added cl_minfps_qualitypower cvar to make particle quality drop more
[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 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"};
63 cvar_t cl_minfps_fade = {CVAR_SAVE, "cl_minfps_fade", "0.2", "how fast the quality adapts to varying framerate"};
64 cvar_t cl_minfps_qualitymax = {CVAR_SAVE, "cl_minfps_qualitymax", "1", "highest allowed drawdistance multiplier"};
65 cvar_t cl_minfps_qualitymin = {CVAR_SAVE, "cl_minfps_qualitymin", "0.25", "lowest allowed drawdistance multiplier"};
66 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"};
67 cvar_t cl_minfps_qualityscale = {CVAR_SAVE, "cl_minfps_qualityscale", "0.5", "multiplier for quality"};
68 cvar_t cl_maxfps = {CVAR_SAVE, "cl_maxfps", "1000000", "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)"};
69 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"};
70
71 cvar_t developer = {0, "developer","0", "prints additional debugging messages and information (recommended for modders and level designers)"};
72 cvar_t developer_entityparsing = {0, "developer_entityparsing", "0", "prints detailed network entities information each time a packet is received"};
73
74 cvar_t timestamps = {CVAR_SAVE, "timestamps", "0", "prints timestamps on console messages"};
75 cvar_t timeformat = {CVAR_SAVE, "timeformat", "[%Y-%m-%d %H:%M:%S] ", "time format to use on timestamped console messages"};
76
77 /*
78 ================
79 Host_AbortCurrentFrame
80
81 aborts the current host frame and goes on with the next one
82 ================
83 */
84 void Host_AbortCurrentFrame(void)
85 {
86         longjmp (host_abortframe, 1);
87 }
88
89 /*
90 ================
91 Host_Error
92
93 This shuts down both the client and server
94 ================
95 */
96 void Host_Error (const char *error, ...)
97 {
98         static char hosterrorstring1[MAX_INPUTLINE];
99         static char hosterrorstring2[MAX_INPUTLINE];
100         static qboolean hosterror = false;
101         va_list argptr;
102
103         // turn off rcon redirect if it was active when the crash occurred
104         rcon_redirect = false;
105
106         va_start (argptr,error);
107         dpvsnprintf (hosterrorstring1,sizeof(hosterrorstring1),error,argptr);
108         va_end (argptr);
109
110         Con_Printf("Host_Error: %s\n", hosterrorstring1);
111
112         // LordHavoc: if crashing very early, or currently shutting down, do
113         // Sys_Error instead
114         if (host_framecount < 3 || host_shuttingdown)
115                 Sys_Error ("Host_Error: %s", hosterrorstring1);
116
117         if (hosterror)
118                 Sys_Error ("Host_Error: recursively entered (original error was: %s    new error is: %s)", hosterrorstring2, hosterrorstring1);
119         hosterror = true;
120
121         strlcpy(hosterrorstring2, hosterrorstring1, sizeof(hosterrorstring2));
122
123         CL_Parse_DumpPacket();
124
125         CL_Parse_ErrorCleanUp();
126
127         //PR_Crash();
128
129         // print out where the crash happened, if it was caused by QC (and do a cleanup)
130         PRVM_Crash();
131
132
133         Host_ShutdownServer ();
134
135         if (cls.state == ca_dedicated)
136                 Sys_Error ("Host_Error: %s",hosterrorstring2);  // dedicated servers exit
137
138         CL_Disconnect ();
139         cls.demonum = -1;
140
141         hosterror = false;
142
143         Host_AbortCurrentFrame();
144 }
145
146 void Host_ServerOptions (void)
147 {
148         int i;
149
150         // general default
151         svs.maxclients = 8;
152
153 // COMMANDLINEOPTION: Server: -dedicated [playerlimit] starts a dedicated server (with a command console), default playerlimit is 8
154 // COMMANDLINEOPTION: Server: -listen [playerlimit] starts a multiplayer server with graphical client, like singleplayer but other players can connect, default playerlimit is 8
155         // if no client is in the executable or -dedicated is specified on
156         // commandline, start a dedicated server
157         i = COM_CheckParm ("-dedicated");
158         if (i || !cl_available)
159         {
160                 cls.state = ca_dedicated;
161                 // check for -dedicated specifying how many players
162                 if (i && i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
163                         svs.maxclients = atoi (com_argv[i+1]);
164                 if (COM_CheckParm ("-listen"))
165                         Con_Printf ("Only one of -dedicated or -listen can be specified\n");
166                 // default sv_public on for dedicated servers (often hosted by serious administrators), off for listen servers (often hosted by clueless users)
167                 Cvar_SetValue("sv_public", 1);
168         }
169         else if (cl_available)
170         {
