954 lines
31 KiB
C
954 lines
31 KiB
C
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ANDROID_INCLUDE_HARDWARE_GPS_H
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#define ANDROID_INCLUDE_HARDWARE_GPS_H
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#include <stdint.h>
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <pthread.h>
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#include <hardware/hardware.h>
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__BEGIN_DECLS
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/**
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* The id of this module
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*/
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#define GPS_HARDWARE_MODULE_ID "gps"
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/** Milliseconds since January 1, 1970 */
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typedef int64_t GpsUtcTime;
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/** Maximum number of SVs for gps_sv_status_callback(). */
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#define GPS_MAX_SVS 32
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/** Requested operational mode for GPS operation. */
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typedef uint32_t GpsPositionMode;
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// IMPORTANT: Note that the following values must match
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// constants in GpsLocationProvider.java.
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/** Mode for running GPS standalone (no assistance). */
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#define GPS_POSITION_MODE_STANDALONE 0
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/** AGPS MS-Based mode. */
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#define GPS_POSITION_MODE_MS_BASED 1
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/** AGPS MS-Assisted mode. */
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#define GPS_POSITION_MODE_MS_ASSISTED 2
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/** Requested recurrence mode for GPS operation. */
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typedef uint32_t GpsPositionRecurrence;
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// IMPORTANT: Note that the following values must match
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// constants in GpsLocationProvider.java.
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/** Receive GPS fixes on a recurring basis at a specified period. */
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#define GPS_POSITION_RECURRENCE_PERIODIC 0
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/** Request a single shot GPS fix. */
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#define GPS_POSITION_RECURRENCE_SINGLE 1
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/** GPS status event values. */
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typedef uint16_t GpsStatusValue;
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// IMPORTANT: Note that the following values must match
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// constants in GpsLocationProvider.java.
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/** GPS status unknown. */
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#define GPS_STATUS_NONE 0
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/** GPS has begun navigating. */
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#define GPS_STATUS_SESSION_BEGIN 1
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/** GPS has stopped navigating. */
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#define GPS_STATUS_SESSION_END 2
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/** GPS has powered on but is not navigating. */
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#define GPS_STATUS_ENGINE_ON 3
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/** GPS is powered off. */
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#define GPS_STATUS_ENGINE_OFF 4
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/** Flags to indicate which values are valid in a GpsLocation. */
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typedef uint16_t GpsLocationFlags;
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// IMPORTANT: Note that the following values must match
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// constants in GpsLocationProvider.java.
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/** GpsLocation has valid latitude and longitude. */
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#define GPS_LOCATION_HAS_LAT_LONG 0x0001
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/** GpsLocation has valid altitude. */
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#define GPS_LOCATION_HAS_ALTITUDE 0x0002
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/** GpsLocation has valid speed. */
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#define GPS_LOCATION_HAS_SPEED 0x0004
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/** GpsLocation has valid bearing. */
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#define GPS_LOCATION_HAS_BEARING 0x0008
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/** GpsLocation has valid accuracy. */
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#define GPS_LOCATION_HAS_ACCURACY 0x0010
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/** Flags for the gps_set_capabilities callback. */
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/** GPS HAL schedules fixes for GPS_POSITION_RECURRENCE_PERIODIC mode.
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If this is not set, then the framework will use 1000ms for min_interval
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and will start and call start() and stop() to schedule the GPS.
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*/
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#define GPS_CAPABILITY_SCHEDULING 0x0000001
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/** GPS supports MS-Based AGPS mode */
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#define GPS_CAPABILITY_MSB 0x0000002
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/** GPS supports MS-Assisted AGPS mode */
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#define GPS_CAPABILITY_MSA 0x0000004
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/** GPS supports single-shot fixes */
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#define GPS_CAPABILITY_SINGLE_SHOT 0x0000008
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/** GPS supports on demand time injection */
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#define GPS_CAPABILITY_ON_DEMAND_TIME 0x0000010
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/** GPS supports Geofencing */
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#define GPS_CAPABILITY_GEOFENCING 0x0000020
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/** Flags used to specify which aiding data to delete
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when calling delete_aiding_data(). */
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typedef uint16_t GpsAidingData;
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// IMPORTANT: Note that the following values must match
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// constants in GpsLocationProvider.java.
