CameraService.cpp revision 986ef2ad4c96952711d87af481f3afb40aa10775
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 20#include <stdio.h> 21#include <sys/types.h> 22#include <pthread.h> 23 24#include <binder/IPCThreadState.h> 25#include <binder/IServiceManager.h> 26#include <binder/MemoryBase.h> 27#include <binder/MemoryHeapBase.h> 28#include <cutils/atomic.h> 29#include <cutils/properties.h> 30#include <hardware/hardware.h> 31#include <media/AudioSystem.h> 32#include <media/mediaplayer.h> 33#include <surfaceflinger/ISurface.h> 34#include <utils/Errors.h> 35#include <utils/Log.h> 36#include <utils/String16.h> 37 38#include "CameraService.h" 39 40namespace android { 41 42// ---------------------------------------------------------------------------- 43// Logging support -- this is for debugging only 44// Use "adb shell dumpsys media.camera -v 1" to change it. 45static volatile int32_t gLogLevel = 0; 46 47#define LOG1(...) LOGD_IF(gLogLevel >= 1, __VA_ARGS__); 48#define LOG2(...) LOGD_IF(gLogLevel >= 2, __VA_ARGS__); 49 50static void setLogLevel(int level) { 51 android_atomic_write(level, &gLogLevel); 52} 53 54// ---------------------------------------------------------------------------- 55 56static int getCallingPid() { 57 return IPCThreadState::self()->getCallingPid(); 58} 59 60static int getCallingUid() { 61 return IPCThreadState::self()->getCallingUid(); 62} 63 64// ---------------------------------------------------------------------------- 65 66// This is ugly and only safe if we never re-create the CameraService, but 67// should be ok for now. 68static CameraService *gCameraService; 69 70CameraService::CameraService() 71:mSoundRef(0) 72{ 73 LOGI("CameraService started (pid=%d)", getpid()); 74 75 mNumberOfCameras = HAL_getNumberOfCameras(); 76 if (mNumberOfCameras > MAX_CAMERAS) { 77 LOGE("Number of cameras(%d) > MAX_CAMERAS(%d).", 78 mNumberOfCameras, MAX_CAMERAS); 79 mNumberOfCameras = MAX_CAMERAS; 80 } 81 82 for (int i = 0; i < mNumberOfCameras; i++) { 83 setCameraFree(i); 84 } 85 86 gCameraService = this; 87} 88 89CameraService::~CameraService() { 90 for (int i = 0; i < mNumberOfCameras; i++) { 91 if (mBusy[i]) { 92 LOGE("camera %d is still in use in destructor!", i); 93 } 94 } 95 96 gCameraService = NULL; 97} 98 99int32_t CameraService::getNumberOfCameras() { 100 return mNumberOfCameras; 101} 102 103status_t CameraService::getCameraInfo(int cameraId, 104 struct CameraInfo* cameraInfo) { 105 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 106 return BAD_VALUE; 107 } 108 109 HAL_getCameraInfo(cameraId, cameraInfo); 110 return OK; 111} 112 113sp<ICamera> CameraService::connect( 114 const sp<ICameraClient>& cameraClient, int cameraId) { 115 int callingPid = getCallingPid(); 116 LOG1("CameraService::connect E (pid %d, id %d)", callingPid, cameraId); 117 118 sp<Client> client; 119 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 120 LOGE("CameraService::connect X (pid %d) rejected (invalid cameraId %d).", 121 callingPid, cameraId); 122 return NULL; 123 } 124 125 Mutex::Autolock lock(mServiceLock); 126 if (mClient[cameraId] != 0) { 127 client = mClient[cameraId].promote(); 128 if (client != 0) { 129 if (cameraClient->asBinder() == client->getCameraClient()->asBinder()) { 130 LOG1("CameraService::connect X (pid %d) (the same client)", 131 callingPid); 132 return client; 133 } else { 134 LOGW("CameraService::connect X (pid %d) rejected (existing client).", 135 callingPid); 136 return NULL; 137 } 138 } 139 mClient[cameraId].clear(); 140 } 141 142 if (mBusy[cameraId]) { 143 LOGW("CameraService::connect X (pid %d) rejected" 144 " (camera %d is still busy).", callingPid, cameraId); 145 return NULL; 146 } 147 148 sp<CameraHardwareInterface> hardware = HAL_openCameraHardware(cameraId); 149 if (hardware == NULL) { 150 LOGE("Fail to open camera hardware (id=%d)", cameraId); 151 return NULL; 152 } 153 CameraInfo info; 154 HAL_getCameraInfo(cameraId, &info); 155 client = new Client(this, cameraClient, hardware, cameraId, info.facing, 156 callingPid); 157 mClient[cameraId] = client; 158 LOG1("CameraService::connect X"); 159 return client; 160} 161 162void CameraService::removeClient(const sp<ICameraClient>& cameraClient) { 163 int callingPid = getCallingPid(); 164 LOG1("CameraService::removeClient E (pid %d)", callingPid); 165 166 for (int i = 0; i < mNumberOfCameras; i++) { 167 // Declare this before the lock to make absolutely sure the 168 // destructor won't be called with the lock held. 169 sp<Client> client; 170 171 Mutex::Autolock lock(mServiceLock); 172 173 // This happens when we have already disconnected (or this is 174 // just another unused camera). 175 if (mClient[i] == 0) continue; 176 177 // Promote mClient. It can fail if we are called from this path: 178 // Client::~Client() -> disconnect() -> removeClient(). 