1 files changed, 96 insertions, 0 deletions
diff --git a/externals/oboe/samples/MegaDrone/src/main/cpp/native-lib.cpp b/externals/oboe/samples/MegaDrone/src/main/cpp/native-lib.cpp
new file mode 100644
index 0000000000..c5be92016a
--- /dev/null
+++ b/externals/oboe/samples/MegaDrone/src/main/cpp/native-lib.cpp
@@ -0,0 +1,96 @@
+/*
+ * Copyright 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <jni.h>
+#include <string>
+#include <vector>
+
+#include "MegaDroneEngine.h"
+
+
+std::vector<int> convertJavaArrayToVector(JNIEnv *env, jintArray intArray) {
+    std::vector<int> v;
+    jsize length = env->GetArrayLength(intArray);
+    if (length > 0) {
+        jint *elements = env->GetIntArrayElements(intArray, nullptr);
+        v.insert(v.end(), &elements[0], &elements[length]);
+        // Unpin the memory for the array, or free the copy.
+        env->ReleaseIntArrayElements(intArray, elements, 0);
+    }
+    return v;
+}
+
+extern "C" {
+/**
+ * Start the audio engine
+ *
+ * @param env
+ * @param instance
+ * @param jCpuIds - CPU core IDs which the audio process should affine to
+ * @return a pointer to the audio engine. This should be passed to other methods
+ */
+JNIEXPORT jlong JNICALL
+Java_com_google_oboe_samples_megadrone_MainActivity_startEngine(JNIEnv *env, jobject /*unused*/,
+                                                         jintArray jCpuIds) {
+    std::vector<int> cpuIds = convertJavaArrayToVector(env, jCpuIds);
+    LOGD("cpu ids size: %d", static_cast<int>(cpuIds.size()));
+    MegaDroneEngine  *engine = new MegaDroneEngine(std::move(cpuIds));
+
+    if (!engine->start()) {
+        LOGE("Failed to start MegaDrone Engine");
+        delete engine;
+        engine = nullptr;
+    } else  {
+        LOGD("Engine Started");
+    }
+    return reinterpret_cast<jlong>(engine);
+}
+
+JNIEXPORT void JNICALL
+Java_com_google_oboe_samples_megadrone_MainActivity_stopEngine(JNIEnv *env, jobject instance,
+        jlong jEngineHandle) {
+    auto engine = reinterpret_cast<MegaDroneEngine*>(jEngineHandle);
+    if (engine) {
+        engine->stop();
+        delete engine;
+    } else {
+        LOGD("Engine invalid, call startEngine() to create");
+    }
+}
+
+
+JNIEXPORT void JNICALL
+Java_com_google_oboe_samples_megadrone_MainActivity_tap(JNIEnv *env, jobject instance,
+        jlong jEngineHandle, jboolean isDown) {
+
+    auto *engine = reinterpret_cast<MegaDroneEngine*>(jEngineHandle);
+    if (engine) {
+        engine->tap(isDown);
+    } else {
+        LOGE("Engine handle is invalid, call createEngine() to create a new one");
+    }
+}
+
+JNIEXPORT void JNICALL
+Java_com_google_oboe_samples_megadrone_MainActivity_native_1setDefaultStreamValues(JNIEnv *env,
+                                                                            jclass type,
+                                                                            jint sampleRate,
+                                                                            jint framesPerBurst) {
+    oboe::DefaultStreamValues::SampleRate = (int32_t) sampleRate;
+    oboe::DefaultStreamValues::FramesPerBurst = (int32_t) framesPerBurst;
+}
+
+} // extern "C"