[Bug 732203] h264parse: improve handling of byte-stream/au format

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=732203
  GStreamer | gst-plugins-bad | git

--- Comment #9 from Gwenole Beauchesne <gb.devel at gmail.com> 2014-06-26 07:51:15 UTC ---
Created an attachment (id=279297)
 View: https://bugzilla.gnome.org/attachment.cgi?id=279297
 Review: https://bugzilla.gnome.org/review?bug=732203&attachment=279297

h264parse: fix collection of access units to preserve config headers

Always use a GstAdapter when collecting access units (alignment="au") in either
byte-stream or avcC format. This is required to properly preserve config
headers like SPS and PPS when invalid or broken NAL units are subsequently
parsed.

More precisely, this fixes scenario like: [ <SPS> <PPS> <invalid-NAL> <slice> ]
where we used to reset the output frame buffer when an invalid or broken NAL is
parsed, i.e. SPS and PPS NAL units were lost, thus preventing the next slice
unit to be decoded, should this also represent any valid data.

This addresses comment #8

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