Camera.cpp revision f8ed70a20f8b006539af98c8ad45be9561665f82
1/* 2** 3** Copyright (C) 2008, The Android Open Source Project 4** Copyright (C) 2008 HTC Inc. 5** 6** Licensed under the Apache License, Version 2.0 (the "License"); 7** you may not use this file except in compliance with the License. 8** You may obtain a copy of the License at 9** 10** http://www.apache.org/licenses/LICENSE-2.0 11** 12** Unless required by applicable law or agreed to in writing, software 13** distributed under the License is distributed on an "AS IS" BASIS, 14** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15** See the License for the specific language governing permissions and 16** limitations under the License. 17*/ 18 19//#define LOG_NDEBUG 0 20#define LOG_TAG "Camera" 21#include <utils/Log.h> 22#include <utils/threads.h> 23 24#include <binder/IServiceManager.h> 25#include <binder/IMemory.h> 26 27#include <camera/Camera.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 LOGW("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 LOGV("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 } 85 return c; 86} 87 88void Camera::init() 89{ 90 mStatus = UNKNOWN_ERROR; 91} 92 93Camera::~Camera() 94{ 95 disconnect(); 96} 97 98sp<Camera> Camera::connect() 99{ 100 LOGV("connect"); 101 sp<Camera> c = new Camera(); 102 const sp<ICameraService>& cs = getCameraService(); 103 if (cs != 0) { 104 c->mCamera = cs->connect(c); 105 } 106 if (c->mCamera != 0) { 107 c->mCamera->asBinder()->linkToDeath(c); 108 c->mStatus = NO_ERROR; 109 } else { 110 c.clear(); 111 } 112 return c; 113} 114 115void Camera::disconnect() 116{ 117 LOGV("disconnect"); 118 if (mCamera != 0) { 119 mCamera->disconnect(); 120 mCamera->asBinder()->unlinkToDeath(this); 121 mCamera = 0; 122 } 123} 124 125status_t Camera::reconnect() 126{ 127 LOGV("reconnect"); 128 sp <ICamera> c = mCamera; 129 if (c == 0) return NO_INIT; 130 return c->connect(this); 131} 132 133sp<ICamera> Camera::remote() 134{ 135 return mCamera; 136} 137 138status_t Camera::lock() 139{ 140 sp <ICamera> c = mCamera; 141 if (c == 0) return NO_INIT; 142 return c->lock(); 143} 144 145status_t Camera::unlock() 146{ 147 sp <ICamera> c = mCamera; 148 if (c == 0) return NO_INIT; 149 return c->unlock(); 150} 151 152// pass the buffered ISurface to the camera service 153status_t Camera::setPreviewDisplay(const sp<Surface>& surface) 154{ 155 LOGV("setPreviewDisplay"); 156 sp <ICamera> c = mCamera; 157 if (c == 0) return NO_INIT; 158 if (surface != 0) { 159 return c->setPreviewDisplay(surface->getISurface()); 160 } else { 161 LOGD("app passed NULL surface"); 162 return c->setPreviewDisplay(0); 163 } 164} 165 166status_t Camera::setPreviewDisplay(const sp<ISurface>& surface) 167{ 168 LOGV("setPreviewDisplay"); 169 if (surface == 0) { 170 LOGD("app passed NULL surface"); 171 } 172 sp <ICamera> c = mCamera; 173 if (c == 0) return NO_INIT; 174 return c->setPreviewDisplay(surface); 175} 176 177 178// start preview mode 179status_t Camera::startPreview() 180{ 181 LOGV("startPreview"); 182 sp <ICamera> c = mCamera; 183 if (c == 0) return NO_INIT; 184 return c->startPreview(); 185} 186 187// start recording mode, must call setPreviewDisplay first 188status_t Camera::startRecording() 189{ 190 LOGV("startRecording"); 191 sp <ICamera> c = mCamera; 192 if (c == 0) return NO_INIT; 193 return c->startRecording(); 194} 195 196// stop preview mode 197void Camera::stopPreview() 198{ 199 LOGV("stopPreview"); 200 sp <ICamera> c = mCamera; 201 if (c == 0) return; 202 c->stopPreview(); 203} 204 205// stop recording mode 206void Camera::stopRecording() 207{ 208 LOGV("stopRecording"); 209 sp <ICamera> c = mCamera; 210 if (c == 