CameraClient.cpp revision a858ea0495c887621a2fd9c0afc13780deccb597
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/Surface.h> 22 23#include "api1/CameraClient.h" 24#include "device1/CameraHardwareInterface.h" 25#include "CameraService.h" 26 27namespace android { 28 29#define LOG1(...) ALOGD_IF(gLogLevel >= 1, __VA_ARGS__); 30#define LOG2(...) ALOGD_IF(gLogLevel >= 2, __VA_ARGS__); 31 32static int getCallingPid() { 33 return IPCThreadState::self()->getCallingPid(); 34} 35 36CameraClient::CameraClient(const sp<CameraService>& cameraService, 37 const sp<ICameraClient>& cameraClient, 38 const String16& clientPackageName, 39 int cameraId, int cameraFacing, 40 int clientPid, int clientUid, 41 int servicePid, bool legacyMode): 42 Client(cameraService, cameraClient, clientPackageName, 43 cameraId, cameraFacing, clientPid, clientUid, servicePid) 44{ 45 int callingPid = getCallingPid(); 46 LOG1("CameraClient::CameraClient E (pid %d, id %d)", callingPid, cameraId); 47 48 mHardware = NULL; 49 mMsgEnabled = 0; 50 mSurface = 0; 51 mPreviewWindow = 0; 52 mDestructionStarted = false; 53 54 // Callback is disabled by default 55 mPreviewCallbackFlag = CAMERA_FRAME_CALLBACK_FLAG_NOOP; 56 mOrientation = getOrientation(0, mCameraFacing == CAMERA_FACING_FRONT); 57 mLegacyMode = legacyMode; 58 mPlayShutterSound = true; 59 LOG1("CameraClient::CameraClient X (pid %d, id %d)", callingPid, cameraId); 60} 61 62status_t CameraClient::initialize(camera_module_t *module) { 63 int callingPid = getCallingPid(); 64 status_t res; 65 66 LOG1("CameraClient::initialize E (pid %d, id %d)", callingPid, mCameraId); 67 68 // Verify ops permissions 69 res = startCameraOps(); 70 if (res != OK) { 71 return res; 72 } 73 74 char camera_device_name[10]; 75 snprintf(camera_device_name, sizeof(camera_device_name), "%d", mCameraId); 76 77 mHardware = new CameraHardwareInterface(camera_device_name); 78 res = mHardware->initialize(&module->common); 79 if (res != OK) { 80 ALOGE("%s: Camera %d: unable to initialize device: %s (%d)", 81 __FUNCTION__, mCameraId, strerror(-res), res); 82 mHardware.clear(); 83 return res; 84 } 85 86 mHardware->setCallbacks(notifyCallback, 87 dataCallback, 88 dataCallbackTimestamp, 89 (void *)(uintptr_t)mCameraId); 90 91 // Enable zoom, error, focus, and metadata messages by default 92 enableMsgType(CAMERA_MSG_ERROR | CAMERA_MSG_ZOOM | CAMERA_MSG_FOCUS | 93 CAMERA_MSG_PREVIEW_METADATA | CAMERA_MSG_FOCUS_MOVE); 94 95 LOG1("CameraClient::initialize X (pid %d, id %d)", callingPid, mCameraId); 96 return OK; 97} 98 99 100// tear down the client 101CameraClient::~CameraClient() { 102 // this lock should never be NULL 103 Mutex* lock = mCameraService->getClientLockById(mCameraId); 104 lock->lock(); 105 mDestructionStarted = true; 106 // client will not be accessed from callback. should unlock to prevent dead-lock in disconnect 107 lock->unlock(); 108 int callingPid = getCallingPid(); 109 LOG1("CameraClient::~CameraClient E (pid %d, this %p)", callingPid, this); 110 111 disconnect(); 112 LOG1("CameraClient::~CameraClient X (pid %d, this %p)", callingPid, this); 113} 114 115status_t CameraClient::dump(int fd, const Vector<String16>& args) { 116 const size_t SIZE = 256; 117 char buffer[SIZE]; 118 119 size_t len = snprintf(buffer, SIZE, "Client[%d] (%p) PID: %d\n", 120 mCameraId, 121 getRemoteCallback()->asBinder().get(), 122 mClientPid); 123 len = (len > SIZE - 1) ? SIZE - 1 : len; 124 write(fd, buffer, len); 125 return mHardware->dump(fd, args); 126} 127 128// ---------------------------------------------------------------------------- 129 130status_t CameraClient::checkPid() const { 131 int callingPid = getCallingPid(); 132 if (callingPid == mClientPid) return NO_ERROR; 133 134 ALOGW("attempt to use a locked camera from a different process" 135 " (old pid %d, new