[Bug 670741] [0.11] basetransform: save downstream metadata supported APIs

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=670741
  GStreamer | gstreamer (core) | 0.11.x

Wim Taymans <wim.taymans> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |wim.taymans at gmail.com
         Resolution|                            |OBSOLETE

--- Comment #3 from Wim Taymans <wim.taymans at gmail.com> 2012-03-01 16:51:59 UTC ---
Solved in a more generic way now.
The metadata API is now registered with tags that describe what the metadata
refers to.
The downstream query is kept and passed to propose_allocation, this allows for
more things than just the metadata to be proxied (also the allocators, for
example).
The videoconvert element copies all metadata that is not dependent on the
colorspace. If no scaling is active, cropping info will therefore survive a
videoconvert ! videoscale chain.
Other videofilter elements will need similar support, we can't just always copy
all the metadata, it depends on what the filter does.

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