1 /*
2 * Copyright (C) 2010 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 #include <sensor/Sensor.h>
18
19 #include <inttypes.h>
20
21 #include <binder/AppOpsManager.h>
22 #include <binder/IPermissionController.h>
23 #include <binder/IServiceManager.h>
24
25 // ----------------------------------------------------------------------------
26 namespace android {
27 // ----------------------------------------------------------------------------
28
Sensor(const char * name)29 Sensor::Sensor(const char * name) :
30 mName(name), mHandle(0), mType(0),
31 mMinValue(0), mMaxValue(0), mResolution(0),
32 mPower(0), mMinDelay(0), mVersion(0), mFifoReservedEventCount(0),
33 mFifoMaxEventCount(0), mRequiredAppOp(0),
34 mMaxDelay(0), mFlags(0) {
35 }
36
Sensor(struct sensor_t const * hwSensor,int halVersion)37 Sensor::Sensor(struct sensor_t const* hwSensor, int halVersion) :
38 Sensor(*hwSensor, uuid_t(), halVersion) {
39 }
40
Sensor(struct sensor_t const & hwSensor,const uuid_t & uuid,int halVersion)41 Sensor::Sensor(struct sensor_t const& hwSensor, const uuid_t& uuid, int halVersion) {
42 mName = hwSensor.name;
43 mVendor = hwSensor.vendor;
44 mVersion = hwSensor.version;
45 mHandle = hwSensor.handle;
46 mType = hwSensor.type;
47 mMinValue = 0; // FIXME: minValue
48 mMaxValue = hwSensor.maxRange; // FIXME: maxValue
49 mResolution = hwSensor.resolution;
50 mPower = hwSensor.power;
51 mMinDelay = hwSensor.minDelay;
52 mFlags = 0;
53 mUuid = uuid;
54
55 // Set fifo event count zero for older devices which do not support batching. Fused
56 // sensors also have their fifo counts set to zero.
57 if (halVersion > SENSORS_DEVICE_API_VERSION_1_0) {
58 mFifoReservedEventCount = hwSensor.fifoReservedEventCount;
59 mFifoMaxEventCount = hwSensor.fifoMaxEventCount;
60 } else {
61 mFifoReservedEventCount = 0;
62 mFifoMaxEventCount = 0;
63 }
64
65 if (halVersion >= SENSORS_DEVICE_API_VERSION_1_3) {
66 if (hwSensor.maxDelay > INT_MAX) {
67 // Max delay is declared as a 64 bit integer for 64 bit architectures. But it should
68 // always fit in a 32 bit integer, log error and cap it to INT_MAX.
69 ALOGE("Sensor maxDelay overflow error %s %" PRId64, mName.string(),
70 static_cast<int64_t>(hwSensor.maxDelay));
71 mMaxDelay = INT_MAX;
72 } else {
73 mMaxDelay = static_cast<int32_t>(hwSensor.maxDelay);
74 }
75 } else {
76 // For older hals set maxDelay to 0.
77 mMaxDelay = 0;
78 }
79
80 // Ensure existing sensors have correct string type, required permissions and reporting mode.
81 // Set reportingMode for all android defined sensor types, set wake-up flag only for proximity
82 // sensor, significant motion, tilt, pick_up gesture, wake gesture and glance gesture on older
83 // HALs. Newer HALs can define both wake-up and non wake-up proximity sensors.
84 // All the OEM defined defined sensors have flags set to whatever is provided by the HAL.
