CameraClient.cpp revision 44f120fa169cb3131ec853c638ea9c88a9b33b97
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 // set mClientPid to let disconnet() tear down the hardware 106 mClientPid = callingPid; 107 disconnect(); 108 LOG1("CameraClient::~CameraClient X (pid %d, this %p)", callingPid, this); 109} 110 111status_t CameraClient::dump(int fd, const Vector<String16>& args) { 112 const size_t SIZE = 256; 113 char buffer[SIZE]; 114 115 size_t len = snprintf(buffer, SIZE, "Client[%d] (%p) PID: %d\n", 116 mCameraId, 117 getCameraClient()->asBinder().get(), 118 mClientPid); 119 len = (len > SIZE - 1) ? SIZE - 1 : len; 120 write(fd, buffer, len); 121 return mHardware->dump(fd, args); 122} 123 124// ---------------------------------------------------------------------------- 125 126status_t CameraClient::checkPid() const { 127 int callingPid = getCallingPid(); 128 if (callingPid == mClientPid || callingPid == mServicePid) return NO_ERROR; 129 130 ALOGW("attempt to use a locked camera from a different process" 131 " (old pid %d, new pid %d)", mClientPid, callingPid); 132 return EBUSY; 133} 134 135status_t CameraClient::checkPidAndHardware() const { 136 status_t result = checkPid(); 137 if (result != NO_ERROR) return result; 138 if (mHardware == 0) { 139 ALOGE("attempt to use a camera after disconnect() (pid %d)", getCallingPid()); 140 return INVALID_OPERATION; 141 } 142 return NO_ERROR; 143} 144 145status_t CameraClient::lock() { 146 int callingPid = getCallingPid(); 147 LOG1("lock (pid %d)", callingPid); 148 Mutex::Autolock lock(mLock); 149 150 // lock camera to this client if the the camera is unlocked 151 if (mClientPid == 0) { 152 mClientPid = callingPid; 153 return NO_ERROR; 154 } 155 156 // returns NO_ERROR if the client already owns the camera, EBUSY otherwise 157 return checkPid(); 158} 159 160status_t CameraClient::unlock() { 161 int callingPid = getCallingPid(); 162 LOG1("unlock (pid %d)", callingPid); 163 Mutex::Autolock lock(mLock); 164 165 // allow anyone to use camera (after they lock the camera) 166 status_t result = checkPid(); 167 if (result == NO_ERROR) { 168 if (mHardware->recordingEnabled()) { 169 ALOGE("Not allowed to unlock camera during recording."); 170 return INVALID_OPERATION; 171 } 172 mClientPid = 0; 173 LOG1("clear mCameraClient (pid %d)", callingPid); 174 // we need to remove the reference to ICameraClient so that when the app 175 // goes away, the reference count goes to 0. 176 mCameraClient.clear(); 177 } 178 return result; 179} 180 181// connect a new client to the camera 182status_t CameraClient::connect(const sp<ICameraClient>& client) { 183 int callingPid = getCallingPid(); 184 LOG1("connect E (pid %d)", callingPid); 185 Mutex::Autolock lock(mLock); 186 187 if (mClientPid != 0 && checkPid() != NO_ERROR) { 188 ALOGW("Tried to connect to a locked camera (old pid %d, new pid %d)", 189 mClientPid, callingPid); 190 return EBUSY; 191 } 192 193 if (mCameraClient != 0 && (client->asBinder() == mCameraClient->asBinder())) { 194 LOG1("Connect to the same client"); 195 return NO_ERROR; 196 } 197 198 mPreviewCallbackFlag = CAMERA_FRAME_CALLBACK_FLAG_NOOP; 199 mClientPid = callingPid; 200 mCameraClient = client; 201 202 LOG1("connect X (pid %d)", callingPid); 203 return NO_ERROR; 204} 205 206static void disconnectWindow(const