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#define GPS_DELETE_EPHEMERIS 0x0001
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#define GPS_DELETE_ALMANAC 0x0002
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#define GPS_DELETE_POSITION 0x0004
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#define GPS_DELETE_TIME 0x0008
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#define GPS_DELETE_IONO 0x0010
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#define GPS_DELETE_UTC 0x0020
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#define GPS_DELETE_HEALTH 0x0040
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#define GPS_DELETE_SVDIR 0x0080
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#define GPS_DELETE_SVSTEER 0x0100
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#define GPS_DELETE_SADATA 0x0200
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#define GPS_DELETE_RTI 0x0400
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#define GPS_DELETE_CELLDB_INFO 0x8000
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#define GPS_DELETE_ALL 0xFFFF
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/** AGPS type */
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typedef uint16_t AGpsType;
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#define AGPS_TYPE_SUPL 1
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#define AGPS_TYPE_C2K 2
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typedef uint16_t AGpsSetIDType;
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#define AGPS_SETID_TYPE_NONE 0
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#define AGPS_SETID_TYPE_IMSI 1
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#define AGPS_SETID_TYPE_MSISDN 2
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/**
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* String length constants
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*/
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#define GPS_NI_SHORT_STRING_MAXLEN 256
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#define GPS_NI_LONG_STRING_MAXLEN 2048
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/**
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* GpsNiType constants
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*/
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typedef uint32_t GpsNiType;
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#define GPS_NI_TYPE_VOICE 1
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#define GPS_NI_TYPE_UMTS_SUPL 2
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#define GPS_NI_TYPE_UMTS_CTRL_PLANE 3
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/**
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* GpsNiNotifyFlags constants
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*/
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typedef uint32_t GpsNiNotifyFlags;
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/** NI requires notification */
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#define GPS_NI_NEED_NOTIFY 0x0001
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/** NI requires verification */
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#define GPS_NI_NEED_VERIFY 0x0002
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/** NI requires privacy override, no notification/minimal trace */
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#define GPS_NI_PRIVACY_OVERRIDE 0x0004
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/**
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* GPS NI responses, used to define the response in
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* NI structures
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*/
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typedef int GpsUserResponseType;
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#define GPS_NI_RESPONSE_ACCEPT 1
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#define GPS_NI_RESPONSE_DENY 2
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#define GPS_NI_RESPONSE_NORESP 3
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/**
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* NI data encoding scheme
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*/
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typedef int GpsNiEncodingType;
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#define GPS_ENC_NONE 0
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#define GPS_ENC_SUPL_GSM_DEFAULT 1
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#define GPS_ENC_SUPL_UTF8 2
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#define GPS_ENC_SUPL_UCS2 3
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#define GPS_ENC_UNKNOWN -1
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/** AGPS status event values. */
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typedef uint16_t AGpsStatusValue;
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/** GPS requests data connection for AGPS. */
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#define GPS_REQUEST_AGPS_DATA_CONN 1
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/** GPS releases the AGPS data connection. */
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#define GPS_RELEASE_AGPS_DATA_CONN 2
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/** AGPS data connection initiated */
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#define GPS_AGPS_DATA_CONNECTED 3
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/** AGPS data connection completed */
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#define GPS_AGPS_DATA_CONN_DONE 4
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/** AGPS data connection failed */
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#define GPS_AGPS_DATA_CONN_FAILED 5
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#define AGPS_REF_LOCATION_TYPE_GSM_CELLID 1
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#define AGPS_REF_LOCATION_TYPE_UMTS_CELLID 2
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#define AGPS_REG_LOCATION_TYPE_MAC 3
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/** Network types for update_network_state "type" parameter */
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#define AGPS_RIL_NETWORK_TYPE_MOBILE 0
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#define AGPS_RIL_NETWORK_TYPE_WIFI 1
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#define AGPS_RIL_NETWORK_TYPE_MOBILE_MMS 2
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#define AGPS_RIL_NETWORK_TYPE_MOBILE_SUPL 3
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#define AGPS_RIL_NETWORK_TTYPE_MOBILE_DUN 4
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#define AGPS_RIL_NETWORK_TTYPE_MOBILE_HIPRI 5
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#define AGPS_RIL_NETWORK_TTYPE_WIMAX 6
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/**
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* Name for the GPS XTRA interface.
