Proof of concept for C wrapper around C++ API.

cpp_api/opentime.h

@@ -69,6 +69,10 @@ class RationalTime
         value(0),
         rate(1)
     {}
+    RationalTime(const RationalTime& in):
+        value(in.value),
+        rate(in.rate)
+    {}
 
     // data
     rt_value_t value;

cpp_api/test_wrap.c

@@ -0,0 +1,21 @@
+#include <stdio.h>
+#include "wrap.h"
+
+int main(int argc, char**argv){
+    printf("Hello\n");
+
+    RationalTime* t1 = OTIO_RationalTime_new(1,24);
+    RationalTime* t2 = OTIO_RationalTime_new(10,24);
+    RationalTime* t3 = OTIO_RationalTime_add(t1, t2);
+    RationalTime* t4 = OTIO_RationalTime_rescaled_to(t3, 30);
+
+    printf("t3 = %g @ %g\n", OTIO_RationalTime_get_value(t3), OTIO_RationalTime_get_rate(t3));
+    printf("t4 = %g @ %g\n", OTIO_RationalTime_get_value(t4), OTIO_RationalTime_get_rate(t4));
+
+    OTIO_RationalTime_delete(t1);
+    OTIO_RationalTime_delete(t2);
+    OTIO_RationalTime_delete(t3);
+    OTIO_RationalTime_delete(t4);
+
+    return 0;
+}

cpp_api/test_wrap.sh

@@ -0,0 +1 @@
+c++ -std=c++11 test_wrap.c wrap.cpp opentime.cpp && ./a.out

cpp_api/wrap.cpp

@@ -0,0 +1,33 @@
+
+#include "wrap.h"
+
+#include "opentime.h"
+
+RationalTime* OTIO_RationalTime_new(double value, double rate) {
+    return (RationalTime*)new opentime::RationalTime(value, rate);
+}
+
+void OTIO_RationalTime_delete(RationalTime* t) {
+    delete (opentime::RationalTime*)t;
+}
+
+RationalTime* OTIO_RationalTime_add(RationalTime* a, RationalTime* b) {
+    opentime::RationalTime* result = new opentime::RationalTime(*(opentime::RationalTime*)a);
+    *result += *(opentime::RationalTime*)b;
+    return (RationalTime*)result;
+}
+
+RationalTime* OTIO_RationalTime_rescaled_to(RationalTime* t, double rate) {
+    opentime::RationalTime* result = new opentime::RationalTime(
+        ((opentime::RationalTime*)t)->rescaled_to(rate)
+    );
+    return (RationalTime*)result;
+}
+
+double OTIO_RationalTime_get_value(RationalTime* t) {
+    return ((opentime::RationalTime*)t)->value;
+}
+
+double OTIO_RationalTime_get_rate(RationalTime* t) {
+    return ((opentime::RationalTime*)t)->rate;
+}

cpp_api/wrap.h

@@ -0,0 +1,12 @@
+
+extern "C"
+{
+typedef void* RationalTime;
+
+RationalTime* OTIO_RationalTime_new(double value, double rate);
+void OTIO_RationalTime_delete(RationalTime* t);
+RationalTime* OTIO_RationalTime_add(RationalTime* a, RationalTime* b);
+RationalTime* OTIO_RationalTime_rescaled_to(RationalTime* t, double rate);
+double OTIO_RationalTime_get_value(RationalTime* t);
+double OTIO_RationalTime_get_rate(RationalTime* t);
+}