pid %d)", mClientPid, callingPid); 136 return EBUSY; 137} 138 139status_t CameraClient::checkPidAndHardware() const { 140 status_t result = checkPid(); 141 if (result != NO_ERROR) return result; 142 if (mHardware == 0) { 143 ALOGE("attempt to use a camera after disconnect() (pid %d)", getCallingPid()); 144 return INVALID_OPERATION; 145 } 146 return NO_ERROR; 147} 148 149status_t CameraClient::lock() { 150 int callingPid = getCallingPid(); 151 LOG1("lock (pid %d)", callingPid); 152 Mutex::Autolock lock(mLock); 153 154 // lock camera to this client if the the camera is unlocked 155 if (mClientPid == 0) { 156 mClientPid = callingPid; 157 return NO_ERROR; 158 } 159 160 // returns NO_ERROR if the client already owns the camera, EBUSY otherwise 161 return checkPid(); 162} 163 164status_t CameraClient::unlock() { 165 int callingPid = getCallingPid(); 166 LOG1("unlock (pid %d)", callingPid); 167 Mutex::Autolock lock(mLock); 168 169 // allow anyone to use camera (after they lock the camera) 170 status_t result = checkPid(); 171 if (result == NO_ERROR) { 172 if (mHardware->recordingEnabled()) { 173 ALOGE("Not allowed to unlock camera during recording."); 174 return INVALID_OPERATION; 175 } 176 mClientPid = 0; 177 LOG1("clear mRemoteCallback (pid %d)", callingPid); 178 // we need to remove the reference to ICameraClient so that when the app 179 // goes away, the reference count goes to 0. 180 mRemoteCallback.clear(); 181 } 182 return result; 183} 184 185// connect a new client to the camera 186status_t CameraClient::connect(const sp<ICameraClient>& client) { 187 int callingPid = getCallingPid(); 188 LOG1("connect E (pid %d)", callingPid); 189 Mutex::Autolock lock(mLock); 190 191 if (mClientPid != 0 && checkPid() != NO_ERROR) { 192 ALOGW("Tried to connect to a locked camera (old pid %d, new pid %d)", 193 mClientPid, callingPid); 194 return EBUSY; 195 } 196 197 if (mRemoteCallback != 0 && 198 (client->asBinder() == mRemoteCallback->asBinder())) { 199 LOG1("Connect to the same client"); 200 return NO_ERROR; 201 } 202 203 mPreviewCallbackFlag = CAMERA_FRAME_CALLBACK_FLAG_NOOP; 204 mClientPid = callingPid; 205 mRemoteCallback = client; 206 207 LOG1("connect X (pid %d)", callingPid); 208 return NO_ERROR; 209} 210 211static void disconnectWindow(const sp<ANativeWindow>& window) { 212 if (window != 0) { 213 status_t result = native_window_api_disconnect(window.get(), 214 NATIVE_WINDOW_API_CAMERA); 215 if (result != NO_ERROR) { 216 ALOGW("native_window_api_disconnect failed: %s (%d)", strerror(-result), 217 result); 218 } 219 } 220} 221 222void CameraClient::disconnect() { 223 int callingPid = getCallingPid(); 224 LOG1("disconnect E (pid %d)", callingPid); 225 Mutex::Autolock lock(mLock); 226 227 // Allow both client and the media server to disconnect at all times 228 if (callingPid != mClientPid && callingPid != mServicePid) { 229 ALOGW("different client - don't disconnect"); 230 return; 231 } 232 233 if (mClientPid <= 0) { 234 LOG1("camera is unlocked (mClientPid = %d), don't tear down hardware", mClientPid); 235 return; 236 } 237 238 // Make sure disconnect() is done once and once only, whether it is called 239 // from the user directly, or called by the destructor. 240 if (mHardware == 0) return; 241 242 LOG1("hardware teardown"); 243 // Before destroying mHardware, we must make sure it's in the 244 // idle state. 245 // Turn off all messages. 246 disableMsgType(CAMERA_MSG_ALL_MSGS); 247 mHardware->stopPreview(); 248 mHardware->cancelPicture(); 249 // Release the hardware resources. 250 mHardware->release(); 251 252 // Release the held ANativeWindow resources. 