1/* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#define LOG_TAG "CameraClient" 18//#define LOG_NDEBUG 0 19 20#include <cutils/properties.h> 21#include <gui/SurfaceTextureClient.h> 22#include <gui/Surface.h> 23 24#include "CameraClient.h" 25#include "CameraHardwareInterface.h" 26#include "CameraService.h" 27 28namespace android { 29 30#define LOG1(...) ALOGD_IF(gLogLevel >= 1, __VA_ARGS__); 31#define LOG2(...) ALOGD_IF(gLogLevel >= 2, __VA_ARGS__); 32 33static int getCallingPid() { 34 return IPCThreadState::self()->getCallingPid(); 35} 36 37static int getCallingUid() { 38 return IPCThreadState::self()->getCallingUid(); 39} 40 41CameraClient::CameraClient(const sp<CameraService>& cameraService, 42 const sp<ICameraClient>& cameraClient, 43 int cameraId, int cameraFacing, int clientPid, int servicePid): 44 Client(cameraService, cameraClient, 45 cameraId, cameraFacing, clientPid, servicePid) 46{ 47 int callingPid = getCallingPid(); 48 LOG1("CameraClient::CameraClient E (pid %d, id %d)", callingPid, cameraId); 49 50 mHardware = NULL; 51 mMsgEnabled = 0; 52 mSurface = 0; 53 mPreviewWindow = 0; 54 mDestructionStarted = false; 55 56 // Callback is disabled by default 57 mPreviewCallbackFlag = CAMERA_FRAME_CALLBACK_FLAG_NOOP; 58 mOrientation = getOrientation(0, mCameraFacing == CAMERA_FACING_FRONT); 59 mPlayShutterSound = true; 60 LOG1("CameraClient::CameraClient X (pid %d, id %d)", callingPid, cameraId); 61} 62 63status_t CameraClient::initialize(camera_module_t *module) { 64 int callingPid = getCallingPid(); 65 LOG1("CameraClient::initialize E (pid %d, id %d)", callingPid, mCameraId); 66 67 char camera_device_name[10]; 68 status_t res; 69 snprintf(camera_device_name, sizeof(camera_device_name), "%d", mCameraId); 70 71 mHardware = new CameraHardwareInterface(camera_device_name); 72 res = mHardware->initialize(&module->common); 73 if (res != OK) { 74 ALOGE("%s: Camera %d: unable to initialize device: %s (%d)", 75 __FUNCTION__, mCameraId, strerror(-res), res); 76 mHardware.clear(); 77 return NO_INIT; 78 } 79 80 mHardware->setCallbacks(notifyCallback, 81 dataCallback, 82 dataCallbackTimestamp, 83 (void *)mCameraId); 84 85 // Enable zoom, error, focus, and metadata messages by default 86 enableMsgType(CAMERA_MSG_ERROR | CAMERA_MSG_ZOOM | CAMERA_MSG_FOCUS | 87 CAMERA_MSG_PREVIEW_METADATA | CAMERA_MSG_FOCUS_MOVE); 88 89 LOG1("CameraClient::initialize X (pid %d, id %d)", callingPid, mCameraId); 90 return OK; 91} 92 93 94// tear down the client 95CameraClient::~CameraClient() { 96 // this lock should never be NULL 97 Mutex* lock = mCameraService->getClientLockById(mCameraId); 98 lock->lock(); 99 mDestructionStarted = true; 100 // client will not be accessed from callback. should unlock to prevent dead-lock in disconnect 101 lock->unlock(); 102 int callingPid = getCallingPid(); 103 LOG1("CameraClient::~CameraClient E (pid %d, this %p)", callingPid, this); 104 105 disconnect(); 106 LOG1("CameraClient::~CameraClient X (pid %d, this %p)", callingPid, this); 107} 108 109status_t CameraClient::dump(int fd, const Vector<String16>& args) { 110 const size_t SIZE = 256; 111 char buffer[SIZE]; 112 113 size_t len = snprintf(buffer, SIZE, "Client[%d] (%p) PID: %d\n", 114 mCameraId, 115 getCameraClient()->asBinder().get(), 116 mClientPid); 117 len = (len > SIZE - 1) ? SIZE - 1 : len; 118 write(fd, buffer, len); 119 return mHardware->dump(fd, args); 120} 121 122// ---------------------------------------------------------------------------- 123 124status_t CameraClient::checkPid() const { 125 int callingPid = getCallingPid(); 126 if (callingPid == mClientPid) return NO_ERROR; 127 128 ALOGW("attempt to use a locked camera from a different process" 129 " (old pid %d, new pid %d)", mClientPid, callingPid); 