mirror of https://github.com/morpheus65535/bazarr
377 lines
16 KiB
Python
377 lines
16 KiB
Python
# -*- coding: utf-8 -*-
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from .exceptions import ParserError, MalformedMKVError
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from .parsers import ebml
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from datetime import timedelta
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import logging
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__all__ = ['VIDEO_TRACK', 'AUDIO_TRACK', 'SUBTITLE_TRACK', 'MKV', 'Info', 'Track', 'VideoTrack',
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'AudioTrack', 'SubtitleTrack', 'Tag', 'SimpleTag', 'Chapter']
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logger = logging.getLogger(__name__)
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# Track types
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VIDEO_TRACK, AUDIO_TRACK, SUBTITLE_TRACK = 0x01, 0x02, 0x11
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class MKV(object):
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"""Matroska Video file
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:param stream: seekable file-like object
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"""
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def __init__(self, stream, recurse_seek_head=False):
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# default attributes
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self.info = None
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self.video_tracks = []
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self.audio_tracks = []
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self.subtitle_tracks = []
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self.chapters = []
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self.tags = []
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# keep track of the elements parsed
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self.recurse_seek_head = recurse_seek_head
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self._parsed_positions = set()
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try:
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# get the Segment element
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logger.info('Reading Segment element')
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specs = ebml.get_matroska_specs()
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segments = ebml.parse(stream, specs, ignore_element_names=['EBML'], max_level=0)
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if not segments:
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raise MalformedMKVError('No Segment found')
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if len(segments) > 1:
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logger.warning('%d segments found, using the first one', len(segments))
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segment = segments[0]
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# get and recursively parse the SeekHead element
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logger.info('Reading SeekHead element')
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stream.seek(segment.position)
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seek_head = ebml.parse_element(stream, specs)
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if seek_head.name != 'SeekHead':
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raise MalformedMKVError('No SeekHead found')
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seek_head.load(stream, specs, ignore_element_names=['Void', 'CRC-32'])
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self._parse_seekhead(seek_head, segment, stream, specs)
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except ParserError as e:
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raise MalformedMKVError('Parsing error: %s' % e)
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def _parse_seekhead(self, seek_head, segment, stream, specs):
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for seek in seek_head:
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element_id = ebml.read_element_id(seek['SeekID'].data)
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element_name = specs[element_id][1]
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element_position = seek['SeekPosition'].data + segment.position
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if element_position in self._parsed_positions:
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logger.warning('Skipping already parsed %s element at position %d', element_name, element_position)
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continue
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if element_name == 'Info':
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logger.info('Processing element %s from SeekHead at position %d', element_name, element_position)
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element = self._load_element(stream, specs, element_position)
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self.info = Info.fromelement(element)
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elif element_name == 'Tracks':
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logger.info('Processing element %s from SeekHead at position %d', element_name, element_position)
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tracks = self._load_element(stream, specs, element_position)
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self.video_tracks.extend([VideoTrack.fromelement(t) for t in tracks if t['TrackType'].data == VIDEO_TRACK])
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self.audio_tracks.extend([AudioTrack.fromelement(t) for t in tracks if t['TrackType'].data == AUDIO_TRACK])
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self.subtitle_tracks.extend([SubtitleTrack.fromelement(t) for t in tracks if t['TrackType'].data == SUBTITLE_TRACK])
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elif element_name == 'Chapters':
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logger.info('Processing element %s from SeekHead at position %d', element_name, element_position)
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element = self._load_element(stream, specs, element_position)
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self.chapters.extend([Chapter.fromelement(c) for c in element[0] if c.name == 'ChapterAtom'])
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elif element_name == 'Tags':
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logger.info('Processing element %s from SeekHead at position %d', element_name, element_position)
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element = self._load_element(stream, specs, element_position)
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self.tags.extend([Tag.fromelement(t) for t in element])
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elif element_name == 'SeekHead' and self.recurse_seek_head:
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logger.info('Processing element %s from SeekHead at position %d', element_name, element_position)
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element = self._load_element(stream, specs, element_position)
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self._parse_seekhead(element, segment, stream, specs)
