CameraService.cpp revision 9e626526453f91999bdf3de4c2ec8e55c5d90511
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 <gui/SurfaceTextureClient.h> 31#include <hardware/hardware.h> 32#include <media/AudioSystem.h> 33#include <media/mediaplayer.h> 34#include <surfaceflinger/ISurface.h> 35#include <utils/Errors.h> 36#include <utils/Log.h> 37#include <utils/String16.h> 38 39#include "CameraService.h" 40 41namespace android { 42 43// ---------------------------------------------------------------------------- 44// Logging support -- this is for debugging only 45// Use "adb shell dumpsys media.camera -v 1" to change it. 46static volatile int32_t gLogLevel = 0; 47 48#define LOG1(...) LOGD_IF(gLogLevel >= 1, __VA_ARGS__); 49#define LOG2(...) LOGD_IF(gLogLevel >= 2, __VA_ARGS__); 50 51static void setLogLevel(int level) { 52 android_atomic_write(level, &gLogLevel); 53} 54 55// ---------------------------------------------------------------------------- 56 57static int getCallingPid() { 58 return IPCThreadState::self()->getCallingPid(); 59} 60 61static int getCallingUid() { 62 return IPCThreadState::self()->getCallingUid(); 63} 64 65// ---------------------------------------------------------------------------- 66 67// This is ugly and only safe if we never re-create the CameraService, but 68// should be ok for now. 69static CameraService *gCameraService; 70 71CameraService::CameraService() 72:mSoundRef(0) 73{ 74 LOGI("CameraService started (pid=%d)", getpid()); 75 76 mNumberOfCameras = HAL_getNumberOfCameras(); 77 if (mNumberOfCameras > MAX_CAMERAS) { 78 LOGE("Number of cameras(%d) > MAX_CAMERAS(%d).", 79 mNumberOfCameras, MAX_CAMERAS); 80 mNumberOfCameras = MAX_CAMERAS; 81 } 82 83 for (int i = 0; i < mNumberOfCameras; i++) { 84 setCameraFree(i); 85 } 86 87 gCameraService = this; 88} 89 90CameraService::~CameraService() { 91 for (int i = 0; i < mNumberOfCameras; i++) { 92 if (mBusy[i]) { 93 LOGE("camera %d is still in use in destructor!", i); 94 } 95 } 96 97 gCameraService = NULL; 98} 99 100int32_t CameraService::getNumberOfCameras() { 101 return mNumberOfCameras; 102} 103 104status_t CameraService::getCameraInfo(int cameraId, 105 struct CameraInfo* cameraInfo) { 106 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 107 return BAD_VALUE; 108 } 109 110 HAL_getCameraInfo(cameraId, cameraInfo); 111 return OK; 112} 113 114sp<ICamera> CameraService::connect( 115 const sp<ICameraClient>& cameraClient, int cameraId) { 116 int callingPid = getCallingPid(); 117 LOG1("CameraService::connect E (pid %d, id %d)", callingPid, cameraId); 118 119 sp<Client> client; 120 if (cameraId < 0 || cameraId >= mNumberOfCameras) { 121 LOGE("CameraService::connect X (pid %d) rejected (invalid cameraId %d).", 122 callingPid, cameraId); 123 return NULL; 124 } 125 126 Mutex::Autolock lock(mServiceLock); 127 if (mClient[cameraId] != 0) { 128 client = mClient[cameraId].promote(); 129 if (client != 0) { 130 if (cameraClient->asBinder() == client->getCameraClient()->asBinder()) { 131 LOG1("CameraService::connect X (pid %d) (the same client)", 132 callingPid); 133 return client; 134 } else { 135 LOGW("CameraService::connect X (pid %d) rejected (existing client).", 136 callingPid); 137 return NULL; 138 } 139 } 140 mClient[cameraId].clear(); 141 } 142 143 if (mBusy[cameraId]) { 144 LOGW("CameraService::connect X (pid %d) rejected" 145 " (camera %d is still busy).", callingPid, cameraId); 146 return NULL; 147 } 148 149 sp<CameraHardwareInterface> hardware = HAL_openCameraHardware(cameraId); 150 if (hardware == NULL) { 151 LOGE("Fail to open camera hardware (id=%d)", cameraId); 152 return NULL; 153 } 154 CameraInfo info; 155 HAL_getCameraInfo(cameraId, &info); 156 client = new Client(this, cameraClient, hardware, cameraId, info.facing, 157 callingPid); 158 mClient[cameraId] = client; 159 LOG1("CameraService::connect X"); 160 return client; 161} 162 163void CameraService::removeClient(const sp<ICameraClient>& cameraClient) { 164 int callingPid = getCallingPid(); 165 LOG1("CameraService::removeClient E (pid %d)", callingPid); 166 167 for (int i = 0; i < mNumberOfCameras; i++) { 168 // Declare this before the lock to make absolutely sure the 169 // destructor won't be called with the lock held. 170 sp<Client> client; 171 172 Mutex::Autolock lock(mServiceLock); 173 174 // This happens when we have already disconnected (or this is 175 // just another unused camera). 176 if (mClient[i] == 0) continue; 177 178 // Promote mClient. It can fail if we are called from this path: 179 // Client::~Client() -> disconnect() -> removeClient(). 180 client = mClient[i].promote(); 181 182 if (client == 0) { 183 mClient[i].clear(); 184 continue; 185 } 186 187 if (cameraClient->asBinder() == client->getCameraClient()->asBinder()) { 188 // Found our camera, clear and leave. 