130 return EBUSY; 131} 132 133status_t CameraClient::checkPidAndHardware() const { 134 status_t result = checkPid(); 135 if (result != NO_ERROR) return result; 136 if (mHardware == 0) { 137 ALOGE("attempt to use a camera after disconnect() (pid %d)", getCallingPid()); 138 return INVALID_OPERATION; 139 } 140 return NO_ERROR; 141} 142 143status_t CameraClient::lock() { 144 int callingPid = getCallingPid(); 145 LOG1("lock (pid %d)", callingPid); 146 Mutex::Autolock lock(mLock); 147 148 // lock camera to this client if the the camera is unlocked 149 if (mClientPid == 0) { 150 mClientPid = callingPid; 151 return NO_ERROR; 152 } 153 154 // returns NO_ERROR if the client already owns the camera, EBUSY otherwise 155 return checkPid(); 156} 157 158status_t CameraClient::unlock() { 159 int callingPid = getCallingPid(); 160 LOG1("unlock (pid %d)", callingPid); 161 Mutex::Autolock lock(mLock); 162 163 // allow anyone to use camera (after they lock the camera) 164 status_t result = checkPid(); 165 if (result == NO_ERROR) { 166 if (mHardware->recordingEnabled()) { 167 ALOGE("Not allowed to unlock camera during recording."); 168 return INVALID_OPERATION; 169 } 170 mClientPid = 0; 171 LOG1("clear mCameraClient (pid %d)", callingPid); 172 // we need to remove the reference to ICameraClient so that when the app 173 // goes away, the reference count goes to 0. 174 mCameraClient.clear(); 175 } 176 return result; 177} 178 179// connect a new client to the camera 180status_t CameraClient::connect(const sp<ICameraClient>& client) { 181 int callingPid = getCallingPid(); 182 LOG1("connect E (pid %d)", callingPid); 183 Mutex::Autolock lock(mLock); 184 185 if (mClientPid != 0 && checkPid() != NO_ERROR) { 186 ALOGW("Tried to connect to a locked camera (old pid %d, new pid %d)", 187 mClientPid, callingPid); 188 return EBUSY; 189 } 190 191 if (mCameraClient != 0 && (client->asBinder() == mCameraClient->asBinder())) { 192 LOG1("Connect to the same client"); 193 return NO_ERROR; 194 } 195 196 mPreviewCallbackFlag = CAMERA_FRAME_CALLBACK_FLAG_NOOP; 197 mClientPid = callingPid; 198 mCameraClient = client; 199 200 LOG1("connect X (pid %d)", callingPid); 201 return NO_ERROR; 202} 203 204static void disconnectWindow(const sp<ANativeWindow>& window) { 205 if (window != 0) { 206 status_t result = native_window_api_disconnect(window.get(), 207 NATIVE_WINDOW_API_CAMERA); 208 if (result != NO_ERROR) { 209 ALOGW("native_window_api_disconnect failed: %s (%d)", strerror(-result), 210 result); 211 } 212 } 213} 214 215void CameraClient::disconnect() { 216 int callingPid = getCallingPid(); 217 LOG1("disconnect E (pid %d)", callingPid); 218 Mutex::Autolock lock(mLock); 219 220 // Allow both client and the media server to disconnect at all times 221 if (callingPid != mClientPid && callingPid != mServicePid) { 222 ALOGW("different client - don't disconnect"); 223 return; 224 } 225 226 if (mClientPid <= 0) { 227 LOG1("camera is unlocked (mClientPid = %d), don't tear down hardware", mClientPid); 228 return; 229 } 230 231 // Make sure disconnect() is done once and once only, whether it is called 232 // from the user directly, or called by the destructor. 233 if (mHardware == 0) return; 234 235 LOG1("hardware teardown"); 236 // Before destroying mHardware, we must make sure it's in the 237 // idle state. 238 // Turn off all messages. 239 disableMsgType(CAMERA_MSG_ALL_MSGS); 240 mHardware->stopPreview(); 241 mHardware->cancelPicture(); 242 // Release the hardware resources. 243 mHardware->release(); 244 245 // Release the held ANativeWindow resources. 