core/java/android/hardware/camera2/marshal/impl/MarshalQueryableCapabilityAndMaxSize.java

/*
 * Copyright (C) 2019 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.marshal.impl;

import android.hardware.camera2.marshal.MarshalQueryable;
import android.hardware.camera2.marshal.Marshaler;
import android.hardware.camera2.params.CapabilityAndMaxSize;
import android.hardware.camera2.utils.TypeReference;
import android.util.Size;

import java.nio.ByteBuffer;

import static android.hardware.camera2.impl.CameraMetadataNative.TYPE_INT32;
import static android.hardware.camera2.marshal.MarshalHelpers.SIZEOF_INT32;

/**
 * Marshal {@link CapabilityAndMaxSize} to/from {@link #TYPE_INT32} {@code x CapabilityAndMaxSize.COUNT}
 */
public class MarshalQueryableCapabilityAndMaxSize implements MarshalQueryable<CapabilityAndMaxSize> {
    private static final int SIZE = SIZEOF_INT32 * CapabilityAndMaxSize.COUNT;

    private class MarshalerCapabilityAndMaxSize extends Marshaler<CapabilityAndMaxSize> {
        protected MarshalerCapabilityAndMaxSize(TypeReference<CapabilityAndMaxSize> typeReference,
                                               int nativeType) {
            super(MarshalQueryableCapabilityAndMaxSize.this, typeReference, nativeType);
        }

        @Override
        public void marshal(CapabilityAndMaxSize value, ByteBuffer buffer) {
            Size maxStreamingSize = value.getMaxStreamingSize();

            buffer.putInt(value.getMode());
            buffer.putInt(maxStreamingSize.getWidth());
            buffer.putInt(maxStreamingSize.getHeight());
        }

        @Override
        public CapabilityAndMaxSize unmarshal(ByteBuffer buffer) {
            int mode = buffer.getInt();
            int maxWidth = buffer.getInt();
            int maxHeight = buffer.getInt();

            return new CapabilityAndMaxSize(mode, maxWidth, maxHeight);
        }

        @Override
        public int getNativeSize() {
            return SIZE;
        }
    }

    @Override
    public Marshaler<CapabilityAndMaxSize> createMarshaler(
            TypeReference<CapabilityAndMaxSize> managedType, int nativeType) {
        return new MarshalerCapabilityAndMaxSize(managedType, nativeType);
    }

    @Override
    public boolean isTypeMappingSupported(
            TypeReference<CapabilityAndMaxSize> managedType, int nativeType) {
        return nativeType == TYPE_INT32 &&
                (CapabilityAndMaxSize.class.equals(managedType.getType()));
    }
}