Reads EAC log, generates musicbrainz disc TOC listing for use as discid. Opens browser with discid query on musicbrainz.org.

eac_log_to_musicbrainz_discid.py

#!/usr/bin/python
"""
Reads EAC log, generates musicbrainz disc TOC listing for use as discid.
Opens browser with discid query on musicbrainz.org.

Warning: may work wrong for discs having data tracks. May generate wrong results on other non-standard cases.

MIT License

Copyright (c) 2018 Konstantin Mochalov

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.
"""

import re
import sys
import webbrowser

class NotSupportedTOCError(Exception):
    pass

def filter_toc_entries(lines):
    """
    Take iterator of lines, return iterator of toc entries
    """
    while True:
        line = lines.next()
        # to allow internationalized EAC output where column headings
        # may differ
        if re.match(r""" \s* 
                   .+\s+ \| (?#track)
                \s+.+\s+ \| (?#start)
                \s+.+\s+ \| (?#length)
                \s+.+\s+ \| (?#start sec)
                \s+.+\s*$   (?#end sec)
                """, line, re.X):
            lines.next()
            break

    while True:
        line = lines.next()
        m = re.match(r"""
            ^\s*
            (?P<num>\d+)
            \s*\|\s*
            (?P<start_time>[0-9:.]+)
            \s*\|\s*
            (?P<length_time>[0-9:.]+)
            \s*\|\s*
            (?P<start_sector>\d+)
            \s*\|\s*
            (?P<end_sector>\d+)
            \s*$
            """, line, re.X)
        if not m:
            break
        yield m.groupdict()

def calculate_mb_toc_numbers(eac_entries):
    """
    Take iterator of toc entries, return list of numbers for musicbrainz disc id
    """
    eac = list(eac_entries)
    num_tracks = len(eac)
    
    tracknums = [int(e['num']) for e in eac]
    if range(1,num_tracks+1) != tracknums:
        raise NotSupportedTOCError("Non-standard track number sequence: %s", tracknums)
    
    leadout_offset = int(eac[-1]['end_sector']) + 150 + 1
    offsets = [(int(x['start_sector']) + 150) for x in eac]
    return [1, num_tracks, leadout_offset] + offsets
    
f = open(sys.argv[1])
#conv = (line.decode(sys.argv[2]) for line in f)
mb_toc_urlpart = "%20".join(str(x) for x in calculate_mb_toc_numbers(filter_toc_entries(f)))

webbrowser.open("http://musicbrainz.org/bare/cdlookup.html?toc=%s" % mb_toc_urlpart)