/usr/lib/python3/dist-packages/aeidon/files/mpsub.py is in python3-aeidon 0.24.3-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 | # -*- coding: utf-8 -*-
# Copyright (C) 2006-2009 Osmo Salomaa
#
# This file is part of Gaupol.
#
# Gaupol is free software: you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the Free Software
# Foundation, either version 3 of the License, or (at your option) any later
# version.
#
# Gaupol is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# Gaupol. If not, see <http://www.gnu.org/licenses/>.
"""MPsub file."""
import aeidon
import re
__all__ = ("MPsub",)
class MPsub(aeidon.SubtitleFile):
"""
MPsub file.
:ivar framerate: :attr:`aeidon.framerates` item for current framerate
:ivar mode: :attr:`aeidon.modes` item for current native mode
Instance variables :attr:`framerate` and :attr:`mode` depend on what is
written on the first line of the file header. They will be determined when
the file is read and are changed when :meth:`set_header` is called.
"""
_re_position_line = re.compile(r"^(-?[\d.]+) (-?[\d.]+)\s*$")
format = aeidon.formats.MPSUB
mode = aeidon.modes.TIME
def __init__(self, path, encoding, newline=None):
"""Initialize an :class:`MPsub` object."""
aeidon.SubtitleFile.__init__(self, path, encoding, newline)
self.framerate = aeidon.framerates.NONE
self.mode = aeidon.modes.TIME
def _get_frames(self, subtitles):
"""Return MPsub-style start and end frames."""
starts = [x.start_frame for x in subtitles]
ends = [x.end_frame for x in subtitles]
for i in reversed(range(1, len(subtitles))):
ends[i] = ends[i] - starts[i]
starts[i] = starts[i] - ends[i - 1]
ends[0] = ends[0] - starts[0]
return list(map(str, starts)), list(map(str, ends))
def _get_positions(self, subtitles):
"""Return MPsub-style start and end positions."""
if self.mode == aeidon.modes.TIME:
return self._get_times(subtitles)
if self.mode == aeidon.modes.FRAME:
return self._get_frames(subtitles)
raise ValueError("Invalid mode: {}"
.format(repr(self.mode)))
def _get_times(self, subtitles):
"""Return MPsub-style start and end times."""
starts = [x.start_seconds for x in subtitles]
ends = [x.end_seconds for x in subtitles]
deviation = 0
# Avoid cumulation of rounding errors by keeping track of deviations
# and adjusting times so that the deviation stays close to zero.
for i in reversed(range(1, len(subtitles))):
real_diff = ends[i] - starts[i]
ends[i] = round(real_diff - deviation, 2)
deviation += (ends[i] - real_diff)
real_diff = starts[i] - ends[i - 1]
starts[i] = round(real_diff - deviation, 2)
deviation += (starts[i] - real_diff)
ends[0] = ends[0] - starts[0]
to_string = lambda x: ("{:.2f}".format(x)).replace("-0.00", "0.00")
return list(map(to_string, starts)), list(map(to_string, ends))
def _read_header(self, lines):
"""Read header and remove its lines."""
header = ""
while not self._re_position_line.match(lines[0]):
header += "\n"
header += lines.pop(0)
header = header.lstrip()
self.set_header(header)
def _read_lines(self):
"""Read file to a unicoded list of lines."""
lines = ["\n"]
for line in aeidon.SubtitleFile._read_lines(self):
lines.append(line)
match = self._re_position_line.match(line)
if match is None: continue
# Remove blank lines above position lines.
if not lines[-2].strip():
lines.pop(-2)
return lines
def copy_from(self, other):
"""Copy generic properties from `other`."""
aeidon.SubtitleFile.copy_from(self, other)
if self.format == other.format:
self.mode = other.mode
self.framerate = other.framerate
def read(self):
"""
Read file and return subtitles.
Raise :exc:`IOError` if reading fails.
Raise :exc:`UnicodeError` if decoding fails.
"""
subtitles = []
lines = self._read_lines()
self._read_header(lines)
convert = (aeidon.as_seconds
if self.mode == aeidon.modes.TIME
else aeidon.as_frame)
end = convert("0")
for line in lines:
match = self._re_position_line.match(line)
if match is None:
if subtitles[-1].main_text:
subtitles[-1].main_text += "\n"
subtitles[-1].main_text += line
continue
subtitle = self._get_subtitle()
start = end + convert(match.group(1))
end = start + convert(match.group(2))
subtitle.start = start
subtitle.end = end
subtitles.append(subtitle)
return subtitles
def set_header(self, header):
"""
Parse and set header, mode and framerate.
Raise :exc:`ValueError` if ``FORMAT`` line is invalid.
"""
mode = aeidon.modes.NONE
framerates = dict((x.mpsub, x) for x in aeidon.framerates)
for line in header.split("\n"):
if line.startswith("FORMAT="):
mode = line[7:].strip()
if mode == "TIME":
self.mode = aeidon.modes.TIME
self.framerate = aeidon.framerates.NONE
return setattr(self, "header", header)
if mode in list(framerates.keys()):
self.mode = aeidon.modes.FRAME
self.framerate = framerates[mode]
return setattr(self, "header", header)
raise ValueError("Invalid FORMAT line: {}"
.format(repr(header)))
def write_to_file(self, subtitles, doc, fobj):
"""
Write `subtitles` from `doc` to `fobj`.
Raise :exc:`IOError` if writing fails.
Raise :exc:`UnicodeError` if encoding fails.
"""
n = self.newline.value
header = self.header.replace("\n", n)
fobj.write("{}{}{}".format(header, n, n))
starts, ends = self._get_positions(subtitles)
for i, subtitle in enumerate(subtitles):
if i > 0: fobj.write(n)
fobj.write("{} {}{}".format(starts[i], ends[i], n))
text = subtitle.get_text(doc).replace("\n", n)
fobj.write("{}{}".format(text, n))
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