gstreamer/ges/ges-utils.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

189 lines
4.4 KiB
C

/* 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
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#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;
}