[Freeswitch-users] Portaudio Improvements

Fri Jan 28 19:34:40 MSK 2011

It would have been best to share it all along and let it be in contrib
to get testers and contributors.  There are many developers here who
can give guidance etc.  That's why we do this in open source.

On Fri, Jan 28, 2011 at 8:30 AM, Paulo Vicentini <vizentini at hotmail.com> wrote:
> Hi
> Code is quite experimental but I intend to release it asap (probably within
> a few weeks)
> Let's see how it goes
> Regards
> Paulo
> ________________________________
> Date: Fri, 28 Jan 2011 08:48:51 -0500
> From: vipkilla at gmail.com
> To: freeswitch-users at lists.freeswitch.org
> Subject: Re: [Freeswitch-users] Portaudio Improvements
>
> It would be very cool to be able to send audio to portaudio from another
> program using something like PulseAudio. For instance I am running a
> freeswitch box with no soundcard but i want to be able to send audio from a
> program such as MPD to freeswitch. Could something like this be possible in
> PA2?
>
> 2011/1/28 João Mesquita <jmesquita at freeswitch.org>
>
> Paulo,
> What is the current status of PA with non-blocking I/O? A little while ago
> it was not moving forward and pablio was the only way out of it. What are
> your plans? Maybe some of us can help?
> Regards,
> João Mesquita
>
>
> On Fri, Jan 28, 2011 at 9:54 AM, Tamas Jalsovszky <jalsot at gmail.com> wrote:
>
> Wow, I didn't even know that somebody is working on PA2.
> Paulo, could you share some more information about that module? Why would
> somebody use it instead of the current one? Advantages/disadvantages?
> Is the source code available somewhere? Do you have a roadmap for the
> module? :)
>
> Regards,
>   Tamas
>
> On Fri, Jan 28, 2011 at 12:51 PM, Paulo Vicentini <vizentini at hotmail.com>
> wrote:
>
> Hi
> You can try PortMixer for volume control that is intended to work along with
> PortAudio
> I am developing/testing "mod_portaudio2" that does not rely on pablio, maybe
> things will be better with this approach
>
> Paulo
> ________________________________
> From: mitch.capper at gmail.com
> Date: Sat, 22 Jan 2011 21:05:22 -0800
> To: freeswitch-users at lists.freeswitch.org
> Subject: Re: [Freeswitch-users] Portaudio Improvements
>
> Ah well viewing volume levels had not been something I had looked into.  It
> wouldn't be too hard but the question is how do you constantly report that
> (FS event every second? every half second? port audio commands to return
> that value frequently?).  If your client is windows however again the native
> windows volume handler for apps does also keep track of their current
> output.
>
> ~Mitch
>
> On Sat, Jan 22, 2011 at 5:26 PM, Seven Du <dujinfang at gmail.com> wrote:
>
> Thanks Mitch, I actually had tried the equivalent uuid_audio and looks
> like it's the only way to do it for now. We had wanted to get energy
> levels dynamically to show a live indication but we given up that
> feature.
>
>
> On Sun, Jan 23, 2011 at 2:52 AM, Mitch Capper <mitch.capper at gmail.com>
> wrote:
>> It is true PA lacks volume control, it had been something I was debating.
>> Adding gain is pretty simple as you are for the most part just multiplying
>> up the samples I believe so would not be a major item to add to portaudio,
>> I
>> however decided not to go this route for two reasons.  1) In Windows each
>> application has its own volume setting (Vista and higher),  and apps are
>> starting to tie into this than internal volume controls.  The downside is
>> it
>> doesn't distort audio/have a gain option.   This is when I thought about
>> allowing for a fixed gain amount added to portaudio.  2) Freeswitch
>> actually
>> has its own built in volume control settings with set_audio_level.
>> set_audio_level allows for 9 settings (4 lower 4 higher) and seems to do a
>> good job at digital volume control.
>> Avoiding modifying the audio stream itself could also result in less
>> distortion when using actual volume controls (headsets, etc).
>>
>> So if you want volume control I would say take a look at set_audio_level
>> as
>> it may be the simplest method.   Adding it to portaudio would work but one
>> of the nice advantages of set_audio_level is the fact you can also do it
>> per
>> channel rather than globally:)
>>
>> ~Mitch
>>
>> On Fri, Jan 21, 2011 at 5:44 PM, Seven Du <dujinfang at gmail.com> wrote:
>>>
>>> In addition to AEC. I also found PA lacks the ability to change the
>>> sound device volume. I tried to control sound devices in QT but
>>> haven't find a way. Ideas on this?
>>
>>
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>
>
>
> --
> About: http://about.me/dujinfang
> Blog: http://www.dujinfang.com
> Proj:  http://www.freeswitch.org.cn
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