CameraService.cpp revision 98e24724fb77445d4d015a5fec4ecbd5b49abc9b
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_TAG "CameraService" 19//#define LOG_NDEBUG 0 20 21#include <stdio.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/mediaplayer.h> 36#include <utils/Errors.h> 37#include <utils/Log.h> 38#include <utils/String16.h> 39 40#include "CameraService.h" 41#include "CameraClient.h" 42#include "Camera2Client.h" 43#include "ProCamera2Client.h" 44#include "photography/CameraDeviceClient.h" 45#include "CameraDeviceFactory.h" 46 47namespace android { 48 49// ---------------------------------------------------------------------------- 50// Logging support -- this is for debugging only 51// Use "adb shell dumpsys media.camera -v 1" to change it. 52volatile int32_t gLogLevel = 0; 53 54#define LOG1(...) ALOGD_IF(gLogLevel >= 1, __VA_ARGS__); 55#define LOG2(...) ALOGD_IF(gLogLevel >= 2, __VA_ARGS__); 56 57static void setLogLevel(int level) { 58 android_atomic_write(level, &gLogLevel); 59} 60 61// ---------------------------------------------------------------------------- 62 63static int getCallingPid() { 64 return IPCThreadState::self()->getCallingPid(); 65} 66 67static int getCallingUid() { 68 return IPCThreadState::self()->getCallingUid(); 69} 70 71extern "C" { 72static void camera_device_status_change( 73 const struct camera_module_callbacks* callbacks, 74 int camera_id, 75 int new_status) { 76 sp<CameraService> cs = const_cast<CameraService*>( 77 static_cast<const CameraService*>(callbacks)); 78 79 cs->onDeviceStatusChanged( 80 camera_id, 81 new_status); 82} 83} // extern "C" 84 85// ---------------------------------------------------------------------------- 86 87// This is ugly and only safe if we never re-create the CameraService, but 88// should be ok for now. 89static CameraService *gCameraService; 90 91CameraService::CameraService() 92 :mSoundRef(0), mModule(0) 93{ 94 ALOGI("CameraService started (pid=%d)", getpid()); 95 gCameraService = this; 96 97 for (size_t i = 0; i < MAX_CAMERAS; ++i) { 98 mStatusList[i] = ICameraServiceListener::STATUS_PRESENT; 99 } 100 101 this->camera_device_status_change = android::camera_device_status_change; 102} 103 104void CameraService::onFirstRef() 105{ 106 LOG1("CameraService::onFirstRef"); 107 108 BnCameraService::onFirstRef(); 109 110 if (hw_get_module(CAMERA_HARDWARE_MODULE_ID, 111 (const hw_module_t **)&mModule) < 0) { 112 ALOGE("Could not load camera HAL module"); 113 mNumberOfCameras = 0; 114 } 115 else { 116 ALOGI("Loaded \"%s\" camera module", mModule->common.name); 117 mNumberOfCameras = mModule->get_number_of_cameras(); 118 if (mNumberOfCameras > MAX_CAMERAS) { 119 ALOGE("Number of cameras(%d) > MAX_CAMERAS(%d).", 120 mNumberOfCameras, MAX_CAMERAS); 121 mNumberOfCameras = MAX_CAMERAS; 122 } 123 for (int i = 0; i < mNumberOfCameras; i++) { 124 setCameraFree(i); 125 } 126 127 if (mModule->common.module_api_version >= 128 CAMERA_MODULE_API_VERSION_2_1) { 129 mModule->set_callbacks(this); 130 } 131 132 CameraDeviceFactory::registerService(this); 133 } 134} 135 136CameraService::~CameraService() { 137 for (int i = 0; i < mNumberOfCameras; i++) { 138 if (mBusy[i]) { 139 ALOGE("camera %d is still in use in destructor!", i); 140 } 141 } 142 143 gCameraService = NULL; 144} 145 146void CameraService::onDeviceStatusChanged(int cameraId, 147 int newStatus) 148{ 149 ALOGI("%s: Status changed for cameraId=%d, newStatus=%d", __FUNCTION__, 150 cameraId, newStatus); 151 152 if (cameraId < 0 || cameraId >= MAX_CAMERAS) { 153 ALOGE("%s: Bad camera ID %d", __FUNCTION__, cameraId); 154 return; 155 } 156 157 if ((int)getStatus(cameraId) == newStatus) { 158 ALOGE("%s: State transition to the same status 0x%x not allowed", 159 __FUNCTION__, (uint32_t)newStatus); 160 return; 161 } 162 163 /* don't do this in updateStatus 164 since it is also called from connect and we could get into a deadlock */ 165 if (newStatus == CAMERA_DEVICE_STATUS_NOT_PRESENT) { 166 Vector<sp<BasicClient> > clientsToDisconnect; 167 { 168 Mutex::Autolock al(mServiceLock); 169 170 /* Find all clients that we need to disconnect */ 171 sp<BasicClient> client = mClient[cameraId].promote(); 172 if (client.get() != NULL) { 173 clientsToDisconnect.push_back(client); 174 } 175 176 int i = cameraId; 177 for (size_t j = 0; j < mProClientList[i].size(); ++j) { 178 sp<ProClient> cl = mProClientList[i][j].promote(); 179 if (cl != NULL) { 180 clientsToDisconnect.push_back(cl); 181 } 182 } 183 } 184 185 /* now disconnect them. don't hold the lock 186 or we can get into a deadlock */ 187 188 for (size_t i = 0; i < clientsToDisconnect.size(); ++i) { 189 sp<BasicClient> client = clientsToDisconnect[i]; 190 191 client->disconnect(); 192 /** 193 * The remote app will no longer be able to call methods on the 194 * client since the client PID will be reset