CameraService.cpp revision cb0652e5a850b2fcd919e977247e87239efaf70e
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#define LOG_TAG "CameraService" 18//#define LOG_NDEBUG 0 19 20#include <stdio.h> 21#include <string.h> 22#include <sys/types.h> 23#include <pthread.h> 24 25#include <binder/AppOpsManager.h> 26#include <binder/IPCThreadState.h> 27#include <binder/IServiceManager.h> 28#include <binder/MemoryBase.h> 29#include <binder/MemoryHeapBase.h> 30#include <cutils/atomic.h> 31#include <cutils/properties.h> 32#include <gui/Surface.h> 33#include <hardware/hardware.h> 34#include <media/AudioSystem.h> 35#include <media/IMediaHTTPService.h> 36#include <media/mediaplayer.h> 37#include <utils/Errors.h> 38#include <utils/Log.h> 39#include <utils/String16.h> 40#include <utils/Trace.h> 41#include <system/camera_vendor_tags.h> 42 43#include "CameraService.h" 44#include "api1/CameraClient.h" 45#include "api1/Camera2Client.h" 46#include "api_pro/ProCamera2Client.h" 47#include "api2/CameraDeviceClient.h" 48#include "utils/CameraTraces.h" 49#include "CameraDeviceFactory.h" 50 51namespace android { 52 53// ---------------------------------------------------------------------------- 54// Logging support -- this is for debugging only 55// Use "adb shell dumpsys media.camera -v 1" to change it. 56volatile int32_t gLogLevel = 0; 57 58#define LOG1(...) ALOGD_IF(gLogLevel >= 1, __VA_ARGS__); 59#define LOG2(...) ALOGD_IF(gLogLevel >= 2, __VA_ARGS__); 60 61static void setLogLevel(int level) { 62 android_atomic_write(level, &gLogLevel); 63} 64 65// ---------------------------------------------------------------------------- 66 67static int getCallingPid() { 68 return IPCThreadState::self()->getCallingPid(); 69} 70 71static int getCallingUid() { 72 return IPCThreadState::self()->getCallingUid(); 73} 74 75extern "C" { 76static void camera_device_status_change( 77 const struct camera_module_callbacks* callbacks, 78 int camera_id, 79 int new_status) { 80 sp<CameraService> cs = const_cast<CameraService*>( 81 static_cast<const CameraService*>(callbacks)); 82 83 cs->onDeviceStatusChanged( 84 camera_id, 85 new_status); 86} 87} // extern "C" 88 89// ---------------------------------------------------------------------------- 90 91// This is ugly and only safe if we never re-create the CameraService, but 92// should be ok for now. 93static CameraService *gCameraService; 94 95CameraService::CameraService() 96 :mSoundRef(0), mModule(0) 97{ 98 ALOGI("CameraService started (pid=%d)", getpid()); 99 gCameraService = this; 100 101 for (size_t i = 0; i < MAX_CAMERAS; ++i) { 102 mStatusList[i] = ICameraServiceListener::STATUS_PRESENT; 103 } 104 105 this->camera_device_status_change = android::camera_device_status_change; 106} 107 108void CameraService::onFirstRef() 109{ 110 LOG1("CameraService::onFirstRef"); 111 112 BnCameraService::onFirstRef(); 113 114 if (hw_get_module(CAMERA_HARDWARE_MODULE_ID, 115 (const hw_module_t **)&mModule) < 0) { 116 ALOGE("Could not load camera HAL module"); 117 mNumberOfCameras = 0; 118 } 119 else { 120 ALOGI("Loaded \"%s\" camera module", mModule->common.name); 121 mNumberOfCameras = mModule->get_number_of_cameras(); 122 if (mNumberOfCameras > MAX_CAMERAS) { 123 ALOGE("Number of cameras(%d) > MAX_CAMERAS(%d).", 124 mNumberOfCameras, MAX_CAMERAS); 125 mNumberOfCameras = MAX_CAMERAS; 126 } 127 for (int i = 0; i < mNumberOfCameras; i++) { 128 setCameraFree(i); 129 } 130 131 if (mModule->common.module_api_version >= 132 CAMERA_MODULE_API_VERSION_2_1) { 133 mModule->set_callbacks(this); 134 } 135 136 VendorTagDescriptor::clearGlobalVendorTagDescriptor(); 137 138 if (mModule->common.module_api_version >= CAMERA_MODULE_API_VERSION_2_2) { 139 setUpVendorTags(); 140 } 141 142 CameraDeviceFactory::registerService(this); 143 } 144} 145 146CameraService::~CameraService() { 147 for (int i = 0; i < mNumberOfCameras; i++) { 148 if (mBusy[i]) { 149 ALOGE("camera %d is still in use in destructor!", i); 150 } 151 } 152 153 VendorTagDescriptor::clearGlobalVendorTagDescriptor(); 154 gCameraService = NULL; 155} 156 157void CameraService::onDeviceStatusChanged(int cameraId, 158 int newStatus) 159{ 160 ALOGI("%s: Status changed for cameraId=%d, newStatus=%d", __FUNCTION__, 161 cameraId, newStatus); 162 163 if (cameraId < 0 || cameraId >= MAX_CAMERAS) { 164 ALOGE("%s: Bad camera ID %d", __FUNCTION__, cameraId); 165 return; 166 } 167 168 if ((int)getStatus(cameraId) == newStatus) { 169 ALOGE("%s: State transition to the same status 0x%x not allowed", 170 __FUNCTION__, (uint32_t)newStatus); 171 return; 172 } 173 174 /* don't do this in updateStatus 175 since it is also called from connect and we could get into a deadlock */ 176 if (newStatus == CAMERA_DEVICE_STATUS_NOT_PRESENT) { 177 Vector<sp<BasicClient> > clientsToDisconnect; 178 { 179 Mutex::Autolock al(mServiceLock); 180 181 /* Find all clients that we need to disconnect */ 182 sp<BasicClient> client = mClient[cameraId].promote(); 183 if (client.get() != NULL) { 184 clientsToDisconnect.push_back(client); 185 } 186 187 int i = cameraId; 188 for (size_t j = 0; j < mProClientList[i].size(); ++j) { 189 sp<ProClient> cl = mProClientList[i][j].promote(); 190 if (cl != NULL) { 191 clientsToDisconnect.push_back(cl); 192 } 193 } 194 } 195 196 /* now disconnect them. don't hold the lock 197 or we can get into a deadlock */ 198 199 for (size_t i = 0; i < clientsToDisconnect.size(); ++i) { 200 sp<BasicClient> client = clientsToDisconnect[i]; 201 202 client->disconnect(); 203 /** 204 * The remote app will no longer be able to call methods on the 205 * client since the client PID will be reset to 0 206 */ 207 } 208 209 ALOGV("%s: After unplug, disconnected %zu clients", 210 __FUNCTION__, clientsToDisconnect.size()); 211 } 212 213 updateStatus( 214 static_cast<ICameraServiceListener::Status>(newStatus), cameraId); 215 216} 217 218int32_t CameraService::getNumberOfCameras() { 219 return mNumberOfCameras; 220} 221 222status_t CameraService::getCameraInfo(int cameraId, 223 struct CameraInfo* cameraInfo) { 224 if (!mModule) { 225 return -ENODEV; 226 } 227 228 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 229 return BAD_VALUE; 230 } 231 232 struct camera_info info; 233 status_t rc = mModule->get_camera_info(cameraId, &info); 234 cameraInfo->facing = info.facing; 235 cameraInfo->orientation = info.orientation; 236 return rc; 237} 238 239status_t CameraService::getCameraCharacteristics(int cameraId, 240 CameraMetadata* cameraInfo) { 241 if (!cameraInfo) { 242 ALOGE("%s: cameraInfo is NULL", __FUNCTION__); 243 return BAD_VALUE; 244 } 245 246 if (!mModule) { 247 ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__); 248 return -ENODEV; 249 } 250 251 if (mModule->common.module_api_version < CAMERA_MODULE_API_VERSION_2_0) { 252 // TODO: Remove this check once HAL1 shim is in place. 253 ALOGE("%s: Only HAL module version V2 or higher supports static metadata", __FUNCTION__); 254 return BAD_VALUE; 255 } 256 257 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 258 ALOGE("%s: Invalid camera id: %d", __FUNCTION__, cameraId); 259 return BAD_VALUE; 260 } 261 262 int facing; 263 if (getDeviceVersion(cameraId, &facing) == CAMERA_DEVICE_API_VERSION_1_0) { 264 // TODO: Remove this check once HAL1 shim is in place. 265 ALOGE("%s: HAL1 doesn't support static metadata yet", __FUNCTION__); 266 return BAD_VALUE; 267 } 268 269 if (getDeviceVersion(cameraId, &facing) <= CAMERA_DEVICE_API_VERSION_2_1) { 270 // Disable HAL2.x support for camera2 API for now. 271 ALOGW("%s: HAL2.x doesn't support getCameraCharacteristics for now", __FUNCTION__); 272 return BAD_VALUE; 273 } 274 275 struct camera_info info; 276 status_t ret = mModule->get_camera_info(cameraId, &info); 277 *cameraInfo = info.static_camera_characteristics; 278 279 return ret; 280} 281 282status_t CameraService::getCameraVendorTagDescriptor(/*out*/sp<VendorTagDescriptor>& desc) { 283 if (!mModule) { 284 ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__); 285 return -ENODEV; 286 } 287 288 if (mModule->common.module_api_version < CAMERA_MODULE_API_VERSION_2_2) { 289 // TODO: Remove this check once HAL1 shim is in place. 290 ALOGW("%s: Only HAL module version V2.2 or higher supports vendor tags", __FUNCTION__); 291 return -EOPNOTSUPP; 292 } 293 294 desc = VendorTagDescriptor::getGlobalVendorTagDescriptor(); 295 return OK; 296} 297 298int CameraService::getDeviceVersion(int cameraId, int* facing) { 299 struct camera_info info; 300 if (mModule->get_camera_info(cameraId, &info) != OK) { 301 return -1; 302 } 303 304 int deviceVersion; 305 if (mModule->common.module_api_version >= CAMERA_MODULE_API_VERSION_2_0) { 306 deviceVersion = info.device_version; 307 } else { 308 deviceVersion = CAMERA_DEVICE_API_VERSION_1_0; 309 } 310 311 if (facing) { 312 *facing = info.facing; 313 } 314 315 return deviceVersion; 316} 317 318bool CameraService::isValidCameraId(int cameraId) { 319 int facing; 320 int deviceVersion = getDeviceVersion(cameraId, &facing); 321 322 switch(deviceVersion) { 323 case CAMERA_DEVICE_API_VERSION_1_0: 324 case CAMERA_DEVICE_API_VERSION_2_0: 325 case CAMERA_DEVICE_API_VERSION_2_1: 326 case CAMERA_DEVICE_API_VERSION_3_0: 327 case CAMERA_DEVICE_API_VERSION_3_1: 328 case CAMERA_DEVICE_API_VERSION_3_2: 329 return true; 330 default: 331 return false; 332 } 333 334 return false; 335} 336 337bool CameraService::setUpVendorTags() { 338 vendor_tag_ops_t vOps = vendor_tag_ops_t(); 339 340 // Check if vendor operations have been implemented 341 if (mModule->get_vendor_tag_ops == NULL) { 342 ALOGI("%s: No vendor tags defined for this device.", __FUNCTION__); 343 return false; 344 } 345 346 ATRACE_BEGIN("camera3->get_metadata_vendor_tag_ops"); 347 mModule->get_vendor_tag_ops(&vOps); 348 ATRACE_END(); 349 350 // Ensure all vendor operations are present 351 if (vOps.get_tag_count == NULL || vOps.get_all_tags == NULL || 352 vOps.get_section_name == NULL || vOps.get_tag_name == NULL || 353 vOps.get_tag_type == NULL) { 354 ALOGE("%s: Vendor tag operations not fully defined. Ignoring definitions." 355 , __FUNCTION__); 356 return false; 357 } 358 359 // Read all vendor tag definitions into a descriptor 360 sp<VendorTagDescriptor> desc; 361 status_t res; 362 if ((res = VendorTagDescriptor::createDescriptorFromOps(&vOps, /*out*/desc)) 363 != OK) { 364 ALOGE("%s: Could not generate descriptor from vendor tag operations," 365 "received error %s (%d). Camera clients will not be able to use" 366 "vendor tags", __FUNCTION__, strerror(res), res); 367 return false; 368 } 369 370 // Set the global descriptor to use with camera metadata 371 VendorTagDescriptor::setAsGlobalVendorTagDescriptor(desc); 372 return true; 373} 374 375status_t CameraService::validateConnect(int cameraId, 376 /*inout*/ 377 int& clientUid) const { 378 379 int callingPid = getCallingPid(); 380 381 if (clientUid == USE_CALLING_UID) { 382 clientUid = getCallingUid(); 383 } else { 384 // We only trust our own process to forward client UIDs 385 if (callingPid != getpid()) { 386 ALOGE("CameraService::connect X (pid %d) rejected (don't trust clientUid)", 387 callingPid); 388 return PERMISSION_DENIED; 389 } 390 } 391 392 if (!mModule) { 393 ALOGE("Camera HAL module not loaded"); 394 return -ENODEV; 395 } 396 397 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 398 ALOGE("CameraService::connect X (pid %d) rejected (invalid cameraId %d).", 399 callingPid, cameraId); 400 return -ENODEV; 401 } 402 403 char value[PROPERTY_VALUE_MAX]; 404 property_get("sys.secpolicy.camera.disabled", value, "0"); 405 if (strcmp(value, "1") == 0) { 406 // Camera is disabled by DevicePolicyManager. 407 ALOGI("Camera is disabled. connect X (pid %d) rejected", callingPid); 408 return -EACCES; 409 } 410 411 ICameraServiceListener::Status currentStatus = getStatus(cameraId); 412 if (currentStatus == ICameraServiceListener::STATUS_NOT_PRESENT) { 413 ALOGI("Camera is not plugged in," 414 " connect X (pid %d) rejected", callingPid); 415 return -ENODEV; 416 } else if (currentStatus == ICameraServiceListener::STATUS_ENUMERATING) { 417 ALOGI("Camera is enumerating," 418 " connect X (pid %d) rejected", callingPid); 419 return -EBUSY; 420 } 421 // Else don't check for STATUS_NOT_AVAILABLE. 422 // -- It's done implicitly in canConnectUnsafe /w the mBusy array 423 424 return OK; 425} 426 427bool CameraService::canConnectUnsafe(int cameraId, 428 const String16& clientPackageName, 429 const sp<IBinder>& remoteCallback, 430 sp<BasicClient> &client) { 431 String8 clientName8(clientPackageName); 432 int callingPid = getCallingPid(); 433 434 if (mClient[cameraId] != 0) { 435 client = mClient[cameraId].promote(); 436 if (client != 0) { 437 if (remoteCallback == client->getRemote()) { 438 LOG1("CameraService::connect X (pid %d) (the same client)", 439 callingPid); 440 return true; 441 } else { 442 // TODOSC: need to support 1 regular client, 443 // multiple shared clients here 444 ALOGW("CameraService::connect X (pid %d) rejected" 445 " (existing client).", callingPid); 446 return false; 447 } 448 } 449 mClient[cameraId].clear(); 450 } 451 452 /* 453 mBusy is set to false as the last step of the Client destructor, 454 after which it is guaranteed that the Client destructor has finished ( 455 including any inherited destructors) 456 457 We only need this for a Client subclasses since we don't allow 458 multiple Clents to be opened concurrently, but multiple BasicClient 459 would be fine 460 */ 461 if (mBusy[cameraId]) { 462 ALOGW("CameraService::connect X (pid %d, \"%s\") rejected" 463 " (camera %d is still busy).", callingPid, 464 clientName8.string(), cameraId); 465 return false; 466 } 467 468 return true; 469} 470 471status_t CameraService::connect( 472 const sp<ICameraClient>& cameraClient, 473 int cameraId, 474 const String16& clientPackageName, 475 int clientUid, 476 /*out*/ 477 sp<ICamera>& device) { 478 479 String8 clientName8(clientPackageName); 480 int callingPid = getCallingPid(); 481 482 LOG1("CameraService::connect E (pid %d \"%s\", id %d)", callingPid, 483 clientName8.string(), cameraId); 484 485 status_t status = validateConnect(cameraId, /*inout*/clientUid); 486 if (status != OK) { 487 return status; 488 } 489 490 491 sp<Client> client; 492 { 493 Mutex::Autolock lock(mServiceLock); 494 sp<BasicClient> clientTmp; 495 if (!canConnectUnsafe(cameraId, clientPackageName, 496 cameraClient->asBinder(), 497 /*out*/clientTmp)) { 498 return -EBUSY; 499 } else if (client.get() != NULL) { 500 device = static_cast<Client*>(clientTmp.get()); 501 return OK; 502 } 503 504 int facing = -1; 505 int deviceVersion = getDeviceVersion(cameraId, &facing); 506 507 // If there are other non-exclusive users of the camera, 508 // this will tear them down before we can reuse the camera 509 if (isValidCameraId(cameraId)) { 510 // transition from PRESENT -> NOT_AVAILABLE 511 updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE, 512 cameraId); 513 } 514 515 switch(deviceVersion) { 516 case CAMERA_DEVICE_API_VERSION_1_0: 517 client = new CameraClient(this, cameraClient, 518 clientPackageName, cameraId, 519 facing, callingPid, clientUid, getpid()); 520 break; 521 case CAMERA_DEVICE_API_VERSION_2_0: 522 case CAMERA_DEVICE_API_VERSION_2_1: 523 case CAMERA_DEVICE_API_VERSION_3_0: 524 case CAMERA_DEVICE_API_VERSION_3_1: 525 case CAMERA_DEVICE_API_VERSION_3_2: 526 client = new Camera2Client(this, cameraClient, 527 clientPackageName, cameraId, 528 facing, callingPid, clientUid, getpid(), 529 deviceVersion); 530 break; 531 case -1: 532 ALOGE("Invalid camera id %d", cameraId); 533 return BAD_VALUE; 534 default: 535 ALOGE("Unknown camera device HAL version: %d", deviceVersion); 536 return INVALID_OPERATION; 537 } 538 539 status_t status = connectFinishUnsafe(client, client->getRemote()); 540 if (status != OK) { 541 // this is probably not recoverable.. maybe the client can try again 542 // OK: we can only get here if we were originally in PRESENT state 543 updateStatus(ICameraServiceListener::STATUS_PRESENT, cameraId); 544 return status; 545 } 546 547 mClient[cameraId] = client; 548 LOG1("CameraService::connect X (id %d, this pid is %d)", cameraId, 549 getpid()); 550 } 551 // important: release the mutex here so the client can call back 552 // into the service from its destructor (can be at the end of the call) 553 554 device = client; 555 return OK; 556} 557 558status_t CameraService::connectFinishUnsafe(const sp<BasicClient>& client, 559 const sp<IBinder>& remoteCallback) { 560 status_t status = client->initialize(mModule); 561 if (status != OK) { 562 return status; 563 } 564 565 remoteCallback->linkToDeath(this); 566 567 return OK; 568} 569 570status_t