sp<ANativeWindow>& window) { 207 if (window != 0) { 208 status_t result = native_window_api_disconnect(window.get(), 209 NATIVE_WINDOW_API_CAMERA); 210 if (result != NO_ERROR) { 211 ALOGW("native_window_api_disconnect failed: %s (%d)", strerror(-result), 212 result); 213 } 214 } 215} 216 217void CameraClient::disconnect() { 218 int callingPid = getCallingPid(); 219 LOG1("disconnect E (pid %d)", callingPid); 220 Mutex::Autolock lock(mLock); 221 222 if (checkPid() != NO_ERROR) { 223 ALOGW("different client - don't disconnect"); 224 return; 225 } 226 227 if (mClientPid <= 0) { 228 LOG1("camera is unlocked (mClientPid = %d), don't tear down hardware", mClientPid); 229 return; 230 } 231 232 // Make sure disconnect() is done once and once only, whether it is called 233 // from the user directly, or called by the destructor. 234 if (mHardware == 0) return; 235 236 LOG1("hardware teardown"); 237 // Before destroying mHardware, we must make sure it's in the 238 // idle state. 239 // Turn off all messages. 240 disableMsgType(CAMERA_MSG_ALL_MSGS); 241 mHardware->stopPreview(); 242 mHardware->cancelPicture(); 243 // Release the hardware resources. 244 mHardware->release(); 245 246 // Release the held ANativeWindow resources. 247 if (mPreviewWindow != 0) { 248 disconnectWindow(mPreviewWindow); 249 mPreviewWindow = 0; 250 mHardware->setPreviewWindow(mPreviewWindow); 251 } 252 mHardware.clear(); 253 254 CameraService::Client::disconnect(); 255 256 LOG1("disconnect X (pid %d)", callingPid); 257} 258 259// ---------------------------------------------------------------------------- 260 261status_t CameraClient::setPreviewWindow(const sp<IBinder>& binder, 262 const sp<ANativeWindow>& window) { 263 Mutex::Autolock lock(mLock); 264 status_t result = checkPidAndHardware(); 265 if (result != NO_ERROR) return result; 266 267 // return if no change in surface. 268 if (binder == mSurface) { 269 return NO_ERROR; 270 } 271 272 if (window != 0) { 273 result = native_window_api_connect(window.get(), NATIVE_WINDOW_API_CAMERA); 274 if (result != NO_ERROR) { 275 ALOGE("native_window_api_connect failed: %s (%d)", strerror(-result), 276 result); 277 return result; 278 } 279 } 280 281 // If preview has been already started, register preview buffers now. 282 if (mHardware->previewEnabled()) { 283 if (window != 0) { 284 native_window_set_scaling_mode(window.get(), 285 NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW); 286 native_window_set_buffers_transform(window.get(), mOrientation); 287 result = mHardware->setPreviewWindow(window); 288 } 289 } 290 291 if (result == NO_ERROR) { 292 // Everything has succeeded. Disconnect the old window and remember the 293 // new window. 294 disconnectWindow(mPreviewWindow); 295 mSurface = binder; 296 mPreviewWindow = window; 297 } else { 298 // Something went wrong after we connected to the new window, so 299 // disconnect here. 300 disconnectWindow(window); 301 } 302 303 return result; 304} 305 306// set the Surface that the preview will use 307status_t CameraClient::setPreviewDisplay(const sp<Surface>& surface) { 308 LOG1("setPreviewDisplay(%p) (pid %d)", surface.get(), getCallingPid()); 309 310 sp<IBinder> binder(surface != 0 ? surface->asBinder() : 0); 311 sp<ANativeWindow> window(surface); 312 return setPreviewWindow(binder, window); 313} 314 315// set