tv.h

Go to the documentation of this file.

/*
 * FILE:     tv.h
 * AUTHOR:   Colin Perkins <csp@csperkins.org>
 * MODIFIED: Ladan Gharai <ladan@isi.edu>
 *
 * Copyright (c) 2001-2003 University of Southern California
 * Copyright (c) 2005-2023 CESNET z.s.p.o.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 * 
 *      This product includes software developed by the University of Southern
 *      California Information Sciences Institute.
 * 
 * 4. Neither the name of the University nor of the Institute may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
 * EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
 
#ifndef TV_H_8332A958_38EB_4FE7_94E6_22C71BECD013
#define TV_H_8332A958_38EB_4FE7_94E6_22C71BECD013
 
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
 
#ifdef __cplusplus
#include <cstdint>
#include <ctime>
#else
#include <stdint.h>
#include <time.h>
#endif
 
#ifndef _MSC_VER
#include <sys/time.h>
#endif
 
#ifdef __cplusplus
extern "C" {
#endif
 
uint32_t get_local_mediatime_offset(void);
uint32_t get_local_mediatime(void);
 
void     ts_add_nsec(struct timespec *ts, long long offset);
 
double   tv_diff(struct timeval curr_time, struct timeval prev_time);
uint32_t tv_diff_usec(struct timeval curr_time, struct timeval prev_time);
void     tv_add(struct timeval *ts, double offset_secs);
void     tv_add_usec(struct timeval *ts, long long offset);
int      tv_gt(struct timeval a, struct timeval b);
uint32_t get_std_audio_local_mediatime(double samples, int rate);
uint32_t get_std_video_local_mediatime(void);
 
typedef long long time_ns_t;
#define MS_IN_NS      1000000
#define MS_IN_NS_DBL 1000000.0
#define MS_IN_SEC 1000
#define MS_IN_SEC_DBL 1000.0
#define US_IN_SEC 1000000LL
#define US_IN_NS 1000LL
#define US_IN_SEC_DBL ((double) US_IN_SEC)
#define NS_IN_SEC 1000000000LL
#define NS_IN_SEC_DBL ((double) NS_IN_SEC)
#define NS_IN_US (NS_IN_SEC/US_IN_SEC)
#define NS_IN_US_DBL ((double) NS_IN_US)
#define US_TO_MS(val_us) ((val_us) / 1000)
#define MS_TO_US(val_ms) ((val_ms) * 1000)
#define NS_TO_MS(val_ns) ((val_ns) / 1000 / 1000)
#define MS_TO_NS(val_ms) ((val_ms) * 1000)
 
static inline time_ns_t get_time_in_ns() {
#ifdef HAVE_TIMESPEC_GET
        struct timespec ts = { 0, 0 };
        timespec_get(&ts, TIME_UTC);
        return ts.tv_sec * NS_IN_SEC + ts.tv_nsec;
#else
        struct timeval tv = { 0, 0 };
        gettimeofday(&tv, NULL);
        return tv.tv_sec * NS_IN_SEC + tv.tv_usec * NS_IN_US;
#endif
}
 
// old macOS compat
#if !defined HAVE_TIMESPEC_GET
#ifndef TIME_UTC
#define TIME_UTC 1
#endif
int timespec_get(struct timespec *ts, int base);
#endif
 
#ifdef __cplusplus
}
#endif
 
#endif // ! defined TV_H_8332A958_38EB_4FE7_94E6_22C71BECD013