media/v4l/pixfmt-packed-yuv.rst

15    - In all the tables that follow, bit 7 is the most significant bit in a byte.
17      'U') and red chroma (also known as 'V') components respectively. 'A'
22 4:4:4 Subsampling
25 These formats do not subsample the chroma components and store each pixels as a
28 The next table lists the packed YUV 4:4:4 formats with less than 8 bits per
30 seen in a 16-bit word, which is then stored in memory in little endian byte
32 format stores a pixel in a 16-bit word [15:0] laid out at as [Y'\ :sub:`4-0`
33 Cb\ :sub:`5-0` Cr\ :sub:`4-0`], and stored in memory in two bytes,
34 [Cb\ :sub:`2-0` Cr\ :sub:`4-0`] followed by [Y'\ :sub:`4-0` Cb\ :sub:`5-3`].
44 .. flat-table:: Packed YUV 4:4:4 Image Formats (less than 8bpc)
60       - 4
69       - 4
89       - a\ :sub:`3`
90       - a\ :sub:`2`
91       - a\ :sub:`1`
92       - a\ :sub:`0`
106       - Cr\ :sub:`4`
112       - a
113       - Y'\ :sub:`4`
118       - Cb\ :sub:`4`
129       - Cr\ :sub:`4`
135       - Y'\ :sub:`4`
141       - Cb\ :sub:`4`
152     when alpha blending has been negotiated for a :ref:`Video Overlay
156 The next table lists the packed YUV 4:4:4 formats with 8 bits per component.
159 format stores a pixel with Cr\ :sub:`7-0` in the first byte, Cb\ :sub:`7-0` in
178       - A\ :sub:`7-0`
188       - A\ :sub:`7-0`
211       - A\ :sub:`7-0`
231       - A\ :sub:`7-0`
255     - The alpha component is expected to contain a meaningful value that can be
260 The next table lists the packed YUV 4:4:4 formats with 12 bits per component.
264 .. flat-table:: Packed YUV 4:4:4 Image Formats (12bpc)
272       - Byte 5-4
289 4:2:2 Subsampling
293 components horizontally by 2, storing 2 pixels in a container. The container
306 .. flat-table:: Packed YUV 4:2:2 Formats in 32-bit container
316       - Byte 4
375 .. flat-table:: Packed YUV 4:2:2 Formats in 64-bit container
399       - Y'\ :sub:`0` (bits 15-4)
400       - Cb\ :sub:`0` (bits 15-4)
401       - Y'\ :sub:`1` (bits 15-4)
402       - Cr\ :sub:`0` (bits 15-4)
422 4:1:1 Subsampling
425 This format subsamples the chroma components horizontally by 4, storing 8
434 .. flat-table:: Packed YUV 4:1:1 Formats
444       - Byte 4
461       - Cb\ :sub:`4`
463       - Cr\ :sub:`4`
465       - Y'\ :sub:`4`
478     "YUV 4:1:1 **packed**", while YUV411P stands for "YUV 4:1:1 **planar**".