#ifndef CAFFE_SHUFFLE_CHANNEL_LAYER_HPP_
#define CAFFE_SHUFFLE_CHANNEL_LAYER_HPP_

#include <vector>

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

namespace caffe {

template <typename Dtype>
class ShuffleChannelLayer : public Layer<Dtype> {
public:
    explicit ShuffleChannelLayer(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 "ShuffleChannel"; }

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);

private:
    void Resize_cpu(Dtype *output, const Dtype *input, int group_row, int group_column, int len);
    void Resize_gpu(Dtype *output, const Dtype *input, int group_row, int group_column, int len);

    //Blob<Dtype> temp_blob_;
    int group_;
};

}  // namespace caffe

#endif  // CAFFE_SHUFFLE_CHANNEL_LAYER_HPP_