[Bluez-devel] A few questions about bluetooth-alsa project

Rogue

author

2007-07-02 20:33 UTC #0 lore raw

Hi All,

I am new to this list. I was looking at options of connecting my Bluetooth headset to my laptop running Fedora 7, and came across this site.

So first up, I have built sample spec files that generate rpm files out of sbc and plugz. In case you are interested then I can share them with you all.

Now, I have installed both plugz and sbc. I am trying to use sco for doing the two-way communication. I have copied over the plugz/alsa-plugins/asound.conf (as ~/.asoundrc) and changed the BT address to my headset's.

I ran the headset daemon and I noticed that my gnome-volume applet looks different and shows a new control called PCM-2. But beyond this I am unable to do much.

I also noticed that the website states that I need kernel patches. Is this still true for kernels > 2.6.21 ??

I would really appreciate it if people could help me out with figuring out this headset integration.

thanks,
Rogue

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Brad Midgley

2007-07-03 01:58 UTC #1 lore raw

hey

So first up, I have built sample spec files that generate rpm files out

Quoted 2 lines

of sbc and plugz. In case you are interested then I can share them with you all.

sure... I could put them in contrib/

Now, I have installed both plugz and sbc. I am trying to use sco for

Quoted 7 lines

doing the two-way communication. I have copied over the plugz/alsa-plugins/asound.conf (as ~/.asoundrc) and changed the BT address to my headset's.
I ran the headset daemon and I noticed that my gnome-volume applet looks different and shows a new control called PCM-2. But beyond this I am unable to do much.

most apps don't know about the plugin and you have to manually type in "headset" for the alsa device. if the app doesn't let you type in the name, you could make it the default device or hand-edit the config file.

I also noticed that the website states that I need kernel patches. Is

Quoted 1 line

this still true for kernels > 2.6.21 ??

I have not seen the flowcontrol patch land upstream.

I would really appreciate it if people could help me out with figuring

Quoted 1 line

out this headset integration.

you know this is a sort of testbed for this stuff. Marcel is allowing the parts of the design that aren't broken to be rewritten into the bluez utils audio service.

brad

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Marcel Holtmann

maintainer

2007-07-03 03:31 UTC #2 lore raw

Hi Brad,

Quoted 7 lines

So first up, I have built sample spec files that generate rpm files out
of sbc and plugz. In case you are interested then I can share them with
you all.
sure... I could put them in contrib/

please do me a favor and stop using HTML email on the BlueZ mailing list. It is bad enough that some people have no choice, but as one of the core developers you should set a good example and not encourage others with crappy HTML email.

Regards

Marcel

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Rogue

author

2007-07-03 15:55 UTC #3 lore raw

In reply to Brad Midgley

Quoted 11 lines · Brad Midgley

hey
So first up, I have built sample spec files that generate rpm files out
of sbc and plugz. In case you are interested then I can share them with
you all.
sure... I could put them in contrib/

Do you want me to send them directly to you?

Secondly, if I build an rpm of plugz, i see that the following files are being generated:

plugz                     /etc/dbus-1/system.d/a2dpd.conf
plugz                     /usr/bin/a2dpd
plugz                     /usr/bin/a2dpd_ctl
plugz                     /usr/bin/headsetd
plugz                     /usr/lib/alsa-lib/libasound_module_ctl_sco.a
plugz                     /usr/lib/alsa-lib/libasound_module_ctl_sco.la
plugz                     /usr/lib/alsa-lib/libasound_module_ctl_sco.so
plugz                     /usr/lib/alsa-lib/libasound_module_ctl_sco.so.0
plugz                     
/usr/lib/alsa-lib/libasound_module_ctl_sco.so.0.0.0
plugz                     /usr/lib/alsa-lib/libasound_module_pcm_a2dpd.a
plugz                     /usr/lib/alsa-lib/libasound_module_pcm_a2dpd.la
plugz                     /usr/lib/alsa-lib/libasound_module_pcm_a2dpd.so
plugz                     /usr/lib/alsa-lib/libasound_module_pcm_a2dpd.so.0
plugz                     
/usr/lib/alsa-lib/libasound_module_pcm_a2dpd.so.0.0.0
plugz                     /usr/lib/alsa-lib/libasound_module_pcm_sco.a
plugz                     /usr/lib/alsa-lib/libasound_module_pcm_sco.la
plugz                     /usr/lib/alsa-lib/libasound_module_pcm_sco.so
plugz                     /usr/lib/alsa-lib/libasound_module_pcm_sco.so.0
plugz                     
/usr/lib/alsa-lib/libasound_module_pcm_sco.so.0.0.0
plugz                     /usr/lib/liba2dpdcommon.a
plugz                     /usr/lib/liba2dpdcommon.la
plugz                     /usr/lib/liba2dpdcommon.so
plugz                     /usr/lib/liba2dpdcommon.so.0
plugz                     /usr/lib/liba2dpdcommon.so.0.0.0

