Add extended waveshaper primitives for fuzz and tube effects #64
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Adds waveshaper.h with three new clipping functions that complement the existing distortion.h primitives: - fold_back(x, threshold): foldback distortion for synth-fuzz tones - tube_clip(x): polynomial tube approximation with soft knee - diode_clip(x, ratio): asymmetric diode emulation All functions are self-contained with no external dependencies. fold_back includes iteration limiting to prevent infinite loops. Addresses issue torvalds#63 Signed-off-by: The Hand <[email protected]>
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Adds
waveshaper.hwith three new clipping functions that complement the existingdistortion.hprimitives:fold_back(x, threshold): Foldback distortion for synth-fuzz tones. Signal folds back when exceeding threshold, creating complex harmonics. Includes iteration limiting to prevent infinite loops on extreme input.tube_clip(x): Polynomial tube approximation with soft knee. Based ony = x * (1.5 - 0.5 * x^2), provides gentle compression similar to tube saturation.diode_clip(x, ratio): Asymmetric diode emulation. Uses internal soft clip helper to create even harmonics with configurable asymmetry ratio.Design Notes
static inlinefollowing existing patterns_ws_soft_cliphelper)distortion.hfunctionsTesting
These primitives are building blocks for future effects (fuzz, wah, etc.) as discussed in #63.
Addresses #63
Signed-off-by: The Hand [email protected]