Linux-Media Archive on lore.kernel.org
 help / Atom feed
From: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
To: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
	devel@driverdev.osuosl.org, linux-arm-kernel@lists.infradead.org,
	linux-sunxi@googlegroups.com
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>,
	Maxime Ripard <maxime.ripard@bootlin.com>,
	Paul Kocialkowski <paul.kocialkowski@bootlin.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Chen-Yu Tsai <wens@csie.org>,
	Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
	Hans Verkuil <hverkuil@xs4all.nl>,
	Ezequiel Garcia <ezequiel@collabora.com>,
	Tomasz Figa <tfiga@chromium.org>,
	Alexandre Courbot <acourbot@chromium.org>,
	Nicolas Dufresne <nicolas@ndufresne.ca>,
	Boris Brezillon <boris.brezillon@collabora.com>,
	Jernej Skrabec <jernej.skrabec@siol.net>,
	Jonas Karlman <jonas@kwiboo.se>
Subject: [PATCH v6 4/5] media: pixfmt: Document the HEVC slice pixel format
Date: Fri, 14 Jun 2019 16:38:36 +0200
Message-ID: <20190614143837.15605-5-paul.kocialkowski@bootlin.com> (raw)
In-Reply-To: <20190614143837.15605-1-paul.kocialkowski@bootlin.com>

Document the current state of the HEVC slice pixel format.
The format will need to evolve in the future, which is why it is
not part of the public API.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
---
 .../media/uapi/v4l/pixfmt-compressed.rst      | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/Documentation/media/uapi/v4l/pixfmt-compressed.rst b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
index 4b701fc7653e..fbe1b42c20f1 100644
--- a/Documentation/media/uapi/v4l/pixfmt-compressed.rst
+++ b/Documentation/media/uapi/v4l/pixfmt-compressed.rst
@@ -143,6 +143,27 @@ Compressed Formats
       - ``V4L2_PIX_FMT_HEVC``
       - 'HEVC'
       - HEVC/H.265 video elementary stream.
+    * .. _V4L2-PIX-FMT-HEVC-SLICE:
+
+      - ``V4L2_PIX_FMT_HEVC_SLICE``
+      - 'S265'
+      - HEVC parsed slice data, as extracted from the HEVC bitstream.
+	This format is adapted for stateless video decoders that implement a
+	HEVC pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`).
+	Metadata associated with the frame to decode is required to be passed
+	through the following controls :
+        * ``V4L2_CID_MPEG_VIDEO_HEVC_SPS``
+        * ``V4L2_CID_MPEG_VIDEO_HEVC_PPS``
+        * ``V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS``
+	See the :ref:`associated Codec Control IDs <v4l2-mpeg-hevc>`.
+	Buffers associated with this pixel format must contain the appropriate
+	number of macroblocks to decode a full corresponding frame.
+
+	.. note::
+
+	   This format is not yet part of the public kernel API and it
+	   is expected to change.
+
     * .. _V4L2-PIX-FMT-FWHT:
 
       - ``V4L2_PIX_FMT_FWHT``
-- 
2.21.0


  parent reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-14 14:38 [PATCH v6 0/5] HEVC/H.265 stateless support for V4L2 and Cedrus Paul Kocialkowski
2019-06-14 14:38 ` [PATCH v6 1/5] media: v4l2-ctrls: Split off MPEG-2 controls validation Paul Kocialkowski
2019-06-14 14:38 ` [PATCH v6 2/5] media: v4l2-ctrls: Split off MPEG-2 controls initialization Paul Kocialkowski
2019-06-14 14:38 ` [PATCH v6 3/5] media: v4l: Add definitions for the HEVC slice controls Paul Kocialkowski
2019-06-14 14:38 ` Paul Kocialkowski [this message]
2019-06-14 14:38 ` [PATCH v6 5/5] media: cedrus: Add HEVC/H.265 decoding support Paul Kocialkowski

Reply instructions:

You may reply publically 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=20190614143837.15605-5-paul.kocialkowski@bootlin.com \
    --to=paul.kocialkowski@bootlin.com \
    --cc=acourbot@chromium.org \
    --cc=boris.brezillon@collabora.com \
    --cc=devel@driverdev.osuosl.org \
    --cc=ezequiel@collabora.com \
    --cc=gregkh@linuxfoundation.org \
    --cc=hverkuil@xs4all.nl \
    --cc=jernej.skrabec@siol.net \
    --cc=jonas@kwiboo.se \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-media@vger.kernel.org \
    --cc=linux-sunxi@googlegroups.com \
    --cc=maxime.ripard@bootlin.com \
    --cc=mchehab@kernel.org \
    --cc=nicolas@ndufresne.ca \
    --cc=tfiga@chromium.org \
    --cc=thomas.petazzoni@bootlin.com \
    --cc=wens@csie.org \
    /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

Linux-Media Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-media/0 linux-media/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-media linux-media/ https://lore.kernel.org/linux-media \
		linux-media@vger.kernel.org linux-media@archiver.kernel.org
	public-inbox-index linux-media


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-media


AGPL code for this site: git clone https://public-inbox.org/ public-inbox