mirror of
https://github.com/SickGear/SickGear.git
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277 lines
13 KiB
Python
277 lines
13 KiB
Python
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# -*- coding: utf-8 -*-
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# Copyright 2011-2012 Antoine Bertin <diaoulael@gmail.com>
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#
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# This file is part of subliminal.
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#
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# subliminal is free software; you can redistribute it and/or modify it under
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# the terms of the GNU Lesser 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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# subliminal 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 Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with subliminal. If not, see <http://www.gnu.org/licenses/>.
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from .exceptions import DownloadFailedError
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from .services import ServiceConfig
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from .tasks import DownloadTask, ListTask
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from .utils import get_keywords
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from .videos import Episode, Movie, scan
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from .language import Language
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from collections import defaultdict
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from itertools import groupby
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import bs4
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import guessit
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import logging
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from six import iteritems
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__all__ = ['SERVICES', 'LANGUAGE_INDEX', 'SERVICE_INDEX', 'SERVICE_CONFIDENCE', 'MATCHING_CONFIDENCE',
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'create_list_tasks', 'create_download_tasks', 'consume_task', 'matching_confidence',
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'key_subtitles', 'group_by_video']
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logger = logging.getLogger("subliminal")
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SERVICES = ['opensubtitles', 'thesubdb', 'addic7ed', 'tvsubtitles']
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LANGUAGE_INDEX, SERVICE_INDEX, SERVICE_CONFIDENCE, MATCHING_CONFIDENCE = range(4)
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def create_list_tasks(paths, languages, services, force, multi, cache_dir, max_depth, scan_filter):
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"""Create a list of :class:`~subliminal.tasks.ListTask` from one or more paths using the given criteria
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:param paths: path(s) to video file or folder
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:type paths: string or list
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:param set languages: languages to search for
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:param list services: services to use for the search
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:param bool force: force searching for subtitles even if some are detected
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:param bool multi: search multiple languages for the same video
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:param string cache_dir: path to the cache directory to use
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:param int max_depth: maximum depth for scanning entries
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:param function scan_filter: filter function that takes a path as argument and returns a boolean indicating whether it has to be filtered out (``True``) or not (``False``)
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:return: the created tasks
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:rtype: list of :class:`~subliminal.tasks.ListTask`
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"""
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scan_result = []
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for p in paths:
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scan_result.extend(scan(p, max_depth, scan_filter))
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logger.debug(u'Found %d videos in %r with maximum depth %d' % (len(scan_result), paths, max_depth))
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tasks = []
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config = ServiceConfig(multi, cache_dir)
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services = filter_services(services)
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for video, detected_subtitles in scan_result:
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detected_languages = set(s.language for s in detected_subtitles)
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wanted_languages = languages.copy()
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if not force and multi:
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wanted_languages -= detected_languages
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if not wanted_languages:
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logger.debug(u'No need to list multi subtitles %r for %r because %r detected' % (languages, video, detected_languages))
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continue
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if not force and not multi and Language('Undetermined') in detected_languages:
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logger.debug(u'No need to list single subtitles %r for %r because one detected' % (languages, video))
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continue
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logger.debug(u'Listing subtitles %r for %r with services %r' % (wanted_languages, video, services))
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for service_name in services:
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mod = __import__('services.' + service_name, globals=globals(), locals=locals(), fromlist=['Service'], level=1)
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service = mod.Service
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if not service.check_validity(video, wanted_languages):
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continue
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task = ListTask(video, wanted_languages & service.languages, service_name, config)
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logger.debug(u'Created task %r' % task)
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tasks.append(task)
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return tasks
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def create_download_tasks(subtitles_by_video, languages, multi):
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"""Create a list of :class:`~subliminal.tasks.DownloadTask` from a list results grouped by video
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:param subtitles_by_video: :class:`~subliminal.tasks.ListTask` results with ordered subtitles
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:type subtitles_by_video: dict of :class:`~subliminal.videos.Video` => [:class:`~subliminal.subtitles.Subtitle`]
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:param languages: languages in preferred order
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:type languages: :class:`~subliminal.language.language_list`
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:param bool multi: download multiple languages for the same video
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:return: the created tasks
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:rtype: list of :class:`~subliminal.tasks.DownloadTask`
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"""
