private void parseSnapshot(Q3HuffmanReader decoder)
{
if (client.clientConfig == null)
{
client.clientConfig = new Dictionary <string, string>();
if (clc.configs.ContainsKey(Q3Const.Q3_DEMO_CFG_FIELD_GAME))
{
var gameConfig = Q3Utils.split_config(clc.configs[Q3Const.Q3_DEMO_CFG_FIELD_GAME]);
client.isCheatsOn = Ext.GetOrZero(gameConfig, "sv_cheats") > 0;
}
if (clc.configs.ContainsKey(Q3Const.Q3_DEMO_CFG_FIELD_CLIENT))
{
client.clientConfig = Q3Utils.split_config(clc.configs[Q3Const.Q3_DEMO_CFG_FIELD_CLIENT]);
client.dfvers = Ext.GetOrZero(client.clientConfig, "defrag_vers");
client.mapname = Ext.GetOrNull(client.clientConfig, "mapname");
client.mapNameChecksum = getMapNameChecksum(client.mapname);
client.isOnline = Ext.GetOrZero(client.clientConfig, "defrag_gametype") > 4;
}
}
CLSnapshot newSnap = new CLSnapshot();
CLSnapshot old = null;
newSnap.serverCommandNum = clc.serverCommandSequence;
newSnap.serverTime = decoder.readLong();
newSnap.messageNum = clc.serverMessageSequence;
int deltaNum = decoder.readByte();
if (deltaNum == 0)
{
newSnap.deltaNum = -1;
}
else
{
newSnap.deltaNum = newSnap.messageNum - deltaNum;
}
newSnap.snapFlags = decoder.readByte();
// If the frame is delta compressed from data that we
// no longer have available, we must suck up the rest of
// the frame, but not use it, then ask for a non-compressed
// message
if (newSnap.deltaNum <= 0)
{
newSnap.valid = true; // uncompressed frame
old = null;
clc.demowaiting = false; // we can start recording now
}
else
{
old = Ext2 <int, CLSnapshot> .GetOrCreate(client.snapshots, newSnap.deltaNum& Q3Const.PACKET_MASK);
if (old == null || !old.valid)
{
// should never happen
Q3Utils.PrintDebug(clc.errors, new ErrorDeltaFromInvalidFrame());
}
else if (old.messageNum != newSnap.deltaNum)
{
// The frame that the server did the delta from
// is too old, so we can't reconstruct it properly.
Q3Utils.PrintDebug(clc.errors, new ErrorDeltaFrameTooOld());
}
else if ((client.parseEntitiesNum - old.parseEntitiesNum) > (Q3Const.MAX_PARSE_ENTITIES - 128))
{
Q3Utils.PrintDebug(clc.errors, new ErrorDeltaParseEntitiesNumTooOld());
}
else
{
newSnap.valid = true; // valid delta parse
}
}
int len = decoder.readByte();
if (len > newSnap.areamask.Length)
{
Q3Utils.PrintDebug(clc.errors, new ErrorParseSnapshotInvalidsize());
return;
}
decoder.readData(newSnap.areamask, len);
if (old != null)
{
newSnap.ps.copy(old.ps);
}
decoder.readDeltaPlayerState(newSnap.ps);
parsePacketEntities(decoder, old, newSnap);
// if not valid, dump the entire thing now that it has
// been properly read
if (!newSnap.valid)
{
return;
}
// clear the valid flags of any snapshots between the last
// received and this one, so if there was a dropped packet
// it won't look like something valid to delta from next
// time we wrap around in the buffer
int oldMessageNum = client.snap.messageNum + 1;
if (newSnap.messageNum - oldMessageNum >= Q3Const.PACKET_BACKUP)
{
oldMessageNum = newSnap.messageNum - (Q3Const.PACKET_BACKUP - 1);
}
for (; oldMessageNum < newSnap.messageNum; oldMessageNum++)
{
CLSnapshot s;
if (client.snapshots.TryGetValue(oldMessageNum & Q3Const.PACKET_MASK, out s))
{
if (s != null)
{
s.valid = false;
}
}
}
// copy to the current good spot
client.snap = newSnap;
// skip ping calculations
client.snap.ping = 0;
// save the frame off in the backup array for later delta comparisons
client.snapshots[client.snap.messageNum & Q3Const.PACKET_MASK] = client.snap;
client.newSnapshots = true;
updateClientEvents(newSnap);
}
