Hi :
This is my usecase on DM8148.
I'm want to do Image recognition on A8 side .
Capture (YUV422I) HD/FHD
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CAP_DUP_LINK_IDX
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DEI
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VIP-SC YUV420
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FRAME OUT(VPSS)
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Frames In A8
Now ,I can get frame on A8 side , and i copy frame to other buffer.
Please refer to the steps
1.using mmap that create a virtaddr.
2.do memcpy(other_buffer , virtaddr , (1920*1080)<<2);
3.I measured time , memcpy used 350~400ms. <i can't believe , it's too long>
Question:
1.Why memcpy used a long time?
2.How should i do can improve effective?