Camera.cpp revision 5ff1dd576bb93c45b44088a51544a18fc43ebf58
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#include <binder/IPCThreadState.h> 23#include <binder/IServiceManager.h> 24#include <binder/IMemory.h> 25 26#include <camera/Camera.h> 27#include <camera/ICameraRecordingProxyListener.h> 28#include <camera/ICameraService.h> 29 30#include <surfaceflinger/Surface.h> 31 32namespace android { 33 34// client singleton for camera service binder interface 35Mutex Camera::mLock; 36sp<ICameraService> Camera::mCameraService; 37sp<Camera::DeathNotifier> Camera::mDeathNotifier; 38 39// establish binder interface to camera service 40const sp<ICameraService>& Camera::getCameraService() 41{ 42 Mutex::Autolock _l(mLock); 43 if (mCameraService.get() == 0) { 44 sp<IServiceManager> sm = defaultServiceManager(); 45 sp<IBinder> binder; 46 do { 47 binder = sm->getService(String16("media.camera")); 48 if (binder != 0) 49 break; 50 ALOGW("CameraService not published, waiting..."); 51 usleep(500000); // 0.5 s 52 } while(true); 53 if (mDeathNotifier == NULL) { 54 mDeathNotifier = new DeathNotifier(); 55 } 56 binder->linkToDeath(mDeathNotifier); 57 mCameraService = interface_cast<ICameraService>(binder); 58 } 59 LOGE_IF(mCameraService==0, "no CameraService!?"); 60 return mCameraService; 61} 62 63// --------------------------------------------------------------------------- 64 65Camera::Camera() 66{ 67 init(); 68} 69 70// construct a camera client from an existing camera remote 71sp<Camera> Camera::create(const sp<ICamera>& camera) 72{ 73 ALOGV("create"); 74 if (camera == 0) { 75 LOGE("camera remote is a NULL pointer"); 76 return 0; 77 } 78 79 sp<Camera> c = new Camera(); 80 if (camera->connect(c) == NO_ERROR) { 81 c->mStatus = NO_ERROR; 82 c->mCamera = camera; 83 camera->asBinder()->linkToDeath(c); 84 return c; 85 } 86 return 0; 87} 88 89void Camera::init() 90{ 91 mStatus = UNKNOWN_ERROR; 92} 93 94Camera::~Camera() 95{ 96 // We don't need to call disconnect() here because if the CameraService 97 // thinks we are the owner of the hardware, it will hold a (strong) 98 // reference to us, and we can't possibly be here. We also don't want to 99 // call disconnect() here if we are in the same process as mediaserver, 100 // because we may be invoked by CameraService::Client::connect() and will 101 // deadlock if we call any method of ICamera here. 102} 103 104int32_t Camera::getNumberOfCameras() 105{ 106 const sp<ICameraService>& cs = getCameraService(); 107 if (cs == 0) return 0; 108 return cs->getNumberOfCameras(); 109} 110 111status_t Camera::getCameraInfo(int cameraId, 112 struct CameraInfo* cameraInfo) { 113 const sp<ICameraService>& cs = getCameraService(); 114 if (cs == 0) return UNKNOWN_ERROR; 115 return cs->getCameraInfo(cameraId, cameraInfo); 116} 117 118sp<Camera> Camera::connect(int cameraId) 119{ 120 ALOGV("connect"); 121 sp<Camera> c = new Camera(); 122 const sp<ICameraService>& cs = getCameraService(); 123 if (cs != 0) { 124 c->mCamera = cs->connect(c, cameraId); 125 } 126 if (c->mCamera != 0) { 127 c->mCamera->asBinder()->linkToDeath(c); 128 c->mStatus = NO_ERROR; 129 } else { 130 c.clear(); 131 } 132 return c; 133} 134 135void Camera::disconnect() 136{ 137 ALOGV("disconnect"); 138 if (mCamera != 0) { 139 mCamera->disconnect(); 140 mCamera->asBinder()->unlinkToDeath(this); 141 mCamera = 0; 142 } 143} 144 145status_t Camera::reconnect() 146{ 147 ALOGV("reconnect"); 148 sp <ICamera> c = mCamera; 149 if (c == 0) return NO_INIT; 150 return c->connect(this); 151} 152 153sp<ICamera> Camera::remote() 154{ 155 return mCamera; 156} 157 158status_t Camera::lock() 159{ 160 sp <ICamera> c = mCamera; 161 if (c == 0) return NO_INIT; 162 return c->lock(); 