#ifndef CAFFE_SLICE_LAYER_HPP_

#define CAFFE_SLICE_LAYER_HPP_

#include <vector>

#include "caffe/blob.hpp"

#include "caffe/layer.hpp"

#include "caffe/proto/caffe.pb.h"

namespace caffe {

/**

* @brief Takes a Blob and slices it along either the num or channel dimension,

* outputting multiple sliced Blob results.

*

* TODO(dox): thorough documentation for Forward, Backward, and proto params.

*/

template <typename Dtype>

class SliceLayer : public Layer<Dtype> {

public:

explicit SliceLayer(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 "Slice"; }

virtual inline int ExactNumBottomBlobs() const { return 1; }

virtual inline int MinTopBlobs() 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);

int count_;

int num_slices_;

int slice_size_;

int slice_axis_;

vector<int> slice_point_;

};

} // namespace caffe

#endif // CAFFE_SLICE_LAYER_HPP_