EntryPoint.hpp

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#pragma once
 
#include "vamp/vamp.h"
 
#include "rtvamp/pluginsdk/Plugin.hpp"
#include "rtvamp/pluginsdk/detail/PluginAdapter.hpp"
 
namespace rtvamp::pluginsdk {
 
template <detail::IsPlugin... Plugins>
class EntryPoint {
public:
    static constexpr const VampPluginDescriptor* getDescriptor(
        unsigned int version,
        unsigned int index
    ) {
        if (version < 1 || version > VAMP_API_VERSION) return {};
        if (index >= pluginCount) return {};
        return descriptors[index];
    }
 
private:
    static constexpr auto pluginCount = sizeof...(Plugins);
 
    static constexpr std::array<const VampPluginDescriptor*, pluginCount> descriptors{
        {detail::PluginAdapter<Plugins>::getDescriptor()...}
    };
};
 
}  // namespace rtvamp::pluginsdk
 
/* -------------------------------------------- Macro ------------------------------------------- */
 
#ifdef _MSC_VER
    #define RTVAMP_EXPORT_FUNCTION \
        __pragma(comment(linker, "/EXPORT:" __FUNCTION__"=" __FUNCDNAME__))
#else
    #define RTVAMP_EXPORT_FUNCTION
#endif
 
#define RTVAMP_ENTRY_POINT(...)                                                                    \
    extern "C" const VampPluginDescriptor* vampGetPluginDescriptor(                                \
        unsigned int hostApiVersion,                                                               \
        unsigned int index                                                                         \
    ) {                                                                                            \
        RTVAMP_EXPORT_FUNCTION                                                                     \
        return ::rtvamp::pluginsdk::EntryPoint<__VA_ARGS__>::getDescriptor(hostApiVersion, index); \
    }