github/mpv
1
Fork 0
mirror of https://github.com/mpv-player/mpv synced 2024-11-07 01:47:00 +01:00
Code Releases Activity

opengl: drop less frames when clip and display have similar fps

Browse Source 
adds 1 vsync interval "slack" before deciding to drop the first frame. it should
help on cases of timing jitter (sleep duration, container timestamps, compositor
vsync timing, etc). once the drop threshold has been crossed, it will keep
dropping until perfect timing alignment. this prevents crossing the drop
threshold back and forth repeatedly and therefore more resilient to frame drops
This commit is contained in:
Avi Halachmi (:avih) 2015-03-17 13:12:11 +02:00 committed by wm4
parent d453600b4f
commit f1746741de
1 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
video/out/vo.c
View File

@ -605,7 +605,15 @@ static bool render_frame(struct vo *vo)
if (!in->hasframe_rendered)
duration = -1; // disable framedrop
in->dropped_frame = duration >= 0 && end_time < next_vsync;
// if the clip and display have similar/identical fps, it's possible that
// we'll be very slightly late frequently due to timing jitter, or if the
// clip/container timestamps are not very accurate.
// so if we dropped the previous frame, keep dropping until we're aligned
// perfectly, else, allow some slack (1 vsync) to let it settle into a rhythm.
in->dropped_frame = duration >= 0 &&
((in->dropped_frame && end_time < next_vsync) ||
(end_time < prev_vsync)); // hard threshold - 1 vsync late
in->dropped_frame &= !(vo->driver->caps & VO_CAP_FRAMEDROP);
in->dropped_frame &= (vo->global->opts->frame_dropping & 1);
// Even if we're hopelessly behind, rather degrade to 10 FPS playback,