171                 // client exists and not dedicated, check if -listen is specified
172                 cls.state = ca_disconnected;
173                 i = COM_CheckParm ("-listen");
174                 if (i)
175                 {
176                         // default players unless specified
177                         if (i + 1 < com_argc && atoi (com_argv[i+1]) >= 1)
178                                 svs.maxclients = atoi (com_argv[i+1]);
179                 }
180                 else
181                 {
182                         // default players in some games, singleplayer in most
183                         if (gamemode != GAME_GOODVSBAD2 && gamemode != GAME_NEXUIZ && gamemode != GAME_BATTLEMECH)
184                                 svs.maxclients = 1;
185                 }
186         }
187
188         svs.maxclients = bound(1, svs.maxclients, MAX_SCOREBOARD);
189
190         svs.clients = (client_t *)Mem_Alloc(sv_mempool, sizeof(client_t) * svs.maxclients);
191
192         if (svs.maxclients > 1 && !deathmatch.integer && !coop.integer)
193                 Cvar_SetValueQuick(&deathmatch, 1);
194 }
195
196 /*
197 =======================
198 Host_InitLocal
199 ======================
200 */
201 void Host_SaveConfig_f(void);
202 void Host_LoadConfig_f(void);
203 static void Host_InitLocal (void)
204 {
205         Cmd_AddCommand("saveconfig", Host_SaveConfig_f, "save settings to config.cfg (or a specified filename) immediately (also automatic when quitting)");
206         Cmd_AddCommand("loadconfig", Host_LoadConfig_f, "reset everything and reload configs");
207
208         Cvar_RegisterVariable (&host_framerate);
209         Cvar_RegisterVariable (&host_speeds);
210         Cvar_RegisterVariable (&cl_minfps);
211         Cvar_RegisterVariable (&cl_minfps_fade);
212         Cvar_RegisterVariable (&cl_minfps_qualitymax);
213         Cvar_RegisterVariable (&cl_minfps_qualitymin);
214         Cvar_RegisterVariable (&cl_minfps_qualitypower);
215         Cvar_RegisterVariable (&cl_minfps_qualityscale);
216         Cvar_RegisterVariable (&cl_maxfps);
217         Cvar_RegisterVariable (&cl_maxidlefps);
218
219         Cvar_RegisterVariable (&developer);
220         Cvar_RegisterVariable (&developer_entityparsing);
221
222         Cvar_RegisterVariable (&timestamps);
223         Cvar_RegisterVariable (&timeformat);
224 }
225
226
227 /*
228 ===============
229 Host_SaveConfig_f
230
231 Writes key bindings and archived cvars to config.cfg
232 ===============
233 */
234 void Host_SaveConfig_to(const char *file)
235 {
236         qfile_t *f;
237
238 // dedicated servers initialize the host but don't parse and set the
239 // config.cfg cvars
240         // LordHavoc: don't save a config if it crashed in startup
241         if (host_framecount >= 3 && cls.state != ca_dedicated && !COM_CheckParm("-benchmark") && !COM_CheckParm("-capturedemo"))
242         {
243                 f = FS_Open (file, "wb", false, false);
244                 if (!f)
245                 {
246                         Con_Printf("Couldn't write %s.\n", file);
247                         return;
248                 }
249
250                 Key_WriteBindings (f);
251                 Cvar_WriteVariables (f);
252
253                 FS_Close (f);
254         }
255 }
256 void Host_SaveConfig(void)
257 {
258         Host_SaveConfig_to("config.cfg");
259 }
260 void Host_SaveConfig_f(void)
261 {
262         const char *file = "config.cfg";
263
264         if(Cmd_Argc() >= 2) {
265                 file = Cmd_Argv(1);
266                 Con_Printf("Saving to %s\n", file);
267         }
268
269         Host_SaveConfig_to(file);
270 }
271
272 /*
273 ===============
274 Host_LoadConfig_f
275
276 Resets key bindings and cvars to defaults and then reloads scripts
277 ===============
278 */
279 void Host_LoadConfig_f(void)
280 {
281         // unlock the cvar default strings so they can be updated by the new default.cfg
282         Cvar_UnlockDefaults();
283         // reset cvars to their defaults, and then exec startup scripts again
284         Cbuf_InsertText("cvar_resettodefaults_all;exec quake.rc\n");
285 }
286
287 /*
288 =================
289 SV_ClientPrint
290
291 Sends text across to be displayed
292 FIXME: make this just a stuffed echo?
293 =================
294 */
295 void SV_ClientPrint(const char *msg)
296 {
297         if (host_client->netconnection)
298         {
299                 MSG_WriteByte(&host_client->netconnection->message, svc_print);
300                 MSG_WriteString(&host_client->netconnection->message, msg);
301         }
302 }
303
304 /*
305 =================
306 SV_ClientPrintf
307
308 Sends text across to be displayed
309 FIXME: make this just a stuffed echo?
310 =================
311 */
312 void SV_ClientPrintf(const char *fmt, ...)
