[Bug 733864] v4l2videodec: Implement EOS handling through V4L2_DEC_CMD_STOP

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=733864
  GStreamer | gst-plugins-good | git

Peter Seiderer <ps.report> changed:

           What    |Removed                     |Added
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                 CC|                            |ps.report at gmx.net

--- Comment #2 from Peter Seiderer <ps.report at gmx.net> 2014-12-19 21:01:13 UTC ---
Here a first draft patchset to add V4L2_ENC_CMD_STOP/V4L2_DEC_CMD_STOP
support to the v4l2 gstreamer elements (as suggested on [1]), against
gstreamer-1.4.4 with patches for v4l2encoder applied (see [2]):

0001-v4l2_calls-add-gst_v4l2_encoder_cmd-and-gst_v4l2_dec.patch
0002-v4l2videoenc-send-V4L2_ENC_CMD_STOP-instead-of-empty.patch
0003-v4l2videodec-send-V4L2_DEC_CMD_STOP-instead-of-empty.patch
0004-gstv4l2bufferpool-gstv4l2videodec-add-last-buffer-eo.patch

Patch 1 to 3 are straight forward, patch 4 very preliminary as
it depends on adding the V4L2_BUF_FLAG_LAST flag to the linux
kernel, see 0001-coda-mark-last-buffer.patch for adding it
to the coda driver for testing. The patch re-enables the
queueing of empty buffers to trigger the code driver
(without this the code in coda_dqbuf() is never reached).

With this patches applied a decoding pipeline with
gstreamer-1.4.4 on i.mx6 stops with correct EOS handling.

Regards,
Peter

[1] http://www.spinics.net/lists/linux-media/msg84390.html
[2] https://bugzilla.gnome.org/show_bug.cgi?id=728438

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