Fix EditorAudioBuses not updating when changing to a device with different channels

2 files changed, 10 insertions, 0 deletions

diff --git a/servers/audio_server.cpp b/servers/audio_server.cpp
index 6fd996c3d3..530976f084 100644
--- a/servers/audio_server.cpp
+++ b/servers/audio_server.cpp
@@ -737,6 +737,12 @@ float AudioServer::get_bus_volume_db(int p_bus) const {
 	return buses[p_bus]->volume_db;
 }
 
+int AudioServer::get_bus_channels(int p_bus) const {
+
+	ERR_FAIL_INDEX_V(p_bus, buses.size(), 0);
+	return buses[p_bus]->channels.size();
+}
+
 void AudioServer::set_bus_send(int p_bus, const StringName &p_send) {
 
 	ERR_FAIL_INDEX(p_bus, buses.size());
@@ -1267,6 +1273,8 @@ void AudioServer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_bus_name", "bus_idx"), &AudioServer::get_bus_name);
 	ClassDB::bind_method(D_METHOD("get_bus_index", "bus_name"), &AudioServer::get_bus_index);
 
+	ClassDB::bind_method(D_METHOD("get_bus_channels", "bus_idx"), &AudioServer::get_bus_channels);
+
 	ClassDB::bind_method(D_METHOD("set_bus_volume_db", "bus_idx", "volume_db"), &AudioServer::set_bus_volume_db);
 	ClassDB::bind_method(D_METHOD("get_bus_volume_db", "bus_idx"), &AudioServer::get_bus_volume_db);
 
diff --git a/servers/audio_server.h b/servers/audio_server.h
index 52fa84e3e6..642af9b252 100644
--- a/servers/audio_server.h
+++ b/servers/audio_server.h
@@ -299,6 +299,8 @@ public:
 	String get_bus_name(int p_bus) const;
 	int get_bus_index(const StringName &p_bus_name) const;
 
+	int get_bus_channels(int p_bus) const;
+
 	void set_bus_volume_db(int p_bus, float p_volume_db);
 	float get_bus_volume_db(int p_bus) const;