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/*
* This file is part of mpv.
*
* mpv is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* mpv 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MPLAYER_TIMER_H
#define MPLAYER_TIMER_H
#include <inttypes.h>
#include "config.h"
// Initialize timer, must be called at least once at start.
void mp_time_init(void);
// Return time in nanoseconds. Never wraps. Never returns negative values.
int64_t mp_time_ns(void);
// Return time in nanoseconds. Coverts raw time in nanoseconds to mp time, subtracts init offset.
int64_t mp_time_ns_from_raw_time(uint64_t raw_time);
// Return time in seconds. Can have down to 1 nanosecond resolution, but will
// be much worse when casted to float.
double mp_time_sec(void);
// Provided by OS specific functions (timer-linux.c)
void mp_raw_time_init(void);
// ensure this doesn't return 0
uint64_t mp_raw_time_ns(void);
// Sleep in nanoseconds.
void mp_sleep_ns(int64_t ns);
#if HAVE_DARWIN
// Coverts mach time to raw time in nanoseconds and returns it.
uint64_t mp_raw_time_ns_from_mach(uint64_t mach_time);
#endif
#ifdef _WIN32
// returns: timer resolution in ns if needed and started successfully, else 0
int64_t mp_start_hires_timers(int64_t wait_ns);
// call unconditionally with the return value of mp_start_hires_timers
void mp_end_hires_timers(int64_t resolution_ns);
#endif /* _WIN32 */
// Converts time units to nanoseconds (int64_t)
#define MP_TIME_S_TO_NS(s) ((s) * INT64_C(1000000000))
#define MP_TIME_MS_TO_NS(ms) ((ms) * INT64_C(1000000))
#define MP_TIME_US_TO_NS(us) ((us) * INT64_C(1000))
// Converts nanoseconds to specified time unit (double)
#define MP_TIME_NS_TO_S(ns) ((ns) / (double)1000000000)
#define MP_TIME_NS_TO_MS(ns) ((ns) / (double)1000000)
#define MP_TIME_NS_TO_US(ns) ((ns) / (double)1000)
// Add a time in seconds to the given time in nanoseconds, and return it.
// Takes care of possible overflows. Never returns a negative or 0 time.
int64_t mp_time_ns_add(int64_t time_ns, double timeout_sec);
#endif /* MPLAYER_TIMER_H */
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