2.6.26. V4L2_PIX_FMT_NV16 (‘NV16’), V4L2_PIX_FMT_NV61 (‘NV61’)

V4L2_PIX_FMT_NV61 Formats with ½ horizontal chroma resolution, also known as YUV 4:2:2. One luminance and one chrominance plane with alternating chroma samples as opposed to V4L2_PIX_FMT_YVU420 Description

These are two-plane versions of the YUV 4:2:2 format. The three components are separated into two sub-images or planes. The Y plane is first. The Y plane has one byte per pixel. For V4L2_PIX_FMT_NV16, a combined CbCr plane immediately follows the Y plane in memory. The CbCr plane is the same width and height, in bytes, as the Y plane (and of the image). Each CbCr pair belongs to two pixels. For example, Cb0/Cr0 belongs to Y’00, Y’01. V4L2_PIX_FMT_NV61 is the same except the Cb and Cr bytes are swapped, the CrCb plane starts with a Cr byte.

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

Byte Order. Each cell is one byte.

start + 0: Y’00 Y’01 Y’02 Y’03
start + 4: Y’10 Y’11 Y’12 Y’13
start + 8: Y’20 Y’21 Y’22 Y’23
start + 12: Y’30 Y’31 Y’32 Y’33
start + 16: Cb00 Cr00 Cb01 Cr01
start + 20: Cb10 Cr10 Cb11 Cr11
start + 24: Cb20 Cr20 Cb21 Cr21
start + 28: Cb30 Cr30 Cb31 Cr31

Color Sample Location:

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