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77 lines
2.6 KiB
C++
77 lines
2.6 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library - "Jules' Utility Class Extensions"
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Copyright 2004-11 by Raw Material Software Ltd.
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------------------------------------------------------------------------------
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JUCE can be redistributed and/or modified under the terms of the GNU General
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Public License (Version 2), as published by the Free Software Foundation.
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A copy of the license is included in the JUCE distribution, or can be found
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online at www.gnu.org/licenses.
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.rawmaterialsoftware.com/juce for more information.
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==============================================================================
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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*/,
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double sampleRate_)
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{
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currentPhase = 0.0;
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phasePerSample = 0.0;
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sampleRate = sampleRate_;
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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 (phasePerSample == 0.0)
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phasePerSample = double_Pi * 2.0 / (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->getSampleData (j, info.startSample + i) = sample;
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}
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}
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