the SurfaceTexture that the preview will use 316status_t CameraClient::setPreviewTexture( 317 const sp<ISurfaceTexture>& surfaceTexture) { 318 LOG1("setPreviewTexture(%p) (pid %d)", surfaceTexture.get(), 319 getCallingPid()); 320 321 sp<IBinder> binder; 322 sp<ANativeWindow> window; 323 if (surfaceTexture != 0) { 324 binder = surfaceTexture->asBinder(); 325 window = new SurfaceTextureClient(surfaceTexture); 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} 344 345// start preview mode 346status_t CameraClient::startPreview() { 347 LOG1("startPreview (pid %d)", getCallingPid()); 348 return startCameraMode(CAMERA_PREVIEW_MODE); 349} 350 351// start recording mode 352status_t CameraClient::startRecording() { 353 LOG1("startRecording (pid %d)", getCallingPid()); 354 return startCameraMode(CAMERA_RECORDING_MODE); 355} 356 357// start preview or recording 358status_t CameraClient::startCameraMode(camera_mode mode) { 359 LOG1("startCameraMode(%d)", mode); 360 Mutex::Autolock lock(mLock); 361 status_t result = checkPidAndHardware(); 362 if (result != NO_ERROR) return result; 363 364 switch(mode) { 365 case CAMERA_PREVIEW_MODE: 366 if (mSurface == 0 && mPreviewWindow == 0) { 367 LOG1("mSurface is not set yet."); 368 // still able to start preview in this case. 369 } 370 return startPreviewMode(); 371 case CAMERA_RECORDING_MODE: 372 if (mSurface == 0 && mPreviewWindow == 0) { 373 ALOGE("mSurface or mPreviewWindow must be set before startRecordingMode."); 374 return INVALID_OPERATION; 375 } 376 return startRecordingMode(); 377 default: 378 return UNKNOWN_ERROR; 379 } 380} 381 382status_t CameraClient::startPreviewMode() { 383 LOG1("startPreviewMode"); 384 status_t result = NO_ERROR; 385 386 // if preview has been enabled, nothing needs to be done 387 if (mHardware->previewEnabled()) { 388 return NO_ERROR; 389 } 390 391 if (mPreviewWindow != 0) { 392 native_window_set_scaling_mode(mPreviewWindow.get(), 393 NATIVE_WINDOW_SCALING_MODE_SCALE_TO_WINDOW); 394 native_window_set_buffers_transform(mPreviewWindow.get(), 395 mOrientation); 396 } 397 mHardware->setPreviewWindow(mPreviewWindow); 398 result = mHardware->startPreview(); 399 400 return result; 401} 402 403status_t CameraClient::startRecordingMode() { 404 LOG1("startRecordingMode"); 405 status_t result = NO_ERROR; 406 407 // if recording has been enabled, nothing needs to be done 408 if (mHardware->recordingEnabled()) { 409 return NO_ERROR; 410 } 411 412 // if preview has not been started, start preview first 413 if (!mHardware->previewEnabled()) { 414 result = startPreviewMode(); 415 if (result != NO_ERROR) { 416 return result; 417 } 418 } 419 420 // start recording mode 421 enableMsgType(CAMERA_MSG_VIDEO_FRAME); 422 mCameraService->playSound(CameraService::SOUND_RECORDING); 423 result = mHardware->startRecording(); 424 if (result != NO_ERROR) { 425 ALOGE("mHardware->startRecording() failed with status %d", result); 426 } 427 return result; 428} 429 430// stop preview mode 431void CameraClient::stopPreview() { 432 LOG1("stopPreview (pid %d)", getCallingPid()); 433 Mutex::Autolock lock(mLock); 434 if (checkPidAndHardware() != NO_ERROR) return; 435 436 437 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 438 mHardware->stopPreview(); 439 440 mPreviewBuffer.clear(); 441} 442 443// stop recording mode 444void