CameraService::connectPro( 571 const sp<IProCameraCallbacks>& cameraCb, 572 int cameraId, 573 const String16& clientPackageName, 574 int clientUid, 575 /*out*/ 576 sp<IProCameraUser>& device) 577{ 578 String8 clientName8(clientPackageName); 579 int callingPid = getCallingPid(); 580 581 LOG1("CameraService::connectPro E (pid %d \"%s\", id %d)", callingPid, 582 clientName8.string(), cameraId); 583 status_t status = validateConnect(cameraId, /*inout*/clientUid); 584 if (status != OK) { 585 return status; 586 } 587 588 sp<ProClient> client; 589 { 590 Mutex::Autolock lock(mServiceLock); 591 { 592 sp<BasicClient> client; 593 if (!canConnectUnsafe(cameraId, clientPackageName, 594 cameraCb->asBinder(), 595 /*out*/client)) { 596 return -EBUSY; 597 } 598 } 599 600 int facing = -1; 601 int deviceVersion = getDeviceVersion(cameraId, &facing); 602 603 switch(deviceVersion) { 604 case CAMERA_DEVICE_API_VERSION_1_0: 605 ALOGE("Camera id %d uses HALv1, doesn't support ProCamera", 606 cameraId); 607 return -EOPNOTSUPP; 608 break; 609 case CAMERA_DEVICE_API_VERSION_2_0: 610 case CAMERA_DEVICE_API_VERSION_2_1: 611 case CAMERA_DEVICE_API_VERSION_3_0: 612 case CAMERA_DEVICE_API_VERSION_3_1: 613 case CAMERA_DEVICE_API_VERSION_3_2: 614 client = new ProCamera2Client(this, cameraCb, String16(), 615 cameraId, facing, callingPid, USE_CALLING_UID, getpid()); 616 break; 617 case -1: 618 ALOGE("Invalid camera id %d", cameraId); 619 return BAD_VALUE; 620 default: 621 ALOGE("Unknown camera device HAL version: %d", deviceVersion); 622 return INVALID_OPERATION; 623 } 624 625 status_t status = connectFinishUnsafe(client, client->getRemote()); 626 if (status != OK) { 627 return status; 628 } 629 630 mProClientList[cameraId].push(client); 631 632 LOG1("CameraService::connectPro X (id %d, this pid is %d)", cameraId, 633 getpid()); 634 } 635 // important: release the mutex here so the client can call back 636 // into the service from its destructor (can be at the end of the call) 637 device = client; 638 return OK; 639} 640 641status_t CameraService::connectDevice( 642 const sp<ICameraDeviceCallbacks>& cameraCb, 643 int cameraId, 644 const String16& clientPackageName, 645 int clientUid, 646 /*out*/ 647 sp<ICameraDeviceUser>& device) 648{ 649 650 String8 clientName8(clientPackageName); 651 int callingPid = getCallingPid(); 652 653 LOG1("CameraService::connectDevice E (pid %d \"%s\", id %d)", callingPid, 654 clientName8.string(), cameraId); 655 656 status_t status = validateConnect(cameraId, /*inout*/clientUid); 657 if (status != OK) { 658 return status; 659 } 660 661 sp<CameraDeviceClient> client; 662 { 663 Mutex::Autolock lock(mServiceLock); 664 { 665 sp<BasicClient> client; 666 if (!canConnectUnsafe(cameraId, clientPackageName, 667 cameraCb->asBinder(), 668 /*out*/client)) { 669 return -EBUSY; 670 } 671 } 672 673 int facing = -1; 674 int deviceVersion = getDeviceVersion(cameraId, &facing); 675 676 // If there are other non-exclusive users of the camera, 677 // this will tear them down before we can reuse the camera 678 if (isValidCameraId(cameraId)) { 679 // transition from PRESENT -> NOT_AVAILABLE 680 updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE, 681 cameraId); 682 } 683 684 switch(deviceVersion) { 685 case CAMERA_DEVICE_API_VERSION_1_0: 686 ALOGW("Camera using old HAL version: %d", deviceVersion); 687 return -EOPNOTSUPP; 688 // TODO: don't allow 2.0 Only allow 2.1 and higher 689 case CAMERA_DEVICE_API_VERSION_2_0: 690 case CAMERA_DEVICE_API_VERSION_2_1: 691 case CAMERA_DEVICE_API_VERSION_3_0: 692 case CAMERA_DEVICE_API_VERSION_3_1: 693 case CAMERA_DEVICE_API_VERSION_3_2: 694 client = new CameraDeviceClient(this, cameraCb, String16(), 695 cameraId, facing, callingPid, USE_CALLING_UID, getpid()); 696 break; 697 case -1: 698 ALOGE("Invalid camera id %d", cameraId); 699 return BAD_VALUE; 700 default: 701 ALOGE("Unknown camera device HAL version: %d", deviceVersion); 702 return INVALID_OPERATION; 703 } 704 705 status_t status = connectFinishUnsafe(client, client->getRemote()); 706 if (status != OK) { 707 // this is probably not recoverable.. maybe the client can try again 708 // OK: we can only get here if we were originally in PRESENT state 709 updateStatus(ICameraServiceListener::STATUS_PRESENT, cameraId); 710 return status; 711 } 712 713 LOG1("CameraService::connectDevice X (id %d, this pid is %d)", cameraId, 714 getpid()); 715 716 mClient[cameraId] = client; 717 } 718 // important: release the mutex here so the client can call back 719 // into the service from its destructor (can be at the end of the call) 720 721 device = client; 722 return OK; 723} 724 725 726status_t CameraService::addListener( 727 const sp<ICameraServiceListener>& listener) { 728 ALOGV("%s: Add listener %p", __FUNCTION__, listener.get()); 729 730 if (listener == 0) { 731 ALOGE("%s: Listener must not be null", __FUNCTION__); 732 return BAD_VALUE; 733 } 734 735 Mutex::Autolock lock(mServiceLock); 736 737 Vector<sp<ICameraServiceListener> >::iterator it, end; 738 for (it = mListenerList.begin(); it != mListenerList.end(); ++it) { 739 if ((*it)->asBinder() == listener->asBinder()) { 740 ALOGW("%s: Tried to add listener %p which was already subscribed", 741 __FUNCTION__, listener.get()); 742 return ALREADY_EXISTS; 743 } 744 } 745 746 mListenerList.push_back(listener); 747 748 /* Immediately signal current status to this listener only */ 749 { 750 Mutex::Autolock m(mStatusMutex) ; 751 int numCams = getNumberOfCameras(); 752 for (int i = 0; i < numCams; ++i) { 753 listener->onStatusChanged(mStatusList[i], i); 