[FFmpeg-cvslog] timefilter: allow variable periods.

[Nicolas George]

ffmpeg | branch: master | Nicolas George <nicolas.george at normalesup.org> | Fri Mar  2 11:49:27 2012 +0100| [9bbe6ed1e0b80249124b8c040544cc30e753bb76] | committer: Nicolas George

timefilter: allow variable periods.

Initially found and designed by Michael Niedermayer.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9bbe6ed1e0b80249124b8c040544cc30e753bb76
---

 libavdevice/timefilter.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavdevice/timefilter.c b/libavdevice/timefilter.c
index 4b8a10c..8451466 100644
--- a/libavdevice/timefilter.c
+++ b/libavdevice/timefilter.c
@@ -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;
 }