Voip application using winmm.dll make unity not responding

Hi,

I am trying to convert a VOIP application into unity application

https://www.codeproject.com/Articles/482735/TCP-Audio-Streamer-and-Player-Voice-Chat-over-IP

,and there is a code for the timer which is basically a high precision timer implement using winmm.dll.

starting the Timer:

Code (CSharp):

1.  
2. global::WinSound.Win32.TimeCaps tc = new global::WinSound.Win32.TimeCaps();
3. global::WinSound.Win32.TimeGetDevCaps(ref tc,                       (uint)Marshal.SizeOf(typeof(global::WinSound.Win32.TimeCaps)));
4.  m_ResolutionInMilliseconds = Math.Max(tc.wPeriodMin, 0);
5.  
6. global::WinSound.Win32.TimeBeginPeriod(m_ResolutionInMilliseconds);
7.  
8. m_TimerId = global::WinSound.Win32.TimeSetEvent(m_Milliseconds, m_ResolutionInMilliseconds, m_DelegateTimeEvent, ref m_UserData, (UInt32)Win32.TIME_PERIODIC);
9.  
10. if (m_TimerId > 0)
11.  {
12.         m_GCHandleTimer = GCHandle.Alloc(m_TimerId, GCHandleType.Pinned);
13.         m_IsRunning = true;
14.   }
15.  
16.  

and stop the timer:

Code (CSharp):

1.  
2. global:: WinSound.Win32.TimeKillEvent(m_TimerId);
3. global::WinSound.Win32.TimeEndPeriod(m_ResolutionInMilliseconds);
4. if (m_GCHandleTimer.IsAllocated)
5. {
6.          m_GCHandleTimer.Free();
7. }
8.  

but global:: WinSound.Win32.TimeKillEvent(m_TimerId); is somehow making unity not responding, if i try to rerun by going into the play mode again or try to quit the editor.

I also tried CreateTimerQueueTimer after reading the MSDN documentation but same result.

starting the Timer:

Code (CSharp):

1.  
2.  
3. global::WinSound.Win32.TimeBeginPeriod(m_ResolutionInMilliseconds);
4.  
5. m_HandleTimerQueue = global::WinSound.Win32.CreateTimerQueue();
6. m_GCHandleTimerQueue = GCHandle.Alloc(m_HandleTimerQueue);
7.  
8.            
9.  bool resultCreate = global::WinSound.Win32.CreateTimerQueueTimer(out m_HandleTimer, m_HandleTimerQueue, m_DelegateTimerProc, IntPtr.Zero, dueTimeInMilliseconds, m_Milliseconds,
10. global::WinSound.Win32.WT_EXECUTEINTIMERTHREAD);
11.  
12.  if (resultCreate)
13.  {
14.         m_GCHandleTimer = GCHandle.Alloc(m_HandleTimer, GCHandleType.Pinned);
15.         m_IsRunning = true;
16.  }
17.  

Stoping the Timer:

Code (CSharp):

1.  
2. global:: WinSound.Win32.DeleteTimerQueueTimer(IntPtr.Zero, m_HandleTimer, IntPtr.Zero);
3.  
4. global::WinSound.Win32.TimeEndPeriod(m_ResolutionInMilliseconds);
5.  
6. if (m_HandleTimerQueue != IntPtr.Zero)
7. {
8.      global::WinSound.Win32.DeleteTimerQueue(m_HandleTimerQueue);
9. }
10.  
11. if (m_GCHandleTimer.IsAllocated)
12. {
13.      m_GCHandleTimer.Free();
14. }
15.  
16. if (m_GCHandleTimerQueue.IsAllocated)
17. {
18.     m_GCHandleTimerQueue.Free();
19. }
20.  
21.  

this time on instruction global::WinSound.Win32.DeleteTimerQueue(m_HandleTimerQueue);

anyone has any idea why ?

 

I have the same problem with winmm timers. Did you find a solution?

 

Can you vote for the bug https://issuetracker.unity3d.com/is...entering-play-mode-after-the-object-disposing ? Hope it will help to bring Unity team attention to the problem with winmm timers.