754 } 755 } 756 757 return OK; 758} 759status_t CameraService::removeListener( 760 const sp<ICameraServiceListener>& listener) { 761 ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get()); 762 763 if (listener == 0) { 764 ALOGE("%s: Listener must not be null", __FUNCTION__); 765 return BAD_VALUE; 766 } 767 768 Mutex::Autolock lock(mServiceLock); 769 770 Vector<sp<ICameraServiceListener> >::iterator it; 771 for (it = mListenerList.begin(); it != mListenerList.end(); ++it) { 772 if ((*it)->asBinder() == listener->asBinder()) { 773 mListenerList.erase(it); 774 return OK; 775 } 776 } 777 778 ALOGW("%s: Tried to remove a listener %p which was not subscribed", 779 __FUNCTION__, listener.get()); 780 781 return BAD_VALUE; 782} 783 784void CameraService::removeClientByRemote(const wp<IBinder>& remoteBinder) { 785 int callingPid = getCallingPid(); 786 LOG1("CameraService::removeClientByRemote E (pid %d)", callingPid); 787 788 // Declare this before the lock to make absolutely sure the 789 // destructor won't be called with the lock held. 790 Mutex::Autolock lock(mServiceLock); 791 792 int outIndex; 793 sp<BasicClient> client = findClientUnsafe(remoteBinder, outIndex); 794 795 if (client != 0) { 796 // Found our camera, clear and leave. 797 LOG1("removeClient: clear camera %d", outIndex); 798 mClient[outIndex].clear(); 799 800 client->getRemote()->unlinkToDeath(this); 801 } else { 802 803 sp<ProClient> clientPro = findProClientUnsafe(remoteBinder); 804 805 if (clientPro != NULL) { 806 // Found our camera, clear and leave. 807 LOG1("removeClient: clear pro %p", clientPro.get()); 808 809 clientPro->getRemoteCallback()->asBinder()->unlinkToDeath(this); 810 } 811 } 812 813 LOG1("CameraService::removeClientByRemote X (pid %d)", callingPid); 814} 815 816sp<CameraService::ProClient> CameraService::findProClientUnsafe( 817 const wp<IBinder>& cameraCallbacksRemote) 818{ 819 sp<ProClient> clientPro; 820 821 for (int i = 0; i < mNumberOfCameras; ++i) { 822 Vector<size_t> removeIdx; 823 824 for (size_t j = 0; j < mProClientList[i].size(); ++j) { 825 wp<ProClient> cl = mProClientList[i][j]; 826 827 sp<ProClient> clStrong = cl.promote(); 828 if (clStrong != NULL && clStrong->getRemote() == cameraCallbacksRemote) { 829 clientPro = clStrong; 830 break; 831 } else if (clStrong == NULL) { 832 // mark to clean up dead ptr 833 removeIdx.push(j); 834 } 835 } 836 837 // remove stale ptrs (in reverse so the indices dont change) 838 for (ssize_t j = (ssize_t)removeIdx.size() - 1; j >= 0; --j) { 839 mProClientList[i].removeAt(removeIdx[j]); 840 } 841 842 } 843 844 return clientPro; 845} 846 847sp<CameraService::BasicClient> CameraService::findClientUnsafe( 848 const wp<IBinder>& cameraClient, int& outIndex) { 849 sp<BasicClient> client; 850 851 for (int i = 0; i < mNumberOfCameras; i++) { 852 853 // This happens when we have already disconnected (or this is 854 // just another unused camera). 855 if (mClient[i] == 0) continue; 856 857 // Promote mClient. It can fail if we are called from this path: 858 // Client::~Client() -> disconnect() -> removeClientByRemote(). 859 client = mClient[i].promote(); 860 861 // Clean up stale client entry 862 if (client == NULL) { 863 mClient[i].clear(); 864 continue; 865 } 866 867 if (cameraClient == client->getRemote()) { 868 // Found our camera 869 outIndex = i; 870 return client; 871 } 872 } 873 874 outIndex = -1; 875 return NULL; 876} 877 878CameraService::BasicClient* CameraService::getClientByIdUnsafe(int cameraId) { 879 if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL; 880 return mClient[cameraId].unsafe_get(); 881} 882 883Mutex* CameraService::getClientLockById(int cameraId) { 884 if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL; 885 return &mClientLock[cameraId]; 886} 887 888sp<CameraService::BasicClient> CameraService::getClientByRemote( 889 const wp<IBinder>& cameraClient) { 890 891 // Declare this before the lock to make absolutely sure the 892 // destructor won't be called with the lock held. 893 sp<BasicClient> client; 894 895 Mutex::Autolock lock(mServiceLock); 896 897 int outIndex; 898 client = findClientUnsafe(cameraClient, outIndex); 899 900 return client; 901} 902 903status_t CameraService::onTransact( 904 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) { 905 // Permission checks 906 switch (code) { 907 case BnCameraService::CONNECT: 908 case BnCameraService::CONNECT_PRO: 909 const int pid = getCallingPid(); 910 const int self_pid = getpid(); 911 if (pid != self_pid) { 912 // we're called from a different process, do the real check 913 if (!checkCallingPermission( 914 String16("android.permission.CAMERA"))) { 915 const int uid = getCallingUid(); 916 ALOGE("Permission Denial: " 917 "can't use the camera pid=%d, uid=%d", pid, uid); 918 return PERMISSION_DENIED; 919 } 920 } 921 break; 922 } 923 924 return BnCameraService::onTransact(code, data, reply, flags); 925} 926 927// The reason we need this busy bit is a new CameraService::connect() request 928// may come in while the previous Client's destructor has not been run or is 929// still running. If the last strong reference of the previous Client is gone 930// but the destructor has not been finished, we should not allow the new Client 931// to be created because we need to wait for the previous Client to tear down 932// the hardware first. 933void CameraService::setCameraBusy(int cameraId) { 934 android_atomic_write(1, &mBusy[cameraId]); 935 936 ALOGV("setCameraBusy cameraId=%d", cameraId); 937} 938 939void CameraService::setCameraFree(int cameraId) { 940 android_atomic_write(0, &mBusy[cameraId]); 941 942 ALOGV("setCameraFree cameraId=%d", cameraId); 943} 944 945// We share the media players for shutter and recording sound for all clients. 