189 LOG1("removeClient: clear camera %d", i); 190 mClient[i].clear(); 191 break; 192 } 193 } 194 195 LOG1("CameraService::removeClient X (pid %d)", callingPid); 196} 197 198sp<CameraService::Client> CameraService::getClientById(int cameraId) { 199 if (cameraId < 0 || cameraId >= mNumberOfCameras) return NULL; 200 return mClient[cameraId].promote(); 201} 202 203status_t CameraService::onTransact( 204 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) { 205 // Permission checks 206 switch (code) { 207 case BnCameraService::CONNECT: 208 const int pid = getCallingPid(); 209 const int self_pid = getpid(); 210 if (pid != self_pid) { 211 // we're called from a different process, do the real check 212 if (!checkCallingPermission( 213 String16("android.permission.CAMERA"))) { 214 const int uid = getCallingUid(); 215 LOGE("Permission Denial: " 216 "can't use the camera pid=%d, uid=%d", pid, uid); 217 return PERMISSION_DENIED; 218 } 219 } 220 break; 221 } 222 223 return BnCameraService::onTransact(code, data, reply, flags); 224} 225 226// The reason we need this busy bit is a new CameraService::connect() request 227// may come in while the previous Client's destructor has not been run or is 228// still running. If the last strong reference of the previous Client is gone 229// but the destructor has not been finished, we should not allow the new Client 230// to be created because we need to wait for the previous Client to tear down 231// the hardware first. 232void CameraService::setCameraBusy(int cameraId) { 233 android_atomic_write(1, &mBusy[cameraId]); 234} 235 236void CameraService::setCameraFree(int cameraId) { 237 android_atomic_write(0, &mBusy[cameraId]); 238} 239 240// We share the media players for shutter and recording sound for all clients. 241// A reference count is kept to determine when we will actually release the 242// media players. 243 244static MediaPlayer* newMediaPlayer(const char *file) { 245 MediaPlayer* mp = new MediaPlayer(); 246 if (mp->setDataSource(file, NULL) == NO_ERROR) { 247 mp->setAudioStreamType(AUDIO_STREAM_ENFORCED_AUDIBLE); 248 mp->prepare(); 249 } else { 250 LOGE("Failed to load CameraService sounds: %s", file); 251 return NULL; 252 } 253 return mp; 254} 255 256void CameraService::loadSound() { 257 Mutex::Autolock lock(mSoundLock); 258 LOG1("CameraService::loadSound ref=%d", mSoundRef); 259 if (mSoundRef++) return; 260 261 mSoundPlayer[SOUND_SHUTTER] = newMediaPlayer("/system/media/audio/ui/camera_click.ogg"); 262 mSoundPlayer[SOUND_RECORDING] = newMediaPlayer("/system/media/audio/ui/VideoRecord.ogg"); 263} 264 265void CameraService::releaseSound() { 266 Mutex::Autolock lock(mSoundLock); 267 LOG1("CameraService::releaseSound ref=%d", mSoundRef); 268 if (--mSoundRef) return; 269 270 for (int i = 0; i < NUM_SOUNDS; i++) { 271 if (mSoundPlayer[i] != 0) { 272 mSoundPlayer[i]->disconnect(); 273 mSoundPlayer[i].clear(); 274 } 275 } 276} 277 278void CameraService::playSound(sound_kind kind) { 279 LOG1("playSound(%d)", kind); 280 Mutex::Autolock lock(mSoundLock); 281 sp<MediaPlayer> player = mSoundPlayer[kind]; 282 if (player != 0) { 283 // do not play the sound if stream volume is 0 284 // (typically because ringer mode is silent). 285 int index; 286 AudioSystem::getStreamVolumeIndex(AUDIO_STREAM_ENFORCED_AUDIBLE, &index); 287 if (index != 0) { 288 player->seekTo(0); 289 player->start(); 290 } 291 } 292} 293 294// ---------------------------------------------------------------------------- 295 296CameraService::Client::Client(const sp<CameraService>& cameraService, 297 const sp<ICameraClient>& cameraClient, 298 const sp<CameraHardwareInterface>& hardware, 299 int cameraId, int cameraFacing, int clientPid) { 300 int callingPid = getCallingPid(); 301 LOG1("Client::Client E (pid %d)", callingPid); 302 303 mCameraService = cameraService; 304 mCameraClient = cameraClient; 305 mHardware = hardware; 306 mCameraId = cameraId; 307 mCameraFacing = cameraFacing; 308 mClientPid = clientPid; 309 mMsgEnabled = 0; 310 mSurface = 0; 311 mPreviewWindow = 0; 312 mHardware->setCallbacks(notifyCallback, 313 dataCallback, 314 dataCallbackTimestamp, 315 (void *)cameraId); 316 317 // Enable zoom, error, and focus messages by default 318 enableMsgType(CAMERA_MSG_ERROR | 319 CAMERA_MSG_ZOOM | 320 CAMERA_MSG_FOCUS); 321 322 // Callback is disabled by default 323 mPreviewCallbackFlag = CAMERA_FRAME_CALLBACK_FLAG_NOOP; 324 mOrientation = getOrientation(0, mCameraFacing == CAMERA_FACING_FRONT); 325 mPlayShutterSound = true; 326 cameraService->setCameraBusy(cameraId); 327 cameraService->loadSound(); 328 LOG1("Client::Client X (pid %d)", callingPid); 329} 330 331// tear down the client 332CameraService::Client::~Client() { 333 int callingPid = getCallingPid(); 334 LOG1("Client::~Client E (pid %d, this %p)", callingPid, this); 335 336 // set mClientPid to let disconnet() tear down the hardware 337 mClientPid = callingPid; 338 disconnect(); 339 mCameraService->releaseSound(); 340 LOG1("Client::~Client X (pid %d, this %p)", callingPid, this); 341} 342 343// ---------------------------------------------------------------------------- 344 345status_t CameraService::Client::checkPid() const { 346 int callingPid = getCallingPid(); 347 if (callingPid == mClientPid) return NO_ERROR; 348 349 LOGW("attempt to use a locked camera from a different process" 350 " (old pid %d, new pid %d)", mClientPid, callingPid); 351 return EBUSY; 352} 353 354status_t CameraService::Client::checkPidAndHardware() const { 355 status_t result = checkPid(); 356 if (result != NO_ERROR) return result; 357 if (mHardware == 0) { 358 LOGE("attempt to use a camera after disconnect() (pid %d)", getCallingPid()); 359 return INVALID_OPERATION; 360 } 361 return NO_ERROR; 362} 363 364status_t CameraService::Client::lock() { 365 int callingPid = getCallingPid(); 366 LOG1("lock (pid %d)", callingPid); 367 Mutex::Autolock lock(mLock); 368 369 // lock camera to this client if the the camera is unlocked 370 if (mClientPid == 0) { 371 mClientPid = callingPid; 372 return NO_ERROR; 373 } 374 375 // returns NO_ERROR if the client already owns the camera, EBUSY otherwise 376 return checkPid(); 377} 378 379status_t CameraService::Client::unlock() { 380 int callingPid = getCallingPid(); 381 LOG1("unlock (pid %d)", callingPid); 382 Mutex::Autolock lock(mLock); 383 384 // allow anyone to use camera (after they lock the camera) 385 status_t result = checkPid(); 386 if (result == NO_ERROR) { 387 mClientPid = 0; 388 LOG1("clear mCameraClient (pid %d)", callingPid); 389 // we need to remove the reference to ICameraClient so that when the app 390 // goes away, the reference count goes to 0. 391 mCameraClient.clear(); 392 } 393 return result; 394} 395 396// connect a new client to the camera 397status_t CameraService::Client::connect(const sp<ICameraClient>& client) { 398 int callingPid = getCallingPid(); 399 LOG1("connect E (pid %d)", callingPid); 400 Mutex::Autolock lock(mLock); 401 402 if (mClientPid != 0 && checkPid() != NO_ERROR) { 403 LOGW("Tried to connect to a locked camera (old pid %d, new pid %d)", 404 mClientPid, callingPid); 405 return EBUSY; 406 } 407 408 if (mCameraClient != 0 && (client->asBinder() == mCameraClient->asBinder())) { 409 LOG1("Connect to the same client"); 410 return NO_ERROR; 411 } 412 413 mPreviewCallbackFlag = CAMERA_FRAME_CALLBACK_FLAG_NOOP; 414 mClientPid = callingPid; 415 mCameraClient = client; 416 417 LOG1("connect X (pid %d)", callingPid); 418 return NO_ERROR; 419} 420 421void CameraService::Client::disconnect() { 422 int callingPid = getCallingPid(); 423 LOG1("disconnect E (pid %d)", callingPid); 424 Mutex::Autolock lock(mLock); 425 426 if (checkPid() != NO_ERROR) { 427 LOGW("different client - don't disconnect"); 428 return; 429 } 430 431 if (mClientPid <= 0) { 432 LOG1("camera is unlocked (mClientPid = %d), don't tear down hardware", mClientPid); 433 return; 434 } 435 436 // Make sure disconnect() is done once and once only, whether it is called 437 // from the user directly, or called by the destructor. 438 if (mHardware == 0) return; 439 440 LOG1("hardware teardown"); 441 // Before destroying mHardware, we must make sure it's in the 442 // idle state. 443 // Turn off all messages. 444 disableMsgType(CAMERA_MSG_ALL_MSGS); 445 mHardware->stopPreview(); 446 mHardware->cancelPicture(); 447 // Release the hardware resources. 448 mHardware->release(); 449 450 // Release the held ANativeWindow resources. 451 if (mPreviewWindow != 0) { 452 mPreviewWindow = 0; 453 mHardware->setPreviewWindow(mPreviewWindow); 454 } 455 mHardware.clear(); 456 457 mCameraService->removeClient(mCameraClient); 458 mCameraService->setCameraFree(mCameraId); 459 460 LOG1("disconnect X (pid %d)", callingPid); 461} 462 463// ---------------------------------------------------------------------------- 464 465// set the Surface that the preview will use 466status_t CameraService::Client::setPreviewDisplay(const sp<Surface>& surface) { 467 LOG1("setPreviewDisplay(%p) (pid %d)", surface.get(), getCallingPid()); 468 Mutex::Autolock lock(mLock); 469 status_t result = checkPidAndHardware(); 470 if (result != NO_ERROR) return result; 471 472 result = NO_ERROR; 473 474 // return if no change in surface. 