// Tencent is pleased to support the open source community by making ncnn available.
//
// Copyright (C) 2017 THL A29 Limited, a Tencent company. All rights reserved.
//
// Licensed under the BSD 3-Clause License (the "License"); you may not use this file except
// in compliance with the License. You may obtain a copy of the License at
//
// https://opensource.org/licenses/BSD-3-Clause
//
// 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.

#ifndef LAYER_LSTM_H
#define LAYER_LSTM_H

#include "layer.h"

namespace ncnn {

class LSTM : public Layer
{
public:
    LSTM();

    virtual int load_param(const ParamDict& pd);

    virtual int load_model(const ModelBin& mb);

    virtual int forward(const Mat& bottom_blob, Mat& top_blob, const Option& opt) const;

    virtual int forward(const std::vector<Mat>& bottom_blobs, std::vector<Mat>& top_blobs, const Option& opt) const;

public:
    int num_output;
    int weight_data_size;
    int direction; // 0=forward 1=reverse 2=bidirectional
    int hidden_size;

    int int8_scale_term;

    Mat weight_hc_data;
    Mat weight_xc_data;
    Mat bias_c_data;
    Mat weight_hr_data;

#if NCNN_INT8
    Mat weight_hc_data_int8_scales;
    Mat weight_xc_data_int8_scales;
#endif
};

} // namespace ncnn

#endif // LAYER_LSTM_H
