CameraService.cpp revision 0ed3ec00d0242c9dc77532fe0cf0082645b6662c
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/IPCThreadState.h> 26#include <binder/IServiceManager.h> 27#include <binder/MemoryBase.h> 28#include <binder/MemoryHeapBase.h> 29#include <cutils/atomic.h> 30#include <cutils/properties.h> 31#include <gui/SurfaceTextureClient.h> 32#include <hardware/hardware.h> 33#include <media/AudioSystem.h> 34#include <media/mediaplayer.h> 35#include <surfaceflinger/ISurface.h> 36#include <utils/Errors.h> 37#include <utils/Log.h> 38#include <utils/String16.h> 39 40#include "CameraService.h" 41#include "CameraHardwareInterface.h" 42 43namespace android { 44 45// ---------------------------------------------------------------------------- 46// Logging support -- this is for debugging only 47// Use "adb shell dumpsys media.camera -v 1" to change it. 48static volatile int32_t gLogLevel = 0; 49 50#define LOG1(...) LOGD_IF(gLogLevel >= 1, __VA_ARGS__); 51#define LOG2(...) LOGD_IF(gLogLevel >= 2, __VA_ARGS__); 52 53static void setLogLevel(int level) { 54 android_atomic_write(level, &gLogLevel); 55} 56 57// ---------------------------------------------------------------------------- 58 59static int getCallingPid() { 60 return IPCThreadState::self()->getCallingPid(); 61} 62 63static int getCallingUid() { 64 return IPCThreadState::self()->getCallingUid(); 65} 66 67// ---------------------------------------------------------------------------- 68 69// This is ugly and only safe if we never re-create the CameraService, but 70// should be ok for now. 71static CameraService *gCameraService; 72 73CameraService::CameraService() 74:mSoundRef(0), mModule(0) 75{ 76 LOGI("CameraService started (pid=%d)", getpid()); 77 gCameraService = this; 78} 79 80void CameraService::onFirstRef() 81{ 82 BnCameraService::onFirstRef(); 83 84 if (hw_get_module(CAMERA_HARDWARE_MODULE_ID, 85 (const hw_module_t **)&mModule) < 0) { 86 LOGE("Could not load camera HAL module"); 87 mNumberOfCameras = 0; 88 } 89 else { 90 mNumberOfCameras = mModule->get_number_of_cameras(); 91 if (mNumberOfCameras > MAX_CAMERAS) { 92 LOGE("Number of cameras(%d) > MAX_CAMERAS(%d).", 93 mNumberOfCameras, MAX_CAMERAS); 94 mNumberOfCameras = MAX_CAMERAS; 95 } 96 for (int i = 0; i < mNumberOfCameras; i++) { 97 setCameraFree(i); 98 } 99 } 100} 101 102CameraService::~CameraService() { 103 for (int i = 0; i < mNumberOfCameras; i++) { 104 if (mBusy[i]) { 105 LOGE("camera %d is still in use in destructor!", i); 106 } 107 } 108 109 gCameraService = NULL; 110} 111 112int32_t CameraService::getNumberOfCameras() { 113 return mNumberOfCameras; 114} 115 116status_t CameraService::getCameraInfo(int cameraId, 117 struct CameraInfo* cameraInfo) { 118 if (!mModule) { 119 return NO_INIT; 120 } 121 122 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 123 return BAD_VALUE; 124 } 125 126 struct camera_info info; 127 status_t rc = mModule->get_camera_info(cameraId, &info); 128 cameraInfo->facing = info.facing; 129 cameraInfo->orientation = info.orientation; 130 return rc; 131} 132 133sp<ICamera> CameraService::connect( 134 const sp<ICameraClient>& cameraClient, int cameraId) { 135 int callingPid = getCallingPid(); 136 LOG1("CameraService::connect E (pid %d, id %d)", callingPid, cameraId); 137 138 if (!mModule) { 139 LOGE("Camera HAL module not loaded"); 140 return NULL; 141 } 142 143 sp<Client> client; 144 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 145 LOGE("CameraService::connect X (pid %d) rejected (invalid cameraId %d).", 146 callingPid, cameraId); 147 return NULL; 148 } 149 150 char value[PROPERTY_VALUE_MAX]; 151 property_get("sys.secpolicy.camera.disabled", value, "0"); 152 if (strcmp(value, "1") == 0) { 153 // Camera is disabled by DevicePolicyManager. 154 LOGI("Camera is disabled. connect X (pid %d) rejected", callingPid); 155 return NULL; 156 } 157 158 Mutex::Autolock lock(mServiceLock); 159 if (mClient[cameraId] != 0) { 160 client = mClient[cameraId].promote(); 161 if (client != 0) { 162 if (cameraClient->asBinder() == client->getCameraClient()->asBinder()) { 163 LOG1("CameraService::connect X (pid %d) (the same client)", 164 callingPid); 165 return client; 166 } else { 167 LOGW("CameraService::connect X (pid %d) rejected (existing client).", 168 callingPid); 169 return NULL; 170 } 171 } 172 mClient[cameraId].clear(); 173 } 174 175 if (mBusy[cameraId]) { 176 LOGW("CameraService::connect X (pid %d) rejected" 177 " (camera %d is still busy).", callingPid, cameraId); 178 return NULL; 179 } 180 181 struct camera_info info; 182 if (mModule->get_camera_info(cameraId, &info) != OK) { 183 LOGE("Invalid camera id %d", cameraId); 184 return NULL; 185 } 186 187 char camera_device_name[10]; 188 snprintf(camera_device_name, sizeof(camera_device_name), "%d", cameraId); 189 190 client = new Client(this, cameraClient, 191 new CameraHardwareInterface(&mModule->common, 192 camera_device_name), 193 cameraId, info.facing, callingPid); 194 mClient[cameraId] = client; 195 LOG1("CameraService::connect X"); 196 return client; 197} 198 199void CameraService::removeClient(const sp<ICameraClient>& cameraClient) { 200 int callingPid = getCallingPid(); 201 LOG1("CameraService::removeClient E (pid %d)", callingPid); 202 203 for (int i = 0; i < mNumberOfCameras; i++) { 204 // Declare this before the lock to make absolutely sure the 205 // destructor won't be called with the lock held. 206 sp<Client> client; 207 208 Mutex::Autolock lock(mServiceLock); 209 210 // This happens when we have already disconnected (or this is 211 // just another unused camera). 