253 if (mPreviewWindow != 0) { 254 disconnectWindow(mPreviewWindow); 255 mPreviewWindow = 0; 256 mHardware->setPreviewWindow(mPreviewWindow); 257 } 258 mHardware.clear(); 259 260 CameraService::Client::disconnect(); 261 262 LOG1("disconnect X (pid %d)", callingPid); 263} 264 265// ---------------------------------------------------------------------------- 266 267status_t CameraClient::setPreviewWindow(const sp<IBinder>& binder, 268 const sp<ANativeWindow>& window) { 269 Mutex::Autolock lock(mLock); 270 status_t result = checkPidAndHardware(); 271 if (result != NO_ERROR) return result; 272 273 // return if no change in surface. 274 if (binder == mSurface) { 275 return NO_ERROR; 276 } 277 278 if (window != 0) { 279 result = native_window_api_connect(window.get(), NATIVE_WINDOW_API_CAMERA); 280 if (result != NO_ERROR) { 281 ALOGE("native_window_api_connect failed: %s (%d)", strerror(-result), 282 result); 283 return result; 284 } 285 } 286 287 // If preview has been already started, register preview buffers now. 288 if (mHardware->previewEnabled()) { 289 if (window != 0) { 290 native_window_set_scaling_mode(window.get(), 291 NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW); 292 native_window_set_buffers_transform(window.get(), mOrientation); 293 result = mHardware->setPreviewWindow(window); 294 } 295 } 296 297 if (result == NO_ERROR) { 298 // Everything has succeeded. Disconnect the old window and remember the 299 // new window. 300 disconnectWindow(mPreviewWindow); 301 mSurface = binder; 302 mPreviewWindow = window; 303 } else { 304 // Something went wrong after we connected to the new window, so 305 // disconnect here. 306 disconnectWindow(window); 307 } 308 309 return result; 310} 311 312// set the buffer consumer that the preview will use 313status_t CameraClient::setPreviewTarget( 314 const sp<IGraphicBufferProducer>& bufferProducer) { 315 LOG1("setPreviewTarget(%p) (pid %d)", bufferProducer.get(), 316 getCallingPid()); 317 318 sp<IBinder> binder; 319 sp<ANativeWindow> window; 320 if (bufferProducer != 0) { 321 binder = bufferProducer->asBinder(); 322 // Using controlledByApp flag to ensure that the buffer queue remains in 323 // async mode for the old camera API, where many applications depend 324 // on that behavior. 325 window = new Surface(bufferProducer, /*controlledByApp*/ true); 326 } 327 return setPreviewWindow(binder, window); 328} 329 330// set the preview callback flag to affect how the received frames from 331// preview are handled. 332void CameraClient::setPreviewCallbackFlag(int callback_flag) { 333 LOG1("setPreviewCallbackFlag(%d) (pid %d)", callback_flag, getCallingPid()); 334 Mutex::Autolock lock(mLock); 335 if (checkPidAndHardware() != NO_ERROR) return; 336 337 mPreviewCallbackFlag = callback_flag; 338 if (mPreviewCallbackFlag & CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK) { 339 enableMsgType(CAMERA_MSG_PREVIEW_FRAME); 340 } else { 341 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 342 } 343} 344 345status_t CameraClient::setPreviewCallbackTarget( 346 const sp<IGraphicBufferProducer>& callbackProducer) { 347 (void)callbackProducer; 348 ALOGE("%s: Unimplemented!", __FUNCTION__); 349 return INVALID_OPERATION; 350} 351 352// start preview mode 353status_t CameraClient::startPreview() { 354 LOG1("startPreview (pid %d)", getCallingPid()); 355 return startCameraMode(CAMERA_PREVIEW_MODE); 356} 357 358// start recording mode 359status_t CameraClient::startRecording() { 360 LOG1("startRecording (pid %d)", getCallingPid()); 361 return startCameraMode(CAMERA_RECORDING_MODE); 362} 363 364// start preview or recording 365status_t CameraClient::startCameraMode(camera_mode mode) { 366 LOG1("startCameraMode(%d)", mode); 367 Mutex::Autolock lock(mLock); 368 status_t result = checkPidAndHardware(); 369 if (result != NO_ERROR) return result; 370 371 switch(mode) { 372 case CAMERA_PREVIEW_MODE: 373 if (mSurface == 0 && mPreviewWindow == 0) { 374 LOG1("mSurface is not set yet."); 375 // still able to start