make_denlats.sh
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#!/bin/bash
# Copyright 2012 Johns Hopkins University (Author: Daniel Povey). Apache 2.0.
# Create denominator lattices for MMI/MPE training.
# This version uses the online-nnet2 features.
#
# Creates its output in $dir/lat.*.gz
# Begin configuration section.
stage=0
nj=4
cmd=run.pl
sub_split=1
beam=13.0
lattice_beam=7.0
acwt=0.1
max_active=5000
max_mem=20000000 # This will stop the processes getting too large.
# This is in bytes, but not "real" bytes-- you have to multiply
# by something like 5 or 10 to get real bytes (not sure why so large)
num_threads=1
parallel_opts= # ignored now.
# End configuration section.
echo "$0 $@" # Print the command line for logging
[ -f ./path.sh ] && . ./path.sh; # source the path.
. parse_options.sh || exit 1;
if [ $# != 4 ]; then
echo "Usage: steps/make_denlats.sh [options] <data-dir> <lang-dir> <src-dir> <exp-dir>"
echo " e.g.: steps/make_denlats.sh data/train data/lang exp/nnet2_online/nnet_a_online exp/nnet2_online/nnet_a_denlats"
echo "Works for (delta|lda) features, and (with --transform-dir option) such features"
echo " plus transforms."
echo ""
echo "Main options (for others, see top of script file)"
echo " --config <config-file> # config containing options"
echo " --nj <nj> # number of parallel jobs"
echo " --cmd (utils/run.pl|utils/queue.pl <queue opts>) # how to run jobs."
echo " --sub-split <n-split> # e.g. 40; use this for "
echo " # large databases so your jobs will be smaller and"
echo " # will (individually) finish reasonably soon."
echo " --num-threads <n> # number of threads per decoding job"
exit 1;
fi
data=$1
lang=$2
srcdir=$3
dir=$4
for f in $data/wav.scp $lang/L.fst $srcdir/final.mdl $srcdir/conf/online_nnet2_decoding.conf; do
[ ! -f $f ] && echo "$0: expected file $f to exist" && exit 1;
done
sdata=$data/split$nj
thread_string=
[ $num_threads -gt 1 ] && thread_string="-parallel --num-threads=$num_threads"
mkdir -p $dir/log
split_data.sh $data $nj || exit 1;
echo $nj > $dir/num_jobs
utils/lang/check_phones_compatible.sh $lang/phones.txt $srcdir/phones.txt || exit 1;
oov=`cat $lang/oov.int` || exit 1;
# Compute grammar FST which corresponds to unigram decoding graph.
new_lang="$dir/"$(basename "$lang")
grep -v '^--endpoint' $srcdir/conf/online_nnet2_decoding.conf >$dir/feature.conf || exit 1;
if [ $stage -le 0 ]; then
# mkgraph.sh expects a whole directory "lang", so put everything in one directory...
# it gets L_disambig.fst and G.fst (among other things) from $dir/lang, and
# final.mdl from $srcdir; the output HCLG.fst goes in $dir/graph.
cp -rH $lang $dir/
echo "Compiling decoding graph in $dir/dengraph"
if [ -s $dir/dengraph/HCLG.fst ] && [ $dir/dengraph/HCLG.fst -nt $srcdir/final.mdl ]; then
echo "Graph $dir/dengraph/HCLG.fst already exists: skipping graph creation."
else
echo "Making unigram grammar FST in $new_lang"
cat $data/text | utils/sym2int.pl --map-oov $oov -f 2- $lang/words.txt | \
awk '{for(n=2;n<=NF;n++){ printf("%s ", $n); } printf("\n"); }' | \
utils/make_unigram_grammar.pl | fstcompile | fstarcsort --sort_type=ilabel > $new_lang/G.fst \
|| exit 1;
utils/mkgraph.sh $new_lang $srcdir $dir/dengraph || exit 1;
fi
fi
if [ -f $data/segments ]; then
# note: in the feature extraction, because the program online2-wav-dump-features is sensitive to the
# previous utterances within a speaker, we do the filtering after extracting the features.
echo "$0 [info]: segments file exists: using that."
