| .. -*- coding: utf-8; mode: rst -*- |
| |
| .. _V4L2-PIX-FMT-YUV422M: |
| .. _v4l2-pix-fmt-yvu422m: |
| |
| ************************************************************ |
| V4L2_PIX_FMT_YUV422M ('YM16'), V4L2_PIX_FMT_YVU422M ('YM61') |
| ************************************************************ |
| |
| |
| V4L2_PIX_FMT_YVU422M |
| Planar formats with ½ horizontal resolution, also known as YUV and YVU |
| 4:2:2 |
| |
| |
| Description |
| =========== |
| |
| This is a multi-planar format, as opposed to a packed format. The three |
| components are separated into three sub-images or planes. |
| |
| The Y plane is first. The Y plane has one byte per pixel. For |
| ``V4L2_PIX_FMT_YUV422M`` the Cb data constitutes the second plane which |
| is half the width of the Y plane (and of the image). Each Cb belongs to |
| two pixels. For example, Cb\ :sub:`0` belongs to Y'\ :sub:`00`, |
| Y'\ :sub:`01`. The Cr data, just like the Cb plane, is in the third |
| plane. |
| |
| ``V4L2_PIX_FMT_YVU422M`` is the same except the Cr data is stored in the |
| second plane and the Cb data in the third plane. |
| |
| If the Y plane has pad bytes after each row, then the Cb and Cr planes |
| have half as many pad bytes after their rows. In other words, two Cx |
| rows (including padding) is exactly as long as one Y row (including |
| padding). |
| |
| ``V4L2_PIX_FMT_YUV422M`` and ``V4L2_PIX_FMT_YVU422M`` are intended to be |
| used only in drivers and applications that support the multi-planar API, |
| described in :ref:`planar-apis`. |
| |
| **Byte Order.** |
| Each cell is one byte. |
| |
| |
| |
| |
| .. flat-table:: |
| :header-rows: 0 |
| :stub-columns: 0 |
| |
| |
| - .. row 1 |
| |
| - start0 + 0: |
| |
| - Y'\ :sub:`00` |
| |
| - Y'\ :sub:`01` |
| |
| - Y'\ :sub:`02` |
| |
| - Y'\ :sub:`03` |
| |
| - .. row 2 |
| |
| - start0 + 4: |
| |
| - Y'\ :sub:`10` |
| |
| - Y'\ :sub:`11` |
| |
| - Y'\ :sub:`12` |
| |
| - Y'\ :sub:`13` |
| |
| - .. row 3 |
| |
| - start0 + 8: |
| |
| - Y'\ :sub:`20` |
| |
| - Y'\ :sub:`21` |
| |
| - Y'\ :sub:`22` |
| |
| - Y'\ :sub:`23` |
| |
| - .. row 4 |
| |
| - start0 + 12: |
| |
| - Y'\ :sub:`30` |
| |
| - Y'\ :sub:`31` |
| |
| - Y'\ :sub:`32` |
| |
| - Y'\ :sub:`33` |
| |
| - .. row 5 |
| |
| - |
| |
| - .. row 6 |
| |
| - start1 + 0: |
| |
| - Cb\ :sub:`00` |
| |
| - Cb\ :sub:`01` |
| |
| - .. row 7 |
| |
| - start1 + 2: |
| |
| - Cb\ :sub:`10` |
| |
| - Cb\ :sub:`11` |
| |
| - .. row 8 |
| |
| - start1 + 4: |
| |
| - Cb\ :sub:`20` |
| |
| - Cb\ :sub:`21` |
| |
| - .. row 9 |
| |
| - start1 + 6: |
| |
| - Cb\ :sub:`30` |
| |
| - Cb\ :sub:`31` |
| |
| - .. row 10 |
| |
| - |
| |
| - .. row 11 |
| |
| - start2 + 0: |
| |
| - Cr\ :sub:`00` |
| |
| - Cr\ :sub:`01` |
| |
| - .. row 12 |
| |
| - start2 + 2: |
| |
| - Cr\ :sub:`10` |
| |
| - Cr\ :sub:`11` |
| |
| - .. row 13 |
| |
| - start2 + 4: |
| |
| - Cr\ :sub:`20` |
| |
| - Cr\ :sub:`21` |
| |
| - .. row 14 |
| |
| - start2 + 6: |
| |
| - Cr\ :sub:`30` |
| |
| - Cr\ :sub:`31` |
| |
| |
| **Color Sample Location..** |
| |
| |
| |
| .. flat-table:: |
| :header-rows: 0 |
| :stub-columns: 0 |
| |
| |
| - .. row 1 |
| |
| - |
| - 0 |
| |
| - |
| - 1 |
| |
| - 2 |
| |
| - |
| - 3 |
| |
| - .. row 2 |
| |
| - 0 |
| |
| - Y |
| |
| - C |
| |
| - Y |
| |
| - Y |
| |
| - C |
| |
| - Y |
| |
| - .. row 3 |
| |
| - 1 |
| |
| - Y |
| |
| - C |
| |
| - Y |
| |
| - Y |
| |
| - C |
| |
| - Y |
| |
| - .. row 4 |
| |
| - 2 |
| |
| - Y |
| |
| - C |
| |
| - Y |
| |
| - Y |
| |
| - C |
| |
| - Y |
| |
| - .. row 5 |
| |
| - 3 |
| |
| - Y |
| |
| - C |
| |
| - Y |
| |
| - Y |
| |
| - C |
| |
| - Y |