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/*
* Copyright (c) 2021, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 3-Clause Clear License
* and the Alliance for Open Media Patent License 1.0. If the BSD 3-Clause Clear
* License was not distributed with this source code in the LICENSE file, you
* can obtain it at aomedia.org/license/software-license/bsd-3-c-c/. If the
* Alliance for Open Media Patent License 1.0 was not distributed with this
* source code in the PATENTS file, you can obtain it at
* aomedia.org/license/patent-license/.
*/
#ifndef AOM_AV1_ENCODER_OPTICAL_FLOW_H_
#define AOM_AV1_ENCODER_OPTICAL_FLOW_H_
#include "config/aom_config.h"
#ifdef __cplusplus
extern "C" {
#endif
#if CONFIG_OPTICAL_FLOW_API
typedef enum { LUCAS_KANADE } OPTFLOW_METHOD;
typedef enum {
MV_FILTER_NONE,
MV_FILTER_SMOOTH,
MV_FILTER_MEDIAN
} MV_FILTER_TYPE;
// default options for optical flow
#define OPFL_WINDOW_SIZE 15
#define OPFL_PYRAMID_LEVELS 3 // total levels (max is 5)
// parameters specific to Lucas-Kanade
typedef struct lk_params {
int window_size;
} LK_PARAMS;
// generic structure to contain parameters for all
// optical flow algorithms
typedef struct opfl_params {
int pyramid_levels;
LK_PARAMS *lk_params;
} OPFL_PARAMS;
void init_opfl_params(OPFL_PARAMS *opfl_params) {
opfl_params->pyramid_levels = OPFL_PYRAMID_LEVELS;
opfl_params->lk_params = NULL;
}
void init_lk_params(LK_PARAMS *lk_params) {
lk_params->window_size = OPFL_WINDOW_SIZE;
}
void optical_flow(const YV12_BUFFER_CONFIG *from_frame,
const YV12_BUFFER_CONFIG *to_frame, const int from_frame_idx,
const int to_frame_idx, const int bit_depth,
const OPFL_PARAMS *opfl_params,
const MV_FILTER_TYPE mv_filter, const OPTFLOW_METHOD method,
MV *mvs);
#endif
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AV1_ENCODER_OPTICAL_FLOW_H_