475 sp<IBinder> binder(surface != 0 ? surface->asBinder() : 0); 476 if (binder == mSurface) { 477 return result; 478 } 479 480 if (mSurface != 0) { 481 LOG1("clearing old preview surface %p", mSurface.get()); 482 } 483 mSurface = binder; 484 mPreviewWindow = surface; 485 486 // 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 SurfaceTexture that the preview will use 500status_t CameraService::Client::setPreviewTexture( 501 const sp<ISurfaceTexture>& surfaceTexture) { 502 LOG1("setPreviewTexture(%p) (pid %d)", surfaceTexture.get(), 503 getCallingPid()); 504 Mutex::Autolock lock(mLock); 505 status_t result = checkPidAndHardware(); 506 if (result != NO_ERROR) return result; 507 508 // return if no change in surface. 509 // asBinder() is safe on NULL (returns NULL) 510 if (surfaceTexture->asBinder() == mSurface) { 511 return result; 512 } 513 514 if (mSurface != 0) { 515 LOG1("clearing old preview surface %p", mSurface.get()); 516 } 517 mSurface = surfaceTexture->asBinder(); 518 if (surfaceTexture != 0) { 519 mPreviewWindow = new SurfaceTextureClient(surfaceTexture); 520 } else { 521 mPreviewWindow = 0; 522 } 523 524 // If preview has been already started, set overlay or register preview 525 // buffers now. 526 if (mHardware->previewEnabled()) { 527 // XXX: What if the new preview window is 0? 528 if (mPreviewWindow != 0) { 529 native_window_set_buffers_transform(mPreviewWindow.get(), 530 mOrientation); 531 result = mHardware->setPreviewWindow(mPreviewWindow); 532 } 533 } 534 535 return result; 536} 537 538// set the preview callback flag to affect how the received frames from 539// preview are handled. 540void CameraService::Client::setPreviewCallbackFlag(int callback_flag) { 541 LOG1("setPreviewCallbackFlag(%d) (pid %d)", callback_flag, getCallingPid()); 542 Mutex::Autolock lock(mLock); 543 if (checkPidAndHardware() != NO_ERROR) return; 544 545 mPreviewCallbackFlag = callback_flag; 546 if (mPreviewCallbackFlag & CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK) { 547 enableMsgType(CAMERA_MSG_PREVIEW_FRAME); 548 } else { 549 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 550 } 551} 552 553// start preview mode 554status_t CameraService::Client::startPreview() { 555 LOG1("startPreview (pid %d)", getCallingPid()); 556 return startCameraMode(CAMERA_PREVIEW_MODE); 557} 558 559// start recording mode 560status_t CameraService::Client::startRecording() { 561 LOG1("startRecording (pid %d)", getCallingPid()); 562 return startCameraMode(CAMERA_RECORDING_MODE); 563} 564 565// start preview or recording 566status_t CameraService::Client::startCameraMode(camera_mode mode) { 567 LOG1("startCameraMode(%d)", mode); 568 Mutex::Autolock lock(mLock); 569 status_t result = checkPidAndHardware(); 570 if (result != NO_ERROR) return result; 571 572 switch(mode) { 573 case CAMERA_PREVIEW_MODE: 574 if (mSurface == 0 && mPreviewWindow == 0) { 575 LOG1("mSurface is not set yet."); 576 // still able to start preview in this case. 577 } 578 return startPreviewMode(); 579 case CAMERA_RECORDING_MODE: 580 if (mSurface == 0 && mPreviewWindow == 0) { 581 LOGE("mSurface or mPreviewWindow must be set before startRecordingMode."); 582 return INVALID_OPERATION; 583 } 584 return startRecordingMode(); 585 default: 586 return UNKNOWN_ERROR; 587 } 588} 589 590status_t CameraService::Client::startPreviewMode() { 591 LOG1("startPreviewMode"); 592 status_t result = NO_ERROR; 593 594 // if preview has been enabled, nothing needs to be done 595 if (mHardware->previewEnabled()) { 596 return NO_ERROR; 597 } 598 599 if (mPreviewWindow != 0) { 600 native_window_set_buffers_transform(mPreviewWindow.get(), 601 mOrientation); 602 } 603 mHardware->setPreviewWindow(mPreviewWindow); 604 result = mHardware->startPreview(); 605 606 return result; 607} 608 609status_t CameraService::Client::startRecordingMode() { 610 LOG1("startRecordingMode"); 611 status_t result = NO_ERROR; 612 613 // if recording has been enabled, nothing needs to be done 614 if (mHardware->recordingEnabled()) { 615 return NO_ERROR; 616 } 617 618 // if preview has not been started, start preview first 619 if (!mHardware->previewEnabled()) { 620 result = startPreviewMode(); 621 if (result != NO_ERROR) { 622 return result; 623 } 624 } 625 626 // start recording mode 627 enableMsgType(CAMERA_MSG_VIDEO_FRAME); 628 mCameraService->playSound(SOUND_RECORDING); 629 result = mHardware->startRecording(); 630 if (result != NO_ERROR) { 631 LOGE("mHardware->startRecording() failed with status %d", result); 632 } 633 return result; 634} 635 636// stop preview mode 637void CameraService::Client::stopPreview() { 638 LOG1("stopPreview (pid %d)", getCallingPid()); 639 Mutex::Autolock lock(mLock); 640 if (checkPidAndHardware() != NO_ERROR) return; 641 642 643 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 644 mHardware->stopPreview(); 645 646 mPreviewBuffer.clear(); 647} 648 649// stop recording mode 650void CameraService::Client::stopRecording() { 651 LOG1("stopRecording (pid %d)", getCallingPid()); 652 Mutex::Autolock lock(mLock); 