Le 26/08/2011 10:54, Martin Hamant a écrit :
> Hi romain,
>
> Le 17/08/2011 02:11, Romain Beauxis a écrit :
>>> add_timeout + http.get + insert_metadata :-)
>>> Something like this:
>>>
>>> # A source
>>> s = (...)
>>>
>>> # Attach metadata insertion hooks
>>> x = insert_metadata(s)
>>> insert = fst(x)
>>> s = snd(x)
>>>
>>> # A reference to the latest metadata
>>> latest_meta = ref []
>>>
>>> # A function to update metadata
>>> def update_meta() =
>>> data = http.get(...)
>>> m = (..parse data here..)
>>> if m != !latest_meta then
>>> latest_meta := m
>>> insert_metadata(m)
>> Shut, sorry you should have read this for the previous line:
>> insert(m)
>>
>>> end
>>> # Restart in 10. seconds
>>> 10.
>>> end
>>>
>>> # Start polling now
>>> add_timeout(0., update_meta)
>>>
>>> I have not tested this code but I think it should be close to working
>>> and also close to what you describe :-
>
> Yes ! It's close to working but I have questions:
> I wrote this code:
>
> (...)
> s0 =
> if source_device == "pulse" then
> input.pulseaudio(client='#{stream_name}')
> else
> input.alsa(device="#{source_device}")
> end
>
> # Attach metadata insertion hooks
> x = insert_metadata(s0)
> insert = fst(x)
> s = snd(x)
>
> # A reference to the latest metadata
> latest_meta = ref []
>
> # A function to update metadata
> def update_meta() =
> data = http.get("http://myserver.com/titles";)
> # debug
> print(snd(data))
> m = snd(data)
> if m != !latest_meta then
> latest_meta := m
> insert(m)
> end
> # Restart in 10. seconds
> 10.
> end
>
> # Start polling now
> add_timeout(0., update_meta)
>
> Of course there is a type error at "if m != !latest_meta" , because I
> have a string vs a [] ...
> Then I understand that in insert(m), m should be a [], and that's why
> you wrote lastest_meta = ref []
>
> So, How do I convert my string m to something like [] ?
I was totally far from it.
Found the trick !
x = insert_metadata(s0)
insert = fst(x)
s = snd(x)
# A reference to the latest metadata
latest_meta = ref []
# A function to update metadata
def update_meta() =
data = http.get("bla/titles")
m = [("title", snd(data))] # <= this is the right type of m !!
if m != !latest_meta then
latest_meta := m
insert(m)
print("new metadata !")
end
# Restart in 10. seconds
10.
end
# Start polling now
add_timeout(0., update_meta)
:D
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