[media] Documentation: Add HSV format

Describe the HSV formats

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

Documentation/media/uapi/v4l/hsv-formats.rst

@@ -0,0 +1,19 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _hsv-formats:
+
+***********
+HSV Formats
+***********
+
+These formats store the color information of the image
+in a geometrical representation. The colors are mapped into a
+cylinder, where the angle is the HUE, the height is the VALUE
+and the distance to the center is the SATURATION. This is a very
+useful format for image segmentation algorithms.
+
+
+.. toctree::
+    :maxdepth: 1
+
+    pixfmt-packed-hsv

Documentation/media/uapi/v4l/pixfmt-packed-hsv.rst

@@ -0,0 +1,156 @@
+.. -*- coding: utf-8; mode: rst -*-
+
+.. _packed-hsv:
+
+******************
+Packed HSV formats
+******************
+
+Description
+===========
+
+The *hue* (h) is measured in degrees, one LSB represents two degrees.
+The *saturation* (s) and the *value* (v) are measured in percentage of the
+cylinder: 0 being the smallest value and 255 the maximum.
+
+
+The values are packed in 24 or 32 bit formats.
+
+.. raw:: latex
+
+    \newline\begin{adjustbox}{width=\columnwidth}
+
+.. tabularcolumns:: |p{4.2cm}|p{1.0cm}|p{0.7cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.2cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.2cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.2cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{0.4cm}|p{1.7cm}|
+
+.. _packed-hsv-formats:
+
+.. flat-table:: Packed HSV Image Formats
+    :header-rows:  2
+    :stub-columns: 0
+
+    * - Identifier
+      - Code
+      -
+      - :cspan:`7` Byte 0 in memory
+      -
+      - :cspan:`7` Byte 1
+      -
+      - :cspan:`7` Byte 2
+      -
+      - :cspan:`7` Byte 3
+    * -
+      -
+      - Bit
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+      -
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+      -
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+      -
+      - 7
+      - 6
+      - 5
+      - 4
+      - 3
+      - 2
+      - 1
+      - 0
+    * .. _V4L2-PIX-FMT-HSV32:
+
+      - ``V4L2_PIX_FMT_HSV32``
+      - 'HSV4'
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      -
+      - h\ :sub:`7`
+      - h\ :sub:`6`
+      - h\ :sub:`5`
+      - h\ :sub:`4`
+      - h\ :sub:`3`
+      - h\ :sub:`2`
+      - h\ :sub:`1`
+      - h\ :sub:`0`
+      -
+      - s\ :sub:`7`
+      - s\ :sub:`6`
+      - s\ :sub:`5`
+      - s\ :sub:`4`
+      - s\ :sub:`3`
+      - s\ :sub:`2`
+      - s\ :sub:`1`
+      - s\ :sub:`0`
+      -
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+    * .. _V4L2-PIX-FMT-HSV24:
+
+      - ``V4L2_PIX_FMT_HSV24``
+      - 'HSV3'
+      -
+      - h\ :sub:`7`
+      - h\ :sub:`6`
+      - h\ :sub:`5`
+      - h\ :sub:`4`
+      - h\ :sub:`3`
+      - h\ :sub:`2`
+      - h\ :sub:`1`
+      - h\ :sub:`0`
+      -
+      - s\ :sub:`7`
+      - s\ :sub:`6`
+      - s\ :sub:`5`
+      - s\ :sub:`4`
+      - s\ :sub:`3`
+      - s\ :sub:`2`
+      - s\ :sub:`1`
+      - s\ :sub:`0`
+      -
+      - v\ :sub:`7`
+      - v\ :sub:`6`
+      - v\ :sub:`5`
+      - v\ :sub:`4`
+      - v\ :sub:`3`
+      - v\ :sub:`2`
+      - v\ :sub:`1`
+      - v\ :sub:`0`
+      -
+      -
+.. raw:: latex
+
+    \end{adjustbox}\newline\newline
+
+Bit 7 is the most significant bit.

Documentation/media/uapi/v4l/pixfmt.rst

@@ -29,6 +29,7 @@ see also :ref:`VIDIOC_G_FBUF <VIDIOC_G_FBUF>`.)
     pixfmt-indexed
     pixfmt-rgb
     yuv-formats
+    hsv-formats
     depth-formats
     pixfmt-013
     sdr-formats

Documentation/media/uapi/v4l/v4l2.rst

@@ -89,6 +89,11 @@ part can be used and distributed without restrictions.
 Revision History
 ****************
 
+:revision: 4.10 / 2016-07-15 (*rr*)
+
+Introduce HSV formats.
+
+
 :revision: 4.5 / 2015-10-29 (*rr*)
 
 Extend VIDIOC_G_EXT_CTRLS;. Replace ctrl_class with a new union with