mirror of
https://github.com/juce-framework/JUCE.git
synced 2026-01-10 23:44:24 +00:00
364 lines
14 KiB
C++
364 lines
14 KiB
C++
/*
|
|
==============================================================================
|
|
|
|
This file is part of the JUCE 7 technical preview.
|
|
Copyright (c) 2022 - Raw Material Software Limited
|
|
|
|
You may use this code under the terms of the GPL v3
|
|
(see www.gnu.org/licenses).
|
|
|
|
For the technical preview this file cannot be licensed commercially.
|
|
|
|
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
|
|
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
|
|
DISCLAIMED.
|
|
|
|
==============================================================================
|
|
*/
|
|
|
|
namespace juce
|
|
{
|
|
namespace dsp
|
|
{
|
|
|
|
//==============================================================================
|
|
template <typename SampleType>
|
|
DryWetMixer<SampleType>::DryWetMixer()
|
|
: DryWetMixer (0)
|
|
{
|
|
}
|
|
|
|
template <typename SampleType>
|
|
DryWetMixer<SampleType>::DryWetMixer (int maximumWetLatencyInSamplesIn)
|
|
: dryDelayLine (maximumWetLatencyInSamplesIn),
|
|
maximumWetLatencyInSamples (maximumWetLatencyInSamplesIn)
|
|
{
|
|
dryDelayLine.setDelay (0);
|
|
|
|
update();
|
|
reset();
|
|
}
|
|
|
|
//==============================================================================
|
|
template <typename SampleType>
|
|
void DryWetMixer<SampleType>::setMixingRule (MixingRule newRule)
|
|
{
|
|
currentMixingRule = newRule;
|
|
update();
|
|
}
|
|
|
|
template <typename SampleType>
|
|
void DryWetMixer<SampleType>::setWetMixProportion (SampleType newWetMixProportion)
|
|
{
|
|
jassert (isPositiveAndNotGreaterThan (newWetMixProportion, 1.0));
|
|
|
|
mix = jlimit (static_cast<SampleType> (0.0), static_cast<SampleType> (1.0), newWetMixProportion);
|
|
update();
|
|
}
|
|
|
|
template <typename SampleType>
|
|
void DryWetMixer<SampleType>::setWetLatency (SampleType wetLatencySamples)
|
|
{
|
|
dryDelayLine.setDelay (wetLatencySamples);
|
|
}
|
|
|
|
//==============================================================================
|
|
template <typename SampleType>
|
|
void DryWetMixer<SampleType>::prepare (const ProcessSpec& spec)
|
|
{
|
|
jassert (spec.sampleRate > 0);
|
|
jassert (spec.numChannels > 0);
|
|
|
|
sampleRate = spec.sampleRate;
|
|
|
|
dryDelayLine.prepare (spec);
|
|
bufferDry.setSize ((int) spec.numChannels, (int) spec.maximumBlockSize, false, false, true);
|
|
|
|
update();
|
|
reset();
|
|
}
|
|
|
|
template <typename SampleType>
|
|
void DryWetMixer<SampleType>::reset()
|
|
{
|
|
dryVolume.reset (sampleRate, 0.05);
|
|
wetVolume.reset (sampleRate, 0.05);
|
|
|
|
dryDelayLine.reset();
|
|
|
|
fifo = SingleThreadedAbstractFifo (nextPowerOfTwo (bufferDry.getNumSamples()));
|
|
bufferDry.setSize (bufferDry.getNumChannels(), fifo.getSize(), false, false, true);
|
|
}
|
|
|
|
//==============================================================================
|
|
template <typename SampleType>
|
|
void DryWetMixer<SampleType>::pushDrySamples (const AudioBlock<const SampleType> drySamples)
