sensors/multihal_sensors_qemu.cpp - device/generic/goldfish - Git at Google

 /*
  * Copyright (C) 2020 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include <log/log.h>
 #include <utils/SystemClock.h>
 #include <math.h>
 #include <qemud.h>
 #include "multihal_sensors.h"
 #include "sensor_list.h"

 namespace goldfish {
 using ahs10::EventPayload;
 using ahs21::SensorType;
 using ahs10::SensorStatus;

 namespace {
 const char* testPrefix(const char* i, const char* end, const char* v, const char sep) {
     while (i < end) {
         if (*v == 0) {
             return (*i == sep) ? (i + 1) : nullptr;
         } else if (*v == *i) {
             ++v;
             ++i;
         } else {
             return nullptr;
         }
     }

     return nullptr;
 }

 bool approximatelyEqual(double a, double b, double eps) {
     return fabs(a - b) <= std::max(fabs(a), fabs(b)) * eps;
 }

 int64_t weigthedAverage(const int64_t a, int64_t aw, int64_t b, int64_t bw) {
     return (a * aw + b * bw) / (aw + bw);
 }

 }  // namespace

 bool MultihalSensors::activateQemuSensorImpl(const int pipe,
                                              const int sensorHandle,
                                              const bool enabled) {
     char buffer[64];
     int len = snprintf(buffer, sizeof(buffer),
                        "set:%s:%d",
                        getQemuSensorNameByHandle(sensorHandle),
                        (enabled ? 1 : 0));

     if (qemud_channel_send(pipe, buffer, len) < 0) {
         ALOGE("%s:%d: qemud_channel_send failed", __func__, __LINE__);
         return false;
     } else {
         return true;
     }
 }

 bool MultihalSensors::setAllQemuSensors(const bool enabled) {
     uint32_t mask = m_availableSensorsMask;
     for (int i = 0; mask; ++i, mask >>= 1) {
         if (mask & 1) {
             if (!activateQemuSensorImpl(m_qemuSensorsFd.get(), i, enabled)) {
                 return false;
             }
         }
     }

     return true;
 }

 void MultihalSensors::parseQemuSensorEvent(const int pipe,
                                            QemuSensorsProtocolState* state) {
     char buf[256];
     const int len = qemud_channel_recv(pipe, buf, sizeof(buf) - 1);
     if (len < 0) {
         ALOGE("%s:%d: qemud_channel_recv failed", __func__, __LINE__);
     }
     const int64_t nowNs = ::android::elapsedRealtimeNano();
     buf[len] = 0;
     const char* end = buf + len;

     bool parsed = false;
     Event event;
     EventPayload* payload = &event.u;
     ahs10::Vec3* vec3 = &payload->vec3;
     ahs10::Uncal* uncal = &payload->uncal;

