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66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
// qra64_subs.c
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// Fortran interface routines for QRA64
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#include "qra64.h"
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#include <stdio.h>
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static qra64codec *pqra64codec = NULL;
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void qra64_enc_(int x[], int y[])
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{
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if (pqra64codec==NULL) pqra64codec = qra64_init(QRA_USERAP);
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qra64_encode(pqra64codec, y, x);
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}
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void qra64_dec_(float r[], int* nc1, int* nc2, int* ng2, int* APtype,
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int* iset, int* ns0, float* b0, int* nf0,
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int xdec[], float* snr, int* rc)
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{
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/*
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APtype: AP
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-----------------------------------------------------------------------
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-1 0 (no AP information)
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0 [CQ/QRZ ? ? ] 25/37
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1 [MyCall ? ? ] 25/37
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2 [ ? HisCall ? ] 25/37
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3 [MyCall HisCall ? ] 49/68
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4 [MyCall HisCall grid] 68
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5 [CQ/QRZ HisCall ? ] 49/68
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rc Message format AP APTYPE Comments
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------------------------------------------------------------------------
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-16 Failed sanity check
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-2 Decoded but CRC failed
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-1 No decode
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0 [ ? ? ? ] 0 -1 Decode with no AP info
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1 [CQ/QRZ ? ? ] 25 0
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2 [CQ/QRZ ? _ ] 37 0
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3 [MyCall ? ? ] 25 1
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4 [MyCall ? _ ] 37 1
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5 [MyCall HisCall ? ] 49 3
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6 [ ? HisCall ? ] 25 2 Optional
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7 [ ? HisCall _ ] 37 2 Optional
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8 [MyCall HisCall Grid] 68 4
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9 [CQ/QRZ HisCall ? ] 49 5 Optional (not needed?)
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10 [CQ/QRZ HisCall _ ] 68 5 Optional
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11 [CQ/QRZ HisCall Grid] 68 ? Optional
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*/
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float EbNodBEstimated;
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int err=0;
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int nSubmode=*ns0;
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float b90=*b0;
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int nFadingModel=*nf0;
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if(pqra64codec==NULL) pqra64codec = qra64_init(QRA_USERAP);
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err=qra64_apset(pqra64codec,*nc1,*nc2,*ng2,*APtype);
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if(err<0) printf("ERROR: qra64_apset returned %d\n",err);
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if(*iset==0) {
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*rc = qra64_decode_fastfading(pqra64codec,&EbNodBEstimated,xdec,r,
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nSubmode,b90,nFadingModel);
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*snr = EbNodBEstimated - 31.0;
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}
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}
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