212 if (mClient[i] == 0) continue; 213 214 // Promote mClient. It can fail if we are called from this path: 215 // Client::~Client() -> disconnect() -> removeClient(). 216 client = mClient[i].promote(); 217 218 if (client == 0) { 219 mClient[i].clear(); 220 continue; 221 } 222 223 if (cameraClient->asBinder() == client->getCameraClient()->asBinder()) { 224 // Found our camera, clear and leave. 225 LOG1("removeClient: clear camera %d", i); 226 mClient[i].clear(); 227 break; 228 } 229 } 230 231 LOG1("CameraService::removeClient X (pid %d)", callingPid); 232} 233 234sp<CameraService::Client> CameraService::getClientById(int cameraId) { 235 if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL; 236 return mClient[cameraId].promote(); 237} 238 239status_t CameraService::onTransact( 240 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) { 241 // Permission checks 242 switch (code) { 243 case BnCameraService::CONNECT: 244 const int pid = getCallingPid(); 245 const int self_pid = getpid(); 246 if (pid != self_pid) { 247 // we're called from a different process, do the real check 248 if (!checkCallingPermission( 249 String16("android.permission.CAMERA"))) { 250 const int uid = getCallingUid(); 251 LOGE("Permission Denial: " 252 "can't use the camera pid=%d, uid=%d", pid, uid); 253 return PERMISSION_DENIED; 254 } 255 } 256 break; 257 } 258 259 return BnCameraService::onTransact(code, data, reply, flags); 260} 261 262// The reason we need this busy bit is a new CameraService::connect() request 263// may come in while the previous Client's destructor has not been run or is 264// still running. If the last strong reference of the previous Client is gone 265// but the destructor has not been finished, we should not allow the new Client 266// to be created because we need to wait for the previous Client to tear down 267// the hardware first. 268void CameraService::setCameraBusy(int cameraId) { 269 android_atomic_write(1, &mBusy[cameraId]); 270} 271 272void CameraService::setCameraFree(int cameraId) { 273 android_atomic_write(0, &mBusy[cameraId]); 274} 275 276// We share the media players for shutter and recording sound for all clients. 277// A reference count is kept to determine when we will actually release the 278// media players. 279 280static MediaPlayer* newMediaPlayer(const char *file) { 281 MediaPlayer* mp = new MediaPlayer(); 282 if (mp->setDataSource(file, NULL) == NO_ERROR) { 283 mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE); 284 mp->prepare(); 285 } else { 286 LOGE("Failed to load CameraService sounds: %s", file); 287 return NULL; 288 } 289 return mp; 290} 291 292void CameraService::loadSound() { 293 Mutex::Autolock lock(mSoundLock); 294 LOG1("CameraService::loadSound ref=%d", mSoundRef); 295 if (mSoundRef++) return; 296 297 mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg"); 298 mSoundPlayer[SOUND_RECORDING] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg"); 299} 300 301void CameraService::releaseSound() { 302 Mutex::Autolock lock(mSoundLock); 303 LOG1("CameraService::releaseSound ref=%d", mSoundRef); 304 if (--mSoundRef) return; 305 306 for (int i = 0; i < NUM_SOUNDS; i++) { 307 if (mSoundPlayer[i] != 0) { 308 mSoundPlayer[i]->disconnect(); 309 mSoundPlayer[i].clear(); 310 } 311 } 312} 313 314void CameraService::playSound(sound_kind kind) { 315 LOG1("playSound(%d)", kind); 316 Mutex::Autolock lock(mSoundLock); 317 sp<MediaPlayer> player = mSoundPlayer[kind]; 318 if (player != 0) { 319 // do not play the sound if stream volume is 0 320 // (typically because ringer mode is silent). 321 int index; 322 AudioSystem::getStreamVolumeIndex(AUDIO_STREAM_ENFORCED_AUDIBLE, &index); 323 if (index != 0) { 324 player->seekTo(0); 325 player->start(); 326 } 327 } 328} 329 330// ---------------------------------------------------------------------------- 331 332CameraService::Client::Client(const sp<CameraService>& cameraService, 333 const sp<ICameraClient>& cameraClient, 334 const sp<CameraHardwareInterface>& hardware, 335 int cameraId, int cameraFacing, int clientPid) { 336 int callingPid = getCallingPid(); 337 LOG1("Client::Client E (pid %d)", callingPid); 338 339 mCameraService = cameraService; 340 mCameraClient = cameraClient; 341 mHardware = hardware; 342 mCameraId = cameraId; 343 mCameraFacing = cameraFacing; 344 mClientPid = clientPid; 345 mMsgEnabled = 0; 346 mSurface = 0; 347 mPreviewWindow = 0; 348 mHardware->setCallbacks(notifyCallback, 