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[media] pixfmt.rst: drop V4L2_YCBCR_ENC_SYCC from the documentation

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The V4L2_YCBCR_ENC_SYCC encoding is identical to V4L2_YCBCR_ENC_601.
Remove V4L2_YCBCR_ENC_SYCC from the documentation since it should not
be used.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Hans Verkuil 2016-08-04 06:09:03 -03:00 committed by Mauro Carvalho Chehab
parent adca8c8e25
commit dda3aeaa16
2 changed files with 6 additions and 16 deletions
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10
Documentation/media/uapi/v4l/pixfmt-006.rst
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@ -229,23 +229,17 @@ needs to be filled in.
- .. row 7 - .. row 7
- ``V4L2_YCBCR_ENC_SYCC``
- Use the extended gamut sYCC encoding.
- .. row 8
- ``V4L2_YCBCR_ENC_BT2020`` - ``V4L2_YCBCR_ENC_BT2020``
- Use the default non-constant luminance BT.2020 Y'CbCr encoding. - Use the default non-constant luminance BT.2020 Y'CbCr encoding.
- .. row 9 - .. row 8
- ``V4L2_YCBCR_ENC_BT2020_CONST_LUM`` - ``V4L2_YCBCR_ENC_BT2020_CONST_LUM``
- Use the constant luminance BT.2020 Yc'CbcCrc encoding. - Use the constant luminance BT.2020 Yc'CbcCrc encoding.
- .. row 10 - .. row 9
- ``V4L2_YCBCR_ENC_SMPTE_240M`` - ``V4L2_YCBCR_ENC_SMPTE_240M``

12
Documentation/media/uapi/v4l/pixfmt-007.rst
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@ -261,7 +261,7 @@ Colorspace sRGB (V4L2_COLORSPACE_SRGB)
The :ref:`srgb` standard defines the colorspace used by most webcams The :ref:`srgb` standard defines the colorspace used by most webcams
and computer graphics. The default transfer function is and computer graphics. The default transfer function is
``V4L2_XFER_FUNC_SRGB``. The default Y'CbCr encoding is ``V4L2_XFER_FUNC_SRGB``. The default Y'CbCr encoding is
``V4L2_YCBCR_ENC_SYCC``. The default Y'CbCr quantization is full range. ``V4L2_YCBCR_ENC_601``. The default Y'CbCr quantization is full range.
The chromaticities of the primary colors and the white reference are: The chromaticities of the primary colors and the white reference are:
@ -339,8 +339,7 @@ Inverse Transfer function:
L = ((L' + 0.055) / 1.055) ^{2.4}\text{, for }L' > 0.04045 L = ((L' + 0.055) / 1.055) ^{2.4}\text{, for }L' > 0.04045
The luminance (Y') and color difference (Cb and Cr) are obtained with The luminance (Y') and color difference (Cb and Cr) are obtained with
the following ``V4L2_YCBCR_ENC_SYCC`` encoding as defined by the following ``V4L2_YCBCR_ENC_601`` encoding as defined by :ref:`sycc`:
:ref:`sycc`:
.. math:: .. math::
@ -351,11 +350,8 @@ the following ``V4L2_YCBCR_ENC_SYCC`` encoding as defined by
Cr = 0.5R' - 0.4187G' - 0.0813B' Cr = 0.5R' - 0.4187G' - 0.0813B'
Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range
[-0.5…0.5]. The ``V4L2_YCBCR_ENC_SYCC`` quantization is always full [-0.5…0.5]. This transform is identical to one defined in SMPTE
range. Although this Y'CbCr encoding looks very similar to the 170M/BT.601. The Y'CbCr quantization is full range.
``V4L2_YCBCR_ENC_XV601`` encoding, it is not. The
``V4L2_YCBCR_ENC_XV601`` scales and offsets the Y'CbCr values before
quantization, but this encoding does not do that.
.. _col-adobergb: .. _col-adobergb: