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211#!/usr/bin/env python3
from collections import deque
from pathlib import Path
import sys
import os
import argparse
import shlex
import datetime
import subprocess
import itertools
import math
# Remove line from top of lines and calculate indentation and return
def pop_line(lines):
line = lines.popleft()
c = line.lstrip()
indent = len(line) - len(c)
return (line, c, indent)
# Parse indentation tree
#
# input:
# FILE "x.wav" WAVE
# TRACK 01 AUDIO
# TRACK 02 AUDIO
# FILE "y.wav" WAVE
# TRACK 03 AUDIO
#
# output:
# {
# 'FILE': [
# { '': ['x.wav', 'WAVE'],
# 'TRACK': [
# { '': ['01', 'AUDIO'] },
# { '': ['02', 'AUDIO'] },
# ],
# },
# { '': ['y.wav', 'WAVE'],
# 'TRACK': [
# { '': ['03', 'AUDIO'] },
# ]
# },
# ]
# }
def simple_parse(lines, depth = 0):
out = {}
while len(lines) > 0:
(line, l, indent) = pop_line(lines)
(key, _, value) = l.partition(' ')
if not key in out:
out[key] = []
obj = { '': shlex.split(value) }
out[key].append(obj)
try:
(next_line, _, next_indent) = pop_line(lines)
except IndexError:
break
lines.appendleft(next_line)
if next_indent > indent:
obj.update(simple_parse(lines, depth + 1))
elif next_indent < indent:
break
return out
# Parse mm:ss:ff (ff are 75 fps frames)
def parse_time(time):
[minutes, seconds, frames] = map(int, time.split(':'))
return datetime.timedelta(
minutes=minutes,
seconds=seconds,
milliseconds=(frames / 75) * 1000
)
def main(argv=[]):
parser = argparse.ArgumentParser()
parser.add_argument('cue_file',
help='Path to cue file to split')
parser.add_argument('-E', '--cue-encoding', default='UTF8',
help='The text encoding of the CUE file')
parser.add_argument('-n', '--dry-run', action='store_true',
help='Print ffmpeg commands')
parser.add_argument('-o', '--output-path', type=Path, default='.',
help='Path to output to')
parser.add_argument('-e', '--output-encoding', default='flac',
help='Output file encoding')
args = parser.parse_args(argv)
cue_file = Path(args.cue_file).resolve()
cue_dir = cue_file.parent
cue_data = deque([l.rstrip() for l in open(cue_file, encoding=args.cue_encoding)])
cue = simple_parse(cue_data)
metadata = {}
tracks = []
file = { 'metadata': metadata, 'tracks': tracks }
# TODO: Handle multifile cues?
file['track_count'] = len(cue['FILE'][0]['TRACK'])
file['path'] = cue_dir / cue['FILE'][0][''][0]
metadata['album'] = cue['TITLE'][0][''][0]
if 'PERFORMER' in cue:
metadata['album_artist'] = cue['PERFORMER'][0][''][0]
if 'SONGWRITER' in cue:
metadata['composer'] = cue['SONGWRITER'][0][''][0]
if 'REM' in cue:
for r in cue['REM']:
[field, *rem_args] = r['']
if field == 'GENRE':
metadata['genre'] = rem_args[0]
elif field == 'DATE':
metadata['DATE'] = rem_args[0]
elif field == 'DISKID':
pass
elif field == 'COMMENT':
pass
elif field == 'REPLAYGAIN_ALBUM_GAIN':
metadata['replaygain_album_gain'] = ' '.join(rem_args)
elif field == 'REPLAYGAIN_ALBUM_PEAK':
metadata['replaygain_album_peak'] = ' '.join(rem_args)
for f in cue['FILE']:
for t in f['TRACK']:
metadata = {}
track = { 'metadata': metadata }
track['id'] = int(t[''][0])
metadata['track'] = f"{track['id']}/{file['track_count']}"
metadata['title'] = t['TITLE'][0][''][0]
if 'PERFORMER' in t:
metadata['artist'] = t['PERFORMER'][0][''][0]
if 'SONGWRITER' in t:
metadata['composer'] = t['SONGWRITER'][0][''][0]
if 'REPLAYGAIN_TRACK_GAIN' in t:
metadata['replaygain_track_gain'] = t['REPLAYGAIN_TRACK_GAIN'][0][''][0]
if 'REPLAYGAIN_TRACK_PEAK' in t:
metadata['replaygain_track_peak'] = t['REPLAYGAIN_TRACK_PEAK'][0][''][0]
if 'REM' in t:
for r in t['REM']:
[field, *rem_args] = r['']
if field == 'REPLAYGAIN_TRACK_GAIN':
metadata['replaygain_track_gain'] = ' '.join(rem_args)
elif field == 'REPLAYGAIN_TRACK_PEAK':
metadata['replaygain_track_peak'] = ' '.join(rem_args)
for index in t['INDEX']:
if int(index[''][0]) == int('01'):
track['start_time'] = parse_time(index[''][1])
elif int(index[''][0]) == int('00'):
track['pregap_time'] = parse_time(index[''][1])
tracks.append(track)
# Order by start time
time_ordered_tracks = deque(reversed(sorted(tracks,
key = lambda t: t['start_time'])))
# Calculate track end times by previous track pregap time
end_time = None
for track in time_ordered_tracks:
start_time = track.get('start_time')
pregap_time = track.get('pregap_time', start_time)
track['end_time'] = end_time
if end_time is not None and start_time is not None:
track['duration'] = end_time - start_time
end_time = pregap_time
ffmpeg = ['ffmpeg']
file_meta_args = [f'{k.upper()}={v}' for (k, v) in file['metadata'].items()]
track_padding = math.ceil(math.log10(len(file['tracks'])))
args.output_path.resolve().mkdir(exist_ok=True)
for track in file['tracks']:
track_meta_args = [f'{k.upper()}={v}' for (k, v) in track['metadata'].items()]
meta_args = list(itertools.chain.from_iterable([['-metadata', v] for v in file_meta_args + track_meta_args]))
try:
file_author = track['metadata']['author']
except KeyError:
file_author = file['metadata']['album_artist']
track_title = track['metadata']['title']
encoding = args.output_encoding
out_filename = f"{track['id']:0{track_padding}d} - {file_author} - {track['metadata']['title']}.{encoding}"
out_filename = out_filename.replace(os.sep, '')
command = (ffmpeg
+ [
'-ss', str(track['start_time']),
'-i', str(file['path']),
# TODO: argparse codec default='flac'
#'-c:a', encoding,
'-vn', # ffmpeg interprets album art as video
]
+ (['-t', str(track['duration'])] if 'duration' in track else [])
+ meta_args
+ [ str(args.output_path.resolve() /
out_filename) ])
print(' '.join(command))
if not args.dry_run:
subprocess.run(command)
if __name__ == '__main__':
main(sys.argv[1:])