Re: CR: Change system time has impact on Helix playback on Symbian

Also it would be a good idea to run a performance check
after
the switch. GetTickCount is called *A LOT* and very small
changes in the performance of that function can result in
large changes in user perceived performance. Just in
case....

--greg.


Gang.Jianokia.com wrote:
> "Nokia submits this code under the terms of a
commercial contribution 
> agreement with RealNetworks,
> and I am authorized to contribute this code under said
agreement."
> 
> Modified by:  Gang.Jianokia.com
> 
> Reviewed by:
> 
> Date: 3/25/2007
> 
> Project: SymbianMmf_rel
> 
> ErrorId:  ECZU-7AJDAB
> 
> Synopsis: CR: Change system time has impact on Helix
playback on Symbian
> 
> Overview: On Symbian platform the GetTickCount() uses
gettimeofday() to 
> get the tick count. That
> introduces the impact of the system clock and system
clock time can be 
> changed in cases like
> daylight saving time change. The solution is to use a
real tick counter 
> in Symbian -
> User::NTickCount(). Normally it will give 1ms time
resolution on 
> hardware and 5ms on the emulator.
> 
> 
> Root Cause of the problem:  Implementation.
> 
> Files Added:   None.
> 
> Files Modified:
> /build/umakecf/symbian.cf
> /client/common/system/hxsched.cpp
> /common/system/platform/symbian/gettickcount.c
> 
> Image Size and Heap Use impact: no major impact
> 
> Module Release testing (STIF) :  Passed.
> 
> Test case(s) Added  :  N/A.
> 
> Memory leak check performed : Yes. No new leaks
introduced
> 
> Platforms and Profiles Build Verified:
helix-client-s60-50-mmf-mdf-arm
> 
> Platforms and Profiles Functionality verified: armv5
& winscw
> 
> Branch: 210CayS & Head
> 
> <<diff.txt>>
> 
> 
>
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> 
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> Common-devhelixcommunity.org
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on-dev


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