V4L2_PIX_FMT_NV12M ('NM12'), V4L2_PIX_FMT_NV21M ('NM21'), V4L2_PIX_FMT_NV12MT_16X16

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`V4L2_PIX_FMT_NV12M`

`V4L2_PIX_FMT_NV21M`

`V4L2_PIX_FMT_NV12MT_16X16`

Variation of `V4L2_PIX_FMT_NV12` and `V4L2_PIX_FMT_NV21` with planes non contiguous in memory.

## Description

This is a multi-planar, two-plane version of the YUV 4:2:0 format. The three components are separated into two sub-images or planes. `V4L2_PIX_FMT_NV12M` differs from `V4L2_PIX_FMT_NV12` in that the two planes are non-contiguous in memory, i.e. the chroma plane do not necessarily immediately follows the luma plane. The luminance data occupies the first plane. The Y plane has one byte per pixel. In the second plane there is a chrominance data with alternating chroma samples. The CbCr plane is the same width, in bytes, as the Y plane (and of the image), but is half as tall in pixels. Each CbCr pair belongs to four pixels. For example, Cb0/Cr0 belongs to Y'00, Y'01, Y'10, Y'11. `V4L2_PIX_FMT_NV12MT_16X16` is the tiled version of `V4L2_PIX_FMT_NV12M` with 16x16 macroblock tiles. Here pixels are arranged in 16x16 2D tiles and tiles are arranged in linear order in memory. `V4L2_PIX_FMT_NV21M` is the same as `V4L2_PIX_FMT_NV12M` except the Cb and Cr bytes are swapped, the CrCb plane starts with a Cr byte.

`V4L2_PIX_FMT_NV12M` is intended to be used only in drivers and applications that support the multi-planar API, described in planar-apis.

If the Y plane has pad bytes after each row, then the CbCr plane has as many pad bytes after its rows.

### `V4L2_PIX_FMT_NV12M` 4 × 4 pixel image

### Byte Order.

Each cell is one byte.

start0 + 0: | Y'00 | Y'01 | Y'02 | Y'03
start0 + 4: | Y'10 | Y'11 | Y'12 | Y'13
start0 + 8: | Y'20 | Y'21 | Y'22 | Y'23
start0 + 12: | Y'30 | Y'31 | Y'32 | Y'33
start1 + 0: | Cb00 | Cr00 | Cb01 | Cr01
start1 + 4: | Cb10 | Cr10 | Cb11 | Cr11

### Color Sample Location.

| 0 |  | 1 |  | 2 |  | 3
0 | Y |  | Y |  | Y |  | Y
|  | C |  |  |  | C |
1 | Y |  | Y |  | Y |  | Y
2 | Y |  | Y |  | Y |  | Y
|  | C |  |  |  | C |
3 | Y |  | Y |  | Y |  | Y