ffdshow version (1 Viewer)

[Anonymous]

For the development of the ffdshow installation wizard, which version should we be installing? Standard, SSE or SSE2? Or should it be user selectable?

 

[gabbe]

Hi, it depends on what cpu You have.
P4 (not the oldest?) and AMD64 can use SSE2
PIII, (oldest P4??) and AMD XP can use SSE
Other should use std fddshow.

Best is to use a sse / sse2 detecting algoritm and choose there after. But I think the user should be able to override the choise.

 

[Anonymous]

Best is to use a sse / sse2 detecting algoritm and choose there after.

Got any Open-Souce code examples available?

 

[MrMario64]

why not make it manually selectable with default as standard.
And explain in the installer what the other choices r for?

ofcourse, autodetect would be fine to.

 

[gabbe]

From this link http://www.codeproject.com/cpp/sseintro.asp?select=568493&df=100&forumid=16168&exp=0
Detection of SSE Support
SSE instructions may be used if they are supported by the processor. The Visual C++ CPUID sample [4] shows how to detect support of the SSE, MMX and other processor features. It is done using the cpuid Assembly command. See details in this sample and in the Intel Software manuals [1].
SSETest Demo Project
http://www.codeproject.com/cpp/sseintro.asp?select=568493&df=100&forumid=16168&exp=0

And here is somethin about cpuid

http://www.paradicesoftware.com/specs/cpuid/index.htm

But use only any detection to present a choise for the user. He must be able to override it with an other ffdshow version or even cancel an installation of it.

 

[Anonymous]

Hi,

Found a prefect sample to use. (c++)
http://download.microsoft.com/downl...99-3e005872c1be/debugging_crt_debug_cpuid.exe

C:\temp\Debug>cpuid.exe
v_name: GenuineIntel
model: Unknown
family: 6
model: 13
stepping: 6
feature: 00000007
yes _CPU_FEATURE_MMX
yes _CPU_FEATURE_SSE
yes _CPU_FEATURE_SSE2
no _CPU_FEATURE_3DNOW
os_support: 00000007
yes _CPU_FEATURE_MMX
yes _CPU_FEATURE_SSE
yes _CPU_FEATURE_SSE2
no _CPU_FEATURE_3DNOW
checks: 0000000f


Can some one convert this to dll or COM?

/ac

 

[samuel337]

The easier way is to simply access WMI using C#.

See these articles for more details:

http://blogs.msdn.com/oldnewthing/archive/2004/10/21/245652.aspx
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/wmisdk/wmi/win32_processor.asp

The first article gives code examples, the 2nd article tells you how to access information about processor features.

Sam