ExternalPrograms/Spliter/Spliter.C

   1 //Copyright (c) 2002-2003 Nasca Octavian Paul
   2 //License: GNU GPL 2
   3
   4 #include "Spliter.h"
   5 #include <stdio.h>
   6
   7 pthread_mutex_t mutex;
   8 int Pexitprogram;
   9
  10 Spliter::Spliter(){
  11     //init
  12     Psplitpoint=60;
  13     Pchin=0;
  14     Pchout1=0;
  15     Pchout2=1;
  16     Poct1=0;
  17     Poct2=0;
  18     //ALSA init
  19     snd_seq_open(&midi_in,"default",SND_SEQ_OPEN_INPUT,0);
  20     snd_seq_open(&midi_out,"default",SND_SEQ_OPEN_OUTPUT,0);
  21
  22     char portname[50];sprintf(portname,"Spliter IN");
  23     int alsaport = snd_seq_create_simple_port(midi_in,portname
  24                     ,SND_SEQ_PORT_CAP_WRITE | SND_SEQ_PORT_CAP_SUBS_WRITE
  25                     ,SND_SEQ_PORT_TYPE_SYNTH);
  26     sprintf(portname,"Spliter OUT");
  27     alsaport = snd_seq_create_simple_port(midi_out,portname
  28                     ,SND_SEQ_PORT_CAP_READ | SND_SEQ_PORT_CAP_SUBS_READ
  29                     ,SND_SEQ_PORT_TYPE_SYNTH);
  30
  31
  32 };
  33
  34 Spliter::~Spliter(){
  35     snd_seq_close(midi_in);
  36     snd_seq_close(midi_out);
  37 };
  38
  39 // This splits the Midi events from one channel to another two channels
  40 void Spliter::midievents(){
  41     snd_seq_event_t *midievent;
  42     midievent=NULL;
  43     snd_seq_event_input(midi_in,&midievent);
  44
  45     if (midievent==NULL) return;
  46     if  ((midievent->type==SND_SEQ_EVENT_NOTEON)||(midievent->type==SND_SEQ_EVENT_NOTEOFF)){
  47         int cmdchan=midievent->data.note.channel;
  48         if (cmdchan==Pchin){
  49         snd_seq_ev_set_subs(midievent);
  50         snd_seq_ev_set_direct(midievent);
  51         if (midievent->data.note.note<Psplitpoint) {
  52             midievent->data.note.channel=Pchout1;
  53             int tmp=midievent->data.note.note;
  54             tmp+=Poct1*12;if (tmp>127) tmp=127;if (tmp<0) tmp=0;
  55             midievent->data.note.note=tmp;
  56             } else {
  57             midievent->data.note.channel=Pchout2;
  58             int tmp=midievent->data.note.note;
  59             tmp+=Poct2*12;if (tmp>127) tmp=127;if (tmp<0) tmp=0;
  60             midievent->data.note.note=tmp;
  61             };
  62         snd_seq_event_output_direct(midi_out,midievent);
  63         } else {
  64         snd_seq_ev_set_subs(midievent);
  65         snd_seq_ev_set_direct(midievent);
  66         snd_seq_event_output_direct(midi_out,midievent);
  67         };
  68
  69     };
  70     snd_seq_free_event(midievent);
  71 };
  72