cam_list.cpp

#include <iostream>
#include <unistd.h>

#include <libcamera/camera.h>
#include <libcamera/camera_manager.h>
#include <libcamera/property_ids.h>

using namespace libcamera;

std::string cameraName(const ControlList &props, const std::string cam_id) {
    bool addModel = true;
    std::string name;

    /*
	 * Construct the name from the camera location, model and ID. The model
	 * is only used if the location isn't present or is set to External.
	 */
    const auto &location = props.get(properties::Location);
    if (location) {
        switch (*location) {
            case properties::CameraLocationFront:
                addModel = false;
                name = "Internal front camera ";
                break;
            case properties::CameraLocationBack:
                addModel = false;
                name = "Internal back camera ";
                break;
            case properties::CameraLocationExternal:
                name = "External camera ";
                break;
        }
    }

    if (addModel) {
        /*
		 * If the camera location is not availble use the camera model
		 * to build the camera name.
		 */
        const auto &model = props.get(properties::Model);
        if (model)
            name = "'" + *model + "' ";
    }

    name += "(" + cam_id + ")";

    return name;
}

int main(int ac, char *av[]) {
    auto cm = std::make_unique<CameraManager>();
    int ret = cm->start();
    if (ret) {
        std::cerr << "libcamera::CameraManager failed to start, code " << std::to_string(-ret) << "\n";
        return ret;
    }

    auto cams = cm->cameras();

    std::cout << "Found " << cams.size() << " cameras.\n";

    unsigned int index = 1;
    for (const std::shared_ptr<libcamera::Camera> &cam : cams) {
        const Camera *camera = cam.get();
        const ControlList &props = cam->properties();

        std::cout << index << ": " << cameraName(props, camera->id()) << std::endl;

        ControlList::const_iterator prop;

        for (prop = props.begin(); prop != props.end(); prop++) {
            const auto id = prop->first;
            const auto value = prop->second;
            const auto ctrl = properties::properties.at(id);

            std::cout << "    " << ctrl->name() << ": " << value.toString() << std::endl;
        }

        index++;
    }

    cm->stop();
    sleep(1);
    return 0;
}