libcamera::ipa::ipu3::IPAFrameContext Struct Reference

Per-frame context for algorithms. More...

Public Attributes
struct {
uint32_t   exposure
double   gain
}	agc
	Context for the Automatic Gain Control algorithm. More...
struct {
struct {
double   red
double   green
double   blue
}   gains
double   temperatureK
}	awb
	Context for the Automatic White Balance algorithm.
struct {
uint32_t   exposure
double   gain
}	sensor
	Effective sensor values.
struct {
double   gamma
struct ipu3_uapi_gamma_corr_lut   gammaCorrection
}	toneMapping
	Context for ToneMapping and Gamma control.

Detailed Description

Per-frame context for algorithms.

The frame context stores data specific to a single frame processed by the IPA. Each frame processed by the IPA has a context associated with it, accessible through the IPAContext structure.

Todo:

Detail how to access contexts for a particular frame

Each of the fields in the frame context belongs to either a specific algorithm, or to the top-level IPA module. A field may be read by any algorithm, but should only be written by its owner.

Member Data Documentation

agc

libcamera::ipa::ipu3::IPAFrameContext::agc

Context for the Automatic Gain Control algorithm.

The exposure and gain determined are expected to be applied to the sensor at the earliest opportunity.

gain

sensor libcamera::ipa::ipu3::IPAFrameContext::gain

Analogue gain multiplier.

The gain should be adapted to the sensor specific gain code before applying.

gammaCorrection

toneMapping libcamera::ipa::ipu3::IPAFrameContext::gammaCorrection

Per-pixel tone mapping implemented as a LUT.

The LUT structure is defined by the IPU3 kernel interface. See <linux/intel-ipu3.h> struct ipu3_uapi_gamma_corr_lut for further details.

---

The documentation for this struct was generated from the following files:

• src/ipa/ipu3/ipa_context.h
• src/ipa/ipu3/ipa_context.cpp