linux server possible? about scream HOT 8 OPEN

Today a reddit user asked me if it was possible to have IVSHMEM from linux guest to linux host because in his particular case the network option was not viable so I hacked together this linux transmitter for pulseaudio.
It's far from feature complete, it doesn't support the network mode at all (pulseaudio can do that on it's own) and at the moment it handle only one default channel mapping, but I hope it's useful to others so I'm leaving it here.

from scream.

@tadly I have been sending Linux audio to a Windows receiver for years now, this is my setup:

1. Windows:
   1a) Download pulseaudio for Windows (http://bosmans.ch/pulseaudio/pulseaudio-1.1.zip)
   1b) Open the default.pa file with notepad++ and add this line:
   load-module module-native-protocol-tcp listen=0.0.0.0 auth-anonymous=1
   1c) Run pulseaudio.exe
   1d) Make a shortcut for it on the special "shell:startup" folder to auto-start it (optional)

2. Linux:
   2a) Option 1: open a terminal, type in (if you use a bash-compatible shell):
   PULSE_SERVER=192.168.xxx.xxx firefox
   To run firefox, for example, pointed at your Windows IP address, and the audio will be routed through it in real time.
   You can, for example, set this as a global shell variable on the environment, and you won't need to specify the PULSE_SERVER manually.
   2b) Option 2: open /etc/pulse/client.conf and add or alter this line:
   default-server = 192.168.xxx.xxx

Replace 192.168.xxx.xxx with your Windows IP, obviously.
If everything is ok, it should work right away.

from scream.

I have an up-to-date patched PulseAudio build for Windows. It works well with networked audio via module-native-protocol-tcp, and I've been using it with module-tunnel-sink-new over WiFi for a while.

from scream.

No, the driver is only available on Windows.

AFAIK, Linux has no common kernel-space sound subsystem. There's ALSA, OSS, pulse ... There are a couple of ways to send audio from Linux to other systems. First come to mind is the multicast RTP sink for PulseAudio. You can receive that with any RTP audio sink, e.g. VLC.

from scream.

@duncanthrax To bad. Was really hopeful for a sec. :)
AFAIK there's only OSS and alsa in regards to kernel-space.

From the wonderful arch-wiki:

The Advanced Linux Sound Architecture (ALSA) provides kernel driven sound card drivers. It replaces the original Open Sound System (OSS).

Hence OSS should be considered legacy/deprecated anyways IMO.

Pulse, Jack and even the upcoming pipewire project are all user-space.
What I'm trying to say is, focusing on alsa would be enough when it comes to kernel-space.
That said, I do not know how scream is implemented and when it comes to audio in general my knowledge is very limited. I know that only one app at a time can use alsa (one reason for why pulse etc. exist).

@LeonardoCurvelo Before my HW wired setup I was playing with pulse as well but didn't like it much.
It felt to bloated and for me it wasn't all that stable either.

from scream.

Need sender stream for screamer based alsa.
I use and windows and Linux. Sending sound to the router. No sound in Linux is sad.

from scream.

@martinellimarco Will there ever be a similar thing but Linux host to Windows guest, via low-latency IVSHMEM?

from scream.

@minmossi I think it is a bit out of scope for Scream, but it's not impossible to do. I don't really have the time to work on something like this at the moment, but who knows, if there is enough interest I may work on it in the future.

from scream.