static int
cmd_ppqn(char *new_ppqn)
{
int tmp;
char *end;
if (new_ppqn == NULL) {
g_message("Pulses Per Quarter Note (aka Division) is %d.", smf->ppqn);
} else {
tmp = strtol(new_ppqn, &end, 10);
if (end - new_ppqn != strlen(new_ppqn)) {
g_critical("Invalid PPQN, garbage characters after the number.");
return (-1);
}
if (tmp <= 0) {
g_critical("Invalid PPQN, valid values are greater than zero.");
return (-2);
}
if (smf_set_ppqn(smf, tmp)) {
g_message("smf_set_ppqn failed.");
return (-3);
}
g_message("Pulses Per Quarter Note changed to %d.", smf->ppqn);
}
return (0);
}
/**
* Allocates new smf_t structure.
* \return pointer to smf_t or NULL.
*/
smf_t *
smf_new(void)
{
int cantfail;
smf_t *smf = malloc(sizeof(smf_t));
if (smf == NULL) {
g_critical("Cannot allocate smf_t structure: %s", strerror(errno));
return (NULL);
}
memset(smf, 0, sizeof(smf_t));
smf->tracks_array = g_ptr_array_new();
assert(smf->tracks_array);
smf->tempo_array = g_ptr_array_new();
assert(smf->tempo_array);
cantfail = smf_set_ppqn(smf, 120);
assert(!cantfail);
cantfail = smf_set_format(smf, 0);
assert(!cantfail);
smf_init_tempo(smf);
return (smf);
}
