From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: linux-media@vger.kernel.org
Cc: Sakari Ailus <sakari.ailus@linux.intel.com>,
Hans Verkuil <hverkuil-cisco@xs4all.nl>,
Dylan Yip <dylany@xilinx.com>, Vishal Sagar <vsagar@xilinx.com>,
Nicolas Dufresne <nicolas@ndufresne.ca>
Subject: [PATCH v2 11/19] media: doc: pixfmt-packed-yuv: Clarify naming scheme for 4:4:4 formats
Date: Tue, 3 Nov 2020 00:40:54 +0200 [thread overview]
Message-ID: <20201102224102.30292-12-laurent.pinchart@ideasonboard.com> (raw)
In-Reply-To: <20201102224102.30292-1-laurent.pinchart@ideasonboard.com>
Document the naming scheme for the existing packed YUV 4:4:4 formats, as
previously done for the RGB formats.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
.../userspace-api/media/v4l/pixfmt-packed-yuv.rst | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/Documentation/userspace-api/media/v4l/pixfmt-packed-yuv.rst b/Documentation/userspace-api/media/v4l/pixfmt-packed-yuv.rst
index 3792035b4604..8f0f1405bfe3 100644
--- a/Documentation/userspace-api/media/v4l/pixfmt-packed-yuv.rst
+++ b/Documentation/userspace-api/media/v4l/pixfmt-packed-yuv.rst
@@ -25,6 +25,14 @@ components and thus differ in how they interlave the three components.
These formats do not subsample the chroma components and store each pixels as a
full triplet of Y, Cb and Cr values.
+The next table lists the packed YUV 4:4:4 formats with less than 8 bits per
+component. They are named based on the order of the Y, Cb and Cr components as
+seen in a 16-bit word, which is then stored in memory in little endian byte
+order, and on the number of bits for each component. For instance the YUV565
+format stores a pixel in a 16-bit word [15:0] laid out at as [Y'\ :sub:`4-0`
+Cb\ :sub:`5-0` Cr\ :sub:`4-0`], and stored in memory in two bytes,
+[Cb\ :sub:`2-0` Cr\ :sub:`4-0`] followed by [Y'\ :sub:`4-0` Cb\ :sub:`5-3`].
+
.. raw:: latex
\begingroup
@@ -145,6 +153,12 @@ full triplet of Y, Cb and Cr values.
<overlay>` or :ref:`Video Output Overlay <osd>`.
+The next table lists the packed YUV 4:4:4 formats with 8 bits per component.
+They are named based on the order of the Y, Cb and Cr components as stored in
+memory, and on the total number of bits per pixel. For instance, the VUYX32
+format stores a pixel with Cr\ :sub:`7-0` in the first byte, Cb\ :sub:`7-0` in
+the second byte and Y'\ :sub:`7-0` in the third byte.
+
.. flat-table:: Packed YUV Image Formats (8bpc)
:header-rows: 1
:stub-columns: 0
--
Regards,
Laurent Pinchart
next prev parent reply other threads:[~2020-11-02 22:42 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-02 22:40 [PATCH v2 00/19] media: Add new pixel formats for Xilinx v-frmbuf Laurent Pinchart
2020-11-02 22:40 ` [PATCH v2 01/19] media: videodev2.h: Remove unneeded comment about 4CC value Laurent Pinchart
2020-11-02 22:40 ` [PATCH v2 02/19] media: videodev2.h: Move HI240 format to vendor-specific section Laurent Pinchart
2020-11-02 22:40 ` [PATCH v2 03/19] media: videodev2.h: Move HM12 format to YUV semi-planar section Laurent Pinchart
2020-11-02 22:40 ` [PATCH v2 04/19] media: doc: pixfmt-rgb: Remove layout table for packed RGB formats Laurent Pinchart
2020-11-02 22:40 ` [PATCH v2 05/19] media: doc: pixfmt-rgb: Add title for deprecated formats Laurent Pinchart
2020-11-02 22:40 ` [PATCH v2 06/19] media: doc: pixfmt-rgb: Clarify naming scheme for RGB formats Laurent Pinchart
2020-11-16 11:51 ` Hans Verkuil
2020-11-16 11:58 ` Hans Verkuil
2020-11-16 17:29 ` Laurent Pinchart
2020-11-16 17:26 ` Laurent Pinchart
2020-11-16 17:35 ` Laurent Pinchart
2020-11-16 18:20 ` Hans Verkuil
2020-11-02 22:40 ` [PATCH v2 07/19] media: doc: pixfmt-yuv: Document subsampling in more details Laurent Pinchart
2020-11-02 22:40 ` [PATCH v2 08/19] media: doc: pixfmt-yuv: Move all packed YUV formats to common file Laurent Pinchart
2020-11-02 22:40 ` [PATCH v2 09/19] media: doc: pixfmt-packed-yuv: Fill padding bits with '-' Laurent Pinchart
2020-11-02 22:40 ` [PATCH v2 10/19] media: doc: pixfmt-packed-yuv: Express 4:4:4 formats in a more compact way Laurent Pinchart
2020-11-02 22:40 ` Laurent Pinchart [this message]
2020-11-02 22:40 ` [PATCH v2 12/19] media: doc: pixfmt-yuv: Move all luma-only YUV formats to common file Laurent Pinchart
2020-11-03 12:05 ` Sakari Ailus
2020-11-02 22:40 ` [PATCH v2 13/19] media: doc: pixfmt-yuv: Move all semi-planar " Laurent Pinchart
2020-11-02 22:40 ` [PATCH v2 14/19] media: doc: pixfmt-yuv: Move all planar " Laurent Pinchart
2020-11-02 22:40 ` [PATCH v2 15/19] media: v4l2: Add 10-, 12- and 16-bpc BGR formats Laurent Pinchart
2020-11-16 12:03 ` Hans Verkuil
2020-11-16 18:10 ` Laurent Pinchart
2020-11-02 22:40 ` [PATCH v2 16/19] media: v4l2: Add a few missing packed YUV 4:4:4 formats Laurent Pinchart
2020-11-16 12:25 ` Hans Verkuil
2020-11-02 22:41 ` [PATCH v2 17/19] media: v4l2: Add 10-, 12- and 16-bpc 4:4:4 packed VUY formats Laurent Pinchart
2020-11-02 22:41 ` [PATCH v2 18/19] media: v4l2: Add 10- and 12-bpc luma-only formats with linear packing Laurent Pinchart
2020-11-02 22:41 ` [PATCH v2 19/19] media: v4l2: Add 10-, 12- and 16-bpc 4:2:0 and 4:2:2 semi-planar YUV formats Laurent Pinchart
2020-11-16 12:10 ` Hans Verkuil
2020-11-16 12:17 ` Hans Verkuil
2020-11-16 18:41 ` Laurent Pinchart
2020-11-03 8:57 ` [PATCH v2 00/19] media: Add new pixel formats for Xilinx v-frmbuf Sakari Ailus
2020-11-03 10:25 ` Laurent Pinchart
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