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# gavltime.h

    00001 /*****************************************************************
    00002  * gavl - a general purpose audio/video processing library
    00003  *
    00004  * Copyright (c) 2001 - 2008 Members of the Gmerlin project
    00005  * gmerlin-general@lists.sourceforge.net
    00006  * http://gmerlin.sourceforge.net
    00007  *
    00008  * This program is free software: you can redistribute it and/or modify
    00009  * it under the terms of the GNU General Public License as published by
    00010  * the Free Software Foundation, either version 2 of the License, or
    00011  * (at your option) any later version.
    00012  *
    00013  * This program is distributed in the hope that it will be useful,
    00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    00016  * GNU General Public License for more details.
    00017  *
    00018  * You should have received a copy of the GNU General Public License
    00019  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    00020  * *****************************************************************/
    00021
    00022
    00029 #define GAVL_TIME_SCALE     1000000
    00034 #define GAVL_TIME_UNDEFINED 0x8000000000000000LL
    00037 #define GAVL_TIME_MAX       0x7fffffffffffffffLL
    00044 typedef int64_t gavl_time_t;
    00045
    00046 /* Utility functions */
    00047
    00053 gavl_time_t gavl_samples_to_time(int samplerate, int64_t samples);
    00054
    00063 int64_t gavl_time_to_samples(int samplerate, gavl_time_t time);
    00064
    00070 gavl_time_t gavl_frames_to_time(int rate_num, int rate_den, int64_t frames);
    00071
    00072
    00082 int64_t gavl_time_to_frames(int rate_num, int rate_den, gavl_time_t time);
    00083
    00092 int64_t gavl_time_scale(int scale, gavl_time_t time);
    00093
    00102 gavl_time_t gavl_time_unscale(int scale, int64_t time);
    00103
    00113 int64_t gavl_time_rescale(int scale1, int scale2, int64_t time);
    00114
    00121 #define gavl_seconds_to_time(s) (gavl_time_t)((s)*(double)(GAVL_TIME_SCALE))
    00122
    00129 #define gavl_time_to_seconds(t) ((double)(t)/(double)(GAVL_TIME_SCALE))
    00130
    00136 void gavl_time_delay(gavl_time_t * time);
    00137
    00142 #define GAVL_TIME_STRING_LEN 11
    00143
    00153 void
    00154 gavl_time_prettyprint(gavl_time_t time, char str[GAVL_TIME_STRING_LEN]);
    00155
    00156
    00157 /* Scan time: format is hhh:mm:ss with hh: hours, mm: minutes, ss: seconds. Seconds can be a fractional
    00158    value (i.e. with decimal point) */
    00159
    00160 int gavl_time_parse(const char * str, gavl_time_t * ret);
    00161
    00162
    00163 /* Simple software timer */
    00164
    00179 typedef struct gavl_timer_s gavl_timer_t;
    00180
    00186 gavl_timer_t * gavl_timer_create();
    00187
    00195 void gavl_timer_destroy(gavl_timer_t * timer);
    00196
    00202 void gavl_timer_start(gavl_timer_t * timer);
    00203
    00209 void gavl_timer_stop(gavl_timer_t * timer);
    00210
    00217 gavl_time_t gavl_timer_get(gavl_timer_t * timer);
    00218
    00225 void gavl_timer_set(gavl_timer_t * timer, gavl_time_t t);