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 #ifndef GAVLTIME_H_INCLUDED
00023 #define GAVLTIME_H_INCLUDED
00024 
00025 #ifdef __cplusplus
00026 extern "C" {
00027 #endif
00028 
00029 #pragma GCC visibility push(default)
00030   
00037 #define GAVL_TIME_SCALE     1000000 
00042 #define GAVL_TIME_UNDEFINED 0x8000000000000000LL 
00045 #define GAVL_TIME_MAX       0x7fffffffffffffffLL 
00052 typedef int64_t gavl_time_t;
00053 
00054 /* Utility functions */
00055 
00060 gavl_time_t gavl_samples_to_time(int samplerate, int64_t samples);
00061 
00069 int64_t gavl_time_to_samples(int samplerate, gavl_time_t time);
00070 
00075 gavl_time_t gavl_frames_to_time(int rate_num, int rate_den, int64_t frames);
00076 
00077 
00086 int64_t gavl_time_to_frames(int rate_num, int rate_den, gavl_time_t time); 
00087 
00095 int64_t gavl_time_scale(int scale, gavl_time_t time);
00096 
00104 gavl_time_t gavl_time_unscale(int scale, int64_t time);
00105 
00114 int64_t gavl_time_rescale(int scale1, int scale2, int64_t time);
00115 
00122 #define gavl_seconds_to_time(s) (gavl_time_t)((s)*(double)(GAVL_TIME_SCALE))
00123 
00130 #define gavl_time_to_seconds(t) ((double)(t)/(double)(GAVL_TIME_SCALE))
00131 
00137 void gavl_time_delay(gavl_time_t * time);
00138 
00143 #define GAVL_TIME_STRING_LEN 11
00144 
00154 void
00155 gavl_time_prettyprint(gavl_time_t time, char str[GAVL_TIME_STRING_LEN]);
00156 
00157 
00158 /* Scan time: format is hhh:mm:ss with hh: hours, mm: minutes, ss: seconds. Seconds can be a fractional
00159    value (i.e. with decimal point) */
00160 
00161 int gavl_time_parse(const char * str, gavl_time_t * ret);
00162 
00163 
00164 /* Simple software timer */
00165 
00180 typedef struct gavl_timer_s gavl_timer_t;
00181 
00187 gavl_timer_t * gavl_timer_create();
00188 
00196 void gavl_timer_destroy(gavl_timer_t * timer);
00197 
00203 void gavl_timer_start(gavl_timer_t * timer);
00204 
00210 void gavl_timer_stop(gavl_timer_t * timer);
00211 
00218 gavl_time_t gavl_timer_get(gavl_timer_t * timer);
00219 
00226 void gavl_timer_set(gavl_timer_t * timer, gavl_time_t t);
00227 
00228 #pragma GCC visibility pop
00229   
00230 #ifdef __cplusplus
00231 }
00232 #endif
00233 
00234 #endif /* GAVLTIME_H_INCLUDED */
00235 

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