to 0 195 */ 196 } 197 198 ALOGV("%s: After unplug, disconnected %d clients", 199 __FUNCTION__, clientsToDisconnect.size()); 200 } 201 202 updateStatus( 203 static_cast<ICameraServiceListener::Status>(newStatus), cameraId); 204 205} 206 207int32_t CameraService::getNumberOfCameras() { 208 return mNumberOfCameras; 209} 210 211status_t CameraService::getCameraInfo(int cameraId, 212 struct CameraInfo* cameraInfo) { 213 if (!mModule) { 214 return NO_INIT; 215 } 216 217 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 218 return BAD_VALUE; 219 } 220 221 struct camera_info info; 222 status_t rc = mModule->get_camera_info(cameraId, &info); 223 cameraInfo->facing = info.facing; 224 cameraInfo->orientation = info.orientation; 225 return rc; 226} 227 228int CameraService::getDeviceVersion(int cameraId, int* facing) { 229 struct camera_info info; 230 if (mModule->get_camera_info(cameraId, &info) != OK) { 231 return -1; 232 } 233 234 int deviceVersion; 235 if (mModule->common.module_api_version >= CAMERA_MODULE_API_VERSION_2_0) { 236 deviceVersion = info.device_version; 237 } else { 238 deviceVersion = CAMERA_DEVICE_API_VERSION_1_0; 239 } 240 241 if (facing) { 242 *facing = info.facing; 243 } 244 245 return deviceVersion; 246} 247 248bool CameraService::isValidCameraId(int cameraId) { 249 int facing; 250 int deviceVersion = getDeviceVersion(cameraId, &facing); 251 252 switch(deviceVersion) { 253 case CAMERA_DEVICE_API_VERSION_1_0: 254 case CAMERA_DEVICE_API_VERSION_2_0: 255 case CAMERA_DEVICE_API_VERSION_2_1: 256 case CAMERA_DEVICE_API_VERSION_3_0: 257 return true; 258 default: 259 return false; 260 } 261 262 return false; 263} 264 265bool CameraService::validateConnect(int cameraId, 266 /*inout*/ 267 int& clientUid) const { 268 269 int callingPid = getCallingPid(); 270 271 if (clientUid == USE_CALLING_UID) { 272 clientUid = getCallingUid(); 273 } else { 274 // We only trust our own process to forward client UIDs 275 if (callingPid != getpid()) { 276 ALOGE("CameraService::connect X (pid %d) rejected (don't trust clientUid)", 277 callingPid); 278 return false; 279 } 280 } 281 282 if (!mModule) { 283 ALOGE("Camera HAL module not loaded"); 284 return false; 285 } 286 287 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 288 ALOGE("CameraService::connect X (pid %d) rejected (invalid cameraId %d).", 289 callingPid, cameraId); 290 return false; 291 } 292 293 char value[PROPERTY_VALUE_MAX]; 294 property_get("sys.secpolicy.camera.disabled", value, "0"); 295 if (strcmp(value, "1") == 0) { 296 // Camera is disabled by DevicePolicyManager. 297 ALOGI("Camera is disabled. connect X (pid %d) rejected", callingPid); 298 return false; 299 } 300 301 ICameraServiceListener::Status currentStatus = getStatus(cameraId); 302 if (currentStatus == ICameraServiceListener::STATUS_NOT_PRESENT) { 303 ALOGI("Camera is not plugged in," 304 " connect X (pid %d) rejected", callingPid); 305 return false; 306 } else if (currentStatus == ICameraServiceListener::STATUS_ENUMERATING) { 307 ALOGI("Camera is enumerating," 308 " connect X (pid %d) rejected", callingPid); 309 return false; 310 } 311 // Else don't check for STATUS_NOT_AVAILABLE. 312 // -- It's done implicitly in canConnectUnsafe /w the mBusy array 313 314 return true; 315} 316 317bool CameraService::canConnectUnsafe(int cameraId, 318 const String16& clientPackageName, 319 const sp<IBinder>& remoteCallback, 320 sp<BasicClient> &client) { 321 String8 clientName8(clientPackageName); 322 int callingPid = getCallingPid(); 323 324 if (mClient[cameraId] != 0) { 325 client = mClient[cameraId].promote(); 326 if (client != 0) { 327 if (remoteCallback == client->getRemote()) { 328 LOG1("CameraService::connect X (pid %d) (the same client)", 329 callingPid); 330 return true; 331 } else { 332 // TODOSC: need to support 1 regular client, 333 // multiple shared clients here 334 ALOGW("CameraService::connect X (pid %d) rejected" 335 " (existing client).", callingPid); 336 return false; 337 } 338 } 339 mClient[cameraId].clear(); 340 } 341 342 /* 343 mBusy is set to false as the last step of the Client destructor, 344 after which it is guaranteed that the Client destructor has finished ( 345 including any inherited destructors) 346 347 We only need this for a Client subclasses since we don't allow 348 multiple Clents to be opened concurrently, but multiple BasicClient 349 would be fine 350 */ 351 if (mBusy[cameraId]) { 352 ALOGW("CameraService::connect X (pid %d, \"%s\") rejected" 353 " (camera %d is still busy).", callingPid, 354 clientName8.string(), cameraId); 355 return false; 356 } 357 358 return true; 359} 360 361sp<ICamera> CameraService::connect( 362 const sp<ICameraClient>& cameraClient, 363 int cameraId, 364 const String16& clientPackageName, 365 int clientUid) { 366 367 String8 clientName8(clientPackageName); 368 int callingPid = getCallingPid(); 369 370 LOG1("CameraService::connect E (pid %d \"%s\", id %d)", callingPid, 371 clientName8.string(), cameraId); 372 373 if (!validateConnect(cameraId, /*inout*/clientUid)) { 374 return NULL; 375 } 376 377 378 sp<Client> client; 379 { 380 Mutex::Autolock lock(mServiceLock); 381 sp<BasicClient> clientTmp; 382 if (!canConnectUnsafe(cameraId, clientPackageName, 383 cameraClient->asBinder(), 384 /*out*/clientTmp)) { 385 return NULL; 386 } else if (client.get() != NULL) { 387 return static_cast<Client*>(clientTmp.get()); 388 } 389 390 int facing = -1; 391 int deviceVersion = getDeviceVersion(cameraId, &facing); 392 393 // If there are other non-exclusive users of the camera, 394 // this will tear them down before we can reuse the camera 395 if (isValidCameraId(cameraId)) { 396 // transition from PRESENT -> NOT_AVAILABLE 397 updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE, 398 cameraId); 399 } 400 401 switch(deviceVersion) { 402 case CAMERA_DEVICE_API_VERSION_1_0: 403 client = new CameraClient(this, cameraClient, 404 clientPackageName, cameraId, 405 facing, callingPid, clientUid, getpid()); 406 break; 407 case CAMERA_DEVICE_API_VERSION_2_0: 408 case CAMERA_DEVICE_API_VERSION_2_1: 409 case CAMERA_DEVICE_API_VERSION_3_0: 410 client = new Camera2Client(this, cameraClient, 411 clientPackageName, cameraId, 412 facing, callingPid, clientUid, getpid(), 413 deviceVersion); 414 break; 415 case -1: 416 ALOGE("Invalid camera id %d", cameraId); 417 return NULL; 418 default: 419 ALOGE("Unknown camera device HAL version: %d", deviceVersion); 420 return NULL; 421 } 422 423 if (!connectFinishUnsafe(client, 424 client->getRemote())) { 425 // this is probably not recoverable.. maybe the client can try again 426 // OK: we can only get here if we were originally in PRESENT state 427 updateStatus(ICameraServiceListener::STATUS_PRESENT, cameraId); 428 429 return NULL; 430 } 431 432 mClient[cameraId] = client; 433 LOG1("CameraService::connect X (id %d, this pid is %d)", cameraId, 434 getpid()); 435 } 436 // important: release the mutex here so the client can call back 437 // into the service from its destructor (can be at the end of the call) 438 439 return client; 440} 441 442bool CameraService::connectFinishUnsafe(const sp<BasicClient>& client, 443 const sp<IBinder>& remoteCallback) { 444 if (client->initialize(mModule) != OK) { 445 return false; 446 } 447 448 remoteCallback->linkToDeath(this); 449 450 return true; 451} 452 453sp<IProCameraUser> CameraService::connect( 454 const sp<IProCameraCallbacks>& cameraCb, 455 int cameraId, 456 const String16& clientPackageName, 457 int clientUid) 458{ 459 String8 clientName8(clientPackageName); 460 int callingPid = getCallingPid(); 461 462 LOG1("CameraService::connectPro E (pid %d \"%s\", id %d)", callingPid, 463 clientName8.string(), cameraId); 464 465 if (!validateConnect(cameraId, /*inout*/clientUid)) { 466 return NULL; 467 } 468 469 sp<ProClient> client; 470 { 471 Mutex::Autolock lock(mServiceLock); 472 { 473 sp<BasicClient> client; 474 if (!canConnectUnsafe(cameraId, clientPackageName, 475 cameraCb->asBinder(), 476 /*out*/client)) { 477 return NULL; 478 } 479 } 480 481 int facing = -1; 482 int deviceVersion = getDeviceVersion(cameraId, &facing); 483 484 switch(deviceVersion) { 485 case CAMERA_DEVICE_API_VERSION_1_0: 486 ALOGE("Camera id %d uses HALv1, doesn't support ProCamera", 487 cameraId); 488 return NULL; 489 break; 490 case CAMERA_DEVICE_API_VERSION_2_0: 491 case CAMERA_DEVICE_API_VERSION_2_1: 492 client = new ProCamera2Client(this, cameraCb, String16(), 493 cameraId, facing, callingPid, USE_CALLING_UID, getpid()); 494 break; 495 case -1: 496 ALOGE("Invalid camera id %d", cameraId); 497 return NULL; 498 default: 499 ALOGE("Unknown camera device HAL version: %d", deviceVersion); 500 return NULL; 501 } 502 503 if (!connectFinishUnsafe(client, client->getRemote())) { 504 return NULL; 505 } 506 507 mProClientList[cameraId].push(client); 508 509 LOG1("CameraService::connectPro X (id %d, this pid is %d)", cameraId, 510 getpid()); 511 } 512 // important: release the mutex here so the client can call back 513 // into the service from its destructor (can be at the end of the call) 514 515 return client; 516} 517 518sp<ICameraDeviceUser> CameraService::connect( 519 const sp<ICameraDeviceCallbacks>& cameraCb, 520 int cameraId, 521 const String16& clientPackageName, 522 int clientUid) 523{ 524 // TODO: this function needs to return status_t 525 // so that we have an error code when things go wrong and the client is NULL 526 527 String8 clientName8(clientPackageName); 528 int callingPid = getCallingPid(); 529 530 LOG1("CameraService::connectDevice E (pid %d \"%s\", id %d)", callingPid, 531 clientName8.string(), cameraId); 532 533 if (!validateConnect(cameraId, /*inout*/clientUid)) { 534 return NULL; 