Editing has been simplified by breaking down each edit into a
combination of three basic single-element edits: MOVE, TRIM_START, and
TRIM_END.
Each edit follows these steps:
+ Determine which elements are to be edited and under which basic mode
+ Determine which track elements will move as a result
+ Snap the edit position to one of the edges of the main edited element,
(or the edge of one of its descendants, in the case of MOVE), avoiding
moving elements.
NOTE: in particular, we can *not* snap to the edge of a neighbouring
element in a roll edit. This was previously possible, even though the
neighbour was moving!
+ Determine the edit positions for clips (or track elements with no
parent) using the snapped value. In addition, we replace any edits of
a group with an edit of its descendant clips. If any value would be
out of bounds (e.g. negative start) we do not edit.
NOTE: this is now done *after* checking the snapping. This allows the
edit to succeed if snapping would cause it to go from being invalid to
valid!
+ Determine whether the collection of edits would result in a valid
timeline-configuration which does not break the rules for sources
overlapping.
+ If all this succeeds, we emit snapping-started on the timeline.
+ We then perform all the edits. At this point they should all succeed.
The simplification/unification should make it easier to make other
changes.
Fixes https://gitlab.freedesktop.org/gstreamer/gst-editing-services/-/issues/97
Fixes https://gitlab.freedesktop.org/gstreamer/gst-editing-services/-/issues/98
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-editing-services/-/merge_requests/169>
Simplified keeping the start and the duration of a container/group up to
date with the earliest start of the children and the last end of the
children. The previous logic was spread between ges-group and
ges-container, now all the position handling is in ges-container.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-editing-services/-/merge_requests/169>
The duration-limit is the maximum duration that can be set for the clip
given its current children and their properties. If a change in the
children properties causes this to drop below the current duration, it
is automatically capped by this limit.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-editing-services/-/merge_requests/169>
If `add_child` and `set_parent` succeed we want to return TRUE, even if
the added element is no longer a child by the end of the method. This is
because some users may call ges_container_remove during `child-added`.
This shouldn't be considered an error.
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>
The property had been deprecated and is unused.
This property is not needed. Any internal time effect that an nleoperation
wraps is itself responsible for converting seek/segment timestamps.
Previously, the ghostpads were performing a rate conversion after the
rate element had already done so, essentially doubling their effect on
seeks and segment times. This was always unnecessary, but went unnoticed
by the tempochange test because it was using an identity element rather
than an actual rate-changing element.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-editing-services/-/merge_requests/160>
Avoid loosing (too much) precision when rescaling back and forth by
storing values in gdoubles.
Handle the fact that position values can be negative
Also fix debug category static variable
as it clashes with the instance variable name in a few methods.
Basically when using timeoverlay we where waiting for input-selector
to receive EOS on its active on the output-selector streaming thread
but... EOS was being sent from that same thread waiting for input-selector
to unblock to send EOS on its other pad.
In our specific use case we want EOS to be sent only on the active pad.
Fixes: https://gitlab.freedesktop.org/gstreamer/gst-editing-services/-/issues/103
Instead of focusing on the instances of the clips and their children,
we relax the check to allow moving track element clip between clips
that share a common asset. This makes it as correct conceptually but
more flexible, and the code becomes simpler.
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.
Previously, the code was not able to detect that an element overlaps on
its end, nor could it detect that an element overlaps two elements that
already overlap.
When the asset of a uri clip is reset, its core children are removed and
replaced by the new core children. When replacing, the `set_asset`
method attempts to copy children properties from the previous children
to the new children. However, the children were matched by track-type
only. This would not function as intended when a URI contains multiple
audio or video streams. Instead, we now match children by the tracks
themselves. This should work better, provided the user's
select-tracks-for-object is well behaved.
Also, fix a memory problem in `set_mute` for when a child is not in a
track.
Only copy the properties that can be both read and written, and are not
construct only. Similarly for child properties when a track-element is
deep copied.
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).
Before the max-duration could be set arbitrarily when the clip was empty,
to indicate what the max-duration would be once the core children were
created. Now, we can also do this whilst the clip only contains non-core
children.
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.
Make sure we sink the child on adding, and keep it alive until the end
in case the method fails.
Also, since the child mappings hold a ref to the child, they should give
them up in their free method. This way, the ref will be given up on
disposing, even if ges_container_remove fails.
Also, reverse setting of the start of the container if adding fails.
gcc-10 defaults to -fno-common, which exposes a symbol conflict, so
use `static` correctly. Also we don't use `parent_extractable_iface`
in `ges-uri-clip.c`.
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85678
GES_TESTING_ASSETS_DIRECTORY is prehistoric and since then
new mechanism for asset relocation have been added, it makes
no sense to keep that unused code path
Refactoring GESVideoSource so that #GESUriVideoSource can handle
still image in a simple way
MultiFileSource has been replaced with the new `imagesequencesrc`
element, this was totally broken anyway as `multifilesrc` can not seek
properly.
This means that we have all the information about the asset
when constructing the underlying GstElements.
This also allows to cleanup some code all around
And deprecate all GESTrackElement constructors, but the GESEffect one.
Those should **never** be created by users and should become internal
in the future.
Stop having docstring for the constructors that were internal.
