On Sat, 07 May 2011 10:38:03 +0100, Richard Shann wrote:
> No, it's just me - Nils understood you and told me on irc #denemo There
> are no commands yet to construct MIDI shortcuts (still less built-in
> methods), so you have to write a bit of scheme to do it. The hook for
> this is in denemo.scm and that was where I placed my bit of scheme this
> morning.
> This is the sort of thing you can see in denemo.scm
>
> (define Pitchbend::commandUp "(d-CursorRight)")
??? Why isn't the value of commandUp a function? Isn't that the whole point
of functional programming? :-)
> If you redefined Pitchbend::commandUp to be some other string that would
> be executed on the getting the Pitchbend up message from MIDI-in. Only a
> few of these control messages have been named in denemo.scm so far.
>
> This itself is a layer over the primitive response to MIDI in's control
> messages.
> The primitive level is that when a control message is received the
> procedure MIDI-shortcut::controller is executed and if the value it
> returns is the name of a denemo action this is action is performed.
> (Well, I have just trawled through the code to find this out. It needed
> writing down somewhere!)
Urghs! Just had a glance at the c code. Why are you going back and forth to
_strings_ - this is so TCLish ... Why not use scm_apply_<n> od scm_call_<n>?
For example get_midi_control_command could be written like this (of course, I'd
prefer it to take SCM values as input and return a SCM function value ...):
gchar *get_midi_control_command(guchar type, guchar value) {
static SCM lookup_fun = scm_c_lookup("MIDI-shortcut::controller");
gchar r_val = NULL;
SCM res;
scm_dynwind_begin(0);
res = scm_call_2(lookup_fun, SCM_I_MAKINUM(type), SCM_I_MAKINUM(value));
if(scm_is_string(res)) {
SCM2LSTRING(r_val, res);
}
scm_dynwind_end();
return r_val;
}
Cheers, RalfD
> HTH
> Richard
>
>
>
>
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