Rework cl_video to use dyntextures.
[divverent/darkplaces.git] / host.c
1 /*
2 Copyright (C) 1996-1997 Id Software, Inc.
3
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12
13 See the GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
18
19 */
20 // host.c -- coordinates spawning and killing of local servers
21
22 #include "quakedef.h"
23
24 #include <time.h>
25 #include "libcurl.h"
26 #include "cdaudio.h"
27 #include "cl_gecko.h"
28 #include "cl_video.h"
29 #include "progsvm.h"
30 #include "csprogs.h"
31 #include "sv_demo.h"
32
33 /*
34
35 A server can always be started, even if the system started out as a client
36 to a remote system.
37
38 A client can NOT be started if the system started as a dedicated server.
39
40 Memory is cleared / released when a server or client begins, not when they end.
41
42 */
43
44 // how many frames have occurred
45 // (checked by Host_Error and Host_SaveConfig_f)
46 int host_framecount = 0;
47 // LordHavoc: set when quit is executed
48 qboolean host_shuttingdown = false;
49
50 // the real time since application started, without any slowmo or clamping
51 double realtime;
52
53 // current client
54 client_t *host_client;
55
56 jmp_buf host_abortframe;
57
58 // pretend frames take this amount of time (in seconds), 0 = realtime
59 cvar_t host_framerate = {0, "host_framerate","0", "locks frame timing to this value in seconds, 0.05 is 20fps for example, note that this can easily run too fast, use cl_maxfps if you want to limit your framerate instead, or sys_ticrate to limit server speed"};
60 // shows time used by certain subsystems
61 cvar_t host_speeds = {0, "host_speeds","0", "reports how much time is used in server/graphics/sound"};
62 // LordHavoc: framerate upper cap
63 cvar_t cl_maxfps = {CVAR_SAVE, "cl_maxfps", "1000", "maximum fps cap, if game is running faster than this it will wait before running another frame (useful to make cpu time available to other programs)"};
64 cvar_t cl_maxidlefps = {CVAR_SAVE, "cl_maxidlefps", "20", "maximum fps cap when the game is not the active window (makes cpu time available to other programs"};
65
66 cvar_t developer = {0, "developer","0", "prints additional debugging messages and information (recommended for modders and level designers)"};
67 cvar_t developer_entityparsing = {0, "developer_entityparsing", "0", "prints detailed network entities information each time a packet is received"};
68
69 cvar_t timestamps = {CVAR_SAVE, "timestamps", "0", "prints timestamps on console messages"};
70 cvar_t timeformat = {CVAR_SAVE, "timeformat", "[%Y-%m-%d %H:%M:%S] ", "time format to use on timestamped console messages"};
71
72 /*
73 ================
74 Host_AbortCurrentFrame
75
76 aborts the current host frame and goes on with the next one
77 ================
78 */
79 void Host_AbortCurrentFrame(void)
80 {
81         longjmp (host_abortframe, 1);
82 }
83
84 /*
85 ================
86 Host_Error
87
88 This shuts down both the client and server
89 ================
90 */
91 void Host_Error (const char *error, ...)
92 {
93         static char hosterrorstring1[MAX_INPUTLINE];
94         static char hosterrorstring2[MAX_INPUTLINE];
95         static qboolean hosterror = false;
96         va_list argptr;
97
98         // turn off rcon redirect if it was active when the crash occurred
99         rcon_redirect = false;
100
101         va_start (argptr,error);
102         dpvsnprintf (hosterrorstring1,sizeof(hosterrorstring1),error,argptr);
103         va_end (argptr);
104
105         Con_Printf("Host_Error: %s\n", hosterrorstring1);
106
107         // LordHavoc: if crashing very early, or currently shutting down, do
108         // Sys_Error instead
109         if (host_framecount < 3 || host_shuttingdown)
110                 Sys_Error ("Host_Error: %s", hosterrorstring1);
111
112         if (hosterror)
113                 Sys_Error ("Host_Error: recursively entered (original error was: %s    new error is: %s)", hosterrorstring2, hosterrorstring1);
114         hosterror = true;
115
116         strlcpy(hosterrorstring2, hosterrorstring1, sizeof(hosterrorstring2));
117
118         CL_Parse_DumpPacket();
119
120         CL_Parse_ErrorCleanUp();
121
122         //PR_Crash();
123
124         // print out where the crash happened, if it was caused by QC (and do a cleanup)
125         PRVM_Crash();
126
127
128         Host_ShutdownServer ();
129
130         if (cls.state == ca_dedicated)
131                 Sys_Error ("Host_Error: %s",hosterrorstring2);  // dedicated servers exit
132
133         CL_Disconnect ();
134         cls.demonum = -1;
135
136         hosterror = false;
137
138         Host_AbortCurrentFrame();
139 }
140
141 void Host_ServerOptions (void)
142 {
143         int i;
144
145         // general default
146         svs.maxclients = 8;
147
148 // COMMANDLINEOPTION: Server: -dedicated [playerlimit] starts a dedicated server (with a command console), default playerlimit is 8
149 // COMMANDLINEOPTION: Server: -listen [playerlimit] starts a multiplayer server with graphical client, like singleplayer but other players can connect, default playerlimit is 8