0) return; 211 c->stopRecording(); 212} 213 214// release a recording frame 215void Camera::releaseRecordingFrame(const sp<IMemory>& mem) 216{ 217 LOGV("releaseRecordingFrame"); 218 sp <ICamera> c = mCamera; 219 if (c == 0) return; 220 c->releaseRecordingFrame(mem); 221} 222 223// get preview state 224bool Camera::previewEnabled() 225{ 226 LOGV("previewEnabled"); 227 sp <ICamera> c = mCamera; 228 if (c == 0) return false; 229 return c->previewEnabled(); 230} 231 232// get recording state 233bool Camera::recordingEnabled() 234{ 235 LOGV("recordingEnabled"); 236 sp <ICamera> c = mCamera; 237 if (c == 0) return false; 238 return c->recordingEnabled(); 239} 240 241status_t Camera::autoFocus() 242{ 243 LOGV("autoFocus"); 244 sp <ICamera> c = mCamera; 245 if (c == 0) return NO_INIT; 246 return c->autoFocus(); 247} 248 249status_t Camera::cancelAutoFocus() 250{ 251 LOGV("cancelAutoFocus"); 252 sp <ICamera> c = mCamera; 253 if (c == 0) return NO_INIT; 254 return c->cancelAutoFocus(); 255} 256 257// take a picture 258status_t Camera::takePicture() 259{ 260 LOGV("takePicture"); 261 sp <ICamera> c = mCamera; 262 if (c == 0) return NO_INIT; 263 return c->takePicture(); 264} 265 266// set preview/capture parameters - key/value pairs 267status_t Camera::setParameters(const String8& params) 268{ 269 LOGV("setParameters"); 270 sp <ICamera> c = mCamera; 271 if (c == 0) return NO_INIT; 272 return c->setParameters(params); 273} 274 275// get preview/capture parameters - key/value pairs 276String8 Camera::getParameters() const 277{ 278 LOGV("getParameters"); 279 String8 params; 280 sp <ICamera> c = mCamera; 281 if (c != 0) params = mCamera->getParameters(); 282 return params; 283} 284 285// send command to camera driver 286status_t Camera::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) 287{ 288 LOGV("sendCommand"); 289 sp <ICamera> c = mCamera; 290 if (c == 0) return NO_INIT; 291 return c->sendCommand(cmd, arg1, arg2); 292} 293 294void Camera::setListener(const sp<CameraListener>& listener) 295{ 296 Mutex::Autolock _l(mLock); 297 mListener = listener; 298} 299 300void Camera::setPreviewCallbackFlags(int flag) 301{ 302 LOGV("setPreviewCallbackFlags"); 303 sp <ICamera> c = mCamera; 304 if (c == 0) return; 305 mCamera->setPreviewCallbackFlag(flag); 306} 307 308// callback from camera service 309void Camera::notifyCallback(int32_t msgType, int32_t ext1, int32_t ext2) 310{ 311 sp<CameraListener> listener; 312 { 313 Mutex::Autolock _l(mLock); 314 listener = mListener; 315 } 316 if (listener != NULL) { 317 listener->notify(msgType, ext1, ext2); 318 } 319} 320 321// callback from camera service when frame or image is ready 322void Camera::dataCallback(int32_t msgType, const sp<IMemory>& dataPtr) 323{ 324 sp<CameraListener> listener; 325 { 326 Mutex::Autolock _l(mLock); 327 listener = mListener; 328 } 329 if (listener != NULL) { 330 listener->postData(msgType, dataPtr); 331 } 332} 333 334// callback from camera service when timestamped frame is ready 335void Camera::dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) 336{ 337 sp<CameraListener> listener; 338 { 339 Mutex::Autolock _l(mLock); 340 listener = mListener; 341 } 342 if (listener != NULL) { 343 listener->postDataTimestamp(timestamp, msgType, dataPtr); 344 } 345} 346 347void Camera::binderDied(const wp<IBinder>& who) { 348 LOGW("ICamera died"); 349 notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_SERVER_DIED, 0); 350} 351 352void Camera::DeathNotifier::binderDied(const wp<IBinder>& who) { 353 LOGV("binderDied"); 354 Mutex::Autolock _l(Camera::mLock); 355 Camera::mCameraService.clear(); 356 LOGW("Camera server died!"); 357} 358 359}; // namespace android 360 361