CameraService.cpp revision 57c86189bc07d9ccb0fd044e66df736d0bf19639
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, focus, and metadata messages by default 354 enableMsgType(CAMERA_MSG_ERROR | CAMERA_MSG_ZOOM | CAMERA_MSG_FOCUS | 355 CAMERA_MSG_PREVIEW_METADATA); 356 357 // Callback is disabled by default 358 mPreviewCallbackFlag = CAMERA_FRAME_CALLBACK_FLAG_NOOP; 359 mOrientation = getOrientation(0, mCameraFacing == CAMERA_FACING_FRONT); 360 mPlayShutterSound = true; 361 cameraService->setCameraBusy(cameraId); 362 cameraService->loadSound(); 363 LOG1("Client::Client X (pid %d)", callingPid); 364} 365 366// tear down the client 367CameraService::Client::~Client() { 368 int callingPid = getCallingPid(); 369 LOG1("Client::~Client E (pid %d, this %p)", callingPid, this); 370 371 // set mClientPid to let disconnet() tear down the hardware 372 mClientPid = callingPid; 373 disconnect(); 374 mCameraService->releaseSound(); 375 LOG1("Client::~Client X (pid %d, this %p)", callingPid, this); 376} 377 378// ---------------------------------------------------------------------------- 379 380status_t CameraService::Client::checkPid() const { 381 int callingPid = getCallingPid(); 382 if (callingPid == mClientPid) return NO_ERROR; 383 384 LOGW("attempt to use a locked camera from a different process" 385 " (old pid %d, new pid %d)", mClientPid, callingPid); 386 return EBUSY; 387} 388 389status_t CameraService::Client::checkPidAndHardware() const { 390 status_t result = checkPid(); 391 if (result != NO_ERROR) return result; 392 if (mHardware == 0) { 393 LOGE("attempt to use a camera after disconnect() (pid %d)", getCallingPid()); 394 return INVALID_OPERATION; 395 } 396 return NO_ERROR; 397} 398 399status_t CameraService::Client::lock() { 400 int callingPid = getCallingPid(); 401 LOG1("lock (pid %d)", callingPid); 402 Mutex::Autolock lock(mLock); 403 404 // lock camera to this client if the the camera is unlocked 405 if (mClientPid == 0) { 406 mClientPid = callingPid; 407 return NO_ERROR; 408 } 409 410 // returns NO_ERROR if the client already owns the camera, EBUSY otherwise 411 return checkPid(); 412} 413 414status_t CameraService::Client::unlock() { 415 int callingPid = getCallingPid(); 416 LOG1("unlock (pid %d)", callingPid); 417 Mutex::Autolock lock(mLock); 418 419 // allow anyone to use camera (after they lock the camera) 420 status_t result = checkPid(); 421 if (result == NO_ERROR) { 422 if (mHardware->recordingEnabled()) { 423 LOGE("Not allowed to unlock camera during recording."); 424 return INVALID_OPERATION; 425 } 426 mClientPid = 0; 427 LOG1("clear mCameraClient (pid %d)", callingPid); 428 // we need to remove the reference to ICameraClient so that when the app 429 // goes away, the reference count goes to 0. 430 mCameraClient.clear(); 431 } 432 return result; 433} 434 435// connect a new client to the camera 436status_t CameraService::Client::connect(const sp<ICameraClient>& client) { 437 int callingPid = getCallingPid(); 438 LOG1("connect E (pid %d)", callingPid); 439 Mutex::Autolock lock(mLock); 440 441 if (mClientPid != 0 && checkPid() != NO_ERROR) { 442 LOGW("Tried to connect to a locked camera (old pid %d, new pid %d)", 443 mClientPid, callingPid); 444 return EBUSY; 445 } 446 447 if (mCameraClient != 0 && (client->asBinder() == mCameraClient->asBinder())) { 448 LOG1("Connect to the same client"); 449 return NO_ERROR; 450 } 451 452 mPreviewCallbackFlag = CAMERA_FRAME_CALLBACK_FLAG_NOOP; 453 mClientPid = callingPid; 454 mCameraClient = client; 455 456 LOG1("connect X (pid %d)", callingPid); 457 return NO_ERROR; 458} 459 460static void disconnectWindow(const sp<ANativeWindow>& window) { 461 if (window != 0) { 462 status_t result = native_window_api_disconnect(window.get(), 463 