It's a pity nobody took the free sources of Atari jpeg decoder and made a JPEG datatype. On slow cpus like 030 it should allow faster jpeg decoding...
Is it a DSP thing, then?
One problem with the delfina is that the amount of memory on the device is limited. As is the bandwidth to it. I suppose some jpeg stuff could be offloaded, say processing a few blocks at a time (whatever will fit in the available memory) but you might end up trading CPU<->memory bound performance for CPU<->clockport bound performance.
