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juicysfplugin/modules/juce_audio_basics/utilities/juce_LagrangeInterpolator.cpp

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fix macOS build (following Projucer changes made in Windows, which removed /Applications/JUCE/modules from its headers). move JUCE headers under source control, so that Windows and macOS can both build against same version of JUCE. remove AUv3 target (I think it's an iOS thing, so it will never work with this macOS fluidsynth dylib).
2018-06-17 20:34:53 +08:00
/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2017 - ROLI Ltd.
JUCE is an open source library subject to commercial or open-source
licensing.
The code included in this file is provided under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license. Permission
To use, copy, modify, and/or distribute this software for any purpose with or
without fee is hereby granted provided that the above copyright notice and
this permission notice appear in all copies.
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
{
static forcedinline void pushInterpolationSample (float* lastInputSamples, float newValue) noexcept
{
lastInputSamples[4] = lastInputSamples[3];
lastInputSamples[3] = lastInputSamples[2];
lastInputSamples[2] = lastInputSamples[1];
lastInputSamples[1] = lastInputSamples[0];
lastInputSamples[0] = newValue;
}
static forcedinline void pushInterpolationSamples (float* lastInputSamples, const float* input, int numOut) noexcept
{
if (numOut >= 5)
{
for (int i = 0; i < 5; ++i)
lastInputSamples[i] = input[--numOut];
}
else
{
for (int i = 0; i < numOut; ++i)
pushInterpolationSample (lastInputSamples, input[i]);
}
}
static forcedinline void pushInterpolationSamples (float* lastInputSamples, const float* input,
int numOut, int available, int wrapAround) noexcept
{
if (numOut >= 5)
{
if (available >= 5)
{
for (int i = 0; i < 5; ++i)
lastInputSamples[i] = input[--numOut];
}
else
{
for (int i = 0; i < available; ++i)
lastInputSamples[i] = input[--numOut];
if (wrapAround > 0)
{
numOut -= wrapAround;
for (int i = available; i < 5; ++i)
lastInputSamples[i] = input[--numOut];
}
else
{
for (int i = available; i < 5; ++i)
lastInputSamples[i] = 0.0f;
}
}
}
else
{
if (numOut > available)
{
for (int i = 0; i < available; ++i)
pushInterpolationSample (lastInputSamples, input[i]);
if (wrapAround > 0)
{
for (int i = 0; i < numOut - available; ++i)
pushInterpolationSample (lastInputSamples, input[i + available - wrapAround]);
}
else
{
for (int i = 0; i < numOut - available; ++i)
pushInterpolationSample (lastInputSamples, 0);
}
}
else
{
for (int i = 0; i < numOut; ++i)
pushInterpolationSample (lastInputSamples, input[i]);
}
}
}
template <typename InterpolatorType>
static int interpolate (float* lastInputSamples, double& subSamplePos, double actualRatio,
const float* in, float* out, int numOut) noexcept
{
auto pos = subSamplePos;
if (actualRatio == 1.0 && pos == 1.0)
{
memcpy (out, in, (size_t) numOut * sizeof (float));
pushInterpolationSamples (lastInputSamples, in, numOut);
return numOut;
}
int numUsed = 0;
while (numOut > 0)
{
while (pos >= 1.0)
{
pushInterpolationSample (lastInputSamples, in[numUsed++]);
pos -= 1.0;
}
*out++ = InterpolatorType::valueAtOffset (lastInputSamples, (float) pos);
pos += actualRatio;
--numOut;
}
subSamplePos = pos;
return numUsed;
}
template <typename InterpolatorType>
static int interpolate (float* lastInputSamples, double& subSamplePos, double actualRatio,
const float* in, float* out, int numOut, int available, int wrap) noexcept
{
if (actualRatio == 1.0)
{
if (available >= numOut)
{
memcpy (out, in, (size_t) numOut * sizeof (float));
pushInterpolationSamples (lastInputSamples, in, numOut, available, wrap);
}
else
{
memcpy (out, in, (size_t) available * sizeof (float));
pushInterpolationSamples (lastInputSamples, in, numOut, available, wrap);
if (wrap > 0)
{
memcpy (out + available, in + available - wrap, (size_t) (numOut - available) * sizeof (float));
pushInterpolationSamples (lastInputSamples, in, numOut, available, wrap);
