From: Ezequiel Garcia <ezequiel@collabora.com>
To: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Jonas Karlman <jonas@kwiboo.se>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Hans Verkuil <hverkuil@xs4all.nl>,
Philipp Zabel <p.zabel@pengutronix.de>,
Paul Kocialkowski <paul.kocialkowski@bootlin.com>,
"linux-media@vger.kernel.org" <linux-media@vger.kernel.org>,
"linux-rockchip@lists.infradead.org"
<linux-rockchip@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [RFC 07/12] media: uapi: h264: Add DPB entry field reference flags
Date: Fri, 10 Jul 2020 08:50:28 -0300 [thread overview]
Message-ID: <6232d8475e169ee53b5864959af21d14bf0fc620.camel@collabora.com> (raw)
In-Reply-To: <20200710101333.05077f18@collabora.com>
On Fri, 2020-07-10 at 10:13 +0200, Boris Brezillon wrote:
> On Fri, 10 Jul 2020 01:21:07 -0300
> Ezequiel Garcia <ezequiel@collabora.com> wrote:
>
> > Hello Jonas,
> >
> > In the context of the uAPI cleanup,
> > I'm revisiting this patch.
> >
> > On Sun, 2019-09-01 at 12:45 +0000, Jonas Karlman wrote:
> > > Add DPB entry flags to help indicate when a reference frame is a field picture
> > > and how the DPB entry is referenced, top or bottom field or full frame.
> > >
> > > Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
> > > ---
> > > Documentation/media/uapi/v4l/ext-ctrls-codec.rst | 12 ++++++++++++
> > > include/media/h264-ctrls.h | 4 ++++
> > > 2 files changed, 16 insertions(+)
> > >
> > > diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
> > > index bc5dd8e76567..eb6c32668ad7 100644
> > > --- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
> > > +++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
> > > @@ -2022,6 +2022,18 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
> > > * - ``V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM``
> > > - 0x00000004
> > > - The DPB entry is a long term reference frame
> > > + * - ``V4L2_H264_DPB_ENTRY_FLAG_FIELD_PICTURE``
> > > + - 0x00000008
> > > + - The DPB entry is a field picture
> > > + * - ``V4L2_H264_DPB_ENTRY_FLAG_REF_TOP``
> > > + - 0x00000010
> > > + - The DPB entry is a top field reference
> > > + * - ``V4L2_H264_DPB_ENTRY_FLAG_REF_BOTTOM``
> > > + - 0x00000020
> > > + - The DPB entry is a bottom field reference
> > > + * - ``V4L2_H264_DPB_ENTRY_FLAG_REF_FRAME``
> > > + - 0x00000030
> > > + - The DPB entry is a reference frame
> > >
> > > ``V4L2_CID_MPEG_VIDEO_H264_DECODE_MODE (enum)``
> > > Specifies the decoding mode to use. Currently exposes slice-based and
> > > diff --git a/include/media/h264-ctrls.h b/include/media/h264-ctrls.h
> > > index e877bf1d537c..76020ebd1e6c 100644
> > > --- a/include/media/h264-ctrls.h
> > > +++ b/include/media/h264-ctrls.h
> > > @@ -185,6 +185,10 @@ struct v4l2_ctrl_h264_slice_params {
> > > #define V4L2_H264_DPB_ENTRY_FLAG_VALID 0x01
> > > #define V4L2_H264_DPB_ENTRY_FLAG_ACTIVE 0x02
> > > #define V4L2_H264_DPB_ENTRY_FLAG_LONG_TERM 0x04
> > > +#define V4L2_H264_DPB_ENTRY_FLAG_FIELD_PICTURE 0x08
> > > +#define V4L2_H264_DPB_ENTRY_FLAG_REF_TOP 0x10
> > > +#define V4L2_H264_DPB_ENTRY_FLAG_REF_BOTTOM 0x20
> > > +#define V4L2_H264_DPB_ENTRY_FLAG_REF_FRAME 0x30
> > >
> >
> > I've been going thru the H264 spec and I'm unsure,
> > are all these flags semantically needed?
> >
> > For instance, if one of REF_BOTTOM or REF_TOP (or both)
> > are set, doesn't that indicate it's a field picture?
> >
> > Or conversely, if neither REF_BOTTOM or REF_TOP are set,
> > then it's a frame picture?
>
> I think that's what I was trying to do here [1]
>
> [1]https://patchwork.kernel.org/patch/11392095/
Right. Aren't we missing a DPB_ENTRY_FLAG_TOP_FIELD?
