Dynamically load FFmpeg and libfdk-aac if available. (#6570)
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87
src/common/dynamic_library/dynamic_library.cpp
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87
src/common/dynamic_library/dynamic_library.cpp
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// Copyright 2023 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <fmt/format.h>
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#if defined(_WIN32)
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#include <windows.h>
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#else
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#include <dlfcn.h>
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#endif
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#include "dynamic_library.h"
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namespace DynamicLibrary {
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DynamicLibrary::DynamicLibrary(std::string_view name, int major, int minor) {
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auto full_name = GetLibraryName(name, major, minor);
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#if defined(_WIN32)
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handle = reinterpret_cast<void*>(LoadLibraryA(full_name.c_str()));
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if (!handle) {
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DWORD error_message_id = GetLastError();
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LPSTR message_buffer = nullptr;
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size_t size =
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FormatMessageA(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
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FORMAT_MESSAGE_IGNORE_INSERTS,
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nullptr, error_message_id, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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reinterpret_cast<LPSTR>(&message_buffer), 0, nullptr);
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std::string message(message_buffer, size);
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load_error = message;
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}
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#else
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handle = dlopen(full_name.c_str(), RTLD_LAZY);
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if (!handle) {
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load_error = dlerror();
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}
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#endif // defined(_WIN32)
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}
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DynamicLibrary::~DynamicLibrary() {
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if (handle) {
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#if defined(_WIN32)
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FreeLibrary(reinterpret_cast<HMODULE>(handle));
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#else
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dlclose(handle);
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#endif // defined(_WIN32)
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handle = nullptr;
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}
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}
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void* DynamicLibrary::GetRawSymbol(std::string_view name) {
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#if defined(_WIN32)
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return reinterpret_cast<void*>(GetProcAddress(reinterpret_cast<HMODULE>(handle), name.data()));
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#else
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return dlsym(handle, name.data());
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#endif // defined(_WIN32)
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}
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std::string DynamicLibrary::GetLibraryName(std::string_view name, int major, int minor) {
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#if defined(_WIN32)
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if (major >= 0 && minor >= 0) {
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return fmt::format("{}-{}-{}.dll", name, major, minor);
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} else if (major >= 0) {
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return fmt::format("{}-{}.dll", name, major);
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} else {
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return fmt::format("{}.dll", name);
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}
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#elif defined(__APPLE__)
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auto prefix = name.starts_with("lib") ? "" : "lib";
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if (major >= 0 && minor >= 0) {
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return fmt::format("{}{}.{}.{}.dylib", prefix, name, major, minor);
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} else if (major >= 0) {
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return fmt::format("{}{}.{}.dylib", prefix, name, major);
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} else {
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return fmt::format("{}{}.dylib", prefix, name);
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}
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#else
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auto prefix = name.starts_with("lib") ? "" : "lib";
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if (major >= 0 && minor >= 0) {
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return fmt::format("{}{}.so.{}.{}", prefix, name, major, minor);
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} else if (major >= 0) {
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return fmt::format("{}{}.so.{}", prefix, name, major);
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} else {
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return fmt::format("{}{}.so", prefix, name);
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}
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#endif
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}
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} // namespace DynamicLibrary
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