1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * Copyright (C) 2008 HTC Inc. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18 #ifndef ANDROID_HARDWARE_CAMERA_H 19 #define ANDROID_HARDWARE_CAMERA_H 20 21 #include <utils/Timers.h> 22 #include <camera/ICameraClient.h> 23 24 namespace android { 25 26 class ISurface; 27 28 /* 29 * A set of bit masks for specifying how the received preview frames are 30 * handled before the previewCallback() call. 31 * 32 * The least significant 3 bits of an "int" value are used for this purpose: 33 * 34 * ..... 0 0 0 35 * ^ ^ ^ 36 * | | |---------> determine whether the callback is enabled or not 37 * | |-----------> determine whether the callback is one-shot or not 38 * |-------------> determine whether the frame is copied out or not 39 * 40 * WARNING: 41 * When a frame is sent directly without copying, it is the frame receiver's 42 * responsiblity to make sure that the frame data won't get corrupted by 43 * subsequent preview frames filled by the camera. This flag is recommended 44 * only when copying out data brings significant performance price and the 45 * handling/processing of the received frame data is always faster than 46 * the preview frame rate so that data corruption won't occur. 47 * 48 * For instance, 49 * 1. 0x00 disables the callback. In this case, copy out and one shot bits 50 * are ignored. 51 * 2. 0x01 enables a callback without copying out the received frames. A 52 * typical use case is the Camcorder application to avoid making costly 53 * frame copies. 54 * 3. 0x05 is enabling a callback with frame copied out repeatedly. A typical 55 * use case is the Camera application. 56 * 4. 0x07 is enabling a callback with frame copied out only once. A typical use 57 * case is the Barcode scanner application. 58 */ 59 #define FRAME_CALLBACK_FLAG_ENABLE_MASK 0x01 60 #define FRAME_CALLBACK_FLAG_ONE_SHOT_MASK 0x02 61 #define FRAME_CALLBACK_FLAG_COPY_OUT_MASK 0x04 62 63 // Typical use cases 64 #define FRAME_CALLBACK_FLAG_NOOP 0x00 65 #define FRAME_CALLBACK_FLAG_CAMCORDER 0x01 66 #define FRAME_CALLBACK_FLAG_CAMERA 0x05 67 #define FRAME_CALLBACK_FLAG_BARCODE_SCANNER 0x07 68 69 // msgType in notifyCallback and dataCallback functions 70 enum { 71 CAMERA_MSG_ERROR = 0x001, 72 CAMERA_MSG_SHUTTER = 0x002, 73 CAMERA_MSG_FOCUS = 0x004, 74 CAMERA_MSG_ZOOM = 0x008, 75 CAMERA_MSG_PREVIEW_FRAME = 0x010, 76 CAMERA_MSG_VIDEO_FRAME = 0x020, 77 CAMERA_MSG_POSTVIEW_FRAME = 0x040, 78 CAMERA_MSG_RAW_IMAGE = 0x080, 79 CAMERA_MSG_COMPRESSED_IMAGE = 0x100, 80 CAMERA_MSG_ALL_MSGS = 0x1FF 81 }; 82 83 // cmdType in sendCommand functions 84 enum { 85 CAMERA_CMD_START_SMOOTH_ZOOM = 1, 86 CAMERA_CMD_STOP_SMOOTH_ZOOM = 2, 87 CAMERA_CMD_SET_DISPLAY_ORIENTATION = 3, 88 }; 89 90 // camera fatal errors 91 enum { 92 CAMERA_ERROR_UKNOWN = 1, 93 CAMERA_ERROR_SERVER_DIED = 100 94 }; 95 96 class ICameraService; 97 class ICamera; 98 class Surface; 99 class Mutex; 100 class String8; 101 102 // ref-counted object for callbacks 103 class CameraListener: virtual public RefBase 104 { 105 public: 106 virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2) = 0; 107 virtual void postData(int32_t msgType, const sp<IMemory>& dataPtr) = 0; 108 virtual void postDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) = 0; 109 }; 110 111 class Camera : public BnCameraClient, public IBinder::DeathRecipient 112 { 113 public: 114 // construct a camera client from an existing remote 115 static sp<Camera> create(const sp<ICamera>& camera); 116 static sp<Camera> connect(); 117 ~Camera(); 118 void init(); 119 120 status_t reconnect(); 121 void disconnect(); 122 status_t lock(); 123 status_t unlock(); 124 125 status_t getStatus() { return mStatus; } 126 127 // pass the buffered ISurface to the camera service 128 status_t setPreviewDisplay(const sp<Surface>& surface); 129 status_t setPreviewDisplay(const sp<ISurface>& surface); 130 131 // start preview mode, must call setPreviewDisplay first 132 status_t startPreview(); 133 134 // stop preview mode 135 void stopPreview(); 136 137 // get preview state 138 bool previewEnabled(); 139 140 // start recording mode, must call setPreviewDisplay first 141 status_t startRecording(); 142 143 // stop recording mode 144 void stopRecording(); 145 146 // get recording state 147 bool recordingEnabled(); 148 149 // release a recording frame 150 void releaseRecordingFrame(const sp<IMemory>& mem); 151 152 // autoFocus - status returned from callback 153 status_t autoFocus(); 154 155 // cancel auto focus 156 status_t cancelAutoFocus(); 157 158 // take a picture - picture returned from callback 159 status_t takePicture(); 160 161 // set preview/capture parameters - key/value pairs 162 status_t setParameters(const String8& params); 163 164 // get preview/capture parameters - key/value pairs 165 String8 getParameters() const; 166 167 // send command to camera driver 168 status_t sendCommand(int32_t cmd, int32_t arg1, int32_t arg2); 169 170 void setListener(const sp<CameraListener>& listener); 171 void setPreviewCallbackFlags(int preview_callback_flag); 172 173 // ICameraClient interface 174 virtual void notifyCallback(int32_t msgType, int32_t ext, int32_t ext2); 175 virtual void dataCallback(int32_t msgType, const sp<IMemory>& dataPtr); 176 virtual void dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr); 177 178 sp<ICamera> remote(); 179 180 private: 181 Camera(); 182 Camera(const Camera&); 183 Camera& operator=(const Camera); 184 virtual void binderDied(const wp<IBinder>& who); 185 186 class DeathNotifier: public IBinder::DeathRecipient 187 { 188 public: 189 DeathNotifier() { 190 } 191 192 virtual void binderDied(const wp<IBinder>& who); 193 }; 194 195 static sp<DeathNotifier> mDeathNotifier; 196 197 // helper function to obtain camera service handle 198 static const sp<ICameraService>& getCameraService(); 199 200 sp<ICamera> mCamera; 201 status_t mStatus; 202 203 sp<CameraListener> mListener; 204 205 friend class DeathNotifier; 206 207 static Mutex mLock; 208 static sp<ICameraService> mCameraService; 209 210 }; 211 212 }; // namespace android 213 214 #endif 215