653 if (checkPidAndHardware() != NO_ERROR) return; 654 655 mCameraService->playSound(SOUND_RECORDING); 656 disableMsgType(CAMERA_MSG_VIDEO_FRAME); 657 mHardware->stopRecording(); 658 659 mPreviewBuffer.clear(); 660} 661 662// release a recording frame 663void CameraService::Client::releaseRecordingFrame(const sp<IMemory>& mem) { 664 Mutex::Autolock lock(mLock); 665 if (checkPidAndHardware() != NO_ERROR) return; 666 mHardware->releaseRecordingFrame(mem); 667} 668 669status_t CameraService::Client::storeMetaDataInBuffers(bool enabled) 670{ 671 LOG1("storeMetaDataInBuffers: %s", enabled? "true": "false"); 672 Mutex::Autolock lock(mLock); 673 if (checkPidAndHardware() != NO_ERROR) { 674 return UNKNOWN_ERROR; 675 } 676 return mHardware->storeMetaDataInBuffers(enabled); 677} 678 679bool CameraService::Client::previewEnabled() { 680 LOG1("previewEnabled (pid %d)", getCallingPid()); 681 682 Mutex::Autolock lock(mLock); 683 if (checkPidAndHardware() != NO_ERROR) return false; 684 return mHardware->previewEnabled(); 685} 686 687bool CameraService::Client::recordingEnabled() { 688 LOG1("recordingEnabled (pid %d)", getCallingPid()); 689 690 Mutex::Autolock lock(mLock); 691 if (checkPidAndHardware() != NO_ERROR) return false; 692 return mHardware->recordingEnabled(); 693} 694 695status_t CameraService::Client::autoFocus() { 696 LOG1("autoFocus (pid %d)", getCallingPid()); 697 698 Mutex::Autolock lock(mLock); 699 status_t result = checkPidAndHardware(); 700 if (result != NO_ERROR) return result; 701 702 return mHardware->autoFocus(); 703} 704 705status_t CameraService::Client::cancelAutoFocus() { 706 LOG1("cancelAutoFocus (pid %d)", getCallingPid()); 707 708 Mutex::Autolock lock(mLock); 709 status_t result = checkPidAndHardware(); 710 if (result != NO_ERROR) return result; 711 712 return mHardware->cancelAutoFocus(); 713} 714 715// take a picture - image is returned in callback 716status_t CameraService::Client::takePicture(int msgType) { 717 LOG1("takePicture (pid %d): 0x%x", getCallingPid(), msgType); 718 719 Mutex::Autolock lock(mLock); 720 status_t result = checkPidAndHardware(); 721 if (result != NO_ERROR) return result; 722 723 if ((msgType & CAMERA_MSG_RAW_IMAGE) && 724 (msgType & CAMERA_MSG_RAW_IMAGE_NOTIFY)) { 725 LOGE("CAMERA_MSG_RAW_IMAGE and CAMERA_MSG_RAW_IMAGE_NOTIFY" 726 " cannot be both enabled"); 727 return BAD_VALUE; 728 } 729 730 // We only accept picture related message types 731 // and ignore other types of messages for takePicture(). 732 int picMsgType = msgType 733 & (CAMERA_MSG_SHUTTER | 734 CAMERA_MSG_POSTVIEW_FRAME | 735 CAMERA_MSG_RAW_IMAGE | 736 CAMERA_MSG_RAW_IMAGE_NOTIFY | 737 CAMERA_MSG_COMPRESSED_IMAGE); 738 739 enableMsgType(picMsgType); 740 741 return mHardware->takePicture(); 742} 743 744// set preview/capture parameters - key/value pairs 745status_t CameraService::Client::setParameters(const String8& params) { 746 LOG1("setParameters (pid %d) (%s)", getCallingPid(), params.string()); 747 748 Mutex::Autolock lock(mLock); 749 status_t result = checkPidAndHardware(); 750 if (result != NO_ERROR) return result; 751 752 CameraParameters p(params); 753 return mHardware->setParameters(p); 754} 755 756// get preview/capture parameters - key/value pairs 757String8 CameraService::Client::getParameters() const { 758 Mutex::Autolock lock(mLock); 759 if (checkPidAndHardware() != NO_ERROR) return String8(); 760 761 String8 params(mHardware->getParameters().flatten()); 762 LOG1("getParameters (pid %d) (%s)", getCallingPid(), params.string()); 763 return params; 764} 765 766// enable shutter sound 767status_t CameraService::Client::enableShutterSound(bool enable) { 768 LOG1("enableShutterSound (pid %d)", getCallingPid()); 769 770 status_t result = checkPidAndHardware(); 771 if (result != NO_ERROR) return result; 772 773 if (enable) { 774 mPlayShutterSound = true; 775 return OK; 776 } 777 778 // Disabling shutter sound may not be allowed. In that case only 779 // allow the mediaserver process to disable the sound. 780 char value[PROPERTY_VALUE_MAX]; 781 property_get("ro.camera.sound.forced", value, "0"); 782 if (strcmp(value, "0") != 0) { 783 // Disabling shutter sound is not allowed. Deny if the current 784 // process is not mediaserver. 785 if (getCallingPid() != getpid()) { 786 LOGE("Failed to disable shutter sound. Permission denied (pid %d)", getCallingPid()); 787 return PERMISSION_DENIED; 788 } 789 } 790 791 mPlayShutterSound = false; 792 return OK; 793} 794 795status_t CameraService::Client::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) { 796 LOG1("sendCommand (pid %d)", getCallingPid()); 797 int orientation; 798 Mutex::Autolock lock(mLock); 799 status_t result = checkPidAndHardware(); 800 if (result != NO_ERROR) return result; 801 802 if (cmd == CAMERA_CMD_SET_DISPLAY_ORIENTATION) { 803 // The orientation cannot be set during preview. 