plugz /usr/share/dbus-1/services/com.access.a2dpd.service

I see that there are some alsa-lib modules being built. So, do I still need to specify a custom asoundrc file? Wouldn't the device show up automatically in the applet's preferences?

I am sorry if these are ignorant questions, but I am trying to learn what I can about this package. Regarding the work that Marcel is doing for bluez utils audio service, is there a project / development package that I can play around with?

thanks,
Rogue

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Frederic Dalleau

2007-07-03 16:40 UTC #4 lore raw

Hi Rogue,

Quoted 4 lines

I see that there are some alsa-lib modules being built. So, do I still need to specify a custom asoundrc file? Wouldn't the device show up automatically in the applet's preferences?

As far as I know, the device won't show up whether there is an .asoundrc or not.
However, when the softvol plugin is declared in .asoundrc, it appears in the mixer. So I suspect there is a way to make the plugin appears in the players. I have never looked after that for now.

At least the entry must be declared in .asoundrc or /usr/share/alsa/alsa.conf. I just found a utility called asoundconf. This may be funny to try.

Hope this helps.

Frederic

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Frederic Dalleau

2007-07-03 16:56 UTC #5 lore raw

Just one line more,

Quoted 3 lines

However, when the softvol plugin is declared in .asoundrc, it appears in the mixer.

Wouldn't this explain the PCM-2device you saw in gnome-xxx?

Frederic

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Rogue

author

2007-07-11 20:14 UTC #6 lore raw

Hi Frederic,

Quoted 9 lines · Frederic Dalleau

Just one line more,
Quoted 4 lines
However, when the softvol plugin is declared in .asoundrc, it appears in the mixer.
Wouldn't this explain the PCM-2device you saw in gnome-xxx?

Sorry for the late response. Thunderbird had moved this message to the junk folder. Yes, the PCM-2 device in the applet was due to the .asoundrc file. Once I removed the file everything was back to normal. Ideally I would have expected the new devices mentioned in the file to get appended to the available set, but I guess I need to spend some more time understanding how the alsa-sound architecture works and how does it treat the asoundrc file.

later,
Rogue

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Brad Midgley

2007-07-03 18:14 UTC #7 lore raw

In reply to Rogue

hey

Quoted 3 lines

Quoted 2 lines
sure... I could put them in contrib/
Do you want me to send them directly to you?

ok

Quoted 3 lines

I see that there are some alsa-lib modules being built. So, do I still need to specify a custom asoundrc file? Wouldn't the device show up automatically in the applet's preferences?

I don't make the rules--I only complain about them. You might think that the device would show up, but alsa has two apis for listing
devices: hardware only and hardware and plugins. No one uses the latter so even when you do everything right, the alsa clients don't know the device is there. you have to type in the name (some apps won't let you do that). You won't escape creating the asoundrc.

The ray of hope here is that we want to get the bluez version to behave well enough that it can be set as the default device, so no one has to worry about what device is selected any more.

the bluez wiki discusses the bluez utils version
http://wiki.bluez.org/wiki/Audio
http://wiki.bluez.org/wiki/HOWTO/AudioDevices

brad
brought to you in non-html :)

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