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 #include <system/camera_metadata.h> 43 #include <system/camera.h> 44 45 #include "CameraService.h" 46 #include "api1/CameraClient.h" 47 #include "api1/Camera2Client.h" 48 #include "api_pro/ProCamera2Client.h" 49 #include "api2/CameraDeviceClient.h" 50 #include "utils/CameraTraces.h" 51 #include "CameraDeviceFactory.h" 52 53 namespace android { 54 55 // ---------------------------------------------------------------------------- 56 // Logging support -- this is for debugging only 57 // Use "adb shell dumpsys media.camera -v 1" to change it. 58 volatile int32_t gLogLevel = 0; 59 60 #define LOG1(...) ALOGD_IF(gLogLevel >= 1, __VA_ARGS__); 61 #define LOG2(...) ALOGD_IF(gLogLevel >= 2, __VA_ARGS__); 62 63 static void setLogLevel(int level) { 64 android_atomic_write(level, &gLogLevel); 65 } 66 67 // ---------------------------------------------------------------------------- 68 69 static int getCallingPid() { 70 return IPCThreadState::self()->getCallingPid(); 71 } 72 73 static int getCallingUid() { 74 return IPCThreadState::self()->getCallingUid(); 75 } 76 77 extern "C" { 78 static void camera_device_status_change( 79 const struct camera_module_callbacks* callbacks, 80 int camera_id, 81 int new_status) { 82 sp<CameraService> cs = const_cast<CameraService*>( 83 static_cast<const CameraService*>(callbacks)); 84 85 cs->onDeviceStatusChanged( 86 camera_id, 87 new_status); 88 } 89 } // extern "C" 90 91 // ---------------------------------------------------------------------------- 92 93 // This is ugly and only safe if we never re-create the CameraService, but 94 // should be ok for now. 95 static CameraService *gCameraService; 96 97 CameraService::CameraService() 98 :mSoundRef(0), mModule(0) 99 { 100 ALOGI("CameraService started (pid=%d)", getpid()); 101 gCameraService = this; 102 103 for (size_t i = 0; i < MAX_CAMERAS; ++i) { 104 mStatusList[i] = ICameraServiceListener::STATUS_PRESENT; 105 } 106 107 this->camera_device_status_change = android::camera_device_status_change; 108 } 109 110 void CameraService::onFirstRef() 111 { 112 LOG1("CameraService::onFirstRef"); 113 114 BnCameraService::onFirstRef(); 115 116 if (hw_get_module(CAMERA_HARDWARE_MODULE_ID, 117 (const hw_module_t **)&mModule) < 0) { 118 ALOGE("Could not load camera HAL module"); 119 mNumberOfCameras = 0; 120 } 121 else { 122 ALOGI("Loaded \"%s\" camera module", mModule->common.name); 123 mNumberOfCameras = mModule->get_number_of_cameras(); 124 if (mNumberOfCameras > MAX_CAMERAS) { 125 ALOGE("Number of cameras(%d) > MAX_CAMERAS(%d).", 126 mNumberOfCameras, MAX_CAMERAS); 127 mNumberOfCameras = MAX_CAMERAS; 128 } 129 for (int i = 0; i < mNumberOfCameras; i++) { 130 setCameraFree(i); 131 } 132 133 if (mModule->common.module_api_version >= 134 CAMERA_MODULE_API_VERSION_2_1) { 135 mModule->set_callbacks(this); 136 } 137 138 VendorTagDescriptor::clearGlobalVendorTagDescriptor(); 139 140 if (mModule->common.module_api_version >= CAMERA_MODULE_API_VERSION_2_2) { 141 setUpVendorTags(); 142 } 143 144 CameraDeviceFactory::registerService(this); 145 } 146 } 147 148 CameraService::~CameraService() { 149 for (int i = 0; i < mNumberOfCameras; i++) { 150 if (mBusy[i]) { 151 ALOGE("camera %d is still in use in destructor!", i); 152 } 153 } 154 155 VendorTagDescriptor::clearGlobalVendorTagDescriptor(); 156 gCameraService = NULL; 157 } 158 159 void CameraService::onDeviceStatusChanged(int cameraId, 160 int newStatus) 161 { 162 ALOGI("%s: Status changed for cameraId=%d, newStatus=%d", __FUNCTION__, 163 cameraId, newStatus); 164 165 if (cameraId < 0 || cameraId >= MAX_CAMERAS) { 166 ALOGE("%s: Bad camera ID %d", __FUNCTION__, cameraId); 167 return; 168 } 169 170 if ((int)getStatus(cameraId) == newStatus) { 171 ALOGE("%s: State transition to the same status 0x%x not allowed", 172 __FUNCTION__, (uint32_t)newStatus); 173 return; 174 } 175 176 /* don't do this in updateStatus 177 since it is also called from connect and we could get into a deadlock */ 178 if (newStatus == CAMERA_DEVICE_STATUS_NOT_PRESENT) { 179 Vector<sp<BasicClient> > clientsToDisconnect; 180 { 181 Mutex::Autolock al(mServiceLock); 182 183 /* Remove cached parameters from shim cache */ 184 mShimParams.removeItem(cameraId); 185 186 /* Find all clients that we need to disconnect */ 187 sp<BasicClient> client = mClient[cameraId].promote(); 188 if (client.get() != NULL) { 189 clientsToDisconnect.push_back(client); 190 } 191 192 int i = cameraId; 193 for (size_t j = 0; j < mProClientList[i].size(); ++j) { 194 sp<ProClient> cl = mProClientList[i][j].promote(); 195 if (cl != NULL) { 196 clientsToDisconnect.push_back(cl); 197 } 198 } 199 } 200 201 /* now disconnect them. don't hold the lock 202 or we can get into a deadlock */ 203 204 for (size_t i = 0; i < clientsToDisconnect.size(); ++i) { 205 sp<BasicClient> client = clientsToDisconnect[i]; 206 207 client->disconnect(); 208 /** 209 * The remote app will no longer be able to call methods on the 210 * client since the client PID will be reset to 0 211 */ 212 } 213 214 ALOGV("%s: After unplug, disconnected %zu clients", 215 __FUNCTION__, clientsToDisconnect.size()); 216 } 217 218 updateStatus( 219 static_cast<ICameraServiceListener::Status>(newStatus), cameraId); 220 221 } 222 223 int32_t CameraService::getNumberOfCameras() { 224 return mNumberOfCameras; 225 } 226 227 status_t CameraService::getCameraInfo(int cameraId, 228 struct CameraInfo* cameraInfo) { 229 if (!mModule) { 230 return -ENODEV; 231 } 232 233 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 234 return BAD_VALUE; 235 } 236 237 struct camera_info info; 238 status_t rc = filterGetInfoErrorCode( 239 mModule->get_camera_info(cameraId, &info)); 240 cameraInfo->facing = info.facing; 241 cameraInfo->orientation = info.orientation; 242 return rc; 243 } 244 245 246 status_t CameraService::generateShimMetadata(int cameraId, /*out*/CameraMetadata* cameraInfo) { 247 status_t ret = OK; 248 struct CameraInfo info; 249 if ((ret = getCameraInfo(cameraId, &info)) != OK) { 250 return ret; 251 } 252 253 CameraMetadata shimInfo; 254 int32_t orientation = static_cast<int32_t>(info.orientation); 255 if ((ret = shimInfo.update(ANDROID_SENSOR_ORIENTATION, &orientation, 1)) != OK) { 256 return ret; 257 } 258 259 uint8_t facing = (info.facing == CAMERA_FACING_FRONT) ? 