feat: audio resources

app/src/main/cpp/lockstep.cpp

@@ -30,15 +30,13 @@ extern "C" {
 JNIEXPORT jlong JNICALL
 Java_at_lockstep_pb_PlaybackEngine_native_1createEngine(
         JNIEnv *env,
-        jclass /*unused*/) {
-    /*
+        jclass /*unused*/, jstring filesDir) {
     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();
+    auto *engine = new(std::nothrow) PlaybackEngine(filesDirString);
     return reinterpret_cast<jlong>(engine);
 }
 
@@ -51,4 +49,13 @@ jlong engineHandle) {
 delete reinterpret_cast<PlaybackEngine *>(engineHandle);
 }
 
+JNIEXPORT void JNICALL
+Java_at_lockstep_pb_PlaybackEngine_native_1setDefaultStreamValues(JNIEnv *env,
+                                                                  jclass type,
+                                                                  jint sampleRate,
+                                                                  jint framesPerBurst) {
+    oboe::DefaultStreamValues::SampleRate = (int32_t) sampleRate;
+    oboe::DefaultStreamValues::FramesPerBurst = (int32_t) framesPerBurst;
+}
+
 } // extern "C"