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authorStefan Klug <stefan.klug@ideasonboard.com>2024-07-03 15:49:51 +0200
committerStefan Klug <stefan.klug@ideasonboard.com>2024-07-03 16:41:41 +0200
commit50c28e1351000b879ff38eca8b36751b4ac7c0c9 (patch)
tree765131566045b098ffd453d93d78d7a40c3ece49
parent3df0f0f2b819ba2ddcf55bcca57db4b937d8a545 (diff)
ipa: rkisp1: blc: Query black levels from camera sensor helper
As the camera sensor helper now has the ability to provide the black level, use it. Black levels can still be overwritten by the tuning file, but the direction is to remove them from the tuning files and move them into the sensor helpers. Additionally interpret all values based on 16bits. The conversion to the scale required by the hardware is done in process(). It ensures all the values inside libcamera are the same scale and is in preparation for the i.MX8MP where black levels are based on a 20bit scale. Note that this breaks existing tuning files. The tuning files distributed with libcamera will be fixed in a later patch. Signed-off-by: Stefan Klug <stefan.klug@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
-rw-r--r--src/ipa/rkisp1/algorithms/blc.cpp54
1 files changed, 46 insertions, 8 deletions
diff --git a/src/ipa/rkisp1/algorithms/blc.cpp b/src/ipa/rkisp1/algorithms/blc.cpp
index d2e74354..b17b549c 100644
--- a/src/ipa/rkisp1/algorithms/blc.cpp
+++ b/src/ipa/rkisp1/algorithms/blc.cpp
@@ -46,10 +46,47 @@ BlackLevelCorrection::BlackLevelCorrection()
int BlackLevelCorrection::init([[maybe_unused]] IPAContext &context,
const YamlObject &tuningData)
{
- blackLevelRed_ = tuningData["R"].get<int16_t>(256);
- blackLevelGreenR_ = tuningData["Gr"].get<int16_t>(256);
- blackLevelGreenB_ = tuningData["Gb"].get<int16_t>(256);
- blackLevelBlue_ = tuningData["B"].get<int16_t>(256);
+ std::optional<int16_t> levelRed = tuningData["R"].get<int16_t>();
+ std::optional<int16_t> levelGreenR = tuningData["Gr"].get<int16_t>();
+ std::optional<int16_t> levelGreenB = tuningData["Gb"].get<int16_t>();
+ std::optional<int16_t> levelBlue = tuningData["B"].get<int16_t>();
+ bool tuningHasLevels = levelRed && levelGreenR && levelGreenB && levelBlue;
+
+ auto blackLevel = context.camHelper->blackLevel();
+ if (!blackLevel) {
+ /*
+ * Not all camera sensor helpers have been updated with black
+ * levels. Print a warning and fall back to the levels from the
+ * tuning data to preserve backward compatibility. This should
+ * be removed once all helpers provide the data.
+ */
+ LOG(RkISP1Blc, Warning)
+ << "No black levels provided by camera sensor helper"
+ << ", please fix";
+
+ blackLevelRed_ = levelRed.value_or(4096);
+ blackLevelGreenR_ = levelGreenR.value_or(4096);
+ blackLevelGreenB_ = levelGreenB.value_or(4096);
+ blackLevelBlue_ = levelBlue.value_or(4096);
+ } else if (tuningHasLevels) {
+ /*
+ * If black levels are provided in the tuning file, use them to
+ * avoid breaking existing camera tuning. This is deprecated and
+ * will be removed.
+ */
+ LOG(RkISP1Blc, Warning)
+ << "Deprecated: black levels overwritten by tuning file";
+
+ blackLevelRed_ = *levelRed;
+ blackLevelGreenR_ = *levelGreenR;
+ blackLevelGreenB_ = *levelGreenB;
+ blackLevelBlue_ = *levelBlue;
+ } else {
+ blackLevelRed_ = *blackLevel;
+ blackLevelGreenR_ = *blackLevel;
+ blackLevelGreenB_ = *blackLevel;
+ blackLevelBlue_ = *blackLevel;
+ }
tuningParameters_ = true;
@@ -77,10 +114,11 @@ void BlackLevelCorrection::prepare([[maybe_unused]] IPAContext &context,
return;
params->others.bls_config.enable_auto = 0;
- params->others.bls_config.fixed_val.r = blackLevelRed_;
- params->others.bls_config.fixed_val.gr = blackLevelGreenR_;
- params->others.bls_config.fixed_val.gb = blackLevelGreenB_;
- params->others.bls_config.fixed_val.b = blackLevelBlue_;
+ /* The rkisp1 uses 12bit based black levels. Scale down accordingly. */
+ params->others.bls_config.fixed_val.r = blackLevelRed_ >> 4;
+ params->others.bls_config.fixed_val.gr = blackLevelGreenR_ >> 4;
+ params->others.bls_config.fixed_val.gb = blackLevelGreenB_ >> 4;
+ params->others.bls_config.fixed_val.b = blackLevelBlue_ >> 4;
params->module_en_update |= RKISP1_CIF_ISP_MODULE_BLS;
params->module_ens |= RKISP1_CIF_ISP_MODULE_BLS;