Framework to manage controls related to an object. More...
#include <assert.h>#include <optional>#include <set>#include <stdint.h>#include <string>#include <unordered_map>#include <vector>#include <libcamera/base/class.h>#include <libcamera/base/span.h>#include <libcamera/geometry.h>
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Classes | |
| class | libcamera::ControlValue |
| Abstract type representing the value of a control. More... | |
| class | libcamera::ControlId |
| Control static metadata. More... | |
| class | libcamera::Control< T > |
| Describe a control and its intrinsic properties. More... | |
| class | libcamera::ControlInfo |
| Describe the limits of valid values for a Control. More... | |
| class | libcamera::ControlInfoMap |
| A map of ControlId to ControlInfo. More... | |
| class | libcamera::ControlList |
| Associate a list of ControlId with their values for an object. More... | |
Namespaces | |
| libcamera | |
| Top-level libcamera namespace. | |
Typedefs | |
| using | libcamera::ControlIdMap = std::unordered_map< unsigned int, const ControlId * > |
| A map of numerical control ID to ControlId. More... | |
Enumerations | |
| enum | libcamera::ControlType { libcamera::ControlTypeNone, libcamera::ControlTypeBool, libcamera::ControlTypeByte, libcamera::ControlTypeInteger32, libcamera::ControlTypeInteger64, libcamera::ControlTypeFloat, libcamera::ControlTypeString, ControlTypeRectangle, ControlTypeSize } |
| Define the data type of a Control. More... | |
Detailed Description
Framework to manage controls related to an object.
A control is a mean to govern or influence the operation of an object, and in particular of a camera. Every control is defined by a unique numerical ID, a name string and the data type of the value it stores. The libcamera API defines a set of standard controls in the libcamera::controls namespace, as a set of instances of the Control class.
The main way for applications to interact with controls is through the ControlList stored in the Request class:
Request *req = ...;
ControlList &controls = req->controls();
controls->set(controls::AwbEnable, false);
controls->set(controls::ManualExposure, 1000);
...
int32_t exposure = controls->get(controls::ManualExposure);
The ControlList::get() and ControlList::set() functions automatically deduce the data type based on the control.
