Jpeg Decoder for DM365 seems to ignore parameter setting

Jonathan Hunter

I have dvsdk_3_10_00_12 for the git linux kernal. I wanted to make use of the rotation parameters that were included with the JPEG decoder. I was able to get the decoder to accept the 90, 180, and 270 degree rotation, but resulting yuv file is always returned in UYVY format no matter what -oColorSpace parameter I enter. To be sure I didnt mess anything up i tried using the standard executable available in the dmai_2_10_00_06/packages/ti/sdo/dmai/apps/image_decode_io1/ directory. It still seems that no matter what I enter for the output format the codec forces the UYVY format.

over 16 years ago

0 Yashwant Dutt over 16 years ago

TI__Genius 17215 points

Hi,

I will check this issue with DVSDK and the 3P which gives this codec. Please give us few days.

regards

Yashwant

0 Sajesh Kumar Saran over 16 years ago in reply to Yashwant Dutt

TI__Intellectual 1840 points

Hi,

It looks like a DMAI issue.

DMAI always sets params.forceChromaFormat as XDM_DEFAULT if the oColorSpace != ColorSpace_UYVY.

Regards

Sajesh

0 Jonathan Hunter over 16 years ago in reply to Sajesh Kumar Saran

TI__Prodigy 170 points

I saw that in the application code, so I made a copy and tried to modify it. I tried to set it to XDM_YUV_420P or any of the other XDM_ settings but when I try this, it tells me that it cannot create the image decoder or does not support the format.

0 Sajesh Kumar Saran over 16 years ago in reply to Jonathan Hunter

TI__Intellectual 1840 points

The codec supports 422ILE and 420SP in DM365. The 422ILE is already supported by the application. For 420SP, you need to make changes to application and also idec1.c.

0 Jonathan Hunter over 16 years ago in reply to Sajesh Kumar Saran

TI__Prodigy 170 points

Ok. The last thing I wanted to ask to make sure I am doing this correctly. I use YUVSequenceViewer.exe to view a YUV image. I take that YUV file feed it to the jpeg encoder and can create a jpeg in either 422P or 420P format. When I try to take these jpeg files, decode them, and view them in the YUV viewer, the results are nothing similar to the original. Would you mind testing this process as well? Especially for the decoder side after giving it a jpeg to decode, does the YUV result look correct and what YUV viewer did you use?

I use the standard "image_encode_io1_dm365.x470MV" and the "image_decode_io1_dm365.x470MV" executeables from dmai.

Thanks

0 Sajesh Kumar Saran over 16 years ago in reply to Jonathan Hunter

TI__Intellectual 1840 points

If the output is selected as UYVY, it is supported in current build. We will be adding support for 420SP in next release. The DM365 codec does not support other formats.

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Jpeg Decoder for DM365 seems to ignore parameter setting