freeze_loop_sampler.hpp File Reference

Capture-and-loop "freeze": snapshot a slice of recent audio and play it back as a seamless loop. More...

#include <algorithm>
#include <cmath>
#include <cstddef>
#include <cstdint>
#include <limits>
#include <type_traits>
#include <vector>

Go to the source code of this file.

Classes
class	pulp::signal::FreezeLoopSamplerT< SampleType >

Namespaces
namespace	pulp
namespace	pulp::signal

Typedefs
using	pulp::signal::FreezeLoopSampler = FreezeLoopSamplerT<float>
using	pulp::signal::FreezeLoopSampler64 = FreezeLoopSamplerT<double>

Detailed Description

Capture-and-loop "freeze": snapshot a slice of recent audio and play it back as a seamless loop.

Distinct from a spectral freeze (which holds one STFT frame forever): this is a time-domain sampler. It records the incoming signal into a ring continuously, so the instant freeze() is called the last loop_samples of audio are already captured; that slice is then looped with an equal-power crossfade across the loop boundary so the wrap is click-free. Because it produces an ordinary audio stream, downstream stages (pitch shift, formant, delay) keep working on the frozen loop — freeze a moment, then bend it.

Crossfade scheme: the captured slice is loop_samples long plus a crossfade tail of the samples that followed it. At bake time the head crossfade samples are constant-power-blended with that tail (head fading in, tail fading out), so playing the slice on repeat transitions the end smoothly back into the start. Real-time-safe after prepare(); freeze()/read() allocate nothing.