linuxptp/tsproc.h

111 lines
3.7 KiB
C

/**
* @file tsproc.h
* @brief Time stamp processor.
* @note Copyright (C) 2015 Miroslav Lichvar <mlichvar@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef HAVE_TSPROC_H
#define HAVE_TSPROC_H
#include "filter.h"
/** Opaque type */
struct tsproc;
/**
* Defines the available modes.
*/
enum tsproc_mode {
TSPROC_FILTER,
TSPROC_RAW,
TSPROC_FILTER_WEIGHT,
TSPROC_RAW_WEIGHT,
};
/**
* Create a new instance of the time stamp processor.
* @param mode Time stamp processing mode.
* @param delay_filter Type of the filter that will be applied to delay.
* @param filter_length Length of the filter.
* @return A pointer to a new tsproc on success, NULL otherwise.
*/
struct tsproc *tsproc_create(enum tsproc_mode mode,
enum filter_type delay_filter, int filter_length);
/**
* Destroy a time stamp processor.
* @param tsp Pointer obtained via @ref tsproc_create().
*/
void tsproc_destroy(struct tsproc *tsp);
/**
* Feed a downstream measurement into a time stamp processor.
* @param tsp Pointer obtained via @ref tsproc_create().
* @param remote_ts The remote transmission time.
* @param local_ts The local reception time.
*/
void tsproc_down_ts(struct tsproc *tsp, tmv_t remote_ts, tmv_t local_ts);
/**
* Feed an upstream measurement into a time stamp processor.
* @param tsp Pointer obtained via @ref tsproc_create().
* @param local_ts The local transmission time.
* @param remote_ts The remote reception time.
*/
void tsproc_up_ts(struct tsproc *tsp, tmv_t local_ts, tmv_t remote_ts);
/**
* Set ratio between remote and local clock frequencies.
* @param tsp Pointer obtained via @ref tsproc_create().
* @param clock_rate_ratio The ratio between frequencies.
*/
void tsproc_set_clock_rate_ratio(struct tsproc *tsp, double clock_rate_ratio);
/**
* Set delay in a time stamp processor. This can be used to override the last
* calculated value.
* @param tsp Pointer obtained via @ref tsproc_create().
* @param delay The new delay.
*/
void tsproc_set_delay(struct tsproc *tsp, tmv_t delay);
/**
* Update delay in a time stamp processor using new measurements.
* @param tsp Pointer obtained via @ref tsproc_create().
* @param delay A pointer to store the new delay, may be NULL.
* @return 0 on success, -1 when missing a measurement.
*/
int tsproc_update_delay(struct tsproc *tsp, tmv_t *delay);
/**
* Update offset in a time stamp processor using new measurements.
* @param tsp Pointer obtained via @ref tsproc_create().
* @param offset A pointer to store the new offset.
* @param weight A pointer to store the weight of the sample, may be NULL.
* @return 0 on success, -1 when missing a measurement.
*/
int tsproc_update_offset(struct tsproc *tsp, tmv_t *offset, double *weight);
/**
* Reset a time stamp processor.
* @param tsp Pointer obtained via @ref tsproc_create().
* @param full 0 to reset stored measurements (e.g. after clock was stepped),
* 1 to reset everything (e.g. when remote clock changed).
*/
void tsproc_reset(struct tsproc *tsp, int full);
#endif