260 ANDROID_LENS_FACING_FRONT : ANDROID_LENS_FACING_BACK; 261 if ((ret = shimInfo.update(ANDROID_LENS_FACING, &facing, 1)) != OK) { 262 return ret; 263 } 264 265 CameraParameters shimParams; 266 if ((ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)) != OK) { 267 // Error logged by callee 268 return ret; 269 } 270 271 Vector<Size> sizes; 272 Vector<Size> jpegSizes; 273 Vector<int32_t> formats; 274 const char* supportedPreviewFormats; 275 { 276 shimParams.getSupportedPreviewSizes(/*out*/sizes); 277 shimParams.getSupportedPreviewFormats(/*out*/formats); 278 shimParams.getSupportedPictureSizes(/*out*/jpegSizes); 279 } 280 281 // Always include IMPLEMENTATION_DEFINED 282 formats.add(HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED); 283 284 const size_t INTS_PER_CONFIG = 4; 285 286 // Build available stream configurations metadata 287 size_t streamConfigSize = (sizes.size() * formats.size() + jpegSizes.size()) * INTS_PER_CONFIG; 288 289 Vector<int32_t> streamConfigs; 290 streamConfigs.setCapacity(streamConfigSize); 291 292 for (size_t i = 0; i < formats.size(); ++i) { 293 for (size_t j = 0; j < sizes.size(); ++j) { 294 streamConfigs.add(formats[i]); 295 streamConfigs.add(sizes[j].width); 296 streamConfigs.add(sizes[j].height); 297 streamConfigs.add(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT); 298 } 299 } 300 301 for (size_t i = 0; i < jpegSizes.size(); ++i) { 302 streamConfigs.add(HAL_PIXEL_FORMAT_BLOB); 303 streamConfigs.add(jpegSizes[i].width); 304 streamConfigs.add(jpegSizes[i].height); 305 streamConfigs.add(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS_OUTPUT); 306 } 307 308 if ((ret = shimInfo.update(ANDROID_SCALER_AVAILABLE_STREAM_CONFIGURATIONS, 309 streamConfigs.array(), streamConfigSize)) != OK) { 310 return ret; 311 } 312 313 int64_t fakeMinFrames[0]; 314 // TODO: Fixme, don't fake min frame durations. 315 if ((ret = shimInfo.update(ANDROID_SCALER_AVAILABLE_MIN_FRAME_DURATIONS, 316 fakeMinFrames, 0)) != OK) { 317 return ret; 318 } 319 320 int64_t fakeStalls[0]; 321 // TODO: Fixme, don't fake stall durations. 322 if ((ret = shimInfo.update(ANDROID_SCALER_AVAILABLE_STALL_DURATIONS, 323 fakeStalls, 0)) != OK) { 324 return ret; 325 } 326 327 *cameraInfo = shimInfo; 328 return OK; 329 } 330 331 status_t CameraService::getCameraCharacteristics(int cameraId, 332 CameraMetadata* cameraInfo) { 333 if (!cameraInfo) { 334 ALOGE("%s: cameraInfo is NULL", __FUNCTION__); 335 return BAD_VALUE; 336 } 337 338 if (!mModule) { 339 ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__); 340 return -ENODEV; 341 } 342 343 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 344 ALOGE("%s: Invalid camera id: %d", __FUNCTION__, cameraId); 345 return BAD_VALUE; 346 } 347 348 int facing; 349 status_t ret = OK; 350 if (mModule->common.module_api_version < CAMERA_MODULE_API_VERSION_2_0 || 351 getDeviceVersion(cameraId, &facing) <= CAMERA_DEVICE_API_VERSION_2_1 ) { 352 /** 353 * Backwards compatibility mode for old HALs: 354 * - Convert CameraInfo into static CameraMetadata properties. 355 * - Retrieve cached CameraParameters for this camera. If none exist, 356 * attempt to open CameraClient and retrieve the CameraParameters. 357 * - Convert cached CameraParameters into static CameraMetadata 358 * properties. 359 */ 360 ALOGI("%s: Switching to HAL1 shim implementation...", __FUNCTION__); 361 362 if ((ret = generateShimMetadata(cameraId, cameraInfo)) != OK) { 363 return ret; 364 } 365 366 } else { 367 /** 368 * Normal HAL 2.1+ codepath. 369 */ 370 struct camera_info info; 371 ret = filterGetInfoErrorCode(mModule->get_camera_info(cameraId, &info)); 372 *cameraInfo = info.static_camera_characteristics; 373 } 374 375 return ret; 376 } 377 378 status_t CameraService::getCameraVendorTagDescriptor(/*out*/sp<VendorTagDescriptor>& desc) { 379 if (!mModule) { 380 ALOGE("%s: camera hardware module doesn't exist", __FUNCTION__); 381 return -ENODEV; 382 } 383 384 desc = VendorTagDescriptor::getGlobalVendorTagDescriptor(); 385 return OK; 386 } 387 388 int CameraService::getDeviceVersion(int cameraId, int* facing) { 389 struct camera_info info; 390 if (mModule->get_camera_info(cameraId, &info) != OK) { 391 return -1; 392 } 393 394 int deviceVersion; 395 if (mModule->common.module_api_version >= CAMERA_MODULE_API_VERSION_2_0) { 396 deviceVersion = info.device_version; 397 } else { 398 deviceVersion = CAMERA_DEVICE_API_VERSION_1_0; 399 } 400 401 if (facing) { 402 *facing = info.facing; 403 } 404 405 return deviceVersion; 406 } 407 408 status_t CameraService::filterOpenErrorCode(status_t err) { 409 switch(err) { 410 case NO_ERROR: 411 case -EBUSY: 412 case -EINVAL: 413 case -EUSERS: 414 return err; 415 default: 416 break; 417 } 418 return -ENODEV; 419 } 420 421 status_t CameraService::filterGetInfoErrorCode(status_t err) { 422 switch(err) { 423 case NO_ERROR: 424 case -EINVAL: 425 return err; 426 default: 427 break; 428 } 429 return -ENODEV; 430 } 431 432 bool CameraService::setUpVendorTags() { 433 vendor_tag_ops_t vOps = vendor_tag_ops_t(); 434 435 // Check if vendor operations have been implemented 436 if (mModule->get_vendor_tag_ops == NULL) { 437 ALOGI("%s: No vendor tags defined for this device.", __FUNCTION__); 438 return false; 439 } 440 441 ATRACE_BEGIN("camera3->get_metadata_vendor_tag_ops"); 442 mModule->get_vendor_tag_ops(&vOps); 443 ATRACE_END(); 444 445 // Ensure all vendor operations are present 446 if (vOps.get_tag_count == NULL || vOps.get_all_tags == NULL || 447 vOps.get_section_name == NULL || vOps.get_tag_name == NULL || 448 vOps.get_tag_type == NULL) { 449 ALOGE("%s: Vendor tag operations not fully defined. Ignoring definitions." 450 , __FUNCTION__); 451 return false; 452 } 453 454 // Read all vendor tag definitions into a descriptor 455 sp<VendorTagDescriptor> desc; 456 status_t res; 457 if ((res = VendorTagDescriptor::createDescriptorFromOps(&vOps, /*out*/desc)) 458 != OK) { 459 ALOGE("%s: Could not generate descriptor from vendor tag operations," 460 "received error %s (%d). Camera clients will not be able to use" 461 "vendor tags", __FUNCTION__, strerror(res), res); 462 return false; 463 } 464 465 // Set the global descriptor to use with camera metadata 466 VendorTagDescriptor::setAsGlobalVendorTagDescriptor(desc); 467 return true; 468 } 469 470 status_t CameraService::initializeShimMetadata(int cameraId) { 471 int pid = getCallingPid(); 472 int uid = getCallingUid(); 473 status_t ret = validateConnect(cameraId, uid); 474 if (ret != OK) { 475 // Error already logged by callee 476 return ret; 477 } 478 479 bool needsNewClient = false; 480 sp<Client> client; 481 482 String16 internalPackageName("media"); 483 { // Scope for service lock 484 Mutex::Autolock lock(mServiceLock); 485 if (mClient[cameraId] != NULL) { 486 client = static_cast<Client*>(mClient[cameraId].promote().get()); 487 } 488 if (client == NULL) { 489 needsNewClient = true; 490 ret = connectHelperLocked(/*out*/client, 491 /*cameraClient*/NULL, // Empty binder callbacks 492 cameraId, 493 internalPackageName, 494 uid, 495 pid); 496 497 if (ret != OK) { 498 // Error already logged by callee 499 return ret; 500 } 501 } 502 503 if (client == NULL) { 504 ALOGE("%s: Could not connect to client camera device.", __FUNCTION__); 505 return BAD_VALUE; 506 } 507 508 String8 rawParams = client->getParameters(); 509 CameraParameters params(rawParams); 510 mShimParams.add(cameraId, params); 511 } 512 513 // Close client if one was opened solely for this call 514 if (needsNewClient) { 515 client->disconnect(); 516 } 517 return OK; 518 } 519 520 status_t CameraService::getLegacyParametersLazy(int cameraId, 521 /*out*/ 522 CameraParameters* parameters) { 523 524 ALOGV("%s: for cameraId: %d", __FUNCTION__, cameraId); 525 526 status_t ret = 0; 527 528 if (parameters == NULL) { 529 ALOGE("%s: parameters must not be null", __FUNCTION__); 530 return BAD_VALUE; 531 } 532 533 ssize_t index = -1; 534 { // Scope for service lock 535 Mutex::Autolock lock(mServiceLock); 536 index = mShimParams.indexOfKey(cameraId); 537 // Release service lock so initializeShimMetadata can be called correctly. 