2.5.8. V4L2_PIX_FMT_SRGGB12P (‘pRAA’), V4L2_PIX_FMT_SGRBG12P (‘pgAA’), V4L2_PIX_FMT_SGBRG12P (‘pGAA’), V4L2_PIX_FMT_SBGGR12P (‘pBAA’),

12-bit packed Bayer formats

2.5.8.1. Description

These four pixel formats are packed raw sRGB / Bayer formats with 12 bits per colour. Every two consecutive samples are packed into three bytes. Each of the first two bytes contain the 8 high order bits of the pixels, and the third byte contains the four least significants bits of each pixel, in the same order.

Each n-pixel row contains n/2 green samples and n/2 blue or red samples, with alternating green-red and green-blue rows. They are conventionally described as GRGR... BGBG..., RGRG... GBGB..., etc. Below is an example of a small V4L2_PIX_FMT_SBGGR12P image:

Byte Order. Each cell is one byte.

start + 0:	B00high	G01high	G01low(bits 7–4) B00low(bits 3–0)	B02high	G03high	G03low(bits 7–4) B02low(bits 3–0)
start + 6:	G10high	R11high	R11low(bits 7–4) G10low(bits 3–0)	G12high	R13high	R13low(bits 3–2) G12low(bits 3–0)
start + 12:	B20high	G21high	G21low(bits 7–4) B20low(bits 3–0)	B22high	G23high	G23low(bits 7–4) B22low(bits 3–0)
start + 18:	G30high	R31high	R31low(bits 7–4) G30low(bits 3–0)	G32high	R33high	R33low(bits 3–2) G32low(bits 3–0)