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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_AV1_ENCODER_GLOBAL_MOTION_H_
#define AOM_AV1_ENCODER_GLOBAL_MOTION_H_
#include "aom/aom_integer.h"
#include "aom_scale/yv12config.h"
#include "av1/common/mv.h"
#include "av1/common/warped_motion.h"
#ifdef __cplusplus
extern "C" {
#endif
#define MAX_CORNERS 4096
#define RANSAC_NUM_MOTIONS 1
#define GM_REFINEMENT_COUNT 5
typedef enum {
GLOBAL_MOTION_FEATURE_BASED,
GLOBAL_MOTION_DISFLOW_BASED,
} GlobalMotionEstimationType;
unsigned char *av1_downconvert_frame(YV12_BUFFER_CONFIG *frm, int bit_depth);
typedef struct {
double params[MAX_PARAMDIM - 1];
int *inliers;
int num_inliers;
} MotionModel;
void av1_convert_model_to_params(const double *params,
WarpedMotionParams *model);
// TODO(sarahparker) These need to be retuned for speed 0 and 1 to
// maximize gains from segmented error metric
static const double erroradv_tr[] = { 0.65, 0.60, 0.65 };
static const double erroradv_prod_tr[] = { 20000, 18000, 16000 };
int av1_is_enough_erroradvantage(double best_erroradvantage, int params_cost,
int erroradv_type);
void av1_compute_feature_segmentation_map(uint8_t *segment_map, int width,
int height, int *inliers,
int num_inliers);
// Returns the error between the result of applying motion 'wm' to the frame
// described by 'ref' and the frame described by 'dst'.
int64_t av1_warp_error(WarpedMotionParams *wm, int use_hbd, int bd,
const uint8_t *ref, int width, int height, int stride,
uint8_t *dst, int p_col, int p_row, int p_width,
int p_height, int p_stride, int subsampling_x,
int subsampling_y, int64_t best_error,
uint8_t *segment_map, int segment_map_stride);
// Returns the av1_warp_error between "dst" and the result of applying the
// motion params that result from fine-tuning "wm" to "ref". Note that "wm" is
// modified in place.
int64_t av1_refine_integerized_param(
WarpedMotionParams *wm, TransformationType wmtype, int use_hbd, int bd,
uint8_t *ref, int r_width, int r_height, int r_stride, uint8_t *dst,
int d_width, int d_height, int d_stride, int n_refinements,
int64_t best_frame_error, uint8_t *segment_map, int segment_map_stride,
int64_t erroradv_threshold);
/*
Computes "num_motions" candidate global motion parameters between two frames.
The array "params_by_motion" should be length 8 * "num_motions". The ordering
of each set of parameters is best described by the homography:
[x' (m2 m3 m0 [x
z . y' = m4 m5 m1 * y
1] m6 m7 1) 1]
where m{i} represents the ith value in any given set of parameters.
"num_inliers" should be length "num_motions", and will be populated with the
number of inlier feature points for each motion. Params for which the
num_inliers entry is 0 should be ignored by the caller.
*/
int av1_compute_global_motion(TransformationType type,
unsigned char *frm_buffer, int frm_width,
int frm_height, int frm_stride, int *frm_corners,
int num_frm_corners, YV12_BUFFER_CONFIG *ref,
int bit_depth,
GlobalMotionEstimationType gm_estimation_type,
int *num_inliers_by_motion,
MotionModel *params_by_motion, int num_motions);
#ifdef __cplusplus
} // extern "C"
#endif
#endif // AOM_AV1_ENCODER_GLOBAL_MOTION_H_
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