313 {
314         va_list argptr;
315         char msg[MAX_INPUTLINE];
316
317         va_start(argptr,fmt);
318         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
319         va_end(argptr);
320
321         SV_ClientPrint(msg);
322 }
323
324 /*
325 =================
326 SV_BroadcastPrint
327
328 Sends text to all active clients
329 =================
330 */
331 void SV_BroadcastPrint(const char *msg)
332 {
333         int i;
334         client_t *client;
335
336         for (i = 0, client = svs.clients;i < svs.maxclients;i++, client++)
337         {
338                 if (client->active && client->netconnection)
339                 {
340                         MSG_WriteByte(&client->netconnection->message, svc_print);
341                         MSG_WriteString(&client->netconnection->message, msg);
342                 }
343         }
344
345         if (sv_echobprint.integer && cls.state == ca_dedicated)
346                 Con_Print(msg);
347 }
348
349 /*
350 =================
351 SV_BroadcastPrintf
352
353 Sends text to all active clients
354 =================
355 */
356 void SV_BroadcastPrintf(const char *fmt, ...)
357 {
358         va_list argptr;
359         char msg[MAX_INPUTLINE];
360
361         va_start(argptr,fmt);
362         dpvsnprintf(msg,sizeof(msg),fmt,argptr);
363         va_end(argptr);
364
365         SV_BroadcastPrint(msg);
366 }
367
368 /*
369 =================
370 Host_ClientCommands
371
372 Send text over to the client to be executed
373 =================
374 */
375 void Host_ClientCommands(const char *fmt, ...)
376 {
377         va_list argptr;
378         char string[MAX_INPUTLINE];
379
380         if (!host_client->netconnection)
381                 return;
382
383         va_start(argptr,fmt);
384         dpvsnprintf(string, sizeof(string), fmt, argptr);
385         va_end(argptr);
386
387         MSG_WriteByte(&host_client->netconnection->message, svc_stufftext);
388         MSG_WriteString(&host_client->netconnection->message, string);
389 }
390
391 /*
392 =====================
393 SV_DropClient
394
395 Called when the player is getting totally kicked off the host
396 if (crash = true), don't bother sending signofs
397 =====================
398 */
399 void SV_DropClient(qboolean crash)
400 {
401         int i;
402         Con_Printf("Client \"%s\" dropped\n", host_client->name);
403
404         SV_StopDemoRecording(host_client);
405
406         // make sure edict is not corrupt (from a level change for example)
407         host_client->edict = PRVM_EDICT_NUM(host_client - svs.clients + 1);
408
409         if (host_client->netconnection)
410         {
411                 // free the client (the body stays around)
412                 if (!crash)
413                 {
414                         // LordHavoc: no opportunity for resending, so use unreliable 3 times
415                         unsigned char bufdata[8];
416                         sizebuf_t buf;
417                         memset(&buf, 0, sizeof(buf));
418                         buf.data = bufdata;
419                         buf.maxsize = sizeof(bufdata);
420                         MSG_WriteByte(&buf, svc_disconnect);
421                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
422                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
423                         NetConn_SendUnreliableMessage(host_client->netconnection, &buf, sv.protocol, 10000, false);
424                 }
425                 // break the net connection
426                 NetConn_Close(host_client->netconnection);
427                 host_client->netconnection = NULL;
428         }
429
430         // call qc ClientDisconnect function
431         // LordHavoc: don't call QC if server is dead (avoids recursive
432         // Host_Error in some mods when they run out of edicts)
433         if (host_client->clientconnectcalled && sv.active && host_client->edict)
434         {
435                 // call the prog function for removing a client
436                 // this will set the body to a dead frame, among other things
437                 int saveSelf = prog->globals.server->self;
438                 host_client->clientconnectcalled = false;
439                 prog->globals.server->self = PRVM_EDICT_TO_PROG(host_client->edict);
440                 PRVM_ExecuteProgram(prog->globals.server->ClientDisconnect, "QC function ClientDisconnect is missing");
441                 prog->globals.server->self = saveSelf;
442         }
443
444         // if a download is active, close it
445         if (host_client->download_file)
446         {
447                 Con_DPrintf("Download of %s aborted when %s dropped\n", host_client->download_name, host_client->name);
448                 FS_Close(host_client->download_file);
449                 host_client->download_file = NULL;
450                 host_client->download_name[0] = 0;
451                 host_client->download_expectedposition = 0;
452                 host_client->download_started = false;
453         }
454
455         // remove leaving player from scoreboard
456         host_client->name[0] = 0;
457         host_client->colors = 0;
458         host_client->frags = 0;
459         // send notification to all clients
460         // get number of client manually just to make sure we get it right...
