mORMot Open Source

Hi Arnaud,

I can confirm that jpegdec works well for 90% of the jpeg images. It would be very nice to add the SSE/SSE2 IDCT assembler code in NativeJpg, since some ppl stated that it is about 30% faster than the 8x8 IDCT version of the Independent Jpeg Group (IJG), which NativeJpg uses.

However, the Delphi debugger I use is very barebones, so the debugging of asm is really a pain (eg the Delphi7 debugger tells me that 02CH is 2, while I thought 2C hex is 2x16+12=44, for example). Therefore I cannot reliably extract *just* the IDCT part(s) of jpegdec. I have for now put this idea in  the fridge.

If you have ideas on how to separate the IDCT code so the jpegdec IDCT can be just a drop-in replacement, please tell me.

Kind regards, Nils