From 8d4f9d241cdbd71a882a852c6e9285de279c0f87 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sun, 18 Jan 2009 13:00:12 +0100 Subject: v4l2spec: add version 0.24 of the spec From: Hans Verkuil Priority: normal Signed-off-by: Hans Verkuil --- v4l2-spec/pixfmt-yuv410.sgml | 141 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 141 insertions(+) create mode 100644 v4l2-spec/pixfmt-yuv410.sgml (limited to 'v4l2-spec/pixfmt-yuv410.sgml') diff --git a/v4l2-spec/pixfmt-yuv410.sgml b/v4l2-spec/pixfmt-yuv410.sgml new file mode 100644 index 000000000..fb989204c --- /dev/null +++ b/v4l2-spec/pixfmt-yuv410.sgml @@ -0,0 +1,141 @@ + + + V4L2_PIX_FMT_YVU410 ('YVU9'), V4L2_PIX_FMT_YUV410 ('YUV9') + &manvol; + + + V4L2_PIX_FMT_YVU410 + V4L2_PIX_FMT_YUV410 + Planar formats with ¼ horizontal and +vertical chroma resolution, also known as YUV 4:1:0 + + + Description + + These are planar formats, as opposed to a packed format. +The three components are separated into three sub-images or planes. +The Y plane is first. The Y plane has one byte per pixel. For +V4L2_PIX_FMT_YVU410, the Cr plane immediately +follows the Y plane in memory. The Cr plane is ¼ the width and +¼ the height of the Y plane (and of the image). Each Cr belongs +to 16 pixels, a four-by-four square of the image. Following the Cr +plane is the Cb plane, just like the Cr plane. +V4L2_PIX_FMT_YUV410 is the same, except the Cb +plane comes first, then the Cr plane. + + If the Y plane has pad bytes after each row, then the Cr +and Cb planes have ¼ as many pad bytes after their rows. In +other words, four Cx rows (including padding) are exactly as long as +one Y row (including padding). + + + <constant>V4L2_PIX_FMT_YVU410</constant> 4 × 4 +pixel image + + + 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: + Cr00 + + + start + 17: + Cb00 + + + + + + + + + Color Sample Location. + + + + + + + 01 + 23 + + + 0 + YY + YY + + + + + + 1 + YY + YY + + + + C + + + + 2 + YY + YY + + + + + + 3 + YY + YY + + + + + + + + + + + -- cgit v1.2.3