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*/
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#define GPS_XTRA_INTERFACE "gps-xtra"
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/**
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* Name for the GPS DEBUG interface.
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*/
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#define GPS_DEBUG_INTERFACE "gps-debug"
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/**
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* Name for the AGPS interface.
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*/
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#define AGPS_INTERFACE "agps"
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/**
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* Name for NI interface
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*/
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#define GPS_NI_INTERFACE "gps-ni"
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/**
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* Name for the AGPS-RIL interface.
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*/
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#define AGPS_RIL_INTERFACE "agps_ril"
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/**
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* Name for the GPS_Geofencing interface.
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*/
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#define GPS_GEOFENCING_INTERFACE "gps_geofencing"
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/**
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* The GPS chipset can use Psc for AGPS.
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*/
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#define AGPS_USE_PSC
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/** Represents a location. */
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typedef struct {
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/** set to sizeof(GpsLocation) */
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size_t size;
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/** Contains GpsLocationFlags bits. */
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uint16_t flags;
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/** Represents latitude in degrees. */
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double latitude;
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/** Represents longitude in degrees. */
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double longitude;
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/** Represents altitude in meters above the WGS 84 reference
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* ellipsoid. */
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double altitude;
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/** Represents speed in meters per second. */
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float speed;
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/** Represents heading in degrees. */
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float bearing;
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/** Represents expected accuracy in meters. */
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float accuracy;
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/** Timestamp for the location fix. */
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GpsUtcTime timestamp;
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} GpsLocation;
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/** Represents the status. */
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typedef struct {
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/** set to sizeof(GpsStatus) */
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size_t size;
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GpsStatusValue status;
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} GpsStatus;
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/** Represents SV information. */
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typedef struct {
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/** set to sizeof(GpsSvInfo) */
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size_t size;
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/** Pseudo-random number for the SV. */
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int prn;
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/** Signal to noise ratio. */
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float snr;
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/** Elevation of SV in degrees. */
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float elevation;
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/** Azimuth of SV in degrees. */
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float azimuth;
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/** Unknown field in Samsung I9100 libgps
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May be an indicator for constellation type
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(GPS, GLONASS, Galileo)?
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Used on GT-I9100, likely also present on GT-N7000,
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SGH-I717, SGH-I727 but this needs confirmation.
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*/
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int unknown_samsung_field;
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} GpsSvInfo;
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/** Represents SV status. */
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typedef struct {
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/** set to sizeof(GpsSvStatus) */
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size_t size;
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/** Number of SVs currently visible. */
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int num_svs;
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/** Contains an array of SV information. */
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GpsSvInfo sv_list[GPS_MAX_SVS];
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/** Represents a bit mask indicating which SVs
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* have ephemeris data.
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*/
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uint32_t ephemeris_mask;
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/** Represents a bit mask indicating which SVs
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* have almanac data.
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*/
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uint32_t almanac_mask;
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/**
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* Represents a bit mask indicating which SVs
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* were used for computing the most recent position fix.
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*/
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uint32_t used_in_fix_mask;
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} GpsSvStatus;
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/* 2G and 3G */
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/* In 3G lac is discarded */
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typedef struct {
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uint16_t type;
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uint16_t mcc;
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uint16_t mnc;
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uint16_t lac;
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#ifdef AGPS_USE_PSC
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uint16_t psc;
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#endif
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uint32_t cid;
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} AGpsRefLocationCellID;
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typedef struct {
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uint8_t mac[6];
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} AGpsRefLocationMac;
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/** Represents ref locations */
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typedef struct {
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uint16_t type;
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union {
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AGpsRefLocationCellID cellID;
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AGpsRefLocationMac mac;
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} u;
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} AGpsRefLocation;
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/** Callback with location information.
