Two new cvars for blood particles: decal alpha, decal random scaling (min/max)
[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 #include "snd_main.h"
33
34 /*
35
36 A server can always be started, even if the system started out as a client
37 to a remote system.
38
39 A client can NOT be started if the system started as a dedicated server.
40
41 Memory is cleared / released when a server or client begins, not when they end.
42
43 */
44
45 // how many frames have occurred
46 // (checked by Host_Error and Host_SaveConfig_f)
47 int host_framecount = 0;
48 // LordHavoc: set when quit is executed
49 qboolean host_shuttingdown = false;
50
51 // the real time since application started, without any slowmo or clamping
52 double realtime;
53
54 // current client
55 client_t *host_client;
56
57 jmp_buf host_abortframe;
58 double host_starttime = 0;
59
60 // pretend frames take this amount of time (in seconds), 0 = realtime
61 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"};
62 // shows time used by certain subsystems
63 cvar_t host_speeds = {0, "host_speeds","0", "reports how much time is used in server/graphics/sound"};
64 cvar_t cl_minfps = {CVAR_SAVE, "cl_minfps", "40", "minimum fps target - while the rendering performance is below this, it will drift toward lower quality"};
65 cvar_t cl_minfps_fade = {CVAR_SAVE, "cl_minfps_fade", "0.2", "how fast the quality adapts to varying framerate"};
66 cvar_t cl_minfps_qualitymax = {CVAR_SAVE, "cl_minfps_qualitymax", "1", "highest allowed drawdistance multiplier"};
67 cvar_t cl_minfps_qualitymin = {CVAR_SAVE, "cl_minfps_qualitymin", "0.25", "lowest allowed drawdistance multiplier"};
68 cvar_t cl_minfps_qualitypower = {CVAR_SAVE, "cl_minfps_qualitypower", "4", "raises quality value to a power of itself, higher values make quality drop more sharply in relation to framerate"};
69 cvar_t cl_minfps_qualityscale = {CVAR_SAVE, "cl_minfps_qualityscale", "0.5", "multiplier for quality"};
70 cvar_t cl_maxfps = {CVAR_SAVE, "cl_maxfps", "0", "maximum fps cap, 0 = unlimited, if game is running faster than this it will wait before running another frame (useful to make cpu time available to other programs)"};
71 cvar_t cl_maxfps_alwayssleep = {0, "cl_maxfps_alwayssleep","1", "gives up some processing time to other applications each frame, value in milliseconds, disabled if cl_maxfps is 0"};
72 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"};
73
74 cvar_t developer = {CVAR_SAVE, "developer","0", "prints debugging messages and information (recommended for all developers and level designers)"};
75 cvar_t developer_extra = {0, "developer_extra", "0", "prints additional debugging messages, often very verbose!"};
76 cvar_t developer_insane = {0, "developer_insane", "0", "prints huge streams of information about internal workings, entire contents of files being read/written, etc.  Not recommended!"};
77 cvar_t developer_loadfile = {0, "developer_loadfile","0", "prints name and size of every file loaded via the FS_LoadFile function (which is almost everything)"};
78 cvar_t developer_loading = {0, "developer_loading","0", "prints information about files as they are loaded or unloaded successfully"};
79 cvar_t developer_entityparsing = {0, "developer_entityparsing", "0", "prints detailed network entities information each time a packet is received"};
80
81 cvar_t timestamps = {CVAR_SAVE, "timestamps", "0", "prints timestamps on console messages"};
82 cvar_t timeformat = {CVAR_SAVE, "timeformat", "[%Y-%m-%d %H:%M:%S] ", "time format to use on timestamped console messages"};
83
84 /*
85 ================
86 Host_AbortCurrentFrame
87
88 aborts the current host frame and goes on with the next one
89 ================
90 */
91 void Host_AbortCurrentFrame(void)
92 {
93         longjmp (host_abortframe, 1);
94 }
95
96 /*
97 ================
98 Host_Error
99
100 This shuts down both the client and server
101 ================
102 */
103 void Host_Error (const char *error, ...)
