libowl-av: Fix music player crash if adding unknown type files

Using bus message to call function flush_head/feed_head in main thread
to protect private data operation.

A better fix may be to listen to bus message "CODEC_NOT_FOUND" and
"MISSING_PLUGIN" directly to avoid hooking into "unknown-type" signal.
We will revisit it in next period.

This fixes [BUGID #296]

Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>

1 files changed, 40 insertions, 0 deletions

diff --git a/meta/recipes-sato/owl-video-widget/libowl-av/gst_change_state.patch b/meta/recipes-sato/owl-video-widget/libowl-av/gst_change_state.patch
new file mode 100644
index 000000000..cc095873f
--- /dev/null
+++ b/meta/recipes-sato/owl-video-widget/libowl-av/gst_change_state.patch
@@ -0,0 +1,40 @@
+Fix music player crash if adding unknown type files.
+
+Using bus message to call function flush_head/feed_head in main thread
+to protect private data operation.
+
+A better fix may be to listen to bus message "CODEC_NOT_FOUND" and
+"MISSING_PLUGIN" directly to avoid hooking into "unknown-type" signal.
+We will revisit it in next period.
+
+Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
+
+diff -ruN libowl-av-orig/libowl-av/owl-tag-reader.c libowl-av/libowl-av/owl-tag-reader.c
+--- libowl-av-orig/libowl-av/owl-tag-reader.c	2010-10-12 14:30:26.000000000 +0800
++++ libowl-av/libowl-av/owl-tag-reader.c	2010-10-12 14:32:39.000000000 +0800
+@@ -300,13 +300,23 @@
+                            GstCaps      *caps,
+                            OwlTagReader *tag_reader)
+ {
++        GstMessage *message;
++        GstBus *bus;
++
+         tag_reader->priv->current_error =
+                 g_error_new (OWL_TAG_READER_ERROR,
+                              OWL_TAG_READER_ERROR_UNKNOWN_TYPE,
+                              "Unknown type");
+ 
+-        flush_head (tag_reader);
+-        feed_head (tag_reader);
++        /**
++         * Post a message to the bus, as we are in another thread here.
++         **/
++        message = gst_message_new_error(GST_OBJECT (decodebin),
++                                        tag_reader->priv->current_error, NULL);
++
++        bus = gst_pipeline_get_bus (GST_PIPELINE (tag_reader->priv->pipeline));
++        gst_bus_post (bus, message);
++        gst_object_unref (GST_OBJECT (bus));
+ }
+ 
+ /**