stump_func_op.h

#ifndef CAFFE2_FB_OPERATORS_UTILITY_OPS_H_
#define CAFFE2_FB_OPERATORS_UTILITY_OPS_H_

#include "caffe2/core/context.h"
#include "caffe2/core/operator.h"

namespace caffe2 {

// Converts each input element into either high_ or low_value
// based on the given threshold.
//
// out[i] = low_value if in[i] <= threshold else high_value
template <typename TIN, typename TOUT, class Context>
class StumpFuncOp final : public Operator<Context> {
 public:
  USE_OPERATOR_CONTEXT_FUNCTIONS;

  template <class... Args>
  explicit StumpFuncOp(Args&&... args)
      : Operator<Context>(std::forward<Args>(args)...),
        threshold_(this->template GetSingleArgument<TIN>("threshold", 0)),
        low_value_(this->template GetSingleArgument<TOUT>("low_value", 0)),
        high_value_(this->template GetSingleArgument<TOUT>("high_value", 0)) {}

  bool RunOnDevice() override;

 protected:
  TIN threshold_;
  TOUT low_value_;
  TOUT high_value_;

  // Input: label, output: weight
};

template <typename TIN, typename TOUT, class Context>
class StumpFuncIndexOp final : public Operator<Context> {
 public:
  USE_OPERATOR_CONTEXT_FUNCTIONS;

  template <class... Args>
  explicit StumpFuncIndexOp(Args&&... args)
      : Operator<Context>(std::forward<Args>(args)...),
        threshold_(this->template GetSingleArgument<TIN>("threshold", 0)) {}

  bool RunOnDevice() override;

 protected:
  TIN threshold_;
  // Input: label, output: indices
};

} // caffe2

#endif // CAFFE2_FB_OPERATORS_UTILITY_OPS_H_