[pulseaudio-discuss] Fade-In/Fade-Out Effect

[Yogesh Sharma]

Thanks Arun. 
Any pointers for implementing fades effect in a small program, need not
to be a generic solution.

Regards
Yogesh

> 
> ______________________________________________________________________
From: pulseaudio-discuss-bounces
+yogesh.sharma5=wipro.com at lists.freedesktop.org on behalf of Arun
Raghavan
Sent: Mon 10/17/2011 7:47 PM
To: General PulseAudio Discussion
Cc: securitycheck at denso.co.jp
Subject: Re: [pulseaudio-discuss] Fade-In/Fade-Out Effect


On Mon, 2011-10-17 at 17:46 +0900, Yogesh Sharma wrote:
> Hello All
>        
> How to get Fade-in/Fade-out effect using pulseaudio APIs.
> As Arun says in Article
> http://arunraghavan.net/2011/05/more-pulseaudio-power-goodness/
> "PulseAudio doesn’t offer an API to do fades" , is there any way to
get
> fade effects in pulseaduio.
> 
My blog post talks about doing fades on a GStreamer pipeline for the
generic case. You should still be able to implement your own fades
without too large an effort if you're not trying to build a generic
framework out of it.
> 
If you do want to do a generic thing, we really need the proper
API/infrastructure to implement effects and this is somewhat
non-trivial.
> 
> And if pulseaudio does not support fade effect then what are these
APIs
> meant for pa_cvolume_get_fade(), pa_cvolume_set_fade() and
> pa_cvolume_get_fade().
> I tried to use these APIs but did not get any success.
> 
As you'll find in the documentation, in this context, the fade is the
balance between front and rear channels:
> 
http://freedesktop.org/software/pulseaudio/doxygen/volume_8h.html#aaf78aa9297c11860338ffa3c958f9a36
> 
-- Arun
> 
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