CameraDeviceClient.cpp revision 3c76fa3e73374dfe7bb93e1b03fed30749e1e4b9
1/* 2 * Copyright (C) 2013 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 "CameraDeviceClient" 18#define ATRACE_TAG ATRACE_TAG_CAMERA 19//#define LOG_NDEBUG 0 20 21#include <cutils/properties.h> 22#include <utils/Log.h> 23#include <utils/Trace.h> 24#include <gui/Surface.h> 25#include <camera/camera2/CaptureRequest.h> 26 27#include "common/CameraDeviceBase.h" 28#include "api2/CameraDeviceClient.h" 29 30 31 32namespace android { 33using namespace camera2; 34 35CameraDeviceClientBase::CameraDeviceClientBase( 36 const sp<CameraService>& cameraService, 37 const sp<ICameraDeviceCallbacks>& remoteCallback, 38 const String16& clientPackageName, 39 int cameraId, 40 int cameraFacing, 41 int clientPid, 42 uid_t clientUid, 43 int servicePid) : 44 BasicClient(cameraService, remoteCallback->asBinder(), clientPackageName, 45 cameraId, cameraFacing, clientPid, clientUid, servicePid), 46 mRemoteCallback(remoteCallback) { 47} 48 49// Interface used by CameraService 50 51CameraDeviceClient::CameraDeviceClient(const sp<CameraService>& cameraService, 52 const sp<ICameraDeviceCallbacks>& remoteCallback, 53 const String16& clientPackageName, 54 int cameraId, 55 int cameraFacing, 56 int clientPid, 57 uid_t clientUid, 58 int servicePid) : 59 Camera2ClientBase(cameraService, remoteCallback, clientPackageName, 60 cameraId, cameraFacing, clientPid, clientUid, servicePid), 61 mRequestIdCounter(0) { 62 63 ATRACE_CALL(); 64 ALOGI("CameraDeviceClient %d: Opened", cameraId); 65} 66 67status_t CameraDeviceClient::initialize(camera_module_t *module) 68{ 69 ATRACE_CALL(); 70 status_t res; 71 72 res = Camera2ClientBase::initialize(module); 73 if (res != OK) { 74 return res; 75 } 76 77 String8 threadName; 78 mFrameProcessor = new FrameProcessorBase(mDevice); 79 threadName = String8::format("CDU-%d-FrameProc", mCameraId); 80 mFrameProcessor->run(threadName.string()); 81 82 mFrameProcessor->registerListener(FRAME_PROCESSOR_LISTENER_MIN_ID, 83 FRAME_PROCESSOR_LISTENER_MAX_ID, 84 /*listener*/this, 85 /*quirkSendPartials*/true); 86 87 return OK; 88} 89 90CameraDeviceClient::~CameraDeviceClient() { 91} 92 93status_t CameraDeviceClient::submitRequest(sp<CaptureRequest> request, 94 bool streaming, 95 /*out*/ 96 int64_t* lastFrameNumber) { 97 List<sp<CaptureRequest> > requestList; 98 requestList.push_back(request); 99 return submitRequestList(requestList, streaming, lastFrameNumber); 100} 101 102status_t CameraDeviceClient::submitRequestList(List<sp<CaptureRequest> > requests, 103 bool streaming, int64_t* lastFrameNumber) { 104 ATRACE_CALL(); 105 ALOGV("%s-start of function. Request list size %d", __FUNCTION__, requests.size()); 106 107 status_t res; 108 if ( (res = checkPid(__FUNCTION__) ) != OK) return res; 109 110 Mutex::Autolock icl(mBinderSerializationLock); 111 112 if (!mDevice.get()) return DEAD_OBJECT; 113 114 if (requests.empty()) { 115 ALOGE("%s: Camera %d: Sent null request. Rejecting request.", 116 __FUNCTION__, mCameraId); 117 return BAD_VALUE; 118 } 119 120 List<const