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//
// PluginVst2xLinux.c - MrsWatson
// Created by Nik Reiman on 13 May 13.
// Copyright (c) 2013 Teragon Audio. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
#if LINUX
#define VST_FORCE_DEPRECATED 0
#include "aeffectx.h"
extern "C" {
#include <dlfcn.h>
#include <stdlib.h>
#include "base/CharString.h"
#include "base/LinkedList.h"
#include "logging/EventLogger.h"
#include "plugin/PluginVst2xHostCallback.h"
LinkedList getVst2xPluginLocations(CharString currentDirectory)
{
LinkedList locations = newLinkedList();
CharString locationBuffer;
char *vstPathEnv;
linkedListAppend(locations, currentDirectory);
locationBuffer = newCharString();
snprintf(locationBuffer->data, (size_t)(locationBuffer->capacity), "%s/.vst", getenv("HOME"));
linkedListAppend(locations, locationBuffer);
locationBuffer = newCharString();
vstPathEnv = getenv("VST_PATH");
if (vstPathEnv != NULL) {
snprintf(locationBuffer->data, (size_t)(locationBuffer->capacity), "%s", vstPathEnv);
linkedListAppend(locations, locationBuffer);
} else {
freeCharString(locationBuffer);
}
return locations;
}
LibraryHandle getLibraryHandleForPlugin(const CharString pluginAbsolutePath)
{
void *libraryHandle = dlopen(pluginAbsolutePath->data, RTLD_NOW | RTLD_LOCAL);
if (libraryHandle == NULL) {
logError("Could not open library, %s", dlerror());
return NULL;
}
return libraryHandle;
}
AEffect *loadVst2xPlugin(LibraryHandle libraryHandle)
{
// Somewhat cheap hack to avoid a tricky compiler warning. Casting from void* to a proper function
// pointer will cause GCC to warn that "ISO C++ forbids casting between pointer-to-function and
// pointer-to-object". Here, we represent both types in a union and use the correct one in the given
// context, thus avoiding the need to cast anything.
// See also: http://stackoverflow.com/a/2742234/14302
union {
Vst2xPluginEntryFunc entryPointFuncPtr;
void *entryPointVoidPtr;
} entryPoint;
entryPoint.entryPointVoidPtr = dlsym(libraryHandle, "VSTPluginMain");
if (entryPoint.entryPointVoidPtr == NULL) {
entryPoint.entryPointVoidPtr = dlsym(libraryHandle, "main");
if (entryPoint.entryPointVoidPtr == NULL) {
logError("Couldn't get a pointer to plugin's main()");
return NULL;
}
}
Vst2xPluginEntryFunc mainEntryPoint = entryPoint.entryPointFuncPtr;
AEffect *plugin = mainEntryPoint(pluginVst2xHostCallback);
return plugin;
}
void closeLibraryHandle(LibraryHandle libraryHandle)
{
if (dlclose(libraryHandle) != 0) {
logWarn("Could not safely close plugin, possible resource leak");
}
}
} // extern "C"
#endif
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