Optimise and refactor protocol, better logging, optimise rendering, double buffering.

src/protocol/connection_reader.h

@@ -0,0 +1,61 @@
+#ifndef SRC_PROTOCOL_CONNECTION_READER
+#define SRC_PROTOCOL_CONNECTION_READER
+
+#include <libusb-1.0/libusb.h>
+
+#include <atomic>
+#include <cstddef>
+#include <cstdint>
+#include <thread>
+#include <vector>
+
+#include "struct/usb_buffer.h"
+#include "protocol/aes_cipher.h"
+#include "protocol/message.h"
+
+class IMessageReceiver
+{
+public:
+    virtual ~IMessageReceiver() = default;
+    virtual void onMessage(std::unique_ptr<Message> message) = 0;
+};
+
+class ConnectionReader
+{
+public:
+    ConnectionReader();
+    ~ConnectionReader();
+
+    ConnectionReader(const ConnectionReader &) = delete;
+    ConnectionReader &operator=(const ConnectionReader &) = delete;
+
+    bool start(libusb_context *context, libusb_device_handle *device, uint8_t endpoint, IMessageReceiver *receiver);
+    void stop();
+
+    int bufferCount() const { return _buffer.count(); }
+    bool active() const { return _active; }
+
+private:
+    struct Context
+    {
+        ConnectionReader *owner = nullptr;
+        DataSlot *slot = nullptr;
+        libusb_transfer *transfer = nullptr;
+    };
+
+    static void onUsbRead(libusb_transfer *transfer);
+    void readLoop();
+    void processLoop();
+
+    void cancelTransfers();
+
+    std::atomic<bool> _active;
+    UsbBuffer _buffer;
+    std::vector<Context> _transfers;
+    IMessageReceiver *_receiver;
+    std::thread _readThread;
+    std::thread _processThread;
+    libusb_context *_usbContext;
+};
+
+#endif /* SRC_PROTOCOL_CONNECTION_READER */