CameraDeviceClient.h revision f1e98d857ec377f2c9b916073d40732e6ebb7ced 
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 int           submitRequest(sp<CaptureRequest> request,
67                                        bool streaming = false);
68    virtual status_t      cancelRequest(int requestId);
69
70    // Returns -EBUSY if device is not idle
71    virtual status_t      deleteStream(int streamId);
72
73    virtual status_t      createStream(
74            int width,
75            int height,
76            int format,
77            const sp<IGraphicBufferProducer>& bufferProducer);
78
79    // Create a request object from a template.
80    virtual status_t      createDefaultRequest(int templateId,
81                                               /*out*/
82                                               CameraMetadata* request);
83
84    // Get the static metadata for the camera
85    // -- Caller owns the newly allocated metadata
86    virtual status_t      getCameraInfo(/*out*/CameraMetadata* info);
87
88    // Wait until all the submitted requests have finished processing
89    virtual status_t      waitUntilIdle();
90
91    // Flush all active and pending requests as fast as possible
92    virtual status_t      flush();
93
94    /**
95     * Interface used by CameraService
96     */
97
98    CameraDeviceClient(const sp<CameraService>& cameraService,
99            const sp<ICameraDeviceCallbacks>& remoteCallback,
100            const String16& clientPackageName,
101            int cameraId,
102            int cameraFacing,
103            int clientPid,
104            uid_t clientUid,
105            int servicePid);
106    virtual ~CameraDeviceClient();
107
108    virtual status_t      initialize(camera_module_t *module);
109
110    virtual status_t      dump(int fd, const Vector<String16>& args);
111
112    /**
113     * Device listener interface
114     */
115
116    virtual void notifyIdle();
117    virtual void notifyError();
118    virtual void notifyShutter(int requestId, nsecs_t timestamp);
119
120    /**
121     * Interface used by independent components of CameraDeviceClient.
122     */
123protected:
124    /** FilteredListener implementation **/
125    virtual void          onFrameAvailable(int32_t requestId,
126                                           const CameraMetadata& frame);
127    virtual void          detachDevice();
128
129    // Calculate the ANativeWindow transform from android.sensor.orientation
130    status_t              getRotationTransformLocked(/*out*/int32_t* transform);
131
132private:
133    /** ICameraDeviceUser interface-related private members */
134
135    /** Preview callback related members */
136    sp<camera2::FrameProcessorBase> mFrameProcessor;
137    static const int32_t FRAME_PROCESSOR_LISTENER_MIN_ID = 0;
138    static const int32_t FRAME_PROCESSOR_LISTENER_MAX_ID = 0x7fffffffL;
139
140    /** Utility members */
141    bool enforceRequestPermissions(CameraMetadata& metadata);
142
143    // IGraphicsBufferProducer binder -> Stream ID
144    KeyedVector<sp<IBinder>, int> mStreamMap;
145
146    // Stream ID
147    Vector<int> mStreamingRequestList;
148
149    int32_t mRequestIdCounter;
150};
151
152}; // namespace android
153
154#endif
155