Added Performance.AUDIO_OUTPUT_LATENCY

2 files changed, 14 insertions, 0 deletions

diff --git a/servers/audio_server.cpp b/servers/audio_server.cpp
index f2df7119e7..69c1318a48 100644
--- a/servers/audio_server.cpp
+++ b/servers/audio_server.cpp
@@ -234,6 +234,13 @@ void AudioServer::_driver_process(int p_frames, int32_t *p_buffer) {
 		todo -= to_copy;
 		to_mix -= to_copy;
 	}
+
+	// Calculate latency for Performance.AUDIO_OUTPUT_LATENCY
+	if (OS::get_singleton()) {
+		uint64_t ticks = OS::get_singleton()->get_ticks_usec();
+		output_latency = (ticks - output_latency_ticks) / 1000000.f;
+		output_latency_ticks = ticks;
+	}
 }
 
 void AudioServer::_mix_step() {
@@ -1178,6 +1185,8 @@ AudioServer::AudioServer() {
 	mix_frames = 0;
 	channel_count = 0;
 	to_mix = 0;
+	output_latency = 0;
+	output_latency_ticks = 0;
 }
 
 AudioServer::~AudioServer() {
diff --git a/servers/audio_server.h b/servers/audio_server.h
index b7fcd9c093..f928acc7b5 100644
--- a/servers/audio_server.h
+++ b/servers/audio_server.h
@@ -190,6 +190,9 @@ private:
 
 	Mutex *audio_data_lock;
 
+	float output_latency;
+	uint64_t output_latency_ticks;
+
 	void init_channels_and_buffers();
 
 	void _mix_step();
@@ -306,6 +309,8 @@ public:
 	String get_device();
 	void set_device(String device);
 
+	float get_output_latency() { return output_latency; }
+
 	AudioServer();
 	virtual ~AudioServer();
 };