IPU does not handle transformation and composition in single task

[denizdayan]

I created an IPU task using IPU API as below:

   ...
    task.input.width    = 1920;
    task.input.height   = 1080;
    task.input.format   = v4l2_fourcc('U', 'Y', 'V', 'Y');

    // Overlay image size and format
    task.overlay.width    = 1920;
    task.overlay.height   = 1080;
    task.overlay.format   = v4l2_fourcc('R', 'G', 'B', 'A');
    task.overlay_en       = 1;   // ENABLE COMPOSITION
    task.overlay.alpha.mode      = 1; 
    task.overlay.alpha.gvalue    = 0;
    task.overlay.colorkey.enable = 0;
    task.overlay.colorkey.value  = 0;

    // Output image size and format
    task.output.width   = 1920;
    task.output.height  = 1080;
    task.output.format  = v4l2_fourcc('I', '4', '2', '0');
...

But the output image seems wrong. (Describing it may help: shapes are distinguishable but it is distorted and pink). Is there a limitation about color-space conversion and composition in IPU or/and IPU API?

I have tried performing same task with other formats (for example UYVY-RGBA->RGBA) and there was no problem. Also I have tried to split it into two tasks, again the result was good but total operation time is almost doubled.

As a side question, Where can I find information about the standard operation times for IPU? I couldn't find it on IPU documents.

Thanks in advance.

[igorpadykov]

Hi denizdayan

may be useful to look at

ipu-examples - i.MX IPU Examples 

and gstreamer examples in sect.7.3.15 Video conversion, 7.3.16 Video composition

atatched Linux Guide. I am afraid there is no information about the standard

operation times for IPU.

Best regards
igor
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