107 lines
2.8 KiB
C++
107 lines
2.8 KiB
C++
/*******************************************************************************
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* Copyright 2022 Marcos Perez Gonzalez
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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******************************************************************************/
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#pragma once
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/**
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* @file Equalizer.h
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* @ingroup fx
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* The Equalizer class.
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*/
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#include <memory>
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#include <vector>
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#include "ISound.h"
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#include "ImpulseResponse.h"
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AUD_NAMESPACE_BEGIN
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class Buffer;
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class ImpulseResponse;
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/**
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* This class represents a sound that can be modified depending on a given impulse response.
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*/
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class AUD_API Equalizer : public ISound
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{
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private:
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/**
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* A pointer to the imput sound.
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*/
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std::shared_ptr<ISound> m_sound;
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/**
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* Local definition of Equalizer
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*/
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std::shared_ptr<Buffer> m_bufEQ;
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/**
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* A pointer to the impulse response.
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*/
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std::shared_ptr<ImpulseResponse> m_impulseResponse;
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/**
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* delete copy constructor and operator=
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*/
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Equalizer(const Equalizer&) = delete;
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Equalizer& operator=(const Equalizer&) = delete;
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/**
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* Create ImpulseResponse from the definition in the Buffer,
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* using at the end a minimum phase change
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*/
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std::shared_ptr<ImpulseResponse> createImpulseResponse();
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/**
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* Create an Impulse Response with minimum phase distortion using Homomorphic
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* The input is an Impulse Response
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*/
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std::shared_ptr<Buffer> minimumPhaseFilterHomomorphic(std::shared_ptr<Buffer> original, int lOriginal, int lWork);
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/**
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* Create an Impulse Response with minimum phase distortion using Hilbert
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* The input is an Impulse Response
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*/
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std::shared_ptr<Buffer> minimumPhaseFilterHilbert(std::shared_ptr<Buffer> original, int lOriginal, int lWork);
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public:
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/**
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* Creates a new Equalizer.
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* \param sound The sound that will be equalized
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*/
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Equalizer(std::shared_ptr<ISound> sound, std::shared_ptr<Buffer> bufEQ, int externalSizeEq, float maxFreqEq, int sizeConversion);
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virtual ~Equalizer();
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virtual std::shared_ptr<IReader> createReader();
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/*
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* Length of the external equalizer definition. It must be the number of "float" positions of the Buffer
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*/
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int external_size_eq;
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/*
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* Length of the internal equalizer definition
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*/
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int filter_length;
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/*
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* Maximum frequency used in the equalizer definition
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*/
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float maxFreqEq;
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};
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AUD_NAMESPACE_END
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