| /* Copyright 2020 The TensorFlow Authors. All Rights Reserved. |
| |
| 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. |
| ==============================================================================*/ |
| |
| package org.tensorflow.lite.support.model; |
| |
| import android.util.Log; |
| import java.io.Closeable; |
| import java.io.IOException; |
| import org.checkerframework.checker.nullness.qual.Nullable; |
| import org.tensorflow.lite.Delegate; |
| |
| /** |
| * Helper class to create and call necessary methods of {@code GpuDelegate} which is not a strict |
| * dependency. |
| */ |
| class GpuDelegateProxy implements Delegate, Closeable { |
| |
| private static final String TAG = "GpuDelegateProxy"; |
| |
| private final Delegate proxiedDelegate; |
| private final Closeable proxiedCloseable; |
| |
| @Nullable |
| public static GpuDelegateProxy maybeNewInstance() { |
| try { |
| Class<?> clazz = Class.forName("org.tensorflow.lite.gpu.GpuDelegate"); |
| Object instance = clazz.getDeclaredConstructor().newInstance(); |
| return new GpuDelegateProxy(instance); |
| } catch (ReflectiveOperationException e) { |
| Log.e(TAG, "Failed to create the GpuDelegate dynamically.", e); |
| return null; |
| } |
| } |
| |
| /** Calls {@code close()} method of the delegate. */ |
| @Override |
| public void close() { |
| try { |
| proxiedCloseable.close(); |
| } catch (IOException e) { |
| // Should not trigger, because GpuDelegate#close never throws. The catch is required because |
| // of Closeable#close. |
| Log.e(TAG, "Failed to close the GpuDelegate.", e); |
| } |
| } |
| |
| /** Calls {@code getNativeHandle()} method of the delegate. */ |
| @Override |
| public long getNativeHandle() { |
| return proxiedDelegate.getNativeHandle(); |
| } |
| |
| private GpuDelegateProxy(Object instance) { |
| this.proxiedCloseable = (Closeable) instance; |
| this.proxiedDelegate = (Delegate) instance; |
| } |
| } |