Re: [Libyahoo2-users]voice in yahoo messenger ?

[Mik <th...@ya...>]

Well the yahoo website mentions that they use
TrueSpeech 8.5 which is a component that comes with
most Windows versions. It uses the GSM True Speech
codec (DSP Group TrueSpeech (TM) Audio DEC). This
would be tssoft32.acm. I've looked around but there
doesn't seem to be any opensource libraries which
support this format. Mplayer is however able to play
files in this format. They use part of the wine code
to decode it using the windows dll's. But I haven't
gotten into the details of how it exactly works and I
don't know if it's also possible to encode audio this
way.
About the protocol it uses so far I found out that it
uses a regular tcp connection to the main voice server
to find an available audio server. This is done in a
similar way with webcams. But ofcourse the packet
formats are totally different once again. After a
connection is built up it sends/receives the actual
audio data through UDP. That's about as far as I got.
But if you plan on implementing this I'm sure I can
help you out of maybe give you some more tips on how
to get it done. Well that will have to probably wait
since I'm going on holidays and won't be around for
the next 4 weeks.
Well anyways good luck on getting started.

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