Fixed clock timing on Windows.

Previously, clock timing was mocked out to 0.  This fixes it and gives
correct timings in ms for plate recognitions

src/openalpr/support/timing.cpp

@@ -1,35 +1,103 @@
 #include "timing.h"
 
-#ifdef __MACH__
-#include <mach/clock.h>
-#include <mach/mach.h>
-#endif
 
 #ifdef WINDOWS
 
 
 timespec diff(timespec start, timespec end);
 
+
+// Windows timing code
+LARGE_INTEGER getFILETIMEoffset()
+{
+    SYSTEMTIME s;
+    FILETIME f;
+    LARGE_INTEGER t;
+
+    s.wYear = 1970;
+    s.wMonth = 1;
+    s.wDay = 1;
+    s.wHour = 0;
+    s.wMinute = 0;
+    s.wSecond = 0;
+    s.wMilliseconds = 0;
+    SystemTimeToFileTime(&s, &f);
+    t.QuadPart = f.dwHighDateTime;
+    t.QuadPart <<= 32;
+    t.QuadPart |= f.dwLowDateTime;
+    return (t);
+}
+
+int clock_gettime(int X, timespec *tv)
+{
+    LARGE_INTEGER           t;
+    FILETIME            f;
+    double                  microseconds;
+    static LARGE_INTEGER    offset;
+    static double           frequencyToMicroseconds;
+    static int              initialized = 0;
+    static BOOL             usePerformanceCounter = 0;
+
+    if (!initialized) {
+        LARGE_INTEGER performanceFrequency;
+        initialized = 1;
+        usePerformanceCounter = QueryPerformanceFrequency(&performanceFrequency);
+        if (usePerformanceCounter) {
+            QueryPerformanceCounter(&offset);
+            frequencyToMicroseconds = (double)performanceFrequency.QuadPart / 1000000.;
+        } else {
+            offset = getFILETIMEoffset();
+            frequencyToMicroseconds = 10.;
+        }
+    }
+    if (usePerformanceCounter) QueryPerformanceCounter(&t);
+    else {
+        GetSystemTimeAsFileTime(&f);
+        t.QuadPart = f.dwHighDateTime;
+        t.QuadPart <<= 32;
+        t.QuadPart |= f.dwLowDateTime;
+    }
+
+    t.QuadPart -= offset.QuadPart;
+    microseconds = (double)t.QuadPart / frequencyToMicroseconds;
+    t.QuadPart = microseconds;
+    tv->tv_sec = t.QuadPart / 1000000;
+    tv->tv_usec = t.QuadPart % 1000000;
+    return (0);
+}
+
+
+
 void getTime(timespec* time)
 {
-    // Do nothing on Windows
+	clock_gettime(0, time);
+
 }
 double diffclock(timespec time1,timespec time2)
 {
-	// Mock this out for Windows
+    timespec delta = diff(time1,time2);
-    return 0;
+    double milliseconds = (delta.tv_sec * 1000) +  (((double) delta.tv_usec) / 1000.0);
+    
+    
+    return milliseconds;
 }
 
 timespec diff(timespec start, timespec end)
 {
-	// Mock this out for Windows
+	timespec temp;
-	return 0;
+	if ((end.tv_usec-start.tv_usec)<0) {
+		temp.tv_sec = end.tv_sec-start.tv_sec-1;
+		temp.tv_usec = 1000000+end.tv_usec-start.tv_usec;
+	} else {
+		temp.tv_sec = end.tv_sec-start.tv_sec;
+		temp.tv_usec = end.tv_usec-start.tv_usec;
+	}
+	return temp;
 }
 
 #else
 
 
-timespec diff(timespec start, timespec end);
 
 void getTime(timespec* time)
 {

src/openalpr/support/timing.h

@@ -3,10 +3,17 @@
 
 #include <iostream>
 
+// Support for OS X
+#ifdef __MACH__
+#include <mach/clock.h>
+#include <mach/mach.h>
+#endif
 
+// Support for Windows
 #ifdef WINDOWS
-	// Mock this out for Windows
+	#include <windows.h>
-	#define timespec int
+
+	#define timespec timeval
 #endif
 
   void getTime(timespec* time);