timer: refactor, add 64 bit timer function

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.

1 files changed, 14 insertions, 16 deletions

diff --git a/osdep/timer-win2.c b/osdep/timer-win2.c
index 88a047410d..99980d76bc 100644
--- a/osdep/timer-win2.c
+++ b/osdep/timer-win2.c
@@ -22,27 +22,25 @@
 #include <mmsystem.h>
 #include "timer.h"
 
-// Returns current time in microseconds
-unsigned int GetTimer(void)
+void mp_sleep_us(int64_t us)
 {
-  return timeGetTime() * 1000;
+    if (us < 0)
+        return;
+    // Sleep(0) won't sleep for one clocktick as the unix usleep
+    // instead it will only make the thread ready
+    // it may take some time until it actually starts to run again
+    if (us < 1000)
+        us = 1000;
+    Sleep(us / 1000);
 }
 
-// Returns current time in milliseconds
-unsigned int GetTimerMS(void)
+uint64_t mp_raw_time_us(void)
 {
-  return timeGetTime() ;
+    return timeGetTime() * 1000;
 }
 
-int usec_sleep(int usec_delay){
-  // Sleep(0) won't sleep for one clocktick as the unix usleep
-  // instead it will only make the thread ready
-  // it may take some time until it actually starts to run again
-  if(usec_delay<1000)usec_delay=1000;
-  Sleep( usec_delay/1000);
-  return 0;
-}
-
-void InitTimer(void)
+void mp_raw_time_init(void)
 {
+    // request 1ms timer resolution
+    timeBeginPeriod(1);
 }