104 {
105         static char hosterrorstring1[MAX_INPUTLINE];
106         static char hosterrorstring2[MAX_INPUTLINE];
107         static qboolean hosterror = false;
108         va_list argptr;
109
110         // turn off rcon redirect if it was active when the crash occurred
111         // to prevent loops when it is a networking problem
112         Con_Rcon_Redirect_Abort();
113
114         va_start (argptr,error);
115         dpvsnprintf (hosterrorstring1,sizeof(hosterrorstring1),error,argptr);
116         va_end (argptr);
117
118         Con_Printf("Host_Error: %s\n", hosterrorstring1);
119
120         // LordHavoc: if crashing very early, or currently shutting down, do
121         // Sys_Error instead
122         if (host_framecount < 3 || host_shuttingdown)
123                 Sys_Error ("Host_Error: %s", hosterrorstring1);
124
125         if (hosterror)
126                 Sys_Error ("Host_Error: recursively entered (original error was: %s    new error is: %s)", hosterrorstring2, hosterrorstring1);
127         hosterror = true;
128
129         strlcpy(hosterrorstring2, hosterrorstring1, sizeof(hosterrorstring2));
130
131         CL_Parse_DumpPacket();
132
133         CL_Parse_ErrorCleanUp();
134
135         //PR_Crash();
136
137         // print out where the crash happened, if it was caused by QC (and do a cleanup)
138         PRVM_Crash();
139
140
141         Host_ShutdownServer ();
142
143         if (cls.state == ca_dedicated)
144                 Sys_Error ("Host_Error: %s",hosterrorstring2);  // dedicated servers exit
145
146         CL_Disconnect ();
147         cls.demonum = -1;
148
149         hosterror = false;
150
151         Host_AbortCurrentFrame();
152 }
153
154 void Host_ServerOptions (void)
155 {
156         int i;
157
158         // general default
159         svs.maxclients = 8;
160
161 // COMMANDLINEOPTION: Server: -dedicated [playerlimit] starts a dedicated server (with a command console), default playerlimit is 8
162 // COMMANDLINEOPTION: Server: -listen [playerlimit] starts a multiplayer server with graphical client, like singleplayer but other players can connect, default playerlimit is 8
163         // if no client is in the executable or -dedicated is specified on
164         // commandline, start a dedicated server
165         i = COM_CheckParm ("-dedicated");
166         if (i || !cl_available)
167         {
168                 cls.state = ca_dedicated;
169                 // check for -dedicated specifying how many players
170                 if (i && i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
171                         svs.maxclients = atoi (com_argv[i+1]);
172                 if (COM_CheckParm ("-listen"))
173                         Con_Printf ("Only one of -dedicated or -listen can be specified\n");
174                 // default sv_public on for dedicated servers (often hosted by serious administrators), off for listen servers (often hosted by clueless users)
175                 Cvar_SetValue("sv_public", 1);
176         }
177         else if (cl_available)
178         {
179                 // client exists and not dedicated, check if -listen is specified
180                 cls.state = ca_disconnected;
181                 i = COM_CheckParm ("-listen");
182                 if (i)
183                 {
184                         // default players unless specified
185                         if (i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
186                                 svs.maxclients = atoi (com_argv[i+1]);
187                 }
188                 else
189                 {
190                         // default players in some games, singleplayer in most
191                         if (gamemode != GAME_GOODVSBAD2 && gamemode != GAME_NEXUIZ && gamemode != GAME_BATTLEMECH)
192                                 svs.maxclients = 1;
193                 }
194         }
195
196         svs.maxclients = svs.maxclients_next = bound(1, svs.maxclients, MAX_SCOREBOARD);
197
198         svs.clients = (client_t *)Mem_Alloc(sv_mempool, sizeof(client_t) * svs.maxclients);
199
200         if (svs.maxclients > 1 && !deathmatch.integer && !coop.integer)
201                 Cvar_SetValueQuick(&deathmatch, 1);
202 }
203
204 /*
205 =======================
206 Host_InitLocal
207 ======================
208 */
209 void Host_SaveConfig_f(void);
210 void Host_LoadConfig_f(void);
211 extern cvar_t sv_writepicture_quality;
212 static void Host_InitLocal (void)
213 {
214         Cmd_AddCommand("saveconfig", Host_SaveConfig_f, "save settings to config.cfg (or a specified filename) immediately (also automatic when quitting)");
215         Cmd_AddCommand("loadconfig", Host_LoadConfig_f, "reset everything and reload configs");
216
217         Cvar_RegisterVariable (&host_framerate);
218         Cvar_RegisterVariable (&host_speeds);
219         Cvar_RegisterVariable (&cl_minfps);
220         Cvar_RegisterVariable (&cl_minfps_fade);
221         Cvar_RegisterVariable (&cl_minfps_qualitymax);
222         Cvar_RegisterVariable (&cl_minfps_qualitymin);
223         Cvar_RegisterVariable (&cl_minfps_qualitypower);
224         Cvar_RegisterVariable (&cl_minfps_qualityscale);
225         Cvar_RegisterVariable (&cl_maxfps);
226         Cvar_RegisterVariable (&cl_maxfps_alwayssleep);
227         Cvar_RegisterVariable (&cl_maxidlefps);
228
229         Cvar_RegisterVariable (&developer);
230         Cvar_RegisterVariable (&developer_extra);
231         Cvar_RegisterVariable (&developer_insane);
232         Cvar_RegisterVariable (&developer_loadfile);
233         Cvar_RegisterVariable (&developer_loading);
234         Cvar_RegisterVariable (&developer_entityparsing);
235
236         Cvar_RegisterVariable (&timestamps);
237         Cvar_RegisterVariable (&timeformat);
238
239         Cvar_RegisterVariable (&sv_writepicture_quality);
240 }
241
242
243 /*
244 ===============
245 Host_SaveConfig_f
246
247 Writes key bindings and archived cvars to config.cfg
248 ===============
249 */
250 void Host_SaveConfig_to(const char *file)
251 {
252         qfile_t *f;
253
254 // dedicated servers initialize the host but don't parse and set the
255 // config.cfg cvars
256         // LordHavoc: don't save a config if it crashed in startup
257         if (host_framecount >= 3 && cls.state != ca_dedicated && !COM_CheckParm("-benchmark") && !COM_CheckParm("-capturedemo"))
258         {
259                 f = FS_OpenRealFile(file, "wb", false);
260                 if (!f)
261                 {
262                         Con_Printf("Couldn't write %s.\n", file);
263                         return;
264                 }
265
266                 Key_WriteBindings (f);
267                 Cvar_WriteVariables (f);
268
269                 FS_Close (f);
270         }
271 }
272 void Host_SaveConfig(void)
273 {
274         Host_SaveConfig_to("config.cfg");
275 }
276 void Host_SaveConfig_f(void)
277 {
278         const char *file = "config.cfg";
279
280         if(Cmd_Argc() >= 2) {
281                 file = Cmd_Argv(1);
282                 Con_Printf("Saving to %s\n", file);
283         }
284
285         Host_SaveConfig_to(file);
286 }
287
288 /*
289 ===============
290 Host_LoadConfig_f
291
292 Resets key bindings and cvars to defaults and then reloads scripts
293 ===============
294 */
295 void Host_LoadConfig_f(void)
296 {
297         // unlock the cvar default strings so they can be updated by the new default.cfg
298         Cvar_UnlockDefaults();
299         // reset cvars to their defaults, and then exec startup scripts again
