[utils] add support for ttml styles
This commit is contained in:
parent
75a2485407
commit
5b995f713b
2 changed files with 152 additions and 9 deletions
|
@ -2511,27 +2511,97 @@ def srt_subtitles_timecode(seconds):
|
|||
|
||||
|
||||
def dfxp2srt(dfxp_data):
|
||||
LEGACY_NAMESPACES = (
|
||||
('http://www.w3.org/ns/ttml', [
|
||||
'http://www.w3.org/2004/11/ttaf1',
|
||||
'http://www.w3.org/2006/04/ttaf1',
|
||||
'http://www.w3.org/2006/10/ttaf1',
|
||||
]),
|
||||
('http://www.w3.org/ns/ttml#styling', [
|
||||
'http://www.w3.org/ns/ttml#style',
|
||||
]),
|
||||
)
|
||||
|
||||
SUPPORTED_STYLING = [
|
||||
'color',
|
||||
'fontFamily',
|
||||
'fontSize',
|
||||
'fontStyle',
|
||||
'fontWeight',
|
||||
'textDecoration'
|
||||
]
|
||||
|
||||
_x = functools.partial(xpath_with_ns, ns_map={
|
||||
'ttml': 'http://www.w3.org/ns/ttml',
|
||||
'ttaf1': 'http://www.w3.org/2006/10/ttaf1',
|
||||
'ttaf1_0604': 'http://www.w3.org/2006/04/ttaf1',
|
||||
'tts': 'http://www.w3.org/ns/ttml#styling',
|
||||
})
|
||||
|
||||
styles = {}
|
||||
default_style = {}
|
||||
|
||||
class TTMLPElementParser(object):
|
||||
out = ''
|
||||
_out = ''
|
||||
_unclosed_elements = []
|
||||
_applied_styles = []
|
||||
|
||||
def start(self, tag, attrib):
|
||||
if tag in (_x('ttml:br'), _x('ttaf1:br'), 'br'):
|
||||
self.out += '\n'
|
||||
if tag in (_x('ttml:br'), 'br'):
|
||||
self._out += '\n'
|
||||
else:
|
||||
unclosed_elements = []
|
||||
style = {}
|
||||
element_style_id = attrib.get('style')
|
||||
if default_style:
|
||||
style.update(default_style)
|
||||
if element_style_id:
|
||||
style.update(styles.get(element_style_id, {}))
|
||||
for prop in SUPPORTED_STYLING:
|
||||
prop_val = attrib.get(_x('tts:' + prop))
|
||||
if prop_val:
|
||||
style[prop] = prop_val
|
||||
if style:
|
||||
font = ''
|
||||
for k, v in sorted(style.items()):
|
||||
if self._applied_styles and self._applied_styles[-1].get(k) == v:
|
||||
continue
|
||||
if k == 'color':
|
||||
font += ' color="%s"' % v
|
||||
elif k == 'fontSize':
|
||||
font += ' size="%s"' % v
|
||||
elif k == 'fontFamily':
|
||||
font += ' face="%s"' % v
|
||||
elif k == 'fontWeight' and v == 'bold':
|
||||
self._out += '<b>'
|
||||
unclosed_elements.append('b')
|
||||
elif k == 'fontStyle' and v == 'italic':
|
||||
self._out += '<i>'
|
||||
unclosed_elements.append('i')
|
||||
elif k == 'textDecoration' and v == 'underline':
|
||||
self._out += '<u>'
|
||||
unclosed_elements.append('u')
|
||||
if font:
|
||||
self._out += '<font' + font + '>'
|
||||
unclosed_elements.append('font')
|
||||
applied_style = {}
|
||||
if self._applied_styles:
|
||||
applied_style.update(self._applied_styles[-1])
|
||||
applied_style.update(style)
|
||||
self._applied_styles.append(applied_style)
|
||||
self._unclosed_elements.append(unclosed_elements)
|
||||
|
||||
def end(self, tag):
|
||||
pass
|
||||
if tag not in (_x('ttml:br'), 'br'):
|
||||
unclosed_elements = self._unclosed_elements.pop()
|
||||
for element in reversed(unclosed_elements):
|
||||
self._out += '</%s>' % element
|
||||
if unclosed_elements and self._applied_styles:
|
||||
self._applied_styles.pop()
|
||||
|
||||
def data(self, data):
|
||||
self.out += data
|
||||
self._out += data
|
||||
|
||||
def close(self):
|
||||
return self.out.strip()
|
||||
return self._out.strip()
|
||||
|
||||
def parse_node(node):
|
||||
target = TTMLPElementParser()
|
||||
|
@ -2539,13 +2609,45 @@ def dfxp2srt(dfxp_data):
|
|||
parser.feed(xml.etree.ElementTree.tostring(node))
|
||||
return parser.close()
|
||||
|
||||
for k, v in LEGACY_NAMESPACES:
|
||||
for ns in v:
|
||||
dfxp_data = dfxp_data.replace(ns, k)
|
||||
|
||||
dfxp = compat_etree_fromstring(dfxp_data.encode('utf-8'))
|
||||
out = []
|
||||
paras = dfxp.findall(_x('.//ttml:p')) or dfxp.findall(_x('.//ttaf1:p')) or dfxp.findall(_x('.//ttaf1_0604:p')) or dfxp.findall('.//p')
|
||||
paras = dfxp.findall(_x('.//ttml:p')) or dfxp.findall('.//p')
|
||||
|
||||
if not paras:
|
||||
raise ValueError('Invalid dfxp/TTML subtitle')
|
||||
|
||||
repeat = False
|
||||
while True:
|
||||
for style in dfxp.findall(_x('.//ttml:style')):
|
||||
style_id = style.get('id')
|
||||
parent_style_id = style.get('style')
|
||||
if parent_style_id:
|
||||
if parent_style_id not in styles:
|
||||
repeat = True
|
||||
continue
|
||||
styles[style_id] = styles[parent_style_id].copy()
|
||||
for prop in SUPPORTED_STYLING:
|
||||
prop_val = style.get(_x('tts:' + prop))
|
||||
if prop_val:
|
||||
styles.setdefault(style_id, {})[prop] = prop_val
|
||||
if repeat:
|
||||
repeat = False
|
||||
else:
|
||||
break
|
||||
|
||||
for p in ('body', 'div'):
|
||||
ele = xpath_element(dfxp, [_x('.//ttml:' + p), './/' + p])
|
||||
if ele is None:
|
||||
continue
|
||||
style = styles.get(ele.get('style'))
|
||||
if not style:
|
||||
continue
|
||||
default_style.update(style)
|
||||
|
||||
for para, index in zip(paras, itertools.count(1)):
|
||||
begin_time = parse_dfxp_time_expr(para.attrib.get('begin'))
|
||||
end_time = parse_dfxp_time_expr(para.attrib.get('end'))
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue