initial: oboe, logging

app/src/main/cpp/lockstep.cpp

@@ -0,0 +1,54 @@
+// Write C++ code here.
+//
+// Do not forget to dynamically load the C++ library into your application.
+//
+// For instance,
+//
+// In at.lockstep.app.MainActivity.java:
+//    static {
+//       System.loadLibrary("lockstep");
+//    }
+//
+// Or, in at.lockstep.app.MainActivity.kt:
+//    companion object {
+//      init {
+//         System.loadLibrary("lockstep")
+//      }
+//    }
+
+#include "PlaybackEngine.h"
+#include <jni.h>
+#include <oboe/Oboe.h>
+
+extern "C" {
+
+/**
+ * Creates the audio engine
+ *
+ * @return a pointer to the audio engine. This should be passed to other methods
+ */
+JNIEXPORT jlong JNICALL
+Java_at_lockstep_pb_PlaybackEngine_native_1createEngine(
+        JNIEnv *env,
+        jclass /*unused*/) {
+    /*
+    const char* filesDirTemp = env->GetStringUTFChars(filesDir, NULL);
+    std::string filesDirString(filesDirTemp);
+    env->ReleaseStringUTFChars(filesDir, filesDirTemp);
+    */
+
+    // We use std::nothrow so `new` returns a nullptr if the engine creation fails
+    auto *engine = new(std::nothrow) PlaybackEngine();
+    return reinterpret_cast<jlong>(engine);
+}
+
+JNIEXPORT void JNICALL
+Java_at_lockstep_pb_PlaybackEngine_native_1deleteEngine(
+        JNIEnv *env,
+jclass,
+jlong engineHandle) {
+
+delete reinterpret_cast<PlaybackEngine *>(engineHandle);
+}
+
+} // extern "C"