[Telepathy] telepathy: problem fro accessing stream-engine

[Matthieu LAURENT]

I did nit get any answer to my last email (see below).
Can someone help me please?
regards
Matthieu

>> I have success in making the telepathy client "tp_caller" (from project
>> telepathy-sofiasip) working.
>>
>> I can see that interface
>> org.freedesktop.Telepathy.ChannelHandler, methode HandleChannel
>> of the stream-engine is accessed by the function tp_ch_handle_channel()
>> of the libtelepathy library
>>
>> I don't see any binding in libtelepathy in order to access interface
>> org.freedesktop.Telepathy.StreamEngine, method SetOutputVolume for example
>>
>> Could you tell me how to add this functionality in libtelepathy, and how
>> to call it from the telepathy client tp_caller, in oder to access
>> directly to the whole interface of the stream-engine (or if there is a
>> simplest way to access this function SetOutputVolume)?
>>
>> thanks for your help
>>
>> Matthieu