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    SubjectRe: [PATCH 1/2] media: docs-rst: Document memory-to-memory video decoder interface
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    On Tue, 2018-07-24 at 23:06 +0900, Tomasz Figa wrote:
    [...]
    > +Seek
    > +====
    > +
    > +Seek is controlled by the ``OUTPUT`` queue, as it is the source of
    > +bitstream data. ``CAPTURE`` queue remains unchanged/unaffected.
    > +
    > +1. Stop the ``OUTPUT`` queue to begin the seek sequence via
    > + :c:func:`VIDIOC_STREAMOFF`.
    > +
    > + * **Required fields:**
    > +
    > + ``type``
    > + a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``
    > +
    > + * The driver must drop all the pending ``OUTPUT`` buffers and they are
    > + treated as returned to the client (following standard semantics).
    > +
    > +2. Restart the ``OUTPUT`` queue via :c:func:`VIDIOC_STREAMON`
    > +
    > + * **Required fields:**
    > +
    > + ``type``
    > + a ``V4L2_BUF_TYPE_*`` enum appropriate for ``OUTPUT``
    > +
    > + * The driver must be put in a state after seek and be ready to
    > + accept new source bitstream buffers.
    > +
    > +3. Start queuing buffers to ``OUTPUT`` queue containing stream data after
    > + the seek until a suitable resume point is found.
    > +
    > + .. note::
    > +
    > + There is no requirement to begin queuing stream starting exactly from
    > + a resume point (e.g. SPS or a keyframe). The driver must handle any
    > + data queued and must keep processing the queued buffers until it
    > + finds a suitable resume point. While looking for a resume point, the

    I think the definition of a resume point is too vague in this place.
    Can the driver decide whether or not a keyframe without SPS is a
    suitable resume point? Or do drivers have to parse and store SPS/PPS if
    the hardware does not support resuming from a keyframe without sending
    SPS/PPS again?

    regards
    Philipp

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