sfizz/sources/SIMDHelpers.h
2019-08-21 01:00:07 +02:00

67 lines
2.3 KiB
C++

#include "gsl/gsl-lite.hpp"
#include "Globals.h"
#include "Helpers.h"
template<class T, bool SIMD=SIMDConfig::readInterleaved>
void readInterleaved(gsl::span<const T> input, gsl::span<T> outputLeft, gsl::span<T> outputRight) noexcept
{
// The size of the output is not big enough for the input...
ASSERT(outputLeft.size() >= input.size() / 2);
ASSERT(outputRight.size() >= input.size() / 2);
auto* in = input.begin();
auto* lOut = outputLeft.begin();
auto* rOut = outputRight.begin();
while (in < (input.end() - 1) && lOut < outputLeft.end() && rOut < outputRight.end())
{
*lOut++ = *in++;
*rOut++ = *in++;
}
}
template<class T, bool SIMD=SIMDConfig::writeInterleaved>
void writeInterleaved(gsl::span<const T> inputLeft, gsl::span<const T> inputRight, gsl::span<T> output) noexcept
{
ASSERT(inputLeft.size() <= output.size() / 2);
ASSERT(inputRight.size() <= output.size() / 2);
auto* lIn = inputLeft.begin();
auto* rIn = inputRight.begin();
auto* out = output.begin();
while (lIn < inputLeft.end() && rIn < inputRight.end() && out < (output.end() - 1))
{
*out++ = *lIn++;
*out++ = *rIn++;
}
}
// Specializations
template<>
void writeInterleaved<float, true>(gsl::span<const float> inputLeft, gsl::span<const float> inputRight, gsl::span<float> output) noexcept;
template<>
void readInterleaved<float, true>(gsl::span<const float> input, gsl::span<float> outputLeft, gsl::span<float> outputRight) noexcept;
template<class T, bool SIMD=SIMDConfig::fill>
void fill(gsl::span<T> output, T value) noexcept
{
std::fill(output.begin(), output.end(), value);
}
template<>
void fill<float, true>(gsl::span<float> output, float value) noexcept;
template<class T, bool SIMD=SIMDConfig::useSIMD>
void loopingSFZIndex(gsl::span<const T> inputLeft, gsl::span<const T> inputRight, gsl::span<T> output);
template<class T, bool SIMD=SIMDConfig::useSIMD>
void linearRamp(gsl::span<T> output, T start, T end);
template<class T, bool SIMD=SIMDConfig::useSIMD>
void exponentialRamp(gsl::span<T> output, T start, T end);
template<class T, bool SIMD=SIMDConfig::useSIMD>
void applyGain(T gain, gsl::span<T> output);
template<class T, bool SIMD=SIMDConfig::useSIMD>
void applyGain(gsl::span<const T> gain, gsl::span<T> output);