1 .. SPDX-License-Identifier: GFDL-1.1-no-invari 1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
2 2
3 .. _V4L2-PIX-FMT-Y12I: 3 .. _V4L2-PIX-FMT-Y12I:
4 4
5 ************************** 5 **************************
6 V4L2_PIX_FMT_Y12I ('Y12I') 6 V4L2_PIX_FMT_Y12I ('Y12I')
7 ************************** 7 **************************
8 8
9 Interleaved grey-scale image, e.g. from a ster 9 Interleaved grey-scale image, e.g. from a stereo-pair
10 10
11 11
12 Description 12 Description
13 =========== 13 ===========
14 14
15 This is a grey-scale image with a depth of 12 15 This is a grey-scale image with a depth of 12 bits per pixel, but with
16 pixels from 2 sources interleaved and bit-pack 16 pixels from 2 sources interleaved and bit-packed. Each pixel is stored
17 in a 24-bit word in the little-endian order. O 17 in a 24-bit word in the little-endian order. On a little-endian machine
18 these pixels can be deinterlaced using 18 these pixels can be deinterlaced using
19 19
20 .. code-block:: c 20 .. code-block:: c
21 21
22 __u8 *buf; 22 __u8 *buf;
23 left0 = 0xfff & *(__u16 *)buf; 23 left0 = 0xfff & *(__u16 *)buf;
24 right0 = *(__u16 *)(buf + 1) >> 4; 24 right0 = *(__u16 *)(buf + 1) >> 4;
25 25
26 **Bit-packed representation.** 26 **Bit-packed representation.**
27 pixels cross the byte boundary and have a rati 27 pixels cross the byte boundary and have a ratio of 3 bytes for each
28 interleaved pixel. 28 interleaved pixel.
29 29
30 .. flat-table:: 30 .. flat-table::
31 :header-rows: 0 31 :header-rows: 0
32 :stub-columns: 0 32 :stub-columns: 0
33 33
34 * - Y'\ :sub:`0left[7:0]` 34 * - Y'\ :sub:`0left[7:0]`
35 - Y'\ :sub:`0right[3:0]`\ Y'\ :sub:`0lef 35 - Y'\ :sub:`0right[3:0]`\ Y'\ :sub:`0left[11:8]`
36 - Y'\ :sub:`0right[11:4]` 36 - Y'\ :sub:`0right[11:4]`
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