946// A reference count is kept to determine when we will actually release the 947// media players. 948 949MediaPlayer* CameraService::newMediaPlayer(const char *file) { 950 MediaPlayer* mp = new MediaPlayer(); 951 if (mp->setDataSource(NULL /* httpService */, file, NULL) == NO_ERROR) { 952 mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE); 953 mp->prepare(); 954 } else { 955 ALOGE("Failed to load CameraService sounds: %s", file); 956 return NULL; 957 } 958 return mp; 959} 960 961void CameraService::loadSound() { 962 Mutex::Autolock lock(mSoundLock); 963 LOG1("CameraService::loadSound ref=%d", mSoundRef); 964 if (mSoundRef++) return; 965 966 mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg"); 967 mSoundPlayer[SOUND_RECORDING] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg"); 968} 969 970void CameraService::releaseSound() { 971 Mutex::Autolock lock(mSoundLock); 972 LOG1("CameraService::releaseSound ref=%d", mSoundRef); 973 if (--mSoundRef) return; 974 975 for (int i = 0; i < NUM_SOUNDS; i++) { 976 if (mSoundPlayer[i] != 0) { 977 mSoundPlayer[i]->disconnect(); 978 mSoundPlayer[i].clear(); 979 } 980 } 981} 982 983void CameraService::playSound(sound_kind kind) { 984 LOG1("playSound(%d)", kind); 985 Mutex::Autolock lock(mSoundLock); 986 sp<MediaPlayer> player = mSoundPlayer[kind]; 987 if (player != 0) { 988 player->seekTo(0); 989 player->start(); 990 } 991} 992 993// ---------------------------------------------------------------------------- 994 995CameraService::Client::Client(const sp<CameraService>& cameraService, 996 const sp<ICameraClient>& cameraClient, 997 const String16& clientPackageName, 998 int cameraId, int cameraFacing, 999 int clientPid, uid_t clientUid, 1000 int servicePid) : 1001 CameraService::BasicClient(cameraService, cameraClient->asBinder(), 1002 clientPackageName, 1003 cameraId, cameraFacing, 1004 clientPid, clientUid, 1005 servicePid) 1006{ 1007 int callingPid = getCallingPid(); 1008 LOG1("Client::Client E (pid %d, id %d)", callingPid, cameraId); 1009 1010 mRemoteCallback = cameraClient; 1011 1012 cameraService->setCameraBusy(cameraId); 1013 cameraService->loadSound(); 1014 1015 LOG1("Client::Client X (pid %d, id %d)", callingPid, cameraId); 1016} 1017 1018// tear down the client 1019CameraService::Client::~Client() { 1020 ALOGV("~Client"); 1021 mDestructionStarted = true; 1022 1023 mCameraService->releaseSound(); 1024 // unconditionally disconnect. function is idempotent 1025 Client::disconnect(); 1026} 1027 1028CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService, 1029 const sp<IBinder>& remoteCallback, 1030 const String16& clientPackageName, 1031 int cameraId, int cameraFacing, 1032 int clientPid, uid_t clientUid, 1033 int servicePid): 1034 mClientPackageName(clientPackageName) 1035{ 1036 mCameraService = cameraService; 1037 mRemoteBinder = remoteCallback; 1038 mCameraId = cameraId; 1039 mCameraFacing = cameraFacing; 1040 mClientPid = clientPid; 1041 mClientUid = clientUid; 1042 mServicePid = servicePid; 1043 mOpsActive = false; 1044 mDestructionStarted = false; 1045} 1046 1047CameraService::BasicClient::~BasicClient() { 1048 ALOGV("~BasicClient"); 1049 mDestructionStarted = true; 1050} 1051 1052void CameraService::BasicClient::disconnect() { 1053 ALOGV("BasicClient::disconnect"); 1054 mCameraService->removeClientByRemote(mRemoteBinder); 1055 // client shouldn't be able to call into us anymore 1056 mClientPid = 0; 1057} 1058 1059status_t CameraService::BasicClient::startCameraOps() { 1060 int32_t res; 1061 1062 mOpsCallback = new OpsCallback(this); 1063 1064 { 1065 ALOGV("%s: Start camera ops, package name = %s, client UID = %d", 1066 __FUNCTION__, String8(mClientPackageName).string(), mClientUid); 1067 } 1068 1069 mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA, 1070 mClientPackageName, mOpsCallback); 1071 res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA, 1072 mClientUid, mClientPackageName); 1073 1074 if (res != AppOpsManager::MODE_ALLOWED) { 1075 ALOGI("Camera %d: Access for \"%s\" has been revoked", 1076 mCameraId, String8(mClientPackageName).string()); 1077 return PERMISSION_DENIED; 1078 } 1079 mOpsActive = true; 1080 return OK; 1081} 1082 1083status_t CameraService::BasicClient::finishCameraOps() { 1084 if (mOpsActive) { 1085 mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid, 1086 mClientPackageName); 1087 mOpsActive = false; 1088 } 1089 mAppOpsManager.stopWatchingMode(mOpsCallback); 1090 mOpsCallback.clear(); 1091 1092 return OK; 1093} 1094 1095void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) { 1096 String8 name(packageName); 1097 String8 myName(mClientPackageName); 1098 1099 if (op != AppOpsManager::OP_CAMERA) { 1100 ALOGW("Unexpected app ops notification received: %d", op); 1101 return; 1102 } 1103 1104 int32_t res; 1105 res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA, 1106 mClientUid, mClientPackageName); 1107 ALOGV("checkOp returns: %d, %s ", res, 1108 res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" : 1109 res == AppOpsManager::MODE_IGNORED ? "IGNORED" : 1110 res == AppOpsManager::MODE_ERRORED ? "ERRORED" : 1111 "UNKNOWN"); 1112 1113 if (res != AppOpsManager::MODE_ALLOWED) { 1114 ALOGI("Camera %d: Access for \"%s\" revoked", mCameraId, 1115 myName.string()); 1116 // Reset the client PID to allow server-initiated disconnect, 1117 // and to prevent further calls by client. 