349 dataCallback, 350 dataCallbackTimestamp, 351 (void *)cameraId); 352 353 // Enable zoom, error, and focus messages by default 354 enableMsgType(CAMERA_MSG_ERROR | 355 CAMERA_MSG_ZOOM | 356 CAMERA_MSG_FOCUS); 357 358 // Callback is disabled by default 359 mPreviewCallbackFlag = CAMERA_FRAME_CALLBACK_FLAG_NOOP; 360 mOrientation = getOrientation(0, mCameraFacing == CAMERA_FACING_FRONT); 361 mPlayShutterSound = true; 362 cameraService->setCameraBusy(cameraId); 363 cameraService->loadSound(); 364 LOG1("Client::Client X (pid %d)", callingPid); 365} 366 367// tear down the client 368CameraService::Client::~Client() { 369 int callingPid = getCallingPid(); 370 LOG1("Client::~Client E (pid %d, this %p)", callingPid, this); 371 372 // set mClientPid to let disconnet() tear down the hardware 373 mClientPid = callingPid; 374 disconnect(); 375 mCameraService->releaseSound(); 376 LOG1("Client::~Client X (pid %d, this %p)", callingPid, this); 377} 378 379// ---------------------------------------------------------------------------- 380 381status_t CameraService::Client::checkPid() const { 382 int callingPid = getCallingPid(); 383 if (callingPid == mClientPid) return NO_ERROR; 384 385 LOGW("attempt to use a locked camera from a different process" 386 " (old pid %d, new pid %d)", mClientPid, callingPid); 387 return EBUSY; 388} 389 390status_t CameraService::Client::checkPidAndHardware() const { 391 status_t result = checkPid(); 392 if (result != NO_ERROR) return result; 393 if (mHardware == 0) { 394 LOGE("attempt to use a camera after disconnect() (pid %d)", getCallingPid()); 395 return INVALID_OPERATION; 396 } 397 return NO_ERROR; 398} 399 400status_t CameraService::Client::lock() { 401 int callingPid = getCallingPid(); 402 LOG1("lock (pid %d)", callingPid); 403 Mutex::Autolock lock(mLock); 404 405 // lock camera to this client if the the camera is unlocked 406 if (mClientPid == 0) { 407 mClientPid = callingPid; 408 return NO_ERROR; 409 } 410 411 // returns NO_ERROR if the client already owns the camera, EBUSY otherwise 412 return checkPid(); 413} 414 415status_t CameraService::Client::unlock() { 416 int callingPid = getCallingPid(); 417 LOG1("unlock (pid %d)", callingPid); 418 Mutex::Autolock lock(mLock); 419 420 // allow anyone to use camera (after they lock the camera) 421 status_t result = checkPid(); 422 if (result == NO_ERROR) { 423 if (mHardware->recordingEnabled()) { 424 LOGE("Not allowed to unlock camera during recording."); 425 return INVALID_OPERATION; 426 } 427 mClientPid = 0; 428 LOG1("clear mCameraClient (pid %d)", callingPid); 429 // we need to remove the reference to ICameraClient so that when the app 430 // goes away, the reference count goes to 0. 431 mCameraClient.clear(); 432 } 433 return result; 434} 435 436// connect a new client to the camera 437status_t CameraService::Client::connect(const sp<ICameraClient>& client) { 438 int callingPid = getCallingPid(); 439 LOG1("connect E (pid %d)", callingPid); 440 Mutex::Autolock lock(mLock); 441 442 if (mClientPid != 0 && checkPid() != NO_ERROR) { 443 LOGW("Tried to connect to a locked camera (old pid %d, new pid %d)", 444 mClientPid, callingPid); 445 return EBUSY; 446 } 447 448 if (mCameraClient != 0 && (client->asBinder() == mCameraClient->asBinder())) { 449 LOG1("Connect to the same client"); 450 return NO_ERROR; 451 } 452 453 mPreviewCallbackFlag = CAMERA_FRAME_CALLBACK_FLAG_NOOP; 454 mClientPid = callingPid; 455 mCameraClient = client; 456 457 LOG1("connect X (pid %d)", callingPid); 458 return NO_ERROR; 459} 460 461void CameraService::Client::disconnect() { 462 int callingPid = getCallingPid(); 463 LOG1("disconnect E (pid %d)", callingPid); 464 Mutex::Autolock lock(mLock); 465 466 if (checkPid() != NO_ERROR) { 467 LOGW("different client - don't disconnect"); 468 return; 469 } 470 471 if (mClientPid <= 0) { 472 LOG1("camera is unlocked (mClientPid = %d), don't tear down hardware", mClientPid); 473 return; 474 } 475 476 // Make sure disconnect() is done once and once only, whether it is called 477 // from the user directly, or called by the destructor. 478 if (mHardware == 0) return; 479 480 LOG1("hardware teardown"); 481 // Before destroying mHardware, we must make sure it's in the 482 // idle state. 483 // Turn off all messages. 484 disableMsgType(CAMERA_MSG_ALL_MSGS); 485 mHardware->stopPreview(); 486 mHardware->cancelPicture(); 487 // Release the hardware resources. 488 mHardware->release(); 489 490 // Release the held ANativeWindow resources. 491 if (mPreviewWindow != 0) { 492 mPreviewWindow = 0; 493 mHardware->setPreviewWindow(mPreviewWindow); 494 } 495 mHardware.clear(); 496 497 mCameraService->removeClient(mCameraClient); 498 mCameraService->setCameraFree(mCameraId); 499 500 LOG1("disconnect X (pid %d)", callingPid); 501} 502 503// ---------------------------------------------------------------------------- 504 505static void disconnectWindow(const sp<ANativeWindow>& window) { 506 if (window != 0) { 507 status_t result = native_window_disconnect(window.get(), 508 NATIVE_WINDOW_API_CAMERA); 509 if (result != NO_ERROR) { 510 LOGW("native_window_disconnect failed: %s (%d)", strerror(-result), 511 result); 512 } 513 } 514} 515 516status_t CameraService::Client::setPreviewWindow(const sp<IBinder>& binder, 517 const sp<ANativeWindow>& window) { 518 Mutex::Autolock lock(mLock); 519 status_t result = checkPidAndHardware(); 520 if (result != NO_ERROR) return result; 521 522 // return if no change in surface. 