preview in this case. 376 } 377 return startPreviewMode(); 378 case CAMERA_RECORDING_MODE: 379 if (mSurface == 0 && mPreviewWindow == 0) { 380 ALOGE("mSurface or mPreviewWindow must be set before startRecordingMode."); 381 return INVALID_OPERATION; 382 } 383 return startRecordingMode(); 384 default: 385 return UNKNOWN_ERROR; 386 } 387} 388 389status_t CameraClient::startPreviewMode() { 390 LOG1("startPreviewMode"); 391 status_t result = NO_ERROR; 392 393 // if preview has been enabled, nothing needs to be done 394 if (mHardware->previewEnabled()) { 395 return NO_ERROR; 396 } 397 398 if (mPreviewWindow != 0) { 399 native_window_set_scaling_mode(mPreviewWindow.get(), 400 NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW); 401 native_window_set_buffers_transform(mPreviewWindow.get(), 402 mOrientation); 403 } 404 mHardware->setPreviewWindow(mPreviewWindow); 405 result = mHardware->startPreview(); 406 407 return result; 408} 409 410status_t CameraClient::startRecordingMode() { 411 LOG1("startRecordingMode"); 412 status_t result = NO_ERROR; 413 414 // if recording has been enabled, nothing needs to be done 415 if (mHardware->recordingEnabled()) { 416 return NO_ERROR; 417 } 418 419 // if preview has not been started, start preview first 420 if (!mHardware->previewEnabled()) { 421 result = startPreviewMode(); 422 if (result != NO_ERROR) { 423 return result; 424 } 425 } 426 427 // start recording mode 428 enableMsgType(CAMERA_MSG_VIDEO_FRAME); 429 mCameraService->playSound(CameraService::SOUND_RECORDING); 430 result = mHardware->startRecording(); 431 if (result != NO_ERROR) { 432 ALOGE("mHardware->startRecording() failed with status %d", result); 433 } 434 return result; 435} 436 437// stop preview mode 438void CameraClient::stopPreview() { 439 LOG1("stopPreview (pid %d)", getCallingPid()); 440 Mutex::Autolock lock(mLock); 441 if (checkPidAndHardware() != NO_ERROR) return; 442 443 444 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 445 mHardware->stopPreview(); 446 447 mPreviewBuffer.clear(); 448} 449 450// stop recording mode 451void CameraClient::stopRecording() { 452 LOG1("stopRecording (pid %d)", getCallingPid()); 453 Mutex::Autolock lock(mLock); 454 if (checkPidAndHardware() != NO_ERROR) return; 455 456 disableMsgType(CAMERA_MSG_VIDEO_FRAME); 457 mHardware->stopRecording(); 458 mCameraService->playSound(CameraService::SOUND_RECORDING); 459 460 mPreviewBuffer.clear(); 461} 462 463// release a recording frame 464void CameraClient::releaseRecordingFrame(const sp<IMemory>& mem) { 465 Mutex::Autolock lock(mLock); 466 if (checkPidAndHardware() != NO_ERROR) return; 467 mHardware->releaseRecordingFrame(mem); 468} 469 470status_t CameraClient::storeMetaDataInBuffers(bool enabled) 471{ 472 LOG1("storeMetaDataInBuffers: %s", enabled? "true": "false"); 473 Mutex::Autolock lock(mLock); 474 if (checkPidAndHardware() != NO_ERROR) { 475 return UNKNOWN_ERROR; 476 } 477 return mHardware->storeMetaDataInBuffers(enabled); 478} 479 480bool CameraClient::previewEnabled() { 481 LOG1("previewEnabled (pid %d)", getCallingPid()); 482 483 Mutex::Autolock lock(mLock); 484 if (checkPidAndHardware() != NO_ERROR) return false; 485 return mHardware->previewEnabled(); 486} 487 488bool CameraClient::recordingEnabled() { 489 LOG1("recordingEnabled (pid %d)", getCallingPid()); 490 491 Mutex::Autolock lock(mLock); 492 if (checkPidAndHardware() != NO_ERROR) return false; 493 return mHardware->recordingEnabled(); 494} 495 496status_t CameraClient::autoFocus() { 497 LOG1("autoFocus (pid %d)", getCallingPid()); 498 499 Mutex::Autolock lock(mLock); 500 status_t result = checkPidAndHardware(); 501 if (result != NO_ERROR) return result; 502 503 return mHardware->autoFocus(); 504} 505 506status_t CameraClient::cancelAutoFocus() { 507 LOG1("cancelAutoFocus (pid %d)", getCallingPid()); 