|
|
{
|
|
jassert (drySamples.getNumChannels() <= (size_t) bufferDry.getNumChannels());
|
|
jassert (drySamples.getNumSamples() <= (size_t) fifo.getRemainingSpace());
|
|
|
|
auto offset = 0;
|
|
|
|
for (const auto& range : fifo.write ((int) drySamples.getNumSamples()))
|
|
{
|
|
if (range.getLength() == 0)
|
|
continue;
|
|
|
|
auto block = AudioBlock<SampleType> (bufferDry).getSubsetChannelBlock (0, drySamples.getNumChannels())
|
|
.getSubBlock ((size_t) range.getStart(), (size_t) range.getLength());
|
|
|
|
auto inputBlock = drySamples.getSubBlock ((size_t) offset, (size_t) range.getLength());
|
|
|
|
if (maximumWetLatencyInSamples == 0)
|
|
block.copyFrom (inputBlock);
|
|
else
|
|
dryDelayLine.process (ProcessContextNonReplacing<SampleType> (inputBlock, block));
|
|
|
|
offset += range.getLength();
|
|
}
|
|
}
|
|
|
|
template <typename SampleType>
|
|
void DryWetMixer<SampleType>::mixWetSamples (AudioBlock<SampleType> inOutBlock)
|
|
{
|
|
inOutBlock.multiplyBy (wetVolume);
|
|
|
|
jassert (inOutBlock.getNumSamples() <= (size_t) fifo.getNumReadable());
|
|
|
|
auto offset = 0;
|
|
|
|
for (const auto& range : fifo.read ((int) inOutBlock.getNumSamples()))
|
|
{
|
|
if (range.getLength() == 0)
|
|
continue;
|
|
|
|
auto block = AudioBlock<SampleType> (bufferDry).getSubsetChannelBlock (0, inOutBlock.getNumChannels())
|
|
.getSubBlock ((size_t) range.getStart(), (size_t) range.getLength());
|
|
block.multiplyBy (dryVolume);
|
|
inOutBlock.getSubBlock ((size_t) offset).add (block);
|
|
|
|
offset += range.getLength();
|
|
}
|
|
}
|
|
|
|
//==============================================================================
|
|
template <typename SampleType>
|
|
void DryWetMixer<SampleType>::update()
|
|
{
|
|
SampleType dryValue, wetValue;
|
|
|
|
switch (currentMixingRule)
|
|
{
|
|
case MixingRule::balanced:
|
|
dryValue = static_cast<SampleType> (2.0) * jmin (static_cast<SampleType> (0.5), static_cast<SampleType> (1.0) - mix);
|
|
wetValue = static_cast<SampleType> (2.0) * jmin (static_cast<SampleType> (0.5), mix);
|
|
break;
|
|
|
|
case MixingRule::linear:
|
|
dryValue = static_cast<SampleType> (1.0) - mix;
|
|
wetValue = mix;
|
|
break;
|
|
|
|
case MixingRule::sin3dB:
|
|
dryValue = static_cast<SampleType> (std::sin (0.5 * MathConstants<double>::pi * (1.0 - mix)));
|
|
wetValue = static_cast<SampleType> (std::sin (0.5 * MathConstants<double>::pi * mix));
|
|
break;
|
|
|
|
case MixingRule::sin4p5dB:
|
|
dryValue = static_cast<SampleType> (std::pow (std::sin (0.5 * MathConstants<double>::pi * (1.0 - mix)), 1.5));
|
|
wetValue = static_cast<SampleType> (std::pow (std::sin (0.5 * MathConstants<double>::pi * mix), 1.5));
|
|
break;
|
|
|
|
case MixingRule::sin6dB:
|
|
dryValue = static_cast<SampleType> (std::pow (std::sin (0.5 * MathConstants<double>::pi * (1.0 - mix)), 2.0));
|
|
wetValue = static_cast<SampleType> (std::pow (std::sin (0.5 * MathConstants<double>::pi * mix), 2.0));
|
|
break;
|
|
|
|
case MixingRule::squareRoot3dB:
|
|
dryValue = std::sqrt (static_cast<SampleType> (1.0) - mix);
