quakeforge/nq/source/cl_demo.c

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/*
cl_demo.c
@description@
Copyright (C) 1996-1997 Id Software, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
$Id$
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include "QF/qendian.h"
#include "QF/va.h"
#include "host.h"
#include "QF/msg.h"
#include "client.h"
#include "compat.h"
#include "QF/sys.h"
#include "QF/console.h"
#include "QF/cmd.h"
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#include "QF/keys.h"
void CL_FinishTimeDemo (void);
/*
DEMO CODE
When a demo is playing back, all NET_SendMessages are skipped, and
NET_GetMessages are read from the demo file.
Whenever cl.time gets past the last received message, another message is
read from the demo file.
*/
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/*
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CL_StopPlayback
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Called when a demo file runs out, or the user starts a game
*/
void
CL_StopPlayback (void)
{
if (!cls.demoplayback)
return;
Qclose (cls.demofile);
cls.demoplayback = false;
cls.demofile = NULL;
cls.state = ca_disconnected;
if (cls.timedemo)
CL_FinishTimeDemo ();
}
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/*
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CL_WriteDemoMessage
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Dumps the current net message, prefixed by the length and view angles
*/
void
CL_WriteDemoMessage (void)
{
int len;
int i;
float f;
len = LittleLong (net_message->message->cursize);
Qwrite (cls.demofile, &len, 4);
for (i = 0; i < 3; i++) {
f = LittleFloat (cl.viewangles[i]);
Qwrite (cls.demofile, &f, 4);
}
Qwrite (cls.demofile, net_message->message->data,
net_message->message->cursize);
Qflush (cls.demofile);
}
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/*
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CL_GetMessage
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Handles recording and playback of demos, on top of NET_ code
*/
int
CL_GetMessage (void)
{
int r, i;
float f;
if (cls.demoplayback) {
// decide if it is time to grab the next message
if (cls.signon == SIGNONS) // always grab until fully connected
{
if (cls.timedemo) {
if (host_framecount == cls.td_lastframe)
return 0; // already read this frame's message
cls.td_lastframe = host_framecount;
// if this is the second frame, grab the real td_starttime
// so the bogus time on the first frame doesn't count
if (host_framecount == cls.td_startframe + 1)
cls.td_starttime = realtime;
} else if ( /* cl.time > 0 && */ cl.time <= cl.mtime[0]) {
return 0; // don't need another message yet
}
}
// get the next message
Qread (cls.demofile, &net_message->message->cursize, 4);
VectorCopy (cl.mviewangles[0], cl.mviewangles[1]);
for (i = 0; i < 3; i++) {
r = Qread (cls.demofile, &f, 4);
cl.mviewangles[0][i] = LittleFloat (f);
}
net_message->message->cursize =
LittleLong (net_message->message->cursize);
if (net_message->message->cursize > MAX_MSGLEN)
Sys_Error ("Demo message > MAX_MSGLEN");
r =
Qread (cls.demofile, net_message->message->data,
net_message->message->cursize);
if (r != net_message->message->cursize) {
CL_StopPlayback ();
return 0;
}
return 1;
}
while (1) {
r = NET_GetMessage (cls.netcon);
if (r != 1 && r != 2)
return r;
// discard nop keepalive message
if (net_message->message->cursize == 1
&& net_message->message->data[0] == svc_nop)
Con_Printf ("<-- server to client keepalive\n");
else
break;
}
if (cls.demorecording)
CL_WriteDemoMessage ();
return r;
}
/*
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CL_Stop_f
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stop recording a demo
*/
void
CL_Stop_f (void)
{
if (cmd_source != src_command)
return;
if (!cls.demorecording) {
