libjack/timestamps.c

   1 /*
   2     Copyright (C) 2002-2003 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU Lesser General Public License as published by
   6     the Free Software Foundation; either version 2.1 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU Lesser General Public License for more details.
  13
  14     You should have received a copy of the GNU Lesser General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17
  18 */
  19
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <jack/timestamps.h>
  23 #include <jack/internal.h>
  24 #include <sysdeps/time.h>
  25
  26 typedef struct {
  27     jack_time_t when;
  28     const char *what;
  29 } jack_timestamp_t;
  30
  31 static jack_timestamp_t *timestamps = 0;
  32 static unsigned long timestamp_cnt = 0;
  33 static unsigned long timestamp_index;
  34
  35 void
  36 jack_init_timestamps (unsigned long howmany)
  37 {
  38         if (timestamps) {
  39                 free (timestamps);
  40         }
  41         timestamps = (jack_timestamp_t *)
  42                 malloc (howmany * sizeof(jack_timestamp_t));
  43         timestamp_cnt = howmany;
  44         memset (timestamps, 0, sizeof (jack_timestamp_t) * howmany);
  45         timestamp_index = 0;
  46 }
  47
  48 void
  49 jack_timestamp (const char *what)
  50 {
  51         if (timestamp_index < timestamp_cnt) {
  52                 timestamps[timestamp_index].when = jack_get_microseconds();
  53                 timestamps[timestamp_index].what = what;
  54                 ++timestamp_index;
  55         }
  56 }
  57
  58 void
  59 jack_dump_timestamps (FILE *out)
  60 {
  61         unsigned long i;
  62
  63         for (i = 0; i < timestamp_index; ++i) {
  64                 fprintf (out, "%-.32s %" PRIu64 " %" PRIu64,
  65                          timestamps[i].what, timestamps[i].when,
  66                          timestamps[i].when - timestamps[0].when);
  67                 if (i > 0) {
  68                         fprintf (out, " %" PRIu64,
  69                                  timestamps[i].when - timestamps[i-1].when);
  70                 }
  71                 fputc ('\n', out);
  72         }
  73 }
  74
  75 void
  76 jack_reset_timestamps ()
  77 {
  78         timestamp_index = 0;
  79 }
  80