85 switch (mType) {
86 case SENSOR_TYPE_ACCELEROMETER:
87 mStringType = SENSOR_STRING_TYPE_ACCELEROMETER;
88 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
89 break;
90 case SENSOR_TYPE_AMBIENT_TEMPERATURE:
91 mStringType = SENSOR_STRING_TYPE_AMBIENT_TEMPERATURE;
92 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
93 break;
94 case SENSOR_TYPE_GAME_ROTATION_VECTOR:
95 mStringType = SENSOR_STRING_TYPE_GAME_ROTATION_VECTOR;
96 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
97 break;
98 case SENSOR_TYPE_GEOMAGNETIC_ROTATION_VECTOR:
99 mStringType = SENSOR_STRING_TYPE_GEOMAGNETIC_ROTATION_VECTOR;
100 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
101 break;
102 case SENSOR_TYPE_GRAVITY:
103 mStringType = SENSOR_STRING_TYPE_GRAVITY;
104 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
105 break;
106 case SENSOR_TYPE_GYROSCOPE:
107 mStringType = SENSOR_STRING_TYPE_GYROSCOPE;
108 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
109 break;
110 case SENSOR_TYPE_GYROSCOPE_UNCALIBRATED:
111 mStringType = SENSOR_STRING_TYPE_GYROSCOPE_UNCALIBRATED;
112 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
113 break;
114 case SENSOR_TYPE_HEART_RATE: {
115 mStringType = SENSOR_STRING_TYPE_HEART_RATE;
116 mRequiredPermission = SENSOR_PERMISSION_BODY_SENSORS;
117 AppOpsManager appOps;
118 mRequiredAppOp = appOps.permissionToOpCode(String16(SENSOR_PERMISSION_BODY_SENSORS));
119 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
120 } break;
121 case SENSOR_TYPE_LIGHT:
122 mStringType = SENSOR_STRING_TYPE_LIGHT;
123 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
124 break;
125 case SENSOR_TYPE_LINEAR_ACCELERATION:
126 mStringType = SENSOR_STRING_TYPE_LINEAR_ACCELERATION;
127 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
128 break;
129 case SENSOR_TYPE_MAGNETIC_FIELD:
130 mStringType = SENSOR_STRING_TYPE_MAGNETIC_FIELD;
131 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
132 break;
133 case SENSOR_TYPE_MAGNETIC_FIELD_UNCALIBRATED:
134 mStringType = SENSOR_STRING_TYPE_MAGNETIC_FIELD_UNCALIBRATED;
135 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
136 break;
137 case SENSOR_TYPE_ORIENTATION:
138 mStringType = SENSOR_STRING_TYPE_ORIENTATION;
139 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
140 break;
141 case SENSOR_TYPE_PRESSURE:
142 mStringType = SENSOR_STRING_TYPE_PRESSURE;
143 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
144 break;
145 case SENSOR_TYPE_PROXIMITY:
146 mStringType = SENSOR_STRING_TYPE_PROXIMITY;
147 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
148 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) {
149 mFlags |= SENSOR_FLAG_WAKE_UP;
150 }
151 break;
152 case SENSOR_TYPE_RELATIVE_HUMIDITY:
153 mStringType = SENSOR_STRING_TYPE_RELATIVE_HUMIDITY;
154 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
155 break;
156 case SENSOR_TYPE_ROTATION_VECTOR:
157 mStringType = SENSOR_STRING_TYPE_ROTATION_VECTOR;
158 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
159 break;
160 case SENSOR_TYPE_SIGNIFICANT_MOTION:
161 mStringType = SENSOR_STRING_TYPE_SIGNIFICANT_MOTION;
162 mFlags |= SENSOR_FLAG_ONE_SHOT_MODE;
163 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) {
164 mFlags |= SENSOR_FLAG_WAKE_UP;
165 }
166 break;
167 case SENSOR_TYPE_STEP_COUNTER:
168 mStringType = SENSOR_STRING_TYPE_STEP_COUNTER;
169 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
170 break;
171 case SENSOR_TYPE_STEP_DETECTOR:
172 mStringType = SENSOR_STRING_TYPE_STEP_DETECTOR;
173 mFlags |= SENSOR_FLAG_SPECIAL_REPORTING_MODE;
174 break;
175 case SENSOR_TYPE_TEMPERATURE:
176 mStringType = SENSOR_STRING_TYPE_TEMPERATURE;
177 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
178 break;
179 case SENSOR_TYPE_TILT_DETECTOR:
180 mStringType = SENSOR_STRING_TYPE_TILT_DETECTOR;
181 mFlags |= SENSOR_FLAG_SPECIAL_REPORTING_MODE;