461         i = host_client - svs.clients;
462         MSG_WriteByte (&sv.reliable_datagram, svc_updatename);
463         MSG_WriteByte (&sv.reliable_datagram, i);
464         MSG_WriteString (&sv.reliable_datagram, host_client->name);
465         MSG_WriteByte (&sv.reliable_datagram, svc_updatecolors);
466         MSG_WriteByte (&sv.reliable_datagram, i);
467         MSG_WriteByte (&sv.reliable_datagram, host_client->colors);
468         MSG_WriteByte (&sv.reliable_datagram, svc_updatefrags);
469         MSG_WriteByte (&sv.reliable_datagram, i);
470         MSG_WriteShort (&sv.reliable_datagram, host_client->frags);
471
472         // free the client now
473         if (host_client->entitydatabase)
474                 EntityFrame_FreeDatabase(host_client->entitydatabase);
475         if (host_client->entitydatabase4)
476                 EntityFrame4_FreeDatabase(host_client->entitydatabase4);
477         if (host_client->entitydatabase5)
478                 EntityFrame5_FreeDatabase(host_client->entitydatabase5);
479
480         if (sv.active)
481         {
482                 // clear a fields that matter to DP_SV_CLIENTNAME and DP_SV_CLIENTCOLORS, and also frags
483                 PRVM_ED_ClearEdict(host_client->edict);
484         }
485
486         // clear the client struct (this sets active to false)
487         memset(host_client, 0, sizeof(*host_client));
488
489         // update server listing on the master because player count changed
490         // (which the master uses for filtering empty/full servers)
491         NetConn_Heartbeat(1);
492
493         if (sv.loadgame)
494         {
495                 for (i = 0;i < svs.maxclients;i++)
496                         if (svs.clients[i].active && !svs.clients[i].spawned)
497                                 break;
498                 if (i == svs.maxclients)
499                 {
500                         Con_Printf("Loaded game, everyone rejoined - unpausing\n");
501                         sv.paused = sv.loadgame = false; // we're basically done with loading now
502                 }
503         }
504 }
505
506 /*
507 ==================
508 Host_ShutdownServer
509
510 This only happens at the end of a game, not between levels
511 ==================
512 */
513 void Host_ShutdownServer(void)
514 {
515         int i;
516
517         Con_DPrintf("Host_ShutdownServer\n");
518
519         if (!sv.active)
520                 return;
521
522         NetConn_Heartbeat(2);
523         NetConn_Heartbeat(2);
524
525 // make sure all the clients know we're disconnecting
526         SV_VM_Begin();
527         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
528                 if (host_client->active)
529                         SV_DropClient(false); // server shutdown
530         if(prog->loaded)
531                 if(prog->funcoffsets.SV_Shutdown)
532                 {
533                         func_t s = prog->funcoffsets.SV_Shutdown;
534                         prog->funcoffsets.SV_Shutdown = 0; // prevent it from getting called again
535                         PRVM_ExecuteProgram(s,"SV_Shutdown() required");
536                 }
537         SV_VM_End();
538
539         NetConn_CloseServerPorts();
540
541         sv.active = false;
542 //
543 // clear structures
544 //
545         memset(&sv, 0, sizeof(sv));
546         memset(svs.clients, 0, svs.maxclients*sizeof(client_t));
547 }
548
549
550 //============================================================================
551
552 /*
553 ===================
554 Host_GetConsoleCommands
555
556 Add them exactly as if they had been typed at the console
557 ===================
558 */
559 void Host_GetConsoleCommands (void)
560 {
561         char *cmd;
562
563         while (1)
564         {
565                 cmd = Sys_ConsoleInput ();
566                 if (!cmd)
567                         break;
568                 Cbuf_AddText (cmd);
569         }
570 }
571
572 /*
573 ==================
574 Host_TimeReport
575
576 Returns a time report string, for example for
577 ==================
578 */
579 const char *Host_TimingReport()
580 {
581         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);
582 }
583
584 /*
585 ==================
586 Host_Frame
587
588 Runs all active servers
589 ==================
590 */
591 static void Host_Init(void);
592 void Host_Main(void)
593 {
594         double time1 = 0;
595         double time2 = 0;
596         double time3 = 0;
597         double cl_timer, sv_timer;
598         double clframetime, deltarealtime, oldrealtime;
599         double wait;
600         int pass1, pass2, pass3, i;
601
602         Host_Init();
603
604         cl_timer = 0;
605         sv_timer = 0;
606
607         realtime = Sys_DoubleTime();
608         for (;;)
609         {
610                 if (setjmp(host_abortframe))
611                         continue;                       // something bad happened, or the server disconnected
612
613                 oldrealtime = realtime;
614                 realtime = Sys_DoubleTime();
615
616                 deltarealtime = realtime - oldrealtime;
617                 cl_timer += deltarealtime;
618                 sv_timer += deltarealtime;
619
620                 svs.perf_acc_realtime += deltarealtime;
621
622                 // Look for clients who have spawned
623                 for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
624                         if(host_client->spawned)
625                                 if(host_client->netconnection)
626                                         break;
627                 if(i == svs.maxclients)
628                 {
629                         // Nobody is looking? Then we won't do timing...
