From 8a9ae37feef5b09332222045a3d9ad948cdcc445 Mon Sep 17 00:00:00 2001 From: Nicolas George Date: Sun, 4 Mar 2012 12:17:02 +0100 Subject: timefilter: allow to evaluate at other times. --- libavdevice/timefilter.c | 5 +++++ libavdevice/timefilter.h | 9 +++++++++ 2 files changed, 14 insertions(+) diff --git a/libavdevice/timefilter.c b/libavdevice/timefilter.c index 8451466657..a423fc0859 100644 --- a/libavdevice/timefilter.c +++ b/libavdevice/timefilter.c @@ -83,6 +83,11 @@ double ff_timefilter_update(TimeFilter *self, double system_time, double period) return self->cycle_time; } +double ff_timefilter_eval(TimeFilter *self, double delta) +{ + return self->cycle_time + self->clock_period * delta; +} + #ifdef TEST #include "libavutil/lfg.h" #define LFG_MAX ((1LL << 32) - 1) diff --git a/libavdevice/timefilter.h b/libavdevice/timefilter.h index 33862f63bb..66629591a2 100644 --- a/libavdevice/timefilter.h +++ b/libavdevice/timefilter.h @@ -81,6 +81,15 @@ TimeFilter * ff_timefilter_new(double clock_period, double feedback2_factor, dou */ double ff_timefilter_update(TimeFilter *self, double system_time, double period); +/** + * Evaluate the filter at a specified time + * + * @param delta difference between the requested time and the current time + * (last call to ff_timefilter_update). + * @return the filtered time + */ +double ff_timefilter_eval(TimeFilter *self, double delta); + /** * Reset the filter * -- cgit v1.2.3