Hook notifying you when a new sample buffer becomes available.
If set, this function is called by the input driver whenever a new sample
buffer becomes available, at which point you can use read_sound_input()
to copy the data into a more permanent location. It runs in an interrupt
context, so it must execute very quickly, the code and all memory that it
touches must be locked, and you cannot call any operating system routines
or access disk files. This currently works only under DOS.
The following projects include source code containing this keyword: