linux/Documentation/userspace-api/media/v4l/pixfmt-cnf4.rst
Mauro Carvalho Chehab 54f38fcae5 media: docs: move uAPI book to userspace-api/media
Since 2017, there is an space reserved for userspace API,
created by changeset 1d596dee38 ("docs: Create a user-space API guide").

As the media subsystem was one of the first subsystems to use
Sphinx, until this patch, we were keeping things on a separate
place.

Let's just use the new location, as having all uAPI altogether
will likely make things easier for developers.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
2020-04-14 10:31:49 +02:00

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.. -*- coding: utf-8; mode: rst -*-
.. _V4L2-PIX-FMT-CNF4:
******************************
V4L2_PIX_FMT_CNF4 ('CNF4')
******************************
Depth sensor confidence information as a 4 bits per pixel packed array
Description
===========
Proprietary format used by Intel RealSense Depth cameras containing depth
confidence information in range 0-15 with 0 indicating that the sensor was
unable to resolve any signal and 15 indicating maximum level of confidence for
the specific sensor (actual error margins might change from sensor to sensor).
Every two consecutive pixels are packed into a single byte.
Bits 0-3 of byte n refer to confidence value of depth pixel 2*n,
bits 4-7 to confidence value of depth pixel 2*n+1.
**Bit-packed representation.**
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 64 64
* - Y'\ :sub:`01[3:0]`\ (bits 7--4) Y'\ :sub:`00[3:0]`\ (bits 3--0)
- Y'\ :sub:`03[3:0]`\ (bits 7--4) Y'\ :sub:`02[3:0]`\ (bits 3--0)