27fd2f16e6
* morituri/test/test_image_image.py: Add a task for calculating frame length of an audio file. Add a test for it.
167 lines
4.8 KiB
Python
167 lines
4.8 KiB
Python
# -*- Mode: Python; test-case-name: morituri.test.test_image_image -*-
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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 on-disk CD images based on the .cue file.
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"""
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import os
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import gst
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from morituri.common import task, crc
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from morituri.image import cue
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class Image:
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def __init__(self, path):
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"""
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@param path: .cue path
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"""
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self._path = path
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self.cue = cue.Cue(path)
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self.cue.parse()
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def getRealPath(self, path):
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"""
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Translate the .cue's FILE to an existing path.
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"""
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if os.path.exists(path):
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return path
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# .cue FILE statements have Windows-style path separators, so convert
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tpath = os.path.join(*path.split('\\'))
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# if the path is relative, make it absolute relative to the cue file
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if tpath != os.path.abspath(tpath):
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tpath = os.path.join(os.path.dirname(self._path), tpath)
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noext, _ = os.path.splitext(tpath)
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for ext in ['wav', 'flac']:
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cpath = '%s.%s' % (noext, ext)
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if os.path.exists(cpath):
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return cpath
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raise KeyError, "Cannot find file for %s" % path
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def setup(self, runner):
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"""
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Do initial setup, like figuring out track lengths.
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"""
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class AudioRipCRCTask(task.Task):
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"""
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I calculate the AudioRip CRC's of all tracks.
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"""
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def __init__(self, image):
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self._image = image
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cue = image.cue
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self._tasks = []
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self._track = 0
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self._tracks = len(cue.tracks)
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self.description = "CRC'ing %d tracks..." % len(cue.tracks)
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self.crcs = []
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for trackIndex, track in enumerate(cue.tracks):
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index = track._indexes[1]
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length = cue.getTrackLength(track)
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file = index[1]
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offset = index[0]
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path = image.getRealPath(file.path)
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crctask = crc.CRCAudioRipTask(path,
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trackNumber=trackIndex + 1, trackCount=len(cue.tracks),
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frameStart=offset * crc.FRAMES_PER_DISC_FRAME,
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frameLength=length * crc.FRAMES_PER_DISC_FRAME)
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self._tasks.append(crctask)
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def start(self, runner):
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task.Task.start(self, runner)
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self._next()
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def _next(self):
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# start next task
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task = self._tasks[0]
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del self._tasks[0]
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self._track += 1
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self.description = "CRC'ing track %2d of %d..." % (
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self._track, self._tracks)
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task.addListener(self)
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task.start(self.runner)
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### listener methods
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def started(self, task):
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pass
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def progressed(self, task, value):
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self.setProgress(value)
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def stopped(self, task):
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self.crcs.append(task.crc)
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if not self._tasks:
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self.stop()
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return
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# pick another
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self.start(self.runner)
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class AudioLengthTask(task.Task):
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"""
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I calculate the length of a track in audio frames.
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@ivar length: length of the decoded audio file, in audio frames.
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"""
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length = None
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def __init__(self, path):
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self._path = path
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def debug(self, *args, **kwargs):
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return
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print args, kwargs
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def start(self, runner):
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task.Task.start(self, runner)
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self._pipeline = gst.parse_launch('''
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filesrc location="%s" !
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decodebin ! audio/x-raw-int !
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fakesink name=sink''' % self._path)
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self.debug('pausing')
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self._pipeline.set_state(gst.STATE_PAUSED)
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self._pipeline.get_state()
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self.debug('paused')
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self.debug('query duration')
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sink = self._pipeline.get_by_name('sink')
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assert sink, 'Error constructing pipeline'
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length, format = sink.query_duration(gst.FORMAT_DEFAULT)
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# wavparse 0.10.14 returns in bytes
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if format == gst.FORMAT_BYTES:
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self.debug('query returned in BYTES format')
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length /= 4
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self.debug('total length', length)
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self.length = length
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self._pipeline.set_state(gst.STATE_NULL)
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self.stop()
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