1 files changed, 111 insertions, 0 deletions
diff --git a/servers/audio/effects/reverb.h b/servers/audio/effects/reverb.h
new file mode 100644
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+++ b/servers/audio/effects/reverb.h
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+//
+// C++ Interface: reverb
+//
+// Description:
+//
+//
+// Author: Juan Linietsky <reduzio@gmail.com>, (C) 2006
+//
+// Copyright: See COPYING file that comes with this distribution
+//
+//
+#ifndef REVERB_H
+#define REVERB_H
+
+#include "typedefs.h"
+#include "os/memory.h"
+#include "audio_frame.h"
+
+class Reverb {
+public:
+	enum {
+		INPUT_BUFFER_MAX_SIZE=1024,
+
+	};
+private:
+	enum {
+
+		MAX_COMBS=8,
+		MAX_ALLPASS=4,
+		MAX_ECHO_MS=500
+
+	};
+
+
+
+	static const float comb_tunings[MAX_COMBS];
+	static const float allpass_tunings[MAX_ALLPASS];
+
+	struct Comb {
+
+		int size;
+		float *buffer;
+		float feedback;
+		float damp; //lowpass
+		float damp_h; //history
+		int pos;
+		int extra_spread_frames;
+
+		Comb() { size=0; buffer=0; feedback=0; damp_h=0; pos=0; }
+	};
+
+	struct AllPass {
+
+		int size;
+		float *buffer;
+		int pos;
+		int extra_spread_frames;
+		AllPass() { size=0; buffer=0; pos=0; }
+	};
+
+	Comb comb[MAX_COMBS];
+	AllPass allpass[MAX_ALLPASS];
+	float *input_buffer;
+	float *echo_buffer;
+	int echo_buffer_size;
+	int echo_buffer_pos;
+
+	float hpf_h1,hpf_h2;
+
+
+	struct Parameters {
+
+		float room_size;
+		float damp;
+		float wet;
+		float dry;
+		float mix_rate;
+		float extra_spread_base;
+		float extra_spread;
+		float predelay;
+		float predelay_fb;
+		float hpf;
+	} params;
+
+	void configure_buffers();
+	void update_parameters();
+	void clear_buffers();
+public:
+
+	void set_room_size(float p_size);
+	void set_damp(float p_damp);
+	void set_wet(float p_wet);
+	void set_dry(float p_dry);
+	void set_predelay(float p_predelay); // in ms
+	void set_predelay_feedback(float p_predelay_fb); // in ms
+	void set_highpass(float p_frq);
+	void set_mix_rate(float p_mix_rate);
+	void set_extra_spread(float p_spread);
+	void set_extra_spread_base(float p_sec);
+
+	void process(float *p_src,float *p_dst,int p_frames);
+
+	Reverb();
+
+	~Reverb();
+
+};
+
+
+
+#endif