CameraService.cpp revision a8e409f8f9b40737d0b03355894b5e141d0aff6b
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 ((msgType & CAMERA_MSG_RAW_IMAGE) && 773 (msgType & CAMERA_MSG_RAW_IMAGE_NOTIFY)) { 774 LOGE("CAMERA_MSG_RAW_IMAGE and CAMERA_MSG_RAW_IMAGE_NOTIFY" 775 " cannot be both enabled"); 776 return BAD_VALUE; 777 } 778 779 // We only accept picture related message types 780 // and ignore other types of messages for takePicture(). 781 int picMsgType = msgType 782 & (CAMERA_MSG_SHUTTER | 783 CAMERA_MSG_POSTVIEW_FRAME | 784 CAMERA_MSG_RAW_IMAGE | 785 CAMERA_MSG_RAW_IMAGE_NOTIFY | 786 CAMERA_MSG_COMPRESSED_IMAGE); 787 788 enableMsgType(picMsgType); 789 790 return mHardware->takePicture(); 791} 792 793// set preview/capture parameters - key/value pairs 794status_t CameraService::Client::setParameters(const String8& params) { 795 LOG1("setParameters (pid %d) (%s)", getCallingPid(), params.string()); 796 797 Mutex::Autolock lock(mLock); 798 status_t result = checkPidAndHardware(); 799 if (result != NO_ERROR) return result; 800 801 CameraParameters p(params); 802 return mHardware->setParameters(p); 803} 804 805// get preview/capture parameters - key/value pairs 806String8 CameraService::Client::getParameters() const { 807 Mutex::Autolock lock(mLock); 808 if (checkPidAndHardware() != NO_ERROR) return String8(); 809 810 String8 params(mHardware->getParameters().flatten()); 811 LOG1("getParameters (pid %d) (%s)", getCallingPid(), params.string()); 812 return params; 813} 814 815// enable shutter sound 816status_t CameraService::Client::enableShutterSound(bool enable) { 817 LOG1("enableShutterSound (pid %d)", getCallingPid()); 818 819 status_t result = checkPidAndHardware(); 820 if (result != NO_ERROR) return result; 821 822 if (enable) { 823 mPlayShutterSound = true; 824 return OK; 825 } 826 827 // Disabling shutter sound may not be allowed. In that case only 828 // allow the mediaserver process to disable the sound. 829 char value[PROPERTY_VALUE_MAX]; 830 property_get("ro.camera.sound.forced", value, "0"); 831 if (strcmp(value, "0") != 0) { 832 // Disabling shutter sound is not allowed. Deny if the current 833 // process is not mediaserver. 834 if (getCallingPid() != getpid()) { 835 LOGE("Failed to disable shutter sound. Permission denied (pid %d)", getCallingPid()); 836 return PERMISSION_DENIED; 837 } 838 } 839 840 mPlayShutterSound = false; 841 return OK; 842} 843 844status_t CameraService::Client::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) { 845 LOG1("sendCommand (pid %d)", getCallingPid()); 846 int orientation; 847 Mutex::Autolock lock(mLock); 848 status_t result = checkPidAndHardware(); 849 if (result != NO_ERROR) return result; 850 851 if (cmd == CAMERA_CMD_SET_DISPLAY_ORIENTATION) { 852 // The orientation cannot be set during preview. 853 if (mHardware->previewEnabled()) { 854 return INVALID_OPERATION; 855 } 856 // Mirror the preview if the camera is front-facing. 857 orientation = getOrientation(arg1, mCameraFacing == CAMERA_FACING_FRONT); 858 if (orientation == -1) return BAD_VALUE; 859 860 if (mOrientation != orientation) { 861 mOrientation = orientation; 862 } 863 return OK; 864 } else if (cmd == CAMERA_CMD_ENABLE_SHUTTER_SOUND) { 865 switch (arg1) { 866 case 0: 867 enableShutterSound(false); 868 break; 869 case 1: 870 enableShutterSound(true); 871 break; 872 default: 873 return BAD_VALUE; 874 } 875 return OK; 876 } else if (cmd == CAMERA_CMD_PLAY_RECORDING_SOUND) { 877 