508 509 Mutex::Autolock lock(mLock); 510 status_t result = checkPidAndHardware(); 511 if (result != NO_ERROR) return result; 512 513 return mHardware->cancelAutoFocus(); 514} 515 516// take a picture - image is returned in callback 517status_t CameraClient::takePicture(int msgType) { 518 LOG1("takePicture (pid %d): 0x%x", getCallingPid(), msgType); 519 520 Mutex::Autolock lock(mLock); 521 status_t result = checkPidAndHardware(); 522 if (result != NO_ERROR) return result; 523 524 if ((msgType & CAMERA_MSG_RAW_IMAGE) && 525 (msgType & CAMERA_MSG_RAW_IMAGE_NOTIFY)) { 526 ALOGE("CAMERA_MSG_RAW_IMAGE and CAMERA_MSG_RAW_IMAGE_NOTIFY" 527 " cannot be both enabled"); 528 return BAD_VALUE; 529 } 530 531 // We only accept picture related message types 532 // and ignore other types of messages for takePicture(). 533 int picMsgType = msgType 534 & (CAMERA_MSG_SHUTTER | 535 CAMERA_MSG_POSTVIEW_FRAME | 536 CAMERA_MSG_RAW_IMAGE | 537 CAMERA_MSG_RAW_IMAGE_NOTIFY | 538 CAMERA_MSG_COMPRESSED_IMAGE); 539 540 enableMsgType(picMsgType); 541 542 return mHardware->takePicture(); 543} 544 545// set preview/capture parameters - key/value pairs 546status_t CameraClient::setParameters(const String8& params) { 547 LOG1("setParameters (pid %d) (%s)", getCallingPid(), params.string()); 548 549 Mutex::Autolock lock(mLock); 550 status_t result = checkPidAndHardware(); 551 if (result != NO_ERROR) return result; 552 553 CameraParameters p(params); 554 return mHardware->setParameters(p); 555} 556 557// get preview/capture parameters - key/value pairs 558String8 CameraClient::getParameters() const { 559 Mutex::Autolock lock(mLock); 560 // The camera service can unconditionally get the parameters at all times 561 if (getCallingPid() != mServicePid && checkPidAndHardware() != NO_ERROR) return String8(); 562 563 String8 params(mHardware->getParameters().flatten()); 564 LOG1("getParameters (pid %d) (%s)", getCallingPid(), params.string()); 565 return params; 566} 567 568// enable shutter sound 569status_t CameraClient::enableShutterSound(bool enable) { 570 LOG1("enableShutterSound (pid %d)", getCallingPid()); 571 572 status_t result = checkPidAndHardware(); 573 if (result != NO_ERROR) return result; 574 575 if (enable) { 576 mPlayShutterSound = true; 577 return OK; 578 } 579 580 // the camera2 api legacy mode can unconditionally disable the shutter sound 581 if (mLegacyMode) { 582 ALOGV("%s: Disable shutter sound in legacy mode", __FUNCTION__); 583 mPlayShutterSound = false; 584 return OK; 585 } 586 587 // Disabling shutter sound may not be allowed. In that case only 588 // allow the mediaserver process to disable the sound. 589 char value[PROPERTY_VALUE_MAX]; 590 property_get("ro.camera.sound.forced", value, "0"); 591 if (strcmp(value, "0") != 0) { 592 // Disabling shutter sound is not allowed. Deny if the current 593 // process is not mediaserver. 594 if (getCallingPid() != getpid()) { 595 ALOGE("Failed to disable shutter sound. Permission denied (pid %d)", getCallingPid()); 596 return PERMISSION_DENIED; 597 } 598 } 599 600 mPlayShutterSound = false; 601 return OK; 602} 603 604status_t CameraClient::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) { 605 LOG1("sendCommand (pid %d)", getCallingPid()); 606 int orientation; 607 Mutex::Autolock lock(mLock); 608 status_t result = checkPidAndHardware(); 609 if (result != NO_ERROR) return result; 610 611 if (cmd == CAMERA_CMD_SET_DISPLAY_ORIENTATION) { 612 // Mirror the preview if the camera is front-facing. 