179 client = mClient[i].promote(); 180 181 if (client == 0) { 182 mClient[i].clear(); 183 continue; 184 } 185 186 if (cameraClient->asBinder() == client->getCameraClient()->asBinder()) { 187 // Found our camera, clear and leave. 188 LOG1("removeClient: clear camera %d", i); 189 mClient[i].clear(); 190 break; 191 } 192 } 193 194 LOG1("CameraService::removeClient X (pid %d)", callingPid); 195} 196 197sp<CameraService::Client> CameraService::getClientById(int cameraId) { 198 if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL; 199 return mClient[cameraId].promote(); 200} 201 202status_t CameraService::onTransact( 203 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) { 204 // Permission checks 205 switch (code) { 206 case BnCameraService::CONNECT: 207 const int pid = getCallingPid(); 208 const int self_pid = getpid(); 209 if (pid != self_pid) { 210 // we're called from a different process, do the real check 211 if (!checkCallingPermission( 212 String16("android.permission.CAMERA"))) { 213 const int uid = getCallingUid(); 214 LOGE("Permission Denial: " 215 "can't use the camera pid=%d, uid=%d", pid, uid); 216 return PERMISSION_DENIED; 217 } 218 } 219 break; 220 } 221 222 return BnCameraService::onTransact(code, data, reply, flags); 223} 224 225// The reason we need this busy bit is a new CameraService::connect() request 226// may come in while the previous Client's destructor has not been run or is 227// still running. If the last strong reference of the previous Client is gone 228// but the destructor has not been finished, we should not allow the new Client 229// to be created because we need to wait for the previous Client to tear down 230// the hardware first. 231void CameraService::setCameraBusy(int cameraId) { 232 android_atomic_write(1, &mBusy[cameraId]); 233} 234 235void CameraService::setCameraFree(int cameraId) { 236 android_atomic_write(0, &mBusy[cameraId]); 237} 238 239// We share the media players for shutter and recording sound for all clients. 240// A reference count is kept to determine when we will actually release the 241// media players. 242 243static MediaPlayer* newMediaPlayer(const char *file) { 244 MediaPlayer* mp = new MediaPlayer(); 245 if (mp->setDataSource(file, NULL) == NO_ERROR) { 246 mp->setAudioStreamType(AudioSystem::ENFORCED_AUDIBLE); 247 mp->prepare(); 248 } else { 249 LOGE("Failed to load CameraService sounds: %s", file); 250 return NULL; 251 } 252 return mp; 253} 254 255void CameraService::loadSound() { 256 Mutex::Autolock lock(mSoundLock); 257 LOG1("CameraService::loadSound ref=%d", mSoundRef); 258 if (mSoundRef++) return; 259 260 mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg"); 261 mSoundPlayer[SOUND_RECORDING] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg"); 262} 263 264void CameraService::releaseSound() { 265 Mutex::Autolock lock(mSoundLock); 266 LOG1("CameraService::releaseSound ref=%d", mSoundRef); 267 if (--mSoundRef) return; 268 269 for (int i = 0; i < NUM_SOUNDS; i++) { 270 if (mSoundPlayer[i] != 0) { 271 mSoundPlayer[i]->disconnect(); 272 mSoundPlayer[i].clear(); 273 } 274 } 275} 276 277void CameraService::playSound(sound_kind kind) { 278 LOG1("playSound(%d)", kind); 279 Mutex::Autolock lock(mSoundLock); 280 sp<MediaPlayer> player = mSoundPlayer[kind]; 281 if (player != 0) { 282 // do not play the sound if stream volume is 0 283 // (typically because ringer mode is silent). 284 int index; 285 AudioSystem::getStreamVolumeIndex(AudioSystem::ENFORCED_AUDIBLE, &index); 286 if (index != 0) { 287 player->seekTo(0); 288 player->start(); 289 } 290 } 291} 292 293// ---------------------------------------------------------------------------- 294 295CameraService::Client::Client(const sp<CameraService>& cameraService, 296 const sp<ICameraClient>& cameraClient, 297 const sp<CameraHardwareInterface>& hardware, 298 int cameraId, int cameraFacing, int clientPid) { 299 int callingPid = getCallingPid(); 300 LOG1("Client::Client E (pid %d)", callingPid); 301 302 mCameraService = cameraService; 303 mCameraClient = cameraClient; 304 mHardware = hardware; 305 mCameraId = cameraId; 306 mCameraFacing = cameraFacing; 307 mClientPid = clientPid; 308 mMsgEnabled = 0; 309 mHardware->setCallbacks(notifyCallback, 310 dataCallback, 311 dataCallbackTimestamp, 312 (void *)cameraId); 313 314 // Enable zoom, error, and focus messages by default 315 enableMsgType(CAMERA_MSG_ERROR | 316 CAMERA_MSG_ZOOM | 317 CAMERA_MSG_FOCUS); 318 319 // Callback is disabled by default 320 mPreviewCallbackFlag = FRAME_CALLBACK_FLAG_NOOP; 321 mOrientation = getOrientation(0, mCameraFacing == CAMERA_FACING_FRONT); 322 mPlayShutterSound = true; 323 cameraService->setCameraBusy(cameraId); 324 cameraService->loadSound(); 