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Diffstat (limited to 'Documentation/DocBook/media/v4l/pixfmt.xml')
| -rw-r--r-- | Documentation/DocBook/media/v4l/pixfmt.xml | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/Documentation/DocBook/media/v4l/pixfmt.xml b/Documentation/DocBook/media/v4l/pixfmt.xml index 965ea91..4173333 100644 --- a/Documentation/DocBook/media/v4l/pixfmt.xml +++ b/Documentation/DocBook/media/v4l/pixfmt.xml @@ -540,6 +540,10 @@ colorspaces except for BT.2020 which uses limited range R'G'B' quantization.</pa <entry>See <xref linkend="col-bt2020" />.</entry> </row> <row> + <entry><constant>V4L2_COLORSPACE_DCI_P3</constant></entry> + <entry>See <xref linkend="col-dcip3" />.</entry> + </row> + <row> <entry><constant>V4L2_COLORSPACE_SMPTE240M</constant></entry> <entry>See <xref linkend="col-smpte-240m" />.</entry> </row> @@ -601,6 +605,10 @@ colorspaces except for BT.2020 which uses limited range R'G'B' quantization.</pa <entry><constant>V4L2_XFER_FUNC_NONE</constant></entry> <entry>Do not use a transfer function (i.e. use linear RGB values).</entry> </row> + <row> + <entry><constant>V4L2_XFER_FUNC_DCI_P3</constant></entry> + <entry>Use the DCI-P3 transfer function.</entry> + </row> </tbody> </tgroup> </table> @@ -1154,6 +1162,68 @@ clamped to the range [-0.5…0.5]. The Y'CbCr quantization is limited range clamped to the range [-0.5…0.5]. The Yc'CbcCrc quantization is limited range.</para> </section> + <section id="col-dcip3"> + <title>Colorspace DCI-P3 (<constant>V4L2_COLORSPACE_DCI_P3</constant>)</title> + <para>The <xref linkend="smpte431" /> standard defines the colorspace used by cinema +projectors that use the DCI-P3 colorspace. +The default transfer function is <constant>V4L2_XFER_FUNC_DCI_P3</constant>. +The default Y'CbCr encoding is <constant>V4L2_YCBCR_ENC_709</constant>. Note that this +colorspace does not specify a Y'CbCr encoding since it is not meant to be encoded +to Y'CbCr. So this default Y'CbCr encoding was picked because it is the HDTV +encoding. The default Y'CbCr quantization is limited range. The chromaticities of +the primary colors and the white reference are:</para> + <table frame="none"> + <title>DCI-P3 Chromaticities</title> + <tgroup cols="3" align="left"> + &cs-str; + <thead> + <row> + <entry>Color</entry> + <entry>x</entry> + <entry>y</entry> + </row> + </thead> + <tbody valign="top"> + <row> + <entry>Red</entry> + <entry>0.6800</entry> + <entry>0.3200</entry> + </row> + <row> + <entry>Green</entry> + <entry>0.2650</entry> + <entry>0.6900</entry> + </row> + <row> + <entry>Blue</entry> + <entry>0.1500</entry> + <entry>0.0600</entry> + </row> + <row> + <entry>White Reference</entry> + <entry>0.3140</entry> + <entry>0.3510</entry> + </row> + </tbody> + </tgroup> + </table> + <variablelist> + <varlistentry> + <term>Transfer function:</term> + <listitem> + <para>L' = L<superscript>1/2.6</superscript></para> + </listitem> + </varlistentry> + <varlistentry> + <term>Inverse Transfer function:</term> + <listitem> + <para>L = L'<superscript>2.6</superscript></para> + </listitem> + </varlistentry> + </variablelist> + <para>Y'CbCr encoding is not specified. V4L2 defaults to Rec. 709.</para> + </section> + <section id="col-smpte-240m"> <title>Colorspace SMPTE 240M (<constant>V4L2_COLORSPACE_SMPTE240M</constant>)</title> <para>The <xref linkend="smpte240m" /> standard was an interim standard used during |