150         // if no client is in the executable or -dedicated is specified on
151         // commandline, start a dedicated server
152         i = COM_CheckParm ("-dedicated");
153         if (i || !cl_available)
154         {
155                 cls.state = ca_dedicated;
156                 // check for -dedicated specifying how many players
157                 if (i && i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
158                         svs.maxclients = atoi (com_argv[i+1]);
159                 if (COM_CheckParm ("-listen"))
160                         Con_Printf ("Only one of -dedicated or -listen can be specified\n");
161                 // default sv_public on for dedicated servers (often hosted by serious administrators), off for listen servers (often hosted by clueless users)
162                 Cvar_SetValue("sv_public", 1);
163         }
164         else if (cl_available)
165         {
166                 // client exists and not dedicated, check if -listen is specified
167                 cls.state = ca_disconnected;
168                 i = COM_CheckParm ("-listen");
169                 if (i)
170                 {
171                         // default players unless specified
172                         if (i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
173                                 svs.maxclients = atoi (com_argv[i+1]);
174                 }
175                 else
176                 {
177                         // default players in some games, singleplayer in most
178                         if (gamemode != GAME_GOODVSBAD2 && gamemode != GAME_NEXUIZ && gamemode != GAME_BATTLEMECH)
179                                 svs.maxclients = 1;
180                 }
181         }
182
183         svs.maxclients = bound(1, svs.maxclients, MAX_SCOREBOARD);
184
185         svs.clients = (client_t *)Mem_Alloc(sv_mempool, sizeof(client_t) * svs.maxclients);
186
187         if (svs.maxclients > 1 && !deathmatch.integer && !coop.integer)
188                 Cvar_SetValueQuick(&deathmatch, 1);
189 }
190
191 /*
192 =======================
193 Host_InitLocal
194 ======================
195 */
196 void Host_SaveConfig_f(void);
197 void Host_LoadConfig_f(void);
198 static void Host_InitLocal (void)
199 {
200         Cmd_AddCommand("saveconfig", Host_SaveConfig_f, "save settings to config.cfg immediately (also automatic when quitting)");
201         Cmd_AddCommand("loadconfig", Host_LoadConfig_f, "reset everything and reload configs");
202
203         Cvar_RegisterVariable (&host_framerate);
204         Cvar_RegisterVariable (&host_speeds);
205         Cvar_RegisterVariable (&cl_maxfps);
206         Cvar_RegisterVariable (&cl_maxidlefps);
207
208         Cvar_RegisterVariable (&developer);
209         Cvar_RegisterVariable (&developer_entityparsing);
210
211         Cvar_RegisterVariable (&timestamps);
212         Cvar_RegisterVariable (&timeformat);
213 }
214
215
216 /*
217 ===============
218 Host_SaveConfig_f
219
220 Writes key bindings and archived cvars to config.cfg
221 ===============
222 */
223 void Host_SaveConfig_f(void)
224 {
225         qfile_t *f;
226
227 // dedicated servers initialize the host but don't parse and set the
228 // config.cfg cvars
229         // LordHavoc: don't save a config if it crashed in startup
230         if (host_framecount >= 3 && cls.state != ca_dedicated && !COM_CheckParm("-benchmark") && !COM_CheckParm("-capturedemo"))
231         {
232                 f = FS_Open ("config.cfg", "wb", false, false);
233                 if (!f)
234                 {
235                         Con_Print("Couldn't write config.cfg.\n");
236                         return;
237                 }
238
239                 Key_WriteBindings (f);
240                 Cvar_WriteVariables (f);
241
242                 FS_Close (f);
243         }
244 }
245
246
247 /*
248 ===============
249 Host_LoadConfig_f
250
251 Resets key bindings and cvars to defaults and then reloads scripts
252 ===============
253 */
254 void Host_LoadConfig_f(void)
255 {
256         // unlock the cvar default strings so they can be updated by the new default.cfg
257         Cvar_UnlockDefaults();
258         // reset cvars to their defaults, and then exec startup scripts again
259         Cbuf_InsertText("cvar_resettodefaults_all;exec quake.rc\n");
260 }
261
262 /*
263 =================
264 SV_ClientPrint
265
266 Sends text across to be displayed
267 FIXME: make this just a stuffed echo?
268 =================
269 */
270 void SV_ClientPrint(const char *msg)
271 {
272         if (host_client->netconnection)
273         {
274                 MSG_WriteByte(&host_client->netconnection->message, svc_print);
275                 MSG_WriteString(&host_client->netconnection->message, msg);
276         }
277 }
278
279 /*
280 =================
281 SV_ClientPrintf
282
283 Sends text across to be displayed
284 FIXME: make this just a stuffed echo?
285 =================
286 */
287 void SV_ClientPrintf(const char *fmt, ...)