325 LOG1("Client::Client X (pid %d)", callingPid); 326} 327 328// tear down the client 329CameraService::Client::~Client() { 330 int callingPid = getCallingPid(); 331 LOG1("Client::~Client E (pid %d, this %p)", callingPid, this); 332 333 // set mClientPid to let disconnet() tear down the hardware 334 mClientPid = callingPid; 335 disconnect(); 336 mCameraService->releaseSound(); 337 LOG1("Client::~Client X (pid %d, this %p)", callingPid, this); 338} 339 340// ---------------------------------------------------------------------------- 341 342status_t CameraService::Client::checkPid() const { 343 int callingPid = getCallingPid(); 344 if (callingPid == mClientPid) return NO_ERROR; 345 346 LOGW("attempt to use a locked camera from a different process" 347 " (old pid %d, new pid %d)", mClientPid, callingPid); 348 return EBUSY; 349} 350 351status_t CameraService::Client::checkPidAndHardware() const { 352 status_t result = checkPid(); 353 if (result != NO_ERROR) return result; 354 if (mHardware == 0) { 355 LOGE("attempt to use a camera after disconnect() (pid %d)", getCallingPid()); 356 return INVALID_OPERATION; 357 } 358 return NO_ERROR; 359} 360 361status_t CameraService::Client::lock() { 362 int callingPid = getCallingPid(); 363 LOG1("lock (pid %d)", callingPid); 364 Mutex::Autolock lock(mLock); 365 366 // lock camera to this client if the the camera is unlocked 367 if (mClientPid == 0) { 368 mClientPid = callingPid; 369 return NO_ERROR; 370 } 371 372 // returns NO_ERROR if the client already owns the camera, EBUSY otherwise 373 return checkPid(); 374} 375 376status_t CameraService::Client::unlock() { 377 int callingPid = getCallingPid(); 378 LOG1("unlock (pid %d)", callingPid); 379 Mutex::Autolock lock(mLock); 380 381 // allow anyone to use camera (after they lock the camera) 382 status_t result = checkPid(); 383 if (result == NO_ERROR) { 384 mClientPid = 0; 385 LOG1("clear mCameraClient (pid %d)", callingPid); 386 // we need to remove the reference to ICameraClient so that when the app 387 // goes away, the reference count goes to 0. 388 mCameraClient.clear(); 389 } 390 return result; 391} 392 393// connect a new client to the camera 394status_t CameraService::Client::connect(const sp<ICameraClient>& client) { 395 int callingPid = getCallingPid(); 396 LOG1("connect E (pid %d)", callingPid); 397 Mutex::Autolock lock(mLock); 398 399 if (mClientPid != 0 && checkPid() != NO_ERROR) { 400 LOGW("Tried to connect to a locked camera (old pid %d, new pid %d)", 401 mClientPid, callingPid); 402 return EBUSY; 403 } 404 405 if (mCameraClient != 0 && (client->asBinder() == mCameraClient->asBinder())) { 406 LOG1("Connect to the same client"); 407 return NO_ERROR; 408 } 409 410 mPreviewCallbackFlag = FRAME_CALLBACK_FLAG_NOOP; 411 mClientPid = callingPid; 412 mCameraClient = client; 413 414 LOG1("connect X (pid %d)", callingPid); 415 return NO_ERROR; 416} 417 418void CameraService::Client::disconnect() { 419 int callingPid = getCallingPid(); 420 LOG1("disconnect E (pid %d)", callingPid); 421 Mutex::Autolock lock(mLock); 422 423 if (checkPid() != NO_ERROR) { 424 LOGW("different client - don't disconnect"); 425 return; 426 } 427 428 if (mClientPid <= 0) { 429 LOG1("camera is unlocked (mClientPid = %d), don't tear down hardware", mClientPid); 430 return; 431 } 432 433 // Make sure disconnect() is done once and once only, whether it is called 434 // from the user directly, or called by the destructor. 435 if (mHardware == 0) return; 436 437 LOG1("hardware teardown"); 438 // Before destroying mHardware, we must make sure it's in the 439 // idle state. 440 // Turn off all messages. 441 disableMsgType(CAMERA_MSG_ALL_MSGS); 442 mHardware->stopPreview(); 443 mHardware->cancelPicture(); 444 // Release the hardware resources. 445 mHardware->release(); 446 447 // Release the held ANativeWindow resources. 448 if (mPreviewWindow != 0) { 449 mPreviewWindow = 0; 450 mHardware->setPreviewWindow(mPreviewWindow); 451 } 452 mHardware.clear(); 453 454 mCameraService->removeClient(mCameraClient); 455 mCameraService->setCameraFree(mCameraId); 456 457 LOG1("disconnect X (pid %d)", callingPid); 458} 459 460// ---------------------------------------------------------------------------- 461 462// set the Surface that the preview will use 463status_t CameraService::Client::setPreviewDisplay(const sp<Surface>& surface) { 464 LOG1("setPreviewDisplay(%p) (pid %d)", surface.get(), getCallingPid()); 465 Mutex::Autolock lock(mLock); 466 status_t result = checkPidAndHardware(); 467 if (result != NO_ERROR) return result; 468 469 result = NO_ERROR; 470 471 // return if no change in surface. 