OpenShot Audio Library | OpenShotAudio 0.4.0

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juce_IIRFilterAudioSource.cpp
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2022 - Raw Material Software Limited
6
7 JUCE is an open source library subject to commercial or open-source
8 licensing.
9
10 The code included in this file is provided under the terms of the ISC license
11 http://www.isc.org/downloads/software-support-policy/isc-license. Permission
12 To use, copy, modify, and/or distribute this software for any purpose with or
13 without fee is hereby granted provided that the above copyright notice and
14 this permission notice appear in all copies.
15
16 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
17 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
18 DISCLAIMED.
19
20 ==============================================================================
21*/
22
23 namespace juce
24{
25
26 IIRFilterAudioSource::IIRFilterAudioSource (AudioSource* const inputSource,
27 const bool deleteInputWhenDeleted)
28 : input (inputSource, deleteInputWhenDeleted)
29{
30 jassert (inputSource != nullptr);
31
32 for (int i = 2; --i >= 0;)
33 iirFilters.add (new IIRFilter());
34}
35
36 IIRFilterAudioSource::~IIRFilterAudioSource() {}
37
38//==============================================================================
39 void IIRFilterAudioSource::setCoefficients (const IIRCoefficients& newCoefficients)
40{
41 for (int i = iirFilters.size(); --i >= 0;)
42 iirFilters.getUnchecked (i)->setCoefficients (newCoefficients);
43}
44
45 void IIRFilterAudioSource::makeInactive()
46{
47 for (int i = iirFilters.size(); --i >= 0;)
48 iirFilters.getUnchecked (i)->makeInactive();
49}
50
51//==============================================================================
52 void IIRFilterAudioSource::prepareToPlay (int samplesPerBlockExpected, double sampleRate)
53{
54 input->prepareToPlay (samplesPerBlockExpected, sampleRate);
55
56 for (int i = iirFilters.size(); --i >= 0;)
57 iirFilters.getUnchecked (i)->reset();
58}
59
60 void IIRFilterAudioSource::releaseResources()
61{
62 input->releaseResources();
63}
64
65 void IIRFilterAudioSource::getNextAudioBlock (const AudioSourceChannelInfo& bufferToFill)
66{
67 input->getNextAudioBlock (bufferToFill);
68
69 const int numChannels = bufferToFill.buffer->getNumChannels();
70
71 while (numChannels > iirFilters.size())
72 iirFilters.add (new IIRFilter (*iirFilters.getUnchecked (0)));
73
74 for (int i = 0; i < numChannels; ++i)
75 iirFilters.getUnchecked (i)
76 ->processSamples (bufferToFill.buffer->getWritePointer (i, bufferToFill.startSample),
77 bufferToFill.numSamples);
78}
79
80} // namespace juce
juce::AudioBuffer::getWritePointer
Type * getWritePointer(int channelNumber) noexcept
Definition juce_AudioSampleBuffer.h:291
juce::AudioBuffer::getNumChannels
int getNumChannels() const noexcept
Definition juce_AudioSampleBuffer.h:236
juce::AudioSource
Definition juce_AudioSource.h:110
juce::IIRCoefficients
Definition juce_audio_basics/utilities/juce_IIRFilter.h:37
juce::IIRFilterAudioSource::makeInactive
void makeInactive()
Definition juce_IIRFilterAudioSource.cpp:45
juce::IIRFilterAudioSource::prepareToPlay
void prepareToPlay(int samplesPerBlockExpected, double sampleRate) override
Definition juce_IIRFilterAudioSource.cpp:52
juce::IIRFilterAudioSource::setCoefficients
void setCoefficients(const IIRCoefficients &newCoefficients)
Definition juce_IIRFilterAudioSource.cpp:39
juce::IIRFilterAudioSource::IIRFilterAudioSource
IIRFilterAudioSource(AudioSource *inputSource, bool deleteInputWhenDeleted)
Definition juce_IIRFilterAudioSource.cpp:26
juce::IIRFilterAudioSource::releaseResources
void releaseResources() override
Definition juce_IIRFilterAudioSource.cpp:60
juce::IIRFilterAudioSource::~IIRFilterAudioSource
~IIRFilterAudioSource() override
Definition juce_IIRFilterAudioSource.cpp:36
juce::IIRFilterAudioSource::getNextAudioBlock
void getNextAudioBlock(const AudioSourceChannelInfo &) override
Definition juce_IIRFilterAudioSource.cpp:65
juce::IIRFilter
Definition juce_audio_basics/utilities/juce_IIRFilter.h:232
juce::AudioSourceChannelInfo
Definition juce_AudioSource.h:33
juce::AudioSourceChannelInfo::numSamples
int numSamples
Definition juce_AudioSource.h:81
juce::AudioSourceChannelInfo::buffer
AudioBuffer< float > * buffer
Definition juce_AudioSource.h:73
juce::AudioSourceChannelInfo::startSample
int startSample
Definition juce_AudioSource.h:77