300         Cbuf_InsertText("cvar_resettodefaults_all;exec quake.rc\n");
301 }
302
303 /*
304 =================
305 SV_ClientPrint
306
307 Sends text across to be displayed
308 FIXME: make this just a stuffed echo?
309 =================
310 */
311 void SV_ClientPrint(const char *msg)
312 {
313         if (host_client->netconnection)
314         {
315                 MSG_WriteByte(&host_client->netconnection->message, svc_print);
316                 MSG_WriteString(&host_client->netconnection->message, msg);
317         }
318 }
319
320 /*
321 =================
322 SV_ClientPrintf
323
324 Sends text across to be displayed
325 FIXME: make this just a stuffed echo?
326 =================
327 */
328 void SV_ClientPrintf(const char *fmt, ...)
329 {
330         va_list argptr;
331         char msg[MAX_INPUTLINE];
332
333         va_start(argptr,fmt);
334         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
335         va_end(argptr);
336
337         SV_ClientPrint(msg);
338 }
339
340 /*
341 =================
342 SV_BroadcastPrint
343
344 Sends text to all active clients
345 =================
346 */
347 void SV_BroadcastPrint(const char *msg)
348 {
349         int i;
350         client_t *client;
351
352         for (i = 0, client = svs.clients;i < svs.maxclients;i++, client++)
353         {
354                 if (client->active && client->netconnection)
355                 {
356                         MSG_WriteByte(&client->netconnection->message, svc_print);
357                         MSG_WriteString(&client->netconnection->message, msg);
358                 }
359         }
360
361         if (sv_echobprint.integer && cls.state == ca_dedicated)
362                 Con_Print(msg);
363 }
364
365 /*
366 =================
367 SV_BroadcastPrintf
368
369 Sends text to all active clients
370 =================
371 */
372 void SV_BroadcastPrintf(const char *fmt, ...)
373 {
374         va_list argptr;
375         char msg[MAX_INPUTLINE];
376
377         va_start(argptr,fmt);
378         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
379         va_end(argptr);
380
381         SV_BroadcastPrint(msg);
382 }
383
384 /*
385 =================
386 Host_ClientCommands
387
388 Send text over to the client to be executed
389 =================
390 */
391 void Host_ClientCommands(const char *fmt, ...)
392 {
393         va_list argptr;
394         char string[MAX_INPUTLINE];
395
396         if (!host_client->netconnection)
397                 return;
398
399         va_start(argptr,fmt);
400         dpvsnprintf(string, sizeof(string), fmt, argptr);
401         va_end(argptr);
402
403         MSG_WriteByte(&host_client->netconnection->message, svc_stufftext);
404         MSG_WriteString(&host_client->netconnection->message, string);
405 }
406
407 /*
408 =====================
409 SV_DropClient
410
411 Called when the player is getting totally kicked off the host
412 if (crash = true), don't bother sending signofs
413 =====================
414 */
415 void SV_DropClient(qboolean crash)
416 {
417         int i;
418         Con_Printf("Client \"%s\" dropped\n", host_client->name);
419
420         SV_StopDemoRecording(host_client);
421
422         // make sure edict is not corrupt (from a level change for example)
423         host_client->edict = PRVM_EDICT_NUM(host_client - svs.clients + 1);
424
425         if (host_client->netconnection)
426         {
427                 // free the client (the body stays around)
428                 if (!crash)
429                 {
430                         // LordHavoc: no opportunity for resending, so use unreliable 3 times
431                         unsigned char bufdata[8];
432                         sizebuf_t buf;
433                         memset(&buf, 0, sizeof(buf));
434                         buf.data = bufdata;
435                         buf.maxsize = sizeof(bufdata);
436                         MSG_WriteByte(&buf, svc_disconnect);
437                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
438                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
439                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
440                 }
441                 // break the net connection
442                 NetConn_Close(host_client->netconnection);
443                 host_client->netconnection = NULL;
444         }
445
446         // call qc ClientDisconnect function
447         // LordHavoc: don't call QC if server is dead (avoids recursive
448         // Host_Error in some mods when they run out of edicts)
449         if (host_client->clientconnectcalled && sv.active && host_client->edict)
450         {
451                 // call the prog function for removing a client
452                 // this will set the body to a dead frame, among other things
453                 int saveSelf = prog->globals.server->self;
454                 host_client->clientconnectcalled = false;
455                 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
456                 PRVM_ExecuteProgram(prog->globals.server->ClientDisconnect, "QC function ClientDisconnect is missing");
457                 prog->globals.server->self = saveSelf;
458         }
459
460         // if a download is active, close it
461         if (host_client->download_file)
462         {
463                 Con_DPrintf("Download of %s aborted when %s dropped\n", host_client->download_name, host_client->name);
464                 FS_Close(host_client->download_file);
465                 host_client->download_file = NULL;
466                 host_client->download_name[0] = 0;
467                 host_client->download_expectedposition = 0;
468                 host_client->download_started = false;
469         }
470
471         // remove leaving player from scoreboard
472         host_client->name[0] = 0;
473         host_client->colors = 0;
474         host_client->frags = 0;
475         // send notification to all clients
476         // get number of client manually just to make sure we get it right...
