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timefilter: allow variable periods. 

Initially found and designed by Michael Niedermayer.
This commit is contained in:
Nicolas George 2012-03-02 11:49:27 +01:00
parent 3073aadf2d
commit 9bbe6ed1e0
1 changed files with 2 additions and 2 deletions
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4
libavdevice/timefilter.c
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@ -50,7 +50,7 @@ TimeFilter *ff_timefilter_new(double time_base,
double o = 2 * M_PI * bandwidth * period * time_base;
self->clock_period = time_base;
self->feedback2_factor = qexpneg(M_SQRT2 * o);
self->feedback3_factor = qexpneg(o * o);
self->feedback3_factor = qexpneg(o * o) / period;
return self;
}
@ -78,7 +78,7 @@ double ff_timefilter_update(TimeFilter *self, double system_time, double period)
/// update loop
self->cycle_time += FFMAX(self->feedback2_factor, 1.0 / self->count) * loop_error;
self->clock_period += self->feedback3_factor * loop_error / period;
self->clock_period += self->feedback3_factor * loop_error;
}
return self->cycle_time;
}