613 orientation = getOrientation(arg1, mCameraFacing == CAMERA_FACING_FRONT); 614 if (orientation == -1) return BAD_VALUE; 615 616 if (mOrientation != orientation) { 617 mOrientation = orientation; 618 if (mPreviewWindow != 0) { 619 native_window_set_buffers_transform(mPreviewWindow.get(), 620 mOrientation); 621 } 622 } 623 return OK; 624 } else if (cmd == CAMERA_CMD_ENABLE_SHUTTER_SOUND) { 625 switch (arg1) { 626 case 0: 627 return enableShutterSound(false); 628 case 1: 629 return enableShutterSound(true); 630 default: 631 return BAD_VALUE; 632 } 633 return OK; 634 } else if (cmd == CAMERA_CMD_PLAY_RECORDING_SOUND) { 635 mCameraService->playSound(CameraService::SOUND_RECORDING); 636 } else if (cmd == CAMERA_CMD_SET_VIDEO_BUFFER_COUNT) { 637 // Silently ignore this command 638 return INVALID_OPERATION; 639 } else if (cmd == CAMERA_CMD_PING) { 640 // If mHardware is 0, checkPidAndHardware will return error. 641 return OK; 642 } 643 644 return mHardware->sendCommand(cmd, arg1, arg2); 645} 646 647// ---------------------------------------------------------------------------- 648 649void CameraClient::enableMsgType(int32_t msgType) { 650 android_atomic_or(msgType, &mMsgEnabled); 651 mHardware->enableMsgType(msgType); 652} 653 654void CameraClient::disableMsgType(int32_t msgType) { 655 android_atomic_and(~msgType, &mMsgEnabled); 656 mHardware->disableMsgType(msgType); 657} 658 659#define CHECK_MESSAGE_INTERVAL 10 // 10ms 660bool CameraClient::lockIfMessageWanted(int32_t msgType) { 661 int sleepCount = 0; 662 while (mMsgEnabled & msgType) { 663 if (mLock.tryLock() == NO_ERROR) { 664 if (sleepCount > 0) { 665 LOG1("lockIfMessageWanted(%d): waited for %d ms", 666 msgType, sleepCount * CHECK_MESSAGE_INTERVAL); 667 } 668 return true; 669 } 670 if (sleepCount++ == 0) { 671 LOG1("lockIfMessageWanted(%d): enter sleep", msgType); 672 } 673 usleep(CHECK_MESSAGE_INTERVAL * 1000); 674 } 675 ALOGW("lockIfMessageWanted(%d): dropped unwanted message", msgType); 676 return false; 677} 678 679// Callback messages can be dispatched to internal handlers or pass to our 680// client's callback functions, depending on the message type. 681// 682// notifyCallback: 683// CAMERA_MSG_SHUTTER handleShutter 684// (others) c->notifyCallback 685// dataCallback: 686// CAMERA_MSG_PREVIEW_FRAME handlePreviewData 687// CAMERA_MSG_POSTVIEW_FRAME handlePostview 688// CAMERA_MSG_RAW_IMAGE handleRawPicture 689// CAMERA_MSG_COMPRESSED_IMAGE handleCompressedPicture 690// (others) c->dataCallback 691// dataCallbackTimestamp 692// (others) c->dataCallbackTimestamp 693// 694// NOTE: the *Callback functions grab mLock of the client before passing 695// control to handle* functions. So the handle* functions must release the 696// lock before calling the ICameraClient's callbacks, so those callbacks can 697// invoke methods in the Client class again (For example, the preview frame 698// callback may want to releaseRecordingFrame). The handle* functions must 699// release the lock after all accesses to member variables, so it must be 700// handled very carefully. 701 702void CameraClient::notifyCallback(int32_t msgType, int32_t ext1, 703 int32_t ext2, void* user) { 704 LOG2("notifyCallback(%d)", msgType); 705 706 Mutex* lock = getClientLockFromCookie(user); 707 if (lock == NULL) return; 708 Mutex::Autolock alock(*lock); 709 710 CameraClient* client = 711 static_cast<CameraClient*>(getClientFromCookie(user)); 712 if (client == NULL) return; 713 714 if (!client->lockIfMessageWanted(msgType)) return; 715 716 switch (msgType) { 717 case CAMERA_MSG_SHUTTER: 718 // ext1 is the dimension of the yuv picture. 