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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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GESTimeline: Use GstDiscoverer for incomplete filesources
If a GESTimelineFileSource is added to a layer and: * It doesn't have specified supported formats * OR it doesn't have a specified maximum duration * OR it doesn't have a specifed duration Then we asynchronously send it to the GstDiscoverer. If this happens, the state change of the timeline from READY to PAUSED will happen asynchronously and be completed when everything has been properly discovered. Part 2 of GstDiscoverer integration
This commit is contained in:
Edward Hervey
parent
eb4b02f3ed
commit
1bb45a61a6
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@ -60,9 +60,19 @@ enum
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LAST_SIGNAL
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};
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static GstBinClass *parent_class;
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static guint ges_timeline_signals[LAST_SIGNAL] = { 0 };
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gint custom_find_track (TrackPrivate * priv, GESTrack * track);
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static GstStateChangeReturn
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ges_timeline_change_state (GstElement * element, GstStateChange transition);
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static void
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discoverer_ready_cb (GstDiscoverer * discoverer, GESTimeline * timeline);
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static void
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discoverer_discovered_cb (GstDiscoverer * discoverer,
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GstDiscovererInformation * info, GError * err, GESTimeline * timeline);
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static void
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ges_timeline_get_property (GObject * object, guint property_id,
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GValue * value, GParamSpec * pspec)
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@ -86,6 +96,13 @@ ges_timeline_set_property (GObject * object, guint property_id,
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static void
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ges_timeline_dispose (GObject * object)
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{
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GESTimeline *timeline = GES_TIMELINE (object);
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if (timeline->discoverer) {
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gst_discoverer_stop (timeline->discoverer);
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g_object_unref (timeline->discoverer);
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timeline->discoverer = NULL;
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}
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G_OBJECT_CLASS (ges_timeline_parent_class)->dispose (object);
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}
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@ -99,13 +116,17 @@ static void
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ges_timeline_class_init (GESTimelineClass * klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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parent_class = g_type_class_peek_parent (klass);
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element_class->change_state = ges_timeline_change_state;
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object_class->get_property = ges_timeline_get_property;
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object_class->set_property = ges_timeline_set_property;
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object_class->dispose = ges_timeline_dispose;
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object_class->finalize = ges_timeline_finalize;
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/**
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* GESTimeline::track-added
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* @timeline: the #GESTimeline
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@ -161,6 +182,14 @@ ges_timeline_init (GESTimeline * self)
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{
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self->layers = NULL;
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self->tracks = NULL;
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/* New discoverer with a 15s timeout */
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self->discoverer = gst_discoverer_new (15 * GST_SECOND);
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g_signal_connect (self->discoverer, "ready", G_CALLBACK (discoverer_ready_cb),
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self);
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g_signal_connect (self->discoverer, "discovered",
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G_CALLBACK (discoverer_discovered_cb), self);
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gst_discoverer_start (self->discoverer);
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}
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/**
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@ -216,13 +245,10 @@ ges_timeline_save (GESTimeline * timeline, gchar * uri)
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}
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static void
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layer_object_added_cb (GESTimelineLayer * layer, GESTimelineObject * object,
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GESTimeline * timeline)
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add_object_to_tracks (GESTimeline * timeline, GESTimelineObject * object)
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{
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GList *tmp;
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GST_DEBUG ("New TimelineObject %p added to layer %p", object, layer);
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for (tmp = timeline->tracks; tmp; tmp = g_list_next (tmp)) {
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TrackPrivate *priv = (TrackPrivate *) tmp->data;
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GESTrack *track = priv->track;
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@ -239,6 +265,151 @@ layer_object_added_cb (GESTimelineLayer * layer, GESTimelineObject * object,
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GST_LOG ("Got new TrackObject %p, adding it to track", trobj);
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ges_track_add_object (track, trobj);
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}
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}
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static void
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do_async_start (GESTimeline * timeline)
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{
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GstMessage *message;
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timeline->async_pending = TRUE;
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message = gst_message_new_async_start (GST_OBJECT_CAST (timeline), FALSE);
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parent_class->handle_message (GST_BIN_CAST (timeline), message);
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}
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static void
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do_async_done (GESTimeline * timeline)
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{
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GstMessage *message;
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if (timeline->async_pending) {
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GST_DEBUG_OBJECT (timeline, "Emitting async-done");
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message = gst_message_new_async_done (GST_OBJECT_CAST (timeline));
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parent_class->handle_message (GST_BIN_CAST (timeline), message);
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timeline->async_pending = FALSE;
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}
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}
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static void
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discoverer_ready_cb (GstDiscoverer * discoverer, GESTimeline * timeline)
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{
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do_async_done (timeline);
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}
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static void