472 // asBinder() is safe on NULL (returns NULL) 473 if (getISurface(surface)->asBinder() == mSurface->asBinder()) { 474 return result; 475 } 476 477 if (mSurface != 0) { 478 LOG1("clearing old preview surface %p", mSurface.get()); 479 } 480 if (surface != 0) { 481 mSurface = getISurface(surface); 482 } else { 483 mSurface = 0; 484 } 485 mPreviewWindow = surface; 486 // If preview has been already started, register preview 487 // buffers now. 488 if (mHardware->previewEnabled()) { 489 if (mPreviewWindow != 0) { 490 native_window_set_buffers_transform(mPreviewWindow.get(), 491 mOrientation); 492 result = mHardware->setPreviewWindow(mPreviewWindow); 493 } 494 } 495 496 return result; 497} 498 499// set the preview callback flag to affect how the received frames from 500// preview are handled. 501void CameraService::Client::setPreviewCallbackFlag(int callback_flag) { 502 LOG1("setPreviewCallbackFlag(%d) (pid %d)", callback_flag, getCallingPid()); 503 Mutex::Autolock lock(mLock); 504 if (checkPidAndHardware() != NO_ERROR) return; 505 506 mPreviewCallbackFlag = callback_flag; 507 if (mPreviewCallbackFlag & FRAME_CALLBACK_FLAG_ENABLE_MASK) { 508 enableMsgType(CAMERA_MSG_PREVIEW_FRAME); 509 } else { 510 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 511 } 512} 513 514// start preview mode 515status_t CameraService::Client::startPreview() { 516 LOG1("startPreview (pid %d)", getCallingPid()); 517 return startCameraMode(CAMERA_PREVIEW_MODE); 518} 519 520// start recording mode 521status_t CameraService::Client::startRecording() { 522 LOG1("startRecording (pid %d)", getCallingPid()); 523 return startCameraMode(CAMERA_RECORDING_MODE); 524} 525 526// start preview or recording 527status_t CameraService::Client::startCameraMode(camera_mode mode) { 528 LOG1("startCameraMode(%d)", mode); 529 Mutex::Autolock lock(mLock); 530 status_t result = checkPidAndHardware(); 531 if (result != NO_ERROR) return result; 532 533 switch(mode) { 534 case CAMERA_PREVIEW_MODE: 535 if (mSurface == 0 && mPreviewWindow == 0) { 536 LOG1("mSurface is not set yet."); 537 // still able to start preview in this case. 538 } 539 return startPreviewMode(); 540 case CAMERA_RECORDING_MODE: 541 if (mSurface == 0 && mPreviewWindow == 0) { 542 LOGE("mSurface or mPreviewWindow must be set before startRecordingMode."); 543 return INVALID_OPERATION; 544 } 545 return startRecordingMode(); 546 default: 547 return UNKNOWN_ERROR; 548 } 549} 550 551status_t CameraService::Client::startPreviewMode() { 552 LOG1("startPreviewMode"); 553 status_t result = NO_ERROR; 554 555 // if preview has been enabled, nothing needs to be done 556 if (mHardware->previewEnabled()) { 557 return NO_ERROR; 558 } 559 560 if (mPreviewWindow != 0) { 561 native_window_set_buffers_transform(mPreviewWindow.get(), 562 mOrientation); 563 } 564 mHardware->setPreviewWindow(mPreviewWindow); 565 result = mHardware->startPreview(); 566 567 return result; 568} 569 570status_t CameraService::Client::startRecordingMode() { 571 LOG1("startRecordingMode"); 572 status_t result = NO_ERROR; 573 574 // if recording has been enabled, nothing needs to be done 575 if (mHardware->recordingEnabled()) { 576 return NO_ERROR; 577 } 578 579 // if preview has not been started, start preview first 580 if (!mHardware->previewEnabled()) { 581 result = startPreviewMode(); 582 if (result != NO_ERROR) { 583 return result; 584 } 585 } 586 587 // start recording mode 588 enableMsgType(CAMERA_MSG_VIDEO_FRAME); 589 mCameraService->playSound(SOUND_RECORDING); 590 result = mHardware->startRecording(); 591 if (result != NO_ERROR) { 592 LOGE("mHardware->startRecording() failed with status %d", result); 593 } 594 return result; 595} 596 597// stop preview mode 598void CameraService::Client::stopPreview() { 599 LOG1("stopPreview (pid %d)", getCallingPid()); 600 Mutex::Autolock lock(mLock); 601 if (checkPidAndHardware() != NO_ERROR) return; 602 603 604 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 605 mHardware->stopPreview(); 606 607 mPreviewBuffer.clear(); 608} 609 610// stop recording mode 611void CameraService::Client::stopRecording() { 612 LOG1("stopRecording (pid %d)", getCallingPid()); 613 Mutex::Autolock lock(mLock); 614 if (checkPidAndHardware() != NO_ERROR) return; 615 616 mCameraService->playSound(SOUND_RECORDING); 617 disableMsgType(CAMERA_MSG_VIDEO_FRAME); 618 mHardware->stopRecording(); 619 620 mPreviewBuffer.clear(); 621} 622 623// release a recording frame 624void CameraService::Client::releaseRecordingFrame(const sp<IMemory>& mem) { 625 Mutex::Autolock lock(mLock); 626 if (checkPidAndHardware() != NO_ERROR) return; 627 mHardware->releaseRecordingFrame(mem); 628} 629 630int32_t CameraService::Client::getNumberOfVideoBuffers() const { 631 LOG1("getNumberOfVideoBuffers"); 632 Mutex::Autolock lock(mLock); 633 if (checkPidAndHardware() != NO_ERROR) return 0; 634 return mHardware->getNumberOfVideoBuffers(); 635} 636 