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* Can only be called from a thread created by create_thread_cb.
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*/
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typedef void (* gps_location_callback)(GpsLocation* location);
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/** Callback with status information.
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* Can only be called from a thread created by create_thread_cb.
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*/
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typedef void (* gps_status_callback)(GpsStatus* status);
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/** Callback with SV status information.
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* Can only be called from a thread created by create_thread_cb.
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*/
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typedef void (* gps_sv_status_callback)(GpsSvStatus* sv_info);
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/** Callback for reporting NMEA sentences.
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* Can only be called from a thread created by create_thread_cb.
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*/
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typedef void (* gps_nmea_callback)(GpsUtcTime timestamp, const char* nmea, int length);
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/** Callback to inform framework of the GPS engine's capabilities.
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* Capability parameter is a bit field of GPS_CAPABILITY_* flags.
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*/
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typedef void (* gps_set_capabilities)(uint32_t capabilities);
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/** Callback utility for acquiring the GPS wakelock.
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* This can be used to prevent the CPU from suspending while handling GPS events.
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*/
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typedef void (* gps_acquire_wakelock)();
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/** Callback utility for releasing the GPS wakelock. */
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typedef void (* gps_release_wakelock)();
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/** Callback for requesting NTP time */
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typedef void (* gps_request_utc_time)();
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/** Callback for creating a thread that can call into the Java framework code.
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* This must be used to create any threads that report events up to the framework.
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*/
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typedef pthread_t (* gps_create_thread)(const char* name, void (*start)(void *), void* arg);
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/** GPS callback structure. */
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typedef struct {
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/** set to sizeof(GpsCallbacks) */
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size_t size;
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gps_location_callback location_cb;
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gps_status_callback status_cb;
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gps_sv_status_callback sv_status_cb;
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gps_nmea_callback nmea_cb;
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gps_set_capabilities set_capabilities_cb;
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gps_acquire_wakelock acquire_wakelock_cb;
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gps_release_wakelock release_wakelock_cb;
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gps_create_thread create_thread_cb;
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gps_request_utc_time request_utc_time_cb;
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} GpsCallbacks;
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/** Represents the standard GPS interface. */
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typedef struct {
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/** set to sizeof(GpsInterface) */
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size_t size;
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/**
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* Opens the interface and provides the callback routines
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* to the implemenation of this interface.
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*/
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int (*init)( GpsCallbacks* callbacks );
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/** Starts navigating. */
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int (*start)( void );
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/** Stops navigating. */
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int (*stop)( void );
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/** Closes the interface. */
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void (*cleanup)( void );
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/** Injects the current time. */
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int (*inject_time)(GpsUtcTime time, int64_t timeReference,
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int uncertainty);
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/** Injects current location from another location provider
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* (typically cell ID).
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* latitude and longitude are measured in degrees
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* expected accuracy is measured in meters
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*/
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int (*inject_location)(double latitude, double longitude, float accuracy);
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/**
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* Specifies that the next call to start will not use the
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* information defined in the flags. GPS_DELETE_ALL is passed for
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* a cold start.
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*/
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void (*delete_aiding_data)(GpsAidingData flags);
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/**
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* min_interval represents the time between fixes in milliseconds.
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* preferred_accuracy represents the requested fix accuracy in meters.
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* preferred_time represents the requested time to first fix in milliseconds.
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*/
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int (*set_position_mode)(GpsPositionMode mode, GpsPositionRecurrence recurrence,
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uint32_t min_interval, uint32_t preferred_accuracy, uint32_t preferred_time);
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/** Get a pointer to extension information. */
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const void* (*get_extension)(const char* name);
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} GpsInterface;
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/** Callback to request the client to download XTRA data.
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* The client should download XTRA data and inject it by calling inject_xtra_data().
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* Can only be called from a thread created by create_thread_cb.
