fisher_create_test_lang.sh
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#!/bin/bash
#
if [ -f path.sh ]; then . ./path.sh; fi
mkdir -p data/lang_test
arpa_lm=data/local/lm/3gram-mincount/lm_unpruned.gz
[ ! -f $arpa_lm ] && echo No such file $arpa_lm && exit 1;
mkdir -p data/lang_test
cp -r data/lang/* data/lang_test
# grep -v '<s> <s>' etc. is only for future-proofing this script. Our
# LM doesn't have these "invalid combinations". These can cause
# determinization failures of CLG [ends up being epsilon cycles].
# Note: remove_oovs.pl takes a list of words in the LM that aren't in
# our word list. Since our LM doesn't have any, we just give it
# /dev/null [we leave it in the script to show how you'd do it].
gunzip -c "$arpa_lm" | \
grep -v '<s> <s>' | \
grep -v '</s> <s>' | \
grep -v '</s> </s>' | \
arpa2fst - | fstprint | \
utils/remove_oovs.pl /dev/null | \
utils/eps2disambig.pl | utils/s2eps.pl | fstcompile --isymbols=data/lang_test/words.txt \
--osymbols=data/lang_test/words.txt --keep_isymbols=false --keep_osymbols=false | \
fstrmepsilon | fstarcsort --sort_type=ilabel > data/lang_test/G.fst
fstisstochastic data/lang_test/G.fst
echo "Checking how stochastic G is (the first of these numbers should be small):"
fstisstochastic data/lang_test/G.fst
## Check lexicon.
## just have a look and make sure it seems sane.
echo "First few lines of lexicon FST:"
fstprint --isymbols=data/lang/phones.txt --osymbols=data/lang/words.txt data/lang/L.fst | head
echo Performing further checks
# Checking that G.fst is determinizable.
fstdeterminize data/lang_test/G.fst /dev/null || echo Error determinizing G.
# Checking that L_disambig.fst is determinizable.
fstdeterminize data/lang_test/L_disambig.fst /dev/null || echo Error determinizing L.
# Checking that disambiguated lexicon times G is determinizable
# Note: we do this with fstdeterminizestar not fstdeterminize, as
# fstdeterminize was taking forever (presumbaly relates to a bug
# in this version of OpenFst that makes determinization slow for
# some case).
fsttablecompose data/lang_test/L_disambig.fst data/lang_test/G.fst | \
fstdeterminizestar >/dev/null || echo Error
# Checking that LG is stochastic:
fsttablecompose data/lang/L_disambig.fst data/lang_test/G.fst | \
fstisstochastic || echo "[log:] LG is not stochastic"
echo "$0 succeeded"