office-gobmx/avmedia/source/vlc/wrapper/SymbolLoader.hxx
Noel Grandin 2087484c65 use consistent #define checks for the Windows platform
stage 2 of replacing usage of various checks for the windows platform
with the compiler-defined '_WIN32' macro

In this stage we focus on replacing usage of the WIN macro

Change-Id: Ie8a4a63198a6de96bd158ecd707dadafb9c8ea84
Reviewed-on: https://gerrit.libreoffice.org/22393
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
2016-02-17 11:33:57 +00:00

129 lines
3.4 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#ifndef INCLUDED_AVMEDIA_SOURCE_VLC_WRAPPER_SYMBOLLOADER_HXX
#define INCLUDED_AVMEDIA_SOURCE_VLC_WRAPPER_SYMBOLLOADER_HXX
#if defined(_WIN32)
# include <windows.h>
# include <winreg.h>
#endif
#include <osl/module.h>
#include <rtl/ustring.hxx>
#include <sal/log.hxx>
#define SYM_MAP(a) { #a, reinterpret_cast<SymbolFunc *>(&a) }
namespace avmedia
{
namespace vlc
{
namespace wrapper
{
typedef void (*SymbolFunc) (void);
struct ApiMap
{
const char *symName;
SymbolFunc *refValue;
};
namespace
{
#if defined( LINUX )
const char LibName[] = "libvlc.so.5";
#elif defined( MACOSX )
const char LibName[] = "/Applications/VLC.app/Contents/MacOS/lib/libvlc.dylib";
#elif defined( WNT )
const char LibName[] = "libvlc.dll";
OUString GetVLCPath()
{
HKEY hKey;
wchar_t arCurrent[MAX_PATH];
DWORD dwType, dwCurrentSize = sizeof( arCurrent );
//TODO: This one will work only with LibreOffice 32-bit + VLC 32-bit on Win x86_64.
const LONG errorCore = ::RegOpenKeyExW( HKEY_LOCAL_MACHINE, L"SOFTWARE\\Wow6432Node\\VideoLAN\\VLC", 0, KEY_READ | KEY_WOW64_64KEY, &hKey );
if ( errorCore == ERROR_SUCCESS )
{
if ( ::RegQueryValueExW( hKey, L"InstallDir", NULL, &dwType, (LPBYTE) arCurrent, &dwCurrentSize ) == ERROR_SUCCESS &&
dwType == REG_SZ )
{
::RegCloseKey( hKey );
dwCurrentSize -= 2;
dwCurrentSize /= 2;
return OUString( arCurrent, dwCurrentSize ) + OUString::createFromAscii("\\");
}
::RegCloseKey( hKey );
}
return OUString();
}
#endif
template<size_t N>
bool tryLink( oslModule &aModule, const ApiMap ( &pMap )[N] )
{
for (size_t i = 0; i < N; ++i)
{
SymbolFunc aMethod = reinterpret_cast<SymbolFunc>(osl_getFunctionSymbol
( aModule, OUString::createFromAscii( pMap[ i ].symName ).pData ));
if ( !aMethod )
{
SAL_WARN("avmedia", "Cannot load method " << pMap[ i ].symName);
*pMap[ i ].refValue = nullptr;
return false;
}
else
*pMap[ i ].refValue = aMethod;
}
return true;
}
}
template<size_t N>
bool InitApiMap( const ApiMap ( &pMap )[N] )
{
#if defined( LINUX ) || defined( MACOSX )
OUString const fullPath(LibName);
#elif defined( WNT )
OUString const fullPath(GetVLCPath() + LibName);
#endif
SAL_INFO("avmedia", fullPath);
oslModule aModule = osl_loadModule( fullPath.pData,
SAL_LOADMODULE_DEFAULT );
if( aModule == nullptr)
{
SAL_WARN("avmedia", "Cannot load libvlc");
return false;
}
if (tryLink( aModule, pMap ))
{
return true;
}
SAL_WARN("avmedia", "Cannot load libvlc");
osl_unloadModule( aModule );
return false;
}
}
}
}
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */