229 lines
8.3 KiB
Python
229 lines
8.3 KiB
Python
# -*- Mode: Python -*-
|
|
# vi:si:et:sw=4:sts=4:ts=4
|
|
|
|
# Copyright (C) 2009 Thomas Vander Stichele
|
|
|
|
# This file is part of whipper.
|
|
#
|
|
# whipper is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# whipper is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with whipper. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
import argparse
|
|
import os
|
|
import sys
|
|
import tempfile
|
|
import logging
|
|
import gobject
|
|
from whipper.command.basecommand import BaseCommand
|
|
from whipper.common import accurip, common, config, drive
|
|
from whipper.common import task as ctask
|
|
from whipper.program import arc, cdrdao, cdparanoia, utils
|
|
from whipper.extern.task import task
|
|
|
|
gobject.threads_init()
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
# see http://www.accuraterip.com/driveoffsets.htm
|
|
# and misc/offsets.py
|
|
OFFSETS = "+6, +48, +102, +667, +12, +30, +618, +594, +738, -472, " + \
|
|
"+98, +116, +96, +733, +120, +691, +685, +97, +600, " + \
|
|
"+690, +1292, +99, +676, +686, +1182, -24, +704, +572, " + \
|
|
"+688, +91, +696, +103, -491, +689, +145, +708, +697, " + \
|
|
"+564, +86, +679, +355, -496, -1164, +1160, +694, 0, " + \
|
|
"-436, +79, +94, +684, +681, +106, +692, +943, +1194, " + \
|
|
"+92, +117, +680, +682, +1268, +678, -582, +1473, +1279, " + \
|
|
"-54, +1508, +740, +1272, +534, +976, +687, +675, +1303, " + \
|
|
"+674, +1263, +108, +974, +122, +111, -489, +772, +732, " + \
|
|
"-495, -494, +975, +935, +87, +668, +1776, +1364, +1336, " + \
|
|
"+1127"
|
|
|
|
|
|
class Find(BaseCommand):
|
|
summary = "find drive read offset"
|
|
description = """Find drive's read offset by ripping tracks from a
|
|
CD in the AccurateRip database."""
|
|
formatter_class = argparse.ArgumentDefaultsHelpFormatter
|
|
device_option = True
|
|
|
|
def add_arguments(self):
|
|
self.parser.add_argument(
|
|
'-o', '--offsets',
|
|
action="store", dest="offsets", default=OFFSETS,
|
|
help="list of offsets, comma-separated, colon-separated for ranges"
|
|
)
|
|
|
|
def handle_arguments(self):
|
|
self._offsets = []
|
|
blocks = self.options.offsets.split(',')
|
|
for b in blocks:
|
|
if ':' in b:
|
|
a, b = b.split(':')
|
|
self._offsets.extend(range(int(a), int(b) + 1))
|
|
else:
|
|
self._offsets.append(int(b))
|
|
|
|
logger.debug('Trying with offsets %r', self._offsets)
|
|
|
|
def do(self):
|
|
runner = ctask.SyncRunner()
|
|
|
|
device = self.options.device
|
|
|
|
# if necessary, load and unmount
|
|
sys.stdout.write('Checking device %s\n' % device)
|
|
|
|
utils.load_device(device)
|
|
utils.unmount_device(device)
|
|
|
|
# first get the Table Of Contents of the CD
|
|
t = cdrdao.ReadTOCTask(device)
|
|
table = t.table
|
|
|
|
logger.debug("CDDB disc id: %r", table.getCDDBDiscId())
|
|
responses = accurip.get_db_entry(table.accuraterip_path())
|
|
|
|
if responses:
|
|
logger.debug('%d AccurateRip responses found.' % len(responses))
|
|
|
|
if responses[0].cddbDiscId != table.getCDDBDiscId():
|
|
logger.warning("AccurateRip response discid different: %s",
|
|
responses[0].cddbDiscId)
|
|
|
|
# now rip the first track at various offsets, calculating AccurateRip
|
|
# CRC, and matching it against the retrieved ones
|
|
|
|
# archecksums is a tuple of accuraterip checksums: (v1, v2)
|
|
def match(archecksums, track, responses):
|
|
for i, r in enumerate(responses):
|
|
for checksum in archecksums:
