void srslte_pdsch_free(srslte_pdsch_t *q) {
for (int i = 0; i < SRSLTE_MAX_CODEWORDS; i++) {
if (q->e[i]) {
free(q->e[i]);
}
if (q->d[i]) {
free(q->d[i]);
}
if (q->csi[i]) {
free(q->csi[i]);
}
}
/* Free sch objects */
srslte_sch_free(&q->dl_sch);
for (int i = 0; i < SRSLTE_MAX_PORTS; i++) {
if (q->x[i]) {
free(q->x[i]);
}
if (q->symbols[i]) {
free(q->symbols[i]);
}
if (q->is_ue) {
for (int j = 0; j < SRSLTE_MAX_PORTS; j++) {
if (q->ce[i][j]) {
free(q->ce[i][j]);
}
}
}
}
if (q->users) {
if (q->is_ue) {
srslte_pdsch_free_rnti(q, 0);
} else {
for (int u=0;u<=SRSLTE_SIRNTI;u++) {
if (q->users[u]) {
srslte_pdsch_free_rnti(q, u);
}
}
}
free(q->users);
}
srslte_sequence_free(&q->tmp_seq);
for (int i = 0; i < 4; i++) {
srslte_modem_table_free(&q->mod[i]);
}
bzero(q, sizeof(srslte_pdsch_t));
}
/* Precalculate the PDSCH scramble sequences for a given RNTI. This function takes a while
* to execute, so shall be called once the final C-RNTI has been allocated for the session.
*/
int srslte_pdsch_set_rnti(srslte_pdsch_t *q, uint16_t rnti) {
uint32_t rnti_idx = q->is_ue?0:rnti;
if (!q->users[rnti_idx] || q->is_ue) {
if (!q->users[rnti_idx]) {
q->users[rnti_idx] = calloc(1, sizeof(srslte_pdsch_user_t));
if(!q->users[rnti_idx]) {
perror("calloc");
return -1;
}
}
for (int i = 0; i < SRSLTE_NSUBFRAMES_X_FRAME; i++) {
for (int j = 0; j < SRSLTE_MAX_CODEWORDS; j++) {
if (srslte_sequence_pdsch(&q->users[rnti_idx]->seq[j][i], rnti, j, 2 * i, q->cell.id,
q->max_re * srslte_mod_bits_x_symbol(SRSLTE_MOD_64QAM)))
{
fprintf(stderr, "Error initializing PDSCH scrambling sequence\n");
srslte_pdsch_free_rnti(q, rnti);
return SRSLTE_ERROR;
}
}
}
q->ue_rnti = rnti;
q->users[rnti_idx]->cell_id = q->cell.id;
q->users[rnti_idx]->sequence_generated = true;
} else {
fprintf(stderr, "Error generating PDSCH sequence: rnti=0x%x already generated\n", rnti);
}
return SRSLTE_SUCCESS;
}
void srslte_enb_dl_rem_rnti(srslte_enb_dl_t* q, uint16_t rnti)
{
srslte_pdsch_free_rnti(&q->pdsch, rnti);
}
