about vpbe leftMargin

Hank wang

I am trying to modify the sample code from http://www-s.ti.com/sc/techlit/spraap3.zip with the document spraap3a How to Use the VPBE and VPFE driver.

there are vid0, vid1, osd0 and cursor windows combined in the output.

I modified to vid0 and vid1 with vid0 is captured from camera and vid1 is the same as the sample(DSP logo).

vid1-window size: 146*146 with RGB888 format

vid0-window size: 720*480 with YUV format

but the result is not correct, there is a bias at window hight of 146

I try to modify the parameter leftMargin in PSP_VPBEOsdConfigParams setting

the result is better, but still not correct

could someone tell me what happened? (The sample code used the leftMargin, too)

ths a lot

BR,Hank

over 14 years ago

0 MattLipsey over 14 years ago

Genius 3575 points

I'm pretty sure RGB888 windows need to have a line width that is a multiple of 32 pixels. 146 pixel width does not meet that requirement. Try changing your width to a multiple of 32 and see if that helps.

0 Hank wang over 14 years ago in reply to MattLipsey

Prodigy 80 points

MattLipsey,

Thanks for your reminders. I have made that mistake before but not this time.

The works shown above is set by pitch 448(146*3=438, multiple of 32 will be 448).

Thanks for your response.

BR,

Hank

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about vpbe leftMargin