535 } 536 537 sp<CameraDeviceClient> client; 538 { 539 Mutex::Autolock lock(mServiceLock); 540 { 541 sp<BasicClient> client; 542 if (!canConnectUnsafe(cameraId, clientPackageName, 543 cameraCb->asBinder(), 544 /*out*/client)) { 545 return NULL; 546 } 547 } 548 549 int facing = -1; 550 int deviceVersion = getDeviceVersion(cameraId, &facing); 551 552 // If there are other non-exclusive users of the camera, 553 // this will tear them down before we can reuse the camera 554 if (isValidCameraId(cameraId)) { 555 // transition from PRESENT -> NOT_AVAILABLE 556 updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE, 557 cameraId); 558 } 559 560 switch(deviceVersion) { 561 case CAMERA_DEVICE_API_VERSION_1_0: 562 ALOGE("Camera id %d uses old HAL, doesn't support CameraDevice", 563 cameraId); 564 return NULL; 565 break; 566 // TODO: don't allow 2.0 Only allow 2.1 and higher 567 case CAMERA_DEVICE_API_VERSION_2_0: 568 case CAMERA_DEVICE_API_VERSION_2_1: 569 case CAMERA_DEVICE_API_VERSION_3_0: 570 client = new CameraDeviceClient(this, cameraCb, String16(), 571 cameraId, facing, callingPid, USE_CALLING_UID, getpid()); 572 break; 573 case -1: 574 ALOGE("Invalid camera id %d", cameraId); 575 return NULL; 576 default: 577 ALOGE("Unknown camera device HAL version: %d", deviceVersion); 578 return NULL; 579 } 580 581 if (!connectFinishUnsafe(client, client->getRemote())) { 582 // this is probably not recoverable.. maybe the client can try again 583 // OK: we can only get here if we were originally in PRESENT state 584 updateStatus(ICameraServiceListener::STATUS_PRESENT, cameraId); 585 return NULL; 586 } 587 588 LOG1("CameraService::connectDevice X (id %d, this pid is %d)", cameraId, 589 getpid()); 590 591 mClient[cameraId] = client; 592 } 593 // important: release the mutex here so the client can call back 594 // into the service from its destructor (can be at the end of the call) 595 596 return client; 597} 598 599 600status_t CameraService::addListener( 601 const sp<ICameraServiceListener>& listener) { 602 ALOGV("%s: Add listener %p", __FUNCTION__, listener.get()); 603 604 Mutex::Autolock lock(mServiceLock); 605 606 Vector<sp<ICameraServiceListener> >::iterator it, end; 607 for (it = mListenerList.begin(); it != mListenerList.end(); ++it) { 608 if ((*it)->asBinder() == listener->asBinder()) { 609 ALOGW("%s: Tried to add listener %p which was already subscribed", 610 __FUNCTION__, listener.get()); 611 return ALREADY_EXISTS; 612 } 613 } 614 615 mListenerList.push_back(listener); 616 617 /* Immediately signal current status to this listener only */ 618 { 619 Mutex::Autolock m(mStatusMutex) ; 620 int numCams = getNumberOfCameras(); 621 for (int i = 0; i < numCams; ++i) { 622 listener->onStatusChanged(mStatusList[i], i); 623 } 624 } 625 626 return OK; 627} 628status_t CameraService::removeListener( 629 const sp<ICameraServiceListener>& listener) { 630 ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get()); 631 632 Mutex::Autolock lock(mServiceLock); 633 634 Vector<sp<ICameraServiceListener> >::iterator it; 635 for (it = mListenerList.begin(); it != mListenerList.end(); ++it) { 636 if ((*it)->asBinder() == listener->asBinder()) { 637 mListenerList.erase(it); 638 return OK; 639 } 640 } 641 642 ALOGW("%s: Tried to remove a listener %p which was not subscribed", 643 __FUNCTION__, listener.get()); 644 645 return BAD_VALUE; 646} 647 648void CameraService::removeClientByRemote(const wp<IBinder>& remoteBinder) { 649 int callingPid = getCallingPid(); 650 LOG1("CameraService::removeClientByRemote E (pid %d)", callingPid); 651 652 // Declare this before the lock to make absolutely sure the 653 // destructor won't be called with the lock held. 654 Mutex::Autolock lock(mServiceLock); 655 656 int outIndex; 657 sp<BasicClient> client = findClientUnsafe(remoteBinder, outIndex); 658 659 if (client != 0) { 660 // Found our camera, clear and leave. 661 LOG1("removeClient: clear camera %d", outIndex); 662 mClient[outIndex].clear(); 663 664 client->getRemote()->unlinkToDeath(this); 665 } else { 666 667 sp<ProClient> clientPro = findProClientUnsafe(remoteBinder); 668 669 if (clientPro != NULL) { 670 // Found our camera, clear and leave. 