godot/servers/audio/effects/audio_effect_amplify.h

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/*  audio_effect_amplify.h                                               */
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#ifndef AUDIOEFFECTAMPLIFY_H
#define AUDIOEFFECTAMPLIFY_H

#include "servers/audio/audio_effect.h"

class AudioEffectAmplify;

class AudioEffectAmplifyInstance : public AudioEffectInstance {
	GDCLASS(AudioEffectAmplifyInstance, AudioEffectInstance);
	friend class AudioEffectAmplify;
	Ref<AudioEffectAmplify> base;

	float mix_volume_db;

public:
	virtual void process(const AudioFrame *p_src_frames, AudioFrame *p_dst_frames, int p_frame_count) override;
};

class AudioEffectAmplify : public AudioEffect {
	GDCLASS(AudioEffectAmplify, AudioEffect);

	friend class AudioEffectAmplifyInstance;
	float volume_db;

protected:
	static void _bind_methods();

public:
	Ref<AudioEffectInstance> instantiate() override;
	void set_volume_db(float p_volume);
	float get_volume_db() const;

	AudioEffectAmplify();
};

#endif // AUDIOEFFECTAMPLIFY_H