chromium/third_party/libaom/source/libaom/av1/encoder/global_motion.h

/*
 * 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_dsp/flow_estimation/flow_estimation.h"
#include "aom_util/aom_pthread.h"
#include "av1/encoder/enc_enums.h"

#ifdef __cplusplus
extern "C" {
#endif

#define RANSAC_NUM_MOTIONS …
#define GM_MAX_REFINEMENT_STEPS …
#define MAX_DIRECTIONS …

// The structure holds a valid reference frame type and its temporal distance
// from the source frame.
FrameDistPair;

GlobalMotionData;

GlobalMotionJobInfo;

AV1GlobalMotionSync;

void av1_convert_model_to_params(const double *params,
                                 WarpedMotionParams *model);

// Criteria for accepting a global motion model
static const double erroradv_tr = …;
static const double erroradv_prod_tr = …;

// Early exit threshold for global motion refinement
// This is set slightly higher than erroradv_tr, as a compromise between
// two factors:
//
// 1) By rejecting un-promising models early, we can reduce the encode time
//    spent trying to refine them
//
// 2) When we refine a model, its error may decrease to below the acceptance
//    threshold even if the model is initially above the threshold
static const double erroradv_early_tr = …;

int av1_is_enough_erroradvantage(double best_erroradvantage, int params_cost);

void av1_compute_feature_segmentation_map(uint8_t *segment_map, int width,
                                          int height, int *inliers,
                                          int num_inliers);

int64_t av1_segmented_frame_error(int use_hbd, int bd, const uint8_t *ref,
                                  int ref_stride, uint8_t *dst, int dst_stride,
                                  int p_width, int p_height,
                                  uint8_t *segment_map, int segment_map_stride);

// 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 ref_width, int ref_height,
                       int ref_stride, uint8_t *dst, int dst_stride, int p_col,
                       int p_row, int p_width, int p_height, 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 ref_frame_error, uint8_t *segment_map, int segment_map_stride);

#ifdef __cplusplus
}  // extern "C"
#endif
#endif  // AOM_AV1_ENCODER_GLOBAL_MOTION_H_