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79 lines
1.7 KiB
79 lines
1.7 KiB
4 years ago
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#pragma once
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#ifndef DSY_CROSSFADE_H
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#define DSY_CROSSFADE_H
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#include <stdint.h>
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#ifdef __cplusplus
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namespace daisysp
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{
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/** Curve applied to the CrossFade
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- LIN = linear
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- CPOW = constant power
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- LOG = logarithmic
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- EXP exponential
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- LAST = end of enum (used for array indexing)
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*/
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enum
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{
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CROSSFADE_LIN,
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CROSSFADE_CPOW,
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CROSSFADE_LOG,
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CROSSFADE_EXP,
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CROSSFADE_LAST,
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};
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/** Performs a CrossFade between two signals
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Original author: Paul Batchelor
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Ported from Soundpipe by Andrew Ikenberry
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added curve option for constant power, etc.
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*/
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class CrossFade
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{
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public:
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CrossFade() {}
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~CrossFade() {}
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/** Initializes CrossFade module
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Defaults
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- current position = .5
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- curve = linear
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*/
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inline void Init(int curve)
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{
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pos_ = 0.5f;
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curve_ = curve < CROSSFADE_LAST ? curve : CROSSFADE_LIN;
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}
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/** Initialize with default linear curve
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*/
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inline void Init() { Init(CROSSFADE_LIN); }
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/** processes CrossFade and returns single sample
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*/
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float Process(float &in1, float &in2);
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/** Sets position of CrossFade between two input signals
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Input range: 0 to 1
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*/
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inline void SetPos(float pos) { pos_ = pos; }
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/** Sets current curve applied to CrossFade
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Expected input: See [Curve Options](##curve-options)
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*/
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inline void SetCurve(uint8_t curve) { curve_ = curve; }
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/** Returns current position
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*/
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inline float GetPos(float pos) { return pos_; }
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/** Returns current curve
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*/
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inline uint8_t GetCurve(uint8_t curve) { return curve_; }
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private:
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float pos_;
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uint8_t curve_;
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};
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} // namespace daisysp
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#endif
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#endif
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