804 if (mHardware->previewEnabled()) { 805 return INVALID_OPERATION; 806 } 807 // Mirror the preview if the camera is front-facing. 808 orientation = getOrientation(arg1, mCameraFacing == CAMERA_FACING_FRONT); 809 if (orientation == -1) return BAD_VALUE; 810 811 if (mOrientation != orientation) { 812 mOrientation = orientation; 813 } 814 return OK; 815 } else if (cmd == CAMERA_CMD_ENABLE_SHUTTER_SOUND) { 816 switch (arg1) { 817 case 0: 818 enableShutterSound(false); 819 break; 820 case 1: 821 enableShutterSound(true); 822 break; 823 default: 824 return BAD_VALUE; 825 } 826 return OK; 827 } else if (cmd == CAMERA_CMD_PLAY_RECORDING_SOUND) { 828 mCameraService->playSound(SOUND_RECORDING); 829 } 830 831 return mHardware->sendCommand(cmd, arg1, arg2); 832} 833 834// ---------------------------------------------------------------------------- 835 836void CameraService::Client::enableMsgType(int32_t msgType) { 837 android_atomic_or(msgType, &mMsgEnabled); 838 mHardware->enableMsgType(msgType); 839} 840 841void CameraService::Client::disableMsgType(int32_t msgType) { 842 android_atomic_and(~msgType, &mMsgEnabled); 843 mHardware->disableMsgType(msgType); 844} 845 846#define CHECK_MESSAGE_INTERVAL 10 // 10ms 847bool CameraService::Client::lockIfMessageWanted(int32_t msgType) { 848 int sleepCount = 0; 849 while (mMsgEnabled & msgType) { 850 if (mLock.tryLock() == NO_ERROR) { 851 if (sleepCount > 0) { 852 LOG1("lockIfMessageWanted(%d): waited for %d ms", 853 msgType, sleepCount * CHECK_MESSAGE_INTERVAL); 854 } 855 return true; 856 } 857 if (sleepCount++ == 0) { 858 LOG1("lockIfMessageWanted(%d): enter sleep", msgType); 859 } 860 usleep(CHECK_MESSAGE_INTERVAL * 1000); 861 } 862 LOGW("lockIfMessageWanted(%d): dropped unwanted message", msgType); 863 return false; 864} 865 866// ---------------------------------------------------------------------------- 867 868// Converts from a raw pointer to the client to a strong pointer during a 869// hardware callback. This requires the callbacks only happen when the client 870// is still alive. 871sp<CameraService::Client> CameraService::Client::getClientFromCookie(void* user) { 872 sp<Client> client = gCameraService->getClientById((int) user); 873 874 // This could happen if the Client is in the process of shutting down (the 875 // last strong reference is gone, but the destructor hasn't finished 876 // stopping the hardware). 877 if (client == 0) return NULL; 878 879 // The checks below are not necessary and are for debugging only. 880 if (client->mCameraService.get() != gCameraService) { 881 LOGE("mismatch service!"); 882 return NULL; 883 } 884 885 if (client->mHardware == 0) { 886 LOGE("mHardware == 0: callback after disconnect()?"); 887 return NULL; 888 } 889 890 return client; 891} 892 893// Callback messages can be dispatched to internal handlers or pass to our 894// client's callback functions, depending on the message type. 895// 896// notifyCallback: 897// CAMERA_MSG_SHUTTER handleShutter 898// (others) c->notifyCallback 899// dataCallback: 900// CAMERA_MSG_PREVIEW_FRAME handlePreviewData 901// CAMERA_MSG_POSTVIEW_FRAME handlePostview 902// CAMERA_MSG_RAW_IMAGE handleRawPicture 903// CAMERA_MSG_COMPRESSED_IMAGE handleCompressedPicture 904// (others) c->dataCallback 905// dataCallbackTimestamp 906// (others) c->dataCallbackTimestamp 907// 908// NOTE: the *Callback functions grab mLock of the client before passing 909// control to handle* functions. So the handle* functions must release the 910// lock before calling the ICameraClient's callbacks, so those callbacks can 911// invoke methods in the Client class again (For example, the preview frame 912// callback may want to releaseRecordingFrame). The handle* functions must 913// release the lock after all accesses to member variables, so it must be 914// handled very carefully. 915 916void CameraService::Client::notifyCallback(int32_t msgType, int32_t ext1, 917 int32_t ext2, void* user) { 918 LOG2("notifyCallback(%d)", msgType); 919 920 sp<Client> client = getClientFromCookie(user); 921 if (client == 0) return; 922 if (!client->lockIfMessageWanted(msgType)) return; 923 924 switch (msgType) { 925 case CAMERA_MSG_SHUTTER: 926 // ext1 is the dimension of the yuv picture. 