syncCount;
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uint8_t m_colorCode;
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DMORX_STATE m_state;
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uint8_t m_n;
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uint8_t m_type;
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uint16_t m_rssi[DMO_BUFFER_LENGTH_SAMPLES];
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bool processSample(q15_t sample, uint16_t rssi);
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void correlateSync(bool first);
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void samplesToBits(uint16_t start, uint8_t count, uint8_t* buffer, uint16_t offset, q15_t centre, q15_t threshold);
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void writeRSSIData(uint8_t* frame);
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};
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#endif
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