     if (const char* values = testPrefix(buf, end, "acceleration", ':')) {
         if (sscanf(values, "%f:%f:%f",
                    &vec3->x, &vec3->y, &vec3->z) == 3) {
             vec3->status = SensorStatus::ACCURACY_MEDIUM;
             event.timestamp = nowNs + state->timeBiasNs;
             event.sensorHandle = kSensorHandleAccelerometer;
             event.sensorType = SensorType::ACCELEROMETER;
             postSensorEvent(event);
             parsed = true;
         }
     } else if (const char* values = testPrefix(buf, end, "gyroscope", ':')) {
         if (sscanf(values, "%f:%f:%f",
                    &vec3->x, &vec3->y, &vec3->z) == 3) {
             vec3->status = SensorStatus::ACCURACY_MEDIUM;
             event.timestamp = nowNs + state->timeBiasNs;
             event.sensorHandle = kSensorHandleGyroscope;
             event.sensorType = SensorType::GYROSCOPE;
             postSensorEvent(event);
             parsed = true;
         }
     } else if (const char* values = testPrefix(buf, end, "gyroscope-uncalibrated", ':')) {
         if (sscanf(values, "%f:%f:%f",
                    &uncal->x, &uncal->y, &uncal->z) == 3) {
             uncal->x_bias = 0.0;
             uncal->y_bias = 0.0;
             uncal->z_bias = 0.0;
             event.timestamp = nowNs + state->timeBiasNs;
             event.sensorHandle = kSensorHandleGyroscopeFieldUncalibrated;
             event.sensorType = SensorType::GYROSCOPE_UNCALIBRATED;
             postSensorEvent(event);
             parsed = true;
         }
     } else if (const char* values = testPrefix(buf, end, "orientation", ':')) {
         if (sscanf(values, "%f:%f:%f",
                    &vec3->x, &vec3->y, &vec3->z) == 3) {
             vec3->status = SensorStatus::ACCURACY_HIGH;
             event.timestamp = nowNs + state->timeBiasNs;
             event.sensorHandle = kSensorHandleOrientation;
             event.sensorType = SensorType::ORIENTATION;
             postSensorEvent(event);
             parsed = true;
         }
     } else if (const char* values = testPrefix(buf, end, "magnetic", ':')) {
         if (sscanf(values, "%f:%f:%f",
                    &vec3->x, &vec3->y, &vec3->z) == 3) {
             vec3->status = SensorStatus::ACCURACY_HIGH;
             event.timestamp = nowNs + state->timeBiasNs;
             event.sensorHandle = kSensorHandleMagneticField;
             event.sensorType = SensorType::MAGNETIC_FIELD;
             postSensorEvent(event);
             parsed = true;
         }
     } else if (const char* values = testPrefix(buf, end, "magnetic-uncalibrated", ':')) {
         if (sscanf(values, "%f:%f:%f",
                    &uncal->x, &uncal->y, &uncal->z) == 3) {
             uncal->x_bias = 0.0;
             uncal->y_bias = 0.0;
             uncal->z_bias = 0.0;
             event.timestamp = nowNs + state->timeBiasNs;
             event.sensorHandle = kSensorHandleMagneticFieldUncalibrated;
             event.sensorType = SensorType::MAGNETIC_FIELD_UNCALIBRATED;
             postSensorEvent(event);
             parsed = true;
         }
     } else if (const char* values = testPrefix(buf, end, "temperature", ':')) {
         if (sscanf(values, "%f", &payload->scalar) == 1) {
             if (!approximatelyEqual(state->lastAmbientTemperatureValue,
                                     payload->scalar, 0.001)) {
                 event.timestamp = nowNs + state->timeBiasNs;
                 event.sensorHandle = kSensorHandleAmbientTemperature;
                 event.sensorType = SensorType::AMBIENT_TEMPERATURE;
                 postSensorEvent(event);
                 state->lastAmbientTemperatureValue = payload->scalar;
             }
             parsed = true;
         }
     } else if (const char* values = testPrefix(buf, end, "proximity", ':')) {
         if (sscanf(values, "%f", &payload->scalar) == 1) {
             if (!approximatelyEqual(state->lastProximityValue,
                                     payload->scalar, 0.001)) {
                 event.timestamp = nowNs + state->timeBiasNs;
                 event.sensorHandle = kSensorHandleProximity;
                 event.sensorType = SensorType::PROXIMITY;
                 postSensorEvent(event);
                 state->lastProximityValue = payload->scalar;
             }
             parsed = true;
         }
     } else if (const char* values = testPrefix(buf, end, "light", ':')) {
         if (sscanf(values, "%f", &payload->scalar) == 1) {
             if (!approximatelyEqual(state->lastLightValue,
                                     payload->scalar, 0.001)) {
                 event.timestamp = nowNs + state->timeBiasNs;
                 event.sensorHandle = kSensorHandleLight;
                 event.sensorType = SensorType::LIGHT;
