CameraDeviceClient.h revision cb0652e5a850b2fcd919e977247e87239efaf70e 
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    // Returns -EBUSY if device is not idle
80    virtual status_t      deleteStream(int streamId);
81
82    virtual status_t      createStream(
83            int width,
84            int height,
85            int format,
86            const sp<IGraphicBufferProducer>& bufferProducer);
87
88    // Create a request object from a template.
89    virtual status_t      createDefaultRequest(int templateId,
90                                               /*out*/
91                                               CameraMetadata* request);
92
93    // Get the static metadata for the camera
94    // -- Caller owns the newly allocated metadata
95    virtual status_t      getCameraInfo(/*out*/CameraMetadata* info);
96
97    // Wait until all the submitted requests have finished processing
98    virtual status_t      waitUntilIdle();
99
100    // Flush all active and pending requests as fast as possible
101    virtual status_t      flush(/*out*/
102                                int64_t* lastFrameNumber = NULL);
103
104    /**
105     * Interface used by CameraService
106     */
107
108    CameraDeviceClient(const sp<CameraService>& cameraService,
109            const sp<ICameraDeviceCallbacks>& remoteCallback,
110            const String16& clientPackageName,
111            int cameraId,
112            int cameraFacing,
113            int clientPid,
114            uid_t clientUid,
115            int servicePid);
116    virtual ~CameraDeviceClient();
117
118    virtual status_t      initialize(camera_module_t *module);
119
120    virtual status_t      dump(int fd, const Vector<String16>& args);
121
122    /**
123     * Device listener interface
124     */
125
126    virtual void notifyIdle();
127    virtual void notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode,
128                             const CaptureResultExtras& resultExtras);
129    virtual void notifyShutter(const CaptureResultExtras& resultExtras, nsecs_t timestamp);
130
131    /**
132     * Interface used by independent components of CameraDeviceClient.
133     */
134protected:
135    /** FilteredListener implementation **/
136    virtual void          onResultAvailable(const CaptureResult& result);
137    virtual void          detachDevice();
138
139    // Calculate the ANativeWindow transform from android.sensor.orientation
140    status_t              getRotationTransformLocked(/*out*/int32_t* transform);
141
142private:
143    /** ICameraDeviceUser interface-related private members */
144
145    /** Preview callback related members */
146    sp<camera2::FrameProcessorBase> mFrameProcessor;
147    static const int32_t FRAME_PROCESSOR_LISTENER_MIN_ID = 0;
148    static const int32_t FRAME_PROCESSOR_LISTENER_MAX_ID = 0x7fffffffL;
149
150    /** Utility members */
151    bool enforceRequestPermissions(CameraMetadata& metadata);
152
153    // IGraphicsBufferProducer binder -> Stream ID
154    KeyedVector<sp<IBinder>, int> mStreamMap;
155
156    // Stream ID
157    Vector<int> mStreamingRequestList;
158
159    int32_t mRequestIdCounter;
160};
161
162}; // namespace android
163
164#endif
165