private void CL_DeltaEntity(Q3HuffmanReader decoder, CLSnapshot frame, int newnum, EntityState old, bool unchanged)
{
EntityState state;
// save the parsed entity state into the big circular buffer so
// it can be used as the source for a later delta
state = Ext2 <int, EntityState> .GetOrCreate(client.parseEntities,
client.parseEntitiesNum& (Q3Const.MAX_PARSE_ENTITIES - 1));
if (unchanged)
{
state.copy(old);
}
else
{
decoder.readDeltaEntity(state, newnum);
}
if (state.number == (Q3Const.MAX_GENTITIES - 1))
{
return; // entity was delta removed
}
client.parseEntitiesNum++;
frame.numEntities++;
}
private void parseGameState(Q3HuffmanReader reader)
{
reader.readLong();
while (true)
{
byte cmd = reader.readByte();
if (cmd == Q3_SVC.EOF)
{
break;
}
switch (cmd)
{
case Q3_SVC.CONFIGSTRING:
short key = reader.readShort();
if (key < 0 || key > Q3Const.MAX_CONFIGSTRINGS)
{
return;
}
clc.configs[key] = reader.readBigString();
break;
case Q3_SVC.BASELINE:
long newnum = reader.readNumBits(Q3Const.GENTITYNUM_BITS);
if (newnum < 0 || newnum >= Q3Const.MAX_GENTITIES)
{
Q3Utils.PrintDebug(clc.errors, "Baseline number out of range: {0}", newnum);
return;
}
EntityState es = Ext2 <long, EntityState> .GetOrCreate(clc.entityBaselines, newnum);
if (!reader.readDeltaEntity(es, (int)newnum))
{
Q3Utils.PrintDebug(clc.errors, "unable to parse delta-entity state");
return;
}
break;
default:
Q3Utils.PrintDebug(clc.errors, "bad command in parseGameState");
return;
}
}
//clc.clientNum
clc.clientNum = reader.readLong();
//clc.checksumFeed
clc.checksumFeed = reader.readLong();
}
private void parsePacketEntities(Q3HuffmanReader decoder, CLSnapshot oldframe, CLSnapshot newframe)
{
newframe.parseEntitiesNum = client.parseEntitiesNum;
newframe.numEntities = 0;
int newnum = 0;
int oldindex = 0;
int oldnum = 0;
EntityState oldstate = null;
if (oldframe == null)
{
oldnum = 99999;
}
else
{
if (oldindex >= oldframe.numEntities)
{
oldnum = 99999;
}
else
{
oldstate = Ext2 <int, EntityState> .GetOrCreate(client.parseEntities, (oldframe.parseEntitiesNum + oldindex)& (Q3Const.MAX_PARSE_ENTITIES - 1));
oldnum = oldstate.number;
}
}
while (true)
{
newnum = (int)decoder.readNumBits(Q3Const.GENTITYNUM_BITS);
if (newnum == (Q3Const.MAX_GENTITIES - 1))
{
break;
}
if (decoder.isEOD())
{
Q3Utils.PrintDebug(clc.errors, "ERR_DROP, CL_ParsePacketEntities: end of message");
return;
}
while (oldnum < newnum)
{
// one or more entities from the old packet are unchanged
CL_DeltaEntity(decoder, newframe, oldnum, oldstate, true);
oldindex++;
if (oldindex >= oldframe.numEntities)
{
oldnum = 99999;
}
else
{
oldstate = Ext2 <int, EntityState> .GetOrCreate(client.parseEntities,
(oldframe.parseEntitiesNum + oldindex)& (Q3Const.MAX_PARSE_ENTITIES - 1));
oldnum = oldstate.number;
}
}
if (oldnum == newnum)
{
// delta from previous state
CL_DeltaEntity(decoder, newframe, newnum, oldstate, false);
oldindex++;
if (oldindex >= oldframe.numEntities)
{
oldnum = 99999;
}
else
{
oldstate = Ext2 <int, EntityState> .GetOrCreate(client.parseEntities,
(oldframe.parseEntitiesNum + oldindex)& (Q3Const.MAX_PARSE_ENTITIES - 1));
oldnum = oldstate.number;
}
continue;
}
if (oldnum > newnum)
{
// delta from baseline
EntityState es = Ext2 <int, EntityState> .GetOrCreate(client.entityBaselines, newnum);
CL_DeltaEntity(decoder, newframe, newnum, es, false);
continue;
}
}
// any remaining entities in the old frame are copied over
while (oldnum != 99999)
{
// one or more entities from the old packet are unchanged
CL_DeltaEntity(decoder, newframe, oldnum, oldstate, true);
oldindex++;
if (oldindex >= oldframe.numEntities)
{
oldnum = 99999;
}
else
{
oldstate = Ext2 <int, EntityState> .GetOrCreate(client.parseEntities,
(oldframe.parseEntitiesNum + oldindex)& (Q3Const.MAX_PARSE_ENTITIES - 1));
oldnum = oldstate.number;
}
}
}
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, "Delta from invalid frame (not supposed to happen!)");
}
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, "Delta frame too old.");
}
else if ((client.parseEntitiesNum - old.parseEntitiesNum) > (Q3Const.MAX_PARSE_ENTITIES - 128))
{
Q3Utils.PrintDebug(clc.errors, "Delta parseEntitiesNum too old");
}
else
{
newSnap.valid = true; // valid delta parse
}
}
int len = decoder.readByte();
if (len > newSnap.areamask.Length)
{
Q3Utils.PrintDebug(clc.errors, "CL_ParseSnapshot: Invalid size {0} for areamask", len);
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);
}