cst_utterance *default_pause_insertion(cst_utterance *u)
{
/* Add initial silences and silence at each phrase break */
const char *silence;
const cst_item *w;
cst_item *p, *s;
silence = val_string(feat_val(u->features,"silence"));
/* Insert initial silence */
s = relation_head(utt_relation(u,"Segment"));
if (s == NULL)
s = relation_append(utt_relation(u,"Segment"),NULL);
else
s = item_prepend(s,NULL);
item_set_string(s,"name",silence);
for (p=relation_head(utt_relation(u,"Phrase")); p; p=item_next(p))
{
for (w = item_last_daughter(p); w; w=item_prev(w))
{
s = path_to_item(w,"R:SylStructure.daughtern.daughtern.R:Segment");
if (s)
{
s = item_append(s,NULL);
item_set_string(s,"name",silence);
break;
}
}
}
return u;
}
static const cst_val *sub_phrases(const cst_item *syl)
{
const cst_item *s;
int c;
for (c=0,s=path_to_item(syl,"R:SylStructure.parent.R:Phrase.parent.p");
s && (c < CST_CONST_INT_MAX);
s=item_prev(s),c++);
return val_string_n(c);
}
static const cst_val *syl_in(const cst_item *syl)
{
/* Number of syllables since last major break */
const cst_item *ss,*p,*fs;
int c;
ss = item_as(syl,"Syllable");
fs = path_to_item(syl,"R:SylStructure.parent.R:Phrase.parent.daughter.R:SylStructure.daughter");
for (c=0, p=ss;
p && (c < CST_CONST_INT_MAX);
p=item_prev(p),c++)
if (item_equal(p,fs))
break;
return val_string_n(c);
}
static const cst_val *ssyl_out(const cst_item *syl)
{
/* Number of stressed syllables until last major break */
const cst_item *ss,*p,*fs;
int c;
ss = item_as(syl,"Syllable");
fs = path_to_item(syl,"R:SylStructure.parent.R:Phrase.parent.daughtern.R:SylStructure.daughtern");
for (c=0, p=item_next(ss);
p && (c < CST_CONST_INT_MAX);
p=item_next(p))
{
if (cst_streq("1",item_feat_string(p,"stress")))
c++;
if (item_equal(p,fs))
break;
}
return val_string_n(c); /* its used randomly as int and float */
}
static const cst_val *ssyl_in(const cst_item *syl)
{
/* Number of stressed syllables since last major break */
const cst_item *ss,*p,*fs;
int c;
ss = item_as(syl,"Syllable");
fs = path_to_item(syl,"R:SylStructure.parent.R:Phrase.parent.daughter.R:SylStructure.daughter");
/* This should actually include the first syllable, but Festival's
doesn't. */
for (c=0, p=item_prev(ss);
p && (!item_equal(p,fs)) && (c < CST_CONST_INT_MAX);
p=item_prev(p))
{
if (cst_streq("1",item_feat_string(p,"stress")))
c++;
}
return val_string_n(c); /* its used randomly as int and float */
}
cst_item* flite_path_to_item(const cst_item *item,const char *featpath)
{
return path_to_item(item,featpath);
}