CameraMetadata> metadataRequestList; 121 int32_t requestId = mRequestIdCounter; 122 uint32_t loopCounter = 0; 123 124 for (List<sp<CaptureRequest> >::iterator it = requests.begin(); it != requests.end(); ++it) { 125 sp<CaptureRequest> request = *it; 126 if (request == 0) { 127 ALOGE("%s: Camera %d: Sent null request.", 128 __FUNCTION__, mCameraId); 129 return BAD_VALUE; 130 } 131 132 CameraMetadata metadata(request->mMetadata); 133 if (metadata.isEmpty()) { 134 ALOGE("%s: Camera %d: Sent empty metadata packet. Rejecting request.", 135 __FUNCTION__, mCameraId); 136 return BAD_VALUE; 137 } else if (request->mSurfaceList.isEmpty()) { 138 ALOGE("%s: Camera %d: Requests must have at least one surface target. " 139 "Rejecting request.", __FUNCTION__, mCameraId); 140 return BAD_VALUE; 141 } 142 143 if (!enforceRequestPermissions(metadata)) { 144 // Callee logs 145 return PERMISSION_DENIED; 146 } 147 148 /** 149 * Write in the output stream IDs which we calculate from 150 * the capture request's list of surface targets 151 */ 152 Vector<int32_t> outputStreamIds; 153 outputStreamIds.setCapacity(request->mSurfaceList.size()); 154 for (size_t i = 0; i < request->mSurfaceList.size(); ++i) { 155 sp<Surface> surface = request->mSurfaceList[i]; 156 if (surface == 0) continue; 157 158 sp<IGraphicBufferProducer> gbp = surface->getIGraphicBufferProducer(); 159 int idx = mStreamMap.indexOfKey(gbp->asBinder()); 160 161 // Trying to submit request with surface that wasn't created 162 if (idx == NAME_NOT_FOUND) { 163 ALOGE("%s: Camera %d: Tried to submit a request with a surface that" 164 " we have not called createStream on", 165 __FUNCTION__, mCameraId); 166 return BAD_VALUE; 167 } 168 169 int streamId = mStreamMap.valueAt(idx); 170 outputStreamIds.push_back(streamId); 171 ALOGV("%s: Camera %d: Appending output stream %d to request", 172 __FUNCTION__, mCameraId, streamId); 173 } 174 175 metadata.update(ANDROID_REQUEST_OUTPUT_STREAMS, &outputStreamIds[0], 176 outputStreamIds.size()); 177 178 metadata.update(ANDROID_REQUEST_ID, &requestId, /*size*/1); 179 loopCounter++; // loopCounter starts from 1 180 ALOGV("%s: Camera %d: Creating request with ID %d (%d of %d)", 181 __FUNCTION__, mCameraId, requestId, loopCounter, requests.size()); 182 183 metadataRequestList.push_back(metadata); 184 } 185 mRequestIdCounter++; 186 187 if (streaming) { 188 res = mDevice->setStreamingRequestList(metadataRequestList, lastFrameNumber); 189 if (res != OK) { 190 ALOGE("%s: Camera %d: Got error %d after trying to set streaming " 191 "request", __FUNCTION__, mCameraId, res); 192 } else { 193 mStreamingRequestList.push_back(requestId); 194 } 195 } else { 196 res = mDevice->captureList(metadataRequestList, lastFrameNumber); 197 if (res != OK) { 198 ALOGE("%s: Camera %d: Got error %d after trying to set capture", 199 __FUNCTION__, mCameraId, res); 200 } 201 ALOGV("%s: requestId = %d ", __FUNCTION__, requestId); 202 } 203 204 ALOGV("%s: Camera %d: End of function", __FUNCTION__, mCameraId); 205 if (res == OK) { 206 return requestId; 207 } 208 209 return res; 210} 211 212status_t