246 if (mPreviewWindow != 0) { 247 disconnectWindow(mPreviewWindow); 248 mPreviewWindow = 0; 249 mHardware->setPreviewWindow(mPreviewWindow); 250 } 251 mHardware.clear(); 252 253 CameraService::Client::disconnect(); 254 255 LOG1("disconnect X (pid %d)", callingPid); 256} 257 258// ---------------------------------------------------------------------------- 259 260status_t CameraClient::setPreviewWindow(const sp<IBinder>& binder, 261 const sp<ANativeWindow>& window) { 262 Mutex::Autolock lock(mLock); 263 status_t result = checkPidAndHardware(); 264 if (result != NO_ERROR) return result; 265 266 // return if no change in surface. 267 if (binder == mSurface) { 268 return NO_ERROR; 269 } 270 271 if (window != 0) { 272 result = native_window_api_connect(window.get(), NATIVE_WINDOW_API_CAMERA); 273 if (result != NO_ERROR) { 274 ALOGE("native_window_api_connect failed: %s (%d)", strerror(-result), 275 result); 276 return result; 277 } 278 } 279 280 // If preview has been already started, register preview buffers now. 281 if (mHardware->previewEnabled()) { 282 if (window != 0) { 283 native_window_set_scaling_mode(window.get(), 284 NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW); 285 native_window_set_buffers_transform(window.get(), mOrientation); 286 result = mHardware->setPreviewWindow(window); 287 } 288 } 289 290 if (result == NO_ERROR) { 291 // Everything has succeeded. Disconnect the old window and remember the 292 // new window. 293 disconnectWindow(mPreviewWindow); 294 mSurface = binder; 295 mPreviewWindow = window; 296 } else { 297 // Something went wrong after we connected to the new window, so 298 // disconnect here. 299 disconnectWindow(window); 300 } 301 302 return result; 303} 304 305// set the Surface that the preview will use 306status_t CameraClient::setPreviewDisplay(const sp<Surface>& surface) { 307 LOG1("setPreviewDisplay(%p) (pid %d)", surface.get(), getCallingPid()); 308 309 sp<IBinder> binder(surface != 0 ? surface->asBinder() : 0); 310 sp<ANativeWindow> window(surface); 311 return setPreviewWindow(binder, window); 312} 313 314// set the SurfaceTexture that the preview will use 315status_t CameraClient::setPreviewTexture( 316 const sp<ISurfaceTexture>& surfaceTexture) { 317 LOG1("setPreviewTexture(%p) (pid %d)", surfaceTexture.get(), 318 getCallingPid()); 319 320 sp<IBinder> binder; 321 sp<ANativeWindow> window; 322 if (surfaceTexture != 0) { 323 binder = surfaceTexture->asBinder(); 324 window = new SurfaceTextureClient(surfaceTexture); 325 } 326 return setPreviewWindow(binder, window); 327} 328 329// set the preview callback flag to affect how the received frames from 330// preview are handled. 331void CameraClient::setPreviewCallbackFlag(int callback_flag) { 332 LOG1("setPreviewCallbackFlag(%d) (pid %d)", callback_flag, getCallingPid()); 333 Mutex::Autolock lock(mLock); 334 if (checkPidAndHardware() != NO_ERROR) return; 335 336 mPreviewCallbackFlag = callback_flag; 337 if (mPreviewCallbackFlag & CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK) { 338 enableMsgType(CAMERA_MSG_PREVIEW_FRAME); 339 } else { 340 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 341 } 342} 343 344// start preview mode 345status_t CameraClient::startPreview() { 346 LOG1("startPreview (pid %d)", getCallingPid()); 347 return startCameraMode(CAMERA_PREVIEW_MODE); 348} 349 350// start recording mode 351status_t CameraClient::startRecording() { 352 LOG1("startRecording (pid %d)", getCallingPid()); 353 return startCameraMode(CAMERA_RECORDING_MODE); 354} 355 356// start preview or recording 357status_t CameraClient::startCameraMode(camera_mode mode) { 358 LOG1("startCameraMode(%d)", mode); 359 Mutex::Autolock lock(mLock); 360 status_t result = checkPidAndHardware(); 361 if (result != NO_ERROR) return result; 362 363 switch(mode) { 364 case CAMERA_PREVIEW_MODE: 365 if (mSurface == 0 && mPreviewWindow == 0) { 366 LOG1("mSurface is not set