On 08/12/2020 15:59, Stanimir Varbanov wrote: > Document Content light level and Mastering display colour volume. > > Signed-off-by: Stanimir Varbanov <stanimir.varbanov@xxxxxxxxxx> > --- > .../userspace-api/media/v4l/common.rst | 1 + > .../media/v4l/ext-ctrls-colorimetry.rst | 88 +++++++++++++++++++ > 2 files changed, 89 insertions(+) > create mode 100644 Documentation/userspace-api/media/v4l/ext-ctrls-colorimetry.rst > > diff --git a/Documentation/userspace-api/media/v4l/common.rst b/Documentation/userspace-api/media/v4l/common.rst > index 8c263c5a85d8..ea0435182e44 100644 > --- a/Documentation/userspace-api/media/v4l/common.rst > +++ b/Documentation/userspace-api/media/v4l/common.rst > @@ -51,6 +51,7 @@ applicable to all devices. > ext-ctrls-fm-tx > ext-ctrls-fm-rx > ext-ctrls-detect > + ext-ctrls-colorimetry > fourcc > format > planar-apis > diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-colorimetry.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-colorimetry.rst > new file mode 100644 > index 000000000000..16d9ddadbab6 > --- /dev/null > +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-colorimetry.rst > @@ -0,0 +1,88 @@ > +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later > + > +.. _colorimetry-controls: > + > +***************************** > +Colorimetry Control Reference > +***************************** > + > +Below are controls within the Colorimetry control class. > + > +Colorimetry Control IDs > +----------------------- > + > +.. _colorimetry-control-id: > + > +``V4L2_CID_COLORIMETRY_CLASS (class)`` > + The Colorimetry class descriptor. > + > +``V4L2_CID_COLORIMETRY_HDR10_CLL_INFO (struct)`` > + The Content Light Level defines upper bounds for the nominal target > + brightness light level of the pictures. > + > +.. c:type:: v4l2_ctrl_hdr10_cll_info > + > +.. cssclass:: longtable > + > +.. flat-table:: struct v4l2_ctrl_hdr10_cll_info > + :header-rows: 0 > + :stub-columns: 0 > + :widths: 1 1 2 > + > + * - __u16 > + - ``max_content_light_level`` > + - An upper bound on the maximum light level among all individual An -> The on -> for > + samples for the pictures of coded video sequence, cd/m2. When of -> of a > + equal to 0 no such uppper bound is present. uppper -> upper > + * - __u16 > + - ``max_pic_average_light_level`` > + - An upper bound on the maximum average light level among the An -> The on -> for > + samples for any individual picture of coded video sequence, cd/m2. of -> of a > + When equal to 0 no such uppper bound is present. uppper -> upper > + > +``V4L2_CID_COLORIMETRY_HDR10_MASTERING_DISPLAY (struct)`` > + The mastering display defines the colour volume (the colour primaries, > + white point and luminance range) of a display considered to be the > + mastering display for current video content. for -> for the > + > +.. c:type:: v4l2_ctrl_hdr10_mastering_display > + > +.. cssclass:: longtable > + > +.. flat-table:: struct v4l2_ctrl_hdr10_mastering_display > + :header-rows: 0 > + :stub-columns: 0 > + :widths: 1 1 2 > + > + * - __u16 > + - ``display_primaries_x[3]`` > + - Specifies the normalized x chromaticity coordinate of the colour > + primary component c of the mastering display in increments of 0.00002. > + For describing mastering display that use Red, Green and Blue colour describing -> describing the use -> uses > + primaries, index value c equal to 0 correspond to Green primary, c to Green -> to the Green correspond -> corresponds > + equal to 1 correspond to Blue primary and c equal to 2 correspond to ditto > + Red colour primary. > + * - __u16 > + - ``display_primaries_y[3]`` > + - Specifies the normalized y chromaticity coordinate of the colour > + primary component c of the mastering display in increments of 0.00002. > + For describing mastering display that use Red, Green and Blue colour > + primaries, index value c equal to 0 correspond to Green primary, c > + equal to 1 correspond to Blue primary and c equal to 2 correspond to > + Red colour primary. ditto > + * - __u16 > + - ``white_point_x`` > + - Specifies the normalized x chromaticity coordinate of the white > + point of the mastering display in increments of 0.00002. > + * - __u16 > + - ``white_point_y`` > + - Specifies the normalized y chromaticity coordinate of the white > + point of the mastering display in increments of 0.00002. > + * - __u32 > + - ``max_luminance`` > + - Specifies the nominal maximum display luminance of the mastering > + display in units of 0.0001 cd/m2. > + * - __u32 > + - ``min_luminance`` > + - specifies the nominal minimum display luminance of the mastering > + display in units of 0.0001 cd/m2. > Regards, Hans
