[Iaxclient-devel] something I stumbled on...

[Steve K. <st...@st...>]

While researching MacOSX audio stuff, I stumbled on this library:

http://www.portaudio.com/

It seems like a nice small audio abstraction library, which _might_ be
appropriate to use for iaxclient.

On linux, the static library from this is just 16k (stripped, with debug
info it's 146k), which seems more than reasonable.

It seems to have a BSD-like license (only clause is that the copyright
needs to be kept, which I think is OK for LGPL).

Some quick tests of their v18 release and a CVS snapshot showed:

1) The CVS snapshot crashed (after doing what it was supposed to; gdb
shows some thread problem).
2) The v18 release didn't support sample rate conversion (my USB
headset, currently running with OSS drivers on RH9 only supports 48khz
out, and the test wanted 44.1, and the library didn't convert).
3) The CVS snapshot has better makefiles.

But it seems to have a pretty simple API, and perhaps the v19 release is
coming along well.

If we do what we've planned, we can include an "audio_portaudio" driver
for iaxclient, and only use that if we want to, but i'm thinking that it
might be useful on all platforms, if it supports the audio things we
need to do (i.e. we might need to scan for devices, choose devices,
start/stop them, etc).

-SteveK





-- 
  Steve Kann - Chief Engineer - 520 8th Ave #2300 NY 10018 -  (212) 533-1775
                HorizonLive.com - collaborate . interact . learn
   "The box said 'Requires Windows 95, NT, or better,' so I installed Linux."