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52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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#ifndef HELPER_FUNCTIONS_HPP
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#define HELPER_FUNCTIONS_HPP
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#include <string>
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#include "basicio.hpp"
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#include "types.hpp"
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/*!
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@brief Convert a (potentially not null terminated) array into a
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std::string.
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Convert a C style string that may or may not be null terminated safely
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into a std::string. The string's termination is either set at the first \0
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or after data_length characters.
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@param[in] data A c-string from which the std::string shall be
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constructed. Does not need to be null terminated.
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@param[in] data_length An upper bound for the string length (must be at most
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the allocated length of `buffer`). If no null terminator is found in data,
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then the resulting std::string will be null terminated at `data_length`.
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*/
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std::string string_from_unterminated(const char* data, size_t data_length);
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namespace Exiv2 {
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static constexpr size_t BYTE = 0x1;
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static constexpr size_t WCHAR = 0x2;
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static constexpr size_t WORD = 0X2;
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static constexpr size_t DWORD = 0x4;
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static constexpr size_t QWORD = 0x8;
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static constexpr size_t GUID = 0x10;
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[[nodiscard]] uint64_t readQWORDTag(const Exiv2::BasicIo::UniquePtr& io);
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[[nodiscard]] uint32_t readDWORDTag(const Exiv2::BasicIo::UniquePtr& io);
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[[nodiscard]] uint16_t readWORDTag(const Exiv2::BasicIo::UniquePtr& io);
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[[nodiscard]] std::string readStringWcharTag(const Exiv2::BasicIo::UniquePtr& io, size_t length);
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[[nodiscard]] std::string readStringTag(const Exiv2::BasicIo::UniquePtr& io, size_t length = DWORD);
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/*!
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@brief Calculates Aspect Ratio of a video
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*/
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[[nodiscard]] std::string getAspectRatio(uint64_t width, uint64_t height);
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} // namespace Exiv2
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#endif // HELPER_FUNCTIONS_HPP
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