OpenShot Audio Library | OpenShotAudio 0.3.2
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juce_IIRFilterAudioSource.cpp
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2017 - ROLI Ltd.
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
23namespace juce
24{
25
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
37
38//==============================================================================
40{
41 for (int i = iirFilters.size(); --i >= 0;)
42 iirFilters.getUnchecked(i)->setCoefficients (newCoefficients);
43}
44
46{
47 for (int i = iirFilters.size(); --i >= 0;)
48 iirFilters.getUnchecked(i)->makeInactive();
49}
50
51//==============================================================================
53{
54 input->prepareToPlay (samplesPerBlockExpected, sampleRate);
55
56 for (int i = iirFilters.size(); --i >= 0;)
57 iirFilters.getUnchecked(i)->reset();
58}
59
61{
62 input->releaseResources();
63}
64
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
ElementType getUnchecked(int index) const
Definition juce_Array.h:252
int size() const noexcept
Definition juce_Array.h:215
void add(const ElementType &newElement)
Definition juce_Array.h:418
void prepareToPlay(int samplesPerBlockExpected, double sampleRate) override
void setCoefficients(const IIRCoefficients &newCoefficients)
IIRFilterAudioSource(AudioSource *inputSource, bool deleteInputWhenDeleted)
void getNextAudioBlock(const AudioSourceChannelInfo &) override