[libcamera-devel] [PATCH v3 0/5] ipa: ipu3: af: Small improvements

[Kieran Bingham]

Following review of the IPU3 Af implementation, the following additional
improvements were identified.

No functional change to the running of the algorithm is intended or
expected, though this does remove a memcpy, and adapts to use a Span for
range based iterators, as well as hopefully make it easier to use custom
ROI's and return the AF regions in later developments.

 *** This is only compile tested! ***

Kate/JM - could you test this please?

v3:
 - Minor cleanups from Laurent and collect tags.
 - Keeping the two loop implementation of Af::afEstimateVariance
   to prevent risk of "catasrophic cancellation".

Kieran Bingham (5):
  ipa: ipu3: af: Move constants to implementation
  ipa: ipu3: af: Use geometry classes to perform grid centering
  ipa: ipu3: af: Remove redundant memcpy
  ipa: ipu3: af: Use Span for y_table_item_t
  ipa: ipu3: af: Simplify accumulations of y_items

 src/ipa/ipu3/algorithms/af.cpp | 140 +++++++++++++--------------------
 src/ipa/ipu3/algorithms/af.h   |  15 +---
 2 files changed, 56 insertions(+), 99 deletions(-)

-- 
2.32.0