Do not incorporate pacing in RTprop.

prrt/proto/processes/dataTransmitter.c

@@ -78,22 +78,6 @@ static bool send_packet(PrrtSocket *sock_ptr, PrrtPacket *packet) {
     memset(buf, 0, sizeof(buf));
     prrtPacketLength_t length = PrrtPacket_size(packet);
 
-    check(PrrtPacket_encode(buf, MAX_PAYLOAD_LENGTH, packet), "Buffer too small.");
-
-    switch (PrrtPacket_type(packet)) {
-        case PACKET_TYPE_DATA:
-            XlapTimeStampCycle(sock_ptr, ts_data_packet, packet->sequenceNumber, LinkTransmitStart);
-            break;
-        case PACKET_TYPE_REDUNDANCY:
-            XlapTimeStampCycle(sock_ptr, ts_redundancy_packet, packet->sequenceNumber, LinkTransmitStart);
-            break;
-        case PACKET_TYPE_REPETITION:
-        case PACKET_TYPE_FEEDBACK:
-        case PACKET_TYPE_PRESENT_REDUNDANCY:
-        case PACKET_TYPE_CHANNEL_FEEDBACK:
-        default:;
-    }
-
     prrtPacketLength_t payloadLength = packet->payloadLength;
     if (sock_ptr->pacingEnabled && sock_ptr->nextSendTime != 0) {
         debug(DEBUG_DATATRANSMITTER, "About to check for pacing.");
@@ -130,6 +114,26 @@ static bool send_packet(PrrtSocket *sock_ptr, PrrtPacket *packet) {
             sock_ptr->nextSendTime = now + pacingTime;
         }
     }
+    // Update timestamp
+    if(PrrtPacket_type(packet) == PACKET_TYPE_DATA) {
+        ((PrrtPacketDataPayload*) (packet->payload))->timestamp = PrrtClock_get_current_time_us();
+    }
+
+    check(PrrtPacket_encode(buf, MAX_PAYLOAD_LENGTH, packet), "Buffer too small.");
+
+    switch (PrrtPacket_type(packet)) {
+        case PACKET_TYPE_DATA:
+            XlapTimeStampCycle(sock_ptr, ts_data_packet, packet->sequenceNumber, LinkTransmitStart);
+            break;
+        case PACKET_TYPE_REDUNDANCY:
+            XlapTimeStampCycle(sock_ptr, ts_redundancy_packet, packet->sequenceNumber, LinkTransmitStart);
+            break;
+        case PACKET_TYPE_REPETITION:
+        case PACKET_TYPE_FEEDBACK:
+        case PACKET_TYPE_PRESENT_REDUNDANCY:
+        case PACKET_TYPE_CHANNEL_FEEDBACK:
+        default:;
+    }
 
     struct timespec timestamp;
     uint64_t cyclestamp;