DynamicLibraryHelpers.h File Reference

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Macros
#define	GET_SYMBOL(name)   (lib.HasSymbol(#name) ? functions.name = reinterpret_cast<decltype(functions.name)>(lib.GetSymbol(#name)) : functions.name = nullptr)
	Does not require the named function to be found in the library. More...
#define	RESOLVE(name)   if (nullptr == GET_SYMBOL(name)) return false
	Requires the named function to be found in the library, else load fails. More...

Functions
bool	GetAVVersion (const wxDynamicLibrary &lib, const char *name, FFMPegVersion &version)

Macro Definition Documentation

GET_SYMBOL

#define GET_SYMBOL

(

name

)

(lib.HasSymbol(#name) ? functions.name = reinterpret_cast<decltype(functions.name)>(lib.GetSymbol(#name)) : functions.name = nullptr)

Does not require the named function to be found in the library.

Definition at line 17 of file DynamicLibraryHelpers.h.

RESOLVE

#define RESOLVE

(

name

)

if (nullptr == GET_SYMBOL(name)) return false

Requires the named function to be found in the library, else load fails.

Definition at line 19 of file DynamicLibraryHelpers.h.

Function Documentation

GetAVVersion()

bool GetAVVersion	(	const wxDynamicLibrary &	lib,
		const char *	name,
		FFMPegVersion &	version
	)

Definition at line 19 of file DynamicLibraryHelpers.cpp.

{
   GetVersionFn versionFn = reinterpret_cast<GetVersionFn>(lib.GetSymbol(name));
 
   if (nullptr == versionFn)
      return false;
 
   const unsigned fullVersion = versionFn();
 
   version.Major = (fullVersion >> 16) & 0xFF;
   version.Minor = (fullVersion >> 8) & 0xFF;
   version.Micro = fullVersion & 0xFF;
 
   return true;
}

References FFMPegVersion::Major, FFMPegVersion::Micro, FFMPegVersion::Minor, and name.

Referenced by LoadAVCodecFunctions(), LoadAVFormatFunctions(), and LoadAVUtilFunctions().

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