Diff: frameRates.h

Revision:

0:97661408d0f9

Child:

9:7214e3c3e5f8

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/frameRates.h	Fri Jan 15 11:49:01 2021 +0000
@@ -0,0 +1,53 @@
+#ifndef __frameRates_h__
+#define __frameRates_h__
+
+namespace frameRateInfo {
+
+  const float FrameRates[] = {0,     23.976, 24, 25,    29.97, 30,
+                      47.95, 48,     50, 59.94, 60,    10000000};
+
+/// us                      
+const double FramePeriods[] = {1000000,         1000000 / 23.976, 1000000 / 24,
+                         1000000 / 25,    1000000 / 29.97,  1000000 / 30,
+                         1000000 / 47.95, 1000000 / 48,     1000000 / 50,
+                         1000000 / 59.94, 1000000 / 60,     10};
+
+const int numberOfRates = 11;
+}
+
+class frameRates {
+
+public:
+
+frameRates();
+
+    void setRate(int index);
+    void setDrop(bool drop) {_currentDrop = drop;};
+    bool isSyncable();
+    bool isValid() {return _currentRate!=0;};
+
+const char *frameRateString();
+// gets time since the start of the second in us.
+// in some frame drop modes this could be negative.
+static long getOffsetFromSecondStart(int minutes, int seconds, int frame,
+                              int rateIndex, bool frameDrop);
+
+// gets time since the start of the second in us.
+// in some frame drop modes this could be negative.
+long getOffsetFromSecondStart(int minutes, int seconds, int frame);
+
+
+    float currentRate() {return _currentRate;};
+    double currentPeriodUS() {return _currentPeriod;};
+    int currentIndex() {return _currentIndex;};
+    bool currentDrop() {return _currentDrop;};
+
+private:
+float _currentRate;
+double _currentPeriod;
+int _currentIndex;
+bool _currentDrop;
+};
+
+
+#endif