244 lines
8.6 KiB
Python
244 lines
8.6 KiB
Python
# -*- Mode: Python -*-
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# vi:si:et:sw=4:sts=4:ts=4
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# Morituri - for those about to RIP
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# Copyright (C) 2009 Thomas Vander Stichele
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# This file is part of whipper.
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#
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# whipper is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# whipper is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with whipper. If not, see <http://www.gnu.org/licenses/>.
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import argparse
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import os
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import sys
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import tempfile
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import gobject
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gobject.threads_init()
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from whipper.command.basecommand import BaseCommand
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from whipper.common import accurip, common, config, drive, program
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from whipper.common import task as ctask
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from whipper.program import cdrdao, cdparanoia, utils
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from whipper.common import checksum
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from whipper.extern.task import task
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import logging
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logger = logging.getLogger(__name__)
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# see http://www.accuraterip.com/driveoffsets.htm
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# and misc/offsets.py
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OFFSETS = "+6, +48, +102, +667, +12, +30, +618, +594, +738, -472, " + \
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"+98, +116, +96, +733, +120, +691, +685, +97, +600, " + \
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"+690, +1292, +99, +676, +686, +1182, -24, +704, +572, " + \
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"+688, +91, +696, +103, -491, +689, +145, +708, +697, " + \
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"+564, +86, +679, +355, -496, -1164, +1160, +694, 0, " + \
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"-436, +79, +94, +684, +681, +106, +692, +943, +1194, " + \
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"+92, +117, +680, +682, +1268, +678, -582, +1473, +1279, " + \
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"-54, +1508, +740, +1272, +534, +976, +687, +675, +1303, " + \
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"+674, +1263, +108, +974, +122, +111, -489, +772, +732, " + \
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"-495, -494, +975, +935, +87, +668, +1776, +1364, +1336, " + \
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"+1127"
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class Find(BaseCommand):
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summary = "find drive read offset"
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description = """Find drive's read offset by ripping tracks from a
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CD in the AccurateRip database."""
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formatter_class = argparse.ArgumentDefaultsHelpFormatter
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device_option = True
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def add_arguments(self):
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self.parser.add_argument(
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'-o', '--offsets',
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action="store", dest="offsets", default=OFFSETS,
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help="list of offsets, comma-separated, colon-separated for ranges"
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)
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def handle_arguments(self):
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self._offsets = []
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blocks = self.options.offsets.split(',')
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for b in blocks:
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if ':' in b:
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a, b = b.split(':')
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self._offsets.extend(range(int(a), int(b) + 1))
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else:
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self._offsets.append(int(b))
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logger.debug('Trying with offsets %r', self._offsets)
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def do(self):
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runner = ctask.SyncRunner()
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device = self.options.device
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# if necessary, load and unmount
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sys.stdout.write('Checking device %s\n' % device)
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utils.load_device(device)
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utils.unmount_device(device)
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# first get the Table Of Contents of the CD
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t = cdrdao.ReadTOCTask(device)
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table = t.table
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logger.debug("CDDB disc id: %r", table.getCDDBDiscId())
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url = table.getAccurateRipURL()
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logger.debug("AccurateRip URL: %s", url)
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# FIXME: download url as a task too
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responses = []
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import urllib2
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try:
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handle = urllib2.urlopen(url)
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data = handle.read()
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responses = accurip.getAccurateRipResponses(data)
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except urllib2.HTTPError, e:
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if e.code == 404:
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sys.stdout.write(
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'Album not found in AccurateRip database.\n')
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return 1
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else:
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raise
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if responses:
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logger.debug('%d AccurateRip responses found.' % len(responses))
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if responses[0].cddbDiscId != table.getCDDBDiscId():
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logger.warning("AccurateRip response discid different: %s",
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responses[0].cddbDiscId)
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# now rip the first track at various offsets, calculating AccurateRip
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# CRC, and matching it against the retrieved ones
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def match(archecksum, track, responses):
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for i, r in enumerate(responses):
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if archecksum == r.checksums[track - 1]:
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return archecksum, i
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return None, None
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for offset in self._offsets:
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sys.stdout.write('Trying read offset %d ...\n' % offset)
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try:
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archecksum = self._arcs(runner, table, 1, offset)
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except task.TaskException, e:
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# let MissingDependency fall through
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if isinstance(e.exception,
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common.MissingDependencyException):
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raise e
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if isinstance(e.exception, cdparanoia.FileSizeError):
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sys.stdout.write(
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'WARNING: cannot rip with offset %d...\n' % offset)
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continue
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logger.warning("Unknown task exception for offset %d: %r" % (
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offset, e))
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sys.stdout.write(
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'WARNING: cannot rip with offset %d...\n' % offset)
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continue
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logger.debug('AR checksum calculated: %s' % archecksum)
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c, i = match(archecksum, 1, responses)
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if c:
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count = 1
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logger.debug('MATCHED against response %d' % i)
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sys.stdout.write(
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'Offset of device is likely %d, confirming ...\n' %
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offset)
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# now try and rip all other tracks as well, except for the
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# last one (to avoid readers that can't do overread
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for track in range(2, (len(table.tracks) + 1) - 1):
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try:
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archecksum = self._arcs(runner, table, track, offset)
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except task.TaskException, e:
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if isinstance(e.exception, cdparanoia.FileSizeError):
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sys.stdout.write(
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'WARNING: cannot rip with offset %d...\n' %
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offset)
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continue
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c, i = match(archecksum, track, responses)
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if c:
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logger.debug('MATCHED track %d against response %d' % (
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track, i))
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count += 1
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if count == len(table.tracks) - 1:
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self._foundOffset(device, offset)
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return 0
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else:
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sys.stdout.write(
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'Only %d of %d tracks matched, continuing ...\n' % (
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count, len(table.tracks)))
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sys.stdout.write('No matching offset found.\n')
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sys.stdout.write('Consider trying again with a different disc.\n')
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# TODO MW: Update this further for ARv2 code
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def _arcs(self, runner, table, track, offset):
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# rips the track with the given offset, return the arcs checksum
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logger.debug('Ripping track %r with offset %d ...', track, offset)
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fd, path = tempfile.mkstemp(
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suffix=u'.track%02d.offset%d.morituri.wav' % (
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track, offset))
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os.close(fd)
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t = cdparanoia.ReadTrackTask(path, table,
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table.getTrackStart(track), table.getTrackEnd(track),
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overread=False, offset=offset, device=self.options.device)
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t.description = 'Ripping track %d with read offset %d' % (
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track, offset)
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runner.run(t)
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# TODO MW: Update this to also use the v2 checksum(s)
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t = checksum.FastAccurateRipChecksumTask(path, trackNumber=track,
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trackCount=len(table.tracks), wave=True, v2=False)
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runner.run(t)
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os.unlink(path)
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return "%08x" % t.checksum
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def _foundOffset(self, device, offset):
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sys.stdout.write('\nRead offset of device is: %d.\n' %
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offset)
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info = drive.getDeviceInfo(device)
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if not info:
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sys.stdout.write('Offset not saved: could not get device info (requires pycdio).\n')
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return
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sys.stdout.write('Adding read offset to configuration file.\n')
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config.Config().setReadOffset(info[0], info[1], info[2],
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offset)
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class Offset(BaseCommand):
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summary = "handle drive offsets"
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description = """
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Drive offset detection utility.
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"""
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subcommands = {
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'find': Find,
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}
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