Re: Low latency efforts

Hi Nick,

I am very sorry for the delay, I am stuck in a heap of work
.
Currently, the alsa datasource has been committed (I think
you noticed
that) but the device used is fixed statically. If you feel
it would be
efficient for you, I can add the device number and subnumber
in the
sip-communicator.xml file, the same way you select the alsa
datasource.
For a more elegant way to choose (or guess automatically)
the device, it
will take a little longer, although it is in my top SC
priorities.

What do you think ?

Jean

buzz lightyear wrote:
> Hi Jean
> 
> Do you have any very approximate idea when you think
you will have the
> alsa device registry implemented? Each time I restart
sip-communicator
> the device settings keep getting switched around and I
always have to
> play around with alsa before I get the correct headset
selected
> 
> Cheers
> 
> Nick
> 
> 
>> From: Jean Lorchat <lorchatsfc.wide.ad.jp>
>> Reply-To: devsip-communicator.dev.java.net
>> To: devsip-communicator.dev.java.net
>> Subject: Re: [sip-comm-dev] Low latency efforts
>> Date: Mon, 12 Mar 2007 20:15:44 +0900
>>
>> Hi Nick,
>>
>> This is definitely planned. Currently, the capture
happens on the very
>> first device (that is hw:0.0 from alsa point of
view). But I plan to
>> support all ALSA device registered.
>>
>> Ideally, you could choose which one to use in the
settings menu,
>> although we also plan to support some kind of
"smart" default choice for
>> non-expert users. I don't know about Bluetooth
audio devices status
>> exactly, but USB will definitely work (I tested it
already with my usb
>> quikcam). If BT audio devices register an ALSA
audio device then it will
>> also work. If you have such equipment, it will be
nice to have feedback
>> from you when device settings is implemented.
>>
>> Cheers,
>> Jean
>>
>> buzz lightyear wrote:
>> > Hi Jean
>> >
>> > Just a question relating to the alsa subsystem
- I run on linux and
>> when
>> > you do a jmf detection for capture devices,
all I get is 'JavaSound
>> > audio capture'. If I run the Ekiga softphone,
for instance, I get a
>> > choice of usb and bluetooth devices for both
audio and video.
>> >
>> > Do you think that you might eventually also
add support for device
>> > detection to your jmf_alsa library?
>> >
>> > Cheers
>> > Nick
>> >
>> >
>> >> From: Jean Lorchat <lorchatsfc.wide.ad.jp>
>> >> Reply-To: devsip-communicator.dev.java.net
>> >> To: devsip-communicator.dev.java.net
>> >> Subject: [sip-comm-dev] Low latency
efforts
>> >> Date: Mon, 12 Mar 2007 11:07:32 +0900
>> >>
>> >> Hi guys,
>> >>
>> >> I commited the java-part of the code for
the new ALSA-based
>> datasource.
>> >> It is mostly a wrapper to libjmf_alsa.so
that I also committed in
>> >> lib/native/linux and does direct
input/output with the alsa subsystem.
>> >>
>> >> The main point in this datasource is that
we are able to capture data
>> >> chunks of 10ms length, shrinking the
capture latency overhead to only
>> >> 10ms ! In addition, downsampling is
handled very efficiently by the
>> ALSA
>> >> library, and no more by JMF. Which means
that we are taking
>> advantage of
>> >> the extremely optimized ALSA code.
>> >>
>> >> The C code will be commited later, in
src/native/linux/libjmf_alsa/ if
>> >> some people agree that it is a good place
to put it. By the way, the
>> >> target library name is libjmf_alsa.so
hence the name.
>> >>
>> >> There are still many things to be done on
this front, from enumeration
>> >> and GUI configuration to real latency
tests. If someone feels like
>> >> measuring latency using the new datasource
and the legacy JMF
>> >> datasource, we can discuss plans and so
on.
>> >>
>> >> Cheers,
>> >>
>> >> Jean
>> >>
>> >>
------------------------------------------------------------
---------
>> >> To unsubscribe, e-mail:
dev-unsubscribesip-communicator.dev.java.net
>> >> For additional commands, e-mail:
>> dev-helpsip-communicator.dev.java.net
>> >>
>> >
>> >
____________________________________________________________
_____
>> > Match.com - Click Here To Find Singles In Your
Area Today!
>> > http://msnuk.match.com/
>> >
>> >
------------------------------------------------------------
---------
>> > To unsubscribe, e-mail: dev-unsubscribesip-communicator.dev.java.net
>> > For additional commands, e-mail: dev-helpsip-communicator.dev.java.net
>>
>>
------------------------------------------------------------
---------
>> To unsubscribe, e-mail: dev-unsubscribesip-communicator.dev.java.net
>> For additional commands, e-mail: dev-helpsip-communicator.dev.java.net
>>
> 
>
____________________________________________________________
_____
> The next generation of Hotmail is here! http://www.newhotmail.co.
uk
> 
>
------------------------------------------------------------
---------
> To unsubscribe, e-mail: dev-unsubscribesip-communicator.dev.java.net
> For additional commands, e-mail: dev-helpsip-communicator.dev.java.net

