Camera.cpp revision 01cff464978aa0f749f42650180b45ea56cb17de
1/* 2** 3** Copyright (C) 2008, The Android Open Source Project 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//#define LOG_NDEBUG 0 19#define LOG_TAG "Camera" 20#include <utils/Log.h> 21#include <utils/threads.h> 22 23#include <binder/IServiceManager.h> 24#include <binder/IMemory.h> 25 26#include <camera/Camera.h> 27#include <camera/ICameraService.h> 28 29#include <surfaceflinger/Surface.h> 30 31namespace android { 32 33// client singleton for camera service binder interface 34Mutex Camera::mLock; 35sp<ICameraService> Camera::mCameraService; 36sp<Camera::DeathNotifier> Camera::mDeathNotifier; 37 38// establish binder interface to camera service 39const sp<ICameraService>& Camera::getCameraService() 40{ 41 Mutex::Autolock _l(mLock); 42 if (mCameraService.get() == 0) { 43 sp<IServiceManager> sm = defaultServiceManager(); 44 sp<IBinder> binder; 45 do { 46 binder = sm->getService(String16("media.camera")); 47 if (binder != 0) 48 break; 49 LOGW("CameraService not published, waiting..."); 50 usleep(500000); // 0.5 s 51 } while(true); 52 if (mDeathNotifier == NULL) { 53 mDeathNotifier = new DeathNotifier(); 54 } 55 binder->linkToDeath(mDeathNotifier); 56 mCameraService = interface_cast<ICameraService>(binder); 57 } 58 LOGE_IF(mCameraService==0, "no CameraService!?"); 59 return mCameraService; 60} 61 62// --------------------------------------------------------------------------- 63 64Camera::Camera() 65{ 66 init(); 67} 68 69// construct a camera client from an existing camera remote 70sp<Camera> Camera::create(const sp<ICamera>& camera) 71{ 72 LOGV("create"); 73 if (camera == 0) { 74 LOGE("camera remote is a NULL pointer"); 75 return 0; 76 } 77 78 sp<Camera> c = new Camera(); 79 if (camera->connect(c) == NO_ERROR) { 80 c->mStatus = NO_ERROR; 81 c->mCamera = camera; 82 camera->asBinder()->linkToDeath(c); 83 } 84 return c; 85} 86 87void Camera::init() 88{ 89 mStatus = UNKNOWN_ERROR; 90} 91 92Camera::~Camera() 93{ 94 disconnect(); 95} 96 97sp<Camera> Camera::connect() 98{ 99 LOGV("connect"); 100 sp<Camera> c = new Camera(); 101 const sp<ICameraService>& cs = getCameraService(); 102 if (cs != 0) { 103 c->mCamera = cs->connect(c); 104 } 105 if (c->mCamera != 0) { 106 c->mCamera->asBinder()->linkToDeath(c); 107 c->mStatus = NO_ERROR; 108 } else { 109 c.clear(); 110 } 111 return c; 112} 113 114void Camera::disconnect() 115{ 116 LOGV("disconnect"); 117 if (mCamera != 0) { 118 mCamera->disconnect(); 119 mCamera->asBinder()->unlinkToDeath(this); 120 mCamera = 0; 121 } 122} 123 124status_t Camera::reconnect() 125{ 126 LOGV("reconnect"); 127 sp <ICamera> c = mCamera; 128 if (c == 0) return NO_INIT; 129 return c->connect(this); 130} 131 132sp<ICamera> Camera::remote() 133{ 134 return mCamera; 135} 136 137status_t Camera::lock() 138{ 139 sp <ICamera> c = mCamera; 140 if (c == 0) return NO_INIT; 141 return c->lock(); 142} 143 144status_t Camera::unlock() 145{ 146 sp <ICamera> c = mCamera; 147 if (c == 0) return NO_INIT; 148 return c->unlock(); 149} 150 151// pass the buffered ISurface to the camera service 152status_t Camera::setPreviewDisplay(const sp<Surface>& surface) 153{ 154 LOGV("setPreviewDisplay"); 155 sp <ICamera> c = mCamera; 156 if (c == 0) return NO_INIT; 157 if (surface != 0) { 158 return c->setPreviewDisplay(surface->getISurface()); 159 } else { 160 LOGD("app passed NULL surface"); 161 return c->setPreviewDisplay(0); 162 } 163} 164 165status_t Camera::setPreviewDisplay(const sp<ISurface>& surface) 166{ 167 LOGV("setPreviewDisplay"); 168 if (surface == 0) { 169 LOGD("app passed NULL surface"); 170 } 171 sp <ICamera> c = mCamera; 172 if (c == 0) return NO_INIT; 173 return c->setPreviewDisplay(surface); 174} 175 176 177// start preview mode 178status_t Camera::startPreview() 179{ 180 LOGV("startPreview"); 181 sp <ICamera> c = mCamera; 182 if (c == 0) return NO_INIT; 183 return c->startPreview(); 184} 185 186// start recording mode, must call setPreviewDisplay first 187status_t Camera::startRecording() 188{ 189 LOGV("startRecording"); 190 sp <ICamera> c = mCamera; 191 if (c == 0) return NO_INIT; 192 return c->startRecording(); 193} 194 195// stop preview mode 196void Camera::stopPreview() 197{ 198 LOGV("stopPreview"); 199 sp <ICamera> c = mCamera; 200 if (c == 0) return; 201 c->stopPreview(); 202} 203 204// stop recording mode 205void Camera::stopRecording() 206{ 207 LOGV("stopRecording"); 208 sp <ICamera> c = mCamera; 209 if (c == 0) return; 210 c->stopRecording(); 211} 212 213// release a recording frame 214void Camera::releaseRecordingFrame(const sp<IMemory>& mem) 215{ 216 LOGV("releaseRecordingFrame"); 217 sp <ICamera> c = mCamera; 218 if (c == 0) return; 219 c->releaseRecordingFrame(mem); 220} 221 222// get preview state 223bool Camera::previewEnabled() 224{ 225 LOGV("previewEnabled"); 226 sp <ICamera> c = mCamera; 227 if (c == 0) return false; 228 return c->previewEnabled(); 229} 230 231// get recording state 232bool Camera::recordingEnabled() 233{ 234 LOGV("recordingEnabled"); 235 sp <ICamera> c = mCamera; 236 if (c == 0) return false; 237 return c->recordingEnabled(); 238} 239 240status_t Camera::autoFocus() 241{ 242 LOGV("autoFocus"); 243 sp <ICamera> c = mCamera; 244 if (c == 0) return NO_INIT; 245 return c->autoFocus(); 246} 247 248status_t Camera::cancelAutoFocus() 249{ 250 LOGV("cancelAutoFocus"); 251 sp <ICamera> c = mCamera; 252 if (c == 0) return NO_INIT; 253 return c->cancelAutoFocus(); 254} 255 256// take a picture 257status_t Camera::takePicture() 258{ 259 LOGV("takePicture"); 260 sp <ICamera> c = mCamera; 261 if (c == 0) return NO_INIT; 262 return c->takePicture(); 263} 264 265// set preview/capture parameters - key/value pairs 266status_t Camera::setParameters(const String8& params) 267{ 268 LOGV("setParameters"); 269 sp <ICamera> c = mCamera; 270 if (c == 0) return NO_INIT; 271 return c->setParameters(params); 272} 273 274// get preview/capture parameters - key/value pairs 275String8 Camera::getParameters() const 276{ 277 LOGV("getParameters"); 278 String8 params; 279 sp <ICamera> c = mCamera; 280 if (c != 0) params = mCamera->getParameters(); 281 return params; 282} 283 284// send command to camera driver 285status_t Camera::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) 286{ 287 LOGV("sendCommand"); 288 sp <ICamera> c = mCamera; 289 if (c == 0) return NO_INIT; 290 return c->sendCommand(cmd, arg1, arg2); 291} 292 293void Camera::setListener(const sp<CameraListener>& listener) 294{ 295 Mutex::Autolock _l(mLock); 296 mListener = listener; 297} 298 299void Camera::setPreviewCallbackFlags(int flag) 300{ 301 LOGV("setPreviewCallbackFlags"); 302 sp <ICamera> c = mCamera; 303 if (c == 0) return; 304 mCamera->setPreviewCallbackFlag(flag); 305} 306 307// callback from camera service 308void Camera::notifyCallback(int32_t msgType, int32_t ext1, int32_t ext2) 309{ 310 sp<CameraListener> listener; 311 { 312 Mutex::Autolock _l(mLock); 313 listener = mListener; 314 } 315 if (listener != NULL) { 316 listener->notify(msgType, ext1, ext2); 317 } 318} 319 320// callback from camera service when frame or image is ready 321void Camera::dataCallback(int32_t msgType, const sp<IMemory>& dataPtr) 322{ 323 sp<CameraListener> listener; 324 { 325 Mutex::Autolock _l(mLock); 326 listener = mListener; 327 } 328 if (listener != NULL) { 329 listener->postData(msgType, dataPtr); 330 } 331} 332 333// callback from camera service when timestamped frame is ready 334void Camera::dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) 335{ 336 sp<CameraListener> listener; 337 { 338 Mutex::Autolock _l(mLock); 339 listener = mListener; 340 } 341 if (listener != NULL) { 342 listener->postDataTimestamp(timestamp, msgType, dataPtr); 343 } 344} 345 346void Camera::binderDied(const wp<IBinder>& who) { 347 LOGW("ICamera died"); 348 notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_SERVER_DIED, 0); 349} 350 351void Camera::DeathNotifier::binderDied(const wp<IBinder>& who) { 352 LOGV("binderDied"); 353 Mutex::Autolock _l(Camera::mLock); 354 Camera::mCameraService.clear(); 355 LOGW("Camera server died!"); 356} 357 358}; // namespace android 359 360