1 files changed, 98 insertions, 0 deletions
diff --git a/delegate/armnnDelegateJNI/src/armnn_delegate_jni.cpp b/delegate/armnnDelegateJNI/src/armnn_delegate_jni.cpp
new file mode 100644
index 0000000000..55cc066023
--- /dev/null
+++ b/delegate/armnnDelegateJNI/src/armnn_delegate_jni.cpp
@@ -0,0 +1,98 @@
+//
+// Copyright © 2022 Arm Ltd and Contributors. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include <armnn_delegate.hpp>
+#include <DelegateOptions.hpp>
+
+#if defined(ARMCOMPUTECL_ENABLED)
+#include <arm_compute/core/CL/OpenCL.h>
+#endif
+
+#include <jni.h>
+#include <string>
+
+extern "C" {
+
+/// Creates an Arm NN Delegate object.
+/// Options are passed in form of String arrays. For details about what options_keys and option_values
+/// are supported please see:
+//  armnnDelegate::DelegateOptions::DelegateOptions(char const* const*, char const* const*,size_t,void (*)(const char*))
+JNIEXPORT jlong
+JNICALL Java_com_arm_armnn_delegate_ArmnnDelegate_createDelegate(JNIEnv* env,
+                                                                 jclass clazz,
+                                                                 jobjectArray optionKeys,
+                                                                 jobjectArray optionValues)
+{
+    int numOptions = env->GetArrayLength(optionKeys);
+    const char* nativeOptionKeys[numOptions];
+    const char* nativeOptionValues[numOptions];
+
+    jstring jKeyStrings[numOptions];
+    jstring jValueStrings[numOptions];
+
+    // Convert java array of string into char so we can make use of it in cpp code
+    for (int i = 0; i < numOptions; i++)
+    {
+        jKeyStrings[i] = static_cast<jstring>(env->GetObjectArrayElement(optionKeys, i));
+        jValueStrings[i] = static_cast<jstring>(env->GetObjectArrayElement(optionValues, i));
+
+        nativeOptionKeys[i] = env->GetStringUTFChars(jKeyStrings[i], 0);
+        nativeOptionValues[i] = env->GetStringUTFChars(jValueStrings[i], 0);
+    }
+
+    armnnDelegate::DelegateOptions delegateOptions(nativeOptionKeys,
+                                                   nativeOptionValues,
+                                                   numOptions,
+                                                   nullptr);
+
+    // Release jni memory. After the delegate options are created there is no need to hold on to it anymore.
+    for (int i = 0; i < numOptions; i++)
+    {
+        env->ReleaseStringUTFChars(jKeyStrings[i], nativeOptionKeys[i]);
+        env->ReleaseStringUTFChars(jValueStrings[i], nativeOptionValues[i]);
+    }
+
+    return reinterpret_cast<jlong>(armnnDelegate::TfLiteArmnnDelegateCreate(delegateOptions));
+}
+
+/// Destroys a given Arm NN Delegate object
+JNIEXPORT void
+JNICALL Java_com_arm_armnn_delegate_ArmnnDelegate_deleteDelegate(JNIEnv* env, jclass clazz, jlong delegate)
+{
+    armnnDelegate::TfLiteArmnnDelegateDelete(reinterpret_cast<TfLiteDelegate*>(delegate));
+}
+
+/// Returns true if a Arm Mali GPU is detected.
+/// Can be used to ensure that GpuAcc is supported on a device.
+JNIEXPORT jboolean
+JNICALL Java_com_arm_armnn_delegate_ArmnnUtils_IsGpuAccSupported(JNIEnv* env, jclass clazz)
+{
+#if defined(ARMCOMPUTECL_ENABLED)
+    cl::Device device = cl::Device::getDefault();
+    char device_name[32];
+    cl_int err = clGetDeviceInfo(device.get(), CL_DEVICE_NAME, sizeof(device_name), &device_name, NULL);
+    if (err != CL_SUCCESS)
+    {
+        return false;
+    }
+    // search for "Mali" in the devices name
+    if (strstr(device_name, "Mali"))
+    {
+        return true;
+    }
+#endif
+    return false;
+}
+
+/// Returns true if the current device supports Neon instructions.
+/// Can be used to ensure the CpuAcc backend is supported.
+JNIEXPORT jboolean
+JNICALL Java_com_arm_armnn_delegate_ArmnnUtils_IsNeonDetected(JNIEnv* env, jclass clazz)
+{
+    return armnn::NeonDetected();
+}
+
+}
+