projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 5377d91f MH |
1 | .. -*- coding: utf-8; mode: rst -*- |
| 2 | ||
| 3 | .. _V4L2-PIX-FMT-Y12I: | |
| 4 | ||
| 5 | ************************** | |
| 6 | V4L2_PIX_FMT_Y12I ('Y12I') | |
| 7 | ************************** | |
| 8 | ||
| 9 | *man V4L2_PIX_FMT_Y12I(2)* | |
| 10 | ||
| 11 | Interleaved grey-scale image, e.g. from a stereo-pair | |
| 12 | ||
| 13 | ||
| 14 | Description | |
| 15 | =========== | |
| 16 | ||
| 17 | This is a grey-scale image with a depth of 12 bits per pixel, but with | |
| 18 | pixels from 2 sources interleaved and bit-packed. Each pixel is stored | |
| 19 | in a 24-bit word in the little-endian order. On a little-endian machine | |
| 20 | these pixels can be deinterlaced using | |
| 21 | ||
| 5377d91f MH |
22 | .. code-block:: c |
| 23 | ||
| 24 | __u8 *buf; | |
| 25 | left0 = 0xfff & *(__u16 *)buf; | |
| 26 | right0 = *(__u16 *)(buf + 1) >> 4; | |
| 27 | ||
| 28 | **Bit-packed representation.** | |
| 5377d91f MH |
29 | pixels cross the byte boundary and have a ratio of 3 bytes for each |
| 30 | interleaved pixel. | |
| 31 | ||
| 5377d91f MH |
32 | .. flat-table:: |
| 33 | :header-rows: 0 | |
| 34 | :stub-columns: 0 | |
| 35 | :widths: 2 1 1 | |
| 36 | ||
| 37 | ||
| 38 | - .. row 1 | |
| 39 | ||
| 40 | - Y'\ :sub:`0left[7:0]` | |
| 41 | ||
| 42 | - Y'\ :sub:`0right[3:0]`\ Y'\ :sub:`0left[11:8]` | |
| 43 | ||
| 44 | - Y'\ :sub:`0right[11:4]` |