477         i = host_client - svs.clients;
478         MSG_WriteByte (&sv.reliable_datagram, svc_updatename);
479         MSG_WriteByte (&sv.reliable_datagram, i);
480         MSG_WriteString (&sv.reliable_datagram, host_client->name);
481         MSG_WriteByte (&sv.reliable_datagram, svc_updatecolors);
482         MSG_WriteByte (&sv.reliable_datagram, i);
483         MSG_WriteByte (&sv.reliable_datagram, host_client->colors);
484         MSG_WriteByte (&sv.reliable_datagram, svc_updatefrags);
485         MSG_WriteByte (&sv.reliable_datagram, i);
486         MSG_WriteShort (&sv.reliable_datagram, host_client->frags);
487
488         // free the client now
489         if (host_client->entitydatabase)
490                 EntityFrame_FreeDatabase(host_client->entitydatabase);
491         if (host_client->entitydatabase4)
492                 EntityFrame4_FreeDatabase(host_client->entitydatabase4);
493         if (host_client->entitydatabase5)
494                 EntityFrame5_FreeDatabase(host_client->entitydatabase5);
495
496         if (sv.active)
497         {
498                 // clear a fields that matter to DP_SV_CLIENTNAME and DP_SV_CLIENTCOLORS, and also frags
499                 PRVM_ED_ClearEdict(host_client->edict);
500         }
501
502         // clear the client struct (this sets active to false)
503         memset(host_client, 0, sizeof(*host_client));
504
505         // update server listing on the master because player count changed
506         // (which the master uses for filtering empty/full servers)
507         NetConn_Heartbeat(1);
508
509         if (sv.loadgame)
510         {
511                 for (i = 0;i < svs.maxclients;i++)
512                         if (svs.clients[i].active && !svs.clients[i].spawned)
513                                 break;
514                 if (i == svs.maxclients)
515                 {
516                         Con_Printf("Loaded game, everyone rejoined - unpausing\n");
517                         sv.paused = sv.loadgame = false; // we're basically done with loading now
518                 }
519         }
520 }
521
522 /*
523 ==================
524 Host_ShutdownServer
525
526 This only happens at the end of a game, not between levels
527 ==================
528 */
529 void Host_ShutdownServer(void)
530 {
531         int i;
532
533         Con_DPrintf("Host_ShutdownServer\n");
534
535         if (!sv.active)
536                 return;
537
538         NetConn_Heartbeat(2);
539         NetConn_Heartbeat(2);
540
541 // make sure all the clients know we're disconnecting
542         SV_VM_Begin();
543         World_End(&sv.world);
544         if(prog->loaded)
545                 if(prog->funcoffsets.SV_Shutdown)
546                 {
547                         func_t s = prog->funcoffsets.SV_Shutdown;
548                         prog->funcoffsets.SV_Shutdown = 0; // prevent it from getting called again
549                         PRVM_ExecuteProgram(s,"SV_Shutdown() required");
550                 }
551         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
552                 if (host_client->active)
553                         SV_DropClient(false); // server shutdown
554         SV_VM_End();
555
556         NetConn_CloseServerPorts();
557
558         sv.active = false;
559 //
560 // clear structures
561 //
562         memset(&sv, 0, sizeof(sv));
563         memset(svs.clients, 0, svs.maxclients*sizeof(client_t));
564 }
565
566
567 //============================================================================
568
569 /*
570 ===================
571 Host_GetConsoleCommands
572
573 Add them exactly as if they had been typed at the console
574 ===================
575 */
576 void Host_GetConsoleCommands (void)
577 {
578         char *cmd;
579
580         while (1)
581         {
582                 cmd = Sys_ConsoleInput ();
583                 if (!cmd)
584                         break;
585                 Cbuf_AddText (cmd);
586         }
587 }
588
589 /*
590 ==================
591 Host_TimeReport
592
593 Returns a time report string, for example for
594 ==================
595 */
596 const char *Host_TimingReport(void)
597 {
598         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);
599 }
600
601 /*
602 ==================
603 Host_Frame
604
605 Runs all active servers
606 ==================
607 */
608 static void Host_Init(void);
609 void Host_Main(void)
610 {
611         double time1 = 0;
612         double time2 = 0;
613         double time3 = 0;
614         double cl_timer, sv_timer;
615         double clframetime, deltarealtime, oldrealtime;
616         double wait;
617         int pass1, pass2, pass3, i;
618
619         Host_Init();
620
621         cl_timer = 0;
622         sv_timer = 0;
623
624         realtime = host_starttime = Sys_DoubleTime();
625         for (;;)
626         {
627                 if (setjmp(host_abortframe))
628                 {
629                         SCR_ClearLoadingScreen(false);
630                         continue;                       // something bad happened, or the server disconnected
631                 }
632
633                 oldrealtime = realtime;
634                 realtime = Sys_DoubleTime();
635
636                 deltarealtime = realtime - oldrealtime;
637                 cl_timer += deltarealtime;
638                 sv_timer += deltarealtime;
639
640                 svs.perf_acc_realtime += deltarealtime;
641
642                 // Look for clients who have spawned
643                 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
644                         if(host_client->spawned)
645                                 if(host_client->netconnection)
646                                         break;
647                 if(i == svs.maxclients)
648                 {
649                         // Nobody is looking? Then we won't do timing...