}
else
{
for (int i = 0; i < numOut - available; ++i)
pushInterpolationSample (lastInputSamples, 0);
}
}
return numOut;
}
auto originalIn = in;
auto pos = subSamplePos;
bool exceeded = false;
if (actualRatio < 1.0)
{
for (int i = numOut; --i >= 0;)
{
if (pos >= 1.0)
{
if (exceeded)
{
pushInterpolationSample (lastInputSamples, 0);
}
else
{
pushInterpolationSample (lastInputSamples, *in++);
if (--available <= 0)
{
if (wrap > 0)
{
in -= wrap;
available += wrap;
}
else
{
exceeded = true;
}
}
}
pos -= 1.0;
}
*out++ = InterpolatorType::valueAtOffset (lastInputSamples, (float) pos);
pos += actualRatio;
}
}
else
{
for (int i = numOut; --i >= 0;)
{
while (pos < actualRatio)
{
if (exceeded)
{
pushInterpolationSample (lastInputSamples, 0);
}
else
{
pushInterpolationSample (lastInputSamples, *in++);
if (--available <= 0)
{
if (wrap > 0)
{
in -= wrap;
available += wrap;
}
else
{
exceeded = true;
}
}
}
pos += 1.0;
}
pos -= actualRatio;
*out++ = InterpolatorType::valueAtOffset (lastInputSamples, jmax (0.0f, 1.0f - (float) pos));
}
}
subSamplePos = pos;
upgrade to JUCE 5.4.3. Remove (probably) unused JUCE modules. Remove VST2 target (it's been end-of-life'd by Steinberg and by JUCE)
2019-06-23 03:41:38 +08:00
if (wrap == 0)
return (int) (in - originalIn);
fix macOS build (following Projucer changes made in Windows, which removed /Applications/JUCE/modules from its headers). move JUCE headers under source control, so that Windows and macOS can both build against same version of JUCE. remove AUv3 target (I think it's an iOS thing, so it will never work with this macOS fluidsynth dylib).
2018-06-17 20:34:53 +08:00
return ((int) (in - originalIn) + wrap) % wrap;
}
template <typename InterpolatorType>
static int interpolateAdding (float* lastInputSamples, double& subSamplePos, double actualRatio,
const float* in, float* out, int numOut,
int available, int wrap, float gain) noexcept
{
if (actualRatio == 1.0)
{
if (available >= numOut)
{
FloatVectorOperations::addWithMultiply (out, in, gain, numOut);
pushInterpolationSamples (lastInputSamples, in, numOut, available, wrap);
}
else
{
FloatVectorOperations::addWithMultiply (out, in, gain, available);
pushInterpolationSamples (lastInputSamples, in, available, available, wrap);
if (wrap > 0)
{
FloatVectorOperations::addWithMultiply (out, in - wrap, gain, numOut - available);
pushInterpolationSamples (lastInputSamples, in - wrap, numOut - available, available, wrap);
}
else
{
for (int i = 0; i < numOut-available; ++i)
pushInterpolationSample (lastInputSamples, 0.0);
}
}
return numOut;
}
auto originalIn = in;
auto pos = subSamplePos;
bool exceeded = false;
if (actualRatio < 1.0)
{
for (int i = numOut; --i >= 0;)
{
if (pos >= 1.0)
{
if (exceeded)
{
pushInterpolationSample (lastInputSamples, 0.0);
}
else
{
pushInterpolationSample (lastInputSamples, *in++);
if (--available <= 0)
{
if (wrap > 0)
{
in -= wrap;
available += wrap;
}
else
{
exceeded = true;
}
}
}
pos -= 1.0;
}
*out++ += gain * InterpolatorType::valueAtOffset (lastInputSamples, (float) pos);
pos += actualRatio;
}
}
else
{
for (int i = numOut; --i >= 0;)
{
while (pos < actualRatio)
{
if (exceeded)
{
pushInterpolationSample (lastInputSamples, 0.0);
}
else
{
pushInterpolationSample (lastInputSamples, *in++);
if (--available <= 0)
{
if (wrap > 0)
{
in -= wrap;
available += wrap;
}
else
{
exceeded = true;
}
}
}
pos += 1.0;
}
pos -= actualRatio;
*out++ += gain * InterpolatorType::valueAtOffset (lastInputSamples, jmax (0.0f, 1.0f - (float) pos));
}
}
subSamplePos = pos;
upgrade to JUCE 5.4.3. Remove (probably) unused JUCE modules. Remove VST2 target (it's been end-of-life'd by Steinberg and by JUCE)
2019-06-23 03:41:38 +08:00
if (wrap == 0)
return (int) (in - originalIn);
fix macOS build (following Projucer changes made in Windows, which removed /Applications/JUCE/modules from its headers). move JUCE headers under source control, so that Windows and macOS can both build against same version of JUCE. remove AUv3 target (I think it's an iOS thing, so it will never work with this macOS fluidsynth dylib).