288 {
289         va_list argptr;
290         char msg[MAX_INPUTLINE];
291
292         va_start(argptr,fmt);
293         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
294         va_end(argptr);
295
296         SV_ClientPrint(msg);
297 }
298
299 /*
300 =================
301 SV_BroadcastPrint
302
303 Sends text to all active clients
304 =================
305 */
306 void SV_BroadcastPrint(const char *msg)
307 {
308         int i;
309         client_t *client;
310
311         for (i = 0, client = svs.clients;i < svs.maxclients;i++, client++)
312         {
313                 if (client->active && client->netconnection)
314                 {
315                         MSG_WriteByte(&client->netconnection->message, svc_print);
316                         MSG_WriteString(&client->netconnection->message, msg);
317                 }
318         }
319
320         if (sv_echobprint.integer && cls.state == ca_dedicated)
321                 Con_Print(msg);
322 }
323
324 /*
325 =================
326 SV_BroadcastPrintf
327
328 Sends text to all active clients
329 =================
330 */
331 void SV_BroadcastPrintf(const char *fmt, ...)
332 {
333         va_list argptr;
334         char msg[MAX_INPUTLINE];
335
336         va_start(argptr,fmt);
337         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
338         va_end(argptr);
339
340         SV_BroadcastPrint(msg);
341 }
342
343 /*
344 =================
345 Host_ClientCommands
346
347 Send text over to the client to be executed
348 =================
349 */
350 void Host_ClientCommands(const char *fmt, ...)
351 {
352         va_list argptr;
353         char string[MAX_INPUTLINE];
354
355         if (!host_client->netconnection)
356                 return;
357
358         va_start(argptr,fmt);
359         dpvsnprintf(string, sizeof(string), fmt, argptr);
360         va_end(argptr);
361
362         MSG_WriteByte(&host_client->netconnection->message, svc_stufftext);
363         MSG_WriteString(&host_client->netconnection->message, string);
364 }
365
366 /*
367 =====================
368 SV_DropClient
369
370 Called when the player is getting totally kicked off the host
371 if (crash = true), don't bother sending signofs
372 =====================
373 */
374 void SV_DropClient(qboolean crash)
375 {
376         int i;
377         Con_Printf("Client \"%s\" dropped\n", host_client->name);
378
379         SV_StopDemoRecording(host_client);
380
381         // make sure edict is not corrupt (from a level change for example)
382         host_client->edict = PRVM_EDICT_NUM(host_client - svs.clients + 1);
383
384         if (host_client->netconnection)
385         {
386                 // free the client (the body stays around)
387                 if (!crash)
388                 {
389                         // LordHavoc: no opportunity for resending, so use unreliable 3 times
390                         unsigned char bufdata[8];
391                         sizebuf_t buf;
392                         memset(&buf, 0, sizeof(buf));
393                         buf.data = bufdata;
394                         buf.maxsize = sizeof(bufdata);
395                         MSG_WriteByte(&buf, svc_disconnect);
396                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
397                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
398                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
399                 }
400                 // break the net connection
401                 NetConn_Close(host_client->netconnection);
402                 host_client->netconnection = NULL;
403         }
404
405         // call qc ClientDisconnect function
406         // LordHavoc: don't call QC if server is dead (avoids recursive
407         // Host_Error in some mods when they run out of edicts)
408         if (host_client->clientconnectcalled && sv.active && host_client->edict)
409         {
410                 // call the prog function for removing a client
411                 // this will set the body to a dead frame, among other things
412                 int saveSelf = prog->globals.server->self;
413                 host_client->clientconnectcalled = false;
414                 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
415                 PRVM_ExecuteProgram(prog->globals.server->ClientDisconnect, "QC function ClientDisconnect is missing");
416                 prog->globals.server->self = saveSelf;
417         }
418
419         // if a download is active, close it
420         if (host_client->download_file)
421         {
422                 Con_DPrintf("Download of %s aborted when %s dropped\n", host_client->download_name, host_client->name);
423                 FS_Close(host_client->download_file);
424                 host_client->download_file = NULL;
425                 host_client->download_name[0] = 0;
426                 host_client->download_expectedposition = 0;
427                 host_client->download_started = false;
428         }
429
430         // remove leaving player from scoreboard
431         host_client->name[0] = 0;
432         host_client->colors = 0;
433         host_client->frags = 0;
434         // send notification to all clients
435         // get number of client manually just to make sure we get it right...