630                         // Instead, reset it to zero
631                         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;
632                 }
633                 else if(svs.perf_acc_realtime > 5)
634                 {
635                         svs.perf_cpuload = 1 - svs.perf_acc_sleeptime / svs.perf_acc_realtime;
636                         svs.perf_lost = svs.perf_acc_lost / svs.perf_acc_realtime;
637                         if(svs.perf_acc_offset_samples > 0)
638                         {
639                                 svs.perf_offset_max = svs.perf_acc_offset_max;
640                                 svs.perf_offset_avg = svs.perf_acc_offset / svs.perf_acc_offset_samples;
641                                 svs.perf_offset_sdev = sqrt(svs.perf_acc_offset_squared / svs.perf_acc_offset_samples - svs.perf_offset_avg * svs.perf_offset_avg);
642                         }
643                         if(svs.perf_lost > 0)
644                                 Con_DPrintf("Server can't keep up: %s\n", Host_TimingReport());
645                         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;
646                 }
647
648                 if (slowmo.value < 0.00001 && slowmo.value != 0)
649                         Cvar_SetValue("slowmo", 0);
650                 if (host_framerate.value < 0.00001 && host_framerate.value != 0)
651                         Cvar_SetValue("host_framerate", 0);
652
653                 // keep the random time dependent, but not when playing demos/benchmarking
654                 if(!*sv_random_seed.string && !cls.demoplayback)
655                         rand();
656
657                 cl.islocalgame = NetConn_IsLocalGame();
658
659                 // get new key events
660                 Sys_SendKeyEvents();
661
662                 NetConn_UpdateSockets();
663
664                 Log_DestBuffer_Flush();
665
666                 // receive packets on each main loop iteration, as the main loop may
667                 // be undersleeping due to select() detecting a new packet
668                 if (sv.active)
669                         NetConn_ServerFrame();
670
671                 Curl_Run();
672
673                 // check for commands typed to the host
674                 Host_GetConsoleCommands();
675
676                 // when a server is running we only execute console commands on server frames
677                 // (this mainly allows frikbot .way config files to work properly by staying in sync with the server qc)
678                 // otherwise we execute them on all frames
679                 if (sv_timer > 0 || !sv.active)
680                 {
681                         // process console commands
682                         Cbuf_Execute();
683                 }
684
685                 //Con_Printf("%6.0f %6.0f\n", cl_timer * 1000000.0, sv_timer * 1000000.0);
686
687                 // if the accumulators haven't become positive yet, wait a while
688                 if (cls.state == ca_dedicated)
689                         wait = sv_timer * -1000000.0;
690                 else if (!sv.active)
691                         wait = cl_timer * -1000000.0;
692                 else
693                         wait = max(cl_timer, sv_timer) * -1000000.0;
694                 if (wait > 100000)
695                         wait = 100000;
696
697                 if (!cls.timedemo && wait > 0)
698                 {
699                         double time0 = Sys_DoubleTime();
700                         if (sv_checkforpacketsduringsleep.integer)
701                         {
702                                 if (wait >= 1)
703                                         NetConn_SleepMicroseconds((int)wait);
704                         }
705                         else
706                         {
707                                 if (wait >= 1000)
708                                         Sys_Sleep((int)wait / 1000);
709                         }
710                         svs.perf_acc_sleeptime += Sys_DoubleTime() - time0;
711                         continue;
712                 }
713
714         //-------------------
715         //
716         // server operations
717         //
718         //-------------------
719
720                 // limit the frametime steps to no more than 100ms each
721                 if (cl_timer > 0.1)
722                         cl_timer = 0.1;
723                 if (sv_timer > 0.1)
724                 {
725                         svs.perf_acc_lost += (sv_timer - 0.1);
726                         sv_timer = 0.1;
727                 }
728
729                 if (sv.active && sv_timer > 0)
730                 {
731                         // execute one or more server frames, with an upper limit on how much
732                         // execution time to spend on server frames to avoid freezing the game if
733                         // the server is overloaded, this execution time limit means the game will
734                         // slow down if the server is taking too long.
