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egs/mini_librispeech/s5/local/download_lm.sh
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#!/bin/bash
# Copyright 2014 Vassil Panayotov
# 2017 Daniel Povey
# Apache 2.0
if [ $# -ne "3" ]; then
echo "Usage: $0 <base-url> <download_dir> <local?"
echo "e.g.: $0 http://www.openslr.org/resources/11 ./corpus/ data/local/lm"
exit 1
fi
base_url=$1
dst_dir=$2
local_dir=$3
# given a filename returns the corresponding file size in bytes
# The switch cases below can be autogenerated by entering the data directory and running:
# for f in *; do echo "\"$f\") echo \"$(du -b $f | awk '{print $1}')\";;"; done
function filesize() {
case $1 in
"3-gram.arpa.gz") echo "759636181";;
"3-gram.pruned.1e-7.arpa.gz") echo "34094057";;
"3-gram.pruned.3e-7.arpa.gz") echo "13654242";;
"librispeech-lexicon.txt") echo "5627653";;
"librispeech-vocab.txt") echo "1737588";;
*) echo "";;
esac
}
function check_and_download () {
[[ $# -eq 1 ]] || { echo "check_and_download() expects exactly one argument!"; return 1; }
fname=$1
echo "Downloading file '$fname' into '$dst_dir'..."
expect_size="$(filesize $fname)"
[[ ! -z "$expect_size" ]] || { echo "Unknown file size for '$fname'"; return 1; }
if [[ -s $dst_dir/$fname ]]; then
# In the following statement, the first version works on linux, and the part
# after '||' works on Linux.
f=$dst_dir/$fname
fsize=$(set -o pipefail; du -b $f 2>/dev/null | awk '{print $1}' || stat '-f %z' $f)
if [[ "$fsize" -eq "$expect_size" ]]; then
echo "'$fname' already exists and appears to be complete"
return 0
else
echo "WARNING: '$fname' exists, but the size is wrong - re-downloading ..."
fi
fi
wget --no-check-certificate -O $dst_dir/$fname $base_url/$fname || {
echo "Error while trying to download $fname!"
return 1
}
f=$dst_dir/$fname
# In the following statement, the first version works on linux, and the part after '||'
# works on Linux.
fsize=$(set -o pipefail; du -b $f 2>/dev/null | awk '{print $1}' || stat '-f %z' $f)
[[ "$fsize" -eq "$expect_size" ]] || { echo "$fname: file size mismatch!"; return 1; }
return 0
}
mkdir -p $dst_dir $local_dir
for f in 3-gram.arpa.gz 3-gram.pruned.1e-7.arpa.gz 3-gram.pruned.3e-7.arpa.gz \
librispeech-vocab.txt librispeech-lexicon.txt; do
check_and_download $f || exit 1
done
dst_dir=$(readlink -f $dst_dir)
ln -sf $dst_dir/3-gram.pruned.1e-7.arpa.gz $local_dir/lm_tgmed.arpa.gz
ln -sf $dst_dir/3-gram.pruned.3e-7.arpa.gz $local_dir/lm_tgsmall.arpa.gz
ln -sf $dst_dir/3-gram.arpa.gz $local_dir/lm_tglarge.arpa.gz
ln -sf $dst_dir/librispeech-lexicon.txt $local_dir/librispeech-lexicon.txt
ln -sf $dst_dir/librispeech-vocab.txt $local_dir/librispeech-vocab.txt
exit 0
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