From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001 From: root Date: Fri, 25 Dec 2015 04:40:36 +0000 Subject: initial_commit --- Documentation/DocBook/v4l/pixfmt-nv12m.xml | 154 +++++++++++++++++++++++++++++ 1 file changed, 154 insertions(+) create mode 100644 Documentation/DocBook/v4l/pixfmt-nv12m.xml (limited to 'Documentation/DocBook/v4l/pixfmt-nv12m.xml') diff --git a/Documentation/DocBook/v4l/pixfmt-nv12m.xml b/Documentation/DocBook/v4l/pixfmt-nv12m.xml new file mode 100644 index 00000000..c9e166d9 --- /dev/null +++ b/Documentation/DocBook/v4l/pixfmt-nv12m.xml @@ -0,0 +1,154 @@ + + + V4L2_PIX_FMT_NV12M ('NV12M') + &manvol; + + + V4L2_PIX_FMT_NV12M + Variation of V4L2_PIX_FMT_NV12 with planes + non contiguous in memory. + + + Description + + This is a multi-planar, two-plane version of the YUV 4:2:0 format. +The three components are separated into two sub-images or planes. +V4L2_PIX_FMT_NV12M differs from V4L2_PIX_FMT_NV12 + in that the two planes are non-contiguous in memory, i.e. the chroma +plane do not necessarily immediately follows the luma plane. +The luminance data occupies the first plane. The Y plane has one byte per pixel. +In the second plane there is a chrominance data with alternating chroma samples. +The CbCr plane is the same width, in bytes, as the Y plane (and of the image), +but is half as tall in pixels. Each CbCr pair belongs to four pixels. For example, +Cb0/Cr0 belongs to +Y'00, Y'01, +Y'10, Y'11. + + V4L2_PIX_FMT_NV12M is intended to be +used only in drivers and applications that support the multi-planar API, +described in . + + If the Y plane has pad bytes after each row, then the +CbCr plane has as many pad bytes after its rows. + + + <constant>V4L2_PIX_FMT_NV12M</constant> 4 × 4 pixel image + + + 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 + Cb01 + Cr01 + + + start1 + 4: + Cb10 + Cr10 + Cb11 + Cr11 + + + + + + + + + Color Sample Location. + + + + + + + 01 + 23 + + + 0 + YY + YY + + + + C + C + + + 1 + YY + YY + + + + + + 2 + YY + YY + + + + C + C + + + 3 + YY + YY + + + + + + + + + + + -- cgit v1.2.3