436         i = host_client - svs.clients;
437         MSG_WriteByte (&sv.reliable_datagram, svc_updatename);
438         MSG_WriteByte (&sv.reliable_datagram, i);
439         MSG_WriteString (&sv.reliable_datagram, host_client->name);
440         MSG_WriteByte (&sv.reliable_datagram, svc_updatecolors);
441         MSG_WriteByte (&sv.reliable_datagram, i);
442         MSG_WriteByte (&sv.reliable_datagram, host_client->colors);
443         MSG_WriteByte (&sv.reliable_datagram, svc_updatefrags);
444         MSG_WriteByte (&sv.reliable_datagram, i);
445         MSG_WriteShort (&sv.reliable_datagram, host_client->frags);
446
447         // free the client now
448         if (host_client->entitydatabase)
449                 EntityFrame_FreeDatabase(host_client->entitydatabase);
450         if (host_client->entitydatabase4)
451                 EntityFrame4_FreeDatabase(host_client->entitydatabase4);
452         if (host_client->entitydatabase5)
453                 EntityFrame5_FreeDatabase(host_client->entitydatabase5);
454
455         if (sv.active)
456         {
457                 // clear a fields that matter to DP_SV_CLIENTNAME and DP_SV_CLIENTCOLORS, and also frags
458                 PRVM_ED_ClearEdict(host_client->edict);
459         }
460
461         // clear the client struct (this sets active to false)
462         memset(host_client, 0, sizeof(*host_client));
463
464         // update server listing on the master because player count changed
465         // (which the master uses for filtering empty/full servers)
466         NetConn_Heartbeat(1);
467
468         if (sv.loadgame)
469         {
470                 for (i = 0;i < svs.maxclients;i++)
471                         if (svs.clients[i].active && !svs.clients[i].spawned)
472                                 break;
473                 if (i == svs.maxclients)
474                 {
475                         Con_Printf("Loaded game, everyone rejoined - unpausing\n");
476                         sv.paused = sv.loadgame = false; // we're basically done with loading now
477                 }
478         }
479 }
480
481 /*
482 ==================
483 Host_ShutdownServer
484
485 This only happens at the end of a game, not between levels
486 ==================
487 */
488 void Host_ShutdownServer(void)
489 {
490         int i;
491
492         Con_DPrintf("Host_ShutdownServer\n");
493
494         if (!sv.active)
495                 return;
496
497         NetConn_Heartbeat(2);
498         NetConn_Heartbeat(2);
499
500 // make sure all the clients know we're disconnecting
501         SV_VM_Begin();
502         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
503                 if (host_client->active)
504                         SV_DropClient(false); // server shutdown
505         SV_VM_End();
506
507         NetConn_CloseServerPorts();
508
509         sv.active = false;
510 //
511 // clear structures
512 //
513         memset(&sv, 0, sizeof(sv));
514         memset(svs.clients, 0, svs.maxclients*sizeof(client_t));
515 }
516
517
518 //============================================================================
519
520 /*
521 ===================
522 Host_GetConsoleCommands
523
524 Add them exactly as if they had been typed at the console
525 ===================
526 */
527 void Host_GetConsoleCommands (void)
528 {
529         char *cmd;
530
531         while (1)
532         {
533                 cmd = Sys_ConsoleInput ();
534                 if (!cmd)
535                         break;
536                 Cbuf_AddText (cmd);
537         }
538 }
539
540 /*
541 ==================
542 Host_TimeReport
543
544 Returns a time report string, for example for
545 ==================
546 */
547 const char *Host_TimingReport()
548 {
549         return va("%.1f%% CPU, %.2f%% lost, offset avg %.1fms, max %.1fms, sdev %.1fms", svs.perf_cpuload * 100, svs.perf_lost * 100, svs.perf_offset_avg * 1000, svs.perf_offset_max * 1000, svs.perf_offset_sdev * 1000);
550 }
551
552 /*
553 ==================
554 Host_Frame
555
556 Runs all active servers
557 ==================
558 */
559 static void Host_Init(void);
560 void Host_Main(void)
561 {
562         double time1 = 0;
563         double time2 = 0;
564         double time3 = 0;
565         double cl_timer, sv_timer;
566         double clframetime, deltarealtime, oldrealtime;
567         double wait;
568         int pass1, pass2, pass3, i;
569
570         Host_Init();
571
572         cl_timer = 0;
573         sv_timer = 0;
574
575         realtime = Sys_DoubleTime();
576         for (;;)
577         {
578                 if (setjmp(host_abortframe))
579                         continue;                       // something bad happened, or the server disconnected
580
581                 oldrealtime = realtime;
582                 realtime = Sys_DoubleTime();
583
584                 deltarealtime = realtime - oldrealtime;
585                 cl_timer += deltarealtime;
586                 sv_timer += deltarealtime;
587
588                 svs.perf_acc_realtime += deltarealtime;
589
590                 // Look for clients who have spawned
591                 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
592                         if(host_client->spawned)
593                                 if(host_client->netconnection)
594                                         break;
595                 if(i == svs.maxclients)
596                 {
597                         // Nobody is looking? Then we won't do timing...
