23 Dec
2009
23 Dec
'09
1:30 p.m.
On Wednesday, December 23, 2009, Jens M Andreasen wrote:
Suppose you wanted a soft-synth to be instantly
playable at startup
(given the option: '--autoconnect') then what would be the ALSA
functions for:
1) Saving the current "live" connection at exit (if any.)
2) Restoring the above (saved information.)
/j
I suppose that you mean the functions used by an alsa sequencer client program
of any kind. I think that saving/restoring connections has more sense for
players/recorders than softsynths.
Using plain libasound API, the functions:
snd_seq_connect_from() and snd_seq_connect_to() to make the conenctions,
snd_seq_disconnect_to() and snd_seq_disconnect_from() to disconnect,
you will need also snd_seq_parse_address() to transform the address in string
form into a pair of client:port numbers.
It is practical to save the address as a string "name:port_number", instead of
saving the client number, because the numbers are likely going to change the
next time you start your programs, and the function snd_seq_parse_address()
is able to translate the client names into the corresponding client numbers.
For instance, this is taken from my VMPK current .config file:
[Connections]
InPort=KMidimon:0
OutPort=MidiSport 2x2:0
Regards,
Pedro