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 #include <gavl/gavldefs.h>
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_PUBLIC
00061 gavl_time_t gavl_samples_to_time(int samplerate, int64_t samples);
00062 
00070 GAVL_PUBLIC
00071 int64_t gavl_time_to_samples(int samplerate, gavl_time_t time);
00072 
00077 GAVL_PUBLIC
00078 gavl_time_t gavl_frames_to_time(int rate_num, int rate_den, int64_t frames);
00079 
00080 
00089 GAVL_PUBLIC
00090 int64_t gavl_time_to_frames(int rate_num, int rate_den, gavl_time_t time); 
00091 
00099 GAVL_PUBLIC
00100 int64_t gavl_time_scale(int scale, gavl_time_t time);
00101 
00109 GAVL_PUBLIC
00110 gavl_time_t gavl_time_unscale(int scale, int64_t time);
00111 
00120 GAVL_PUBLIC
00121 int64_t gavl_time_rescale(int scale1, int scale2, int64_t time);
00122 
00129 #define gavl_seconds_to_time(s) (gavl_time_t)((s)*(double)(GAVL_TIME_SCALE))
00130 
00137 #define gavl_time_to_seconds(t) ((double)(t)/(double)(GAVL_TIME_SCALE))
00138 
00144 GAVL_PUBLIC
00145 void gavl_time_delay(gavl_time_t * time);
00146 
00151 #define GAVL_TIME_STRING_LEN 11
00152 
00162 GAVL_PUBLIC void
00163 gavl_time_prettyprint(gavl_time_t time, char str[GAVL_TIME_STRING_LEN]);
00164 
00169 #define GAVL_TIME_STRING_LEN_MS 15
00170 
00182 GAVL_PUBLIC void
00183 gavl_time_prettyprint_ms(gavl_time_t time, char str[GAVL_TIME_STRING_LEN_MS]);
00184   
00185 
00186 /* Scan time: format is hhh:mm:ss with hh: hours, mm: minutes, ss: seconds. Seconds can be a fractional
00187    value (i.e. with decimal point) */
00188 
00189 GAVL_PUBLIC
00190 int gavl_time_parse(const char * str, gavl_time_t * ret);
00191 
00192 
00193 /* Simple software timer */
00194 
00209 typedef struct gavl_timer_s gavl_timer_t;
00210 
00216 GAVL_PUBLIC
00217 gavl_timer_t * gavl_timer_create();
00218 
00226 GAVL_PUBLIC
00227 void gavl_timer_destroy(gavl_timer_t * timer);
00228 
00234 GAVL_PUBLIC
00235 void gavl_timer_start(gavl_timer_t * timer);
00236 
00242 GAVL_PUBLIC
00243 void gavl_timer_stop(gavl_timer_t * timer);
00244 
00251 GAVL_PUBLIC
00252 gavl_time_t gavl_timer_get(gavl_timer_t * timer);
00253 
00260 GAVL_PUBLIC
00261 void gavl_timer_set(gavl_timer_t * timer, gavl_time_t t);
00262 
00274 GAVL_PUBLIC
00275 uint64_t gavl_benchmark_get_time(int flags);
00276 
00284 GAVL_PUBLIC
00285 const char * gavl_benchmark_get_desc(int flags);
00286   
00287   
00288 #ifdef __cplusplus
00289 }
00290 #endif
00291 
00292 #endif /* GAVLTIME_H_INCLUDED */
00293 

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