[RFE] Add sound support about toolbox

[HarryMichal]

I believe this can be closed because Toolbox passes --volume /dev:/dev:rslave to podman create when a toolbox is created since v0.0.11.

[lsahn-gh]

This might work, --volume /dev/snd:/dev/snd.

Referred to this link, osrf/docker_images#21 (comment)

[lsahn-gh]

With the mounting of /dev/snd, an application inside container doesn't work well if it the sound is used on the host at the same time.

Errors of mpv

ALSA lib pcm_dmix.c:1108:(snd_pcm_dmix_open) unable to open slave
[ao/alsa] Playback open error: Device or resource busy
[ao/oss] Can't open audio device /dev/dsp: No such file or directory
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
[ao/jack] cannot open server
ALSA lib pcm_dmix.c:1108:(snd_pcm_dmix_open) unable to open slave
[ao/sdl] could not open audio: ALSA: Couldn't open audio device: Device or resource busy
[ao] Failed to initialize audio driver 'sdl'
Could not open/initialize audio device -> no sound.

[tosmi]

could this be implemented via an option e.g.

$ toolbox --enable-sound enter

my plan is to run vlc, emacs (using emms) or even firefox within the toolbox container and this would require sound support.

jm2c
toni

[aimileus]

I tried to use the PulseAudio socket from the host and that seems to be fine: PulseAudio works, even if the host uses audio at the same time.

1. Bind mount /dev/snd
2. Install pulseaudio-utils in the container with dnf.
3. Set $PULSE_SERVER to the value of /run/user/$(id -ru)/pulse/native, so that it uses the session of the host. I did not try to run a seperate PulseAudio session in the container.

Edit: Bind mounting /dev/snd is not necessary, of course, since the container does not access it directly.

[tosmi]

i just discovered that sound simply works with vlc. /run/user/<uid>/native is available within the container. didn't have to install pulseaudio-utils, $PULSE_SERVER is not set. i'm using toolbox from master.

[lsahn-gh]

Thank you all for the information, I will check it out both.

[lsahn-gh]

/dev/snd might be sometimes necessary. For instance, liquidwar. it tries to access to /dev/snd directly.
However, in my case, exporting PULSE_SERVER is necessary in 0.0.6.

[jodkalemon]

I copied toolbox to my homedir, added a
--volume /dev/snd;/dev/snd
line to the create function and ran google-chrome in it and it just works.