650                         // Instead, reset it to zero
651                         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;
652                 }
653                 else if(svs.perf_acc_realtime > 5)
654                 {
655                         svs.perf_cpuload = 1 - svs.perf_acc_sleeptime / svs.perf_acc_realtime;
656                         svs.perf_lost = svs.perf_acc_lost / svs.perf_acc_realtime;
657                         if(svs.perf_acc_offset_samples > 0)
658                         {
659                                 svs.perf_offset_max = svs.perf_acc_offset_max;
660                                 svs.perf_offset_avg = svs.perf_acc_offset / svs.perf_acc_offset_samples;
661                                 svs.perf_offset_sdev = sqrt(svs.perf_acc_offset_squared / svs.perf_acc_offset_samples - svs.perf_offset_avg * svs.perf_offset_avg);
662                         }
663                         if(svs.perf_lost > 0 && developer_extra.integer)
664                                 Con_DPrintf("Server can't keep up: %s\n", Host_TimingReport());
665                         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;
666                 }
667
668                 if (slowmo.value < 0.00001 && slowmo.value != 0)
669                         Cvar_SetValue("slowmo", 0);
670                 if (host_framerate.value < 0.00001 && host_framerate.value != 0)
671                         Cvar_SetValue("host_framerate", 0);
672
673                 // keep the random time dependent, but not when playing demos/benchmarking
674                 if(!*sv_random_seed.string && !cls.demoplayback)
675                         rand();
676
677                 cl.islocalgame = NetConn_IsLocalGame();
678
679                 // get new key events
680                 SndSys_SendKeyEvents();
681                 Sys_SendKeyEvents();
682
683                 NetConn_UpdateSockets();
684
685                 Log_DestBuffer_Flush();
686
687                 // receive packets on each main loop iteration, as the main loop may
688                 // be undersleeping due to select() detecting a new packet
689                 if (sv.active)
690                         NetConn_ServerFrame();
691
692                 Curl_Run();
693
694                 // check for commands typed to the host
695                 Host_GetConsoleCommands();
696
697                 // when a server is running we only execute console commands on server frames
698                 // (this mainly allows frikbot .way config files to work properly by staying in sync with the server qc)
699                 // otherwise we execute them on client frames
700                 if (sv.active ? sv_timer > 0 : cl_timer > 0)
701                 {
702                         // process console commands
703                         CL_VM_PreventInformationLeaks();
704                         Cbuf_Execute();
705                 }
706
707                 //Con_Printf("%6.0f %6.0f\n", cl_timer * 1000000.0, sv_timer * 1000000.0);
708
709                 // if the accumulators haven't become positive yet, wait a while
710                 if (cls.state == ca_dedicated)
711                         wait = sv_timer * -1000000.0;
712                 else if (!sv.active)
713                         wait = cl_timer * -1000000.0;
714                 else
715                         wait = max(cl_timer, sv_timer) * -1000000.0;
716                 wait = bound(0, wait, 100000);
717
718                 if (!cls.timedemo && wait >= 1)
719                 {
720                         double time0 = Sys_DoubleTime();
721                         if (sv_checkforpacketsduringsleep.integer)
722                                 NetConn_SleepMicroseconds((int)wait);
723                         else
724                                 Sys_Sleep((int)wait);
725                         svs.perf_acc_sleeptime += Sys_DoubleTime() - time0;
726                         continue;
727                 }
728
729         //-------------------
730         //
731         // server operations
732         //
733         //-------------------
734
735                 // limit the frametime steps to no more than 100ms each
736                 if (cl_timer > 0.1)
737                         cl_timer = 0.1;
738                 if (sv_timer > 0.1)
739                 {
740                         svs.perf_acc_lost += (sv_timer - 0.1);
741                         sv_timer = 0.1;
742                 }
743
744                 if (sv.active && sv_timer > 0)
745                 {
746                         // execute one or more server frames, with an upper limit on how much
747                         // execution time to spend on server frames to avoid freezing the game if
748                         // the server is overloaded, this execution time limit means the game will
749                         // slow down if the server is taking too long.
