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/*
* 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"
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