diff options
Diffstat (limited to 'Documentation/media/uapi/v4l/pixfmt-nv16m.rst')
| -rw-r--r-- | Documentation/media/uapi/v4l/pixfmt-nv16m.rst | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/Documentation/media/uapi/v4l/pixfmt-nv16m.rst b/Documentation/media/uapi/v4l/pixfmt-nv16m.rst new file mode 100644 index 000000000000..b7ee068f491c --- /dev/null +++ b/Documentation/media/uapi/v4l/pixfmt-nv16m.rst @@ -0,0 +1,277 @@ +.. -*- coding: utf-8; mode: rst -*- + +.. _V4L2-PIX-FMT-NV16M: +.. _v4l2-pix-fmt-nv61m: + +******************************************************** +V4L2_PIX_FMT_NV16M ('NM16'), V4L2_PIX_FMT_NV61M ('NM61') +******************************************************** + +*man V4L2_PIX_FMT_NV16M(2)* + +V4L2_PIX_FMT_NV61M +Variation of ``V4L2_PIX_FMT_NV16`` and ``V4L2_PIX_FMT_NV61`` with planes +non contiguous in memory. + + +Description +=========== + +This is a multi-planar, two-plane version of the YUV 4:2:2 format. The +three components are separated into two sub-images or planes. +``V4L2_PIX_FMT_NV16M`` differs from ``V4L2_PIX_FMT_NV16`` in that the +two planes are non-contiguous in memory, i.e. the chroma plane does not +necessarily immediately follow the luma plane. The luminance data +occupies the first plane. The Y plane has one byte per pixel. In the +second plane there is chrominance data with alternating chroma samples. +The CbCr plane is the same width and height, in bytes, as the Y plane. +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_NV61M`` is the same as ``V4L2_PIX_FMT_NV16M`` except the +Cb and Cr bytes are swapped, the CrCb plane starts with a Cr byte. + +``V4L2_PIX_FMT_NV16M`` and ``V4L2_PIX_FMT_NV61M`` 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 + :widths: 2 1 1 1 1 + + + - .. 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` + + - Cr\ :sub:`00` + + - Cb\ :sub:`02` + + - Cr\ :sub:`02` + + - .. row 7 + + - start1 + 4: + + - Cb\ :sub:`10` + + - Cr\ :sub:`10` + + - Cb\ :sub:`12` + + - Cr\ :sub:`12` + + - .. row 8 + + - start1 + 8: + + - Cb\ :sub:`20` + + - Cr\ :sub:`20` + + - Cb\ :sub:`22` + + - Cr\ :sub:`22` + + - .. row 9 + + - start1 + 12: + + - Cb\ :sub:`30` + + - Cr\ :sub:`30` + + - Cb\ :sub:`32` + + - Cr\ :sub:`32` + + +**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 + + - |