From 3e49850e6d53b8fb0c3f23d2ab181d1161fa41fa Mon Sep 17 00:00:00 2001
From: Thibault Saunier <tsaunier@gnome.org>
Date: Fri, 20 Feb 2015 12:24:49 +0100
Subject: [PATCH] timeline: Add API to find a layer with a specific priority in
 a timeline

Summary:
API:
  * ges_timeline_get_layer

Test Plan: Nan

Reviewers: mathieu.duponchelle
---
 docs/libs/ges-sections.txt |  1 +
 ges/ges-timeline.c         | 31 +++++++++++++++++++++++++++++++
 ges/ges-timeline.h         |  1 +
 3 files changed, 33 insertions(+)

diff --git a/docs/libs/ges-sections.txt b/docs/libs/ges-sections.txt
index 570caba1..1d467dc 100644
--- a/docs/libs/ges-sections.txt
+++ b/docs/libs/ges-sections.txt
@@ -366,6 +366,7 @@ ges_timeline_enable_update
 ges_timeline_is_updating
 <SUBSECTION usage>
 ges_timeline_get_tracks
+ges_timeline_get_layer
 ges_timeline_get_layers
 ges_timeline_get_track_for_pad
 ges_timeline_get_pad_for_track
diff --git a/ges/ges-timeline.c b/ges/ges-timeline.c
index b753f9e..5b67253 100644
--- a/ges/ges-timeline.c
+++ b/ges/ges-timeline.c
@@ -3214,3 +3214,34 @@ ges_timeline_is_empty (GESTimeline * timeline)
 
   return TRUE;
 }
+
+/**
+ * ges_timeline_get_layer:
+ * @timeline: The #GESTimeline to retrive a layer from
+ * @priority: The priority of the layer to find
+ *
+ * Retrieve the layer with @priority as a priority
+ *
+ * Returns: A #GESLayer or %NULL if no layer with @priority was found
+ *
+ * Since 1.6
+ */
+GESLayer *
+ges_timeline_get_layer (GESTimeline * timeline, guint priority)
+{
+  GList *tmp;
+  GESLayer *layer = NULL;
+
+  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;
+}
diff --git a/ges/ges-timeline.h b/ges/ges-timeline.h
index bbcc83a..fd5e6ec 100644
--- a/ges/ges-timeline.h
+++ b/ges/ges-timeline.h
@@ -109,6 +109,7 @@ gboolean ges_timeline_add_layer (GESTimeline *timeline, GESLayer *layer);
 GESLayer * ges_timeline_append_layer (GESTimeline * timeline);
 gboolean ges_timeline_remove_layer (GESTimeline *timeline, GESLayer *layer);
 GList* ges_timeline_get_layers (GESTimeline *timeline);
+GESLayer* ges_timeline_get_layer (GESTimeline *timeline, guint priority);
 
 gboolean ges_timeline_add_track (GESTimeline *timeline, GESTrack *track);
 gboolean ges_timeline_remove_track (GESTimeline *timeline, GESTrack *track);
-- 
2.7.4