NekoCWD/libcamera
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libcamera: software_isp: Add manual exposure control

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Signed-off-by: Vasiliy Doylov <nekocwd@mainlining.org>
This commit is contained in:
Vasiliy Doylov 2025-05-21 21:24:09 +03:00
parent 8ad3af24e8
commit 9305cb267b
Signed by: NekoCWD
GPG key ID: B7BE22D44474A582
2 changed files with 14 additions and 2 deletions
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14
src/ipa/simple/algorithms/agc.cpp
View file

@ -46,6 +46,8 @@ int Agc::init(IPAContext &context,
{
context.ctrlMap[&controls::AeEnable] = ControlInfo(false, true, true);
context.ctrlMap[&controls::Brightness] = ControlInfo(0.0f, 2.0f, 1.0f);
context.ctrlMap[&controls::ExposureValue] = ControlInfo(0.0f, 0.5f, 1.0f);
return 0;
}
@ -65,6 +67,7 @@ void Agc::queueRequest(typename Module::Context &context,
{
const auto &brightness = controls.get(controls::Brightness);
const auto &ae_enabled = controls.get(controls::AeEnable);
const auto &exposure_value = controls.get(controls::ExposureValue);
if (brightness.has_value()) {
context.activeState.knobs.brightness = brightness;
LOG(IPASoftExposure, Debug) << "Setting brightness to " << brightness.value();
@ -73,6 +76,10 @@ void Agc::queueRequest(typename Module::Context &context,
context.activeState.knobs.ae_enabled = ae_enabled;
LOG(IPASoftExposure, Debug) << "Setting ae_enable to " << ae_enabled.value();
}
if (exposure_value.has_value()) {
context.activeState.knobs.exposure_value = exposure_value.value();
LOG(IPASoftExposure, Debug) << "Setting exposure value to " << exposure_value.value();
}
}
void Agc::updateExposure(IPAContext &context, IPAFrameContext &frameContext, double exposureMSV)
@ -140,13 +147,16 @@ void Agc::process(IPAContext &context,
ControlList &metadata)
{
const auto ae_enable = context.activeState.knobs.ae_enabled.value_or(true);
if (!ae_enable)
return;
if (!ae_enable)
frameContext.sensor.exposure = (int32_t)( context.activeState.knobs.exposure_value.value_or(0.5) * (context.configuration.agc.exposureMax - context.configuration.agc.exposureMin));
utils::Duration exposureTime =
context.configuration.agc.lineDuration * frameContext.sensor.exposure;
metadata.set(controls::ExposureTime, exposureTime.get<std::micro>());
metadata.set(controls::AnalogueGain, frameContext.sensor.gain);
LOG(IPASoftExposure, Debug) << "Setting exposure value to " << frameContext.sensor.exposure;
if (!ae_enable)
return;
/*
* Calculate Mean Sample Value (MSV) according to formula from:

2
src/ipa/simple/ipa_context.h
View file

@ -71,6 +71,8 @@ struct IPAActiveState {
std::optional<double> brightness;
/* 0..1 range, 1 = normal */
std::optional<bool> ae_enabled;
/* 0..1 range, 0.5 = normal */
std::optional<double> exposure_value;
/* 0..100 range, 50.0 = normal */
std::optional<double> focus_pos;
} knobs;