Initial pure C++ implementation

tests/test_headers.c

@@ -0,0 +1,22 @@
+/* The public headers must stay valid C: this translation unit is compiled as C
+ * and never linked, so it fails the build if a header stops being C-compatible. */
+#include "joc_core.h"
+#include "joc_stream.h"
+
+int joc_header_c_probe(void) {
+    joc_task_config task = {0};
+    joc_stream_config stream = {0};
+    joc_event_sink sink = {0};
+    joc_event event = {0};
+    joc_task_result result = {0};
+    joc_emdf_info emdf = {0};
+    joc_frame_params params = {0};
+    (void)task;
+    (void)stream;
+    (void)sink;
+    (void)event;
+    (void)result;
+    (void)emdf;
+    (void)params;
+    return (int)JOC_FRAME_SAMPLES + (int)JOC_STREAM_IN_CORE_PCM;
+}