[libcamera-devel] [PATCH 1/8] libcamera: controls: Add SensorSequence metadata control

[Kieran Bingham]

Provide a metadata control that allows pipeline handlers to report the
sequence number from the sensor for every request.

This can be used to monitor and validate the sequence numbers of the
captured images and detect any frame drops.

Signed-off-by: Kieran Bingham <kieran.bingham at ideasonboard.com>
---
 src/libcamera/control_ids.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/libcamera/control_ids.yaml b/src/libcamera/control_ids.yaml
index 9d4638ae677e..8874fe75102c 100644
--- a/src/libcamera/control_ids.yaml
+++ b/src/libcamera/control_ids.yaml
@@ -381,6 +381,14 @@ controls:
         \todo Define how the sensor timestamp has to be used in the reprocessing
         use case.
 
+  - SensorSequence:
+      type: int64_t
+      description: |
+        The monotonic sequence number from the sensor.
+
+        Any break in the sequence number is an indication of frame drop or error
+        in the captured stream.
+
   # ----------------------------------------------------------------------------
   # Draft controls section
 
-- 
2.30.2