If I understand correctly, the DPB can contain:
* frames (FLAG_FIELD not set)
* a field pair, with a single field (FLAG_FIELD and either TOP or BOTTOM).
* a field pair, with boths fields (FLAG_FIELD and both TOP or BOTTOM).
Ezequiel
next prev parent reply other threads:[~2020-07-10 11:50 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-01 12:42 [PATCH RFC 00/12] media: hantro: H264 fixes and improvements Jonas Karlman
2019-09-01 12:45 ` [PATCH 01/12] media: hantro: Fix H264 max frmsize supported on RK3288 Jonas Karlman
2019-09-04 13:07 ` Ezequiel Garcia
2019-09-09 19:25 ` Jonas Karlman
[not found] ` <20190901124531.23645-1-jonas@kwiboo.se>
2019-09-01 12:45 ` [PATCH 02/12] media: hantro: Do not reorder H264 scaling list Jonas Karlman
2019-09-02 14:00 ` Philipp Zabel
2019-09-02 16:18 ` Jonas Karlman
2019-09-03 7:54 ` Jonas Karlman
2019-09-03 12:53 ` Philipp Zabel
2019-09-03 9:56 ` Philipp Zabel
2019-09-10 10:14 ` Ezequiel Garcia
2019-09-01 12:45 ` [PATCH 03/12] media: hantro: Fix H264 motion vector buffer offset Jonas Karlman
2019-09-03 10:58 ` Philipp Zabel
2019-09-03 20:13 ` Jonas Karlman
2019-09-10 10:18 ` Ezequiel Garcia
2019-09-10 11:34 ` Ezequiel Garcia
2019-09-01 12:45 ` [PATCH 05/12] media: hantro: Remove now unused H264 pic_size Jonas Karlman
2019-09-01 12:45 ` [PATCH 04/12] media: hantro: Reduce H264 extra space for motion vectors Jonas Karlman
2019-09-01 12:45 ` [PATCH 06/12] media: hantro: Set H264 FIELDPIC_FLAG_E flag correctly Jonas Karlman
2019-09-01 12:45 ` [RFC 08/12] media: hantro: Fix H264 decoding of field encoded content Jonas Karlman
2019-09-03 13:21 ` Philipp Zabel
2019-09-03 14:02 ` Jonas Karlman
2019-09-03 15:01 ` Philipp Zabel
2019-09-03 19:47 ` Jonas Karlman
2019-09-01 12:45 ` [RFC 07/12] media: uapi: h264: Add DPB entry field reference flags Jonas Karlman
2020-07-10 4:21 ` Ezequiel Garcia
2020-07-10 8:13 ` Boris Brezillon
2020-07-10 8:48 ` Jonas Karlman
2020-07-10 12:18 ` Ezequiel Garcia
2020-07-10 11:50 ` Ezequiel Garcia [this message]
2020-07-10 12:05 ` Boris Brezillon
2020-07-10 12:25 ` Ezequiel Garcia
2020-07-10 21:49 ` Nicolas Dufresne
2020-07-11 10:21 ` Jonas Karlman
2020-07-11 18:36 ` Nicolas Dufresne
2020-07-12 22:59 ` Ezequiel Garcia
2020-07-14 16:04 ` Nicolas Dufresne
2019-09-01 12:45 ` [RFC 09/12] media: hantro: Refactor G1 H264 code Jonas Karlman
2019-09-01 12:45 ` [RFC 10/12] media: hantro: Add support for H264 decoding on RK3399 Jonas Karlman
2019-09-02 11:46 ` Hans Verkuil
2019-09-02 15:25 ` Jonas Karlman
2019-09-01 12:45 ` [RFC 11/12] media: hantro: Enable " Jonas Karlman
2019-09-01 12:45 ` [RFC 12/12] media: hantro: Enable H264 decoding on RK3328 Jonas Karlman
2019-09-02 13:02 ` [PATCH RFC 00/12] media: hantro: H264 fixes and improvements Ezequiel Garcia
2019-09-02 16:28 ` Jonas Karlman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=6232d8475e169ee53b5864959af21d14bf0fc620.camel@collabora.com \
--to=ezequiel@collabora.com \
--cc=boris.brezillon@collabora.com \
--cc=hverkuil@xs4all.nl \
--cc=jonas@kwiboo.se \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=linux-rockchip@lists.infradead.org \
--cc=mchehab@kernel.org \
--cc=p.zabel@pengutronix.de \
--cc=paul.kocialkowski@bootlin.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).