obs-StreamFX/source/filters/filter-blur.hpp

/*
 * Modern effects for a modern Streamer
 * Copyright (C) 2017-2018 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 <chrono>
#include <functional>
#include <list>
#include <map>
#include <memory>
#include "gfx/blur/gfx-blur-base.hpp"
#include "gfx/gfx-source-texture.hpp"
#include "obs/gs/gs-effect.hpp"
#include "obs/gs/gs-helper.hpp"
#include "obs/gs/gs-rendertarget.hpp"
#include "obs/gs/gs-texture.hpp"
#include "obs/obs-source-factory.hpp"
#include "plugin.hpp"

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

namespace filter {
	namespace blur {
		enum class mask_type : int64_t {
			Region,
			Image,
			Source,
		};

		class blur_instance : public obs::source_instance {
			// Effects
			gs::effect _effect_mask;

			// Input
			std::shared_ptr<gs::rendertarget> _source_rt;
			std::shared_ptr<gs::texture>      _source_texture;
			bool                              _source_rendered;

			// Rendering
			std::shared_ptr<gs::texture>      _output_texture;
			std::shared_ptr<gs::rendertarget> _output_rt;
			bool                              _output_rendered;

			// Blur
			std::shared_ptr<::gfx::blur::base> _blur;
			double_t                           _blur_size;
			double_t                           _blur_angle;
			std::pair<double_t, double_t>      _blur_center;
			bool                               _blur_step_scaling;
			std::pair<double_t, double_t>      _blur_step_scale;

			// Masking
			struct {
				bool      enabled;
				mask_type type;
				struct {
					float_t left;
					float_t top;
					float_t right;
					float_t bottom;
					float_t feather;
					float_t feather_shift;
					bool    invert;
				} region;
				struct {
					std::string                  path;
					std::string                  path_old;
					std::shared_ptr<gs::texture> texture;
				} image;
				struct {
					std::string                          name_old;
					std::string                          name;
					bool                                 is_scene;
					std::shared_ptr<gfx::source_texture> source_texture;
					std::shared_ptr<gs::texture>         texture;
				} source;
				struct {
					float_t r;
					float_t g;
					float_t b;
					float_t a;
				} color;
				float_t multiplier;
			} _mask;

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

			public:
			virtual void update(obs_data_t* settings) override;
			virtual void load(obs_data_t* settings) override;

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

			private:
			bool apply_mask_parameters(gs::effect effect, gs_texture_t* original_texture,
									   gs_texture_t* blurred_texture);
		};

		class blur_factory : public obs::source_factory<filter::blur::blur_factory, filter::blur::blur_instance> {
			static std::shared_ptr<filter::blur::blur_factory> factory_instance;

			public: // Singleton
			static void initialize()
			{
				factory_instance = std::make_shared<filter::blur::blur_factory>();
			}

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

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

			private:
			std::vector<std::string> _translation_cache;

			public:
			blur_factory();
			virtual ~blur_factory();

			virtual const char* get_name() override;

			virtual void get_defaults2(obs_data_t* settings) override;

			virtual obs_properties_t* get_properties2(filter::blur::blur_instance* data) override;

			std::string translate_string(const char* format, ...);
		};
	} // namespace blur
} // namespace filter