182 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) {
183 mFlags |= SENSOR_FLAG_WAKE_UP;
184 }
185 break;
186 case SENSOR_TYPE_WAKE_GESTURE:
187 mStringType = SENSOR_STRING_TYPE_WAKE_GESTURE;
188 mFlags |= SENSOR_FLAG_ONE_SHOT_MODE;
189 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) {
190 mFlags |= SENSOR_FLAG_WAKE_UP;
191 }
192 break;
193 case SENSOR_TYPE_GLANCE_GESTURE:
194 mStringType = SENSOR_STRING_TYPE_GLANCE_GESTURE;
195 mFlags |= SENSOR_FLAG_ONE_SHOT_MODE;
196 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) {
197 mFlags |= SENSOR_FLAG_WAKE_UP;
198 }
199 break;
200 case SENSOR_TYPE_PICK_UP_GESTURE:
201 mStringType = SENSOR_STRING_TYPE_PICK_UP_GESTURE;
202 mFlags |= SENSOR_FLAG_ONE_SHOT_MODE;
203 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) {
204 mFlags |= SENSOR_FLAG_WAKE_UP;
205 }
206 break;
207 case SENSOR_TYPE_LOW_LATENCY_OFFBODY_DETECT:
208 mStringType = SENSOR_STRING_TYPE_LOW_LATENCY_OFFBODY_DETECT;
209 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
210 break;
211 case SENSOR_TYPE_WRIST_TILT_GESTURE:
212 mStringType = SENSOR_STRING_TYPE_WRIST_TILT_GESTURE;
213 mFlags |= SENSOR_FLAG_SPECIAL_REPORTING_MODE;
214 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) {
215 mFlags |= SENSOR_FLAG_WAKE_UP;
216 }
217 break;
218 case SENSOR_TYPE_DYNAMIC_SENSOR_META:
219 mStringType = SENSOR_STRING_TYPE_DYNAMIC_SENSOR_META;
220 mFlags |= SENSOR_FLAG_SPECIAL_REPORTING_MODE; // special trigger
221 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) {
222 mFlags |= SENSOR_FLAG_WAKE_UP;
223 }
224 break;
225 case SENSOR_TYPE_POSE_6DOF:
226 mStringType = SENSOR_STRING_TYPE_POSE_6DOF;
227 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
228 break;
229 case SENSOR_TYPE_STATIONARY_DETECT:
230 mStringType = SENSOR_STRING_TYPE_STATIONARY_DETECT;
231 mFlags |= SENSOR_FLAG_ONE_SHOT_MODE;
232 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) {
233 mFlags |= SENSOR_FLAG_WAKE_UP;
234 }
235 break;
236 case SENSOR_TYPE_MOTION_DETECT:
237 mStringType = SENSOR_STRING_TYPE_MOTION_DETECT;
238 mFlags |= SENSOR_FLAG_ONE_SHOT_MODE;
239 if (halVersion < SENSORS_DEVICE_API_VERSION_1_3) {
240 mFlags |= SENSOR_FLAG_WAKE_UP;
241 }
242 break;
243 case SENSOR_TYPE_HEART_BEAT:
244 mStringType = SENSOR_STRING_TYPE_HEART_BEAT;
245 mFlags |= SENSOR_FLAG_SPECIAL_REPORTING_MODE;
246 break;
247
248 // TODO: Placeholder for LLOB sensor type
249
250
251 case SENSOR_TYPE_ACCELEROMETER_UNCALIBRATED:
252 mStringType = SENSOR_STRING_TYPE_ACCELEROMETER_UNCALIBRATED;
253 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
254 break;
255 default:
256 // Only pipe the stringType, requiredPermission and flags for custom sensors.
257 if (halVersion > SENSORS_DEVICE_API_VERSION_1_0 && hwSensor.stringType) {
258 mStringType = hwSensor.stringType;
259 }
260 if (halVersion > SENSORS_DEVICE_API_VERSION_1_0 && hwSensor.requiredPermission) {
261 mRequiredPermission = hwSensor.requiredPermission;
262 if (!strcmp(mRequiredPermission, SENSOR_PERMISSION_BODY_SENSORS)) {
263 AppOpsManager appOps;
264 mRequiredAppOp = appOps.permissionToOpCode(String16(SENSOR_PERMISSION_BODY_SENSORS));
265 }
266 }
267
268 if (halVersion >= SENSORS_DEVICE_API_VERSION_1_3) {
269 mFlags = static_cast<uint32_t>(hwSensor.flags);
270 } else {
271 // This is an OEM defined sensor on an older HAL. Use minDelay to determine the
272 // reporting mode of the sensor.
273 if (mMinDelay > 0) {
274 mFlags |= SENSOR_FLAG_CONTINUOUS_MODE;
275 } else if (mMinDelay == 0) {
276 mFlags |= SENSOR_FLAG_ON_CHANGE_MODE;
277 } else if (mMinDelay < 0) {
278 mFlags |= SENSOR_FLAG_ONE_SHOT_MODE;
279 }
280 }
281 break;
282 }
283
284 if (halVersion >= SENSORS_DEVICE_API_VERSION_1_3) {
285 // Wake-up flag of HAL 1.3 and above is set here
286 mFlags |= (hwSensor.flags & SENSOR_FLAG_WAKE_UP);
287
288 // Log error if the reporting mode is not as expected, but respect HAL setting.