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else:
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logger.debug('Element %s ignored', element_name)
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self._parsed_positions.add(element_position)
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def _load_element(self,stream, specs, position):
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stream.seek(position)
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element = ebml.parse_element(stream,specs)
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element.load(stream, specs, ignore_element_names=['Void', 'CRC-32'])
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return element
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def get_srt_subtitles_track_by_language(self):
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"""get a dictionary of the SRT subtitles track id's indexed by language"""
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subtitles = dict()
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for track in self.subtitle_tracks:
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logger.info("Found subtitle language %s, with codec %s and lacing %s",
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track.language,track.codec_id,track.lacing)
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if not track.is_srt():
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logger.debug("Ignoring subtitle language %s with codec %s",track.language,track.codec_id)
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elif track.lacing:
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logger.info("Ignoring subtitle language %s with lacing %s",track.language,track.lacing)
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else:
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subtitles[track.language] = track
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return subtitles
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def to_dict(self):
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return {'info': self.info.__dict__, 'video_tracks': [t.__dict__ for t in self.video_tracks],
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'audio_tracks': [t.__dict__ for t in self.audio_tracks], 'subtitle_tracks': [t.__dict__ for t in self.subtitle_tracks],
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'chapters': [c.__dict__ for c in self.chapters], 'tags': [t.__dict__ for t in self.tags]}
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def __repr__(self):
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return '<%s [%r, %r, %r, %r]>' % (self.__class__.__name__, self.info, self.video_tracks, self.audio_tracks, self.subtitle_tracks)
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class Info(object):
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"""Object for the Info EBML element"""
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def __init__(self, title=None, duration=None, date_utc=None, timecode_scale=None, muxing_app=None, writing_app=None):
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self.title = title
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self.timecode_scale = timecode_scale
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self.duration = timedelta(microseconds=duration * (timecode_scale or 1000000) // 1000) if duration else None
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self.date_utc = date_utc
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self.muxing_app = muxing_app
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self.writing_app = writing_app
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@classmethod
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def fromelement(cls, element):
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"""Load the :class:`Info` from an :class:`~enzyme.parsers.ebml.Element`
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:param element: the Info element
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:type element: :class:`~enzyme.parsers.ebml.Element`
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"""
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title = element.get('Title')
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duration = element.get('Duration')
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date_utc = element.get('DateUTC')
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timecode_scale = element.get('TimecodeScale',1000000)
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muxing_app = element.get('MuxingApp')
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writing_app = element.get('WritingApp')
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return cls(title, duration, date_utc, timecode_scale, muxing_app, writing_app)
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def __repr__(self):
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return '<%s [title=%r, duration=%s, date=%s]>' % (self.__class__.__name__, self.title, self.duration, self.date_utc)
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def __str__(self):
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return repr(self.__dict__)
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class Track(object):
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"""Base object for the Tracks EBML element"""
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def __init__(self, type=None, number=None, name=None, language=None, enabled=None, default=None, forced=None, lacing=None,
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codec_id=None, codec_name=None):
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self.type = type
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self.number = number
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self.name = name
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self.language = language
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self.enabled = enabled
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self.default = default
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self.forced = forced
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self.lacing = lacing
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self.codec_id = codec_id
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self.codec_name = codec_name
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@classmethod
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def fromelement(cls, element):
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"""Load the :class:`Track` from an :class:`~enzyme.parsers.ebml.Element`
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:param element: the Track element
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:type element: :class:`~enzyme.parsers.ebml.Element`
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"""
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type = element.get('TrackType')
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number = element.get('TrackNumber', 0)
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name = element.get('Name')
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language = element.get('Language','eng')
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enabled = bool(element.get('FlagEnabled', 1))
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default = bool(element.get('FlagDefault', 1))