637sp<IMemory> CameraService::Client::getVideoBuffer(int32_t index) const { 638 LOG1("getVideoBuffer: %d", index); 639 Mutex::Autolock lock(mLock); 640 if (checkPidAndHardware() != NO_ERROR) return 0; 641 return mHardware->getVideoBuffer(index); 642} 643 644status_t CameraService::Client::storeMetaDataInBuffers(bool enabled) 645{ 646 LOG1("storeMetaDataInBuffers: %s", enabled? "true": "false"); 647 Mutex::Autolock lock(mLock); 648 if (checkPidAndHardware() != NO_ERROR) { 649 return UNKNOWN_ERROR; 650 } 651 return mHardware->storeMetaDataInBuffers(enabled); 652} 653 654bool CameraService::Client::previewEnabled() { 655 LOG1("previewEnabled (pid %d)", getCallingPid()); 656 657 Mutex::Autolock lock(mLock); 658 if (checkPidAndHardware() != NO_ERROR) return false; 659 return mHardware->previewEnabled(); 660} 661 662bool CameraService::Client::recordingEnabled() { 663 LOG1("recordingEnabled (pid %d)", getCallingPid()); 664 665 Mutex::Autolock lock(mLock); 666 if (checkPidAndHardware() != NO_ERROR) return false; 667 return mHardware->recordingEnabled(); 668} 669 670status_t CameraService::Client::autoFocus() { 671 LOG1("autoFocus (pid %d)", getCallingPid()); 672 673 Mutex::Autolock lock(mLock); 674 status_t result = checkPidAndHardware(); 675 if (result != NO_ERROR) return result; 676 677 return mHardware->autoFocus(); 678} 679 680status_t CameraService::Client::cancelAutoFocus() { 681 LOG1("cancelAutoFocus (pid %d)", getCallingPid()); 682 683 Mutex::Autolock lock(mLock); 684 status_t result = checkPidAndHardware(); 685 if (result != NO_ERROR) return result; 686 687 return mHardware->cancelAutoFocus(); 688} 689 690// take a picture - image is returned in callback 691status_t CameraService::Client::takePicture() { 692 LOG1("takePicture (pid %d)", getCallingPid()); 693 694 Mutex::Autolock lock(mLock); 695 status_t result = checkPidAndHardware(); 696 if (result != NO_ERROR) return result; 697 698 enableMsgType(CAMERA_MSG_SHUTTER | 699 CAMERA_MSG_POSTVIEW_FRAME | 700 CAMERA_MSG_RAW_IMAGE | 701 CAMERA_MSG_COMPRESSED_IMAGE); 702 703 return mHardware->takePicture(); 704} 705 706// set preview/capture parameters - key/value pairs 707status_t CameraService::Client::setParameters(const String8& params) { 708 LOG1("setParameters (pid %d) (%s)", getCallingPid(), params.string()); 709 710 Mutex::Autolock lock(mLock); 711 status_t result = checkPidAndHardware(); 712 if (result != NO_ERROR) return result; 713 714 CameraParameters p(params); 715 return mHardware->setParameters(p); 716} 717 718// get preview/capture parameters - key/value pairs 719String8 CameraService::Client::getParameters() const { 720 Mutex::Autolock lock(mLock); 721 if (checkPidAndHardware() != NO_ERROR) return String8(); 722 723 String8 params(mHardware->getParameters().flatten()); 724 LOG1("getParameters (pid %d) (%s)", getCallingPid(), params.string()); 725 return params; 726} 727 728// enable shutter sound 729status_t CameraService::Client::enableShutterSound(bool enable) { 730 LOG1("enableShutterSound (pid %d)", getCallingPid()); 731 732 status_t result = checkPidAndHardware(); 733 if (result != NO_ERROR) return result; 734 735 if (enable) { 736 mPlayShutterSound = true; 737 return OK; 738 } 739 740 // Disabling shutter sound may not be allowed. In that case only 741 // allow the mediaserver process to disable the sound. 742 char value[PROPERTY_VALUE_MAX]; 743 property_get("ro.camera.sound.forced", value, "0"); 744 if (strcmp(value, "0") != 0) { 745 // Disabling shutter sound is not allowed. Deny if the current 746 // process is not mediaserver. 747 if (getCallingPid() != getpid()) { 748 LOGE("Failed to disable shutter sound. Permission denied (pid %d)", getCallingPid()); 749 return PERMISSION_DENIED; 750 } 751 } 752 753 mPlayShutterSound = false; 754 return OK; 755} 756 757status_t CameraService::Client::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) { 758 LOG1("sendCommand (pid %d)", getCallingPid()); 759 int orientation; 760 Mutex::Autolock lock(mLock); 761 status_t result = checkPidAndHardware(); 762 if (result != NO_ERROR) return result; 763 764 if (cmd == CAMERA_CMD_SET_DISPLAY_ORIENTATION) { 765 // The orientation cannot be set during preview. 766 if (mHardware->previewEnabled()) { 767 return INVALID_OPERATION; 768 } 769 // Mirror the preview if the camera is front-facing. 