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ipa: raspberrypi: awb: Add GetConvergenceFrames method to AWB base class

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We add a GetConvergenceFrames method to the AwbAlgorithm class which
can be called when the AWB is started from scratch. It suggests how
many frames should be dropped before displaying any (while the AWB
converges).

The Raspberry Pi specific implementation makes this customisable from
the tuning file.

Signed-off-by: David Plowman <david.plowman@raspberrypi.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
David Plowman 2020-12-08 20:44:38 +00:00 • committed by Laurent Pinchart
parent 748f48a006
commit dbcf4d8247
3 changed files with 14 additions and 0 deletions
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1
src/ipa/raspberrypi/controller/awb_algorithm.hpp
View file

@ -15,6 +15,7 @@ class AwbAlgorithm : public Algorithm
public:
AwbAlgorithm(Controller *controller) : Algorithm(controller) {}
// An AWB algorithm must provide the following:
virtual unsigned int GetConvergenceFrames() const = 0;
virtual void SetMode(std::string const &mode_name) = 0;
virtual void SetManualGains(double manual_r, double manual_b) = 0;
};

11
src/ipa/raspberrypi/controller/rpi/awb.cpp
View file

@ -59,6 +59,7 @@ void AwbConfig::Read(boost::property_tree::ptree const &params)
bayes = params.get<int>("bayes", 1);
frame_period = params.get<uint16_t>("frame_period", 10);
startup_frames = params.get<uint16_t>("startup_frames", 10);
convergence_frames = params.get<unsigned int>("convergence_frames", 3);
speed = params.get<double>("speed", 0.05);
if (params.get_child_optional("ct_curve"))
read_ct_curve(ct_r, ct_b, params.get_child("ct_curve"));
@ -165,6 +166,16 @@ void Awb::Initialise()
prev_sync_results_ = sync_results_;
}
unsigned int Awb::GetConvergenceFrames() const
{
// If colour gains have been explicitly set, there is no convergence
// to happen, so no need to drop any frames - return zero.
if (manual_r_ && manual_b_)
return 0;
else
return config_.convergence_frames;
}
void Awb::SetMode(std::string const &mode_name)
{
std::unique_lock<std::mutex> lock(settings_mutex_);

2
src/ipa/raspberrypi/controller/rpi/awb.hpp
View file

@ -37,6 +37,7 @@ struct AwbConfig {
uint16_t frame_period;
// number of initial frames for which speed taken as 1.0 (maximum)
uint16_t startup_frames;
unsigned int convergence_frames; // approx number of frames to converge
double speed; // IIR filter speed applied to algorithm results
bool fast; // "fast" mode uses a 16x16 rather than 32x32 grid
Pwl ct_r; // function maps CT to r (= R/G)
@ -82,6 +83,7 @@ public:
char const *Name() const override;
void Initialise() override;
void Read(boost::property_tree::ptree const &params) override;
unsigned int GetConvergenceFrames() const override;
void SetMode(std::string const &name) override;
void SetManualGains(double manual_r, double manual_b) override;
void SwitchMode(CameraMode const &camera_mode, Metadata *metadata) override;