NATIVE_WINDOW_API_CAMERA); 464 if (result != NO_ERROR) { 465 LOGW("native_window_api_disconnect failed: %s (%d)", strerror(-result), 466 result); 467 } 468 } 469} 470 471void CameraService::Client::disconnect() { 472 int callingPid = getCallingPid(); 473 LOG1("disconnect E (pid %d)", callingPid); 474 Mutex::Autolock lock(mLock); 475 476 if (checkPid() != NO_ERROR) { 477 LOGW("different client - don't disconnect"); 478 return; 479 } 480 481 if (mClientPid <= 0) { 482 LOG1("camera is unlocked (mClientPid = %d), don't tear down hardware", mClientPid); 483 return; 484 } 485 486 // Make sure disconnect() is done once and once only, whether it is called 487 // from the user directly, or called by the destructor. 488 if (mHardware == 0) return; 489 490 LOG1("hardware teardown"); 491 // Before destroying mHardware, we must make sure it's in the 492 // idle state. 493 // Turn off all messages. 494 disableMsgType(CAMERA_MSG_ALL_MSGS); 495 mHardware->stopPreview(); 496 mHardware->cancelPicture(); 497 // Release the hardware resources. 498 mHardware->release(); 499 500 // Release the held ANativeWindow resources. 501 if (mPreviewWindow != 0) { 502 disconnectWindow(mPreviewWindow); 503 mPreviewWindow = 0; 504 mHardware->setPreviewWindow(mPreviewWindow); 505 } 506 mHardware.clear(); 507 508 mCameraService->removeClient(mCameraClient); 509 mCameraService->setCameraFree(mCameraId); 510 511 LOG1("disconnect X (pid %d)", callingPid); 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_api_connect(window.get(), NATIVE_WINDOW_API_CAMERA); 529 if (result != NO_ERROR) { 530 LOGE("native_window_api_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_scaling_mode(window.get(), 540 NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW); 541 native_window_set_buffers_transform(window.get(), mOrientation); 542 result = mHardware->setPreviewWindow(window); 543 } 544 } 545 546 if (result == NO_ERROR) { 547 // Everything has succeeded. Disconnect the old window and remember the 548 // new window. 549 disconnectWindow(mPreviewWindow); 550 mSurface = binder; 551 mPreviewWindow = window; 552 } else { 553 // Something went wrong after we connected to the new window, so 554 // disconnect here. 555 disconnectWindow(window); 556 } 557 558 return result; 559} 560 561// set the Surface that the preview will use 562status_t CameraService::Client::setPreviewDisplay(const sp<Surface>& surface) { 563 LOG1("setPreviewDisplay(%p) (pid %d)", surface.get(), getCallingPid()); 564 565 sp<IBinder> binder(surface != 0 ? surface->asBinder() : 0); 566 sp<ANativeWindow> window(surface); 567 return setPreviewWindow(binder, window); 568} 569 570// set the SurfaceTexture that the preview will use 571status_t CameraService::Client::setPreviewTexture( 572 const sp<ISurfaceTexture>& surfaceTexture) { 573 LOG1("setPreviewTexture(%p) (pid %d)", surfaceTexture.get(), 574 getCallingPid()); 575 576 sp<IBinder> binder; 577 sp<ANativeWindow> window; 578 if (surfaceTexture != 0) { 579 binder = surfaceTexture->asBinder(); 580 window = new SurfaceTextureClient(surfaceTexture); 581 } 582 return setPreviewWindow(binder, window); 583} 584 585// set the preview callback flag to affect how the received frames from 586// preview are handled. 