dc443ec1b2
While the C++ allows the redefinition of operator= to return an arbitrary type, it is customary to return a reference to the assigned value type. Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
84 lines
1.8 KiB
C++
84 lines
1.8 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 - V4L2 Device
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*/
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#ifndef __LIBCAMERA_V4L2_DEVICE_H__
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#define __LIBCAMERA_V4L2_DEVICE_H__
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#include <string>
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#include <linux/videodev2.h>
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namespace libcamera {
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struct V4L2Capability final : v4l2_capability {
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const char *driver() const
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{
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return reinterpret_cast<const char *>(v4l2_capability::driver);
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}
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const char *card() const
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{
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return reinterpret_cast<const char *>(v4l2_capability::card);
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}
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const char *bus_info() const
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{
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return reinterpret_cast<const char *>(v4l2_capability::bus_info);
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}
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unsigned int device_caps() const
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{
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return capabilities & V4L2_CAP_DEVICE_CAPS
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? v4l2_capability::device_caps
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: v4l2_capability::capabilities;
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}
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bool isMultiplanar() const
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{
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return device_caps() & (V4L2_CAP_VIDEO_CAPTURE_MPLANE |
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V4L2_CAP_VIDEO_OUTPUT_MPLANE);
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}
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bool isCapture() const
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{
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return device_caps() & (V4L2_CAP_VIDEO_CAPTURE |
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V4L2_CAP_VIDEO_CAPTURE_MPLANE);
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}
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bool isOutput() const
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{
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return device_caps() & (V4L2_CAP_VIDEO_OUTPUT |
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V4L2_CAP_VIDEO_OUTPUT_MPLANE);
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}
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bool hasStreaming() const
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{
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return device_caps() & V4L2_CAP_STREAMING;
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}
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};
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class MediaEntity;
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class V4L2Device
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{
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public:
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explicit V4L2Device(const std::string &deviceNode);
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explicit V4L2Device(const MediaEntity &entity);
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V4L2Device(const V4L2Device &) = delete;
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~V4L2Device();
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V4L2Device &operator=(const V4L2Device &) = delete;
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int open();
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bool isOpen() const;
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void close();
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const char *driverName() const { return caps_.driver(); }
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const char *deviceName() const { return caps_.card(); }
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const char *busName() const { return caps_.bus_info(); }
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private:
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std::string deviceNode_;
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int fd_;
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V4L2Capability caps_;
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};
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} /* namespace libcamera */
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#endif /* __LIBCAMERA_V4L2_DEVICE_H__ */
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