headers/statistics.h

/*
    Copyright (C) 2004 Rui Nuno Capela, Lee Revell

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/

#ifndef JACK_STATISTICS_H
#define JACK_STATISTICS_H

#ifdef __cplusplus
extern "C" {
#endif

#include <jack/types.h>

/**
 * @return the maximum delay reported by the backend since
 * startup or reset.  When compared to the period size in usecs, this
 * can be used to estimate the ideal period size for a given setup.
 */
float jack_get_max_delayed_usecs (jack_client_t *client);

/**
 * @return the delay in microseconds due to the most recent XRUN
 * occurrence.  This probably only makes sense when called from a @ref
 * JackXRunCallback defined using jack_set_xrun_callback().
 */
float jack_get_xrun_delayed_usecs (jack_client_t *client);

/**
 * Reset the maximum delay counter.  This would be useful
 * to estimate the effect that a change to the configuration of a running
 * system (e.g. toggling kernel preemption) has on the delay
 * experienced by JACK, without having to restart the JACK engine.
 */
void jack_reset_max_delayed_usecs (jack_client_t *client);

#ifdef __cplusplus
}
#endif

#endif /* JACK_STATISTICS_H */