Re: [Bluez-devel] Alsa plugin for A2DP daemon

[Fabien Chevalier <fabchevalier@free.fr>]

Terrific work !! :-)

Just a tip: maybe you could use UNIX sockets to remove TCP burden.

Cheers,

Fabien

> Hi all,
> =

>     I've been working with Brad's a2dp plugin for some time now. I =

> hacked it with the idea of having an ipc alsa plugin and an audio daemon =

> and guess what : today, I have something working pretty well. It fully =

> separate the application and the headset (tcp used for ipc). Thus, you =

> can let the application play audio while having the heaset switched off. =

> Switch on the headset and you will start hearing sound. It also permit =

> having lots of applications using the headset at a time and yes, sound =

> is mixed. You can crash and restart the daemon without interrupting the =

> app. Reverse is possible too.
>     Drawbacks : some ticks in the sound, Tcp may give additionnal burden =

> but for now it seems far from being cpu intensive (if you consider Xeon =

> as being a representative cpu ;).
> =

>     Brad, to do this, I only modified file Makefile.am and added new =

> source code files in the 'alsa-plugins' folder. It will setup next to =

> the original alsa-plugin. Is is called pcm_a2dpd.c. The archive also =

> contain a modified version of pcm_a2dp.c that receives connections on =

> the control socket.
> =

>     You can get a full archive there http://fdalleau.free.fr/btsco.tar.gz
>      I would love to have someone try it on an ARM platform. Next step =

> is volume control!
> =

>     Hope you like it! Documentation follow
> =

>     Fr=E9d=E9ric
> =

> =

> =

> =

> To build
> -----------
>     bootstrap && ./configure --enable-alsaplugin && make && sudo make =

> install
>     You may have to create a symbolic link as I had : sudo ln -s =

> /usr/local/lib/alsa-lib  /usr/lib/alsa-lib
> =

> =

> To run
> ----------
>     Your headset must be paired.
>     create .asoundrc if you do not have one that contain the following =

> (don't forget backup previous one)
> pcm.!default {
>         type a2dpd
>         bdaddr "00:11:22:33:44:55"
> }
> =

> pcm.a2dpd {
>         type a2dpd
>         bdaddr "00:11:22:33:44:55"
> }
>     This bluetooth address is needed but not used. Put something that =

> looks like a bluetooth address.
> =

>     restart alsa with : /etc/init.d/alsa-utils restart
> =

>     start your favorite media player configure it to play with alsa, and =

> press play!
> =

>     Oops, we forgot to start the daemon... No problem. Go in the =

> alsa-plugins subfolder of the archive and type : a2dpd AA:BB:CC:DD:EE:FF.
>     where AA:BB:CC:DD:EE:FF is the bluetooth address of your device. =

> Now, switch on your headset. Ctrl-C will quit the daemon.
> =

>     Try to keep with 16bits/stereo sounds!
> =

>     Remove the .asoundrc to restore your sound!
> =

> =

> =

> Using Tomcat but need to do more? Need to support web services, security?
> Get stuff done quickly with pre-integrated technology to make your job ea=
sier
> Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
> http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D120709&bid=3D263057&dat=
=3D121642
> _______________________________________________
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> =

> =




-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easi=
er
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=3Dlnk&kid=3D120709&bid=3D263057&dat=3D1=
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