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*/
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typedef void (* gps_xtra_download_request)();
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/** Callback structure for the XTRA interface. */
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typedef struct {
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gps_xtra_download_request download_request_cb;
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gps_create_thread create_thread_cb;
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} GpsXtraCallbacks;
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/** Extended interface for XTRA support. */
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typedef struct {
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/** set to sizeof(GpsXtraInterface) */
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size_t size;
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/**
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* Opens the XTRA interface and provides the callback routines
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* to the implemenation of this interface.
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*/
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int (*init)( GpsXtraCallbacks* callbacks );
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/** Injects XTRA data into the GPS. */
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int (*inject_xtra_data)( char* data, int length );
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} GpsXtraInterface;
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/** Extended interface for DEBUG support. */
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typedef struct {
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/** set to sizeof(GpsDebugInterface) */
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size_t size;
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/**
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* This function should return any information that the native
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* implementation wishes to include in a bugreport.
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*/
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size_t (*get_internal_state)(char* buffer, size_t bufferSize);
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} GpsDebugInterface;
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/** Represents the status of AGPS. */
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typedef struct {
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/** set to sizeof(AGpsStatus) */
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size_t size;
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AGpsType type;
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AGpsStatusValue status;
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uint32_t ipaddr;
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} AGpsStatus;
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/** Callback with AGPS status information.
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* Can only be called from a thread created by create_thread_cb.
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*/
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typedef void (* agps_status_callback)(AGpsStatus* status);
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/** Callback structure for the AGPS interface. */
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typedef struct {
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agps_status_callback status_cb;
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gps_create_thread create_thread_cb;
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} AGpsCallbacks;
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/** Extended interface for AGPS support. */
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typedef struct {
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/** set to sizeof(AGpsInterface) */
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size_t size;
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/**
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* Opens the AGPS interface and provides the callback routines
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* to the implemenation of this interface.
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*/
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void (*init)( AGpsCallbacks* callbacks );
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/**
|
|
* Notifies that a data connection is available and sets
|
|
* the name of the APN to be used for SUPL.
|
|
*/
|
|
int (*data_conn_open)( const char* apn );
|
|
/**
|
|
* Notifies that the AGPS data connection has been closed.
|
|
*/
|
|
int (*data_conn_closed)();
|
|
/**
|
|
* Notifies that a data connection is not available for AGPS.
|
|
*/
|
|
int (*data_conn_failed)();
|
|
/**
|
|
* Sets the hostname and port for the AGPS server.
|
|
*/
|
|
int (*set_server)( AGpsType type, const char* hostname, int port );
|
|
} AGpsInterface;
|
|
|
|
|
|
/** Represents an NI request */
|
|
typedef struct {
|
|
/** set to sizeof(GpsNiNotification) */
|
|
size_t size;
|
|
|
|
/**
|
|
* An ID generated by HAL to associate NI notifications and UI
|
|
* responses
|
|
*/
|
|
int notification_id;
|
|
|
|
/**
|
|
* An NI type used to distinguish different categories of NI
|
|
* events, such as GPS_NI_TYPE_VOICE, GPS_NI_TYPE_UMTS_SUPL, ...
|
|
*/
|
|
GpsNiType ni_type;
|
|
|
|
/**
|
|
* Notification/verification options, combinations of GpsNiNotifyFlags constants
|
|
*/
|
|
GpsNiNotifyFlags notify_flags;
|
|
|
|
/**
|
|
* Timeout period to wait for user response.
|
|
* Set to 0 for no time out limit.
|
|
*/
|
|
int timeout;
|
|
|
|
/**
|
|
* Default response when time out.
|
|
*/
|
|
GpsUserResponseType default_response;
|
|
|
|
/**
|
|
* Requestor ID
|
|
*/
|
|
char requestor_id[GPS_NI_SHORT_STRING_MAXLEN];
|
|
|
|
/**
|
|
* Notification message. It can also be used to store client_id in some cases
|
|
*/
|
|
char text[GPS_NI_LONG_STRING_MAXLEN];
|
|
|
|
/**
|
|
* Client name decoding scheme
|
|
*/
|
|
GpsNiEncodingType requestor_id_encoding;
|
|
|
|
/**
|
|
* Client name decoding scheme
|
|
*/
|
|
GpsNiEncodingType text_encoding;
|
|
|
|
/**
|
|
* A pointer to extra data. Format:
|
|
* key_1 = value_1
|
|
* key_2 = value_2
|
|
*/
|
|
char extras[GPS_NI_LONG_STRING_MAXLEN];
|
|
|
|
} GpsNiNotification;
|
|
|
|
/** Callback with NI notification.