671 LOG1("removeClient: clear pro %p", clientPro.get()); 672 673 clientPro->getRemoteCallback()->asBinder()->unlinkToDeath(this); 674 } 675 } 676 677 LOG1("CameraService::removeClientByRemote X (pid %d)", callingPid); 678} 679 680sp<CameraService::ProClient> CameraService::findProClientUnsafe( 681 const wp<IBinder>& cameraCallbacksRemote) 682{ 683 sp<ProClient> clientPro; 684 685 for (int i = 0; i < mNumberOfCameras; ++i) { 686 Vector<size_t> removeIdx; 687 688 for (size_t j = 0; j < mProClientList[i].size(); ++j) { 689 wp<ProClient> cl = mProClientList[i][j]; 690 691 sp<ProClient> clStrong = cl.promote(); 692 if (clStrong != NULL && clStrong->getRemote() == cameraCallbacksRemote) { 693 clientPro = clStrong; 694 break; 695 } else if (clStrong == NULL) { 696 // mark to clean up dead ptr 697 removeIdx.push(j); 698 } 699 } 700 701 // remove stale ptrs (in reverse so the indices dont change) 702 for (ssize_t j = (ssize_t)removeIdx.size() - 1; j >= 0; --j) { 703 mProClientList[i].removeAt(removeIdx[j]); 704 } 705 706 } 707 708 return clientPro; 709} 710 711sp<CameraService::BasicClient> CameraService::findClientUnsafe( 712 const wp<IBinder>& cameraClient, int& outIndex) { 713 sp<BasicClient> client; 714 715 for (int i = 0; i < mNumberOfCameras; i++) { 716 717 // This happens when we have already disconnected (or this is 718 // just another unused camera). 719 if (mClient[i] == 0) continue; 720 721 // Promote mClient. It can fail if we are called from this path: 722 // Client::~Client() -> disconnect() -> removeClientByRemote(). 723 client = mClient[i].promote(); 724 725 // Clean up stale client entry 726 if (client == NULL) { 727 mClient[i].clear(); 728 continue; 729 } 730 731 if (cameraClient == client->getRemote()) { 732 // Found our camera 733 outIndex = i; 734 return client; 735 } 736 } 737 738 outIndex = -1; 739 return NULL; 740} 741 742CameraService::BasicClient* CameraService::getClientByIdUnsafe(int cameraId) { 743 if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL; 744 return mClient[cameraId].unsafe_get(); 745} 746 747Mutex* CameraService::getClientLockById(int cameraId) { 748 if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL; 749 return &mClientLock[cameraId]; 750} 751 752sp<CameraService::BasicClient> CameraService::getClientByRemote( 753 const wp<IBinder>& cameraClient) { 754 755 // Declare this before the lock to make absolutely sure the 756 // destructor won't be called with the lock held. 757 sp<BasicClient> client; 758 759 Mutex::Autolock lock(mServiceLock); 760 761 int outIndex; 762 client = findClientUnsafe(cameraClient, outIndex); 763 764 return client; 765} 766 767status_t CameraService::onTransact( 768 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) { 769 // Permission checks 770 switch (code) { 771 case BnCameraService::CONNECT: 772 case BnCameraService::CONNECT_PRO: 773 const int pid = getCallingPid(); 774 const int self_pid = getpid(); 775 if (pid != self_pid) { 776 // we're called from a different process, do the real check 777 if (!checkCallingPermission( 778 String16("android.permission.CAMERA"))) { 779 const int uid = getCallingUid(); 780 ALOGE("Permission Denial: " 781 "can't use the camera pid=%d, uid=%d", pid, uid); 782 return PERMISSION_DENIED; 783 } 784 } 785 break; 786 } 787 788 return BnCameraService::onTransact(code, data, reply, flags); 789} 790 791// The reason we need this busy bit is a new CameraService::connect() request 792// may come in while the previous Client's destructor has not been run or is 793// still running. If the last strong reference of the previous Client is gone 794// but the destructor has not been finished, we should not allow the new Client 795// to be created because we need to wait for the previous Client to tear down 796// the hardware first. 797void CameraService::setCameraBusy(int cameraId) { 798 android_atomic_write(1, &mBusy[cameraId]); 799 800 ALOGV("setCameraBusy cameraId=%d", cameraId); 801} 802 803void CameraService::setCameraFree(int cameraId) { 804 android_atomic_write(0, &mBusy[cameraId]); 805 806 ALOGV("setCameraFree cameraId=%d", cameraId); 807} 808 809// We share the media players for shutter and recording sound for all clients. 810// A reference count is kept to determine when we will actually release the 811// media players. 812 813MediaPlayer* CameraService::newMediaPlayer(const char *file) { 814 MediaPlayer* mp = new MediaPlayer(); 815 if (mp->setDataSource(file, NULL) == NO_ERROR) { 816 mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE); 817 mp->prepare(); 818 } else { 819 ALOGE("Failed to load CameraService sounds: %s", file); 820 return NULL; 821 } 822 return mp; 823} 824 825void CameraService::loadSound() { 826 Mutex::Autolock lock(mSoundLock); 827 LOG1("CameraService::loadSound ref=%d", mSoundRef); 828 if (mSoundRef++) return; 829 830 mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg"); 831 mSoundPlayer[SOUND_RECORDING] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg"); 832} 833 834void CameraService::releaseSound() { 835 Mutex::Autolock lock(mSoundLock); 836 LOG1("CameraService::releaseSound ref=%d", mSoundRef); 837 if (--mSoundRef) return; 838 839 for (int i = 0; i < NUM_SOUNDS; i++) { 840 if (mSoundPlayer[i] != 0) { 841 mSoundPlayer[i]->disconnect(); 842 mSoundPlayer[i].clear(); 843 } 844 } 845} 846 847void CameraService::playSound(sound_kind kind) { 848 LOG1("playSound(%d)", kind); 849 Mutex::Autolock lock(mSoundLock); 850 sp<MediaPlayer> player = mSoundPlayer[kind]; 