DaninFuchs Wrote:Also, interesting facts there, though I suspect it's not firmware-limited speeds on photo, etc, as much as that they likely use the second chipset within the PSP (as they do for MP3s, etc - and as SNES9x TYL does for its sound) to handle it.

Hardware decoding is possible I guess, but it seems to slow to me to actually be hardware decoded.  Considering that the PSP can easily decode AVC compressed video at around 70fps on a 222MHz clock, whilst decoding an MP3 stream (not hardware decoded)...  Also, the PSP is quite capable of playing back 480x272 MJPEG[AVI] videos at 30fps @ 222MHz.
True, the streams may be organised better, (haven't really looked into format of video streams or pictures) but the PSP shouldn't be decoding at a significantly slower speed for photos.

I think parts of the process may be done via hardware, for example, zlib inflation during PNG rendering.