Android JNI Intro - Java Call Jni Example

 

  MainActivity.java

public native int nativePushCameraData(byte[]data, int len);



Native-lib.cpp

extern "C"
JNIEXPORT int JNICALL
Java_com_example_MainActivity_nativePushCameraData(
        JNIEnv *env,
        jobject /* this */,
        jbyteArray buf, jint len
) {
    uint8_t * data;

    data = (uint8_t *)env->GetByteArrayElements(buf, 0);

    magics::TaskNode *node = gfreeQueue.Dequeue();
    if(node == nullptr) {
        node = gtaskQueue.Dequeue();
        if(node == nullptr) return 0;
    }

    magics::TaskZone *zone = node->mTaskZone;
    zone->tasktype = magics::enum_task_data;
    zone->datatype = magics::enum_data_rgb;
    memcpy(zone->vframe, data, len);


    gtaskQueue.EnqueueWithSignal(node);

    env->ReleaseByteArrayElements(buf, (jbyte *)data, 0);

    return 0;
}