1 files changed, 112 insertions, 0 deletions
diff --git a/servers/audio/effects/audio_effect_delay.h b/servers/audio/effects/audio_effect_delay.h
new file mode 100644
index 0000000000..645561138b
--- /dev/null
+++ b/servers/audio/effects/audio_effect_delay.h
@@ -0,0 +1,112 @@
+#ifndef AUDIOEFFECTECHO_H
+#define AUDIOEFFECTECHO_H
+
+#include "servers/audio/audio_effect.h"
+
+class AudioEffectDelay;
+
+class AudioEffectDelayInstance : public AudioEffectInstance {
+	GDCLASS(AudioEffectDelayInstance,AudioEffectInstance)
+friend class AudioEffectDelay;
+	Ref<AudioEffectDelay> base;
+
+	Vector<AudioFrame> ring_buffer;
+
+	unsigned int ring_buffer_pos;
+	unsigned int ring_buffer_mask;
+
+	/* feedback buffer */
+	Vector<AudioFrame> feedback_buffer;
+
+	unsigned int feedback_buffer_pos;
+
+	AudioFrame h;
+	void _process_chunk(const AudioFrame *p_src_frames,AudioFrame *p_dst_frames,int p_frame_count);
+
+public:
+
+	virtual void process(const AudioFrame *p_src_frames,AudioFrame *p_dst_frames,int p_frame_count);
+
+};
+
+
+class AudioEffectDelay : public AudioEffect {
+	GDCLASS(AudioEffectDelay,AudioEffect)
+
+friend class AudioEffectDelayInstance;
+	enum {
+
+		MAX_DELAY_MS=3000,
+		MAX_TAPS=2
+	};
+
+	float dry;
+
+	bool tap_1_active;
+	float tap_1_delay_ms;
+	float tap_1_level;
+	float tap_1_pan;
+
+	bool tap_2_active;
+	float tap_2_delay_ms;
+	float tap_2_level;
+	float tap_2_pan;
+
+	bool feedback_active;
+	float feedback_delay_ms;
+	float feedback_level;
+	float feedback_lowpass;
+
+
+
+protected:
+
+	static void _bind_methods();
+public:
+
+	void set_dry(float p_dry);
+	float get_dry();
+
+	void set_tap1_active(bool p_active);
+	bool is_tap1_active() const;
+
+	void set_tap1_delay_ms(float p_delay_ms);
+	float get_tap1_delay_ms() const;
+
+	void set_tap1_level_db(float p_level_db);
+	float get_tap1_level_db() const;
+
+	void set_tap1_pan(float p_pan);
+	float get_tap1_pan() const;
+
+	void set_tap2_active(bool p_active);
+	bool is_tap2_active() const;
+
+	void set_tap2_delay_ms(float p_delay_ms);
+	float get_tap2_delay_ms() const;
+
+	void set_tap2_level_db(float p_level_db);
+	float get_tap2_level_db() const;
+
+	void set_tap2_pan(float p_pan);
+	float get_tap2_pan() const;
+
+	void set_feedback_active(bool p_active);
+	bool is_feedback_active() const;
+
+	void set_feedback_delay_ms(float p_delay_ms);
+	float get_feedback_delay_ms() const;
+
+	void set_feedback_level_db(float p_level_db);
+	float get_feedback_level_db() const;
+
+	void set_feedback_lowpass(float p_lowpass);
+	float get_feedback_lowpass() const;
+
+	Ref<AudioEffectInstance> instance();
+
+	AudioEffectDelay();
+};
+
+
+#endif // AUDIOEFFECTECHO_H