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forced = bool(element.get('FlagForced', 0))
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lacing = bool(element.get('FlagLacing', 1))
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codec_id = element.get('CodecID')
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codec_name = element.get('CodecName')
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return cls(type=type, number=number, name=name, language=language, enabled=enabled, default=default,
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forced=forced, lacing=lacing, codec_id=codec_id, codec_name=codec_name)
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def __repr__(self):
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return '<%s [%d, name=%r, language=%s]>' % (self.__class__.__name__, self.number, self.name, self.language)
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def __str__(self):
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return str(self.__dict__)
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class VideoTrack(Track):
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"""Object for the Tracks EBML element with :data:`VIDEO_TRACK` TrackType"""
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def __init__(self, width=0, height=0, interlaced=False, stereo_mode=None, crop=None,
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display_width=None, display_height=None, display_unit=None, aspect_ratio_type=None, **kwargs):
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super(VideoTrack, self).__init__(**kwargs)
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self.width = width
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self.height = height
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self.interlaced = interlaced
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self.stereo_mode = stereo_mode
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self.crop = crop
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self.display_width = display_width
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self.display_height = display_height
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self.display_unit = display_unit
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self.aspect_ratio_type = aspect_ratio_type
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@classmethod
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def fromelement(cls, element):
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"""Load the :class:`VideoTrack` from an :class:`~enzyme.parsers.ebml.Element`
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:param element: the Track element with :data:`VIDEO_TRACK` TrackType
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:type element: :class:`~enzyme.parsers.ebml.Element`
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"""
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videotrack = super(VideoTrack, cls).fromelement(element)
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videotrack.width = element['Video'].get('PixelWidth', 0)
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videotrack.height = element['Video'].get('PixelHeight', 0)
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videotrack.interlaced = bool(element['Video'].get('FlagInterlaced', False))
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videotrack.stereo_mode = element['Video'].get('StereoMode')
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videotrack.crop = {}
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if 'PixelCropTop' in element['Video']:
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videotrack.crop['top'] = element['Video']['PixelCropTop']
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if 'PixelCropBottom' in element['Video']:
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videotrack.crop['bottom'] = element['Video']['PixelCropBottom']
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if 'PixelCropLeft' in element['Video']:
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videotrack.crop['left'] = element['Video']['PixelCropLeft']
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if 'PixelCropRight' in element['Video']:
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videotrack.crop['right'] = element['Video']['PixelCropRight']
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videotrack.display_width = element['Video'].get('DisplayWidth')
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videotrack.display_height = element['Video'].get('DisplayHeight')
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videotrack.display_unit = element['Video'].get('DisplayUnit')
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videotrack.aspect_ratio_type = element['Video'].get('AspectRatioType')
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return videotrack
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def __repr__(self):
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return '<%s [%d, %dx%d, %s, name=%r, language=%s]>' % (self.__class__.__name__, self.number, self.width, self.height,
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self.codec_id, self.name, self.language)
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def __str__(self):
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return str(self.__dict__)
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class AudioTrack(Track):
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"""Object for the Tracks EBML element with :data:`AUDIO_TRACK` TrackType"""
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def __init__(self, sampling_frequency=None, channels=None, output_sampling_frequency=None, bit_depth=None, **kwargs):
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super(AudioTrack, self).__init__(**kwargs)
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self.sampling_frequency = sampling_frequency
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self.channels = channels
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self.output_sampling_frequency = output_sampling_frequency
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self.bit_depth = bit_depth
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@classmethod
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def fromelement(cls, element):
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"""Load the :class:`AudioTrack` from an :class:`~enzyme.parsers.ebml.Element`
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:param element: the Track element with :data:`AUDIO_TRACK` TrackType
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:type element: :class:`~enzyme.parsers.ebml.Element`
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"""
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audiotrack = super(AudioTrack, cls).fromelement(element)
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audiotrack.sampling_frequency = element['Audio'].get('SamplingFrequency', 8000.0)
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audiotrack.channels = element['Audio'].get('Channels', 1)
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audiotrack.output_sampling_frequency = element['Audio'].get('OutputSamplingFrequency')
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audiotrack.bit_depth = element['Audio'].get('BitDepth')
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return audiotrack
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def __repr__(self):
