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/*
* Copyright (c) 2018 Sergey Lavrushkin
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* DNN inference engine interface.
*/
#ifndef AVFILTER_DNN_INTERFACE_H
#define AVFILTER_DNN_INTERFACE_H
typedef enum {DNN_SUCCESS, DNN_ERROR} DNNReturnType;
typedef enum {DNN_NATIVE, DNN_TF} DNNBackendType;
typedef enum {DNN_SRCNN, DNN_ESPCN} DNNDefaultModel;
typedef struct DNNData{
float* data;
int width, height, channels;
} DNNData;
typedef struct DNNModel{
// Stores model that can be different for different backends.
void* model;
// Sets model input and output, while allocating additional memory for intermediate calculations.
// Should be called at least once before model execution.
DNNReturnType (*set_input_output)(void* model, DNNData* input, DNNData* output);
} DNNModel;
// Stores pointers to functions for loading, executing, freeing DNN models for one of the backends.
typedef struct DNNModule{
// Loads model and parameters from given file. Returns NULL if it is not possible.
DNNModel* (*load_model)(const char* model_filename);
// Loads one of the default models
DNNModel* (*load_default_model)(DNNDefaultModel model_type);
// Executes model with specified input and output. Returns DNN_ERROR otherwise.
DNNReturnType (*execute_model)(const DNNModel* model);
// Frees memory allocated for model.
void (*free_model)(DNNModel** model);
} DNNModule;
// Initializes DNNModule depending on chosen backend.
DNNModule* ff_get_dnn_module(DNNBackendType backend_type);
#endif
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