|
|
* Can only be called from a thread created by create_thread_cb.
|
|
*/
|
|
typedef void (*gps_ni_notify_callback)(GpsNiNotification *notification);
|
|
|
|
/** GPS NI callback structure. */
|
|
typedef struct
|
|
{
|
|
/**
|
|
* Sends the notification request from HAL to GPSLocationProvider.
|
|
*/
|
|
gps_ni_notify_callback notify_cb;
|
|
gps_create_thread create_thread_cb;
|
|
} GpsNiCallbacks;
|
|
|
|
/**
|
|
* Extended interface for Network-initiated (NI) support.
|
|
*/
|
|
typedef struct
|
|
{
|
|
/** set to sizeof(GpsNiInterface) */
|
|
size_t size;
|
|
|
|
/** Registers the callbacks for HAL to use. */
|
|
void (*init) (GpsNiCallbacks *callbacks);
|
|
|
|
/** Sends a response to HAL. */
|
|
void (*respond) (int notif_id, GpsUserResponseType user_response);
|
|
} GpsNiInterface;
|
|
|
|
struct gps_device_t {
|
|
struct hw_device_t common;
|
|
|
|
/**
|
|
* Set the provided lights to the provided values.
|
|
*
|
|
* Returns: 0 on succes, error code on failure.
|
|
*/
|
|
const GpsInterface* (*get_gps_interface)(struct gps_device_t* dev);
|
|
};
|
|
|
|
#define AGPS_RIL_REQUEST_SETID_IMSI (1<<0L)
|
|
#define AGPS_RIL_REQUEST_SETID_MSISDN (1<<1L)
|
|
|
|
#define AGPS_RIL_REQUEST_REFLOC_CELLID (1<<0L)
|
|
#define AGPS_RIL_REQUEST_REFLOC_MAC (1<<1L)
|
|
|
|
typedef void (*agps_ril_request_set_id)(uint32_t flags);
|
|
typedef void (*agps_ril_request_ref_loc)(uint32_t flags);
|
|
|
|
typedef struct {
|
|
agps_ril_request_set_id request_setid;
|
|
agps_ril_request_ref_loc request_refloc;
|
|
gps_create_thread create_thread_cb;
|
|
} AGpsRilCallbacks;
|
|
|
|
/** Extended interface for AGPS_RIL support. */
|
|
typedef struct {
|
|
/** set to sizeof(AGpsRilInterface) */
|
|
size_t size;
|
|
/**
|
|
* Opens the AGPS interface and provides the callback routines
|
|
* to the implemenation of this interface.
|
|
*/
|
|
void (*init)( AGpsRilCallbacks* callbacks );
|
|
|
|
/**
|
|
* Sets the reference location.
|
|
*/
|
|
void (*set_ref_location) (const AGpsRefLocation *agps_reflocation, size_t sz_struct);
|
|
/**
|
|
* Sets the set ID.
|
|
*/
|
|
void (*set_set_id) (AGpsSetIDType type, const char* setid);
|
|
|
|
/**
|
|
* Send network initiated message.
|
|
*/
|
|
void (*ni_message) (uint8_t *msg, size_t len);
|
|
|
|
/**
|
|
* Notify GPS of network status changes.
|
|
* These parameters match values in the android.net.NetworkInfo class.
|
|
*/
|
|
void (*update_network_state) (int connected, int type, int roaming, const char* extra_info);
|
|
|
|
/**
|
|
* Notify GPS of network status changes.
|
|
* These parameters match values in the android.net.NetworkInfo class.
