[pulseaudio-discuss] [PATCH] bluetooth-discover set rate/channels for HSP/A2DP, and bluetooth-device use correct S16_LE sample format for HSP devices

[Lennart Poettering]

On Fri, 26.12.08 13:42, Steve Jacobs (Steve.Jacobs at sparta.com) wrote:

> I recently ran into some very strange sounding audio when trying to use
> pulseaudio and bluez4 together with a bluetooth handsfree device. I
> noticed that doing a list-modules/list-sinks in pacmd showed that my
> handsfree SCO audio device was set to 2 channel 44.1khz audio, which is
> not correct. So I modified bluetooth-discover to set the information
> correctly for SCO/HFP devices.
> 
> I also noticed that the sample format was being set as Unsigned 8-bit,
> but all the documentation I can find for SCO audio specifies S16_LE as
> the appropriate sample format. So I changed bluetooth-device to support
> this change as well.
> 
> I am working on an embedded platform for most of my testing, and made
> these changes against the 0.9.13 tree. However these patches are against
> the current git master branch. 
> 
> This is my first time emailing in a patch, so please let me know if I
> need to do anything differently. As I comment in the first patch, I am
> not certain if setting 44.1khz is correct for A2DP devices in all cases.
> 
> Another observation I made, but did not address, is that if HFP mode is
> disabled in audio.conf for bluez4, bluez will never create a Headset
> device on DBUS, and the current bluetooth-discover module will not see
> it. So currently, in order to use a bluetooth handsfree device with
> pulse, you must have HFP mode enabled.
> 
> It is unclear to me who the current maintainer of the bluetooth plugin
> is, but I would be interested in assisting in whatever way I can to get
> bluetooth source support working.

A simpler fix has now been fixed in
r4460a5d5d5015b003c703f3e81c00ad0ed3ac838.

Luiz von Dentz (vudentz) mostly maintains that part.

Lennart

-- 
Lennart Poettering                        Red Hat, Inc.
lennart [at] poettering [dot] net         ICQ# 11060553
http://0pointer.net/lennart/           GnuPG 0x1A015CC4