Does MFX_IMPL_SOFTWARE support colour format conversion?

[Kamal_Devanga]

Hi,

I've created a decoder with MFX_IMPL_SOFTWARE and have a VPP component that does the following:   

    p.vpp.In.FourCC = MFX_FOURCC_NV12; 
    p.vpp.Out.FourCC = MFX_FOURCC_YUY2;

, i.e. it converts the decoder output (which is NV12) to YUY2 before I grab the data and send it off elsewhere.  This conversion happens no problem with MFX_IMPL_HARDWARE with an Intel HD.  Software doesn't appear to perform the conversion (my image is split, green and pink/purple and about 1/4 size).  I replaced my D3D11 allocator with a SysMem one, just in case that was doing something but no dice.  It made no difference.

Will MFX_IMPL_SOFTWARE perform these conversions or do we need to do them ourselves?  Btw, I'm diligently examining return codes for errors and everything appears to be working fine (no errors).

Note: Something odd about use of libmfxsw32.dll, if your code is debug the dispatcher looks for libmfxsw32_d.dll but this isn't shipped with the SDK and there's no way to build it.  Renaming the existing libmfxsw32.dll to libmfxsw32_d.dll allows you to link however.

[Jiandong_Z_Intel]

Hi There,

Are you using the most new graphic driver ?

Can you share log from system_analyzer tool located at (mediasdk/tools/analyzer) ?  This will help provide us your system details. 

I suggest use HW solution if possible. 

Thanks,

Zachary

[Kamal_Devanga]

Thank you for your reply.  I've attached the analysis. 

We specify equipment to customers, however we want to cover the case where Intel HD isn't present and/or is an older, unsupported version (for us), with a software decoder.  Hence the experiments with MFX_IMPL_SOFTWARE.

Driver version is 20.19.15.4463.  Note the 4600 is enabled in bios and is a secondary adapter.  But as I say, we want our system to "just work" regardless of whether the HD is present/enabled or not.

[Jiandong_Z_Intel]

From Table 2: Color Conversion Support in VPP* page 7 in Intel® Media SDK Developer Reference， NV12 to YUY2 is not support.

You may also interesting in Intel® IPP Library (https://software.intel.com/en-us/intel-ipp)‎, there are functions can help to do NV12 to YUY2.

Thanks

Zachary

[Kamal_Devanga]

Jiandong Z. (Intel) wrote:

From Table 2: Color Conversion Support in VPP* page 7 in Intel® Media SDK Developer Reference， NV12 to YUY2 is not support.

Sorry, I'm a bit confused.  Looking at the table there's an X in the NV12/YUY2 element.  Our system works for MFX_IMPL_HARDWARE.  Both YUY2 -> NV12 on encode and NV12 to YUY2 on decode.  That is to say VPP -> Encode and on the other end Decode -> VPP.  We're passing in YUY2 and getting out YUY2.  I checked both the input and output bitmaps with rawpixels.net.  The developer reference doesn't say there's a difference between MFX_IMPL_HARDWARE and MFX_IMPL_SOFTWARE.

Am I misunderstanding something?