a5d70dd317
* morituri/image/table.py: * morituri/test/test_image_table.py: Fix up and deprecate stuff.
423 lines
12 KiB
Python
423 lines
12 KiB
Python
# -*- Mode: Python; test-case-name: morituri.test.test_image_table -*-
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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 morituri.
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#
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# morituri 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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# morituri 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 morituri. If not, see <http://www.gnu.org/licenses/>.
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"""
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Wrap Table of Contents.
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"""
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import os
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import struct
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import gst
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from morituri.common import task, checksum, common
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class DeleteMeTrack:
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"""
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I represent a track entry in a Table of Contents.
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@ivar number: track number (1-based)
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@type number: int
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@ivar start: start of track, in CD frames (0-based)
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@type start: int
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@ivar end: end of track, in CD frames (0-based)
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@type end: int
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@ivar audio: whether the track is audio
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@type audio: bool
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"""
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number = None
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start = None
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end = None
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audio = True
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def __repr__(self):
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return '<Track %02d>' % self.number
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def __init__(self, number, start, end, audio=True):
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self.number = number
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self.start = start
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self.end = end
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self.audio = audio
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class DeleteMeTable:
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"""
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I represent the Table of Contents of a CD.
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@ivar tracks: tracks on this CD
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@type tracks: list of L{Track}
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"""
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tracks = None # list of Track
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def __init__(self, tracks=None):
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if not tracks:
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tracks = []
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self.tracks = tracks
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def getTrackStart(self, number):
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"""
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@param number: the track number, 1-based
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@type number: int
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@returns: the start of the given track number, in CD frames
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@rtype: int
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"""
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return self.tracks[number - 1].start
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def getTrackEnd(self, number):
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"""
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@param number: the track number, 1-based
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@type number: int
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@returns: the end of the given track number, in CD frames
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@rtype: int
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"""
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return self.tracks[number - 1].end
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def getTrackLength(self, number):
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"""
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@param number: the track number, 1-based
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@type number: int
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@returns: the length of the given track number, in CD frames
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@rtype: int
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"""
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track = self.tracks[number - 1]
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return track.end - track.start + 1
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def getAudioTracks(self):
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"""
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@returns: the number of audio tracks on the CD
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@rtype: int
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"""
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return len([t for t in self.tracks if t.audio])
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def _cddbSum(self, i):
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ret = 0
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while i > 0:
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ret += (i % 10)
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i /= 10
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return ret
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def getCDDBDiscId(self):
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"""
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Calculate the CDDB disc ID.
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@rtype: str
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@returns: the 8-character hexadecimal disc ID
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"""
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# cddb disc id takes into account data tracks
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# last byte is the number of tracks on the CD
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n = 0
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for track in self.tracks:
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# CD's have a standard lead-in time of 2 seconds
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# which gets added for CDDB disc id's
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offset = self.getTrackStart(track.number) + \
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2 * checksum.FRAMES_PER_SECOND
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seconds = offset / checksum.FRAMES_PER_SECOND
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n += self._cddbSum(seconds)
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last = self.tracks[-1]
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leadout = self.getTrackEnd(last.number)
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frameLength = leadout - self.getTrackStart(1)
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t = frameLength / checksum.FRAMES_PER_SECOND
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value = (n % 0xff) << 24 | t << 8 | len(self.tracks)
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return "%08x" % value
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def getAccurateRipIds(self):
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"""
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Calculate the two AccurateRip ID's.
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@returns: the two 8-character hexadecimal disc ID's
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@rtype: tuple of (str, str)
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"""
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# AccurateRip does not take into account data tracks,
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# but does count the data track to determine the leadout offset
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discId1 = 0
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discId2 = 0
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for track in self.tracks:
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if not track.audio:
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continue
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offset = self.getTrackStart(track.number)
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discId1 += offset
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discId2 += (offset or 1) * track.number
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# also add end values, where leadout offset is one past the end
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# of the last track
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last = self.tracks[-1]
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offset = self.getTrackEnd(last.number) + 1
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discId1 += offset
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discId2 += offset * (self.getAudioTracks() + 1)
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discId1 &= 0xffffffff
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discId2 &= 0xffffffff
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return ("%08x" % discId1, "%08x" % discId2)
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def getAccurateRipURL(self):
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"""
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Return the full AccurateRip URL.
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@returns: the AccurateRip URL
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@rtype: str
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"""
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discId1, discId2 = self.getAccurateRipIds()
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return "http://www.accuraterip.com/accuraterip/" \
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"%s/%s/%s/dBAR-%.3d-%s-%s-%s.bin" % (
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discId1[-1], discId1[-2], discId1[-3],
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len(self.tracks), discId1, discId2, self.getCDDBDiscId())
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class ITTrack:
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"""
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I represent a track entry in an IndexTable.
