1 files changed, 51 insertions, 1 deletions

diff --git a/servers/audio_server.cpp b/servers/audio_server.cpp
index fead2f54da..0cead5b2ba 100644
--- a/servers/audio_server.cpp
+++ b/servers/audio_server.cpp
@@ -80,6 +80,14 @@ double AudioDriver::get_mix_time() const {
 	return total;
 }
 
+void AudioDriver::input_buffer_init(int driver_buffer_frames) {
+
+	const int input_buffer_channels = 2;
+	input_buffer.resize(driver_buffer_frames * input_buffer_channels * 4);
+	input_position = 0;
+	input_size = 0;
+}
+
 void AudioDriver::input_buffer_write(int32_t sample) {
 
 	input_buffer.write[input_position++] = sample;
@@ -452,6 +460,14 @@ void AudioServer::_mix_step() {
 	to_mix = buffer_size;
 }
 
+bool AudioServer::thread_has_channel_mix_buffer(int p_bus, int p_buffer) const {
+	if (p_bus < 0 || p_bus >= buses.size())
+		return false;
+	if (p_buffer < 0 || p_buffer >= buses[p_bus]->channels.size())
+		return false;
+	return true;
+}
+
 AudioFrame *AudioServer::thread_get_channel_mix_buffer(int p_bus, int p_buffer) {
 
 	ERR_FAIL_INDEX_V(p_bus, buses.size(), NULL);
@@ -721,6 +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());
@@ -926,6 +948,7 @@ void AudioServer::init() {
 
 	channel_disable_threshold_db = GLOBAL_DEF_RST("audio/channel_disable_threshold_db", -60.0);
 	channel_disable_frames = float(GLOBAL_DEF_RST("audio/channel_disable_time", 2.0)) * get_mix_rate();
+	ProjectSettings::get_singleton()->set_custom_property_info("audio/channel_disable_time", PropertyInfo(Variant::REAL, "audio/channel_disable_time", PROPERTY_HINT_RANGE, "0,5,0.01,or_greater"));
 	buffer_size = 1024; //hardcoded for now
 
 	init_channels_and_buffers();
@@ -1004,11 +1027,16 @@ void AudioServer::update() {
 	AudioDriver::get_singleton()->reset_profiling_time();
 	prof_time = 0;
 #endif
+
+	for (Set<CallbackItem>::Element *E = update_callbacks.front(); E; E = E->next()) {
+
+		E->get().callback(E->get().userdata);
+	}
 }
 
 void AudioServer::load_default_bus_layout() {
 
-	if (FileAccess::exists("res://default_bus_layout.tres")) {
+	if (ResourceLoader::exists("res://default_bus_layout.tres")) {
 		Ref<AudioBusLayout> default_layout = ResourceLoader::load("res://default_bus_layout.tres");
 		if (default_layout.is_valid()) {
 			set_bus_layout(default_layout);
@@ -1129,6 +1157,25 @@ void AudioServer::remove_callback(AudioCallback p_callback, void *p_userdata) {
 	unlock();
 }
 
+void AudioServer::add_update_callback(AudioCallback p_callback, void *p_userdata) {
+	lock();
+	CallbackItem ci;
+	ci.callback = p_callback;
+	ci.userdata = p_userdata;
+	update_callbacks.insert(ci);
+	unlock();
+}
+
+void AudioServer::remove_update_callback(AudioCallback p_callback, void *p_userdata) {
+
+	lock();
+	CallbackItem ci;
+	ci.callback = p_callback;
+	ci.userdata = p_userdata;
+	update_callbacks.erase(ci);
+	unlock();
+}
+
 void AudioServer::set_bus_layout(const Ref<AudioBusLayout> &p_bus_layout) {
 
 	ERR_FAIL_COND(p_bus_layout.is_null() || p_bus_layout->buses.size() == 0);
@@ -1250,6 +1297,8 @@ 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);
 
@@ -1297,6 +1346,7 @@ void AudioServer::_bind_methods() {
 	ADD_SIGNAL(MethodInfo("bus_layout_changed"));
 
 	BIND_ENUM_CONSTANT(SPEAKER_MODE_STEREO);
+	BIND_ENUM_CONSTANT(SPEAKER_SURROUND_31);
 	BIND_ENUM_CONSTANT(SPEAKER_SURROUND_51);
 	BIND_ENUM_CONSTANT(SPEAKER_SURROUND_71);
 }