CameraClient::stopRecording() { 445 LOG1("stopRecording (pid %d)", getCallingPid()); 446 Mutex::Autolock lock(mLock); 447 if (checkPidAndHardware() != NO_ERROR) return; 448 449 disableMsgType(CAMERA_MSG_VIDEO_FRAME); 450 mHardware->stopRecording(); 451 mCameraService->playSound(CameraService::SOUND_RECORDING); 452 453 mPreviewBuffer.clear(); 454} 455 456// release a recording frame 457void CameraClient::releaseRecordingFrame(const sp<IMemory>& mem) { 458 Mutex::Autolock lock(mLock); 459 if (checkPidAndHardware() != NO_ERROR) return; 460 mHardware->releaseRecordingFrame(mem); 461} 462 463status_t CameraClient::storeMetaDataInBuffers(bool enabled) 464{ 465 LOG1("storeMetaDataInBuffers: %s", enabled? "true": "false"); 466 Mutex::Autolock lock(mLock); 467 if (checkPidAndHardware() != NO_ERROR) { 468 return UNKNOWN_ERROR; 469 } 470 return mHardware->storeMetaDataInBuffers(enabled); 471} 472 473bool CameraClient::previewEnabled() { 474 LOG1("previewEnabled (pid %d)", getCallingPid()); 475 476 Mutex::Autolock lock(mLock); 477 if (checkPidAndHardware() != NO_ERROR) return false; 478 return mHardware->previewEnabled(); 479} 480 481bool CameraClient::recordingEnabled() { 482 LOG1("recordingEnabled (pid %d)", getCallingPid()); 483 484 Mutex::Autolock lock(mLock); 485 if (checkPidAndHardware() != NO_ERROR) return false; 486 return mHardware->recordingEnabled(); 487} 488 489status_t CameraClient::autoFocus() { 490 LOG1("autoFocus (pid %d)", getCallingPid()); 491 492 Mutex::Autolock lock(mLock); 493 status_t result = checkPidAndHardware(); 494 if (result != NO_ERROR) return result; 495 496 return mHardware->autoFocus(); 497} 498 499status_t CameraClient::cancelAutoFocus() { 500 LOG1("cancelAutoFocus (pid %d)", getCallingPid()); 501 502 Mutex::Autolock lock(mLock); 503 status_t result = checkPidAndHardware(); 504 if (result != NO_ERROR) return result; 505 506 return mHardware->cancelAutoFocus(); 507} 508 509// take a picture - image is returned in callback 510status_t CameraClient::takePicture(int msgType) { 511 LOG1("takePicture (pid %d): 0x%x", getCallingPid(), msgType); 512 513 Mutex::Autolock lock(mLock); 514 status_t result = checkPidAndHardware(); 515 if (result != NO_ERROR) return result; 516 517 if ((msgType & CAMERA_MSG_RAW_IMAGE) && 518 (msgType & CAMERA_MSG_RAW_IMAGE_NOTIFY)) { 519 ALOGE("CAMERA_MSG_RAW_IMAGE and CAMERA_MSG_RAW_IMAGE_NOTIFY" 520 " cannot be both enabled"); 521 return BAD_VALUE; 522 } 523 524 // We only accept picture related message types 525 // and ignore other types of messages for takePicture(). 526 int picMsgType = msgType 527 & (CAMERA_MSG_SHUTTER | 528 CAMERA_MSG_POSTVIEW_FRAME | 529 CAMERA_MSG_RAW_IMAGE | 530 CAMERA_MSG_RAW_IMAGE_NOTIFY | 531 CAMERA_MSG_COMPRESSED_IMAGE); 532 533 enableMsgType(picMsgType); 534 535 return mHardware->takePicture(); 536} 537 538// set preview/capture parameters - key/value pairs 539status_t CameraClient::setParameters(const String8& params) { 540 LOG1("setParameters (pid %d) (%s)", getCallingPid(), params.string()); 541 542 Mutex::Autolock lock(mLock); 543 status_t result = checkPidAndHardware(); 544 if (result != NO_ERROR) return result; 545 546 CameraParameters p(params); 547 return mHardware->setParameters(p); 548} 549 550// get preview/capture parameters - key/value pairs 551String8 CameraClient::getParameters() const { 552 Mutex::Autolock lock(mLock); 553 if (checkPidAndHardware() != NO_ERROR) return String8(); 554 555 String8 params(mHardware->getParameters().flatten()); 556 LOG1("getParameters (pid %d) (%s)", getCallingPid(), params.string()); 557 return params; 558} 559 560// enable shutter sound 561status_t CameraClient::enableShutterSound(bool enable) { 562 LOG1("enableShutterSound (pid %d)", getCallingPid()); 563 564 status_t result = checkPidAndHardware(); 565 if (result != NO_ERROR) return result; 566 567 if (enable) { 568 mPlayShutterSound = true; 569 return OK; 570 } 571 572 // Disabling shutter sound may not be allowed. In that case only 573 // allow the mediaserver process to disable the sound. 574 char value[PROPERTY_VALUE_MAX]; 575 property_get("ro.camera.sound.forced", value, "0"); 576 if (strcmp(value, "0") != 0) { 577 // Disabling shutter sound is not allowed. Deny if the current 578 // process is not mediaserver. 579 if (getCallingPid() != getpid()) { 580 ALOGE("Failed to disable shutter sound. Permission denied (pid %d)", getCallingPid()); 581 return PERMISSION_DENIED; 582 } 583 } 584 585 mPlayShutterSound = false; 586 return OK; 587} 588 589status_t CameraClient::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) { 590 LOG1("sendCommand (pid %d)", getCallingPid()); 591 int orientation; 592 Mutex::Autolock lock(mLock); 593 status_t result = checkPidAndHardware(); 594 if (result != NO_ERROR) return result; 595 596 if (cmd == CAMERA_CMD_SET_DISPLAY_ORIENTATION) { 597 // Mirror the preview if the camera is front-facing. 598 orientation = getOrientation(arg1, mCameraFacing == CAMERA_FACING_FRONT); 599 if (orientation == -1) return BAD_VALUE; 600 601 if (mOrientation != orientation) { 602 mOrientation = orientation; 603 if (mPreviewWindow != 0) { 604 native_window_set_buffers_transform(mPreviewWindow.get(), 605 mOrientation); 606 } 607 } 608 return OK; 609 } else if (cmd == CAMERA_CMD_ENABLE_SHUTTER_SOUND) { 610 switch (arg1) { 611 case 0: 612 return enableShutterSound(false); 613 case 1: 614 return enableShutterSound(true); 615 default: 616 return BAD_VALUE; 617 } 618 return OK; 619 } else if (cmd == CAMERA_CMD_PLAY_RECORDING_SOUND) { 620 mCameraService->playSound(CameraService::SOUND_RECORDING); 621 } else if (cmd == CAMERA_CMD_SET_VIDEO_BUFFER_COUNT) { 622 // Silently ignore this command 623 return INVALID_OPERATION; 624 } else if (cmd == CAMERA_CMD_PING) { 625 // If mHardware is 0, checkPidAndHardware will return error. 626 return OK; 627 } 628 629 return mHardware->sendCommand(cmd, arg1, arg2); 630} 631 632// ---------------------------------------------------------------------------- 633 634void CameraClient::enableMsgType(int32_t msgType) { 635 android_atomic_or(msgType, &mMsgEnabled); 636 mHardware->enableMsgType(msgType); 637} 638 639void CameraClient::disableMsgType(int32_t msgType) { 640 android_atomic_and(~msgType, &mMsgEnabled); 641 mHardware->disableMsgType(msgType); 642} 643 644#define CHECK_MESSAGE_INTERVAL 10 // 10ms 645bool CameraClient::lockIfMessageWanted(int32_t msgType) { 646 int sleepCount = 0; 647 while (mMsgEnabled & msgType) { 648 if (mLock.tryLock() == NO_ERROR) { 649 if (sleepCount > 0) { 650 LOG1("lockIfMessageWanted(%d): waited for %d ms", 651 msgType, sleepCount * CHECK_MESSAGE_INTERVAL); 652 } 653 return true; 