289 int actualReportingMode = (hwSensor.flags & REPORTING_MODE_MASK) >> REPORTING_MODE_SHIFT;
290 int expectedReportingMode = (mFlags & REPORTING_MODE_MASK) >> REPORTING_MODE_SHIFT;
291 if (actualReportingMode != expectedReportingMode) {
292 ALOGE("Reporting Mode incorrect: sensor %s handle=%#010" PRIx32 " type=%" PRId32 " "
293 "actual=%d expected=%d",
294 mName.string(), mHandle, mType, actualReportingMode, expectedReportingMode);
295 }
296 }
297
298 // Feature flags
299 // Set DYNAMIC_SENSOR_MASK and ADDITIONAL_INFO_MASK flag here. Compatible with HAL 1_3.
300 if (halVersion >= SENSORS_DEVICE_API_VERSION_1_3) {
301 mFlags |= hwSensor.flags & (DYNAMIC_SENSOR_MASK | ADDITIONAL_INFO_MASK);
302 }
303 // Set DIRECT_REPORT_MASK and DIRECT_CHANNEL_MASK flags. Compatible with HAL 1_3.
304 if (halVersion >= SENSORS_DEVICE_API_VERSION_1_3) {
305 // only on continuous sensors direct report mode is defined
306 if ((mFlags & REPORTING_MODE_MASK) == SENSOR_FLAG_CONTINUOUS_MODE) {
307 mFlags |= hwSensor.flags
308 & (SENSOR_FLAG_MASK_DIRECT_REPORT | SENSOR_FLAG_MASK_DIRECT_CHANNEL);
309 }
310 }
311 // Set DATA_INJECTION flag here. Defined in HAL 1_4.
312 if (halVersion >= SENSORS_DEVICE_API_VERSION_1_4) {
313 mFlags |= (hwSensor.flags & DATA_INJECTION_MASK);
314 }
315
316 if (mRequiredPermission.length() > 0) {
317 // If the sensor is protected by a permission we need to know if it is
318 // a runtime one to determine whether we can use the permission cache.
319 sp<IBinder> binder = defaultServiceManager()->getService(String16("permission"));
320 if (binder != 0) {
321 sp<IPermissionController> permCtrl = interface_cast<IPermissionController>(binder);
322 mRequiredPermissionRuntime = permCtrl->isRuntimePermission(
323 String16(mRequiredPermission));
324 }
325 }
326 }
327
~Sensor()328 Sensor::~Sensor() {
329 }
330
getName() const331 const String8& Sensor::getName() const {
332 return mName;
333 }
334
getVendor() const335 const String8& Sensor::getVendor() const {
336 return mVendor;
337 }
338
getHandle() const339 int32_t Sensor::getHandle() const {
340 return mHandle;
341 }
342
getType() const343 int32_t Sensor::getType() const {
344 return mType;
345 }
346
getMinValue() const347 float Sensor::getMinValue() const {
348 return mMinValue;
349 }
350
getMaxValue() const351 float Sensor::getMaxValue() const {
352 return mMaxValue;
353 }
354
getResolution() const355 float Sensor::getResolution() const {
356 return mResolution;
357 }
358
getPowerUsage() const359 float Sensor::getPowerUsage() const {
360 return mPower;
361 }
362
getMinDelay() const363 int32_t Sensor::getMinDelay() const {
364 return mMinDelay;
365 }
366
getMinDelayNs() const367 nsecs_t Sensor::getMinDelayNs() const {
368 return getMinDelay() * 1000;
369 }
370
getVersion() const371 int32_t Sensor::getVersion() const {
372 return mVersion;
373 }
374
getFifoReservedEventCount() const375 uint32_t Sensor::getFifoReservedEventCount() const {
376 return mFifoReservedEventCount;
377 }
378
getFifoMaxEventCount() const379 uint32_t Sensor::getFifoMaxEventCount() const {
380 return mFifoMaxEventCount;
381 }
382
getStringType() const383 const String8& Sensor::getStringType() const {
384 return mStringType;
385 }
386
getRequiredPermission() const387 const String8& Sensor::getRequiredPermission() const {
388 return mRequiredPermission;
389 }
390
isRequiredPermissionRuntime() const391 bool Sensor::isRequiredPermissionRuntime() const {
392 return mRequiredPermissionRuntime;
393 }
394
getRequiredAppOp() const395 int32_t Sensor::getRequiredAppOp() const {
396 return mRequiredAppOp;
397 }
398
getMaxDelay() const399 int32_t Sensor::getMaxDelay() const {
400 return mMaxDelay;
401 }
402
getFlags() const403 uint32_t Sensor::getFlags() const {
404 return mFlags;
405 }
406
isWakeUpSensor() const407 bool Sensor::isWakeUpSensor() const {
408 return (mFlags & SENSOR_FLAG_WAKE_UP) != 0;
409 }
410
isDynamicSensor() const411 bool Sensor::isDynamicSensor() const {
412 return (mFlags & SENSOR_FLAG_DYNAMIC_SENSOR) != 0;
413 }
414
hasAdditionalInfo() const415 bool Sensor::hasAdditionalInfo() const {
416 return (mFlags & SENSOR_FLAG_ADDITIONAL_INFO) != 0;
417 }
418
getHighestDirectReportRateLevel() const419 int32_t Sensor::getHighestDirectReportRateLevel() const {
420 return ((mFlags & SENSOR_FLAG_MASK_DIRECT_REPORT) >> SENSOR_FLAG_SHIFT_DIRECT_REPORT);
421 }
422
isDirectChannelTypeSupported(int32_t sharedMemType) const423 bool Sensor::isDirectChannelTypeSupported(int32_t sharedMemType) const {
424 switch (sharedMemType) {
425 case SENSOR_DIRECT_MEM_TYPE_ASHMEM:
426 return mFlags & SENSOR_FLAG_DIRECT_CHANNEL_ASHMEM;
427 case SENSOR_DIRECT_MEM_TYPE_GRALLOC:
428 return mFlags & SENSOR_FLAG_DIRECT_CHANNEL_GRALLOC;
429 default:
430 return false;
431 }
432 }
433
getReportingMode() const434 int32_t Sensor::getReportingMode() const {
435 return ((mFlags & REPORTING_MODE_MASK) >> REPORTING_MODE_SHIFT);
436 }
437
getUuid() const438 const Sensor::uuid_t& Sensor::getUuid() const {
439 return mUuid;
440 }
441
setId(int32_t id)442 void Sensor::setId(int32_t id) {
443 mUuid.i64[0] = id;
444 mUuid.i64[1] = 0;
445 }
446
getId() const447 int32_t Sensor::getId() const {
448 return int32_t(mUuid.i64[0]);
449 }
450
getFlattenedSize() const451 size_t Sensor::getFlattenedSize() const {
452 size_t fixedSize =
453 sizeof(mVersion) + sizeof(mHandle) + sizeof(mType) +
454 sizeof(mMinValue) + sizeof(mMaxValue) + sizeof(mResolution) +
455 sizeof(mPower) + sizeof(mMinDelay) + sizeof(mFifoMaxEventCount) +
456 sizeof(mFifoMaxEventCount) + sizeof(mRequiredPermissionRuntime) +
457 sizeof(mRequiredAppOp) + sizeof(mMaxDelay) + sizeof(mFlags) + sizeof(mUuid);
458
459 size_t variableSize =
460 sizeof(uint32_t) + FlattenableUtils::align<4>(mName.length()) +
461 sizeof(uint32_t) + FlattenableUtils::align<4>(mVendor.length()) +
462 sizeof(uint32_t) + FlattenableUtils::align<4>(mStringType.length()) +
463 sizeof(uint32_t) + FlattenableUtils::align<4>(mRequiredPermission.length());
464
465 return fixedSize + variableSize;
466 }
467
flatten(void * buffer,size_t size) const468 status_t Sensor::flatten(void* buffer, size_t size) const {
469 if (size < getFlattenedSize()) {
470 return NO_MEMORY;
471 }
472
473 flattenString8(buffer, size, mName);
474 flattenString8(buffer, size, mVendor);
475 FlattenableUtils::write(buffer, size, mVersion);
476 FlattenableUtils::write(buffer, size, mHandle);
477 FlattenableUtils::write(buffer, size, mType);
478 FlattenableUtils::write(buffer, size, mMinValue);
479 FlattenableUtils::write(buffer, size, mMaxValue);
480 FlattenableUtils::write(buffer, size, mResolution);
481 FlattenableUtils::write(buffer, size, mPower);
482 FlattenableUtils::write(buffer, size, mMinDelay);
483 FlattenableUtils::write(buffer, size, mFifoReservedEventCount);
484 FlattenableUtils::write(buffer, size, mFifoMaxEventCount);
485 flattenString8(buffer, size, mStringType);
486 flattenString8(buffer, size, mRequiredPermission);
487 FlattenableUtils::write(buffer, size, mRequiredPermissionRuntime);
488 FlattenableUtils::write(buffer, size, mRequiredAppOp);
489 FlattenableUtils::write(buffer, size, mMaxDelay);
490 FlattenableUtils::write(buffer, size, mFlags);
491 if (mUuid.i64[1] != 0) {
492 // We should never hit this case with our current API, but we
493 // could via a careless API change. If that happens,
494 // this code will keep us from leaking our UUID (while probably
495 // breaking dynamic sensors). See b/29547335.
