Demi Marie Obenour <demiobenour@gmail.com> writes:

> WirePlumber is completely overkill as a session manager here, and
> ideally a trivial session manager would be used instead.  I did build a
> Spectrum OS image and found that PipeWire and WirePlumber both
> successfully started.  PipeWire is configured to listen on the
> PulseAudio socket, so PulseAudio compatibility works.  This does inject
> a large number of completely unnecessary files into the VM, notably for
> libcamera and Bluetooth support.
>
> Signed-off-by: Demi Marie Obenour <demiobenour@gmail.com>
> ---
>
> Notes:
>     I tested this with QEMU virtio-sound, but I am not sure if the paramters
>     are correct.  In particular, the sample rate might well be wrong.
>
>  img/app/Makefile                              |  28 +-
>  img/app/default.nix                           |  18 +
>  img/app/etc/pipewire/pipewire.conf            | 291 ++++++++
>  .../etc/s6-rc/app/dependencies.d/directories  |   0
>  .../app/dependencies.d/directories.license    |   2 +
>  .../etc/s6-rc/app/dependencies.d/wireplumber  |   0
>  .../app/dependencies.d/wireplumber.license    |   2 +
>  .../etc/s6-rc/dbus/dependencies.d/directories |   0
>  .../dbus/dependencies.d/directories.license   |   2 +
>  img/app/etc/s6-rc/directories/type            |   1 +
>  img/app/etc/s6-rc/directories/type.license    |   2 +
>  img/app/etc/s6-rc/directories/up              |  11 +
>  .../s6-rc/pipewire/dependencies.d/directories |   0
>  .../dependencies.d/directories.license        |   2 +
>  img/app/etc/s6-rc/pipewire/notification-fd    |   1 +
>  .../s6-rc/pipewire/notification-fd.license    |   2 +
>  img/app/etc/s6-rc/pipewire/run                |  20 +
>  img/app/etc/s6-rc/pipewire/type               |   1 +
>  img/app/etc/s6-rc/pipewire/type.license       |   2 +
>  .../dependencies.d/directories                |   0
>  .../dependencies.d/directories.license        |   2 +
>  img/app/etc/s6-rc/wayland-proxy-virtwl/run    |  11 -
>  .../etc/s6-rc/wireplumber/dependencies.d/dbus |   0
>  .../wireplumber/dependencies.d/dbus.license   |   2 +
>  .../s6-rc/wireplumber/dependencies.d/pipewire |   0
>  .../dependencies.d/pipewire.license           |   2 +
>  img/app/etc/s6-rc/wireplumber/run             |   4 +
>  img/app/etc/s6-rc/wireplumber/type            |   1 +
>  img/app/etc/s6-rc/wireplumber/type.license    |   2 +
>  img/app/etc/wireplumber/wireplumber.conf      | 676 ++++++++++++++++++

The PipeWire and WirePlumber config files are still very big.  Is it
really not possible to make them smaller and rely on defaults where
possible?  With a whole big config like this, it's difficult to see what
Spectrum-specific stuff is going on.

> diff --git a/img/app/default.nix b/img/app/default.nix
> index 740643ac41f6473cdb6f6b0fd1f5f47f4493240d..8c469ee5b9a672bf6504600b09ff1f57fb87f2d9 100644
> --- a/img/app/default.nix
> +++ b/img/app/default.nix
> @@ -26,6 +26,20 @@ let
>            CONFIG_FEATURE_IP_ROUTE y
>            CONFIG_INIT n
>            CONFIG_IP y
> +          CONFIG_FACTOR n
> +          CONFIG_FOLD n
> +          CONFIG_LSSCSI n
> +          CONFIG_NANDWRITE n
> +          CONFIG_NANDDUMP n
> +          CONFIG_RAIDAUTORUN n
> +          CONFIG_RFKILL n
> +          CONFIG_UBIATTACH n
> +          CONFIG_UBIDETACH n
> +          CONFIG_UBIMKVOL n
> +          CONFIG_UBIRMVOL n
> +          CONFIG_UBIRSVOL n
> +          CONFIG_UBIUPDATEVOL n
> +          CONFIG_UBIRENAME n

Do these all conflict with PipeWire/WirePlumber/PulseAudio??