CameraDeviceClient::cancelRequest(int requestId, int64_t* lastFrameNumber) { 213 ATRACE_CALL(); 214 ALOGV("%s, requestId = %d", __FUNCTION__, requestId); 215 216 status_t res; 217 218 if ( (res = checkPid(__FUNCTION__) ) != OK) return res; 219 220 Mutex::Autolock icl(mBinderSerializationLock); 221 222 if (!mDevice.get()) return DEAD_OBJECT; 223 224 Vector<int>::iterator it, end; 225 for (it = mStreamingRequestList.begin(), end = mStreamingRequestList.end(); 226 it != end; ++it) { 227 if (*it == requestId) { 228 break; 229 } 230 } 231 232 if (it == end) { 233 ALOGE("%s: Camera%d: Did not find request id %d in list of streaming " 234 "requests", __FUNCTION__, mCameraId, requestId); 235 return BAD_VALUE; 236 } 237 238 res = mDevice->clearStreamingRequest(lastFrameNumber); 239 240 if (res == OK) { 241 ALOGV("%s: Camera %d: Successfully cleared streaming request", 242 __FUNCTION__, mCameraId); 243 mStreamingRequestList.erase(it); 244 } 245 246 return res; 247} 248 249status_t CameraDeviceClient::deleteStream(int streamId) { 250 ATRACE_CALL(); 251 ALOGV("%s (streamId = 0x%x)", __FUNCTION__, streamId); 252 253 status_t res; 254 if ( (res = checkPid(__FUNCTION__) ) != OK) return res; 255 256 Mutex::Autolock icl(mBinderSerializationLock); 257 258 if (!mDevice.get()) return DEAD_OBJECT; 259 260 // Guard against trying to delete non-created streams 261 ssize_t index = NAME_NOT_FOUND; 262 for (size_t i = 0; i < mStreamMap.size(); ++i) { 263 if (streamId == mStreamMap.valueAt(i)) { 264 index = i; 265 break; 266 } 267 } 268 269 if (index == NAME_NOT_FOUND) { 270 ALOGW("%s: Camera %d: Invalid stream ID (%d) specified, no stream " 271 "created yet", __FUNCTION__, mCameraId, streamId); 272 return BAD_VALUE; 273 } 274 275 // Also returns BAD_VALUE if stream ID was not valid 276 res = mDevice->deleteStream(streamId); 277 278 if (res == BAD_VALUE) { 279 ALOGE("%s: Camera %d: Unexpected BAD_VALUE when deleting stream, but we" 280 " already checked and the stream ID (%d) should be valid.", 281 __FUNCTION__, mCameraId, streamId); 282 } else if (res == OK) { 283 mStreamMap.removeItemsAt(index); 284 285 } 286 287 return res; 288} 289 290status_t CameraDeviceClient::createStream(int width, int height, int format, 291 const sp<IGraphicBufferProducer>& bufferProducer) 292{ 293 ATRACE_CALL(); 294 ALOGV("%s (w = %d, h = %d, f = 0x%x)", __FUNCTION__, width, height, format); 295 296 status_t res; 297 if ( (res = checkPid(__FUNCTION__) ) != OK) return res; 298 299 Mutex::Autolock icl(mBinderSerializationLock); 300 301 if (!mDevice.get()) return DEAD_OBJECT; 302 303 // Don't create multiple streams for the same target surface 304 { 305 ssize_t index = mStreamMap.indexOfKey(bufferProducer->asBinder()); 306 if (index != NAME_NOT_FOUND) { 307 ALOGW("%s: Camera %d: Buffer producer already has a stream for it " 308 "(ID %zd)", 309 __FUNCTION__, mCameraId, index); 310 return ALREADY_EXISTS; 311 } 312 } 313 314 // HACK b/10949105 315 // Query consumer usage bits to set async operation mode for 316 // GLConsumer using controlledByApp parameter. 