Add LiGetMillis() for clients to use for latency calculation

src/Limelight.h

@@ -105,9 +105,9 @@ typedef struct _DECODE_UNIT {
     // Frame type
     int frameType;
 
-    // Receive time of first buffer
+    // Receive time of first buffer. This value uses an implementation-defined epoch.
-    // NOTE: This will be populated from gettimeofday() if !HAVE_CLOCK_GETTIME and
+    // To compute actual latency values, use LiGetMillis() to get a timestamp that
-    // populated from clock_gettime(CLOCK_MONOTONIC) if HAVE_CLOCK_GETTIME
+    // shares the same epoch as this value.
     unsigned long long receiveTimeMs;
 
     // Length of the entire buffer chain in bytes
@@ -389,6 +389,11 @@ int LiSendMultiControllerEvent(short controllerNumber, short activeGamepadMask,
 // This function queues a vertical scroll event to the remote server.
 int LiSendScrollEvent(signed char scrollClicks);
 
+// This function returns a time in milliseconds with an implementation-defined epoch.
+// NOTE: This will be populated from gettimeofday() if !HAVE_CLOCK_GETTIME and
+// populated from clock_gettime(CLOCK_MONOTONIC) if HAVE_CLOCK_GETTIME.
+unsigned long long LiGetMillis(void);
+
 #ifdef __cplusplus
 }
 #endif

src/Misc.c

@@ -88,3 +88,7 @@ void LiInitializeConnectionCallbacks(PCONNECTION_LISTENER_CALLBACKS clCallbacks)
 void LiInitializeServerInformation(PSERVER_INFORMATION serverInfo) {
     memset(serverInfo, 0, sizeof(*serverInfo));
 }
+
+unsigned long long LiGetMillis(void) {
+    return PltGetMillis();
+}

src/Platform.c

@@ -293,7 +293,7 @@ int PltWaitForEvent(PLT_EVENT* event) {
 #endif
 }
 
-uint64_t PltGetMillis(void) {
+unsigned long long PltGetMillis(void) {
 #if defined(LC_WINDOWS)
     return GetTickCount64();
 #elif HAVE_CLOCK_GETTIME

src/Platform.h

@@ -2,7 +2,6 @@
 
 #include <stdlib.h>
 #include <string.h>
-#include <stdint.h>
 
 #ifdef _WIN32
 #define WIN32_LEAN_AND_MEAN
@@ -63,4 +62,4 @@
 int initializePlatform(void);
 void cleanupPlatform(void);
 
-uint64_t PltGetMillis(void);
+unsigned long long PltGetMillis(void);

src/RtpReorderQueue.h

@@ -8,7 +8,7 @@
 typedef struct _RTP_QUEUE_ENTRY {
     PRTP_PACKET packet;
 
-    uint64_t queueTimeMs;
+    unsigned long long queueTimeMs;
 
     struct _RTP_QUEUE_ENTRY* next;
     struct _RTP_QUEUE_ENTRY* prev;