927 client->handleShutter(); 928 break; 929 default: 930 client->handleGenericNotify(msgType, ext1, ext2); 931 break; 932 } 933} 934 935void CameraService::Client::dataCallback(int32_t msgType, 936 const sp<IMemory>& dataPtr, void* user) { 937 LOG2("dataCallback(%d)", msgType); 938 939 sp<Client> client = getClientFromCookie(user); 940 if (client == 0) return; 941 if (!client->lockIfMessageWanted(msgType)) return; 942 943 if (dataPtr == 0) { 944 LOGE("Null data returned in data callback"); 945 client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); 946 return; 947 } 948 949 switch (msgType) { 950 case CAMERA_MSG_PREVIEW_FRAME: 951 client->handlePreviewData(dataPtr); 952 break; 953 case CAMERA_MSG_POSTVIEW_FRAME: 954 client->handlePostview(dataPtr); 955 break; 956 case CAMERA_MSG_RAW_IMAGE: 957 client->handleRawPicture(dataPtr); 958 break; 959 case CAMERA_MSG_COMPRESSED_IMAGE: 960 client->handleCompressedPicture(dataPtr); 961 break; 962 default: 963 client->handleGenericData(msgType, dataPtr); 964 break; 965 } 966} 967 968void CameraService::Client::dataCallbackTimestamp(nsecs_t timestamp, 969 int32_t msgType, const sp<IMemory>& dataPtr, void* user) { 970 LOG2("dataCallbackTimestamp(%d)", msgType); 971 972 sp<Client> client = getClientFromCookie(user); 973 if (client == 0) return; 974 if (!client->lockIfMessageWanted(msgType)) return; 975 976 if (dataPtr == 0) { 977 LOGE("Null data returned in data with timestamp callback"); 978 client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); 979 return; 980 } 981 982 client->handleGenericDataTimestamp(timestamp, msgType, dataPtr); 983} 984 985// snapshot taken callback 986void CameraService::Client::handleShutter(void) { 987 if (mPlayShutterSound) { 988 mCameraService->playSound(SOUND_SHUTTER); 989 } 990 991 sp<ICameraClient> c = mCameraClient; 992 if (c != 0) { 993 mLock.unlock(); 994 c->notifyCallback(CAMERA_MSG_SHUTTER, 0, 0); 995 if (!lockIfMessageWanted(CAMERA_MSG_SHUTTER)) return; 996 } 997 disableMsgType(CAMERA_MSG_SHUTTER); 998 999 mLock.unlock(); 1000} 1001 1002// preview callback - frame buffer update 1003void CameraService::Client::handlePreviewData(const sp<IMemory>& mem) { 1004 ssize_t offset; 1005 size_t size; 1006 sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); 1007 1008 // local copy of the callback flags 1009 int flags = mPreviewCallbackFlag; 1010 1011 // is callback enabled? 1012 if (!(flags & CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK)) { 1013 // If the enable bit is off, the copy-out and one-shot bits are ignored 1014 LOG2("frame callback is disabled"); 1015 mLock.unlock(); 1016 return; 1017 } 1018 1019 // hold a strong pointer to the client 1020 sp<ICameraClient> c = mCameraClient; 1021 1022 // clear callback flags if no client or one-shot mode 1023 if (c == 0 || (mPreviewCallbackFlag & CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK)) { 1024 LOG2("Disable preview callback"); 1025 mPreviewCallbackFlag &= ~(CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK | 1026 CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK | 1027 CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK); 1028 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 1029 } 1030 1031 if (c != 0) { 1032 // Is the received frame copied out or not? 1033 if (flags & CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK) { 1034 LOG2("frame is copied"); 1035 copyFrameAndPostCopiedFrame(c, heap, offset, size); 1036 } else { 1037 LOG2("frame is forwarded"); 1038 mLock.unlock(); 1039 c->dataCallback(CAMERA_MSG_PREVIEW_FRAME, mem); 1040 } 1041 } else { 1042 mLock.unlock(); 1043 } 1044} 1045 1046// picture callback - postview image ready 1047void CameraService::Client::handlePostview(const sp<IMemory>& mem) { 1048 disableMsgType(CAMERA_MSG_POSTVIEW_FRAME); 1049 1050 sp<ICameraClient> c = mCameraClient; 1051 mLock.unlock(); 1052 if (c != 0) { 1053 c->dataCallback(CAMERA_MSG_POSTVIEW_FRAME, mem); 1054 } 1055} 1056 1057// picture callback - raw image ready 1058void CameraService::Client::handleRawPicture(const sp<IMemory>& mem) { 1059 disableMsgType(CAMERA_MSG_RAW_IMAGE); 1060 1061 ssize_t offset; 1062 size_t size; 1063 sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); 1064 1065 sp<ICameraClient> c = mCameraClient; 1066 mLock.unlock(); 1067 if (c != 0) { 1068 c->dataCallback(CAMERA_MSG_RAW_IMAGE, mem); 1069 } 1070} 1071 1072// picture callback - compressed picture ready 1073void CameraService::Client::handleCompressedPicture(const sp<IMemory>& mem) { 1074 disableMsgType(CAMERA_MSG_COMPRESSED_IMAGE); 1075 1076 sp<ICameraClient> c = mCameraClient; 1077 mLock.unlock(); 1078 if (c != 0) { 1079 c->dataCallback(CAMERA_MSG_COMPRESSED_IMAGE, mem); 1080 } 1081} 1082 1083 1084void CameraService::Client::handleGenericNotify(int32_t msgType, 1085 int32_t ext1, int32_t ext2) { 1086 sp<ICameraClient> c = mCameraClient; 1087 mLock.unlock(); 1088 if (c != 0) { 1089 c->notifyCallback(msgType, ext1, ext2); 1090 } 1091} 1092 1093void CameraService::Client::handleGenericData(int32_t msgType, 1094 const sp<IMemory>& dataPtr) { 1095 sp<ICameraClient> c = mCameraClient; 1096 mLock.unlock(); 1097 if (c != 0) { 1098 c->dataCallback(msgType, dataPtr); 1099 } 1100} 1101 1102void CameraService::Client::handleGenericDataTimestamp(nsecs_t timestamp, 1103 int32_t msgType, const sp<IMemory>& dataPtr) { 1104 sp<ICameraClient> c = mCameraClient; 1105 mLock.unlock(); 1106 if (c != 0) { 1107 c->dataCallbackTimestamp(timestamp, msgType, dataPtr); 1108 } 1109} 1110 1111void CameraService::Client::copyFrameAndPostCopiedFrame( 1112 const sp<ICameraClient>& client, const sp<IMemoryHeap>& heap, 1113 size_t offset, size_t size) { 1114 LOG2("copyFrameAndPostCopiedFrame"); 1115 // It is necessary to copy out of pmem before sending this to 1116 // the callback. For efficiency, reuse the same MemoryHeapBase 1117 // provided it's big enough. Don't allocate the memory or 1118 // perform the copy if there's no callback. 1119 // hold the preview lock while we grab a reference to the preview buffer 1120 sp<MemoryHeapBase> previewBuffer; 1121 1122 if (mPreviewBuffer == 0) { 1123 mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); 1124 } else if (size > mPreviewBuffer->virtualSize()) { 1125 mPreviewBuffer.clear(); 1126 mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); 1127 } 1128 if (mPreviewBuffer == 0) { 1129 LOGE("failed to allocate space for preview buffer"); 1130 mLock.unlock(); 1131 return; 1132 } 1133 previewBuffer = mPreviewBuffer; 1134 1135 memcpy(previewBuffer->base(), (uint8_t *)heap->base() + offset, size); 1136 1137 sp<MemoryBase> frame = new MemoryBase(previewBuffer, 0, size); 1138 if (frame == 0) { 1139 LOGE("failed to allocate space for frame callback"); 1140 mLock.unlock(); 1141 return; 1142 } 1143 1144 mLock.unlock(); 1145 client->dataCallback(CAMERA_MSG_PREVIEW_FRAME, frame); 1146} 1147 1148int CameraService::Client::getOrientation(int degrees, bool mirror) { 1149 if (!mirror) { 1150 if (degrees == 0) return 0; 1151 else if (degrees == 90) return HAL_TRANSFORM_ROT_90; 1152 else if (degrees == 180) return HAL_TRANSFORM_ROT_180; 1153 else if (degrees == 270) return HAL_TRANSFORM_ROT_270; 1154 } else { // Do mirror (horizontal flip) 1155 if (degrees == 0) { // FLIP_H and ROT_0 1156 return HAL_TRANSFORM_FLIP_H; 1157 } else if (degrees == 90) { // FLIP_H and ROT_90 1158 return HAL_TRANSFORM_FLIP_H | HAL_TRANSFORM_ROT_90; 1159 } else if (degrees == 180) { // FLIP_H and ROT_180 1160 return HAL_TRANSFORM_FLIP_V; 1161 } else if (degrees == 270) { // FLIP_H and ROT_270 1162 return HAL_TRANSFORM_FLIP_V | HAL_TRANSFORM_ROT_90; 1163 } 1164 } 1165 LOGE("Invalid setDisplayOrientation degrees=%d", degrees); 1166 return -1; 1167} 1168 1169 1170// ---------------------------------------------------------------------------- 1171 1172static const int kDumpLockRetries = 50; 1173static const int kDumpLockSleep = 60000; 1174 1175static bool tryLock(Mutex& mutex) 1176{ 1177 bool locked = false; 1178 for (int i = 0; i < kDumpLockRetries; ++i) { 1179 if (mutex.tryLock() == NO_ERROR) { 1180 locked = true; 1181 break; 1182 } 1183 usleep(kDumpLockSleep); 1184 } 1185 return locked; 1186} 1187 1188status_t CameraService::dump(int fd, const Vector<String16>& args) { 1189 static const char* kDeadlockedString = "CameraService may be deadlocked\n"; 1190 1191 const size_t SIZE = 256; 1192 char buffer[SIZE]; 1193 String8 result; 1194 if (checkCallingPermission(String16("android.permission.DUMP")) == false) { 1195 snprintf(buffer, SIZE, "Permission Denial: " 1196 "can't dump CameraService from pid=%d, uid=%d\n", 1197 getCallingPid(), 1198 getCallingUid()); 1199 result.append(buffer); 1200 write(fd, result.string(), result.size()); 1201 } else { 1202 bool locked = tryLock(mServiceLock); 1203 // failed to lock - CameraService is probably deadlocked 1204 if (!locked) { 1205 String8 result(kDeadlockedString); 1206 write(fd, result.string(), result.size()); 1207 } 1208 1209 bool hasClient = false; 1210 for (int i = 0; i < mNumberOfCameras; i++) { 1211 sp<Client> client = mClient[i].promote(); 1212 if (client == 0) continue; 1213 hasClient = true; 1214 sprintf(buffer, "Client[%d] (%p) PID: %d\n", 1215 i, 1216 client->getCameraClient()->asBinder().get(), 1217 client->mClientPid); 1218 result.append(buffer); 1219 write(fd, result.string(), result.size()); 1220 client->mHardware->dump(fd, args); 1221 } 1222 if (!hasClient) { 1223 result.append("No camera client yet.\n"); 1224 write(fd, result.string(), result.size()); 1225 } 1226 1227 if (locked) mServiceLock.unlock(); 1228 1229 // change logging level 1230 int n = args.size(); 1231 for (int i = 0; i + 1 < n; i++) { 1232 if (args[i] == String16("-v")) { 1233 String8 levelStr(args[i+1]); 1234 int level = atoi(levelStr.string()); 1235 sprintf(buffer, "Set Log Level to %d", level); 1236 result.append(buffer); 1237 setLogLevel(level); 1238 } 1239 } 1240 } 1241 return NO_ERROR; 1242} 1243 1244}; // namespace android 1245