Con_Printf ("Not recording a demo.\n");
return;
}
// write a disconnect message to the demo file
SZ_Clear (net_message->message);
MSG_WriteByte (net_message->message, svc_disconnect);
CL_WriteDemoMessage ();
// finish up
Qclose (cls.demofile);
cls.demofile = NULL;
cls.demorecording = false;
Con_Printf ("Completed demo\n");
}
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/*
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CL_Record_f
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record <demoname> <map> [cd track]
*/
void
CL_Record_f (void)
{
int c;
char name[MAX_OSPATH];
int track;
if (cmd_source != src_command)
return;
c = Cmd_Argc ();
if (c != 2 && c != 3 && c != 4) {
Con_Printf ("record <demoname> [<map> [cd track]]\n");
return;
}
if (strstr (Cmd_Argv (1), "..")) {
Con_Printf ("Relative pathnames are not allowed.\n");
return;
}
if (c == 2 && cls.state == ca_connected) {
Con_Printf
("Can not record - already connected to server\nClient demo recording must be started before connecting\n");
return;
}
// write the forced cd track number, or -1
if (c == 4) {
track = atoi (Cmd_Argv (3));
Con_Printf ("Forcing CD track to %i\n", cls.forcetrack);
} else
track = -1;
snprintf (name, sizeof (name), "%s/%s", com_gamedir, Cmd_Argv (1));
// start the map up
//
if (c > 2)
Cmd_ExecuteString (va ("map %s", Cmd_Argv (2)), src_command);
// open the demo file
//
COM_DefaultExtension (name, ".dem");
Con_Printf ("recording to %s.\n", name);
cls.demofile = Qopen (name, "wb");
if (!cls.demofile) {
Con_Printf ("ERROR: couldn't open.\n");
return;
}
cls.forcetrack = track;
Qprintf (cls.demofile, "%i\n", cls.forcetrack);
cls.demorecording = true;
}
/*
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CL_PlayDemo_f
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play [demoname]
*/
void
CL_PlayDemo_f (void)
{
char name[256];
int c;
qboolean neg = false;
if (cmd_source != src_command)
return;
if (Cmd_Argc () != 2) {
Con_Printf ("play <demoname> : plays a demo\n");
return;
}
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// disconnect from server
//
CL_Disconnect ();
// open the demo file
//
strcpy (name, Cmd_Argv (1));
COM_DefaultExtension (name, ".dem");
Con_Printf ("Playing demo from %s.\n", name);
COM_FOpenFile (name, &cls.demofile);
if (!cls.demofile) {
Con_Printf ("ERROR: couldn't open.\n");
cls.demonum = -1; // stop demo loop
return;
}
cls.demoplayback = true;
cls.state = ca_connected;
cls.forcetrack = 0;
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key_dest = key_game;
game_target = KGT_DEFAULT;
while ((c = Qgetc (cls.demofile)) != '\n')
if (c == '-')
neg = true;
else
cls.forcetrack = cls.forcetrack * 10 + (c - '0');
if (neg)
cls.forcetrack = -cls.forcetrack;
// ZOID, fscanf is evil
// fscanf (cls.demofile, "%i\n", &cls.forcetrack);
}
void
CL_FinishTimeDemo (void)
{
int frames;
float time;
cls.timedemo = false;
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// the first frame didn't count
frames = (host_framecount - cls.td_startframe) - 1;
time = realtime - cls.td_starttime;
if (!time)
time = 1;
Con_Printf ("%i frames %5.1f seconds %5.1f fps\n", frames, time,
frames / time);
}
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/*
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CL_TimeDemo_f
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timedemo [demoname]
*/
void
CL_TimeDemo_f (void)
{
if (cmd_source != src_command)
return;
if (Cmd_Argc () != 2) {
Con_Printf ("timedemo <demoname> : gets demo speeds\n");
return;
}
CL_PlayDemo_f ();
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// cls.td_starttime will be grabbed at the second frame of the demo, so
// all the loading time doesn't get counted
cls.timedemo = true;
cls.td_startframe = host_framecount;
cls.td_lastframe = -1; // get a new message this frame
}