770 orientation = getOrientation(arg1, mCameraFacing == CAMERA_FACING_FRONT); 771 if (orientation == -1) return BAD_VALUE; 772 773 if (mOrientation != orientation) { 774 mOrientation = orientation; 775 } 776 return OK; 777 } else if (cmd == CAMERA_CMD_ENABLE_SHUTTER_SOUND) { 778 switch (arg1) { 779 case 0: 780 enableShutterSound(false); 781 break; 782 case 1: 783 enableShutterSound(true); 784 break; 785 default: 786 return BAD_VALUE; 787 } 788 return OK; 789 } else if (cmd == CAMERA_CMD_PLAY_RECORDING_SOUND) { 790 mCameraService->playSound(SOUND_RECORDING); 791 } 792 793 return mHardware->sendCommand(cmd, arg1, arg2); 794} 795 796// ---------------------------------------------------------------------------- 797 798void CameraService::Client::enableMsgType(int32_t msgType) { 799 android_atomic_or(msgType, &mMsgEnabled); 800 mHardware->enableMsgType(msgType); 801} 802 803void CameraService::Client::disableMsgType(int32_t msgType) { 804 android_atomic_and(~msgType, &mMsgEnabled); 805 mHardware->disableMsgType(msgType); 806} 807 808#define CHECK_MESSAGE_INTERVAL 10 // 10ms 809bool CameraService::Client::lockIfMessageWanted(int32_t msgType) { 810 int sleepCount = 0; 811 while (mMsgEnabled & msgType) { 812 if (mLock.tryLock() == NO_ERROR) { 813 if (sleepCount > 0) { 814 LOG1("lockIfMessageWanted(%d): waited for %d ms", 815 msgType, sleepCount * CHECK_MESSAGE_INTERVAL); 816 } 817 return true; 818 } 819 if (sleepCount++ == 0) { 820 LOG1("lockIfMessageWanted(%d): enter sleep", msgType); 821 } 822 usleep(CHECK_MESSAGE_INTERVAL * 1000); 823 } 824 LOGW("lockIfMessageWanted(%d): dropped unwanted message", msgType); 825 return false; 826} 827 828// ---------------------------------------------------------------------------- 829 830// Converts from a raw pointer to the client to a strong pointer during a 831// hardware callback. This requires the callbacks only happen when the client 832// is still alive. 833sp<CameraService::Client> CameraService::Client::getClientFromCookie(void* user) { 834 sp<Client> client = gCameraService->getClientById((int) user); 835 836 // This could happen if the Client is in the process of shutting down (the 837 // last strong reference is gone, but the destructor hasn't finished 838 // stopping the hardware). 839 if (client == 0) return NULL; 840 841 // The checks below are not necessary and are for debugging only. 842 if (client->mCameraService.get() != gCameraService) { 843 LOGE("mismatch service!"); 844 return NULL; 845 } 846 847 if (client->mHardware == 0) { 848 LOGE("mHardware == 0: callback after disconnect()?"); 849 return NULL; 850 } 851 852 return client; 853} 854 855// Callback messages can be dispatched to internal handlers or pass to our 856// client's callback functions, depending on the message type. 857// 858// notifyCallback: 859// CAMERA_MSG_SHUTTER handleShutter 860// (others) c->notifyCallback 861// dataCallback: 862// CAMERA_MSG_PREVIEW_FRAME handlePreviewData 863// CAMERA_MSG_POSTVIEW_FRAME handlePostview 864// CAMERA_MSG_RAW_IMAGE handleRawPicture 865// CAMERA_MSG_COMPRESSED_IMAGE handleCompressedPicture 866// (others) c->dataCallback 867// dataCallbackTimestamp 868// (others) c->dataCallbackTimestamp 869// 870// NOTE: the *Callback functions grab mLock of the client before passing 871// control to handle* functions. So the handle* functions must release the 872// lock before calling the ICameraClient's callbacks, so those callbacks can 873// invoke methods in the Client class again (For example, the preview frame 874// callback may want to releaseRecordingFrame). The handle* functions must 875// release the lock after all accesses to member variables, so it must be 876// handled very carefully. 877 878void CameraService::Client::notifyCallback(int32_t msgType, int32_t ext1, 879 int32_t ext2, void* user) { 880 LOG2("notifyCallback(%d)", msgType); 881 882 sp<Client> client = getClientFromCookie(user); 883 if (client == 0) return; 884 if (!client->lockIfMessageWanted(msgType)) return; 885 886 switch (msgType) { 887 case CAMERA_MSG_SHUTTER: 888 // ext1 is the dimension of the yuv picture. 889 client->handleShutter((image_rect_type *)ext1); 890 break; 891 default: 892 client->handleGenericNotify(msgType, ext1, ext2); 893 break; 894 } 895} 896 897void CameraService::Client::dataCallback(int32_t msgType, 898 const sp<IMemory>& dataPtr, void* user) { 899 LOG2("dataCallback(%d)", msgType); 900 901 sp<Client> client = getClientFromCookie(user); 902 if (client == 0) return; 903 if (!client->lockIfMessageWanted(msgType)) return; 904 905 if (dataPtr == 0) { 906 LOGE("Null data returned in data callback"); 907 client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); 908 return; 909 } 910 911 switch (msgType) { 912 case CAMERA_MSG_PREVIEW_FRAME: 913 client->handlePreviewData(dataPtr); 914 break; 915 case CAMERA_MSG_POSTVIEW_FRAME: 916 client->handlePostview(dataPtr); 917 break; 918 case CAMERA_MSG_RAW_IMAGE: 919 client->handleRawPicture(dataPtr); 920 break; 921 case CAMERA_MSG_COMPRESSED_IMAGE: 922 client->handleCompressedPicture(dataPtr); 923 break; 924 default: 925 client->handleGenericData(msgType, dataPtr); 926 break; 927 } 928} 929 930void CameraService::Client::dataCallbackTimestamp(nsecs_t timestamp, 931 int32_t msgType, const sp<IMemory>& dataPtr, void* user) { 932 LOG2("dataCallbackTimestamp(%d)", msgType); 933 934 sp<Client> client = getClientFromCookie(user); 935 if (client == 0) return; 936 if (!client->lockIfMessageWanted(msgType)) return; 937 938 if (dataPtr == 0) { 939 LOGE("Null data returned in data with timestamp callback"); 940 client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); 941 return; 942 } 943 944 client->handleGenericDataTimestamp(timestamp, msgType, dataPtr); 945} 946 947// snapshot taken callback 948// "size" is the width and height of yuv picture for registerBuffer. 