Delaying the segment event to when caps are decided can cause issues as
the first thing katedec does on its chain function it doing a segment clip.
It will lead to an assertion if the segment format is undefined
https://bugzilla.gnome.org/show_bug.cgi?id=733226
Properly handle the caps event by configuring the kate decoding lib using the
available streamheaders. This makes it possible to decode kate subtitles when
the stream is seeked before katedec gets the initial buffers that are usually
the streamheaders.
https://bugzilla.gnome.org/show_bug.cgi?id=733226
Don't leak source caps. Use GST_PTR_FORMAT to log caps, so
we don't need to leak strings from gst_caps_to_string().
No need to use GST_DEBUG_FUNCPTR for vfuncs where the base
class will never look them up (like property getters/setters).
Don't use g_return_*_if_fail() for things that aren't directly
programming errors (by the application developer).
Fixes kate unit test under valgrind.
Don't escape special characters, as we'll send the buffer as
text/plain rather than text/x-pango-markup; this avoids e.g.
quotes from appearing as " in the rendered subtitles.
See bug #600929.
katedec: Kate decoder (text only)
kateenc: Kate encoder (text and DVD SPU only)
katetag: Kate tagger
kateparse: Kate parser
tiger: Kate renderer using the Tiger rendering library
Fixes#525743.
