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dpmr.h
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dpmr.h
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///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2016 Edouard Griffiths, F4EXB. //
// //
// 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 as version 3 of the License, or //
// //
// 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 V3 for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <http://www.gnu.org/licenses/>. //
///////////////////////////////////////////////////////////////////////////////////
#ifndef DPMR_H_
#define DPMR_H_
#include "fec.h"
#include "export.h"
namespace DSDcc
{
class DSDDecoder;
class DSDCC_API DSDdPMR
{
public:
typedef enum
{
DPMRNoFrame, //!< no sync
DPMRExtSearchFrame, //!< no sync - extensive search
DPMRHeaderFrame, //!< header
DPMRPayloadFrame, //!< payload superframe with undetermined type
DPMRVoiceframe, //!< voice superframe (no SLD)
DPMRDataVoiceframe, //!< data and voice superframe (type 2)
DPMRData1frame, //!< data superframe without FEC
DPMRData2frame, //!< data superframe with FEC
DPMREndFrame, //!< end frame
} DPMRFrameType;
typedef enum
{
DPMRCommStartHeader, //!< Communication start header (a superframe follows)
DPMRConnReqHeader, //!< Connection request header (an END frame follows)
DPMRUnConnReqHeader, //!< Unconnect request header (an END frame follows)
DPMRAckHeader, //!< ACK (this a single frame, ACK or NACK is differentiated by the CI bits setting)
DPMRSysReqHeader, //!< System request header (an END frame follows)
DPMRAckReplyHeader, //!< ACK header reply to a system request (a superframe follows)
DPMRSysDelivHeader, //!< System delivery header (a superframe follows)
DPMRStatRespHeader, //!< Status response header (an END frame follows)
DPMRStatReqHeader, //!< Status request header
DPMRReservedHeader, //!< Reserved
DPMRUndefinedHeader //!< Undefined
} DPMRHeaderType;
typedef enum
{
DPMRVoiceMode, //!< Voice communication (no user data in SLD field)
DPMRVoiceSLDMode, //!< Voice + slow data (user data in SLD field)
DPMRData1Mode, //!< Data communication type 1 (Payload is user data without FEC)
DPMRData2Mode, //!< Data communication type 2 (Payload is user data with FEC)
DPMRData3Mode, //!< Data communication type 3 (Packet data, ARQ method)
DPMRVoiceDataMode, //!< Voice and appended data (Type 2)
DPMRReservedMode, //!< Reserved
DPMRUndefinedMode //!< Undefined
} DPMRCommMode;
typedef enum
{
DPMRCallAllFormat, //!< Call ALL (Broadcast)
DPMRP2PFormat, //!< Peer-to-peer communication
DPMRReservedFormat, //!< Reserved
DPMRUndefinedFormat //!< Undefined
} DPMRCommFormat;
explicit DSDdPMR(DSDDecoder *dsdDecoder);
~DSDdPMR();
void init();
void process();
int getColorCode() const { return m_colourCode; }
DPMRFrameType getFrameType() const { return m_frameType; }
unsigned int getCalledId() const { return m_calledId; }
unsigned int getOwnId() const { return m_ownId; }
static char dpmrFrameTypes[9][3];
private:
class LFSRGenerator
{
public:
LFSRGenerator();
~LFSRGenerator();
void init();
unsigned int next();
private:
unsigned int m_sr;
};
typedef enum
{
DPMRHeader, // FS1 sync header frame (sync detected at upper level)
DPMRPostFrame, // frame(s) have been processed and we are looking for a FS2 or FS3 sync
DPMRExtSearch, // FS2 or FS3 extensive search
DPMRSuperFrame, // process superframe
DPMREnd // FS3 sync end frame
} DPMRState;
void processHeader();
void processHIn(int symbolIndex, int dibit);
void processSuperFrame(); // process super frame
void processEndFrame();
void processPostFrame();
void processExtSearch();
void processColourCode(int symbolIndex, int dibit);
void processFS2(int symbolIndex, int dibit);
void processCCH(int symbolIndex, int dibit);
void processTCH(int symbolIndex, int dibit);
void processVoiceFrame(int symbolIndex, int dibit);
void storeSymbolDV(int dibitindex, unsigned char dibit, bool invertDibit = false);
void initScrambling();
void initInterleaveIndexes();
bool checkCRC7(unsigned char *bits, int nbBits);
bool checkCRC8(unsigned char *bits, int nbBits);
DSDDecoder *m_dsdDecoder;
DPMRState m_state;
DPMRFrameType m_frameType;
unsigned char m_syncDoubleBuffer[24]; //!< double buffer for frame sync extensive search
unsigned char m_colourBuffer[12]; //!< buffer for colour code: 12 dibits
int m_syncCycle;
int m_symbolIndex; //!< current symbol index in non HD sequence
unsigned int m_frameIndex; //!< count of frames in superframes with best effort
int m_colourCode; //!< calculated colour code
LFSRGenerator m_scramblingGenerator;
Hamming_12_8 m_hamming;
unsigned char m_scrambleBits[120];
unsigned char m_bitBufferRx[120];
unsigned char m_bitBuffer[80];
unsigned char m_bitWork[80];
unsigned int dI72[72];
unsigned int dI120[120];
DPMRHeaderType m_headerType;
DPMRCommMode m_commMode;
DPMRCommFormat m_commFormat;
unsigned int m_calledId;
unsigned int m_ownId;
unsigned int m_calledIdWork;
unsigned int m_ownIdWork;
bool m_calledIdHalf;
bool m_ownIdHalf;
unsigned char m_frameNumber;
static const int rW[36];
static const int rX[36];
static const int rY[36];
static const int rZ[36];
static const unsigned char m_preamble[12];
const int *w, *x, *y, *z;
};
} // namespace DSDcc
#endif /* DPMR_H_ */