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#include "Interface.h"
#include "Log.h"
#include "MiscUtils.h"
#ifdef _WIN32
# ifndef NOMINMAX
# define NOMINMAX
# endif
# include <windows.h>
#elif defined(__APPLE__)
# include <CoreFoundation/CoreFoundation.h>
#else
# include <dlfcn.h>
#endif
#include <sstream>
/*///////////// IModule //////////////*/
// from VST3_SDK/pluginterfaces/base/fplatform.h
#ifdef _WIN32
#define PLUGIN_API __stdcall
#else
#define PLUGIN_API
#endif
#ifndef UNLOAD_MODULES
#define UNLOAD_MODULES 1
#endif
namespace vst {
#if defined(_WIN32)
class ModuleWin32 : public IModule {
public:
typedef bool (PLUGIN_API* InitFunc)();
typedef bool (PLUGIN_API* ExitFunc)();
ModuleWin32(const std::string& path){
handle_ = LoadLibraryW(widen(path).c_str());
if (!handle_){
throw Error(Error::ModuleError, errorMessage(GetLastError()));
}
// LOG_DEBUG("loaded Win32 library " << path);
}
~ModuleWin32(){
#if UNLOAD_MODULES
FreeLibrary(handle_);
#endif
}
bool init() override {
auto fn = getFnPtr<InitFunc>("InitDll");
return (!fn || fn()); // init is optional
}
bool exit() override {
auto fn = getFnPtr<ExitFunc>("ExitDll");
return (!fn || fn()); // exit is optional
}
void * doGetFnPtr(const char *name) const override {
return (void *)GetProcAddress(handle_, name);
}
private:
HMODULE handle_;
};
#elif defined(__APPLE__)
class ModuleApple : public IModule {
public:
typedef bool (PLUGIN_API *InitFunc) (CFBundleRef);
typedef bool (PLUGIN_API *ExitFunc) ();
ModuleApple(const std::string& path){
// Create a fullPath to the bundle
// kudos to http://teragonaudio.com/article/How-to-make-your-own-VST-host.html
int err = 0;
auto pluginPath = CFStringCreateWithCString(NULL, path.c_str(), kCFStringEncodingUTF8);
auto bundleUrl = CFURLCreateWithFileSystemPath(NULL, pluginPath, kCFURLPOSIXPathStyle, true);
if (pluginPath) {
CFRelease(pluginPath);
}
if (bundleUrl){
bundle_ = CFBundleCreate(NULL, bundleUrl); // Open the bundle
err = errno; // immediately catch possible error
CFRelease(bundleUrl);
} else {
throw Error(Error::ModuleError, "couldn't create bundle URL");
}
if (bundle_){
// force loading!
if (!CFBundleLoadExecutable(bundle_)){
err = errno;
throw Error(Error::ModuleError, err ? errorMessage(err) : "CFBundleLoadExecutable failed");
}
} else {
std::stringstream ss;
ss << "couldn't open bundle (" << errorMessage(err) << ")";
throw Error(Error::ModuleError, ss.str());
}
// LOG_DEBUG("loaded macOS bundle " << path);
}
~ModuleApple(){
#if UNLOAD_MODULES
CFRelease(bundle_);
#endif
}
bool init() override {
auto fn = getFnPtr<InitFunc>("bundleEntry");
return (fn && fn(bundle_)); // init is mandatory
}
bool exit() override {
auto fn = getFnPtr<ExitFunc>("bundleExit");
return (fn && fn()); // exit is mandatory
}
void * doGetFnPtr(const char *name) const override {
auto str = CFStringCreateWithCString(NULL, name, kCFStringEncodingUTF8);
auto fnPtr = CFBundleGetFunctionPointerForName(bundle_, str);
if (str) CFRelease(str);
return fnPtr;
}
private:
CFBundleRef bundle_;
};
#else
class ModuleSO : public IModule {
public:
typedef bool (PLUGIN_API* InitFunc) (void*);
typedef bool (PLUGIN_API* ExitFunc) ();
ModuleSO(const std::string& path){
handle_ = dlopen(path.c_str(), RTLD_NOW | RTLD_DEEPBIND);
if (!handle_) {
auto error = dlerror();
std::stringstream ss;
ss << (error ? error : "dlopen failed");
throw Error(Error::ModuleError, ss.str());
}
// LOG_DEBUG("loaded dynamic library " << path);
}
~ModuleSO(){
#if UNLOAD_MODULES
dlclose(handle_);
#endif
}
// NOTE: actually, init() and exit() should be mandatory but some plugins don't care...
bool init() override {
auto fn = getFnPtr<InitFunc>("ModuleEntry");
return (!fn || fn(handle_)); // init is optional
}
bool exit() override {
auto fn = getFnPtr<ExitFunc>("ModuleExit");
return (!fn || fn()); // exit is optional
}
void * doGetFnPtr(const char *name) const override {
return dlsym(handle_, name);
}
private:
void *handle_;
};
#endif
// exceptions can propogate from the Module's constructor!
std::unique_ptr<IModule> IModule::load(const std::string& path){
#if defined(_WIN32)
return std::make_unique<ModuleWin32>(path);
#elif defined __APPLE__
return std::make_unique<ModuleApple>(path);
#else
return std::make_unique<ModuleSO>(path);
#endif
}
} // vst
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