| .. -*- coding: utf-8; mode: rst -*- |
| |
| .. _V4L2-PIX-FMT-NV16: |
| |
| ****************************************************** |
| V4L2_PIX_FMT_NV16 ('NV16'), V4L2_PIX_FMT_NV61 ('NV61') |
| ****************************************************** |
| |
| *man V4L2_PIX_FMT_NV16(2)* |
| |
| V4L2_PIX_FMT_NV61 |
| Formats with ½ horizontal chroma resolution, also known as YUV 4:2:2. |
| One luminance and one chrominance plane with alternating chroma samples |
| as opposed to ``V4L2_PIX_FMT_YVU420`` |
| |
| |
| Description |
| =========== |
| |
| These are two-plane versions of the YUV 4:2:2 format. The three |
| components are separated into two sub-images or planes. The Y plane is |
| first. The Y plane has one byte per pixel. For ``V4L2_PIX_FMT_NV16``, a |
| combined CbCr plane immediately follows the Y plane in memory. The CbCr |
| plane is the same width and height, in bytes, as the Y plane (and of the |
| image). Each CbCr pair belongs to two pixels. For example, |
| Cb\ :sub:`0`/Cr:sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`. |
| ``V4L2_PIX_FMT_NV61`` is the same except the Cb and Cr bytes are |
| swapped, the CrCb plane starts with a Cr byte. |
| |
| If the Y plane has pad bytes after each row, then the CbCr plane has as |
| many pad bytes after its rows. |
| |
| **Byte Order..** |
| |
| Each cell is one byte. |
| |
| |
| |
| .. flat-table:: |
| :header-rows: 0 |
| :stub-columns: 0 |
| :widths: 2 1 1 1 1 |
| |
| |
| - .. row 1 |
| |
| - start + 0: |
| |
| - Y'\ :sub:`00` |
| |
| - Y'\ :sub:`01` |
| |
| - Y'\ :sub:`02` |
| |
| - Y'\ :sub:`03` |
| |
| - .. row 2 |
| |
| - start + 4: |
| |
| - Y'\ :sub:`10` |
| |
| - Y'\ :sub:`11` |
| |
| - Y'\ :sub:`12` |
| |
| - Y'\ :sub:`13` |
| |
| - .. row 3 |
| |
| - start + 8: |
| |
| - Y'\ :sub:`20` |
| |
| - Y'\ :sub:`21` |
| |
| - Y'\ :sub:`22` |
| |
| - Y'\ :sub:`23` |
| |
| - .. row 4 |
| |
| - start + 12: |
| |
| - Y'\ :sub:`30` |
| |
| - Y'\ :sub:`31` |
| |
| - Y'\ :sub:`32` |
| |
| - Y'\ :sub:`33` |
| |
| - .. row 5 |
| |
| - start + 16: |
| |
| - Cb\ :sub:`00` |
| |
| - Cr\ :sub:`00` |
| |
| - Cb\ :sub:`01` |
| |
| - Cr\ :sub:`01` |
| |
| - .. row 6 |
| |
| - start + 20: |
| |
| - Cb\ :sub:`10` |
| |
| - Cr\ :sub:`10` |
| |
| - Cb\ :sub:`11` |
| |
| - Cr\ :sub:`11` |
| |
| - .. row 7 |
| |
| - start + 24: |
| |
| - Cb\ :sub:`20` |
| |
| - Cr\ :sub:`20` |
| |
| - Cb\ :sub:`21` |
| |
| - Cr\ :sub:`21` |
| |
| - .. row 8 |
| |
| - start + 28: |
| |
| - Cb\ :sub:`30` |
| |
| - Cr\ :sub:`30` |
| |
| - Cb\ :sub:`31` |
| |
| - Cr\ :sub:`31` |
| |
| |
| **Color Sample Location..** |
| |
| |
| |
| .. flat-table:: |
| :header-rows: 0 |
| :stub-columns: 0 |
| |
| |
| - .. row 1 |
| |
| - |
| - 0 |
| |
| - |
| - 1 |
| |
| - |
| - 2 |
| |
| - |
| - 3 |
| |
| - .. row 2 |
| |
| - 0 |
| |
| - Y |
| |
| - |
| - Y |
| |
| - |
| - Y |
| |
| - |
| - Y |
| |
| - .. row 3 |
| |
| - |
| - |
| - C |
| |
| - |
| - |
| - |
| - C |
| |
| - |
| |
| - .. row 4 |
| |
| - 1 |
| |
| - Y |
| |
| - |
| - Y |
| |
| - |
| - Y |
| |
| - |
| - Y |
| |
| - .. row 5 |
| |
| - |
| - |
| - C |
| |
| - |
| - |
| - |
| - C |
| |
| - |
| |
| - .. row 6 |
| |
| - |
| |
| - .. row 7 |
| |
| - 2 |
| |
| - Y |
| |
| - |
| - Y |
| |
| - |
| - Y |
| |
| - |
| - Y |
| |
| - .. row 8 |
| |
| - |
| - |
| - C |
| |
| - |
| - |
| - |
| - C |
| |
| - |
| |
| - .. row 9 |
| |
| - 3 |
| |
| - Y |
| |
| - |
| - Y |
| |
| - |
| - Y |
| |
| - |
| - Y |
| |
| - .. row 10 |
| |
| - |
| - |
| - C |
| |
| - |
| - |
| - |
| - C |
| |
| - |
| |
| |
| |
| |
| .. ------------------------------------------------------------------------------ |
| .. This file was automatically converted from DocBook-XML with the dbxml |
| .. library (https://github.com/return42/sphkerneldoc). The origin XML comes |
| .. from the linux kernel, refer to: |
| .. |
| .. * https://github.com/torvalds/linux/tree/master/Documentation/DocBook |
| .. ------------------------------------------------------------------------------ |