Add input handling class
The Input class depends on the RFB server and V4L2 video classes, so
add outlines for those as well.
Change-Id: I2826f3da78dee10826e378dfc2c773b891da1f03
Signed-off-by: Eddie James <eajames@linux.ibm.com>
diff --git a/ikvm_input.hpp b/ikvm_input.hpp
new file mode 100644
index 0000000..7c8120d
--- /dev/null
+++ b/ikvm_input.hpp
@@ -0,0 +1,109 @@
+#pragma once
+
+#include <rfb/rfb.h>
+
+#include <map>
+#include <string>
+
+namespace ikvm
+{
+
+/*
+ * @class Input
+ * @brief Receives events from RFB clients and sends reports to the USB input
+ * device
+ */
+class Input
+{
+ public:
+ /*
+ * @brief Constructs Input object
+ *
+ * @param[in] p - Path to the USB input device
+ */
+ Input(const std::string& p);
+ ~Input();
+ Input(const Input&) = default;
+ Input& operator=(const Input&) = default;
+ Input(Input&&) = default;
+ Input& operator=(Input&&) = default;
+
+ /*
+ * @brief RFB client key event handler
+ *
+ * @param[in] down - Boolean indicating whether key is pressed or not
+ * @param[in] key - Key code
+ * @param[in] cl - Handle to the RFB client
+ */
+ static void keyEvent(rfbBool down, rfbKeySym key, rfbClientPtr cl);
+ /*
+ * @brief RFB client pointer event handler
+ *
+ * @param[in] buttonMask - Bitmask indicating which buttons have been
+ * pressed
+ * @param[in] x - Pointer x-coordinate
+ * @param[in] y - Pointer y-coordinate
+ * @param[in] cl - Handle to the RFB client
+ */
+ static void pointerEvent(int buttonMask, int x, int y, rfbClientPtr cl);
+
+ /*
+ * @brief Sends a data packet to the USB input device
+ *
+ * @param[in] data - pointer to data
+ * @param[in] size - number of bytes to send
+ */
+ void sendRaw(char* data, int size);
+ /* @brief Sends an HID report to the USB input device */
+ void sendReport();
+
+ private:
+ enum
+ {
+ NUM_MODIFIER_BITS = 4,
+ POINTER_LENGTH = 6,
+ REPORT_LENGTH = 8
+ };
+
+ /* @brief Keyboard HID identifier byte */
+ static const char keyboardID;
+ /* @brief Pointer HID identifier byte */
+ static const char pointerID;
+ /* @brief HID modifier bits mapped to shift and control key codes */
+ static const char shiftCtrlMap[NUM_MODIFIER_BITS];
+ /* @brief HID modifier bits mapped to meta and alt key codes */
+ static const char metaAltMap[NUM_MODIFIER_BITS];
+
+ /*
+ * @brief Translates a RFB-specific key code to HID modifier bit
+ *
+ * @param[in] key - key code
+ */
+ static char keyToMod(rfbKeySym key);
+ /*
+ * @brief Translates a RFB-specific key code to HID scancode
+ *
+ * @param[in] key - key code
+ */
+ static char keyToScancode(rfbKeySym key);
+
+ /* @brief Indicates whether or not to send a keyboard report */
+ bool sendKeyboard;
+ /* @brief Indicates whether or not to send a pointer report */
+ bool sendPointer;
+ /* @brief File descriptor for the USB input device */
+ int fd;
+ /* @brief Data for keyboard report */
+ char keyboardReport[REPORT_LENGTH];
+ /* @brief Data for pointer report */
+ char pointerReport[REPORT_LENGTH];
+ /* @brief Path to the USB input device */
+ std::string path;
+ /*
+ * @brief Mapping of RFB key code to report data index to keep track
+ * of which keys are down
+ */
+ std::map<int, int> keysDown;
+};
+
+} // namespace ikvm