ref: 2433bad34328371645a8c869c71d2c2cc9b46d72
dir: /cl_demo.c/
#include <u.h>
#include <libc.h>
#include <stdio.h>
#include "quakedef.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.
==============================================================================
*/
/*
==============
CL_StopPlayback
Called when a demo file runs out, or the user starts a game
==============
*/
void CL_StopPlayback (void)
{
if (!cls.demoplayback)
return;
fclose (cls.demofile);
cls.demoplayback = false;
cls.demofile = NULL;
cls.state = ca_disconnected;
if (cls.timedemo)
CL_FinishTimeDemo ();
}
/*
====================
CL_WriteDemoMessage
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.cursize);
fwrite (&len, 4, 1, cls.demofile);
for (i=0 ; i<3 ; i++)
{
f = LittleFloat (cl.viewangles[i]);
fwrite (&f, 4, 1, cls.demofile);
}
fwrite (net_message.data, net_message.cursize, 1, cls.demofile);
fflush (cls.demofile);
}
/*
====================
CL_GetMessage
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) // allways grab until fully connected
{
if (cls.timedemo)
{
if (host_framecount == cls.td_lastframe)
return 0; // allready 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
fread (&net_message.cursize, 4, 1, cls.demofile);
VectorCopy (cl.mviewangles[0], cl.mviewangles[1]);
for (i=0 ; i<3 ; i++)
{
fread (&f, 4, 1, cls.demofile);
cl.mviewangles[0][i] = LittleFloat (f);
}
net_message.cursize = LittleLong (net_message.cursize);
if (net_message.cursize > MAX_MSGLEN)
Sys_Error ("Demo message > MAX_MSGLEN");
r = fread (net_message.data, net_message.cursize, 1, cls.demofile);
if (r != 1)
{
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.cursize == 1 && net_message.data[0] == svc_nop)
Con_Printf ("<-- server to client keepalive\n");
else
break;
}
if (cls.demorecording)
CL_WriteDemoMessage ();
return r;
}
/*
====================
CL_Stop_f
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);
MSG_WriteByte (&net_message, svc_disconnect);
CL_WriteDemoMessage ();
// finish up
fclose (cls.demofile);
cls.demofile = NULL;
cls.demorecording = false;
Con_Printf ("Completed demo\n");
}
/*
====================
CL_Record_f
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 %d\n", cls.forcetrack);
}
else
track = -1;
sprint (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 = fopen (name, "wb");
if (!cls.demofile)
{
Con_Printf ("ERROR: couldn't open.\n");
return;
}
cls.forcetrack = track;
fprintf (cls.demofile, "%d\n", cls.forcetrack);
cls.demorecording = true;
}
/*
====================
CL_PlayDemo_f
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;
}
//
// 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;
while ((c = getc(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);
}
/*
====================
CL_FinishTimeDemo
====================
*/
void CL_FinishTimeDemo (void)
{
int frames;
float time;
cls.timedemo = false;
// the first frame didn't count
frames = (host_framecount - cls.td_startframe) - 1;
time = realtime - cls.td_starttime;
if (!time)
time = 1;
Con_Printf ("%d frames %5.1f seconds %5.1f fps\n", frames, time, frames/time);
}
/*
====================
CL_TimeDemo_f
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 ();
// 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
}