215 lines
6.9 KiB
Python
215 lines
6.9 KiB
Python
# -*- Mode: Python; test-case-name: whipper.test.test_image_image -*-
|
|
# 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/>.
|
|
|
|
"""
|
|
Wrap on-disk CD images based on the .cue file.
|
|
"""
|
|
|
|
import os
|
|
|
|
from whipper.common import encode
|
|
from whipper.common import common
|
|
from whipper.image import cue, table
|
|
from whipper.extern.task import task
|
|
from whipper.program.soxi import AudioLengthTask
|
|
|
|
import logging
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class Image:
|
|
"""
|
|
:ivar table: The Table of Contents for this image.
|
|
:vartype table: table.Table
|
|
"""
|
|
logCategory = 'Image'
|
|
|
|
def __init__(self, path):
|
|
"""
|
|
:type path: str
|
|
:param path: .cue path
|
|
"""
|
|
assert isinstance(path, str), "%r is not str" % path
|
|
|
|
self._path = path
|
|
self.cue = cue.CueFile(path)
|
|
self.cue.parse()
|
|
self._offsets = [] # 0 .. trackCount - 1
|
|
self._lengths = [] # 0 .. trackCount - 1
|
|
|
|
self.table = None
|
|
|
|
def getRealPath(self, path):
|
|
"""
|
|
Translate the .cue's FILE to an existing path.
|
|
|
|
:param path: .cue path
|
|
"""
|
|
assert isinstance(path, str), "%r is not str" % path
|
|
|
|
return self.cue.getRealPath(path)
|
|
|
|
def setup(self, runner):
|
|
"""
|
|
Do initial setup, like figuring out track lengths, and
|
|
constructing the Table of Contents.
|
|
"""
|
|
logger.debug('setup image start')
|
|
verify = ImageVerifyTask(self)
|
|
logger.debug('verifying image')
|
|
runner.run(verify)
|
|
logger.debug('verified image')
|
|
|
|
# calculate offset and length for each track
|
|
|
|
# CD's have a standard lead-in time of 2 seconds;
|
|
# checksums that use it should add it there
|
|
if 0 in verify.lengths:
|
|
offset = verify.lengths[0]
|
|
else:
|
|
offset = self.cue.table.tracks[0].getIndex(1).relative
|
|
|
|
tracks = []
|
|
|
|
for i in range(len(self.cue.table.tracks)):
|
|
length = self.cue.getTrackLength(self.cue.table.tracks[i])
|
|
if length == -1:
|
|
length = verify.lengths[i + 1]
|
|
t = table.Track(i + 1, audio=True)
|
|
tracks.append(t)
|
|
# FIXME: this probably only works for non-compliant .CUE files
|
|
# where pregap is put at end of previous file
|
|
t.index(1, absolute=offset,
|
|
path=self.cue.table.tracks[i].getIndex(1).path,
|
|
relative=0)
|
|
|
|
offset += length
|
|
|
|
self.table = table.Table(tracks)
|
|
self.table.leadout = offset
|
|
logger.debug('setup image done')
|
|
|
|
|
|
class ImageVerifyTask(task.MultiSeparateTask):
|
|
"""
|
|
I verify a disk image and get the necessary track lengths.
|
|
"""
|
|
|
|
logCategory = 'ImageVerifyTask'
|
|
|
|
description = "Checking tracks"
|
|
lengths = None
|
|
|
|
def __init__(self, image):
|
|
task.MultiSeparateTask.__init__(self)
|
|
|
|
self._image = image
|
|
# XXX: Pylint, redefining name 'cue' from outer scope (import)
|
|
cue = image.cue
|
|
self._tasks = []
|
|
self.lengths = {}
|
|
|
|
try:
|
|
htoa = cue.table.tracks[0].indexes[0]
|
|
track = cue.table.tracks[0]
|
|
path = image.getRealPath(htoa.path)
|
|
assert isinstance(path, str), "%r is not str" % path
|
|
logger.debug('schedule scan of audio length of %r', path)
|
|
taskk = AudioLengthTask(path)
|
|
self.addTask(taskk)
|
|
self._tasks.append((0, track, taskk))
|
|
except (KeyError, IndexError):
|
|
logger.debug('no HTOA track')
|
|
|
|
for trackIndex, track in enumerate(cue.table.tracks):
|
|
logger.debug('verifying track %d', trackIndex + 1)
|
|
index = track.indexes[1]
|
|
length = cue.getTrackLength(track)
|
|
|
|
if length == -1:
|
|
path = image.getRealPath(index.path)
|
|
assert isinstance(path, str), "%r is not str" % path
|
|
logger.debug('schedule scan of audio length of %r', path)
|
|
taskk = AudioLengthTask(path)
|
|
self.addTask(taskk)
|
|
self._tasks.append((trackIndex + 1, track, taskk))
|
|
else:
|
|
logger.debug('track %d has length %d', trackIndex + 1, length)
|
|
|
|
def stop(self):
|
|
for trackIndex, track, taskk in self._tasks:
|
|
if taskk.exception:
|
|
logger.debug('subtask %r had exception %r, shutting down',
|
|
taskk, taskk.exception)
|
|
self.setException(taskk.exception)
|
|
break
|
|
|
|
if taskk.length is None:
|
|
raise ValueError("Track length was not found; "
|
|
"look for earlier errors "
|
|
"in debug log (set RIP_DEBUG=4)")
|
|
index = track.indexes[1]
|
|
assert taskk.length % common.SAMPLES_PER_FRAME == 0
|
|
end = taskk.length // common.SAMPLES_PER_FRAME
|
|
self.lengths[trackIndex] = end - index.relative
|
|
|
|
task.MultiSeparateTask.stop(self)
|
|
|
|
|
|
class ImageEncodeTask(task.MultiSeparateTask):
|
|
"""
|
|
I encode a disk image to a different format.
|
|
"""
|
|
|
|
description = "Encoding tracks"
|
|
|
|
def __init__(self, image, outdir):
|
|
task.MultiSeparateTask.__init__(self)
|
|
|
|
self._image = image
|
|
# XXX: Pylint, redefining name 'cue' from outer scope (import)
|
|
cue = image.cue
|
|
self._tasks = []
|
|
self.lengths = {}
|
|
|
|
def add(index):
|
|
|
|
path = image.getRealPath(index.path)
|
|
assert isinstance(path, str), "%r is not str" % path
|
|
logger.debug('schedule encode of %r', path)
|
|
root, _ = os.path.splitext(os.path.basename(path))
|
|
outpath = os.path.join(outdir, root + '.' + 'flac')
|
|
logger.debug('schedule encode to %r', outpath)
|
|
taskk = encode.FlacEncodeTask(
|
|
path, os.path.join(outdir, root + '.' + 'flac'))
|
|
self.addTask(taskk)
|
|
|
|
try:
|
|
htoa = cue.table.tracks[0].indexes[0]
|
|
logger.debug('encoding HTOA track')
|
|
add(htoa)
|
|
except (KeyError, IndexError):
|
|
logger.debug('no HTOA track')
|
|
|
|
for trackIndex, track in enumerate(cue.table.tracks):
|
|
logger.debug('encoding track %d', trackIndex + 1)
|
|
index = track.indexes[1]
|
|
add(index)
|