317 bool useAsync = false; 318 int32_t consumerUsage; 319 if ((res = bufferProducer->query(NATIVE_WINDOW_CONSUMER_USAGE_BITS, 320 &consumerUsage)) != OK) { 321 ALOGE("%s: Camera %d: Failed to query consumer usage", __FUNCTION__, 322 mCameraId); 323 return res; 324 } 325 if (consumerUsage & GraphicBuffer::USAGE_HW_TEXTURE) { 326 ALOGW("%s: Camera %d: Forcing asynchronous mode for stream", 327 __FUNCTION__, mCameraId); 328 useAsync = true; 329 } 330 331 sp<IBinder> binder; 332 sp<ANativeWindow> anw; 333 if (bufferProducer != 0) { 334 binder = bufferProducer->asBinder(); 335 anw = new Surface(bufferProducer, useAsync); 336 } 337 338 // TODO: remove w,h,f since we are ignoring them 339 340 if ((res = anw->query(anw.get(), NATIVE_WINDOW_WIDTH, &width)) != OK) { 341 ALOGE("%s: Camera %d: Failed to query Surface width", __FUNCTION__, 342 mCameraId); 343 return res; 344 } 345 if ((res = anw->query(anw.get(), NATIVE_WINDOW_HEIGHT, &height)) != OK) { 346 ALOGE("%s: Camera %d: Failed to query Surface height", __FUNCTION__, 347 mCameraId); 348 return res; 349 } 350 if ((res = anw->query(anw.get(), NATIVE_WINDOW_FORMAT, &format)) != OK) { 351 ALOGE("%s: Camera %d: Failed to query Surface format", __FUNCTION__, 352 mCameraId); 353 return res; 354 } 355 356 // FIXME: remove this override since the default format should be 357 // IMPLEMENTATION_DEFINED. b/9487482 358 if (format >= HAL_PIXEL_FORMAT_RGBA_8888 && 359 format <= HAL_PIXEL_FORMAT_BGRA_8888) { 360 ALOGW("%s: Camera %d: Overriding format 0x%x to IMPLEMENTATION_DEFINED", 361 __FUNCTION__, mCameraId, format); 362 format = HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED; 363 } 364 365 // TODO: add startConfigure/stopConfigure call to CameraDeviceBase 366 // this will make it so Camera3Device doesn't call configure_streams 367 // after each call, but only once we are done with all. 368 369 int streamId = -1; 370 if (format == HAL_PIXEL_FORMAT_BLOB) { 371 // JPEG buffers need to be sized for maximum possible compressed size 372 CameraMetadata staticInfo = mDevice->info(); 373 camera_metadata_entry_t entry = staticInfo.find(ANDROID_JPEG_MAX_SIZE); 374 if (entry.count == 0) { 375 ALOGE("%s: Camera %d: Can't find maximum JPEG size in " 376 "static metadata!", __FUNCTION__, mCameraId); 377 return INVALID_OPERATION; 378 } 379 int32_t maxJpegSize = entry.data.i32[0]; 380 res = mDevice->createStream(anw, width, height, format, maxJpegSize, 381 &streamId); 382 } else { 383 // All other streams are a known size 384 res = mDevice->createStream(anw, width, height, format, /*size*/0, 385 &streamId); 386 } 387 388 if (res == OK) { 389 mStreamMap.add(bufferProducer->asBinder(), streamId); 390 391 ALOGV("%s: Camera %d: Successfully created a new stream ID %d", 392 __FUNCTION__, mCameraId, streamId); 393 394 /** 395 * Set the stream transform flags to automatically 396 * rotate the camera stream for preview use cases. 397 */ 398 int32_t transform = 0; 399 res = getRotationTransformLocked(&transform); 400 401 if (res != OK) { 402 // Error logged by getRotationTransformLocked. 