735                         int framecount, framelimit = 1;
736                         double advancetime, aborttime = 0;
737                         float offset;
738
739                         // run the world state
740                         // don't allow simulation to run too fast or too slow or logic glitches can occur
741
742                         // stop running server frames if the wall time reaches this value
743                         if (sys_ticrate.value <= 0)
744                                 advancetime = sv_timer;
745                         else if (cl.islocalgame && !sv_fixedframeratesingleplayer.integer)
746                         {
747                                 // synchronize to the client frametime, but no less than 10ms and no more than sys_ticrate
748                                 advancetime = bound(0.01, cl_timer, sys_ticrate.value);
749                                 framelimit = 10;
750                                 aborttime = realtime + 0.1;
751                         }
752                         else
753                         {
754                                 advancetime = sys_ticrate.value;
755                                 // listen servers can run multiple server frames per client frame
756                                 if (cls.state == ca_connected)
757                                 {
758                                         framelimit = 10;
759                                         aborttime = realtime + 0.1;
760                                 }
761                         }
762                         advancetime = min(advancetime, 0.1);
763
764                         if(advancetime > 0)
765                         {
766                                 offset = sv_timer + (Sys_DoubleTime() - realtime);
767                                 ++svs.perf_acc_offset_samples;
768                                 svs.perf_acc_offset += offset;
769                                 svs.perf_acc_offset_squared += offset * offset;
770                                 if(svs.perf_acc_offset_max < offset)
771                                         svs.perf_acc_offset_max = offset;
772                         }
773
774                         // only advance time if not paused
775                         // the game also pauses in singleplayer when menu or console is used
776                         sv.frametime = advancetime * slowmo.value;
777                         if (host_framerate.value)
778                                 sv.frametime = host_framerate.value;
779                         if (sv.paused || (cl.islocalgame && (key_dest != key_game || key_consoleactive)))
780                                 sv.frametime = 0;
781
782                         // setup the VM frame
783                         SV_VM_Begin();
784
785                         for (framecount = 0;framecount < framelimit && sv_timer > 0;framecount++)
786                         {
787                                 sv_timer -= advancetime;
788
789                                 // move things around and think unless paused
790                                 if (sv.frametime)
791                                         SV_Physics();
792
793                                 // if this server frame took too long, break out of the loop
794                                 if (framelimit > 1 && Sys_DoubleTime() >= aborttime)
795                                         break;
796                         }
797
798                         // send all messages to the clients
799                         SV_SendClientMessages();
800
801                         // end the server VM frame
802                         SV_VM_End();
803
804                         // send an heartbeat if enough time has passed since the last one
805                         NetConn_Heartbeat(0);
806                 }
807
808         //-------------------
809         //
810         // client operations
811         //
812         //-------------------
813
814                 if (cls.state != ca_dedicated && (cl_timer > 0 || cls.timedemo))
815                 {
816                         // decide the simulation time
817                         if (cls.capturevideo.active)
818                         {
819                                 if (cls.capturevideo.realtime)
820                                         clframetime = cl.realframetime = max(cl_timer, 1.0 / cls.capturevideo.framerate);
821                                 else
822                                 {
823                                         clframetime = 1.0 / cls.capturevideo.framerate;
824                                         cl.realframetime = max(cl_timer, clframetime);
825                                 }
826                         }
827                         else if (vid_activewindow)
828                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / max(5.0f, cl_maxfps.value));
829                         else
830                                 clframetime = cl.realframetime = max(cl_timer, 1.0 / max(5.0f, cl_maxidlefps.value));
831
832                         // apply slowmo scaling
833                         clframetime *= cl.movevars_timescale;
834                         // scale playback speed of demos by slowmo cvar
835                         if (cls.demoplayback)
836                         {
837                                 clframetime *= slowmo.value;
838                                 // if demo playback is paused, don't advance time at all
839                                 if (cls.demopaused)
840                                         clframetime = 0;
841                         }
842
843                         // host_framerate overrides all else
844                         if (host_framerate.value)
845                                 clframetime = host_framerate.value;
846
847                         if (cls.timedemo)
848                                 clframetime = cl.realframetime = cl_timer;
849
850                         // deduct the frame time from the accumulator
851                         cl_timer -= cl.realframetime;
852
853                         cl.oldtime = cl.time;
854                         cl.time += clframetime;
855
856                         // Collect input into cmd
857                         CL_Input();
858
859                         // check for new packets
860                         NetConn_ClientFrame();
861
862                         // read a new frame from a demo if needed
863                         CL_ReadDemoMessage();
864
865                         // now that packets have been read, send input to server
866                         CL_SendMove();
867
868                         // update client world (interpolate entities, create trails, etc)
869                         CL_UpdateWorld();
870
871                         // update video
872                         if (host_speeds.integer)
873                                 time1 = Sys_DoubleTime();
874
875                         //ui_update();
876
877                         CL_Video_Frame();
878                         CL_Gecko_Frame();
879
880                         CL_UpdateScreen();
881
