/* GStreamer Editing Services * Copyright (C) 2009 Edward Hervey * 2009 Nokia Corporation * * 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:gestrackelement * @title: GESTrackElement * @short_description: Base Class for the elements of a #GESTrack * * A #GESTrackElement is a #GESTimelineElement that specifically belongs * to a single #GESTrack of its #GESTimelineElement:timeline. Its * #GESTimelineElement:start and #GESTimelineElement:duration specify its * temporal extent in the track. Specifically, a track element wraps some * nleobject, such as an #nlesource or #nleoperation, which can be * retrieved with ges_track_element_get_nleobject(), and its * #GESTimelineElement:start, #GESTimelineElement:duration, * #GESTimelineElement:in-point, #GESTimelineElement:priority and * #GESTrackElement:active properties expose the corresponding nleobject * properties. When a track element is added to a track, its nleobject is * added to the corresponding #nlecomposition that the track wraps. * * Most users will not have to work directly with track elements since a * #GESClip will automatically create track elements for its timeline's * tracks and take responsibility for updating them. The only track * elements that are not automatically created by clips, but a user is * likely to want to create, are #GESEffect-s. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "ges-internal.h" #include "ges-extractable.h" #include "ges-track-element.h" #include "ges-clip.h" #include "ges-meta-container.h" struct _GESTrackElementPrivate { GESTrackType track_type; GstElement *nleobject; /* The NleObject */ GstElement *element; /* The element contained in the nleobject (can be NULL) */ GESTrack *track; gboolean has_internal_source; gboolean locked; /* If TRUE, then moves in sync with its controlling * GESClip */ gboolean layer_active; GHashTable *bindings_hashtable; /* We need this if we want to be able to serialize and deserialize keyframes */ GList *creators; /* the GESClips that are considered our creators */ }; enum { PROP_0, PROP_ACTIVE, PROP_TRACK_TYPE, PROP_TRACK, PROP_HAS_INTERNAL_SOURCE, PROP_LAST }; static GParamSpec *properties[PROP_LAST]; enum { CONTROL_BINDING_ADDED, CONTROL_BINDING_REMOVED, LAST_SIGNAL }; static guint ges_track_element_signals[LAST_SIGNAL] = { 0 }; static void ges_track_element_set_asset (GESExtractable * extractable, GESAsset * asset); static void ges_extractable_interface_init (GESExtractableInterface * iface) { iface->set_asset = ges_track_element_set_asset; iface->asset_type = GES_TYPE_TRACK_ELEMENT_ASSET; } G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GESTrackElement, ges_track_element, GES_TYPE_TIMELINE_ELEMENT, G_ADD_PRIVATE (GESTrackElement) G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE, ges_extractable_interface_init)); static GstElement *ges_track_element_create_gnl_object_func (GESTrackElement * object); static gboolean _set_start (GESTimelineElement * element, GstClockTime start); static gboolean _set_inpoint (GESTimelineElement * element, GstClockTime inpoint); static gboolean _set_duration (GESTimelineElement * element, GstClockTime duration); static gboolean _set_max_duration (GESTimelineElement * element, GstClockTime max_duration); static gboolean _set_priority (GESTimelineElement * element, guint32 priority); GESTrackType _get_track_types (GESTimelineElement * object); static void _update_control_bindings (GESTimelineElement * element, GstClockTime inpoint, GstClockTime duration); static gboolean _lookup_child (GESTrackElement * object, const gchar * prop_name, GstElement ** element, GParamSpec ** pspec) { return GES_TIMELINE_ELEMENT_GET_CLASS (object)->lookup_child (GES_TIMELINE_ELEMENT (object), prop_name, (GObject **) element, pspec); } static gboolean strv_find_str (const gchar ** strv, const char *str) { guint i; if (strv == NULL) return FALSE; for (i = 0; strv[i]; i++) { if (g_strcmp0 (strv[i], str) == 0) return TRUE; } return FALSE; } static guint32 _get_layer_priority (GESTimelineElement * element) { if (!element->parent) return GES_TIMELINE_ELEMENT_NO_LAYER_PRIORITY; return ges_timeline_element_get_layer_priority (element->parent); } static gboolean _get_natural_framerate (GESTimelineElement * self, gint * framerate_n, gint * framerate_d) { GESAsset *asset = ges_extractable_get_asset (GES_EXTRACTABLE (self)); /* FIXME: asset should **never** be NULL */ if (asset && ges_track_element_asset_get_natural_framerate (GES_TRACK_ELEMENT_ASSET (asset), framerate_n, framerate_d)) return TRUE; if (self->parent) return ges_timeline_element_get_natural_framerate (self->parent, framerate_n, framerate_d); return FALSE; } static void ges_track_element_get_property (GObject * object, guint property_id, GValue * value, GParamSpec * pspec) { GESTrackElement *track_element = GES_TRACK_ELEMENT (object); switch (property_id) { case PROP_ACTIVE: g_value_set_boolean (value, ges_track_element_is_active (track_element)); break; case PROP_TRACK_TYPE: g_value_set_flags (value, track_element->priv->track_type); break; case PROP_TRACK: g_value_set_object (value, track_element->priv->track); break; case PROP_HAS_INTERNAL_SOURCE: g_value_set_boolean (value, ges_track_element_has_internal_source (track_element)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); } } static void ges_track_element_set_property (GObject * object, guint property_id, const GValue * value, GParamSpec * pspec) { GESTrackElement *track_element = GES_TRACK_ELEMENT (object); switch (property_id) { case PROP_ACTIVE: ges_track_element_set_active (track_element, g_value_get_boolean (value)); break; case PROP_TRACK_TYPE: ges_track_element_set_track_type (track_element, g_value_get_flags (value)); break; case PROP_HAS_INTERNAL_SOURCE: ges_track_element_set_has_internal_source (track_element, g_value_get_boolean (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); } } static void ges_track_element_dispose (GObject * object) { GESTrackElement *element = GES_TRACK_ELEMENT (object); GESTrackElementPrivate *priv = element->priv; if (priv->bindings_hashtable) g_hash_table_destroy (priv->bindings_hashtable); if (priv->nleobject) { GstState cstate; if (priv->track != NULL) { g_error ("%p Still in %p, this means that you forgot" " to remove it from the GESTrack it is contained in. You always need" " to remove a GESTrackElement from its track before dropping the last" " reference\n" "This problem may also be caused by a refcounting bug in" " the application or GES itself.", object, priv->track); gst_element_get_state (priv->nleobject, &cstate, NULL, 0); if (cstate != GST_STATE_NULL) gst_element_set_state (priv->nleobject, GST_STATE_NULL); } g_object_set_qdata (G_OBJECT (priv->nleobject), NLE_OBJECT_TRACK_ELEMENT_QUARK, NULL); gst_object_unref (priv->nleobject); priv->nleobject = NULL; } G_OBJECT_CLASS (ges_track_element_parent_class)->dispose (object); } static void ges_track_element_finalize (GObject * object) { GESTrackElement *self = GES_TRACK_ELEMENT (object); ges_track_element_clear_creators (self); G_OBJECT_CLASS (ges_track_element_parent_class)->finalize (object); } static void ges_track_element_set_asset (GESExtractable * extractable, GESAsset * asset) { GESTrackElementClass *class; GstElement *nleobject; gdouble media_duration_factor; gchar *tmp; GESTrackElement *object = GES_TRACK_ELEMENT (extractable); if (ges_track_element_get_track_type (object) == GES_TRACK_TYPE_UNKNOWN) { ges_track_element_set_track_type (object, ges_track_element_asset_get_track_type (GES_TRACK_ELEMENT_ASSET (asset))); } class = GES_TRACK_ELEMENT_GET_CLASS (object); g_assert (class->create_gnl_object); nleobject = class->create_gnl_object (object); if (G_UNLIKELY (nleobject == NULL)) { GST_ERROR_OBJECT (object, "Could not create NleObject"); return; } tmp = g_strdup_printf ("%s:%s", G_OBJECT_TYPE_NAME (object), GST_OBJECT_NAME (nleobject)); gst_object_set_name (GST_OBJECT (nleobject), tmp); g_free (tmp); object->priv->nleobject = gst_object_ref (nleobject); g_object_set_qdata (G_OBJECT (nleobject), NLE_OBJECT_TRACK_ELEMENT_QUARK, object); /* Set some properties on the NleObject */ g_object_set (object->priv->nleobject, "start", GES_TIMELINE_ELEMENT_START (object), "inpoint", GES_TIMELINE_ELEMENT_INPOINT (object), "duration", GES_TIMELINE_ELEMENT_DURATION (object), "priority", GES_TIMELINE_ELEMENT_PRIORITY (object), "active", object->active & object->priv->layer_active, NULL); media_duration_factor = ges_timeline_element_get_media_duration_factor (GES_TIMELINE_ELEMENT (object)); g_object_set (object->priv->nleobject, "media-duration-factor", media_duration_factor, NULL); } static void ges_track_element_constructed (GObject * object) { GESTrackElement *self = GES_TRACK_ELEMENT (object); if (self->priv->track_type == GES_TRACK_TYPE_UNKNOWN) ges_track_element_set_track_type (GES_TRACK_ELEMENT (object), GES_TRACK_ELEMENT_GET_CLASS (object)->ABI.abi.default_track_type); /* set the default has-internal-source */ ges_track_element_set_has_internal_source (self, GES_TRACK_ELEMENT_CLASS_DEFAULT_HAS_INTERNAL_SOURCE (GES_TRACK_ELEMENT_GET_CLASS (object))); G_OBJECT_CLASS (ges_track_element_parent_class)->constructed (object); } static void ges_track_element_class_init (GESTrackElementClass * klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); GESTimelineElementClass *element_class = GES_TIMELINE_ELEMENT_CLASS (klass); object_class->get_property = ges_track_element_get_property; object_class->set_property = ges_track_element_set_property; object_class->dispose = ges_track_element_dispose; object_class->finalize = ges_track_element_finalize; object_class->constructed = ges_track_element_constructed; /** * GESTrackElement:active: * * Whether the effect of the element should be applied in its * #GESTrackElement:track. If set to %FALSE, it will not be used in * the output of the track. */ properties[PROP_ACTIVE] = g_param_spec_boolean ("active", "Active", "Use object in output", TRUE, G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY); g_object_class_install_property (object_class, PROP_ACTIVE, properties[PROP_ACTIVE]); /** * GESTrackElement:track-type: * * The track type of the element, which determines the type of track the * element can be added to (see #GESTrack:track-type). This should * correspond to the type of data that the element can produce or * process. */ properties[PROP_TRACK_TYPE] = g_param_spec_flags ("track-type", "Track Type", "The track type of the object", GES_TYPE_TRACK_TYPE, GES_TRACK_TYPE_UNKNOWN, G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_EXPLICIT_NOTIFY); g_object_class_install_property (object_class, PROP_TRACK_TYPE, properties[PROP_TRACK_TYPE]); /** * GESTrackElement:track: * * The track that this element belongs to, or %NULL if it does not * belong to a track. */ properties[PROP_TRACK] = g_param_spec_object ("track", "Track", "The track the object is in", GES_TYPE_TRACK, G_PARAM_READABLE); g_object_class_install_property (object_class, PROP_TRACK, properties[PROP_TRACK]); /** * GESTrackElement:has-internal-source: * * This property is used to determine whether the 'internal time' * properties of the element have any meaning. In particular, unless * this is set to %TRUE, the #GESTimelineElement:in-point and * #GESTimelineElement:max-duration can not be set to any value other * than the default 0 and #GST_CLOCK_TIME_NONE, respectively. * * If an element has some *internal* *timed* source #GstElement that it * reads stream data from as part of its function in a #GESTrack, then * you'll likely want to set this to %TRUE to allow the * #GESTimelineElement:in-point and #GESTimelineElement:max-duration to * be set. * * The default value is determined by the #GESTrackElementClass * @default_has_internal_source class property. For most * #GESSourceClass-es, this will be %TRUE, with the exception of those * that have a potentially *static* source, such as #GESImageSourceClass * and #GESTitleSourceClass. Otherwise, this will usually be %FALSE. * * For most #GESOperation-s you will likely want to leave this set to * %FALSE. The exception may be for an operation that reads some stream * data from some private internal source as part of manipulating the * input data from the usual linked upstream #GESTrackElement. * * For example, you may want to set this to %TRUE for a * #GES_TRACK_TYPE_VIDEO operation that wraps a #textoverlay that reads * from a subtitle file and places its text on top of the received video * data. The #GESTimelineElement:in-point of the element would be used * to shift the initial seek time on the #textoverlay away from 0, and * the #GESTimelineElement:max-duration could be set to reflect the * time at which the subtitle file runs out of data. * * Note that GES can not support track elements that have both internal * content and manipulate the timing of their data streams (time * effects). */ properties[PROP_HAS_INTERNAL_SOURCE] = g_param_spec_boolean ("has-internal-source", "Has Internal Source", "Whether the element has some internal source of stream data", FALSE, G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY); g_object_class_install_property (object_class, PROP_HAS_INTERNAL_SOURCE, properties[PROP_HAS_INTERNAL_SOURCE]); /** * GESTrackElement::control-binding-added: * @track_element: A #GESTrackElement * @control_binding: The control binding that has been added * * This is emitted when a control binding is added to a child property * of the track element. */ ges_track_element_signals[CONTROL_BINDING_ADDED] = g_signal_new ("control-binding-added", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, 0, NULL, NULL, NULL, G_TYPE_NONE, 1, GST_TYPE_CONTROL_BINDING); /** * GESTrackElement::control-binding-removed: * @track_element: A #GESTrackElement * @control_binding: The control binding that has been removed * * This is emitted when a control binding is removed from a child * property of the track element. */ ges_track_element_signals[CONTROL_BINDING_REMOVED] = g_signal_new ("control-binding-removed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, 0, NULL, NULL, NULL, G_TYPE_NONE, 1, GST_TYPE_CONTROL_BINDING); element_class->set_start = _set_start; element_class->set_duration = _set_duration; element_class->set_inpoint = _set_inpoint; element_class->set_max_duration = _set_max_duration; element_class->set_priority = _set_priority; element_class->get_track_types = _get_track_types; element_class->deep_copy = ges_track_element_copy_properties; element_class->get_layer_priority = _get_layer_priority; element_class->get_natural_framerate = _get_natural_framerate; klass->create_gnl_object = ges_track_element_create_gnl_object_func; klass->lookup_child = _lookup_child; klass->ABI.abi.default_track_type = GES_TRACK_TYPE_UNKNOWN; } static void ges_track_element_init (GESTrackElement * self) { GESTrackElementPrivate *priv = self->priv = ges_track_element_get_instance_private (self); /* Sane default values */ GES_TIMELINE_ELEMENT_START (self) = 0; GES_TIMELINE_ELEMENT_INPOINT (self) = 0; GES_TIMELINE_ELEMENT_DURATION (self) = GST_SECOND; GES_TIMELINE_ELEMENT_PRIORITY (self) = 0; self->active = TRUE; self->priv->layer_active = TRUE; priv->bindings_hashtable = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL); /* NOTE: make sure we set this flag to TRUE so that * g_object_new (, "has-internal-source", TRUE, "in-point", 10, NULL); * can succeed. The problem is that "in-point" will always be set before * has-internal-source is set, so we first assume that it is TRUE. * Note that if we call * g_object_new (, "has-internal-source", FALSE, "in-point", 10, NULL); * then "in-point" will be allowed to be set, but then when * "has-internal-source" is later set to TRUE, this will set the * "in-point" back to 0. * This is particularly needed for the ges_timeline_element_copy method * because it calls g_object_new_with_properties. */ self->priv->has_internal_source = TRUE; } static gfloat interpolate_values_for_position (GstTimedValue * first_value, GstTimedValue * second_value, guint64 position, gboolean absolute) { gfloat diff; GstClockTime interval; gfloat value_at_pos; g_assert (second_value || first_value); if (first_value == NULL) return second_value->value; if (second_value == NULL) return first_value->value; diff = second_value->value - first_value->value; interval = second_value->timestamp - first_value->timestamp; if (position > first_value->timestamp) value_at_pos = first_value->value + ((float) (position - first_value->timestamp) / (float) interval) * diff; else value_at_pos = first_value->value - ((float) (first_value->timestamp - position) / (float) interval) * diff; if (!absolute) value_at_pos = CLAMP (value_at_pos, 0.0, 1.0); return value_at_pos; } static void _update_control_bindings (GESTimelineElement * element, GstClockTime inpoint, GstClockTime duration) { GParamSpec **specs; guint n, n_specs; GstControlBinding *binding; GstTimedValueControlSource *source; GESTrackElement *self = GES_TRACK_ELEMENT (element); specs = ges_track_element_list_children_properties (self, &n_specs); for (n = 0; n < n_specs; ++n) { GList *values, *tmp; gboolean absolute; GstTimedValue *last, *first, *prev = NULL, *next = NULL; gfloat value_at_pos; binding = ges_track_element_get_control_binding (self, specs[n]->name); if (!binding) continue; g_object_get (binding, "control_source", &source, NULL); g_object_get (binding, "absolute", &absolute, NULL); if (duration == 0) { gst_timed_value_control_source_unset_all (GST_TIMED_VALUE_CONTROL_SOURCE (source)); continue; } values = gst_timed_value_control_source_get_all (GST_TIMED_VALUE_CONTROL_SOURCE (source)); if (g_list_length (values) == 0) continue; first = values->data; for (tmp = values->next; tmp; tmp = tmp->next) { next = tmp->data; if (next->timestamp > inpoint) break; } g_list_free (values); value_at_pos = interpolate_values_for_position (first, next, inpoint, absolute); gst_timed_value_control_source_unset (source, first->timestamp); gst_timed_value_control_source_set (source, inpoint, value_at_pos); values = gst_timed_value_control_source_get_all (GST_TIMED_VALUE_CONTROL_SOURCE (source)); if (duration != GST_CLOCK_TIME_NONE) { last = g_list_last (values)->data; for (tmp = g_list_last (values)->prev; tmp; tmp = tmp->prev) { prev = tmp->data; if (prev->timestamp < duration + inpoint) break; } g_list_free (values); value_at_pos = interpolate_values_for_position (prev, last, duration + inpoint, absolute); gst_timed_value_control_source_unset (source, last->timestamp); gst_timed_value_control_source_set (source, duration + inpoint, value_at_pos); values = gst_timed_value_control_source_get_all (GST_TIMED_VALUE_CONTROL_SOURCE (source)); } for (tmp = values; tmp; tmp = tmp->next) { GstTimedValue *value = tmp->data; if (value->timestamp < inpoint) gst_timed_value_control_source_unset (source, value->timestamp); else if (duration != GST_CLOCK_TIME_NONE && value->timestamp > duration + inpoint) gst_timed_value_control_source_unset (source, value->timestamp); } g_list_free (values); } g_free (specs); } static gboolean _set_start (GESTimelineElement * element, GstClockTime start) { GESTrackElement *object = GES_TRACK_ELEMENT (element); g_return_val_if_fail (object->priv->nleobject, FALSE); g_object_set (object->priv->nleobject, "start", start, NULL); return TRUE; } static gboolean _set_inpoint (GESTimelineElement * element, GstClockTime inpoint) { GESTrackElement *object = GES_TRACK_ELEMENT (element); g_return_val_if_fail (object->priv->nleobject, FALSE); if (inpoint && !object->priv->has_internal_source) { GST_WARNING_OBJECT (element, "Can not set an in-point for a track " "element that is not registered with internal content"); return FALSE; } if (GES_IS_CLIP (element->parent) && !ges_clip_can_set_inpoint_of_child (GES_CLIP (element->parent), element, inpoint)) { GST_WARNING_OBJECT (element, "Can not set an in-point of %" GST_TIME_FORMAT " because the parent clip %" GES_FORMAT " would not be able to follow", GST_TIME_ARGS (inpoint), GES_ARGS (element->parent)); return FALSE; } g_object_set (object->priv->nleobject, "inpoint", inpoint, NULL); _update_control_bindings (element, inpoint, GST_CLOCK_TIME_NONE); return TRUE; } static