496 ALOGW("Sensor with UUID being flattened; sending 0. Expect "
497 "bad dynamic sensor behavior");
498 uuid_t tmpUuid; // default constructor makes this 0.
499 FlattenableUtils::write(buffer, size, tmpUuid);
500 } else {
501 FlattenableUtils::write(buffer, size, mUuid);
502 }
503 return NO_ERROR;
504 }
505
unflatten(void const * buffer,size_t size)506 status_t Sensor::unflatten(void const* buffer, size_t size) {
507 if (!unflattenString8(buffer, size, mName)) {
508 return NO_MEMORY;
509 }
510 if (!unflattenString8(buffer, size, mVendor)) {
511 return NO_MEMORY;
512 }
513
514 size_t fixedSize1 =
515 sizeof(mVersion) + sizeof(mHandle) + sizeof(mType) + sizeof(mMinValue) +
516 sizeof(mMaxValue) + sizeof(mResolution) + sizeof(mPower) + sizeof(mMinDelay) +
517 sizeof(mFifoMaxEventCount) + sizeof(mFifoMaxEventCount);
518 if (size < fixedSize1) {
519 return NO_MEMORY;
520 }
521
522 FlattenableUtils::read(buffer, size, mVersion);
523 FlattenableUtils::read(buffer, size, mHandle);
524 FlattenableUtils::read(buffer, size, mType);
525 FlattenableUtils::read(buffer, size, mMinValue);
526 FlattenableUtils::read(buffer, size, mMaxValue);
527 FlattenableUtils::read(buffer, size, mResolution);
528 FlattenableUtils::read(buffer, size, mPower);
529 FlattenableUtils::read(buffer, size, mMinDelay);
530 FlattenableUtils::read(buffer, size, mFifoReservedEventCount);
531 FlattenableUtils::read(buffer, size, mFifoMaxEventCount);
532
533 if (!unflattenString8(buffer, size, mStringType)) {
534 return NO_MEMORY;
535 }
536 if (!unflattenString8(buffer, size, mRequiredPermission)) {
537 return NO_MEMORY;
538 }
539
540 size_t fixedSize2 =
541 sizeof(mRequiredPermissionRuntime) + sizeof(mRequiredAppOp) + sizeof(mMaxDelay) +
542 sizeof(mFlags) + sizeof(mUuid);
543 if (size < fixedSize2) {
544 return NO_MEMORY;
545 }
546
547 FlattenableUtils::read(buffer, size, mRequiredPermissionRuntime);
548 FlattenableUtils::read(buffer, size, mRequiredAppOp);
549 FlattenableUtils::read(buffer, size, mMaxDelay);
550 FlattenableUtils::read(buffer, size, mFlags);
551 FlattenableUtils::read(buffer, size, mUuid);
552 return NO_ERROR;
553 }
554
flattenString8(void * & buffer,size_t & size,const String8 & string8)555 void Sensor::flattenString8(void*& buffer, size_t& size,
556 const String8& string8) {
557 uint32_t len = static_cast<uint32_t>(string8.length());
558 FlattenableUtils::write(buffer, size, len);
559 memcpy(static_cast<char*>(buffer), string8.string(), len);
560 FlattenableUtils::advance(buffer, size, FlattenableUtils::align<4>(len));
561 }
562
unflattenString8(void const * & buffer,size_t & size,String8 & outputString8)563 bool Sensor::unflattenString8(void const*& buffer, size_t& size, String8& outputString8) {
564 uint32_t len;
565 if (size < sizeof(len)) {
566 return false;
567 }
568 FlattenableUtils::read(buffer, size, len);
569 if (size < len) {
570 return false;
571 }
572 outputString8.setTo(static_cast<char const*>(buffer), len);
573 FlattenableUtils::advance(buffer, size, FlattenableUtils::align<4>(len));
574 return true;
575 }
576
577 // ----------------------------------------------------------------------------
578 }; // namespace android
579