| .. -*- coding: utf-8; mode: rst -*- |
| |
| .. _V4L2-PIX-FMT-YUV411P: |
| |
| ***************************** |
| V4L2_PIX_FMT_YUV411P ('411P') |
| ***************************** |
| |
| *man V4L2_PIX_FMT_YUV411P(2)* |
| |
| Format with ¼ horizontal chroma resolution, also known as YUV 4:1:1. |
| Planar layout as opposed to ``V4L2_PIX_FMT_Y41P`` |
| |
| |
| Description |
| =========== |
| |
| This format is not commonly used. This is a planar format similar to the |
| 4:2:2 planar format except with half as many chroma. The three |
| components are separated into three sub-images or planes. The Y plane is |
| first. The Y plane has one byte per pixel. The Cb plane immediately |
| follows the Y plane in memory. The Cb plane is ¼ the width of the Y |
| plane (and of the image). Each Cb belongs to 4 pixels all on the same |
| row. For example, Cb\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`, |
| Y'\ :sub:`02` and Y'\ :sub:`03`. Following the Cb plane is the Cr plane, |
| just like the Cb plane. |
| |
| If the Y plane has pad bytes after each row, then the Cr and Cb planes |
| have ¼ as many pad bytes after their rows. In other words, four C x rows |
| (including padding) is exactly as long as one Y row (including padding). |
| |
| **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` |
| |
| - .. row 6 |
| |
| - start + 17: |
| |
| - Cb\ :sub:`10` |
| |
| - .. row 7 |
| |
| - start + 18: |
| |
| - Cb\ :sub:`20` |
| |
| - .. row 8 |
| |
| - start + 19: |
| |
| - Cb\ :sub:`30` |
| |
| - .. row 9 |
| |
| - start + 20: |
| |
| - Cr\ :sub:`00` |
| |
| - .. row 10 |
| |
| - start + 21: |
| |
| - Cr\ :sub:`10` |
| |
| - .. row 11 |
| |
| - start + 22: |
| |
| - Cr\ :sub:`20` |
| |
| - .. row 12 |
| |
| - start + 23: |
| |
| - Cr\ :sub:`30` |
| |
| |
| **Color Sample Location..** |
| |
| |
| |
| .. flat-table:: |
| :header-rows: 0 |
| :stub-columns: 0 |
| |
| |
| - .. row 1 |
| |
| - |
| - 0 |
| |
| - 1 |
| |
| - |
| - 2 |
| |
| - 3 |
| |
| - .. row 2 |
| |
| - 0 |
| |
| - Y |
| |
| - Y |
| |
| - C |
| |
| - Y |
| |
| - Y |
| |
| - .. row 3 |
| |
| - 1 |
| |
| - Y |
| |
| - Y |
| |
| - C |
| |
| - Y |
| |
| - Y |
| |
| - .. row 4 |
| |
| - 2 |
| |
| - Y |
| |
| - Y |
| |
| - C |
| |
| - Y |
| |
| - Y |
| |
| - .. row 5 |
| |
| - 3 |
| |
| - Y |
| |
| - Y |
| |
| - C |
| |
| - Y |
| |
| - Y |