def parse(self):
currentFile = None
currentTrack = None
state = 'HEADER'
# counts sources for audio data; SILENCE/ZERO/FILE
counter = 0
trackNumber = 0
indexNumber = 0
# running absolute offset: where each track starts
absoluteOffset = 0
# running relative offset, relative to counter src
relativeOffset = 0
# currentLength is accrued during TRACK record parsing length
# of current track as parsed so far reset on each TRACK statement
currentLength = 0
# accrued during TRACK record parsing, total disc
totalLength = 0
# length of the pre-gap, current track in for loop
pregapLength = 0
# the first track's INDEX 1 can only be gotten from the .toc
# file once the first pregap is calculated; so we add INDEX 1
# at the end of each parsed TRACK record
handle = codecs.open(self._path, "r", "utf-8")
for number, line in enumerate(handle.readlines()):
line = line.rstrip()
# look for CDTEXT stuff in either header or tracks
m = _CDTEXT_CANDIDATE_RE.search(line)
if m:
key = m.group('key')
value = m.group('value')
# usually, value is encoded with octal escapes and in latin-1
# FIXME: other encodings are possible, does cdrdao handle
# them ?
value = value.decode('string-escape').decode('latin-1')
if key in table.CDTEXT_FIELDS:
# FIXME: consider ISRC separate for now, but this
# is a limitation of our parser approach
if state == 'HEADER':
self.table.cdtext[key] = value
logger.debug('found disc CD-Text %s: %r', key, value)
elif state == 'TRACK':
if key != 'ISRC' or not currentTrack \
or currentTrack.isrc is not None:
logger.debug('found track CD-Text %s: %r', key,
value)
currentTrack.cdtext[key] = value
# look for header elements
m = _CATALOG_RE.search(line)
if m:
self.table.catalog = m.group('catalog')
logger.debug("found catalog number %s", self.table.catalog)
# look for TRACK lines
m = _TRACK_RE.search(line)
if m:
state = 'TRACK'
# set index 1 of previous track if there was one, using
# pregapLength if applicable
if currentTrack:
self._index(currentTrack, 1, absoluteOffset, pregapLength)
# create a new track to be filled by later lines
trackNumber += 1
trackMode = m.group('mode')
audio = trackMode == 'AUDIO'
currentTrack = table.Track(trackNumber, audio=audio)
self.table.tracks.append(currentTrack)
# update running totals
absoluteOffset += currentLength
relativeOffset += currentLength
totalLength += currentLength
# FIXME: track mode
logger.debug('found track %d, mode %s, at absoluteOffset %d',
trackNumber, trackMode, absoluteOffset)
# reset counters relative to a track
currentLength = 0
indexNumber = 1
pregapLength = 0
continue
# look for PRE_EMPHASIS lines
m = _PRE_EMPHASIS_RE.search(line)
if m:
currentTrack.pre_emphasis = True
logger.debug('track has PRE_EMPHASIS')
# look for ISRC lines
m = _ISRC_RE.search(line)
if m:
isrc = m.group('isrc')
currentTrack.isrc = isrc
logger.debug('found ISRC code %s', isrc)
# look for SILENCE lines
m = _SILENCE_RE.search(line)
if m:
length = m.group('length')
logger.debug('silence of %r', length)
self._sources.append(counter, absoluteOffset, None)
if currentFile is not None:
logger.debug('silence after file, increasing counter')
counter += 1
relativeOffset = 0
currentFile = None
currentLength += common.msfToFrames(length)
# look for ZERO lines
m = _ZERO_RE.search(line)
if m:
if currentFile is not None:
logger.debug('zero after file, increasing counter')
counter += 1
relativeOffset = 0
currentFile = None
length = m.group('length')
currentLength += common.msfToFrames(length)
# look for FILE lines
m = _FILE_RE.search(line)
