add ryfi decoder module

decoder_modules/ryfi_decoder/src/ryfi/transmitter.h

@@ -0,0 +1,69 @@
+#pragma once
+#include "dsp/multirate/rational_resampler.h"
+#include "dsp/taps/root_raised_cosine.h"
+#include "dsp/filter/fir.h"
+#include "packet.h"
+#include "frame.h"
+#include "rs_codec.h"
+#include "conv_codec.h"
+#include "framing.h"
+#include <queue>
+#include <mutex>
+
+namespace ryfi {
+    class Transmitter {
+    public:
+        /**
+         * Create a transmitter.
+         * @param baudrate Baudrate to use over the air.
+         * @param samplerate Samplerate of the baseband.
+        */
+        Transmitter(double baudrate, double samplerate);
+
+        // Destructor
+        ~Transmitter();
+
+        /**
+         * Start the transmitter's DSP.
+        */
+        void start();
+
+        /**
+         * Stop the transmitter's DSP.
+        */
+        void stop();
+
+        /**
+         * Send a packet.
+         * @param pkg Packet to send.
+         * @return True if the packet was send, false if it was dropped.
+        */
+        bool send(const Packet& pkt);
+
+        // Baseband output
+        dsp::stream<dsp::complex_t>* out;
+
+        static inline const int MAX_QUEUE_SIZE  = 32;
+
+    private:
+        bool txFrame(const Frame& frame);
+        Packet popPacket();
+        void worker();
+
+        // Packet queue
+        std::mutex packetsMtx;
+        std::queue<Packet> packets;
+
+        // DSP
+        dsp::stream<uint8_t> in;
+        RSEncoder rs;
+        ConvEncoder conv;
+        Framer framer;
+        dsp::multirate::RationalResampler<dsp::complex_t> resamp;
+        dsp::tap<float> rrcTaps;
+        dsp::filter::FIR<dsp::complex_t, float> rrc;
+
+        bool running = false;
+        std::thread workerThread;
+    };
+}