/*

 * 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.

 */

#include <assert.h>

#include "aom_dsp/flow_estimation/corner_detect.h"

#include "aom_dsp/flow_estimation/corner_match.h"

#include "aom_dsp/flow_estimation/disflow.h"

#include "aom_dsp/flow_estimation/flow_estimation.h"

#include "aom_ports/mem.h"

#include "aom_scale/yv12config.h"

// clang-format off

const double kIdentityParams[MAX_PARAMDIM] = {

  0.0, 0.0, 1.0, 0.0, 0.0, 1.0

};

// clang-format on

// Compute a global motion model between the given source and ref frames.

//

// As is standard for video codecs, the resulting model maps from (x, y)

// coordinates in `src` to the corresponding points in `ref`, regardless

// of the temporal order of the two frames.

//

// Returns true if global motion estimation succeeded, false if not.

// The output models should only be used if this function succeeds.

bool aom_compute_global_motion(TransformationType type, YV12_BUFFER_CONFIG *src,

                               YV12_BUFFER_CONFIG *ref, int bit_depth,

                               GlobalMotionMethod gm_method,

                               int downsample_level, MotionModel *motion_models,

                               int num_motion_models, bool *mem_alloc_failed) {

  switch (gm_method) {

    case GLOBAL_MOTION_METHOD_FEATURE_MATCH:

      return av1_compute_global_motion_feature_match(

          type, src, ref, bit_depth, downsample_level, motion_models,

          num_motion_models, mem_alloc_failed);

    case GLOBAL_MOTION_METHOD_DISFLOW:

      return av1_compute_global_motion_disflow(

          type, src, ref, bit_depth, downsample_level, motion_models,

          num_motion_models, mem_alloc_failed);

    default: assert(0 && "Unknown global motion estimation type");

  }

  return false;

}