b2eccef711
Add helper to check if frame start event are supported by subdevice. Since kernel does not have interface to query supported events use subscribe interface. Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> # v3 Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> # v5 Signed-off-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
96 lines
2.3 KiB
C++
96 lines
2.3 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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* Common base for V4L2 video devices and subdevices
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*/
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#pragma once
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#include <map>
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#include <memory>
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#include <optional>
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#include <stdint.h>
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#include <vector>
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#include <linux/videodev2.h>
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#include <libcamera/base/log.h>
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#include <libcamera/base/signal.h>
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#include <libcamera/base/span.h>
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#include <libcamera/base/unique_fd.h>
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#include <libcamera/color_space.h>
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#include <libcamera/controls.h>
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#include "libcamera/internal/formats.h"
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namespace libcamera {
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class EventNotifier;
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class V4L2Device : protected Loggable
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{
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public:
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void close();
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bool isOpen() const { return fd_.isValid(); }
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const ControlInfoMap &controls() const { return controls_; }
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ControlList getControls(const std::vector<uint32_t> &ids);
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int setControls(ControlList *ctrls);
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const struct v4l2_query_ext_ctrl *controlInfo(uint32_t id) const;
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const std::string &deviceNode() const { return deviceNode_; }
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std::string devicePath() const;
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bool supportsFrameStartEvent();
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int setFrameStartEnabled(bool enable);
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Signal<uint32_t> frameStart;
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void updateControlInfo();
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protected:
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V4L2Device(const std::string &deviceNode);
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~V4L2Device();
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int open(unsigned int flags);
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int setFd(UniqueFD fd);
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int ioctl(unsigned long request, void *argp);
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int fd() const { return fd_.get(); }
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template<typename T>
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static std::optional<ColorSpace> toColorSpace(const T &v4l2Format,
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PixelFormatInfo::ColourEncoding colourEncoding);
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template<typename T>
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static int fromColorSpace(const std::optional<ColorSpace> &colorSpace, T &v4l2Format);
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private:
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static ControlType v4l2CtrlType(uint32_t ctrlType);
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static std::unique_ptr<ControlId> v4l2ControlId(const v4l2_query_ext_ctrl &ctrl);
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std::optional<ControlInfo> v4l2ControlInfo(const v4l2_query_ext_ctrl &ctrl);
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std::optional<ControlInfo> v4l2MenuControlInfo(const v4l2_query_ext_ctrl &ctrl);
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void listControls();
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void updateControls(ControlList *ctrls,
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Span<const v4l2_ext_control> v4l2Ctrls);
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void eventAvailable();
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std::map<unsigned int, struct v4l2_query_ext_ctrl> controlInfo_;
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std::vector<std::unique_ptr<ControlId>> controlIds_;
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ControlIdMap controlIdMap_;
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ControlInfoMap controls_;
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std::string deviceNode_;
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UniqueFD fd_;
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EventNotifier *fdEventNotifier_;
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bool frameStartEnabled_;
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};
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} /* namespace libcamera */
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