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https://git.libcamera.org/libcamera/libcamera.git
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bab8b01895
Add libcamera V4L2 control support, implemented using the V4L2 Extended Control APIs. This patch defines the types used to create and manage controls. Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
80 lines
1.7 KiB
C++
80 lines
1.7 KiB
C++
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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/*
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* Copyright (C) 2019, Google Inc.
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*
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* v4l2_controls.h - V4L2 Controls Support
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*/
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#ifndef __LIBCAMERA_V4L2_CONTROLS_H__
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#define __LIBCAMERA_V4L2_CONTROLS_H__
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#include <string>
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#include <vector>
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#include <stdint.h>
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#include <linux/v4l2-controls.h>
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#include <linux/videodev2.h>
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namespace libcamera {
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class V4L2ControlInfo
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{
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public:
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V4L2ControlInfo(const struct v4l2_query_ext_ctrl &ctrl);
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unsigned int id() const { return id_; }
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unsigned int type() const { return type_; }
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size_t size() const { return size_; }
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const std::string &name() const { return name_; }
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private:
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unsigned int id_;
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unsigned int type_;
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size_t size_;
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std::string name_;
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};
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class V4L2Control
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{
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public:
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V4L2Control(unsigned int id, int value = 0)
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: id_(id), value_(value) {}
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int64_t value() const { return value_; }
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void setValue(int64_t value) { value_ = value; }
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unsigned int id() const { return id_; }
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private:
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unsigned int id_;
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int64_t value_;
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};
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class V4L2ControlList
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{
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public:
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using iterator = std::vector<V4L2Control>::iterator;
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using const_iterator = std::vector<V4L2Control>::const_iterator;
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iterator begin() { return controls_.begin(); }
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const_iterator begin() const { return controls_.begin(); }
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iterator end() { return controls_.end(); }
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const_iterator end() const { return controls_.end(); }
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bool empty() const { return controls_.empty(); }
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std::size_t size() const { return controls_.size(); }
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void clear() { controls_.clear(); }
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void add(unsigned int id, int64_t value = 0);
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V4L2Control *getByIndex(unsigned int index);
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V4L2Control *operator[](unsigned int id);
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private:
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std::vector<V4L2Control> controls_;
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};
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} /* namespace libcamera */
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#endif /* __LIBCAMERA_V4L2_CONTROLS_H__ */
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