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discoverer_discovered_cb (GstDiscoverer * discoverer,
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GstDiscovererInformation * info, GError * err, GESTimeline * timeline)
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{
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GList *tmp;
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gboolean found = FALSE;
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GESTimelineFileSource *tfs = NULL;
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GST_DEBUG ("Discovered uri %s", info->uri);
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/* Find corresponding TimelineFileSource in the sources */
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for (tmp = timeline->pendingobjects; tmp; tmp = tmp->next) {
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tfs = (GESTimelineFileSource *) tmp->data;
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if (!g_strcmp0 (tfs->uri, info->uri)) {
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found = TRUE;
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break;
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}
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}
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if (found) {
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/* Remove object from list */
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timeline->pendingobjects =
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g_list_delete_link (timeline->pendingobjects, tmp);
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/* FIXME : Handle errors in discovery */
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/* Update timelinefilesource properties based on info */
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for (tmp = info->stream_list; tmp; tmp = tmp->next) {
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GstStreamInformation *sinf = (GstStreamInformation *) tmp->data;
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if (sinf->streamtype == GST_STREAM_AUDIO)
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tfs->supportedformats |= GES_TRACK_TYPE_AUDIO;
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else if ((sinf->streamtype == GST_STREAM_VIDEO) ||
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(sinf->streamtype == GST_STREAM_IMAGE))
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tfs->supportedformats |= GES_TRACK_TYPE_VIDEO;
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}
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g_object_set (tfs, "max-duration", info->duration, NULL);
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/* Continue the processing on tfs */
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add_object_to_tracks (timeline, GES_TIMELINE_OBJECT (tfs));
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}
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}
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static GstStateChangeReturn
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ges_timeline_change_state (GstElement * element, GstStateChange transition)
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{
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GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
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GESTimeline *timeline = GES_TIMELINE (element);
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_PAUSED:
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if (timeline->pendingobjects) {
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do_async_start (timeline);
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ret = GST_STATE_CHANGE_ASYNC;
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}
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break;
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default:
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break;
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}
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{
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GstStateChangeReturn bret;
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bret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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if (G_UNLIKELY (bret == GST_STATE_CHANGE_NO_PREROLL)) {
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do_async_done (timeline);
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ret = bret;
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}
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}
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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do_async_done (timeline);
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break;
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default:
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break;
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}
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return ret;
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}
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static void
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layer_object_added_cb (GESTimelineLayer * layer, GESTimelineObject * object,
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GESTimeline * timeline)
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{
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GList *tmp;
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GST_DEBUG ("New TimelineObject %p added to layer %p", object, layer);
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if (GES_IS_TIMELINE_FILE_SOURCE (object)) {
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GESTimelineFileSource *tfs = GES_TIMELINE_FILE_SOURCE (object);
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/* Send the filesource to the discoverer if:
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* * it doesn't have specified supported formats
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* * OR it doesn't have a specified max-duration
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* * OR it doesn't have a valid duration */
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if (tfs->supportedformats == GES_TRACK_TYPE_UNKNOWN ||
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tfs->maxduration == GST_CLOCK_TIME_NONE || object->duration == 0) {
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GST_LOG ("Incomplete TimelineFileSource, discovering it");
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timeline->pendingobjects =
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g_list_append (timeline->pendingobjects, object);
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gst_discoverer_append_uri (timeline->discoverer,
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GES_TIMELINE_FILE_SOURCE (object)->uri);
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} else
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add_object_to_tracks (timeline, object);
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} else {
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add_object_to_tracks (timeline, object);
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}
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GST_DEBUG ("done");
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}
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@ -23,6 +23,7 @@
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#include <glib-object.h>
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#include <gst/gst.h>
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#include <gst/discoverer/gstdiscoverer.h>
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#include <ges/ges-types.h>
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G_BEGIN_DECLS
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@ -54,6 +55,13 @@ struct _GESTimeline {
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/*< private >*/
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GList *layers; /* A list of GESTimelineLayer sorted by priority */
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GList *tracks; /* A list of private track data */
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/* discoverer used for virgin sources */
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GstDiscoverer *discoverer;
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/* Objects that are being discovered FIXME : LOCK ! */
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GList *pendingobjects;
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/* Whether we are changing state asynchronously or not */
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gboolean async_pending;
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};
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struct _GESTimelineClass {
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