1/*
2 * Copyright (C) 2008 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_HARDWARE_ICAMERASERVICE_H
18#define ANDROID_HARDWARE_ICAMERASERVICE_H
19
20#include <utils/RefBase.h>
21#include <binder/IInterface.h>
22#include <binder/Parcel.h>
23
24namespace android {
25
26class ICamera;
27class ICameraClient;
28class ICameraServiceListener;
29class ICameraDeviceUser;
30class ICameraDeviceCallbacks;
31class CameraMetadata;
32class VendorTagDescriptor;
33class String16;
34
35class ICameraService : public IInterface
36{
37public:
38    /**
39     * Keep up-to-date with ICameraService.aidl in frameworks/base
40     */
41    enum {
42        GET_NUMBER_OF_CAMERAS = IBinder::FIRST_CALL_TRANSACTION,
43        GET_CAMERA_INFO,
44        CONNECT,
45        CONNECT_DEVICE,
46        ADD_LISTENER,
47        REMOVE_LISTENER,
48        GET_CAMERA_CHARACTERISTICS,
49        GET_CAMERA_VENDOR_TAG_DESCRIPTOR,
50        GET_LEGACY_PARAMETERS,
51        SUPPORTS_CAMERA_API,
52        CONNECT_LEGACY,
53        SET_TORCH_MODE,
54        NOTIFY_SYSTEM_EVENT,
55    };
56
57    enum {
58        USE_CALLING_UID = -1
59    };
60
61    enum {
62        API_VERSION_1 = 1,
63        API_VERSION_2 = 2,
64    };
65
66    enum {
67        CAMERA_TYPE_BACKWARD_COMPATIBLE = 0,
68        CAMERA_TYPE_ALL = 1,
69    };
70
71    enum {
72        CAMERA_HAL_API_VERSION_UNSPECIFIED = -1
73    };
74
75    /**
76     * Keep up-to-date with declarations in
77     * frameworks/base/services/core/java/com/android/server/camera/CameraService.java
78     *
79     * These event codes are intended to be used with the notifySystemEvent call.
80     */
81    enum {
82        NO_EVENT = 0,
83        USER_SWITCHED,
84    };
85
86public:
87    DECLARE_META_INTERFACE(CameraService);
88
89    // Get the number of cameras that support basic color camera operation
90    // (type CAMERA_TYPE_BACKWARD_COMPATIBLE)
91    virtual int32_t  getNumberOfCameras() = 0;
92    // Get the number of cameras of the specified type, one of CAMERA_TYPE_*
93    // enums
94    virtual int32_t  getNumberOfCameras(int cameraType) = 0;
95    virtual status_t getCameraInfo(int cameraId,
96            /*out*/
97            struct CameraInfo* cameraInfo) = 0;
98
99    virtual status_t getCameraCharacteristics(int cameraId,
100            /*out*/
101            CameraMetadata* cameraInfo) = 0;
102
103    virtual status_t getCameraVendorTagDescriptor(
104            /*out*/
105            sp<VendorTagDescriptor>& desc) = 0;
106
107    // Returns 'OK' if operation succeeded
108    // - Errors: ALREADY_EXISTS if the listener was already added
109    virtual status_t addListener(const sp<ICameraServiceListener>& listener)
110                                                                            = 0;
111    // Returns 'OK' if operation succeeded
112    // - Errors: BAD_VALUE if specified listener was not in the listener list
113    virtual status_t removeListener(const sp<ICameraServiceListener>& listener)
114                                                                            = 0;
115    /**
116     * clientPackageName and clientUid are used for permissions checking.  if
117     * clientUid == USE_CALLING_UID, then the calling UID is used instead. Only
118     * trusted callers can set a clientUid other than USE_CALLING_UID.
119     */
120    virtual status_t connect(const sp<ICameraClient>& cameraClient,
121            int cameraId,
122            const String16& clientPackageName,
123            int clientUid,
124            /*out*/
125            sp<ICamera>& device) = 0;
126
127    virtual status_t connectDevice(
128            const sp<ICameraDeviceCallbacks>& cameraCb,
129            int cameraId,
130            const String16& clientPackageName,
131            int clientUid,
132            /*out*/
133            sp<ICameraDeviceUser>& device) = 0;
134
135    virtual status_t getLegacyParameters(
136            int cameraId,
137            /*out*/
138            String16* parameters) = 0;
139
140    /**
141     * Returns OK if device supports camera2 api,
142     * returns -EOPNOTSUPP if it doesn't.
143     */
144    virtual status_t supportsCameraApi(
145            int cameraId, int apiVersion) = 0;
146
147    /**
148     * Connect the device as a legacy device for a given HAL version.
149     * For halVersion, use CAMERA_API_DEVICE_VERSION_* for a particular
150     * version, or CAMERA_HAL_API_VERSION_UNSPECIFIED for a service-selected version.
151     */
152    virtual status_t connectLegacy(const sp<ICameraClient>& cameraClient,
153            int cameraId, int halVersion,
154            const String16& clientPackageName,
155            int clientUid,
156            /*out*/
157            sp<ICamera>& device) = 0;
158
159    /**
160     * Turn on or off a camera's torch mode. Torch mode will be turned off by
161     * camera service if the lastest client binder that turns it on dies.
162     *
163     * return values:
164     * 0:       on a successful operation.
165     * -ENOSYS: the camera device doesn't support this operation. It it returned
166     *          if and only if android.flash.into.available is false.
167     * -EBUSY:  the camera device is opened.
168     * -EINVAL: camera_id is invalid or clientBinder is NULL when enabling a
169     *          torch mode.
170     */
171    virtual status_t setTorchMode(const String16& cameraId, bool enabled,
172            const sp<IBinder>& clientBinder) = 0;
173
174    /**
175     * Notify the camera service of a system event.  Should only be called from system_server.
176     */
177    virtual void notifySystemEvent(int32_t eventId, const int32_t* args, size_t length) = 0;
178};
179
180// ----------------------------------------------------------------------------
181
182class BnCameraService: public BnInterface<ICameraService>
183{
184public:
185    virtual status_t    onTransact( uint32_t code,
186                                    const Parcel& data,
187                                    Parcel* reply,
188                                    uint32_t flags = 0);
189};
190
191}; // namespace android
192
193#endif
194