CameraDeviceClient.h revision e8c535e833ed135895e99ca81aa3b85d80d7cf3c 
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 <android/hardware/camera2/BnCameraDeviceUser.h>
21#include <android/hardware/camera2/ICameraDeviceCallbacks.h>
22#include <camera/camera2/OutputConfiguration.h>
23#include <camera/camera2/SubmitInfo.h>
24
25#include "CameraService.h"
26#include "common/FrameProcessorBase.h"
27#include "common/Camera2ClientBase.h"
28
29namespace android {
30
31struct CameraDeviceClientBase :
32         public CameraService::BasicClient,
33         public hardware::camera2::BnCameraDeviceUser
34{
35    typedef hardware::camera2::ICameraDeviceCallbacks TCamCallbacks;
36
37    const sp<hardware::camera2::ICameraDeviceCallbacks>& getRemoteCallback() {
38        return mRemoteCallback;
39    }
40
41protected:
42    CameraDeviceClientBase(const sp<CameraService>& cameraService,
43            const sp<hardware::camera2::ICameraDeviceCallbacks>& remoteCallback,
44            const String16& clientPackageName,
45            int cameraId,
46            int cameraFacing,
47            int clientPid,
48            uid_t clientUid,
49            int servicePid);
50
51    sp<hardware::camera2::ICameraDeviceCallbacks> mRemoteCallback;
52};
53
54/**
55 * Implements the binder ICameraDeviceUser API,
56 * meant for HAL3-public implementation of
57 * android.hardware.photography.CameraDevice
58 */
59class CameraDeviceClient :
60        public Camera2ClientBase<CameraDeviceClientBase>,
61        public camera2::FrameProcessorBase::FilteredListener
62{
63public:
64    /**
65     * ICameraDeviceUser interface (see ICameraDeviceUser for details)
66     */
67
68    // Note that the callee gets a copy of the metadata.
69    virtual binder::Status submitRequest(
70            const hardware::camera2::CaptureRequest& request,
71            bool streaming = false,
72            /*out*/
73            hardware::camera2::utils::SubmitInfo *submitInfo = nullptr);
74    // List of requests are copied.
75    virtual binder::Status submitRequestList(
76            const std::vector<hardware::camera2::CaptureRequest>& requests,
77            bool streaming = false,
78            /*out*/
79            hardware::camera2::utils::SubmitInfo *submitInfo = nullptr);
80    virtual binder::Status cancelRequest(int requestId,
81            /*out*/
82            int64_t* lastFrameNumber = NULL);
83
84    virtual binder::Status beginConfigure();
85
86    virtual binder::Status endConfigure(bool isConstrainedHighSpeed = false);
87
88    // Returns -EBUSY if device is not idle
89    virtual binder::Status deleteStream(int streamId);
90
91    virtual binder::Status createStream(
92            const hardware::camera2::params::OutputConfiguration &outputConfiguration,
93            /*out*/
94            int32_t* newStreamId = NULL);
95
96    // Create an input stream of width, height, and format.
97    virtual binder::Status createInputStream(int width, int height, int format,
98            /*out*/
99            int32_t* newStreamId = NULL);
100
101    // Get the buffer producer of the input stream
102    virtual binder::Status getInputSurface(
103            /*out*/
104            view::Surface *inputSurface);
105
106    // Create a request object from a template.
107    virtual binder::Status createDefaultRequest(int templateId,
108            /*out*/
109            hardware::camera2::impl::CameraMetadataNative* request);
110
111    // Get the static metadata for the camera
112    // -- Caller owns the newly allocated metadata
113    virtual binder::Status getCameraInfo(
114            /*out*/
115            hardware::camera2::impl::CameraMetadataNative* cameraCharacteristics);
116
117    // Wait until all the submitted requests have finished processing
118    virtual binder::Status waitUntilIdle();
119
120    // Flush all active and pending requests as fast as possible
121    virtual binder::Status flush(
122            /*out*/
123            int64_t* lastFrameNumber = NULL);
124
125    // Prepare stream by preallocating its buffers
126    virtual binder::Status prepare(int32_t streamId);
127
128    // Tear down stream resources by freeing its unused buffers
129    virtual binder::Status tearDown(int32_t streamId);
130
131    // Prepare stream by preallocating up to maxCount of its buffers
132    virtual binder::Status prepare2(int32_t maxCount, int32_t streamId);
133
134    /**
135     * Interface used by CameraService
136     */
137
138    CameraDeviceClient(const sp<CameraService>& cameraService,
139            const sp<hardware::camera2::ICameraDeviceCallbacks>& remoteCallback,
140            const String16& clientPackageName,
141            int cameraId,
142            int cameraFacing,
143            int clientPid,
144            uid_t clientUid,
145            int servicePid);
146    virtual ~CameraDeviceClient();
147
148    virtual status_t      initialize(CameraModule *module);
149
150    virtual status_t      dump(int fd, const Vector<String16>& args);
151
152    virtual status_t      dumpClient(int fd, const Vector<String16>& args);
153
154    /**
155     * Device listener interface
156     */
157
158    virtual void notifyIdle();
159    virtual void notifyError(int32_t errorCode,
160                             const CaptureResultExtras& resultExtras);
161    virtual void notifyShutter(const CaptureResultExtras& resultExtras, nsecs_t timestamp);
162    virtual void notifyPrepared(int streamId);
163    virtual void notifyRepeatingRequestError(long lastFrameNumber);
164
165    /**
166     * Interface used by independent components of CameraDeviceClient.
167     */
168protected:
169    /** FilteredListener implementation **/
170    virtual void          onResultAvailable(const CaptureResult& result);
171    virtual void          detachDevice();
172
173    // Calculate the ANativeWindow transform from android.sensor.orientation
174    status_t              getRotationTransformLocked(/*out*/int32_t* transform);
175
176private:
177    /** ICameraDeviceUser interface-related private members */
178
179    /** Preview callback related members */
180    sp<camera2::FrameProcessorBase> mFrameProcessor;
181    static const int32_t FRAME_PROCESSOR_LISTENER_MIN_ID = 0;
182    static const int32_t FRAME_PROCESSOR_LISTENER_MAX_ID = 0x7fffffffL;
183
184    /** Utility members */
185    binder::Status checkPidStatus(const char* checkLocation);
186    bool enforceRequestPermissions(CameraMetadata& metadata);
187
188    // Find the square of the euclidean distance between two points
189    static int64_t euclidDistSquare(int32_t x0, int32_t y0, int32_t x1, int32_t y1);
190
191    // Find the closest dimensions for a given format in available stream configurations with
192    // a width <= ROUNDING_WIDTH_CAP
193    static const int32_t ROUNDING_WIDTH_CAP = 1920;
194    static bool roundBufferDimensionNearest(int32_t width, int32_t height, int32_t format,
195            android_dataspace dataSpace, const CameraMetadata& info,
196            /*out*/int32_t* outWidth, /*out*/int32_t* outHeight);
197
198    // IGraphicsBufferProducer binder -> Stream ID for output streams
199    KeyedVector<sp<IBinder>, int> mStreamMap;
200
201    struct InputStreamConfiguration {
202        bool configured;
203        int32_t width;
204        int32_t height;
205        int32_t format;
206        int32_t id;
207    } mInputStream;
208
209    // Streaming request ID
210    int32_t mStreamingRequestId;
211    static const int32_t REQUEST_ID_NONE = -1;
212
213    int32_t mRequestIdCounter;
214
215};
216
217}; // namespace android
218
219#endif
220