|
|
if checksum == r.checksums[track - 1]:
|
|
return checksum, i
|
|
|
|
return None, None
|
|
|
|
for offset in self._offsets:
|
|
sys.stdout.write('Trying read offset %d ...\n' % offset)
|
|
try:
|
|
archecksums = self._arcs(runner, table, 1, offset)
|
|
except task.TaskException, e:
|
|
|
|
# let MissingDependency fall through
|
|
if isinstance(e.exception,
|
|
common.MissingDependencyException):
|
|
raise e
|
|
|
|
if isinstance(e.exception, cdparanoia.FileSizeError):
|
|
sys.stdout.write(
|
|
'WARNING: cannot rip with offset %d...\n' % offset)
|
|
continue
|
|
|
|
logger.warning("Unknown task exception for offset %d: %r" % (
|
|
offset, e))
|
|
sys.stdout.write(
|
|
'WARNING: cannot rip with offset %d...\n' % offset)
|
|
continue
|
|
|
|
logger.debug('AR checksums calculated: %s %s' % archecksums)
|
|
|
|
c, i = match(archecksums, 1, responses)
|
|
if c:
|
|
count = 1
|
|
logger.debug('MATCHED against response %d' % i)
|
|
sys.stdout.write(
|
|
'Offset of device is likely %d, confirming ...\n' %
|
|
offset)
|
|
|
|
# now try and rip all other tracks as well, except for the
|
|
# last one (to avoid readers that can't do overread
|
|
for track in range(2, (len(table.tracks) + 1) - 1):
|
|
try:
|
|
archecksums = self._arcs(runner, table, track, offset)
|
|
except task.TaskException, e:
|
|
if isinstance(e.exception, cdparanoia.FileSizeError):
|
|
sys.stdout.write(
|
|
'WARNING: cannot rip with offset %d...\n' %
|
|
offset)
|
|
continue
|
|
|
|
c, i = match(archecksums, track, responses)
|
|
if c:
|
|
logger.debug('MATCHED track %d against response %d' % (
|
|
track, i))
|
|
count += 1
|
|
|
|
if count == len(table.tracks) - 1:
|
|
self._foundOffset(device, offset)
|
|
return 0
|
|
else:
|
|
sys.stdout.write(
|
|
'Only %d of %d tracks matched, continuing ...\n' % (
|
|
count, len(table.tracks)))
|
|
|
|
sys.stdout.write('No matching offset found.\n')
|
|
sys.stdout.write('Consider trying again with a different disc.\n')
|
|
|
|
def _arcs(self, runner, table, track, offset):
|
|
# rips the track with the given offset, return the arcs checksums
|
|
logger.debug('Ripping track %r with offset %d ...', track, offset)
|
|
|
|
fd, path = tempfile.mkstemp(
|
|
suffix=u'.track%02d.offset%d.whipper.wav' % (
|
|
track, offset))
|
|
os.close(fd)
|
|
|
|
t = cdparanoia.ReadTrackTask(path, table,
|
|
table.getTrackStart(
|
|
track), table.getTrackEnd(track),
|
|
overread=False, offset=offset,
|
|
device=self.options.device)
|
|
t.description = 'Ripping track %d with read offset %d' % (
|
|
track, offset)
|
|
runner.run(t)
|
|
|
|
v1 = arc.accuraterip_checksum(
|
|
path, track, len(table.tracks), wave=True, v2=False
|
|
)
|
|
v2 = arc.accuraterip_checksum(
|
|
path, track, len(table.tracks), wave=True, v2=True
|
|
)
|
|
|
|
os.unlink(path)
|
|
return ("%08x" % v1, "%08x" % v2)
|
|
|
|
def _foundOffset(self, device, offset):
|
|
sys.stdout.write('\nRead offset of device is: %d.\n' %
|
|
offset)
|
|
|
|
info = drive.getDeviceInfo(device)
|
|
if not info:
|
|
sys.stdout.write(
|
|
'Offset not saved: could not get '
|
|
'device info (requires pycdio).\n')
|
|
return
|
|
|
|
sys.stdout.write('Adding read offset to configuration file.\n')
|
|
|
|
config.Config().setReadOffset(info[0], info[1], info[2],
|
|
offset)
|
|
|
|
|
|
class Offset(BaseCommand):
|
|
summary = "handle drive offsets"
|
|
description = """
|
|
Drive offset detection utility.
|
|
"""
|
|
subcommands = {
|
|
'find': Find,
|
|
}
|