yet."); 367 // still able to start preview in this case. 368 } 369 return startPreviewMode(); 370 case CAMERA_RECORDING_MODE: 371 if (mSurface == 0 && mPreviewWindow == 0) { 372 ALOGE("mSurface or mPreviewWindow must be set before startRecordingMode."); 373 return INVALID_OPERATION; 374 } 375 return startRecordingMode(); 376 default: 377 return UNKNOWN_ERROR; 378 } 379} 380 381status_t CameraClient::startPreviewMode() { 382 LOG1("startPreviewMode"); 383 status_t result = NO_ERROR; 384 385 // if preview has been enabled, nothing needs to be done 386 if (mHardware->previewEnabled()) { 387 return NO_ERROR; 388 } 389 390 if (mPreviewWindow != 0) { 391 native_window_set_scaling_mode(mPreviewWindow.get(), 392 NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW); 393 native_window_set_buffers_transform(mPreviewWindow.get(), 394 mOrientation); 395 } 396 mHardware->setPreviewWindow(mPreviewWindow); 397 result = mHardware->startPreview(); 398 399 return result; 400} 401 402status_t CameraClient::startRecordingMode() { 403 LOG1("startRecordingMode"); 404 status_t result = NO_ERROR; 405 406 // if recording has been enabled, nothing needs to be done 407 if (mHardware->recordingEnabled()) { 408 return NO_ERROR; 409 } 410 411 // if preview has not been started, start preview first 412 if (!mHardware->previewEnabled()) { 413 result = startPreviewMode(); 414 if (result != NO_ERROR) { 415 return result; 416 } 417 } 418 419 // start recording mode 420 enableMsgType(CAMERA_MSG_VIDEO_FRAME); 421 mCameraService->playSound(CameraService::SOUND_RECORDING); 422 result = mHardware->startRecording(); 423 if (result != NO_ERROR) { 424 ALOGE("mHardware->startRecording() failed with status %d", result); 425 } 426 return result; 427} 428 429// stop preview mode 430void CameraClient::stopPreview() { 431 LOG1("stopPreview (pid %d)", getCallingPid()); 432 Mutex::Autolock lock(mLock); 433 if (checkPidAndHardware() != NO_ERROR) return; 434 435 436 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 437 mHardware->stopPreview(); 438 439 mPreviewBuffer.clear(); 440} 441 442// stop recording mode 443void CameraClient::stopRecording() { 444 LOG1("stopRecording (pid %d)", getCallingPid()); 445 Mutex::Autolock lock(mLock); 446 if (checkPidAndHardware() != NO_ERROR) return; 447 448 disableMsgType(CAMERA_MSG_VIDEO_FRAME); 449 mHardware->stopRecording(); 450 mCameraService->playSound(CameraService::SOUND_RECORDING); 451 452 mPreviewBuffer.clear(); 453} 454 455// release a recording frame 456void CameraClient::releaseRecordingFrame(const sp<IMemory>& mem) { 457 Mutex::Autolock lock(mLock); 458 if (checkPidAndHardware() != NO_ERROR) return; 459 mHardware->releaseRecordingFrame(mem); 460} 461 462status_t CameraClient::storeMetaDataInBuffers(bool enabled) 463{ 464 LOG1("storeMetaDataInBuffers: %s", enabled? "true": "false"); 465 Mutex::Autolock lock(mLock); 466 if (checkPidAndHardware() != NO_ERROR) { 467 return UNKNOWN_ERROR; 468 } 469 return mHardware->storeMetaDataInBuffers(enabled); 470} 471 472bool CameraClient::previewEnabled() { 473 LOG1("previewEnabled (pid %d)", getCallingPid()); 474 475 Mutex::Autolock lock(mLock); 476 if (checkPidAndHardware() != NO_ERROR) return false; 477 return mHardware->previewEnabled(); 478} 479 480bool CameraClient::recordingEnabled() { 481 LOG1("recordingEnabled (pid %d)", getCallingPid()); 482 483 Mutex::Autolock lock(mLock); 484 if (checkPidAndHardware() != NO_ERROR) return false; 485 return mHardware->recordingEnabled(); 486} 487 488status_t CameraClient::autoFocus() { 489 LOG1("autoFocus (pid %d)", getCallingPid()); 490 491 Mutex::Autolock lock(mLock); 492 status_t result = checkPidAndHardware(); 493 if (result != NO_ERROR) return result; 494 495 return mHardware->autoFocus(); 496} 