Brian Furey wrote:
Hi James,
Im asking you becuae looking thru the archives you asked a similar
question a long time ago.
i'm using an open source VoIP application with the
alsa driver. My card is the onboard intel8x0.
My problem is figuring out the patterns I am
getting with the alsa driver when transmitting
packets.
For instance when I use the GSM codec with a packets
size of 80 msecs and 132 bytes, packets are
transmitted at alternate intervals of 64/96 msecs.
When i use G.711 packets of 240 bytes are transmitted
every 32 msecs with an extra packet every 15 pkts.
With G.711 it is obvious that 256 bytes are added to driver sending
buffer every 32 msecs.However this does not match for GSM because it
needs only 132 bytes every 64/96 msecs.
Can the driver change the amount of data it gets from the soundcard to
suit the codec?
Help appreciated,
Brian.
Can you point me to a url for the source?
I think I will understand you a bit better if I see the source code.
Cheers
James
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