From 3ec96c9a81f0f770fac75a1bdfc16ea96df07d9b Mon Sep 17 00:00:00 2001
From: Justin Berger <j.david.berger@gmail.com>
Date: Fri, 9 Mar 2018 00:21:17 -0700
Subject: Swapped to OGGetAbsoluteTime for timestamp

---
 data_recorder.c        | 15 +++++++--------
 src/survive_playback.c | 20 +++++++++-----------
 2 files changed, 16 insertions(+), 19 deletions(-)

diff --git a/data_recorder.c b/data_recorder.c
index 323d208..63746c3 100644
--- a/data_recorder.c
+++ b/data_recorder.c
@@ -15,6 +15,8 @@
 #include <sys/time.h>
 #include <stdarg.h>
 
+#include "redist/os_generic.h"
+
 struct SurviveContext * ctx;
 
 FILE* output_file = 0;
@@ -49,21 +51,18 @@ int bufferpts[32*2*3];
 char buffermts[32*128*3];
 int buffertimeto[32*3];
 
-uint64_t timestamp_in_us() {
-  static uint64_t start_time_us = 0;  
-  struct timeval tv;
-  gettimeofday(&tv,NULL);
-  uint64_t now = (uint64_t)tv.tv_sec * 1000000L + tv.tv_usec;
+double timestamp_in_us() {
+  static double start_time_us = 0;
   if(start_time_us == 0)
-    start_time_us = now;
-  return now - start_time_us;
+    start_time_us = OGGetAbsoluteTime();
+  return OGGetAbsoluteTime() - start_time_us;
 }
 
 int write_to_output(const char *format, ...)
 {
     va_list args;
     va_start(args, format);
-    fprintf(output_file, "%lu ", timestamp_in_us());
+    fprintf(output_file, "%.17g ", timestamp_in_us());
     vfprintf(output_file, format, args);
 
     va_end(args);
diff --git a/src/survive_playback.c b/src/survive_playback.c
index d8c6fba..7c49f5b 100755
--- a/src/survive_playback.c
+++ b/src/survive_playback.c
@@ -10,6 +10,8 @@
 #include "survive_config.h"
 #include "survive_default_devices.h"
 
+#include "redist/os_generic.h"
+
 struct SurvivePlaybackData {
   SurviveContext * ctx;
   const char* playback_dir; 
@@ -17,19 +19,16 @@ struct SurvivePlaybackData {
   int lineno;
 
   FLT time_factor;
-  uint64_t next_time_us; 
+  double next_time_us; 
 };
 typedef struct SurvivePlaybackData SurvivePlaybackData;
 
 
-uint64_t timestamp_in_us() {
-  static uint64_t start_time_us = 0;
-  struct timeval tv;
-  gettimeofday(&tv,NULL);
-  uint64_t now = (uint64_t)tv.tv_sec * 1000000L + tv.tv_usec;
-  if(start_time_us == 0)
-    start_time_us = now;
-  return now - start_time_us;
+double timestamp_in_us() {
+  static double start_time_us = 0;
+  if(start_time_us == 0.)
+    start_time_us = OGGetAbsoluteTime();
+  return OGGetAbsoluteTime() - start_time_us;
 }
 
 static int parse_and_run_imu(const char* line, SurvivePlaybackData* driver) {  
@@ -110,8 +109,7 @@ static int playback_poll( struct SurviveContext * ctx, void * _driver ) {
 	ssize_t r = getdelim( &line, &n, ' ', f );
 	if( r <= 0 ) return 0;
 
-	uint64_t timestamp;
-	if(sscanf(line, "%lu", &driver->next_time_us) != 1) {
+	if(sscanf(line, "%lf", &driver->next_time_us) != 1) {
 	  free(line);
 	  return 0;
 	}
-- 
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