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Improve stability FPS measure in timecounter

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Bruno Herbelin
2021-09-24 00:45:47 +02:00
parent f4c52b7ed3
commit bd773d54c6
2 changed files with 18 additions and 12 deletions
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15
MediaPlayer.cpp
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@@ -1274,12 +1274,15 @@ MediaPlayer::TimeCounter::~TimeCounter()
void MediaPlayer::TimeCounter::tic ()
{
double dt = g_timer_elapsed (timer, NULL) * 1000.0;
g_timer_start(timer);
const double dt = g_timer_elapsed (timer, NULL) * 1000.0;
// calculate instantaneous framerate
// Exponential moving averate with previous framerate to filter jitter
if (dt > 1.0)
fps = CLAMP( 0.5 * fps + 500.0 / dt, 0.0, 1000.0) ;
// ignore refresh after too little time
if (dt > 3.0){
// restart timer
g_timer_start(timer);
// calculate instantaneous framerate
// Exponential moving averate with previous framerate to filter jitter
fps = CLAMP( 0.5 * fps + 500.0 / dt, 0.0, 1000.0);
}
}