538 539 if (index >= 0) { 540 *parameters = mShimParams[index]; 541 } 542 } 543 544 if (index < 0) { 545 int64_t token = IPCThreadState::self()->clearCallingIdentity(); 546 ret = initializeShimMetadata(cameraId); 547 IPCThreadState::self()->restoreCallingIdentity(token); 548 if (ret != OK) { 549 // Error already logged by callee 550 return ret; 551 } 552 553 { // Scope for service lock 554 Mutex::Autolock lock(mServiceLock); 555 index = mShimParams.indexOfKey(cameraId); 556 557 LOG_ALWAYS_FATAL_IF(index < 0, "index should have been initialized"); 558 559 *parameters = mShimParams[index]; 560 } 561 } 562 563 return OK; 564 } 565 566 status_t CameraService::validateConnect(int cameraId, 567 /*inout*/ 568 int& clientUid) const { 569 570 int callingPid = getCallingPid(); 571 572 if (clientUid == USE_CALLING_UID) { 573 clientUid = getCallingUid(); 574 } else { 575 // We only trust our own process to forward client UIDs 576 if (callingPid != getpid()) { 577 ALOGE("CameraService::connect X (pid %d) rejected (don't trust clientUid)", 578 callingPid); 579 return PERMISSION_DENIED; 580 } 581 } 582 583 if (!mModule) { 584 ALOGE("Camera HAL module not loaded"); 585 return -ENODEV; 586 } 587 588 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 589 ALOGE("CameraService::connect X (pid %d) rejected (invalid cameraId %d).", 590 callingPid, cameraId); 591 return -ENODEV; 592 } 593 594 char value[PROPERTY_VALUE_MAX]; 595 property_get("sys.secpolicy.camera.disabled", value, "0"); 596 if (strcmp(value, "1") == 0) { 597 // Camera is disabled by DevicePolicyManager. 598 ALOGI("Camera is disabled. connect X (pid %d) rejected", callingPid); 599 return -EACCES; 600 } 601 602 ICameraServiceListener::Status currentStatus = getStatus(cameraId); 603 if (currentStatus == ICameraServiceListener::STATUS_NOT_PRESENT) { 604 ALOGI("Camera is not plugged in," 605 " connect X (pid %d) rejected", callingPid); 606 return -ENODEV; 607 } else if (currentStatus == ICameraServiceListener::STATUS_ENUMERATING) { 608 ALOGI("Camera is enumerating," 609 " connect X (pid %d) rejected", callingPid); 610 return -EBUSY; 611 } 612 // Else don't check for STATUS_NOT_AVAILABLE. 613 // -- It's done implicitly in canConnectUnsafe /w the mBusy array 614 615 return OK; 616 } 617 618 bool CameraService::canConnectUnsafe(int cameraId, 619 const String16& clientPackageName, 620 const sp<IBinder>& remoteCallback, 621 sp<BasicClient> &client) { 622 String8 clientName8(clientPackageName); 623 int callingPid = getCallingPid(); 624 625 if (mClient[cameraId] != 0) { 626 client = mClient[cameraId].promote(); 627 if (client != 0) { 628 if (remoteCallback == client->getRemote()) { 629 LOG1("CameraService::connect X (pid %d) (the same client)", 630 callingPid); 631 return true; 632 } else { 633 // TODOSC: need to support 1 regular client, 634 // multiple shared clients here 635 ALOGW("CameraService::connect X (pid %d) rejected" 636 " (existing client).", callingPid); 637 return false; 638 } 639 } 640 mClient[cameraId].clear(); 641 } 642 643 /* 644 mBusy is set to false as the last step of the Client destructor, 645 after which it is guaranteed that the Client destructor has finished ( 646 including any inherited destructors) 647 648 We only need this for a Client subclasses since we don't allow 649 multiple Clents to be opened concurrently, but multiple BasicClient 650 would be fine 651 */ 652 if (mBusy[cameraId]) { 653 ALOGW("CameraService::connect X (pid %d, \"%s\") rejected" 654 " (camera %d is still busy).", callingPid, 655 clientName8.string(), cameraId); 656 return false; 657 } 658 659 return true; 660 } 661 662 status_t CameraService::connectHelperLocked( 663 /*out*/ 664 sp<Client>& client, 665 /*in*/ 666 const sp<ICameraClient>& cameraClient, 667 int cameraId, 668 const String16& clientPackageName, 669 int clientUid, 670 int callingPid, 671 int halVersion, 672 bool legacyMode) { 673 674 int facing = -1; 675 int deviceVersion = getDeviceVersion(cameraId, &facing); 676 677 if (halVersion < 0 || halVersion == deviceVersion) { 678 // Default path: HAL version is unspecified by caller, create CameraClient 679 // based on device version reported by the HAL. 680 switch(deviceVersion) { 681 case CAMERA_DEVICE_API_VERSION_1_0: 682 client = new CameraClient(this, cameraClient, 683 clientPackageName, cameraId, 684 facing, callingPid, clientUid, getpid(), legacyMode); 685 break; 686 case CAMERA_DEVICE_API_VERSION_2_0: 687 case CAMERA_DEVICE_API_VERSION_2_1: 688 case CAMERA_DEVICE_API_VERSION_3_0: 689 case CAMERA_DEVICE_API_VERSION_3_1: 690 case CAMERA_DEVICE_API_VERSION_3_2: 691 client = new Camera2Client(this, cameraClient, 692 clientPackageName, cameraId, 693 facing, callingPid, clientUid, getpid(), legacyMode); 694 break; 695 case -1: 696 ALOGE("Invalid camera id %d", cameraId); 697 return BAD_VALUE; 698 default: 699 ALOGE("Unknown camera device HAL version: %d", deviceVersion); 700 return INVALID_OPERATION; 701 } 702 } else { 703 // A particular HAL version is requested by caller. Create CameraClient 704 // based on the requested HAL version. 705 if (deviceVersion > CAMERA_DEVICE_API_VERSION_1_0 && 706 halVersion == CAMERA_DEVICE_API_VERSION_1_0) { 707 // Only support higher HAL version device opened as HAL1.0 device. 