1 files changed, 24 insertions, 31 deletions

diff --git a/scene/3d/audio_stream_player_3d.h b/scene/3d/audio_stream_player_3d.h
index f86e19403c..abd5a841b2 100644
--- a/scene/3d/audio_stream_player_3d.h
+++ b/scene/3d/audio_stream_player_3d.h
@@ -31,10 +31,13 @@
 #ifndef AUDIO_STREAM_PLAYER_3D_H
 #define AUDIO_STREAM_PLAYER_3D_H
 
+#include "core/os/mutex.h"
+#include "scene/3d/area_3d.h"
 #include "scene/3d/node_3d.h"
 #include "scene/3d/velocity_tracker_3d.h"
 #include "servers/audio/audio_filter_sw.h"
 #include "servers/audio/audio_stream.h"
+#include "servers/audio_server.h"
 
 class Camera3D;
 class AudioStreamPlayer3D : public Node3D {
@@ -66,32 +69,10 @@ private:
 
 	};
 
-	struct Output {
-		AudioFilterSW filter;
-		AudioFilterSW::Processor filter_process[8];
-		AudioFrame vol[4];
-		float filter_gain = 0.0;
-		float pitch_scale = 0.0;
-		int bus_index = -1;
-		int reverb_bus_index = -1;
-		AudioFrame reverb_vol[4];
-		Viewport *viewport = nullptr; //pointer only used for reference to previous mix
-	};
-
-	Output outputs[MAX_OUTPUTS];
-	SafeNumeric<int> output_count;
-	SafeFlag output_ready;
-
-	//these are used by audio thread to have a reference of previous volumes (for ramping volume and avoiding clicks)
-	Output prev_outputs[MAX_OUTPUTS];
-	int prev_output_count = 0;
-
-	Ref<AudioStreamPlayback> stream_playback;
+	Vector<Ref<AudioStreamPlayback>> stream_playbacks;
 	Ref<AudioStream> stream;
-	Vector<AudioFrame> mix_buffer;
 
-	SafeNumeric<float> setseek{ -1.0 };
-	SafeFlag active;
+	SafeFlag active{ false };
 	SafeNumeric<float> setplay{ -1.0 };
 
 	AttenuationModel attenuation_model = ATTENUATION_INVERSE_DISTANCE;
@@ -99,18 +80,25 @@ private:
 	float unit_size = 10.0;
 	float max_db = 3.0;
 	float pitch_scale = 1.0;
+	// Internally used to take doppler tracking into account.
+	float actual_pitch_scale = 1.0;
 	bool autoplay = false;
-	bool stream_paused = false;
-	bool stream_paused_fade_in = false;
-	bool stream_paused_fade_out = false;
-	StringName bus;
+	StringName bus = SNAME("Master");
+	int max_polyphony = 1;
+
+	uint64_t last_mix_count = -1;
 
-	static void _calc_output_vol(const Vector3 &source_dir, real_t tightness, Output &output);
-	void _mix_audio();
-	static void _mix_audios(void *self) { reinterpret_cast<AudioStreamPlayer3D *>(self)->_mix_audio(); }
+	static void _calc_output_vol(const Vector3 &source_dir, real_t tightness, Vector<AudioFrame> &output);
+
+	void _calc_reverb_vol(Area3D *area, Vector3 listener_area_pos, Vector<AudioFrame> direct_path_vol, Vector<AudioFrame> &reverb_vol);
+
+	static void _listener_changed_cb(void *self) { reinterpret_cast<AudioStreamPlayer3D *>(self)->_update_panning(); }
 
 	void _set_playing(bool p_enable);
 	bool _is_active() const;
+	StringName _get_actual_bus();
+	Area3D *_get_overriding_area();
+	Vector<AudioFrame> _update_panning();
 
 	void _bus_layout_changed();
 
@@ -122,6 +110,8 @@ private:
 	float attenuation_filter_cutoff_hz = 5000.0;
 	float attenuation_filter_db = -24.0;
 
+	float linear_attenuation = 0;
+
 	float max_distance = 0.0;
 
 	Ref<VelocityTracker3D> velocity_tracker;
@@ -162,6 +152,9 @@ public:
 	void set_bus(const StringName &p_bus);
 	StringName get_bus() const;
 
+	void set_max_polyphony(int p_max_polyphony);
+	int get_max_polyphony() const;
+
 	void set_autoplay(bool p_enable);
 	bool is_autoplay_enabled();