change returned value of UE_dl_preprocessing() in case no sampleShift change from 0 to INT_MAX

This now allows to indicate "there was a new sampleShift calculation, and the actual value is 0"
additionally to "there was no new sampleShift calculation".

executables/nr-ue.c

@@ -597,7 +597,7 @@ void processSlotTX(void *arg)
 
 static int UE_dl_preprocessing(PHY_VARS_NR_UE *UE, const UE_nr_rxtx_proc_t *proc, int *tx_wait_for_dlsch, nr_phy_data_t *phy_data)
 {
-  int sampleShift = 0;
+  int sampleShift = INT_MAX;
   NR_DL_FRAME_PARMS *fp = &UE->frame_parms;
   if (UE->sl_mode == 2)
     fp = &UE->SL_UE_PHY_PARAMS.sl_frame_params;
@@ -991,10 +991,7 @@ void *UE_thread(void *arg)
     nr_rxtx_thread_data_t *curMsgRx = (nr_rxtx_thread_data_t *)NotifiedFifoData(newRx);
     *curMsgRx = (nr_rxtx_thread_data_t){.proc = curMsg.proc, .UE = UE};
     int ret = UE_dl_preprocessing(UE, &curMsgRx->proc, tx_wait_for_dlsch, &curMsgRx->phy_data);
-    if (ret)
-      // if ret is 0, no rx_offset has been computed,
-      // or the computed value is 0 = no offset to do
-      // we store it to apply the drift compensation at beginning of next frame
+    if (ret != INT_MAX)
       shiftForNextFrame = ret;
     pushTpool(&(get_nrUE_params()->Tpool), newRx);
 

openair1/SCHED_NR_UE/phy_procedures_nr_ue.c

@@ -877,7 +877,7 @@ int pbch_pdcch_processing(PHY_VARS_NR_UE *ue, const UE_nr_rxtx_proc_t *proc, nr_
   fapi_nr_config_request_t *cfg = &ue->nrUE_config;
   NR_DL_FRAME_PARMS *fp = &ue->frame_parms;
   NR_UE_PDCCH_CONFIG *phy_pdcch_config = &phy_data->phy_pdcch_config;
-  int sampleShift = 0;
+  int sampleShift = INT_MAX;
   nr_ue_dlsch_init(phy_data->dlsch, NR_MAX_NB_LAYERS>4 ? 2:1, ue->max_ldpc_iterations);
   
   VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_UE_RX, VCD_FUNCTION_IN);

openair1/SCHED_NR_UE/phy_procedures_nr_ue_sl.c

@@ -168,7 +168,7 @@ int psbch_pscch_processing(PHY_VARS_NR_UE *ue, const UE_nr_rxtx_proc_t *proc, nr
   int nr_slot_rx = proc->nr_slot_rx;
   sl_nr_ue_phy_params_t *sl_phy_params = &ue->SL_UE_PHY_PARAMS;
   NR_DL_FRAME_PARMS *fp = &sl_phy_params->sl_frame_params;
-  int sampleShift = 0;
+  int sampleShift = INT_MAX;
 
   // VCD_SIGNAL_DUMPER_DUMP_FUNCTION_BY_NAME(VCD_SIGNAL_DUMPER_FUNCTIONS_PHY_PROCEDURES_UE_RX_SL, VCD_FUNCTION_IN);
   start_meas(&sl_phy_params->phy_proc_sl_rx);