|
|
wetValue = std::sqrt (mix);
|
|
break;
|
|
|
|
case MixingRule::squareRoot4p5dB:
|
|
dryValue = static_cast<SampleType> (std::pow (std::sqrt (1.0 - mix), 1.5));
|
|
wetValue = static_cast<SampleType> (std::pow (std::sqrt (mix), 1.5));
|
|
break;
|
|
|
|
default:
|
|
dryValue = jmin (static_cast<SampleType> (0.5), static_cast<SampleType> (1.0) - mix);
|
|
wetValue = jmin (static_cast<SampleType> (0.5), mix);
|
|
break;
|
|
}
|
|
|
|
dryVolume.setTargetValue (dryValue);
|
|
wetVolume.setTargetValue (wetValue);
|
|
}
|
|
|
|
//==============================================================================
|
|
template class DryWetMixer<float>;
|
|
template class DryWetMixer<double>;
|
|
|
|
|
|
//==============================================================================
|
|
//==============================================================================
|
|
#if JUCE_UNIT_TESTS
|
|
|
|
struct DryWetMixerTests : public UnitTest
|
|
{
|
|
DryWetMixerTests() : UnitTest ("DryWetMixer", UnitTestCategories::dsp) {}
|
|
|
|
enum class Kind { down, up };
|
|
|
|
static auto getRampBuffer (ProcessSpec spec, Kind kind)
|
|
{
|
|
AudioBuffer<float> buffer ((int) spec.numChannels, (int) spec.maximumBlockSize);
|
|
|
|
for (uint32_t sample = 0; sample < spec.maximumBlockSize; ++sample)
|
|
{
|
|
for (uint32_t channel = 0; channel < spec.numChannels; ++channel)
|
|
{
|
|
const auto ramp = kind == Kind::up ? sample : spec.maximumBlockSize - sample;
|
|
|
|
buffer.setSample ((int) channel,
|
|
(int) sample,
|
|
jmap ((float) ramp, 0.0f, (float) spec.maximumBlockSize, 0.0f, 1.0f));
|
|
}
|
|
}
|
|
|
|
return buffer;
|
|
}
|
|
|
|
void runTest() override
|
|
{
|
|
constexpr ProcessSpec spec { 44100.0, 512, 2 };
|
|
constexpr auto numBlocks = 5;
|
|
|
|
const auto wetBuffer = getRampBuffer (spec, Kind::up);
|
|
const auto dryBuffer = getRampBuffer (spec, Kind::down);
|
|
|
|
for (auto maxLatency : { 0, 100, 200, 512 })
|
|
{
|
|
beginTest ("Mixer can push multiple small buffers");
|
|
{
|
|
DryWetMixer<float> mixer (maxLatency);
|
|
mixer.setWetMixProportion (0.5f);
|
|
mixer.prepare (spec);
|
|
|
|
for (auto block = 0; block < numBlocks; ++block)
|
|
{
|
|
// Push samples one-by-one
|
|
for (uint32_t sample = 0; sample < spec.maximumBlockSize; ++sample)
|
|
mixer.pushDrySamples (AudioBlock<const float> (dryBuffer).getSubBlock (sample, 1));
|
|
|
|
// Mix wet samples in one go
|
|
auto outputBlock = wetBuffer;
|
|
mixer.mixWetSamples ({ outputBlock });
|
|
|
|
// The output block should contain the wet and dry samples averaged
|
|
for (uint32_t sample = 0; sample < spec.maximumBlockSize; ++sample)
|
|
{
|
|
for (uint32_t channel = 0; channel < spec.numChannels; ++channel)
|
|
{
|
|
const auto outputValue = outputBlock.getSample ((int) channel, (int) sample);
|
|
expectWithinAbsoluteError (outputValue, 0.5f, 0.0001f);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
beginTest ("Mixer can pop multiple small buffers");
|
|
{
|
|
DryWetMixer<float> mixer (maxLatency);
|
|
mixer.setWetMixProportion (0.5f);
|
|
mixer.prepare (spec);
