Clean up channel class

lib/src/phy/channel/channel.cc

@@ -156,14 +156,28 @@ void channel::run(cf_t*                     in[SRSLTE_MAX_CHANNELS],
                   uint32_t                  len,
                   const srslte_timestamp_t& t)
 {
-  // check input pointers
+  // Early return if pointers are not enabled
-  if (in != nullptr && out != nullptr) {
+  if (in == nullptr || out == nullptr) {
-    if (current_srate) {
+    return;
+  }
+
+  // For each channel
   for (uint32_t i = 0; i < nof_channels; i++) {
-        // Check buffers are not null
+    // Skip iteration if any buffer is null
-        if (in[i] != nullptr && out[i] != nullptr) {
+    if (in[i] == nullptr || out[i] == nullptr) {
+      continue;
+    }
+
+    // If sampling rate is not set, copy input and skip rest of channel
+    if (current_srate == 0) {
+      if (in[i] != out[i]) {
+        srslte_vec_cf_copy(out[i], in[i], len);
+      }
+      continue;
+    }
+
     // Copy input buffer
-          memcpy(buffer_in, in[i], sizeof(cf_t) * len);
+    srslte_vec_cf_copy(buffer_in, in[i], len);
 
     if (hst) {
       srslte_channel_hst_execute(hst, buffer_in, buffer_out, len, &t);
@@ -172,27 +186,26 @@ void channel::run(cf_t*                     in[SRSLTE_MAX_CHANNELS],
 
     if (awgn) {
       srslte_channel_awgn_run_c(awgn, buffer_in, buffer_out, len);
-            memcpy(buffer_in, buffer_out, sizeof(cf_t) * len);
+      srslte_vec_cf_copy(buffer_in, buffer_out, len);
     }
 
     if (fading[i]) {
       srslte_channel_fading_execute(fading[i], buffer_in, buffer_out, len, t.full_secs + t.frac_secs);
-            memcpy(buffer_in, buffer_out, sizeof(cf_t) * len);
+      srslte_vec_cf_copy(buffer_in, buffer_out, len);
     }
 
     if (delay[i]) {
       srslte_channel_delay_execute(delay[i], buffer_in, buffer_out, len, &t);
-            memcpy(buffer_in, buffer_out, sizeof(cf_t) * len);
+      srslte_vec_cf_copy(buffer_in, buffer_out, len);
     }
 
     if (rlf) {
       srslte_channel_rlf_execute(rlf, buffer_in, buffer_out, len, &t);
-            memcpy(buffer_in, buffer_out, sizeof(cf_t) * len);
+      srslte_vec_cf_copy(buffer_in, buffer_out, len);
     }
 
     // Copy output buffer
-          memcpy(out[i], buffer_in, sizeof(cf_t) * len);
+    srslte_vec_cf_copy(out[i], buffer_in, len);
-        }
   }
 
   if (hst) {
@@ -226,16 +239,6 @@ void channel::run(cf_t*                     in[SRSLTE_MAX_CHANNELS],
 
     log_h->debug("%s\n", str.str().c_str());
   }
-
-    } else {
-      for (uint32_t i = 0; i < nof_channels; i++) {
-        // Check buffers are not null
-        if (in[i] != nullptr && out[i] != nullptr && in[i] != out[i]) {
-          memcpy(out[i], in[i], sizeof(cf_t) * len);
-        }
-      }
-    }
-  }
 }
 
 void channel::set_srate(uint32_t srate)