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Diffstat (limited to 'Documentation/DocBook/media/v4l/pixfmt.xml')
| -rw-r--r-- | Documentation/DocBook/media/v4l/pixfmt.xml | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/Documentation/DocBook/media/v4l/pixfmt.xml b/Documentation/DocBook/media/v4l/pixfmt.xml index 41733331af4c..70cd0fd02e12 100644 --- a/Documentation/DocBook/media/v4l/pixfmt.xml +++ b/Documentation/DocBook/media/v4l/pixfmt.xml @@ -609,6 +609,10 @@ colorspaces except for BT.2020 which uses limited range R'G'B' quantization.</pa <entry><constant>V4L2_XFER_FUNC_DCI_P3</constant></entry> <entry>Use the DCI-P3 transfer function.</entry> </row> + <row> + <entry><constant>V4L2_XFER_FUNC_SMPTE2084</constant></entry> + <entry>Use the SMPTE 2084 transfer function.</entry> + </row> </tbody> </tgroup> </table> @@ -1472,6 +1476,41 @@ and <constant>V4L2_QUANTIZATION_FULL_RANGE</constant>.</para> </section> + <section> + <title>Detailed Transfer Function Descriptions</title> + <section id="xf-smpte-2084"> + <title>Transfer Function SMPTE 2084 (<constant>V4L2_XFER_FUNC_SMPTE2084</constant>)</title> + <para>The <xref linkend="smpte2084" /> standard defines the transfer function used by +High Dynamic Range content.</para> + <variablelist> + <varlistentry> + <term>Constants:</term> + <listitem> + <para>m1 = (2610 / 4096) / 4</para> + <para>m2 = (2523 / 4096) * 128</para> + <para>c1 = 3424 / 4096</para> + <para>c2 = (2413 / 4096) * 32</para> + <para>c3 = (2392 / 4096) * 32</para> + </listitem> + </varlistentry> + <varlistentry> + <term>Transfer function:</term> + <listitem> + <para>L' = ((c1 + c2 * L<superscript>m1</superscript>) / (1 + c3 * L<superscript>m1</superscript>))<superscript>m2</superscript></para> + </listitem> + </varlistentry> + </variablelist> + <variablelist> + <varlistentry> + <term>Inverse Transfer function:</term> + <listitem> + <para>L = (max(L'<superscript>1/m2</superscript> - c1, 0) / (c2 - c3 * L'<superscript>1/m2</superscript>))<superscript>1/m1</superscript></para> + </listitem> + </varlistentry> + </variablelist> + </section> + </section> + <section id="pixfmt-indexed"> <title>Indexed Format</title> |