Paul Davis
000609901b
This follows the letter sent from Waves Audio Ltd. to Paul Davis dated February 20th 2014 agreeing to release this code under the GNU Public License, version 2, with copyright owned by Waves Audio Ltd
214 lines
6.2 KiB
C++
214 lines
6.2 KiB
C++
/*
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Copyright (C) 2014 Waves Audio Ltd.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __WCFourCC_h__
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#define __WCFourCC_h__
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/* Copy to include
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#include "BasicTypes/WCFourCC.h"
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*/
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//#include "BasicTypes/WTByteOrder.h"
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#include "WCFixedString.h"
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// These are preprocessor macros rather than inline functions because most compilers can't
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// resolve functions at compile-time.
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#if _BYTEORDER_BIG_ENDIAN==1
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#define FOURCC_BIG(a, b, c, d) ((uint32_t(a)<<24)|(uint32_t(b)<<16)|(uint32_t(c)<< 8)|(uint32_t(d)<< 0))
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#define FOURCC_LITTLE(a, b, c, d) ((uint32_t(a)<< 0)|(uint32_t(b)<< 8)|(uint32_t(c)<<16)|(uint32_t(d)<<24))
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#define FOURCC_COMPILER(a, b, c, d) FOURCC_BIG(a,b,c,d)
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#elif _BYTEORDER_BIG_ENDIAN==0
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#define FOURCC_BIG(a, b, c, d) ((uint32_t(a)<< 0)|(uint32_t(b)<< 8)|(uint32_t(c)<<16)|(uint32_t(d)<<24))
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#define FOURCC_LITTLE(a, b, c, d) ((uint32_t(a)<<24)|(uint32_t(b)<<16)|(uint32_t(c)<< 8)|(uint32_t(d)<< 0))
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#define FOURCC_COMPILER(a, b, c, d) FOURCC_LITTLE(a,b,c,d)
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#else
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#error _BYTEORDER_BIG_ENDIAN not defined proparly
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#endif // _BYTEORDER_HPP_BIG_ENDIAN
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typedef uint32_t WTFourCharCode;
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#ifndef kEnableWCFourCCDebug
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#define kEnableWCFourCCDebug 0 // set to 1 to enable debug members
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#endif
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class WCFourCC
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{
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private:
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template<class _iter>
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static WTFourCharCode stored_from_iter(_iter& i)
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{
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return s_stored_byte_order==wvNS::wvBO::byte_order_big_endian ? FOURCC_BIG(i[0], i[1], i[2], i[3]) : FOURCC_LITTLE(i[0], i[1], i[2], i[3]);
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}
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public:
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// static const WCFourCC kDefaultFourCC_prv;
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static WCFourCC kDefaultFourCC_prv() { return WCFourCC(); }
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// change this line will change the byte order in which WCFourCC keeps the four char code
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static const wvNS::wvBO::byte_order_type s_stored_byte_order = wvNS::wvBO::compiler_byte_order;
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WCFourCC(const char a, const char b, const char c, const char d) :
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m_stored_value(s_stored_byte_order==wvNS::wvBO::compiler_byte_order ? FOURCC_BIG(a,b,c,d) : FOURCC_LITTLE(a,b,c,d))
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{
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#if kEnableWCFourCCDebug == 1
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m_c_str_stored_value[sizeof(WTFourCharCode)] = '\0';
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#endif
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}
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WCFourCC() :
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m_stored_value(FOURCC_BIG('?','?','?','?')) // since the four chars are the same, there is no need to choose between big & little
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{
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#if kEnableWCFourCCDebug == 1
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m_c_str_stored_value[sizeof(WTFourCharCode)] = '\0';
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#endif
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}
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WCFourCC(const WTFourCharCode in_fourCharCode, const wvNS::wvBO::byte_order_type in_byteOrder = wvNS::wvBO::compiler_byte_order) :
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m_stored_value(in_byteOrder==s_stored_byte_order ? in_fourCharCode : wvNS::wvBO::swap32(in_fourCharCode))
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{
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#if kEnableWCFourCCDebug == 1
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m_c_str_stored_value[sizeof(WTFourCharCode)] = '\0';
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#endif
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}
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explicit WCFourCC(const char* in_source_string) :
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m_stored_value(stored_from_iter(in_source_string))
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{
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#if kEnableWCFourCCDebug == 1
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m_c_str_stored_value[sizeof(WTFourCharCode)] = '\0';
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#endif
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}
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explicit WCFourCC(const WCFixedStringBase& in_source_string) :
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m_stored_value(stored_from_iter(in_source_string))
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{
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#if kEnableWCFourCCDebug == 1
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m_c_str_stored_value[sizeof(WTFourCharCode)] = '\0';