654 } 655 if (sleepCount++ == 0) { 656 LOG1("lockIfMessageWanted(%d): enter sleep", msgType); 657 } 658 usleep(CHECK_MESSAGE_INTERVAL * 1000); 659 } 660 ALOGW("lockIfMessageWanted(%d): dropped unwanted message", msgType); 661 return false; 662} 663 664// Callback messages can be dispatched to internal handlers or pass to our 665// client's callback functions, depending on the message type. 666// 667// notifyCallback: 668// CAMERA_MSG_SHUTTER handleShutter 669// (others) c->notifyCallback 670// dataCallback: 671// CAMERA_MSG_PREVIEW_FRAME handlePreviewData 672// CAMERA_MSG_POSTVIEW_FRAME handlePostview 673// CAMERA_MSG_RAW_IMAGE handleRawPicture 674// CAMERA_MSG_COMPRESSED_IMAGE handleCompressedPicture 675// (others) c->dataCallback 676// dataCallbackTimestamp 677// (others) c->dataCallbackTimestamp 678// 679// NOTE: the *Callback functions grab mLock of the client before passing 680// control to handle* functions. So the handle* functions must release the 681// lock before calling the ICameraClient's callbacks, so those callbacks can 682// invoke methods in the Client class again (For example, the preview frame 683// callback may want to releaseRecordingFrame). The handle* functions must 684// release the lock after all accesses to member variables, so it must be 685// handled very carefully. 686 687void CameraClient::notifyCallback(int32_t msgType, int32_t ext1, 688 int32_t ext2, void* user) { 689 LOG2("notifyCallback(%d)", msgType); 690 691 Mutex* lock = getClientLockFromCookie(user); 692 if (lock == NULL) return; 693 Mutex::Autolock alock(*lock); 694 695 CameraClient* client = 696 static_cast<CameraClient*>(getClientFromCookie(user)); 697 if (client == NULL) return; 698 699 if (!client->lockIfMessageWanted(msgType)) return; 700 701 switch (msgType) { 702 case CAMERA_MSG_SHUTTER: 703 // ext1 is the dimension of the yuv picture. 704 client->handleShutter(); 705 break; 706 default: 707 client->handleGenericNotify(msgType, ext1, ext2); 708 break; 709 } 710} 711 712void CameraClient::dataCallback(int32_t msgType, 713 const sp<IMemory>& dataPtr, camera_frame_metadata_t *metadata, void* user) { 714 LOG2("dataCallback(%d)", msgType); 715 716 Mutex* lock = getClientLockFromCookie(user); 717 if (lock == NULL) return; 718 Mutex::Autolock alock(*lock); 719 720 CameraClient* client = 721 static_cast<CameraClient*>(getClientFromCookie(user)); 722 if (client == NULL) return; 723 724 if (!client->lockIfMessageWanted(msgType)) return; 725 if (dataPtr == 0 && metadata == NULL) { 726 ALOGE("Null data returned in data callback"); 727 client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); 728 return; 729 } 730 731 switch (msgType & ~CAMERA_MSG_PREVIEW_METADATA) { 732 case CAMERA_MSG_PREVIEW_FRAME: 733 client->handlePreviewData(msgType, dataPtr, metadata); 734 break; 735 case CAMERA_MSG_POSTVIEW_FRAME: 736 client->handlePostview(dataPtr); 737 break; 738 case CAMERA_MSG_RAW_IMAGE: 739 client->handleRawPicture(dataPtr); 740 break; 741 case CAMERA_MSG_COMPRESSED_IMAGE: 742 client->handleCompressedPicture(dataPtr); 743 break; 744 default: 745 client->handleGenericData(msgType, dataPtr, metadata); 746 break; 747 } 748} 749 750void CameraClient::dataCallbackTimestamp(nsecs_t timestamp, 751 int32_t msgType, const sp<IMemory>& dataPtr, void* user) { 752 