OpenShot Audio Library | OpenShotAudio: juce_ToneGeneratorAudioSource.cpp Source File

OpenShot Audio Library | OpenShotAudio 0.4.0

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juce_ToneGeneratorAudioSource.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
23namespace juce
24{
25
26ToneGeneratorAudioSource::ToneGeneratorAudioSource()
27 : frequency (1000.0),
28 sampleRate (44100.0),
29 currentPhase (0.0),
30 phasePerSample (0.0),
31 amplitude (0.5f)
32{
33}
34
35ToneGeneratorAudioSource::~ToneGeneratorAudioSource()
36{
37}
38
39//==============================================================================
40 void ToneGeneratorAudioSource::setAmplitude (const float newAmplitude)
41{
42 amplitude = newAmplitude;
43}
44
45 void ToneGeneratorAudioSource::setFrequency (const double newFrequencyHz)
46{
47 frequency = newFrequencyHz;
48 phasePerSample = 0.0;
49}
50
51//==============================================================================
52 void ToneGeneratorAudioSource::prepareToPlay (int /*samplesPerBlockExpected*/, double rate)
53{
54 currentPhase = 0.0;
55 phasePerSample = 0.0;
56 sampleRate = rate;
57}
58
59 void ToneGeneratorAudioSource::releaseResources()
60{
61}
62
63 void ToneGeneratorAudioSource::getNextAudioBlock (const AudioSourceChannelInfo& info)
64{
65 if (approximatelyEqual (phasePerSample, 0.0))
66 phasePerSample = MathConstants<double>::twoPi / (sampleRate / frequency);
67
68 for (int i = 0; i < info.numSamples; ++i)
69 {
70 const float sample = amplitude * (float) std::sin (currentPhase);
71 currentPhase += phasePerSample;
72
73 for (int j = info.buffer->getNumChannels(); --j >= 0;)
74 info.buffer->setSample (j, info.startSample + i, sample);
75 }
76}
77
78} // namespace juce
juce::AudioBuffer::getNumChannels
int getNumChannels() const noexcept
Definition juce_AudioSampleBuffer.h:236
juce::AudioBuffer::setSample
void setSample(int destChannel, int destSample, Type newValue) noexcept
Definition juce_AudioSampleBuffer.h:655
juce::ToneGeneratorAudioSource::prepareToPlay
void prepareToPlay(int samplesPerBlockExpected, double sampleRate) override
Definition juce_ToneGeneratorAudioSource.cpp:52
juce::ToneGeneratorAudioSource::releaseResources
void releaseResources() override
Definition juce_ToneGeneratorAudioSource.cpp:59
juce::ToneGeneratorAudioSource::setFrequency
void setFrequency(double newFrequencyHz)
Definition juce_ToneGeneratorAudioSource.cpp:45
juce::ToneGeneratorAudioSource::ToneGeneratorAudioSource
ToneGeneratorAudioSource()
Definition juce_ToneGeneratorAudioSource.cpp:26
juce::ToneGeneratorAudioSource::getNextAudioBlock
void getNextAudioBlock(const AudioSourceChannelInfo &) override
Definition juce_ToneGeneratorAudioSource.cpp:63
juce::ToneGeneratorAudioSource::setAmplitude
void setAmplitude(float newAmplitude)
Definition juce_ToneGeneratorAudioSource.cpp:40
juce::ToneGeneratorAudioSource::~ToneGeneratorAudioSource
~ToneGeneratorAudioSource() override
Definition juce_ToneGeneratorAudioSource.cpp:35
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
juce::MathConstants
Definition juce_MathsFunctions.h:139