scale_layer.hpp

#ifndef CAFFE_SCALE_LAYER_HPP_
#define CAFFE_SCALE_LAYER_HPP_

#include <vector>

#include "caffe/blob.hpp"
#include "caffe/layer.hpp"
#include "caffe/proto/caffe.pb.h"

#include "caffe/layers/bias_layer.hpp"

namespace caffe {

template <typename Dtype>
class ScaleLayer: public Layer<Dtype> {
 public:
  explicit ScaleLayer(const LayerParameter& param)
      : Layer<Dtype>(param) {}
  virtual void LayerSetUp(const vector<Blob<Dtype>*>& bottom,
      const vector<Blob<Dtype>*>& top);
  virtual void Reshape(const vector<Blob<Dtype>*>& bottom,
      const vector<Blob<Dtype>*>& top);

  virtual inline const char* type() const { return "Scale"; }
  // Scale
  virtual inline int MinBottomBlobs() const { return 1; }
  virtual inline int MaxBottomBlobs() const { return 2; }
  virtual inline int ExactNumTopBlobs() const { return 1; }

 protected:
  virtual void Forward_cpu(const vector<Blob<Dtype>*>& bottom,
      const vector<Blob<Dtype>*>& top);
  virtual void Forward_gpu(const vector<Blob<Dtype>*>& bottom,
      const vector<Blob<Dtype>*>& top);
  virtual void Backward_cpu(const vector<Blob<Dtype>*>& top,
      const vector<bool>& propagate_down, const vector<Blob<Dtype>*>& bottom);
  virtual void Backward_gpu(const vector<Blob<Dtype>*>& top,
      const vector<bool>& propagate_down, const vector<Blob<Dtype>*>& bottom);

  shared_ptr<Layer<Dtype> > bias_layer_;
  vector<Blob<Dtype>*> bias_bottom_vec_;
  vector<bool> bias_propagate_down_;
  int bias_param_id_;

  Blob<Dtype> sum_multiplier_;
  Blob<Dtype> sum_result_;
  Blob<Dtype> temp_;
  int axis_;
  int outer_dim_, scale_dim_, inner_dim_;
};


}  // namespace caffe

#endif  // CAFFE_SCALE_LAYER_HPP_