For me it is hard to judge how much different the DM355/DM365 MPEG4/JPEG Coprocessor is from a C64+ DSP. At least I can see the possibility to update DM355/DM365 codecs, as TI provided several codec releases for the various DVSDKs over last the last years. The packages in the dm355_codecs_03_10_00_02 (also valid for dm365_codecs_03_10_00_07) look similar to the file formats resulting when building custom packages for C64+ DSP – that is the reason why I assume it should be possible to create custom codecs myself even for DM355 / DM365 using the same tools.
Additional questions:
- Is there a document which describes the MPEG4/JPEG Coprocessor a little more in detail?
- What are the differences between the DM355/DM365 codecs (binary packages) and the resulting binary files for C64+ DSP from the last the step of "Porting GPP code to DSP and Codec Engine"?