Merge branch 'smooth-gentleman' into 'master'

Smooth out gentleman delay

See merge request KartKrew/Kart!1256

src/d_clisrv.c

@@ -116,6 +116,9 @@ UINT16 pingmeasurecount = 1;
 UINT32 realpingtable[MAXPLAYERS]; //the base table of ping where an average will be sent to everyone.
 UINT32 playerpingtable[MAXPLAYERS]; //table of player latency values.
 
+#define GENTLEMANSMOOTHING (TICRATE)
+static tic_t reference_lag;
+static UINT8 spike_time; 
 static tic_t lowest_lag;
 boolean server_lagless;
 static CV_PossibleValue_t mindelay_cons_t[] = {{0, "MIN"}, {30, "MAX"}, {0, NULL}};
@@ -5974,6 +5977,30 @@ static void CL_SendClientCmd(void)
 		{
 			// Gentlemens' ping.
 			lagDelay = min(lowest_lag, MAXGENTLEMENDELAY);
+
+			// Is our connection worse than our current gentleman point?
+			// Make sure it stays that way for a bit before increasing delay levels.
+			if (lagDelay > reference_lag)
+			{
+				spike_time++;
+				if (spike_time >= GENTLEMANSMOOTHING)
+				{
+					// Okay, this is genuinely the new baseline delay.
+					reference_lag = lagDelay;
+					spike_time = 0;
+				}
+				else
+				{
+					// Just a temporary fluctuation, ignore it.
+					lagDelay = reference_lag;
+				}
+			}
+			else 
+			{
+				reference_lag = lagDelay; // Adjust quickly if the connection improves.
+				spike_time = 0;
+			}
+
 			if (server) // Clients have to wait for the gamestate to make it back. Servers don't!
 				lagDelay *= 2; // Simulate the HELLFUCK NIGHTMARE of a complete round trip.
 		}