851 if (player != 0) { 852 player->seekTo(0); 853 player->start(); 854 } 855} 856 857// ---------------------------------------------------------------------------- 858 859CameraService::Client::Client(const sp<CameraService>& cameraService, 860 const sp<ICameraClient>& cameraClient, 861 const String16& clientPackageName, 862 int cameraId, int cameraFacing, 863 int clientPid, uid_t clientUid, 864 int servicePid) : 865 CameraService::BasicClient(cameraService, cameraClient->asBinder(), 866 clientPackageName, 867 cameraId, cameraFacing, 868 clientPid, clientUid, 869 servicePid) 870{ 871 int callingPid = getCallingPid(); 872 LOG1("Client::Client E (pid %d, id %d)", callingPid, cameraId); 873 874 mRemoteCallback = cameraClient; 875 876 cameraService->setCameraBusy(cameraId); 877 cameraService->loadSound(); 878 879 LOG1("Client::Client X (pid %d, id %d)", callingPid, cameraId); 880} 881 882// tear down the client 883CameraService::Client::~Client() { 884 ALOGV("~Client"); 885 mDestructionStarted = true; 886 887 mCameraService->releaseSound(); 888 // unconditionally disconnect. function is idempotent 889 Client::disconnect(); 890} 891 892CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService, 893 const sp<IBinder>& remoteCallback, 894 const String16& clientPackageName, 895 int cameraId, int cameraFacing, 896 int clientPid, uid_t clientUid, 897 int servicePid): 898 mClientPackageName(clientPackageName) 899{ 900 mCameraService = cameraService; 901 mRemoteBinder = remoteCallback; 902 mCameraId = cameraId; 903 mCameraFacing = cameraFacing; 904 mClientPid = clientPid; 905 mClientUid = clientUid; 906 mServicePid = servicePid; 907 mOpsActive = false; 908 mDestructionStarted = false; 909} 910 911CameraService::BasicClient::~BasicClient() { 912 ALOGV("~BasicClient"); 913 mDestructionStarted = true; 914} 915 916void CameraService::BasicClient::disconnect() { 917 ALOGV("BasicClient::disconnect"); 918 mCameraService->removeClientByRemote(mRemoteBinder); 919 // client shouldn't be able to call into us anymore 920 mClientPid = 0; 921} 922 923status_t CameraService::BasicClient::startCameraOps() { 924 int32_t res; 925 926 mOpsCallback = new OpsCallback(this); 927 928 { 929 ALOGV("%s: Start camera ops, package name = %s, client UID = %d", 930 __FUNCTION__, String8(mClientPackageName).string(), mClientUid); 931 } 932 933 mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA, 934 mClientPackageName, mOpsCallback); 935 res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA, 936 mClientUid, mClientPackageName); 937 938 if (res != AppOpsManager::MODE_ALLOWED) { 939 ALOGI("Camera %d: Access for \"%s\" has been revoked", 940 mCameraId, String8(mClientPackageName).string()); 941 return PERMISSION_DENIED; 942 } 943 mOpsActive = true; 944 return OK; 945} 946 947status_t CameraService::BasicClient::finishCameraOps() { 948 if (mOpsActive) { 949 mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid, 950 mClientPackageName); 951 mOpsActive = false; 952 } 953 mAppOpsManager.stopWatchingMode(mOpsCallback); 954 mOpsCallback.clear(); 955 956 return OK; 957} 958 959void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) { 960 String8 name(packageName); 961 String8 myName(mClientPackageName); 962 963 if (op != AppOpsManager::OP_CAMERA) { 964 ALOGW("Unexpected app ops notification received: %d", op); 965 return; 966 } 967 968 int32_t res; 969 res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA, 970 mClientUid, mClientPackageName); 971 ALOGV("checkOp returns: %d, %s ", res, 972 res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" : 973 res == AppOpsManager::MODE_IGNORED ? "IGNORED" : 974 res == AppOpsManager::MODE_ERRORED ? "ERRORED" : 975 "UNKNOWN"); 976 977 if (res != AppOpsManager::MODE_ALLOWED) { 978 ALOGI("Camera %d: Access for \"%s\" revoked", mCameraId, 979 myName.string()); 980 // Reset the client PID to allow server-initiated disconnect, 981 // and to prevent further calls by client. 982 mClientPid = getCallingPid(); 983 notifyError(); 984 disconnect(); 985 } 986} 987 988// ---------------------------------------------------------------------------- 989 990Mutex* CameraService::Client::getClientLockFromCookie(void* user) { 991 return gCameraService->getClientLockById((int) user); 992} 993 994// Provide client pointer for callbacks. Client lock returned from getClientLockFromCookie should 995// be acquired for this to be safe 996CameraService::Client* CameraService::Client::getClientFromCookie(void* user) { 997 BasicClient *basicClient = gCameraService->getClientByIdUnsafe((int) user); 998 // OK: only CameraClient calls this, and they already cast anyway. 999 Client* client = static_cast<Client*>(basicClient); 1000 1001 // This could happen if the Client is in the process of shutting down (the 1002 // last strong reference is gone, but the destructor hasn't finished 1003 // stopping the hardware). 