if m:
filePath = m.group('name')
start = m.group('start')
length = m.group('length')
logger.debug('file %s, start %r, length %r', filePath,
common.msfToFrames(start),
common.msfToFrames(length))
if not currentFile or filePath != currentFile.path:
counter += 1
relativeOffset = 0
logger.debug(
'track %d, switched to new file, '
'increased counter to %d', trackNumber, counter)
currentFile = File(filePath, common.msfToFrames(start),
common.msfToFrames(length))
self._sources.append(counter, absoluteOffset + currentLength,
currentFile)
currentLength += common.msfToFrames(length)
# look for DATAFILE lines
m = _DATAFILE_RE.search(line)
if m:
filePath = m.group('name')
length = m.group('length')
logger.debug('file %s, length %r', filePath,
common.msfToFrames(length))
if not currentFile or filePath != currentFile.path:
counter += 1
relativeOffset = 0
logger.debug(
'track %d, switched to new file, '
'increased counter to %d', trackNumber, counter)
# FIXME: assume that a MODE2_FORM_MIX track always starts at 0
currentFile = File(filePath, 0, common.msfToFrames(length))
self._sources.append(counter, absoluteOffset + currentLength,
currentFile)
currentLength += common.msfToFrames(length)
# look for START lines
m = _START_RE.search(line)
if m:
if not currentTrack:
self.message(number, 'START without preceding TRACK')
print('ouch')
continue
length = common.msfToFrames(m.group('length'))
c, o, s = self._sources.get(absoluteOffset)
logger.debug('at abs offset %d, we are in source %r',
absoluteOffset, s)
counterStart = self._sources.getCounterStart(c)
relativeOffset = absoluteOffset - counterStart
currentTrack.index(0,
path=s and s.path or None,
absolute=absoluteOffset,
relative=relativeOffset,
counter=c)
logger.debug('[track %02d index 00] added %r',
currentTrack.number, currentTrack.getIndex(0))
# store the pregapLength to add it when we index 1 for this
# track on the next iteration
pregapLength = length
# look for INDEX lines
m = _INDEX_RE.search(line)
if m:
if not currentTrack:
self.message(number, 'INDEX without preceding TRACK')
print('ouch')
continue
indexNumber += 1
offset = common.msfToFrames(m.group('offset'))
self._index(currentTrack, indexNumber, absoluteOffset, offset)
# handle index 1 of final track, if any
if currentTrack:
self._index(currentTrack, 1, absoluteOffset, pregapLength)
# totalLength was added up to the penultimate track
self.table.leadout = totalLength + currentLength
logger.debug('parse: leadout: %r', self.table.leadout)
def parse(self):
currentFile = None
currentTrack = None
state = 'HEADER'
# counts sources for audio data; SILENCE/ZERO/FILE
counter = 0
trackNumber = 0
indexNumber = 0
# running absolute offset: where each track starts
absoluteOffset = 0
# running relative offset, relative to counter src
relativeOffset = 0
# currentLength is accrued during TRACK record parsing length
# of current track as parsed so far reset on each TRACK statement
currentLength = 0
# accrued during TRACK record parsing, total disc
totalLength = 0
# length of the pre-gap, current track in for loop
pregapLength = 0
# the first track's INDEX 1 can only be gotten from the .toc
# file once the first pregap is calculated; so we add INDEX 1
# at the end of each parsed TRACK record
handle = codecs.open(self._path, "r", "utf-8")
for number, line in enumerate(handle.readlines()):
line = line.rstrip()
# look for CDTEXT stuff in either header or tracks
m = _CDTEXT_CANDIDATE_RE.search(line)
if m:
key = m.group('key')
value = m.group('value')