mCameraService->playSound(SOUND_RECORDING); 878 } 879 880 return mHardware->sendCommand(cmd, arg1, arg2); 881} 882 883// ---------------------------------------------------------------------------- 884 885void CameraService::Client::enableMsgType(int32_t msgType) { 886 android_atomic_or(msgType, &mMsgEnabled); 887 mHardware->enableMsgType(msgType); 888} 889 890void CameraService::Client::disableMsgType(int32_t msgType) { 891 android_atomic_and(~msgType, &mMsgEnabled); 892 mHardware->disableMsgType(msgType); 893} 894 895#define CHECK_MESSAGE_INTERVAL 10 // 10ms 896bool CameraService::Client::lockIfMessageWanted(int32_t msgType) { 897 int sleepCount = 0; 898 while (mMsgEnabled & msgType) { 899 if (mLock.tryLock() == NO_ERROR) { 900 if (sleepCount > 0) { 901 LOG1("lockIfMessageWanted(%d): waited for %d ms", 902 msgType, sleepCount * CHECK_MESSAGE_INTERVAL); 903 } 904 return true; 905 } 906 if (sleepCount++ == 0) { 907 LOG1("lockIfMessageWanted(%d): enter sleep", msgType); 908 } 909 usleep(CHECK_MESSAGE_INTERVAL * 1000); 910 } 911 LOGW("lockIfMessageWanted(%d): dropped unwanted message", msgType); 912 return false; 913} 914 915// ---------------------------------------------------------------------------- 916 917// Converts from a raw pointer to the client to a strong pointer during a 918// hardware callback. This requires the callbacks only happen when the client 919// is still alive. 920sp<CameraService::Client> CameraService::Client::getClientFromCookie(void* user) { 921 sp<Client> client = gCameraService->getClientById((int) user); 922 923 // This could happen if the Client is in the process of shutting down (the 924 // last strong reference is gone, but the destructor hasn't finished 925 // stopping the hardware). 926 if (client == 0) return NULL; 927 928 // The checks below are not necessary and are for debugging only. 929 if (client->mCameraService.get() != gCameraService) { 930 LOGE("mismatch service!"); 931 return NULL; 932 } 933 934 if (client->mHardware == 0) { 935 LOGE("mHardware == 0: callback after disconnect()?"); 936 return NULL; 937 } 938 939 return client; 940} 941 942// Callback messages can be dispatched to internal handlers or pass to our 943// client's callback functions, depending on the message type. 944// 945// notifyCallback: 946// CAMERA_MSG_SHUTTER handleShutter 947// (others) c->notifyCallback 948// dataCallback: 949// CAMERA_MSG_PREVIEW_FRAME handlePreviewData 950// CAMERA_MSG_POSTVIEW_FRAME handlePostview 951// CAMERA_MSG_RAW_IMAGE handleRawPicture 952// CAMERA_MSG_COMPRESSED_IMAGE handleCompressedPicture 953// (others) c->dataCallback 954// dataCallbackTimestamp 955// (others) c->dataCallbackTimestamp 956// 957// NOTE: the *Callback functions grab mLock of the client before passing 958// control to handle* functions. So the handle* functions must release the 959// lock before calling the ICameraClient's callbacks, so those callbacks can 960// invoke methods in the Client class again (For example, the preview frame 961// callback may want to releaseRecordingFrame). The handle* functions must 962// release the lock after all accesses to member variables, so it must be 963// handled very carefully. 964 965void CameraService::Client::notifyCallback(int32_t msgType, int32_t ext1, 966 int32_t ext2, void* user) { 967 LOG2("notifyCallback(%d)", msgType); 968 969 sp<Client> client = getClientFromCookie(user); 970 if (client == 0) return; 971 if (!client->lockIfMessageWanted(msgType)) return; 972 973 switch (msgType) { 974 case CAMERA_MSG_SHUTTER: 975 // ext1 is the dimension of the yuv picture. 