Keep the ALSA sequencer port information used by the GUI in sync with the...

Keep the ALSA sequencer port information used by the GUI in sync with the actual device configuration. Fixes #203.

pd/src/s_midi_alsa.c

@@ -32,6 +32,7 @@ static snd_seq_t *midi_handle;
 
 static snd_midi_event_t *midiev;
 
+void midi_alsa_setndevs(int in, int out);
 
 void sys_alsa_do_open_midi(int nmidiin, int *midiinvec,
     int nmidiout, int *midioutvec)
@@ -45,6 +46,7 @@ void sys_alsa_do_open_midi(int nmidiin, int *midiinvec,
 
     alsa_nmidiin = 0;
     alsa_nmidiout = 0;
+    midi_alsa_setndevs(alsa_nmidiin, alsa_nmidiout);
 
     if (nmidiout == 0 && nmidiin == 0) return;
 
@@ -105,6 +107,10 @@ void sys_alsa_do_open_midi(int nmidiin, int *midiinvec,
     snd_midi_event_new(ALSA_MAX_EVENT_SIZE,&midiev);
     alsa_nmidiout = nmidiout;
     alsa_nmidiin = nmidiin;
+    // We need to keep the ALSA devices list (midi_alsa_getdevs) in sync with
+    // the actual device config. Not sure why this table (used by the GUI)
+    // uses its own device counts. -ag
+    midi_alsa_setndevs(alsa_nmidiin, alsa_nmidiout);
 
     return;
  error:
@@ -218,6 +224,7 @@ void sys_alsa_poll_midi(void)
 void sys_alsa_close_midi()
 {
     alsa_nmidiin = alsa_nmidiout = 0;
+    midi_alsa_setndevs(alsa_nmidiin, alsa_nmidiout);
     if(midi_handle)
       {
         snd_seq_close(midi_handle);