Properly calculate UTC/Local timestamps in SER files. Fixes #15

Author: GuLinux

src/commons/ser_header.cpp

@@ -17,7 +17,7 @@
  */
 #include "ser_header.h"
 #include <map>
-
+#include <QDebug>
 using namespace std;
 
 namespace {
@@ -38,6 +38,7 @@ map<Frame::ColorFormat, SER_Header::ColorId> color_format_conversion(){
   };
   return _map;
 };
+  static const QDateTime reference_datetime{{1,1,1},{0,0,0}, Qt::UTC};
 }
 
 size_t SER_Header::frame_size() const
@@ -70,13 +71,16 @@ void SER_Header::set_color_format(const Frame::ColorFormat& format)
 
  SER_Timestamp SER_Header::timestamp(const QDateTime& datetime)
 {
-  static const QDateTime reference{{1, 1, 1}, {0,0,0}};
-  return qToLittleEndian(reference.msecsTo(datetime) * 10000);
+  auto diff_msecs = reference_datetime.msecsTo(datetime);
+  if(datetime.timeSpec() == Qt::LocalTime) {
+    diff_msecs += datetime.offsetFromUtc() * 1000l;
+  }
+  return qToLittleEndian(diff_msecs * 10000);
 }
 
 QDateTime SER_Header::qdatetime(const SER_Timestamp& timestamp)
 {
-  static const QDateTime reference{{1, 1, 1}, {0,0,0}};
-  return reference.addMSecs( qFromLittleEndian(timestamp) / 10000);
+  // TODO: support also local timestamp?
+  return reference_datetime.addMSecs(qFromLittleEndian(timestamp) / 10000);
 }
 

src/image_handlers/output_writers/serwriter.cpp

@@ -51,7 +51,6 @@ SERWriter::SERWriter ( const QString& deviceName, const Configuration::ptr & con
   SER_Header empty_header;
   empty_header.datetime = SER_Header::timestamp(QDateTime::currentDateTime());
   empty_header.datetime_utc = SER_Header::timestamp(QDateTime::currentDateTimeUtc());
-  qDebug() << "Starting datetime: " << QDateTime::currentDateTimeUtc() << ", : " << SER_Header::qdatetime(empty_header.datetime_utc);
   ::strcpy(empty_header.camera, deviceName.left(40).toLatin1());
   ::strcpy(empty_header.observer, configuration->observer().left(40).toLatin1());
   ::strcpy(empty_header.telescope, configuration->telescope().left(40).toLatin1());

tests/CMakeLists.txt

@@ -2,7 +2,14 @@ include_directories(googletest/include)
 add_executable(test_qimage_destructor test_qimage_destructor.cpp)
 target_link_libraries(test_qimage_destructor gtest_main Qt5::Widgets)
 add_test(qimage_destructor test_qimage_destructor)
-add_subdirectory(googletest)
+
 add_executable(test_roi_validator test_roi_validator.cpp)
 target_link_libraries(test_roi_validator gtest_main drivers Qt5::Widgets)
 add_test(roi_validator_test test_roi_validator)
+
+add_executable(test_ser_header test_ser_header.cpp ${CMAKE_SOURCE_DIR}/src/commons/ser_header.cpp)
+target_link_libraries(test_ser_header gtest_main ${OpenCV_LIBS} Qt5::Widgets)
+add_test(ser_header_test test_ser_header)
+
+
+add_subdirectory(googletest)

tests/test_ser_header.cpp

@@ -0,0 +1,20 @@
+#include "gtest/gtest.h"
+#include "commons/ser_header.h"
+#include <QDateTime>
+#include <QDebug>
+using namespace std;
+
+
+TEST(SerHeader, test_qdatetime_utc_to_ser) {
+  QDateTime now{{2017, 06, 20}, {10, 10, 00}, Qt::UTC};
+  auto ser_datetime = SER_Header::timestamp(now);
+  ASSERT_EQ(636335502000000000, ser_datetime);
+}
+
+
+TEST(SerHeader, test_qdatetime_local_to_ser) {
+  QDateTime now{{2017, 06, 20}, {10, 10, 00}, Qt::LocalTime, 3600};
+  auto ser_datetime = SER_Header::timestamp(now);
+  ASSERT_EQ(636335502000000000, ser_datetime);
+}
+