Radio: add individual Rx gain and integrate in srsue

Fix compilation

Fix compilation

Add missing variable. Wasn't compiling

Radio: revert some changes

lib/include/srslte/common/interfaces_common.h

@@ -47,6 +47,7 @@ typedef struct {
   float       ul_freq;
   float       freq_offset;
   float       rx_gain;
+  float       rx_gain_ch[SRSLTE_MAX_CARRIERS];
   float       tx_gain;
   float       tx_gain_ch[SRSLTE_MAX_CARRIERS];
   float       tx_max_power;

lib/src/radio/radio.cc

@@ -198,6 +198,26 @@ int radio::init(const rf_args_t& args, phy_interface_radio* phy_)
     }
   }
 
+  // Set individual gains
+  for (uint32_t i = 0; i < args.nof_carriers; i++) {
+    if (args.rx_gain_ch[i] > 0) {
+      for (uint32_t j = 0; j < nof_antennas; j++) {
+        uint32_t phys_antenna_idx = i * nof_antennas + j;
+
+        // From channel number deduce RF device index and channel
+        uint32_t rf_device_idx  = phys_antenna_idx / nof_channels_x_dev;
+        uint32_t rf_channel_idx = phys_antenna_idx % nof_channels_x_dev;
+
+        log_h->info(
+            "Setting individual rx_gain=%.1f on dev=%d ch=%d\n", args.rx_gain_ch[i], rf_device_idx, rf_channel_idx);
+        if (srslte_rf_set_rx_gain_ch(&rf_devices[rf_device_idx], rf_channel_idx, args.rx_gain_ch[i]) < 0) {
+          log_h->error(
+              "Setting channel rx_gain=%.1f on dev=%d ch=%d\n", args.rx_gain_ch[i], rf_device_idx, rf_channel_idx);
+        }
+      }
+    }
+  }
+
   // Set resampler buffers to 5 ms
   if (std::isnormal(fix_srate_hz)) {
     for (auto& buf : rx_buffer) {

srsue/src/main.cc

@@ -87,6 +87,11 @@ static int parse_args(all_args_t* args, int argc, char* argv[])
     ("rf.tx_gain[2]",   bpo::value<float>(&args->rf.tx_gain_ch[2])->default_value(-1),   "Front-end transmitter gain CH2")
     ("rf.tx_gain[3]",   bpo::value<float>(&args->rf.tx_gain_ch[3])->default_value(-1),   "Front-end transmitter gain CH3")
     ("rf.tx_gain[4]",   bpo::value<float>(&args->rf.tx_gain_ch[4])->default_value(-1),   "Front-end transmitter gain CH4")
+    ("rf.rx_gain[0]",   bpo::value<float>(&args->rf.rx_gain_ch[0])->default_value(-1),   "Front-end receiver gain CH0")
+    ("rf.rx_gain[1]",   bpo::value<float>(&args->rf.rx_gain_ch[1])->default_value(-1),   "Front-end receiver gain CH1")
+    ("rf.rx_gain[2]",   bpo::value<float>(&args->rf.rx_gain_ch[2])->default_value(-1),   "Front-end receiver gain CH2")
+    ("rf.rx_gain[3]",   bpo::value<float>(&args->rf.rx_gain_ch[3])->default_value(-1),   "Front-end receiver gain CH3")
+    ("rf.rx_gain[4]",   bpo::value<float>(&args->rf.rx_gain_ch[4])->default_value(-1),   "Front-end receiver gain CH4")
     ("rf.nof_carriers", bpo::value<uint32_t>(&args->rf.nof_carriers)->default_value(1),  "Number of carriers")
     ("rf.nof_antennas", bpo::value<uint32_t>(&args->rf.nof_antennas)->default_value(1),  "Number of antennas per carrier")