1004 if (client == NULL) return NULL; 1005 1006 // destruction already started, so should not be accessed 1007 if (client->mDestructionStarted) return NULL; 1008 1009 return client; 1010} 1011 1012void CameraService::Client::notifyError() { 1013 mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0); 1014} 1015 1016// NOTE: function is idempotent 1017void CameraService::Client::disconnect() { 1018 ALOGV("Client::disconnect"); 1019 BasicClient::disconnect(); 1020 mCameraService->setCameraFree(mCameraId); 1021 1022 StatusVector rejectSourceStates; 1023 rejectSourceStates.push_back(ICameraServiceListener::STATUS_NOT_PRESENT); 1024 rejectSourceStates.push_back(ICameraServiceListener::STATUS_ENUMERATING); 1025 1026 // Transition to PRESENT if the camera is not in either of above 2 states 1027 mCameraService->updateStatus(ICameraServiceListener::STATUS_PRESENT, 1028 mCameraId, 1029 &rejectSourceStates); 1030} 1031 1032CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client): 1033 mClient(client) { 1034} 1035 1036void CameraService::Client::OpsCallback::opChanged(int32_t op, 1037 const String16& packageName) { 1038 sp<BasicClient> client = mClient.promote(); 1039 if (client != NULL) { 1040 client->opChanged(op, packageName); 1041 } 1042} 1043 1044// ---------------------------------------------------------------------------- 1045// IProCamera 1046// ---------------------------------------------------------------------------- 1047 1048CameraService::ProClient::ProClient(const sp<CameraService>& cameraService, 1049 const sp<IProCameraCallbacks>& remoteCallback, 1050 const String16& clientPackageName, 1051 int cameraId, 1052 int cameraFacing, 1053 int clientPid, 1054 uid_t clientUid, 1055 int servicePid) 1056 : CameraService::BasicClient(cameraService, remoteCallback->asBinder(), 1057 clientPackageName, cameraId, cameraFacing, 1058 clientPid, clientUid, servicePid) 1059{ 1060 mRemoteCallback = remoteCallback; 1061} 1062 1063CameraService::ProClient::~ProClient() { 1064} 1065 1066void CameraService::ProClient::notifyError() { 1067 mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0); 1068} 1069 1070// ---------------------------------------------------------------------------- 1071 1072static const int kDumpLockRetries = 50; 1073static const int kDumpLockSleep = 60000; 1074 1075static bool tryLock(Mutex& mutex) 1076{ 1077 bool locked = false; 1078 for (int i = 0; i < kDumpLockRetries; ++i) { 1079 if (mutex.tryLock() == NO_ERROR) { 1080 locked = true; 1081 break; 1082 } 1083 usleep(kDumpLockSleep); 1084 } 1085 return locked; 1086} 1087 1088status_t CameraService::dump(int fd, const Vector<String16>& args) { 1089 String8 result; 1090 if (checkCallingPermission(String16("android.permission.DUMP")) == false) { 1091 result.appendFormat("Permission Denial: " 1092 "can't dump CameraService from pid=%d, uid=%d\n", 1093 getCallingPid(), 1094 getCallingUid()); 1095 write(fd, result.string(), result.size()); 1096 } else { 1097 bool locked = tryLock(mServiceLock); 1098 // failed to lock - CameraService is probably deadlocked 1099 if (!locked) { 1100 result.append("CameraService may be deadlocked\n"); 1101 write(fd, result.string(), result.size()); 1102 } 1103 1104 bool hasClient = false; 1105 if (!mModule) { 1106 result = String8::format("No camera module available!\n"); 1107 write(fd, result.string(), result.size()); 1108 return NO_ERROR; 1109 } 1110 1111 result = String8::format("Camera module HAL API version: 0x%x\n", 1112 mModule->common.hal_api_version); 1113 result.appendFormat("Camera module API version: 0x%x\n", 1114 mModule->common.module_api_version); 1115 result.appendFormat("Camera module name: %s\n", 1116 mModule->common.name); 1117 result.appendFormat("Camera module author: %s\n", 1118 mModule->common.author); 1119 result.appendFormat("Number of camera devices: %d\n\n", mNumberOfCameras); 1120 write(fd, result.string(), result.size()); 1121 for (int i = 0; i < mNumberOfCameras; i++) { 1122 result = String8::format("Camera %d static information:\n", i); 1123 camera_info info; 1124 1125 status_t rc = mModule->get_camera_info(i, &info); 1126 if (rc != OK) { 1127 result.appendFormat(" Error reading static information!