587void CameraService::Client::setPreviewCallbackFlag(int callback_flag) { 588 LOG1("setPreviewCallbackFlag(%d) (pid %d)", callback_flag, getCallingPid()); 589 Mutex::Autolock lock(mLock); 590 if (checkPidAndHardware() != NO_ERROR) return; 591 592 mPreviewCallbackFlag = callback_flag; 593 if (mPreviewCallbackFlag & CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK) { 594 enableMsgType(CAMERA_MSG_PREVIEW_FRAME); 595 } else { 596 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 597 } 598} 599 600// start preview mode 601status_t CameraService::Client::startPreview() { 602 LOG1("startPreview (pid %d)", getCallingPid()); 603 return startCameraMode(CAMERA_PREVIEW_MODE); 604} 605 606// start recording mode 607status_t CameraService::Client::startRecording() { 608 LOG1("startRecording (pid %d)", getCallingPid()); 609 return startCameraMode(CAMERA_RECORDING_MODE); 610} 611 612// start preview or recording 613status_t CameraService::Client::startCameraMode(camera_mode mode) { 614 LOG1("startCameraMode(%d)", mode); 615 Mutex::Autolock lock(mLock); 616 status_t result = checkPidAndHardware(); 617 if (result != NO_ERROR) return result; 618 619 switch(mode) { 620 case CAMERA_PREVIEW_MODE: 621 if (mSurface == 0 && mPreviewWindow == 0) { 622 LOG1("mSurface is not set yet."); 623 // still able to start preview in this case. 624 } 625 return startPreviewMode(); 626 case CAMERA_RECORDING_MODE: 627 if (mSurface == 0 && mPreviewWindow == 0) { 628 LOGE("mSurface or mPreviewWindow must be set before startRecordingMode."); 629 return INVALID_OPERATION; 630 } 631 return startRecordingMode(); 632 default: 633 return UNKNOWN_ERROR; 634 } 635} 636 637status_t CameraService::Client::startPreviewMode() { 638 LOG1("startPreviewMode"); 639 status_t result = NO_ERROR; 640 641 // if preview has been enabled, nothing needs to be done 642 if (mHardware->previewEnabled()) { 643 return NO_ERROR; 644 } 645 646 if (mPreviewWindow != 0) { 647 native_window_set_scaling_mode(mPreviewWindow.get(), 648 NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW); 649 native_window_set_buffers_transform(mPreviewWindow.get(), 650 mOrientation); 651 } 652 mHardware->setPreviewWindow(mPreviewWindow); 653 result = mHardware->startPreview(); 654 655 return result; 656} 657 658status_t CameraService::Client::startRecordingMode() { 659 LOG1("startRecordingMode"); 660 status_t result = NO_ERROR; 661 662 // if recording has been enabled, nothing needs to be done 663 if (mHardware->recordingEnabled()) { 664 return NO_ERROR; 665 } 666 667 // if preview has not been started, start preview first 668 if (!mHardware->previewEnabled()) { 669 result = startPreviewMode(); 670 if (result != NO_ERROR) { 671 return result; 672 } 673 } 674 675 // start recording mode 676 enableMsgType(CAMERA_MSG_VIDEO_FRAME); 677 mCameraService->playSound(SOUND_RECORDING); 678 result = mHardware->startRecording(); 679 if (result != NO_ERROR) { 680 LOGE("mHardware->startRecording() failed with status %d", result); 681 } 682 return result; 683} 684 685// stop preview mode 686void CameraService::Client::stopPreview() { 687 LOG1("stopPreview (pid %d)", getCallingPid()); 688 Mutex::Autolock lock(mLock); 689 if (checkPidAndHardware() != NO_ERROR) return; 690 691 692 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 693 mHardware->stopPreview(); 694 695 mPreviewBuffer.clear(); 696} 697 698// stop recording mode 699void CameraService::Client::stopRecording() { 700 LOG1("stopRecording (pid %d)", getCallingPid()); 701 Mutex::Autolock lock(mLock); 702 if (checkPidAndHardware() != NO_ERROR) return; 703 704 mCameraService->playSound(SOUND_RECORDING); 705 disableMsgType(CAMERA_MSG_VIDEO_FRAME); 706 mHardware->stopRecording(); 707 708 mPreviewBuffer.clear(); 709} 710 711// release a recording frame 712void CameraService::Client::releaseRecordingFrame(const sp<IMemory>& mem) { 713 Mutex::Autolock lock(mLock); 714 if (checkPidAndHardware() != NO_ERROR) return; 715 mHardware->releaseRecordingFrame(mem); 716} 717 718status_t CameraService::Client::storeMetaDataInBuffers(bool enabled) 719{ 720 LOG1("storeMetaDataInBuffers: %s", enabled? "true": "false"); 721 Mutex::Autolock lock(mLock); 722 if (checkPidAndHardware() != NO_ERROR) { 723 return UNKNOWN_ERROR; 724 } 725 return