[libcamera-devel] [PATCH 0/9] Use ControlList for both libcamera and V4L2 controls

[Laurent Pinchart]

Hello,

This patch series generalises usage of ControlList for all controls,
both libcamera and V4L2.

The rationale is that using a single container to store controls allows
better sharing of code, especially when we will implement serialisation
and deserialisation. Additionally, a single container type will simplify
the IPA API.

Patch 1/9 restores the global list of libcamera controls that used to be
auto-generated. It isn't strictly required by the rest of the series,
but has been developed with it, so I've included it.

Patches 2/9 to 4/9 then extend ControlList and ControlId with features
required for V4L2 controls. Patch 5/9 is a drive-by optimisation, and is
followed by patch 6/9 that adds a V4L2ControlId class specialising
ControlId. Patch 7/9 is the bulk of the work, and patch 8/9 is a
follow-up cleanup.

Patch 9/9 adds a V4L2 controls validator that has been developed with
the series but isn't strictly required either. We can thus leave it out
for now if desired until we have a use case.

Laurent Pinchart (9):
  libcamera: control_ids: Generate map of all supported controls
  libcamera: controls: Support getting and setting controls by ControlId
  libcamera: controls: Store control name in ControlId
  libcamera: controls: Make ControlList::find() protected
  libcamera: v4l2_device: Avoid copy of V4L2ControlInfo
  libcamera: v4l2_controls: Add V4L2ControlId
  libcamera: v4l2_device: Replace V4L2ControlList with ControlList
  libcamera: v4l2_controls: Remove V4L2ControlInfo type field
  libcamera: v4l2_controls: Add control validator

 include/libcamera/control_ids.h.in    |   3 +
 include/libcamera/controls.h          |  12 +-
 src/libcamera/camera_sensor.cpp       |   4 +-
 src/libcamera/control_ids.cpp.in      |   7 +
 src/libcamera/controls.cpp            |  62 ++++-
 src/libcamera/gen-controls.py         |   7 +-
 src/libcamera/include/camera_sensor.h |   5 +-
 src/libcamera/include/v4l2_controls.h |  55 ++---
 src/libcamera/include/v4l2_device.h   |   8 +-
 src/libcamera/pipeline/ipu3/ipu3.cpp  |   9 +-
 src/libcamera/pipeline/uvcvideo.cpp   |  24 +-
 src/libcamera/pipeline/vimc.cpp       |  25 +-
 src/libcamera/v4l2_controls.cpp       | 323 ++++++++++++--------------
 src/libcamera/v4l2_device.cpp         |  67 +++---
 14 files changed, 326 insertions(+), 285 deletions(-)

-- 
Regards,

Laurent Pinchart