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don't seek while backing up over demotime. gzipped demos no longer slow down as

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the demo progresses (this will probably also be good for eventual dzip
support).
This commit is contained in:
Bill Currie 2000-12-19 20:33:06 +00:00
parent 0e268f9ca7
commit 24a76ef439
1 changed files with 15 additions and 8 deletions
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23
source/cl_demo.c
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@ -175,10 +175,17 @@ CL_GetDemoMessage (void)
float demotime;
byte c;
usercmd_t *pcmd;
static int demotime_cached;
static float cached_demotime;
// read the time from the packet
Qread (cls.demofile, &demotime, sizeof (demotime));
demotime = LittleFloat (demotime);
if (demotime_cached) {
demotime = cached_demotime;
demotime_cached = 0;
} else {
Qread (cls.demofile, &demotime, sizeof (demotime));
demotime = LittleFloat (demotime);
}
// decide if it is time to grab the next message
if (cls.timedemo) {
@ -187,8 +194,8 @@ CL_GetDemoMessage (void)
else if (demotime > cls.td_lastframe) {
cls.td_lastframe = demotime;
// rewind back to time
Qseek (cls.demofile, Qtell (cls.demofile) - sizeof (demotime),
SEEK_SET);
demotime_cached = 1;
cached_demotime = demotime;
return 0; // allready read this frame's message
}
if (!cls.td_starttime && cls.state == ca_active) {
@ -203,13 +210,13 @@ CL_GetDemoMessage (void)
// too far back
realtime = demotime - 1.0;
// rewind back to time
Qseek (cls.demofile, Qtell (cls.demofile) - sizeof (demotime),
SEEK_SET);
demotime_cached = 1;
cached_demotime = demotime;
return 0;
} else if (realtime < demotime) {
// rewind back to time
Qseek (cls.demofile, Qtell (cls.demofile) - sizeof (demotime),
SEEK_SET);
demotime_cached = 1;
cached_demotime = demotime;
return 0; // don't need another message yet
}
} else