mirror of https://github.com/PentHertz/srsLTE.git
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
/**
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*
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* \section COPYRIGHT
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*
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* Copyright 2013-2015 The srsLTE 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 srsLTE library.
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*
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* srsLTE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero 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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* srsLTE 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 Affero General Public License for more details.
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*
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* A copy of the GNU Affero 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_pdsch_cfg_t cfg;
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srslte_softbuffer_tx_t softbuffer;
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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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cfg.grant.mcs.tbs = mexutils_read_uint8(TRBLKIN, &trblkin);
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if (cfg.grant.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", &cfg.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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cfg.grant.mcs.mod = SRSLTE_MOD_QPSK;
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cfg.grant.Qm = 2;
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} else if (!strcmp(mod_str, "16QAM")) {
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cfg.grant.mcs.mod = SRSLTE_MOD_16QAM;
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cfg.grant.Qm = 4;
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} else if (!strcmp(mod_str, "64QAM")) {
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cfg.grant.mcs.mod = SRSLTE_MOD_64QAM;
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cfg.grant.Qm = 6;
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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_softbuffer_tx_init(&softbuffer, cell.nof_prb)) {
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mexErrMsgTxt("Error initiating DL-SCH soft buffer\n");
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return;
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}
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cfg.nbits.nof_bits = mxGetScalar(OUTLEN);
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uint8_t *e_bits = srslte_vec_malloc(cfg.nbits.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_cbsegm(&cfg.cb_segm, cfg.grant.mcs.tbs)) {
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mexErrMsgTxt("Error computing CB segmentation\n");
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return;
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}
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if (srslte_dlsch_encode(&dlsch, &cfg, &softbuffer, 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], cfg.nbits.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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