Made sure that adding a new track only uses select-tracks-for-object for
core children to determine whether a track elements should be added to the
new track or not, and *not* any other track. In particular, there should
be *no* change in the existing tracks of the timeline when adding another
track. Moreover, a new track should not invoke the creation of track
elements for other tracks.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-editing-services/-/merge_requests/160>
Previously, the GESContainer ->paste method and GESGroup ->paste methods
were unnecessarily setting the timeline of groups, even though this is
handled by the GESGroup ->child_added method. This could result in the
group being added multiple times.
Technically, an element can still be floating on the return from
`->paste` (e.g. a clip not in a layer). Since the return of the `_paste`
methods are (return full) a non-floating object is probably expected in
all cases.
By-pass the select-tracks-for-object signal for auto-transitions since
their track element must land in the same track as the elements it is
the auto-transition for.
The way a clip's track elements are added to tracks was re-handled. This
doesn't affect the normal usage of a simple audio-video timeline, where
the tracks are added before any clips, but usage for multi-track
timelines has improved. The main changes are:
+ We can now handle a track being selected for more than one track,
including a full copy of their children properties and bindings.
(Previously broken.)
+ When a clip is split, we copy the new elements directly into the same
track, avoiding select-tracks-for-object.
+ When a clip is grouped or ungrouped, we avoid moving the elements to
or from tracks.
+ Added API to allow users to copy the core elements of a clip directly
into a track, complementing select-tracks-for-object.
+ Enforced the rule that a clip can only contain one core child in a
track, and all the non-core children must be added to tracks that
already contains a core child. This extends the previous condition
that two sources from the same clip should not be added to the same
track.
+ Made ges_track_add_element check that the newly added track element
does not break the configuration rules of the timeline.
+ When adding a track to a timeline, we only use
select-tracks-for-object to check whether track elements should be
added to the new track, not existing ones.
+ When removing a track from a timeline, we empty it of all the track
elements that are controlled by a clip. Thus, we ensure that a clip
only contains elements that are in the tracks of the same timeline, or
no track. Similarly, when removing a clip from a timeline.
+ We can now avoid unsupported timeline configurations when a layer is
added to a timeline, and already contains clips.
+ We can now avoid unsupported timeline configurations when a track is
added to a timeline, and the timeline already contains clips.
Fixes https://gitlab.freedesktop.org/gstreamer/gst-editing-services/-/issues/84
This was used to connect to the track element's notify::start signal in
order to update the duration of the timeline (it is not clear why the
notify::duration signal was not also connected to for the same reason).
However, this is already covered by the timeline_tree_move method, which
is always called to update the start of a track element, even if it is not
part of a clip (and similarly for timeline_tree_trim, which is called
when the duration is set).
Rename the private "owners" to "creators" to avoid confusing this with
the owner of the track element's memory.
Also made the ungroup method for GESClip symmetric by making all the
children of the resulting clips share their creators, which allows them
to be added to any of the other ungrouped clips. Once the clips are
grouped back together, the tracks loose these extra creators.
APIs:
- ges_timeline_get_frame_time
- ges_timeline_get_frame_at
- ges_clip_asset_get_frame_time
- ges_clip_get_timeline_time_from_source_frame
Extracting ges_util_structure_get_clocktime to internal utilities adding
support for specifying timing values in frames with the special
f<frame-number> synthax.
Only allow elements that were created by ges_clip_create_track_elements
(or copied from such an element) to be added to a clip. This prevents
users from adding arbitrary elements to a clip.
As an exception, a user can add GESBaseEffects to clips whose class
supports it, i.e. to a GESSourceClip and a GESBaseEffectClip.
This change also introduces a distinction between the core elements of a
clip (created by ges_clip_create_track_elements) and non-core elements
(currently, only GESBaseEffects, for some classes). In particular,
GESBaseEffectClip will now distinguish between its core elements and
effects added by the user. This means that the core elements will always
have the lowest priority, and will not be listed as top effects. This is
desirable because it brings the behaviour of GESBaseEffectClip in line
with other clip types.
We were implementing the logic for moving/trimming elements specific
to SourceClip but this was not correct ass the new timeline tree allows
us to handle that for all element types in a generic and nice way.
This make us need to have groups trimming properly implemented in the
timeline tree, leading to some fixes in the group tests.
This adds tests for the various cases known to not be handled properly
by the previous code.
Fixes https://gitlab.freedesktop.org/gstreamer/gst-editing-services/issues/92
Previously, we tested that the given priority was `>0`, when it seems
that `>=0` was intended. A priority of `-1` means leave the priority
unchanged, whilst a priority of 0, or more, means move to this layer
priority.
The method steals ownership of `copied_from`, so should be responsible
for unreffing it. Also make sure we fail when `layer != -1`, since this
functionality is not supported.
By passing NULL to `g_signal_new` instead of a marshaller, GLib will
actually internally optimize the signal (if the marshaller is available
in GLib itself) by also setting the valist marshaller. This makes the
signal emission a bit more performant than the regular marshalling,
which still needs to box into `GValue` and call libffi in case of a
generic marshaller.
Note that for custom marshallers, one would use
`g_signal_set_va_marshaller()` with the valist marshaller instead.
In the case of nested timeline in the toplevel timeline we ended up
with CompositionUpdate for seeks sent by our own composition to
granchildren composition. This was not causing essential issues
if all tracks where containing nested timelines but in cases
where one of the tracks only had a nested timelines, then we
were waiting forever for a `CompositionUpdateDone`.
CompositionUpdate translated into ASYNC_START/ASYNC_DONE should
be kept inside the GESTimeline and not travel up (possibly to some
parent GESTimeline).
This is implemented on top of a Tree that represents the whole timeline.
SourceClips can not fully overlap anymore and the tests have been
updated to take that into account. Some new tests were added to verify
that behaviour in greater details
Auto transition when having 3 overlapping clips in a same point in the
timeline is not supported as we can't handle it in a nice way. Before we
to avoid creating 2 overlapping transitions (which is plain broken in
NLE) were completely disabling `auto-transition` and removing all
auto-transitions in the timeline but this is pretty weird for the end
user. This commit changes and now makes sure 2 transitions are not
created in the same place.
Also cleanup previous test case.
Export GES library API in headers when we're building the
library itself, otherwise import the API from the headers.
This fixes linker warnings on Windows when building with MSVC.
Fix up some missing config.h includes when building the lib which
is needed to get the export api define from config.h
Fixes https://gitlab.freedesktop.org/gstreamer/gst-editing-services/issues/42
summary_:
This way the timeline can handle all priorities for the user
making the API simpler to use.
API:
+ ges_timeline_move_layer
reviewers_: Mathieu_Du
Differential Revision: https://phabricator.freedesktop.org/D232
In the (now tested) scenario where we have a transition on the right
side of a clip we are splitting, auto transitions can't be created
because we resize the clip after adding the new one, meaning that
there are 3 elements in the "transition zone", we need to force
auto transition creation after the splitting.
Fixes https://gitlab.gnome.org/GNOME/pitivi/issues/2142