708 client = new CameraClient(this, cameraClient, 709 clientPackageName, cameraId, 710 facing, callingPid, clientUid, getpid(), legacyMode); 711 } else { 712 // Other combinations (e.g. HAL3.x open as HAL2.x) are not supported yet. 713 ALOGE("Invalid camera HAL version %x: HAL %x device can only be" 714 " opened as HAL %x device", halVersion, deviceVersion, 715 CAMERA_DEVICE_API_VERSION_1_0); 716 return INVALID_OPERATION; 717 } 718 } 719 720 status_t status = connectFinishUnsafe(client, client->getRemote()); 721 if (status != OK) { 722 // this is probably not recoverable.. maybe the client can try again 723 return status; 724 } 725 726 mClient[cameraId] = client; 727 LOG1("CameraService::connect X (id %d, this pid is %d)", cameraId, 728 getpid()); 729 730 return OK; 731 } 732 733 status_t CameraService::connect( 734 const sp<ICameraClient>& cameraClient, 735 int cameraId, 736 const String16& clientPackageName, 737 int clientUid, 738 /*out*/ 739 sp<ICamera>& device) { 740 741 String8 clientName8(clientPackageName); 742 int callingPid = getCallingPid(); 743 744 LOG1("CameraService::connect E (pid %d \"%s\", id %d)", callingPid, 745 clientName8.string(), cameraId); 746 747 status_t status = validateConnect(cameraId, /*inout*/clientUid); 748 if (status != OK) { 749 return status; 750 } 751 752 753 sp<Client> client; 754 { 755 Mutex::Autolock lock(mServiceLock); 756 sp<BasicClient> clientTmp; 757 if (!canConnectUnsafe(cameraId, clientPackageName, 758 cameraClient->asBinder(), 759 /*out*/clientTmp)) { 760 return -EBUSY; 761 } else if (client.get() != NULL) { 762 device = static_cast<Client*>(clientTmp.get()); 763 return OK; 764 } 765 766 status = connectHelperLocked(/*out*/client, 767 cameraClient, 768 cameraId, 769 clientPackageName, 770 clientUid, 771 callingPid); 772 if (status != OK) { 773 return status; 774 } 775 776 } 777 // important: release the mutex here so the client can call back 778 // into the service from its destructor (can be at the end of the call) 779 780 device = client; 781 return OK; 782 } 783 784 status_t CameraService::connectLegacy( 785 const sp<ICameraClient>& cameraClient, 786 int cameraId, int halVersion, 787 const String16& clientPackageName, 788 int clientUid, 789 /*out*/ 790 sp<ICamera>& device) { 791 792 if (halVersion != CAMERA_HAL_API_VERSION_UNSPECIFIED && 793 mModule->common.module_api_version < CAMERA_MODULE_API_VERSION_2_3) { 794 /* 795 * Either the HAL version is unspecified in which case this just creates 796 * a camera client selected by the latest device version, or 797 * it's a particular version in which case the HAL must supported 798 * the open_legacy call 799 */ 800 ALOGE("%s: camera HAL module version %x doesn't support connecting to legacy HAL devices!", 801 __FUNCTION__, mModule->common.module_api_version); 802 return INVALID_OPERATION; 803 } 804 805 String8 clientName8(clientPackageName); 806 int callingPid = getCallingPid(); 807 808 LOG1("CameraService::connect legacy E (pid %d \"%s\", id %d)", callingPid, 809 clientName8.string(), cameraId); 810 811 status_t status = validateConnect(cameraId, /*inout*/clientUid); 812 if (status != OK) { 813 return status; 814 } 815 816 sp<Client> client; 817 { 818 Mutex::Autolock lock(mServiceLock); 819 sp<BasicClient> clientTmp; 820 if (!canConnectUnsafe(cameraId, clientPackageName, 821 cameraClient->asBinder(), 822 /*out*/clientTmp)) { 823 return -EBUSY; 824 } else if (client.get() != NULL) { 825 device = static_cast<Client*>(clientTmp.get()); 826 return OK; 827 } 828 829 status = connectHelperLocked(/*out*/client, 830 cameraClient, 831 cameraId, 832 clientPackageName, 833 clientUid, 834 callingPid, 835 halVersion, 836 /*legacyMode*/true); 837 if (status != OK) { 838 return status; 839 } 840 841 } 842 // important: release the mutex here so the client can call back 843 // into the service from its destructor (can be at the end of the call) 844 845 device = client; 846 return OK; 847 } 848 849 status_t CameraService::connectFinishUnsafe(const sp<BasicClient>& client, 850 const sp<IBinder>& remoteCallback) { 851 status_t status = client->initialize(mModule); 852 if (status != OK) { 853 ALOGE("%s: Could not initialize client from HAL module.", __FUNCTION__); 854 return status; 855 } 856 if (remoteCallback != NULL) { 857 remoteCallback->linkToDeath(this); 858 } 859 860 return OK; 861 } 862 863 status_t CameraService::connectPro( 864 const sp<IProCameraCallbacks>& cameraCb, 865 int cameraId, 866 const String16& clientPackageName, 867 int clientUid, 868 /*out*/ 869 sp<IProCameraUser>& device) 870 { 871 if (cameraCb == 0) { 872 ALOGE("%s: Callback must not be null", __FUNCTION__); 873 return BAD_VALUE; 874 } 875 876 String8 clientName8(clientPackageName); 877 int callingPid = getCallingPid(); 878 879 LOG1("CameraService::connectPro E (pid %d \"%s\", id %d)", callingPid, 880 clientName8.string(), cameraId); 881 status_t status = validateConnect(cameraId, /*inout*/clientUid); 882 if (status != OK) { 883 return status; 884 } 885 886 sp<ProClient> client; 887 { 888 Mutex::Autolock lock(mServiceLock); 889 { 890 sp<BasicClient> client; 891 if (!canConnectUnsafe(cameraId, clientPackageName, 892 cameraCb->asBinder(), 893 /*out*/client)) { 894 return -EBUSY; 895 } 896 } 897 898 int facing = -1; 899 int deviceVersion = getDeviceVersion(cameraId, &facing); 900 901 switch(deviceVersion) { 902 case CAMERA_DEVICE_API_VERSION_1_0: 903 ALOGE("Camera id %d uses HALv1, doesn't support ProCamera", 904 cameraId); 905 return -EOPNOTSUPP; 906 break; 907 case CAMERA_DEVICE_API_VERSION_2_0: 908 case CAMERA_DEVICE_API_VERSION_2_1: 909 case CAMERA_DEVICE_API_VERSION_3_0: 910 case CAMERA_DEVICE_API_VERSION_3_1: 911 case CAMERA_DEVICE_API_VERSION_3_2: 912 client = new ProCamera2Client(this, cameraCb, clientPackageName, 913 cameraId, facing, callingPid, clientUid, getpid()); 914 break; 915 case -1: 916 ALOGE("Invalid camera id %d", cameraId); 917 return BAD_VALUE; 918 default: 919 ALOGE("Unknown camera device HAL version: %d", deviceVersion); 920 return INVALID_OPERATION; 921 } 922 923 status_t status = connectFinishUnsafe(client, client->getRemote()); 924 if (status != OK) { 925 return status; 926 } 927 928 mProClientList[cameraId].push(client); 929 930 LOG1("CameraService::connectPro X (id %d, this pid is %d)", cameraId, 931 getpid()); 932 } 933 // important: release the mutex here so the client can call back 934 // into the service from its destructor (can be at the end of the call) 935 device = client; 936 return OK; 937 } 938 939 status_t CameraService::connectDevice( 940 const sp<ICameraDeviceCallbacks>& cameraCb, 941 int cameraId, 942 const String16& clientPackageName, 943 int clientUid, 944 /*out*/ 945 sp<ICameraDeviceUser>& device) 946 { 947 948 String8 clientName8(clientPackageName); 949 int callingPid = getCallingPid(); 950 951 LOG1("CameraService::connectDevice E (pid %d \"%s\", id %d)", callingPid, 952 clientName8.string(), cameraId); 953 954 status_t status = validateConnect(cameraId, /*inout*/clientUid); 955 if (status != OK) { 956 return status; 957 } 958 959 sp<CameraDeviceClient> client; 960 { 961 Mutex::Autolock lock(mServiceLock); 962 { 963 sp<BasicClient> client; 964 if (!canConnectUnsafe(cameraId, clientPackageName, 965 cameraCb->asBinder(), 966 /*out*/client)) { 967 return -EBUSY; 968 } 969 } 970 971 int facing = -1; 972 int deviceVersion = getDeviceVersion(cameraId, &facing); 973 974 switch(deviceVersion) { 975 case CAMERA_DEVICE_API_VERSION_1_0: 976 ALOGW("Camera using old HAL version: %d", deviceVersion); 977 return -EOPNOTSUPP; 978 // TODO: don't allow 2.0 Only allow 2.1 and higher 979 case CAMERA_DEVICE_API_VERSION_2_0: 980 case CAMERA_DEVICE_API_VERSION_2_1: 981 case CAMERA_DEVICE_API_VERSION_3_0: 982 case CAMERA_DEVICE_API_VERSION_3_1: 983 case CAMERA_DEVICE_API_VERSION_3_2: 984 client = new CameraDeviceClient(this, cameraCb, clientPackageName, 985 cameraId, facing, callingPid, clientUid, getpid()); 