1118 mClientPid = getCallingPid(); 1119 CaptureResultExtras resultExtras; // a dummy result (invalid) 1120 notifyError(ICameraDeviceCallbacks::ERROR_CAMERA_SERVICE, resultExtras); 1121 disconnect(); 1122 } 1123} 1124 1125// ---------------------------------------------------------------------------- 1126 1127Mutex* CameraService::Client::getClientLockFromCookie(void* user) { 1128 return gCameraService->getClientLockById((int)(intptr_t) user); 1129} 1130 1131// Provide client pointer for callbacks. Client lock returned from getClientLockFromCookie should 1132// be acquired for this to be safe 1133CameraService::Client* CameraService::Client::getClientFromCookie(void* user) { 1134 BasicClient *basicClient = gCameraService->getClientByIdUnsafe((int)(intptr_t) user); 1135 // OK: only CameraClient calls this, and they already cast anyway. 1136 Client* client = static_cast<Client*>(basicClient); 1137 1138 // This could happen if the Client is in the process of shutting down (the 1139 // last strong reference is gone, but the destructor hasn't finished 1140 // stopping the hardware). 1141 if (client == NULL) return NULL; 1142 1143 // destruction already started, so should not be accessed 1144 if (client->mDestructionStarted) return NULL; 1145 1146 return client; 1147} 1148 1149void CameraService::Client::notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode, 1150 const CaptureResultExtras& resultExtras) { 1151 mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0); 1152} 1153 1154// NOTE: function is idempotent 1155void CameraService::Client::disconnect() { 1156 ALOGV("Client::disconnect"); 1157 BasicClient::disconnect(); 1158 mCameraService->setCameraFree(mCameraId); 1159 1160 StatusVector rejectSourceStates; 1161 rejectSourceStates.push_back(ICameraServiceListener::STATUS_NOT_PRESENT); 1162 rejectSourceStates.push_back(ICameraServiceListener::STATUS_ENUMERATING); 1163 1164 // Transition to PRESENT if the camera is not in either of above 2 states 1165 mCameraService->updateStatus(ICameraServiceListener::STATUS_PRESENT, 1166 mCameraId, 1167 &rejectSourceStates); 1168} 1169 1170CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client): 1171 mClient(client) { 1172} 1173 1174void CameraService::Client::OpsCallback::opChanged(int32_t op, 1175 const String16& packageName) { 1176 sp<BasicClient> client = mClient.promote(); 1177 if (client != NULL) { 1178 client->opChanged(op, packageName); 1179 } 1180} 1181 1182// ---------------------------------------------------------------------------- 1183// IProCamera 1184// ---------------------------------------------------------------------------- 1185 1186CameraService::ProClient::ProClient(const sp<CameraService>& cameraService, 1187 const sp<IProCameraCallbacks>& remoteCallback, 1188 const String16& clientPackageName, 1189 int cameraId, 1190 int cameraFacing, 1191 int clientPid, 1192 uid_t clientUid, 1193 int servicePid) 1194 : CameraService::BasicClient(cameraService, remoteCallback->asBinder(), 1195 clientPackageName, cameraId, cameraFacing, 1196 clientPid, clientUid, servicePid) 1197{ 1198 mRemoteCallback = remoteCallback; 1199} 1200 1201CameraService::ProClient::~ProClient() { 1202} 1203 1204void CameraService::ProClient::notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode, 1205 const CaptureResultExtras& resultExtras) { 1206 mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0); 1207} 1208 1209// ---------------------------------------------------------------------------- 1210 1211static const int kDumpLockRetries = 50; 1212static const int kDumpLockSleep = 60000; 1213 1214static bool tryLock(Mutex& mutex) 1215{ 1216 bool locked = false; 1217 for (int i = 0; i < kDumpLockRetries; ++i) { 1218 if (mutex.tryLock() == NO_ERROR) { 1219 locked = true; 1220 break; 1221 } 1222 usleep(kDumpLockSleep); 1223 } 1224 return locked; 1225} 1226 1227status_t CameraService::dump(int fd, const Vector<String16>& args) { 1228 String8 result; 1229 if (checkCallingPermission(String16("android.permission.DUMP")) == false) { 1230 result.appendFormat("Permission Denial: " 1231 "can't dump CameraService from pid=%d, uid=%d\n", 1232 getCallingPid(), 1233 getCallingUid()); 1234 write(fd, result.string(), result.size()); 1235 } else { 1236 bool locked = tryLock(mServiceLock); 1237 // failed to lock - CameraService is probably deadlocked 1238 if (!locked) { 1239 result.append("CameraService may be deadlocked\n"); 1240 write(fd, result.string(), result.size()); 1241 } 1242 1243 bool hasClient = false; 1244 if (!mModule) { 1245 result = String8::format("No camera module available!\n"); 1246 write(fd, result.string(), result.size()); 1247 if (locked) mServiceLock.unlock(); 1248 return NO_ERROR; 1249 } 1250 1251 result = String8::format("Camera module HAL API version: 0x%x\n", 1252 mModule->common.hal_api_version); 1253 result.appendFormat("Camera module API version: 0x%x\n", 1254 mModule->common.module_api_version); 1255 result.appendFormat("Camera module name: %s\n", 1256 mModule->common.name); 1257 result.appendFormat("Camera module author: %s\n", 1258 mModule->common.author); 1259 result.appendFormat("Number of camera devices: %d\n\n", mNumberOfCameras); 1260 write(fd, result.string(), result.size()); 1261 for (int i = 0; i < mNumberOfCameras; i++) { 1262 result = String8::format("Camera %d static information:\n", i); 1263 camera_info info; 1264 1265 status_t rc = mModule->get_camera_info(i, &info); 1266 if (rc != OK) { 1267 result.appendFormat(" Error reading static information!