/* GStreamer Editing Services * Copyright (C) 2009 Edward Hervey * 2009 Nokia Corporation * 2012 Thibault Saunier * 2012 Collabora Ltd. * Author: Sebastian Dröge * 2019 Igalia S.L * Author: Thibault Saunier * * 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:gestimeline * @title: GESTimeline * @short_description: Multimedia timeline * * #GESTimeline is the central object for any multimedia timeline. * * A timeline is composed of a set of #GESTrack-s and a set of * #GESLayer-s, which are added to the timeline using * ges_timeline_add_track() and ges_timeline_append_layer(), respectively. * * The contained tracks define the supported types of the timeline * and provide the media output. Essentially, each track provides an * additional source #GstPad. * * Most usage of a timeline will likely only need a single #GESAudioTrack * and/or a single #GESVideoTrack. You can create such a timeline with * ges_timeline_new_audio_video(). After this, you are unlikely to need to * work with the tracks directly. * * A timeline's layers contain #GESClip-s, which in turn control the * creation of #GESTrackElement-s, which are added to the timeline's * tracks. See #GESTimeline::select-tracks-for-object if you wish to have * more control over which track a clip's elements are added to. * * The layers are ordered, with higher priority layers having their * content prioritised in the tracks. This ordering can be changed using * ges_timeline_move_layer(). * * ## Editing * * See #GESTimelineElement for the various ways the elements of a timeline * can be edited. * * If you change the timing or ordering of a timeline's * #GESTimelineElement-s, then these changes will not actually be taken * into account in the output of the timeline's tracks until the * ges_timeline_commit() method is called. This allows you to move its * elements around, say, in response to an end user's mouse dragging, with * little expense before finalising their effect on the produced data. * * ## Overlaps and Auto-Transitions * * There are certain restrictions placed on how #GESSource-s may overlap * in a #GESTrack that belongs to a timeline. These will be enforced by * GES, so the user will not need to keep track of them, but they should * be aware that certain edits will be refused as a result if the overlap * rules would be broken. * * Consider two #GESSource-s, `A` and `B`, with start times `startA` and * `startB`, and end times `endA` and `endB`, respectively. The start * time refers to their #GESTimelineElement:start, and the end time is * their #GESTimelineElement:start + #GESTimelineElement:duration. These * two sources *overlap* if: * * + they share the same #GESTrackElement:track (non %NULL), which belongs * to the timeline; * + they share the same #GES_TIMELINE_ELEMENT_LAYER_PRIORITY; and * + `startA < endB` and `startB < endA `. * * Note that when `startA = endB` or `startB = endA` then the two sources * will *touch* at their edges, but are not considered overlapping. * * If, in addition, `startA < startB < endA`, then we can say that the * end of `A` overlaps the start of `B`. * * If, instead, `startA <= startB` and `endA >= endB`, then we can say * that `A` fully overlaps `B`. * * The overlap rules for a timeline are that: * * 1. One source cannot fully overlap another source. * 2. A source can only overlap the end of up to one other source at its * start. * 3. A source can only overlap the start of up to one other source at its * end. * * The last two rules combined essentially mean that at any given timeline * position, only up to two #GESSource-s may overlap at that position. So * triple or more overlaps are not allowed. * * If you switch on #GESTimeline:auto-transition, then at any moment when * the end of one source (the first source) overlaps the start of another * (the second source), a #GESTransitionClip will be automatically created * for the pair in the same layer and it will cover their overlap. If the * two elements are edited in a way such that the end of the first source * no longer overlaps the start of the second, the transition will be * automatically removed from the timeline. However, if the two sources * still overlap at the same edges after the edit, then the same * transition object will be kept, but with its timing and layer adjusted * accordingly. * * ## Saving * * To save/load a timeline, you can use the ges_timeline_load_from_uri() * and ges_timeline_save_to_uri() methods that use the default format. * * ## Playing * * A timeline is a #GstBin with a source #GstPad for each of its * tracks, which you can fetch with ges_timeline_get_pad_for_track(). You * will likely want to link these to some compatible sink #GstElement-s to * be able to play or capture the content of the timeline. * * You can use a #GESPipeline to easily preview/play the timeline's * content, or render it to a file. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "ges-internal.h" #include "ges-project.h" #include "ges-container.h" #include "ges-timeline.h" #include "ges-timeline-tree.h" #include "ges-track.h" #include "ges-layer.h" #include "ges-auto-transition.h" #include "ges.h" static GPtrArray *select_tracks_for_object_default (GESTimeline * timeline, GESClip * clip, GESTrackElement * tr_obj, gpointer user_data); static void ges_extractable_interface_init (GESExtractableInterface * iface); static void ges_meta_container_interface_init (GESMetaContainerInterface * iface); GST_DEBUG_CATEGORY_STATIC (ges_timeline_debug); #undef GST_CAT_DEFAULT #define GST_CAT_DEFAULT ges_timeline_debug /* lock to protect dynamic callbacks, like pad-added */ #define DYN_LOCK(timeline) (&GES_TIMELINE (timeline)->priv->dyn_mutex) #define LOCK_DYN(timeline) G_STMT_START { \ GST_LOG_OBJECT (timeline, "Getting dynamic lock from %p", \ g_thread_self()); \ g_rec_mutex_lock (DYN_LOCK (timeline)); \ GST_LOG_OBJECT (timeline, "Got Dynamic lock from %p", \ g_thread_self()); \ } G_STMT_END #define UNLOCK_DYN(timeline) G_STMT_START { \ GST_LOG_OBJECT (timeline, "Unlocking dynamic lock from %p", \ g_thread_self()); \ g_rec_mutex_unlock (DYN_LOCK (timeline)); \ GST_LOG_OBJECT (timeline, "Unlocked Dynamic lock from %p", \ g_thread_self()); \ } G_STMT_END #define CHECK_THREAD(timeline) g_assert(timeline->priv->valid_thread == g_thread_self()) struct _GESTimelinePrivate { GNode *tree; /* The duration of the timeline */ gint64 duration; /* The auto-transition of the timeline */ gboolean auto_transition; /* Timeline edition modes and snapping management */ guint64 snapping_distance; GRecMutex dyn_mutex; GList *priv_tracks; /* Avoid sorting layers when we are actually resyncing them ourself */ gboolean resyncing_layers; GList *auto_transitions; /* Last snapping properties */ GstClockTime last_snap_ts; GESTrackElement *last_snaped1; GESTrackElement *last_snaped2; GESTrack *auto_transition_track; GESTrack *new_track; /* While we are creating and adding the TrackElements for a clip, we need to * ignore the child-added signal */ gboolean track_elements_moving; /* whether any error occurred during track selection, including * programming or usage errors */ gboolean has_any_track_selection_error; /* error set for non-programming/usage errors */ GError *track_selection_error; GList *groups; guint stream_start_group_id; GHashTable *all_elements; /* With GST_OBJECT_LOCK */ guint expected_async_done; /* With GST_OBJECT_LOCK */ guint expected_commited; /* For ges_timeline_commit_sync */ GMutex commited_lock; GCond commited_cond; gboolean commit_frozen; gboolean commit_delayed; GThread *valid_thread; gboolean disposed; GstStreamCollection *stream_collection; gboolean rendering_smartly; }; /* private structure to contain our track-related information */ typedef struct { GESTimeline *timeline; GESTrack *track; GstPad *pad; /* Pad from the track */ GstPad *ghostpad; gulong track_element_added_sigid; gulong probe_id; GstStream *stream; } TrackPrivate; enum { PROP_0, PROP_DURATION, PROP_AUTO_TRANSITION, PROP_SNAPPING_DISTANCE, PROP_UPDATE, PROP_LAST }; static GParamSpec *properties[PROP_LAST]; enum { TRACK_ADDED, TRACK_REMOVED, LAYER_ADDED, LAYER_REMOVED, GROUP_ADDED, GROUP_REMOVED, SNAPING_STARTED, SNAPING_ENDED, SELECT_TRACKS_FOR_OBJECT, COMMITED, SELECT_ELEMENT_TRACK, LAST_SIGNAL }; G_DEFINE_TYPE_WITH_CODE (GESTimeline, ges_timeline, GST_TYPE_BIN, G_ADD_PRIVATE (GESTimeline) G_IMPLEMENT_INTERFACE (GES_TYPE_EXTRACTABLE, ges_extractable_interface_init) G_IMPLEMENT_INTERFACE (GES_TYPE_META_CONTAINER, ges_meta_container_interface_init)); static GstBinClass *parent_class; static guint ges_timeline_signals[LAST_SIGNAL] = { 0 }; static gint custom_find_track (TrackPrivate * tr_priv, GESTrack * track); static guint nb_assets = 0; /* GESExtractable implementation */ static gchar * extractable_check_id (GType type, const gchar * id) { gchar *res; if (id == NULL) res = g_strdup_printf ("%s-%i", "project", nb_assets); else res = g_strdup (id); nb_assets++; return res; } static gchar * extractable_get_id (GESExtractable * self) { GESAsset *asset; if (!(asset = ges_extractable_get_asset (self))) return NULL; return g_strdup (ges_asset_get_id (asset)); } static void ges_extractable_interface_init (GESExtractableInterface * iface) { iface->asset_type = GES_TYPE_PROJECT; iface->check_id = (GESExtractableCheckId) extractable_check_id; iface->get_id = extractable_get_id; } static void ges_meta_container_interface_init (GESMetaContainerInterface * iface) { } /* GObject Standard vmethods*/ static void ges_timeline_get_property (GObject * object, guint property_id, GValue * value, GParamSpec * pspec) { GESTimeline *timeline = GES_TIMELINE (object); switch (property_id) { case PROP_DURATION: g_value_set_uint64 (value, timeline->priv->duration); break; case PROP_AUTO_TRANSITION: g_value_set_boolean (value, timeline->priv->auto_transition); break; case PROP_SNAPPING_DISTANCE: g_value_set_uint64 (value, timeline->priv->snapping_distance); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); } } static void ges_timeline_set_property (GObject * object, guint property_id, const GValue * value, GParamSpec * pspec) { GESTimeline *timeline = GES_TIMELINE (object); switch (property_id) { case PROP_AUTO_TRANSITION: ges_timeline_set_auto_transition (timeline, g_value_get_boolean (value)); break; case PROP_SNAPPING_DISTANCE: timeline->priv->snapping_distance = g_value_get_uint64 (value); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); } } gboolean ges_timeline_is_disposed (GESTimeline * timeline) { return timeline->priv->disposed; } static void ges_timeline_dispose (GObject * object) { GESTimeline *tl = GES_TIMELINE (object); GESTimelinePrivate *priv = tl->priv; GList *tmp, *groups; priv->disposed = TRUE; while (tl->layers) { GESLayer *layer = (GESLayer *) tl->layers->data; ges_timeline_remove_layer (GES_TIMELINE (object), layer); } /* FIXME: it should be possible to remove tracks before removing * layers, but at the moment this creates a problem because the track * objects aren't notified that their nleobjects have been destroyed. */ LOCK_DYN (tl); while (tl->tracks) ges_timeline_remove_track (GES_TIMELINE (object), tl->tracks->data); UNLOCK_DYN (tl); /* NOTE: the timeline should not contain empty groups */ groups = g_list_copy_deep (priv->groups, (GCopyFunc) gst_object_ref, NULL); for (tmp = groups; tmp; tmp = tmp->next) { GList *elems = ges_container_ungroup (tmp->data, FALSE); g_list_free_full (elems, gst_object_unref); } g_list_free_full (groups, gst_object_unref); g_list_free_full (priv->groups, gst_object_unref); g_list_free_full (priv->auto_transitions, gst_object_unref); g_hash_table_unref (priv->all_elements); gst_object_unref (priv->stream_collection); gst_clear_object (&priv->auto_transition_track); gst_clear_object (&priv->new_track); g_clear_error (&priv->track_selection_error); priv->track_selection_error = NULL; G_OBJECT_CLASS (ges_timeline_parent_class)->dispose (object); } static void ges_timeline_finalize (GObject * object) { GESTimeline *tl = GES_TIMELINE (object); g_rec_mutex_clear (&tl->priv->dyn_mutex); g_node_destroy (tl->priv->tree); G_OBJECT_CLASS (ges_timeline_parent_class)->finalize (object); } static void ges_timeline_handle_message (GstBin * bin, GstMessage * message) { GESTimeline *timeline = GES_TIMELINE (bin); if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ASYNC_START) { GST_INFO_OBJECT (timeline, "Dropping %" GST_PTR_FORMAT, message); return; } if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ASYNC_DONE) { GST_INFO_OBJECT (timeline, "Dropping %" GST_PTR_FORMAT, message); return; } if (GST_MESSAGE_TYPE (message) == GST_MESSAGE_ELEMENT) { GstMessage *amessage = NULL; const GstStructure *mstructure = gst_message_get_structure (message); if (gst_structure_has_name (mstructure, "NleCompositionStartUpdate")) { if (g_strcmp0 (gst_structure_get_string (mstructure, "reason"), "Seek")) { GST_INFO_OBJECT (timeline, "A composition is starting an update because of %s" " not considering async", gst_structure_get_string (mstructure, "reason")); goto forward; } GST_OBJECT_LOCK (timeline); if (timeline->priv->expected_async_done == 0) { amessage = gst_message_new_async_start (GST_OBJECT_CAST (bin)); LOCK_DYN (timeline); timeline->priv->expected_async_done = g_list_length (timeline->tracks); UNLOCK_DYN (timeline); GST_INFO_OBJECT (timeline, "Posting ASYNC_START %s", gst_structure_get_string (mstructure, "reason")); } GST_OBJECT_UNLOCK (timeline); } else if (gst_structure_has_name (mstructure, "NleCompositionUpdateDone")) { if (g_strcmp0 (gst_structure_get_string (mstructure, "reason"), "Seek")) { GST_INFO_OBJECT (timeline, "A composition is done updating because of %s" " not considering async", gst_structure_get_string (mstructure, "reason")); goto forward; } GST_OBJECT_LOCK (timeline); timeline->priv->expected_async_done -= 1; if (timeline->priv->expected_async_done == 0) { amessage = gst_message_new_async_done (GST_OBJECT_CAST (bin), GST_CLOCK_TIME_NONE); GST_INFO_OBJECT (timeline, "Posting ASYNC_DONE %s", gst_structure_get_string (mstructure, "reason")); } GST_OBJECT_UNLOCK (timeline); } if (amessage) { gst_message_unref (message); gst_element_post_message (GST_ELEMENT_CAST (bin), amessage); return; } } forward: gst_element_post_message (GST_ELEMENT_CAST (bin), message); } static GstStateChangeReturn ges_timeline_change_state (GstElement * element, GstStateChange transition) { GstStateChangeReturn res; GESTimeline *timeline = GES_TIMELINE (element); res = GST_ELEMENT_CLASS (ges_timeline_parent_class)->change_state (element, transition); if (transition == GST_STATE_CHANGE_READY_TO_PAUSED) gst_element_post_message ((GstElement *) timeline, gst_message_new_stream_collection ((GstObject *) timeline, timeline->priv->stream_collection)); return res; } static gboolean ges_timeline_send_event (GstElement * element, GstEvent * event) { GESTimeline *timeline = GES_TIMELINE (element); if (GST_EVENT_TYPE (event) == GST_EVENT_SELECT_STREAMS) { GList *stream_ids = NULL, *tmp, *to_remove = ges_timeline_get_tracks (timeline); gst_event_parse_select_streams (event, &stream_ids); for (tmp = stream_ids; tmp; tmp = tmp->next) { GList *trackit; gchar *stream_id = tmp->data; LOCK_DYN (timeline); for (trackit = timeline->priv->priv_tracks; trackit; trackit = trackit->next) { TrackPrivate *tr_priv = trackit->data; if (!g_strcmp0 (gst_stream_get_stream_id (tr_priv->stream), stream_id)) { to_remove = g_list_remove (to_remove, tr_priv->track); } } UNLOCK_DYN (timeline); } for (tmp = to_remove; tmp; tmp = tmp->next) { GST_INFO_OBJECT (timeline, "Removed unselected track: %" GST_PTR_FORMAT, tmp->data); ges_timeline_remove_track (timeline, tmp->data); } g_list_free_full (stream_ids, g_free); g_list_free (to_remove); return TRUE; } return GST_ELEMENT_CLASS (ges_timeline_parent_class)->send_event (element, event); } /* we collect the first result */ static gboolean _gst_array_accumulator (GSignalInvocationHint * ihint, GValue * return_accu, const GValue * handler_return, gpointer dummy) { gpointer array; array = g_value_get_boxed (handler_return); if (!(ihint->run_type & G_SIGNAL_RUN_CLEANUP)) g_value_set_boxed (return_accu, array); return FALSE; } static void ges_timeline_class_init (GESTimelineClass * klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); GstElementClass *element_class = (GstElementClass *) klass; GstBinClass *bin_class = GST_BIN_CLASS (klass); GST_DEBUG_CATEGORY_INIT (ges_timeline_debug, "gestimeline", GST_DEBUG_FG_YELLOW, "ges timeline"); timeline_tree_init_debug (); parent_class = g_type_class_peek_parent (klass); object_class->get_property = ges_timeline_get_property; object_class->set_property = ges_timeline_set_property; object_class->dispose = ges_timeline_dispose; object_class->finalize = ges_timeline_finalize; element_class->change_state = GST_DEBUG_FUNCPTR (ges_timeline_change_state); element_class->send_event = GST_DEBUG_FUNCPTR (ges_timeline_send_event); bin_class->handle_message = GST_DEBUG_FUNCPTR (ges_timeline_handle_message); /** * GESTimeline:duration: * * The current duration (in nanoseconds) of the timeline. A timeline * 'starts' at time 0, so this is the maximum end time of all of its * #GESTimelineElement-s. */ properties[PROP_DURATION] = g_param_spec_uint64 ("duration", "Duration", "The duration of the timeline", 0, G_MAXUINT64, GST_CLOCK_TIME_NONE, G_PARAM_READABLE); g_object_class_install_property (object_class, PROP_DURATION, properties[PROP_DURATION]); /** * GESTimeline:auto-transition: * * Whether to automatically create a transition whenever two * #GESSource-s overlap in a track of the timeline. See * #GESLayer:auto-transition if you want this to only happen in some * layers. */ g_object_class_install_property (object_class, PROP_AUTO_TRANSITION, g_param_spec_boolean ("auto-transition", "Auto-Transition", "whether the transitions are added", FALSE, G_PARAM_READWRITE)); /** * GESTimeline:snapping-distance: * * The distance (in nanoseconds) at which a #GESTimelineElement being * moved within the timeline should snap one of its #GESSource-s with * another #GESSource-s edge. See #GESEditMode for which edges can * snap during an edit. 0 means no snapping. */ properties[PROP_SNAPPING_DISTANCE] = g_param_spec_uint64 ("snapping-distance", "Snapping distance", "Distance from which moving an object will snap with neighbours", 0, G_MAXUINT64, 0, G_PARAM_READWRITE); g_object_class_install_property (object_class, PROP_SNAPPING_DISTANCE, properties[PROP_SNAPPING_DISTANCE]); /** * GESTimeline::track-added: * @timeline: The #GESTimeline * @track: The track that was added to @timeline * * Will be emitted after the track is added to the timeline. * * Note that this should not be emitted whilst a timeline is being * loaded from its #GESProject asset. You should connect to the * project's #GESProject::loaded signal if you want to know which * tracks were created for the timeline. */ ges_timeline_signals[TRACK_ADDED] = g_signal_new ("track-added", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, track_added), NULL, NULL, NULL, G_TYPE_NONE, 1, GES_TYPE_TRACK); /** * GESTimeline::track-removed: * @timeline: The #GESTimeline * @track: The track that was removed from @timeline * * Will be emitted after the track is removed from the timeline. */ ges_timeline_signals[TRACK_REMOVED] = g_signal_new ("track-removed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, track_removed), NULL, NULL, NULL, G_TYPE_NONE, 1, GES_TYPE_TRACK); /** * GESTimeline::layer-added: * @timeline: The #GESTimeline * @layer: The layer that was added to @timeline * * Will be emitted after the layer is added to the timeline. * * Note that this should not be emitted whilst a timeline is being * loaded from its #GESProject asset. You should connect to the * project's #GESProject::loaded signal if you want to know which * layers were created for the timeline. */ ges_timeline_signals[LAYER_ADDED] = g_signal_new ("layer-added", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, layer_added), NULL, NULL, NULL, G_TYPE_NONE, 1, GES_TYPE_LAYER); /** * GESTimeline::layer-removed: * @timeline: The #GESTimeline * @layer: The layer that was removed from @timeline * * Will be emitted after the layer is removed from the timeline. */ ges_timeline_signals[LAYER_REMOVED] = g_signal_new ("layer-removed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, layer_removed), NULL, NULL, NULL, G_TYPE_NONE, 1, GES_TYPE_LAYER); /** * GESTimeline::group-added * @timeline: The #GESTimeline * @group: The group that was added to @timeline * * Will be emitted after the group is added to to the timeline. This can * happen when grouping with `ges_container_group`, or by adding * containers to a newly created group. * * Note that this should not be emitted whilst a timeline is being * loaded from its #GESProject asset. You should connect to the * project's #GESProject::loaded signal if you want to know which groups * were created for the timeline. */ ges_timeline_signals[GROUP_ADDED] = g_signal_new ("group-added", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, group_added), NULL, NULL, NULL, G_TYPE_NONE, 1, GES_TYPE_GROUP); /** * GESTimeline::group-removed * @timeline: The #GESTimeline * @group: The group that was removed from @timeline * @children: (element-type GESContainer) (transfer none): A list * of #GESContainer-s that _were_ the children of the removed @group * * Will be emitted after the group is removed from the timeline through * `ges_container_ungroup`. Note that @group will no longer contain its * former children, these are held in @children. * * Note that if a group is emptied, then it will no longer belong to the * timeline, but this signal will **not** be emitted in such a case. */ ges_timeline_signals[GROUP_REMOVED] = g_signal_new ("group-removed", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GESTimelineClass, group_removed), NULL, NULL, NULL, G_TYPE_NONE, 2, GES_TYPE_GROUP, G_TYPE_PTR_ARRAY); /** * GESTimeline::snapping-started: * @timeline: The #GESTimeline * @obj1: The first element that is snapping * @obj2: The second element that is snapping * @position: The position where the two objects will snap to * * Will be emitted whenever an element's movement invokes a snapping * event during an edit (usually of one of its ancestors) because its * start or end point lies within the #GESTimeline:snapping-distance of * another element's start or end point. * * See #GESEditMode to see what can snap during an edit. * * Note that only up to one snapping-started signal will be emitted per * element edit within a timeline. */ ges_timeline_signals[SNAPING_STARTED] = g_signal_new ("snapping-started", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 3, GES_TYPE_TRACK_ELEMENT, GES_TYPE_TRACK_ELEMENT, G_TYPE_UINT64); /** * GESTimeline::snapping-ended: * @timeline: The #GESTimeline * @obj1: The first element that was snapping * @obj2: The second element that was snapping * @position: The position where the two objects were to be snapped to * * Will be emitted whenever a snapping event ends. After a snap event * has started (see #GESTimeline::snapping-started), it can later end * because either another timeline edit has occurred (which may or may * not have created a new snapping event), or because the timeline has * been committed. */ ges_timeline_signals[SNAPING_ENDED] = g_signal_new ("snapping-ended", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 3, GES_TYPE_TRACK_ELEMENT, GES_TYPE_TRACK_ELEMENT, G_TYPE_UINT64); /** * GESTimeline::select-tracks-for-object: * @timeline: The #GESTimeline * @clip: The clip that @track_element is being added to * @track_element: The element being added * * This will be emitted whenever the timeline needs to determine which * tracks a clip's children should be added to. The track element will * be added to each of the tracks given in the return. If a track * element is selected to go into multiple tracks, it will be copied * into the additional tracks, under the same clip. Note that the copy * will *not* keep its properties or state in sync with the original. * * Connect to this signal once if you wish to control which element * should be added to which track. Doing so will overwrite the default * behaviour, which adds @track_element to all tracks whose * #GESTrack:track-type includes the @track_element's * #GESTrackElement:track-type. * * Note that under the default track selection, if a clip would produce * multiple core children of the same #GESTrackType, it will choose * one of the core children arbitrarily to place in the corresponding * tracks, with a warning for the other core children that are not * placed in the track. For example, this would happen for a #GESUriClip * that points to a file that contains multiple audio streams. If you * wish to choose the stream, you could connect to this signal, and use, * say, ges_uri_source_asset_get_stream_info() to choose which core * source to add. * * When a clip is first added to a timeline, its core elements will * be created for the current tracks in the timeline if they have not * already been created. Then this will be emitted for each of these * core children to select which tracks, if any, they should be added * to. It will then be called for any non-core children in the clip. * * In addition, if a new track element is ever added to a clip in a * timeline (and it is not already part of a track) this will be emitted * to select which tracks the element should be added to. * * Finally, as a special case, if a track is added to the timeline * *after* it already contains clips, then it will request the creation * of the clips' core elements of the corresponding type, if they have * not already been created, and this signal will be emitted for each of * these newly created elements. In addition, this will also be released * for all other track elements in the timeline's clips that have not * yet been assigned a track. However, in this final case, the timeline * will only check whether the newly added track appears in the track * list. If it does appear, the track element will be added to the newly * added track. All other tracks in the returned track list are ignored. * * In this latter case, track elements that are already part of a track * will not be asked if they want to be copied into the new track. If * you wish to do this, you can use ges_clip_add_child_to_track(). * * Note that the returned #GPtrArray should own a new reference to each * of its contained #GESTrack. The timeline will set the #GDestroyNotify * free function on the #GPtrArray to dereference the elements. * * Returns: (transfer full) (element-type GESTrack): An array of * #GESTrack-s that @track_element should be added to, or %NULL to * not add the element to any track. */ ges_timeline_signals[SELECT_TRACKS_FOR_OBJECT] = g_signal_new ("select-tracks-for-object", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0, _gst_array_accumulator, NULL, NULL, G_TYPE_PTR_ARRAY, 2, GES_TYPE_CLIP, GES_TYPE_TRACK_ELEMENT); /** * GESTimeline::select-element-track: * @timeline: The #GESTimeline * @clip: The clip that @track_element is being added to * @track_element: The element being added * * Simplified version of #GESTimeline::select-tracks-for-object which only * allows @track_element to be added to a single #GESTrack. * * Returns: (transfer full) (nullable): A track to put @track_element into, or %NULL if * it should be discarded. * * Since: 1.18 */ ges_timeline_signals[SELECT_ELEMENT_TRACK] = g_signal_new ("select-element-track", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, GES_TYPE_TRACK, 2, GES_TYPE_CLIP, GES_TYPE_TRACK_ELEMENT); /** * GESTimeline::commited: * @timeline: The #GESTimeline * * This signal will be emitted once the changes initiated by * ges_timeline_commit() have been executed in the backend. Use * ges_timeline_commit_sync() if you do not want to have to connect * to this signal. */ ges_timeline_signals[COMMITED] = g_signal_new ("commited", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 0); } static void ges_timeline_init (GESTimeline * self) { GESTimelinePrivate *priv = self->priv; self->priv = ges_timeline_get_instance_private (self); self->priv->tree = g_node_new (self); priv = self->priv; self->layers = NULL; self->tracks = NULL; self->priv->duration = 0; self->priv->auto_transition = FALSE; priv->snapping_distance = 0; priv->expected_async_done = 0; priv->expected_commited = 0; self->priv->last_snap_ts = GST_CLOCK_TIME_NONE; priv->priv_tracks = NULL; priv->all_elements = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, gst_object_unref); priv->stream_start_group_id = -1; priv->stream_collection = gst_stream_collection_new (NULL); g_signal_connect_after (self, "select-tracks-for-object", G_CALLBACK (select_tracks_for_object_default), NULL); g_rec_mutex_init (&priv->dyn_mutex); g_mutex_init (&priv->commited_lock); priv->valid_thread = g_thread_self (); } /* Private methods */ /* Sorting utils*/ static gint sort_layers (gpointer a, gpointer b) { GESLayer *layer_a, *layer_b; guint prio_a, prio_b; layer_a = GES_LAYER (a); layer_b = GES_LAYER (b); prio_a = ges_layer_get_priority (layer_a); prio_b = ges_layer_get_priority (layer_b); if (prio_a > prio_b) return 1; if (prio_a < prio_b) return -1; return 0; } static void _resync_layers (GESTimeline * timeline) { GList *tmp; gint i = 0; timeline->priv->resyncing_layers = TRUE; for (tmp = timeline->layers; tmp; tmp = tmp->next) { layer_set_priority (tmp->data, i, TRUE); i++; } timeline->priv->resyncing_layers = FALSE; } void timeline_update_duration (GESTimeline * timeline) { GstClockTime duration = timeline_tree_get_duration (timeline->priv->tree); if (timeline->priv->duration != duration) { GST_DEBUG ("track duration : %" GST_TIME_FORMAT " current : %" GST_TIME_FORMAT, GST_TIME_ARGS (duration), GST_TIME_ARGS (timeline->priv->duration)); timeline->priv->duration = duration; g_object_notify_by_pspec (G_OBJECT (timeline), properties[PROP_DURATION]); } } static gint custom_find_track (TrackPrivate * tr_priv, GESTrack * track) { if (tr_priv->track == track) return 0; return -1; } static void _destroy_auto_transition_cb (GESAutoTransition * auto_transition, GESTimeline * timeline) { GESTimelinePrivate *priv = timeline->priv; GESClip *transition = auto_transition->transition_clip; GESLayer *layer = ges_clip_get_layer (transition); ges_layer_remove_clip (layer, transition); g_signal_handlers_disconnect_by_func (auto_transition, _destroy_auto_transition_cb, timeline); priv->auto_transitions = g_list_remove (priv->auto_transitions, auto_transition); gst_object_unref (auto_transition); } GESAutoTransition * ges_timeline_create_transition (GESTimeline * timeline, GESTrackElement * previous, GESTrackElement * next, GESClip * transition, GESLayer * layer, guint64 start, guint64 duration) { GESAutoTransition *auto_transition; GESTrackElement *child; /* track should not be NULL */ GESTrack *track = ges_track_element_get_track (next); if (transition == NULL) { GESAsset *asset; LOCK_DYN (timeline); timeline->priv->auto_transition_track = gst_object_ref (track); UNLOCK_DYN (timeline); asset = ges_asset_request (GES_TYPE_TRANSITION_CLIP, "crossfade", NULL); transition = ges_layer_add_asset (layer, asset, start, 0, duration, ges_track_element_get_track_type (next)); gst_object_unref (asset); LOCK_DYN (timeline); /* should have been set to NULL, but clear just in case */ gst_clear_object (&timeline->priv->auto_transition_track); UNLOCK_DYN (timeline); } else { GST_DEBUG_OBJECT (timeline, "Reusing already existing transition: %" GST_PTR_FORMAT, transition); } g_return_val_if_fail (transition, NULL); g_return_val_if_fail (g_list_length (GES_CONTAINER_CHILDREN (transition)) == 1, NULL); child = GES_CONTAINER_CHILDREN (transition)->data; if (ges_track_element_get_track (child) != track) { GST_ERROR_OBJECT (timeline, "The auto transition element %" GES_FORMAT " for elements %" GES_FORMAT " and %" GES_FORMAT " is not in the same track %" GST_PTR_FORMAT, GES_ARGS (child), GES_ARGS (previous), GES_ARGS (next), track); return NULL; } /* We know there is only 1 TrackElement */ auto_transition = ges_auto_transition_new (child, previous, next); g_signal_connect (auto_transition, "destroy-me", G_CALLBACK (_destroy_auto_transition_cb), timeline); timeline->priv->auto_transitions = g_list_prepend (timeline->priv->auto_transitions, auto_transition); return auto_transition; } GESAutoTransition * ges_timeline_find_auto_transition (GESTimeline * timeline, GESTrackElement * prev, GESTrackElement * next, GstClockTime transition_duration) { GList *tmp; for (tmp = timeline->priv->auto_transitions; tmp; tmp = tmp->next) { GESAutoTransition *auto_trans = (GESAutoTransition *) tmp->data; /* We already have a transition linked to one of the elements we want to * find a transition for */ if (auto_trans->previous_source == prev || auto_trans->next_source == next) { if (auto_trans->previous_source != prev || auto_trans->next_source != next) { GST_ERROR_OBJECT (timeline, "Failed creating auto transition, " " trying to have 3 clips overlapping, rolling back"); } return auto_trans; } } return NULL; } GESAutoTransition * ges_timeline_get_auto_transition_at_edge (GESTimeline * timeline, GESTrackElement * source, GESEdge edge) { GList *tmp, *auto_transitions; GESAutoTransition *ret = NULL; LOCK_DYN (timeline); auto_transitions = g_list_copy_deep (timeline->priv->auto_transitions, (GCopyFunc) gst_object_ref, NULL); UNLOCK_DYN (timeline); for (tmp = auto_transitions; tmp; tmp = tmp->next) { GESAutoTransition *auto_trans = (GESAutoTransition *) tmp->data; /* We already have a transition linked to one of the elements we want to * find a transition for */ if (edge == GES_EDGE_END && auto_trans->previous_source == source) { ret = gst_object_ref (auto_trans); break; } else if (edge == GES_EDGE_START && auto_trans->next_source == source) { ret = gst_object_ref (auto_trans); break; } } g_list_free_full (auto_transitions, gst_object_unref); return ret; } static GESAutoTransition * _create_auto_transition_from_transitions (GESTimeline * timeline, GESTrackElement * prev, GESTrackElement * next, GstClockTime transition_duration) { GList *tmp, *elements; GESLayer *layer; guint32 layer_prio = GES_TIMELINE_ELEMENT_LAYER_PRIORITY (prev); GESTrack *track; GESAutoTransition *auto_transition = ges_timeline_find_auto_transition (timeline, prev, next, transition_duration); if (auto_transition) return auto_transition; layer = ges_timeline_get_layer (timeline, layer_prio); track = ges_track_element_get_track (prev); elements = ges_track_get_elements (track); for (tmp = elements; tmp; tmp = tmp->next) { GESTrackElement *maybe_transition = tmp->data; if (ges_timeline_element_get_layer_priority (tmp->data) != layer_prio) continue; if (_START (maybe_transition) > _START (next)) break; else if (_START (maybe_transition) != _START (next) || _DURATION (maybe_transition) != transition_duration) continue; else if (GES_IS_TRANSITION (maybe_transition)) { /* Use that transition */ /* TODO We should make sure that the transition contains only * TrackElement-s in @track and if it is not the case properly unlink the * object to use it */ auto_transition = ges_timeline_create_transition (timeline, prev, next, GES_CLIP (GES_TIMELINE_ELEMENT_PARENT (maybe_transition)), layer, _START (next), transition_duration); break; } } gst_object_unref (layer); g_list_free_full (elements, gst_object_unref); return auto_transition; } void ges_timeline_emit_snapping (GESTimeline * timeline, GESTrackElement * elem1, GESTrackElement * elem2, GstClockTime snap_time) { GESTimelinePrivate *priv = timeline->priv; GstClockTime last_snap_ts = timeline->priv->last_snap_ts; if (!GST_CLOCK_TIME_IS_VALID (snap_time)) { if (priv->last_snaped1 != NULL && priv->last_snaped2 != NULL) { g_signal_emit (timeline, ges_timeline_signals[SNAPING_ENDED], 0, priv->last_snaped1, priv->last_snaped2, last_snap_ts); priv->last_snaped1 = NULL; priv->last_snaped2 = NULL; priv->last_snap_ts = GST_CLOCK_TIME_NONE; } return; } g_assert (elem1 != elem2); if (GST_CLOCK_TIME_IS_VALID (last_snap_ts)) g_signal_emit (timeline, ges_timeline_signals[SNAPING_ENDED], 0, priv->last_snaped1, priv->last_snaped2, (last_snap_ts)); priv->last_snaped1 = elem1; priv->last_snaped2 = elem2; timeline->priv->last_snap_ts = snap_time; g_signal_emit (timeline, ges_timeline_signals[SNAPING_STARTED], 0, elem1, elem2, snap_time); } /* Accept @self == NULL, making it use default framerate */ void timeline_get_framerate (GESTimeline * self, gint * fps_n, gint * fps_d) { GList *tmp; *fps_n = *fps_d = -1; if (!self) goto done; LOCK_DYN (self); for (tmp = self->tracks; tmp; tmp = tmp->next) { if (GES_IS_VIDEO_TRACK (tmp->data)) { GstCaps *restriction = ges_track_get_restriction_caps (tmp->data); gint i; if (!restriction) continue; for (i = 0; i < gst_caps_get_size (restriction); i++) { gint n, d; if (!gst_structure_get_fraction (gst_caps_get_structure (restriction, i), "framerate", &n, &d)) continue; if (*fps_n != -1 && *fps_d != -1 && !