119 lines
4.4 KiB
C
119 lines
4.4 KiB
C
/*
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* Copyright (c) 2016, Alliance for Open Media. All rights reserved.
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*
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* This source code is subject to the terms of the BSD 2 Clause License and
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* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
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* was not distributed with this source code in the LICENSE file, you can
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* obtain it at www.aomedia.org/license/software. If the Alliance for Open
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* Media Patent License 1.0 was not distributed with this source code in the
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* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
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*/
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#ifndef AOM_AV1_ENCODER_GLOBAL_MOTION_H_
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#define AOM_AV1_ENCODER_GLOBAL_MOTION_H_
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#include "aom/aom_integer.h"
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#include "aom_dsp/flow_estimation/flow_estimation.h"
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#include "aom_util/aom_pthread.h"
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#include "av1/encoder/enc_enums.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define RANSAC_NUM_MOTIONS 1
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#define GM_MAX_REFINEMENT_STEPS 5
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#define MAX_DIRECTIONS 2
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// The structure holds a valid reference frame type and its temporal distance
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// from the source frame.
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typedef struct {
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int distance;
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MV_REFERENCE_FRAME frame;
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} FrameDistPair;
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typedef struct {
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// Array of structure which holds the global motion parameters for a given
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// motion model. motion_models[i] holds the parameters for a given motion
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// model for the ith ransac motion.
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MotionModel motion_models[RANSAC_NUM_MOTIONS];
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// Pointer to hold inliers from motion model.
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uint8_t *segment_map;
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} GlobalMotionData;
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typedef struct {
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// Holds the mapping of each thread to past/future direction.
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// thread_id_to_dir[i] indicates the direction id (past - 0/future - 1)
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// assigned to the ith thread.
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int8_t thread_id_to_dir[MAX_NUM_THREADS];
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// A flag which holds the early exit status based on the speed feature
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// 'prune_ref_frame_for_gm_search'. early_exit[i] will be set if the speed
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// feature based early exit happens in the direction 'i'.
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int8_t early_exit[MAX_DIRECTIONS];
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// Counter for the next reference frame to be processed.
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// next_frame_to_process[i] will hold the count of next reference frame to be
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// processed in the direction 'i'.
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int8_t next_frame_to_process[MAX_DIRECTIONS];
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} GlobalMotionJobInfo;
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typedef struct {
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// Data related to assigning jobs for global motion multi-threading.
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GlobalMotionJobInfo job_info;
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#if CONFIG_MULTITHREAD
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// Mutex lock used while dispatching jobs.
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pthread_mutex_t *mutex_;
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#endif
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// Initialized to false, set to true by the worker thread that encounters an
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// error in order to abort the processing of other worker threads.
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bool gm_mt_exit;
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} AV1GlobalMotionSync;
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void av1_convert_model_to_params(const double *params,
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WarpedMotionParams *model);
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// Criteria for accepting a global motion model
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static const double erroradv_tr[2] = { 0.65, 0.2 };
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static const double erroradv_prod_tr = 20000;
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// Early exit threshold for global motion refinement
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// This is set slightly higher than erroradv_tr, as a compromise between
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// two factors:
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//
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// 1) By rejecting un-promising models early, we can reduce the encode time
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// spent trying to refine them
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//
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// 2) When we refine a model, its error may decrease to below the acceptance
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// threshold even if the model is initially above the threshold
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static const double erroradv_early_tr = 0.70;
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int av1_is_enough_erroradvantage(double best_erroradvantage, int params_cost,
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double gm_erroradv_tr);
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void av1_compute_feature_segmentation_map(uint8_t *segment_map, int width,
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int height, int *inliers,
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int num_inliers);
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int64_t av1_segmented_frame_error(int use_hbd, int bd, const uint8_t *ref,
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int ref_stride, uint8_t *dst, int dst_stride,
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int p_width, int p_height,
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uint8_t *segment_map, int segment_map_stride);
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// Returns the warp error between "dst" and the result of applying the
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// motion params that result from fine-tuning "wm" to "ref". Note that "wm" is
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// modified in place.
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int64_t av1_refine_integerized_param(
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WarpedMotionParams *wm, TransformationType wmtype, int use_hbd, int bd,
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uint8_t *ref, int r_width, int r_height, int r_stride, uint8_t *dst,
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int d_width, int d_height, int d_stride, int n_refinements,
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int64_t ref_frame_error, uint8_t *segment_map, int segment_map_stride,
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double gm_erroradv_tr);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // AOM_AV1_ENCODER_GLOBAL_MOTION_H_
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