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Bug 748119 - GstMetaTransformFunction returns gboolean but its retval is discarded
GstMetaTransformFunction returns gboolean but its retval is discarded
Product: GStreamer
Classification: Platform
Component: gstreamer (core)
git master
Other Mac OS
: Normal normal
: 1.5.1
Assigned To: GStreamer Maintainers
GStreamer Maintainers
Depends on:
Reported: 2015-04-18 21:14 UTC by Ilya Konstantinov
Modified: 2015-04-20 07:22 UTC
See Also:
GNOME target: ---
GNOME version: ---

Description Ilya Konstantinov 2015-04-18 21:14:52 UTC
In gstmeta.h:

 * Returns: %TRUE if the transform could be performed
typedef gboolean (*GstMetaTransformFunction) (GstBuffer *transbuf,
                                              GstMeta *meta, GstBuffer *buffer,
                                              GQuark type, gpointer data);

However, in gstbuffer.c:

  if (flags & GST_BUFFER_COPY_META) {
      if (info->transform_func) {
        info->transform_func (dest, meta, src,
            _gst_meta_transform_copy, &copy_data); // <-- retval unused
Comment 1 Sebastian Dröge (slomo) 2015-04-20 07:22:22 UTC
More than this shouldn't be needed here. If it fails, the meta is just not copied.

commit a5ab02733a614a258e0effcdeb91968f4795cb7b
Author: Sebastian Dröge <>
Date:   Mon Apr 20 09:23:43 2015 +0200

    buffer: Check return value of meta transform function in gst_buffer_copy_into()
    ... by printing some debug output whenever copying a GstMeta fails.