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131 lines
3.8 KiB
131 lines
3.8 KiB
import os
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import traceback
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import typing
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from knowit import __version__
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from knowit.config import Config
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from knowit.provider import Provider
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from .providers import (
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EnzymeProvider,
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FFmpegProvider,
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MediaInfoProvider,
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MkvMergeProvider,
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)
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_provider_map = {
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'mediainfo': MediaInfoProvider,
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'ffmpeg': FFmpegProvider,
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'mkvmerge': MkvMergeProvider,
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'enzyme': EnzymeProvider,
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}
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provider_names = _provider_map.keys()
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available_providers: typing.Dict[str, Provider] = {}
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class KnowitException(Exception):
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"""Exception raised when knowit encounters an internal error."""
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def initialize(context: typing.Optional[typing.Mapping] = None) -> None:
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"""Initialize knowit."""
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if not available_providers:
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context = context or {}
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config = Config.build(context.get('config'))
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for name, provider_cls in _provider_map.items():
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general_config = getattr(config, 'general', {})
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mapping = context.get(name) or general_config.get(name)
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available_providers[name] = provider_cls(config, mapping)
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def know(
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video_path: typing.Union[str, os.PathLike],
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context: typing.Optional[typing.MutableMapping] = None
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) -> typing.Mapping:
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"""Return a mapping of video metadata."""
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video_path = os.fspath(video_path)
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try:
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context = context or {}
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context.setdefault('profile', 'default')
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initialize(context)
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for name, provider in available_providers.items():
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if name != (context.get('provider') or name):
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continue
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if provider.accepts(video_path):
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result = provider.describe(video_path, context)
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if result:
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return result
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return {}
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except Exception:
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raise KnowitException(debug_info(context=context, exc_info=True))
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def dependencies(context: typing.Optional[typing.Mapping] = None) -> typing.Mapping:
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"""Return all dependencies detected by knowit."""
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deps = {}
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try:
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initialize(context)
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for name, provider_cls in _provider_map.items():
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if name in available_providers:
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deps[name] = available_providers[name].version
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else:
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deps[name] = {}
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except Exception:
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pass
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return deps
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def _centered(value: str) -> str:
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value = value[-52:]
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return f'| {value:^53} |'
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def debug_info(
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context: typing.Optional[typing.MutableMapping] = None,
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exc_info: bool = False,
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) -> str:
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lines = [
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'+-------------------------------------------------------+',
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_centered(f'KnowIt {__version__}'),
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'+-------------------------------------------------------+'
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]
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first = True
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for key, info in dependencies(context).items():
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if not first:
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lines.append(_centered(''))
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first = False
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for k, v in info.items():
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lines.append(_centered(k))
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lines.append(_centered(v))
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if context:
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debug_data = context.pop('debug_data', None)
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lines.append('+-------------------------------------------------------+')
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for k, v in context.items():
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if v:
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lines.append(_centered(f'{k}: {v}'))
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if debug_data:
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lines.append('+-------------------------------------------------------+')
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lines.append(debug_data())
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if exc_info:
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lines.append('+-------------------------------------------------------+')
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lines.append(traceback.format_exc())
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lines.append('+-------------------------------------------------------+')
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lines.append(_centered('Please report any bug or feature request at'))
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lines.append(_centered('https://github.com/ratoaq2/knowit/issues.'))
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lines.append('+-------------------------------------------------------+')
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return '\n'.join(lines)
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