Optimize plugin-processing for non-automated params

[ardour.git] / libs / ardour / ardour / dsp_filter.h

diff --git a/libs/ardour/ardour/dsp_filter.h b/libs/ardour/ardour/dsp_filter.h
index f54eeac30205355ec5c48529bcf75d7233ec3b91..f3100efac55ac168682d4d4e519cfb1ff44cab2e 100644 (file)
--- 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