29c09e3ab6
Inject a specialization of std::hash<> for the V4L2PixelFormat class in the std namespace to make it possible to store instances of the class in the std::unordered_map and std::unordered_set containers. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Signed-off-by: Jacopo Mondi <jacopo@jmondi.org> Tested-by: Paul Elder <paul.elder@ideasonboard.com>
71 lines
1.2 KiB
C++
71 lines
1.2 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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* Copyright (C) 2020, Raspberry Pi Ltd
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*
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* v4l2_pixelformat.h - V4L2 Pixel Format
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*/
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#pragma once
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#include <functional>
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#include <ostream>
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#include <stdint.h>
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#include <string>
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#include <vector>
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#include <linux/videodev2.h>
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#include <libcamera/pixel_format.h>
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namespace libcamera {
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class V4L2PixelFormat
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{
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public:
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struct Info {
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PixelFormat format;
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const char *description;
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};
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V4L2PixelFormat()
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: fourcc_(0)
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{
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}
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explicit V4L2PixelFormat(uint32_t fourcc)
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: fourcc_(fourcc)
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{
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}
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bool isValid() const { return fourcc_ != 0; }
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uint32_t fourcc() const { return fourcc_; }
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operator uint32_t() const { return fourcc_; }
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std::string toString() const;
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const char *description() const;
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PixelFormat toPixelFormat() const;
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static const std::vector<V4L2PixelFormat> &
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fromPixelFormat(const PixelFormat &pixelFormat);
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private:
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uint32_t fourcc_;
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};
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std::ostream &operator<<(std::ostream &out, const V4L2PixelFormat &f);
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} /* namespace libcamera */
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namespace std {
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template<>
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struct hash<libcamera::V4L2PixelFormat> {
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size_t operator()(libcamera::V4L2PixelFormat const &format) const noexcept
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{
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return format.fourcc();
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}
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};
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} /* namespace std */
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