143 lines
5.4 KiB
C++
143 lines
5.4 KiB
C++
#ifndef CONVERSION_UTILITIES_CONVERT_H
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#define CONVERSION_UTILITIES_CONVERT_H
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#include "./types.h"
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#include "../application/global.h"
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#if defined(__BYTE_ORDER__) && defined(__FLOAT_WORD_ORDER__)
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# if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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# define CONVERSION_UTILITIES_BYTE_ORDER_BIG_ENDIAN
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# elif __BYTE_ORDER__ == __ORDER_PDP_ENDIAN__
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# define CONVERSION_UTILITIES_BYTE_ORDER_MIDDLE_ENDIAN
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# elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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# define CONVERSION_UTILITIES_BYTE_ORDER_LITTLE_ENDIAN
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# endif
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# if __FLOAT_WORD_ORDER__ == __ORDER_BIG_ENDIAN__
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# define CONVERSION_UTILITIES_FLOAT_BYTE_ORDER_BIG_ENDIAN
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# elif __FLOAT_WORD_ORDER__ == __ORDER_PDP_ENDIAN__
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# define CONVERSION_UTILITIES_FLOAT_BYTE_ORDER_MIDDLE_ENDIAN
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# elif __FLOAT_WORD_ORDER__ == __ORDER_LITTLE_ENDIAN__
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# define CONVERSION_UTILITIES_FLOAT_BYTE_ORDER_LITTLE_ENDIAN
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# endif
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#elif defined(__i386) || defined(__i386__) || defined(_M_IX86) || defined(__x86_64) || defined(__x86_64__) || defined(__amd64) || defined(_M_X64) || defined(__LITTLE_ENDIAN__) || defined(_little_endian__) || defined(_LITTLE_ENDIAN) || defined(_WIN32_WCE) || defined(WINAPI_FAMILY)
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# define CONVERSION_UTILITIES_BYTE_ORDER_LITTLE_ENDIAN
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# define CONVERSION_UTILITIES_FLOAT_BYTE_ORDER_LITTLE_ENDIAN
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#elif defined(__MIPSEB__) || defined(__s390__) || defined(__BIG_ENDIAN__) || defined(_big_endian__) || defined(_BIG_ENDIAN)
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# define CONVERSION_UTILITIES_BYTE_ORDER_BIG_ENDIAN
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# define CONVERSION_UTILITIES_FLOAT_BYTE_ORDER_BIG_ENDIAN
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#else
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# error "Unable to determine byte order!"
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#endif
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#if defined(CONVERSION_UTILITIES_BYTE_ORDER_MIDDLE_ENDIAN)
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# error "Middle endian byte order is not supported!"
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#endif
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#if defined(CONVERSION_UTILITIES_FLOAT_BYTE_ORDER_MIDDLE_ENDIAN)
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# error "Middle endian byte order is not supported!"
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#endif
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/*!
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* \namespace ConversionUtilities
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* \brief Contains several functions providing conversions between different data types.
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*
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* binaryconversion.h declares functions which convert base data types to an array of bytes and vice versa.
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* stringconversion.h declares different functions around string conversion such as converting a number to a string and vice versa.
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*/
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namespace ConversionUtilities
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{
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/*!
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* \brief Encapsulates functions using the big endian byte order.
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* \sa <a href="http://en.wikipedia.org/wiki/Endianness">Endianness - Wikipedia</a>
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*/
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namespace BE {
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#if defined(CONVERSION_UTILITIES_BYTE_ORDER_LITTLE_ENDIAN)
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# define CONVERSION_UTILITIES_BINARY_CONVERSION_INTERNAL 0
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#elif defined(CONVERSION_UTILITIES_BYTE_ORDER_BIG_ENDIAN)
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# define CONVERSION_UTILITIES_BINARY_CONVERSION_INTERNAL 1
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#endif
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#include "./binaryconversionprivate.h"
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#undef CONVERSION_UTILITIES_BINARY_CONVERSION_INTERNAL
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}
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/*!
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* \brief Encapsulates functions using the little endian byte order.
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* \sa <a href="http://en.wikipedia.org/wiki/Endianness">Endianness - Wikipedia</a>
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*/
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namespace LE {
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#if defined(CONVERSION_UTILITIES_BYTE_ORDER_LITTLE_ENDIAN)
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# define CONVERSION_UTILITIES_BINARY_CONVERSION_INTERNAL 1
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#elif defined(CONVERSION_UTILITIES_BYTE_ORDER_BIG_ENDIAN)
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# define CONVERSION_UTILITIES_BINARY_CONVERSION_INTERNAL 0
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#endif
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#include "./binaryconversionprivate.h"
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#undef CONVERSION_UTILITIES_BINARY_CONVERSION_INTERNAL
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}
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/*!
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* \brief Returns the 8.8 fixed point representation converted from the specified 32-bit floating point number.
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*/
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LIB_EXPORT inline uint16 toFixed8(float32 float32value)
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{
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return static_cast<uint16>(float32value * 256.0f);
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}
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/*!
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* \brief Returns a 32-bit floating point number converted from the specified 8.8 fixed point representation.
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*/
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LIB_EXPORT inline float32 toFloat32(uint16 fixed8value)
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{
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return static_cast<float32>(fixed8value) / 256.0f;
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}
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/*!
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* \brief Returns the 16.16 fixed point representation converted from the specified 32-bit floating point number.
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*/
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LIB_EXPORT inline uint32 toFixed16(float32 float32value)
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{
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return static_cast<uint32>(float32value * 65536.0f);
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}
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/*!
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* \brief Returns a 32-bit floating point number converted from the specified 16.16 fixed point representation.
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*/
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LIB_EXPORT inline float32 toFloat32(uint32 fixed16value)
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{
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return static_cast<float32>(fixed16value) / 65536.0f;
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}
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/*!
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* \brief Returns a 32-bit synchsafe integer converted from a normal 32-bit integer.
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* \remarks Synchsafe integers appear in ID3 tags that are attached to an MP3 file.
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* \sa <a href="http://id3.org/id3v2.4.0-structure">ID3 tag version 2.4.0 - Main Structure</a>
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*/
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LIB_EXPORT inline uint32 toSynchsafeInt(uint32 normalInt)
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{
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return ((normalInt & 0x0000007fu) )
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| ((normalInt & 0x00003f80u) << 1)
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| ((normalInt & 0x001fc000u) << 2)
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| ((normalInt & 0x0fe00000u) << 3);
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}
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/*!
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* \brief Returns a normal 32-bit integer converted from a 32-bit synchsafe integer.
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* \remarks Synchsafe integers appear in ID3 tags that are attached to an MP3 file.
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* \sa <a href="http://id3.org/id3v2.4.0-structure">ID3 tag version 2.4.0 - Main Structure</a>
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*/
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LIB_EXPORT inline uint32 toNormalInt(uint32 synchsafeInt)
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{
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return ((synchsafeInt & 0x0000007fu) )
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| ((synchsafeInt & 0x00007f00u) >> 1)
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| ((synchsafeInt & 0x007f0000u) >> 2)
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| ((synchsafeInt & 0x7f000000u) >> 3);
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}
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}
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#endif // CONVERSION_UTILITIES_CONVERT_H
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