mirror of
https://github.com/Xaymar/obs-StreamFX
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fddf21b8de
While the previous approach of a static thread pool worked, it was sub-optimal in its resource usage. Many of the threads would never see a single task, and simply permanently sleep. This seems like a good idea, except that sleeping threads still end up in the scheduler, and thus waste a tiny amount of resources. It is better to instead dynamically spawn threads when needed and only keeping the bare minimum around all the time. These dynamically spawned threads are also explicitly set to background priority which further reduces scheduling overhead. Finally optimizing the memory layout to prevent unwanted false sharing should also keep sporadic wake ups at a minimum. This new model should be able to handle many more tasks than ever before, but is still not as optimal as it could be.
134 lines
5.2 KiB
C++
134 lines
5.2 KiB
C++
// Copyright (c) 2020 Michael Fabian Dirks <info@xaymar.com>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#pragma once
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#include "obs/gs/gs-effect.hpp"
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#include "obs/gs/gs-rendertarget.hpp"
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#include "obs/gs/gs-texture.hpp"
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#include "obs/obs-source-factory.hpp"
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#include "plugin.hpp"
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#include "util/util-threadpool.hpp"
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#include "warning-disable.hpp"
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#include <atomic>
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#include <memory>
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#include <mutex>
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#include "warning-enable.hpp"
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#ifdef ENABLE_FILTER_VIRTUAL_GREENSCREEN_NVIDIA
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#include "nvidia/vfx/nvidia-vfx-greenscreen.hpp"
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#endif
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namespace streamfx::filter::virtual_greenscreen {
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enum class virtual_greenscreen_provider {
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INVALID = -1,
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AUTOMATIC = 0,
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NVIDIA_GREENSCREEN = 1,
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};
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const char* cstring(virtual_greenscreen_provider provider);
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std::string string(virtual_greenscreen_provider provider);
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class virtual_greenscreen_instance : public ::streamfx::obs::source_instance {
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std::pair<uint32_t, uint32_t> _size;
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std::atomic<virtual_greenscreen_provider> _provider;
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virtual_greenscreen_provider _provider_ui;
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std::atomic<bool> _provider_ready;
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std::mutex _provider_lock;
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std::shared_ptr<util::threadpool::task> _provider_task;
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std::shared_ptr<::streamfx::obs::gs::effect> _effect;
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std::shared_ptr<::streamfx::obs::gs::sampler> _channel0_sampler;
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std::shared_ptr<::streamfx::obs::gs::sampler> _channel1_sampler;
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std::shared_ptr<::streamfx::obs::gs::rendertarget> _input;
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std::shared_ptr<::streamfx::obs::gs::texture> _output_color;
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std::shared_ptr<::streamfx::obs::gs::texture> _output_alpha;
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bool _dirty;
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#ifdef ENABLE_FILTER_VIRTUAL_GREENSCREEN_NVIDIA
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std::shared_ptr<::streamfx::nvidia::vfx::greenscreen> _nvidia_fx;
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#endif
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public:
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virtual_greenscreen_instance(obs_data_t* data, obs_source_t* self);
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~virtual_greenscreen_instance() override;
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void load(obs_data_t* data) override;
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void migrate(obs_data_t* data, uint64_t version) override;
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void update(obs_data_t* data) override;
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void properties(obs_properties_t* properties);
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uint32_t get_width() override;
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uint32_t get_height() override;
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void video_tick(float_t time) override;
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void video_render(gs_effect_t* effect) override;
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private:
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void switch_provider(virtual_greenscreen_provider provider);
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void task_switch_provider(util::threadpool::task_data_t data);
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#ifdef ENABLE_FILTER_VIRTUAL_GREENSCREEN_NVIDIA
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void nvvfxgs_load();
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void nvvfxgs_unload();
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void nvvfxgs_size();
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void nvvfxgs_process(std::shared_ptr<::streamfx::obs::gs::texture>& color,
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std::shared_ptr<::streamfx::obs::gs::texture>& alpha);
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void nvvfxgs_properties(obs_properties_t* props);
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void nvvfxgs_update(obs_data_t* data);
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#endif
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};
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class virtual_greenscreen_factory : public ::streamfx::obs::source_factory<
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::streamfx::filter::virtual_greenscreen::virtual_greenscreen_factory,
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::streamfx::filter::virtual_greenscreen::virtual_greenscreen_instance> {
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#ifdef ENABLE_FILTER_VIRTUAL_GREENSCREEN_NVIDIA
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bool _nvidia_available;
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std::shared_ptr<::streamfx::nvidia::cuda::obs> _nvcuda;
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std::shared_ptr<::streamfx::nvidia::cv::cv> _nvcvi;
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std::shared_ptr<::streamfx::nvidia::vfx::vfx> _nvvfx;
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#endif
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public:
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virtual ~virtual_greenscreen_factory();
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virtual_greenscreen_factory();
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virtual const char* get_name() override;
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virtual void get_defaults2(obs_data_t* data) override;
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virtual obs_properties_t* get_properties2(virtual_greenscreen_instance* data) override;
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#ifdef ENABLE_FRONTEND
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static bool on_manual_open(obs_properties_t* props, obs_property_t* property, void* data);
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#endif
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bool is_provider_available(virtual_greenscreen_provider);
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virtual_greenscreen_provider find_ideal_provider();
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public: // Singleton
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static void initialize();
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static void finalize();
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static std::shared_ptr<::streamfx::filter::virtual_greenscreen::virtual_greenscreen_factory> get();
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};
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} // namespace streamfx::filter::virtual_greenscreen
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