From ebe8783d8096680153d53b7dca4261dab069b242 Mon Sep 17 00:00:00 2001
From: Jon Bergli Heier <jonheier@start.no>
Date: Sat, 29 Sep 2007 19:45:57 +0200
Subject: Initial commit. Classes for script, info, styles and events with
 karaoke are implemented.

---
 pykfx.py | 174 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 174 insertions(+)
 create mode 100644 pykfx.py

diff --git a/pykfx.py b/pykfx.py
new file mode 100644
index 0000000..0f8d0a0
--- /dev/null
+++ b/pykfx.py
@@ -0,0 +1,174 @@
+import re
+
+class StyleException(Exception): pass
+class EventException(Exception): pass
+class ScriptException(Exception): pass
+
+class ScriptInfo:
+	def __init__(self, f = None):
+		self.info = {}
+		if f:
+			self.read(f)
+
+	def __getitem__(self, key):
+		try:
+			return self.info[key.lower()]
+		except ValueError:
+			raise KeyError
+
+	def read(self, f):
+		s = f.readline().strip()
+		while s:
+			if not s.startswith(';'):
+				k, v = s.split(': ', 1)
+				self.info[k.lower()] = v
+			s = f.readline().strip()
+
+class Style:
+	def __init__(self, format = None, s = None):
+		if format and s:
+			self.parse(format, s)
+
+	def parse(self,  format, s):
+		s = s.split(': ', 1)
+		if s[0] != 'Style':
+			raise StyleException('invalid style line')
+		s = s[1].split(',')
+		for k, v in zip(format, s):
+			setattr(self, k, v)
+
+class Styles:
+	def __init__(self, f = None):
+		self.format, self.styles = [], {}
+		if f:
+			self.read(f)
+
+	def __getitem__(self, key):
+		if self.styles.has_key(key.lower()):
+			return self.styles[key]
+		else:
+			raise KeyError('style "%s" not found' % key)
+
+	def read(self, f):
+		s = f.readline().strip()
+		s = s.split(': ', 1)
+		if s[0] != 'Format':
+			raise StyleException('format line not found')
+		self.format = [x.lower() for x in s[1].split(', ')]
+
+		s = f.readline().strip()
+		while s:
+			s = Style(self.format, s)
+			self.styles[s.name.lower()] = s
+			s = f.readline().split()
+
+class Syllable:
+	def __init__(self, start, end, text):
+		self.start, self.end, self.dur, self.text = start, end, end - start, text
+
+	def __str__(self):
+		return '{\\k%d}%s' % (self.dur / 10, self.text)
+
+class Event:
+	def __init__(self, format = None, s = None):
+		self.karaoke = []
+		if format and s:
+			self.parse(format, s)
+
+	def __getitem__(self, key):
+		if type(key) is int:
+			return self.karaoke[key]
+		else:
+			raise TypeError('key must be int')
+
+	def parse(self, format, s):
+		s = s.split(': ', 1)
+		self.kind = s[0].lower()
+		s = s[1].split(',')
+		for k, v in zip(format, s):
+			setattr(self, k, v)
+		if self.kind == 'dialogue' and self.text.find('\\k') > -1:
+			self.parse_karaoke()
+
+	def parse_karaoke(self):
+		s = self.text
+		i = 0
+		tot = 0
+		while i < len(s):
+			i = s.find('\\k', i)
+			# break if no more \k's (end-of-line-text is added at the end of the loop)
+			if i == -1:
+				break
+			i += 2
+			ms = ''
+			while s[i].isdigit():
+				ms += s[i]
+				i += 1
+			ms = int(ms) * 10
+			tot += ms
+			# unless next is another override, skip one char (past '}')
+			if s[i] != '\\':
+				i += 1
+			n = s.find('\\k', i)
+			if n > -1:
+				part = s[i:n-1] # get text up to next \k
+			else:
+				part = s[i:] # end of line
+
+			# go to next if part is empty
+			if not part.strip():
+				continue
+
+			self.karaoke.append(Syllable(tot - ms, tot, part))
+
+class Events:
+	def __init__(self, f = None):
+		self.format, self.events = [], []
+		if f:
+			self.read(f)
+
+	def __getitem__(self, key):
+		if type(key) is int:
+			return self.events[key]
+		else:
+			raise TypeError('key must be int')
+
+	def read(self, f):
+		s = f.readline().strip()
+		s = s.split(': ', 1)
+		if s[0] != 'Format':
+			raise EventException('format line not found')
+		self.format = [x.lower() for x in s[1].split(', ')]
+
+		s = f.readline().strip()
+		while s:
+			self.events.append(Event(self.format, s))
+			s = f.readline().strip()
+
+class Script:
+	def __init__(self, f = None):
+		if f:
+			self.read(f)
+
+	def read(self, f):
+		f = open(f, 'r')
+
+		s = f.readline().strip()
+		if s.startswith('\xef\xbb\xbf'):
+			s = s[3:]
+		if s == '[Script Info]':
+			self.info = ScriptInfo(f)
+		else:
+			raise ScriptException('script info not found')
+
+		s = f.readline().strip()
+		if re.match('\[V4\+? Styles\]', s):
+			self.styles = Styles(f)
+		else:
+			raise ScriptException('script styles not found')
+
+		s = f.readline().strip()
+		if s == '[Events]':
+			self.events = Events(f)
+		else:
+			raise ScriptException('script events not found')
-- 
cgit v1.2.3