mHardware->storeMetaDataInBuffers(enabled); 726} 727 728bool CameraService::Client::previewEnabled() { 729 LOG1("previewEnabled (pid %d)", getCallingPid()); 730 731 Mutex::Autolock lock(mLock); 732 if (checkPidAndHardware() != NO_ERROR) return false; 733 return mHardware->previewEnabled(); 734} 735 736bool CameraService::Client::recordingEnabled() { 737 LOG1("recordingEnabled (pid %d)", getCallingPid()); 738 739 Mutex::Autolock lock(mLock); 740 if (checkPidAndHardware() != NO_ERROR) return false; 741 return mHardware->recordingEnabled(); 742} 743 744status_t CameraService::Client::autoFocus() { 745 LOG1("autoFocus (pid %d)", getCallingPid()); 746 747 Mutex::Autolock lock(mLock); 748 status_t result = checkPidAndHardware(); 749 if (result != NO_ERROR) return result; 750 751 return mHardware->autoFocus(); 752} 753 754status_t CameraService::Client::cancelAutoFocus() { 755 LOG1("cancelAutoFocus (pid %d)", getCallingPid()); 756 757 Mutex::Autolock lock(mLock); 758 status_t result = checkPidAndHardware(); 759 if (result != NO_ERROR) return result; 760 761 return mHardware->cancelAutoFocus(); 762} 763 764// take a picture - image is returned in callback 765status_t CameraService::Client::takePicture(int msgType) { 766 LOG1("takePicture (pid %d): 0x%x", getCallingPid(), msgType); 767 768 Mutex::Autolock lock(mLock); 769 status_t result = checkPidAndHardware(); 770 if (result != NO_ERROR) return result; 771 772 if (mHardware->recordingEnabled()) { 773 LOGE("Cannot take picture during recording."); 774 return INVALID_OPERATION; 775 } 776 777 if ((msgType & CAMERA_MSG_RAW_IMAGE) && 778 (msgType & CAMERA_MSG_RAW_IMAGE_NOTIFY)) { 779 LOGE("CAMERA_MSG_RAW_IMAGE and CAMERA_MSG_RAW_IMAGE_NOTIFY" 780 " cannot be both enabled"); 781 return BAD_VALUE; 782 } 783 784 // We only accept picture related message types 785 // and ignore other types of messages for takePicture(). 786 int picMsgType = msgType 787 & (CAMERA_MSG_SHUTTER | 788 CAMERA_MSG_POSTVIEW_FRAME | 789 CAMERA_MSG_RAW_IMAGE | 790 CAMERA_MSG_RAW_IMAGE_NOTIFY | 791 CAMERA_MSG_COMPRESSED_IMAGE); 792 793 enableMsgType(picMsgType); 794 795 return mHardware->takePicture(); 796} 797 798// set preview/capture parameters - key/value pairs 799status_t CameraService::Client::setParameters(const String8& params) { 800 LOG1("setParameters (pid %d) (%s)", getCallingPid(), params.string()); 801 802 Mutex::Autolock lock(mLock); 803 status_t result = checkPidAndHardware(); 804 if (result != NO_ERROR) return result; 805 806 CameraParameters p(params); 807 return mHardware->setParameters(p); 808} 809 810// get preview/capture parameters - key/value pairs 811String8 CameraService::Client::getParameters() const { 812 Mutex::Autolock lock(mLock); 813 if (checkPidAndHardware() != NO_ERROR) return String8(); 814 815 String8 params(mHardware->getParameters().flatten()); 816 LOG1("getParameters (pid %d) (%s)", getCallingPid(), params.string()); 817 return params; 818} 819 820// enable shutter sound 821status_t CameraService::Client::enableShutterSound(bool enable) { 822 LOG1("enableShutterSound (pid %d)", getCallingPid()); 823 824 status_t result = checkPidAndHardware(); 825 if (result != NO_ERROR) return result; 826 827 if (enable) { 828 mPlayShutterSound = true; 829 return OK; 830 } 831 832 // Disabling shutter sound may not be allowed. In that case only 833 // allow the mediaserver process to disable the sound. 834 char value[PROPERTY_VALUE_MAX]; 835 property_get("ro.camera.sound.forced", value, "0"); 836 if (strcmp(value, "0") != 0) { 837 // Disabling shutter sound is not allowed. Deny if the current 838 // process is not mediaserver. 