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dataprep.py
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dataprep.py
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#!/usr/bin/python
#-*- coding: utf-8 -*-
# The script downloads the VoxCeleb datasets and converts all files to WAV.
# Requirement: ffmpeg and wget running on a Linux system.
import argparse
import os
import subprocess
import pdb
import hashlib
import time
import glob
import tarfile
from zipfile import ZipFile
from tqdm import tqdm
from scipy.io import wavfile
## ========== ===========
## Parse input arguments
## ========== ===========
parser = argparse.ArgumentParser(description = "VoxCeleb downloader");
parser.add_argument('--save_path', type=str, default="data", help='Target directory');
parser.add_argument('--user', type=str, default="user", help='Username');
parser.add_argument('--password', type=str, default="pass", help='Password');
parser.add_argument('--download', dest='download', action='store_true', help='Enable download')
parser.add_argument('--extract', dest='extract', action='store_true', help='Enable extract')
parser.add_argument('--convert', dest='convert', action='store_true', help='Enable convert')
parser.add_argument('--augment', dest='augment', action='store_true', help='Download and extract augmentation files')
args = parser.parse_args();
## ========== ===========
## MD5SUM
## ========== ===========
def md5(fname):
hash_md5 = hashlib.md5()
with open(fname, "rb") as f:
for chunk in iter(lambda: f.read(4096), b""):
hash_md5.update(chunk)
return hash_md5.hexdigest()
## ========== ===========
## Download with wget
## ========== ===========
def download(args, lines):
for line in lines:
url = line.split()[0]
md5gt = line.split()[1]
outfile = url.split('/')[-1]
## Download files
out = subprocess.call('wget %s --user %s --password %s -O %s/%s'%(url,args.user,args.password,args.save_path,outfile), shell=True)
if out != 0:
raise ValueError('Download failed %s. If download fails repeatedly, use alternate URL on the VoxCeleb website.'%url)
## Check MD5
md5ck = md5('%s/%s'%(args.save_path,outfile))
if md5ck == md5gt:
print('Checksum successful %s.'%outfile)
else:
raise Warning('Checksum failed %s.'%outfile)
## ========== ===========
## Concatenate file parts
## ========== ===========
def concatenate(args,lines):
for line in lines:
infile = line.split()[0]
outfile = line.split()[1]
md5gt = line.split()[2]
## Concatenate files
out = subprocess.call('cat %s/%s > %s/%s' %(args.save_path,infile,args.save_path,outfile), shell=True)
## Check MD5
md5ck = md5('%s/%s'%(args.save_path,outfile))
if md5ck == md5gt:
print('Checksum successful %s.'%outfile)
else:
raise Warning('Checksum failed %s.'%outfile)
out = subprocess.call('rm %s/%s' %(args.save_path,infile), shell=True)
## ========== ===========
## Extract zip files
## ========== ===========
def is_within_directory(directory, target):
abs_directory = os.path.abspath(directory)
abs_target = os.path.abspath(target)
prefix = os.path.commonprefix([abs_directory, abs_target])
return prefix == abs_directory
def safe_extract(tar, path=".", members=None, *, numeric_owner=False):
for member in tar.getmembers():
member_path = os.path.join(path, member.name)
if not is_within_directory(path, member_path):
raise Exception("Attempted Path Traversal in Tar File")
tar.extractall(path, members, numeric_owner=numeric_owner)
def full_extract(args, fname):
print('Extracting %s'%fname)
if fname.endswith(".tar.gz"):
with tarfile.open(fname, "r:gz") as tar:
safe_extract(tar, args.save_path)
elif fname.endswith(".zip"):
with ZipFile(fname, 'r') as zf:
zf.extractall(args.save_path)
## ========== ===========
## Partially extract zip files
## ========== ===========
def part_extract(args, fname, target):
print('Extracting %s'%fname)
with ZipFile(fname, 'r') as zf:
for infile in zf.namelist():
if any([infile.startswith(x) for x in target]):
zf.extract(infile,args.save_path)
# pdb.set_trace()
# zf.extractall(args.save_path)
## ========== ===========
## Convert
## ========== ===========
def convert(args):
files = glob.glob('%s/voxceleb2/*/*/*.m4a'%args.save_path)
files.sort()
print('Converting files from AAC to WAV')
for fname in tqdm(files):
outfile = fname.replace('.m4a','.wav')
out = subprocess.call('ffmpeg -y -i %s -ac 1 -vn -acodec pcm_s16le -ar 16000 %s >/dev/null 2>/dev/null' %(fname,outfile), shell=True)
if out != 0:
raise ValueError('Conversion failed %s.'%fname)
## ========== ===========
## Split MUSAN for faster random access
## ========== ===========
def split_musan(args):
files = glob.glob('%s/musan/*/*/*.wav'%args.save_path)
audlen = 16000*5
audstr = 16000*3
for idx,file in enumerate(files):
fs,aud = wavfile.read(file)
writedir = os.path.splitext(file.replace('/musan/','/musan_split/'))[0]
os.makedirs(writedir)
for st in range(0,len(aud)-audlen,audstr):
wavfile.write(writedir+'/%05d.wav'%(st/fs),fs,aud[st:st+audlen])
print(idx,file)
## ========== ===========
## Main script
## ========== ===========
if __name__ == "__main__":
if not os.path.exists(args.save_path):
raise ValueError('Target directory does not exist.')
f = open('lists/fileparts.txt','r')
fileparts = f.readlines()
f.close()
f = open('lists/files.txt','r')
files = f.readlines()
f.close()
f = open('lists/augment.txt','r')
augfiles = f.readlines()
f.close()
if args.augment:
download(args,augfiles)
part_extract(args,os.path.join(args.save_path,'rirs_noises.zip'),['RIRS_NOISES/simulated_rirs/mediumroom','RIRS_NOISES/simulated_rirs/smallroom'])
full_extract(args,os.path.join(args.save_path,'musan.tar.gz'))
split_musan(args)
if args.download:
download(args,fileparts)
if args.extract:
concatenate(args, files)
for file in files:
full_extract(args,os.path.join(args.save_path,file.split()[1]))
out = subprocess.call('mv %s/dev/aac/* %s/aac/ && rm -r %s/dev' %(args.save_path,args.save_path,args.save_path), shell=True)
out = subprocess.call('mv %s/wav %s/voxceleb1' %(args.save_path,args.save_path), shell=True)
out = subprocess.call('mv %s/aac %s/voxceleb2' %(args.save_path,args.save_path), shell=True)
if args.convert:
convert(args)