2018-06-17 20:34:53 +08:00
return ((int) (in - originalIn) + wrap) % wrap;
}
template <typename InterpolatorType>
static int interpolateAdding (float* lastInputSamples, double& subSamplePos, double actualRatio,
const float* in, float* out, int numOut, float gain) noexcept
{
auto pos = subSamplePos;
if (actualRatio == 1.0 && pos == 1.0)
{
FloatVectorOperations::addWithMultiply (out, in, gain, numOut);
pushInterpolationSamples (lastInputSamples, in, numOut);
return numOut;
}
int numUsed = 0;
while (numOut > 0)
{
while (pos >= 1.0)
{
pushInterpolationSample (lastInputSamples, in[numUsed++]);
pos -= 1.0;
}
*out++ += gain * InterpolatorType::valueAtOffset (lastInputSamples, (float) pos);
pos += actualRatio;
--numOut;
}
subSamplePos = pos;
return numUsed;
}
}
//==============================================================================
template <int k>
struct LagrangeResampleHelper
{
static forcedinline void calc (float& a, float b) noexcept { a *= b * (1.0f / k); }
};
template<>
struct LagrangeResampleHelper<0>
{
static forcedinline void calc (float&, float) noexcept {}
};
struct LagrangeAlgorithm
{
static forcedinline float valueAtOffset (const float* inputs, float offset) noexcept
{
return calcCoefficient<0> (inputs[4], offset)
+ calcCoefficient<1> (inputs[3], offset)
+ calcCoefficient<2> (inputs[2], offset)
+ calcCoefficient<3> (inputs[1], offset)
+ calcCoefficient<4> (inputs[0], offset);
}
template <int k>
static forcedinline float calcCoefficient (float input, float offset) noexcept
{
LagrangeResampleHelper<0 - k>::calc (input, -2.0f - offset);
LagrangeResampleHelper<1 - k>::calc (input, -1.0f - offset);
LagrangeResampleHelper<2 - k>::calc (input, 0.0f - offset);
LagrangeResampleHelper<3 - k>::calc (input, 1.0f - offset);
LagrangeResampleHelper<4 - k>::calc (input, 2.0f - offset);
return input;
}
};
LagrangeInterpolator::LagrangeInterpolator() noexcept { reset(); }
LagrangeInterpolator::~LagrangeInterpolator() noexcept {}
void LagrangeInterpolator::reset() noexcept
{
subSamplePos = 1.0;
for (auto& s : lastInputSamples)
s = 0;
}
int LagrangeInterpolator::process (double actualRatio, const float* in, float* out, int numOut, int available, int wrap) noexcept
{
return interpolate<LagrangeAlgorithm> (lastInputSamples, subSamplePos, actualRatio, in, out, numOut, available, wrap);
}
int LagrangeInterpolator::process (double actualRatio, const float* in, float* out, int numOut) noexcept
{
return interpolate<LagrangeAlgorithm> (lastInputSamples, subSamplePos, actualRatio, in, out, numOut);
}
int LagrangeInterpolator::processAdding (double actualRatio, const float* in, float* out, int numOut, int available, int wrap, float gain) noexcept
{
return interpolateAdding<LagrangeAlgorithm> (lastInputSamples, subSamplePos, actualRatio, in, out, numOut, available, wrap, gain);
}
int LagrangeInterpolator::processAdding (double actualRatio, const float* in, float* out, int numOut, float gain) noexcept
{
return interpolateAdding<LagrangeAlgorithm> (lastInputSamples, subSamplePos, actualRatio, in, out, numOut, gain);
}
} // namespace juce
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