986 break; 987 case -1: 988 ALOGE("Invalid camera id %d", cameraId); 989 return BAD_VALUE; 990 default: 991 ALOGE("Unknown camera device HAL version: %d", deviceVersion); 992 return INVALID_OPERATION; 993 } 994 995 status_t status = connectFinishUnsafe(client, client->getRemote()); 996 if (status != OK) { 997 // this is probably not recoverable.. maybe the client can try again 998 return status; 999 } 1000 1001 LOG1("CameraService::connectDevice X (id %d, this pid is %d)", cameraId, 1002 getpid()); 1003 1004 mClient[cameraId] = client; 1005 } 1006 // important: release the mutex here so the client can call back 1007 // into the service from its destructor (can be at the end of the call) 1008 1009 device = client; 1010 return OK; 1011 } 1012 1013 1014 status_t CameraService::addListener( 1015 const sp<ICameraServiceListener>& listener) { 1016 ALOGV("%s: Add listener %p", __FUNCTION__, listener.get()); 1017 1018 if (listener == 0) { 1019 ALOGE("%s: Listener must not be null", __FUNCTION__); 1020 return BAD_VALUE; 1021 } 1022 1023 Mutex::Autolock lock(mServiceLock); 1024 1025 Vector<sp<ICameraServiceListener> >::iterator it, end; 1026 for (it = mListenerList.begin(); it != mListenerList.end(); ++it) { 1027 if ((*it)->asBinder() == listener->asBinder()) { 1028 ALOGW("%s: Tried to add listener %p which was already subscribed", 1029 __FUNCTION__, listener.get()); 1030 return ALREADY_EXISTS; 1031 } 1032 } 1033 1034 mListenerList.push_back(listener); 1035 1036 /* Immediately signal current status to this listener only */ 1037 { 1038 Mutex::Autolock m(mStatusMutex) ; 1039 int numCams = getNumberOfCameras(); 1040 for (int i = 0; i < numCams; ++i) { 1041 listener->onStatusChanged(mStatusList[i], i); 1042 } 1043 } 1044 1045 return OK; 1046 } 1047 status_t CameraService::removeListener( 1048 const sp<ICameraServiceListener>& listener) { 1049 ALOGV("%s: Remove listener %p", __FUNCTION__, listener.get()); 1050 1051 if (listener == 0) { 1052 ALOGE("%s: Listener must not be null", __FUNCTION__); 1053 return BAD_VALUE; 1054 } 1055 1056 Mutex::Autolock lock(mServiceLock); 1057 1058 Vector<sp<ICameraServiceListener> >::iterator it; 1059 for (it = mListenerList.begin(); it != mListenerList.end(); ++it) { 1060 if ((*it)->asBinder() == listener->asBinder()) { 1061 mListenerList.erase(it); 1062 return OK; 1063 } 1064 } 1065 1066 ALOGW("%s: Tried to remove a listener %p which was not subscribed", 1067 __FUNCTION__, listener.get()); 1068 1069 return BAD_VALUE; 1070 } 1071 1072 status_t CameraService::getLegacyParameters( 1073 int cameraId, 1074 /*out*/ 1075 String16* parameters) { 1076 ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId); 1077 1078 if (parameters == NULL) { 1079 ALOGE("%s: parameters must not be null", __FUNCTION__); 1080 return BAD_VALUE; 1081 } 1082 1083 status_t ret = 0; 1084 1085 CameraParameters shimParams; 1086 if ((ret = getLegacyParametersLazy(cameraId, /*out*/&shimParams)) != OK) { 1087 // Error logged by caller 1088 return ret; 1089 } 1090 1091 String8 shimParamsString8 = shimParams.flatten(); 1092 String16 shimParamsString16 = String16(shimParamsString8); 1093 1094 *parameters = shimParamsString16; 1095 1096 return OK; 1097 } 1098 1099 status_t CameraService::supportsCameraApi(int cameraId, int apiVersion) { 1100 ALOGV("%s: for camera ID = %d", __FUNCTION__, cameraId); 1101 1102 switch (apiVersion) { 1103 case API_VERSION_1: 1104 case API_VERSION_2: 1105 break; 1106 default: 1107 ALOGE("%s: Bad API version %d", __FUNCTION__, apiVersion); 1108 return BAD_VALUE; 1109 } 1110 1111 int facing = -1; 1112 int deviceVersion = getDeviceVersion(cameraId, &facing); 1113 1114 switch(deviceVersion) { 1115 case CAMERA_DEVICE_API_VERSION_1_0: 1116 case CAMERA_DEVICE_API_VERSION_2_0: 1117 case CAMERA_DEVICE_API_VERSION_2_1: 1118 case CAMERA_DEVICE_API_VERSION_3_0: 1119 case CAMERA_DEVICE_API_VERSION_3_1: 1120 if (apiVersion == API_VERSION_2) { 1121 ALOGV("%s: Camera id %d uses HAL prior to HAL3.2, doesn't support api2 without shim", 1122 __FUNCTION__, cameraId); 1123 return -EOPNOTSUPP; 1124 } else { // if (apiVersion == API_VERSION_1) { 1125 ALOGV("%s: Camera id %d uses older HAL before 3.2, but api1 is always supported", 1126 __FUNCTION__, cameraId); 1127 return OK; 1128 } 1129 case CAMERA_DEVICE_API_VERSION_3_2: 1130 ALOGV("%s: Camera id %d uses HAL3.2 or newer, supports api1/api2 directly", 1131 __FUNCTION__, cameraId); 1132 return OK; 1133 case -1: 1134 ALOGE("%s: Invalid camera id %d", __FUNCTION__, cameraId); 1135 return BAD_VALUE; 1136 default: 1137 ALOGE("%s: Unknown camera device HAL version: %d", __FUNCTION__, deviceVersion); 1138 return INVALID_OPERATION; 1139 } 1140 1141 return OK; 1142 } 1143 1144 void CameraService::removeClientByRemote(const wp<IBinder>& remoteBinder) { 1145 int callingPid = getCallingPid(); 1146 LOG1("CameraService::removeClientByRemote E (pid %d)", callingPid); 1147 1148 // Declare this before the lock to make absolutely sure the 1149 // destructor won't be called with the lock held. 1150 Mutex::Autolock lock(mServiceLock); 1151 1152 int outIndex; 1153 sp<BasicClient> client = findClientUnsafe(remoteBinder, outIndex); 1154 1155 if (client != 0) { 1156 // Found our camera, clear and leave. 1157 LOG1("removeClient: clear camera %d", outIndex); 1158 1159 sp<IBinder> remote = client->getRemote(); 1160 if (remote != NULL) { 1161 remote->unlinkToDeath(this); 1162 } 1163 1164 mClient[outIndex].clear(); 1165 } else { 1166 1167 sp<ProClient> clientPro = findProClientUnsafe(remoteBinder); 1168 1169 if (clientPro != NULL) { 1170 // Found our camera, clear and leave. 1171 LOG1("removeClient: clear pro %p", clientPro.get()); 1172 1173 clientPro->getRemoteCallback()->asBinder()->unlinkToDeath(this); 1174 } 1175 } 1176 1177 LOG1("CameraService::removeClientByRemote X (pid %d)", callingPid); 1178 } 1179 1180 sp<CameraService::ProClient> CameraService::findProClientUnsafe( 1181 const wp<IBinder>& cameraCallbacksRemote) 1182 { 1183 sp<ProClient> clientPro; 1184 1185 for (int i = 0; i < mNumberOfCameras; ++i) { 1186 Vector<size_t> removeIdx; 1187 1188 for (size_t j = 0; j < mProClientList[i].size(); ++j) { 1189 wp<ProClient> cl = mProClientList[i][j]; 1190 1191 sp<ProClient> clStrong = cl.promote(); 1192 if (clStrong != NULL && clStrong->getRemote() == cameraCallbacksRemote) { 1193 clientPro = clStrong; 1194 break; 1195 } else if (clStrong == NULL) { 1196 // mark to clean up dead ptr 1197 removeIdx.push(j); 1198 } 1199 } 1200 1201 // remove stale ptrs (in reverse so the indices dont change) 1202 for (ssize_t j = (ssize_t)removeIdx.size() - 1; j >= 0; --j) { 1203 mProClientList[i].removeAt(removeIdx[j]); 1204 } 1205 1206 } 1207 1208 return clientPro; 1209 } 1210 1211 sp<CameraService::BasicClient> CameraService::findClientUnsafe( 1212 const wp<IBinder>& cameraClient, int& outIndex) { 1213 sp<BasicClient> client; 1214 1215 for (int i = 0; i < mNumberOfCameras; i++) { 1216 1217 // This happens when we have already disconnected (or this is 1218 // just another unused camera). 