ICrowdEstimator.h

#pragma once

#include <fsdk/Def.h>
#include <fsdk/FSDKError.h>
#include <fsdk/IRefCounted.h>
#include <fsdk/Types/Image.h>
#include <fsdk/Types/Ref.h>
#include <fsdk/Types/Result.h>
#include <fsdk/Types/Span.h>

namespace fsdk {

#ifndef DOXYGEN_SHOULD_SKIP_THIS
    DECLARE_SMARTPTR(ICrowdEstimator);
#endif

    enum CrowdEstimatorType {
        CET_DEFAULT = 0,         
        CET_SINGLE_NET = 1,      
        CET_TWO_NETS = 2,        
        CET_COUNT
    };

    struct CrowdEstimation {
        size_t count; 
    };

    struct ICrowdEstimator : IRefCounted {
        virtual Result<FSDKError>
        estimate(
            const Image& image,
            const Rect& rect,
            CrowdEstimation& estimation) const noexcept = 0;

        virtual Result<FSDKError>
        estimate(
            Span<const Image> images,
            Span<const Rect> rects,
            Span<CrowdEstimation> estimations) const noexcept = 0;

        virtual Result<FSDKError>
        validate(
            Span<const Image> images,
            Span<const Rect> rects,
            Span<Result<FSDKError>> errors) const noexcept = 0;

        virtual CrowdEstimatorType 
        getType() const noexcept = 0;
    };
} // namespace fsdk