# usually, value is encoded with octal escapes and in latin-1
# FIXME: other encodings are possible, does cdrdao handle
# them ?
value = value.decode('string-escape').decode('latin-1')
if key in table.CDTEXT_FIELDS:
# FIXME: consider ISRC separate for now, but this
# is a limitation of our parser approach
if state == 'HEADER':
self.table.cdtext[key] = value
logger.debug('found disc CD-Text %s: %r', key, value)
elif state == 'TRACK':
if key != 'ISRC' or not currentTrack \
or currentTrack.isrc is not None:
logger.debug('found track CD-Text %s: %r',
key, value)
currentTrack.cdtext[key] = value
# look for header elements
m = _CATALOG_RE.search(line)
if m:
self.table.catalog = m.group('catalog')
logger.debug("found catalog number %s", self.table.catalog)
# look for TRACK lines
m = _TRACK_RE.search(line)
if m:
state = 'TRACK'
# set index 1 of previous track if there was one, using
# pregapLength if applicable
if currentTrack:
self._index(currentTrack, 1, absoluteOffset, pregapLength)
# create a new track to be filled by later lines
trackNumber += 1
trackMode = m.group('mode')
audio = trackMode == 'AUDIO'
currentTrack = table.Track(trackNumber, audio=audio)
self.table.tracks.append(currentTrack)
# update running totals
absoluteOffset += currentLength
relativeOffset += currentLength
totalLength += currentLength
# FIXME: track mode
logger.debug('found track %d, mode %s, at absoluteOffset %d',
trackNumber, trackMode, absoluteOffset)
# reset counters relative to a track
currentLength = 0
indexNumber = 1
pregapLength = 0
continue
# look for PRE_EMPHASIS lines
m = _PRE_EMPHASIS_RE.search(line)
if m:
currentTrack.pre_emphasis = True
logger.debug('track has PRE_EMPHASIS')
# look for ISRC lines
m = _ISRC_RE.search(line)
if m:
isrc = m.group('isrc')
currentTrack.isrc = isrc
logger.debug('found ISRC code %s', isrc)
# look for SILENCE lines
m = _SILENCE_RE.search(line)
if m:
length = m.group('length')
logger.debug('silence of %r', length)
self._sources.append(counter, absoluteOffset, None)
if currentFile is not None:
logger.debug('silence after file, increasing counter')
counter += 1
relativeOffset = 0
currentFile = None
currentLength += common.msfToFrames(length)
# look for ZERO lines
m = _ZERO_RE.search(line)
if m:
if currentFile is not None:
logger.debug('zero after file, increasing counter')
counter += 1
relativeOffset = 0
currentFile = None
length = m.group('length')
currentLength += common.msfToFrames(length)
# look for FILE lines
m = _FILE_RE.search(line)
if m:
filePath = m.group('name')
start = m.group('start')
length = m.group('length')
logger.debug('file %s, start %r, length %r',
filePath, common.msfToFrames(start),
common.msfToFrames(length))
if not currentFile or filePath != currentFile.path:
counter += 1
relativeOffset = 0
logger.debug('track %d, switched to new file, '
'increased counter to %d',
trackNumber, counter)
currentFile = File(filePath, common.msfToFrames(start),
common.msfToFrames(length))
self._sources.append(counter, absoluteOffset + currentLength,
currentFile)
currentLength += common.msfToFrames(length)
# look for DATAFILE lines
m = _DATAFILE_RE.search(line)
if m:
filePath = m.group('name')
length = m.group('length')
logger.debug('file %s, length %r',
filePath, common.msfToFrames(length))
if not currentFile or filePath != currentFile.path:
counter += 1
relativeOffset = 0
logger.debug('track %d, switched to new file, '
'increased counter to %d',
trackNumber, counter)
# FIXME: assume that a MODE2_FORM_MIX track always starts at 0
currentFile = File(filePath, 0, common.msfToFrames(length))
self._sources.append(counter, absoluteOffset + currentLength,
currentFile)
currentLength += common.msfToFrames(length)
# look for START lines
m = _START_RE.search(line)
if m:
if not currentTrack:
self.message(number, 'START without preceding TRACK')
print('ouch')
continue
length = common.msfToFrames(m.group('length'))
c, o, s = self._sources.get(absoluteOffset)
logger.debug('at abs offset %d, we are in source %r',
absoluteOffset, s)
counterStart = self._sources.getCounterStart(c)
relativeOffset = absoluteOffset - counterStart
currentTrack.index(0, path=s and s.path or None,
absolute=absoluteOffset,
relative=relativeOffset, counter=c)
logger.debug('[track %02d index 00] added %r',
currentTrack.number, currentTrack.getIndex(0))
# store the pregapLength to add it when we index 1 for this
# track on the next iteration
pregapLength = length
# look for INDEX lines
m = _INDEX_RE.search(line)
if m:
if not currentTrack:
self.message(number, 'INDEX without preceding TRACK')
print('ouch')
continue
indexNumber += 1
offset = common.msfToFrames(m.group('offset'))
self._index(currentTrack, indexNumber, absoluteOffset, offset)
# handle index 1 of final track, if any
if currentTrack:
self._index(currentTrack, 1, absoluteOffset, pregapLength)
# totalLength was added up to the penultimate track
self.table.leadout = totalLength + currentLength
logger.debug('parse: leadout: %r', self.table.leadout)