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timeline: create auto-transitions during track-element-added

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Any time a track element is added to a track, we need to check whether
we need to create a new corresponding auto-transition. This simply moves
the code from ges-clip.c to ges-timeline.c, where it is more appropriate.

Moreover, it technically opens the possibility for creating
auto-transitions for track elements in the timeline that have no
corresponding clip.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-editing-services/-/merge_requests/169>
This commit is contained in:
Henry Wilkes 2020-04-27 16:27:15 +01:00
parent b00c01ded7
commit a4cfa6d1e1
2 changed files with 14 additions and 4 deletions
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4
ges/ges-clip.c
View file

@ -2610,9 +2610,5 @@ ges_clip_add_child_to_track (GESClip * clip, GESTrackElement * child,
return NULL;
}
if (GES_IS_SOURCE (el))
timeline_tree_create_transitions_for_track_element (timeline_get_tree
(timeline), el, ges_timeline_find_auto_transition);
return el;
}

14
ges/ges-timeline.c
View file

@ -181,6 +181,7 @@ typedef struct
GESTrack *track;
GstPad *pad; /* Pad from the track */
GstPad *ghostpad;
gulong track_element_added_sigid;
gulong probe_id;
GstStream *stream;
@ -1523,6 +1524,15 @@ clip_track_element_removed_cb (GESClip * clip,
}
}
static void
track_element_added_cb (GESTrack * track, GESTrackElement * element,
GESTimeline * timeline)
{
if (GES_IS_SOURCE (element))
timeline_tree_create_transitions_for_track_element (timeline->priv->tree,
element, ges_timeline_find_auto_transition);
}
/* returns TRUE if no errors in adding to tracks */
static gboolean
_add_clip_children_to_tracks (GESTimeline * timeline, GESClip * clip,
@ -2281,6 +2291,8 @@ ges_timeline_add_track (GESTimeline * timeline, GESTrack * track)
tr_priv = g_new0 (TrackPrivate, 1);
tr_priv->timeline = timeline;
tr_priv->track = track;
tr_priv->track_element_added_sigid = g_signal_connect (track,
"track-element-added", G_CALLBACK (track_element_added_cb), timeline);
update_stream_object (tr_priv);
gst_stream_collection_add_stream (timeline->priv->stream_collection,
@ -2399,6 +2411,8 @@ ges_timeline_remove_track (GESTimeline * timeline, GESTrack * track)
return FALSE;
}
g_signal_handler_disconnect (track, tr_priv->track_element_added_sigid);
/* set track state to NULL */
gst_element_set_state (GST_ELEMENT (track), GST_STATE_NULL);