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tasks = []
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for video, subtitles in iteritems(subtitles_by_video):
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if not subtitles:
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continue
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if not multi:
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task = DownloadTask(video, list(subtitles))
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logger.debug(u'Created task %r' % task)
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tasks.append(task)
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continue
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for _, by_language in groupby(subtitles, lambda s: languages.index(s.language)):
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task = DownloadTask(video, list(by_language))
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logger.debug(u'Created task %r' % task)
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tasks.append(task)
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return tasks
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def consume_task(task, services=None, os_auth=None):
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"""Consume a task. If the ``services`` parameter is given, the function will attempt
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to get the service from it. In case the service is not in ``services``, it will be initialized
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and put in ``services``
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:param task: task to consume
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:type task: :class:`~subliminal.tasks.ListTask` or :class:`~subliminal.tasks.DownloadTask`
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:param dict services: mapping between the service name and an instance of this service
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:return: the result of the task
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:rtype: list of :class:`~subliminal.subtitles.ResultSubtitle`
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"""
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if services is None:
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services = {}
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logger.info(u'Consuming %r' % task)
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result = None
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if isinstance(task, ListTask):
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service = get_service(services, task.service, config=task.config, os_auth=os_auth)
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result = service.list(task.video, task.languages)
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elif isinstance(task, DownloadTask):
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for subtitle in task.subtitles:
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service = get_service(services, subtitle.service)
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try:
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service.download(subtitle)
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result = [subtitle]
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break
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except DownloadFailedError:
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logger.warning(u'Could not download subtitle %r, trying next' % subtitle)
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continue
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if result is None:
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logger.error(u'No subtitles could be downloaded for video %r' % task.video)
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return result
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def matching_confidence(video, subtitle):
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"""Compute the probability (confidence) that the subtitle matches the video
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:param video: video to match
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:type video: :class:`~subliminal.videos.Video`
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:param subtitle: subtitle to match
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:type subtitle: :class:`~subliminal.subtitles.Subtitle`
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:return: the matching probability
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:rtype: float
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"""
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guess = guessit.guess_file_info(subtitle.release, 'autodetect')
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video_keywords = get_keywords(video.guess)
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subtitle_keywords = get_keywords(guess) | subtitle.keywords
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logger.debug(u'Video keywords %r - Subtitle keywords %r' % (video_keywords, subtitle_keywords))
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replacement = {'keywords': len(video_keywords & subtitle_keywords)}
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if isinstance(video, Episode):
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replacement.update({'series': 0, 'season': 0, 'episode': 0})
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matching_format = '{series:b}{season:b}{episode:b}{keywords:03b}'
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best = matching_format.format(series=1, season=1, episode=1, keywords=len(video_keywords))
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if guess['type'] in ['episode', 'episodesubtitle']:
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if 'series' in guess and guess['series'].lower() == video.series.lower():
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replacement['series'] = 1
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if 'season' in guess and guess['season'] == video.season:
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replacement['season'] = 1
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if 'episodeNumber' in guess and guess['episodeNumber'] == video.episode:
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replacement['episode'] = 1
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elif isinstance(video, Movie):
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replacement.update({'title': 0, 'year': 0})
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matching_format = '{title:b}{year:b}{keywords:03b}'
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best = matching_format.format(title=1, year=1, keywords=len(video_keywords))
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if guess['type'] in ['movie', 'moviesubtitle']:
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if 'title' in guess and guess['title'].lower() == video.title.lower():
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replacement['title'] = 1
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if 'year' in guess and guess['year'] == video.year:
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replacement['year'] = 1
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else:
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logger.debug(u'Not able to compute confidence for %r' % video)
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return 0.0
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logger.debug(u'Found %r' % replacement)
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confidence = float(int(matching_format.format(**replacement), 2)) / float(int(best, 2))
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logger.info(u'Computed confidence %.4f for %r and %r' % (confidence, video, subtitle))
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return confidence
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def get_service(services, service_name, config=None, os_auth=None):
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"""Get a service from its name in the service dict with the specified config.
