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/* SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only */
/* Copyright (c) 2022 Brett Sheffield <bacs@librecast.net> */
/* params - example program to create RaptorQ context and print derived parameters */
#include <lcrq.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
int usage(const char *progname, int rc)
{
fprintf(stderr, "usage: `%s F T` (F = object size, T = symbol size)\n", progname);
return rc;
}
int main(int argc, char *argv[])
{
rq_t *rq;
uint64_t F;
uint16_t T, K, KP, N, Z;
uint8_t Al;
if (argc != 3) return usage(argv[0], EXIT_FAILURE);
F = atoll(argv[1]);
T = atoll(argv[2]);
/* initialize RaptorQ context */
rq = rq_init(F, T);
/* Query parameters */
K = rq_K(rq);
KP = rq_KP(rq);
N = rq_N(rq);
Z = rq_Z(rq);
Al = rq_Al(rq);
/* free RaptorQ context */
rq_free(rq);
printf("F %12" PRIu64 "\tsize of object to encode (40 bits)\n", F);
printf("T %12u\tsymbol (payload) size\n", T);
printf("K %12u\tnumber of original symbols\n", K);
printf("K' %12u\tnumber of symbols, including padding symbols\n", KP);
printf("N %12u\tnumber of sub-blocks\n", N);
printf("Z %12u\tnumber of blocks\n", Z);
printf("Al %12u\talignment\n", Al);
return 0;
}
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