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Adapt first factor.

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Originally committed as revision 17842 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2009-03-06 00:20:55 +00:00
parent 55b5859867
commit 494065ca36
1 changed files with 4 additions and 1 deletions
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5
libavformat/timefilter.c
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@ -32,6 +32,7 @@ struct TimeFilter {
double feedback2_factor; double feedback2_factor;
double feedback3_factor; double feedback3_factor;
double integrator2_state; double integrator2_state;
int count;
}; };
TimeFilter * ff_timefilter_new(double feedback2_factor, double feedback3_factor) TimeFilter * ff_timefilter_new(double feedback2_factor, double feedback3_factor)
@ -51,10 +52,12 @@ void ff_timefilter_destroy(TimeFilter *self)
void ff_timefilter_reset(TimeFilter *self) void ff_timefilter_reset(TimeFilter *self)
{ {
self->cycle_time = 0; self->cycle_time = 0;
self->count = 0;
} }
double ff_timefilter_update(TimeFilter *self, double system_time, double period) double ff_timefilter_update(TimeFilter *self, double system_time, double period)
{ {
self->count++;
if (!self->cycle_time) { if (!self->cycle_time) {
/// init loop /// init loop
self->cycle_time = system_time; self->cycle_time = system_time;
@ -65,7 +68,7 @@ double ff_timefilter_update(TimeFilter *self, double system_time, double period)
loop_error = system_time - self->cycle_time; loop_error = system_time - self->cycle_time;
/// update loop /// update loop
self->cycle_time += self->feedback2_factor * loop_error; self->cycle_time += FFMAX(self->feedback2_factor, 1.0/(self->count)) * loop_error;
self->integrator2_state += self->feedback3_factor * loop_error / period; self->integrator2_state += self->feedback3_factor * loop_error / period;
} }
return self->cycle_time; return self->cycle_time;