Ubuntu
pulseaudio package

Enable support for libsoxr

Bug #1574746 reported by Lastique
80
This bug affects 16 people
Affects Status Importance Assigned to Milestone
pulseaudio (Ubuntu)
Fix Released
Wishlist
Daniel van Vugt
Nominated for Bionic by Daniel van Vugt

Bug Description

I'd like to ask to enable support for libsoxr-based resamplers in the official Ubuntu packages for pulseaudio. The upstream already supports libsoxr and automatically detects its availability, so the only change really needed is to add the build dependency to debian/control.

The resamplers based in libsoxr offer better quality and better performace while introducing more delay compared to the speex resamplers that are used by default. The resamplers are documented in the man pages of pulseaudio in Ubuntu 16.04 but unfortunately are not enabled at build time ('pulseaudio --dump-resample-methods' doesn't list them). I've built local packages with libsoxr and verified that the resampler works as expected.

Revision history for this message
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in pulseaudio (Ubuntu):
status: New → Confirmed
Daniel van Vugt (vanvugt)
Changed in pulseaudio (Ubuntu):
importance: Undecided → Wishlist
Revision history for this message
Amr Ibrahim (amribrahim1987) wrote :

I support building with libsoxr.

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

As I understand it, pulseaudio is in "main" and so is only allowed to depend on other packages in "main". soxr on the other hand is in "universe", see:
https://launchpad.net/ubuntu/+source/libsoxr

So you may have to work through the process of getting libsoxr moved into main before we can update pulseaudio to explicitly depend on it:
https://wiki.ubuntu.com/MainInclusionProcess

Revision history for this message
Lastique (andysem) wrote :

I've created a MIR ticket for libsoxr: https://bugs.launchpad.net/ubuntu/+source/libsoxr/+bug/1702558

Revision history for this message
Neo (rdstmc) wrote :

Still not included in 18.04 delivery ...

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

That's mostly because fixing bug 1702558 is a prerequisite.

Daniel van Vugt (vanvugt)
Changed in pulseaudio (Ubuntu):
assignee: nobody → Daniel van Vugt (vanvugt)
status: Confirmed → In Progress
Revision history for this message
賴家亨 (laichiaheng) wrote :

It is 2018-10-11, and it hasn't been done since 2016-04-25

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

The required change to libsoxr is now in 18.10 (and only in 18.10). However 18.10 is about to be released so it's too late to change pulseaudio there. We would be aiming for 19.04 and later now. Please give me a reminder again in November if no further progress has been made by then.

Changed in pulseaudio (Ubuntu):
status: In Progress → Triaged
Revision history for this message
Daniel van Vugt (vanvugt) wrote :

Good news: Comment #8 is wrong.

I forgot that I had already released a new PulseAudio (v12.x) into Ubuntu 18.10 with libsoxr support enabled. So the fix is already in Ubuntu 18.10.

Changed in pulseaudio (Ubuntu):
status: Triaged → Fix Released
Revision history for this message
Lastique (andysem) wrote :

Yay, finally! Thank you Daniel.

Revision history for this message
Neo (rdstmc) wrote :

Hi,
Thanks.
I test it and I feel that sound is better with this re-sampler, as well lower on CPU.
Regards

Revision history for this message
Rijnhard Hessel (rijnhard) wrote :

Is it possible to get this backported to 18.04?

Revision history for this message
Daniel van Vugt (vanvugt) wrote :

It's probably possible, but is not a priority. And probably difficult to justify any enhancement request like this being backported to a stable release. If anyone would like to try then go ahead:

https://wiki.ubuntu.com/StableReleaseUpdates

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