rcinput: use a dynamic list of input devices

Instead of the fixed, static list of input devices, scan /dev/input/ for
proper event devices. A "good" input device is one that supports the
EVIOCGBIT ioctl and at least the EV_KEY event type.
This probably needs further fixes, e.g. in repeat rate setting code.


Origin commit data
------------------
Branch: ni/coolstream
Commit: 7b3aa2b181
Author: Stefan Seyfried <seife@tuxbox-git.slipkontur.de>
Date: 2017-02-19 (Sun, 19 Feb 2017)



------------------
This commit was generated by Migit

src/driver/rcinput.h

@@ -39,6 +39,9 @@
 #include <string>
 #include <vector>
 
+#include <OpenThreads/Mutex>
+#include <OpenThreads/ScopedLock>
+
 #ifdef BOXMODEL_CS_HD2
 #ifdef HAVE_COOLSTREAM_CS_IR_GENERIC_H
 #include <cs_ir_generic.h>
@@ -138,6 +141,12 @@ class CRCInput
 			bool			correct_time;
 		};
 
+		struct in_dev
+		{
+			int fd;
+			std::string path;
+		};
+
 		uint32_t               timerid;
 		std::vector<timer> timers;
 
@@ -147,21 +156,19 @@ class CRCInput
 		int 		fd_pipe_high_priority[2];
 		int 		fd_pipe_low_priority[2];
 		int         	fd_gamerc;
-#ifdef HAVE_SPARK_HARDWARE
-#define NUMBER_OF_EVENT_DEVICES 2
-#else
-#define NUMBER_OF_EVENT_DEVICES 1
-#endif
-		int         	fd_rc[NUMBER_OF_EVENT_DEVICES];
+		std::vector<in_dev> indev;
 		int		fd_keyb;
 		int		fd_event;
 
 		int		fd_max;
 		int		clickfd;
 		__u16 rc_last_key;
+		OpenThreads::Mutex mutex;
 		void set_dsp();
 
-		void open(int dev = -1);
+		void open(bool recheck = false);
+		bool checkpath(in_dev id);
+		bool checkdev();
 		void close();
 		int translate(int code);
 		void calculateMaxFd(void);
@@ -280,7 +287,9 @@ class CRCInput
 
 		inline int getFileHandle(void) /* used for plugins (i.e. games) only */
 		{
-			return fd_rc[0];
+			if (indev.empty())
+				return -1;
+			return indev[0].fd;
 		}
 		void stopInput(const bool ext = false);
 		void restartInput(const bool ext = false);