feats="ark,s,cs:extract-segments scp:$sdata/JOB/wav.scp $sdata/JOB/segments ark:- | online2-wav-dump-features --config=$dir/feature.conf ark:$sdata/JOB/spk2utt ark,s,cs:- ark:- |"
else
echo "$0 [info]: no segments file exists, using wav.scp."
feats="ark,s,cs:online2-wav-dump-features --config=$dir/feature.conf ark:$sdata/JOB/spk2utt scp:$sdata/JOB/wav.scp ark:- |"
fi
# if this job is interrupted by the user, we want any background jobs to be
# killed too.
cleanup() {
local pids=$(jobs -pr)
[ -n "$pids" ] && kill $pids
}
trap "cleanup" INT QUIT TERM EXIT
if [ $sub_split -eq 1 ]; then
$cmd --num-threads $num_threads JOB=1:$nj $dir/log/decode_den.JOB.log \
nnet-latgen-faster$thread_string --beam=$beam --lattice-beam=$lattice_beam --acoustic-scale=$acwt \
--max-mem=$max_mem --max-active=$max_active --word-symbol-table=$lang/words.txt $srcdir/final.mdl \
$dir/dengraph/HCLG.fst "$feats" "ark:|gzip -c >$dir/lat.JOB.gz" || exit 1;
else
# each job from 1 to $nj is split into multiple pieces (sub-split), and we aim
# to have at most two jobs running at each time. The idea is that if we have stragglers
# from one job, we can be processing another one at the same time.
rm $dir/.error 2>/dev/null
prev_pid=
for n in `seq $[nj+1]`; do
if [ $n -gt $nj ]; then
this_pid=
elif [ -f $dir/.done.$n ] && [ $dir/.done.$n -nt $srcdir/final.mdl ]; then
echo "Not processing subset $n as already done (delete $dir/.done.$n if not)";
this_pid=
else
sdata2=$data/split$nj/$n/split${sub_split}utt;
split_data.sh --per-utt $sdata/$n $sub_split || exit 1;
mkdir -p $dir/log/$n
mkdir -p $dir/part
feats_subset=`echo $feats | sed "s/trans.JOB/trans.$n/g" | sed s:JOB/:$n/split${sub_split}utt/JOB/:g`
$cmd --num-threads $num_threads JOB=1:$sub_split $dir/log/$n/decode_den.JOB.log \
nnet-latgen-faster$thread_string --beam=$beam --lattice-beam=$lattice_beam --acoustic-scale=$acwt \
--max-mem=$max_mem --max-active=$max_active --word-symbol-table=$lang/words.txt $srcdir/final.mdl \
$dir/dengraph/HCLG.fst "$feats_subset" "ark:|gzip -c >$dir/lat.$n.JOB.gz" || touch $dir/.error &
this_pid=$!
fi
if [ ! -z "$prev_pid" ]; then # Wait for the previous job; merge the previous set of lattices.
wait $prev_pid
[ -f $dir/.error ] && echo "$0: error generating denominator lattices" && exit 1;
rm $dir/.merge_error 2>/dev/null
echo Merging archives for data subset $prev_n
for k in `seq $sub_split`; do
gunzip -c $dir/lat.$prev_n.$k.gz || touch $dir/.merge_error;
done | gzip -c > $dir/lat.$prev_n.gz || touch $dir/.merge_error;
[ -f $dir/.merge_error ] && echo "$0: Merging lattices for subset $prev_n failed (or maybe some other error)" && exit 1;
rm $dir/lat.$prev_n.*.gz
touch $dir/.done.$prev_n
fi
prev_n=$n
prev_pid=$this_pid
done
fi
echo "$0: done generating denominator lattices."