filter_design.h

// Copyright (C) 2025 Alexandre St-Onge
// SPDX-License-Identifier: MIT
#pragma once
 
#include "sffdn/filter.h"
#include "sffdn/filterbank.h"
#include "sffdn/types.h"
 
#include <array>
#include <cstdint>
#include <numbers>
#include <optional>
#include <span>
#include <variant>
#include <vector>
 
namespace sfFDN
{
 
std::pair<float, float> DesignTwoBandAbsorption(const TwoBandFilterOptions& options);
 
std::array<FilterCoefficients, 2> DesignThreeBandAbsorption(const ThreeBandFilterOptions& options);
 
std::array<FilterCoefficients, 11> DesignTenBandAbsorption(const TenBandFilterOptions& options);
 
std::array<FilterCoefficients, 11> DesignGraphicEQ(const GraphicEQOptions& options);
 
std::unique_ptr<AudioProcessor> CreateAttenuationFilter(const attenuation_filter_variant_t& options);
 
std::unique_ptr<AudioProcessor> CreateAttenuationFilterBank(const AttenuationFilterBankOptions& options);
 
std::unique_ptr<AudioProcessor> CreateAttenuationFilterBank(const attenuation_filter_variant_t& options,
                                                            std::span<const float> delays);
 
} // namespace sfFDN