750                         int framecount, framelimit = 1;
751                         double advancetime, aborttime = 0;
752                         float offset;
753
754                         // run the world state
755                         // don't allow simulation to run too fast or too slow or logic glitches can occur
756
757                         // stop running server frames if the wall time reaches this value
758                         if (sys_ticrate.value <= 0)
759                                 advancetime = sv_timer;
760                         else if (cl.islocalgame && !sv_fixedframeratesingleplayer.integer)
761                         {
762                                 // synchronize to the client frametime, but no less than 10ms and no more than sys_ticrate
763                                 advancetime = bound(0.01, cl_timer, sys_ticrate.value);
764                                 framelimit = 10;
765                                 aborttime = realtime + 0.1;
766                         }
767                         else
768                         {
769                                 advancetime = sys_ticrate.value;
770                                 // listen servers can run multiple server frames per client frame
771                                 if (cls.state == ca_connected)
772                                 {
773                                         framelimit = 10;
774                                         aborttime = realtime + 0.1;
775                                 }
776                         }
777                         if(slowmo.value > 0 && slowmo.value < 1)
778                                 advancetime = min(advancetime, 0.1 / slowmo.value);
779                         else
780                                 advancetime = min(advancetime, 0.1);
781
782                         if(advancetime > 0)
783                         {
784                                 offset = sv_timer + (Sys_DoubleTime() - realtime);
785                                 ++svs.perf_acc_offset_samples;
786                                 svs.perf_acc_offset += offset;
787                                 svs.perf_acc_offset_squared += offset * offset;
788                                 if(svs.perf_acc_offset_max < offset)
789                                         svs.perf_acc_offset_max = offset;
790                         }
791
792                         // only advance time if not paused
793                         // the game also pauses in singleplayer when menu or console is used
794                         sv.frametime = advancetime * slowmo.value;
795                         if (host_framerate.value)
796                                 sv.frametime = host_framerate.value;
797                         if (sv.paused || (cl.islocalgame && (key_dest != key_game || key_consoleactive)))
798                                 sv.frametime = 0;
799
800                         // setup the VM frame
801                         SV_VM_Begin();
802
803                         for (framecount = 0;framecount < framelimit && sv_timer > 0;framecount++)
804                         {
805                                 sv_timer -= advancetime;
806
807                                 // move things around and think unless paused
808                                 if (sv.frametime)
809                                         SV_Physics();
810
811                                 // if this server frame took too long, break out of the loop
812                                 if (framelimit > 1 && Sys_DoubleTime() >= aborttime)
813                                         break;
814                         }
815
816                         // send all messages to the clients
817                         SV_SendClientMessages();
818                         
819                         if (sv.paused == 1 && realtime > sv.pausedstart && sv.pausedstart > 0) {
820                                 prog->globals.generic[OFS_PARM0] = realtime - sv.pausedstart;
821                                 PRVM_ExecuteProgram(prog->funcoffsets.SV_PausedTic, "QC function SV_PausedTic is missing");
822                         }
823
824                         // end the server VM frame
825                         SV_VM_End();
826
827                         // send an heartbeat if enough time has passed since the last one
828                         NetConn_Heartbeat(0);
829                 }
830
831         //-------------------
832         //
833         // client operations
834         //
835         //-------------------
836
837                 if (cls.state != ca_dedicated && (cl_timer > 0 || cls.timedemo || ((vid_activewindow ? cl_maxfps : cl_maxidlefps).value < 1)))
838                 {
839                         // decide the simulation time
840                         if (cls.capturevideo.active)
841                         {
842                                 //***
843                                 if (cls.capturevideo.realtime)
844                                         clframetime = cl.realframetime = max(cl_timer, 1.0 / cls.capturevideo.framerate);
845                                 else
846                                 {
847                                         clframetime = 1.0 / cls.capturevideo.framerate;
848                                         cl.realframetime = max(cl_timer, clframetime);
849                                 }
850                         }
851                         else if (vid_activewindow && cl_maxfps.value >= 1 && !cls.timedemo)
852                         {
853                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / cl_maxfps.value);
854                                 // when running slow, we need to sleep to keep input responsive
855                                 wait = bound(0, cl_maxfps_alwayssleep.value * 1000, 100000);
856                                 if (wait > 0)
857                                         Sys_Sleep((int)wait);
858                         }
859                         else if (!vid_activewindow && cl_maxidlefps.value >= 1 && !cls.timedemo)
860                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / cl_maxidlefps.value);
861                         else
862                                 clframetime = cl.realframetime = cl_timer;
863
864                         // apply slowmo scaling
865                         clframetime *= cl.movevars_timescale;
866                         // scale playback speed of demos by slowmo cvar
867                         if (cls.demoplayback)
868                         {
869                                 clframetime *= slowmo.value;
870                                 // if demo playback is paused, don't advance time at all
871                                 if (cls.demopaused)
872                                         clframetime = 0;
873                         }
874
875                         // host_framerate overrides all else
876                         if (host_framerate.value)
877                                 clframetime = host_framerate.value;
878
879                         if (cl.paused || (cl.islocalgame && (key_dest != key_game || key_consoleactive)))
880                                 clframetime = 0;
881
882                         if (cls.timedemo)
883                                 clframetime = cl.realframetime = cl_timer;
884
885                         // deduct the frame time from the accumulator
886                         cl_timer -= cl.realframetime;
887
888                         cl.oldtime = cl.time;
889                         cl.time += clframetime;
890
891                         // update video
892                         if (host_speeds.integer)
893                                 time1 = Sys_DoubleTime();
894
895                         // Collect input into cmd
896                         CL_Input();
897
898                         // check for new packets
899                         NetConn_ClientFrame();
900
901                         // read a new frame from a demo if needed
902                         CL_ReadDemoMessage();
903
904                         // now that packets have been read, send input to server
905                         CL_SendMove();
906
907                         // update client world (interpolate entities, create trails, etc)
908                         CL_UpdateWorld();
909
910                         CL_Video_Frame();