403 return res; 404 } 405 406 res = mDevice->setStreamTransform(streamId, transform); 407 if (res != OK) { 408 ALOGE("%s: Failed to set stream transform (stream id %d)", 409 __FUNCTION__, streamId); 410 return res; 411 } 412 413 return streamId; 414 } 415 416 return res; 417} 418 419// Create a request object from a template. 420status_t CameraDeviceClient::createDefaultRequest(int templateId, 421 /*out*/ 422 CameraMetadata* request) 423{ 424 ATRACE_CALL(); 425 ALOGV("%s (templateId = 0x%x)", __FUNCTION__, templateId); 426 427 status_t res; 428 if ( (res = checkPid(__FUNCTION__) ) != OK) return res; 429 430 Mutex::Autolock icl(mBinderSerializationLock); 431 432 if (!mDevice.get()) return DEAD_OBJECT; 433 434 CameraMetadata metadata; 435 if ( (res = mDevice->createDefaultRequest(templateId, &metadata) ) == OK && 436 request != NULL) { 437 438 request->swap(metadata); 439 } 440 441 return res; 442} 443 444status_t CameraDeviceClient::getCameraInfo(/*out*/CameraMetadata* info) 445{ 446 ATRACE_CALL(); 447 ALOGV("%s", __FUNCTION__); 448 449 status_t res = OK; 450 451 if ( (res = checkPid(__FUNCTION__) ) != OK) return res; 452 453 Mutex::Autolock icl(mBinderSerializationLock); 454 455 if (!mDevice.get()) return DEAD_OBJECT; 456 457 if (info != NULL) { 458 *info = mDevice->info(); // static camera metadata 459 // TODO: merge with device-specific camera metadata 460 } 461 462 return res; 463} 464 465status_t CameraDeviceClient::waitUntilIdle() 466{ 467 ATRACE_CALL(); 468 ALOGV("%s", __FUNCTION__); 469 470 status_t res = OK; 471 if ( (res = checkPid(__FUNCTION__) ) != OK) return res; 472 473 Mutex::Autolock icl(mBinderSerializationLock); 474 475 if (!mDevice.get()) return DEAD_OBJECT; 476 477 // FIXME: Also need check repeating burst. 478 if (!mStreamingRequestList.isEmpty()) { 479 ALOGE("%s: Camera %d: Try to waitUntilIdle when there are active streaming requests", 480 __FUNCTION__, mCameraId); 481 return INVALID_OPERATION; 482 } 483 res = mDevice->waitUntilDrained(); 484 ALOGV("%s Done", __FUNCTION__); 485 486 return res; 487} 488 489status_t CameraDeviceClient::flush(int64_t* lastFrameNumber) { 490 ATRACE_CALL(); 491 ALOGV("%s", __FUNCTION__); 492 493 status_t res = OK; 494 if ( (res = checkPid(__FUNCTION__) ) != OK) return res; 495 496 Mutex::Autolock icl(mBinderSerializationLock); 497 498 if (!mDevice.get()) return DEAD_OBJECT; 499 500 mStreamingRequestList.clear(); 501 return mDevice->flush(lastFrameNumber); 502} 503 504status_t CameraDeviceClient::dump(int fd, const Vector<String16>& args) { 505 String8 result; 506 result.appendFormat("CameraDeviceClient[%d] (%p) PID: %d, dump:\n", 507 mCameraId, 508 getRemoteCallback()->asBinder().get(), 509 mClientPid); 510 result.append(" State: "); 511 512 // TODO: print dynamic/request section from most recent requests 513 mFrameProcessor->dump(fd, args); 514 515 return dumpDevice(fd, args); 516} 517 518void CameraDeviceClient::notifyError(ICameraDeviceCallbacks::CameraErrorCode errorCode, 519 const CaptureResultExtras& resultExtras) { 520 // Thread safe. Don't bother locking. 