2.6.28. V4L2_PIX_FMT_NV16M (‘NM16’), V4L2_PIX_FMT_NV61M (‘NM61’)

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, Cb0/Cr0 belongs to Y’00, Y’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 Single- and multi-planar APIs.

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 Cb02 Cr02
start1 + 4: Cb10 Cr10 Cb12 Cr12
start1 + 8: Cb20 Cr20 Cb22 Cr22
start1 + 12: Cb30 Cr30 Cb32 Cr32

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