882                         if (host_speeds.integer)
883                                 time2 = Sys_DoubleTime();
884
885                         // update audio
886                         if(cl.csqc_usecsqclistener)
887                         {
888                                 S_Update(&cl.csqc_listenermatrix);
889                                 cl.csqc_usecsqclistener = false;
890                         }
891                         else
892                                 S_Update(&r_refdef.view.matrix);
893
894                         CDAudio_Update();
895
896                         if (host_speeds.integer)
897                         {
898                                 pass1 = (int)((time1 - time3)*1000000);
899                                 time3 = Sys_DoubleTime();
900                                 pass2 = (int)((time2 - time1)*1000000);
901                                 pass3 = (int)((time3 - time2)*1000000);
902                                 Con_Printf("%6ius total %6ius server %6ius gfx %6ius snd\n",
903                                                         pass1+pass2+pass3, pass1, pass2, pass3);
904                         }
905                 }
906
907                 // if there is some time remaining from this frame, reset the timers
908                 if (cl_timer >= 0)
909                         cl_timer = 0;
910                 if (sv_timer >= 0)
911                 {
912                         svs.perf_acc_lost += sv_timer;
913                         sv_timer = 0;
914                 }
915
916                 host_framecount++;
917         }
918 }
919
920 //============================================================================
921
922 qboolean vid_opened = false;
923 void Host_StartVideo(void)
924 {
925         if (!vid_opened && cls.state != ca_dedicated)
926         {
927                 vid_opened = true;
928                 VID_Start();
929                 CDAudio_Startup();
930         }
931 }
932
933 char engineversion[128];
934
935 qboolean sys_nostdout = false;
936
937 extern void Render_Init(void);
938 extern void Mathlib_Init(void);
939 extern void FS_Init(void);
940 extern void FS_Shutdown(void);
941 extern void PR_Cmd_Init(void);
942 extern void COM_Init_Commands(void);
943 extern void FS_Init_Commands(void);
944 extern qboolean host_stuffcmdsrun;
945
946 /*
947 ====================
948 Host_Init
949 ====================
950 */
951 static void Host_Init (void)
952 {
953         int i;
954         const char* os;
955
956         if (COM_CheckParm("-profilegameonly"))
957                 Sys_AllowProfiling(false);
958
959         // LordHavoc: quake never seeded the random number generator before... heh
960         if (COM_CheckParm("-benchmark"))
961                 srand(0); // predictable random sequence for -benchmark
962         else
963                 srand(time(NULL));
964
965         // FIXME: this is evil, but possibly temporary
966 // COMMANDLINEOPTION: Console: -developer enables warnings and other notices (RECOMMENDED for mod developers)
967         if (COM_CheckParm("-developer"))
968         {
969                 developer.value = developer.integer = 100;
970                 developer.string = "100";
971         }
972
973         if (COM_CheckParm("-developer2"))
974         {
975                 developer.value = developer.integer = 100;
976                 developer.string = "100";
977                 developer_memory.value = developer_memory.integer = 100;
978                 developer.string = "100";
979                 developer_memorydebug.value = developer_memorydebug.integer = 100;
980                 developer_memorydebug.string = "100";
981         }
982
983 // COMMANDLINEOPTION: Console: -nostdout disables text output to the terminal the game was launched from
984         if (COM_CheckParm("-nostdout"))
985                 sys_nostdout = 1;
986
987         // used by everything
988         Memory_Init();
989
990         // initialize console command/cvar/alias/command execution systems
991         Cmd_Init();
992
993         // initialize memory subsystem cvars/commands
994         Memory_Init_Commands();
995
996         // initialize console and logging and its cvars/commands
997         Con_Init();
998
999         // initialize various cvars that could not be initialized earlier
1000         Curl_Init_Commands();
1001         Cmd_Init_Commands();
1002         Sys_Init_Commands();
1003         COM_Init_Commands();
1004         FS_Init_Commands();
1005
1006         // initialize console window (only used by sys_win.c)
1007         Sys_InitConsole();
1008
1009         // detect gamemode from commandline options or executable name
1010         COM_InitGameType();
1011
1012         // construct a version string for the corner of the console
1013         os = DP_OS_NAME;
1014         dpsnprintf (engineversion, sizeof (engineversion), "%s %s %s", gamename, os, buildstring);
1015         Con_Printf("%s\n", engineversion);
1016
1017         // initialize ixtable
1018         Mathlib_Init();
1019
1020         // initialize filesystem (including fs_basedir, fs_gamedir, -game, scr_screenshot_name)
1021         FS_Init();
1022
1023         NetConn_Init();
1024         Curl_Init();
1025         //PR_Init();
1026         //PR_Cmd_Init();
1027         PRVM_Init();
1028         Mod_Init();
1029         World_Init();
1030         SV_Init();
1031         Host_InitCommands();
1032         Host_InitLocal();
1033         Host_ServerOptions();
1034
1035         if (cls.state != ca_dedicated)
1036         {
1037                 Con_Printf("Initializing client\n");
1038
1039                 R_Modules_Init();
1040                 Palette_Init();
1041                 MR_Init_Commands();
1042                 VID_Shared_Init();
1043                 VID_Init();
1044                 Render_Init();
1045                 S_Init();
1046                 CDAudio_Init();
1047                 Key_Init();
1048                 V_Init();
1049                 CL_Init();
1050         }
1051
1052         // set up the default startmap_sp and startmap_dm aliases (mods can
1053         // override these) and then execute the quake.rc startup script
1054         if (gamemode == GAME_NEHAHRA)
1055                 Cbuf_AddText("alias startmap_sp \"map nehstart\"\nalias startmap_dm \"map nehstart\"\nexec quake.rc\n");
1056         else if (gamemode == GAME_TRANSFUSION)
1057                 Cbuf_AddText("alias startmap_sp \"map e1m1\"\n""alias startmap_dm \"map bb1\"\nexec quake.rc\n");
1058         else if (gamemode == GAME_TEU)
1059                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec teu.rc\n");
1060         else
1061                 Cbuf_AddText("alias startmap_sp \"map start\"\nalias startmap_dm \"map start\"\nexec quake.rc\n");
1062         Cbuf_Execute();
1063
1064         // if stuffcmds wasn't run, then quake.rc is probably missing, use default
1065         if (!host_stuffcmdsrun)
1066         {
1067                 Cbuf_AddText("exec default.cfg\nexec config.cfg\nexec autoexec.cfg\nstuffcmds\n");
1068                 Cbuf_Execute();
1069         }
1070
1071         // put up the loading image so the user doesn't stare at a black screen...