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@ivar number: track number (1-based)
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@type number: int
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@ivar audio: whether the track is audio
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@type audio: bool
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@type indexes: dict of number -> L{Index}
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"""
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number = None
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audio = None
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indexes = None
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def __repr__(self):
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return '<Track %02d>' % self.number
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def __init__(self, number, audio=True):
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self.number = number
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self.audio = audio
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self.indexes = {}
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def index(self, number, absolute=None, path=None, relative=None, counter=None):
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i = Index(number, absolute, path, relative, counter)
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self.indexes[number] = i
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def getIndex(self, number):
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return self.indexes[number]
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def getFirstIndex(self):
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indexes = self.indexes.keys()
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indexes.sort()
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return self.indexes[indexes[0]]
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class Index:
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"""
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@ivar counter: counter for the index source; distinguishes between
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the matching FILE lines in .cue files for example
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"""
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number = None
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absolute = None
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path = None
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relative = None
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counter = None
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def __init__(self, number, absolute=None, path=None, relative=None, counter=None):
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self.number = number
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self.absolute = absolute
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self.path = path
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self.relative = relative
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self.counter = counter
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def __repr__(self):
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return '<Index %02d, absolute %r, path %r, relative %r>' % (
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self.number, self.absolute, self.path, self.relative)
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class IndexTable:
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"""
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I represent the Table of Contents of a CD.
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@ivar tracks: tracks on this CD
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@type tracks: list of L{ITTrack}
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"""
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tracks = None # list of ITTrack
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leadout = None # offset where the leadout starts
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def __init__(self, tracks=None):
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if not tracks:
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tracks = []
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self.tracks = tracks
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def getTrackStart(self, number):
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"""
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@param number: the track number, 1-based
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@type number: int
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@returns: the start of the given track number's index 1, in CD frames
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@rtype: int
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"""
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track = self.tracks[number - 1]
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return track.getIndex(1).absolute
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def getTrackEnd(self, number):
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"""
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@param number: the track number, 1-based
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@type number: int
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@returns: the end of the given track number (ie index 1 of next track)
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@rtype: int
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"""
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end = self.leadout - 1
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if number < len(self.tracks):
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end = self.tracks[number].getIndex(1).absolute - 1
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return end
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def getTrackLength(self, number):
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"""
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@param number: the track number, 1-based
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@type number: int
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@returns: the length of the given track number, in CD frames
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@rtype: int
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"""
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track = self.tracks[number - 1]
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return self.getTrackEnd(number) - self.getTrackStart(number) + 1
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def getAudioTracks(self):
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"""
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@returns: the number of audio tracks on the CD
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@rtype: int
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"""
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return len([t for t in self.tracks if t.audio])
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def _cddbSum(self, i):
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ret = 0
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while i > 0:
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ret += (i % 10)
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i /= 10
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return ret
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def getCDDBDiscId(self):
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"""
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Calculate the CDDB disc ID.
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@rtype: str
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@returns: the 8-character hexadecimal disc ID
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"""
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# cddb disc id takes into account data tracks
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# last byte is the number of tracks on the CD
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n = 0
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for track in self.tracks:
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# CD's have a standard lead-in time of 2 seconds
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# which gets added for CDDB disc id's
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offset = self.getTrackStart(track.number) + \
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2 * checksum.FRAMES_PER_SECOND
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seconds = offset / checksum.FRAMES_PER_SECOND
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n += self._cddbSum(seconds)
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last = self.tracks[-1]
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leadout = self.getTrackEnd(last.number)
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frameLength = leadout - self.getTrackStart(1)
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t = frameLength / checksum.FRAMES_PER_SECOND
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value = (n % 0xff) << 24 | t << 8 | len(self.tracks)
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return "%08x" % value
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def getAccurateRipIds(self):
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"""
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Calculate the two AccurateRip ID's.
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@returns: the two 8-character hexadecimal disc ID's
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@rtype: tuple of (str, str)
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"""
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# AccurateRip does not take into account data tracks,
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# but does count the data track to determine the leadout offset
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discId1 = 0
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discId2 = 0
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for track in self.tracks:
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if not track.audio:
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continue
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offset = self.getTrackStart(track.number)
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discId1 += offset
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discId2 += (offset or 1) * track.number
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# also add end values, where leadout offset is one past the end
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# of the last track
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last = self.tracks[-1]
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offset = self.getTrackEnd(last.number) + 1
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discId1 += offset
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discId2 += offset * (self.getAudioTracks() + 1)
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discId1 &= 0xffffffff
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discId2 &= 0xffffffff
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return ("%08x" % discId1, "%08x" % discId2)
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def getAccurateRipURL(self):
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"""
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Return the full AccurateRip URL.
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@returns: the AccurateRip URL
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@rtype: str
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"""
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discId1, discId2 = self.getAccurateRipIds()
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return "http://www.accuraterip.com/accuraterip/" \
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"%s/%s/%s/dBAR-%.3d-%s-%s-%s.bin" % (
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discId1[-1], discId1[-2], discId1[-3],
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len(self.tracks), discId1, discId2, self.getCDDBDiscId())
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def cue(self):
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"""
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Dump our internal representation to a .cue file content.
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"""
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lines = []
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# add the first FILE line
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path = self.tracks[0].getFirstIndex().path
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currentPath = path
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lines.append('FILE "%s" WAVE' % path)
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for i, track in enumerate(self.tracks):
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lines.append(" TRACK %02d %s" % (i + 1, 'AUDIO'))
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indexes = track.indexes.keys()
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indexes.sort()
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for number in indexes:
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index = track.indexes[number]
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if index.path != currentPath:
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lines.append('FILE "%s" WAVE' % index.path)
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lines.append(" INDEX %02d %s" % (number,
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common.framesToMSF(index.relative)))
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lines.append("")
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return "\n".join(lines)
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