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/*
* Copyright (c) 2016, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. 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 www.aomedia.org/license/patent.
*/
#ifndef AOM_AOM_DSP_FLOW_ESTIMATION_H_
#define AOM_AOM_DSP_FLOW_ESTIMATION_H_
#include "aom_dsp/pyramid.h"
#include "aom_dsp/flow_estimation/corner_detect.h"
#include "aom_ports/mem.h"
#include "aom_scale/yv12config.h"
#ifdef __cplusplus
extern "C" {
#endif
#define MAX_PARAMDIM 9
#define MAX_CORNERS 4096
#define MIN_INLIER_PROB 0.1
/* clang-format off */
enum {
IDENTITY = 0, // identity transformation, 0-parameter
TRANSLATION = 1, // translational motion 2-parameter
ROTZOOM = 2, // simplified affine with rotation + zoom only, 4-parameter
AFFINE = 3, // affine, 6-parameter
TRANS_TYPES,
} UENUM1BYTE(TransformationType);
/* clang-format on */
// number of parameters used by each transformation in TransformationTypes
static const int trans_model_params[TRANS_TYPES] = { 0, 2, 4, 6 };
typedef enum {
GLOBAL_MOTION_FEATURE_BASED,
GLOBAL_MOTION_DISFLOW_BASED,
} GlobalMotionEstimationType;
typedef struct {
double params[MAX_PARAMDIM - 1];
int *inliers;
int num_inliers;
} MotionModel;
typedef struct {
double x, y;
double rx, ry;
} Correspondence;
int aom_compute_global_motion(TransformationType type, YV12_BUFFER_CONFIG *src,
YV12_BUFFER_CONFIG *ref, int bit_depth,
GlobalMotionEstimationType gm_estimation_type,
MotionModel *motion_models,
int num_motion_models);
#ifdef __cplusplus
}
#endif
#endif // AOM_AOM_DSP_FLOW_ESTIMATION_H_