\n"); 1128 write(fd, result.string(), result.size()); 1129 } else { 1130 result.appendFormat(" Facing: %s\n", 1131 info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT"); 1132 result.appendFormat(" Orientation: %d\n", info.orientation); 1133 int deviceVersion; 1134 if (mModule->common.module_api_version < 1135 CAMERA_MODULE_API_VERSION_2_0) { 1136 deviceVersion = CAMERA_DEVICE_API_VERSION_1_0; 1137 } else { 1138 deviceVersion = info.device_version; 1139 } 1140 result.appendFormat(" Device version: 0x%x\n", deviceVersion); 1141 if (deviceVersion >= CAMERA_DEVICE_API_VERSION_2_0) { 1142 result.appendFormat(" Device static metadata:\n"); 1143 write(fd, result.string(), result.size()); 1144 dump_indented_camera_metadata(info.static_camera_characteristics, 1145 fd, 2, 4); 1146 } else { 1147 write(fd, result.string(), result.size()); 1148 } 1149 } 1150 1151 sp<BasicClient> client = mClient[i].promote(); 1152 if (client == 0) { 1153 result = String8::format(" Device is closed, no client instance\n"); 1154 write(fd, result.string(), result.size()); 1155 continue; 1156 } 1157 hasClient = true; 1158 result = String8::format(" Device is open. Client instance dump:\n"); 1159 write(fd, result.string(), result.size()); 1160 client->dump(fd, args); 1161 } 1162 if (!hasClient) { 1163 result = String8::format("\nNo active camera clients yet.\n"); 1164 write(fd, result.string(), result.size()); 1165 } 1166 1167 if (locked) mServiceLock.unlock(); 1168 1169 // change logging level 1170 int n = args.size(); 1171 for (int i = 0; i + 1 < n; i++) { 1172 String16 verboseOption("-v"); 1173 if (args[i] == verboseOption) { 1174 String8 levelStr(args[i+1]); 1175 int level = atoi(levelStr.string()); 1176 result = String8::format("\nSetting log level to %d.\n", level); 1177 setLogLevel(level); 1178 write(fd, result.string(), result.size()); 1179 } 1180 } 1181 1182 } 1183 return NO_ERROR; 1184} 1185 1186/*virtual*/void CameraService::binderDied( 1187 const wp<IBinder> &who) { 1188 1189 /** 1190 * While tempting to promote the wp<IBinder> into a sp, 1191 * it's actually not supported by the binder driver 1192 */ 1193 1194 ALOGV("java clients' binder died"); 1195 1196 sp<BasicClient> cameraClient = getClientByRemote(who); 1197 1198 if (cameraClient == 0) { 1199 ALOGV("java clients' binder death already cleaned up (normal case)"); 1200 return; 1201 } 1202 1203 ALOGW("Disconnecting camera client %p since the binder for it " 1204 "died (this pid %d)", cameraClient.get(), getCallingPid()); 1205 1206 cameraClient->disconnect(); 1207 1208} 1209 1210void CameraService::updateStatus(ICameraServiceListener::Status status, 1211 int32_t cameraId, 1212 const StatusVector *rejectSourceStates) { 1213 // do not lock mServiceLock here or can get into a deadlock from 1214 // connect() -> ProClient::disconnect -> updateStatus 1215 Mutex::Autolock lock(mStatusMutex); 1216 1217 ICameraServiceListener::Status oldStatus = mStatusList[cameraId]; 1218 1219 mStatusList[cameraId] = status; 1220 1221 if (oldStatus != status) { 1222 ALOGV("%s: Status has changed for camera ID %d from 0x%x to 0x%x", 1223 __FUNCTION__, cameraId, (uint32_t)oldStatus, (uint32_t)status); 1224 1225 if (oldStatus == ICameraServiceListener::STATUS_NOT_PRESENT && 1226 (status != ICameraServiceListener::STATUS_PRESENT && 1227 status != ICameraServiceListener::STATUS_ENUMERATING)) { 1228 1229 ALOGW("%s: From NOT_PRESENT can only transition into PRESENT" 1230 " or ENUMERATING", __FUNCTION__); 1231 mStatusList[cameraId] = oldStatus; 1232 return; 1233 } 1234 1235 if (rejectSourceStates != NULL) { 1236 const StatusVector &rejectList = *rejectSourceStates; 1237 StatusVector::const_iterator it = rejectList.begin(); 1238 1239 /** 1240 * Sometimes we want to conditionally do a transition. 1241 * For example if a client disconnects, we want to go to PRESENT 1242 * only if we weren't already in NOT_PRESENT or ENUMERATING. 1243 */ 1244 for (; it != rejectList.end(); ++it) { 1245 if (oldStatus == *it) { 1246 ALOGV("%s: Rejecting status transition for Camera ID %d, " 1247 " since the source state was was in one of the bad " 1248 " states.", __FUNCTION__, cameraId); 1249 mStatusList[cameraId] = oldStatus; 1250 return; 1251 } 1252 } 1253 } 1254 1255 /** 1256 * ProClients lose their exclusive lock. 1257 * - Done before the CameraClient can initialize the HAL device, 1258 * since we want to be able to close it before they get to initialize 1259 */ 1260 if (status == ICameraServiceListener::STATUS_NOT_AVAILABLE) { 1261 Vector<wp<ProClient> > proClients(mProClientList[cameraId]); 1262 Vector<wp<ProClient> >::const_iterator it; 1263 1264 for (it = proClients.begin(); it != proClients.end(); ++it) { 1265 sp<ProClient> proCl = it->promote(); 1266 if (proCl.get() != NULL) { 1267 proCl->onExclusiveLockStolen(); 1268 } 1269 } 1270 } 1271 1272 Vector<sp<ICameraServiceListener> >::const_iterator it; 1273 for (it = mListenerList.begin(); it != mListenerList.end(); ++it) { 1274 (*it)->onStatusChanged(status, cameraId); 1275 } 1276 } 1277} 1278 1279ICameraServiceListener::Status CameraService::getStatus(int cameraId) const { 1280 if (cameraId < 0 || cameraId >= MAX_CAMERAS) { 1281 ALOGE("%s: Invalid camera ID %d", __FUNCTION__, cameraId); 1282 return ICameraServiceListener::STATUS_UNKNOWN; 1283 } 1284 1285 Mutex::Autolock al(mStatusMutex); 1286 return mStatusList[cameraId]; 1287} 1288 1289}; // namespace android 1290