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#endif
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}
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WTFourCharCode GetAsSomeEndian(const wvNS::wvBO::byte_order_type in_byteOrder) const
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{
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return s_stored_byte_order==in_byteOrder ? m_stored_value : wvNS::wvBO::swap32(m_stored_value);
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}
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WTFourCharCode GetAsBigEndian() const
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{
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return s_stored_byte_order==wvNS::wvBO::byte_order_big_endian ? m_stored_value : wvNS::wvBO::swap32(m_stored_value);
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}
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WTFourCharCode GetAsLittleEndian() const
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{
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return s_stored_byte_order==wvNS::wvBO::byte_order_little_endian ? m_stored_value : wvNS::wvBO::swap32(m_stored_value);
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}
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WTFourCharCode GetAsCompilerEndian() const
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{
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return s_stored_byte_order==wvNS::wvBO::compiler_byte_order ? m_stored_value : wvNS::wvBO::swap32(m_stored_value);
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}
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WTFourCharCode GetAsStored() const
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{
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return m_stored_value;
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}
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char operator[](const unsigned int in_character_index) const
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{
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return char(m_stored_value >> (8 * (s_stored_byte_order==wvNS::wvBO::compiler_byte_order ? 3-in_character_index : in_character_index)));
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}
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char& operator[](const unsigned int in_character_index)
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{
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return reinterpret_cast<char*>(&m_stored_value)[s_stored_byte_order==wvNS::wvBO::byte_order_little_endian ? 3-in_character_index : in_character_index];
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}
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static size_t size()
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{
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return sizeof(WTFourCharCode);
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}
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static size_t max_size()
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{
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return size();
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}
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static size_t capacity()
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{
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return size();
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}
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WCFixedString4 GetString() const
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{
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WCFixedString4 retVal;
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retVal << operator[](0) << operator[](1) << operator[](2) << operator[](3);
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return retVal;
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}
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#if kEnableWCFourCCDebug == 1
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const char* c_str() const
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{
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return m_c_str_stored_value;
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}
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#endif
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protected:
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private:
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#if kEnableWCFourCCDebug == 1
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union
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{
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#endif
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WTFourCharCode m_stored_value;
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#if kEnableWCFourCCDebug == 1
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char m_c_str_stored_value[sizeof(WTFourCharCode)+1];
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};
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#endif
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WCFourCC& operator=(const WTFourCharCode); // we want initialization from literal to be dome through the constructor
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};
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inline bool operator<(const WCFourCC in_left, const WCFourCC in_right)
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{
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return in_left.GetAsSomeEndian(WCFourCC::s_stored_byte_order) < in_right.GetAsSomeEndian(WCFourCC::s_stored_byte_order);
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}
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inline bool operator==(const WCFourCC in_left, const WCFourCC in_right)
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{
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return in_left.GetAsSomeEndian(WCFourCC::s_stored_byte_order) == in_right.GetAsSomeEndian(WCFourCC::s_stored_byte_order);
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}
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inline bool operator!=(const WCFourCC in_left, const WCFourCC in_right)
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{
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return ! operator==(in_left, in_right);
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}
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#define kDefaultFourCC WCFourCC::kDefaultFourCC_prv()
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static const WCFourCC kZeroFourCC(0, wvNS::wvBO::compiler_byte_order);
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#endif //#if !defined(__WCFourCC_h__)
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