LOG2("dataCallbackTimestamp(%d)", msgType); 753 754 Mutex* lock = getClientLockFromCookie(user); 755 if (lock == NULL) return; 756 Mutex::Autolock alock(*lock); 757 758 CameraClient* client = 759 static_cast<CameraClient*>(getClientFromCookie(user)); 760 if (client == NULL) return; 761 762 if (!client->lockIfMessageWanted(msgType)) return; 763 764 if (dataPtr == 0) { 765 ALOGE("Null data returned in data with timestamp callback"); 766 client->handleGenericNotify(CAMERA_MSG_ERROR, UNKNOWN_ERROR, 0); 767 return; 768 } 769 770 client->handleGenericDataTimestamp(timestamp, msgType, dataPtr); 771} 772 773// snapshot taken callback 774void CameraClient::handleShutter(void) { 775 if (mPlayShutterSound) { 776 mCameraService->playSound(CameraService::SOUND_SHUTTER); 777 } 778 779 sp<ICameraClient> c = mCameraClient; 780 if (c != 0) { 781 mLock.unlock(); 782 c->notifyCallback(CAMERA_MSG_SHUTTER, 0, 0); 783 if (!lockIfMessageWanted(CAMERA_MSG_SHUTTER)) return; 784 } 785 disableMsgType(CAMERA_MSG_SHUTTER); 786 787 mLock.unlock(); 788} 789 790// preview callback - frame buffer update 791void CameraClient::handlePreviewData(int32_t msgType, 792 const sp<IMemory>& mem, 793 camera_frame_metadata_t *metadata) { 794 ssize_t offset; 795 size_t size; 796 sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); 797 798 // local copy of the callback flags 799 int flags = mPreviewCallbackFlag; 800 801 // is callback enabled? 802 if (!(flags & CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK)) { 803 // If the enable bit is off, the copy-out and one-shot bits are ignored 804 LOG2("frame callback is disabled"); 805 mLock.unlock(); 806 return; 807 } 808 809 // hold a strong pointer to the client 810 sp<ICameraClient> c = mCameraClient; 811 812 // clear callback flags if no client or one-shot mode 813 if (c == 0 || (mPreviewCallbackFlag & CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK)) { 814 LOG2("Disable preview callback"); 815 mPreviewCallbackFlag &= ~(CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK | 816 CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK | 817 CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK); 818 disableMsgType(CAMERA_MSG_PREVIEW_FRAME); 819 } 820 821 if (c != 0) { 822 // Is the received frame copied out or not? 823 if (flags & CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK) { 824 LOG2("frame is copied"); 825 copyFrameAndPostCopiedFrame(msgType, c, heap, offset, size, metadata); 826 } else { 827 LOG2("frame is forwarded"); 828 mLock.unlock(); 829 c->dataCallback(msgType, mem, metadata); 830 } 831 } else { 832 mLock.unlock(); 833 } 834} 835 836// picture callback - postview image ready 837void CameraClient::handlePostview(const sp<IMemory>& mem) { 838 disableMsgType(CAMERA_MSG_POSTVIEW_FRAME); 839 840 sp<ICameraClient> c = mCameraClient; 841 mLock.unlock(); 842 if (c != 0) { 843 c->dataCallback(CAMERA_MSG_POSTVIEW_FRAME, mem, NULL); 844 } 845} 846 847// picture callback - raw image ready 848void CameraClient::handleRawPicture(const sp<IMemory>& mem) { 849 disableMsgType(CAMERA_MSG_RAW_IMAGE); 850 851 ssize_t offset; 852 size_t size; 853 sp<IMemoryHeap> heap = mem->getMemory(&offset, &size); 854 855 sp<ICameraClient> c = mCameraClient; 856 mLock.unlock(); 857 if (c != 0) { 858 c->dataCallback(CAMERA_MSG_RAW_IMAGE, mem, NULL); 859 } 860} 861 