Clean up latency related functions

modules/theora/video_stream_theora.cpp

@@ -365,7 +365,7 @@ void VideoStreamPlaybackTheora::set_file(const String &p_file) {
 
 float VideoStreamPlaybackTheora::get_time() const {
 
-	return time - AudioServer::get_singleton()->get_output_delay() - delay_compensation; //-((get_total())/(float)vi.rate);
+	return time - AudioServer::get_singleton()->get_output_latency() - delay_compensation; //-((get_total())/(float)vi.rate);
 };
 
 Ref<Texture> VideoStreamPlaybackTheora::get_texture() {

modules/webm/video_stream_webm.cpp

@@ -375,7 +375,7 @@ int VideoStreamPlaybackWebm::get_mix_rate() const {
 inline bool VideoStreamPlaybackWebm::has_enough_video_frames() const {
 	if (video_frames_pos > 0) {
 
-		const double audio_delay = AudioServer::get_singleton()->get_output_delay();
+		const double audio_delay = AudioServer::get_singleton()->get_output_latency();
 		const double video_time = video_frames[video_frames_pos - 1]->time;
 		return video_time >= time + audio_delay + delay_compensation;
 	}
@@ -383,7 +383,7 @@ inline bool VideoStreamPlaybackWebm::has_enough_video_frames() const {
 }
 
 bool VideoStreamPlaybackWebm::should_process(WebMFrame &video_frame) {
-	const double audio_delay = AudioServer::get_singleton()->get_output_delay();
+	const double audio_delay = AudioServer::get_singleton()->get_output_latency();
 	return video_frame.time >= time + audio_delay + delay_compensation;
 }
 

platform/android/export/export.cpp

@@ -1735,8 +1735,8 @@ public:
 								new_file += l + "\n";
 							} else {
 								String base = l.substr(0, last_tag_pos + last_tag.length());
-								if (manifest_sections.has("application_tags")) {
-									for (List<String>::Element *E = manifest_sections["application_tags"].front(); E; E = E->next()) {
+								if (manifest_sections.has("application_attribs")) {
+									for (List<String>::Element *E = manifest_sections["application_attribs"].front(); E; E = E->next()) {
 										String to_add = E->get().strip_edges();
 										base += " " + to_add + " ";
 									}

servers/audio/effects/audio_effect_spectrum_analyzer.cpp

@@ -130,7 +130,7 @@ Vector2 AudioEffectSpectrumAnalyzerInstance::get_magnitude_for_frequency_range(f
 	}
 	uint64_t time = OS::get_singleton()->get_ticks_usec();
 	float diff = double(time - last_fft_time) / 1000000.0 + base->get_tap_back_pos();
-	diff -= AudioServer::get_singleton()->get_output_delay();
+	diff -= AudioServer::get_singleton()->get_output_latency();
 	float fft_time_size = float(fft_size) / mix_rate;
 
 	int fft_index = fft_pos;

servers/audio_server.cpp

@@ -68,16 +68,16 @@ void AudioDriver::audio_server_process(int p_frames, int32_t *p_buffer, bool p_u
 
 void AudioDriver::update_mix_time(int p_frames) {
 
-	_mix_amount += p_frames;
+	_last_mix_frames = p_frames;
 	if (OS::get_singleton())
 		_last_mix_time = OS::get_singleton()->get_ticks_usec();
 }
 
-double AudioDriver::get_mix_time() const {
+double AudioDriver::get_time_to_next_mix() const {
 
 	double total = (OS::get_singleton()->get_ticks_usec() - _last_mix_time) / 1000000.0;
-	total += _mix_amount / (double)get_mix_rate();
-	return total;
+	double mix_buffer = _last_mix_frames / (double)get_mix_rate();
+	return mix_buffer - total;
 }
 
 void AudioDriver::input_buffer_init(int driver_buffer_frames) {
@@ -148,7 +148,7 @@ Array AudioDriver::capture_get_device_list() {
 AudioDriver::AudioDriver() {
 
 	_last_mix_time = 0;
-	_mix_amount = 0;
+	_last_mix_frames = 0;
 	input_position = 0;
 	input_size = 0;
 
@@ -281,13 +281,6 @@ void AudioServer::_driver_process(int p_frames, int32_t *p_buffer) {
 		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;
-	}
-
 #ifdef DEBUG_ENABLED
 	prof_time += OS::get_singleton()->get_ticks_usec() - prof_ticks;
 #endif
@@ -1107,13 +1100,14 @@ AudioServer *AudioServer::get_singleton() {
 	return singleton;
 }
 
-double AudioServer::get_mix_time() const {
+double AudioServer::get_output_latency() const {
 
-	return 0;
+	return AudioDriver::get_singleton()->get_latency();
 }
-double AudioServer::get_output_delay() const {
 
-	return 0;
+double AudioServer::get_time_to_next_mix() const {
+
+	return AudioDriver::get_singleton()->get_time_to_next_mix();
 }
 
 AudioServer *AudioServer::singleton = NULL;
@@ -1357,6 +1351,9 @@ void AudioServer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("get_device"), &AudioServer::get_device);
 	ClassDB::bind_method(D_METHOD("set_device", "device"), &AudioServer::set_device);
 
+	ClassDB::bind_method(D_METHOD("get_time_to_next_mix"), &AudioServer::get_time_to_next_mix);
+	ClassDB::bind_method(D_METHOD("get_output_latency"), &AudioServer::get_output_latency);
+
 	ClassDB::bind_method(D_METHOD("capture_get_device_list"), &AudioServer::capture_get_device_list);
 	ClassDB::bind_method(D_METHOD("capture_get_device"), &AudioServer::capture_get_device);
 	ClassDB::bind_method(D_METHOD("capture_set_device", "name"), &AudioServer::capture_set_device);
@@ -1386,6 +1383,8 @@ AudioServer::AudioServer() {
 #ifdef DEBUG_ENABLED
 	prof_time = 0;
 #endif
+	mix_time = 0;
+	mix_size = 0;
 }
 
 AudioServer::~AudioServer() {

servers/audio_server.h

@@ -45,7 +45,7 @@ class AudioDriver {
 
 	static AudioDriver *singleton;
 	uint64_t _last_mix_time;
-	uint64_t _mix_amount;
+	uint64_t _last_mix_frames;
 
 #ifdef DEBUG_ENABLED
 	uint64_t prof_ticks;
@@ -71,7 +71,8 @@ protected:
 #endif
 
 public:
-	double get_mix_time() const; //useful for video -> audio sync
+	double get_time_since_last_mix() const; //useful for video -> audio sync
+	double get_time_to_next_mix() const;
 
 	enum SpeakerMode {
 		SPEAKER_MODE_STEREO,
@@ -163,6 +164,9 @@ public:
 	typedef void (*AudioCallback)(void *p_userdata);
 
 private:
+	uint64_t mix_time;
+	int mix_size;
+
 	uint32_t buffer_size;
 	uint64_t mix_count;
 	uint64_t mix_frames;
@@ -351,8 +355,8 @@ public:
 
 	static AudioServer *get_singleton();
 
-	virtual double get_mix_time() const; //useful for video -> audio sync
-	virtual double get_output_delay() const;
+	virtual double get_output_latency() const;
+	virtual double get_time_to_next_mix() const;
 
 	void *audio_data_alloc(uint32_t p_data_len, const uint8_t *p_from_data = NULL);
 	void audio_data_free(void *p_data);
@@ -377,7 +381,6 @@ public:
 	String capture_get_device();
 	void capture_set_device(const String &p_name);
 
-	float get_output_latency() { return output_latency; }
 	AudioServer();
 	virtual ~AudioServer();
 };