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event: Unset SNAP flags when creating a new seek event without KEY_UNIT flag

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The SNAP flags only make sense in combination with the KEY_UNIT flag,
and without they expose all kinds of unexpected behaviour in various
elements that don't expect this from happening.

Also warn if this ever happens.

https://bugzilla.gnome.org/show_bug.cgi?id=796558
This commit is contained in:
Sebastian Dröge 2018-06-11 10:22:39 +03:00
parent 1908daf29c
commit 8f496b7392
1 changed files with 12 additions and 0 deletions
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12
gst/gstevent.c
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@ -1268,6 +1268,18 @@ gst_event_new_seek (gdouble rate, GstFormat format, GstSeekFlags flags,
g_return_val_if_fail (rate != 0.0, NULL);
/* SNAP flags only make sense in combination with the KEYUNIT flag. Warn
* and unset the SNAP flags if they're set without the KEYUNIT flag */
if (!(flags & GST_SEEK_FLAG_KEY_UNIT) &&
(flags & (GST_SEEK_FLAG_SNAP_BEFORE | GST_SEEK_FLAG_SNAP_AFTER |
GST_SEEK_FLAG_SNAP_NEAREST))) {
g_warning ("SNAP seeks only work in combination with the KEY_UNIT "
"flag, ignoring SNAP flags");
flags &=
~(GST_SEEK_FLAG_SNAP_BEFORE | GST_SEEK_FLAG_SNAP_AFTER |
GST_SEEK_FLAG_SNAP_NEAREST);
}
if (format == GST_FORMAT_TIME) {
GST_CAT_INFO (GST_CAT_EVENT,
"creating seek rate %lf, format TIME, flags %d, "