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vo_vdpau: add some debugging messages for frame timing

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Note that this will print a difference even with perfect sync, because
the code queues the frames _between_ vsync, probably for error margin
(though I don't understand why it uses the exact values chosen).
This commit is contained in:
wm4 2013-12-22 15:48:38 +01:00
parent e6bea0ec5a
commit 895932aa0a
1 changed files with 4 additions and 2 deletions
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6
video/out/vo_vdpau.c
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@ -1020,10 +1020,12 @@ static int update_presentation_queue_status(struct vo *vo)
break;
if (vc->vsync_interval > 1) {
uint64_t qtime = vc->queue_time[vc->query_surface_num];
int diff = ((int64_t)vtime - (int64_t)qtime) / 1e6;
MP_TRACE(vo, "Queue time difference: %d ms\n", diff);
if (vtime < qtime + vc->vsync_interval / 2)
MP_VERBOSE(vo, "Frame shown too early\n");
MP_VERBOSE(vo, "Frame shown too early (%d ms)\n", diff);
if (vtime > qtime + vc->vsync_interval)
MP_VERBOSE(vo, "Frame shown late\n");
MP_VERBOSE(vo, "Frame shown late (%d ms)\n", diff);
}
vc->query_surface_num = WRAP_ADD(vc->query_surface_num, 1,
vc->num_output_surfaces);