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/*
* Copyright © 2012 Jonas Ådahl
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef FILTER_PRIVATE_H
#define FILTER_PRIVATE_H
#include "config.h"
#include "filter.h"
struct motion_filter_interface {
enum libinput_config_accel_profile type;
struct normalized_coords (*filter)(
struct motion_filter *filter,
const struct device_float_coords *unaccelerated,
void *data, uint64_t time);
struct normalized_coords (*filter_constant)(
struct motion_filter *filter,
const struct device_float_coords *unaccelerated,
void *data, uint64_t time);
void (*restart)(struct motion_filter *filter,
void *data,
uint64_t time);
void (*destroy)(struct motion_filter *filter);
bool (*set_speed)(struct motion_filter *filter,
double speed_adjustment);
};
struct motion_filter {
double speed_adjustment; /* normalized [-1, 1] */
struct motion_filter_interface *interface;
};
struct pointer_tracker {
struct device_float_coords delta; /* delta to most recent event */
uint64_t time; /* us */
uint32_t dir;
};
/* For smoothing timestamps from devices with unreliable timing */
struct pointer_delta_smoothener {
uint64_t threshold;
uint64_t value;
};
struct pointer_trackers {
struct pointer_tracker *trackers;
size_t ntrackers;
unsigned int cur_tracker;
struct pointer_delta_smoothener *smoothener;
};
void trackers_init(struct pointer_trackers *trackers);
void trackers_free(struct pointer_trackers *trackers);
void
trackers_reset(struct pointer_trackers *trackers,
uint64_t time);
void
trackers_feed(struct pointer_trackers *trackers,
const struct device_float_coords *delta,
uint64_t time);
struct pointer_tracker *
trackers_by_offset(struct pointer_trackers *trackers, unsigned int offset);
double
trackers_velocity(struct pointer_trackers *trackers, uint64_t time);
double
calculate_acceleration_simpsons(struct motion_filter *filter,
accel_profile_func_t profile,
void *data,
double velocity,
double last_velocity,
uint64_t time);
/* Convert speed/velocity from units/us to units/ms */
static inline double
v_us2ms(double units_per_us)
{
return units_per_us * 1000.0;
}
static inline double
v_us2s(double units_per_us)
{
return units_per_us * 1000000.0;
}
/* Convert speed/velocity from units/ms to units/us */
static inline double
v_ms2us(double units_per_ms)
{
return units_per_ms/1000.0;
}
static inline struct normalized_coords
normalize_for_dpi(const struct device_float_coords *coords, int dpi)
{
struct normalized_coords norm;
norm.x = coords->x * DEFAULT_MOUSE_DPI/dpi;
norm.y = coords->y * DEFAULT_MOUSE_DPI/dpi;
return norm;
}
#endif
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