[PATCH v3 0/3] Add Face Detection Controls

[Harvey Yang]

Hi folks,

This series of patches adds face detection controls in the control ids,
the corresponding usages, and a c'tor of libcamera::Rectangle to
construct it easiler with face detection results.

It passed gitlab pipeline checks:
https://gitlab.freedesktop.org/chenghaoyang/libcamera/-/pipelines/1261374

This is one of the series cherry-picked from cros mtkisp7 branch.

The corresponding CLs in cros are:
https://chromium-review.googlesource.com/c/chromiumos/third_party/libcamera/+/4741266
https://chromium-review.googlesource.com/c/chromiumos/third_party/libcamera/+/4741267
https://chromium-review.googlesource.com/c/chromiumos/third_party/libcamera/+/5669229
https://chromium-review.googlesource.com/c/chromiumos/third_party/libcamera/+/5669232

The usages in pipeline handler mtkisp7 will be added later.

The checkstyle's suggestion on the second patch is ignored, as it
changes the style of previous code.

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

Yudhistira Erlandinata (2):
  libcamera: Add rectangle two-point constructor
  libcamera: Add face detection controls

 include/libcamera/controls.h         |  6 +++
 include/libcamera/geometry.h         |  2 +
 src/android/camera_capabilities.cpp  | 45 ++++++++++++++++++--
 src/android/camera_device.cpp        | 61 ++++++++++++++++++++++++++-
 src/libcamera/control_ids_draft.yaml | 63 ++++++++++++++++++++++++++++
 src/libcamera/controls.cpp           |  6 +++
 src/libcamera/geometry.cpp           | 14 +++++++
 7 files changed, 191 insertions(+), 6 deletions(-)

-- 
2.46.0.469.g59c65b2a67-goog