(n == *fps_n && d == *fps_d)) { GST_WARNING_OBJECT (self, "Various framerates specified, this is not supported" " First one will be used."); continue; } *fps_n = n; *fps_d = d; } gst_caps_unref (restriction); } } UNLOCK_DYN (self); done: if (*fps_n == -1 && *fps_d == -1) { GST_INFO_OBJECT (self, "No framerate found, using default " G_STRINGIFY (FRAMERATE_N) "/ " G_STRINGIFY (FRAMERATE_D)); *fps_n = DEFAULT_FRAMERATE_N; *fps_d = DEFAULT_FRAMERATE_D; } } void ges_timeline_freeze_auto_transitions (GESTimeline * timeline, gboolean freeze) { GList *tmp, *trans = g_list_copy (timeline->priv->auto_transitions); for (tmp = trans; tmp; tmp = tmp->next) { GESAutoTransition *auto_transition = tmp->data; auto_transition->frozen = freeze; if (freeze == FALSE) { GST_LOG_OBJECT (timeline, "Un-Freezing %" GES_FORMAT, GES_ARGS (auto_transition->transition_clip)); ges_auto_transition_update (auto_transition); } else { GST_LOG_OBJECT (timeline, "Freezing %" GES_FORMAT, GES_ARGS (auto_transition->transition_clip)); } } g_list_free (trans); } static gint _edit_auto_transition (GESTimeline * timeline, GESTimelineElement * element, gint64 new_layer_priority, GESEditMode mode, GESEdge edge, GstClockTime position, GError ** error) { GList *tmp; guint32 layer_prio = ges_timeline_element_get_layer_priority (element); GESLayer *layer = ges_timeline_get_layer (timeline, layer_prio); if (!ges_layer_get_auto_transition (layer)) { gst_object_unref (layer); return -1; } gst_object_unref (layer); for (tmp = timeline->priv->auto_transitions; tmp; tmp = tmp->next) { GESTimelineElement *replace; GESAutoTransition *auto_transition = tmp->data; if (GES_TIMELINE_ELEMENT (auto_transition->transition) == element || GES_TIMELINE_ELEMENT (auto_transition->transition_clip) == element) { if (auto_transition->positioning) { GST_ERROR_OBJECT (element, "Trying to edit an auto-transition " "whilst it is being positioned"); return FALSE; } if (new_layer_priority != layer_prio) { GST_WARNING_OBJECT (element, "Cannot edit an auto-transition to a " "new layer"); return FALSE; } if (mode != GES_EDIT_MODE_TRIM) { GST_WARNING_OBJECT (element, "Cannot edit an auto-transition " "under the edit mode %i", mode); return FALSE; } if (edge == GES_EDGE_END) replace = GES_TIMELINE_ELEMENT (auto_transition->previous_source); else replace = GES_TIMELINE_ELEMENT (auto_transition->next_source); GST_INFO_OBJECT (element, "Trimming %" GES_FORMAT " in place of " "trimming the corresponding auto-transition", GES_ARGS (replace)); return ges_timeline_element_edit_full (replace, -1, mode, edge, position, error); } } return -1; } gboolean ges_timeline_edit (GESTimeline * timeline, GESTimelineElement * element, gint64 new_layer_priority, GESEditMode mode, GESEdge edge, guint64 position, GError ** error) { GstClockTimeDiff edge_diff = (edge == GES_EDGE_END ? GST_CLOCK_DIFF (position, element->start + element->duration) : GST_CLOCK_DIFF (position, element->start)); gint64 prio_diff = (gint64) ges_timeline_element_get_layer_priority (element) - new_layer_priority; gint res = -1; if ((GES_IS_TRANSITION (element) || GES_IS_TRANSITION_CLIP (element))) res = _edit_auto_transition (timeline, element, new_layer_priority, mode, edge, position, error); if (res != -1) return res; switch (mode) { case GES_EDIT_MODE_RIPPLE: return timeline_tree_ripple (timeline->priv->tree, element, prio_diff, edge_diff, edge, timeline->priv->snapping_distance, error); case GES_EDIT_MODE_TRIM: return timeline_tree_trim (timeline->priv->tree, element, prio_diff, edge_diff, edge, timeline->priv->snapping_distance, error); case GES_EDIT_MODE_NORMAL: return timeline_tree_move (timeline->priv->tree, element, prio_diff, edge_diff, edge, timeline->priv->snapping_distance, error); case GES_EDIT_MODE_ROLL: if (prio_diff != 0) { GST_WARNING_OBJECT (element, "Cannot roll an element to a new layer"); return FALSE; } return timeline_tree_roll (timeline->priv->tree, element, edge_diff, edge, timeline->priv->snapping_distance, error); case GES_EDIT_MODE_SLIDE: GST_ERROR_OBJECT (element, "Sliding not implemented."); return FALSE; } return FALSE; } void timeline_add_group (GESTimeline * timeline, GESGroup * group) { GST_DEBUG_OBJECT (timeline, "Adding group %" GST_PTR_FORMAT, group); timeline->priv->groups = g_list_prepend (timeline->priv->groups, gst_object_ref_sink (group)); ges_timeline_element_set_timeline (GES_TIMELINE_ELEMENT (group), timeline); } /** * timeline_emit_group_added: * @timeline: The #GESTimeline * @group: group that was added * * Emit group-added signal. */ void timeline_emit_group_added (GESTimeline * timeline, GESGroup * group) { g_signal_emit (timeline, ges_timeline_signals[GROUP_ADDED], 0, group); } /** * timeline_emit_group_removed: * @timeline: The #GESTimeline * @group: group that was removed * * Emit group-removed signal. */ void timeline_emit_group_removed (GESTimeline * timeline, GESGroup * group, GPtrArray * array) { g_signal_emit (timeline, ges_timeline_signals[GROUP_REMOVED], 0, group, array); } void timeline_remove_group (GESTimeline * timeline, GESGroup * group) { GST_DEBUG_OBJECT (timeline, "Removing group %" GST_PTR_FORMAT, group); timeline->priv->groups = g_list_remove (timeline->priv->groups, group); ges_timeline_element_set_timeline (GES_TIMELINE_ELEMENT (group), NULL); gst_object_unref (group); } static GESTrackElement * _core_in_track (GESTrack * track, GESClip * clip) { GList *tmp; for (tmp = GES_CONTAINER_CHILDREN (clip); tmp; tmp = tmp->next) { GESTrackElement *el = tmp->data; if (ges_track_element_is_core (el) && ges_track_element_get_track (el) == track) { return tmp->data; } } return NULL; } static GPtrArray * select_tracks_for_object_default (GESTimeline * timeline, GESClip * clip, GESTrackElement * tr_object, gpointer user_data) { GPtrArray *result; GList *tmp; GESTrackElement *core; result = g_ptr_array_new (); LOCK_DYN (timeline); for (tmp = timeline->tracks; tmp; tmp = tmp->next) { GESTrack *track = GES_TRACK (tmp->data); if ((track->type & ges_track_element_get_track_type (tr_object))) { if (ges_track_element_is_core (tr_object)) { core = _core_in_track (track, clip); if (core) { GST_WARNING_OBJECT (timeline, "The clip '%s' contains multiple " "core elements of the same %s track type. The core child " "'%s' has already been chosen arbitrarily for the track %" GST_PTR_FORMAT ", which means that the other core child " "'%s' of the same type can not be added to the track. " "Consider connecting to " "GESTimeline::select-tracks-for-objects to be able to " "specify which core element should land in the track", GES_TIMELINE_ELEMENT_NAME (clip), ges_track_type_name (track->type), GES_TIMELINE_ELEMENT_NAME (core), track, GES_TIMELINE_ELEMENT_NAME (tr_object)); continue; } } gst_object_ref (track); g_ptr_array_add (result, track); } } UNLOCK_DYN (timeline); return result; } static GPtrArray * _get_selected_tracks (GESTimeline * timeline, GESClip * clip, GESTrackElement * track_element) { guint i, j; GPtrArray *tracks = NULL; GESTrack *track = NULL; g_signal_emit (G_OBJECT (timeline), ges_timeline_signals[SELECT_ELEMENT_TRACK], 0, clip, track_element, &track); if (track) { tracks = g_ptr_array_new (); g_ptr_array_add (tracks, track); } else { g_signal_emit (G_OBJECT (timeline), ges_timeline_signals[SELECT_TRACKS_FOR_OBJECT], 0, clip, track_element, &tracks); } if (tracks == NULL) tracks = g_ptr_array_new (); g_ptr_array_set_free_func (tracks, gst_object_unref); /* make sure unique */ for (i = 0; i < tracks->len;) { GESTrack *track = GES_TRACK (g_ptr_array_index (tracks, i)); for (j = i + 1; j < tracks->len;) { if (track == g_ptr_array_index (tracks, j)) { GST_WARNING_OBJECT (timeline, "Found the track %" GST_PTR_FORMAT " more than once in the return for select-tracks-for-object " "signal for track element %" GES_FORMAT " in clip %" GES_FORMAT ". Ignoring the extra track", track, GES_ARGS (track_element), GES_ARGS (clip)); g_ptr_array_remove_index (tracks, j); /* don't increase index since the next track is in its place */ continue; } j++; } if (ges_track_get_timeline (track) != timeline) { GST_WARNING_OBJECT (timeline, "The track %" GST_PTR_FORMAT " found in the return for select-tracks-for-object belongs " "to a different timeline %" GST_PTR_FORMAT ". Ignoring this " "track", track, ges_track_get_timeline (track)); g_ptr_array_remove_index (tracks, i); /* don't increase index since the next track is in its place */ continue; } i++; } return tracks; } /* returns TRUE if track element was successfully added to all the * selected tracks */ static gboolean _add_track_element_to_tracks (GESTimeline * timeline, GESClip * clip, GESTrackElement * track_element, GError ** error) { guint i; gboolean ret = TRUE; GPtrArray *tracks = _get_selected_tracks (timeline, clip, track_element); for (i = 0; i < tracks->len; i++) { GESTrack *track = GES_TRACK (g_ptr_array_index (tracks, i)); if (!ges_clip_add_child_to_track (clip, track_element, track, error)) { ret = FALSE; if (error) break; } } g_ptr_array_unref (tracks); return ret; } static gboolean _try_add_track_element_to_track (GESTimeline * timeline, GESClip * clip, GESTrackElement * track_element, GESTrack * track, GError ** error) { gboolean no_error = TRUE; GPtrArray *tracks = _get_selected_tracks (timeline, clip, track_element); /* if we are trying to add the element to a newly added track, then * we only check whether the track list contains the newly added track, * if it does we add the track element to the track, or add a copy if * the track element is already in a track */ if (g_ptr_array_find (tracks, track, NULL)) { if (!ges_clip_add_child_to_track (clip, track_element, track, error)) no_error = FALSE; } g_ptr_array_unref (tracks); return no_error; } /* accepts NULL */ void ges_timeline_set_moving_track_elements (GESTimeline * timeline, gboolean moving) { if (timeline) { LOCK_DYN (timeline); timeline->priv->track_elements_moving = moving; UNLOCK_DYN (timeline); } } void ges_timeline_set_track_selection_error (GESTimeline * timeline, gboolean was_error, GError * error) { GESTimelinePrivate *priv; LOCK_DYN (timeline); priv = timeline->priv; g_clear_error (&priv->track_selection_error); priv->track_selection_error = error; priv->has_any_track_selection_error = was_error; UNLOCK_DYN (timeline); } gboolean ges_timeline_take_track_selection_error (GESTimeline * timeline, GError ** error) { gboolean ret; GESTimelinePrivate *priv; LOCK_DYN (timeline); priv = timeline->priv; if (error) { if (*error) { GST_ERROR_OBJECT (timeline, "Error not handled %s", (*error)->message); g_error_free (*error); } *error = priv->track_selection_error; } else if (priv->track_selection_error) { GST_WARNING_OBJECT (timeline, "Got track selection error: %s", priv->track_selection_error->message); g_error_free (priv->track_selection_error); } priv->track_selection_error = NULL; ret = priv->has_any_track_selection_error; priv->has_any_track_selection_error = FALSE; UNLOCK_DYN (timeline); return ret; } static void clip_track_element_added_cb (GESClip * clip, GESTrackElement * track_element, GESTimeline * timeline) { GESTrack *auto_trans_track, *new_track; GError *error = NULL; gboolean success = FALSE; if (timeline->priv->track_elements_moving) { GST_DEBUG_OBJECT (timeline, "Ignoring element added: %" GES_FORMAT " in %" GES_FORMAT, GES_ARGS (track_element), GES_ARGS (clip)); return; } if (ges_track_element_get_track (track_element) != NULL) { GST_DEBUG_OBJECT (timeline, "Not selecting tracks for %" GES_FORMAT " in %" GES_FORMAT " because it already part of the track %" GST_PTR_FORMAT, GES_ARGS (track_element), GES_ARGS (clip), ges_track_element_get_track (track_element)); return; } LOCK_DYN (timeline); /* take ownership of auto_transition_track. For auto-transitions, this * should be used exactly once! */ auto_trans_track = timeline->priv->auto_transition_track; timeline->priv->auto_transition_track = NULL; /* don't take ownership of new_track */ new_track = timeline->priv->new_track; UNLOCK_DYN (timeline); if (auto_trans_track) { /* don't use track-selection */ success = ! !ges_clip_add_child_to_track (clip, track_element, auto_trans_track, &error); gst_object_unref (auto_trans_track); } else { if (new_track) success = _try_add_track_element_to_track (timeline, clip, track_element, new_track, &error); else success = _add_track_element_to_tracks (timeline, clip, track_element, &error); } if (error || !success) { if (!error) GST_WARNING_OBJECT (timeline, "Track selection failed for %" GES_FORMAT, GES_ARGS (track_element)); ges_timeline_set_track_selection_error (timeline, TRUE, error); } } static void clip_track_element_removed_cb (GESClip * clip, GESTrackElement * track_element, GESTimeline * timeline) { GESTrack *track = ges_track_element_get_track (track_element); if (timeline->priv->track_elements_moving) { GST_DEBUG_OBJECT (timeline, "Ignoring element removed (%" GST_PTR_FORMAT " in %" GST_PTR_FORMAT, track_element, clip); return; } if (track) { /* if we have non-core elements in the same track, they should be * removed from them to preserve the rule that a non-core can only be * in the same track as a core element from the same clip */ if (ges_track_element_is_core (track_element)) ges_clip_empty_from_track (clip, track); ges_track_remove_element (track, track_element); } } static void track_element_added_cb (GESTrack * track, GESTrackElement * element, GESTimeline * timeline) { if (GES_IS_SOURCE (element)) timeline_tree_create_transitions_for_track_element (timeline->priv->tree, element, ges_timeline_find_auto_transition); } /* returns TRUE if no errors in adding to tracks */ static gboolean _add_clip_children_to_tracks (GESTimeline * timeline, GESClip * clip, gboolean add_core, GESTrack * new_track, GList * blacklist, GError ** error) { GList *tmp, *children; gboolean no_errors = TRUE; /* list of children may change if some are copied into tracks */ children = ges_container_get_children (GES_CONTAINER (clip), FALSE); for (tmp = children; tmp; tmp = tmp->next) { GESTrackElement *el = tmp->data; if (ges_track_element_is_core (el) != add_core) continue; if (g_list_find (blacklist, el)) continue; if (ges_track_element_get_track (el) == NULL) { gboolean res; if (new_track) res = _try_add_track_element_to_track (timeline, clip, el, new_track, error); else res = _add_track_element_to_tracks (timeline, clip, el, error); if (!res) { no_errors = FALSE; if (error) goto done; } } } done: g_list_free_full (children, gst_object_unref); return no_errors; } /* returns TRUE if no errors in adding to tracks */ static gboolean add_object_to_tracks (GESTimeline * timeline, GESClip * clip, GESTrack * new_track, GError ** error) { GList *tracks, *tmp, *list, *created, *just_added = NULL; gboolean no_errors = TRUE; GST_DEBUG_OBJECT (timeline, "Creating %" GST_PTR_FORMAT " trackelements and adding them to our tracks", clip); LOCK_DYN (timeline); tracks = g_list_copy_deep (timeline->tracks, (GCopyFunc) gst_object_ref, NULL); timeline->priv->new_track = new_track ? gst_object_ref (new_track) : NULL; UNLOCK_DYN (timeline); /* create core elements */ for (tmp = tracks; tmp; tmp = tmp->next) { GESTrack *track = GES_TRACK (tmp->data); if (new_track && track != new_track) continue; list = ges_clip_create_track_elements (clip, track->type); /* just_added only used for pointer comparison, so safe to include * elements that may be destroyed because they fail to be added to * the clip */ just_added = g_list_concat (just_added, list); for (created = list; created; created = created->next) { GESTimelineElement *el = created->data; gst_object_ref (el); /* make track selection be handled by clip_track_element_added_cb * This is needed for backward-compatibility: when adding a clip to * a layer, the track is set for the core elements of the clip * during the child-added signal emission, just before the user's * own connection. * NOTE: for the children that have not just been created, they * are already part of the clip and so child-added will not be * released. And when a child is selected for multiple tracks, their * copy will be added to the clip before the track is selected, so * the track will not be set in the child-added signal */ ges_timeline_set_track_selection_error (timeline, FALSE, NULL); ges_clip_set_add_error (clip, NULL); if (!ges_container_add (GES_CONTAINER (clip), el)) { no_errors = FALSE; if (!error) GST_ERROR_OBJECT (clip, "Could not add the core element %s " "to the clip", el->name); } gst_object_unref (el); ges_clip_take_add_error (clip, error); if (error && !no_errors) goto done; if (ges_timeline_take_track_selection_error (timeline, error)) { no_errors = FALSE; if (error) goto done; /* else, carry on as much as we can */ } } } /* set the tracks for the other children, with core elements first to * make sure the non-core can be placed above them in the track (a * non-core can not be in a track by itself) */ /* include just_added as a blacklist to ensure we do not try the track * selection a second time when track selection returns no tracks */ if (!_add_clip_children_to_tracks (timeline, clip, TRUE, new_track, just_added, error)) { no_errors = FALSE; if (error) goto done; } if (!_add_clip_children_to_tracks (timeline, clip, FALSE, new_track, just_added, error)) { no_errors = FALSE; if (error) goto done; } done: g_list_free_full (tracks, gst_object_unref); LOCK_DYN (timeline); gst_clear_object (&timeline->priv->new_track); UNLOCK_DYN (timeline); g_list_free (just_added); return no_errors; } static void layer_active_changed_cb (GESLayer * layer, gboolean active G_GNUC_UNUSED, GPtrArray * tracks G_GNUC_UNUSED, GESTimeline * timeline) { timeline_tree_reset_layer_active (timeline->priv->tree, layer); } static void layer_auto_transition_changed_cb (GESLayer * layer, GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline) { GList *tmp, *clips; timeline_tree_create_transitions (timeline->priv->tree, _create_auto_transition_from_transitions); clips = ges_layer_get_clips (layer); for (tmp = clips; tmp; tmp = tmp->next) { if (GES_IS_TRANSITION_CLIP (tmp->data)) { GList *tmpautotrans; gboolean found = FALSE; for (tmpautotrans = timeline->priv->auto_transitions; tmpautotrans; tmpautotrans = tmpautotrans->next) { if (GES_AUTO_TRANSITION (tmpautotrans->data)->transition_clip == tmp->data) { found = TRUE; break; } } if (!found) { GST_ERROR_OBJECT (timeline, "Transition %s could not be wrapped into an auto transition" " REMOVING it", GES_TIMELINE_ELEMENT_NAME (tmp->data)); ges_layer_remove_clip (layer, tmp->data); } } } g_list_free_full (clips, gst_object_unref); } /* returns TRUE if selecting of tracks did not error */ gboolean ges_timeline_add_clip (GESTimeline * timeline, GESClip * clip, GError ** error) { GESProject *project; gboolean ret; ges_timeline_element_set_timeline (GES_TIMELINE_ELEMENT (clip), timeline); /* We make sure not to be connected twice */ g_signal_handlers_disconnect_by_func (clip, clip_track_element_added_cb, timeline); g_signal_handlers_disconnect_by_func (clip, clip_track_element_removed_cb, timeline); /* And we connect to the object */ g_signal_connect (clip, "child-added", G_CALLBACK (clip_track_element_added_cb), timeline); g_signal_connect (clip, "child-removed", G_CALLBACK (clip_track_element_removed_cb), timeline); GST_DEBUG ("Making sure that the asset is in our project"); project = GES_PROJECT (ges_extractable_get_asset (GES_EXTRACTABLE (timeline))); ges_project_add_asset (project, ges_extractable_get_asset (GES_EXTRACTABLE (clip))); if (ges_clip_is_moving_from_layer (clip)) { GST_DEBUG ("Clip %p moving from one layer to another, not creating " "TrackElement", clip); /* timeline-tree handles creation of auto-transitions */ ret = TRUE; } else { ret = add_object_to_tracks (timeline, clip, NULL, error); } GST_DEBUG ("Done"); return ret; } static void layer_priority_changed_cb (GESLayer * layer, GParamSpec * arg G_GNUC_UNUSED, GESTimeline * timeline) { if (timeline->priv->resyncing_layers) return; timeline->layers = g_list_sort (timeline->layers, (GCompareFunc) sort_layers); } void ges_timeline_remove_clip (GESTimeline * timeline, GESClip * clip) { GList *tmp; if (ges_clip_is_moving_from_layer (clip)) { GST_DEBUG ("Clip %p is moving from a layer to another, not doing" " anything on it", clip); return; } GST_DEBUG_OBJECT (timeline, "Clip %" GES_FORMAT " removed from layer", GES_ARGS (clip)); LOCK_DYN (timeline); for (tmp = timeline->tracks; tmp; tmp = tmp->next) ges_clip_empty_from_track (clip, tmp->data); UNLOCK_DYN (timeline); g_signal_handlers_disconnect_by_func (clip, clip_track_element_added_cb, timeline); g_signal_handlers_disconnect_by_func (clip, clip_track_element_removed_cb, timeline); ges_timeline_element_set_timeline (GES_TIMELINE_ELEMENT (clip), NULL); GST_DEBUG ("Done"); } static gboolean update_stream_object (TrackPrivate * tr_priv) { gboolean res = FALSE; GstStreamType type = GST_STREAM_TYPE_UNKNOWN; gchar *stream_id; g_object_get (tr_priv->track, "id", &stream_id, NULL); if (tr_priv->track->type == GES_TRACK_TYPE_VIDEO) type = GST_STREAM_TYPE_VIDEO; if (tr_priv->track->type == GES_TRACK_TYPE_AUDIO) type = GST_STREAM_TYPE_AUDIO; if (!tr_priv->stream || g_strcmp0 (stream_id, gst_stream_get_stream_id (tr_priv->stream))) { res = TRUE; gst_object_replace ((GstObject **) & tr_priv->stream, (GstObject *) gst_stream_new (stream_id, (GstCaps *) ges_track_get_caps (tr_priv->track), type, GST_STREAM_FLAG_NONE) ); } g_free (stream_id); return res; } static GstPadProbeReturn _pad_probe_cb (GstPad * mixer_pad, GstPadProbeInfo * info, TrackPrivate * tr_priv) { GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info); GESTimeline *timeline = tr_priv->timeline; if (GST_EVENT_TYPE (event) == GST_EVENT_STREAM_START) { LOCK_DYN (timeline); if (timeline->priv->stream_start_group_id == -1) { if (!gst_event_parse_group_id (event, &timeline->priv->stream_start_group_id)) timeline->priv->stream_start_group_id = gst_util_group_id_next (); } gst_event_unref (event); event = info->data = gst_event_new_stream_start (gst_stream_get_stream_id (tr_priv->stream)); gst_event_set_stream (event, tr_priv->stream); gst_event_set_group_id (event, timeline->priv->stream_start_group_id); UNLOCK_DYN (timeline); return GST_PAD_PROBE_REMOVE; } return GST_PAD_PROBE_OK; } static void _ghost_track_srcpad (TrackPrivate * tr_priv) { GstPad *pad; gchar *padname; gboolean no_more; GList *tmp; GESTrack *track = tr_priv->track; pad = gst_element_get_static_pad (GST_ELEMENT (track), "src"); GST_DEBUG ("track:%p, pad:%s:%s", track, GST_DEBUG_PAD_NAME (pad)); /* Remember the pad */ LOCK_DYN (tr_priv->timeline); GST_OBJECT_LOCK (track); tr_priv->pad = pad; no_more = TRUE; for (tmp = tr_priv->timeline->priv->priv_tracks; tmp; tmp = g_list_next (tmp)) { TrackPrivate *tr_priv = (TrackPrivate *) tmp->data; if (!tr_priv->pad) { GST_LOG ("Found track without pad %p", tr_priv->track); no_more = FALSE; } } GST_OBJECT_UNLOCK (track); /* ghost it ! */ GST_DEBUG ("Ghosting pad and adding it to ourself"); padname = g_strdup_printf ("track_%p_src", track); tr_priv->ghostpad = gst_ghost_pad_new (padname, pad); g_free (padname); gst_pad_set_active (tr_priv->ghostpad, TRUE); gst_element_add_pad (GST_ELEMENT (tr_priv->timeline), tr_priv->ghostpad); if (no_more) { GST_DEBUG ("Signaling no-more-pads"); gst_element_no_more_pads (GST_ELEMENT (tr_priv->timeline)); } tr_priv->probe_id = gst_pad_add_probe (pad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM, (GstPadProbeCallback) _pad_probe_cb, tr_priv, NULL); UNLOCK_DYN (tr_priv->timeline); } gboolean timeline_add_element (GESTimeline * timeline, GESTimelineElement * element) { /* FIXME: handle NULL element->name */ GESTimelineElement *same_name = g_hash_table_lookup (timeline->priv->all_elements, element->name); GST_DEBUG_OBJECT (timeline, "Adding element: %s", element->name); if (same_name) { GST_ERROR_OBJECT (timeline, "%s Already in the timeline %" GST_PTR_FORMAT, element->name, same_name); return FALSE; } /* FIXME: why is the hash table using the name of the element, rather than * the pointer to the element itself as the key? This makes it awkward * to change the name of an element after it has been added. See * ges_timeline_element_set_name. It means we have to remove and then * re-add the element. */ g_hash_table_insert (timeline->priv->all_elements, ges_timeline_element_get_name (element), gst_object_ref (element)); timeline_tree_track_element (timeline->priv->tree, element); if (GES_IS_SOURCE (element)) { ges_source_set_rendering_smartly (GES_SOURCE (element), timeline->priv->rendering_smartly); } return TRUE; } gboolean timeline_remove_element (GESTimeline * timeline, GESTimelineElement * element) { if (g_hash_table_remove (timeline->priv->all_elements, element->name)) { timeline_tree_stop_tracking_element (timeline->priv->tree, element); return TRUE; } return FALSE; } void timeline_fill_gaps (GESTimeline * timeline) { GList *tmp; LOCK_DYN (timeline); for (tmp = timeline->tracks; tmp; tmp = tmp->next) { track_resort_and_fill_gaps (tmp->data); } UNLOCK_DYN (timeline); } GNode * timeline_get_tree (GESTimeline * timeline) { return timeline->priv->tree; } void ges_timeline_set_smart_rendering (GESTimeline * timeline, gboolean rendering_smartly) { if (rendering_smartly) { GList *tmp; for (tmp = timeline->tracks; tmp; tmp = tmp->next) { if (ges_track_get_mixing (tmp->data)) { GST_INFO_OBJECT (timeline, "Smart rendering will not" " work as track %" GST_PTR_FORMAT " is doing mixing", tmp->data); } else { ges_track_set_smart_rendering (tmp->data, rendering_smartly); } } } timeline_tree_set_smart_rendering (timeline->priv->tree, rendering_smartly); timeline->priv->rendering_smartly = rendering_smartly; } gboolean ges_timeline_get_smart_rendering (GESTimeline * timeline) { return timeline->priv->rendering_smartly; } /**** API *****/ /** * ges_timeline_new: * * Creates a new empty timeline. * * Returns: (transfer floating): The new timeline. */ GESTimeline * ges_timeline_new (void) { GESProject *project = ges_project_new (NULL); GESExtractable *timeline = g_object_new (GES_TYPE_TIMELINE, NULL); ges_extractable_set_asset (timeline, GES_ASSET (project)); gst_object_unref (project); return GES_TIMELINE (timeline); } /** * ges_timeline_new_from_uri: * @uri: The URI to load from * @error: An error to be set if loading fails, or * %NULL to ignore * * Creates a timeline from the given URI. * * Returns: (transfer floating): A new timeline if the uri was loaded * successfully, or %NULL if the uri could not be loaded. */ GESTimeline * ges_timeline_new_from_uri (const gchar * uri, GError ** error) { GESTimeline *ret; GESProject *project = ges_project_new (uri); ret = GES_TIMELINE (ges_asset_extract (GES_ASSET (project), error)); gst_object_unref (project); return ret; } /** * ges_timeline_load_from_uri: * @timeline: An empty #GESTimeline into which to load the formatter * @uri: The URI to load from * @error: An error to be set if loading fails, or * %NULL to ignore * * Loads the contents of URI into the timeline. * * Returns: %TRUE if the timeline was loaded successfully from @uri. */ gboolean ges_timeline_load_from_uri (GESTimeline * timeline, const gchar * uri, GError ** error) { GESProject *project; gboolean ret = FALSE; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); g_return_val_if_fail ((ges_extractable_get_asset (GES_EXTRACTABLE (timeline)) == NULL), FALSE); project = ges_project_new (uri); ret = ges_project_load (project, timeline, error); gst_object_unref (project); return ret; } /** * ges_timeline_save_to_uri: * @timeline: The #GESTimeline * @uri: The location to save to * @formatter_asset: (allow-none): The formatter asset to use, or %NULL * @overwrite: %TRUE to overwrite file if it exists * @error: An error to be set if saving fails, or * %NULL to ignore * * Saves the timeline to the given location. If @formatter_asset is %NULL, * the method will attempt to save in the same format the timeline was * loaded from, before defaulting to the formatter with highest rank. * * Returns: %TRUE if @timeline was successfully saved to @uri. */ gboolean ges_timeline_save_to_uri (GESTimeline * timeline, const gchar * uri, GESAsset * formatter_asset, gboolean overwrite, GError ** error) { GESProject *project; gboolean ret, created_proj = FALSE; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); project = GES_PROJECT (ges_extractable_get_asset (GES_EXTRACTABLE (timeline))); if (project == NULL) { project = ges_project_new (NULL); created_proj = TRUE; } ret = ges_project_save (project, timeline, uri, formatter_asset, overwrite, error); if (created_proj) gst_object_unref (project); return ret; } /** * ges_timeline_get_groups: * @timeline: The #GESTimeline * * Get the list of #GESGroup-s present in the timeline. * * Returns: (transfer none) (element-type GESGroup): The list of * groups that contain clips present in @timeline's layers. * Must not be changed. */ GList * ges_timeline_get_groups (GESTimeline * timeline) { g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL); CHECK_THREAD (timeline); return timeline->priv->groups; } /** * ges_timeline_append_layer: * @timeline: The #GESTimeline * * Append a newly created layer to the timeline. The layer will * be added at the lowest #GESLayer:priority (numerically, the highest). * * Returns: (transfer none): The newly created layer. */ GESLayer * ges_timeline_append_layer (GESTimeline * timeline) { GList *tmp; guint32 priority; GESLayer *layer; g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL); CHECK_THREAD (timeline); layer = ges_layer_new (); priority = 0; for (tmp = timeline->layers; tmp; tmp = tmp->next) priority = MAX (priority, ges_layer_get_priority (tmp->data) + 1); ges_layer_set_priority (layer, priority); ges_timeline_add_layer (timeline, layer); return layer; } /** * ges_timeline_add_layer: * @timeline: The #GESTimeline * @layer: (transfer floating): The layer to add * * Add a layer to the timeline. * * If the layer contains #GESClip-s, then this may trigger the creation of * their core track element children for the timeline's tracks, and the * placement of the clip's children in the tracks of the timeline using * #GESTimeline::select-tracks-for-object. Some errors may occur if this * would break one of the configuration rules of the timeline in one of * its tracks. In such cases, some track elements would fail to be added * to their tracks, but this method would still return %TRUE. As such, it * is advised that you only add clips to layers that already part of a * timeline. In such situations, ges_layer_add_clip() is able to fail if * adding the clip would cause such an error. * * Deprecated: 1.18: This method requires you to ensure the layer's * #GESLayer:priority will be unique to the timeline. Use * ges_timeline_append_layer() and ges_timeline_move_layer() instead. * * Returns: %TRUE if @layer was properly added. */ gboolean ges_timeline_add_layer (GESTimeline * timeline, GESLayer * layer) { gboolean auto_transition; GList *objects, *tmp; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); g_return_val_if_fail (GES_IS_LAYER (layer), FALSE); CHECK_THREAD (timeline); GST_DEBUG ("timeline:%p, layer:%p", timeline, layer); /* We can only add a layer that doesn't already belong to another timeline */ if (G_UNLIKELY (layer->timeline)) { GST_WARNING ("Layer belongs to another timeline, can't add it"); gst_object_ref_sink (layer); gst_object_unref (layer); return FALSE; } /* Add to the list of layers, make sure we don't already control it */ if (G_UNLIKELY (g_list_find (timeline->layers, (gconstpointer) layer))) { GST_WARNING ("Layer is already controlled by this timeline"); gst_object_ref_sink (layer); gst_object_unref (layer); return FALSE; } /* FIXME: ensure the layer->priority does not conflict with an existing * layer in the timeline. Currently can add several layers with equal * layer priorities */ auto_transition = ges_layer_get_auto_transition (layer); /* If the user doesn't explicitely set layer auto_transition, then set our */ if (!auto_transition) { auto_transition = ges_timeline_get_auto_transition (timeline); ges_layer_set_auto_transition (layer, auto_transition); } gst_object_ref_sink (layer); timeline->layers = g_list_insert_sorted (timeline->layers, layer, (GCompareFunc) sort_layers); /* Inform the layer that it belongs to a new timeline */ ges_layer_set_timeline (layer, timeline); /* Connect to 'clip-added'/'clip-removed' signal from the new layer */ g_signal_connect (layer, "notify::priority", G_CALLBACK (layer_priority_changed_cb), timeline); g_signal_connect (layer, "notify::auto-transition", G_CALLBACK (layer_auto_transition_changed_cb), timeline); g_signal_connect_after (layer, "active-changed", G_CALLBACK (layer_active_changed_cb), timeline); GST_DEBUG ("Done adding layer, emitting 'layer-added' signal"); g_signal_emit (timeline, ges_timeline_signals[LAYER_ADDED], 0, layer); /* add any existing clips to the timeline */ objects = ges_layer_get_clips (layer); for (tmp = objects; tmp; tmp = tmp->next) ges_timeline_add_clip (timeline, tmp->data, NULL); g_list_free_full (objects, gst_object_unref); return TRUE; } /** * ges_timeline_remove_layer: * @timeline: The #GESTimeline * @layer: The layer to remove * * Removes a layer from the timeline. * * Returns: %TRUE if @layer was properly removed. */ gboolean ges_timeline_remove_layer (GESTimeline * timeline, GESLayer * layer) { GList *layer_objects, *tmp; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); g_return_val_if_fail (GES_IS_LAYER (layer), FALSE); if (!timeline->priv->disposed) CHECK_THREAD (timeline); GST_DEBUG ("timeline:%p, layer:%p", timeline, layer); if (G_UNLIKELY (!g_list_find (timeline->layers, layer))) { GST_WARNING ("Layer doesn't belong to this timeline"); return FALSE; } /* remove objects from any private data structures */ layer_objects = ges_layer_get_clips (layer); for (tmp = layer_objects; tmp; tmp = tmp->next) ges_timeline_remove_clip (timeline, tmp->data); g_list_free_full (layer_objects, gst_object_unref); /* Disconnect signals */ GST_DEBUG ("Disconnecting signal callbacks"); g_signal_handlers_disconnect_by_func (layer, layer_priority_changed_cb, timeline); g_signal_handlers_disconnect_by_func (layer, layer_auto_transition_changed_cb, timeline); g_signal_handlers_disconnect_by_func (layer, layer_active_changed_cb, timeline); timeline->layers = g_list_remove (timeline->layers, layer); ges_layer_set_timeline (layer, NULL); /* FIXME: we should resync the layer priorities */ g_signal_emit (timeline, ges_timeline_signals[LAYER_REMOVED], 0, layer); gst_object_unref (layer); return TRUE; } /** * ges_timeline_add_track: * @timeline: The #GESTimeline * @track: (transfer full): The track to add * * Add a track to the timeline. * * If the timeline already contains clips, then this may trigger the * creation of their core track element children for the track, and the * placement of the clip's children in the track of the timeline using * #GESTimeline::select-tracks-for-object. Some errors may occur if this * would break one of the configuration rules for the timeline in the * track. In such cases, some track elements would fail to be added to the * track, but this method would still return %TRUE. As such, it is advised * that you avoid adding tracks to timelines that already contain clips. * * Returns: %TRUE if @track was properly added. */ /* FIXME: create track elements for clips which have already been * added to existing layers. */ gboolean ges_timeline_add_track (GESTimeline * timeline, GESTrack * track) { TrackPrivate *tr_priv; GList *tmp; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); g_return_val_if_fail (GES_IS_TRACK (track), FALSE); CHECK_THREAD (timeline); GST_DEBUG ("timeline:%p, track:%p", timeline, track); /* make sure we don't already control it */ LOCK_DYN (timeline); if (G_UNLIKELY (g_list_find (timeline->tracks, (gconstpointer) track))) { UNLOCK_DYN (timeline); GST_WARNING ("Track is already controlled by this timeline"); return FALSE; } /* Add the track to ourself (as a GstBin) * Reference is stolen ! */ if (G_UNLIKELY (!gst_bin_add (GST_BIN (timeline), GST_ELEMENT (track)))) { UNLOCK_DYN (timeline); GST_WARNING ("Couldn't add track to ourself (GST)"); return FALSE; } tr_priv = g_new0 (TrackPrivate, 1); tr_priv->timeline = timeline; tr_priv->track = track; tr_priv->track_element_added_sigid = g_signal_connect (track, "track-element-added", G_CALLBACK (track_element_added_cb), timeline); update_stream_object (tr_priv); gst_stream_collection_add_stream (timeline->priv->stream_collection, gst_object_ref (tr_priv->stream)); /* Add the track to the list of tracks we track */ timeline->priv->priv_tracks = g_list_append (timeline->priv->priv_tracks, tr_priv); timeline->tracks = g_list_append (timeline->tracks, track); /* Inform the track that it's currently being used by ourself */ ges_track_set_timeline (track, timeline); GST_DEBUG ("Done adding track, emitting 'track-added' signal"); _ghost_track_srcpad (tr_priv); UNLOCK_DYN (timeline); /* emit 'track-added' */ g_signal_emit (timeline, ges_timeline_signals[TRACK_ADDED], 0, track); /* ensure that each existing clip has the opportunity to create a * track element for this track*/ for (tmp = timeline->layers; tmp; tmp = tmp->next) { GList *objects, *obj; objects = ges_layer_get_clips (tmp->data); for (obj = objects; obj; obj = obj->next) add_object_to_tracks (timeline, obj->data, track, NULL); g_list_free_full (objects, gst_object_unref); } /* FIXME Check if we should rollback if we can't sync state */ gst_element_sync_state_with_parent (GST_ELEMENT (track)); g_object_set (track, "message-forward", TRUE, NULL); return TRUE; } /** * ges_timeline_remove_track: * @timeline: The #GESTimeline * @track: The track to remove * * Remove a track from the timeline. * * Returns: %TRUE if @track was properly removed. */ /* FIXME: release any track elements associated with this layer. currenly this * will not happen if you remove the track before removing *all* * clips which have a track element in this track. */ gboolean ges_timeline_remove_track (GESTimeline * timeline, GESTrack * track) { GList *tmp; TrackPrivate *tr_priv; GESTimelinePrivate *priv; g_return_val_if_fail (GES_IS_TRACK (track), FALSE); g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); GST_DEBUG ("timeline:%p, track:%p", timeline, track); priv = timeline->priv; LOCK_DYN (timeline); if (G_UNLIKELY (!(tmp = g_list_find_custom (priv->priv_tracks, track, (GCompareFunc) custom_find_track)))) { GST_WARNING ("Track doesn't belong to this timeline"); UNLOCK_DYN (timeline); return FALSE; } tr_priv = tmp->data; gst_object_unref (tr_priv->pad); priv->priv_tracks = g_list_remove (priv->priv_tracks, tr_priv); UNLOCK_DYN (timeline); /* empty track of all elements that belong to the timeline's clips */ /* elements with no parent can stay in the track, but their timeline * will be set to NULL when the track's timeline is set to NULL */ for (tmp = timeline->layers; tmp; tmp = tmp->next) { GList *clips, *clip; clips = ges_layer_get_clips (tmp->data); for (clip = clips; clip; clip = clip->next) ges_clip_empty_from_track (clip->data, track); g_list_free_full (clips, gst_object_unref); } timeline->tracks = g_list_remove (timeline->tracks, track); ges_track_set_timeline (track, NULL); /* Remove ghost pad */ if (tr_priv->ghostpad) { GST_DEBUG ("Removing ghostpad"); gst_pad_set_active (tr_priv->ghostpad, FALSE); gst_ghost_pad_set_target ((GstGhostPad *) tr_priv->ghostpad, NULL); gst_element_remove_pad (GST_ELEMENT (timeline), tr_priv->ghostpad); } /* Signal track removal to all layers/objects */ g_signal_emit (timeline, ges_timeline_signals[TRACK_REMOVED], 0, track); /* remove track from our bin */ gst_object_ref (track); if (G_UNLIKELY (!gst_bin_remove (GST_BIN (timeline), GST_ELEMENT (track)))) { GST_WARNING ("Couldn't remove track to ourself (GST)"); gst_object_unref (track); return FALSE; } g_signal_handler_disconnect (track, tr_priv->track_element_added_sigid); /* set track state to NULL */ gst_element_set_state (GST_ELEMENT (track), GST_STATE_NULL); gst_object_unref (track); g_free (tr_priv); return TRUE; } /** * ges_timeline_get_track_for_pad: * @timeline: The #GESTimeline * @pad: A pad * * Search for the #GESTrack corresponding to the given timeline's pad. * * Returns: (transfer none) (nullable): The track corresponding to @pad, * or %NULL if there is an error. */ GESTrack * ges_timeline_get_track_for_pad (GESTimeline * timeline, GstPad * pad) { GList *tmp; g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL); LOCK_DYN (timeline); for (tmp = timeline->priv->priv_tracks; tmp; tmp = g_list_next (tmp)) { TrackPrivate *tr_priv = (TrackPrivate *) tmp->data; if (pad == tr_priv->ghostpad) { UNLOCK_DYN (timeline); return tr_priv->track; } } UNLOCK_DYN (timeline); return NULL; } /** * ges_timeline_get_pad_for_track: * @timeline: The #GESTimeline * @track: A track * * Search for the #GstPad corresponding to the given timeline's track. * You can link to this pad to receive the output data of the given track. * * Returns: (transfer none) (nullable): The pad corresponding to @track, * or %NULL if there is an error. */ GstPad * ges_timeline_get_pad_for_track (GESTimeline * timeline, GESTrack * track) { GList *tmp; LOCK_DYN (timeline); for (tmp = timeline->priv->priv_tracks; tmp; tmp = g_list_next (tmp)) { TrackPrivate *tr_priv = (TrackPrivate *) tmp->data; if (track == tr_priv->track) { if (tr_priv->ghostpad) gst_object_ref (tr_priv->ghostpad); UNLOCK_DYN (timeline); return tr_priv->ghostpad; } } UNLOCK_DYN (timeline); return NULL; } /** * ges_timeline_get_tracks: * @timeline: The #GESTimeline * * Get the list of #GESTrack-s used by the timeline. * * Returns: (transfer full) (element-type GESTrack): The list of tracks * used by @timeline. */ GList * ges_timeline_get_tracks (GESTimeline * timeline) { GList *res = NULL; g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL); LOCK_DYN (timeline); res = g_list_copy_deep (timeline->tracks, (GCopyFunc) gst_object_ref, NULL); UNLOCK_DYN (timeline); return res; } /** * ges_timeline_get_layers: * @timeline: The #GESTimeline * * Get the list of #GESLayer-s present in the timeline. * * Returns: (transfer full) (element-type GESLayer): The list of * layers present in @timeline sorted by priority. */ GList * ges_timeline_get_layers (GESTimeline * timeline) { GList *tmp, *res = NULL; g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL); CHECK_THREAD (timeline); for (tmp = timeline->layers; tmp; tmp = g_list_next (tmp)) { res = g_list_insert_sorted (res, gst_object_ref (tmp->data), (GCompareFunc) sort_layers); } return res; } static void track_commited_cb (GESTrack * track, GESTimeline * timeline) { gboolean emit_commited = FALSE; GST_OBJECT_LOCK (timeline); timeline->priv->expected_commited -= 1; if (timeline->priv->expected_commited == 0) emit_commited = TRUE; g_signal_handlers_disconnect_by_func (track, track_commited_cb, timeline); GST_OBJECT_UNLOCK (timeline); if (emit_commited) { g_signal_emit (timeline, ges_timeline_signals[COMMITED], 0); } } /* Must be called with the timeline's DYN_LOCK */ static gboolean ges_timeline_commit_unlocked (GESTimeline * timeline) { GList *tmp; gboolean res = TRUE; if (timeline->priv->commit_frozen) { GST_DEBUG_OBJECT (timeline, "commit locked"); timeline->priv->commit_delayed = TRUE; return res; } GST_DEBUG_OBJECT (timeline, "commiting changes"); timeline_tree_create_transitions (timeline->priv->tree, ges_timeline_find_auto_transition); for (tmp = timeline->layers; tmp; tmp = tmp->next) { GESLayer *layer = tmp->data; /* Ensure clip priorities are correct after an edit */ ges_layer_resync_priorities (layer); } timeline->priv->expected_commited = g_list_length (timeline->priv->priv_tracks); if (timeline->priv->expected_commited == 0) { g_signal_emit (timeline, ges_timeline_signals[COMMITED], 0); } else { GstStreamCollection *collection = gst_stream_collection_new (NULL); LOCK_DYN (timeline); for (tmp = timeline->tracks; tmp; tmp = tmp->next) { TrackPrivate *tr_priv = g_list_find_custom (timeline->priv->priv_tracks, tmp->data, (GCompareFunc) custom_find_track)->data; update_stream_object (tr_priv); gst_stream_collection_add_stream (collection, gst_object_ref (tr_priv->stream)); g_signal_connect (tmp->data, "commited", G_CALLBACK (track_commited_cb), timeline); if (!ges_track_commit (GES_TRACK (tmp->data))) res = FALSE; } gst_object_unref (timeline->priv->stream_collection); timeline->priv->stream_collection = collection; UNLOCK_DYN (timeline); } return res; } /** * ges_timeline_commit: * @timeline: A #GESTimeline * * Commit all the pending changes of the clips contained in the * timeline. * * When changes happen in a timeline, they are not immediately executed * internally, in a way that effects the output data of the timeline. You * should call this method when you are done with a set of changes and you * want them to be executed. * * Any pending changes will be executed in the backend. The * #GESTimeline::commited signal will be emitted once this has completed. * You should not try to change the state of the timeline, seek it or add * tracks to it before receiving this signal. You can use * ges_timeline_commit_sync() if you do not want to perform other tasks in * the mean time. * * Note that all the pending changes will automatically be executed when * the timeline goes from #GST_STATE_READY to #GST_STATE_PAUSED, which is * usually triggered by a corresponding state changes in a containing * #GESPipeline. * * Returns: %TRUE if pending changes were committed, or %FALSE if nothing * needed to be committed. */ gboolean ges_timeline_commit (GESTimeline * timeline) { gboolean ret; GstStreamCollection *pcollection = timeline->priv->stream_collection; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); LOCK_DYN (timeline); ret = ges_timeline_commit_unlocked (timeline); UNLOCK_DYN (timeline); if (pcollection != timeline->priv->stream_collection) { gst_element_post_message ((GstElement *) timeline, gst_message_new_stream_collection ((GstObject *) timeline, timeline->priv->stream_collection)); } ges_timeline_emit_snapping (timeline, NULL, NULL, GST_CLOCK_TIME_NONE); return ret; } static void commited_cb (GESTimeline * timeline) { g_mutex_lock (&timeline->priv->commited_lock); g_cond_signal (&timeline->priv->commited_cond); g_mutex_unlock (&timeline->priv->commited_lock); } /** * ges_timeline_commit_sync: * @timeline: A #GESTimeline * * Commit all the pending changes of the clips contained in the * timeline and wait for the changes to complete. * * See ges_timeline_commit(). * * Returns: %TRUE if pending changes were committed, or %FALSE if nothing * needed to be committed. */ gboolean ges_timeline_commit_sync (GESTimeline * timeline) { gboolean ret; gboolean wait_for_signal; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); /* Let's make sure our state is stable */ gst_element_get_state (GST_ELEMENT (timeline), NULL, NULL, GST_CLOCK_TIME_NONE); /* Let's make sure no track gets added between now and the actual commiting */ LOCK_DYN (timeline); wait_for_signal = g_list_length (timeline->priv->priv_tracks) > 0 && GST_STATE (timeline) >= GST_STATE_PAUSED; if (!wait_for_signal) { ret = ges_timeline_commit_unlocked (timeline); } else { gulong handler_id = g_signal_connect (timeline, "commited", (GCallback) commited_cb, NULL); g_mutex_lock (&timeline->priv->commited_lock); ret = ges_timeline_commit_unlocked (timeline); g_cond_wait (&timeline->priv->commited_cond, &timeline->priv->commited_lock); g_mutex_unlock (&timeline->priv->commited_lock); g_signal_handler_disconnect (timeline, handler_id); } UNLOCK_DYN (timeline); return ret; } /** * ges_timeline_freeze_commit: * @timeline: The #GESTimeline * * Freezes the timeline from being committed. This is usually needed while the * timeline is being rendered to ensure that not change to the timeline are * taken into account during that moment. Once the rendering is done, you * should call #ges_timeline_thaw_commit so that comiting becomes possible * again and any call to `commit()` that happened during the rendering is * actually taken into account. * * Since: 1.20 * */ void ges_timeline_freeze_commit (GESTimeline * timeline) { LOCK_DYN (timeline); timeline->priv->commit_frozen = TRUE; UNLOCK_DYN (timeline); } /** * ges_timeline_thaw_commit: * @timeline: The #GESTimeline * * Thaw the timeline so that comiting becomes possible * again and any call to `commit()` that happened during the rendering is * actually taken into account. * * Since: 1.20 * */ void ges_timeline_thaw_commit (GESTimeline * timeline) { LOCK_DYN (timeline); timeline->priv->commit_frozen = FALSE; UNLOCK_DYN (timeline); if (timeline->priv->commit_delayed) { ges_timeline_commit (timeline); timeline->priv->commit_delayed = FALSE; } } /** * ges_timeline_get_duration: * @timeline: The #GESTimeline * * Get the current #GESTimeline:duration of the timeline * * Returns: The current duration of @timeline. */ GstClockTime ges_timeline_get_duration (GESTimeline * timeline) { g_return_val_if_fail (GES_IS_TIMELINE (timeline), GST_CLOCK_TIME_NONE); CHECK_THREAD (timeline); return timeline->priv->duration; } /** * ges_timeline_get_auto_transition: * @timeline: The #GESTimeline * * Gets #GESTimeline:auto-transition for the timeline. * * Returns: The auto-transition of @self. */ gboolean ges_timeline_get_auto_transition (GESTimeline * timeline) { g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); CHECK_THREAD (timeline); return timeline->priv->auto_transition; } /** * ges_timeline_set_auto_transition: * @timeline: The #GESTimeline * @auto_transition: Whether transitions should be automatically added * to @timeline's layers * * Sets #GESTimeline:auto-transition for the timeline. This will also set * the corresponding #GESLayer:auto-transition for all of the timeline's * layers to the same value. See ges_layer_set_auto_transition() if you * wish to set the layer's #GESLayer:auto-transition individually. */ void ges_timeline_set_auto_transition (GESTimeline * timeline, gboolean auto_transition) { GList *layers; GESLayer *layer; g_return_if_fail (GES_IS_TIMELINE (timeline)); CHECK_THREAD (timeline); timeline->priv->auto_transition = auto_transition; g_object_notify (G_OBJECT (timeline), "auto-transition"); layers = timeline->layers; for (; layers; layers = layers->next) { layer = layers->data; ges_layer_set_auto_transition (layer, auto_transition); } } /** * ges_timeline_get_snapping_distance: * @timeline: The #GESTimeline * * Gets the #GESTimeline:snapping-distance for the timeline. * * Returns: The snapping distance (in nanoseconds) of @timeline. */ GstClockTime ges_timeline_get_snapping_distance (GESTimeline * timeline) { g_return_val_if_fail (GES_IS_TIMELINE (timeline), GST_CLOCK_TIME_NONE); CHECK_THREAD (timeline); return timeline->priv->snapping_distance; } /** * ges_timeline_set_snapping_distance: * @timeline: The #GESTimeline * @snapping_distance: The snapping distance to use (in nanoseconds) * * Sets #GESTimeline:snapping-distance for the timeline. This new value * will only effect future snappings and will not be used to snap the * current element positions within the timeline. */ void ges_timeline_set_snapping_distance (GESTimeline * timeline, GstClockTime snapping_distance) { g_return_if_fail (GES_IS_TIMELINE (timeline)); g_return_if_fail (GST_CLOCK_TIME_IS_VALID (snapping_distance)); CHECK_THREAD (timeline); timeline->priv->snapping_distance = snapping_distance; } /** * ges_timeline_get_element: * @timeline: The #GESTimeline * @name: The name of the element to find * * Gets the element contained in the timeline with the given name. * * Returns: (transfer full) (nullable): The timeline element in @timeline * with the given @name, or %NULL if it was not found. */ GESTimelineElement * ges_timeline_get_element (GESTimeline * timeline, const gchar * name) { GESTimelineElement *ret; g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL); CHECK_THREAD (timeline); /* FIXME: handle NULL name */ ret = g_hash_table_lookup (timeline->priv->all_elements, name); if (ret) return gst_object_ref (ret); #ifndef GST_DISABLE_GST_DEBUG { GList *element_names, *tmp; element_names = g_hash_table_get_keys (timeline->priv->all_elements); GST_INFO_OBJECT (timeline, "Does not contain element %s", name); for (tmp = element_names; tmp; tmp = tmp->next) { GST_DEBUG_OBJECT (timeline, "Containes: %s", (gchar *) tmp->data); } g_list_free (element_names); } #endif return NULL; } /** * ges_timeline_is_empty: * @timeline: The #GESTimeline * * Check whether the timeline is empty or not. * * Returns: %TRUE if @timeline is empty. */ gboolean ges_timeline_is_empty (GESTimeline * timeline) { GHashTableIter iter; gpointer key, value; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); CHECK_THREAD (timeline); if (g_hash_table_size (timeline->priv->all_elements) == 0) return TRUE; g_hash_table_iter_init (&iter, timeline->priv->all_elements); while (g_hash_table_iter_next (&iter, &key, &value)) { if (GES_IS_SOURCE (value) && ges_track_element_is_active (GES_TRACK_ELEMENT (value))) return FALSE; } return TRUE; } /** * ges_timeline_get_layer: * @timeline: The #GESTimeline to retrieve a layer from * @priority: The priority/index of the layer to find * * Retrieve the layer whose index in the timeline matches the given * priority. * * Returns: (transfer full) (nullable): The layer with the given * @priority, or %NULL if none was found. * * Since 1.6 */ GESLayer * ges_timeline_get_layer (GESTimeline * timeline, guint priority) { GList *tmp; GESLayer *layer = NULL; g_return_val_if_fail (GES_IS_TIMELINE (timeline), NULL); CHECK_THREAD (timeline); for (tmp = timeline->layers; tmp; tmp = tmp->next) { GESLayer *tmp_layer = GES_LAYER (tmp->data); guint tmp_priority; g_object_get (tmp_layer, "priority", &tmp_priority, NULL); if (tmp_priority == priority) { layer = gst_object_ref (tmp_layer); break; } } return layer; } gboolean ges_timeline_layer_priority_in_gap (GESTimeline * timeline, guint priority) { GList *tmp; CHECK_THREAD (timeline); for (tmp = timeline->layers; tmp; tmp = tmp->next) { GESLayer *layer = GES_LAYER (tmp->data); guint tmp_priority = ges_layer_get_priority (layer); if (tmp_priority == priority) return FALSE; else if (tmp_priority > priority) return TRUE; } return FALSE; } /** * ges_timeline_paste_element: * @timeline: The #GESTimeline onto which @element should be pasted * @element: The element to paste * @position: The position in the timeline @element should be pasted to, * i.e. the #GESTimelineElement:start value for the pasted element. * @layer_priority: The layer into which the element should be pasted. * -1 means paste to the same layer from which @element has been copied from * * Paste an element inside the timeline. @element **must** be the return of * ges_timeline_element_copy() with `deep=TRUE`, * and it should not be changed before pasting. @element itself is not * placed in the timeline, instead a new element is created, alike to the * originally copied element. Note that the originally copied element must * also lie within @timeline, at both the point of copying and pasting. * * Pasting may fail if it would place the timeline in an unsupported * configuration. * * After calling this function @element should not be used. In particular, * @element can **not** be pasted again. Instead, you can copy the * returned element and paste that copy (although, this is only possible * if the paste was successful). * * See also ges_timeline_element_paste(). * * Returns: (transfer full) (nullable): The newly created element, or * %NULL if pasting fails. */ GESTimelineElement * ges_timeline_paste_element (GESTimeline * timeline, GESTimelineElement * element, GstClockTime position, gint layer_priority) { GESTimelineElement *res, *copied_from; GESTimelineElementClass *element_class; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); g_return_val_if_fail (GES_IS_TIMELINE_ELEMENT (element), FALSE); g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (position), FALSE); CHECK_THREAD (timeline); element_class = GES_TIMELINE_ELEMENT_GET_CLASS (element); /* steal ownership of the copied element */ copied_from = ges_timeline_element_get_copied_from (element); if (!copied_from) { GST_ERROR_OBJECT (element, "Is not being 'deeply' copied!"); return NULL; } if (!element_class->paste) { GST_ERROR_OBJECT (element, "No paste vmethod implemented"); gst_object_unref (copied_from); return NULL; } /* * Currently the API only supports pasting onto the same layer from which * the @element has been copied from, i.e., @layer_priority needs to be -1. */ if (layer_priority != -1) { GST_WARNING_OBJECT (timeline, "Only -1 value for layer priority is supported"); gst_object_unref (copied_from); return NULL; } res = element_class->paste (element, copied_from, position); gst_object_unref (copied_from); return res ? g_object_ref_sink (res) : res; } /** * ges_timeline_move_layer: * @timeline: A #GESTimeline * @layer: A layer within @timeline, whose priority should be changed * @new_layer_priority: The new index for @layer * * Moves a layer within the timeline to the index given by * @new_layer_priority. * An index of 0 corresponds to the layer with the highest priority in a * timeline. If @new_layer_priority is greater than the number of layers * present in the timeline, it will become the lowest priority layer. * * Since: 1.16 */ gboolean ges_timeline_move_layer (GESTimeline * timeline, GESLayer * layer, guint new_layer_priority) { gint current_priority; g_return_val_if_fail (GES_IS_TIMELINE (timeline), FALSE); g_return_val_if_fail (GES_IS_LAYER (layer), FALSE); g_return_val_if_fail (ges_layer_get_timeline (layer) == timeline, FALSE); CHECK_THREAD (timeline); current_priority = ges_layer_get_priority (layer); if (new_layer_priority == current_priority) { GST_DEBUG_OBJECT (timeline, "Nothing to do for %" GST_PTR_FORMAT ", same priorities", layer); return TRUE; } timeline->layers = g_list_remove (timeline->layers, layer); timeline->layers = g_list_insert (timeline->layers, layer, (gint) new_layer_priority); _resync_layers (timeline); return TRUE; } /** * ges_timeline_get_frame_time: * @self: The self on which to retrieve the timestamp for @frame_number * @frame_number: The frame number to get the corresponding timestamp of in the * timeline coordinates * * This method allows you to convert a timeline output frame number into a * timeline #GstClockTime. For example, this time could be used to seek to a * particular frame in the timeline's output, or as the edit position for * an element within the timeline. * * Returns: The timestamp corresponding to @frame_number in the output of @self. * * Since: 1.18 */ GstClockTime ges_timeline_get_frame_time (GESTimeline * self, GESFrameNumber frame_number) { gint fps_n, fps_d; g_return_val_if_fail (GES_IS_TIMELINE (self), GST_CLOCK_TIME_NONE); g_return_val_if_fail (GES_FRAME_NUMBER_IS_VALID (frame_number), GST_CLOCK_TIME_NONE); timeline_get_framerate (self, &fps_n, &fps_d); return gst_util_uint64_scale_ceil (frame_number, fps_d * GST_SECOND, fps_n); } /** * ges_timeline_get_frame_at: * @self: A #GESTimeline * @timestamp: The timestamp to get the corresponding frame number of * * This method allows you to convert a timeline #GstClockTime into its * corresponding #GESFrameNumber in the timeline's output. * * Returns: The frame number @timestamp corresponds to. * * Since: 1.18 */ GESFrameNumber ges_timeline_get_frame_at (GESTimeline * self, GstClockTime timestamp) { gint fps_n, fps_d; g_return_val_if_fail (GES_IS_TIMELINE (self), GES_FRAME_NUMBER_NONE); g_return_val_if_fail (GST_CLOCK_TIME_IS_VALID (timestamp), GES_FRAME_NUMBER_NONE); timeline_get_framerate (self, &fps_n, &fps_d); return gst_util_uint64_scale (timestamp, fps_n, fps_d * GST_SECOND); }