[clutter-gst/clutter-gst-2.0] player: prevent crashes when audio changes are processed after deinit()

[Lionel Landwerlin <llandwerlin src gnome org>]

commit e34e3f108d3256f9530003d01a13b20b47159822
Author: Lionel Landwerlin <llandwerlin gmail com>
Date:   Wed Sep 18 14:41:15 2013 +0100

    player: prevent crashes when audio changes are processed after deinit()

 clutter-gst/clutter-gst-player.c |   36 ++++++++++++++++++++++--------------
 1 files changed, 22 insertions(+), 14 deletions(-)
---
diff --git a/clutter-gst/clutter-gst-player.c b/clutter-gst/clutter-gst-player.c
index 0cd1e05..2845ad2 100644
--- a/clutter-gst/clutter-gst-player.c
+++ b/clutter-gst/clutter-gst-player.c
@@ -1205,14 +1205,16 @@ on_volume_changed_main_context (gpointer data)
 {
   ClutterGstPlayer *player = CLUTTER_GST_PLAYER (data);
   ClutterGstPlayerPrivate *priv = PLAYER_GET_PRIVATE (player);
-  gdouble volume;
 
-  volume =
-    gst_stream_volume_get_volume (GST_STREAM_VOLUME (priv->pipeline),
-                                  GST_STREAM_VOLUME_FORMAT_CUBIC);
-  priv->volume = volume;
+  if (priv)
+    {
+      gdouble volume =
+        gst_stream_volume_get_volume (GST_STREAM_VOLUME (priv->pipeline),
+                                      GST_STREAM_VOLUME_FORMAT_CUBIC);
+      priv->volume = volume;
 
-  g_object_notify (G_OBJECT (player), "audio-volume");
+      g_object_notify (G_OBJECT (player), "audio-volume");
+    }
 
   g_object_unref (player);
 
@@ -1261,12 +1263,15 @@ on_audio_changed_main_context (gpointer data)
   ClutterGstPlayer *player = CLUTTER_GST_PLAYER (data);
   ClutterGstPlayerPrivate *priv = PLAYER_GET_PRIVATE (player);
 
-  free_tags_list (&priv->audio_streams);
-  priv->audio_streams = get_tags (priv->pipeline, "n-audio", "get-audio-tags");
+  if (priv)
+    {
+      free_tags_list (&priv->audio_streams);
+      priv->audio_streams = get_tags (priv->pipeline, "n-audio", "get-audio-tags");
 
-  CLUTTER_GST_NOTE (AUDIO_STREAM, "audio-streams changed");
+      CLUTTER_GST_NOTE (AUDIO_STREAM, "audio-streams changed");
 
-  g_object_notify (G_OBJECT (player), "audio-streams");
+      g_object_notify (G_OBJECT (player), "audio-streams");
+    }
 
   g_object_unref (player);
 
@@ -1323,12 +1328,15 @@ on_text_changed_main_context (gpointer data)
   ClutterGstPlayer *player = CLUTTER_GST_PLAYER (data);
   ClutterGstPlayerPrivate *priv = PLAYER_GET_PRIVATE (player);
 
-  free_tags_list (&priv->subtitle_tracks);
-  priv->subtitle_tracks = get_tags (priv->pipeline, "n-text", "get-text-tags");
+  if (priv)
+    {
+      free_tags_list (&priv->subtitle_tracks);
+      priv->subtitle_tracks = get_tags (priv->pipeline, "n-text", "get-text-tags");
 
-  CLUTTER_GST_NOTE (AUDIO_STREAM, "subtitle-tracks changed");
+      CLUTTER_GST_NOTE (AUDIO_STREAM, "subtitle-tracks changed");
 
-  g_object_notify (G_OBJECT (player), "subtitle-tracks");
+      g_object_notify (G_OBJECT (player), "subtitle-tracks");
+    }
 
   g_object_unref (player);