1 /*
2  * Copyright (C) 2012 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 
17 #ifndef ANDROID_SERVERS_CAMERA_CAMERA2_FRAMEPROCESSOR_H
18 #define ANDROID_SERVERS_CAMERA_CAMERA2_FRAMEPROCESSOR_H
19 
20 #include <utils/Thread.h>
21 #include <utils/String16.h>
22 #include <utils/Vector.h>
23 #include <utils/KeyedVector.h>
24 #include <utils/List.h>
25 #include <camera/CameraMetadata.h>
26 
27 #include "common/FrameProcessorBase.h"
28 
29 struct camera_frame_metadata;
30 
31 namespace android {
32 
33 class Camera2Client;
34 
35 namespace camera2 {
36 
37 /* Output frame metadata processing thread.  This thread waits for new
38  * frames from the device, and analyzes them as necessary.
39  */
40 class FrameProcessor : public FrameProcessorBase {
41   public:
42     FrameProcessor(wp<CameraDeviceBase> device, sp<Camera2Client> client);
43     ~FrameProcessor();
44 
45   private:
46     static const int32_t NOT_SET = -1;
47 
48     wp<Camera2Client> mClient;
49 
50     bool mSynthesize3ANotify;
51 
52     int mLastFrameNumberOfFaces;
53 
54     void processNewFrames(const sp<Camera2Client> &client);
55 
56     virtual bool processSingleFrame(CaptureResult &frame,
57                                     const sp<CameraDeviceBase> &device);
58 
59     status_t processFaceDetect(const CameraMetadata &frame,
60             const sp<Camera2Client> &client);
61 
62     // Send 3A state change notifications to client based on frame metadata
63     status_t process3aState(const CaptureResult &frame,
64             const sp<Camera2Client> &client);
65 
66     // Helper for process3aState
67     template<typename Src, typename T>
68     bool updatePendingState(const CameraMetadata& result, int32_t tag, T* value,
69             int32_t frameNumber, int cameraId);
70 
71 
72     struct AlgState {
73         // TODO: also track AE mode
74         camera_metadata_enum_android_control_af_mode   afMode;
75         camera_metadata_enum_android_control_awb_mode  awbMode;
76 
77         camera_metadata_enum_android_control_ae_state  aeState;
78         camera_metadata_enum_android_control_af_state  afState;
79         camera_metadata_enum_android_control_awb_state awbState;
80 
81         int32_t                                        afTriggerId;
82         int32_t                                        aeTriggerId;
83 
84         // These defaults need to match those in Parameters.cpp
AlgStateAlgState85         AlgState() :
86                 afMode((camera_metadata_enum_android_control_af_mode)NOT_SET),
87                 awbMode((camera_metadata_enum_android_control_awb_mode)NOT_SET),
88                 aeState((camera_metadata_enum_android_control_ae_state)NOT_SET),
89                 afState((camera_metadata_enum_android_control_af_state)NOT_SET),
90                 awbState((camera_metadata_enum_android_control_awb_state)NOT_SET),
91                 afTriggerId(NOT_SET),
92                 aeTriggerId(NOT_SET) {
93         }
94     };
95 
96     AlgState m3aState;
97 
98     // frame number -> pending 3A states that not all data are received yet.
99     KeyedVector<int32_t, AlgState> mPending3AStates;
100 
101     // Whether the partial result is enabled for this device
102     bool mUsePartialResult;
103 
104     // Track most recent frame number for which 3A notifications were sent for.
105     // Used to filter against sending 3A notifications for the same frame
106     // several times.
107     int32_t mLast3AFrameNumber;
108 
109     // Emit FaceDetection event to java if faces changed
110     void callbackFaceDetection(sp<Camera2Client> client,
111                                const camera_frame_metadata &metadata);
112 };
113 
114 
115 }; //namespace camera2
116 }; //namespace android
117 
118 #endif
119