523 if (binder == mSurface) { 524 return NO_ERROR; 525 } 526 527 if (window != 0) { 528 result = native_window_connect(window.get(), NATIVE_WINDOW_API_CAMERA); 529 if (result != NO_ERROR) { 530 LOGE("native_window_connect failed: %s (%d)", strerror(-result), 531 result); 532 return result; 533 } 534 } 535 536 // If preview has been already started, register preview buffers now. 537 if (mHardware->previewEnabled()) { 538 if (window != 0) { 539 native_window_set_buffers_transform(window.get(), mOrientation); 540 result = mHardware->setPreviewWindow(window); 541 } 542 } 543 544 if (result == NO_ERROR) { 545 // Everything has succeeded. Disconnect the old window and remember the 546 // new window. 547 disconnectWindow(mPreviewWindow); 548 mSurface = binder; 549 mPreviewWindow = window; 550 } else { 551 // Something went wrong after we connected to the new window, so 552 // disconnect here. 553 disconnectWindow(window); 554 } 555 556 return result; 557} 558 559// set the Surface that the preview will use 560status_t CameraService::Client::setPreviewDisplay(const sp<Surface>& surface) { 561 LOG1("setPreviewDisplay(%p) (pid %d)", surface.get(), getCallingPid()); 562 563 sp<IBinder> binder(surface != 0 ? surface->asBinder() : 0); 564 sp<ANativeWindow> window(surface); 565 return setPreviewWindow(binder, window); 566} 567 568// set the SurfaceTexture that the preview will use 569status_t CameraService::Client::setPreviewTexture( 570 const sp<ISurfaceTexture>& surfaceTexture) { 571 LOG1("setPreviewTexture(%p) (pid %d)", surfaceTexture.get(), 572 getCallingPid()); 573 574 sp<IBinder> binder; 575 sp<ANativeWindow> window; 576 if (surfaceTexture != 0) { 577 binder = surfaceTexture->asBinder(); 578 window = new SurfaceTextureClient(surfaceTexture); 579 } 580 return setPreviewWindow(binder, window); 581} 582 583// set the preview callback flag to affect how the received frames from 584// preview are handled. 585void CameraService::Client::setPreviewCallbackFlag(int callback_flag) { 586 LOG1("setPreviewCallbackFlag(%d) (pid %d)", callback_flag, getCallingPid()); 587 Mutex::Autolock lock(mLock); 588 if (checkPidAndHardware() != NO_ERROR) return; 589 590 mPreviewCallbackFlag = callback_flag; 591 if (mPreviewCallbackFlag & CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK) { 592 enableMsgType(CAMERA_MSG_PREVIEW_FRAME); 593 } else { 594 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 595 } 596} 597 598// start preview mode 599status_t CameraService::Client::startPreview() { 600 LOG1("startPreview (pid %d)", getCallingPid()); 601 return startCameraMode(CAMERA_PREVIEW_MODE); 602} 603 604// start recording mode 605status_t CameraService::Client::startRecording() { 606 LOG1("startRecording (pid %d)", getCallingPid()); 607 return startCameraMode(CAMERA_RECORDING_MODE); 608} 609 610// start preview or recording 611status_t CameraService::Client::startCameraMode(camera_mode mode) { 612 LOG1("startCameraMode(%d)", mode); 613 Mutex::Autolock lock(mLock); 614 status_t result = checkPidAndHardware(); 615 if (result != NO_ERROR) return result; 616 617 switch(mode) { 618 case CAMERA_PREVIEW_MODE: 619 if (mSurface == 0 && mPreviewWindow == 0) { 620 LOG1("mSurface is not set yet."); 621 // still able to start preview in this case. 622 } 623 return startPreviewMode(); 624 case CAMERA_RECORDING_MODE: 625 if (mSurface == 0 && mPreviewWindow == 0) { 626 LOGE("mSurface or mPreviewWindow must be set before startRecordingMode."); 627 return INVALID_OPERATION; 628 } 629 return startRecordingMode(); 630 default: 631 return UNKNOWN_ERROR; 632 } 633} 634 635status_t CameraService::Client::startPreviewMode() { 636 LOG1("startPreviewMode"); 637 status_t result = NO_ERROR; 638 639 // if preview has been enabled, nothing needs to be done 640 if (mHardware->previewEnabled()) { 641 return NO_ERROR; 642 } 643 644 if (mPreviewWindow != 0) { 645 native_window_set_buffers_transform(mPreviewWindow.get(), 646 mOrientation); 647 } 648 mHardware->setPreviewWindow(mPreviewWindow); 649 result = mHardware->startPreview(); 650 651 return result; 652} 653 654status_t CameraService::Client::startRecordingMode() { 655 LOG1("startRecordingMode"); 656 status_t result = NO_ERROR; 657 658 // if recording has been enabled, nothing needs to be done 659 if (mHardware->recordingEnabled()) { 660 return NO_ERROR; 661 } 662 663 // if preview has not been started, start preview first 664 if (!mHardware->previewEnabled()) { 665 result = startPreviewMode(); 666 if (result != NO_ERROR) { 667 return result; 668 } 669 } 670 671 // start recording mode 672 enableMsgType(CAMERA_MSG_VIDEO_FRAME); 673 mCameraService->playSound(SOUND_RECORDING); 674 result = mHardware->startRecording(); 675 if (result != NO_ERROR) { 676 LOGE("mHardware->startRecording() failed with status %d", result); 677 } 678 return result; 679} 680 681// stop preview mode 682void CameraService::Client::stopPreview() { 683 LOG1("stopPreview (pid %d)", getCallingPid()); 684 Mutex::Autolock lock(mLock); 685 if (checkPidAndHardware() != NO_ERROR) return; 686 687 688 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 689 mHardware->stopPreview(); 690 691 mPreviewBuffer.clear(); 692} 693 694// stop recording mode 695void CameraService::Client::stopRecording() { 696 LOG1("stopRecording (pid %d)", getCallingPid()); 697 Mutex::Autolock lock(mLock); 698 if (checkPidAndHardware() != NO_ERROR) return; 699 700 mCameraService->playSound(SOUND_RECORDING); 701 disableMsgType(CAMERA_MSG_VIDEO_FRAME); 702 mHardware->stopRecording(); 703 704 mPreviewBuffer.clear(); 705} 706 707// release a recording frame 708void CameraService::Client::releaseRecordingFrame(const sp<IMemory>& mem) { 709 Mutex::Autolock lock(mLock); 710 if (checkPidAndHardware() != NO_ERROR) return; 711 mHardware->releaseRecordingFrame(mem); 712} 713 714status_t CameraService::Client::storeMetaDataInBuffers(bool enabled) 715{ 716 LOG1("storeMetaDataInBuffers: %s", enabled? "true": "false"); 717 Mutex::Autolock lock(mLock); 718 if (checkPidAndHardware() != NO_ERROR) { 719 return UNKNOWN_ERROR; 720 } 721 return mHardware->storeMetaDataInBuffers(enabled); 722} 723 724bool CameraService::Client::previewEnabled() { 725 LOG1("previewEnabled (pid %d)", getCallingPid()); 726 727 Mutex::Autolock lock(mLock); 728 if (checkPidAndHardware() != NO_ERROR) return false; 729 return mHardware->previewEnabled(); 730} 731 732bool CameraService::Client::recordingEnabled() { 733 LOG1("recordingEnabled (pid %d)", getCallingPid()); 734 735 Mutex::Autolock lock(mLock); 736 if (checkPidAndHardware() != NO_ERROR) return false; 737 return mHardware->recordingEnabled(); 738} 739 740status_t CameraService::Client::autoFocus() { 741 LOG1("autoFocus (pid %d)", getCallingPid()); 742 743 Mutex::Autolock lock(mLock); 744 status_t result = checkPidAndHardware(); 745 if (result != NO_ERROR) return result; 746 747 return mHardware->autoFocus(); 748} 749 750status_t CameraService::Client::cancelAutoFocus() { 751 LOG1("cancelAutoFocus (pid %d)", getCallingPid()); 752 753 Mutex::Autolock lock(mLock); 754 status_t result = checkPidAndHardware(); 755 if (result != NO_ERROR) return result; 756 757 return mHardware->cancelAutoFocus(); 758} 759 760// take a picture - image is returned in callback 761status_t CameraService::Client::takePicture(int msgType) { 762 LOG1("takePicture (pid %d): 0x%x", getCallingPid(), msgType); 763 764 Mutex::Autolock lock(mLock); 765 status_t result = checkPidAndHardware(); 766 if (result != NO_ERROR) return result; 767 768 if (mHardware->recordingEnabled()) { 769 LOGE("Cannot take picture during recording."); 770 return INVALID_OPERATION; 771 } 772 773 if ((msgType & CAMERA_MSG_RAW_IMAGE) && 774 (msgType & CAMERA_MSG_RAW_IMAGE_NOTIFY)) { 775 LOGE("CAMERA_MSG_RAW_IMAGE and CAMERA_MSG_RAW_IMAGE_NOTIFY" 776 " cannot be both enabled"); 777 return BAD_VALUE; 778 } 779 780 // We only accept picture related message types 781 // and ignore other types of messages for takePicture(). 782 int picMsgType = msgType 783 & (CAMERA_MSG_SHUTTER | 784 CAMERA_MSG_POSTVIEW_FRAME | 785 CAMERA_MSG_RAW_IMAGE | 786 CAMERA_MSG_RAW_IMAGE_NOTIFY | 787 CAMERA_MSG_COMPRESSED_IMAGE); 788 789 enableMsgType(picMsgType); 790 791 return mHardware->takePicture(); 792} 793 794// set preview/capture parameters - key/value pairs 795status_t CameraService::Client::setParameters(const String8& params) { 796 LOG1("setParameters (pid %d) (%s)", getCallingPid(), params.string()); 797 798 Mutex::Autolock lock(mLock); 799 status_t result = checkPidAndHardware(); 800 if (result != NO_ERROR) return result; 801 802 CameraParameters p(params); 803 return mHardware->setParameters(p); 804} 805 806// get preview/capture parameters - key/value pairs 807String8 CameraService::Client::getParameters() const { 808 Mutex::Autolock lock(mLock); 809 if (checkPidAndHardware() != NO_ERROR) return String8(); 810 811 String8 params(mHardware->getParameters().flatten()); 812 LOG1("getParameters (pid %d) (%s)", getCallingPid(), params.string()); 813 return params; 814} 815 816// enable shutter sound 817status_t CameraService::Client::enableShutterSound(bool enable) { 818 LOG1("enableShutterSound (pid %d)", getCallingPid()); 819 820 status_t result = checkPidAndHardware(); 821 if (result != NO_ERROR) return result; 822 823 if (enable) { 824 mPlayShutterSound = true; 825 return OK; 826 } 827 828 // Disabling shutter sound may not be allowed. In that case only 829 // allow the mediaserver process to disable the sound. 