Very simple ogg player for Dingoo native.
Plays test.ogg in the same directory as the executable.
Exit with Start+Select.

Sound is not perfect, because it needs buffering!
This is just a basic sample.

If you want to make a player or something, you might want to check
samplerate etc, since it can differ between different ogg files!
You can use ov_info() and then update the values for waveout with pcm_ioctl().