1219 if (mClient[i] == 0) continue; 1220 1221 // Promote mClient. It can fail if we are called from this path: 1222 // Client::~Client() -> disconnect() -> removeClientByRemote(). 1223 client = mClient[i].promote(); 1224 1225 // Clean up stale client entry 1226 if (client == NULL) { 1227 mClient[i].clear(); 1228 continue; 1229 } 1230 1231 if (cameraClient == client->getRemote()) { 1232 // Found our camera 1233 outIndex = i; 1234 return client; 1235 } 1236 } 1237 1238 outIndex = -1; 1239 return NULL; 1240 } 1241 1242 CameraService::BasicClient* CameraService::getClientByIdUnsafe(int cameraId) { 1243 if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL; 1244 return mClient[cameraId].unsafe_get(); 1245 } 1246 1247 Mutex* CameraService::getClientLockById(int cameraId) { 1248 if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL; 1249 return &mClientLock[cameraId]; 1250 } 1251 1252 sp<CameraService::BasicClient> CameraService::getClientByRemote( 1253 const wp<IBinder>& cameraClient) { 1254 1255 // Declare this before the lock to make absolutely sure the 1256 // destructor won't be called with the lock held. 1257 sp<BasicClient> client; 1258 1259 Mutex::Autolock lock(mServiceLock); 1260 1261 int outIndex; 1262 client = findClientUnsafe(cameraClient, outIndex); 1263 1264 return client; 1265 } 1266 1267 status_t CameraService::onTransact( 1268 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) { 1269 // Permission checks 1270 switch (code) { 1271 case BnCameraService::CONNECT: 1272 case BnCameraService::CONNECT_PRO: 1273 case BnCameraService::CONNECT_DEVICE: 1274 case BnCameraService::CONNECT_LEGACY: 1275 const int pid = getCallingPid(); 1276 const int self_pid = getpid(); 1277 if (pid != self_pid) { 1278 // we're called from a different process, do the real check 1279 if (!checkCallingPermission( 1280 String16("android.permission.CAMERA"))) { 1281 const int uid = getCallingUid(); 1282 ALOGE("Permission Denial: " 1283 "can't use the camera pid=%d, uid=%d", pid, uid); 1284 return PERMISSION_DENIED; 1285 } 1286 } 1287 break; 1288 } 1289 1290 return BnCameraService::onTransact(code, data, reply, flags); 1291 } 1292 1293 // The reason we need this busy bit is a new CameraService::connect() request 1294 // may come in while the previous Client's destructor has not been run or is 1295 // still running. If the last strong reference of the previous Client is gone 1296 // but the destructor has not been finished, we should not allow the new Client 1297 // to be created because we need to wait for the previous Client to tear down 1298 // the hardware first. 1299 void CameraService::setCameraBusy(int cameraId) { 1300 android_atomic_write(1, &mBusy[cameraId]); 1301 1302 ALOGV("setCameraBusy cameraId=%d", cameraId); 1303 } 1304 1305 void CameraService::setCameraFree(int cameraId) { 1306 android_atomic_write(0, &mBusy[cameraId]); 1307 1308 ALOGV("setCameraFree cameraId=%d", cameraId); 1309 } 1310 1311 // We share the media players for shutter and recording sound for all clients. 1312 // A reference count is kept to determine when we will actually release the 1313 // media players. 1314 1315 MediaPlayer* CameraService::newMediaPlayer(const char *file) { 1316 MediaPlayer* mp = new MediaPlayer(); 1317 if (mp->setDataSource(NULL /* httpService */, file, NULL) == NO_ERROR) { 1318 mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE); 1319 mp->prepare(); 1320 } else { 1321 ALOGE("Failed to load CameraService sounds: %s", file); 1322 return NULL; 1323 } 1324 return mp; 1325 } 1326 1327 void CameraService::loadSound() { 1328 Mutex::Autolock lock(mSoundLock); 1329 LOG1("CameraService::loadSound ref=%d", mSoundRef); 1330 if (mSoundRef++) return; 1331 1332 mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg"); 1333 mSoundPlayer[SOUND_RECORDING] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg"); 1334 } 1335 1336 void CameraService::releaseSound() { 1337 Mutex::Autolock lock(mSoundLock); 1338 LOG1("CameraService::releaseSound ref=%d", mSoundRef); 1339 if (--mSoundRef) return; 1340 1341 for (int i = 0; i < NUM_SOUNDS; i++) { 1342 if (mSoundPlayer[i] != 0) { 1343 mSoundPlayer[i]->disconnect(); 1344 mSoundPlayer[i].clear(); 1345 } 1346 } 1347 } 1348 1349 void CameraService::playSound(sound_kind kind) { 1350 LOG1("playSound(%d)", kind); 1351 Mutex::Autolock lock(mSoundLock); 1352 sp<MediaPlayer> player = mSoundPlayer[kind]; 1353 if (player != 0) { 1354 player->seekTo(0); 1355 player->start(); 1356 } 1357 } 1358 1359 // ---------------------------------------------------------------------------- 1360 1361 CameraService::Client::Client(const sp<CameraService>& cameraService, 1362 const sp<ICameraClient>& cameraClient, 1363 const String16& clientPackageName, 1364 int cameraId, int cameraFacing, 1365 int clientPid, uid_t clientUid, 1366 int servicePid) : 1367 CameraService::BasicClient(cameraService, cameraClient->asBinder(), 1368 clientPackageName, 1369 cameraId, cameraFacing, 1370 clientPid, clientUid, 1371 servicePid) 1372 { 1373 int callingPid = getCallingPid(); 1374 LOG1("Client::Client E (pid %d, id %d)", callingPid, cameraId); 1375 1376 mRemoteCallback = cameraClient; 1377 1378 cameraService->setCameraBusy(cameraId); 1379 cameraService->loadSound(); 1380 1381 LOG1("Client::Client X (pid %d, id %d)", callingPid, cameraId); 1382 } 1383 1384 // tear down the client 1385 CameraService::Client::~Client() { 1386 ALOGV("~Client"); 1387 mDestructionStarted = true; 1388 1389 mCameraService->releaseSound(); 1390 // unconditionally disconnect. function is idempotent 1391 Client::disconnect(); 1392 } 1393 1394 CameraService::BasicClient::BasicClient(const sp<CameraService>& cameraService, 1395 const sp<IBinder>& remoteCallback, 1396 const String16& clientPackageName, 1397 int cameraId, int cameraFacing, 1398 int clientPid, uid_t clientUid, 1399 int servicePid): 1400 mClientPackageName(clientPackageName) 1401 { 1402 mCameraService = cameraService; 1403 mRemoteBinder = remoteCallback; 1404 mCameraId = cameraId; 1405 mCameraFacing = cameraFacing; 1406 mClientPid = clientPid; 1407 mClientUid = clientUid; 1408 mServicePid = servicePid; 1409 mOpsActive = false; 1410 mDestructionStarted = false; 1411 } 1412 1413 CameraService::BasicClient::~BasicClient() { 1414 ALOGV("~BasicClient"); 1415 mDestructionStarted = true; 1416 } 1417 1418 void CameraService::BasicClient::disconnect() { 1419 ALOGV("BasicClient::disconnect"); 1420 mCameraService->removeClientByRemote(mRemoteBinder); 1421 1422 finishCameraOps(); 1423 // client shouldn't be able to call into us anymore 1424 mClientPid = 0; 1425 } 1426 1427 status_t CameraService::BasicClient::startCameraOps() { 1428 int32_t res; 1429 // Notify app ops that the camera is not available 1430 mOpsCallback = new OpsCallback(this); 1431 1432 { 1433 