#include <stdlib.h>
#include <stdio.h>
short synth_destination, client_destination;
unsigned int time_marker;
#define TEMPO 120
unsigned int note_duration = 60000 / TEMPO;
unsigned int weak_note = 33;
unsigned int strong_note = 34;
unsigned int pattern_size = 4;
void
void
schedule_noteon (int chan, short key, unsigned int ticks)
{
fluid_event_set_source (ev, -1);
fluid_event_set_dest (ev, synth_destination);
fluid_event_noteon (ev, chan, key, 127);
fluid_sequencer_send_at (sequencer, ev, ticks, 1);
delete_fluid_event (ev);
}
void
schedule_timer_event ()
{
fluid_event_set_source (ev, -1);
fluid_event_set_dest (ev, client_destination);
fluid_event_timer (ev, NULL);
fluid_sequencer_send_at (sequencer, ev, time_marker, 1);
delete_fluid_event (ev);
}
void
schedule_pattern ()
{
int i, note_time;
note_time = time_marker;
for (i = 0; i < pattern_size; ++i) {
schedule_noteon (9, i ? weak_note : strong_note, note_time);
note_time += note_duration;
}
time_marker = note_time;
}
void
{
schedule_timer_event ();
schedule_pattern ();
}
void
usage (char* prog_name)
{
printf ("Usage: %s soundfont.sf2 [beats [tempo]]\n", prog_name);
printf ("\t(optional) beats: number of pattern beats, default %d\n",
pattern_size);
printf ("\t(optional) tempo: BPM (Beats Per Minute), default %d\n", TEMPO);
}
int
main (int argc, char *argv[])
{
int n;
settings = new_fluid_settings ();
if (argc < 2) {
usage (argv[0]);
} else {
synth = new_fluid_synth (settings);
audiodriver = new_fluid_audio_driver (settings, synth);
sequencer = new_fluid_sequencer ();
synth_destination = fluid_sequencer_register_fluidsynth (sequencer,
synth);
client_destination = fluid_sequencer_register_client (sequencer,
"fluidsynth_metronome", sequencer_callback, NULL);
n = fluid_synth_sfload (synth, argv[1], 1);
if (n != -1) {
if (argc > 2) {
n = atoi (argv[2]);
if (n > 0) pattern_size = n;
}
if (argc > 3) {
n = atoi (argv[3]);
if (n > 0) note_duration = 60000 / n;
}
time_marker = fluid_sequencer_get_tick (sequencer);
schedule_pattern ();
schedule_timer_event ();
schedule_pattern ();
printf ("press <Enter> to stop\n");
n = getchar ();
}
delete_fluid_sequencer (sequencer);
delete_fluid_audio_driver (audiodriver);
delete_fluid_synth (synth);
}
delete_fluid_settings (settings);
return 0;
}