CameraDeviceClient.h revision 3d82c0d9ed2b3e956ad699a9ca2c8a70c9d24678 
1/*
2 * Copyright (C) 2013 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_PHOTOGRAPHY_CAMERADEVICECLIENT_H
18#define ANDROID_SERVERS_CAMERA_PHOTOGRAPHY_CAMERADEVICECLIENT_H
19
20#include <camera/camera2/ICameraDeviceUser.h>
21#include <camera/camera2/ICameraDeviceCallbacks.h>
22
23#include "CameraService.h"
24#include "common/FrameProcessorBase.h"
25#include "common/Camera2ClientBase.h"
26
27namespace android {
28
29struct CameraDeviceClientBase :
30        public CameraService::BasicClient, public BnCameraDeviceUser
31{
32    typedef ICameraDeviceCallbacks TCamCallbacks;
33
34    const sp<ICameraDeviceCallbacks>& getRemoteCallback() {
35        return mRemoteCallback;
36    }
37
38protected:
39    CameraDeviceClientBase(const sp<CameraService>& cameraService,
40            const sp<ICameraDeviceCallbacks>& remoteCallback,
41            const String16& clientPackageName,
42            int cameraId,
43            int cameraFacing,
44            int clientPid,
45            uid_t clientUid,
46            int servicePid);
47
48    sp<ICameraDeviceCallbacks> mRemoteCallback;
49};
50
51/**
52 * Implements the binder ICameraDeviceUser API,
53 * meant for HAL3-public implementation of
54 * android.hardware.photography.CameraDevice
55 */
56class CameraDeviceClient :
57        public Camera2ClientBase<CameraDeviceClientBase>,
58        public camera2::FrameProcessorBase::FilteredListener
59{
60public:
61    /**
62     * ICameraDeviceUser interface (see ICameraDeviceUser for details)
63     */
64
65    // Note that the callee gets a copy of the metadata.
66    virtual status_t           submitRequest(sp<CaptureRequest> request,
67                                             bool streaming = false,
68                                             /*out*/
69                                             int64_t* lastFrameNumber = NULL);
70    // List of requests are copied.
71    virtual status_t           submitRequestList(List<sp<CaptureRequest> > requests,
72                                                 bool streaming = false,
73                                                 /*out*/
74                                                 int64_t* lastFrameNumber = NULL);
75    virtual status_t      cancelRequest(int requestId,
76                                        /*out*/
77                                        int64_t* lastFrameNumber = NULL);
78
79    virtual status_t beginConfigure();
80
81    virtual status_t endConfigure();
82
83    // Returns -EBUSY if device is not idle
84    virtual status_t      deleteStream(int streamId);
85
86    virtual status_t      createStream(
87            const sp<IGraphicBufferProducer>& bufferProducer);
88
89    // Create a request object from a template.
90    virtual status_t      createDefaultRequest(int templateId,
91                                               /*out*/
92                                               CameraMetadata* request);
93
94    // Get the static metadata for the camera
95    // -- Caller owns the newly allocated metadata
96    virtual status_t      getCameraInfo(/*out*/CameraMetadata* info);
97
98    // Wait until all the submitted requests have finished processing
99    virtual status_t      waitUntilIdle();
100
101    // Flush all active and pending requests as fast as possible
102    virtual status_t      flush(/*out*/
103                                int64_t* lastFrameNumber = NULL);
104
105    /**
106     * Interface used by CameraService
107     */
108
109    CameraDeviceClient(const sp<CameraService>& cameraService,
110            const sp<ICameraDeviceCallbacks>& remoteCallback,
111            const String16& clientPackageName,
112            int cameraId,
113            int cameraFacing,
114            int clientPid,
115            uid_t clientUid,
116            int servicePid);
117    virtual ~CameraDeviceClient();
118
119    virtual status_t      initialize(CameraModule *module);
120
121    virtual status_t      dump(int fd, const Vector<String16>& args);
122
123    /**
124     * Device listener interface
125     */
126
127    virtual void notifyIdle();
128    virtual void notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode,
129                             const CaptureResultExtras& resultExtras);
130    virtual void notifyShutter(const CaptureResultExtras& resultExtras, nsecs_t timestamp);
131
132    /**
133     * Interface used by independent components of CameraDeviceClient.
134     */
135protected:
136    /** FilteredListener implementation **/
137    virtual void          onResultAvailable(const CaptureResult& result);
138    virtual void          detachDevice();
139
140    // Calculate the ANativeWindow transform from android.sensor.orientation
141    status_t              getRotationTransformLocked(/*out*/int32_t* transform);
142
143private:
144    /** ICameraDeviceUser interface-related private members */
145
146    /** Preview callback related members */
147    sp<camera2::FrameProcessorBase> mFrameProcessor;
148    static const int32_t FRAME_PROCESSOR_LISTENER_MIN_ID = 0;
149    static const int32_t FRAME_PROCESSOR_LISTENER_MAX_ID = 0x7fffffffL;
150
151    /** Utility members */
152    bool enforceRequestPermissions(CameraMetadata& metadata);
153
154    // Find the square of the euclidean distance between two points
155    static int64_t euclidDistSquare(int32_t x0, int32_t y0, int32_t x1, int32_t y1);
156
157    // Find the closest dimensions for a given format in available stream configurations with
158    // a width <= ROUNDING_WIDTH_CAP
159    static const int32_t ROUNDING_WIDTH_CAP = 1080;
160    static bool roundBufferDimensionNearest(int32_t width, int32_t height, int32_t format,
161            android_dataspace dataSpace, const CameraMetadata& info,
162            /*out*/int32_t* outWidth, /*out*/int32_t* outHeight);
163
164    // IGraphicsBufferProducer binder -> Stream ID
165    KeyedVector<sp<IBinder>, int> mStreamMap;
166
167    // Stream ID
168    Vector<int> mStreamingRequestList;
169
170    int32_t mRequestIdCounter;
171};
172
173}; // namespace android
174
175#endif
176