diff options
| author | Paul Elder <paul.elder@ideasonboard.com> | 2024-04-19 14:56:10 +0900 |
|---|---|---|
| committer | Paul Elder <paul.elder@ideasonboard.com> | 2024-05-09 21:08:21 +0900 |
| commit | f1522e94dfaedcde26280eb6387f2c6f2de66fd7 (patch) | |
| tree | 05b9903a67f56f1e075eacc37d0204da6fdd4890 /src/ipa/rkisp1/algorithms/agc.cpp | |
| parent | 299e5278bd7657c785b7adac0c4f02d7e42f22c2 (diff) | |
ipa: rkisp1: agc: Fix histogram construction
This histogram reported by the rkisp1 hardware is 20 bits, where the
upper 16 bits are meaningful integer data and the lower 4 bits are
fractional and meant to be discarded. Remove these 4 bits when
construction the histogram.
Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'src/ipa/rkisp1/algorithms/agc.cpp')
| -rw-r--r-- | src/ipa/rkisp1/algorithms/agc.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/ipa/rkisp1/algorithms/agc.cpp b/src/ipa/rkisp1/algorithms/agc.cpp index c1333b59..50e0690f 100644 --- a/src/ipa/rkisp1/algorithms/agc.cpp +++ b/src/ipa/rkisp1/algorithms/agc.cpp @@ -277,7 +277,9 @@ void Agc::process(IPAContext &context, [[maybe_unused]] const uint32_t frame, const rkisp1_cif_isp_stat *params = &stats->params; ASSERT(stats->meas_type & RKISP1_CIF_ISP_STAT_AUTOEXP); - Histogram hist({ params->hist.hist_bins, context.hw->numHistogramBins }); + /* The lower 4 bits are fractional and meant to be discarded. */ + Histogram hist({ params->hist.hist_bins, context.hw->numHistogramBins }, + [](uint32_t x) { return x >> 4; }); expMeans_ = { params->ae.exp_mean, context.hw->numAeCells }; /* |