OpenShot Library | OpenShotAudio 0.2.2
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A processing class that can perform IIR filtering on an audio signal, using the Transposed Direct Form II digital structure. More...
#include <juce_IIRFilter.h>
Public Types | |
using | NumericType = typename SampleTypeHelpers::ElementType< SampleType >::Type |
The NumericType is the underlying primitive type used by the SampleType (which could be either a primitive or vector) More... | |
using | CoefficientsPtr = typename Coefficients< NumericType >::Ptr |
A typedef for a ref-counted pointer to the coefficients object. More... | |
Public Member Functions | |
Filter () | |
Creates a filter. More... | |
Filter (CoefficientsPtr coefficientsToUse) | |
Creates a filter with a given set of coefficients. | |
Filter (const Filter &)=default | |
Filter (Filter &&)=default | |
Filter & | operator= (const Filter &)=default |
Filter & | operator= (Filter &&)=default |
void | reset () |
Resets the filter's processing pipeline, ready to start a new stream of data. More... | |
void | reset (SampleType resetToValue) |
Resets the filter's processing pipeline to a specific value. More... | |
void | prepare (const ProcessSpec &) noexcept |
Called before processing starts. | |
template<typename ProcessContext > | |
void | process (const ProcessContext &context) noexcept |
Processes a block of samples. More... | |
SampleType JUCE_VECTOR_CALLTYPE | processSample (SampleType sample) noexcept |
Processes a single sample, without any locking. More... | |
void | snapToZero () noexcept |
Ensure that the state variables are rounded to zero if the state variables are denormals. More... | |
Public Attributes | |
CoefficientsPtr | coefficients |
The coefficients of the IIR filter. More... | |
A processing class that can perform IIR filtering on an audio signal, using the Transposed Direct Form II digital structure.
If you need a lowpass, bandpass or highpass filter with fast modulation of its cutoff frequency, you might use the class StateVariableFilter instead, which is designed to prevent artefacts at parameter changes, instead of the class Filter.
Definition at line 58 of file juce_dsp/processors/juce_IIRFilter.h.
using juce::dsp::IIR::Filter< SampleType >::NumericType = typename SampleTypeHelpers::ElementType<SampleType>::Type |
The NumericType is the underlying primitive type used by the SampleType (which could be either a primitive or vector)
Definition at line 64 of file juce_dsp/processors/juce_IIRFilter.h.
using juce::dsp::IIR::Filter< SampleType >::CoefficientsPtr = typename Coefficients<NumericType>::Ptr |
A typedef for a ref-counted pointer to the coefficients object.
Definition at line 67 of file juce_dsp/processors/juce_IIRFilter.h.
juce::dsp::IIR::Filter< SampleType >::Filter | ( | ) |
Creates a filter.
Initially the filter is inactive, so will have no effect on samples that you process with it. You can modify the coefficients member to turn it into the type of filter needed.
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inline |
Resets the filter's processing pipeline, ready to start a new stream of data.
Note that this clears the processing state, but the type of filter and its coefficients aren't changed.
Definition at line 101 of file juce_dsp/processors/juce_IIRFilter.h.
References juce::dsp::IIR::Filter< SampleType >::reset().
Referenced by juce::dsp::IIR::Filter< SampleType >::reset().
void juce::dsp::IIR::Filter< SampleType >::reset | ( | SampleType | resetToValue | ) |
Resets the filter's processing pipeline to a specific value.
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inlinenoexcept |
Processes a block of samples.
Definition at line 114 of file juce_dsp/processors/juce_IIRFilter.h.
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noexcept |
Processes a single sample, without any locking.
Use this if you need processing of a single value.
Moreover, you might need the function snapToZero after a few calls to avoid potential denormalisation issues.
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noexcept |
Ensure that the state variables are rounded to zero if the state variables are denormals.
This is only needed if you are doing sample by sample processing.
CoefficientsPtr juce::dsp::IIR::Filter< SampleType >::coefficients |
The coefficients of the IIR filter.
It's up to the caller to ensure that these coefficients are modified in a thread-safe way.
If you change the order of the coefficients then you must call reset after modifying them.
Definition at line 93 of file juce_dsp/processors/juce_IIRFilter.h.
Referenced by juce::dsp::IIR::Coefficients< NumericType >::getRawCoefficients().