598                         // Instead, reset it to zero
599                         svs.perf_acc_realtime = svs.perf_acc_sleeptime = svs.perf_acc_lost = svs.perf_acc_offset = svs.perf_acc_offset_squared = svs.perf_acc_offset_max = svs.perf_acc_offset_samples = 0;
600                 }
601                 else if(svs.perf_acc_realtime > 5)
602                 {
603                         svs.perf_cpuload = 1 - svs.perf_acc_sleeptime / svs.perf_acc_realtime;
604                         svs.perf_lost = svs.perf_acc_lost / svs.perf_acc_realtime;
605                         if(svs.perf_acc_offset_samples > 0)
606                         {
607                                 svs.perf_offset_max = svs.perf_acc_offset_max;
608                                 svs.perf_offset_avg = svs.perf_acc_offset / svs.perf_acc_offset_samples;
609                                 svs.perf_offset_sdev = sqrt(svs.perf_acc_offset_squared / svs.perf_acc_offset_samples - svs.perf_offset_avg * svs.perf_offset_avg);
610                         }
611                         if(svs.perf_lost > 0)
612                                 Con_DPrintf("Server can't keep up: %s\n", Host_TimingReport());
613                         svs.perf_acc_realtime = svs.perf_acc_sleeptime = svs.perf_acc_lost = svs.perf_acc_offset = svs.perf_acc_offset_squared = svs.perf_acc_offset_max = svs.perf_acc_offset_samples = 0;
614                 }
615
616                 if (slowmo.value < 0.00001 && slowmo.value != 0)
617                         Cvar_SetValue("slowmo", 0);
618                 if (host_framerate.value < 0.00001 && host_framerate.value != 0)
619                         Cvar_SetValue("host_framerate", 0);
620
621                 // keep the random time dependent, but not when playing demos/benchmarking
622                 if(!*sv_random_seed.string && !cls.demoplayback)
623                         rand();
624
625                 cl.islocalgame = NetConn_IsLocalGame();
626
627                 // get new key events
628                 Sys_SendKeyEvents();
629
630                 NetConn_UpdateSockets();
631
632                 Log_DestBuffer_Flush();
633
634                 // receive packets on each main loop iteration, as the main loop may
635                 // be undersleeping due to select() detecting a new packet
636                 if (sv.active)
637                         NetConn_ServerFrame();
638
639                 Curl_Run();
640
641                 // check for commands typed to the host
642                 Host_GetConsoleCommands();
643
644                 // when a server is running we only execute console commands on server frames
645                 // (this mainly allows frikbot .way config files to work properly by staying in sync with the server qc)
646                 // otherwise we execute them on all frames
647                 if (sv_timer > 0 || !sv.active)
648                 {
649                         // process console commands
650                         Cbuf_Execute();
651                 }
652
653                 //Con_Printf("%6.0f %6.0f\n", cl_timer * 1000000.0, sv_timer * 1000000.0);
654
655                 // if the accumulators haven't become positive yet, wait a while
656                 if (cls.state == ca_dedicated)
657                         wait = sv_timer * -1000000.0;
658                 else if (!sv.active)
659                         wait = cl_timer * -1000000.0;
660                 else
661                         wait = max(cl_timer, sv_timer) * -1000000.0;
662                 if (wait > 100000)
663                         wait = 100000;
664
665                 if (!cls.timedemo && wait > 0)
666                 {
667                         double time0 = Sys_DoubleTime();
668                         if (sv_checkforpacketsduringsleep.integer)
669                         {
670                                 if (wait >= 1)
671                                         NetConn_SleepMicroseconds((int)wait);
672                         }
673                         else
674                         {
675                                 if (wait >= 1000)
676                                         Sys_Sleep((int)wait / 1000);
677                         }
678                         svs.perf_acc_sleeptime += Sys_DoubleTime() - time0;
679                         continue;
680                 }
681
682         //-------------------
683         //
684         // server operations
685         //
686         //-------------------
687
688                 // limit the frametime steps to no more than 100ms each
689                 if (cl_timer > 0.1)
690                         cl_timer = 0.1;
691                 if (sv_timer > 0.1)
692                 {
693                         svs.perf_acc_lost += (sv_timer - 0.1);
694                         sv_timer = 0.1;
695                 }
696
697                 if (sv.active && sv_timer > 0)
698                 {
699                         // execute one or more server frames, with an upper limit on how much
700                         // execution time to spend on server frames to avoid freezing the game if
701                         // the server is overloaded, this execution time limit means the game will
702                         // slow down if the server is taking too long.
