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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 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
#include "aom/aom_integer.h"
#include "aom_scale/yv12config.h"
#include "aom_util/aom_thread.h"
#include "av1/common/mv.h"
#include "av1/common/warped_motion.h"
#ifdef __cplusplus
extern "C" {
#define MAX_CORNERS 4096
typedef enum {
} 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;
// The structure holds a valid reference frame type and its temporal distance
// from the source frame.
typedef struct {
int distance;
} FrameDistPair;
typedef struct {
// Array of structure which holds the global motion parameters for a given
// motion model. params_by_motion[i] holds the parameters for a given motion
// model for the ith ransac motion.
MotionModel params_by_motion[RANSAC_NUM_MOTIONS];
// Pointer to hold inliers from motion model.
uint8_t *segment_map;
} GlobalMotionThreadData;
typedef struct {
// Holds the mapping of each thread to past/future direction.
// thread_id_to_dir[i] indicates the direction id (past - 0/future - 1)
// assigned to the ith thread.
int8_t thread_id_to_dir[MAX_NUM_THREADS];
// A flag which holds the early exit status based on the speed feature
// 'prune_ref_frame_for_gm_search'. early_exit[i] will be set if the speed
// feature based early exit happens in the direction 'i'.
int8_t early_exit[MAX_DIRECTIONS];
// Counter for the next reference frame to be processed.
// next_frame_to_process[i] will hold the count of next reference frame to be
// processed in the direction 'i'.
int8_t next_frame_to_process[MAX_DIRECTIONS];
} JobInfo;
typedef struct {
// Data related to assigning jobs for global motion multi-threading.
JobInfo job_info;
// Data specific to each worker in global motion multi-threading.
// thread_data[i] stores the thread specific data for worker 'i'.
GlobalMotionThreadData *thread_data;
// Mutex lock used while dispatching jobs.
pthread_mutex_t *mutex_;
// Width and height for which segment_map is allocated for each thread.
int allocated_width;
int allocated_height;
// Number of workers for which thread_data is allocated.
int8_t allocated_workers;
} AV1GlobalMotionSync;
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;
static const double erroradv_prod_tr = 20000;
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);
// 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 *src_buffer, int src_width,
int src_height, int src_stride, int *src_corners,
int num_src_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"