862// picture callback - compressed picture ready 863void CameraClient::handleCompressedPicture(const sp<IMemory>& mem) { 864 disableMsgType(CAMERA_MSG_COMPRESSED_IMAGE); 865 866 sp<ICameraClient> c = mCameraClient; 867 mLock.unlock(); 868 if (c != 0) { 869 c->dataCallback(CAMERA_MSG_COMPRESSED_IMAGE, mem, NULL); 870 } 871} 872 873 874void CameraClient::handleGenericNotify(int32_t msgType, 875 int32_t ext1, int32_t ext2) { 876 sp<ICameraClient> c = mCameraClient; 877 mLock.unlock(); 878 if (c != 0) { 879 c->notifyCallback(msgType, ext1, ext2); 880 } 881} 882 883void CameraClient::handleGenericData(int32_t msgType, 884 const sp<IMemory>& dataPtr, camera_frame_metadata_t *metadata) { 885 sp<ICameraClient> c = mCameraClient; 886 mLock.unlock(); 887 if (c != 0) { 888 c->dataCallback(msgType, dataPtr, metadata); 889 } 890} 891 892void CameraClient::handleGenericDataTimestamp(nsecs_t timestamp, 893 int32_t msgType, const sp<IMemory>& dataPtr) { 894 sp<ICameraClient> c = mCameraClient; 895 mLock.unlock(); 896 if (c != 0) { 897 c->dataCallbackTimestamp(timestamp, msgType, dataPtr); 898 } 899} 900 901void CameraClient::copyFrameAndPostCopiedFrame( 902 int32_t msgType, const sp<ICameraClient>& client, 903 const sp<IMemoryHeap>& heap, size_t offset, size_t size, 904 camera_frame_metadata_t *metadata) { 905 LOG2("copyFrameAndPostCopiedFrame"); 906 // It is necessary to copy out of pmem before sending this to 907 // the callback. For efficiency, reuse the same MemoryHeapBase 908 // provided it's big enough. Don't allocate the memory or 909 // perform the copy if there's no callback. 910 // hold the preview lock while we grab a reference to the preview buffer 911 sp<MemoryHeapBase> previewBuffer; 912 913 if (mPreviewBuffer == 0) { 914 mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); 915 } else if (size > mPreviewBuffer->virtualSize()) { 916 mPreviewBuffer.clear(); 917 mPreviewBuffer = new MemoryHeapBase(size, 0, NULL); 918 } 919 if (mPreviewBuffer == 0) { 920 ALOGE("failed to allocate space for preview buffer"); 921 mLock.unlock(); 922 return; 923 } 924 previewBuffer = mPreviewBuffer; 925 926 memcpy(previewBuffer->base(), (uint8_t *)heap->base() + offset, size); 927 928 sp<MemoryBase> frame = new MemoryBase(previewBuffer, 0, size); 929 if (frame == 0) { 930 ALOGE("failed to allocate space for frame callback"); 931 mLock.unlock(); 932 return; 933 } 934 935 mLock.unlock(); 936 client->dataCallback(msgType, frame, metadata); 937} 938 939int CameraClient::getOrientation(int degrees, bool mirror) { 940 if (!mirror) { 941 if (degrees == 0) return 0; 942 else if (degrees == 90) return HAL_TRANSFORM_ROT_90; 943 else if (degrees == 180) return HAL_TRANSFORM_ROT_180; 944 else if (degrees == 270) return HAL_TRANSFORM_ROT_270; 945 } else { // Do mirror (horizontal flip) 946 if (degrees == 0) { // FLIP_H and ROT_0 947 return HAL_TRANSFORM_FLIP_H; 948 } else if (degrees == 90) { // FLIP_H and ROT_90 949 return HAL_TRANSFORM_FLIP_H | HAL_TRANSFORM_ROT_90; 950 } else if (degrees == 180) { // FLIP_H and ROT_180 951 return HAL_TRANSFORM_FLIP_V; 952 } else if (degrees == 270) { // FLIP_H and ROT_270 953 return HAL_TRANSFORM_FLIP_V | HAL_TRANSFORM_ROT_90; 954 } 955 } 956 ALOGE("Invalid setDisplayOrientation degrees=%d", degrees); 957 return -1; 958} 959 960}; // namespace android 961