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# -*- coding: utf-8 -*-
import copy
from datetime import timedelta
import logging
import os
from typing import cast, Any, Dict, Iterator, List, Optional
import pysubs2
import srt
import six
import sys
logging.basicConfig(level=logging.INFO)
logger: logging.Logger = logging.getLogger(__name__)
class GenericSubtitle:
def __init__(self, start, end, inner):
self.start = start
self.end = end
self.inner = inner
def __eq__(self, other: object) -> bool:
if not isinstance(other, GenericSubtitle):
return False
eq = True
eq = eq and self.start == other.start
eq = eq and self.end == other.end
eq = eq and self.inner == other.inner
return eq
@property
def content(self) -> str:
if isinstance(self.inner, srt.Subtitle):
ret = self.inner.content
elif isinstance(self.inner, pysubs2.SSAEvent):
ret = self.inner.text
else:
raise NotImplementedError(
"unsupported subtitle type: %s" % type(self.inner)
)
return ret
def resolve_inner_timestamps(self):
ret = copy.deepcopy(self.inner)
if isinstance(self.inner, srt.Subtitle):
ret.start = self.start
ret.end = self.end
elif isinstance(self.inner, pysubs2.SSAEvent):
ret.start = pysubs2.make_time(s=self.start.total_seconds())
ret.end = pysubs2.make_time(s=self.end.total_seconds())
else:
raise NotImplementedError(
"unsupported subtitle type: %s" % type(self.inner)
)
return ret
def merge_with(self, other):
assert isinstance(self.inner, type(other.inner))
inner_merged = copy.deepcopy(self.inner)
if isinstance(self.inner, srt.Subtitle):
inner_merged.content = "{}\n{}".format(
inner_merged.content, other.inner.content
)
return self.__class__(self.start, self.end, inner_merged)
else:
raise NotImplementedError(
"unsupported subtitle type: %s" % type(self.inner)
)
@classmethod
def wrap_inner_subtitle(cls, sub) -> "GenericSubtitle":
if isinstance(sub, srt.Subtitle):
return cls(sub.start, sub.end, sub)
elif isinstance(sub, pysubs2.SSAEvent):
return cls(
timedelta(milliseconds=sub.start), timedelta(milliseconds=sub.end), sub
)
else:
raise NotImplementedError("unsupported subtitle type: %s" % type(sub))
class GenericSubtitlesFile:
def __init__(self, subs: List[GenericSubtitle], *_, **kwargs: Any):
sub_format: str = cast(str, kwargs.pop("sub_format", None))
if sub_format is None:
raise ValueError("format must be specified")
encoding: str = cast(str, kwargs.pop("encoding", None))
if encoding is None:
raise ValueError("encoding must be specified")
self.subs_: List[GenericSubtitle] = subs
self._sub_format: str = sub_format
self._encoding: str = encoding
self._styles: Optional[Dict[str, pysubs2.SSAStyle]] = kwargs.pop("styles", None)
self._fonts_opaque: Optional[Dict[str, Any]] = kwargs.pop("fonts_opaque", None)
self._info: Optional[Dict[str, str]] = kwargs.pop("info", None)
def set_encoding(self, encoding: str) -> "GenericSubtitlesFile":
if encoding != "same":
self._encoding = encoding
return self
def __len__(self) -> int:
return len(self.subs_)
def __getitem__(self, item: int) -> GenericSubtitle:
return self.subs_[item]
def __iter__(self) -> Iterator[GenericSubtitle]:
return iter(self.subs_)
def clone_props_for_subs(
self, new_subs: List[GenericSubtitle]
) -> "GenericSubtitlesFile":
return GenericSubtitlesFile(
new_subs,
sub_format=self._sub_format,
encoding=self._encoding,
styles=self._styles,
fonts_opaque=self._fonts_opaque,
info=self._info,
)
def gen_raw_resolved_subs(self):
for sub in self.subs_:
yield sub.resolve_inner_timestamps()
def offset(self, td: timedelta) -> "GenericSubtitlesFile":
offset_subs = []
for sub in self.subs_:
offset_subs.append(GenericSubtitle(sub.start + td, sub.end + td, sub.inner))
return self.clone_props_for_subs(offset_subs)
def write_file(self, fname: str) -> None:
# TODO: converter to go between self.subs_format and out_format
if fname is None:
out_format = self._sub_format
else:
out_format = os.path.splitext(fname)[-1][1:]
subs = list(self.gen_raw_resolved_subs())
if self._sub_format in ("ssa", "ass"):
ssaf = pysubs2.SSAFile()
ssaf.events = subs
if self._styles is not None:
ssaf.styles = self._styles
if self._info is not None:
ssaf.info = self._info
if self._fonts_opaque is not None:
ssaf.fonts_opaque = self._fonts_opaque
to_write = ssaf.to_string(out_format)
elif self._sub_format == "srt" and out_format in ("ssa", "ass"):
to_write = pysubs2.SSAFile.from_string(srt.compose(subs)).to_string(
out_format
)
elif out_format == "srt":
to_write = srt.compose(subs)
else:
raise NotImplementedError("unsupported output format: %s" % out_format)
to_write = to_write.encode(self._encoding)
if six.PY3:
with open(fname or sys.stdout.fileno(), "wb") as f:
f.write(to_write)
else:
with (fname and open(fname, "wb")) or sys.stdout as f:
f.write(to_write)
class SubsMixin:
def __init__(self, subs: Optional[GenericSubtitlesFile] = None) -> None:
self.subs_: Optional[GenericSubtitlesFile] = subs
def set_encoding(self, encoding: str) -> "SubsMixin":
self.subs_.set_encoding(encoding)
return self
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