[Sugar-devel] Fwd: Running "pulseaudio" and "alsa" together.

[Ajay Garg]

FYI.

Will be helpful for any help in this regard.


Regards,
Ajay

---------- Forwarded message ----------
From: Ajay Garg <ajay at activitycentral.com>
Date: Sat, Jun 2, 2012 at 6:32 PM
Subject: Running "pulseaudio" and "alsa" together.
To: pulseaudio-discuss-request at lists.freedesktop.org,
alsa-user at lists.sourceforge.net, Discussion of the development of and with
GStreamer <gstreamer-devel at lists.freedesktop.org>


Hi all.

I have been banging my head for over 5 days now; went through whatever
google-literature I could possibly through.
But I guess I will have to ask the experts :|


I will list down my queries with the story regarding that query, so as to
maintain modularity as far as possible.


I have a x86-based Fedora-14 Dell laptop; and a XO-1.


A)
On my Dell laptop, the following work seamlessly, and I am able to enjoy
the mp3.

(i)    gst-launch filesrc location=/path/to/mp3 ! mad ! alsasink

(ii)   gst-launch filesrc location=/path/to/mp3 ! mad ! pulsesink


However, on my XO-1, only the following works ::


(i)    gst-launch filesrc location=/path/to/mp3 ! mad ! alsasink

whereas the following shows the "pulsesink" plugin not found error ::

(ii)   gst-launch filesrc location=/path/to/mp3 ! mad ! pulsesink


I figured out that the package "gstreamer-plugins-good" is required for the
"pulsesink" plugin.

So, I did "gst-inspect" on both machines, and "rpm -qa | grep
gstreamer-plugins-good" on both the machines.

To my horror, I saw that the package
"gstreamer-plugins-good-0.10.26-1.fc14.i686" was installed on both the Dell
machine, and the XO-1, but only the Dell laptop showed the presence of
"pulsesink".

Why could this difference be ?






B)
Anyhow, I copied "libgstpulse.so" from my Dell machine to the XO-1.
Thereafter, "pulsesink" could be recognised on the XO-1.

However, "gst-launch filesrc location=/path/to/mp3 ! mad ! pulsesink"
resulted in a sound only on Dell, and  not XO-1.

So, I researched further, and concluded that I needed to install
"alsa-plugins-pulseaudio" on the XO-1, so as to set up the pulseaudio
server, and have the alsa-device as the "other end of the pulseaudio proxy".

So, I installed the package.

However, SOUND HAS STOPPED PLAYING COMPLETELY ON THE XO-1 (the only time I
hear some sound is during boot-up time).

If I remove "alsa-plugins-pulseaudio", I can again hear the sound via
"alsasink", but not through "pulsesink".

If I re-install "alsa-plugins-pulseaudio", I can not hear sound through
"alsasink", nor "pulsesink",
(
    not even after doing the following steps ::

                           pulsesudio --kill
                           sudo rm -r ~/.pulse
                           sudo rm -r ~/.pulse-cookie
                           pulseaudio --start

                           <trying to run the mp3 with sudo previleges.>
)


So, what other thing could I possibly do?



Will be grateful for a reply.


Thanks and Regards,
Ajay
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