mirror of
https://github.com/Xaymar/obs-StreamFX
synced 2024-12-05 01:27:26 +00:00
d332007ae0
Changes applied: * Moved utility files to /util/. * Removed unused #includes. * Removed unused ::ffmpeg::tools function. * Removed unused variables. * Fixed missing parentheses in the version macro. * Fixed missing override on virtual function overrides and removed unnecessary virtual keyword from them. * Disabled additional warning for ATL headers on MSVC only. * Replaced direct printf parameters with their macro equivalent. * Replaced C-style casts with C++-style casts. * Applied clang-format again after an earlier change to the CMake file broke the integration for it.
174 lines
4.3 KiB
C++
174 lines
4.3 KiB
C++
/*
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* Modern effects for a modern Streamer
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* Copyright (C) 2017 Michael Fabian Dirks
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#pragma once
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#include "common.hpp"
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#include <functional>
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#include <list>
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#include <mutex>
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namespace util {
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template<typename... _args>
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class event {
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std::list<std::function<void(_args...)>> _listeners;
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std::recursive_mutex _lock;
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std::function<void()> _cb_fill;
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std::function<void()> _cb_clear;
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public /* constructor */:
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event() : _listeners(), _lock(), _cb_fill(), _cb_clear() {}
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virtual ~event()
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{
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std::lock_guard<std::recursive_mutex> lg(_lock);
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this->clear();
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}
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/* Copy Constructor */
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event(const event<_args...>&) = delete;
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/* Move Constructor */
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event(event<_args...>&& other) : event()
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{
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std::lock_guard<std::recursive_mutex> lg(_lock);
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std::lock_guard<std::recursive_mutex> lgo(other._lock);
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_listeners.swap(other._listeners);
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_cb_fill.swap(other._cb_fill);
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_cb_clear.swap(other._cb_clear);
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}
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public /* operators */:
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/* Copy Operator */
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event<_args...>& operator=(const event<_args...>&) = delete;
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/* Move Operator */
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event<_args...>& operator=(event<_args...>&& other)
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{
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std::lock_guard<std::recursive_mutex> lg(_lock);
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std::lock_guard<std::recursive_mutex> lgo(other._lock);
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_listeners.swap(other._listeners);
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_cb_fill.swap(other._cb_fill);
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_cb_clear.swap(other._cb_clear);
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return *this;
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}
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/** Call the event, going through all listeners in the order they were registered in.
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*/
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template<typename... _largs>
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inline void operator()(_args... args)
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{
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call<_largs...>(args...);
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}
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template<typename... _largs>
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inline void call(_args... args)
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{
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std::lock_guard<std::recursive_mutex> lg(_lock);
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for (auto& l : _listeners) {
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l(args...);
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}
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}
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public /* functions: listeners */:
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/** Add a new listener to the event.
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* @param listener A listener bound with std::bind or a std::function.
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*/
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inline void add(std::function<void(_args...)> listener)
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{
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std::lock_guard<std::recursive_mutex> lg(_lock);
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if (_listeners.size() == 0) {
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if (_cb_fill) {
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_cb_fill();
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}
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}
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_listeners.push_back(listener);
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}
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inline event<_args...>& operator+=(std::function<void(_args...)> listener)
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{
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this->add(listener);
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return *this;
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}
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/** Remove an existing listener from the event.
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* @param listener A listener bound with std::bind or a std::function.
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*/
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inline void remove(std::function<void(_args...)> listener)
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{
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std::lock_guard<std::recursive_mutex> lg(_lock);
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_listeners.remove(listener);
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if (_listeners.size() == 0) {
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if (_cb_clear) {
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_cb_clear();
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}
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}
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}
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inline event<_args...>& operator-=(std::function<void(_args...)> listener)
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{
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this->remove(listener);
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return *this;
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}
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/** Check if there are any listeners for the event.
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* @return bool `true` if there are none, otherwise `false`.
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*/
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inline bool empty()
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{
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std::lock_guard<std::recursive_mutex> lg(_lock);
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return _listeners.empty();
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}
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inline operator bool()
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{
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return !this->empty();
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}
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/** Clear the list of listeners for the event.
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*/
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inline void clear()
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{
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std::lock_guard<std::recursive_mutex> lg(_lock);
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_listeners.clear();
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if (_cb_clear) {
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_cb_clear();
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}
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}
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inline event<_args...>& operator=(std::nullptr_t)
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{
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clear();
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return *this;
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}
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public /* callbacks */:
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void set_listen_callback(std::function<void()> cb)
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{
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std::lock_guard<std::recursive_mutex> lg(_lock);
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this->_cb_fill = cb;
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}
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void set_silence_callback(std::function<void()> cb)
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{
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std::lock_guard<std::recursive_mutex> lg(_lock);
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this->_cb_clear = cb;
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}
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};
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} // namespace util
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