[Ambulant-users] Auto smil feed
Jack.Jansen at cwi.nl
Tue Aug 5 14:23:04 CEST 2008
On 1 aug 2008, at 03:18, CK Ho wrote:
> Hi Jack,
>> What about Ambulant supporting auto smil files feed format to a
>> certain folder and Ambulant will play FIFO?
> What do you mean by "Auto smil files feed"? Do you want Ambulant to
> watch a specified directory and play all files that show up in that
> YES. Exactly. May i know Ambulant able to support that or I need to
> do some modification.
Ambulant does not do this out-of-the-box.
There are three ways you could go about implementing this functionality:
- Do it in C++. Take the existing source code, and somewhere early
during startup fire off a new thread that watches a folder. The thread
will have to be notified when the current SMIL presentation ends
(easy, there's a callback for that) and open the next file.
- Do it in Python, as a main program. This has the advantage that in
Python it's probably easier (assuming you know Python, that is), but
it has the disadvantage that you may have to recreate the whole main
program logic. Hence, my personal preference would be
- Do it in Python, as a plugin. Even a plugin can "take over" the main
program behaviour, we have experience with this and it works fine. All
the Ambulant C++ APIs are accessible from Python. So, during plugin
load time you fire up a thread (same as in first example), and
whenever a document stops playing you start playing a new one.
Only problem with the last method is that you probably need the CVS
Ambulant sources. Python support in the 1.8 release is not good enough.
The good news is that once the next Ambulant release comes out you
won't even need to rebuild ambulant or anything: your plugin could be
pure Python code only, and it would drop into any Ambulant player. So
you could distribute it as an addon to Ambulant and become famous:-)
Jack Jansen, <Jack.Jansen at cwi.nl>, http://www.cwi.nl/~jack
If I can't dance I don't want to be part of your revolution -- Emma
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