[pulseaudio-discuss] jackdbus module, pulse fails to conform on device reservation API

[David Henningsson]

On 11/07/2012 12:52 AM, Ian Malone wrote:
> On 6 November 2012 15:58, Ian Malone <ibmalone at gmail.com> wrote:
> etc.
>
>
>>
>> I'll speculate that something somewhere is confused by the presence of
>> two devices and either Audio1 isn't being provided correctly by pulse
>> (though it does create it) or requested properly by Jack (though with
>> only one parameter that's difficult to believe).
>>
>
> I now know enough about dbus to confirm this, the second interface is
> not created properly for some reason.
>
> Here's Audio0:
> [liveuser at localhost ~]$ dbus-send --session --print-reply
> --reply-timeout=2000 --type=method_call
> --dest=org.freedesktop.ReserveDevice1.Audio0
> /org/freedesktop/ReserveDevice1/Audio0
> org.freedesktop.DBus.Introspectable.Introspect
> method return sender=:1.119 -> dest=:1.154 reply_serial=2
>     string "<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object
> Introspection 1.0//EN"
> "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
> <node> <!-- If you are looking for documentation make sure to check out
>        http://git.0pointer.de/?p=reserve.git;a=blob;f=reserve.txt -->
>   <interface name="org.freedesktop.ReserveDevice1">  <method
> name="RequestRelease">   <arg name="priority" type="i"
> direction="in"/>   <arg name="result" type="b" direction="out"/>
> </method>  <property name="Priority" type="i" access="read"/>
> <property name="ApplicationName" type="s" access="read"/>  <property
> name="ApplicationDeviceName" type="s" access="read"/> </interface>
> <interface name="org.freedesktop.DBus.Properties">  <method
> name="Get">   <arg name="interface" direction="in" type="s"/>   <arg
> name="property" direction="in" type="s"/>   <arg name="value"
> direction="out" type="v"/>  </method> </interface> <interface
> name="org.freedesktop.DBus.Introspectable">  <method
> name="Introspect">   <arg name="data" type="s" direction="out"/>
> </method> </interface></node>"
>
> Here's Audio1:
> [liveuser at localhost ~]$ dbus-send --session --print-reply
> --reply-timeout=2000 --type=method_call
> --dest=org.freedesktop.ReserveDevice1.Audio1
> /org/freedesktop/ReserveDevice1/Audio1
> org.freedesktop.DBus.Introspectable.Introspect
> method return sender=:1.119 -> dest=:1.155 reply_serial=2
>     string "<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object
> Introspection 1.0//EN"
> "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
> <node>
> </node>
> "
>
> At this point I don't think I have any doubt there's a bug in the
> pulse dbus handling.

Hi,

FWIW, I tried to reproduce this last evening under Ubuntu 12.10 (which 
uses PulseAudio 2.1), but it seems to create properly interfaces for the 
two card scenario here. I used the "d-feet" introspect program to 
verify. (Jackd2-dbus seemed to crash on startup for some reason I have 
not tracked down.)


-- 
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic