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 "ProCamera2Client" 18 #define ATRACE_TAG ATRACE_TAG_CAMERA 19 //#define LOG_NDEBUG 0 20 21 #include <utils/Log.h> 22 #include <utils/Trace.h> 23 24 #include <cutils/properties.h> 25 #include <gui/Surface.h> 26 #include <gui/Surface.h> 27 28 #include "api_pro/ProCamera2Client.h" 29 #include "common/CameraDeviceBase.h" 30 31 namespace android { 32 using namespace camera2; 33 34 // Interface used by CameraService 35 36 ProCamera2Client::ProCamera2Client(const sp<CameraService>& cameraService, 37 const sp<IProCameraCallbacks>& remoteCallback, 38 const String16& clientPackageName, 39 int cameraId, 40 int cameraFacing, 41 int clientPid, 42 uid_t clientUid, 43 int servicePid) : 44 Camera2ClientBase(cameraService, remoteCallback, clientPackageName, 45 cameraId, cameraFacing, clientPid, clientUid, servicePid) 46 { 47 ATRACE_CALL(); 48 ALOGI("ProCamera %d: Opened", cameraId); 49 50 mExclusiveLock = false; 51 } 52 53 status_t ProCamera2Client::initialize(camera_module_t *module) 54 { 55 ATRACE_CALL(); 56 status_t res; 57 58 res = Camera2ClientBase::initialize(module); 59 if (res != OK) { 60 return res; 61 } 62 63 String8 threadName; 64 mFrameProcessor = new FrameProcessorBase(mDevice); 65 threadName = String8::format("PC2-%d-FrameProc", mCameraId); 66 mFrameProcessor->run(threadName.string()); 67 68 mFrameProcessor->registerListener(FRAME_PROCESSOR_LISTENER_MIN_ID, 69 FRAME_PROCESSOR_LISTENER_MAX_ID, 70 /*listener*/this); 71 72 return OK; 73 } 74 75 ProCamera2Client::~ProCamera2Client() { 76 } 77 78 status_t ProCamera2Client::exclusiveTryLock() { 79 ATRACE_CALL(); 80 ALOGV("%s", __FUNCTION__); 81 82 Mutex::Autolock icl(mBinderSerializationLock); 83 SharedCameraCallbacks::Lock l(mSharedCameraCallbacks); 84 85 if (!mDevice.get()) return PERMISSION_DENIED; 86 87 if (!mExclusiveLock) { 88 mExclusiveLock = true; 89 90 if (mRemoteCallback != NULL) { 91 mRemoteCallback->onLockStatusChanged( 92 IProCameraCallbacks::LOCK_ACQUIRED); 93 } 94 95 ALOGV("%s: exclusive lock acquired", __FUNCTION__); 96 97 return OK; 98 } 99 100 // TODO: have a PERMISSION_DENIED case for when someone else owns the lock 101 102 // don't allow recursive locking 103 ALOGW("%s: exclusive lock already exists - recursive locking is not" 104 "allowed", __FUNCTION__); 105 106 return ALREADY_EXISTS; 107 } 108 109 status_t ProCamera2Client::exclusiveLock() { 110 ATRACE_CALL(); 111 ALOGV("%s", __FUNCTION__); 112 113 Mutex::Autolock icl(mBinderSerializationLock); 114 SharedCameraCallbacks::Lock l(mSharedCameraCallbacks); 115 116 if (!mDevice.get()) return PERMISSION_DENIED; 117 118 /** 119 * TODO: this should asynchronously 'wait' until the lock becomes available 120 * if another client already has an exclusive lock. 121 * 122 * once we have proper sharing support this will need to do 123 * more than just return immediately 124 */ 125 if (!mExclusiveLock) { 126 mExclusiveLock = true; 127 128 if (mRemoteCallback != NULL) { 129 mRemoteCallback->onLockStatusChanged(IProCameraCallbacks::LOCK_ACQUIRED); 130 } 131 132 ALOGV("%s: exclusive lock acquired", __FUNCTION__); 133 134 return OK; 135 } 136 137 // don't allow recursive locking 138 ALOGW("%s: exclusive lock already exists - recursive locking is not allowed" 139 , __FUNCTION__); 140 return ALREADY_EXISTS; 141 } 142 143 status_t ProCamera2Client::exclusiveUnlock() { 144 ATRACE_CALL(); 145 ALOGV("%s", __FUNCTION__); 146 147 Mutex::Autolock icl(mBinderSerializationLock); 148 SharedCameraCallbacks::Lock l(mSharedCameraCallbacks); 149 150 // don't allow unlocking if we have no lock 151 if (!mExclusiveLock) { 152 ALOGW("%s: cannot unlock, no lock was held in the first place", 153 __FUNCTION__); 154 return BAD_VALUE; 155 } 156 157 mExclusiveLock = false; 158 if (mRemoteCallback != NULL ) { 159 mRemoteCallback->onLockStatusChanged( 160 IProCameraCallbacks::LOCK_RELEASED); 161 } 162 ALOGV("%s: exclusive lock released", __FUNCTION__); 163 164 return OK; 165 } 166 167 bool ProCamera2Client::hasExclusiveLock() { 168 Mutex::Autolock icl(mBinderSerializationLock); 169 return mExclusiveLock; 170 } 171 172 void ProCamera2Client::onExclusiveLockStolen() { 173 ALOGV("%s: ProClient lost exclusivity (id %d)", 174 __FUNCTION__, mCameraId); 175 176 Mutex::Autolock icl(mBinderSerializationLock); 177 SharedCameraCallbacks::Lock l(mSharedCameraCallbacks); 178 179 if (mExclusiveLock && mRemoteCallback.get() != NULL) { 180 mRemoteCallback->onLockStatusChanged( 181 IProCameraCallbacks::LOCK_STOLEN); 182 } 183 184 mExclusiveLock = false; 185 186 //TODO: we should not need to detach the device, merely reset it. 187 detachDevice(); 188 } 189 190 status_t ProCamera2Client::submitRequest(camera_metadata_t* request, 191 bool streaming) { 192 ATRACE_CALL(); 193 ALOGV("%s", __FUNCTION__); 194 195 Mutex::Autolock icl(mBinderSerializationLock); 196 197 if (!mDevice.get()) return DEAD_OBJECT; 198 199 if (!mExclusiveLock) { 200 return PERMISSION_DENIED; 201 } 202 203 CameraMetadata metadata(request); 204 205 if (!enforceRequestPermissions(metadata)) { 206 return PERMISSION_DENIED; 207 } 208 209 if (streaming) { 210 return mDevice->setStreamingRequest(metadata); 211 } else { 212 return mDevice->capture(metadata); 213 } 214 215 // unreachable. thx gcc for a useless warning 216 return OK; 217 } 218 219 status_t ProCamera2Client::cancelRequest(int requestId) { 220 (void)requestId; 221 ATRACE_CALL(); 222 ALOGV("%s", __FUNCTION__); 223 224 Mutex::Autolock icl(mBinderSerializationLock); 225 226 if (!mDevice.get()) return DEAD_OBJECT; 227 228 if (!mExclusiveLock) { 229 return PERMISSION_DENIED; 230 } 231 232 // TODO: implement 233 ALOGE("%s: not fully implemented yet", __FUNCTION__); 234 return INVALID_OPERATION; 235 } 236 237 status_t ProCamera2Client::deleteStream(int streamId) { 238 ATRACE_CALL(); 239 ALOGV("%s (streamId = 0x%x)", __FUNCTION__, streamId); 240 241 status_t res; 242 if ( (res = checkPid(__FUNCTION__) ) != OK) return res; 243 244 Mutex::Autolock icl(mBinderSerializationLock); 245 246 if (!mDevice.get()) return DEAD_OBJECT; 247 mDevice->clearStreamingRequest(); 248 249 status_t code; 250 if ((code = mDevice->waitUntilDrained()) != OK) { 251 ALOGE("%s: waitUntilDrained failed with code 0x%x", __FUNCTION__, code); 252 } 253 254 return mDevice->deleteStream(streamId); 255 } 256 257 status_t ProCamera2Client::createStream(int width, int height, int format, 258 const sp<IGraphicBufferProducer>& bufferProducer, 259 /*out*/ 260 int* streamId) 261 { 262 if (streamId) { 263 *streamId = -1; 264 } 265 266 ATRACE_CALL(); 267 ALOGV("%s (w = %d, h = %d, f = 0x%x)", __FUNCTION__, width, height, format); 268 269 status_t res; 270 if ( (res = checkPid(__FUNCTION__) ) != OK) return res; 271 272 Mutex::Autolock icl(mBinderSerializationLock); 273 274 if (!mDevice.get()) return DEAD_OBJECT; 275 276 sp<IBinder> binder; 277 sp<ANativeWindow> window; 278 if (bufferProducer != 0) { 279 binder = bufferProducer->asBinder(); 280 window = new Surface(bufferProducer); 281 } 282 283 return mDevice->createStream(window, width, height, format, /*size*/1, 284 streamId); 285 } 286 287 // Create a request object from a template. 288 // -- Caller owns the newly allocated metadata 289 status_t ProCamera2Client::createDefaultRequest(int templateId, 290 /*out*/ 291 camera_metadata** request) 292 { 293 ATRACE_CALL(); 294 ALOGV("%s (templateId = 0x%x)", __FUNCTION__, templateId); 295 296 if (request) { 297 *request = NULL; 298 } 299 300 status_t res; 301 if ( (res = checkPid(__FUNCTION__) ) != OK) return res; 302 303 Mutex::Autolock icl(mBinderSerializationLock); 304 305 if (!mDevice.get()) return DEAD_OBJECT; 306 307 CameraMetadata metadata; 308 if ( (res = mDevice->createDefaultRequest(templateId, &metadata) ) == OK) { 309 *request = metadata.release(); 310 } 311 312 return res; 313 } 314 315 status_t ProCamera2Client::getCameraInfo(int cameraId, 316 /*out*/ 317 camera_metadata** info) 318 { 319 if (cameraId != mCameraId) { 320 return INVALID_OPERATION; 321 } 322 323 Mutex::Autolock icl(mBinderSerializationLock); 324 325 if (!mDevice.get()) return DEAD_OBJECT; 326 327 CameraMetadata deviceInfo = mDevice->info(); 328 *info = deviceInfo.release(); 329 330 return OK; 331 } 332 333 status_t ProCamera2Client::dump(int fd, const Vector<String16>& args) { 334 String8 result; 335 result.appendFormat("ProCamera2Client[%d] (%p) PID: %d, dump:\n", 336 mCameraId, 337 getRemoteCallback()->asBinder().get(), 338 mClientPid); 339 result.append(" State: "); 340 341 // TODO: print dynamic/request section from most recent requests 342 mFrameProcessor->dump(fd, args); 343 344 return dumpDevice(fd, args); 345 } 346 347 // IProCameraUser interface 348 349 void ProCamera2Client::detachDevice() { 350 if (mDevice == 0) return; 351 352 ALOGV("Camera %d: Stopping processors", mCameraId); 353 354 mFrameProcessor->removeListener(FRAME_PROCESSOR_LISTENER_MIN_ID, 355 FRAME_PROCESSOR_LISTENER_MAX_ID, 356 /*listener*/this); 357 mFrameProcessor->requestExit(); 358 ALOGV("Camera %d: Waiting for threads", mCameraId); 359 mFrameProcessor->join(); 360 ALOGV("Camera %d: Disconnecting device", mCameraId); 361 362 // WORKAROUND: HAL refuses to disconnect while there's streams in flight 363 { 364 mDevice->clearStreamingRequest(); 365 366 status_t code; 367 if ((code = mDevice->waitUntilDrained()) != OK) { 368 ALOGE("%s: waitUntilDrained failed with code 0x%x", __FUNCTION__, 369 code); 370 } 371 } 372 373 Camera2ClientBase::detachDevice(); 374 } 375 376 /** Device-related methods */ 377 void ProCamera2Client::onFrameAvailable(int32_t requestId, 378 const CameraMetadata& frame) { 379 ATRACE_CALL(); 380 ALOGV("%s", __FUNCTION__); 381 382 Mutex::Autolock icl(mBinderSerializationLock); 383 SharedCameraCallbacks::Lock l(mSharedCameraCallbacks); 384 385 if (mRemoteCallback != NULL) { 386 CameraMetadata tmp(frame); 387 camera_metadata_t* meta = tmp.release(); 388 ALOGV("%s: meta = %p ", __FUNCTION__, meta); 389 mRemoteCallback->onResultReceived(requestId, meta); 390 tmp.acquire(meta); 391 } 392 393 } 394 395 bool ProCamera2Client::enforceRequestPermissions(CameraMetadata& metadata) { 396 397 const int pid = IPCThreadState::self()->getCallingPid(); 398 const int selfPid = getpid(); 399 camera_metadata_entry_t entry; 400 401 /** 402 * Mixin default important security values 403 * - android.led.transmit = defaulted ON 404 */ 405 CameraMetadata staticInfo = mDevice->info(); 406 entry = staticInfo.find(ANDROID_LED_AVAILABLE_LEDS); 407 for(size_t i = 0; i < entry.count; ++i) { 408 uint8_t led = entry.data.u8[i]; 409 410 switch(led) { 411 case ANDROID_LED_AVAILABLE_LEDS_TRANSMIT: { 412 uint8_t transmitDefault = ANDROID_LED_TRANSMIT_ON; 413 if (!metadata.exists(ANDROID_LED_TRANSMIT)) { 414 metadata.update(ANDROID_LED_TRANSMIT, 415 &transmitDefault, 1); 416 } 417 break; 418 } 419 } 420 } 421 422 // We can do anything! 423 if (pid == selfPid) { 424 return true; 425 } 426 427 /** 428 * Permission check special fields in the request 429 * - android.led.transmit = android.permission.CAMERA_DISABLE_TRANSMIT 430 */ 431 entry = metadata.find(ANDROID_LED_TRANSMIT); 432 if (entry.count > 0 && entry.data.u8[0] != ANDROID_LED_TRANSMIT_ON) { 433 String16 permissionString = 434 String16("android.permission.CAMERA_DISABLE_TRANSMIT_LED"); 435 if (!checkCallingPermission(permissionString)) { 436 const int uid = IPCThreadState::self()->getCallingUid(); 437 ALOGE("Permission Denial: " 438 "can't disable transmit LED pid=%d, uid=%d", pid, uid); 439 return false; 440 } 441 } 442 443 return true; 444 } 445 446 } // namespace android 447