gboolean _set_duration (GESTimelineElement * element, GstClockTime duration) { GESTrackElement *object = GES_TRACK_ELEMENT (element); GESTrackElementPrivate *priv = object->priv; g_return_val_if_fail (object->priv->nleobject, FALSE); if (GST_CLOCK_TIME_IS_VALID (_MAXDURATION (element)) && duration > _INPOINT (object) + _MAXDURATION (element)) duration = _MAXDURATION (element) - _INPOINT (object); g_object_set (priv->nleobject, "duration", duration, NULL); _update_control_bindings (element, ges_timeline_element_get_inpoint (element), duration); return TRUE; } static gboolean _set_max_duration (GESTimelineElement * element, GstClockTime max_duration) { GESTrackElement *object = GES_TRACK_ELEMENT (element); if (GST_CLOCK_TIME_IS_VALID (max_duration) && !object->priv->has_internal_source) { GST_WARNING_OBJECT (element, "Can not set a max-duration for a track " "element that is not registered with internal content"); return FALSE; } return TRUE; } static gboolean _set_priority (GESTimelineElement * element, guint32 priority) { GESTrackElement *object = GES_TRACK_ELEMENT (element); g_return_val_if_fail (object->priv->nleobject, FALSE); if (priority < MIN_NLE_PRIO) { GST_INFO_OBJECT (element, "Priority (%d) < MIN_NLE_PRIO, setting it to %d", priority, MIN_NLE_PRIO); priority = MIN_NLE_PRIO; } GST_DEBUG_OBJECT (object, "priority:%" G_GUINT32_FORMAT, priority); if (G_UNLIKELY (priority == _PRIORITY (object))) return FALSE; g_object_set (object->priv->nleobject, "priority", priority, NULL); return TRUE; } GESTrackType _get_track_types (GESTimelineElement * object) { return ges_track_element_get_track_type (GES_TRACK_ELEMENT (object)); } /** * ges_track_element_set_active: * @object: A #GESTrackElement * @active: Whether @object should be active in its track * * Sets #GESTrackElement:active for the element. * * Returns: %TRUE if the property was *toggled*. */ gboolean ges_track_element_set_active (GESTrackElement * object, gboolean active) { g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE); g_return_val_if_fail (object->priv->nleobject, FALSE); GST_DEBUG_OBJECT (object, "object:%p, active:%d", object, active); if (G_UNLIKELY (active == object->active)) return FALSE; g_object_set (object->priv->nleobject, "active", active & object->priv->layer_active, NULL); object->active = active; if (GES_TRACK_ELEMENT_GET_CLASS (object)->active_changed) GES_TRACK_ELEMENT_GET_CLASS (object)->active_changed (object, active); g_object_notify_by_pspec (G_OBJECT (object), properties[PROP_ACTIVE]); return TRUE; } /** * ges_track_element_set_has_internal_source: * @object: A #GESTrackElement * @has_internal_source: Whether the @object should be allowed to have its * 'internal time' properties set. * * Sets #GESTrackElement:has-internal-source for the element. If this is * set to %FALSE, this method will also set the * #GESTimelineElement:in-point of the element to 0 and its * #GESTimelineElement:max-duration to #GST_CLOCK_TIME_NONE. */ void ges_track_element_set_has_internal_source (GESTrackElement * object, gboolean has_internal_source) { GESTimelineElement *element; g_return_if_fail (GES_IS_TRACK_ELEMENT (object)); GST_DEBUG_OBJECT (object, "object:%p, has-internal-source: %s", object, has_internal_source ? "TRUE" : "FALSE"); if (G_UNLIKELY (has_internal_source == object->priv->has_internal_source)) return; object->priv->has_internal_source = has_internal_source; if (!has_internal_source) { element = GES_TIMELINE_ELEMENT (object); ges_timeline_element_set_inpoint (element, 0); ges_timeline_element_set_max_duration (element, GST_CLOCK_TIME_NONE); } g_object_notify_by_pspec (G_OBJECT (object), properties[PROP_HAS_INTERNAL_SOURCE]); } /** * ges_track_element_set_track_type: * @object: A #GESTrackElement * @type: The new track-type for @object * * Sets the #GESTrackElement:track-type for the element. */ void ges_track_element_set_track_type (GESTrackElement * object, GESTrackType type) { g_return_if_fail (GES_IS_TRACK_ELEMENT (object)); if (object->priv->track_type != type) { object->priv->track_type = type; g_object_notify_by_pspec (G_OBJECT (object), properties[PROP_TRACK_TYPE]); } } /** * ges_track_element_get_track_type: * @object: A #GESTrackElement * * Gets the #GESTrackElement:track-type for the element. * * Returns: The track-type of @object. */ GESTrackType ges_track_element_get_track_type (GESTrackElement * object) { g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), GES_TRACK_TYPE_UNKNOWN); return object->priv->track_type; } /* default 'create_gnl_object' virtual method implementation */ static GstElement * ges_track_element_create_gnl_object_func (GESTrackElement * self) { GESTrackElementClass *klass = NULL; GstElement *child = NULL; GstElement *nleobject; klass = GES_TRACK_ELEMENT_GET_CLASS (self); if (G_UNLIKELY (self->priv->nleobject != NULL)) goto already_have_nleobject; if (G_UNLIKELY (klass->nleobject_factorytype == NULL)) goto no_nlefactory; GST_DEBUG ("Creating a supporting nleobject of type '%s'", klass->nleobject_factorytype); nleobject = gst_element_factory_make (klass->nleobject_factorytype, NULL); if (G_UNLIKELY (nleobject == NULL)) goto no_nleobject; if (klass->create_element) { GST_DEBUG ("Calling subclass 'create_element' vmethod"); child = klass->create_element (self); if (G_UNLIKELY (!child)) goto child_failure; if (!gst_bin_add (GST_BIN (nleobject), child)) goto add_failure; GST_DEBUG ("Succesfully got the element to put in the nleobject"); self->priv->element = child; } GST_DEBUG ("done"); return nleobject; /* ERROR CASES */ already_have_nleobject: { GST_ERROR ("Already controlling a NleObject %s", GST_ELEMENT_NAME (self->priv->nleobject)); return NULL; } no_nlefactory: { GST_ERROR ("No GESTrackElement::nleobject_factorytype implementation!"); return NULL; } no_nleobject: { GST_ERROR ("Error creating a nleobject of type '%s'", klass->nleobject_factorytype); return NULL; } child_failure: { GST_ERROR ("create_element returned NULL"); gst_object_unref (nleobject); return NULL; } add_failure: { GST_ERROR ("Error adding the contents to the nleobject"); gst_object_unref (child); gst_object_unref (nleobject); return NULL; } } static void ges_track_element_add_child_props (GESTrackElement * self, GstElement * child, const gchar ** wanted_categories, const gchar ** blacklist, const gchar ** whitelist) { GstElementFactory *factory; const gchar *klass; GParamSpec **parray; GObjectClass *gobject_klass; gchar **categories; guint i; factory = gst_element_get_factory (child); /* FIXME: handle NULL factory */ klass = gst_element_factory_get_metadata (factory, GST_ELEMENT_METADATA_KLASS); if (strv_find_str (blacklist, GST_OBJECT_NAME (factory))) { GST_DEBUG_OBJECT (self, "%s blacklisted", GST_OBJECT_NAME (factory)); return; } GST_DEBUG_OBJECT (self, "Looking at element '%s' of klass '%s'", GST_ELEMENT_NAME (child), klass); categories = g_strsplit (klass, "/", 0); for (i = 0; categories[i]; i++) { if ((!wanted_categories || strv_find_str (wanted_categories, categories[i]))) { guint i, nb_specs; gobject_klass = G_OBJECT_GET_CLASS (child); parray = g_object_class_list_properties (gobject_klass, &nb_specs); for (i = 0; i < nb_specs; i++) { if ((!whitelist && (parray[i]->flags & G_PARAM_WRITABLE)) || (strv_find_str (whitelist, parray[i]->name))) { ges_timeline_element_add_child_property (GES_TIMELINE_ELEMENT (self), parray[i], G_OBJECT (child)); } } g_free (parray); GST_DEBUG ("%d configurable properties of '%s' added to property hashtable", nb_specs, GST_ELEMENT_NAME (child)); break; } } g_strfreev (categories); } /** * ges_track_element_add_children_props: * @self: A #GESTrackElement * @element: The child object to retrieve properties from * @wanted_categories: (array zero-terminated=1) (transfer none) (allow-none): * An array of element factory "klass" categories to whitelist, or %NULL * to accept all categories * @blacklist: (array zero-terminated=1) (transfer none) (allow-none): A * blacklist of element factory names, or %NULL to not blacklist any * element factory * @whitelist: (array zero-terminated=1) (transfer none) (allow-none): A * whitelist of element property names, or %NULL to whitelist all * writeable properties * * Adds all the properties of a #GstElement that match the criteria as * children properties of the track element. If the name of @element's * #GstElementFactory is not in @blacklist, and the factory's * #GST_ELEMENT_METADATA_KLASS contains at least one member of * @wanted_categories (e.g. #GST_ELEMENT_FACTORY_KLASS_DECODER), then * all the properties of @element that are also in @whitelist are added as * child properties of @self using * ges_timeline_element_add_child_property(). * * This is intended to be used by subclasses when constructing. */ void ges_track_element_add_children_props (GESTrackElement * self, GstElement * element, const gchar ** wanted_categories, const gchar ** blacklist, const gchar ** whitelist) { GValue item = { 0, }; GstIterator *it; gboolean done = FALSE; if (!GST_IS_BIN (element)) { ges_track_element_add_child_props (self, element, wanted_categories, blacklist, whitelist); return; } /* We go over child elements recursivly, and add writable properties to the * hashtable */ it = gst_bin_iterate_recurse (GST_BIN (element)); while (!done) { switch (gst_iterator_next (it, &item)) { case GST_ITERATOR_OK: { GstElement *child = g_value_get_object (&item); ges_track_element_add_child_props (self, child, wanted_categories, blacklist, whitelist); g_value_reset (&item); break; } case GST_ITERATOR_RESYNC: /* FIXME, properly restart the process */ GST_DEBUG ("iterator resync"); gst_iterator_resync (it); break; case GST_ITERATOR_DONE: GST_DEBUG ("iterator done"); done = TRUE; break; default: break; } g_value_unset (&item); } gst_iterator_free (it); } /* INTERNAL USAGE */ gboolean ges_track_element_set_track (GESTrackElement * object, GESTrack * track) { GESTimelineElement *parent = GES_TIMELINE_ELEMENT_PARENT (object); g_return_val_if_fail (object->priv->nleobject, FALSE); GST_DEBUG_OBJECT (object, "new track: %" GST_PTR_FORMAT, track); if (GES_IS_CLIP (parent) && !ges_clip_can_set_track_of_child (GES_CLIP (parent), object, track)) { GST_WARNING_OBJECT (object, "The parent clip %" GES_FORMAT " would " "not allow the track to be set to %" GST_PTR_FORMAT, GES_ARGS (parent), track); return FALSE; } object->priv->track = track; if (object->priv->track) { ges_track_element_set_track_type (object, track->type); g_object_set (object->priv->nleobject, "caps", ges_track_get_caps (object->priv->track), NULL); } g_object_notify_by_pspec (G_OBJECT (object), properties[PROP_TRACK]); return TRUE; } void ges_track_element_set_layer_active (GESTrackElement * element, gboolean active) { if (element->priv->layer_active == active) return; element->priv->layer_active = active; g_object_set (element->priv->nleobject, "active", active & element->active, NULL); } /** * ges_track_element_get_all_control_bindings * @trackelement: A #GESTrackElement * * Get all the control bindings that have been created for the children * properties of the track element using * ges_track_element_set_control_source(). The keys used in the returned * hash table are the child property names that were passed to * ges_track_element_set_control_source(), and their values are the * corresponding created #GstControlBinding. * * Returns: (element-type gchar* GstControlBinding)(transfer none): A * hash table containing all child-property-name/control-binding pairs * for @trackelement. */ GHashTable * ges_track_element_get_all_control_bindings (GESTrackElement * trackelement) { GESTrackElementPrivate *priv = GES_TRACK_ELEMENT (trackelement)->priv; return priv->bindings_hashtable; } /** * ges_track_element_get_track: * @object: A #GESTrackElement * * Get the #GESTrackElement:track for the element. * * Returns: (transfer none) (nullable): The track that @object belongs to, * or %NULL if it does not belong to a track. */ GESTrack * ges_track_element_get_track (GESTrackElement * object) { g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), NULL); return object->priv->track; } /** * ges_track_element_get_gnlobject: * @object: A #GESTrackElement * * Get the GNonLin object this object is controlling. * * Returns: (transfer none): The GNonLin object this object is controlling. * * Deprecated: use #ges_track_element_get_nleobject instead. */ GstElement * ges_track_element_get_gnlobject (GESTrackElement * object) { g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), NULL); return object->priv->nleobject; } /** * ges_track_element_get_nleobject: * @object: A #GESTrackElement * * Get the nleobject that this element wraps. * * Returns: (transfer none): The nleobject that @object wraps. * * Since: 1.6 */ GstElement * ges_track_element_get_nleobject (GESTrackElement * object) { g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), NULL); return object->priv->nleobject; } /** * ges_track_element_get_element: * @object: A #GESTrackElement * * Get the #GstElement that the track element's underlying nleobject * controls. * * Returns: (transfer none): The #GstElement being controlled by the * nleobject that @object wraps. */ GstElement * ges_track_element_get_element (GESTrackElement * object) { g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), NULL); return object->priv->element; } /** * ges_track_element_is_active: * @object: A #GESTrackElement * * Gets #GESTrackElement:active for the element. * * Returns: %TRUE if @object is active in its track. */ gboolean ges_track_element_is_active (GESTrackElement * object) { g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE); g_return_val_if_fail (object->priv->nleobject, FALSE); return object->active; } /** * ges_track_element_has_internal_source: * @object: A #GESTrackElement * * Gets #GESTrackElement:has-internal-source for the element. * * Returns: %TRUE if @object can have its 'internal time' properties set. */ gboolean ges_track_element_has_internal_source (GESTrackElement * object) { g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE); return object->priv->has_internal_source; } /** * ges_track_element_lookup_child: * @object: Object to lookup the property in * @prop_name: Name of the property to look up. You can specify the name of the * class as such: "ClassName::property-name", to guarantee that you get the * proper GParamSpec in case various GstElement-s contain the same property * name. If you don't do so, you will get the first element found, having * this property and the and the corresponding GParamSpec. * @element: (out) (allow-none) (transfer full): pointer to a #GstElement that * takes the real object to set property on * @pspec: (out) (allow-none) (transfer full): pointer to take the specification * describing the property * * Looks up which @element and @pspec would be effected by the given @name. If various * contained elements have this property name you will get the first one, unless you * specify the class name in @name. * * Returns: TRUE if @element and @pspec could be found. FALSE otherwise. In that * case the values for @pspec and @element are not modified. Unref @element after * usage. * * Deprecated: Use #ges_timeline_element_lookup_child */ gboolean ges_track_element_lookup_child (GESTrackElement * object, const gchar * prop_name, GstElement ** element, GParamSpec ** pspec) { return ges_timeline_element_lookup_child (GES_TIMELINE_ELEMENT (object), prop_name, ((GObject **) element), pspec); } /** * ges_track_element_set_child_property_by_pspec: (skip): * @object: A #GESTrackElement * @pspec: The #GParamSpec that specifies the property you want to set * @value: The value * * Sets a property of a child of @object. * * Deprecated: Use #ges_timeline_element_set_child_property_by_spec */ void ges_track_element_set_child_property_by_pspec (GESTrackElement * object, GParamSpec * pspec, GValue * value) { g_return_if_fail (GES_IS_TRACK_ELEMENT (object)); ges_timeline_element_set_child_property_by_pspec (GES_TIMELINE_ELEMENT (object), pspec, value); return; } /** * ges_track_element_set_child_property_valist: (skip): * @object: The #GESTrackElement parent object * @first_property_name: The name of the first property to set * @var_args: Value for the first property, followed optionally by more * name/return location pairs, followed by NULL * * Sets a property of a child of @object. If there are various child elements * that have the same property name, you can distinguish them using the following * syntax: 'ClasseName::property_name' as property name. If you don't, the * corresponding property of the first element found will be set. * * Deprecated: Use #ges_timeline_element_set_child_property_valist */ void ges_track_element_set_child_property_valist (GESTrackElement * object, const gchar * first_property_name, va_list var_args) { ges_timeline_element_set_child_property_valist (GES_TIMELINE_ELEMENT (object), first_property_name, var_args); } /** * ges_track_element_set_child_properties: (skip): * @object: The #GESTrackElement parent object * @first_property_name: The name of the first property to set * @...: value for the first property, followed optionally by more * name/return location pairs, followed by NULL * * Sets a property of a child of @object. If there are various child elements * that have the same property name, you can distinguish them using the following * syntax: 'ClasseName::property_name' as property name. If you don't, the * corresponding property of the first element found will be set. * * Deprecated: Use #ges_timeline_element_set_child_properties */ void ges_track_element_set_child_properties (GESTrackElement * object, const gchar * first_property_name, ...) { va_list var_args; g_return_if_fail (GES_IS_TRACK_ELEMENT (object)); va_start (var_args, first_property_name); ges_track_element_set_child_property_valist (object, first_property_name, var_args); va_end (var_args); } /** * ges_track_element_get_child_property_valist: (skip): * @object: The #GESTrackElement parent object * @first_property_name: The name of the first property to get * @var_args: Value for the first property, followed optionally by more * name/return location pairs, followed by NULL * * Gets a property of a child of @object. If there are various child elements * that have the same property name, you can distinguish them using the following * syntax: 'ClasseName::property_name' as property name. If you don't, the * corresponding property of the first element found will be set. * * Deprecated: Use #ges_timeline_element_get_child_property_valist */ void ges_track_element_get_child_property_valist (GESTrackElement * object, const gchar * first_property_name, va_list var_args) { ges_timeline_element_get_child_property_valist (GES_TIMELINE_ELEMENT (object), first_property_name, var_args); } /** * ges_track_element_list_children_properties: * @object: The #GESTrackElement to get the list of children properties from * @n_properties: (out): return location for the length of the returned array * * Gets an array of #GParamSpec* for all configurable properties of the * children of @object. * * Returns: (transfer full) (array length=n_properties): An array of #GParamSpec* which should be freed after use or * %NULL if something went wrong. * * Deprecated: Use #ges_timeline_element_list_children_properties */ GParamSpec ** ges_track_element_list_children_properties (GESTrackElement * object, guint * n_properties) { return ges_timeline_element_list_children_properties (GES_TIMELINE_ELEMENT (object), n_properties); } /** * ges_track_element_get_child_properties: (skip): * @object: The origin #GESTrackElement * @first_property_name: The name of the first property to get * @...: return location for the first property, followed optionally by more * name/return location pairs, followed by NULL * * Gets properties of a child of @object. * * Deprecated: Use #ges_timeline_element_get_child_properties */ void ges_track_element_get_child_properties (GESTrackElement * object, const gchar * first_property_name, ...) { va_list var_args; g_return_if_fail (GES_IS_TRACK_ELEMENT (object)); va_start (var_args, first_property_name); ges_track_element_get_child_property_valist (object, first_property_name, var_args); va_end (var_args); } /** * ges_track_element_get_child_property_by_pspec: (skip): * @object: A #GESTrackElement * @pspec: The #GParamSpec that specifies the property you want to get * @value: (out): return location for the value * * Gets a property of a child of @object. * * Deprecated: Use #ges_timeline_element_get_child_property_by_pspec */ void ges_track_element_get_child_property_by_pspec (GESTrackElement * object, GParamSpec * pspec, GValue * value) { ges_timeline_element_get_child_property_by_pspec (GES_TIMELINE_ELEMENT (object), pspec, value); } /** * ges_track_element_set_child_property: (skip): * @object: The origin #GESTrackElement * @property_name: The name of the property * @value: The value * * Sets a property of a GstElement contained in @object. * * Note that #ges_track_element_set_child_property is really * intended for language bindings, #ges_track_element_set_child_properties * is much more convenient for C programming. * * Returns: %TRUE if the property was set, %FALSE otherwize. * * Deprecated: use #ges_timeline_element_set_child_property instead */ gboolean ges_track_element_set_child_property (GESTrackElement * object, const gchar * property_name, GValue * value) { return ges_timeline_element_set_child_property (GES_TIMELINE_ELEMENT (object), property_name, value); } /** * ges_track_element_get_child_property: (skip): * @object: The origin #GESTrackElement * @property_name: The name of the property * @value: (out): return location for the property value, it will * be initialized if it is initialized with 0 * * In general, a copy is made of the property contents and * the caller is responsible for freeing the memory by calling * g_value_unset(). * * Gets a property of a GstElement contained in @object. * * Note that #ges_track_element_get_child_property is really * intended for language bindings, #ges_track_element_get_child_properties * is much more convenient for C programming. * * Returns: %TRUE if the property was found, %FALSE otherwize. * * Deprecated: Use #ges_timeline_element_get_child_property */ gboolean ges_track_element_get_child_property (GESTrackElement * object, const gchar * property_name, GValue * value) { return ges_timeline_element_get_child_property (GES_TIMELINE_ELEMENT (object), property_name, value); } void ges_track_element_copy_properties (GESTimelineElement * element, GESTimelineElement * elementcopy) { GParamSpec **specs; guint n, n_specs; GValue val = { 0 }; GESTrackElement *copy = GES_TRACK_ELEMENT (elementcopy); specs = ges_track_element_list_children_properties (GES_TRACK_ELEMENT (element), &n_specs); for (n = 0; n < n_specs; ++n) { if (!(specs[n]->flags & G_PARAM_WRITABLE)) continue; g_value_init (&val, specs[n]->value_type); ges_track_element_get_child_property_by_pspec (GES_TRACK_ELEMENT (element), specs[n], &val); ges_track_element_set_child_property_by_pspec (copy, specs[n], &val); g_value_unset (&val); } g_free (specs); } static void creator_disposed (GESTrackElement * self, GObject * creator) { self->priv->creators = g_list_remove (self->priv->creators, creator); } void ges_track_element_add_creator (GESTrackElement * self, GESClip * creator) { if (!g_list_find (self->priv->creators, creator)) { self->priv->creators = g_list_prepend (self->priv->creators, creator); g_object_weak_ref (G_OBJECT (creator), (GWeakNotify) creator_disposed, self); } } void ges_track_element_clear_creators (GESTrackElement * self) { GList *tmp; for (tmp = self->priv->creators; tmp; tmp = tmp->next) g_object_weak_unref (tmp->data, (GWeakNotify) creator_disposed, self); g_list_free (self->priv->creators); self->priv->creators = NULL; } GList * ges_track_element_get_creators (GESTrackElement * self) { return self->priv->creators; } static void _split_binding (GESTrackElement * element, GESTrackElement * new_element, guint64 position, GstTimedValueControlSource * source, GstTimedValueControlSource * new_source, gboolean absolute) { GstTimedValue *last_value = NULL; gboolean past_position = FALSE; GList *values, *tmp; values = gst_timed_value_control_source_get_all (GST_TIMED_VALUE_CONTROL_SOURCE (source)); for (tmp = values; tmp; tmp = tmp->next) { GstTimedValue *value = tmp->data; if (value->timestamp > position && !past_position) { gfloat value_at_pos; /* FIXME We should be able to use gst_control_source_get_value so * all modes are handled. Right now that method only works if the value * we are looking for is between two actual keyframes which is not enough * in our case. bug #706621 */ value_at_pos = interpolate_values_for_position (last_value, value, position, absolute); past_position = TRUE; gst_timed_value_control_source_set (new_source, position, value_at_pos); gst_timed_value_control_source_set (new_source, value->timestamp, value->value); gst_timed_value_control_source_unset (source, value->timestamp); gst_timed_value_control_source_set (source, position, value_at_pos); } else if (past_position) { gst_timed_value_control_source_set (new_source, value->timestamp, value->value); gst_timed_value_control_source_unset (source, value->timestamp); } last_value = value; } g_list_free (values); } static void _copy_binding (GESTrackElement * element, GESTrackElement * new_element, guint64 position, GstTimedValueControlSource * source, GstTimedValueControlSource * new_source, gboolean absolute) { GList *values, *tmp; values = gst_timed_value_control_source_get_all (GST_TIMED_VALUE_CONTROL_SOURCE (source)); for (tmp = values; tmp; tmp = tmp->next) { GstTimedValue *value = tmp->data; gst_timed_value_control_source_set (new_source, value->timestamp, value->value); } g_list_free (values); } /* position == GST_CLOCK_TIME_NONE means that we do a simple copy * other position means that the function will do a splitting * and thus interpollate the values in the element and new_element */ void ges_track_element_copy_bindings (GESTrackElement * element, GESTrackElement * new_element, guint64 position) { GParamSpec **specs; guint n, n_specs; gboolean absolute; GstControlBinding *binding; GstTimedValueControlSource *source, *new_source; specs = ges_track_element_list_children_properties (GES_TRACK_ELEMENT (element), &n_specs); for (n = 0; n < n_specs; ++n) { GstInterpolationMode mode; binding = ges_track_element_get_control_binding (element, specs[n]->name); if (!binding) continue; g_object_get (binding, "control_source", &source, NULL); if (!GST_IS_TIMED_VALUE_CONTROL_SOURCE (source)) { GST_FIXME_OBJECT (element, "Implement support for control source type: %s", G_OBJECT_TYPE_NAME (source)); continue; } g_object_get (binding, "absolute", &absolute, NULL); g_object_get (source, "mode", &mode, NULL); new_source = GST_TIMED_VALUE_CONTROL_SOURCE (gst_interpolation_control_source_new ()); g_object_set (new_source, "mode", mode, NULL); if (GST_CLOCK_TIME_IS_VALID (position)) _split_binding (element, new_element, position, source, new_source, absolute); else _copy_binding (element, new_element, position, source, new_source, absolute); /* We only manage direct (absolute) bindings, see TODO in set_control_source */ if (absolute) ges_track_element_set_control_source (new_element, GST_CONTROL_SOURCE (new_source), specs[n]->name, "direct-absolute"); else ges_track_element_set_control_source (new_element, GST_CONTROL_SOURCE (new_source), specs[n]->name, "direct"); } g_free (specs); } /** * ges_track_element_edit: * @object: The #GESTrackElement to edit * @layers: (element-type GESLayer) (nullable): A whitelist of layers * where the edit can be performed, %NULL allows all layers in the * timeline * @mode: The edit mode * @edge: The edge of @object where the edit should occur * @position: The edit position: a new location for the edge of @object * (in nanoseconds) * * Edits the element within its track. * * Returns: %TRUE if the edit of @object completed, %FALSE on failure. * * Deprecated: 1.18: use #ges_timeline_element_edit instead. */ gboolean ges_track_element_edit (GESTrackElement * object, GList * layers, GESEditMode mode, GESEdge edge, guint64 position) { g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE); return ges_timeline_element_edit (GES_TIMELINE_ELEMENT (object), layers, -1, mode, edge, position); } /** * ges_track_element_remove_control_binding: * @object: A #GESTrackElement * @property_name: The name of the child property to remove the control * binding from * * Removes the #GstControlBinding that was created for the specified child * property of the track element using * ges_track_element_set_control_source(). The given @property_name must * be the same name of the child property that was passed to * ges_track_element_set_control_source(). * * Returns: %TRUE if the control binding was removed from the specified * child property of @object, or %FALSE if an error occurred. */ gboolean ges_track_element_remove_control_binding (GESTrackElement * object, const gchar * property_name) { GESTrackElementPrivate *priv; GstControlBinding *binding; GstObject *target; g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE); priv = GES_TRACK_ELEMENT (object)->priv; binding = (GstControlBinding *) g_hash_table_lookup (priv->bindings_hashtable, property_name); if (binding) { g_object_get (binding, "object", &target, NULL); GST_DEBUG_OBJECT (object, "Removing binding %p for property %s", binding, property_name); gst_object_ref (binding); gst_object_remove_control_binding (target, binding); g_signal_emit (object, ges_track_element_signals[CONTROL_BINDING_REMOVED], 0, binding); gst_object_unref (target); gst_object_unref (binding); g_hash_table_remove (priv->bindings_hashtable, property_name); return TRUE; } return FALSE; } /** * ges_track_element_set_control_source: * @object: A #GESTrackElement * @source: The control source to bind the child property to * @property_name: The name of the child property to control * @binding_type: The type of binding to create ("direct" or * "direct-absolute") * * Creates a #GstControlBinding for the specified child property of the * track element using the given control source. The given @property_name * should refer to an existing child property of the track element, as * used in ges_timeline_element_lookup_child(). * * If @binding_type is "direct", then the control binding is created with * gst_direct_control_binding_new() using the given control source. If * @binding_type is "direct-absolute", it is created with * gst_direct_control_binding_new_absolute() instead. * * Returns: %TRUE if the specified child property could be bound to * @source, or %FALSE if an error occurred. */ gboolean ges_track_element_set_control_source (GESTrackElement * object, GstControlSource * source, const gchar * property_name, const gchar * binding_type) { GESTrackElementPrivate *priv; GstElement *element; GParamSpec *pspec; GstControlBinding *binding; gboolean direct, direct_absolute; g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), FALSE); priv = GES_TRACK_ELEMENT (object)->priv; if (G_UNLIKELY (!(GST_IS_CONTROL_SOURCE (source)))) { GST_WARNING ("You need to provide a non-null control source to build a new control binding"); return FALSE; } if (!ges_track_element_lookup_child (object, property_name, &element, &pspec)) { GST_WARNING ("You need to provide a valid and controllable property name"); return FALSE; } /* TODO : update this according to new types of bindings */ direct = !g_strcmp0 (binding_type, "direct"); direct_absolute = !g_strcmp0 (binding_type, "direct-absolute"); if (direct || direct_absolute) { /* First remove existing binding */ if (ges_track_element_remove_control_binding (object, property_name)) { GST_LOG ("Removed old binding for property %s", property_name); } if (direct_absolute) binding = gst_direct_control_binding_new_absolute (GST_OBJECT (element), property_name, source); else binding = gst_direct_control_binding_new (GST_OBJECT (element), property_name, source); gst_object_add_control_binding (GST_OBJECT (element), binding); /* FIXME: maybe we should force the * "ChildTypeName:property-name" * format convention for child property names in bindings_hashtable. * Currently the table may also contain * "property-name" * as keys. */ g_hash_table_insert (priv->bindings_hashtable, g_strdup (property_name), binding); g_signal_emit (object, ges_track_element_signals[CONTROL_BINDING_ADDED], 0, binding); return TRUE; } GST_WARNING ("Binding type must be in [direct]"); return FALSE; } /** * ges_track_element_get_control_binding: * @object: A #GESTrackElement * @property_name: The name of the child property to return the control * binding of * * Gets the control binding that was created for the specified child * property of the track element using * ges_track_element_set_control_source(). The given @property_name must * be the same name of the child property that was passed to * ges_track_element_set_control_source(). * * Returns: (transfer none) (nullable): The control binding that was * created for the specified child property of @object, or %NULL if * @property_name does not correspond to any control binding. */ GstControlBinding * ges_track_element_get_control_binding (GESTrackElement * object, const gchar * property_name) { GESTrackElementPrivate *priv; GstControlBinding *binding; g_return_val_if_fail (GES_IS_TRACK_ELEMENT (object), NULL); priv = GES_TRACK_ELEMENT (object)->priv; binding = (GstControlBinding *) g_hash_table_lookup (priv->bindings_hashtable, property_name); return binding; }