dm365 resizer support for YUV420PSEMI input in single shot mode

abins

Prodigy 85 points

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We want to use the resizer on DM365 to resize the output of the MPEG4/H.264 decoder before displaying the decoded data.

We are using the below software components: -

1. Montavista LSP with 2.6.18 Kernel for davinci

2. DVDSK 2.10.00 Build 12

We have enabled the IPIPE and resizer option in the kernel menu config. We are also passing the “dm365_imp.oper_mode=1” boot argument to the kernel to operate the resize in single shot mode.

The problem is that the MPEG4/H.264 decoder output is in YUV420PSEMI format. However the resizer driver dm365_ipipe.c does not support the IPIPE_YUV420SP format.

I tried the patches and sample code posted by Anshuman on http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/100/p/7583/29898.aspx, however it doesn’t seem to work. People have obviously used the resizer for doing this, but I can’t find a working code.

Does anybody have the code for converting YUV420SP input resized to another YUV420SP output using resizer in single shot mode?

Regards,

Abins

over 14 years ago

0 abins over 14 years ago

Prodigy 85 points

The sample code is works. I was using the sample code to resize a DMAI buffer. I had made a mistake of assuming that the input buffer had the Y and UV components one after the other. However It is not contiguous buffer if the total image size is less that the buffer size. The DMAI stores the UV component at an offset of 2/3 times the total buffer size. After changing the UV pointer source the resizer works correctly. Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

0 Anshuman Saxena over 14 years ago in reply to abins

TI__Mastermind 19985 points

Hi Abnis,

Thanks for the confirmation.

For the other users, just wanted to point that the patch in LSP 2.10 for YUV420 to YUV420 support has worked over here. In LSP3.10, this patch should already be there in the main tree.

Regards,

Anshuman

PS: Please mark this post as verified, if you think it has answered your question. Thanks.

0 Anshuman Saxena over 14 years ago in reply to Anshuman Saxena

TI__Mastermind 19985 points

Hi,

Verifying answers on user's behalf as he could not see the Verify Answer on his menu.

Regards,

Anshuman

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dm365 resizer support for YUV420PSEMI input in single shot mode