[Bug 733614] Zero copy path between omxvideodec and v4l2sink

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=733614
  GStreamer | gst-omx | git

--- Comment #21 from Julien Isorce <julien.isorce at gmail.com> 2014-09-05 19:53:10 UTC ---
Why not set io-mode to 2 (i.e mmap) and tell omx to use those buffers (i.e
OMX_UseBuffer) ?

For a start you can have a look at
http://cgit.collabora.com/git/raspberry-pi/gst-omx.git/log/?h=rpi-1.0.0.1 

The commit named "omxvideodec: integrate resize component on RPI" adds support
for OMX_UseBuffer.
Well this commit also adds support for the broadcom resize component, which you
does not need here. I should have split it into at least 2 patches.

This way it was possible to tell OMX to use the XShmImage(s) allocated by the
downstream ximagesink's bufferpool.

This is similar to OMX_UseEGLImage btw.

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