521 sp<ICameraDeviceCallbacks> remoteCb = getRemoteCallback(); 522 523 if (remoteCb != 0) { 524 remoteCb->onDeviceError(errorCode, resultExtras); 525 } 526} 527 528void CameraDeviceClient::notifyIdle() { 529 // Thread safe. Don't bother locking. 530 sp<ICameraDeviceCallbacks> remoteCb = getRemoteCallback(); 531 532 if (remoteCb != 0) { 533 remoteCb->onDeviceIdle(); 534 } 535} 536 537void CameraDeviceClient::notifyShutter(const CaptureResultExtras& resultExtras, 538 nsecs_t timestamp) { 539 // Thread safe. Don't bother locking. 540 sp<ICameraDeviceCallbacks> remoteCb = getRemoteCallback(); 541 if (remoteCb != 0) { 542 remoteCb->onCaptureStarted(resultExtras, timestamp); 543 } 544} 545 546// TODO: refactor the code below this with IProCameraUser. 547// it's 100% copy-pasted, so lets not change it right now to make it easier. 548 549void CameraDeviceClient::detachDevice() { 550 if (mDevice == 0) return; 551 552 ALOGV("Camera %d: Stopping processors", mCameraId); 553 554 mFrameProcessor->removeListener(FRAME_PROCESSOR_LISTENER_MIN_ID, 555 FRAME_PROCESSOR_LISTENER_MAX_ID, 556 /*listener*/this); 557 mFrameProcessor->requestExit(); 558 ALOGV("Camera %d: Waiting for threads", mCameraId); 559 mFrameProcessor->join(); 560 ALOGV("Camera %d: Disconnecting device", mCameraId); 561 562 // WORKAROUND: HAL refuses to disconnect while there's streams in flight 563 { 564 mDevice->clearStreamingRequest(); 565 566 status_t code; 567 if ((code = mDevice->waitUntilDrained()) != OK) { 568 ALOGE("%s: waitUntilDrained failed with code 0x%x", __FUNCTION__, 569 code); 570 } 571 } 572 573 Camera2ClientBase::detachDevice(); 574} 575 576/** Device-related methods */ 577void CameraDeviceClient::onResultAvailable(const CaptureResult& result) { 578 ATRACE_CALL(); 579 ALOGV("%s", __FUNCTION__); 580 581 // Thread-safe. No lock necessary. 582 sp<ICameraDeviceCallbacks> remoteCb = mRemoteCallback; 583 if (remoteCb != NULL) { 584 remoteCb->onResultReceived(result.mMetadata, result.mResultExtras); 585 } 586} 587 588// TODO: move to Camera2ClientBase 589bool CameraDeviceClient::enforceRequestPermissions(CameraMetadata& metadata) { 590 591 const int pid = IPCThreadState::self()->getCallingPid(); 592 const int selfPid = getpid(); 593 camera_metadata_entry_t entry; 594 595 /** 596 * Mixin default important security values 597 * - android.led.transmit = defaulted ON 598 */ 599 CameraMetadata staticInfo = mDevice->info(); 600 entry = staticInfo.find(ANDROID_LED_AVAILABLE_LEDS); 601 for(size_t i = 0; i < entry.count; ++i) { 602 uint8_t led = entry.data.u8[i]; 603 604 switch(led) { 605 case ANDROID_LED_AVAILABLE_LEDS_TRANSMIT: { 606 uint8_t transmitDefault = ANDROID_LED_TRANSMIT_ON; 607 if (!metadata.exists(ANDROID_LED_TRANSMIT)) { 608 metadata.update(ANDROID_LED_TRANSMIT, 609 &transmitDefault, 1); 610 } 611 break; 612 } 613 } 614 } 615 616 // We can do anything! 