// Copyright 2018 Xiaomi, Inc.  All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef MACE_OPS_WINOGRAD_INVERSE_TRANSFORM_H_
#define MACE_OPS_WINOGRAD_INVERSE_TRANSFORM_H_

#include <memory>
#include <string>

#include "mace/core/operator.h"
#include "mace/kernels/activation.h"
#include "mace/kernels/winograd_transform.h"

namespace mace {
namespace ops {

template <DeviceType D, typename T>
class WinogradInverseTransformOp : public Operator<D, T> {
 public:
  WinogradInverseTransformOp(const OperatorDef &op_def, Workspace *ws)
      : Operator<D, T>(op_def, ws),
        functor_(OperatorBase::GetOptionalArg<int>("batch", 1),
                 OperatorBase::GetOptionalArg<int>("height", 0),
                 OperatorBase::GetOptionalArg<int>("width", 0),
                 kernels::StringToActivationType(
                     OperatorBase::GetOptionalArg<std::string>("activation",
                                                               "NOOP")),
                 OperatorBase::GetOptionalArg<float>("max_limit", 0.0f),
                 OperatorBase::GetOptionalArg<int>("wino_block_size", 2)) {}

  MaceStatus Run(StatsFuture *future) override {
    const Tensor *input_tensor = this->Input(INPUT);
    const Tensor *bias = this->InputSize() == 2 ? this->Input(BIAS) : nullptr;
    Tensor *output_tensor = this->Output(OUTPUT);
    return functor_(input_tensor, bias, output_tensor, future);
  }

 private:
  kernels::WinogradInverseTransformFunctor<D, T> functor_;

 protected:
  MACE_OP_INPUT_TAGS(INPUT, BIAS);
  MACE_OP_OUTPUT_TAGS(OUTPUT);
};

}  // namespace ops
}  // namespace mace

#endif  // MACE_OPS_WINOGRAD_INVERSE_TRANSFORM_H_