703                         int framecount, framelimit = 1;
704                         double advancetime, aborttime = 0;
705                         float offset;
706
707                         // run the world state
708                         // don't allow simulation to run too fast or too slow or logic glitches can occur
709
710                         // stop running server frames if the wall time reaches this value
711                         if (sys_ticrate.value <= 0)
712                                 advancetime = sv_timer;
713                         else if (cl.islocalgame && !sv_fixedframeratesingleplayer.integer)
714                         {
715                                 // synchronize to the client frametime, but no less than 10ms and no more than sys_ticrate
716                                 advancetime = bound(0.01, cl_timer, sys_ticrate.value);
717                                 framelimit = 10;
718                                 aborttime = realtime + 0.1;
719                         }
720                         else
721                         {
722                                 advancetime = sys_ticrate.value;
723                                 // listen servers can run multiple server frames per client frame
724                                 if (cls.state == ca_connected)
725                                 {
726                                         framelimit = 10;
727                                         aborttime = realtime + 0.1;
728                                 }
729                         }
730                         advancetime = min(advancetime, 0.1);
731
732                         if(advancetime > 0)
733                         {
734                                 offset = sv_timer + (Sys_DoubleTime() - realtime);
735                                 ++svs.perf_acc_offset_samples;
736                                 svs.perf_acc_offset += offset;
737                                 svs.perf_acc_offset_squared += offset * offset;
738                                 if(svs.perf_acc_offset_max < offset)
739                                         svs.perf_acc_offset_max = offset;
740                         }
741
742                         // only advance time if not paused
743                         // the game also pauses in singleplayer when menu or console is used
744                         sv.frametime = advancetime * slowmo.value;
745                         if (host_framerate.value)
746                                 sv.frametime = host_framerate.value;
747                         if (sv.paused || (cl.islocalgame && (key_dest != key_game || key_consoleactive)))
748                                 sv.frametime = 0;
749
750                         // setup the VM frame
751                         SV_VM_Begin();
752
753                         for (framecount = 0;framecount < framelimit && sv_timer > 0;framecount++)
754                         {
755                                 sv_timer -= advancetime;
756
757                                 // move things around and think unless paused
758                                 if (sv.frametime)
759                                         SV_Physics();
760
761                                 // if this server frame took too long, break out of the loop
762                                 if (framelimit > 1 && Sys_DoubleTime() >= aborttime)
763                                         break;
764                         }
765
766                         // send all messages to the clients
767                         SV_SendClientMessages();
768
769                         // end the server VM frame
770                         SV_VM_End();
771
772                         // send an heartbeat if enough time has passed since the last one
773                         NetConn_Heartbeat(0);
774                 }
775
776         //-------------------
777         //
778         // client operations
779         //
780         //-------------------
781
782                 if (cls.state != ca_dedicated && (cl_timer > 0 || cls.timedemo))
783                 {
784                         // decide the simulation time
785                         if (cls.capturevideo.active)
786                         {
787                                 if (cls.capturevideo.realtime)
788                                         clframetime = cl.realframetime = max(cl_timer, 1.0 / cls.capturevideo.framerate);
789                                 else
790                                 {
791                                         clframetime = 1.0 / cls.capturevideo.framerate;
792                                         cl.realframetime = max(cl_timer, clframetime);
793                                 }
794                         }
795                         else if (vid_activewindow)
796                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / max(5.0f, cl_maxfps.value));
797                         else
798                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / max(5.0f, cl_maxidlefps.value));
799
800                         // apply slowmo scaling
801                         clframetime *= cl.movevars_timescale;
802                         // scale playback speed of demos by slowmo cvar
803                         if (cls.demoplayback)
804                         {
805                                 clframetime *= slowmo.value;
806                                 // if demo playback is paused, don't advance time at all
807                                 if (cls.demopaused)
808                                         clframetime = 0;
809                         }
810
811                         // host_framerate overrides all else
812                         if (host_framerate.value)
813                                 clframetime = host_framerate.value;
814
815                         if (cls.timedemo)
816                                 clframetime = cl.realframetime = cl_timer;
817
818                         // deduct the frame time from the accumulator
819                         cl_timer -= cl.realframetime;
820
821                         cl.oldtime = cl.time;
822                         cl.time += clframetime;
823
824                         // Collect input into cmd
825                         CL_Input();
826
827                         // check for new packets
828                         NetConn_ClientFrame();
829
830                         // read a new frame from a demo if needed
831                         CL_ReadDemoMessage();
832
833                         // now that packets have been read, send input to server
834                         CL_SendMove();
835
836                         // update client world (interpolate entities, create trails, etc)
837                         CL_UpdateWorld();
838
839                         // update video
840                         if (host_speeds.integer)
841                                 time1 = Sys_DoubleTime();
842
843                         //ui_update();
844
845                         CL_Video_Frame();
846 #ifdef SUPPORT_GECKO
847                         CL_Gecko_Frame();
848 #endif
849
850                         CL_UpdateScreen();
851
852                         if (host_speeds.integer)
853                                 time2 = Sys_DoubleTime();
854
855                         // update audio