                 postSensorEvent(event);
                 state->lastLightValue = payload->scalar;
             }
             parsed = true;
         }
     } else if (const char* values = testPrefix(buf, end, "pressure", ':')) {
         if (sscanf(values, "%f", &payload->scalar) == 1) {
             event.timestamp = nowNs + state->timeBiasNs;
             event.sensorHandle = kSensorHandlePressure;
             event.sensorType = SensorType::PRESSURE;
             postSensorEvent(event);
             parsed = true;
         }
     } else if (const char* values = testPrefix(buf, end, "humidity", ':')) {
         if (sscanf(values, "%f", &payload->scalar) == 1) {
             if (!approximatelyEqual(state->lastRelativeHumidityValue,
                                     payload->scalar, 0.001)) {
                 event.timestamp = nowNs + state->timeBiasNs;
                 event.sensorHandle = kSensorHandleRelativeHumidity;
                 event.sensorType = SensorType::RELATIVE_HUMIDITY;
                 postSensorEvent(event);
                 state->lastRelativeHumidityValue = payload->scalar;
             }
             parsed = true;
         }
     } else if (const char* values = testPrefix(buf, end, "hinge-angle0", ':')) {
         if (sscanf(values, "%f", &payload->scalar) == 1) {
             if (!approximatelyEqual(state->lastHingeAngle0Value,
                                     payload->scalar, 0.001) &&
                 // b/197586273, ignore the state tracking if system sensor
                 // service has not enabled hinge sensor
                 isSensorActive(kSensorHandleHingeAngle0)) {
                 event.timestamp = nowNs + state->timeBiasNs;
                 event.sensorHandle = kSensorHandleHingeAngle0;
                 event.sensorType = SensorType::HINGE_ANGLE;
                 postSensorEvent(event);
                 state->lastHingeAngle0Value = payload->scalar;
             }
             parsed = true;
         }
     } else if (const char* values = testPrefix(buf, end, "hinge-angle1", ':')) {
         if (sscanf(values, "%f", &payload->scalar) == 1) {
             if (!approximatelyEqual(state->lastHingeAngle1Value,
                                     payload->scalar, 0.001) &&
                 isSensorActive(kSensorHandleHingeAngle1)) {
                 event.timestamp = nowNs + state->timeBiasNs;
                 event.sensorHandle = kSensorHandleHingeAngle1;
                 event.sensorType = SensorType::HINGE_ANGLE;
                 postSensorEvent(event);
                 state->lastHingeAngle1Value = payload->scalar;
             }
             parsed = true;
         }
     } else if (const char* values = testPrefix(buf, end, "hinge-angle2", ':')) {
         if (sscanf(values, "%f", &payload->scalar) == 1) {
             if (!approximatelyEqual(state->lastHingeAngle2Value,
                                     payload->scalar, 0.001) &&
                 isSensorActive(kSensorHandleHingeAngle2)) {
                 event.timestamp = nowNs + state->timeBiasNs;
                 event.sensorHandle = kSensorHandleHingeAngle2;
                 event.sensorType = SensorType::HINGE_ANGLE;
                 postSensorEvent(event);
                 state->lastHingeAngle2Value = payload->scalar;
             }
             parsed = true;
         }
     } else if (const char* values = testPrefix(buf, end, "heart-rate", ':')) {
         if (sscanf(values, "%f", &payload->heartRate.bpm) == 1) {
             if (!approximatelyEqual(state->lastHeartRateValue,
                                     payload->heartRate.bpm, 0.001)) {
                 payload->heartRate.status = SensorStatus::ACCURACY_HIGH;
                 event.timestamp = nowNs + state->timeBiasNs;
                 event.sensorHandle = kSensorHandleHeartRate;
                 event.sensorType = SensorType::HEART_RATE;
                 postSensorEvent(event);
                 state->lastHeartRateValue = payload->heartRate.bpm;
             }
             parsed = true;
         }
     } else if (const char* values = testPrefix(buf, end, "wrist-tilt", ':')) {
         long measurementId;
         int args = sscanf(values, "%f:%ld", &payload->scalar, &measurementId);
         if (args == 2) {
             if (state->lastWristTiltMeasurement != measurementId) {
                 event.timestamp = nowNs + state->timeBiasNs;
                 event.sensorHandle = kSensorHandleWristTilt;
                 event.sensorType = SensorType::WRIST_TILT_GESTURE;
                 postSensorEvent(event);
                 state->lastWristTiltMeasurement = measurementId;
             }
         }
         if (args >= 1) {
             // Skip if the measurement id is not included.
             parsed = true;
         }