497 498status_t CameraClient::cancelAutoFocus() { 499 LOG1("cancelAutoFocus (pid %d)", getCallingPid()); 500 501 Mutex::Autolock lock(mLock); 502 status_t result = checkPidAndHardware(); 503 if (result != NO_ERROR) return result; 504 505 return mHardware->cancelAutoFocus(); 506} 507 508// take a picture - image is returned in callback 509status_t CameraClient::takePicture(int msgType) { 510 LOG1("takePicture (pid %d): 0x%x", getCallingPid(), msgType); 511 512 Mutex::Autolock lock(mLock); 513 status_t result = checkPidAndHardware(); 514 if (result != NO_ERROR) return result; 515 516 if ((msgType & CAMERA_MSG_RAW_IMAGE) && 517 (msgType & CAMERA_MSG_RAW_IMAGE_NOTIFY)) { 518 ALOGE("CAMERA_MSG_RAW_IMAGE and CAMERA_MSG_RAW_IMAGE_NOTIFY" 519 " cannot be both enabled"); 520 return BAD_VALUE; 521 } 522 523 // We only accept picture related message types 524 // and ignore other types of messages for takePicture(). 525 int picMsgType = msgType 526 & (CAMERA_MSG_SHUTTER | 527 CAMERA_MSG_POSTVIEW_FRAME | 528 CAMERA_MSG_RAW_IMAGE | 529 CAMERA_MSG_RAW_IMAGE_NOTIFY | 530 CAMERA_MSG_COMPRESSED_IMAGE); 531 532 enableMsgType(picMsgType); 533 534 return mHardware->takePicture(); 535} 536 537// set preview/capture parameters - key/value pairs 538status_t CameraClient::setParameters(const String8& params) { 539 LOG1("setParameters (pid %d) (%s)", getCallingPid(), params.string()); 540 541 Mutex::Autolock lock(mLock); 542 status_t result = checkPidAndHardware(); 543 if (result != NO_ERROR) return result; 544 545 CameraParameters p(params); 546 return mHardware->setParameters(p); 547} 548 549// get preview/capture parameters - key/value pairs 550String8 CameraClient::getParameters() const { 551 Mutex::Autolock lock(mLock); 552 if (checkPidAndHardware() != NO_ERROR) return String8(); 553 554 String8 params(mHardware->getParameters().flatten()); 555 LOG1("getParameters (pid %d) (%s)", getCallingPid(), params.string()); 556 return params; 557} 558 559// enable shutter sound 560status_t CameraClient::enableShutterSound(bool enable) { 561 LOG1("enableShutterSound (pid %d)", getCallingPid()); 562 563 status_t result = checkPidAndHardware(); 564 if (result != NO_ERROR) return result; 565 566 if (enable) { 567 mPlayShutterSound = true; 568 return OK; 569 } 570 571 // Disabling shutter sound may not be allowed. In that case only 572 // allow the mediaserver process to disable the sound. 573 char value[PROPERTY_VALUE_MAX]; 574 property_get("ro.camera.sound.forced", value, "0"); 575 if (strcmp(value, "0") != 0) { 576 // Disabling shutter sound is not allowed. Deny if the current 577 // process is not mediaserver. 578 if (getCallingPid() != getpid()) { 579 ALOGE("Failed to disable shutter sound. Permission denied (pid %d)", getCallingPid()); 580 return PERMISSION_DENIED; 581 } 582 } 583 584 mPlayShutterSound = false; 585 return OK; 586} 587 588status_t CameraClient::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) { 589 LOG1("sendCommand (pid %d)", getCallingPid()); 590 int orientation; 591 Mutex::Autolock lock(mLock); 592 status_t result = checkPidAndHardware(); 593 if (result != NO_ERROR) return result; 594 595 if (cmd == CAMERA_CMD_SET_DISPLAY_ORIENTATION) { 596 // Mirror the preview if the camera is front-facing. 597 orientation = getOrientation(arg1, mCameraFacing == CAMERA_FACING_FRONT); 598 if (orientation == -1) return BAD_VALUE; 599 600 if (mOrientation != orientation) { 601 mOrientation = orientation; 602 if (mPreviewWindow != 0) { 603 native_window_set_buffers_transform(mPreviewWindow.get(), 604 mOrientation); 605 } 606 } 607 return OK; 608 } else if (cmd == CAMERA_CMD_ENABLE_SHUTTER_SOUND) { 609 switch (arg1) { 610 case 0: 611 return enableShutterSound(false); 612 case 1: 613 return enableShutterSound(true); 614 default: 615 return BAD_VALUE; 616 } 617 return OK; 618 } else if (cmd == CAMERA_CMD_PLAY_RECORDING_SOUND) { 619 mCameraService->playSound(CameraService::SOUND_RECORDING); 620 } else if (cmd == CAMERA_CMD_SET_VIDEO_BUFFER_COUNT) { 621 // Silently ignore this command 622 return INVALID_OPERATION; 623 } else if (cmd == CAMERA_CMD_PING) { 624 // If mHardware is 0, checkPidAndHardware will return error. 