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      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 android.hardware.camera2.marshal.Marshaler;
     19 import android.hardware.camera2.marshal.MarshalQueryable;
     20 import android.hardware.camera2.params.StreamConfigurationDuration;
     21 import android.hardware.camera2.utils.TypeReference;
     22 
     23 import static android.hardware.camera2.impl.CameraMetadataNative.*;
     24 import static android.hardware.camera2.marshal.MarshalHelpers.*;
     25 
     26 import java.nio.ByteBuffer;
     27 
     28 /**
     29  * Marshaler for custom class {@link StreamConfigurationDuration} for min-frame and stall durations.
     30  *
     31  * <p>
     32  * Data is stored as {@code (format, width, height, durationNs)} tuples (int64).
     33  * </p>
     34  */
     35 public class MarshalQueryableStreamConfigurationDuration
     36         implements MarshalQueryable<StreamConfigurationDuration> {
     37 
     38     private static final int SIZE = SIZEOF_INT64 * 4;
     39     /**
     40      * Values and-ed with this will do an unsigned int to signed long conversion;
     41      * in other words the sign bit from the int will not be extended.
     42      * */
     43     private static final long MASK_UNSIGNED_INT = 0x00000000ffffffffL;
     44 
     45     private class MarshalerStreamConfigurationDuration
     46         extends Marshaler<StreamConfigurationDuration> {
     47 
     48         protected MarshalerStreamConfigurationDuration(
     49                 TypeReference<StreamConfigurationDuration> typeReference, int nativeType) {
     50             super(MarshalQueryableStreamConfigurationDuration.this, typeReference, nativeType);
     51         }
     52 
     53         @Override
     54         public void marshal(StreamConfigurationDuration value, ByteBuffer buffer) {
     55             buffer.putLong(value.getFormat() & MASK_UNSIGNED_INT); // unsigned int -> long
     56             buffer.putLong(value.getWidth());
     57             buffer.putLong(value.getHeight());
     58             buffer.putLong(value.getDuration());
     59         }
     60 
     61         @Override
     62         public StreamConfigurationDuration unmarshal(ByteBuffer buffer) {
     63             int format = (int)buffer.getLong();
     64             int width = (int)buffer.getLong();
     65             int height = (int)buffer.getLong();
     66             long durationNs = buffer.getLong();
     67 
     68             return new StreamConfigurationDuration(format, width, height, durationNs);
     69         }
     70 
     71         @Override
     72         public int getNativeSize() {
     73             return SIZE;
     74         }
     75     }
     76 
     77     @Override
     78     public Marshaler<StreamConfigurationDuration> createMarshaler(
     79             TypeReference<StreamConfigurationDuration> managedType, int nativeType) {
     80         return new MarshalerStreamConfigurationDuration(managedType, nativeType);
     81     }
     82 
     83     @Override
     84     public boolean isTypeMappingSupported(TypeReference<StreamConfigurationDuration> managedType,
     85             int nativeType) {
     86         return nativeType == TYPE_INT64 &&
     87                 (StreamConfigurationDuration.class.equals(managedType.getType()));
     88     }
     89 
     90 }