| /* |
| * Copyright (C) 2013 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. |
| */ |
| |
| package android.hardware.camera2.impl; |
| |
| import java.nio.ByteBuffer; |
| |
| public interface MetadataMarshalClass<T> { |
| |
| /** |
| * Marshal the specified object instance (value) into a byte buffer. |
| * |
| * @param value the value of type T that we wish to write into the byte buffer |
| * @param buffer the byte buffer into which the marshalled object will be written |
| * @param nativeType the native type, e.g. |
| * {@link android.hardware.camera2.impl.CameraMetadataNative#TYPE_BYTE TYPE_BYTE}. |
| * Guaranteed to be one for which isNativeTypeSupported returns true. |
| * @param sizeOnly if this is true, don't write to the byte buffer. calculate the size only. |
| * @return the size that needs to be written to the byte buffer |
| */ |
| int marshal(T value, ByteBuffer buffer, int nativeType, boolean sizeOnly); |
| |
| /** |
| * Unmarshal a new object instance from the byte buffer. |
| * @param buffer the byte buffer, from which we will read the object |
| * @param nativeType the native type, e.g. |
| * {@link android.hardware.camera2.impl.CameraMetadataNative#TYPE_BYTE TYPE_BYTE}. |
| * Guaranteed to be one for which isNativeTypeSupported returns true. |
| * @return a new instance of type T read from the byte buffer |
| */ |
| T unmarshal(ByteBuffer buffer, int nativeType); |
| |
| Class<T> getMarshalingClass(); |
| |
| /** |
| * Determines whether or not this marshaller supports this native type. Most marshallers |
| * will are likely to only support one type. |
| * |
| * @param nativeType the native type, e.g. |
| * {@link android.hardware.camera2.impl.CameraMetadataNative#TYPE_BYTE TYPE_BYTE} |
| * @return true if it supports, false otherwise |
| */ |
| boolean isNativeTypeSupported(int nativeType); |
| |
| public static int NATIVE_SIZE_DYNAMIC = -1; |
| |
| /** |
| * How many bytes T will take up if marshalled to/from nativeType |
| * @param nativeType the native type, e.g. |
| * {@link android.hardware.camera2.impl.CameraMetadataNative#TYPE_BYTE TYPE_BYTE} |
| * @return a size in bytes, or NATIVE_SIZE_DYNAMIC if the size is dynamic |
| */ |
| int getNativeSize(int nativeType); |
| } |