video-pc/libs/Recorder/record_desktop_wgc.h

#pragma once

#include "../WGC/export.h"
#include "record_desktop.h"

#include <Windows.h>

namespace am {
class record_desktop_wgc : public record_desktop, public wgc_session::wgc_session_observer
{
    class wgc_session_module
    {
        using func_type_is_supported = bool (*)();
        using func_type_create_session = wgc_session *(*) ();

    public:
        wgc_session_module()
        {
            module_ = ::LoadLibraryA("WGC.dll");
            if (module_) {
                func_is_supported_ = (func_type_is_supported)::GetProcAddress(module_,
                                                                              "wgc_is_supported");
                func_create_session_
                    = (func_type_create_session)::GetProcAddress(module_, "wgc_create_session");
            }
        }
        ~wgc_session_module()
        {
            if (module_)
                ::FreeModule(module_);
        }

        bool is_supported() const { return func_create_session_ && func_is_supported_(); }

        wgc_session *create_session() const
        {
            if (!func_create_session_)
                return nullptr;

            return func_create_session_();
        }

    private:
        HMODULE module_ = nullptr;
        func_type_is_supported func_is_supported_ = nullptr;
        func_type_create_session func_create_session_ = nullptr;
    };

public:
    record_desktop_wgc();
    ~record_desktop_wgc();

    int init(const RECORD_DESKTOP_RECT &rect, const int fps) override;

    int start() override;
    int pause() override;
    int resume() override;
    int stop() override;

    void on_frame(const wgc_session::wgc_session_frame &frame) override;

protected:
    void clean_up() override;

private:
    wgc_session *session_ = nullptr;
    wgc_session_module module_;
};
} // namespace am