976 client->handleShutter(); 977 break; 978 default: 979 client->handleGenericNotify(msgType, ext1, ext2); 980 break; 981 } 982} 983 984void CameraService::Client::dataCallback(int32_t msgType, 985 const sp<IMemory>& dataPtr, camera_frame_metadata_t *metadata, void* user) { 986 LOG2("dataCallback(%d)", msgType); 987 988 sp<Client> client = getClientFromCookie(user); 989 if (client == 0) return; 990 if (!client->lockIfMessageWanted(msgType)) return; 991 992 if (dataPtr == 0 && metadata == NULL) { 993 LOGE("Null data returned in data callback"); 994 client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); 995 return; 996 } 997 998 switch (msgType & ~CAMERA_MSG_PREVIEW_METADATA) { 999 case CAMERA_MSG_PREVIEW_FRAME: 1000 client->handlePreviewData(msgType, dataPtr, metadata); 1001 break; 1002 case CAMERA_MSG_POSTVIEW_FRAME: 1003 client->handlePostview(dataPtr); 1004 break; 1005 case CAMERA_MSG_RAW_IMAGE: 1006 client->handleRawPicture(dataPtr); 1007 break; 1008 case CAMERA_MSG_COMPRESSED_IMAGE: 1009 client->handleCompressedPicture(dataPtr); 1010 break; 1011 default: 1012 client->handleGenericData(msgType, dataPtr, metadata); 1013 break; 1014 } 1015} 1016 1017void CameraService::Client::dataCallbackTimestamp(nsecs_t timestamp, 1018 int32_t msgType, const sp<IMemory>& dataPtr, void* user) { 1019 LOG2("dataCallbackTimestamp(%d)", msgType); 1020 1021 sp<Client> client = getClientFromCookie(user); 1022 if (client == 0) return; 1023 if (!client->lockIfMessageWanted(msgType)) return; 1024 1025 if (dataPtr == 0) { 1026 LOGE("Null data returned in data with timestamp callback"); 1027 client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); 1028 return; 1029 } 1030 1031 client->handleGenericDataTimestamp(timestamp, msgType, dataPtr); 1032} 1033 1034// snapshot taken callback 1035void CameraService::Client::handleShutter(void) { 1036 if (mPlayShutterSound) { 1037 mCameraService->playSound(SOUND_SHUTTER); 1038 } 1039 1040 sp<ICameraClient> c = mCameraClient; 1041 if (c != 0) { 1042 mLock.unlock(); 1043 c->notifyCallback(CAMERA_MSG_SHUTTER, 0, 0); 1044 if (!lockIfMessageWanted(CAMERA_MSG_SHUTTER)) return; 1045 } 1046 disableMsgType(CAMERA_MSG_SHUTTER); 1047 1048 mLock.unlock(); 1049} 1050 1051// preview callback - frame buffer update 1052void CameraService::Client::handlePreviewData(int32_t msgType, 1053 const sp<IMemory>& mem, 1054 camera_frame_metadata_t *metadata) { 1055 ssize_t offset; 1056 size_t size; 1057 sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); 1058 1059 // local copy of the callback flags 1060 int flags = mPreviewCallbackFlag; 1061 1062 // is callback enabled? 1063 if (!(flags & CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK)) { 1064 // If the enable bit is off, the copy-out and one-shot bits are ignored 1065 LOG2("frame callback is disabled"); 1066 mLock.unlock(); 1067 return; 1068 } 1069 1070 // hold a strong pointer to the client 1071 sp<ICameraClient> c = mCameraClient; 1072 1073 // clear callback flags if no client or one-shot mode 1074 if (c == 0 || (mPreviewCallbackFlag & CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK)) { 1075 LOG2("Disable preview callback"); 1076 mPreviewCallbackFlag &= ~(CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK | 1077 CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK | 1078 CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK); 