617 if (pid == selfPid) { 618 return true; 619 } 620 621 /** 622 * Permission check special fields in the request 623 * - android.led.transmit = android.permission.CAMERA_DISABLE_TRANSMIT 624 */ 625 entry = metadata.find(ANDROID_LED_TRANSMIT); 626 if (entry.count > 0 && entry.data.u8[0] != ANDROID_LED_TRANSMIT_ON) { 627 String16 permissionString = 628 String16("android.permission.CAMERA_DISABLE_TRANSMIT_LED"); 629 if (!checkCallingPermission(permissionString)) { 630 const int uid = IPCThreadState::self()->getCallingUid(); 631 ALOGE("Permission Denial: " 632 "can't disable transmit LED pid=%d, uid=%d", pid, uid); 633 return false; 634 } 635 } 636 637 return true; 638} 639 640status_t CameraDeviceClient::getRotationTransformLocked(int32_t* transform) { 641 ALOGV("%s: begin", __FUNCTION__); 642 643 if (transform == NULL) { 644 ALOGW("%s: null transform", __FUNCTION__); 645 return BAD_VALUE; 646 } 647 648 *transform = 0; 649 650 const CameraMetadata& staticInfo = mDevice->info(); 651 camera_metadata_ro_entry_t entry = staticInfo.find(ANDROID_SENSOR_ORIENTATION); 652 if (entry.count == 0) { 653 ALOGE("%s: Camera %d: Can't find android.sensor.orientation in " 654 "static metadata!", __FUNCTION__, mCameraId); 655 return INVALID_OPERATION; 656 } 657 658 camera_metadata_ro_entry_t entryFacing = staticInfo.find(ANDROID_LENS_FACING); 659 if (entry.count == 0) { 660 ALOGE("%s: Camera %d: Can't find android.lens.facing in " 661 "static metadata!", __FUNCTION__, mCameraId); 662 return INVALID_OPERATION; 663 } 664 665 int32_t& flags = *transform; 666 667 bool mirror = (entryFacing.data.u8[0] == ANDROID_LENS_FACING_FRONT); 668 int orientation = entry.data.i32[0]; 669 if (!mirror) { 670 switch (orientation) { 671 case 0: 672 flags = 0; 673 break; 674 case 90: 675 flags = NATIVE_WINDOW_TRANSFORM_ROT_90; 676 break; 677 case 180: 678 flags = NATIVE_WINDOW_TRANSFORM_ROT_180; 679 break; 680 case 270: 681 flags = NATIVE_WINDOW_TRANSFORM_ROT_270; 682 break; 683 default: 684 ALOGE("%s: Invalid HAL android.sensor.orientation value: %d", 685 __FUNCTION__, orientation); 686 return INVALID_OPERATION; 687 } 688 } else { 689 switch (orientation) { 690 case 0: 691 flags = HAL_TRANSFORM_FLIP_H; 692 break; 693 case 90: 694 flags = HAL_TRANSFORM_FLIP_H | HAL_TRANSFORM_ROT_90; 695 break; 696 case 180: 697 flags = HAL_TRANSFORM_FLIP_V; 698 break; 699 case 270: 700 flags = HAL_TRANSFORM_FLIP_V | HAL_TRANSFORM_ROT_90; 701 break; 702 default: 703 ALOGE("%s: Invalid HAL android.sensor.orientation value: %d", 704 __FUNCTION__, orientation); 705 return INVALID_OPERATION; 706 } 707 708 } 709 710 /** 711 * This magic flag makes surfaceflinger un-rotate the buffers 712 * to counter the extra global device UI rotation whenever the user 713 * physically rotates the device. 714 * 715 * By doing this, the camera buffer always ends up aligned 716 * with the physical camera for a "see through" effect. 717 * 718 * In essence, the buffer only gets rotated during preview use-cases. 719 * The user is still responsible to re-create streams of the proper 720 * aspect ratio, or the preview will end up looking non-uniformly 721 * stretched. 722 */ 723 flags |= NATIVE_WINDOW_TRANSFORM_INVERSE_DISPLAY; 724 725 ALOGV("%s: final transform = 0x%x", __FUNCTION__, flags); 726 727 return OK; 728} 729 730} // namespace android 731