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318 lines
7.9 KiB
C
318 lines
7.9 KiB
C
/* GStreamer Editing Services
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* Copyright (C) 2010 Edward Hervey <edward.hervey@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:ges-utils
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* @title: GES utilities
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* @short_description: Convenience methods
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include "ges-internal.h"
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#include "ges-timeline.h"
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#include "ges-track.h"
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#include "ges-layer.h"
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#include "ges.h"
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#include <gst/base/base.h>
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static GstElementFactory *compositor_factory = NULL;
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/**
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* ges_timeline_new_audio_video:
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*
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* Creates a new timeline containing a single #GESAudioTrack and a
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* single #GESVideoTrack.
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*
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* Returns: (transfer floating): The new timeline, or %NULL if the tracks
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* could not be created and added.
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*/
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GESTimeline *
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ges_timeline_new_audio_video (void)
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{
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GESTrack *tracka, *trackv;
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GESTimeline *timeline;
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/* This is our main GESTimeline */
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timeline = ges_timeline_new ();
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tracka = GES_TRACK (ges_audio_track_new ());
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trackv = GES_TRACK (ges_video_track_new ());
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if (!ges_timeline_add_track (timeline, trackv) ||
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!ges_timeline_add_track (timeline, tracka)) {
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gst_object_unref (timeline);
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timeline = NULL;
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}
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return timeline;
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}
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/* Internal utilities */
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gint
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element_start_compare (GESTimelineElement * a, GESTimelineElement * b)
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{
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if (a->start == b->start) {
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if (a->priority < b->priority)
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return -1;
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if (a->priority > b->priority)
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return 1;
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if (a->duration < b->duration)
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return -1;
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if (a->duration > b->duration)
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return 1;
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return 0;
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} else if (a->start < b->start)
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return -1;
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return 1;
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}
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gint
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element_end_compare (GESTimelineElement * a, GESTimelineElement * b)
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{
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if (GES_TIMELINE_ELEMENT_END (a) == GES_TIMELINE_ELEMENT_END (b)) {
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if (a->priority < b->priority)
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return -1;
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if (a->priority > b->priority)
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return 1;
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if (a->duration < b->duration)
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return -1;
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if (a->duration > b->duration)
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return 1;
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return 0;
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} else if (GES_TIMELINE_ELEMENT_END (a) < (GES_TIMELINE_ELEMENT_END (b)))
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return -1;
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return 1;
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}
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gboolean
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ges_pspec_equal (gconstpointer key_spec_1, gconstpointer key_spec_2)
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{
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const GParamSpec *key1 = key_spec_1;
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const GParamSpec *key2 = key_spec_2;
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return (key1->owner_type == key2->owner_type &&
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strcmp (key1->name, key2->name) == 0);
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}
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guint
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ges_pspec_hash (gconstpointer key_spec)
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{
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const GParamSpec *key = key_spec;
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const gchar *p;
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guint h = key->owner_type;
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for (p = key->name; *p; p++)
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h = (h << 5) - h + *p;
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return h;
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}
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static gboolean
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find_compositor (GstPluginFeature * feature, gpointer udata)
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{
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gboolean res = FALSE;
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const gchar *klass;
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GstPluginFeature *loaded_feature = NULL;
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GstElement *elem = NULL;
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if (G_UNLIKELY (!GST_IS_ELEMENT_FACTORY (feature)))
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return FALSE;
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klass = gst_element_factory_get_metadata (GST_ELEMENT_FACTORY_CAST (feature),
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GST_ELEMENT_METADATA_KLASS);
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if (strstr (klass, "Compositor") == NULL)
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return FALSE;
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loaded_feature = gst_plugin_feature_load (feature);
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if (!loaded_feature) {
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GST_ERROR ("Could not load feature: %" GST_PTR_FORMAT, feature);
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return FALSE;
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}
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/* Some hardware compositor elements (d3d11compositor for example) consist of
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* bin with internal mixer elements */
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if (g_type_is_a (gst_element_factory_get_element_type (GST_ELEMENT_FACTORY
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(loaded_feature)), GST_TYPE_BIN)) {
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GParamSpec *pspec;
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GstElement *mixer = NULL;
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elem =
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gst_element_factory_create (GST_ELEMENT_FACTORY_CAST (loaded_feature),
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NULL);
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/* Checks whether this element has mixer property and the internal element
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* is aggregator subclass */