839 if (getCallingPid() != getpid()) { 840 LOGE("Failed to disable shutter sound. Permission denied (pid %d)", getCallingPid()); 841 return PERMISSION_DENIED; 842 } 843 } 844 845 mPlayShutterSound = false; 846 return OK; 847} 848 849status_t CameraService::Client::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) { 850 LOG1("sendCommand (pid %d)", getCallingPid()); 851 int orientation; 852 Mutex::Autolock lock(mLock); 853 status_t result = checkPidAndHardware(); 854 if (result != NO_ERROR) return result; 855 856 if (cmd == CAMERA_CMD_SET_DISPLAY_ORIENTATION) { 857 // The orientation cannot be set during preview. 858 if (mHardware->previewEnabled()) { 859 return INVALID_OPERATION; 860 } 861 // Mirror the preview if the camera is front-facing. 862 orientation = getOrientation(arg1, mCameraFacing == CAMERA_FACING_FRONT); 863 if (orientation == -1) return BAD_VALUE; 864 865 if (mOrientation != orientation) { 866 mOrientation = orientation; 867 } 868 return OK; 869 } else if (cmd == CAMERA_CMD_ENABLE_SHUTTER_SOUND) { 870 switch (arg1) { 871 case 0: 872 enableShutterSound(false); 873 break; 874 case 1: 875 enableShutterSound(true); 876 break; 877 default: 878 return BAD_VALUE; 879 } 880 return OK; 881 } else if (cmd == CAMERA_CMD_PLAY_RECORDING_SOUND) { 882 mCameraService->playSound(SOUND_RECORDING); 883 } 884 885 return mHardware->sendCommand(cmd, arg1, arg2); 886} 887 888// ---------------------------------------------------------------------------- 889 890void CameraService::Client::enableMsgType(int32_t msgType) { 891 android_atomic_or(msgType, &mMsgEnabled); 892 mHardware->enableMsgType(msgType); 893} 894 895void CameraService::Client::disableMsgType(int32_t msgType) { 896 android_atomic_and(~msgType, &mMsgEnabled); 897 mHardware->disableMsgType(msgType); 898} 899 900#define CHECK_MESSAGE_INTERVAL 10 // 10ms 901bool CameraService::Client::lockIfMessageWanted(int32_t msgType) { 902 int sleepCount = 0; 903 while (mMsgEnabled & msgType) { 904 if (mLock.tryLock() == NO_ERROR) { 905 if (sleepCount > 0) { 906 LOG1("lockIfMessageWanted(%d): waited for %d ms", 907 msgType, sleepCount * CHECK_MESSAGE_INTERVAL); 908 } 909 return true; 910 } 911 if (sleepCount++ == 0) { 912 LOG1("lockIfMessageWanted(%d): enter sleep", msgType); 913 } 914 usleep(CHECK_MESSAGE_INTERVAL * 1000); 915 } 916 LOGW("lockIfMessageWanted(%d): dropped unwanted message", msgType); 917 return false; 918} 919 920// ---------------------------------------------------------------------------- 921 922// Converts from a raw pointer to the client to a strong pointer during a 923// hardware callback. This requires the callbacks only happen when the client 924// is still alive. 925sp<CameraService::Client> CameraService::Client::getClientFromCookie(void* user) { 926 sp<Client> client = gCameraService->getClientById((int) user); 927 928 // This could happen if the Client is in the process of shutting down (the 929 // last strong reference is gone, but the destructor hasn't finished 930 // stopping the hardware). 931 if (client == 0) return NULL; 932 933 // The checks below are not necessary and are for debugging only. 934 if (client->mCameraService.get() != gCameraService) { 935 LOGE("mismatch service!"); 936 return NULL; 937 } 938 939 if (client->mHardware == 0) { 940 LOGE("mHardware == 0: callback after disconnect()?"); 941 return NULL; 942 } 943 944 return client; 945} 946 947// Callback messages can be dispatched to internal handlers or pass to our 948// client's callback functions, depending on the message type. 949// 950// notifyCallback: 951// CAMERA_MSG_SHUTTER handleShutter 952// (others) c->notifyCallback 953// dataCallback: 954// CAMERA_MSG_PREVIEW_FRAME handlePreviewData 955// CAMERA_MSG_POSTVIEW_FRAME handlePostview 956// CAMERA_MSG_RAW_IMAGE handleRawPicture 957// CAMERA_MSG_COMPRESSED_IMAGE handleCompressedPicture 958// (others) c->dataCallback 959// dataCallbackTimestamp 960// (others) c->dataCallbackTimestamp 961// 962// NOTE: the *Callback functions grab mLock of the client before passing 963// control to handle* functions. So the handle* functions must release the 964// lock before calling the ICameraClient's callbacks, so those callbacks can 965// invoke methods in the Client class again (For example, the preview frame 966// callback may want to releaseRecordingFrame). The handle* functions must 967// release the lock after all accesses to member variables, so it must be 968// handled very carefully. 