source/plugin/carla-vst-export-bridged.cpp

   1 /*
   2  * Carla Native Plugins
   3  * Copyright (C) 2013-2022 Filipe Coelho <falktx@falktx.com>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of
   8  * the License, or any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * For a full copy of the GNU General Public License see the doc/GPL.txt file.
  16  */
  17
  18 #include "CarlaLibUtils.hpp"
  19 #include "vestige/vestige.h"
  20
  21 #ifdef __WINE__
  22   #error This file is not meant to be used by wine!
  23 #endif
  24 #ifndef CARLA_OS_WIN
  25   #error This file is only meant to be used by mingw compilers!
  26 #endif
  27 #ifndef CARLA_PLUGIN_SYNTH
  28   #error CARLA_PLUGIN_SYNTH undefined
  29 #endif
  30
  31 typedef const AEffect* (__cdecl *MainCallback)(audioMasterCallback);
  32
  33 static HINSTANCE currentModuleHandle = nullptr;
  34
  35 static HINSTANCE getCurrentModuleInstanceHandle() noexcept
  36 {
  37     if (currentModuleHandle == nullptr)
  38         currentModuleHandle = GetModuleHandleA(nullptr);
  39
  40     return currentModuleHandle;
  41 }
  42
  43 CARLA_PLUGIN_EXPORT
  44 BOOL WINAPI DllMain(HINSTANCE hInst, DWORD reason, LPVOID)
  45 {
  46     if (reason == DLL_PROCESS_ATTACH)
  47         currentModuleHandle = hInst;
  48     return 1;
  49 }
  50
  51 CARLA_PLUGIN_EXPORT __cdecl
  52 const AEffect* VSTPluginMain(audioMasterCallback audioMaster)
  53 {
  54     static MainCallback sCallback = nullptr;
  55
  56     if (sCallback == nullptr)
  57     {
  58         CHAR filename[MAX_PATH + 256];
  59         filename[0] = 0;
  60         GetModuleFileName(getCurrentModuleInstanceHandle(), filename, MAX_PATH + 256);
  61         strcat(filename, ".so");
  62
  63         carla_stdout("FILENAME: '%s'", filename);
  64         static const lib_t lib = lib_open(filename);
  65         if (lib == nullptr)
  66         {
  67             carla_stderr2("lib_open failed: %s", lib_error(filename));
  68             return nullptr;
  69         }
  70
  71         sCallback = lib_symbol<MainCallback>(lib, "VSTPluginMain");
  72     }
  73
  74     CARLA_SAFE_ASSERT_RETURN(sCallback != nullptr, nullptr);
  75     return sCallback(audioMaster);
  76 }