1269165 - getUserMedia fails to enumerate ALSA plugins

Status: RESOLVED FIXED

(Core :: WebRTC: Audio/Video, defect)

Description

[Jan Beich]

Attachment: Restore ALSA plugins detection on non-Linux after bug 757637

On FreeBSD there's no kernel ALSA, only plugins with OSS being default [1]. As GetDevicesInfo() started to use snd_card_next() enumerating devices no longer works.

$ aplay -l
aplay: device_list:273: no soundcards found...

$ aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
pulse
    PulseAudio Sound Server
oss
    Open Sound System

$ firefox -no-remote -profile $(mktemp -d) https://mozilla.github.io/webrtc-landing/
[getUserMedia example]
[Audio]
ALSA lib control.c:954:(snd_ctl_open_noupdate) Invalid CTL
ALSA lib control.c:954:(snd_ctl_open_noupdate) Invalid CTL
ALSA lib control.c:954:(snd_ctl_open_noupdate) Invalid CTL
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM
ALSA lib control.c:954:(snd_ctl_open_noupdate) Invalid CTL
ALSA lib pcm.c:2266:(snd_pcm_open_noupdate) Unknown PCM
[NotFoundError: The object can not be found here.]

[1] https://svnweb.freebsd.org/ports/head/audio/alsa-lib/files/asound.conf.sample?view=markup

Comment 1

[Jan Beich]

Attachment: workaround (screenshot)

Comment 2

[Jan Beich]

Another workaround is to use PulseAudio but it can be either misconfigured or not installed by choice. So, very few our users have a success story with Firefox Hello.

https://forums.freebsd.org/threads/50219/#post-280981

Comment 3

[Randell Jesup [:jesup] (needinfo me)]

Comment on attachment 8747492 [details] [diff] [review]
Restore ALSA plugins detection on non-Linux after bug 757637

Review of attachment 8747492 [details] [diff] [review]:
-----------------------------------------------------------------

Simple patch, doesn't affect mainline platforms

Comment 4

[Jan Beich]

https://treeherder.mozilla.org/#/jobs?repo=try&revision=1167aab53665

Comment 5

[Pulsebot]

https://hg.mozilla.org/integration/mozilla-inbound/rev/eaff251cdd9d

Comment 6

[Jan Beich]

Comment on attachment 8747492 [details] [diff] [review]
Restore ALSA plugins detection on non-Linux after bug 757637

Approval Request Comment
[Feature/regressing bug #]: bug 757637 regression, ESR stability
[User impact if declined]: broken WebRTC runtime on DragonFly and FreeBSD
[Describe test coverage new/current, TreeHerder]: m-i, m-c soon
[Risks and why]: Low, either broken build or regressing Chromium issue 95797
[String/UUID change made/needed]: None

Comment 7

[Carsten Book [:Tomcat]]

https://hg.mozilla.org/mozilla-central/rev/eaff251cdd9d

Comment 8

[Randell Jesup [:jesup] (needinfo me)]

with regards to uplift, NPTOB effectively; this is a no-op to our directly supported platforms.

Comment 9

[Ritu Kothari (:ritu) (Inactive, please n-i to RyanVM, jcristau, or pascal)]

Comment on attachment 8747492 [details] [diff] [review]
Restore ALSA plugins detection on non-Linux after bug 757637

NPOTB for shipped platforms, fixes bugs in FreeBSD and DragonFly builds, Aurora48+, Beta47+, ESR45+

Comment 10

[Wes Kocher (:KWierso) (Not reading bugmail; email directly if needed)]

https://hg.mozilla.org/releases/mozilla-aurora/rev/95a27b2a8a2d

Comment 11

[Wes Kocher (:KWierso) (Not reading bugmail; email directly if needed)]

https://hg.mozilla.org/releases/mozilla-esr45/rev/f58a4e2e5862

Comment 12

[Wes Kocher (:KWierso) (Not reading bugmail; email directly if needed)]

https://hg.mozilla.org/releases/mozilla-beta/rev/16291dce26a2