830 char value[PROPERTY_VALUE_MAX]; 831 property_get("ro.camera.sound.forced", value, "0"); 832 if (strcmp(value, "0") != 0) { 833 // Disabling shutter sound is not allowed. Deny if the current 834 // process is not mediaserver. 835 if (getCallingPid() != getpid()) { 836 LOGE("Failed to disable shutter sound. Permission denied (pid %d)", getCallingPid()); 837 return PERMISSION_DENIED; 838 } 839 } 840 841 mPlayShutterSound = false; 842 return OK; 843} 844 845status_t CameraService::Client::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) { 846 LOG1("sendCommand (pid %d)", getCallingPid()); 847 int orientation; 848 Mutex::Autolock lock(mLock); 849 status_t result = checkPidAndHardware(); 850 if (result != NO_ERROR) return result; 851 852 if (cmd == CAMERA_CMD_SET_DISPLAY_ORIENTATION) { 853 // The orientation cannot be set during preview. 854 if (mHardware->previewEnabled()) { 855 return INVALID_OPERATION; 856 } 857 // Mirror the preview if the camera is front-facing. 858 orientation = getOrientation(arg1, mCameraFacing == CAMERA_FACING_FRONT); 859 if (orientation == -1) return BAD_VALUE; 860 861 if (mOrientation != orientation) { 862 mOrientation = orientation; 863 } 864 return OK; 865 } else if (cmd == CAMERA_CMD_ENABLE_SHUTTER_SOUND) { 866 switch (arg1) { 867 case 0: 868 enableShutterSound(false); 869 break; 870 case 1: 871 enableShutterSound(true); 872 break; 873 default: 874 return BAD_VALUE; 875 } 876 return OK; 877 } else if (cmd == CAMERA_CMD_PLAY_RECORDING_SOUND) { 878 mCameraService->playSound(SOUND_RECORDING); 879 } 880 881 return mHardware->sendCommand(cmd, arg1, arg2); 882} 883 884// ---------------------------------------------------------------------------- 885 886void CameraService::Client::enableMsgType(int32_t msgType) { 887 android_atomic_or(msgType, &mMsgEnabled); 888 mHardware->enableMsgType(msgType); 889} 890 891void CameraService::Client::disableMsgType(int32_t msgType) { 892 android_atomic_and(~msgType, &mMsgEnabled); 893 mHardware->disableMsgType(msgType); 894} 895 896#define CHECK_MESSAGE_INTERVAL 10 // 10ms 897bool CameraService::Client::lockIfMessageWanted(int32_t msgType) { 898 int sleepCount = 0; 899 while (mMsgEnabled & msgType) { 900 if (mLock.tryLock() == NO_ERROR) { 901 if (sleepCount > 0) { 902 LOG1("lockIfMessageWanted(%d): waited for %d ms", 903 msgType, sleepCount * CHECK_MESSAGE_INTERVAL); 904 } 905 return true; 906 } 907 if (sleepCount++ == 0) { 908 LOG1("lockIfMessageWanted(%d): enter sleep", msgType); 909 } 910 usleep(CHECK_MESSAGE_INTERVAL * 1000); 911 } 912 LOGW("lockIfMessageWanted(%d): dropped unwanted message", msgType); 913 return false; 914} 915 916// ---------------------------------------------------------------------------- 917 918// Converts from a raw pointer to the client to a strong pointer during a 919// hardware callback. This requires the callbacks only happen when the client 920// is still alive. 921sp<CameraService::Client> CameraService::Client::getClientFromCookie(void* user) { 922 sp<Client> client = gCameraService->getClientById((int) user); 923 924 // This could happen if the Client is in the process of shutting down (the 925 // last strong reference is gone, but the destructor hasn't finished 926 // stopping the hardware). 927 if (client == 0) return NULL; 928 929 // The checks below are not necessary and are for debugging only. 930 if (client->mCameraService.get() != gCameraService) { 931 LOGE("mismatch service!"); 932 return NULL; 933 } 934 935 if (client->mHardware == 0) { 936 LOGE("mHardware == 0: callback after disconnect()?"); 937 return NULL; 938 } 939 940 return client; 941} 942 943// Callback messages can be dispatched to internal handlers or pass to our 944// client's callback functions, depending on the message type. 945// 946// notifyCallback: 947// CAMERA_MSG_SHUTTER handleShutter 948// (others) c->notifyCallback 949// dataCallback: 950// CAMERA_MSG_PREVIEW_FRAME handlePreviewData 951// CAMERA_MSG_POSTVIEW_FRAME handlePostview 952// CAMERA_MSG_RAW_IMAGE handleRawPicture 953// CAMERA_MSG_COMPRESSED_IMAGE handleCompressedPicture 954// (others) c->dataCallback 955// dataCallbackTimestamp 956// (others) c->dataCallbackTimestamp 957// 958// NOTE: the *Callback functions grab mLock of the client before passing 959// control to handle* functions. So the handle* functions must release the 960// lock before calling the ICameraClient's callbacks, so those callbacks can 961// invoke methods in the Client class again (For example, the preview frame 962// callback may want to releaseRecordingFrame). The handle* functions must 963// release the lock after all accesses to member variables, so it must be 964// handled very carefully. 965 966void CameraService::Client::notifyCallback(int32_t msgType, int32_t ext1, 967 int32_t ext2, void* user) { 968 LOG2("notifyCallback(%d)", msgType); 969 970 sp<Client> client = getClientFromCookie(user); 971 if (client == 0) return; 972 if (!client->lockIfMessageWanted(msgType)) return; 973 974 switch (msgType) { 975 case CAMERA_MSG_SHUTTER: 976 // ext1 is the dimension of the yuv picture. 