[v7,08/15] libcamera: controls: Define a new core Hue control
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Message ID 20260213-kbingham-quantizers-v7-8-1626b9aaabf1@ideasonboard.com
State New
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Series
  • libipa: Introduce a Quantized type
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Commit Message

Kieran Bingham Feb. 13, 2026, 4:57 p.m. UTC 
From: "van Veen, Stephan" <stephan.vanveen@karlstorz.com>

Define a new control to support configuration of Hue adjustments when
supported by the available platform.

Reviewed-by: Isaac Scott <isaac.scott@ideasonboard.com>
Signed-off-by: van Veen, Stephan <stephan.vanveen@karlstorz.com>
[Kieran: Rework to define as a rotation in degrees]
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

---
v5:
 - Reworked control definition and direction
---
 src/libcamera/control_ids_core.yaml | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

Patch
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diff --git a/src/libcamera/control_ids_core.yaml b/src/libcamera/control_ids_core.yaml
index f26a1b1b08bd..6df4bc9a0372 100644
--- a/src/libcamera/control_ids_core.yaml
+++ b/src/libcamera/control_ids_core.yaml
@@ -1361,4 +1361,19 @@  controls:
       description: |
         Enable or disable the lens shading correction.
 
+  - Hue:
+      type: float
+      direction: inout
+      description: |
+        Adjusts the image hue (colour rotation) in degrees, as defined in
+        the HSL/HSV colour model.
+
+        The value represents a rotation around the hue circle in HSL/HSV space:
+        positive values rotate hues clockwise (for example a +60° turns
+        Red hues to Yellow hues), and negative values rotate counter-clockwise
+        (a -60° turns Red hues to Magenta hues).
+
+        The nominal range is [-180, 180[, where 0° leaves hues unchanged and the
+        range wraps around continuously, with 180° == -180°.
+
 ...