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return '<%s [%d, %d channel(s), %.0fHz, %s, name=%r, language=%s]>' % (self.__class__.__name__, self.number, self.channels,
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self.sampling_frequency, self.codec_id, self.name, self.language)
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class SubtitleTrack(Track):
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"""Object for the Tracks EBML element with :data:`SUBTITLE_TRACK` TrackType"""
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def is_srt(self):
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return self.codec_id == 'S_TEXT/UTF8'
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class Tag(object):
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"""Object for the Tag EBML element"""
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def __init__(self, targets=None, simpletags=None):
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self.targets = targets if targets is not None else []
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self.simpletags = simpletags if simpletags is not None else []
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@classmethod
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def fromelement(cls, element):
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"""Load the :class:`Tag` from an :class:`~enzyme.parsers.ebml.Element`
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:param element: the Tag element
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:type element: :class:`~enzyme.parsers.ebml.Element`
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"""
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targets = element['Targets'] if 'Targets' in element else []
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simpletags = [SimpleTag.fromelement(s) for s in element if s.name == 'SimpleTag']
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return cls(targets, simpletags)
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def __repr__(self):
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return '<%s [targets=%r, simpletags=%r]>' % (self.__class__.__name__, self.targets, self.simpletags)
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class SimpleTag(object):
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"""Object for the SimpleTag EBML element"""
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def __init__(self, name, language='und', default=True, string=None, binary=None):
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self.name = name
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self.language = language
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self.default = default
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self.string = string
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self.binary = binary
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@classmethod
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def fromelement(cls, element):
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"""Load the :class:`SimpleTag` from an :class:`~enzyme.parsers.ebml.Element`
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:param element: the SimpleTag element
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:type element: :class:`~enzyme.parsers.ebml.Element`
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"""
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name = element.get('TagName')
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language = element.get('TagLanguage', 'und')
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default = element.get('TagDefault', True)
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string = element.get('TagString')
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binary = element.get('TagBinary')
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return cls(name, language, default, string, binary)
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def __repr__(self):
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return '<%s [%s, language=%s, default=%s, string=%s]>' % (self.__class__.__name__, self.name, self.language, self.default, self.string)
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class Chapter(object):
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"""Object for the ChapterAtom and ChapterDisplay EBML element
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.. note::
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For the sake of simplicity, it is assumed that the ChapterAtom element
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has no more than 1 ChapterDisplay child element and informations it contains
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are merged into the :class:`Chapter`
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"""
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def __init__(self, start, hidden=False, enabled=False, end=None, string=None, language=None):
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self.start = start
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self.hidden = hidden
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self.enabled = enabled
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self.end = end
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self.string = string
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self.language = language
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@classmethod
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def fromelement(cls, element):
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"""Load the :class:`Chapter` from an :class:`~enzyme.parsers.ebml.Element`
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:param element: the ChapterAtom element
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:type element: :class:`~enzyme.parsers.ebml.Element`
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"""
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start = timedelta(microseconds=element.get('ChapterTimeStart') // 1000)
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hidden = element.get('ChapterFlagHidden', False)
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enabled = element.get('ChapterFlagEnabled', True)
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end = element.get('ChapterTimeEnd')
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chapterdisplays = [c for c in element if c.name == 'ChapterDisplay']
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if len(chapterdisplays) > 1:
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logger.warning('More than 1 (%d) ChapterDisplay element in the ChapterAtom, using the first one', len(chapterdisplays))
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if chapterdisplays:
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string = chapterdisplays[0].get('ChapString')
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language = chapterdisplays[0].get('ChapLanguage')
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return cls(start, hidden, enabled, end, string, language)
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return cls(start, hidden, enabled, end)
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def __repr__(self):
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return '<%s [%s, enabled=%s]>' % (self.__class__.__name__, self.start, self.enabled)
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