gavltime.h

/*****************************************************************
 * gavl - a general purpose audio/video processing library
 *
 * Copyright (c) 2001 - 2008 Members of the Gmerlin project
 * gmerlin-general@lists.sourceforge.net
 * http://gmerlin.sourceforge.net
 *
 * 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, see <http://www.gnu.org/licenses/>.
 * *****************************************************************/
 
#ifndef GAVLTIME_H_INCLUDED
#define GAVLTIME_H_INCLUDED

#ifdef __cplusplus
extern "C" {
#endif

#define GAVL_TIME_SCALE     1000000 
#define GAVL_TIME_UNDEFINED 0x8000000000000000LL 
#define GAVL_TIME_MAX       0x7fffffffffffffffLL 
typedef int64_t gavl_time_t;

/* Utility functions */

gavl_time_t gavl_samples_to_time(int samplerate, int64_t samples);

int64_t gavl_time_to_samples(int samplerate, gavl_time_t time);

gavl_time_t gavl_frames_to_time(int rate_num, int rate_den, int64_t frames);


int64_t gavl_time_to_frames(int rate_num, int rate_den, gavl_time_t time); 

int64_t gavl_time_scale(int scale, gavl_time_t time);

gavl_time_t gavl_time_unscale(int scale, int64_t time);

int64_t gavl_time_rescale(int scale1, int scale2, int64_t time);

#define gavl_seconds_to_time(s) (gavl_time_t)((s)*(double)(GAVL_TIME_SCALE))

#define gavl_time_to_seconds(t) ((double)(t)/(double)(GAVL_TIME_SCALE))

void gavl_time_delay(gavl_time_t * time);

#define GAVL_TIME_STRING_LEN 11

void
gavl_time_prettyprint(gavl_time_t time, char str[GAVL_TIME_STRING_LEN]);


/* Scan time: format is hhh:mm:ss with hh: hours, mm: minutes, ss: seconds. Seconds can be a fractional
   value (i.e. with decimal point) */

int gavl_time_parse(const char * str, gavl_time_t * ret);


/* Simple software timer */

typedef struct gavl_timer_s gavl_timer_t;

gavl_timer_t * gavl_timer_create();

void gavl_timer_destroy(gavl_timer_t * timer);

void gavl_timer_start(gavl_timer_t * timer);

void gavl_timer_stop(gavl_timer_t * timer);

gavl_time_t gavl_timer_get(gavl_timer_t * timer);

void gavl_timer_set(gavl_timer_t * timer, gavl_time_t t);

#ifdef __cplusplus
}
#endif

#endif /* GAVLTIME_H_INCLUDED */

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