[PATCH v9 0/5] Add Face Detection Controls

[Jacopo Mondi]

I took over "[PATCH v8 0/3] Add Face Detection Controls" on top of the patch
to the Rectangle class on which we have gone back and forth for the last week

Harvey and cros team please review the first patch and test if you think it's
needed.

v9:
- add "libcamera: geometry: Clarify Rectangle's top-left corner"
- Rebase 2/5 on top of this using min(p1.y, p2.y)
- Break out 3/5 from 4/5
- Reword parts of 4/5 to make it more similar to the existing controls
  descriptions
- Make FaceDetectMode a int32_t as required by
  e6da224926b0 ("libcamera: controls: Handle enum values without a cast")
- Use int32_t as a type for FaceDetectMode in 5/5
- Populate ANDROID_STATISTICS_FACE_SCORES with actual face scores
- Populate the ANDROID_STATISTICS_FACE_DETECT_MODE metadata from settings
  only if present

Pipeline:
https://gitlab.freedesktop.org/camera/libcamera/-/pipelines/1280968


v8: Reverted back to v5 that new control ids in the draft.

v7: Fixed comments.

v6:
- Added control_ids_android as the new control id list.
  - Moved the new control ids there, instead of in draft.

v5:
- Rewrote Rectangle's c'tor that allows any two diagonal points.
  - Added unit tests.

v4:
- Added support of FaceDetectModeFull and FaceDetectFaceIds.
- Fixed descriptions of control sizes.

v3: Applied fixes according to Jacopo's comments.
- Moved the new face detection controls from core to draft.
- Amended new controls' descriptions.

v2:
- Squashed the fourth CL into the last patch, as it's a fix.
- Fixed CLs based on checkstyle's suggestions.


Harvey Yang (1):
  libcamera: android: Add face detection control support

Jacopo Mondi (1):
  libcamera: geometry: Clarify Rectangle's top-left corner

Yudhistira Erlandinata (3):
  libcamera: geometry: Add two-point Rectangle constructor
  libcamera: controls: Add ControlTypePoint
  libcamera: control_ids_draft: Add face detection controls

 include/libcamera/controls.h         |   6 ++
 include/libcamera/geometry.h         |   7 ++
 src/android/camera_capabilities.cpp  |  44 +++++++-
 src/android/camera_device.cpp        |  66 +++++++++++-
 src/libcamera/control_ids_draft.yaml |  82 +++++++++++++++
 src/libcamera/controls.cpp           |   6 ++
 src/libcamera/geometry.cpp           | 151 +++++++++++++++++++++++++++
 test/geometry.cpp                    |  14 +++
 8 files changed, 370 insertions(+), 6 deletions(-)

--
2.46.1