719 client->handleShutter(); 720 break; 721 default: 722 client->handleGenericNotify(msgType, ext1, ext2); 723 break; 724 } 725} 726 727void CameraClient::dataCallback(int32_t msgType, 728 const sp<IMemory>& dataPtr, camera_frame_metadata_t *metadata, void* user) { 729 LOG2("dataCallback(%d)", msgType); 730 731 Mutex* lock = getClientLockFromCookie(user); 732 if (lock == NULL) return; 733 Mutex::Autolock alock(*lock); 734 735 CameraClient* client = 736 static_cast<CameraClient*>(getClientFromCookie(user)); 737 if (client == NULL) return; 738 739 if (!client->lockIfMessageWanted(msgType)) return; 740 if (dataPtr == 0 && metadata == NULL) { 741 ALOGE("Null data returned in data callback"); 742 client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); 743 return; 744 } 745 746 switch (msgType & ~CAMERA_MSG_PREVIEW_METADATA) { 747 case CAMERA_MSG_PREVIEW_FRAME: 748 client->handlePreviewData(msgType, dataPtr, metadata); 749 break; 750 case CAMERA_MSG_POSTVIEW_FRAME: 751 client->handlePostview(dataPtr); 752 break; 753 case CAMERA_MSG_RAW_IMAGE: 754 client->handleRawPicture(dataPtr); 755 break; 756 case CAMERA_MSG_COMPRESSED_IMAGE: 757 client->handleCompressedPicture(dataPtr); 758 break; 759 default: 760 client->handleGenericData(msgType, dataPtr, metadata); 761 break; 762 } 763} 764 765void CameraClient::dataCallbackTimestamp(nsecs_t timestamp, 766 int32_t msgType, const sp<IMemory>& dataPtr, void* user) { 767 LOG2("dataCallbackTimestamp(%d)", msgType); 768 769 Mutex* lock = getClientLockFromCookie(user); 770 if (lock == NULL) return; 771 Mutex::Autolock alock(*lock); 772 773 CameraClient* client = 774 static_cast<CameraClient*>(getClientFromCookie(user)); 775 if (client == NULL) return; 776 777 if (!client->lockIfMessageWanted(msgType)) return; 778 779 if (dataPtr == 0) { 780 ALOGE("Null data returned in data with timestamp callback"); 781 client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); 782 return; 783 } 784 785 client->handleGenericDataTimestamp(timestamp, msgType, dataPtr); 786} 787 788// snapshot taken callback 789void CameraClient::handleShutter(void) { 790 if (mPlayShutterSound) { 791 mCameraService->playSound(CameraService::SOUND_SHUTTER); 792 } 793 794 sp<ICameraClient> c = mRemoteCallback; 795 if (c != 0) { 796 mLock.unlock(); 797 c->notifyCallback(CAMERA_MSG_SHUTTER, 0, 0); 798 if (!lockIfMessageWanted(CAMERA_MSG_SHUTTER)) return; 799 } 800 disableMsgType(CAMERA_MSG_SHUTTER); 801 802 mLock.unlock(); 803} 804 805// preview callback - frame buffer update 806void CameraClient::handlePreviewData(int32_t msgType, 807 const sp<IMemory>& mem, 808 camera_frame_metadata_t *metadata) { 809 ssize_t offset; 810 size_t size; 811 sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); 812 813 // local copy of the callback flags 814 int flags = mPreviewCallbackFlag; 815 816 // is callback enabled? 817 if (!(flags & CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK)) { 818 // If the enable bit is off, the copy-out and one-shot bits are ignored 819 LOG2("frame callback is disabled"); 820 mLock.unlock(); 821 return; 822 } 823 824 // hold a strong pointer to the client 825 sp<ICameraClient> c = mRemoteCallback; 826 827 // clear callback flags if no client or one-shot mode 828 if (c == 0 || (mPreviewCallbackFlag & CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK)) { 829 LOG2("Disable preview callback"); 830 mPreviewCallbackFlag &= ~(CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK | 831 CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK | 832 CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK); 833 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 834 } 835 836 if (c != 0) { 837 // Is the received frame copied out or not? 838 if (flags & CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK) { 839 LOG2("frame is copied"); 840 copyFrameAndPostCopiedFrame(msgType, c, heap, offset, size, metadata); 841 } else { 842 LOG2("frame is forwarded"); 843 mLock.unlock(); 844 c->dataCallback(msgType, mem, metadata); 845 } 846 } else { 847 mLock.unlock(); 848 } 849} 850 851// picture callback - postview image ready 852void CameraClient::handlePostview(const sp<IMemory>& mem) { 853 disableMsgType(CAMERA_MSG_POSTVIEW_FRAME); 854 855 sp<ICameraClient> c = mRemoteCallback; 856 mLock.unlock(); 857 if (c != 0) { 