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* timer: add utility function to get relative timewm42014-02-281-0/+11
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* timer: init only oncewm42014-02-101-1/+8
| | | | | | | | | | This avoids trouble if another mpv instance is initialized in the same process. Since timeBeginPeriod/timeEndPeriod are hereby not easily matched anymore, use an atexit() handler to call timeEndPeriod, so that we can be sure these calls are matched, even if we allow multiple initializations later when introducing the client API.
* Replace calls to usec_sleep()wm42013-05-261-6/+0
| | | | | | This is just dumb sed replacement to mp_sleep_us(). Also remove the now unused usec_sleep() wrapper.
* Replace all calls to GetTimer()/GetTimerMS()wm42013-05-261-10/+0
| | | | | | | | | | | | | | | | | | | | | | GetTimer() is generally replaced with mp_time_us(). Both calls return microseconds, but the latter uses int64_t, us defined to never wrap, and never returns 0 or negative values. GetTimerMS() has no direct replacement. Instead the other functions are used. For some code, switch to mp_time_sec(), which returns the time as double float value in seconds. The returned time is offset to program start time, so there is enough precision left to deliver microsecond resolution for at least 100 years. Unless it's casted to a float (or the CPU reduces precision), which is why we still use mp_time_us() out of paranoia in places where precision is clearly needed. Always switch to the correct time. The whole point of the new timer calls is that they don't wrap, and storing microseconds in unsigned int variables would negate this. In some cases, remove wrap-around handling for time values.
* timer: refactor, add 64 bit timer functionwm42013-05-261-0/+82
Make OS specific timer code export a mp_raw_time_us() function, and add generic implementations of GetTimer()/GetTimerMS() using this function. New mpv code is supposed to call mp_time_us() in situations where precision is absolutely needed, or mp_time_s() otherwise. Make it so that mp_time_us() will return a value near program start. We don't set it to 0 though to avoid confusion with relative vs. absolute time. Instead, pick an arbitrary offset. Move the test program in timer-darwin.c to timer.c, and modify it to work with the generic timer functions.