131 lines
3.5 KiB
Python
131 lines
3.5 KiB
Python
# -*- coding: utf-8 -*-
|
|
# vi:si:et:sw=4:sts=4:ts=4
|
|
from __future__ import division, print_function
|
|
import codecs
|
|
import re
|
|
|
|
import chardet
|
|
import ox
|
|
|
|
|
|
__all__ = []
|
|
|
|
|
|
def _detect_encoding(fp):
|
|
bomDict = { # bytepattern : name
|
|
(0x00, 0x00, 0xFE, 0xFF): "utf_32_be",
|
|
(0xFF, 0xFE, 0x00, 0x00): "utf_32_le",
|
|
(0xFE, 0xFF, None, None): "utf_16_be",
|
|
(0xFF, 0xFE, None, None): "utf_16_le",
|
|
(0xEF, 0xBB, 0xBF, None): "utf_8",
|
|
}
|
|
|
|
# go to beginning of file and get the first 4 bytes
|
|
oldFP = fp.tell()
|
|
fp.seek(0)
|
|
(byte1, byte2, byte3, byte4) = fp.read(4)
|
|
|
|
# try bom detection using 4 bytes, 3 bytes, or 2 bytes
|
|
bomDetection = bomDict.get((byte1, byte2, byte3, byte4))
|
|
if not bomDetection:
|
|
bomDetection = bomDict.get((byte1, byte2, byte3, None))
|
|
if not bomDetection:
|
|
bomDetection = bomDict.get((byte1, byte2, None, None))
|
|
# if BOM detected, we're done :-)
|
|
fp.seek(oldFP)
|
|
if bomDetection:
|
|
return bomDetection
|
|
encoding = 'latin-1'
|
|
# more character detecting magick using http://chardet.feedparser.org/
|
|
fp.seek(0)
|
|
rawdata = fp.read()
|
|
# if data can be decoded as utf-8 use that, try chardet otherwise
|
|
# chardet detects utf-8 as ISO-8859-2 most of the time
|
|
try:
|
|
rawdata.decode('utf-8')
|
|
encoding = 'utf-8'
|
|
except:
|
|
encoding = chardet.detect(rawdata)['encoding']
|
|
fp.seek(oldFP)
|
|
return encoding
|
|
|
|
|
|
def load(filename, offset=0):
|
|
'''Parses an srt file
|
|
|
|
filename: path to an srt file
|
|
offset (float, seconds): shift all in/out points by offset
|
|
|
|
Returns list with dicts that have in, out, value and id
|
|
'''
|
|
srt = []
|
|
with open(filename, 'rb') as f:
|
|
encoding = _detect_encoding(f)
|
|
data = f.read()
|
|
try:
|
|
data = data.decode(encoding)
|
|
except:
|
|
try:
|
|
data = data.decode('latin-1')
|
|
except:
|
|
print("failed to detect encoding, giving up")
|
|
return []
|
|
return loads(data, offset)
|
|
|
|
def loads(data, offset=0):
|
|
'''Parses an srt file
|
|
|
|
filename: path to an srt file
|
|
offset (float, seconds): shift all in/out points by offset
|
|
|
|
Returns list with dicts that have in, out, value and id
|
|
'''
|
|
srt = []
|
|
|
|
def parse_time(t):
|
|
return offset + ox.time2ms(t.replace(',', '.')) / 1000
|
|
|
|
data = data.replace('\r\n', '\n')
|
|
if not data.endswith('\n\n'):
|
|
data += '\n\n'
|
|
regexp = r'(\d\d:\d\d:\d\d[,.]\d\d\d)\s*?-->\s*?(\d\d:\d\d:\d\d[,.]\d\d\d).*?\n(.*?)\n\n'
|
|
srts = re.compile(regexp, re.DOTALL)
|
|
i = 0
|
|
for s in srts.findall(data):
|
|
_s = {
|
|
'id': str(i),
|
|
'in': parse_time(s[0]),
|
|
'out': parse_time(s[1]),
|
|
'value': s[2].strip()
|
|
}
|
|
srt.append(_s)
|
|
i += 1
|
|
return srt
|
|
|
|
|
|
def _srt_timecode(t):
|
|
return ox.format_duration(t * 1000, years=False).replace('.', ',')
|
|
|
|
|
|
def encode(data):
|
|
"""Encodes subtitles into SRT format
|
|
|
|
data: list of dicts with 'in', 'out': float and 'value': unicode
|
|
|
|
Returns: a UTF-8-encoded bytestring
|
|
|
|
>>> encode([{'in': 1.25, 'out': 60 * 60 + 1, 'value': u'touch\\u00E9'}])
|
|
'\\xef\\xbb\\xbf1\\r\\n00:00:01,250 --> 01:00:01,000\\r\\ntouch\\xc3\\xa9\\r\\n\\r\\n'
|
|
"""
|
|
|
|
srt = u''
|
|
|
|
for i, s in enumerate(data, 1):
|
|
srt += '%d\r\n%s --> %s\r\n%s\r\n\r\n' % (
|
|
i,
|
|
_srt_timecode(s['in']),
|
|
_srt_timecode(s['out']),
|
|
s['value'].replace('\n', '\r\n').strip()
|
|
)
|
|
|
|
return codecs.BOM_UTF8 + srt.encode('utf-8')
|