pipewire: move pipewire-media-session to its own output and module

1 files changed, 336 insertions, 0 deletions

diff --git a/nixos/modules/services/desktops/pipewire/pipewire-media-session.nix b/nixos/modules/services/desktops/pipewire/pipewire-media-session.nix
new file mode 100644
index 00000000000..b91bdcd6700
--- /dev/null
+++ b/nixos/modules/services/desktops/pipewire/pipewire-media-session.nix
@@ -0,0 +1,336 @@
+# pipewire example session manager.
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.pipewire.pwms;
+  enable32BitAlsaPlugins = cfg.alsa.support32Bit
+                           && pkgs.stdenv.isx86_64
+                           && pkgs.pkgsi686Linux.pipewire != null;
+
+  # Helpers for generating the pipewire JSON config file
+  mkSPAValueString = v:
+  if builtins.isList v then "[${lib.concatMapStringsSep " " mkSPAValueString v}]"
+  else if lib.types.attrs.check v then
+    "{${lib.concatStringsSep " " (mkSPAKeyValue v)}}"
+  else lib.generators.mkValueStringDefault { } v;
+
+  mkSPAKeyValue = attrs: map (def: def.content) (
+  lib.sortProperties
+    (
+      lib.mapAttrsToList
+        (k: v: lib.mkOrder (v._priority or 1000) "${lib.escape [ "=" ] k} = ${mkSPAValueString (v._content or v)}")
+        attrs
+    )
+  );
+
+  toSPAJSON = attrs: lib.concatStringsSep "\n" (mkSPAKeyValue attrs);
+in {
+
+  meta = {
+    maintainers = teams.freedesktop.members;
+  };
+
+  ###### interface
+  options = {
+    services.pipewire.pwms = {
+      enable = mkEnableOption "Example pipewire session manager";
+
+      package = mkOption {
+        type = types.package;
+        default = pkgs.pipewire.mediaSession;
+        example = literalExample "pkgs.pipewire.mediaSession";
+        description = ''
+          The pipewire-media-session derivation to use.
+        '';
+      };
+
+      config = mkOption {
+        type = types.attrs;
+        description = ''
+          Configuration for the media session core.
+        '';
+        default = {
+          # media-session config file
+          properties = {
+            # Properties to configure the session and some
+            # modules
+            #mem.mlock-all = false
+            #context.profile.modules = default,rtkit
+          };
+
+          spa-libs = {
+            # Mapping from factory name to library.
+            "api.bluez5.*" = "bluez5/libspa-bluez5";
+            "api.alsa.*" = "alsa/libspa-alsa";
+            "api.v4l2.*" = "v4l2/libspa-v4l2";
+            "api.libcamera.*" = "libcamera/libspa-libcamera";
+          };
+
+          modules = {
+            # These are the modules that are enabled when a file with
+            # the key name is found in the media-session.d config directory.
+            # the default bundle is always enabled.
+
+            default = [
+              "flatpak"			# manages flatpak access
+              "portal"			# manage portal permissions
+              "v4l2"			# video for linux udev detection
+              #"libcamera"		# libcamera udev detection
+              "suspend-node"		# suspend inactive nodes
+              "policy-node"		# configure and link nodes
+              #"metadata"		# export metadata API
+              #"default-nodes"		# restore default nodes
+              #"default-profile"	# restore default profiles
+              #"default-routes"		# restore default route
+              #"streams-follow-default"	# move streams when default changes
+              #"alsa-seq"		# alsa seq midi support
+              #"alsa-monitor"		# alsa udev detection
+              #"bluez5"			# bluetooth support
+              #"restore-stream"		# restore stream settings
+            ];
+            "with-audio" = [
+              "metadata"
+              "default-nodes"
+              "default-profile"
+              "default-routes"
+              "alsa-seq"
+              "alsa-monitor"
+            ];
+            "with-alsa" = [
+              "with-audio"
+            ];
+            "with-jack" = [
+              "with-audio"
+            ];
+            "with-pulseaudio" = [
+              "with-audio"
+              "bluez5"
+              "restore-stream"
+              "streams-follow-default"
+            ];
+          };
+        };
+      };
+
+      alsaMonitorConfig = mkOption {
+        type = types.attrs;
+        description = ''
+          Configuration for the alsa monitor.
+        '';
+        default = {
+          # alsa-monitor config file
+          properties = {
+            #alsa.jack-device = true
+          };
+
+          rules = [
+          # an array of matches/actions to evaluate
+          {
+            # rules for matching a device or node. It is an array of
+            # properties that all need to match the regexp. If any of the
+            # matches work, the actions are executed for the object.
+            matches = [
+              {
+                # this matches all cards
+                device.name = "~alsa_card.*";
+              }
+            ];
+            actions = {
+              # actions can update properties on the matched object.
