diff options
| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2024-06-16 00:34:16 +0300 |
|---|---|---|
| committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2024-06-17 16:15:10 +0300 |
| commit | ea43e056a83fcfcf627669b4e5ee922d97c95d4b (patch) | |
| tree | 369f9aaad794a4ac6df76496e8b4113a5ecc8b77 /src/ipa/rkisp1/algorithms/agc.cpp | |
| parent | 05d0f952a36c40392a9c8ccf86d3567a64ecba32 (diff) | |
ipa: rkisp1: agc: Simplify predivider calculation
The condition
if (std::pow(std::floor(root), 2) < factor)
predivider = static_cast<uint8_t>(std::ceil(root));
else
predivider = static_cast<uint8_t>(std::floor(root));
can only be false when the factor's root is an integer. In that case,
std::ceil(root) and std::floor(root) will be equal. The computation can
thus be simplified by always rounding up.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Diffstat (limited to 'src/ipa/rkisp1/algorithms/agc.cpp')
| -rw-r--r-- | src/ipa/rkisp1/algorithms/agc.cpp | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/src/ipa/rkisp1/algorithms/agc.cpp b/src/ipa/rkisp1/algorithms/agc.cpp index 9f3b59b4..a61201bb 100644 --- a/src/ipa/rkisp1/algorithms/agc.cpp +++ b/src/ipa/rkisp1/algorithms/agc.cpp @@ -115,12 +115,7 @@ uint8_t Agc::computeHistogramPredivider(const Size &size, int count = mode == RKISP1_CIF_ISP_HISTOGRAM_MODE_RGB_COMBINED ? 3 : 1; double factor = size.width * size.height * count / 65536.0; double root = std::sqrt(factor); - uint8_t predivider; - - if (std::pow(std::floor(root), 2) < factor) - predivider = static_cast<uint8_t>(std::ceil(root)); - else - predivider = static_cast<uint8_t>(std::floor(root)); + uint8_t predivider = static_cast<uint8_t>(std::ceil(root)); return std::clamp<uint8_t>(predivider, 3, 127); } |