[Bug 690994] New: videodecoder: Allow parse function to not use all data on the adapter

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=690994
  GStreamer | gst-plugins-base | unspecified

           Summary: videodecoder: Allow parse function to not use all data
                    on the adapter
    Classification: Platform
           Product: GStreamer
           Version: unspecified
        OS/Version: Mac OS
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: thijsvermeir at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


When the decoder is accepting non-packetized data, it currently needs to
consume all data in the parse function. This is not useful/optimal if the parse
function is looking for packets over the border of different incoming buffers.

I propose to also allow exiting the parse loop if the parse function did not
consume any data from the adapter.

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