977 client->handleShutter(); 978 break; 979 default: 980 client->handleGenericNotify(msgType, ext1, ext2); 981 break; 982 } 983} 984 985void CameraService::Client::dataCallback(int32_t msgType, 986 const sp<IMemory>& dataPtr, void* user) { 987 LOG2("dataCallback(%d)", msgType); 988 989 sp<Client> client = getClientFromCookie(user); 990 if (client == 0) return; 991 if (!client->lockIfMessageWanted(msgType)) return; 992 993 if (dataPtr == 0) { 994 LOGE("Null data returned in data callback"); 995 client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); 996 return; 997 } 998 999 switch (msgType) { 1000 case CAMERA_MSG_PREVIEW_FRAME: 1001 client->handlePreviewData(dataPtr); 1002 break; 1003 case CAMERA_MSG_POSTVIEW_FRAME: 1004 client->handlePostview(dataPtr); 1005 break; 1006 case CAMERA_MSG_RAW_IMAGE: 1007 client->handleRawPicture(dataPtr); 1008 break; 1009 case CAMERA_MSG_COMPRESSED_IMAGE: 1010 client->handleCompressedPicture(dataPtr); 1011 break; 1012 default: 1013 client->handleGenericData(msgType, dataPtr); 1014 break; 1015 } 1016} 1017 1018void CameraService::Client::dataCallbackTimestamp(nsecs_t timestamp, 1019 int32_t msgType, const sp<IMemory>& dataPtr, void* user) { 1020 LOG2("dataCallbackTimestamp(%d)", msgType); 1021 1022 sp<Client> client = getClientFromCookie(user); 1023 if (client == 0) return; 1024 if (!client->lockIfMessageWanted(msgType)) return; 1025 1026 if (dataPtr == 0) { 1027 LOGE("Null data returned in data with timestamp callback"); 1028 client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); 1029 return; 1030 } 1031 1032 client->handleGenericDataTimestamp(timestamp, msgType, dataPtr); 1033} 1034 1035// snapshot taken callback 1036void CameraService::Client::handleShutter(void) { 1037 if (mPlayShutterSound) { 1038 mCameraService->playSound(SOUND_SHUTTER); 1039 } 1040 1041 sp<ICameraClient> c = mCameraClient; 1042 if (c != 0) { 1043 mLock.unlock(); 1044 c->notifyCallback(CAMERA_MSG_SHUTTER, 0, 0); 1045 if (!lockIfMessageWanted(CAMERA_MSG_SHUTTER)) return; 1046 } 1047 disableMsgType(CAMERA_MSG_SHUTTER); 1048 1049 mLock.unlock(); 1050} 1051 1052// preview callback - frame buffer update 1053void CameraService::Client::handlePreviewData(const sp<IMemory>& mem) { 1054 ssize_t offset; 1055 size_t size; 1056 sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); 1057 1058 // local copy of the callback flags 1059 int flags = mPreviewCallbackFlag; 1060 1061 // is callback enabled? 1062 if (!(flags & CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK)) { 1063 // If the enable bit is off, the copy-out and one-shot bits are ignored 1064 LOG2("frame callback is disabled"); 1065 mLock.unlock(); 1066 return; 1067 } 1068 1069 // hold a strong pointer to the client 1070 sp<ICameraClient> c = mCameraClient; 1071 1072 // clear callback flags if no client or one-shot mode 1073 if (c == 0 || (mPreviewCallbackFlag & CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK)) { 1074 LOG2("Disable preview callback"); 1075 mPreviewCallbackFlag &= ~(CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK | 1076 CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK | 1077 CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK); 1078 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 1079 } 1080 1081 if (c != 0) { 1082 // Is the received frame copied out or not? 1083 if (flags & CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK) { 1084 LOG2("frame is copied"); 1085 copyFrameAndPostCopiedFrame(c, heap, offset, size); 1086 } else { 1087 LOG2("frame is forwarded"); 1088 mLock.unlock(); 1089 c->dataCallback(CAMERA_MSG_PREVIEW_FRAME, mem); 1090 } 1091 } else { 1092 mLock.unlock(); 1093 } 1094} 1095 1096// picture callback - postview image ready 1097void CameraService::Client::handlePostview(const sp<IMemory>& mem) { 1098 disableMsgType(CAMERA_MSG_POSTVIEW_FRAME); 1099 1100 sp<ICameraClient> c = mCameraClient; 1101 mLock.unlock(); 1102 if (c != 0) { 1103 c->dataCallback(CAMERA_MSG_POSTVIEW_FRAME, mem); 1104 } 1105} 1106 1107// picture callback - raw image ready 1108void CameraService::Client::handleRawPicture(const sp<IMemory>& mem) { 1109 disableMsgType(CAMERA_MSG_RAW_IMAGE); 1110 1111 ssize_t offset; 1112 size_t size; 1113 sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); 1114 1115 sp<ICameraClient> c = mCameraClient; 1116 mLock.unlock(); 1117 if (c != 0) { 1118 c->dataCallback(CAMERA_MSG_RAW_IMAGE, mem); 1119 } 1120} 1121 1122// picture callback - compressed picture ready 1123void CameraService::Client::handleCompressedPicture(const sp<IMemory>& mem) { 1124 disableMsgType(CAMERA_MSG_COMPRESSED_IMAGE); 1125 1126 sp<ICameraClient> c = mCameraClient; 1127 mLock.unlock(); 1128 if (c != 0) { 1129 c->dataCallback(CAMERA_MSG_COMPRESSED_IMAGE, mem); 1130 } 1131} 1132 1133 1134void CameraService::Client::handleGenericNotify(int32_t msgType, 1135 int32_t ext1, int32_t ext2) { 1136 sp<ICameraClient> c = mCameraClient; 1137 mLock.unlock(); 1138 if (c != 0) { 1139 c->notifyCallback(msgType, ext1, ext2); 