856                         if(cl.csqc_usecsqclistener)
857                         {
858                                 S_Update(&cl.csqc_listenermatrix);
859                                 cl.csqc_usecsqclistener = false;
860                         }
861                         else
862                                 S_Update(&r_view.matrix);
863
864                         CDAudio_Update();
865
866                         if (host_speeds.integer)
867                         {
868                                 pass1 = (int)((time1 - time3)*1000000);
869                                 time3 = Sys_DoubleTime();
870                                 pass2 = (int)((time2 - time1)*1000000);
871                                 pass3 = (int)((time3 - time2)*1000000);
872                                 Con_Printf("%6ius total %6ius server %6ius gfx %6ius snd\n",
873                                                         pass1+pass2+pass3, pass1, pass2, pass3);
874                         }
875                 }
876
877                 // if there is some time remaining from this frame, reset the timers
878                 if (cl_timer >= 0)
879                         cl_timer = 0;
880                 if (sv_timer >= 0)
881                 {
882                         svs.perf_acc_lost += sv_timer;
883                         sv_timer = 0;
884                 }
885
886                 host_framecount++;
887         }
888 }
889
890 //============================================================================
891
892 qboolean vid_opened = false;
893 void Host_StartVideo(void)
894 {
895         if (!vid_opened && cls.state != ca_dedicated)
896         {
897                 vid_opened = true;
898                 VID_Start();
899                 CDAudio_Startup();
900         }
901 }
902
903 char engineversion[128];
904
905 qboolean sys_nostdout = false;
906
907 extern void Render_Init(void);
908 extern void Mathlib_Init(void);
909 extern void FS_Init(void);
910 extern void FS_Shutdown(void);
911 extern void PR_Cmd_Init(void);
912 extern void COM_Init_Commands(void);
913 extern void FS_Init_Commands(void);
914 extern qboolean host_stuffcmdsrun;
915
916 /*
917 ====================
918 Host_Init
919 ====================
920 */
921 static void Host_Init (void)
922 {
923         int i;
924         const char* os;
925
926         if (COM_CheckParm("-profilegameonly"))
927                 Sys_AllowProfiling(false);
928
929         // LordHavoc: quake never seeded the random number generator before... heh
930         if (COM_CheckParm("-benchmark"))
931                 srand(0); // predictable random sequence for -benchmark
932         else
933                 srand(time(NULL));
934
935         // FIXME: this is evil, but possibly temporary
936 // COMMANDLINEOPTION: Console: -developer enables warnings and other notices (RECOMMENDED for mod developers)
937         if (COM_CheckParm("-developer"))
938         {
939                 developer.value = developer.integer = 100;
940                 developer.string = "100";
941         }
942
943         if (COM_CheckParm("-developer2"))
944         {
945                 developer.value = developer.integer = 100;
946                 developer.string = "100";
947                 developer_memory.value = developer_memory.integer = 100;
948                 developer.string = "100";
949                 developer_memorydebug.value = developer_memorydebug.integer = 100;
950                 developer_memorydebug.string = "100";
951         }
952
953 // COMMANDLINEOPTION: Console: -nostdout disables text output to the terminal the game was launched from
954         if (COM_CheckParm("-nostdout"))
955                 sys_nostdout = 1;
956
957         // used by everything
958         Memory_Init();
959
960         // initialize console command/cvar/alias/command execution systems
961         Cmd_Init();
962
963         // initialize memory subsystem cvars/commands
964         Memory_Init_Commands();
965
966         // initialize console and logging and its cvars/commands
967         Con_Init();
968
969         // initialize various cvars that could not be initialized earlier
970         Curl_Init_Commands();
971         Cmd_Init_Commands();
972         Sys_Init_Commands();
973         COM_Init_Commands();
974         FS_Init_Commands();
975
976         // initialize console window (only used by sys_win.c)
977         Sys_InitConsole();
978
979         // detect gamemode from commandline options or executable name
980         COM_InitGameType();
981
982         // construct a version string for the corner of the console
983 #if defined(__linux__)
984         os = "Linux";
985 #elif defined(WIN32)
986         os = "Windows";
987 #elif defined(__FreeBSD__)
988         os = "FreeBSD";
989 #elif defined(__NetBSD__)
990         os = "NetBSD";
991 #elif defined(__OpenBSD__)
992         os = "OpenBSD";
993 #elif defined(MACOSX)
994         os = "Mac OS X";
995 #elif defined(__MORPHOS__)
996         os = "MorphOS";
997 #else
998         os = "Unknown";
999 #endif
1000         dpsnprintf (engineversion, sizeof (engineversion), "%s %s %s", gamename, os, buildstring);
1001         Con_Printf("%s\n", engineversion);
1002
1003         // initialize ixtable
1004         Mathlib_Init();
1005
1006         // initialize filesystem (including fs_basedir, fs_gamedir, -game, scr_screenshot_name)
1007         FS_Init();
1008
1009         NetConn_Init();
1010         Curl_Init();
1011         //PR_Init();
1012         //PR_Cmd_Init();
1013         PRVM_Init();
1014         Mod_Init();
1015         World_Init();
1016         SV_Init();
1017         Host_InitCommands();
1018         Host_InitLocal();
1019         Host_ServerOptions();
1020
1021         if (cls.state != ca_dedicated)
1022         {
1023                 Con_Printf("Initializing client\n");
1024
1025                 R_Modules_Init();
1026                 Palette_Init();
1027                 MR_Init_Commands();
1028                 VID_Shared_Init();
1029                 VID_Init();
1030                 Render_Init();
1031                 S_Init();
1032                 CDAudio_Init();
1033                 Key_Init();
1034                 V_Init();
1035                 CL_Init();
1036         }
1037
1038         // set up the default startmap_sp and startmap_dm aliases (mods can
1039         // override these) and then execute the quake.rc startup script
1040         if (gamemode == GAME_NEHAHRA)
1041                 Cbuf_AddText("alias startmap_sp \"map nehstart\"\nalias startmap_dm \"map nehstart\"\nexec quake.rc\n");
1042         else if (gamemode == GAME_TRANSFUSION)
1043                 Cbuf_AddText("alias startmap_sp \"map e1m1\"\n""alias startmap_dm \"map bb1\"\nexec quake.rc\n");
1044         else if (gamemode == GAME_TEU)
1045                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec teu.rc\n");
1046         else
1047                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec quake.rc\n");
1048         Cbuf_Execute();
1049
1050         // if stuffcmds wasn't run, then quake.rc is probably missing, use default
1051         if (!host_stuffcmdsrun)
1052         {
1053                 Cbuf_AddText("exec default.cfg\nexec config.cfg\nexec autoexec.cfg\nstuffcmds\n");
1054                 Cbuf_Execute();
1055         }
1056
1057         // put up the loading image so the user doesn't stare at a black screen...