625 return OK; 626 } 627 628 return mHardware->sendCommand(cmd, arg1, arg2); 629} 630 631// ---------------------------------------------------------------------------- 632 633void CameraClient::enableMsgType(int32_t msgType) { 634 android_atomic_or(msgType, &mMsgEnabled); 635 mHardware->enableMsgType(msgType); 636} 637 638void CameraClient::disableMsgType(int32_t msgType) { 639 android_atomic_and(~msgType, &mMsgEnabled); 640 mHardware->disableMsgType(msgType); 641} 642 643#define CHECK_MESSAGE_INTERVAL 10 // 10ms 644bool CameraClient::lockIfMessageWanted(int32_t msgType) { 645 int sleepCount = 0; 646 while (mMsgEnabled & msgType) { 647 if (mLock.tryLock() == NO_ERROR) { 648 if (sleepCount > 0) { 649 LOG1("lockIfMessageWanted(%d): waited for %d ms", 650 msgType, sleepCount * CHECK_MESSAGE_INTERVAL); 651 } 652 return true; 653 } 654 if (sleepCount++ == 0) { 655 LOG1("lockIfMessageWanted(%d): enter sleep", msgType); 656 } 657 usleep(CHECK_MESSAGE_INTERVAL * 1000); 658 } 659 ALOGW("lockIfMessageWanted(%d): dropped unwanted message", msgType); 660 return false; 661} 662 663// Callback messages can be dispatched to internal handlers or pass to our 664// client's callback functions, depending on the message type. 665// 666// notifyCallback: 667// CAMERA_MSG_SHUTTER handleShutter 668// (others) c->notifyCallback 669// dataCallback: 670// CAMERA_MSG_PREVIEW_FRAME handlePreviewData 671// CAMERA_MSG_POSTVIEW_FRAME handlePostview 672// CAMERA_MSG_RAW_IMAGE handleRawPicture 673// CAMERA_MSG_COMPRESSED_IMAGE handleCompressedPicture 674// (others) c->dataCallback 675// dataCallbackTimestamp 676// (others) c->dataCallbackTimestamp 677// 678// NOTE: the *Callback functions grab mLock of the client before passing 679// control to handle* functions. So the handle* functions must release the 680// lock before calling the ICameraClient's callbacks, so those callbacks can 681// invoke methods in the Client class again (For example, the preview frame 682// callback may want to releaseRecordingFrame). The handle* functions must 683// release the lock after all accesses to member variables, so it must be 684// handled very carefully. 685 686void CameraClient::notifyCallback(int32_t msgType, int32_t ext1, 687 int32_t ext2, void* user) { 688 LOG2("notifyCallback(%d)", msgType); 689 690 Mutex* lock = getClientLockFromCookie(user); 691 if (lock == NULL) return; 692 Mutex::Autolock alock(*lock); 693 694 CameraClient* client = 695 static_cast<CameraClient*>(getClientFromCookie(user)); 696 if (client == NULL) return; 697 698 if (!client->lockIfMessageWanted(msgType)) return; 699 700 switch (msgType) { 701 case CAMERA_MSG_SHUTTER: 702 // ext1 is the dimension of the yuv picture. 703 client->handleShutter(); 704 break; 705 default: 706 client->handleGenericNotify(msgType, ext1, ext2); 707 break; 708 } 709} 710 711void CameraClient::dataCallback(int32_t msgType, 712 const sp<IMemory>& dataPtr, camera_frame_metadata_t *metadata, void* user) { 713 LOG2("dataCallback(%d)", msgType); 714 715 Mutex* lock = getClientLockFromCookie(user); 716 if (lock == NULL) return; 717 Mutex::Autolock alock(*lock); 718 719 CameraClient* client = 720 static_cast<CameraClient*>(getClientFromCookie(user)); 721 if (client == NULL) return; 722 723 if (!client->lockIfMessageWanted(msgType)) return; 724 if (dataPtr == 0 && metadata == NULL) { 725 ALOGE("Null data returned in data callback"); 726 client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); 727 return; 728 } 729 730 switch (msgType & ~CAMERA_MSG_PREVIEW_METADATA) { 731 case CAMERA_MSG_PREVIEW_FRAME: 732 client->handlePreviewData(msgType, dataPtr, metadata); 733 break; 734 case CAMERA_MSG_POSTVIEW_FRAME: 735 client->handlePostview(dataPtr); 736 break; 737 case CAMERA_MSG_RAW_IMAGE: 738 client->handleRawPicture(dataPtr); 739 break; 740 case CAMERA_MSG_COMPRESSED_IMAGE: 741 client->handleCompressedPicture(dataPtr); 742 break; 743 default: 744 client->handleGenericData(msgType, dataPtr, metadata); 745 break; 746 } 747} 748 749void CameraClient::dataCallbackTimestamp(nsecs_t timestamp, 750 int32_t msgType, const sp<IMemory>& dataPtr, void* user) { 751 LOG2("dataCallbackTimestamp(%d)", msgType); 752 753 Mutex* lock = getClientLockFromCookie(user); 754 if (lock == NULL) return; 755 Mutex::Autolock alock(*lock); 756 757 CameraClient* client = 758 static_cast<CameraClient*>(getClientFromCookie(user)); 759 if (client == NULL) return; 760 761 if (!client->lockIfMessageWanted(msgType)) return; 762 763 if (dataPtr == 0) { 764 ALOGE("Null data returned in data with timestamp callback"); 765 client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); 766 return; 767 } 768 769 client->handleGenericDataTimestamp(timestamp, msgType, dataPtr); 770} 771 772// snapshot taken callback 773void CameraClient::handleShutter(void) { 774 if (mPlayShutterSound) { 775 mCameraService->playSound(CameraService::SOUND_SHUTTER); 776 } 777 778 sp<ICameraClient> c = mCameraClient; 779 if (c != 0) { 780 mLock.unlock(); 781 c->notifyCallback(CAMERA_MSG_SHUTTER, 0, 0); 782 if (!lockIfMessageWanted(CAMERA_MSG_SHUTTER)) return; 783 } 784 disableMsgType(CAMERA_MSG_SHUTTER); 785 786 mLock.unlock(); 787} 788 789// preview callback - frame buffer update 790void CameraClient::handlePreviewData(int32_t msgType, 791 const sp<IMemory>& mem, 792 camera_frame_metadata_t *metadata) { 793 ssize_t offset; 794 size_t size; 795 sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); 796 797 // local copy of the callback flags 798 int flags = mPreviewCallbackFlag; 799 800 // is callback enabled? 801 if (!(flags & CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK)) { 802 // If the enable bit is off, the copy-out and one-shot bits are ignored 803 LOG2("frame callback is disabled"); 804 mLock.unlock(); 805 return; 806 } 807 808 // hold a strong pointer to the client 809 sp<ICameraClient> c = mCameraClient; 810 811 // clear callback flags if no client or one-shot mode 812 if (c == 0 || (mPreviewCallbackFlag & CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK)) { 813 LOG2("Disable preview callback"); 814 mPreviewCallbackFlag &= ~(CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK | 815 CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK | 816 CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK); 817 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 818 } 819 820 if (c != 0) { 821 // Is the received frame copied out or not? 822 if (flags & CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK) { 823 LOG2("frame is copied"); 824 copyFrameAndPostCopiedFrame(msgType, c, heap, offset, size, metadata); 825 } else { 826 LOG2("frame is forwarded"); 827 mLock.unlock(); 828 c->dataCallback(msgType, mem, metadata); 829 } 830 } else { 831 mLock.unlock(); 832 } 833} 834 835// picture callback - postview image ready 836void CameraClient::handlePostview(const sp<IMemory>& mem) { 837 disableMsgType(CAMERA_MSG_POSTVIEW_FRAME); 838 839 sp<ICameraClient> c = mCameraClient; 840 mLock.unlock(); 841 if (c != 0) { 842 c->dataCallback(CAMERA_MSG_POSTVIEW_FRAME, mem, NULL); 