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-rw-r--r--libs/ardour/ardour/dsp_filter.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/libs/ardour/ardour/dsp_filter.h b/libs/ardour/ardour/dsp_filter.h
index f54eeac302..f3100efac5 100644
--- a/libs/ardour/ardour/dsp_filter.h
+++ b/libs/ardour/ardour/dsp_filter.h
@@ -310,5 +310,33 @@ namespace ARDOUR { namespace DSP {
fftwf_plan _fftplan;
};
+ class LIBARDOUR_API Generator {
+ public:
+ Generator ();
+
+ enum Type {
+ UniformWhiteNoise,
+ GaussianWhiteNoise,
+ PinkNoise,
+ };
+
+ void run (float *data, const uint32_t n_samples);
+ void set_type (Type t);
+
+ private:
+ uint32_t randi ();
+ float randf () { return (randi () / 1073741824.f) - 1.f; }
+ float grandf ();
+
+ Type _type;
+ uint32_t _rseed;
+ /* pink-noise */
+ float _b0, _b1, _b2, _b3, _b4, _b5, _b6;
+ /* gaussian white */
+ bool _pass;
+ float _rn;
+
+ };
+
} } /* namespace */
#endif