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From:   Tomasz Figa <tfiga@chromium.org>
Date:   Thu, 14 Mar 2019 13:13:33 +0900
Message-ID: <CAAFQd5BeiGVvDcZTFVYg_Qbw1NxRcWFybW2FcDGE=ohFWHFbYA@mail.gmail.com>
Subject: Re: [PATCH v5 1/2] media: uapi: Add H264 low-level decoder API
 compound controls.
To:     Maxime Ripard <maxime.ripard@bootlin.com>
Cc:     Hans Verkuil <hans.verkuil@cisco.com>,
        Alexandre Courbot <acourbot@chromium.org>,
        Sakari Ailus <sakari.ailus@linux.intel.com>,
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        Paul Kocialkowski <paul.kocialkowski@bootlin.com>,
        Chen-Yu Tsai <wens@csie.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
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On Thu, Mar 14, 2019 at 12:31 AM Maxime Ripard
<maxime.ripard@bootlin.com> wrote:
>
> Hi Tomasz,
>
> On Fri, Mar 08, 2019 at 03:12:18PM +0900, Tomasz Figa wrote:
> > > +.. _v4l2-mpeg-h264:
> > > +
> > > +``V4L2_CID_MPEG_VIDEO_H264_SPS (struct)``
> > > +    Specifies the sequence parameter set (as extracted from the
> > > +    bitstream) for the associated H264 slice data. This includes the
> > > +    necessary parameters for configuring a stateless hardware decoding
> > > +    pipeline for H264.  The bitstream parameters are defined according
> > > +    to :ref:`h264`. Unless there's a specific comment, refer to the
> > > +    specification for the documentation of these fields, section 7.4.2.1.1
> > > +    "Sequence Parameter Set Data Semantics".
> >
> > I don't see this section being added by this patch. Where does it come from?
>
> This is referring to the the H264 spec itself, as I was trying to
> point out with the reference in that paragraph. How would you write
> this down to make it more obvious?
>

Aha, somehow it didn't come to my mind when reading it. How about
something like below?

Unless there is a specific comment, refer to the ITU-T Rec. H.264
specification, section "7.4.2.1.1 Sequence parameter set data semantics"
(as of the 04/2017 edition).

Best regards,
Tomasz