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125 lines
3.0 KiB
C
125 lines
3.0 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2014 The libLTE Developers. See the
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* COPYRIGHT file at the top-level directory of this distribution.
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*
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* \section LICENSE
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*
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* This file is part of the libLTE library.
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*
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* libLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version.
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*
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* libLTE 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 Lesser General Public License for more details.
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*
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* A copy of the GNU Lesser General Public License can be found in
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* the LICENSE file in the top-level directory of this distribution
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* and at http://www.gnu.org/licenses/.
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*
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*/
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#include <string.h>
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#include "srslte/srslte.h"
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#include "srslte/mex/mexutils.h"
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#define UECFG prhs[0]
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#define PUSCHCFG prhs[1]
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#define OUTLEN prhs[2]
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#define TRBLKIN prhs[3]
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#define NOF_INPUTS 4
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void help()
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{
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mexErrMsgTxt
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("[cwout] = srslte_dlsch_encode(ue, chs, outlen, trblkin)\n\n");
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}
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/* the gateway function */
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void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
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{
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srslte_sch_t dlsch;
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uint8_t *trblkin;
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srslte_ra_mcs_t mcs;
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srslte_ra_dl_alloc_t prb_alloc;
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srslte_harq_t harq_process;
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uint32_t rv;
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if (nrhs < NOF_INPUTS) {
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help();
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return;
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}
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if (srslte_sch_init(&dlsch)) {
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mexErrMsgTxt("Error initiating DL-SCH\n");
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return;
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}
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srslte_cell_t cell;
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cell.nof_prb = 100;
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cell.id=1;
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if (srslte_harq_init(&harq_process, cell)) {
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mexErrMsgTxt("Error initiating HARQ\n");
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return;
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}
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mcs.tbs = mexutils_read_uint8(TRBLKIN, &trblkin);
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if (mcs.tbs == 0) {
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mexErrMsgTxt("Error trblklen is zero\n");
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return;
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}
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if (mexutils_read_uint32_struct(PUSCHCFG, "RV", &rv)) {
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mexErrMsgTxt("Field RV not found in dlsch config\n");
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return;
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}
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char *mod_str = mexutils_get_char_struct(PUSCHCFG, "Modulation");
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if (!strcmp(mod_str, "QPSK")) {
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mcs.mod = SRSLTE_MOD_QPSK;
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} else if (!strcmp(mod_str, "16QAM")) {
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mcs.mod = SRSLTE_MOD_16QAM;
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} else if (!strcmp(mod_str, "64QAM")) {
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mcs.mod = SRSLTE_MOD_64QAM;
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} else {
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mexErrMsgTxt("Unknown modulation\n");
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return;
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}
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mxFree(mod_str);
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if (srslte_harq_setup_dl(&harq_process, mcs, rv, 0, &prb_alloc)) {
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mexErrMsgTxt("Error configuring HARQ process\n");
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return;
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}
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harq_process.nof_bits = mxGetScalar(OUTLEN);
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uint8_t *e_bits = srslte_vec_malloc(harq_process.nof_bits* sizeof(uint8_t));
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if (!e_bits) {
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return;
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}
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if (srslte_dlsch_encode(&dlsch, &harq_process, trblkin, e_bits)) {
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mexErrMsgTxt("Error encoding TB\n");
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return;
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}
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if (nlhs >= 1) {
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mexutils_write_uint8(e_bits, &plhs[0], harq_process.nof_bits, 1);
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}
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srslte_sch_free(&dlsch);
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free(trblkin);
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free(e_bits);
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return;
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}
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