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Sourcecode: jack-audio-connection-kit version File versions  Download package

timestamps.c

/*
    Copyright (C) 2002-2003 Paul Davis
    
    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.

    $Id: timestamps.c,v 1.7 2004/03/25 19:31:51 joq Exp $
*/

#include <stdlib.h>
#include <string.h>
#include <jack/timestamps.h>
#include <jack/internal.h>
#include <sysdeps/time.h>

typedef struct {
    jack_time_t when;
    const char *what;
} jack_timestamp_t;

static jack_timestamp_t *timestamps = 0;
static unsigned long timestamp_cnt = 0;
static unsigned long timestamp_index;

void
jack_init_timestamps (unsigned long howmany)
{
      if (timestamps) {
            free (timestamps);
      }
      timestamps = (jack_timestamp_t *)
            malloc (howmany * sizeof(jack_timestamp_t));
      timestamp_cnt = howmany;
      memset (timestamps, 0, sizeof (jack_timestamp_t) * howmany);
      timestamp_index = 0;
}

void
jack_timestamp (const char *what)
{
      if (timestamp_index < timestamp_cnt) {
            timestamps[timestamp_index].when = jack_get_microseconds();
            timestamps[timestamp_index].what = what;
            ++timestamp_index;
      }
}

void
jack_dump_timestamps (FILE *out)
{
      unsigned long i;

      for (i = 0; i < timestamp_index; ++i) {
            fprintf (out, "%-.32s %" PRIu64 " %" PRIu64, 
                   timestamps[i].what, timestamps[i].when,
                   timestamps[i].when - timestamps[0].when);
            if (i > 0) {
                  fprintf (out, " %" PRIu64,
                         timestamps[i].when - timestamps[i-1].when);
            }
            fputc ('\n', out);
      }
}

void
jack_reset_timestamps ()
{
      timestamp_index = 0;
}


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