1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package android.hardware.camera2.marshal.impl; 17 18 import static android.hardware.camera2.impl.CameraMetadataNative.*; 19 import static android.hardware.camera2.marshal.MarshalHelpers.*; 20 21 import android.hardware.camera2.marshal.Marshaler; 22 import android.hardware.camera2.marshal.MarshalQueryable; 23 import android.hardware.camera2.utils.TypeReference; 24 25 import java.nio.ByteBuffer; 26 27 /** 28 * Marshal fake native enums (ints): TYPE_BYTE <-> int/Integer 29 */ 30 public class MarshalQueryableNativeByteToInteger implements MarshalQueryable<Integer> { 31 32 private static final int UINT8_MASK = (1 << Byte.SIZE) - 1; 33 34 private class MarshalerNativeByteToInteger extends Marshaler<Integer> { 35 protected MarshalerNativeByteToInteger(TypeReference<Integer> typeReference, 36 int nativeType) { 37 super(MarshalQueryableNativeByteToInteger.this, typeReference, nativeType); 38 } 39 40 @Override 41 public void marshal(Integer value, ByteBuffer buffer) { 42 buffer.put((byte)(int)value); // truncate down to byte 43 } 44 45 @Override 46 public Integer unmarshal(ByteBuffer buffer) { 47 // expand unsigned byte to int; avoid sign extension 48 return buffer.get() & UINT8_MASK; 49 } 50 51 @Override 52 public int getNativeSize() { 53 return SIZEOF_BYTE; 54 } 55 } 56 57 @Override 58 public Marshaler<Integer> createMarshaler(TypeReference<Integer> managedType, 59 int nativeType) { 60 return new MarshalerNativeByteToInteger(managedType, nativeType); 61 } 62 63 @Override 64 public boolean isTypeMappingSupported(TypeReference<Integer> managedType, int nativeType) { 65 return (Integer.class.equals(managedType.getType()) 66 || int.class.equals(managedType.getType())) && nativeType == TYPE_BYTE; 67 } 68 69 70 } 71