|
|
*/
|
|
void (*update_network_availability) (int avaiable, const char* apn);
|
|
} AGpsRilInterface;
|
|
|
|
/**
|
|
* GPS Geofence.
|
|
* There are 3 states associated with a Geofence: Inside, Outside, Unknown.
|
|
* There are 3 transitions: ENTERED, EXITED, UNCERTAIN.
|
|
*
|
|
* An example state diagram with confidence level: 95% and Unknown time limit
|
|
* set as 30 secs is shown below. (confidence level and Unknown time limit are
|
|
* explained latter)
|
|
* ____________________________
|
|
* | Unknown (30 secs) |
|
|
* """"""""""""""""""""""""""""
|
|
* ^ | | ^
|
|
* UNCERTAIN| |ENTERED EXITED| |UNCERTAIN
|
|
* | v v |
|
|
* ________ EXITED _________
|
|
* | Inside | -----------> | Outside |
|
|
* | | <----------- | |
|
|
* """""""" ENTERED """""""""
|
|
*
|
|
* Inside state: We are 95% confident that the user is inside the geofence.
|
|
* Outside state: We are 95% confident that the user is outside the geofence
|
|
* Unknown state: Rest of the time.
|
|
*
|
|
* The Unknown state is better explained with an example:
|
|
*
|
|
* __________
|
|
* | c|
|
|
* | ___ | _______
|
|
* | |a| | | b |
|
|
* | """ | """""""
|
|
* | |
|
|
* """"""""""
|
|
* In the diagram above, "a" and "b" are 2 geofences and "c" is the accuracy
|
|
* circle reported by the GPS subsystem. Now with regard to "b", the system is
|
|
* confident that the user is outside. But with regard to "a" is not confident
|
|
* whether it is inside or outside the geofence. If the accuracy remains the
|
|
* same for a sufficient period of time, the UNCERTAIN transition would be
|
|
* triggered with the state set to Unknown. If the accuracy improves later, an
|
|
* appropriate transition should be triggered. This "sufficient period of time"
|
|
* is defined by the parameter in the add_geofence_area API.
|
|
* In other words, Unknown state can be interpreted as a state in which the
|
|
* GPS subsystem isn't confident enough that the user is either inside or
|
|
* outside the Geofence. It moves to Unknown state only after the expiry of the
|
|
* timeout.
|
|
*
|
|
* The geofence callback needs to be triggered for the ENTERED and EXITED
|
|
* transitions, when the GPS system is confident that the user has entered
|
|
* (Inside state) or exited (Outside state) the Geofence. An implementation
|
|
* which uses a value of 95% as the confidence is recommended. The callback
|
|
* should be triggered only for the transitions requested by the
|
|
* add_geofence_area call.
|
|
*
|
|
* Even though the diagram and explanation talks about states and transitions,
|
|
* the callee is only interested in the transistions. The states are mentioned
|
|
* here for illustrative purposes.
|
|
*
|
|
* Startup Scenario: When the device boots up, if an application adds geofences,
|
|
* and then we get an accurate GPS location fix, it needs to trigger the
|
|
* appropriate (ENTERED or EXITED) transition for every Geofence it knows about.
|
|
* By default, all the Geofences will be in the Unknown state.
|
|
*
|
|
* When the GPS system is unavailable, gps_geofence_status_callback should be
|
|
* called to inform the upper layers of the same. Similarly, when it becomes
|
|
* available the callback should be called. This is a global state while the
|
|
* UNKNOWN transition described above is per geofence.
|
|
*
|
|
* An important aspect to note is that users of this API (framework), will use
|
|
* other subsystems like wifi, sensors, cell to handle Unknown case and
|
|
* hopefully provide a definitive state transition to the third party
|
|
* application. GPS Geofence will just be a signal indicating what the GPS
|
|
* subsystem knows about the Geofence.
