mirror of
https://github.com/mpv-player/mpv
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64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* mpv is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MPLAYER_TIMER_H
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#define MPLAYER_TIMER_H
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#include <inttypes.h>
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// Initialize timer, must be called at least once at start.
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void mp_time_init(void);
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// Return time in nanoseconds. Never wraps. Never returns negative values.
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int64_t mp_time_ns(void);
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// Return time in seconds. Can have down to 1 nanosecond resolution, but will
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// be much worse when casted to float.
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double mp_time_sec(void);
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// Provided by OS specific functions (timer-linux.c)
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void mp_raw_time_init(void);
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// ensure this doesn't return 0
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uint64_t mp_raw_time_ns(void);
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// Sleep in nanoseconds.
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void mp_sleep_ns(int64_t ns);
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#ifdef _WIN32
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// returns: timer resolution in ms if needed and started successfully, else 0
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int mp_start_hires_timers(int wait_ms);
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// call unconditionally with the return value of mp_start_hires_timers
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void mp_end_hires_timers(int resolution_ms);
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#endif /* _WIN32 */
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// Converts time units to nanoseconds (int64_t)
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#define MP_TIME_S_TO_NS(s) ((s) * INT64_C(1000000000))
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#define MP_TIME_MS_TO_NS(ms) ((ms) * INT64_C(1000000))
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#define MP_TIME_US_TO_NS(us) ((us) * INT64_C(1000))
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// Converts nanoseconds to specified time unit (double)
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#define MP_TIME_NS_TO_S(ns) ((ns) / (double)1000000000)
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#define MP_TIME_NS_TO_MS(ns) ((ns) / (double)1000000)
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#define MP_TIME_NS_TO_US(ns) ((ns) / (double)1000)
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// Add a time in seconds to the given time in nanoseconds, and return it.
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// Takes care of possible overflows. Never returns a negative or 0 time.
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int64_t mp_time_ns_add(int64_t time_ns, double timeout_sec);
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#endif /* MPLAYER_TIMER_H */
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