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if (!elem) {
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GST_ERROR ("Could not create element from factory %" GST_PTR_FORMAT,
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feature);
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goto done;
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}
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pspec = g_object_class_find_property (G_OBJECT_GET_CLASS (elem), "mixer");
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if (!pspec)
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goto done;
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if (!g_type_is_a (pspec->value_type, GST_TYPE_ELEMENT))
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goto done;
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g_object_get (elem, "mixer", &mixer, NULL);
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if (!mixer)
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goto done;
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if (GST_IS_AGGREGATOR (mixer))
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res = TRUE;
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gst_object_unref (mixer);
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} else {
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res =
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g_type_is_a (gst_element_factory_get_element_type (GST_ELEMENT_FACTORY
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(loaded_feature)), GST_TYPE_AGGREGATOR);
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}
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done:
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gst_clear_object (&elem);
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gst_object_unref (loaded_feature);
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return res;
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}
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gboolean
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ges_util_structure_get_clocktime (GstStructure * structure, const gchar * name,
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GstClockTime * val, GESFrameNumber * frames)
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{
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gboolean found = FALSE;
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const GValue *gvalue;
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if (!val && !frames)
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return FALSE;
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gvalue = gst_structure_get_value (structure, name);
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if (!gvalue)
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return FALSE;
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if (frames)
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*frames = GES_FRAME_NUMBER_NONE;
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found = TRUE;
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if (val && G_VALUE_TYPE (gvalue) == GST_TYPE_CLOCK_TIME) {
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*val = (GstClockTime) g_value_get_uint64 (gvalue);
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} else if (val && G_VALUE_TYPE (gvalue) == G_TYPE_UINT64) {
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*val = (GstClockTime) g_value_get_uint64 (gvalue);
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} else if (val && G_VALUE_TYPE (gvalue) == G_TYPE_UINT) {
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*val = (GstClockTime) g_value_get_uint (gvalue);
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} else if (val && G_VALUE_TYPE (gvalue) == G_TYPE_INT) {
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*val = (GstClockTime) g_value_get_int (gvalue);
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} else if (val && G_VALUE_TYPE (gvalue) == G_TYPE_INT64) {
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*val = (GstClockTime) g_value_get_int64 (gvalue);
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} else if (val && G_VALUE_TYPE (gvalue) == G_TYPE_DOUBLE) {
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gdouble d = g_value_get_double (gvalue);
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if (d == -1.0)
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*val = GST_CLOCK_TIME_NONE;
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else
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*val = d * GST_SECOND;
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} else if (frames && G_VALUE_TYPE (gvalue) == G_TYPE_STRING) {
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const gchar *str = g_value_get_string (gvalue);
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found = FALSE;
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if (str && str[0] == 'f') {
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GValue v = G_VALUE_INIT;
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g_value_init (&v, G_TYPE_UINT64);
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if (gst_value_deserialize (&v, &str[1])) {
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*frames = g_value_get_uint64 (&v);
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if (val)
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*val = GST_CLOCK_TIME_NONE;
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found = TRUE;
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}
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g_value_reset (&v);
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}
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} else {
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found = FALSE;
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}
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return found;
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}
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GstElementFactory *
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ges_get_compositor_factory (void)
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{
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GList *result;
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if (compositor_factory)
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return compositor_factory;
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result = gst_registry_feature_filter (gst_registry_get (),
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(GstPluginFeatureFilter) find_compositor, FALSE, NULL);
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/* sort on rank and name */
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result = g_list_sort (result, gst_plugin_feature_rank_compare_func);
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g_assert (result);
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compositor_factory = result->data;
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gst_plugin_feature_list_free (result);
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return compositor_factory;
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}
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void
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ges_idle_add (GSourceFunc func, gpointer udata, GDestroyNotify notify)
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{
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GMainContext *context = g_main_context_get_thread_default ();
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GSource *source = g_idle_source_new ();
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if (!context)
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context = g_main_context_default ();
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g_source_set_callback (source, func, udata, notify);
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g_source_attach (source, context);
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}
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gboolean
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ges_nle_composition_add_object (GstElement * comp, GstElement * object)
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{
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return gst_bin_add (GST_BIN (comp), object);
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}
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gboolean
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ges_nle_composition_remove_object (GstElement * comp, GstElement * object)
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{
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return gst_bin_remove (GST_BIN (comp), object);
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}
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gboolean
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ges_nle_object_commit (GstElement * nlesource, gboolean recurse)
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{
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gboolean ret;
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g_signal_emit_by_name (nlesource, "commit", recurse, &ret);
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return ret;
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}
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