Linux Bluetooth HFP through usp pcm design questions

[Bin Shi]

On Wed, 2010-05-12 at 15:27 +0200, Eric Miao wrote:
> 2010/5/5 Bin Shi <Bin.Shi at csr.com>
> >
> > Hi all,
> >
> >
> > I am working on vendor ARM1136 platform. Nowdays, I want to integrate
> > CSR BC06 chip to my board with HFP profile, bluetooth chip connect its
> > pcm interface with platform's usp interface.
> >
> > As I know, HFP profile should has at least two deamons, one for host and
> > one for target(BC06). In low level, driver for usp pcm should be
> > available, which is compatible with BC06 frame format. Now, audio path
> > is OK for playback and capture with ALSA.
> >
> > My questions are:
> > 1) How could I control stream path: eg headphone voice->BC06->usp
> > interface->platform speaker?
> > 2) Should it be strictly sync for controlling this application?
> > 3) Data format between usp interface and headphone interface(bypass
> > bluetooth) should be pcm stream?
> >
> >
> > Any suggestion would be welcomed! Thanks.
> >
> 
> HFP works very well on the desktop Linux distro now. I suggest you
> to give Ubuntu a run and figure out how that works. You have a big
> question here.
> 
> Both ALSA and pulseaudio have bluetooth plugins.

HFP for Linux project in http://nohands.sourceforge.net/, which is for
Bluetooth Hands-Free profile server. Has any one try that already? 

> 
> PS: html format emails are generally not welcome, change it to plain
> text and it's far more readable for other people.
> 

Thanks for your advise.:)

> 
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