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90 lines
3 KiB
C++
90 lines
3 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE framework.
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Copyright (c) Raw Material Software Limited
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JUCE is an open source framework subject to commercial or open source
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licensing.
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By downloading, installing, or using the JUCE framework, or combining the
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JUCE framework with any other source code, object code, content or any other
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copyrightable work, you agree to the terms of the JUCE End User Licence
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Agreement, and all incorporated terms including the JUCE Privacy Policy and
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the JUCE Website Terms of Service, as applicable, which will bind you. If you
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do not agree to the terms of these agreements, we will not license the JUCE
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framework to you, and you must discontinue the installation or download
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process and cease use of the JUCE framework.
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JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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JUCE Privacy Policy: https://juce.com/juce-privacy-policy
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JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
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Or:
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You may also use this code under the terms of the AGPLv3:
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https://www.gnu.org/licenses/agpl-3.0.en.html
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THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
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MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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ToneGeneratorAudioSource::ToneGeneratorAudioSource()
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: frequency (1000.0),
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sampleRate (44100.0),
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currentPhase (0.0),
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phasePerSample (0.0),
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amplitude (0.5f)
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{
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}
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ToneGeneratorAudioSource::~ToneGeneratorAudioSource()
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{
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}
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//==============================================================================
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void ToneGeneratorAudioSource::setAmplitude (const float newAmplitude)
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{
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amplitude = newAmplitude;
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}
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void ToneGeneratorAudioSource::setFrequency (const double newFrequencyHz)
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{
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frequency = newFrequencyHz;
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phasePerSample = 0.0;
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}
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//==============================================================================
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void ToneGeneratorAudioSource::prepareToPlay (int /*samplesPerBlockExpected*/, double rate)
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{
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currentPhase = 0.0;
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phasePerSample = 0.0;
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sampleRate = rate;
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}
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void ToneGeneratorAudioSource::releaseResources()
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{
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}
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void ToneGeneratorAudioSource::getNextAudioBlock (const AudioSourceChannelInfo& info)
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{
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if (approximatelyEqual (phasePerSample, 0.0))
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phasePerSample = MathConstants<double>::twoPi / (sampleRate / frequency);
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for (int i = 0; i < info.numSamples; ++i)
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{
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const float sample = amplitude * (float) std::sin (currentPhase);
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currentPhase += phasePerSample;
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for (int j = info.buffer->getNumChannels(); --j >= 0;)
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info.buffer->setSample (j, info.startSample + i, sample);
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}
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}
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} // namespace juce
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