949// If it is NULL, use the picture size from parameters. 950void CameraService::Client::handleShutter(image_rect_type *size) { 951 if (mPlayShutterSound) { 952 mCameraService->playSound(SOUND_SHUTTER); 953 } 954 955 sp<ICameraClient> c = mCameraClient; 956 if (c != 0) { 957 mLock.unlock(); 958 c->notifyCallback(CAMERA_MSG_SHUTTER, 0, 0); 959 if (!lockIfMessageWanted(CAMERA_MSG_SHUTTER)) return; 960 } 961 disableMsgType(CAMERA_MSG_SHUTTER); 962 963 // It takes some time before yuvPicture callback to be called. 964 // Register the buffer for raw image here to reduce latency. 965 if (mSurface != 0) { 966 int w, h; 967 CameraParameters params(mHardware->getParameters()); 968 if (size == NULL) { 969 params.getPictureSize(&w, &h); 970 } else { 971 w = size->width; 972 h = size->height; 973 w &= ~1; 974 h &= ~1; 975 LOG1("Snapshot image width=%d, height=%d", w, h); 976 } 977 IPCThreadState::self()->flushCommands(); 978 } 979 980 mLock.unlock(); 981} 982 983// preview callback - frame buffer update 984void CameraService::Client::handlePreviewData(const sp<IMemory>& mem) { 985 ssize_t offset; 986 size_t size; 987 sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); 988 989 // local copy of the callback flags 990 int flags = mPreviewCallbackFlag; 991 992 // is callback enabled? 993 if (!(flags & FRAME_CALLBACK_FLAG_ENABLE_MASK)) { 994 // If the enable bit is off, the copy-out and one-shot bits are ignored 995 LOG2("frame callback is disabled"); 996 mLock.unlock(); 997 return; 998 } 999 1000 // hold a strong pointer to the client 1001 sp<ICameraClient> c = mCameraClient; 1002 1003 // clear callback flags if no client or one-shot mode 1004 if (c == 0 || (mPreviewCallbackFlag & FRAME_CALLBACK_FLAG_ONE_SHOT_MASK)) { 1005 LOG2("Disable preview callback"); 1006 mPreviewCallbackFlag &= ~(FRAME_CALLBACK_FLAG_ONE_SHOT_MASK | 1007 FRAME_CALLBACK_FLAG_COPY_OUT_MASK | 1008 FRAME_CALLBACK_FLAG_ENABLE_MASK); 1009 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 1010 } 1011 1012 if (c != 0) { 1013 // Is the received frame copied out or not? 1014 if (flags & FRAME_CALLBACK_FLAG_COPY_OUT_MASK) { 1015 LOG2("frame is copied"); 1016 copyFrameAndPostCopiedFrame(c, heap, offset, size); 1017 } else { 1018 LOG2("frame is forwarded"); 1019 mLock.unlock(); 1020 c->dataCallback(CAMERA_MSG_PREVIEW_FRAME, mem); 1021 } 1022 } else { 1023 mLock.unlock(); 1024 } 1025} 1026 1027// picture callback - postview image ready 1028void CameraService::Client::handlePostview(const sp<IMemory>& mem) { 1029 disableMsgType(CAMERA_MSG_POSTVIEW_FRAME); 1030 1031 sp<ICameraClient> c = mCameraClient; 1032 mLock.unlock(); 1033 if (c != 0) { 1034 c->dataCallback(CAMERA_MSG_POSTVIEW_FRAME, mem); 1035 } 1036} 1037 1038// picture callback - raw image ready 1039void CameraService::Client::handleRawPicture(const sp<IMemory>& mem) { 1040 disableMsgType(CAMERA_MSG_RAW_IMAGE); 1041 1042 ssize_t offset; 1043 size_t size; 1044 sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); 1045 1046 sp<ICameraClient> c = mCameraClient; 1047 mLock.unlock(); 1048 if (c != 0) { 1049 c->dataCallback(CAMERA_MSG_RAW_IMAGE, mem); 1050 } 1051} 1052 1053// picture callback - compressed picture ready 1054void CameraService::Client::handleCompressedPicture(const sp<IMemory>& mem) { 1055 disableMsgType(CAMERA_MSG_COMPRESSED_IMAGE); 1056 1057 sp<ICameraClient> c = mCameraClient; 1058 mLock.unlock(); 1059 if (c != 0) { 1060 c->dataCallback(CAMERA_MSG_COMPRESSED_IMAGE, mem); 1061 } 1062} 1063 1064 1065void CameraService::Client::handleGenericNotify(int32_t msgType, 1066 int32_t ext1, int32_t ext2) { 1067 sp<ICameraClient> c = mCameraClient; 1068 mLock.unlock(); 1069 if (c != 0) { 1070 c->notifyCallback(msgType, ext1, ext2); 1071 } 1072} 1073 1074void CameraService::Client::handleGenericData(int32_t msgType, 1075 const sp<IMemory>& dataPtr) { 1076 sp<ICameraClient> c = mCameraClient; 1077 mLock.unlock(); 1078 if (c != 0) { 1079 c->dataCallback(msgType, dataPtr); 1080 } 1081} 1082 1083void CameraService::Client::handleGenericDataTimestamp(nsecs_t timestamp, 1084 int32_t msgType, const sp<IMemory>& dataPtr) { 1085 sp<ICameraClient> c = mCameraClient; 1086 mLock.unlock(); 1087 if (c != 0) { 1088 c->dataCallbackTimestamp(timestamp, msgType, dataPtr); 1089 } 1090} 1091 1092void CameraService::Client::copyFrameAndPostCopiedFrame( 1093 const sp<ICameraClient>& client, const sp<IMemoryHeap>& heap, 1094 size_t offset, size_t size) { 1095 LOG2("copyFrameAndPostCopiedFrame"); 1096 // It is necessary to copy out of pmem before sending this to 1097 // the callback. For efficiency, reuse the same MemoryHeapBase 1098 // provided it's big enough. Don't allocate the memory or 1099 // perform the copy if there's no callback. 