Documentation/userspace-api/media/v4l/pixfmt-y12i.rst

Source file repositories/reference/linux-study-clean/Documentation/userspace-api/media/v4l/pixfmt-y12i.rst

File Facts

System
Linux kernel
Corpus path
Documentation/userspace-api/media/v4l/pixfmt-y12i.rst
Extension
.rst
Size
927 bytes
Lines
38
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: documentation
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. c:namespace:: V4L

.. _V4L2-PIX-FMT-Y12I:

**************************
V4L2_PIX_FMT_Y12I ('Y12I')
**************************

Interleaved grey-scale image, e.g. from a stereo-pair


Description
===========

This is a grey-scale image with a depth of 12 bits per pixel, but with
pixels from 2 sources interleaved and bit-packed. Each pixel is stored
in a 24-bit word in the little-endian order. On a little-endian machine
these pixels can be deinterlaced using

.. code-block:: c

    __u8 *buf;
    left0 = 0xfff & *(__u16 *)buf;
    right0 = *(__u16 *)(buf + 1) >> 4;

**Bit-packed representation.**
pixels cross the byte boundary and have a ratio of 3 bytes for each
interleaved pixel.

.. flat-table::
    :header-rows:  0
    :stub-columns: 0

    * - Y'\ :sub:`0left[7:0]`
      - Y'\ :sub:`0right[3:0]`\ Y'\ :sub:`0left[11:8]`
      - Y'\ :sub:`0right[11:4]`

Annotation

Implementation Notes