163} 164 165status_t Camera::unlock() 166{ 167 sp <ICamera> c = mCamera; 168 if (c == 0) return NO_INIT; 169 return c->unlock(); 170} 171 172// pass the buffered Surface to the camera service 173status_t Camera::setPreviewDisplay(const sp<Surface>& surface) 174{ 175 ALOGV("setPreviewDisplay(%p)", surface.get()); 176 sp <ICamera> c = mCamera; 177 if (c == 0) return NO_INIT; 178 if (surface != 0) { 179 return c->setPreviewDisplay(surface); 180 } else { 181 ALOGD("app passed NULL surface"); 182 return c->setPreviewDisplay(0); 183 } 184} 185 186// pass the buffered ISurfaceTexture to the camera service 187status_t Camera::setPreviewTexture(const sp<ISurfaceTexture>& surfaceTexture) 188{ 189 ALOGV("setPreviewTexture(%p)", surfaceTexture.get()); 190 sp <ICamera> c = mCamera; 191 if (c == 0) return NO_INIT; 192 if (surfaceTexture != 0) { 193 return c->setPreviewTexture(surfaceTexture); 194 } else { 195 ALOGD("app passed NULL surface"); 196 return c->setPreviewTexture(0); 197 } 198} 199 200// start preview mode 201status_t Camera::startPreview() 202{ 203 ALOGV("startPreview"); 204 sp <ICamera> c = mCamera; 205 if (c == 0) return NO_INIT; 206 return c->startPreview(); 207} 208 209status_t Camera::storeMetaDataInBuffers(bool enabled) 210{ 211 ALOGV("storeMetaDataInBuffers: %s", 212 enabled? "true": "false"); 213 sp <ICamera> c = mCamera; 214 if (c == 0) return NO_INIT; 215 return c->storeMetaDataInBuffers(enabled); 216} 217 218// start recording mode, must call setPreviewDisplay first 219status_t Camera::startRecording() 220{ 221 ALOGV("startRecording"); 222 sp <ICamera> c = mCamera; 223 if (c == 0) return NO_INIT; 224 return c->startRecording(); 225} 226 227// stop preview mode 228void Camera::stopPreview() 229{ 230 ALOGV("stopPreview"); 231 sp <ICamera> c = mCamera; 232 if (c == 0) return; 233 c->stopPreview(); 234} 235 236// stop recording mode 237void Camera::stopRecording() 238{ 239 ALOGV("stopRecording"); 240 { 241 Mutex::Autolock _l(mLock); 242 mRecordingProxyListener.clear(); 243 } 244 sp <ICamera> c = mCamera; 245 if (c == 0) return; 246 c->stopRecording(); 247} 248 249// release a recording frame 250void Camera::releaseRecordingFrame(const sp<IMemory>& mem) 251{ 252 ALOGV("releaseRecordingFrame"); 253 sp <ICamera> c = mCamera; 254 if (c == 0) return; 255 c->releaseRecordingFrame(mem); 256} 257 258// get preview state 259bool Camera::previewEnabled() 260{ 261 ALOGV("previewEnabled"); 262 sp <ICamera> c = mCamera; 263 if (c == 0) return false; 264 return c->previewEnabled(); 265} 266 267// get recording state 268bool Camera::recordingEnabled() 269{ 270 ALOGV("recordingEnabled"); 271 sp <ICamera> c = mCamera; 272 if (c == 0) return false; 273 return c->recordingEnabled(); 274} 275 276status_t Camera::autoFocus() 277{ 278 ALOGV("autoFocus"); 279 sp <ICamera> c = mCamera; 280 if (c == 0) return NO_INIT; 281 return c->autoFocus(); 282} 283 284status_t Camera::cancelAutoFocus() 285{ 286 ALOGV("cancelAutoFocus"); 287 sp <ICamera> c = mCamera; 288 if (c == 0) return NO_INIT; 289 return c->cancelAutoFocus(); 290} 291 292// take a picture 293status_t Camera::takePicture(int msgType) 294{ 295 ALOGV("takePicture: 0x%x", msgType); 296 sp <ICamera> c = mCamera; 297 if (c == 0) return NO_INIT; 298 return c->takePicture(msgType); 299} 300 301// set preview/capture parameters - key/value pairs 302status_t Camera::setParameters(const String8& params) 303{ 304 ALOGV("setParameters"); 305 sp <ICamera> c = mCamera; 306 if (c == 0) return NO_INIT; 307 return c->setParameters(params); 308} 309 310// get preview/capture parameters - key/value pairs 311String8 Camera::getParameters() const 312{ 313 ALOGV("getParameters"); 314 String8 params; 315 sp <ICamera> c = mCamera; 316 if (c != 0) params = mCamera->getParameters(); 317 return params; 318} 319 320// send command to camera driver 321status_t Camera::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) 322{ 323 ALOGV("sendCommand"); 324 sp <ICamera> c = mCamera; 325 if (c == 0) return NO_INIT; 326 return c->sendCommand(cmd, arg1, arg2); 327} 328 329void Camera::setListener(const sp<CameraListener>& listener) 330{ 331 Mutex::Autolock _l(mLock); 332 mListener = listener; 333} 334 335void Camera::setRecordingProxyListener(const sp<ICameraRecordingProxyListener>& listener) 336{ 337 Mutex::Autolock _l(mLock); 338 mRecordingProxyListener = listener; 339} 340 341void Camera::setPreviewCallbackFlags(int flag) 342{ 343 ALOGV("setPreviewCallbackFlags"); 344 sp <ICamera> c = mCamera; 345 if (c == 0) return; 346 mCamera->setPreviewCallbackFlag(flag); 347} 348 349// callback from camera service 350void Camera::notifyCallback(int32_t msgType, int32_t ext1, int32_t ext2) 351{ 352 sp<CameraListener> listener; 353 { 354 Mutex::Autolock _l(mLock); 355 listener = mListener; 356 } 357 if (listener != NULL) { 358 listener->notify(msgType, ext1, ext2); 359 } 360} 361 362// callback from camera service when frame or image is ready 363void Camera::dataCallback(int32_t msgType, const sp<IMemory>& dataPtr, 364 camera_frame_metadata_t *metadata) 365{ 366 sp<CameraListener> listener; 367 { 368 Mutex::Autolock _l(mLock); 369 listener = mListener; 370 } 371 if (listener != NULL) { 372 listener->postData(msgType, dataPtr, metadata); 373 } 374} 375 376// callback from camera service when timestamped frame is ready 377void Camera::dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) 378{ 379 // If recording proxy listener is registered, forward the frame and return. 380 // The other listener (mListener) is ignored because the receiver needs to 381 // call releaseRecordingFrame. 382 sp<ICameraRecordingProxyListener> proxylistener; 383 { 384 Mutex::Autolock _l(mLock); 385 proxylistener = mRecordingProxyListener; 386 } 387 if (proxylistener != NULL) { 388 proxylistener->dataCallbackTimestamp(timestamp, msgType, dataPtr); 389 return; 390 } 391 392 sp<CameraListener> listener; 393 { 394 Mutex::Autolock _l(mLock); 395 listener = mListener; 396 } 397 if (listener != NULL) { 398 listener->postDataTimestamp(timestamp, msgType, dataPtr); 399 } else { 400 ALOGW("No listener was set. Drop a recording frame."); 401 releaseRecordingFrame(dataPtr); 402 } 403} 404 405void Camera::binderDied(const wp<IBinder>& who) { 406 ALOGW("ICamera died"); 407 notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_SERVER_DIED, 0); 408} 409 410void Camera::DeathNotifier::binderDied(const wp<IBinder>& who) { 411 ALOGV("binderDied"); 412 Mutex::Autolock _l(Camera::mLock); 413 Camera::mCameraService.clear(); 414 ALOGW("Camera server died!"); 415} 416 417sp<ICameraRecordingProxy> Camera::getRecordingProxy() { 418 ALOGV("getProxy"); 419 return new RecordingProxy(this); 420} 421 422status_t Camera::RecordingProxy::startRecording(const sp<ICameraRecordingProxyListener>& listener) 423{ 424 ALOGV("RecordingProxy::startRecording"); 425 mCamera->setRecordingProxyListener(listener); 426 mCamera->reconnect(); 427 return mCamera->startRecording(); 428} 429 430void Camera::RecordingProxy::stopRecording() 431{ 432 ALOGV("RecordingProxy::stopRecording"); 433 mCamera->stopRecording(); 434} 435 436void Camera::RecordingProxy::releaseRecordingFrame(const sp<IMemory>& mem) 437{ 438 ALOGV("RecordingProxy::releaseRecordingFrame"); 439 mCamera->releaseRecordingFrame(mem); 440} 441 442Camera::RecordingProxy::RecordingProxy(const sp<Camera>& camera) 443{ 444 mCamera = camera; 445} 446 447}; // namespace android 448