Compiler/TDA4VMXEVM: Utilization of VPAC/DMPAC for generic Image Processing.

Sriram Raghunathan

Part Number: TDA4VMXEVM

Tool/software: TI C/C++ Compiler

Hi,

On studying through the VPAC (In particular the MSC) TIVX Kernel we could find that it is specifically designed to support an image format i.e NV12, RGB. If we've a different format other than that of the supported list from the pdk/hwa. How to start developing/getting support for this?

For ex: YUYV is the input image format and we'd like to use VPAC_MSC to scale the input image down a size. We've the kernel developed, of course it did'nt work on going through more details of this. The way to develope a VPAC kernel is different since it works closely with the FVID2 layer and controlled by the configuration params.

The question here would be.

1. Can we support a different format other than the ones available within the SDK to use the VPAC/DMPAC h/w accelerators?

2. If so, how? If not, any other alternative other than changing the camera formats

Sriram,

Visteon Corporation

over 5 years ago

0 Brijesh Jadav over 5 years ago

TI__Guru**** 454475 points

Hi Sriram,

YUV422 format is not supported in VPAC MSC.

So could you please help me understand what operation you want to do?

Regards,

Brijesh

0 Sriram Raghunathan over 5 years ago in reply to Brijesh Jadav

Prodigy 45 points

Hi Brijesh,

Thanks for the reply, the format which I'm interested in is YUYV. I think I posted the question twice, anyways continuining here.

* May I know why scaling an YUYV format is not possible with VPAC, is it a hardware accelerator configuration? Or it's from the context of TI does'nt officially support this from software?

* Could you suggest a way for the same?

Sriram

0 Brijesh Jadav over 5 years ago in reply to Sriram Raghunathan

TI__Guru**** 454475 points

Hi Sriram,

This is HW limitation, that it does not support YUV422 interleaved format.

Rgds,

Brijesh

0 Sriram Raghunathan over 5 years ago in reply to Brijesh Jadav

Prodigy 45 points

Hi Brijesh,

Thanks for the reply. Is there a document explaining these details about the formats the VPAC/DMPAC supports? (I looked at the TI-Docs, and sdk sources. Was going around a bit).

Sriram

0 Brijesh Jadav over 5 years ago in reply to Sriram Raghunathan

TI__Guru**** 454475 points

Hi Sriram,

This information should be available in VPAC/DMPAC documents. I think it is also available in OpenVX Node documentation.

Rgds,

Brijesh

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Compiler/TDA4VMXEVM: Utilization of VPAC/DMPAC for generic Image Processing.