/**
* Rewinds the SMF. What that means is, after calling this routine, smf_get_next_event
* will return first event in the song.
*/
void
smf_rewind(smf_t *smf)
{
int i;
smf_track_t *track = NULL;
smf_event_t *event;
assert(smf);
smf->last_seek_position = 0.0;
for (i = 1; i <= smf->number_of_tracks; i++) {
track = smf_get_track_by_number(smf, i);
assert(track != NULL);
if (track->number_of_events > 0) {
track->next_event_number = 1;
event = smf_peek_next_event_from_track(track);
assert(event);
track->time_of_next_event = event->time_pulses;
} else {
track->next_event_number = -1;
track->time_of_next_event = 0;
#if 0
g_warning("Warning: empty track.");
#endif
}
}
}
static int
cmd_track(char *arg)
{
int num;
if (arg == NULL) {
if (selected_track == NULL)
g_message("No track currently selected.");
else
g_message("Currently selected is track number %d, containing %d events.",
selected_track->track_number, selected_track->number_of_events);
} else {
if (smf->number_of_tracks == 0) {
g_message("There are no tracks.");
return (-1);
}
num = parse_track_number(arg);
if (num < 0)
return (-1);
selected_track = smf_get_track_by_number(smf, num);
if (selected_track == NULL) {
g_critical("smf_get_track_by_number() failed, track not selected.");
return (-3);
}
selected_event = NULL;
g_message("Track number %d selected; it contains %d events.",
selected_track->track_number, selected_track->number_of_events);
}
return (0);
}
/**
* Detaches track from the smf.
*/
void
smf_track_remove_from_smf(smf_track_t *track)
{
int i, j;
smf_track_t *tmp;
smf_event_t *ev;
assert(track->smf != NULL);
track->smf->number_of_tracks--;
assert(track->smf->tracks_array);
g_ptr_array_remove(track->smf->tracks_array, track);
/* Renumber the rest of the tracks, so they are consecutively numbered. */
for (i = track->track_number; i <= track->smf->number_of_tracks; i++) {
tmp = smf_get_track_by_number(track->smf, i);
tmp->track_number = i;
/*
* Events have track numbers too. I guess this wasn't a wise
* decision. ;-/
*/
for (j = 1; j <= tmp->number_of_events; j++) {
ev = smf_track_get_event_by_number(tmp, j);
ev->track_number = i;
}
}
track->track_number = -1;
track->smf = NULL;
}
/**
* Searches for track that contains next event, in time order. In other words,
* returns the track that contains event that should be played next.
* \return Track with next event or NULL, if there are no events left.
*/
smf_track_t *
smf_find_track_with_next_event(smf_t *smf)
{
int i;
size_t min_time = 0;
smf_track_t *track = NULL, *min_time_track = NULL;
/* Find track with event that should be played next. */
for (i = 1; i <= smf->number_of_tracks; i++) {
track = smf_get_track_by_number(smf, i);
assert(track);
/* No more events in this track? */
if (track->next_event_number == 0)
continue;
if (track->time_of_next_event < min_time || min_time_track == NULL) {
min_time = track->time_of_next_event;
min_time_track = track;
}
}
return (min_time_track);
}
static int
ui_load_state(ui_t *ui, char *filename)
{
int i;
smf_t *smf;
smf_event_t *event;
smf_track_t *track;
jack_nframes_t frame;
if (!filename) {
ui->filename = ui_get_filename(ui, ".", "Load file: ");
}
if (ui->filename) {
smf = smf_load(ui->filename);
if (!smf) {
free(ui->filename);
ui->filename = NULL;
return 0;
}
ui_send_clear(ui, ui->pattern);
for (i = 0; i < 8; i++) {
track = smf_get_track_by_number(smf, i + 1);
if (!track) {
continue;
}
while ((event = smf_track_get_next_event(track))) {
if (smf_event_is_metadata(event)
|| event->midi_buffer[0] == NOTEOFF) {
continue;
}
frame = ui_seconds_to_nframes(ui, event->time_seconds);
ui_send_add(ui, event->midi_buffer[1], event->midi_buffer[2],
frame ? frame / (88200 / ui->steps) + 1 : 0, MAX_LEN, i);
}
}
smf_delete(smf);
}
return 1;
}
CAMLprim value ocaml_smf_get_track_by_number(value smf, value trackno)
{
CAMLparam2(smf, trackno);
CAMLlocal1(ret);
Track_t *t;
t = malloc(sizeof(Track_t));
t->t = smf_get_track_by_number(Smf_val(smf), Int_val(trackno));
if(t->t == NULL)
{
free(t);
/* Error */
t = NULL;
smf_err(0);
}
ret = caml_alloc_custom(&track_ops, sizeof(Track_t*), 1, 0);
Track_t_val(ret) = t;
CAMLreturn(ret);
}
static int
cmd_trackrm(char *arg)
{
int num = parse_track_number(arg);
if (num < 0)
return (-1);
if (selected_track != NULL && num == selected_track->track_number) {
selected_track = NULL;
selected_event = NULL;
}
smf_track_delete(smf_get_track_by_number(smf, num));
g_message("Track %d removed.", num);
return (0);
}
/**
* \return Length of SMF, in pulses.
*/
int
smf_get_length_pulses(const smf_t *smf)
{
int pulses = 0, i;
for (i = 1; i <= smf->number_of_tracks; i++) {
smf_track_t *track;
smf_event_t *event;
track = smf_get_track_by_number(smf, i);
assert(track);
event = smf_track_get_last_event(track);
/* Empty track? */
if (event == NULL)
continue;
if (event->time_pulses > pulses)
pulses = event->time_pulses;
}
return (pulses);
}
/**
* \return Length of SMF, in seconds.
*/
double
smf_get_length_seconds(const smf_t *smf)
{
int i;
double seconds = 0.0;
for (i = 1; i <= smf->number_of_tracks; i++) {
smf_track_t *track;
smf_event_t *event;
track = smf_get_track_by_number(smf, i);
assert(track);
event = smf_track_get_last_event(track);
/* Empty track? */
if (event == NULL)
continue;
if (event->time_seconds > seconds)
seconds = event->time_seconds;
}
return (seconds);
}
