v4l2src: clear format list in READY->NULL

Clear format list and probed caps when going to NULL so if a new device
is set we'll probe the formats again instead of using previously
detected ones. Fixes bug #591747.

2 files changed, 9 insertions, 0 deletions

diff --git a/sys/v4l2/gstv4l2object.c b/sys/v4l2/gstv4l2object.c
index ce6f7c9a..f73ce218 100644
--- a/sys/v4l2/gstv4l2object.c
+++ b/sys/v4l2/gstv4l2object.c
@@ -604,6 +604,10 @@ gst_v4l2_object_stop (GstV4l2Object * v4l2object)
   if (!gst_v4l2_close (v4l2object))
     return FALSE;
 
+  if (v4l2object->formats) {
+    gst_v4l2_object_clear_format_list (v4l2object);
+  }
+
   return TRUE;
 }
 
diff --git a/sys/v4l2/gstv4l2src.c b/sys/v4l2/gstv4l2src.c
index f0400518..2f0fef9e 100644
--- a/sys/v4l2/gstv4l2src.c
+++ b/sys/v4l2/gstv4l2src.c
@@ -760,6 +760,11 @@ gst_v4l2src_change_state (GstElement * element, GstStateChange transition)
       /* close the device */
       if (!gst_v4l2_object_stop (v4l2src->v4l2object))
         return GST_STATE_CHANGE_FAILURE;
+
+      if (v4l2src->probed_caps) {
+        gst_caps_unref (v4l2src->probed_caps);
+        v4l2src->probed_caps = NULL;
+      }
       break;
     default:
       break;