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DMR 12 Rate Data LRRP

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DMR 12 Rate Data LRRP Decoding
This commit is contained in:
lwvmobile
2022-03-24 07:54:09 -04:00
committed by GitHub
parent 94487fd1c0
commit 1ee3dba499
14 changed files with 2073 additions and 89 deletions
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28
include/dsd.h
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@@ -478,6 +478,9 @@ typedef struct
unsigned int nxdn_cipher_type;
unsigned int nxdn_key;
char nxdn_call_type[1024];
char dmr_callsign[4][99]; //plenty of room in case of overflow;
char dmr_lrrp[6][9999];
//borrow from LEH
NxdnSacchRawPart_t NxdnSacchRawPart[4];
NxdnFacch1RawPart_t NxdnFacch1RawPart[2];
@@ -507,6 +510,10 @@ typedef struct
TimeSlotVoiceSuperFrame_t TS1SuperFrame;
TimeSlotVoiceSuperFrame_t TS2SuperFrame;
char dmr_branding[25];
uint8_t dmr_12_rate_sf[36]; //going three frames deep
uint8_t dmr_34_rate_sf[54]; //going three frames deep
//LEH dPMR stuff
dPMRVoiceFS2Frame_t dPMRVoiceFS2Frame;
@@ -776,7 +783,17 @@ uint32_t ComputeAndCorrectFullLinkControlCrc(uint8_t * FullLinkControlDataBytes,
uint8_t ComputeCrc5Bit(uint8_t * DMRData);
uint8_t * DmrAlgIdToStr(uint8_t AlgID);
uint8_t * DmrAlgPrivacyModeToStr(uint32_t PrivacyMode);
void ProcessDmrPIHeader(dsd_opts * opts, dsd_state * state, uint8_t info[196], uint8_t syncdata[48], uint8_t SlotType[20]);
void ProcessCSBK(dsd_opts * opts, dsd_state * state, uint8_t info[196], uint8_t syncdata[48], uint8_t SlotType[20]);
void ProcessDataData(dsd_opts * opts, dsd_state * state, uint8_t info[196], uint8_t syncdata[48], uint8_t SlotType[20]);
void Process1Data(dsd_opts * opts, dsd_state * state, uint8_t info[196], uint8_t syncdata[48], uint8_t SlotType[20]);
void Process12Data(dsd_opts * opts, dsd_state * state, uint8_t info[196], uint8_t syncdata[48], uint8_t SlotType[20]);
void Process34Data(dsd_opts * opts, dsd_state * state, unsigned char tdibits[98], uint8_t syncdata[48], uint8_t SlotType[20]);
void ProcessMBCData(dsd_opts * opts, dsd_state * state, uint8_t info[196], uint8_t syncdata[48], uint8_t SlotType[20]);
void ProcessMBChData(dsd_opts * opts, dsd_state * state, uint8_t info[196], uint8_t syncdata[48], uint8_t SlotType[20]);
void ProcessWTFData(dsd_opts * opts, dsd_state * state, uint8_t info[196], uint8_t syncdata[48], uint8_t SlotType[20]);
void Hamming_7_4_init();
void Hamming_7_4_encode(unsigned char *origBits, unsigned char *encodedBits);
@@ -827,6 +844,17 @@ void open_rtlsdr_stream(dsd_opts *opts);
void cleanup_rtlsdr_stream();
void get_rtlsdr_sample(int16_t *sample);
void rtlsdr_sighandler();
//TRELLIS
void CDMRTrellisTribitsToBits(const unsigned char* tribits, unsigned char* payload);
unsigned int CDMRTrellisCheckCode(const unsigned char* points, unsigned char* tribits);
bool CDMRTrellisFixCode(unsigned char* points, unsigned int failPos, unsigned char* payload);
void CDMRTrellisDeinterleave(const unsigned char* data, signed char* dibits);
void CDMRTrellisDibitsToPoints(const signed char* dibits, unsigned char* points);
void CDMRTrellisPointsToDibits(const unsigned char* points, signed char* dibits);
void CDMRTrellisBitsToTribits(const unsigned char* payload, unsigned char* tribits);
bool CDMRTrellisDecode(const unsigned char* data, unsigned char* payload);
#ifdef __cplusplus
}
#endif

37
include/trellis.h Normal file
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@@ -0,0 +1,37 @@
/*
* Copyright (C) 2016 by Jonathan Naylor, G4KLX
*
* Modifications of original code to work with OP25
* Copyright (C) 2019 by Graham J. Norbury
*
* 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; version 2 of the License.
*
* 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.
*/
#ifndef DMRTrellis_H
#define DMRTrellis_H
class CDMRTrellis {
public:
CDMRTrellis();
~CDMRTrellis();
bool decode(const unsigned char* data, unsigned char* payload);
private:
void deinterleave(const unsigned char* in, signed char* dibits) const;
void dibitsToPoints(const signed char* dibits, unsigned char* points) const;
void pointsToDibits(const unsigned char* points, signed char* dibits) const;
void bitsToTribits(const unsigned char* payload, unsigned char* tribits) const;
void tribitsToBits(const unsigned char* tribits, unsigned char* payload) const;
bool fixCode(unsigned char* points, unsigned int failPos, unsigned char* payload) const;
unsigned int checkCode(const unsigned char* points, unsigned char* tribits) const;
};
#endif