feat: audio resources

app/src/main/cpp/PlaybackEngine.cpp

@@ -7,7 +7,7 @@
 #include "PlaybackEngine.h"
 #include "logging.h"
 
-PlaybackEngine::PlaybackEngine() {
+PlaybackEngine::PlaybackEngine(std::string filesDir): mFilesDir(filesDir) {
     LOGI("PlaybackEngine()");
     LOGI("NDK LOG_LEVEL=%d", LOG_LEVEL);
     // NDK LOG_LEVEL=3  (DEBUG)

app/src/main/cpp/PlaybackEngine.h

@@ -6,13 +6,15 @@
 #define LOCKSTEP_PLAYBACKENGINE_H
 
 #include "OboeSinePlayer.h"
+#include <string>
 
 class PlaybackEngine {
 public:
-    PlaybackEngine();
+    PlaybackEngine(std::string filesDir);
     virtual ~PlaybackEngine();
 private:
     OboeSinePlayer *mPlayer;
+    std::string mFilesDir;
 };
 
 #endif //LOCKSTEP_PLAYBACKENGINE_H

app/src/main/cpp/jni_bridge.cpp

@@ -4,9 +4,12 @@
 
 #include <jni.h>
 #include "mpg123.h"
+#include <oboe/Oboe.h>
 
 extern "C" {
 
+// nice-to: merge with lockstep.cpp
+
 JNIEXPORT jint JNICALL
 Java_at_lockstep_pb_PlaybackEngine_native_1mpg123_1init
         (JNIEnv *env, jclass) {

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"