//
//  CPUConvolutionDepthwise.hpp
//  MNN
//
//  Created by MNN on 2018/07/20.
//  Copyright © 2018, Alibaba Group Holding Limited
//

#ifndef CPUConvolutionDepthwise_hpp
#define CPUConvolutionDepthwise_hpp

#include "core/AutoStorage.h"
#include "backend/cpu/CPUConvolution.hpp"
#include "backend/cpu/compute/ConvolutionIntFactory.hpp"

namespace MNN {
class CPUConvolutionDepthwise {
public:
    class BasicFloatExecution : public CPUConvolution {
    public:
        BasicFloatExecution(const Convolution2DCommon *common, Backend *b) : CPUConvolution(common, b) {
        }
        virtual ~BasicFloatExecution() = default;
        virtual ErrorCode onExecute(const std::vector<Tensor *> &inputs, const std::vector<Tensor *> &outputs) override;
        virtual ErrorCode onResize(const std::vector<Tensor *> &inputs, const std::vector<Tensor *> &outputs) override;

    private:
        std::function<void(const uint8_t *, uint8_t *, int)> mExecutor;
        std::function<void(float* dst, const float* src, const float* weight, size_t width, size_t src_w_setup,
                           size_t fw, size_t fh, size_t dilateX_step, size_t dilateY_step, size_t height,
                           size_t srcHStep, size_t dstHStep)> mFastKernel;
        int mNumber = 1;
        std::shared_ptr<Tensor> mInputPad;
        bool mFastKernelApply = false;
    };
    class MultiInputFloatExecution : public BasicFloatExecution {
    public:
        MultiInputFloatExecution(const Convolution2DCommon *common, Backend *b) : BasicFloatExecution(common, b) {
        }
        virtual ~MultiInputFloatExecution() = default;
        virtual ErrorCode onResize(const std::vector<Tensor *> &inputs, const std::vector<Tensor *> &outputs) override;
        virtual ErrorCode onExecute(const std::vector<Tensor *> &inputs, const std::vector<Tensor *> &outputs) override;

    private:
        std::unique_ptr<Tensor> mWeight;
        std::unique_ptr<Tensor> mBias;
        std::vector<Tensor *> mTempInputs;
    };
    class FloatExecution : public CPUConvolution {
    public:
        FloatExecution(const Convolution2DCommon *common, Backend *b, const float *originWeight,
                       size_t originWeightSize, const float *bias, size_t biasSize);
        virtual ~FloatExecution();
        virtual ErrorCode onExecute(const std::vector<Tensor *> &inputs,
                                    const std::vector<Tensor *> &outputs) override {
            return mOrigin->onExecute(mTempInputs, outputs);
        }
        virtual ErrorCode onResize(const std::vector<Tensor *> &inputs, const std::vector<Tensor *> &outputs) override {
            mTempInputs = {inputs[0], mResource->mWeight.get(), mResource->mBias.get()};
            return mOrigin->onResize(mTempInputs, outputs);
        }
        virtual bool onClone(Backend* bn, const Op* op, Execution** dst) override;
    private:
        FloatExecution(std::shared_ptr<Resource> resource, const Convolution2DCommon* common, Backend* b) : CPUConvolution(common, b) {
            mResource = resource;
            mOrigin.reset(new BasicFloatExecution(common, b));
        }
        std::shared_ptr<CPUConvolution::Resource> mResource;
        std::vector<Tensor *> mTempInputs;
        std::unique_ptr<BasicFloatExecution> mOrigin;
    };
};
} // namespace MNN

#endif /* CPUConvolutionDepthwise_hpp */