gstreamer/ges/ges-auto-transition.c
Thibault Saunier a46390ff56 Reimplement the timeline editing API
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
2019-03-15 23:51:55 +00:00

211 lines
7 KiB
C

/* -*- Mode: C; indent-tabs-mode: nil; c-basic-offset: 2; tab-width: 2 -*- */
/*
* gst-editing-services
* Copyright (C) 2013 Thibault Saunier <thibault.saunier@collabora.com>
*
* gst-editing-services is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* gst-editing-services is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.";
*/
/* This class warps a GESBaseTransitionClip, letting any implementation
* of a GESBaseTransitionClip to be used.
*
* NOTE: This is for internal use exclusively
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ges-auto-transition.h"
#include "ges-internal.h"
enum
{
DESTROY_ME,
LAST_SIGNAL
};
static guint auto_transition_signals[LAST_SIGNAL] = { 0 };
G_DEFINE_TYPE (GESAutoTransition, ges_auto_transition, G_TYPE_OBJECT);
static void
neighbour_changed_cb (GESClip * clip, GParamSpec * arg G_GNUC_UNUSED,
GESAutoTransition * self)
{
gint64 new_duration;
GESTimelineElement *parent =
ges_timeline_element_get_toplevel_parent (GES_TIMELINE_ELEMENT (clip));
if (ELEMENT_FLAG_IS_SET (parent, GES_TIMELINE_ELEMENT_SET_SIMPLE)) {
return;
}
if (parent) {
GESTimelineElement *prev_topparent =
ges_timeline_element_get_toplevel_parent (GES_TIMELINE_ELEMENT
(self->next_source));
GESTimelineElement *next_topparent =
ges_timeline_element_get_toplevel_parent (GES_TIMELINE_ELEMENT
(self->previous_source));
if (ELEMENT_FLAG_IS_SET (prev_topparent, GES_TIMELINE_ELEMENT_SET_SIMPLE) ||
ELEMENT_FLAG_IS_SET (next_topparent, GES_TIMELINE_ELEMENT_SET_SIMPLE)) {
return;
}
if (parent == prev_topparent && parent == next_topparent) {
GST_DEBUG_OBJECT (self,
"Moving all inside the same group, nothing to do");
return;
}
}
if (GES_TIMELINE_ELEMENT_LAYER_PRIORITY (self->next_source) !=
GES_TIMELINE_ELEMENT_LAYER_PRIORITY (self->previous_source)) {
GST_DEBUG_OBJECT (self, "Destroy changed layer");
g_signal_emit (self, auto_transition_signals[DESTROY_ME], 0);
return;
}
new_duration =
(_START (self->previous_source) +
_DURATION (self->previous_source)) - _START (self->next_source);
if (new_duration <= 0 || new_duration >= _DURATION (self->previous_source)
|| new_duration >= _DURATION (self->next_source)) {
GST_DEBUG_OBJECT (self, "Destroy %" G_GINT64_FORMAT " not a valid duration",
new_duration);
g_signal_emit (self, auto_transition_signals[DESTROY_ME], 0);
return;
}
self->positioning = TRUE;
_set_start0 (GES_TIMELINE_ELEMENT (self->transition_clip),
_START (self->next_source));
_set_duration0 (GES_TIMELINE_ELEMENT (self->transition_clip), new_duration);
self->positioning = FALSE;
}
static void
_track_changed_cb (GESTrackElement * track_element,
GParamSpec * arg G_GNUC_UNUSED, GESAutoTransition * self)
{
if (ges_track_element_get_track (track_element) == NULL) {
GST_DEBUG_OBJECT (self, "Neighboor %" GST_PTR_FORMAT
" removed from track ... auto destructing", track_element);
g_signal_emit (self, auto_transition_signals[DESTROY_ME], 0);
}
}
static void
ges_auto_transition_init (GESAutoTransition * ges_auto_transition)
{
}
static void
ges_auto_transition_finalize (GObject * object)
{
GESAutoTransition *self = GES_AUTO_TRANSITION (object);
g_signal_handlers_disconnect_by_func (self->previous_source,
neighbour_changed_cb, self);
g_signal_handlers_disconnect_by_func (self->next_source, neighbour_changed_cb,
self);
g_signal_handlers_disconnect_by_func (self->next_source, _track_changed_cb,
self);
g_signal_handlers_disconnect_by_func (self->previous_source,
_track_changed_cb, self);
g_free (self->key);
G_OBJECT_CLASS (ges_auto_transition_parent_class)->finalize (object);
}
static void
ges_auto_transition_class_init (GESAutoTransitionClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
auto_transition_signals[DESTROY_ME] =
g_signal_new ("destroy-me", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE, 0, NULL, NULL, NULL,
G_TYPE_NONE, 0);
object_class->finalize = ges_auto_transition_finalize;
}
GESAutoTransition *
ges_auto_transition_new (GESTrackElement * transition,
GESTrackElement * previous_source, GESTrackElement * next_source)
{
GESAutoTransition *self = g_object_new (GES_TYPE_AUTO_TRANSITION, NULL);
self->previous_source = previous_source;
self->next_source = next_source;
self->transition = transition;
self->previous_clip =
GES_CLIP (GES_TIMELINE_ELEMENT_PARENT (previous_source));
self->next_clip = GES_CLIP (GES_TIMELINE_ELEMENT_PARENT (next_source));
self->transition_clip = GES_CLIP (GES_TIMELINE_ELEMENT_PARENT (transition));
g_signal_connect (previous_source, "notify::start",
G_CALLBACK (neighbour_changed_cb), self);
g_signal_connect_after (previous_source, "notify::priority",
G_CALLBACK (neighbour_changed_cb), self);
g_signal_connect (next_source, "notify::start",
G_CALLBACK (neighbour_changed_cb), self);
g_signal_connect (next_source, "notify::priority",
G_CALLBACK (neighbour_changed_cb), self);
g_signal_connect (previous_source, "notify::duration",
G_CALLBACK (neighbour_changed_cb), self);
g_signal_connect (next_source, "notify::duration",
G_CALLBACK (neighbour_changed_cb), self);
g_signal_connect (next_source, "notify::track",
G_CALLBACK (_track_changed_cb), self);
g_signal_connect (previous_source, "notify::track",
G_CALLBACK (_track_changed_cb), self);
GST_DEBUG_OBJECT (self, "Created transition %" GST_PTR_FORMAT
" between %" GST_PTR_FORMAT "[%" GST_TIME_FORMAT
" - %" GST_TIME_FORMAT "] and: %" GST_PTR_FORMAT
"[%" GST_TIME_FORMAT " - %" GST_TIME_FORMAT "]"
" in layer nb %i, start: %" GST_TIME_FORMAT " duration: %"
GST_TIME_FORMAT, transition, previous_source,
GST_TIME_ARGS (_START (previous_source)),
GST_TIME_ARGS (_END (previous_source)),
next_source,
GST_TIME_ARGS (_START (next_source)),
GST_TIME_ARGS (_END (next_source)),
ges_layer_get_priority (ges_clip_get_layer
(self->previous_clip)),
GST_TIME_ARGS (_START (transition)),
GST_TIME_ARGS (_DURATION (transition)));
self->key = g_strdup_printf ("%p%p", self->previous_source,
self->next_source);
return self;
}
void
ges_auto_transition_update (GESAutoTransition * self)
{
GST_INFO ("Updating info %s",
GES_TIMELINE_ELEMENT_NAME (self->transition_clip));
neighbour_changed_cb (self->previous_clip, NULL, self);
}