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-rw-r--r--video/out/vo.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/video/out/vo.c b/video/out/vo.c
index 70f682263e..0b197763a0 100644
--- a/video/out/vo.c
+++ b/video/out/vo.c
@@ -608,14 +608,22 @@ static bool render_frame(struct vo *vo)
if (!in->hasframe_rendered)
duration = -1; // disable framedrop
- // if the clip and display have similar/identical fps, it's possible that
+ // 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
+ // 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.
+ // On low clip fps, we don't drop anyway and the slack logic doesn't matter.
+ // If the clip fps is more than ~5% above screen fps, we remove this slack
+ // and use "normal" logic to allow more regular drops of 1 frame at a time.
+ bool use_slack = duration > (0.95 * in->vsync_interval);
in->dropped_frame = duration >= 0 &&
+ use_slack ?
((in->dropped_frame && end_time < next_vsync) ||
- (end_time < prev_vsync)); // hard threshold - 1 vsync late
+ (end_time < prev_vsync)) // hard threshold - 1 vsync late
+ :
+ end_time < next_vsync; // normal frequent drops
+
in->dropped_frame &= !(vo->driver->caps & VO_CAP_FRAMEDROP);
in->dropped_frame &= (vo->global->opts->frame_dropping & 1);