1079 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 1080 } 1081 1082 if (c != 0) { 1083 // Is the received frame copied out or not? 1084 if (flags & CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK) { 1085 LOG2("frame is copied"); 1086 copyFrameAndPostCopiedFrame(msgType, c, heap, offset, size, metadata); 1087 } else { 1088 LOG2("frame is forwarded"); 1089 mLock.unlock(); 1090 c->dataCallback(msgType, mem, metadata); 1091 } 1092 } else { 1093 mLock.unlock(); 1094 } 1095} 1096 1097// picture callback - postview image ready 1098void CameraService::Client::handlePostview(const sp<IMemory>& mem) { 1099 disableMsgType(CAMERA_MSG_POSTVIEW_FRAME); 1100 1101 sp<ICameraClient> c = mCameraClient; 1102 mLock.unlock(); 1103 if (c != 0) { 1104 c->dataCallback(CAMERA_MSG_POSTVIEW_FRAME, mem, NULL); 1105 } 1106} 1107 1108// picture callback - raw image ready 1109void CameraService::Client::handleRawPicture(const sp<IMemory>& mem) { 1110 disableMsgType(CAMERA_MSG_RAW_IMAGE); 1111 1112 ssize_t offset; 1113 size_t size; 1114 sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); 1115 1116 sp<ICameraClient> c = mCameraClient; 1117 mLock.unlock(); 1118 if (c != 0) { 1119 c->dataCallback(CAMERA_MSG_RAW_IMAGE, mem, NULL); 1120 } 1121} 1122 1123// picture callback - compressed picture ready 1124void CameraService::Client::handleCompressedPicture(const sp<IMemory>& mem) { 1125 disableMsgType(CAMERA_MSG_COMPRESSED_IMAGE); 1126 1127 sp<ICameraClient> c = mCameraClient; 1128 mLock.unlock(); 1129 if (c != 0) { 1130 c->dataCallback(CAMERA_MSG_COMPRESSED_IMAGE, mem, NULL); 1131 } 1132} 1133 1134 1135void CameraService::Client::handleGenericNotify(int32_t msgType, 1136 int32_t ext1, int32_t ext2) { 1137 sp<ICameraClient> c = mCameraClient; 1138 mLock.unlock(); 1139 if (c != 0) { 1140 c->notifyCallback(msgType, ext1, ext2); 1141 } 1142} 1143 1144void CameraService::Client::handleGenericData(int32_t msgType, 1145 const sp<IMemory>& dataPtr, camera_frame_metadata_t *metadata) { 1146 sp<ICameraClient> c = mCameraClient; 1147 mLock.unlock(); 1148 if (c != 0) { 1149 c->dataCallback(msgType, dataPtr, metadata); 1150 } 1151} 1152 1153void CameraService::Client::handleGenericDataTimestamp(nsecs_t timestamp, 1154 int32_t msgType, const sp<IMemory>& dataPtr) { 1155 sp<ICameraClient> c = mCameraClient; 1156 mLock.unlock(); 1157 if (c != 0) { 1158 c->dataCallbackTimestamp(timestamp, msgType, dataPtr); 1159 } 1160} 1161 1162void CameraService::Client::copyFrameAndPostCopiedFrame( 1163 int32_t msgType, const sp<ICameraClient>& client, 1164 const sp<IMemoryHeap>& heap, size_t offset, size_t size, 1165 camera_frame_metadata_t *metadata) { 1166 LOG2("copyFrameAndPostCopiedFrame"); 1167 // It is necessary to copy out of pmem before sending this to 1168 // the callback. For efficiency, reuse the same MemoryHeapBase 1169 // provided it's big enough. Don't allocate the memory or 1170 // perform the copy if there's no callback. 1171 // hold the preview lock while we grab a reference to the preview buffer 1172 sp<MemoryHeapBase> previewBuffer; 1173 1174 if (mPreviewBuffer == 0) { 1175 mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); 1176 } else if (size > mPreviewBuffer->virtualSize()) { 1177 mPreviewBuffer.clear(); 1178 mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); 1179 } 1180 if (mPreviewBuffer == 0) { 1181 LOGE("failed to allocate space for preview buffer"); 1182 mLock.unlock(); 1183 return; 1184 } 1185 previewBuffer = mPreviewBuffer; 1186 1187 memcpy(previewBuffer->base(), (uint8_t *)heap->base() + offset, size); 1188 1189 sp<MemoryBase> frame = new MemoryBase(previewBuffer, 0, size); 1190 if (frame == 0) { 1191 LOGE("failed to allocate space for frame callback"); 1192 mLock.unlock(); 1193 return; 1194 } 1195 1196 mLock.unlock(); 1197 client->dataCallback(msgType, frame, metadata); 1198} 1199 1200int CameraService::Client::getOrientation(int degrees, bool mirror) { 1201 if (!mirror) { 1202 if (degrees == 0) return 0; 1203 else if (degrees == 90) return HAL_TRANSFORM_ROT_90; 1204 else if (degrees == 180) return HAL_TRANSFORM_ROT_180; 1205 else if (degrees == 270) return HAL_TRANSFORM_ROT_270; 1206 } else { // Do mirror (horizontal flip) 1207 if (degrees == 0) { // FLIP_H and ROT_0 1208 return HAL_TRANSFORM_FLIP_H; 1209 } else if (degrees == 90) { // FLIP_H and ROT_90 1210 return HAL_TRANSFORM_FLIP_H | HAL_TRANSFORM_ROT_90; 1211 } else if (degrees == 180) { // FLIP_H and ROT_180 1212 return HAL_TRANSFORM_FLIP_V; 1213 } else if (degrees == 270) { // FLIP_H and ROT_270 1214 return HAL_TRANSFORM_FLIP_V | HAL_TRANSFORM_ROT_90; 1215 } 1216 } 1217 LOGE("Invalid setDisplayOrientation degrees=%d", degrees); 1218 return -1; 1219} 1220 1221 1222// ---------------------------------------------------------------------------- 1223 1224static const int kDumpLockRetries = 50; 1225static const int kDumpLockSleep = 60000; 1226 1227static bool tryLock(Mutex& mutex) 1228{ 1229 bool locked = false; 1230 for (int i = 0; i < kDumpLockRetries; ++i) { 1231 if (mutex.tryLock() == NO_ERROR) { 1232 locked = true; 1233 break; 1234 } 1235 usleep(kDumpLockSleep); 1236 } 1237 return locked; 1238} 1239 1240status_t CameraService::dump(int fd, const Vector<String16>& args) { 1241 static const char* kDeadlockedString = "CameraService may be deadlocked\n"; 1242 1243 const size_t SIZE = 256; 1244 char buffer[SIZE]; 1245 String8 result; 1246 if (checkCallingPermission(String16("android.permission.DUMP")) == false) { 1247 snprintf(buffer, SIZE, "Permission Denial: " 1248 "can't dump CameraService from pid=%d, uid=%d\n", 1249 getCallingPid(), 1250 getCallingUid()); 1251 result.append(buffer); 1252 write(fd, result.string(), result.size()); 1253 } else { 1254 bool locked = tryLock(mServiceLock); 1255 // failed to lock - CameraService is probably deadlocked 1256 if (!locked) { 1257 String8 result(kDeadlockedString); 1258 write(fd, result.string(), result.size()); 1259 } 1260 1261 bool hasClient = false; 1262 for (int i = 0; i < mNumberOfCameras; i++) { 1263 sp<Client> client = mClient[i].promote(); 1264 if (client == 0) continue; 1265 hasClient = true; 1266 sprintf(buffer, "Client[%d] (%p) PID: %d\n", 1267 i, 1268 client->getCameraClient()->asBinder().get(), 1269 client->mClientPid); 1270 result.append(buffer); 1271 write(fd, result.string(), result.size()); 1272 client->mHardware->dump(fd, args); 1273 } 1274 if (!hasClient) { 1275 result.append("No camera client yet.\n"); 1276 write(fd, result.string(), result.size()); 1277 } 1278 1279 if (locked) mServiceLock.unlock(); 1280 1281 // change logging level 1282 int n = args.size(); 1283 for (int i = 0; i + 1 < n; i++) { 1284 if (args[i] == String16("-v")) { 1285 String8 levelStr(args[i+1]); 1286 int level = atoi(levelStr.string()); 1287 sprintf(buffer, "Set Log Level to %d", level); 1288 result.append(buffer); 1289 setLogLevel(level); 1290 } 1291 } 1292 } 1293 return NO_ERROR; 1294} 1295 1296}; // namespace android 1297