\n"); 1268 write(fd, result.string(), result.size()); 1269 } else { 1270 result.appendFormat(" Facing: %s\n", 1271 info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT"); 1272 result.appendFormat(" Orientation: %d\n", info.orientation); 1273 int deviceVersion; 1274 if (mModule->common.module_api_version < 1275 CAMERA_MODULE_API_VERSION_2_0) { 1276 deviceVersion = CAMERA_DEVICE_API_VERSION_1_0; 1277 } else { 1278 deviceVersion = info.device_version; 1279 } 1280 result.appendFormat(" Device version: 0x%x\n", deviceVersion); 1281 if (deviceVersion >= CAMERA_DEVICE_API_VERSION_2_0) { 1282 result.appendFormat(" Device static metadata:\n"); 1283 write(fd, result.string(), result.size()); 1284 dump_indented_camera_metadata(info.static_camera_characteristics, 1285 fd, 2, 4); 1286 } else { 1287 write(fd, result.string(), result.size()); 1288 } 1289 } 1290 1291 sp<BasicClient> client = mClient[i].promote(); 1292 if (client == 0) { 1293 result = String8::format(" Device is closed, no client instance\n"); 1294 write(fd, result.string(), result.size()); 1295 continue; 1296 } 1297 hasClient = true; 1298 result = String8::format(" Device is open. Client instance dump:\n"); 1299 write(fd, result.string(), result.size()); 1300 client->dump(fd, args); 1301 } 1302 if (!hasClient) { 1303 result = String8::format("\nNo active camera clients yet.\n"); 1304 write(fd, result.string(), result.size()); 1305 } 1306 1307 if (locked) mServiceLock.unlock(); 1308 1309 // Dump camera traces if there were any 1310 write(fd, "\n", 1); 1311 camera3::CameraTraces::dump(fd, args); 1312 1313 // change logging level 1314 int n = args.size(); 1315 for (int i = 0; i + 1 < n; i++) { 1316 String16 verboseOption("-v"); 1317 if (args[i] == verboseOption) { 1318 String8 levelStr(args[i+1]); 1319 int level = atoi(levelStr.string()); 1320 result = String8::format("\nSetting log level to %d.\n", level); 1321 setLogLevel(level); 1322 write(fd, result.string(), result.size()); 1323 } 1324 } 1325 1326 } 1327 return NO_ERROR; 1328} 1329 1330/*virtual*/void CameraService::binderDied( 1331 const wp<IBinder> &who) { 1332 1333 /** 1334 * While tempting to promote the wp<IBinder> into a sp, 1335 * it's actually not supported by the binder driver 1336 */ 1337 1338 ALOGV("java clients' binder died"); 1339 1340 sp<BasicClient> cameraClient = getClientByRemote(who); 1341 1342 if (cameraClient == 0) { 1343 ALOGV("java clients' binder death already cleaned up (normal case)"); 1344 return; 1345 } 1346 1347 ALOGW("Disconnecting camera client %p since the binder for it " 1348 "died (this pid %d)", cameraClient.get(), getCallingPid()); 1349 1350 cameraClient->disconnect(); 1351 1352} 1353 1354void CameraService::updateStatus(ICameraServiceListener::Status status, 1355 int32_t cameraId, 1356 const StatusVector *rejectSourceStates) { 1357 // do not lock mServiceLock here or can get into a deadlock from 1358 // connect() -> ProClient::disconnect -> updateStatus 1359 Mutex::Autolock lock(mStatusMutex); 1360 1361 ICameraServiceListener::Status oldStatus = mStatusList[cameraId]; 1362 1363 mStatusList[cameraId] = status; 1364 1365 if (oldStatus != status) { 1366 ALOGV("%s: Status has changed for camera ID %d from 0x%x to 0x%x", 1367 __FUNCTION__, cameraId, (uint32_t)oldStatus, (uint32_t)status); 1368 1369 if (oldStatus == ICameraServiceListener::STATUS_NOT_PRESENT && 1370 (status != ICameraServiceListener::STATUS_PRESENT && 1371 status != ICameraServiceListener::STATUS_ENUMERATING)) { 1372 1373 ALOGW("%s: From NOT_PRESENT can only transition into PRESENT" 1374 " or ENUMERATING", __FUNCTION__); 1375 mStatusList[cameraId] = oldStatus; 1376 return; 1377 } 1378 1379 if (rejectSourceStates != NULL) { 1380 const StatusVector &rejectList = *rejectSourceStates; 1381 StatusVector::const_iterator it = rejectList.begin(); 1382 1383 /** 1384 * Sometimes we want to conditionally do a transition. 1385 * For example if a client disconnects, we want to go to PRESENT 1386 * only if we weren't already in NOT_PRESENT or ENUMERATING. 1387 */ 1388 for (; it != rejectList.end(); ++it) { 1389 if (oldStatus == *it) { 1390 ALOGV("%s: Rejecting status transition for Camera ID %d, " 1391 " since the source state was was in one of the bad " 1392 " states.", __FUNCTION__, cameraId); 1393 mStatusList[cameraId] = oldStatus; 1394 return; 1395 } 1396 } 1397 } 1398 1399 /** 1400 * ProClients lose their exclusive lock. 1401 * - Done before the CameraClient can initialize the HAL device, 1402 * since we want to be able to close it before they get to initialize 1403 */ 1404 if (status == ICameraServiceListener::STATUS_NOT_AVAILABLE) { 1405 Vector<wp<ProClient> > proClients(mProClientList[cameraId]); 1406 Vector<wp<ProClient> >::const_iterator it; 1407 1408 for (it = proClients.begin(); it != proClients.end(); ++it) { 1409 sp<ProClient> proCl = it->promote(); 1410 if (proCl.get() != NULL) { 1411 proCl->onExclusiveLockStolen(); 1412 } 1413 } 1414 } 1415 1416 Vector<sp<ICameraServiceListener> >::const_iterator it; 1417 for (it = mListenerList.begin(); it != mListenerList.end(); ++it) { 1418 (*it)->onStatusChanged(status, cameraId); 1419 } 1420 } 1421} 1422 1423ICameraServiceListener::Status CameraService::getStatus(int cameraId) const { 1424 if (cameraId < 0 || cameraId >= MAX_CAMERAS) { 1425 ALOGE("%s: Invalid camera ID %d", __FUNCTION__, cameraId); 1426 return ICameraServiceListener::STATUS_UNKNOWN; 1427 } 1428 1429 Mutex::Autolock al(mStatusMutex); 1430 return mStatusList[cameraId]; 1431} 1432 1433}; // namespace android 1434