107 lines
3.0 KiB
Python
107 lines
3.0 KiB
Python
# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
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from __future__ import with_statement, division, print_function
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import chardet
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import re
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import codecs
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import ox
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__all__ = []
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def _detect_encoding(fp):
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bomDict={ # bytepattern : name
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(0x00, 0x00, 0xFE, 0xFF): "utf_32_be",
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(0xFF, 0xFE, 0x00, 0x00): "utf_32_le",
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(0xFE, 0xFF, None, None): "utf_16_be",
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(0xFF, 0xFE, None, None): "utf_16_le",
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(0xEF, 0xBB, 0xBF, None): "utf_8",
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}
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# go to beginning of file and get the first 4 bytes
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oldFP = fp.tell()
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fp.seek(0)
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(byte1, byte2, byte3, byte4) = tuple(map(ord, fp.read(4)))
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# try bom detection using 4 bytes, 3 bytes, or 2 bytes
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bomDetection = bomDict.get((byte1, byte2, byte3, byte4))
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if not bomDetection:
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bomDetection = bomDict.get((byte1, byte2, byte3, None))
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if not bomDetection:
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bomDetection = bomDict.get((byte1, byte2, None, None))
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## if BOM detected, we're done :-)
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fp.seek(oldFP)
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if bomDetection:
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return bomDetection
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encoding = 'latin-1'
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#more character detecting magick using http://chardet.feedparser.org/
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fp.seek(0)
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rawdata = fp.read()
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#if data can be decoded as utf-8 use that, try chardet otherwise
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#chardet detects utf-8 as ISO-8859-2 most of the time
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try:
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data = unicode(rawdata, 'utf-8')
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encoding = 'utf-8'
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except:
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encoding = chardet.detect(rawdata)['encoding']
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fp.seek(oldFP)
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return encoding
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def load(filename, offset=0):
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'''
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filename path to an srt file
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offset in seconds shift all in/out points by offset
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returns list with objects that have in,out,value and id
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'''
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srt = []
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def parse_time(t):
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return offset + ox.time2ms(t.replace(',', '.')) / 1000
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with open(filename) as f:
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encoding = _detect_encoding(f)
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data = f.read()
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try:
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data = unicode(data, encoding)
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except:
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try:
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data = unicode(data, 'latin-1')
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except:
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print("failed to detect encoding, giving up")
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return srt
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data = data.replace('\r\n', '\n')
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srts = re.compile('(\d\d:\d\d:\d\d[,.]\d\d\d)\s*?-->\s*?(\d\d:\d\d:\d\d[,.]\d\d\d).*?\n(.*?)\n\n', re.DOTALL)
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i = 0
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for s in srts.findall(data):
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_s = {'id': str(i),
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'in': parse_time(s[0]),
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'out': parse_time(s[1]),
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'value': s[2].strip()
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}
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srt.append(_s)
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i += 1
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return srt
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def encode(data):
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'''
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encodes list of objects with in,out,value into srt
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result is utf-8 encoded bytestring
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'''
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srt = u''
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i = 1
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for s in data:
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srt += '%d\r\n%s --> %s\r\n%s\r\n\r\n' % (
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i,
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ox.format_duration(s['in']*1000, years=False).replace('.', ','),
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ox.format_duration(s['out']*1000, years=False).replace('.', ','),
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s['value'].replace('\n', '\r\n').strip()
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)
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i += 1
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return codecs.BOM_UTF8 + srt.encode('utf-8')
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