pipe_manager: do not move streams that set PW_KEY_TARGET_OBJECT to a different device than the one we are using

Author: wwmm

src/pipe_manager.cpp

@@ -308,6 +308,7 @@ void on_node_info(void* object, const struct pw_node_info* info) {
   }
 
   bool ignore_input_stream = false;
+  bool ignore_output_stream = false;
 
   if (nd->nd_info->media_class == tags::pipewire::media_class::input_stream && !pm->input_device.name.empty()) {
     if (const auto* target_object = spa_dict_lookup(info->props, PW_KEY_TARGET_OBJECT)) {
@@ -336,6 +337,33 @@ void on_node_info(void* object, const struct pw_node_info* info) {
     }
   }
 
+  if (nd->nd_info->media_class == tags::pipewire::media_class::output_stream && !pm->output_device.name.empty()) {
+    if (const auto* target_object = spa_dict_lookup(info->props, PW_KEY_TARGET_OBJECT)) {
+      /*
+        target.object can a name or serial number:
+        https://gitlab.freedesktop.org/pipewire/pipewire/-/blob/master/src/pipewire/keys.h#L334
+      */
+
+      uint64_t serial = SPA_ID_INVALID;
+
+      util::str_to_num(target_object, serial);
+
+      if (target_object != pm->output_device.name) {
+        ignore_output_stream = true;
+      } else if (serial != SPA_ID_INVALID && serial != pm->output_device.serial) {
+        ignore_output_stream = true;
+      }
+
+      if (ignore_output_stream) {
+        util::debug("The output stream " + nd->nd_info->name +
+                    " does not have as target the same output device used as EE: " + pm->output_device.name +
+                    "\n The user wants it to play to device " + target_object + ". We will ignore this stream.");
+
+        remove_node = true;
+      }
+    }
+  }
+
   if (remove_node) {
     nd->nd_info->proxy = nullptr;
 

util/NEWS.yaml

@@ -6,6 +6,7 @@ Description:
 - Features∶
 - Community Presets have been implemented. Users can install packages containing multiple Easy Effects presets to be imported and applied inside the application. These packages will be maintained and shipped by volunteers. You can search them on the repositories of your favorite distribution.
 - Added the ability of collapsing the sidebar to hide the effects list and expand the area of the effects user interface.
+- EasyEffects won't touch streams that define `PW_KEY_TARGET_OBJECT` to an output device that is different from the one EE is using.
 
 - Bug fixes∶
 - A change in GTK 4.14.1 prevented to apply the values inserted into the text field of our SpinButton widgets. This issue is now resolved.