gstreamer/ges/ges-auto-transition.c
Tim-Philipp Müller a7347ca8f7 WIP: ges: fix API export/import and 'inconsistent linkage' on MSVC
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
2018-12-15 00:14:51 +00:00

194 lines
6.5 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 (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 (parent == prev_topparent && parent == next_topparent) {
GST_DEBUG_OBJECT (self,
"Moving all inside the same group, nothing to do");
return;
}
}
if (_ges_track_element_get_layer_priority (self->next_source) !=
_ges_track_element_get_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;
}