ALOGV("%s: Start camera ops, package name = %s, client UID = %d", 1434 __FUNCTION__, String8(mClientPackageName).string(), mClientUid); 1435 } 1436 1437 mAppOpsManager.startWatchingMode(AppOpsManager::OP_CAMERA, 1438 mClientPackageName, mOpsCallback); 1439 res = mAppOpsManager.startOp(AppOpsManager::OP_CAMERA, 1440 mClientUid, mClientPackageName); 1441 1442 if (res != AppOpsManager::MODE_ALLOWED) { 1443 ALOGI("Camera %d: Access for \"%s\" has been revoked", 1444 mCameraId, String8(mClientPackageName).string()); 1445 return PERMISSION_DENIED; 1446 } 1447 1448 mOpsActive = true; 1449 1450 // Transition device availability listeners from PRESENT -> NOT_AVAILABLE 1451 mCameraService->updateStatus(ICameraServiceListener::STATUS_NOT_AVAILABLE, 1452 mCameraId); 1453 1454 return OK; 1455 } 1456 1457 status_t CameraService::BasicClient::finishCameraOps() { 1458 // Check if startCameraOps succeeded, and if so, finish the camera op 1459 if (mOpsActive) { 1460 // Notify app ops that the camera is available again 1461 mAppOpsManager.finishOp(AppOpsManager::OP_CAMERA, mClientUid, 1462 mClientPackageName); 1463 mOpsActive = false; 1464 1465 // Notify device availability listeners that this camera is available 1466 // again 1467 1468 StatusVector rejectSourceStates; 1469 rejectSourceStates.push_back(ICameraServiceListener::STATUS_NOT_PRESENT); 1470 rejectSourceStates.push_back(ICameraServiceListener::STATUS_ENUMERATING); 1471 1472 // Transition to PRESENT if the camera is not in either of above 2 1473 // states 1474 mCameraService->updateStatus(ICameraServiceListener::STATUS_PRESENT, 1475 mCameraId, 1476 &rejectSourceStates); 1477 1478 } 1479 // Always stop watching, even if no camera op is active 1480 mAppOpsManager.stopWatchingMode(mOpsCallback); 1481 mOpsCallback.clear(); 1482 1483 return OK; 1484 } 1485 1486 void CameraService::BasicClient::opChanged(int32_t op, const String16& packageName) { 1487 String8 name(packageName); 1488 String8 myName(mClientPackageName); 1489 1490 if (op != AppOpsManager::OP_CAMERA) { 1491 ALOGW("Unexpected app ops notification received: %d", op); 1492 return; 1493 } 1494 1495 int32_t res; 1496 res = mAppOpsManager.checkOp(AppOpsManager::OP_CAMERA, 1497 mClientUid, mClientPackageName); 1498 ALOGV("checkOp returns: %d, %s ", res, 1499 res == AppOpsManager::MODE_ALLOWED ? "ALLOWED" : 1500 res == AppOpsManager::MODE_IGNORED ? "IGNORED" : 1501 res == AppOpsManager::MODE_ERRORED ? "ERRORED" : 1502 "UNKNOWN"); 1503 1504 if (res != AppOpsManager::MODE_ALLOWED) { 1505 ALOGI("Camera %d: Access for \"%s\" revoked", mCameraId, 1506 myName.string()); 1507 // Reset the client PID to allow server-initiated disconnect, 1508 // and to prevent further calls by client. 1509 mClientPid = getCallingPid(); 1510 CaptureResultExtras resultExtras; // a dummy result (invalid) 1511 notifyError(ICameraDeviceCallbacks::ERROR_CAMERA_SERVICE, resultExtras); 1512 disconnect(); 1513 } 1514 } 1515 1516 // ---------------------------------------------------------------------------- 1517 1518 Mutex* CameraService::Client::getClientLockFromCookie(void* user) { 1519 return gCameraService->getClientLockById((int)(intptr_t) user); 1520 } 1521 1522 // Provide client pointer for callbacks. Client lock returned from getClientLockFromCookie should 1523 // be acquired for this to be safe 1524 CameraService::Client* CameraService::Client::getClientFromCookie(void* user) { 1525 BasicClient *basicClient = gCameraService->getClientByIdUnsafe((int)(intptr_t) user); 1526 // OK: only CameraClient calls this, and they already cast anyway. 1527 Client* client = static_cast<Client*>(basicClient); 1528 1529 // This could happen if the Client is in the process of shutting down (the 1530 // last strong reference is gone, but the destructor hasn't finished 1531 // stopping the hardware). 1532 if (client == NULL) return NULL; 1533 1534 // destruction already started, so should not be accessed 1535 if (client->mDestructionStarted) return NULL; 1536 1537 return client; 1538 } 1539 1540 void CameraService::Client::notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode, 1541 const CaptureResultExtras& resultExtras) { 1542 mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0); 1543 } 1544 1545 // NOTE: function is idempotent 1546 void CameraService::Client::disconnect() { 1547 ALOGV("Client::disconnect"); 1548 BasicClient::disconnect(); 1549 mCameraService->setCameraFree(mCameraId); 1550 } 1551 1552 CameraService::Client::OpsCallback::OpsCallback(wp<BasicClient> client): 1553 mClient(client) { 1554 } 1555 1556 void CameraService::Client::OpsCallback::opChanged(int32_t op, 1557 const String16& packageName) { 1558 sp<BasicClient> client = mClient.promote(); 1559 if (client != NULL) { 1560 client->opChanged(op, packageName); 1561 } 1562 } 1563 1564 // ---------------------------------------------------------------------------- 1565 // IProCamera 1566 // ---------------------------------------------------------------------------- 1567 1568 CameraService::ProClient::ProClient(const sp<CameraService>& cameraService, 1569 const sp<IProCameraCallbacks>& remoteCallback, 1570 const String16& clientPackageName, 1571 int cameraId, 1572 int cameraFacing, 1573 int clientPid, 1574 uid_t clientUid, 1575 int servicePid) 1576 : CameraService::BasicClient(cameraService, remoteCallback->asBinder(), 1577 clientPackageName, cameraId, cameraFacing, 1578 clientPid, clientUid, servicePid) 1579 { 1580 mRemoteCallback = remoteCallback; 1581 } 1582 1583 CameraService::ProClient::~ProClient() { 1584 } 1585 1586 void CameraService::ProClient::notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode, 1587 const CaptureResultExtras& resultExtras) { 1588 mRemoteCallback->notifyCallback(CAMERA_MSG_ERROR, CAMERA_ERROR_RELEASED, 0); 1589 } 1590 1591 // ---------------------------------------------------------------------------- 1592 1593 static const int kDumpLockRetries = 50; 1594 static const int kDumpLockSleep = 60000; 1595 1596 static bool tryLock(Mutex& mutex) 1597 { 1598 bool locked = false; 1599 for (int i = 0; i < kDumpLockRetries; ++i) { 1600 if (mutex.tryLock() == NO_ERROR) { 1601 locked = true; 1602 break; 1603 } 1604 usleep(kDumpLockSleep); 1605 } 1606 return locked; 1607 } 1608 1609 status_t CameraService::dump(int fd, const Vector<String16>& args) { 1610 String8 result; 1611 if (checkCallingPermission(String16("android.permission.DUMP")) == false) { 1612 result.appendFormat("Permission Denial: " 1613 "can't dump CameraService from pid=%d, uid=%d\n", 1614 getCallingPid(), 1615 getCallingUid()); 1616 write(fd, result.string(), result.size()); 1617 } else { 1618 bool locked = tryLock(mServiceLock); 1619 // failed to lock - CameraService is probably deadlocked 1620 if (!locked) { 1621 result.append("CameraService may be deadlocked\n"); 1622 write(fd, result.string(), result.size()); 1623 } 1624 1625 bool hasClient = false; 1626 if (!mModule) { 1627 result = String8::format("No camera module available!