911                         CL_Gecko_Frame();
912
913                         CL_UpdateScreen();
914
915                         if (host_speeds.integer)
916                                 time2 = Sys_DoubleTime();
917
918                         // update audio
919                         if(cl.csqc_usecsqclistener)
920                         {
921                                 S_Update(&cl.csqc_listenermatrix);
922                                 cl.csqc_usecsqclistener = false;
923                         }
924                         else
925                                 S_Update(&r_refdef.view.matrix);
926
927                         CDAudio_Update();
928
929                         // reset gathering of mouse input
930                         in_mouse_x = in_mouse_y = 0;
931
932                         if (host_speeds.integer)
933                         {
934                                 pass1 = (int)((time1 - time3)*1000000);
935                                 time3 = Sys_DoubleTime();
936                                 pass2 = (int)((time2 - time1)*1000000);
937                                 pass3 = (int)((time3 - time2)*1000000);
938                                 Con_Printf("%6ius total %6ius server %6ius gfx %6ius snd\n",
939                                                         pass1+pass2+pass3, pass1, pass2, pass3);
940                         }
941                 }
942
943 #if MEMPARANOIA
944                 Mem_CheckSentinelsGlobal();
945 #else
946                 if (developer_memorydebug.integer)
947                         Mem_CheckSentinelsGlobal();
948 #endif
949
950                 // if there is some time remaining from this frame, reset the timers
951                 if (cl_timer >= 0)
952                         cl_timer = 0;
953                 if (sv_timer >= 0)
954                 {
955                         svs.perf_acc_lost += sv_timer;
956                         sv_timer = 0;
957                 }
958
959                 host_framecount++;
960         }
961 }
962
963 //============================================================================
964
965 qboolean vid_opened = false;
966 void Host_StartVideo(void)
967 {
968         if (!vid_opened && cls.state != ca_dedicated)
969         {
970                 vid_opened = true;
971                 // make sure we open sockets before opening video because the Windows Firewall "unblock?" dialog can screw up the graphics context on some graphics drivers
972                 NetConn_UpdateSockets();
973                 VID_Start();
974                 CDAudio_Startup();
975         }
976 }
977
978 char engineversion[128];
979
980 qboolean sys_nostdout = false;
981
982 extern void u8_Init(void);
983 extern void Render_Init(void);
984 extern void Mathlib_Init(void);
985 extern void FS_Init(void);
986 extern void FS_Shutdown(void);
987 extern void PR_Cmd_Init(void);
988 extern void COM_Init_Commands(void);
989 extern void FS_Init_Commands(void);
990 extern qboolean host_stuffcmdsrun;
991
992 /*
993 ====================
994 Host_Init
995 ====================
996 */
997 static void Host_Init (void)
998 {
999         int i;
1000         const char* os;
1001
1002         if (COM_CheckParm("-profilegameonly"))
1003                 Sys_AllowProfiling(false);
1004
1005         // LordHavoc: quake never seeded the random number generator before... heh
1006         if (COM_CheckParm("-benchmark"))
1007                 srand(0); // predictable random sequence for -benchmark
1008         else
1009                 srand(time(NULL));
1010
1011         // FIXME: this is evil, but possibly temporary
1012         // LordHavoc: doesn't seem very temporary...
1013         // LordHavoc: made this a saved cvar
1014 // COMMANDLINEOPTION: Console: -developer enables warnings and other notices (RECOMMENDED for mod developers)
1015         if (COM_CheckParm("-developer"))
1016         {
1017                 developer.value = developer.integer = 1;
1018                 developer.string = "1";
1019         }
1020
1021         if (COM_CheckParm("-developer2"))
1022         {
1023                 developer.value = developer.integer = 1;
1024                 developer.string = "1";
1025                 developer_extra.value = developer_extra.integer = 1;
1026                 developer_extra.string = "1";
1027                 developer_insane.value = developer_insane.integer = 1;
1028                 developer_insane.string = "1";
1029                 developer_memory.value = developer_memory.integer = 1;
1030                 developer_memory.string = "1";
1031                 developer_memorydebug.value = developer_memorydebug.integer = 1;
1032                 developer_memorydebug.string = "1";
1033         }
1034
1035 // COMMANDLINEOPTION: Console: -nostdout disables text output to the terminal the game was launched from
1036         if (COM_CheckParm("-nostdout"))
1037                 sys_nostdout = 1;
1038
1039         // used by everything
1040         Memory_Init();
1041
1042         // initialize console command/cvar/alias/command execution systems
1043         Cmd_Init();
1044
1045         // initialize memory subsystem cvars/commands
1046         Memory_Init_Commands();
1047
1048         // initialize console and logging and its cvars/commands
1049         Con_Init();
1050
1051         // initialize various cvars that could not be initialized earlier
1052         u8_Init();
1053         Curl_Init_Commands();
1054         Cmd_Init_Commands();
1055         Sys_Init_Commands();
1056         COM_Init_Commands();
1057         FS_Init_Commands();
1058
1059         // initialize console window (only used by sys_win.c)
1060         Sys_InitConsole();
1061
1062         // detect gamemode from commandline options or executable name
1063         COM_InitGameType();
1064
1065         // construct a version string for the corner of the console
1066         os = DP_OS_NAME;
1067         dpsnprintf (engineversion, sizeof (engineversion), "%s %s %s", gamename, os, buildstring);
1068         Con_Printf("%s\n", engineversion);
1069
1070         // initialize ixtable
1071         Mathlib_Init();
1072
1073         // initialize filesystem (including fs_basedir, fs_gamedir, -game, scr_screenshot_name)
1074         FS_Init();
1075
1076         NetConn_Init();
1077         Curl_Init();
1078         //PR_Init();
1079         //PR_Cmd_Init();
1080         PRVM_Init();
1081         Mod_Init();
1082         World_Init();
1083         SV_Init();
1084         Host_InitCommands();
1085         Host_InitLocal();
1086         Host_ServerOptions();
1087
1088         if (cls.state == ca_dedicated)
1089                 Cmd_AddCommand ("disconnect", CL_Disconnect_f, "disconnect from server (or disconnect all clients if running a server)");
1090         else
1091         {
1092                 Con_DPrintf("Initializing client\n");
1093
1094                 R_Modules_Init();
1095                 Palette_Init();
1096                 MR_Init_Commands();
1097                 VID_Shared_Init();
1098                 VID_Init();
1099                 Render_Init();
1100                 S_Init();
1101                 CDAudio_Init();
1102                 Key_Init();
1103                 V_Init();
1104                 CL_Init();
1105         }
1106
1107         // set up the default startmap_sp and startmap_dm aliases (mods can
1108         // override these) and then execute the quake.rc startup script
1109         if (gamemode == GAME_NEHAHRA)
1110                 Cbuf_AddText("alias startmap_sp \"map nehstart\"\nalias startmap_dm \"map nehstart\"\nexec quake.rc\n");
1111         else if (gamemode == GAME_TRANSFUSION)
1112                 Cbuf_AddText("alias startmap_sp \"map e1m1\"\n""alias startmap_dm \"map bb1\"\nexec quake.rc\n");
1113         else if (gamemode == GAME_TEU)
1114                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec teu.rc\n");
1115         else
1116                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec quake.rc\n");
1117         Cbuf_Execute();
1118
1119         // if stuffcmds wasn't run, then quake.rc is probably missing, use default
1120         if (!host_stuffcmdsrun)
1121         {
1122                 Cbuf_AddText("exec default.cfg\nexec config.cfg\nexec autoexec.cfg\nstuffcmds\n");
1123                 Cbuf_Execute();
1124         }
1125
1126         // put up the loading image so the user doesn't stare at a black screen...