969 970void CameraService::Client::notifyCallback(int32_t msgType, int32_t ext1, 971 int32_t ext2, void* user) { 972 LOG2("notifyCallback(%d)", msgType); 973 974 sp<Client> client = getClientFromCookie(user); 975 if (client == 0) return; 976 if (!client->lockIfMessageWanted(msgType)) return; 977 978 switch (msgType) { 979 case CAMERA_MSG_SHUTTER: 980 // ext1 is the dimension of the yuv picture. 981 client->handleShutter(); 982 break; 983 default: 984 client->handleGenericNotify(msgType, ext1, ext2); 985 break; 986 } 987} 988 989void CameraService::Client::dataCallback(int32_t msgType, 990 const sp<IMemory>& dataPtr, camera_frame_metadata_t *metadata, void* user) { 991 LOG2("dataCallback(%d)", msgType); 992 993 sp<Client> client = getClientFromCookie(user); 994 if (client == 0) return; 995 if (!client->lockIfMessageWanted(msgType)) return; 996 997 if (dataPtr == 0 && metadata == NULL) { 998 LOGE("Null data returned in data callback"); 999 client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); 1000 return; 1001 } 1002 1003 switch (msgType & ~CAMERA_MSG_PREVIEW_METADATA) { 1004 case CAMERA_MSG_PREVIEW_FRAME: 1005 client->handlePreviewData(msgType, dataPtr, metadata); 1006 break; 1007 case CAMERA_MSG_POSTVIEW_FRAME: 1008 client->handlePostview(dataPtr); 1009 break; 1010 case CAMERA_MSG_RAW_IMAGE: 1011 client->handleRawPicture(dataPtr); 1012 break; 1013 case CAMERA_MSG_COMPRESSED_IMAGE: 1014 client->handleCompressedPicture(dataPtr); 1015 break; 1016 default: 1017 client->handleGenericData(msgType, dataPtr, metadata); 1018 break; 1019 } 1020} 1021 1022void CameraService::Client::dataCallbackTimestamp(nsecs_t timestamp, 1023 int32_t msgType, const sp<IMemory>& dataPtr, void* user) { 1024 LOG2("dataCallbackTimestamp(%d)", msgType); 1025 1026 sp<Client> client = getClientFromCookie(user); 1027 if (client == 0) return; 1028 if (!client->lockIfMessageWanted(msgType)) return; 1029 1030 if (dataPtr == 0) { 1031 LOGE("Null data returned in data with timestamp callback"); 1032 client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); 1033 return; 1034 } 1035 1036 client->handleGenericDataTimestamp(timestamp, msgType, dataPtr); 1037} 1038 1039// snapshot taken callback 1040void CameraService::Client::handleShutter(void) { 1041 if (mPlayShutterSound) { 1042 mCameraService->playSound(SOUND_SHUTTER); 1043 } 1044 1045 sp<ICameraClient> c = mCameraClient; 1046 if (c != 0) { 1047 mLock.unlock(); 1048 c->notifyCallback(CAMERA_MSG_SHUTTER, 0, 0); 1049 if (!lockIfMessageWanted(CAMERA_MSG_SHUTTER)) return; 1050 } 1051 disableMsgType(CAMERA_MSG_SHUTTER); 1052 1053 mLock.unlock(); 1054} 1055 1056// preview callback - frame buffer update 1057void CameraService::Client::handlePreviewData(int32_t msgType, 1058 const sp<IMemory>& mem, 1059 camera_frame_metadata_t *metadata) { 1060 ssize_t offset; 1061 size_t size; 1062 sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); 1063 1064 // local copy of the callback flags 1065 int flags = mPreviewCallbackFlag; 1066 1067 // is callback enabled? 1068 if (!