\n"); 1628 write(fd, result.string(), result.size()); 1629 if (locked) mServiceLock.unlock(); 1630 return NO_ERROR; 1631 } 1632 1633 result = String8::format("Camera module HAL API version: 0x%x\n", 1634 mModule->common.hal_api_version); 1635 result.appendFormat("Camera module API version: 0x%x\n", 1636 mModule->common.module_api_version); 1637 result.appendFormat("Camera module name: %s\n", 1638 mModule->common.name); 1639 result.appendFormat("Camera module author: %s\n", 1640 mModule->common.author); 1641 result.appendFormat("Number of camera devices: %d\n\n", mNumberOfCameras); 1642 1643 sp<VendorTagDescriptor> desc = VendorTagDescriptor::getGlobalVendorTagDescriptor(); 1644 if (desc == NULL) { 1645 result.appendFormat("Vendor tags left unimplemented.\n"); 1646 } else { 1647 result.appendFormat("Vendor tag definitions:\n"); 1648 } 1649 1650 write(fd, result.string(), result.size()); 1651 1652 if (desc != NULL) { 1653 desc->dump(fd, /*verbosity*/2, /*indentation*/4); 1654 } 1655 1656 for (int i = 0; i < mNumberOfCameras; i++) { 1657 result = String8::format("Camera %d static information:\n", i); 1658 camera_info info; 1659 1660 status_t rc = mModule->get_camera_info(i, &info); 1661 if (rc != OK) { 1662 result.appendFormat(" Error reading static information!\n"); 1663 write(fd, result.string(), result.size()); 1664 } else { 1665 result.appendFormat(" Facing: %s\n", 1666 info.facing == CAMERA_FACING_BACK ? "BACK" : "FRONT"); 1667 result.appendFormat(" Orientation: %d\n", info.orientation); 1668 int deviceVersion; 1669 if (mModule->common.module_api_version < 1670 CAMERA_MODULE_API_VERSION_2_0) { 1671 deviceVersion = CAMERA_DEVICE_API_VERSION_1_0; 1672 } else { 1673 deviceVersion = info.device_version; 1674 } 1675 result.appendFormat(" Device version: 0x%x\n", deviceVersion); 1676 if (deviceVersion >= CAMERA_DEVICE_API_VERSION_2_0) { 1677 result.appendFormat(" Device static metadata:\n"); 1678 write(fd, result.string(), result.size()); 1679 dump_indented_camera_metadata(info.static_camera_characteristics, 1680 fd, /*verbosity*/2, /*indentation*/4); 1681 } else { 1682 write(fd, result.string(), result.size()); 1683 } 1684 } 1685 1686 sp<BasicClient> client = mClient[i].promote(); 1687 if (client == 0) { 1688 result = String8::format(" Device is closed, no client instance\n"); 1689 write(fd, result.string(), result.size()); 1690 continue; 1691 } 1692 hasClient = true; 1693 result = String8::format(" Device is open. Client instance dump:\n"); 1694 write(fd, result.string(), result.size()); 1695 client->dump(fd, args); 1696 } 1697 if (!hasClient) { 1698 result = String8::format("\nNo active camera clients yet.\n"); 1699 write(fd, result.string(), result.size()); 1700 } 1701 1702 if (locked) mServiceLock.unlock(); 1703 1704 // Dump camera traces if there were any 1705 write(fd, "\n", 1); 1706 camera3::CameraTraces::dump(fd, args); 1707 1708 // change logging level 1709 int n = args.size(); 1710 for (int i = 0; i + 1 < n; i++) { 1711 String16 verboseOption("-v"); 1712 if (args[i] == verboseOption) { 1713 String8 levelStr(args[i+1]); 1714 int level = atoi(levelStr.string()); 1715 result = String8::format("\nSetting log level to %d.\n", level); 1716 setLogLevel(level); 1717 write(fd, result.string(), result.size()); 1718 } 1719 } 1720 1721 } 1722 return NO_ERROR; 1723 } 1724 1725 /*virtual*/void CameraService::binderDied( 1726 const wp<IBinder> &who) { 1727 1728 /** 1729 * While tempting to promote the wp<IBinder> into a sp, 1730 * it's actually not supported by the binder driver 1731 */ 1732 1733 ALOGV("java clients' binder died"); 1734 1735 sp<BasicClient> cameraClient = getClientByRemote(who); 1736 1737 if (cameraClient == 0) { 1738 ALOGV("java clients' binder death already cleaned up (normal case)"); 1739 return; 1740 } 1741 1742 ALOGW("Disconnecting camera client %p since the binder for it " 1743 "died (this pid %d)", cameraClient.get(), getCallingPid()); 1744 1745 cameraClient->disconnect(); 1746 1747 } 1748 1749 void CameraService::updateStatus(ICameraServiceListener::Status status, 1750 int32_t cameraId, 1751 const StatusVector *rejectSourceStates) { 1752 // do not lock mServiceLock here or can get into a deadlock from 1753 // connect() -> ProClient::disconnect -> updateStatus 1754 Mutex::Autolock lock(mStatusMutex); 1755 1756 ICameraServiceListener::Status oldStatus = mStatusList[cameraId]; 1757 1758 mStatusList[cameraId] = status; 1759 1760 if (oldStatus != status) { 1761 ALOGV("%s: Status has changed for camera ID %d from 0x%x to 0x%x", 1762 __FUNCTION__, cameraId, (uint32_t)oldStatus, (uint32_t)status); 1763 1764 if (oldStatus == ICameraServiceListener::STATUS_NOT_PRESENT && 1765 (status != ICameraServiceListener::STATUS_PRESENT && 1766 status != ICameraServiceListener::STATUS_ENUMERATING)) { 1767 1768 ALOGW("%s: From NOT_PRESENT can only transition into PRESENT" 1769 " or ENUMERATING", __FUNCTION__); 1770 mStatusList[cameraId] = oldStatus; 1771 return; 1772 } 1773 1774 if (rejectSourceStates != NULL) { 1775 const StatusVector &rejectList = *rejectSourceStates; 1776 StatusVector::const_iterator it = rejectList.begin(); 1777 1778 /** 1779 * Sometimes we want to conditionally do a transition. 1780 * For example if a client disconnects, we want to go to PRESENT 1781 * only if we weren't already in NOT_PRESENT or ENUMERATING. 1782 */ 1783 for (; it != rejectList.end(); ++it) { 1784 if (oldStatus == *it) { 1785 ALOGV("%s: Rejecting status transition for Camera ID %d, " 1786 " since the source state was was in one of the bad " 1787 " states.", __FUNCTION__, cameraId); 1788 mStatusList[cameraId] = oldStatus; 1789 return; 1790 } 1791 } 1792 } 1793 1794 /** 1795 * ProClients lose their exclusive lock. 1796 * - Done before the CameraClient can initialize the HAL device, 1797 * since we want to be able to close it before they get to initialize 1798 */ 1799 if (status == ICameraServiceListener::STATUS_NOT_AVAILABLE) { 1800 Vector<wp<ProClient> > proClients(mProClientList[cameraId]); 1801 Vector<wp<ProClient> >::const_iterator it; 1802 1803 for (it = proClients.begin(); it != proClients.end(); ++it) { 1804 sp<ProClient> proCl = it->promote(); 1805 if (proCl.get() != NULL) { 1806 proCl->onExclusiveLockStolen(); 1807 } 1808 } 1809 } 1810 1811 Vector<sp<ICameraServiceListener> >::const_iterator it; 1812 for (it = mListenerList.begin(); it != mListenerList.end(); ++it) { 1813 (*it)->onStatusChanged(status, cameraId); 1814 } 1815 } 1816 } 1817 1818 ICameraServiceListener::Status CameraService::getStatus(int cameraId) const { 1819 if (cameraId < 0 || cameraId >= MAX_CAMERAS) { 1820 ALOGE("%s: Invalid camera ID %d", __FUNCTION__, cameraId); 1821 return ICameraServiceListener::STATUS_UNKNOWN; 1822 } 1823 1824 Mutex::Autolock al(mStatusMutex); 1825 return mStatusList[cameraId]; 1826 } 1827 1828 }; // namespace android 1829
