new modole system

radio/src/path.h

@@ -0,0 +1,71 @@
+#pragma once
+#include <dsp/filter.h>
+#include <dsp/resampling.h>
+#include <dsp/source.h>
+#include <dsp/math.h>
+#include <dsp/demodulator.h>
+#include <dsp/routing.h>
+#include <dsp/sink.h>
+#include <dsp/correction.h>
+#include <dsp/vfo.h>
+#include <io/audio.h>
+#include <module.h>
+
+class SigPath {
+public:
+    SigPath();
+    void init(std::string vfoName, uint64_t sampleRate, int blockSize, dsp::stream<dsp::complex_t>* input);
+    void start();
+    void setSampleRate(float sampleRate);
+    void setVFOFrequency(uint64_t frequency);
+    void updateBlockSize();
+    void setDemodulator(int demod, float bandWidth);
+    void setDeemphasis(int deemph);
+    void setBandwidth(float bandWidth);
+
+    enum {
+        DEMOD_FM,
+        DEMOD_NFM,
+        DEMOD_AM,
+        DEMOD_USB,
+        DEMOD_LSB,
+        DEMOD_DSB,
+        DEMOD_RAW,
+        _DEMOD_COUNT
+    };
+
+    enum {
+        DEEMP_50US,
+        DEEMP_75US,
+        DEEMP_NONE,
+        _DEEMP_COUNT
+    };
+
+
+    dsp::FMDeemphasis deemp;
+
+private:
+    static int sampleRateChangeHandler(void* ctx, float sampleRate);
+    
+    dsp::stream<dsp::complex_t> input;
+
+    // Demodulators
+    dsp::FMDemodulator demod;
+    dsp::AMDemodulator amDemod;
+    dsp::SSBDemod ssbDemod;
+    dsp::ComplexToStereo cpx2stereo;
+
+    // Audio output
+    dsp::MonoToStereo m2s;
+    dsp::FIRResampler<float> audioResamp;
+
+    std::string vfoName;
+
+    float sampleRate;
+    float bandwidth;
+    float outputSampleRate;
+    int blockSize;
+    int _demod;
+    int _deemp;
+    float audioBw;
+};