flow_estimation.c (2249B)
1 /* 2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved. 3 * 4 * This source code is subject to the terms of the BSD 2 Clause License and 5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License 6 * was not distributed with this source code in the LICENSE file, you can 7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open 8 * Media Patent License 1.0 was not distributed with this source code in the 9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent. 10 */ 11 12 #include <assert.h> 13 14 #include "aom_dsp/flow_estimation/corner_detect.h" 15 #include "aom_dsp/flow_estimation/corner_match.h" 16 #include "aom_dsp/flow_estimation/disflow.h" 17 #include "aom_dsp/flow_estimation/flow_estimation.h" 18 #include "aom_ports/mem.h" 19 #include "aom_scale/yv12config.h" 20 21 // clang-format off 22 const double kIdentityParams[MAX_PARAMDIM] = { 23 0.0, 0.0, 1.0, 0.0, 0.0, 1.0 24 }; 25 // clang-format on 26 27 // Compute a global motion model between the given source and ref frames. 28 // 29 // As is standard for video codecs, the resulting model maps from (x, y) 30 // coordinates in `src` to the corresponding points in `ref`, regardless 31 // of the temporal order of the two frames. 32 // 33 // Returns true if global motion estimation succeeded, false if not. 34 // The output models should only be used if this function succeeds. 35 bool aom_compute_global_motion(TransformationType type, YV12_BUFFER_CONFIG *src, 36 YV12_BUFFER_CONFIG *ref, int bit_depth, 37 GlobalMotionMethod gm_method, 38 int downsample_level, MotionModel *motion_models, 39 int num_motion_models, bool *mem_alloc_failed) { 40 switch (gm_method) { 41 case GLOBAL_MOTION_METHOD_FEATURE_MATCH: 42 return av1_compute_global_motion_feature_match( 43 type, src, ref, bit_depth, downsample_level, motion_models, 44 num_motion_models, mem_alloc_failed); 45 case GLOBAL_MOTION_METHOD_DISFLOW: 46 return av1_compute_global_motion_disflow( 47 type, src, ref, bit_depth, downsample_level, motion_models, 48 num_motion_models, mem_alloc_failed); 49 default: assert(0 && "Unknown global motion estimation type"); 50 } 51 return false; 52 }