d522ad2549
The V4L2Device::controlInfo method simply returns a pointer to the v4l2_query_ext_ctrl structure for the given control, which has already been retrieved and stored. Signed-off-by: David Plowman <david.plowman@raspberrypi.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
64 lines
1.5 KiB
C++
64 lines
1.5 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_device.h - Common base for V4L2 video devices and subdevices
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*/
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#ifndef __LIBCAMERA_INTERNAL_V4L2_DEVICE_H__
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#define __LIBCAMERA_INTERNAL_V4L2_DEVICE_H__
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#include <map>
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#include <memory>
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#include <vector>
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#include <linux/videodev2.h>
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#include "libcamera/internal/log.h"
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#include "libcamera/internal/v4l2_controls.h"
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namespace libcamera {
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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_ != -1; }
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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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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(int fd);
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int ioctl(unsigned long request, void *argp);
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int fd() { return fd_; }
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private:
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void listControls();
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void updateControls(ControlList *ctrls,
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const struct v4l2_ext_control *v4l2Ctrls,
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unsigned int count);
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std::map<unsigned int, struct v4l2_query_ext_ctrl> controlInfo_;
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std::vector<std::unique_ptr<V4L2ControlId>> controlIds_;
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ControlInfoMap controls_;
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std::string deviceNode_;
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int fd_;
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};
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} /* namespace libcamera */
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#endif /* __LIBCAMERA_INTERNAL_V4L2_DEVICE_H__ */
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