858 c->dataCallback(CAMERA_MSG_POSTVIEW_FRAME, mem, NULL); 859 } 860} 861 862// picture callback - raw image ready 863void CameraClient::handleRawPicture(const sp<IMemory>& mem) { 864 disableMsgType(CAMERA_MSG_RAW_IMAGE); 865 866 ssize_t offset; 867 size_t size; 868 sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); 869 870 sp<ICameraClient> c = mRemoteCallback; 871 mLock.unlock(); 872 if (c != 0) { 873 c->dataCallback(CAMERA_MSG_RAW_IMAGE, mem, NULL); 874 } 875} 876 877// picture callback - compressed picture ready 878void CameraClient::handleCompressedPicture(const sp<IMemory>& mem) { 879 disableMsgType(CAMERA_MSG_COMPRESSED_IMAGE); 880 881 sp<ICameraClient> c = mRemoteCallback; 882 mLock.unlock(); 883 if (c != 0) { 884 c->dataCallback(CAMERA_MSG_COMPRESSED_IMAGE, mem, NULL); 885 } 886} 887 888 889void CameraClient::handleGenericNotify(int32_t msgType, 890 int32_t ext1, int32_t ext2) { 891 sp<ICameraClient> c = mRemoteCallback; 892 mLock.unlock(); 893 if (c != 0) { 894 c->notifyCallback(msgType, ext1, ext2); 895 } 896} 897 898void CameraClient::handleGenericData(int32_t msgType, 899 const sp<IMemory>& dataPtr, camera_frame_metadata_t *metadata) { 900 sp<ICameraClient> c = mRemoteCallback; 901 mLock.unlock(); 902 if (c != 0) { 903 c->dataCallback(msgType, dataPtr, metadata); 904 } 905} 906 907void CameraClient::handleGenericDataTimestamp(nsecs_t timestamp, 908 int32_t msgType, const sp<IMemory>& dataPtr) { 909 sp<ICameraClient> c = mRemoteCallback; 910 mLock.unlock(); 911 if (c != 0) { 912 c->dataCallbackTimestamp(timestamp, msgType, dataPtr); 913 } 914} 915 916void CameraClient::copyFrameAndPostCopiedFrame( 917 int32_t msgType, const sp<ICameraClient>& client, 918 const sp<IMemoryHeap>& heap, size_t offset, size_t size, 919 camera_frame_metadata_t *metadata) { 920 LOG2("copyFrameAndPostCopiedFrame"); 921 // It is necessary to copy out of pmem before sending this to 922 // the callback. For efficiency, reuse the same MemoryHeapBase 923 // provided it's big enough. Don't allocate the memory or 924 // perform the copy if there's no callback. 925 // hold the preview lock while we grab a reference to the preview buffer 926 sp<MemoryHeapBase> previewBuffer; 927 928 if (mPreviewBuffer == 0) { 929 mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); 930 } else if (size > mPreviewBuffer->virtualSize()) { 931 mPreviewBuffer.clear(); 932 mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); 933 } 934 if (mPreviewBuffer == 0) { 935 ALOGE("failed to allocate space for preview buffer"); 936 mLock.unlock(); 937 return; 938 } 939 previewBuffer = mPreviewBuffer; 940 941 memcpy(previewBuffer->base(), (uint8_t *)heap->base() + offset, size); 942 943 sp<MemoryBase> frame = new MemoryBase(previewBuffer, 0, size); 944 if (frame == 0) { 945 ALOGE("failed to allocate space for frame callback"); 946 mLock.unlock(); 947 return; 948 } 949 950 mLock.unlock(); 951 client->dataCallback(msgType, frame, metadata); 952} 953 954int CameraClient::getOrientation(int degrees, bool mirror) { 955 if (!mirror) { 956 if (degrees == 0) return 0; 957 else if (degrees == 90) return HAL_TRANSFORM_ROT_90; 958 else if (degrees == 180) return HAL_TRANSFORM_ROT_180; 959 else if (degrees == 270) return HAL_TRANSFORM_ROT_270; 960 } else { // Do mirror (horizontal flip) 961 if (degrees == 0) { // FLIP_H and ROT_0 962 return HAL_TRANSFORM_FLIP_H; 963 } else if (degrees == 90) { // FLIP_H and ROT_90 964 return HAL_TRANSFORM_FLIP_H | HAL_TRANSFORM_ROT_90; 965 } else if (degrees == 180) { // FLIP_H and ROT_180 966 return HAL_TRANSFORM_FLIP_V; 967 } else if (degrees == 270) { // FLIP_H and ROT_270 968 return HAL_TRANSFORM_FLIP_V | HAL_TRANSFORM_ROT_90; 969 } 970 } 971 ALOGE("Invalid setDisplayOrientation degrees=%d", degrees); 972 return -1; 973} 974 975}; // namespace android 976