(flags & CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK)) { 1069 // If the enable bit is off, the copy-out and one-shot bits are ignored 1070 LOG2("frame callback is disabled"); 1071 mLock.unlock(); 1072 return; 1073 } 1074 1075 // hold a strong pointer to the client 1076 sp<ICameraClient> c = mCameraClient; 1077 1078 // clear callback flags if no client or one-shot mode 1079 if (c == 0 || (mPreviewCallbackFlag & CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK)) { 1080 LOG2("Disable preview callback"); 1081 mPreviewCallbackFlag &= ~(CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK | 1082 CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK | 1083 CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK); 1084 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 1085 } 1086 1087 if (c != 0) { 1088 // Is the received frame copied out or not? 1089 if (flags & CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK) { 1090 LOG2("frame is copied"); 1091 copyFrameAndPostCopiedFrame(msgType, c, heap, offset, size, metadata); 1092 } else { 1093 LOG2("frame is forwarded"); 1094 mLock.unlock(); 1095 c->dataCallback(msgType, mem, metadata); 1096 } 1097 } else { 1098 mLock.unlock(); 1099 } 1100} 1101 1102// picture callback - postview image ready 1103void CameraService::Client::handlePostview(const sp<IMemory>& mem) { 1104 disableMsgType(CAMERA_MSG_POSTVIEW_FRAME); 1105 1106 sp<ICameraClient> c = mCameraClient; 1107 mLock.unlock(); 1108 if (c != 0) { 1109 c->dataCallback(CAMERA_MSG_POSTVIEW_FRAME, mem, NULL); 1110 } 1111} 1112 1113// picture callback - raw image ready 1114void CameraService::Client::handleRawPicture(const sp<IMemory>& mem) { 1115 disableMsgType(CAMERA_MSG_RAW_IMAGE); 1116 1117 ssize_t offset; 1118 size_t size; 1119 sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); 1120 1121 sp<ICameraClient> c = mCameraClient; 1122 mLock.unlock(); 1123 if (c != 0) { 1124 c->dataCallback(CAMERA_MSG_RAW_IMAGE, mem, NULL); 1125 } 1126} 1127 1128// picture callback - compressed picture ready 1129void CameraService::Client::handleCompressedPicture(const sp<IMemory>& mem) { 1130 disableMsgType(CAMERA_MSG_COMPRESSED_IMAGE); 1131 1132 sp<ICameraClient> c = mCameraClient; 1133 mLock.unlock(); 1134 if (c != 0) { 1135 c->dataCallback(CAMERA_MSG_COMPRESSED_IMAGE, mem, NULL); 1136 } 1137} 1138 1139 1140void CameraService::Client::handleGenericNotify(int32_t msgType, 1141 int32_t ext1, int32_t ext2) { 1142 sp<ICameraClient> c = mCameraClient; 1143 mLock.unlock(); 1144 if (c != 0) { 1145 c->notifyCallback(msgType, ext1, ext2); 1146 } 1147} 1148 1149void CameraService::Client::handleGenericData(int32_t msgType, 1150 const sp<IMemory>& dataPtr, camera_frame_metadata_t *metadata) { 1151 sp<ICameraClient> c = mCameraClient; 1152 mLock.unlock(); 1153 if (c != 0) { 1154 c->dataCallback(msgType, dataPtr, metadata); 1155 } 1156} 1157 1158void CameraService::Client::handleGenericDataTimestamp(nsecs_t timestamp, 1159 int32_t msgType, const sp<IMemory>& dataPtr) { 1160 sp<ICameraClient> c = mCameraClient; 1161 mLock.unlock(); 1162 if (c != 0) { 1163 c->dataCallbackTimestamp(timestamp, msgType, dataPtr); 1164 } 1165} 1166 1167void CameraService::Client::copyFrameAndPostCopiedFrame( 1168 int32_t msgType, const sp<ICameraClient>& client, 1169 const sp<IMemoryHeap>& heap, size_t offset, size_t size, 1170 camera_frame_metadata_t *metadata) { 1171 LOG2("copyFrameAndPostCopiedFrame"); 1172 // It is necessary to copy out of pmem before sending this to 1173 // the callback. For efficiency, reuse the same MemoryHeapBase 1174 // provided it's big enough. Don't allocate the memory or 1175 // perform the copy if there's no callback. 