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runner.py
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runner.py
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#!/usr/bin/python
# -*- coding: utf-8 -*-
# Author: Amelia Ikeda <amelia@dorks.io>
#
# Copyright (c) 2015 R/a/dio
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
# DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
# OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
# THE USE OR OTHER DEALINGS IN THE SOFTWARE.
"""Verification tool to ensure that songs can be played by R/a/dio's
streaming irc bot (radio.streamer, hanyuu), re-encoding them using
lame or flac as needed."""
import subprocess
import os
import os.path
import shutil
import json
import audiotools
import argparse
import uuid
import sys
CHOICES = ['mp3', 'flac']
ENCODERS = {
"mp3": "lame --noreplaygain --silent --resample 44.1 -m j --preset cbr 192 -q 0 {filein} {fileout}",
"flac": "flac -o {fileout} {filein}"
}
class Verifier(object):
def __init__(self, node, formats, encoders, args):
self.node = node
self.formats = formats
self.filename = self.get_path(args.filename)
self.format = self.get_format(args)
self.command = encoders[self.format]
def get_path(self, filename):
filename = os.path.abspath(filename)
if not os.path.exists(filename):
self.error("file doesn't exist")
return filename
def get_format(self, args):
if args.format is None:
_, fmt = os.path.splitext(args.filename)
fmt = fmt.replace('.', '')
if not fmt in self.formats:
self.error("{0} is an unsupported file format".format(fmt))
else:
fmt = args.format
return fmt
def rename(self, src, dst):
try:
shutil.move(src, dst)
except (IOError, shutil.Error) as err:
self.error("failed to rename {0} to {1}".format(src, dst))
def run_encode(self, filein, fileout):
command = self.command.format(filein=filein, fileout=fileout).split(" ")
subprocess.call(command)
def encode(self):
file_id = self.uuid()
filename = "/tmp/{id}.{ext}".format(ext=self.format, id=self.uuid())
# let's encode it
try:
self.run_encode(self.filename, filename)
except:
self.error("failed to encode")
# now we have a file, let's verify that one
try:
self.verify(temp_file)
except:
os.remove(temp_file)
error("re-encoding the file failed")
# and rename it and we're good
new = self.new_path(file_id)
self.rename(filename, new)
return new
def uuid(self):
return str(uuid.uuid1(self.node))
def new_path(self, filename):
return os.path.join(os.path.dirname(self.filename),
'{0}.{1}'.format(filename, self.format))
def verify(self, filename=None):
if not filename:
filename = self.filename
audio = audiotools.open(filename)
# Do verification with audiotools; this might be too strict
audio.verify()
def error(self, message, status="fail"):
print json.dumps({"error": message, "status": status})
sys.exit(1)
def check_file(self):
try:
self.verify()
except (audiotools.InvalidFile, audiotools.UnsupportedFile, ValueError):
# We failed to open it in audiotools, so the streamer
# won't be able to play it; try re-encoding for good measure.
try:
filename = self.encode()
except VerifyError:
error("failed to encode the song")
except:
error("unknown error on {0}".format(self.filename))
fileobj = audiotools.open(filename)
length = long(fileobj.seconds_length())
# If there was no error we now have two files, delete the old one
os.remove(args.file)
else:
filename = self.new_path(self.uuid())
self.rename(self.filename, filename)
fileobj = audiotools.open(filename)
length = long(fileobj.seconds_length())
print json.dumps({"length": length, "success": True, "filename": filename})
sys.exit(0)
def main():
parser = argparse.ArgumentParser(description='Verify songs can be played by the streamer')
parser.add_argument('filename', help='the filename of the input')
parser.add_argument('--format', choices=CHOICES, help='the format of the file (default: guess)')
args = parser.parse_args()
verifier = Verifier(20491574538233, CHOICES, ENCODERS, args)
verifier.check_file()
if __name__ == "__main__":
main()