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If the service does not exist in the service dict, it is created and added to the dict.
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:param dict services: dict where to get existing services or put created ones
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:param string service_name: name of the service to get
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:param config: config to use for the service
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:type config: :class:`~subliminal.services.ServiceConfig` or None
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:return: the corresponding service
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:rtype: :class:`~subliminal.services.ServiceBase`
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"""
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if service_name not in services:
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mod = __import__('services.' + service_name, globals=globals(), locals=locals(), fromlist=['Service'], level=1)
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services[service_name] = mod.Service(**(dict(os_auth=os_auth), {})[not hasattr(mod.Service, 'username')])
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services[service_name].init()
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services[service_name].config = config
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return services[service_name]
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def key_subtitles(subtitle, video, languages, services, order):
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"""Create a key to sort subtitle using the given order
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:param subtitle: subtitle to sort
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:type subtitle: :class:`~subliminal.subtitles.ResultSubtitle`
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:param video: video to match
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:type video: :class:`~subliminal.videos.Video`
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:param list languages: languages in preferred order
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:param list services: services in preferred order
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:param order: preferred order for subtitles sorting
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:type list: list of :data:`LANGUAGE_INDEX`, :data:`SERVICE_INDEX`, :data:`SERVICE_CONFIDENCE`, :data:`MATCHING_CONFIDENCE`
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:return: a key ready to use for subtitles sorting
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:rtype: int
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"""
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key = ''
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for sort_item in order:
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if sort_item == LANGUAGE_INDEX:
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key += '{0:03d}'.format(len(languages) - languages.index(subtitle.language) - 1)
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key += '{0:01d}'.format(subtitle.language == languages[languages.index(subtitle.language)])
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elif sort_item == SERVICE_INDEX:
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key += '{0:02d}'.format(len(services) - services.index(subtitle.service) - 1)
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elif sort_item == SERVICE_CONFIDENCE:
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key += '{0:04d}'.format(int(subtitle.confidence * 1000))
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elif sort_item == MATCHING_CONFIDENCE:
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confidence = 0
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if subtitle.release:
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confidence = matching_confidence(video, subtitle)
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key += '{0:04d}'.format(int(confidence * 1000))
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return int(key)
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def group_by_video(list_results):
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"""Group the results of :class:`ListTasks <subliminal.tasks.ListTask>` into a
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dictionary of :class:`~subliminal.videos.Video` => :class:`~subliminal.subtitles.Subtitle`
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:param list_results:
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:type list_results: list of result of :class:`~subliminal.tasks.ListTask`
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:return: subtitles grouped by videos
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:rtype: dict of :class:`~subliminal.videos.Video` => [:class:`~subliminal.subtitles.Subtitle`]
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"""
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result = defaultdict(list)
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for video, subtitles in list_results:
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result[video] += subtitles or []
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return result
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def filter_services(services):
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"""Filter out services that are not available because of a missing feature
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:param list services: service names to filter
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:return: a copy of the initial list of service names without unavailable ones
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:rtype: list
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"""
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filtered_services = services[:]
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for service_name in services:
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mod = __import__('services.' + service_name, globals=globals(), locals=locals(), fromlist=['Service'], level=1)
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service = mod.Service
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if service.required_features is not None and bs4.builder_registry.lookup(*service.required_features) is None:
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logger.warning(u'Service %s not available: none of available features could be used. One of %r required' % (service_name, service.required_features))
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filtered_services.remove(service_name)
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return filtered_services
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