1100 // hold the preview lock while we grab a reference to the preview buffer 1101 sp<MemoryHeapBase> previewBuffer; 1102 1103 if (mPreviewBuffer == 0) { 1104 mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); 1105 } else if (size > mPreviewBuffer->virtualSize()) { 1106 mPreviewBuffer.clear(); 1107 mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); 1108 } 1109 if (mPreviewBuffer == 0) { 1110 LOGE("failed to allocate space for preview buffer"); 1111 mLock.unlock(); 1112 return; 1113 } 1114 previewBuffer = mPreviewBuffer; 1115 1116 memcpy(previewBuffer->base(), (uint8_t *)heap->base() + offset, size); 1117 1118 sp<MemoryBase> frame = new MemoryBase(previewBuffer, 0, size); 1119 if (frame == 0) { 1120 LOGE("failed to allocate space for frame callback"); 1121 mLock.unlock(); 1122 return; 1123 } 1124 1125 mLock.unlock(); 1126 client->dataCallback(CAMERA_MSG_PREVIEW_FRAME, frame); 1127} 1128 1129int CameraService::Client::getOrientation(int degrees, bool mirror) { 1130 if (!mirror) { 1131 if (degrees == 0) return 0; 1132 else if (degrees == 90) return HAL_TRANSFORM_ROT_90; 1133 else if (degrees == 180) return HAL_TRANSFORM_ROT_180; 1134 else if (degrees == 270) return HAL_TRANSFORM_ROT_270; 1135 } else { // Do mirror (horizontal flip) 1136 if (degrees == 0) { // FLIP_H and ROT_0 1137 return HAL_TRANSFORM_FLIP_H; 1138 } else if (degrees == 90) { // FLIP_H and ROT_90 1139 return HAL_TRANSFORM_FLIP_H | HAL_TRANSFORM_ROT_90; 1140 } else if (degrees == 180) { // FLIP_H and ROT_180 1141 return HAL_TRANSFORM_FLIP_V; 1142 } else if (degrees == 270) { // FLIP_H and ROT_270 1143 return HAL_TRANSFORM_FLIP_V | HAL_TRANSFORM_ROT_90; 1144 } 1145 } 1146 LOGE("Invalid setDisplayOrientation degrees=%d", degrees); 1147 return -1; 1148} 1149 1150 1151// ---------------------------------------------------------------------------- 1152 1153static const int kDumpLockRetries = 50; 1154static const int kDumpLockSleep = 60000; 1155 1156static bool tryLock(Mutex& mutex) 1157{ 1158 bool locked = false; 1159 for (int i = 0; i < kDumpLockRetries; ++i) { 1160 if (mutex.tryLock() == NO_ERROR) { 1161 locked = true; 1162 break; 1163 } 1164 usleep(kDumpLockSleep); 1165 } 1166 return locked; 1167} 1168 1169status_t CameraService::dump(int fd, const Vector<String16>& args) { 1170 static const char* kDeadlockedString = "CameraService may be deadlocked\n"; 1171 1172 const size_t SIZE = 256; 1173 char buffer[SIZE]; 1174 String8 result; 1175 if (checkCallingPermission(String16("android.permission.DUMP")) == false) { 1176 snprintf(buffer, SIZE, "Permission Denial: " 1177 "can't dump CameraService from pid=%d, uid=%d\n", 1178 getCallingPid(), 1179 getCallingUid()); 1180 result.append(buffer); 1181 write(fd, result.string(), result.size()); 1182 } else { 1183 bool locked = tryLock(mServiceLock); 1184 // failed to lock - CameraService is probably deadlocked 1185 if (!locked) { 1186 String8 result(kDeadlockedString); 1187 write(fd, result.string(), result.size()); 1188 } 1189 1190 bool hasClient = false; 1191 for (int i = 0; i < mNumberOfCameras; i++) { 1192 sp<Client> client = mClient[i].promote(); 1193 if (client == 0) continue; 1194 hasClient = true; 1195 sprintf(buffer, "Client[%d] (%p) PID: %d\n", 1196 i, 1197 client->getCameraClient()->asBinder().get(), 1198 client->mClientPid); 1199 result.append(buffer); 1200 write(fd, result.string(), result.size()); 1201 client->mHardware->dump(fd, args); 1202 } 1203 if (!hasClient) { 1204 result.append("No camera client yet.\n"); 1205 write(fd, result.string(), result.size()); 1206 } 1207 1208 if (locked) mServiceLock.unlock(); 1209 1210 // change logging level 1211 int n = args.size(); 1212 for (int i = 0; i + 1 < n; i++) { 1213 if (args[i] == String16("-v")) { 1214 String8 levelStr(args[i+1]); 1215 int level = atoi(levelStr.string()); 1216 sprintf(buffer, "Set Log Level to %d", level); 1217 result.append(buffer); 1218 setLogLevel(level); 1219 } 1220 } 1221 } 1222 return NO_ERROR; 1223} 1224 1225sp<ISurface> CameraService::getISurface(const sp<Surface>& surface) { 1226 if (surface != 0) { 1227 return surface->getISurface(); 1228 } else { 1229 return sp<ISurface>(0); 1230 } 1231} 1232 1233}; // namespace android 1234