------------------------------------------------------------
---------
To unsubscribe, e-mail: dev-unsubscribesip-communicator.dev.java.net
For additional commands, e-mail: dev-helpsip-communicator.dev.java.net

Hi Jean

Thanks for getting back. Any little improvement in device
selection is very 
gratefully welcome.

On the other hand, what I really need this for is for
different work 
situations - sometimes I'm in front of the pc making calls
with a headset in 
a busy room - when the call rings it needs to ring on the
headset -- other 
times when I'm away from the pc it needs to ring on the
speakers. Etc.

Guess the best thing is to wait until you have time.

Very grateful for your input

Cheers
Nick


>From: Jean Lorchat <lorchatsfc.wide.ad.jp>
>Reply-To: devsip-communicator.dev.java.net
>To: devsip-communicator.dev.java.net
>Subject: Re: [sip-comm-dev] Low latency efforts
>Date: Wed, 09 May 2007 07:14:33 +0900
>
>Hi Nick,
>
>I am very sorry for the delay, I am stuck in a heap of
work .
>Currently, the alsa datasource has been committed (I
think you noticed
>that) but the device used is fixed statically. If you
feel it would be
>efficient for you, I can add the device number and
subnumber in the
>sip-communicator.xml file, the same way you select the
alsa datasource.
>For a more elegant way to choose (or guess
automatically) the device, it
>will take a little longer, although it is in my top SC
priorities.
>
>What do you think ?
>
>Jean
>
>buzz lightyear wrote:
> > Hi Jean
> >
> > Do you have any very approximate idea when you
think you will have the
> > alsa device registry implemented? Each time I
restart sip-communicator
> > the device settings keep getting switched around
and I always have to
> > play around with alsa before I get the correct
headset selected
> >
> > Cheers
> >
> > Nick
> >
> >
> >> From: Jean Lorchat <lorchatsfc.wide.ad.jp>
> >> Reply-To: devsip-communicator.dev.java.net
> >> To: devsip-communicator.dev.java.net
> >> Subject: Re: [sip-comm-dev] Low latency
efforts
> >> Date: Mon, 12 Mar 2007 20:15:44 +0900
> >>
> >> Hi Nick,
> >>
> >> This is definitely planned. Currently, the
capture happens on the very
> >> first device (that is hw:0.0 from alsa point
of view). But I plan to
> >> support all ALSA device registered.
> >>
> >> Ideally, you could choose which one to use in
the settings menu,
> >> although we also plan to support some kind of
"smart" default choice 
>for
> >> non-expert users. I don't know about Bluetooth
audio devices status
> >> exactly, but USB will definitely work (I
tested it already with my usb
> >> quikcam). If BT audio devices register an ALSA
audio device then it 
>will
> >> also work. If you have such equipment, it will
be nice to have feedback
> >> from you when device settings is implemented.
> >>
> >> Cheers,
> >> Jean
> >>
> >> buzz lightyear wrote:
> >> > Hi Jean
> >> >
> >> > Just a question relating to the alsa
subsystem - I run on linux and
> >> when
> >> > you do a jmf detection for capture
devices, all I get is 'JavaSound
> >> > audio capture'. If I run the Ekiga
softphone, for instance, I get a
> >> > choice of usb and bluetooth devices for
both audio and video.
> >> >
> >> > Do you think that you might eventually
also add support for device
> >> > detection to your jmf_alsa library?
> >> >
> >> > Cheers
> >> > Nick
> >> >
