mirror of
https://github.com/juce-framework/JUCE.git
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121 lines
4.2 KiB
C++
121 lines
4.2 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE 6 technical preview.
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Copyright (c) 2020 - Raw Material Software Limited
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You may use this code under the terms of the GPL v3
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(see www.gnu.org/licenses).
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For this technical preview, this file is not subject to commercial licensing.
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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namespace dsp
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{
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//==============================================================================
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template <typename SampleType, typename InterpolationType>
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DelayLine<SampleType, InterpolationType>::DelayLine()
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: DelayLine (0)
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{
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}
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template <typename SampleType, typename InterpolationType>
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DelayLine<SampleType, InterpolationType>::DelayLine (int maximumDelayInSamples)
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{
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jassert (maximumDelayInSamples >= 0);
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totalSize = jmax (4, maximumDelayInSamples + 1);
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sampleRate = 44100.0;
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}
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//==============================================================================
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template <typename SampleType, typename InterpolationType>
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void DelayLine<SampleType, InterpolationType>::setDelay (SampleType newDelayInSamples)
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{
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auto upperLimit = (SampleType) (totalSize - 1);
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jassert (isPositiveAndNotGreaterThan (newDelayInSamples, upperLimit));
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delay = jlimit ((SampleType) 0, upperLimit, newDelayInSamples);
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delayInt = static_cast<int> (std::floor (delay));
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delayFrac = delay - (SampleType) delayInt;
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updateInternalVariables();
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}
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template <typename SampleType, typename InterpolationType>
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SampleType DelayLine<SampleType, InterpolationType>::getDelay() const
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{
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return delay;
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}
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//==============================================================================
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template <typename SampleType, typename InterpolationType>
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void DelayLine<SampleType, InterpolationType>::prepare (const ProcessSpec& spec)
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{
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jassert (spec.numChannels > 0);
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bufferData.setSize ((int) spec.numChannels, totalSize, false, false, true);
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writePos.resize (spec.numChannels);
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readPos.resize (spec.numChannels);
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v.resize (spec.numChannels);
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sampleRate = spec.sampleRate;
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reset();
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}
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template <typename SampleType, typename InterpolationType>
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void DelayLine<SampleType, InterpolationType>::reset()
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{
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for (auto vec : { &writePos, &readPos })
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std::fill (vec->begin(), vec->end(), 0);
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std::fill (v.begin(), v.end(), static_cast<SampleType> (0));
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bufferData.clear();
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}
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//==============================================================================
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template <typename SampleType, typename InterpolationType>
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void DelayLine<SampleType, InterpolationType>::pushSample (int channel, SampleType sample)
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{
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bufferData.setSample (channel, writePos[(size_t) channel], sample);
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writePos[(size_t) channel] = (writePos[(size_t) channel] + totalSize - 1) % totalSize;
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}
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template <typename SampleType, typename InterpolationType>
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SampleType DelayLine<SampleType, InterpolationType>::popSample (int channel, SampleType delayInSamples, bool updateReadPointer)
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{
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if (delayInSamples >= 0)
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setDelay(delayInSamples);
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auto result = interpolateSample (channel);
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if (updateReadPointer)
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readPos[(size_t) channel] = (readPos[(size_t) channel] + totalSize - 1) % totalSize;
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return result;
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}
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//==============================================================================
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template class DelayLine<float, DelayLineInterpolationTypes::None>;
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template class DelayLine<double, DelayLineInterpolationTypes::None>;
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template class DelayLine<float, DelayLineInterpolationTypes::Linear>;
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template class DelayLine<double, DelayLineInterpolationTypes::Linear>;
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template class DelayLine<float, DelayLineInterpolationTypes::Lagrange3rd>;
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template class DelayLine<double, DelayLineInterpolationTypes::Lagrange3rd>;
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template class DelayLine<float, DelayLineInterpolationTypes::Thiran>;
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template class DelayLine<double, DelayLineInterpolationTypes::Thiran>;
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} // namespace dsp
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} // namespace juce
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