wireplumber: Add Equalizer filter chain node

- The filter has two bands one for bass and another one for treble.
- The filter node attaches itself to multimedia endpoint, this setting
  is configurable.
- Also add a patch to fix the dangling logs issue in the endpoints
  policy.

Bug-AGL: SPEC-4931
Change-Id: Ibb3f56ac40eedc8c30445186624e50cbb3049afa
Signed-off-by: Ashok Sidipotu <ashok.sidipotu@collabora.com>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/29466
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Tested-by: Jenkins Job builder account

1 files changed, 41 insertions, 0 deletions

diff --git a/meta-pipewire/recipes-multimedia/wireplumber/wireplumber-config-agl/wireplumber.conf b/meta-pipewire/recipes-multimedia/wireplumber/wireplumber-config-agl/wireplumber.conf
index 680a791f3..46ad11302 100644
--- a/meta-pipewire/recipes-multimedia/wireplumber/wireplumber-config-agl/wireplumber.conf
+++ b/meta-pipewire/recipes-multimedia/wireplumber/wireplumber-config-agl/wireplumber.conf
@@ -57,6 +57,47 @@ context.modules = [
 
   # Provides factories to make session manager objects.
   { name = libpipewire-module-session-manager }
+
+  { name = libpipewire-module-filter-chain
+    args = {
+          node.description = "Equalizer Sink"
+          media.name       = "Equalizer Sink"
+          filter.graph = {
+              nodes = [
+                  {
+                      type  = builtin
+                      name  = bass
+                      label = bq_lowshelf
+                      # the cut off freq of the bass filter can be adjusted here.
+                      control = { "Freq" = 250.0 "Q" = 1.0 "Gain" = 0.0 }
+                  }
+                  {
+                      type  = builtin
+                      name  = treble
+                      label = bq_peaking
+                      # the cut off freq of the treble filter can be adjusted here.
+                      control = { "Freq" = 6000.0 "Q" = 1.0 "Gain" = 0.0 }
+                  }
+              ]
+              links = [
+                  { output = "bass:Out" input = "treble:In" }
+              ]
+          }
+          audio.channels = 2
+          audio.position = [ FL FR ]
+          capture.props = {
+              node.name   = "eq-sink"
+              media.class = Audio/Sink
+              # select the endpoint to which the node is attached
+              target.endpoint = "endpoint.multimedia"
+              node.passive = true
+          }
+          playback.props = {
+              node.name   = "eq-output-stream"
+              node.passive = true
+          }
+      }
+  }
 ]
 
 wireplumber.components = [