1140 } 1141} 1142 1143void CameraService::Client::handleGenericData(int32_t msgType, 1144 const sp<IMemory>& dataPtr) { 1145 sp<ICameraClient> c = mCameraClient; 1146 mLock.unlock(); 1147 if (c != 0) { 1148 c->dataCallback(msgType, dataPtr); 1149 } 1150} 1151 1152void CameraService::Client::handleGenericDataTimestamp(nsecs_t timestamp, 1153 int32_t msgType, const sp<IMemory>& dataPtr) { 1154 sp<ICameraClient> c = mCameraClient; 1155 mLock.unlock(); 1156 if (c != 0) { 1157 c->dataCallbackTimestamp(timestamp, msgType, dataPtr); 1158 } 1159} 1160 1161void CameraService::Client::copyFrameAndPostCopiedFrame( 1162 const sp<ICameraClient>& client, const sp<IMemoryHeap>& heap, 1163 size_t offset, size_t size) { 1164 LOG2("copyFrameAndPostCopiedFrame"); 1165 // It is necessary to copy out of pmem before sending this to 1166 // the callback. For efficiency, reuse the same MemoryHeapBase 1167 // provided it's big enough. Don't allocate the memory or 1168 // perform the copy if there's no callback. 1169 // hold the preview lock while we grab a reference to the preview buffer 1170 sp<MemoryHeapBase> previewBuffer; 1171 1172 if (mPreviewBuffer == 0) { 1173 mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); 1174 } else if (size > mPreviewBuffer->virtualSize()) { 1175 mPreviewBuffer.clear(); 1176 mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); 1177 } 1178 if (mPreviewBuffer == 0) { 1179 LOGE("failed to allocate space for preview buffer"); 1180 mLock.unlock(); 1181 return; 1182 } 1183 previewBuffer = mPreviewBuffer; 1184 1185 memcpy(previewBuffer->base(), (uint8_t *)heap->base() + offset, size); 1186 1187 sp<MemoryBase> frame = new MemoryBase(previewBuffer, 0, size); 1188 if (frame == 0) { 1189 LOGE("failed to allocate space for frame callback"); 1190 mLock.unlock(); 1191 return; 1192 } 1193 1194 mLock.unlock(); 1195 client->dataCallback(CAMERA_MSG_PREVIEW_FRAME, frame); 1196} 1197 1198int CameraService::Client::getOrientation(int degrees, bool mirror) { 1199 if (!mirror) { 1200 if (degrees == 0) return 0; 1201 else if (degrees == 90) return HAL_TRANSFORM_ROT_90; 1202 else if (degrees == 180) return HAL_TRANSFORM_ROT_180; 1203 else if (degrees == 270) return HAL_TRANSFORM_ROT_270; 1204 } else { // Do mirror (horizontal flip) 1205 if (degrees == 0) { // FLIP_H and ROT_0 1206 return HAL_TRANSFORM_FLIP_H; 1207 } else if (degrees == 90) { // FLIP_H and ROT_90 1208 return HAL_TRANSFORM_FLIP_H | HAL_TRANSFORM_ROT_90; 1209 } else if (degrees == 180) { // FLIP_H and ROT_180 1210 return HAL_TRANSFORM_FLIP_V; 1211 } else if (degrees == 270) { // FLIP_H and ROT_270 1212 return HAL_TRANSFORM_FLIP_V | HAL_TRANSFORM_ROT_90; 1213 } 1214 } 1215 LOGE("Invalid setDisplayOrientation degrees=%d", degrees); 1216 return -1; 1217} 1218 1219 1220// ---------------------------------------------------------------------------- 1221 1222static const int kDumpLockRetries = 50; 1223static const int kDumpLockSleep = 60000; 1224 1225static bool tryLock(Mutex& mutex) 1226{ 1227 bool locked = false; 1228 for (int i = 0; i < kDumpLockRetries; ++i) { 1229 if (mutex.tryLock() == NO_ERROR) { 1230 locked = true; 1231 break; 1232 } 1233 usleep(kDumpLockSleep); 1234 } 1235 return locked; 1236} 1237 1238status_t CameraService::dump(int fd, const Vector<String16>& args) { 1239 static const char* kDeadlockedString = "CameraService may be deadlocked\n"; 1240 1241 const size_t SIZE = 256; 1242 char buffer[SIZE]; 1243 String8 result; 1244 if (checkCallingPermission(String16("android.permission.DUMP")) == false) { 1245 snprintf(buffer, SIZE, "Permission Denial: " 1246 "can't dump CameraService from pid=%d, uid=%d\n", 1247 getCallingPid(), 1248 getCallingUid()); 1249 result.append(buffer); 1250 write(fd, result.string(), result.size()); 1251 } else { 1252 bool locked = tryLock(mServiceLock); 1253 // failed to lock - CameraService is probably deadlocked 1254 if (!locked) { 1255 String8 result(kDeadlockedString); 1256 write(fd, result.string(), result.size()); 1257 } 1258 1259 bool hasClient = false; 1260 for (int i = 0; i < mNumberOfCameras; i++) { 1261 sp<Client> client = mClient[i].promote(); 1262 if (client == 0) continue; 1263 hasClient = true; 1264 sprintf(buffer, "Client[%d] (%p) PID: %d\n", 1265 i, 1266 client->getCameraClient()->asBinder().get(), 1267 client->mClientPid); 1268 result.append(buffer); 1269 write(fd, result.string(), result.size()); 1270 client->mHardware->dump(fd, args); 1271 } 1272 if (!hasClient) { 1273 result.append("No camera client yet.\n"); 1274 write(fd, result.string(), result.size()); 1275 } 1276 1277 if (locked) mServiceLock.unlock(); 1278 1279 // change logging level 1280 int n = args.size(); 1281 for (int i = 0; i + 1 < n; i++) { 1282 if (args[i] == String16("-v")) { 1283 String8 levelStr(args[i+1]); 1284 int level = atoi(levelStr.string()); 1285 sprintf(buffer, "Set Log Level to %d", level); 1286 result.append(buffer); 1287 setLogLevel(level); 1288 } 1289 } 1290 } 1291 return NO_ERROR; 1292} 1293 1294}; // namespace android 1295