+              update-props = {
+                api.alsa.use-acp = true;
+                #api.alsa.use-ucm = true
+                #api.alsa.soft-mixer = false
+                #api.alsa.ignore-dB = false
+                #device.profile-set = "profileset-name"
+                #device.profile = "default profile name"
+                api.acp.auto-profile = false;
+                api.acp.auto-port = false;
+                #device.nick = "My Device"
+              };
+            };
+          }
+          {
+            matches = [
+              {
+                # matches all sinks
+                node.name = "~alsa_input.*";
+              }
+              {
+                # matches all sources
+                node.name = "~alsa_output.*";
+              }
+            ];
+            actions = {
+              update-props = {
+                #node.nick = 			"My Node"
+                #node.nick = 			null
+                #priority.driver = 		100
+                #priority.session = 		100
+                #node.pause-on-idle = 		false
+                #resample.quality = 		4
+                #channelmix.normalize =		false
+                #channelmix.mix-lfe = 		false
+                #audio.channels = 		2
+                #audio.format = 		"S16LE"
+                #audio.rate = 			44100
+                #audio.position = 		"FL,FR"
+                #api.alsa.period-size =         1024
+                #api.alsa.headroom =            0
+                #api.alsa.disable-mmap =        false
+                #api.alsa.disable-batch =       false
+              };
+            };
+          }
+          ];
+        };
+      };
+
+      bluezMonitorConfig = mkOption {
+        type = types.attrs;
+        description = ''
+          Configuration for the bluez5 monitor.
+        '';
+        default = {
+          # bluez-monitor config file
+          properties = {
+            # msbc is not expected to work on all headset + adapter combinations.
+            #bluez5.msbc-support = true
+            #bluez5.sbc-xq-support = true
+
+            # Enabled headset roles (default: [ hsp_hs hfp_ag ]), this
+            # property only applies to native backend. Currently some headsets
+            # (Sony WH-1000XM3) are not working with both hsp_ag and hfp_ag
+            # enabled, disable either hsp_ag or hfp_ag to work around it.
+            #
+            # Supported headset roles: hsp_hs (HSP Headset),
+            #                          hsp_ag (HSP Audio Gateway),
+            #                          hfp_ag (HFP Audio Gateway)
+            #bluez5.headset-roles = [ hsp_hs hsp_ag hfp_ag ]
+
+            # Enabled A2DP codecs (default: all)
+            #bluez5.codecs = [ sbc aac ldac aptx aptx_hd ]
+          };
+
+          rules = [
+          # an array of matches/actions to evaluate
+          {
+            # rules for matching a device or node. It is an array of
+            # properties that all need to match the regexp. If any of the
+            # matches work, the actions are executed for the object.
+            matches = [
+              {
+                # this matches all cards
+                device.name = "~bluez_card.*";
+              }
+            ];
+            actions = {
+              # actions can update properties on the matched object.
+              update-props = {
+                #device.nick = 			"My Device"
+              };
+            };
+          }
+          {
+            matches = [
+              {
+                # matches all sinks
+                node.name = "~bluez_input.*";
+              }
+              {
+                # matches all sources
+                node.name = "~bluez_output.*";
+              }
+            ];
+            actions = {
+              update-props = {
+                #node.nick = 			"My Node"
+                #node.nick = 			null
+                #priority.driver = 		100
+                #priority.session = 		100
+                #node.pause-on-idle = 		false
+                #resample.quality = 		4
+                #channelmix.normalize =		false
+                #channelmix.mix-lfe = 		false
+              };
+            };
+          }
+          ];
+        };
+      };
+
+      v4l2MonitorConfig = mkOption {
+        type = types.attrs;
+        description = ''
+          Configuration for the V4L2 monitor.
+        '';
+        default = {
+          # v4l2-monitor config file
+          properties = {
+          };
+
+          rules = [
+            # an array of matches/actions to evaluate
+            {
+              # rules for matching a device or node. It is an array of
+              # properties that all need to match the regexp. If any of the
+              # matches work, the actions are executed for the object.
+              matches = [
+                {
+                  # this matches all devices
+                  device.name = "~v4l2_device.*";
+                }
+              ];
+              actions = {
+                # actions can update properties on the matched object.
+                update-props = {
+                  #device.nick = 			"My Device"
+                };
+              };
+            }
+            {
+              matches = [
+                {
+                  # matches all sinks
+                  node.name = "~v4l2_input.*";
+                }
+                {
+                  # matches all sources
+                  node.name = "~v4l2_output.*";
+                }
+              ];
+              actions = {
+                update-props = {
+                  #node.nick = 			"My Node"
+                  #node.nick = 			null
+                  #priority.driver = 		100
+                  #priority.session = 		100
+                  #node.pause-on-idle = 		true
+                };
+              };
+            }
+          ];
+        };
+      };
+    };
+  };
+
+  ###### implementation
+  config = mkIf cfg.enable {
+    environment.systemPackages = [ cfg.package ];
+    services.pipewire.sessionManagerExecutable = "${cfg.package}/bin/pipewire-media-session";
+
+    environment.etc."pipewire/media-session.d/media-session.conf" = { text = toSPAJSON cfg.config; };
+    environment.etc."pipewire/media-session.d/v4l2-monitor.conf" = { text = toSPAJSON cfg.v4l2MonitorConfig; };
+
+    environment.etc."pipewire/media-session.d/with-alsa" = mkIf config.services.pipewire.alsa.enable { text = ""; };
+    environment.etc."pipewire/media-session.d/alsa-monitor.conf" = mkIf config.services.pipewire.alsa.enable { text = toSPAJSON cfg.alsaMonitorConfig; };
+
+    environment.etc."pipewire/media-session.d/with-pulseaudio" = mkIf config.services.pipewire.pulse.enable { text = ""; };
+    environment.etc."pipewire/media-session.d/bluez-monitor.conf" = mkIf config.services.pipewire.pulse.enable { text = toSPAJSON cfg.bluezMonitorConfig; };
+
+    environment.etc."pipewire/media-session.d/with-jack" = mkIf config.services.pipewire.jack.enable { text = ""; };
+  };
+}