      } else if (const char* values = testPrefix(buf, end, "guest-sync", ':')) {
         long long value;
         if ((sscanf(values, "%lld", &value) == 1) && (value >= 0)) {
             const int64_t guestTimeNs = static_cast<int64_t>(value * 1000LL);
             const int64_t timeBiasNs = guestTimeNs - nowNs;
             state->timeBiasNs =
                 std::min(int64_t(0),
                          weigthedAverage(state->timeBiasNs, 3, timeBiasNs, 1));
             parsed = true;
         }
     } else if (const char* values = testPrefix(buf, end, "sync", ':')) {
         parsed = true;
     }

     if (!parsed) {
         ALOGW("%s:%d: don't know how to parse '%s'", __func__, __LINE__, buf);
     }
 }

 }  // namespace
	/*
	* Copyright (C) 2020 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include <log/log.h>
	#include <utils/SystemClock.h>
	#include <math.h>
	#include <qemud.h>
	#include "multihal_sensors.h"
	#include "sensor_list.h"

	namespace goldfish {
	using ahs10::EventPayload;
	using ahs21::SensorType;
	using ahs10::SensorStatus;

	namespace {
	const char* testPrefix(const char* i, const char* end, const char* v, const char sep) {
	while (i < end) {
	if (*v == 0) {
	return (*i == sep) ? (i + 1) : nullptr;
	} else if (v == i) {
	++v;
	++i;
	} else {
	return nullptr;
	}
	}

	return nullptr;
	}

	bool approximatelyEqual(double a, double b, double eps) {
	return fabs(a - b) <= std::max(fabs(a), fabs(b)) * eps;
	}

	int64_t weigthedAverage(const int64_t a, int64_t aw, int64_t b, int64_t bw) {
	return (a * aw + b * bw) / (aw + bw);
	}

	} // namespace

	bool MultihalSensors::activateQemuSensorImpl(const int pipe,
	const int sensorHandle,
	const bool enabled) {
	char buffer[64];
	int len = snprintf(buffer, sizeof(buffer),
	"set:%s:%d",
	getQemuSensorNameByHandle(sensorHandle),
	(enabled ? 1 : 0));

	if (qemud_channel_send(pipe, buffer, len) < 0) {
	ALOGE("%s:%d: qemud_channel_send failed", __func__, __LINE__);
	return false;
	} else {
	return true;
	}
	}

	bool MultihalSensors::setAllQemuSensors(const bool enabled) {
	uint32_t mask = m_availableSensorsMask;
	for (int i = 0; mask; ++i, mask >>= 1) {
	if (mask & 1) {
	if (!activateQemuSensorImpl(m_qemuSensorsFd.get(), i, enabled)) {
	return false;
	}
	}
	}

	return true;
	}

	void MultihalSensors::parseQemuSensorEvent(const int pipe,
	QemuSensorsProtocolState* state) {
	char buf[256];
	const int len = qemud_channel_recv(pipe, buf, sizeof(buf) - 1);
	if (len < 0) {
	ALOGE("%s:%d: qemud_channel_recv failed", __func__, __LINE__);
	}
	const int64_t nowNs = ::android::elapsedRealtimeNano();
	buf[len] = 0;
	const char* end = buf + len;

	bool parsed = false;
	Event event;
	EventPayload* payload = &event.u;
	ahs10::Vec3* vec3 = &payload->vec3;
	ahs10::Uncal* uncal = &payload->uncal;

