/* Copyright (c) 2016 Baidu, Inc. All Rights Reserve.

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. */


#pragma once

#include "ConvBaseLayerCpu.h"
#include "paddle/math/Matrix.h"
#include <vector>

namespace paddle {

/**
 * @brief A subclass of convolution layer.
 * This layer expands input and use matrix multiplication to
 * calculate convolution operation.
 *
 * The config file api is img_conv_layer.
 */

class ExpandConvLayer : public ConvBaseLayerCpu {
public:
  explicit ExpandConvLayer(const LayerConfig& config) :
    ConvBaseLayerCpu(config) {}

  ~ExpandConvLayer() {}

  bool init(const LayerMap& layerMap, const ParameterMap& parameterMap);

  size_t getOutputSize();

  void forward(PassType passType);
  void backward(const UpdateCallback& callback);
};

}  // namespace paddle