opl: Change library to use us instead of ms.

Multi-track MIDI files are played back using separate callback chains
for each track, and this introduces the possibility of one track
becoming out of sync with the others. This was noticeable in WADs
that use multi-track MIDIs, such as Alien Vendetta. Increase the
timing resolution to microsecond precision to fix this.

1 files changed, 1 insertions, 3 deletions

diff --git a/opl/opl_timer.h b/opl/opl_timer.h
index 73544013..adf81503 100644
--- a/opl/opl_timer.h
+++ b/opl/opl_timer.h
@@ -22,9 +22,7 @@
 
 int OPL_Timer_StartThread(void);
 void OPL_Timer_StopThread(void);
-void OPL_Timer_SetCallback(unsigned int ms,
-                           opl_callback_t callback,
-                           void *data);
+void OPL_Timer_SetCallback(uint64_t us, opl_callback_t callback, void *data);
 void OPL_Timer_ClearCallbacks(void);
 void OPL_Timer_Lock(void);
 void OPL_Timer_Unlock(void);