	if (const char* values = testPrefix(buf, end, "acceleration", ':')) {
	if (sscanf(values, "%f:%f:%f",
	&vec3->x, &vec3->y, &vec3->z) == 3) {
	vec3->status = SensorStatus::ACCURACY_MEDIUM;
	event.timestamp = nowNs + state->timeBiasNs;
	event.sensorHandle = kSensorHandleAccelerometer;
	event.sensorType = SensorType::ACCELEROMETER;
	postSensorEvent(event);
	parsed = true;
	}
	} else if (const char* values = testPrefix(buf, end, "gyroscope", ':')) {
	if (sscanf(values, "%f:%f:%f",
	&vec3->x, &vec3->y, &vec3->z) == 3) {
	vec3->status = SensorStatus::ACCURACY_MEDIUM;
	event.timestamp = nowNs + state->timeBiasNs;
	event.sensorHandle = kSensorHandleGyroscope;
	event.sensorType = SensorType::GYROSCOPE;
	postSensorEvent(event);
	parsed = true;
	}
	} else if (const char* values = testPrefix(buf, end, "gyroscope-uncalibrated", ':')) {
	if (sscanf(values, "%f:%f:%f",
	&uncal->x, &uncal->y, &uncal->z) == 3) {
	uncal->x_bias = 0.0;
	uncal->y_bias = 0.0;
	uncal->z_bias = 0.0;
	event.timestamp = nowNs + state->timeBiasNs;
	event.sensorHandle = kSensorHandleGyroscopeFieldUncalibrated;
	event.sensorType = SensorType::GYROSCOPE_UNCALIBRATED;
	postSensorEvent(event);
	parsed = true;
	}
	} else if (const char* values = testPrefix(buf, end, "orientation", ':')) {
	if (sscanf(values, "%f:%f:%f",
	&vec3->x, &vec3->y, &vec3->z) == 3) {
	vec3->status = SensorStatus::ACCURACY_HIGH;
	event.timestamp = nowNs + state->timeBiasNs;
	event.sensorHandle = kSensorHandleOrientation;
	event.sensorType = SensorType::ORIENTATION;
	postSensorEvent(event);
	parsed = true;
	}
	} else if (const char* values = testPrefix(buf, end, "magnetic", ':')) {
	if (sscanf(values, "%f:%f:%f",
	&vec3->x, &vec3->y, &vec3->z) == 3) {
	vec3->status = SensorStatus::ACCURACY_HIGH;
	event.timestamp = nowNs + state->timeBiasNs;
	event.sensorHandle = kSensorHandleMagneticField;
	event.sensorType = SensorType::MAGNETIC_FIELD;
	postSensorEvent(event);
	parsed = true;
	}
	} else if (const char* values = testPrefix(buf, end, "magnetic-uncalibrated", ':')) {
	if (sscanf(values, "%f:%f:%f",
	&uncal->x, &uncal->y, &uncal->z) == 3) {
	uncal->x_bias = 0.0;
	uncal->y_bias = 0.0;
	uncal->z_bias = 0.0;
	event.timestamp = nowNs + state->timeBiasNs;
	event.sensorHandle = kSensorHandleMagneticFieldUncalibrated;
	event.sensorType = SensorType::MAGNETIC_FIELD_UNCALIBRATED;
	postSensorEvent(event);
	parsed = true;
	}
	} else if (const char* values = testPrefix(buf, end, "temperature", ':')) {
	if (sscanf(values, "%f", &payload->scalar) == 1) {
	if (!approximatelyEqual(state->lastAmbientTemperatureValue,
	payload->scalar, 0.001)) {
	event.timestamp = nowNs + state->timeBiasNs;
	event.sensorHandle = kSensorHandleAmbientTemperature;
	event.sensorType = SensorType::AMBIENT_TEMPERATURE;
	postSensorEvent(event);
	state->lastAmbientTemperatureValue = payload->scalar;
	}
	parsed = true;
	}
	} else if (const char* values = testPrefix(buf, end, "proximity", ':')) {
	if (sscanf(values, "%f", &payload->scalar) == 1) {
	if (!approximatelyEqual(state->lastProximityValue,
	payload->scalar, 0.001)) {
	event.timestamp = nowNs + state->timeBiasNs;
	event.sensorHandle = kSensorHandleProximity;
	event.sensorType = SensorType::PROXIMITY;
	postSensorEvent(event);
	state->lastProximityValue = payload->scalar;
	}
	parsed = true;
	}
	} else if (const char* values = testPrefix(buf, end, "light", ':')) {
	if (sscanf(values, "%f", &payload->scalar) == 1) {
	if (!approximatelyEqual(state->lastLightValue,
	payload->scalar, 0.001)) {
	event.timestamp = nowNs + state->timeBiasNs;
	event.sensorHandle = kSensorHandleLight;
	event.sensorType = SensorType::LIGHT;
	postSensorEvent(event);
	state->lastLightValue = payload->scalar;
	}
	parsed = true;
	}
	} else if (const char* values = testPrefix(buf, end, "pressure", ':')) {
	if (sscanf(values, "%f", &payload->scalar) == 1) {
