libcamera/vivid.git - libcamera pipeline handler for VIVID

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/* SPDX-License-Identifier: LGPL-2.1-or-later */ /* * Copyright (C) 2019, Google Inc. * * Common base for V4L2 video devices and subdevices */ #pragma once #include <map> #include <memory> #include <optional> #include <vector> #include <linux/videodev2.h> #include <libcamera/base/log.h> #include <libcamera/base/signal.h> #include <libcamera/base/span.h> #include <libcamera/base/unique_fd.h> #include <libcamera/color_space.h> #include <libcamera/controls.h> #include "libcamera/internal/formats.h" namespace libcamera { class EventNotifier; class V4L2Device : protected Loggable { public: void close(); bool isOpen() const { return fd_.isValid(); } const ControlInfoMap &controls() const { return controls_; } ControlList getControls(const std::vector<uint32_t> &ids); int setControls(ControlList *ctrls); const struct v4l2_query_ext_ctrl *controlInfo(uint32_t id) const; const std::string &deviceNode() const { return deviceNode_; } std::string devicePath() const; int setFrameStartEnabled(bool enable); Signal<uint32_t> frameStart; void updateControlInfo(); protected: V4L2Device(const std::string &deviceNode); ~V4L2Device(); int open(unsigned int flags); int setFd(UniqueFD fd); int ioctl(unsigned long request, void *argp); int fd() const { return fd_.get(); } template<typename T> static std::optional<ColorSpace> toColorSpace(const T &v4l2Format, PixelFormatInfo::ColourEncoding colourEncoding); template<typename T> static int fromColorSpace(const std::optional<ColorSpace> &colorSpace, T &v4l2Format); private: static ControlType v4l2CtrlType(uint32_t ctrlType); static std::unique_ptr<ControlId> v4l2ControlId(const v4l2_query_ext_ctrl &ctrl); std::optional<ControlInfo> v4l2ControlInfo(const v4l2_query_ext_ctrl &ctrl); std::optional<ControlInfo> v4l2MenuControlInfo(const v4l2_query_ext_ctrl &ctrl); void listControls(); void updateControls(ControlList *ctrls, Span<const v4l2_ext_control> v4l2Ctrls); void eventAvailable(); std::map<unsigned int, struct v4l2_query_ext_ctrl> controlInfo_; std::vector<std::unique_ptr<ControlId>> controlIds_; ControlIdMap controlIdMap_; ControlInfoMap controls_; std::string deviceNode_; UniqueFD fd_; EventNotifier *fdEventNotifier_; bool frameStartEnabled_; }; } /* namespace libcamera */


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