|
|
|
|
for (auto block = 0; block < numBlocks; ++block)
|
|
{
|
|
// Push samples in one go
|
|
mixer.pushDrySamples ({ dryBuffer });
|
|
|
|
// Process wet samples one-by-one
|
|
for (uint32_t sample = 0; sample < spec.maximumBlockSize; ++sample)
|
|
{
|
|
AudioBuffer<float> outputBlock ((int) spec.numChannels, 1);
|
|
AudioBlock<const float> (wetBuffer).getSubBlock (sample, 1).copyTo (outputBlock);
|
|
mixer.mixWetSamples ({ outputBlock });
|
|
|
|
// The output block should contain the wet and dry samples averaged
|
|
for (uint32_t channel = 0; channel < spec.numChannels; ++channel)
|
|
{
|
|
const auto outputValue = outputBlock.getSample ((int) channel, 0);
|
|
expectWithinAbsoluteError (outputValue, 0.5f, 0.0001f);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
beginTest ("Mixer can push and pop multiple small buffers");
|
|
{
|
|
DryWetMixer<float> mixer (maxLatency);
|
|
mixer.setWetMixProportion (0.5f);
|
|
mixer.prepare (spec);
|
|
|
|
for (auto block = 0; block < numBlocks; ++block)
|
|
{
|
|
// Push dry samples and process wet samples one-by-one
|
|
for (uint32_t sample = 0; sample < spec.maximumBlockSize; ++sample)
|
|
{
|
|
mixer.pushDrySamples (AudioBlock<const float> (dryBuffer).getSubBlock (sample, 1));
|
|
|
|
AudioBuffer<float> outputBlock ((int) spec.numChannels, 1);
|
|
AudioBlock<const float> (wetBuffer).getSubBlock (sample, 1).copyTo (outputBlock);
|
|
mixer.mixWetSamples ({ outputBlock });
|
|
|
|
// The output block should contain the wet and dry samples averaged
|
|
for (uint32_t channel = 0; channel < spec.numChannels; ++channel)
|
|
{
|
|
const auto outputValue = outputBlock.getSample ((int) channel, 0);
|
|
expectWithinAbsoluteError (outputValue, 0.5f, 0.0001f);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
beginTest ("Mixer can push and pop full-sized blocks after encountering a shorter block");
|
|
{
|
|
DryWetMixer<float> mixer (maxLatency);
|
|
mixer.setWetMixProportion (0.5f);
|
|
mixer.prepare (spec);
|
|
|
|
constexpr auto shortBlockLength = spec.maximumBlockSize / 2;
|
|
AudioBuffer<float> shortBlock (spec.numChannels, shortBlockLength);
|
|
mixer.pushDrySamples (AudioBlock<const float> (dryBuffer).getSubBlock (shortBlockLength));
|
|
mixer.mixWetSamples ({ shortBlock });
|
|
|
|
for (auto block = 0; block < numBlocks; ++block)
|
|
{
|
|
// Push a full block of dry samples
|
|
mixer.pushDrySamples ({ dryBuffer });
|
|
|
|
// Mix a full block of wet samples
|
|
auto outputBlock = wetBuffer;
|
|
mixer.mixWetSamples ({ outputBlock });
|
|
|
|
// The output block should contain the wet and dry samples averaged
|
|
for (uint32_t sample = 0; sample < spec.maximumBlockSize; ++sample)
|
|
{
|
|
for (uint32_t channel = 0; channel < spec.numChannels; ++channel)
|
|
{
|
|
const auto outputValue = outputBlock.getSample ((int) channel, (int) sample);
|
|
expectWithinAbsoluteError (outputValue, 0.5f, 0.0001f);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
static const DryWetMixerTests dryWetMixerTests;
|
|
|
|
#endif
|
|
|
|
} // namespace dsp
|
|
} // namespace juce
|