843 } 844} 845 846// picture callback - raw image ready 847void CameraClient::handleRawPicture(const sp<IMemory>& mem) { 848 disableMsgType(CAMERA_MSG_RAW_IMAGE); 849 850 ssize_t offset; 851 size_t size; 852 sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); 853 854 sp<ICameraClient> c = mCameraClient; 855 mLock.unlock(); 856 if (c != 0) { 857 c->dataCallback(CAMERA_MSG_RAW_IMAGE, mem, NULL); 858 } 859} 860 861// picture callback - compressed picture ready 862void CameraClient::handleCompressedPicture(const sp<IMemory>& mem) { 863 disableMsgType(CAMERA_MSG_COMPRESSED_IMAGE); 864 865 sp<ICameraClient> c = mCameraClient; 866 mLock.unlock(); 867 if (c != 0) { 868 c->dataCallback(CAMERA_MSG_COMPRESSED_IMAGE, mem, NULL); 869 } 870} 871 872 873void CameraClient::handleGenericNotify(int32_t msgType, 874 int32_t ext1, int32_t ext2) { 875 sp<ICameraClient> c = mCameraClient; 876 mLock.unlock(); 877 if (c != 0) { 878 c->notifyCallback(msgType, ext1, ext2); 879 } 880} 881 882void CameraClient::handleGenericData(int32_t msgType, 883 const sp<IMemory>& dataPtr, camera_frame_metadata_t *metadata) { 884 sp<ICameraClient> c = mCameraClient; 885 mLock.unlock(); 886 if (c != 0) { 887 c->dataCallback(msgType, dataPtr, metadata); 888 } 889} 890 891void CameraClient::handleGenericDataTimestamp(nsecs_t timestamp, 892 int32_t msgType, const sp<IMemory>& dataPtr) { 893 sp<ICameraClient> c = mCameraClient; 894 mLock.unlock(); 895 if (c != 0) { 896 c->dataCallbackTimestamp(timestamp, msgType, dataPtr); 897 } 898} 899 900void CameraClient::copyFrameAndPostCopiedFrame( 901 int32_t msgType, const sp<ICameraClient>& client, 902 const sp<IMemoryHeap>& heap, size_t offset, size_t size, 903 camera_frame_metadata_t *metadata) { 904 LOG2("copyFrameAndPostCopiedFrame"); 905 // It is necessary to copy out of pmem before sending this to 906 // the callback. For efficiency, reuse the same MemoryHeapBase 907 // provided it's big enough. Don't allocate the memory or 908 // perform the copy if there's no callback. 909 // hold the preview lock while we grab a reference to the preview buffer 910 sp<MemoryHeapBase> previewBuffer; 911 912 if (mPreviewBuffer == 0) { 913 mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); 914 } else if (size > mPreviewBuffer->virtualSize()) { 915 mPreviewBuffer.clear(); 916 mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); 917 } 918 if (mPreviewBuffer == 0) { 919 ALOGE("failed to allocate space for preview buffer"); 920 mLock.unlock(); 921 return; 922 } 923 previewBuffer = mPreviewBuffer; 924 925 memcpy(previewBuffer->base(), (uint8_t *)heap->base() + offset, size); 926 927 sp<MemoryBase> frame = new MemoryBase(previewBuffer, 0, size); 928 if (frame == 0) { 929 ALOGE("failed to allocate space for frame callback"); 930 mLock.unlock(); 931 return; 932 } 933 934 mLock.unlock(); 935 client->dataCallback(msgType, frame, metadata); 936} 937 938int CameraClient::getOrientation(int degrees, bool mirror) { 939 if (!mirror) { 940 if (degrees == 0) return 0; 941 else if (degrees == 90) return HAL_TRANSFORM_ROT_90; 942 else if (degrees == 180) return HAL_TRANSFORM_ROT_180; 943 else if (degrees == 270) return HAL_TRANSFORM_ROT_270; 944 } else { // Do mirror (horizontal flip) 945 if (degrees == 0) { // FLIP_H and ROT_0 946 return HAL_TRANSFORM_FLIP_H; 947 } else if (degrees == 90) { // FLIP_H and ROT_90 948 return HAL_TRANSFORM_FLIP_H | HAL_TRANSFORM_ROT_90; 949 } else if (degrees == 180) { // FLIP_H and ROT_180 950 return HAL_TRANSFORM_FLIP_V; 951 } else if (degrees == 270) { // FLIP_H and ROT_270 952 return HAL_TRANSFORM_FLIP_V | HAL_TRANSFORM_ROT_90; 953 } 954 } 955 ALOGE("Invalid setDisplayOrientation degrees=%d", degrees); 956 return -1; 957} 958 959}; // namespace android 960