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/* GStreamer Editing Services
* Copyright (C) 2010 Edward Hervey <edward.hervey@collabora.co.uk>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:ges-utils
* @title: GES utilities
* @short_description: Convenience methods
*
*/
#include <string.h>
#include "ges-internal.h"
#include "ges-timeline.h"
#include "ges-track.h"
#include "ges-layer.h"
#include "ges.h"
static GstElementFactory *compositor_factory = NULL;
/**
* ges_timeline_new_audio_video:
*
* Creates a new #GESTimeline containing a raw audio and a
* raw video track.
*
* Returns: (transfer floating): The newly created #GESTimeline.
*/
GESTimeline *
ges_timeline_new_audio_video (void)
{
GESTrack *tracka, *trackv;
GESTimeline *timeline;
/* This is our main GESTimeline */
timeline = ges_timeline_new ();
tracka = GES_TRACK (ges_audio_track_new ());
trackv = GES_TRACK (ges_video_track_new ());
if (!ges_timeline_add_track (timeline, trackv) ||
!ges_timeline_add_track (timeline, tracka)) {
gst_object_unref (timeline);
timeline = NULL;
}
return timeline;
}
/* Internal utilities */
gint
element_start_compare (GESTimelineElement * a, GESTimelineElement * b)
{
if (a->start == b->start) {
if (a->priority < b->priority)
return -1;
if (a->priority > b->priority)
return 1;
if (a->duration < b->duration)
return -1;
if (a->duration > b->duration)
return 1;
return 0;
} else if (a->start < b->start)
return -1;
return 1;
}
gint
element_end_compare (GESTimelineElement * a, GESTimelineElement * b)
{
if (GES_TIMELINE_ELEMENT_END (a) == GES_TIMELINE_ELEMENT_END (b)) {
if (a->priority < b->priority)
return -1;
if (a->priority > b->priority)
return 1;
if (a->duration < b->duration)
return -1;
if (a->duration > b->duration)
return 1;
return 0;
} else if (GES_TIMELINE_ELEMENT_END (a) < (GES_TIMELINE_ELEMENT_END (b)))
return -1;
return 1;
}
gboolean
ges_pspec_equal (gconstpointer key_spec_1, gconstpointer key_spec_2)
{
const GParamSpec *key1 = key_spec_1;
const GParamSpec *key2 = key_spec_2;
return (key1->owner_type == key2->owner_type &&
strcmp (key1->name, key2->name) == 0);
}
guint
ges_pspec_hash (gconstpointer key_spec)
{
const GParamSpec *key = key_spec;
const gchar *p;
guint h = key->owner_type;
for (p = key->name; *p; p++)
h = (h << 5) - h + *p;
return h;
}
static gboolean
find_compositor (GstPluginFeatureFilter * feature, gpointer udata)
{
const gchar *klass;
if (G_UNLIKELY (!GST_IS_ELEMENT_FACTORY (feature)))
return FALSE;
klass = gst_element_factory_get_metadata (GST_ELEMENT_FACTORY_CAST (feature),
GST_ELEMENT_METADATA_KLASS);
return (strstr (klass, "Compositor") != NULL);
}
GstElementFactory *
ges_get_compositor_factory (void)
{
GList *result;
if (compositor_factory)
return compositor_factory;
result = gst_registry_feature_filter (gst_registry_get (),
(GstPluginFeatureFilter) find_compositor, FALSE, NULL);
/* sort on rank and name */
result = g_list_sort (result, gst_plugin_feature_rank_compare_func);
g_assert (result);
compositor_factory = result->data;
gst_plugin_feature_list_free (result);
return compositor_factory;
}
gboolean
ges_nle_composition_add_object (GstElement * comp, GstElement * object)
{
return gst_bin_add (GST_BIN (comp), object);
}
gboolean
ges_nle_composition_remove_object (GstElement * comp, GstElement * object)
{
return gst_bin_remove (GST_BIN (comp), object);
}
gboolean
ges_nle_object_commit (GstElement * nlesource, gboolean recurse)
{
gboolean ret;
g_signal_emit_by_name (nlesource, "commit", recurse, &ret);
return ret;
}
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