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 
MarshalerStreamConfigurationDuration( TypeReference<StreamConfigurationDuration> typeReference, int nativeType)48         protected MarshalerStreamConfigurationDuration(
49                 TypeReference<StreamConfigurationDuration> typeReference, int nativeType) {
50             super(MarshalQueryableStreamConfigurationDuration.this, typeReference, nativeType);
51         }
52 
53         @Override
marshal(StreamConfigurationDuration value, ByteBuffer buffer)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
unmarshal(ByteBuffer buffer)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
getNativeSize()72         public int getNativeSize() {
73             return SIZE;
74         }
75     }
76 
77     @Override
createMarshaler( TypeReference<StreamConfigurationDuration> managedType, int nativeType)78     public Marshaler<StreamConfigurationDuration> createMarshaler(
79             TypeReference<StreamConfigurationDuration> managedType, int nativeType) {
80         return new MarshalerStreamConfigurationDuration(managedType, nativeType);
81     }
82 
83     @Override
isTypeMappingSupported(TypeReference<StreamConfigurationDuration> managedType, int nativeType)84     public boolean isTypeMappingSupported(TypeReference<StreamConfigurationDuration> managedType,
85             int nativeType) {
86         return nativeType == TYPE_INT64 &&
87                 (StreamConfigurationDuration.class.equals(managedType.getType()));
88     }
89 
90 }