1058         SCR_BeginLoadingPlaque();
1059
1060         // FIXME: put this into some neat design, but the menu should be allowed to crash
1061         // without crashing the whole game, so this should just be a short-time solution
1062
1063         // here comes the not so critical stuff
1064         if (setjmp(host_abortframe)) {
1065                 return;
1066         }
1067
1068         if (cls.state != ca_dedicated)
1069         {
1070                 MR_Init();
1071         }
1072
1073         // check for special benchmark mode
1074 // COMMANDLINEOPTION: Client: -benchmark <demoname> runs a timedemo and quits, results of any timedemo can be found in gamedir/benchmark.log (for example id1/benchmark.log)
1075         i = COM_CheckParm("-benchmark");
1076         if (i && i + 1 < com_argc)
1077         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1078         {
1079                 Cbuf_AddText(va("timedemo %s\n", com_argv[i + 1]));
1080                 Cbuf_Execute();
1081         }
1082
1083         // check for special demo mode
1084 // COMMANDLINEOPTION: Client: -demo <demoname> runs a playdemo and quits
1085         i = COM_CheckParm("-demo");
1086         if (i && i + 1 < com_argc)
1087         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1088         {
1089                 Cbuf_AddText(va("playdemo %s\n", com_argv[i + 1]));
1090                 Cbuf_Execute();
1091         }
1092
1093 // COMMANDLINEOPTION: Client: -capturedemo <demoname> captures a playdemo and quits
1094         i = COM_CheckParm("-capturedemo");
1095         if (i && i + 1 < com_argc)
1096         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1097         {
1098                 Cbuf_AddText(va("playdemo %s\ncl_capturevideo 1\n", com_argv[i + 1]));
1099                 Cbuf_Execute();
1100         }
1101
1102         if (cls.state == ca_dedicated || COM_CheckParm("-listen"))
1103         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1104         {
1105                 Cbuf_AddText("startmap_dm\n");
1106                 Cbuf_Execute();
1107         }
1108
1109         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1110         {
1111                 if (gamemode == GAME_NEXUIZ)
1112                         Cbuf_AddText("togglemenu\nplayvideo logo\ncd loop 1\n");
1113                 else
1114                         Cbuf_AddText("togglemenu\n");
1115                 Cbuf_Execute();
1116         }
1117
1118         Con_DPrint("========Initialized=========\n");
1119
1120         //Host_StartVideo();
1121 }
1122
1123
1124 /*
1125 ===============
1126 Host_Shutdown
1127
1128 FIXME: this is a callback from Sys_Quit and Sys_Error.  It would be better
1129 to run quit through here before the final handoff to the sys code.
1130 ===============
1131 */
1132 void Host_Shutdown(void)
1133 {
1134         static qboolean isdown = false;
1135
1136         if (isdown)
1137         {
1138                 Con_Print("recursive shutdown\n");
1139                 return;
1140         }
1141         if (setjmp(host_abortframe))
1142         {
1143                 Con_Print("aborted the quitting frame?!?\n");
1144                 return;
1145         }
1146         isdown = true;
1147
1148         // be quiet while shutting down
1149         S_StopAllSounds();
1150
1151         // disconnect client from server if active
1152         CL_Disconnect();
1153
1154         // shut down local server if active
1155         Host_ShutdownServer ();
1156
1157         // Shutdown menu
1158         if(MR_Shutdown)
1159                 MR_Shutdown();
1160
1161         // AK shutdown PRVM
1162         // AK hmm, no PRVM_Shutdown(); yet
1163
1164 #ifdef SUPPORT_GECKO
1165         CL_Gecko_Shutdown();
1166 #endif
1167         CL_Video_Shutdown();
1168
1169         Host_SaveConfig_f();
1170
1171         CDAudio_Shutdown ();
1172         S_Terminate ();
1173         Curl_Shutdown ();
1174         NetConn_Shutdown ();
1175         //PR_Shutdown ();
1176
1177         if (cls.state != ca_dedicated)
1178         {
1179                 R_Modules_Shutdown();
1180                 VID_Shutdown();
1181         }
1182
1183         Cmd_Shutdown();
1184         CL_Shutdown();
1185         Sys_Shutdown();
1186         Log_Close();
1187         FS_Shutdown();
1188         Memory_Shutdown();
1189 }
1190