1 files changed, 126 insertions, 0 deletions
diff --git a/avmedia/source/vlc/wrapper/SymbolLoader.hxx b/avmedia/source/vlc/wrapper/SymbolLoader.hxx
new file mode 100644
index 000000000..64789b326
--- /dev/null
+++ b/avmedia/source/vlc/wrapper/SymbolLoader.hxx
@@ -0,0 +1,126 @@
+/* -*- 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/.
+ */
+
+#pragma once
+#if defined(_WIN32)
+#if !defined WIN32_LEAN_AND_MEAN
+# define WIN32_LEAN_AND_MEAN
+#endif
+# 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
+{
+    OUStringLiteral symName;
+    SymbolFunc *refValue;
+};
+
+#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( _WIN32 )
+    const char LibName[] = "libvlc.dll";
+
+    inline OUString GetVLCPath()
+    {
+        HKEY hKey;
+        sal_Unicode 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", nullptr, &dwType, reinterpret_cast<LPBYTE>(arCurrent), &dwCurrentSize ) == ERROR_SUCCESS &&
+                 dwType == REG_SZ )
+            {
+                ::RegCloseKey( hKey );
+                dwCurrentSize -= 2;
+                dwCurrentSize /= 2;
+
+                return OUString( arCurrent, dwCurrentSize ) + "\\";
+            }
+
+            ::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( 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( _WIN32 )
+        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;
+    }
+}
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */