Re: [Audio-dev] CR-Client: Increase calls to OnTimeSync from Symbian.

[Liam Murray]

Whenever that timer goes off we ask the audio device for the samples played 
count. I'm not sure how costly that call is. It possibly involves a context 
switch if CMMFDevSound actually asks the audio device for the count 
whenever SamplesPlayed() is called. Some of my recent changes resulted in 
us calling this a bit more frequently and I was wondering about the cost of 
these calls. Just something to keep in mind. We probably can look at the 
time it takes to get the audio time and if it seems significant we can ask 
for the actual time less frequently and estimate times in between based on 
the tick count.

Liam
At 08:50 AM 4/20/2005, Greg Wright wrote:
The core uses calls back from audio devices to help get work
done outside of the Sync timer that also drives the core. Since
we do not have a core thread on Symbian I would like to increase
the frequency of OnTimeSync calls into the core.
HEAD, 150Cay, 201Cay.
--greg.
Index: platform/symbian/audsymbian.cpp
===================================================================
RCS file: /cvsroot/audio/device/platform/symbian/audsymbian.cpp,v
retrieving revision 1.29.2.1
diff -u -w -r1.29.2.1 audsymbian.cpp
--- platform/symbian/audsymbian.cpp     30 Mar 2005 20:58:41 
-0000      1.29.2.1
+++ platform/symbian/audsymbian.cpp     20 Apr 2005 15:47:40 -0000
@@ -65,7 +65,7 @@
 static UINT32 Scale(UINT32 v, UINT32 f0, UINT32 f1, UINT32 t0, UINT32 t1);

 // interval between generated calls to OnTimeSync
-const UINT32 TIMESYNC_CALLBACK_INTERVAL_MS = 100;
+const UINT32 TIMESYNC_CALLBACK_INTERVAL_MS = 30;
 CHXAudioDevice::CHXAudioDevice()
     : CActive(EPriorityHigh),
_______________________________________________
Audio-dev mailing list
Audio-dev@helixcommunity.org
http://lists.helixcommunity.org/mailman/listinfo/audio-dev

_______________________________________________
Audio-dev mailing list
Audio-dev@helixcommunity.org
http://lists.helixcommunity.org/mailman/listinfo/audio-dev