> >> >
> >> >> From: Jean Lorchat <lorchatsfc.wide.ad.jp>
> >> >> Reply-To: devsip-communicator.dev.java.net
> >> >> To: devsip-communicator.dev.java.net
> >> >> Subject: [sip-comm-dev] Low latency
efforts
> >> >> Date: Mon, 12 Mar 2007 11:07:32
+0900
> >> >>
> >> >> Hi guys,
> >> >>
> >> >> I commited the java-part of the code
for the new ALSA-based
> >> datasource.
> >> >> It is mostly a wrapper to
libjmf_alsa.so that I also committed in
> >> >> lib/native/linux and does direct
input/output with the alsa 
>subsystem.
> >> >>
> >> >> The main point in this datasource is
that we are able to capture 
>data
> >> >> chunks of 10ms length, shrinking the
capture latency overhead to 
>only
> >> >> 10ms ! In addition, downsampling is
handled very efficiently by the
> >> ALSA
> >> >> library, and no more by JMF. Which
means that we are taking
> >> advantage of
> >> >> the extremely optimized ALSA code.
> >> >>
> >> >> The C code will be commited later, in
src/native/linux/libjmf_alsa/ 
>if
> >> >> some people agree that it is a good
place to put it. By the way, the
> >> >> target library name is libjmf_alsa.so
hence the name.
> >> >>
> >> >> There are still many things to be
done on this front, from 
>enumeration
> >> >> and GUI configuration to real latency
tests. If someone feels like
> >> >> measuring latency using the new
datasource and the legacy JMF
> >> >> datasource, we can discuss plans and
so on.
> >> >>
> >> >> Cheers,
> >> >>
> >> >> Jean
> >> >>
> >> >> 
>--------------------------------------------------------
-------------
> >> >> To unsubscribe, e-mail: 
>dev-unsubscribesip-communicator.dev.java.net
> >> >> For additional commands, e-mail:
> >> dev-helpsip-communicator.dev.java.net
> >> >>
> >> >
> >> >
____________________________________________________________
_____
> >> > Match.com - Click Here To Find Singles In
Your Area Today!
> >> > http://msnuk.match.com/
> >> >
> >> >
------------------------------------------------------------
---------
> >> > To unsubscribe, e-mail:
dev-unsubscribesip-communicator.dev.java.net
> >> > For additional commands, e-mail: 
>dev-helpsip-communicator.dev.java.net
> >>
> >>
------------------------------------------------------------
---------
> >> To unsubscribe, e-mail: dev-unsubscribesip-communicator.dev.java.net
> >> For additional commands, e-mail: dev-helpsip-communicator.dev.java.net
> >>
> >
> >
____________________________________________________________
_____
> > The next generation of Hotmail is here! http://www.newhotmail.co.
uk
> >
> >
------------------------------------------------------------
---------
> > To unsubscribe, e-mail: dev-unsubscribesip-communicator.dev.java.net
> > For additional commands, e-mail: dev-helpsip-communicator.dev.java.net
>
>--------------------------------------------------------
-------------
>To unsubscribe, e-mail: dev-unsubscribesip-communicator.dev.java.net
>For additional commands, e-mail: dev-helpsip-communicator.dev.java.net
>

____________________________________________________________
_____
Txt a lot? Get Messenger FREE on your mobile. 
https://live
messenger.mobile.uk.msn.com/

------------------------------------------------------------
---------
To unsubscribe, e-mail: dev-unsubscribesip-communicator.dev.java.net
For additional commands, e-mail: dev-helpsip-communicator.dev.java.net