* keyboard". Any "piano keyboard" key knows its own octave and
* accidental already. */
int keyboard_octave;
-
- int midi_fd;
snd_midi_event_t *snd_midi_event;
mnemon_t mnemon;
}
#endif
+typedef struct
+{
+ scherzo_t *scherzo;
+ int fd;
+} scherzo_midi_closure_t;
+
static int
on_midi_input (unused (GIOChannel *channel),
unused (GIOCondition condition),
void *user_data)
{
+ scherzo_midi_closure_t *closure = user_data;
unsigned char buf[MIDI_BUF_SIZE], *next;
- scherzo_t *scherzo = user_data;
+ scherzo_t *scherzo = closure->scherzo;
+ int fd = closure->fd;
ssize_t remaining;
snd_seq_event_t event;
- remaining = read (scherzo->midi_fd, buf, MIDI_BUF_SIZE);
+ remaining = read (fd, buf, MIDI_BUF_SIZE);
next = buf;
while (remaining) {
return TRUE;
}
+static void *
+listen_to_alsa_midi (void *data)
+{
+ scherzo_midi_closure_t *closure = data;
+ int out_fd = closure->fd;
+ snd_rawmidi_t *midi_in;
+ unsigned char buf[MIDI_BUF_SIZE];
+ ssize_t bytes;
+ int err;
+
+ err = snd_rawmidi_open (&midi_in, NULL, "virtual", 0);
+ if (err) {
+ fprintf (stderr, "Failed to open virtual MIDI handle.");
+ return NULL;
+ }
+
+ while (1) {
+ bytes = snd_rawmidi_read (midi_in, buf, MIDI_BUF_SIZE);
+ write (out_fd, buf, bytes);
+ }
+
+ return NULL;
+}
+
int
main (int argc, char *argv[])
{
GtkWidget *drawing_area;
+ GIOChannel *channel;
scherzo_t scherzo;
+ int alsa_midi_fd[2];
+ scherzo_midi_closure_t midi_out, alsa_midi_in, alsa_midi_out;
int err;
srand (time (NULL));
}
#define MIDI_DEVICE "/dev/midi1"
- scherzo.midi_fd = open (MIDI_DEVICE, O_RDONLY);
- if (scherzo.midi_fd < 0) {
- printf ("failed to open " MIDI_DEVICE ". Midi input will not be available.\n");
- } else {
- GIOChannel *channel;
- channel = g_io_channel_unix_new (scherzo.midi_fd);
+ midi_out.scherzo = &scherzo;
+ midi_out.fd = open (MIDI_DEVICE, O_RDONLY);
+ if (midi_out.fd < 0) {
+ printf ("Failed to open " MIDI_DEVICE ". You will need to connect a MIDI device.\n");
+ } else {
+ channel = g_io_channel_unix_new (midi_out.fd);
g_io_channel_set_encoding (channel, NULL, NULL);
- g_io_add_watch (channel, G_IO_IN, on_midi_input, &scherzo);
+ g_io_add_watch (channel, G_IO_IN, on_midi_input, &midi_out);
}
+ pipe (alsa_midi_fd);
+
+ alsa_midi_in.scherzo = &scherzo;
+ alsa_midi_in.fd = alsa_midi_fd[1];
+ g_thread_new ("scherzo-vmidi", listen_to_alsa_midi, &alsa_midi_in);
+
+ alsa_midi_out.scherzo = &scherzo;
+ alsa_midi_out.fd = alsa_midi_fd[0];
+ channel = g_io_channel_unix_new (alsa_midi_out.fd);
+ g_io_channel_set_encoding (channel, NULL, NULL);
+ g_io_add_watch (channel, G_IO_IN, on_midi_input, &alsa_midi_out);
+
scherzo.window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size (GTK_WINDOW (scherzo.window), 1000, 600);