libvgm
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ValleyBell
Add new MAME FM cores
Aaron Giles' rewrite of the old MAME FM cores was recently merged in the last MAME release.
It is supposedly more accurate than the previous cores, and also has a more liberal license (BSD-3-clause instead of GPL).
I think it would be good to include it in libvgm, although it would probably need a lot of work to remove the "C++-isms" to port it to C.
I'll probably go with just porting the C++ versions over as they are. (except for making it more C++98 compatible maybe) As long as there is a C interface, I think this is fine.
I think I prefer plain C to C++ just in order to avoid a dependency on libstdc++ and templates causing the binary size to balloon. But if you're able to avoid that, then I think it would be fine.
Plain C would be my preferrence. (I recently ran into trouble with C++ libs and MSVC.) But I think just to get started, C++ would be fine as well.
I would like to share the work I'm doing with this cores: https://github.com/LeonardoDemartino/mame_fm_bsd_cores I have extracted the main parts of the cores and removed any dependencies whatsoever with the rest of the MAME classes and structures (it was a pain to do this). YM2612, YM2151 and YM2610 are working fine.
Feel free to use it and/or improve it.
By now Aaron made the cores more selfcontained: https://github.com/aaronsgiles/ymfm
