More DSP cleanup + Remove FastFFT option because it should never be used

core/src/dsp/mod/quadrature.h

@@ -0,0 +1,67 @@
+#pragma once
+#include "../processor.h"
+#include "../math/phasor.h"
+#include "../math/normalize_phase.h"
+#include "../math/hz_to_rads.h"
+
+namespace dsp::mod {
+    class Quadrature : Processor<float, complex_t> {
+        using base_type = Processor<float, complex_t>;
+    public:
+        Quadrature() {}
+
+        Quadrature(stream<float>* in, double deviation) { init(in, deviation); }
+
+        Quadrature(stream<float>* in, double deviation, double samplerate) { init(in, deviation, samplerate); }
+
+        void init(stream<float>* in, double deviation) {
+            _deviation = deviation;
+            base_type::init(in);
+        }
+
+        void init(stream<float>* in, double deviation, double samplerate) {
+            init(in, math::hzToRads(deviation, samplerate));
+        }
+
+        void setDeviation(double deviation) {
+            assert(base_type::_block_init);
+            std::lock_guard<std::recursive_mutex> lck(base_type::ctrlMtx);
+            _deviation = deviation;
+        }
+
+        void setDeviation(double deviation, double samplerate) {
+            assert(base_type::_block_init);
+            std::lock_guard<std::recursive_mutex> lck(base_type::ctrlMtx);
+            _deviation = math::hzToRads(deviation, samplerate);
+        }
+
+        void reset() {
+            assert(base_type::_block_init);
+            std::lock_guard<std::recursive_mutex> lck(base_type::ctrlMtx);
+            phase = 0.0f;
+        }
+
+        inline int process(int count, const float* in, complex_t* out) {
+            for (int i = 0; i < count; i++) {
+                phase = math::normalizePhase(phase + (_deviation * in[i]));
+                out[i] = math::phasor(phase);
+            }
+            return count;
+        }
+
+        virtual int run() {
+            int count = base_type::_in->read();
+            if (count < 0) { return -1; }
+
+            process(count, base_type::_in->readBuf, base_type::out.writeBuf);
+
+            base_type::_in->flush();
+            if (!base_type::out.swap(count)) { return -1; }
+            return count;
+        }
+
+    private:
+        float _deviation;
+        float phase = 0.0f;
+    };
+}