1127         SCR_BeginLoadingPlaque();
1128
1129         // FIXME: put this into some neat design, but the menu should be allowed to crash
1130         // without crashing the whole game, so this should just be a short-time solution
1131
1132         // here comes the not so critical stuff
1133         if (setjmp(host_abortframe)) {
1134                 return;
1135         }
1136
1137         if (cls.state != ca_dedicated)
1138         {
1139                 MR_Init();
1140         }
1141
1142         // check for special benchmark mode
1143 // 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)
1144         i = COM_CheckParm("-benchmark");
1145         if (i && i + 1 < com_argc)
1146         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1147         {
1148                 Cbuf_AddText(va("timedemo %s\n", com_argv[i + 1]));
1149                 Cbuf_Execute();
1150         }
1151
1152         // check for special demo mode
1153 // COMMANDLINEOPTION: Client: -demo <demoname> runs a playdemo and quits
1154         i = COM_CheckParm("-demo");
1155         if (i && i + 1 < com_argc)
1156         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1157         {
1158                 Cbuf_AddText(va("playdemo %s\n", com_argv[i + 1]));
1159                 Cbuf_Execute();
1160         }
1161
1162 // COMMANDLINEOPTION: Client: -capturedemo <demoname> captures a playdemo and quits
1163         i = COM_CheckParm("-capturedemo");
1164         if (i && i + 1 < com_argc)
1165         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1166         {
1167                 Cbuf_AddText(va("playdemo %s\ncl_capturevideo 1\n", com_argv[i + 1]));
1168                 Cbuf_Execute();
1169         }
1170
1171         if (cls.state == ca_dedicated || COM_CheckParm("-listen"))
1172         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1173         {
1174                 Cbuf_AddText("startmap_dm\n");
1175                 Cbuf_Execute();
1176         }
1177
1178         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1179         {
1180                 Cbuf_AddText("togglemenu\n");
1181                 Cbuf_Execute();
1182         }
1183
1184         Con_DPrint("========Initialized=========\n");
1185
1186         //Host_StartVideo();
1187 }
1188
1189
1190 /*
1191 ===============
1192 Host_Shutdown
1193
1194 FIXME: this is a callback from Sys_Quit and Sys_Error.  It would be better
1195 to run quit through here before the final handoff to the sys code.
1196 ===============
1197 */
1198 void Host_Shutdown(void)
1199 {
1200         static qboolean isdown = false;
1201
1202         if (isdown)
1203         {
1204                 Con_Print("recursive shutdown\n");
1205                 return;
1206         }
1207         if (setjmp(host_abortframe))
1208         {
1209                 Con_Print("aborted the quitting frame?!?\n");
1210                 return;
1211         }
1212         isdown = true;
1213
1214         // be quiet while shutting down
1215         S_StopAllSounds();
1216
1217         // disconnect client from server if active
1218         CL_Disconnect();
1219
1220         // shut down local server if active
1221         Host_ShutdownServer ();
1222
1223         // Shutdown menu
1224         if(MR_Shutdown)
1225                 MR_Shutdown();
1226
1227         // AK shutdown PRVM
1228         // AK hmm, no PRVM_Shutdown(); yet
1229
1230         CL_Gecko_Shutdown();
1231         CL_Video_Shutdown();
1232
1233         Host_SaveConfig();
1234
1235         CDAudio_Shutdown ();
1236         S_Terminate ();
1237         Curl_Shutdown ();
1238         NetConn_Shutdown ();
1239         //PR_Shutdown ();
1240
1241         if (cls.state != ca_dedicated)
1242         {
1243                 R_Modules_Shutdown();
1244                 VID_Shutdown();
1245         }
1246
1247         Cmd_Shutdown();
1248         Key_Shutdown();
1249         CL_Shutdown();
1250         Sys_Shutdown();
1251         Log_Close();
1252         FS_Shutdown();
1253         Con_Shutdown();
1254         Memory_Shutdown();
1255 }
1256