initial commit, 4.5 stable

servers/audio/effects/audio_effect_eq.h

@@ -0,0 +1,98 @@
+/**************************************************************************/
+/*  audio_effect_eq.h                                                     */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#pragma once
+
+#include "servers/audio/audio_effect.h"
+#include "servers/audio/effects/eq_filter.h"
+
+class AudioEffectEQ;
+
+class AudioEffectEQInstance : public AudioEffectInstance {
+	GDCLASS(AudioEffectEQInstance, AudioEffectInstance);
+	friend class AudioEffectEQ;
+	Ref<AudioEffectEQ> base;
+
+	Vector<EQ::BandProcess> bands[2];
+	Vector<float> gains;
+
+public:
+	virtual void process(const AudioFrame *p_src_frames, AudioFrame *p_dst_frames, int p_frame_count) override;
+};
+
+class AudioEffectEQ : public AudioEffect {
+	GDCLASS(AudioEffectEQ, AudioEffect);
+
+	friend class AudioEffectEQInstance;
+
+	EQ eq;
+	Vector<float> gain;
+	HashMap<StringName, int> prop_band_map;
+	Vector<String> band_names;
+
+protected:
+	bool _set(const StringName &p_name, const Variant &p_value);
+	bool _get(const StringName &p_name, Variant &r_ret) const;
+	void _get_property_list(List<PropertyInfo> *p_list) const;
+
+	static void _bind_methods();
+
+public:
+	Ref<AudioEffectInstance> instantiate() override;
+	void set_band_gain_db(int p_band, float p_volume);
+	float get_band_gain_db(int p_band) const;
+	int get_band_count() const;
+
+	AudioEffectEQ(EQ::Preset p_preset = EQ::PRESET_6_BANDS);
+};
+
+class AudioEffectEQ6 : public AudioEffectEQ {
+	GDCLASS(AudioEffectEQ6, AudioEffectEQ);
+
+public:
+	AudioEffectEQ6() :
+			AudioEffectEQ(EQ::PRESET_6_BANDS) {}
+};
+
+class AudioEffectEQ10 : public AudioEffectEQ {
+	GDCLASS(AudioEffectEQ10, AudioEffectEQ);
+
+public:
+	AudioEffectEQ10() :
+			AudioEffectEQ(EQ::PRESET_10_BANDS) {}
+};
+
+class AudioEffectEQ21 : public AudioEffectEQ {
+	GDCLASS(AudioEffectEQ21, AudioEffectEQ);
+
+public:
+	AudioEffectEQ21() :
+			AudioEffectEQ(EQ::PRESET_21_BANDS) {}
+};