	event.timestamp = nowNs + state->timeBiasNs;
	event.sensorHandle = kSensorHandlePressure;
	event.sensorType = SensorType::PRESSURE;
	postSensorEvent(event);
	parsed = true;
	}
	} else if (const char* values = testPrefix(buf, end, "humidity", ':')) {
	if (sscanf(values, "%f", &payload->scalar) == 1) {
	if (!approximatelyEqual(state->lastRelativeHumidityValue,
	payload->scalar, 0.001)) {
	event.timestamp = nowNs + state->timeBiasNs;
	event.sensorHandle = kSensorHandleRelativeHumidity;
	event.sensorType = SensorType::RELATIVE_HUMIDITY;
	postSensorEvent(event);
	state->lastRelativeHumidityValue = payload->scalar;
	}
	parsed = true;
	}
	} else if (const char* values = testPrefix(buf, end, "hinge-angle0", ':')) {
	if (sscanf(values, "%f", &payload->scalar) == 1) {
	if (!approximatelyEqual(state->lastHingeAngle0Value,
	payload->scalar, 0.001) &&
	// b/197586273, ignore the state tracking if system sensor
	// service has not enabled hinge sensor
	isSensorActive(kSensorHandleHingeAngle0)) {
	event.timestamp = nowNs + state->timeBiasNs;
	event.sensorHandle = kSensorHandleHingeAngle0;
	event.sensorType = SensorType::HINGE_ANGLE;
	postSensorEvent(event);
	state->lastHingeAngle0Value = payload->scalar;
	}
	parsed = true;
	}
	} else if (const char* values = testPrefix(buf, end, "hinge-angle1", ':')) {
	if (sscanf(values, "%f", &payload->scalar) == 1) {
	if (!approximatelyEqual(state->lastHingeAngle1Value,
	payload->scalar, 0.001) &&
	isSensorActive(kSensorHandleHingeAngle1)) {
	event.timestamp = nowNs + state->timeBiasNs;
	event.sensorHandle = kSensorHandleHingeAngle1;
	event.sensorType = SensorType::HINGE_ANGLE;
	postSensorEvent(event);
	state->lastHingeAngle1Value = payload->scalar;
	}
	parsed = true;
	}
	} else if (const char* values = testPrefix(buf, end, "hinge-angle2", ':')) {
	if (sscanf(values, "%f", &payload->scalar) == 1) {
	if (!approximatelyEqual(state->lastHingeAngle2Value,
	payload->scalar, 0.001) &&
	isSensorActive(kSensorHandleHingeAngle2)) {
	event.timestamp = nowNs + state->timeBiasNs;
	event.sensorHandle = kSensorHandleHingeAngle2;
	event.sensorType = SensorType::HINGE_ANGLE;
	postSensorEvent(event);
	state->lastHingeAngle2Value = payload->scalar;
	}
	parsed = true;
	}
	} else if (const char* values = testPrefix(buf, end, "heart-rate", ':')) {
	if (sscanf(values, "%f", &payload->heartRate.bpm) == 1) {
	if (!approximatelyEqual(state->lastHeartRateValue,
	payload->heartRate.bpm, 0.001)) {
	payload->heartRate.status = SensorStatus::ACCURACY_HIGH;
	event.timestamp = nowNs + state->timeBiasNs;
	event.sensorHandle = kSensorHandleHeartRate;
	event.sensorType = SensorType::HEART_RATE;
	postSensorEvent(event);
	state->lastHeartRateValue = payload->heartRate.bpm;
	}
	parsed = true;
	}
	} else if (const char* values = testPrefix(buf, end, "wrist-tilt", ':')) {
	long measurementId;
	int args = sscanf(values, "%f:%ld", &payload->scalar, &measurementId);
	if (args == 2) {
	if (state->lastWristTiltMeasurement != measurementId) {
	event.timestamp = nowNs + state->timeBiasNs;
	event.sensorHandle = kSensorHandleWristTilt;
	event.sensorType = SensorType::WRIST_TILT_GESTURE;
	postSensorEvent(event);
	state->lastWristTiltMeasurement = measurementId;
	}
	}
	if (args >= 1) {
	// Skip if the measurement id is not included.
	parsed = true;
	}

	} else if (const char* values = testPrefix(buf, end, "guest-sync", ':')) {
	long long value;
	if ((sscanf(values, "%lld", &value) == 1) && (value >= 0)) {
	const int64_t guestTimeNs = static_cast<int64_t>(value * 1000LL);
	const int64_t timeBiasNs = guestTimeNs - nowNs;
	state->timeBiasNs =
	std::min(int64_t(0),
	weigthedAverage(state->timeBiasNs, 3, timeBiasNs, 1));
	parsed = true;
	}
	} else if (const char* values = testPrefix(buf, end, "sync", ':')) {
	parsed = true;
	}

	if (!parsed) {
	ALOGW("%s:%d: don't know how to parse '%s'", __func__, __LINE__, buf);
	}
	}

	} // namespace