Is it a DSP thing, then?
Falcon used a 32Mhz 56001 while Delfina used a faster 56002 running up to 73Mhz.
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.
The DSP has access to 96KB of local ram, I think it's enough to process the jpeg chunks. A 640x480 Ham8 screen just takes 300KB so there shouldn't be a bandwitch problem
I think A1200 Clockport can transfer 300KB/s without many problems, I think DSP may help with c2p and HAM8 conversion. With Zorro based Delfinas it would be even faster (let's say 1.8MB/s without choking the system)
I guess that using A1200 clockport a 060 may be faster but with slower cpus or ZorroII the DSP could win.
here's the link to the sources of Falcon030 JPEG Decoder (v0.81 1993):
http://gfa.atari-users.net/docs/files/jpegd.zipThese are the sources of the mp3Delfina player (perhaps some routines are more optimized for 56002):
http://aminet.net/package/mus/play/dmdev
