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[media] videodev2.h: fix sYCC/AdobeYCC default quantization range

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The default quantization range of the Y'CbCr encodings of sRGB
and AdobeRGB are full range instead of limited range according to
the corresponding standards.

Fix this in the V4L2_MAP_QUANTIZATION_DEFAULT macro.

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 05:51:12 -03:00 committed by Mauro Carvalho Chehab
parent bee3d51156
commit 7e0739cd9c
2 changed files with 6 additions and 5 deletions
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4
Documentation/media/uapi/v4l/pixfmt-007.rst
View File

@ -367,7 +367,7 @@ The :ref:`adobergb` standard defines the colorspace used by computer
graphics that use the AdobeRGB colorspace. This is also known as the
:ref:`oprgb` standard. The default transfer function is
``V4L2_XFER_FUNC_ADOBERGB``. The default Y'CbCr encoding is
``V4L2_YCBCR_ENC_601``. The default Y'CbCr quantization is limited
``V4L2_YCBCR_ENC_601``. The default Y'CbCr quantization is full
range. The chromaticities of the primary colors and the white reference
are:
@ -448,7 +448,7 @@ the following ``V4L2_YCBCR_ENC_601`` encoding:
Y' is clamped to the range [0…1] and Cb and Cr are clamped to the range
[-0.5…0.5]. This transform is identical to one defined in SMPTE
170M/BT.601. The Y'CbCr quantization is limited range.
170M/BT.601. The Y'CbCr quantization is full range.
.. _col-bt2020:

7
include/uapi/linux/videodev2.h
View File

@ -345,8 +345,8 @@ enum v4l2_quantization {
/*
* The default for R'G'B' quantization is always full range, except
* for the BT2020 colorspace. For Y'CbCr the quantization is always
* limited range, except for COLORSPACE_JPEG, SYCC, XV601 or XV709:
* those are full range.
* limited range, except for COLORSPACE_JPEG, SRGB, ADOBERGB,
* XV601 or XV709: those are full range.
*/
V4L2_QUANTIZATION_DEFAULT = 0,
V4L2_QUANTIZATION_FULL_RANGE = 1,
@ -361,7 +361,8 @@ enum v4l2_quantization {
#define V4L2_MAP_QUANTIZATION_DEFAULT(is_rgb, colsp, ycbcr_enc) \
(((is_rgb) && (colsp) == V4L2_COLORSPACE_BT2020) ? V4L2_QUANTIZATION_LIM_RANGE : \
(((is_rgb) || (ycbcr_enc) == V4L2_YCBCR_ENC_XV601 || \
(ycbcr_enc) == V4L2_YCBCR_ENC_XV709 || (colsp) == V4L2_COLORSPACE_JPEG) ? \
(ycbcr_enc) == V4L2_YCBCR_ENC_XV709 || (colsp) == V4L2_COLORSPACE_JPEG) || \
(colsp) == V4L2_COLORSPACE_ADOBERGB || (colsp) == V4L2_COLORSPACE_SRGB ? \
V4L2_QUANTIZATION_FULL_RANGE : V4L2_QUANTIZATION_LIM_RANGE))
enum v4l2_priority {