1176 // hold the preview lock while we grab a reference to the preview buffer 1177 sp<MemoryHeapBase> previewBuffer; 1178 1179 if (mPreviewBuffer == 0) { 1180 mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); 1181 } else if (size > mPreviewBuffer->virtualSize()) { 1182 mPreviewBuffer.clear(); 1183 mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); 1184 } 1185 if (mPreviewBuffer == 0) { 1186 LOGE("failed to allocate space for preview buffer"); 1187 mLock.unlock(); 1188 return; 1189 } 1190 previewBuffer = mPreviewBuffer; 1191 1192 memcpy(previewBuffer->base(), (uint8_t *)heap->base() + offset, size); 1193 1194 sp<MemoryBase> frame = new MemoryBase(previewBuffer, 0, size); 1195 if (frame == 0) { 1196 LOGE("failed to allocate space for frame callback"); 1197 mLock.unlock(); 1198 return; 1199 } 1200 1201 mLock.unlock(); 1202 client->dataCallback(msgType, frame, metadata); 1203} 1204 1205int CameraService::Client::getOrientation(int degrees, bool mirror) { 1206 if (!mirror) { 1207 if (degrees == 0) return 0; 1208 else if (degrees == 90) return HAL_TRANSFORM_ROT_90; 1209 else if (degrees == 180) return HAL_TRANSFORM_ROT_180; 1210 else if (degrees == 270) return HAL_TRANSFORM_ROT_270; 1211 } else { // Do mirror (horizontal flip) 1212 if (degrees == 0) { // FLIP_H and ROT_0 1213 return HAL_TRANSFORM_FLIP_H; 1214 } else if (degrees == 90) { // FLIP_H and ROT_90 1215 return HAL_TRANSFORM_FLIP_H | HAL_TRANSFORM_ROT_90; 1216 } else if (degrees == 180) { // FLIP_H and ROT_180 1217 return HAL_TRANSFORM_FLIP_V; 1218 } else if (degrees == 270) { // FLIP_H and ROT_270 1219 return HAL_TRANSFORM_FLIP_V | HAL_TRANSFORM_ROT_90; 1220 } 1221 } 1222 LOGE("Invalid setDisplayOrientation degrees=%d", degrees); 1223 return -1; 1224} 1225 1226 1227// ---------------------------------------------------------------------------- 1228 1229static const int kDumpLockRetries = 50; 1230static const int kDumpLockSleep = 60000; 1231 1232static bool tryLock(Mutex& mutex) 1233{ 1234 bool locked = false; 1235 for (int i = 0; i < kDumpLockRetries; ++i) { 1236 if (mutex.tryLock() == NO_ERROR) { 1237 locked = true; 1238 break; 1239 } 1240 usleep(kDumpLockSleep); 1241 } 1242 return locked; 1243} 1244 1245status_t CameraService::dump(int fd, const Vector<String16>& args) { 1246 static const char* kDeadlockedString = "CameraService may be deadlocked\n"; 1247 1248 const size_t SIZE = 256; 1249 char buffer[SIZE]; 1250 String8 result; 1251 if (checkCallingPermission(String16("android.permission.DUMP")) == false) { 1252 snprintf(buffer, SIZE, "Permission Denial: " 1253 "can't dump CameraService from pid=%d, uid=%d\n", 1254 getCallingPid(), 1255 getCallingUid()); 1256 result.append(buffer); 1257 write(fd, result.string(), result.size()); 1258 } else { 1259 bool locked = tryLock(mServiceLock); 1260 // failed to lock - CameraService is probably deadlocked 1261 if (!locked) { 1262 String8 result(kDeadlockedString); 1263 write(fd, result.string(), result.size()); 1264 } 1265 1266 bool hasClient = false; 1267 for (int i = 0; i < mNumberOfCameras; i++) { 1268 sp<Client> client = mClient[i].promote(); 1269 if (client == 0) continue; 1270 hasClient = true; 1271 sprintf(buffer, "Client[%d] (%p) PID: %d\n", 1272 i, 1273 client->getCameraClient()->asBinder().get(), 1274 client->mClientPid); 1275 result.append(buffer); 1276 write(fd, result.string(), result.size()); 1277 client->mHardware->dump(fd, args); 1278 } 1279 if (!hasClient) { 1280 result.append("No camera client yet.\n"); 1281 write(fd, result.string(), result.size()); 1282 } 1283 1284 if (locked) mServiceLock.unlock(); 1285 1286 // change logging level 1287 int n = args.size(); 1288 for (int i = 0; i + 1 < n; i++) { 1289 if (args[i] == String16("-v")) { 1290 String8 levelStr(args[i+1]); 1291 int level = atoi(levelStr.string()); 1292 sprintf(buffer, "Set Log Level to %d", level); 1293 result.append(buffer); 1294 setLogLevel(level); 1295 } 1296 } 1297 } 1298 return NO_ERROR; 1299} 1300 1301}; // namespace android 1302