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authorNaushir Patuck <naush@raspberrypi.com>2021-06-08 12:03:32 +0100
committerLaurent Pinchart <laurent.pinchart@ideasonboard.com>2021-06-08 23:56:03 +0300
commit5055ca747c4c0d635ed8f2ab272f493748c2f50a (patch)
tree66c5b36389a5d0f4bfe07f2edf5bf4877c413d30 /test/utils.cpp
parent75c14908271d44edac3b7c8d0f94501a3c93477e (diff)
libcamera: utils: Add helper class for std::chrono::duration
A new utils::Duration class is defined to represent a std::chrono::duration type with double precision nanosecond timebase. Using a double minimises the loss of precision when converting timebases. This helper class may be used by IPAs to represent variables such as frame durations and exposure times. An operator << overload is defined to help with displaying utils::Duration value in stream objects. Currently, this will display the duration value in microseconds. Signed-off-by: Naushir Patuck <naush@raspberrypi.com> Reviewed-by: David Plowman <david.plowman@raspberrypi.com> Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'test/utils.cpp')
-rw-r--r--test/utils.cpp45
1 files changed, 45 insertions, 0 deletions
diff --git a/test/utils.cpp b/test/utils.cpp
index 7e24c71e..f170ae4c 100644
--- a/test/utils.cpp
+++ b/test/utils.cpp
@@ -20,6 +20,7 @@
using namespace std;
using namespace libcamera;
+using namespace std::literals::chrono_literals;
class UtilsTest : public Test
{
@@ -128,6 +129,46 @@ protected:
return TestPass;
}
+ int testDuration()
+ {
+ std::ostringstream os;
+ utils::Duration exposure;
+ double ratio;
+
+ exposure = 25ms + 25ms;
+ if (exposure.get<std::micro>() != 50000.0) {
+ cerr << "utils::Duration failed to return microsecond count";
+ return TestFail;
+ }
+
+ exposure = 1.0s / 4;
+ if (exposure != 250ms) {
+ cerr << "utils::Duration failed scalar divide test";
+ return TestFail;
+ }
+
+ exposure = 5000.5us;
+ if (!exposure) {
+ cerr << "utils::Duration failed boolean test";
+ return TestFail;
+ }
+
+ os << exposure;
+ if (os.str() != "5000.50us") {
+ cerr << "utils::Duration operator << failed";
+ return TestFail;
+ }
+
+ exposure = 100ms;
+ ratio = exposure / 25ms;
+ if (ratio != 4.0) {
+ cerr << "utils::Duration failed ratio test";
+ return TestFail;
+ }
+
+ return TestPass;
+ }
+
int run()
{
/* utils::hex() test. */
@@ -236,6 +277,10 @@ protected:
if (testEnumerate() != TestPass)
return TestFail;
+ /* utils::Duration test. */
+ if (testDuration() != TestPass)
+ return TestFail;
+
return TestPass;
}
};