obs-StreamFX/source/sources/source-mirror.hpp

/*
* Modern effects for a modern Streamer
* Copyright (C) 2017 Michael Fabian Dirks
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
*/

#pragma once
#include <condition_variable>
#include <memory>
#include <mutex>
#include <queue>
#include <thread>
#include <vector>
#include "gfx/gfx-source-texture.hpp"
#include "obs/gs/gs-rendertarget.hpp"
#include "obs/gs/gs-sampler.hpp"
#include "obs/obs-source-factory.hpp"
#include "obs/obs-source.hpp"
#include "plugin.hpp"

// OBS
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4201)
#endif
#include <obs-source.h>
#ifdef _MSC_VER
#pragma warning(pop)
#endif

namespace source::mirror {
	struct mirror_audio_data {
		obs_source_audio                  audio = {};
		std::vector<std::vector<float_t>> data;
	};

	class mirror_instance : public obs::source_instance {
		// Source
		std::shared_ptr<obs::deprecated_source> _source;
		std::string                             _source_name;

		// Cached Data
		std::pair<uint32_t, uint32_t> _source_size;

		// Audio
		bool                                           _audio_enabled;
		speaker_layout                                 _audio_layout;
		std::condition_variable                        _audio_notify;
		std::thread                                    _audio_thread;
		bool                                           _audio_kill_thread;
		bool                                           _audio_have_output;
		std::mutex                                     _audio_lock_outputter;
		std::mutex                                     _audio_lock_capturer;
		std::queue<std::shared_ptr<mirror_audio_data>> _audio_data_queue;
		std::queue<std::shared_ptr<mirror_audio_data>> _audio_data_free_queue;

		// Scaling
		bool            _rescale_enabled;
		uint32_t        _rescale_width;
		uint32_t        _rescale_height;
		bool            _rescale_keep_orig_size;
		obs_scale_type  _rescale_type;
		obs_bounds_type _rescale_bounds;
		uint32_t        _rescale_alignment;

		// Caching
		bool                                 _cache_enabled;
		bool                                 _cache_rendered;
		std::shared_ptr<gfx::source_texture> _cache_renderer;
		std::shared_ptr<gs::texture>         _cache_texture;

		// Scene
		std::shared_ptr<obs_source_t>    _scene;
		std::shared_ptr<obs_sceneitem_t> _source_item;

		private:
		void release();
		void acquire(std::string source_name);

		public:
		mirror_instance(obs_data_t* settings, obs_source_t* self);
		virtual ~mirror_instance();

		virtual uint32_t get_width() override;
		virtual uint32_t get_height() override;

		virtual void update(obs_data_t*) override;
		virtual void load(obs_data_t*) override;
		virtual void save(obs_data_t*) override;

		virtual void video_tick(float) override;
		virtual void video_render(gs_effect_t*) override;

		virtual void enum_active_sources(obs_source_enum_proc_t, void*) override;
		virtual void enum_all_sources(obs_source_enum_proc_t, void*) override;

		void audio_output_cb() noexcept;

		void on_source_rename(obs::deprecated_source* source, std::string new_name, std::string old_name);
		void on_audio_data(obs::deprecated_source* source, const audio_data* audio, bool muted);
	};

	class mirror_factory : public obs::source_factory<source::mirror::mirror_factory, source::mirror::mirror_instance> {
		static std::shared_ptr<source::mirror::mirror_factory> factory_instance;

		public: // Singleton
		static void initialize()
		{
			factory_instance = std::make_shared<source::mirror::mirror_factory>();
		}

		static void finalize()
		{
			factory_instance.reset();
		}

		static std::shared_ptr<mirror_factory> get()
		{
			return factory_instance;
		}

		public:
		mirror_factory();
		virtual ~mirror_factory() override;

		virtual const char* get_name() override;

		virtual void get_defaults2(obs_data_t* data) override;

		virtual obs_properties_t* get_properties2(source::mirror::mirror_instance* data) override;
	};
} // namespace source::mirror