1072         SCR_BeginLoadingPlaque();
1073
1074         // FIXME: put this into some neat design, but the menu should be allowed to crash
1075         // without crashing the whole game, so this should just be a short-time solution
1076
1077         // here comes the not so critical stuff
1078         if (setjmp(host_abortframe)) {
1079                 return;
1080         }
1081
1082         if (cls.state != ca_dedicated)
1083         {
1084                 MR_Init();
1085         }
1086
1087         // check for special benchmark mode
1088 // 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)
1089         i = COM_CheckParm("-benchmark");
1090         if (i && i + 1 < com_argc)
1091         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1092         {
1093                 Cbuf_AddText(va("timedemo %s\n", com_argv[i + 1]));
1094                 Cbuf_Execute();
1095         }
1096
1097         // check for special demo mode
1098 // COMMANDLINEOPTION: Client: -demo <demoname> runs a playdemo and quits
1099         i = COM_CheckParm("-demo");
1100         if (i && i + 1 < com_argc)
1101         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1102         {
1103                 Cbuf_AddText(va("playdemo %s\n", com_argv[i + 1]));
1104                 Cbuf_Execute();
1105         }
1106
1107 // COMMANDLINEOPTION: Client: -capturedemo <demoname> captures a playdemo and quits
1108         i = COM_CheckParm("-capturedemo");
1109         if (i && i + 1 < com_argc)
1110         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1111         {
1112                 Cbuf_AddText(va("playdemo %s\ncl_capturevideo 1\n", com_argv[i + 1]));
1113                 Cbuf_Execute();
1114         }
1115
1116         if (cls.state == ca_dedicated || COM_CheckParm("-listen"))
1117         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1118         {
1119                 Cbuf_AddText("startmap_dm\n");
1120                 Cbuf_Execute();
1121         }
1122
1123         if (!sv.active && !cls.demoplayback && !cls.connect_trying)
1124         {
1125                 Cbuf_AddText("togglemenu\n");
1126                 Cbuf_Execute();
1127         }
1128
1129         Con_DPrint("========Initialized=========\n");
1130
1131         //Host_StartVideo();
1132 }
1133
1134
1135 /*
1136 ===============
1137 Host_Shutdown
1138
1139 FIXME: this is a callback from Sys_Quit and Sys_Error.  It would be better
1140 to run quit through here before the final handoff to the sys code.
1141 ===============
1142 */
1143 void Host_Shutdown(void)
1144 {
1145         static qboolean isdown = false;
1146
1147         if (isdown)
1148         {
1149                 Con_Print("recursive shutdown\n");
1150                 return;
1151         }
1152         if (setjmp(host_abortframe))
1153         {
1154                 Con_Print("aborted the quitting frame?!?\n");
1155                 return;
1156         }
1157         isdown = true;
1158
1159         // be quiet while shutting down
1160         S_StopAllSounds();
1161
1162         // disconnect client from server if active
1163         CL_Disconnect();
1164
1165         // shut down local server if active
1166         Host_ShutdownServer ();
1167
1168         // Shutdown menu
1169         if(MR_Shutdown)
1170                 MR_Shutdown();
1171
1172         // AK shutdown PRVM
1173         // AK hmm, no PRVM_Shutdown(); yet
1174
1175         CL_Gecko_Shutdown();
1176         CL_Video_Shutdown();
1177
1178         Host_SaveConfig();
1179
1180         CDAudio_Shutdown ();
1181         S_Terminate ();
1182         Curl_Shutdown ();
1183         NetConn_Shutdown ();
1184         //PR_Shutdown ();
1185
1186         if (cls.state != ca_dedicated)
1187         {
1188                 R_Modules_Shutdown();
1189                 VID_Shutdown();
1190         }
1191
1192         Cmd_Shutdown();
1193         CL_Shutdown();
1194         Sys_Shutdown();
1195         Log_Close();
1196         FS_Shutdown();
1197         Memory_Shutdown();
1198 }
1199