|
|
*
|
|
*/
|
|
#define GPS_GEOFENCE_ENTERED (1<<0L)
|
|
#define GPS_GEOFENCE_EXITED (1<<1L)
|
|
#define GPS_GEOFENCE_UNCERTAIN (1<<2L)
|
|
|
|
#define GPS_GEOFENCE_UNAVAILABLE (1<<0L)
|
|
#define GPS_GEOFENCE_AVAILABLE (1<<1L)
|
|
|
|
#define GPS_GEOFENCE_OPERATION_SUCCESS 0
|
|
#define GPS_GEOFENCE_ERROR_TOO_MANY_GEOFENCES -100
|
|
#define GPS_GEOFENCE_ERROR_ID_EXISTS -101
|
|
#define GPS_GEOFENCE_ERROR_ID_UNKNOWN -102
|
|
#define GPS_GEOFENCE_ERROR_INVALID_TRANSITION -103
|
|
#define GPS_GEOFENCE_ERROR_GENERIC -149
|
|
|
|
/**
|
|
* The callback associated with the geofence.
|
|
* Parameters:
|
|
* geofence_id - The id associated with the add_geofence_area.
|
|
* location - The current GPS location.
|
|
* transition - Can be one of GPS_GEOFENCE_ENTERED, GPS_GEOFENCE_EXITED,
|
|
* GPS_GEOFENCE_UNCERTAIN.
|
|
* timestamp - Timestamp when the transition was detected.
|
|
*
|
|
* The callback should only be called when the caller is interested in that
|
|
* particular transition. For instance, if the caller is interested only in
|
|
* ENTERED transition, then the callback should NOT be called with the EXITED
|
|
* transition.
|
|
*
|
|
* IMPORTANT: If a transition is triggered resulting in this callback, the GPS
|
|
* subsystem will wake up the application processor, if its in suspend state.
|
|
*/
|
|
typedef void (*gps_geofence_transition_callback) (int32_t geofence_id, GpsLocation* location,
|
|
int32_t transition, GpsUtcTime timestamp);
|
|
|
|
/**
|
|
* The callback associated with the availablity of the GPS system for geofencing
|
|
* monitoring. If the GPS system determines that it cannot monitor geofences
|
|
* because of lack of reliability or unavailability of the GPS signals, it will
|
|
* call this callback with GPS_GEOFENCE_UNAVAILABLE parameter.
|
|
*
|
|
* Parameters:
|
|
* status - GPS_GEOFENCE_UNAVAILABLE or GPS_GEOFENCE_AVAILABLE.
|
|
* last_location - Last known location.
|
|
*/
|
|
typedef void (*gps_geofence_status_callback) (int32_t status, GpsLocation* last_location);
|
|
|
|
/**
|
|
* The callback associated with the add_geofence call.
|
|
*
|
|
* Parameter:
|
|
* geofence_id - Id of the geofence.
|
|
* status - GPS_GEOFENCE_OPERATION_SUCCESS
|
|
* GPS_GEOFENCE_ERROR_TOO_MANY_GEOFENCES - geofence limit has been reached.
|
|
* GPS_GEOFENCE_ERROR_ID_EXISTS - geofence with id already exists
|
|
* GPS_GEOFENCE_ERROR_INVALID_TRANSITION - the monitorTransition contains an
|
|
* invalid transition
|
|
* GPS_GEOFENCE_ERROR_GENERIC - for other errors.
|
|
*/
|
|
typedef void (*gps_geofence_add_callback) (int32_t geofence_id, int32_t status);
|
|
|
|
/**
|
|
* The callback associated with the remove_geofence call.
|
|
*
|
|
* Parameter:
|
|
* geofence_id - Id of the geofence.
|
|
* status - GPS_GEOFENCE_OPERATION_SUCCESS
|
|
* GPS_GEOFENCE_ERROR_ID_UNKNOWN - for invalid id
|
|
* GPS_GEOFENCE_ERROR_GENERIC for others.
|
|
*/
|
|
typedef void (*gps_geofence_remove_callback) (int32_t geofence_id, int32_t status);
|
|
|
|
|
|
/**
|
|
* The callback associated with the pause_geofence call.
|
|
*
|
|
* Parameter:
|
|
* geofence_id - Id of the geofence.
|
|
* status - GPS_GEOFENCE_OPERATION_SUCCESS
|
|
* GPS_GEOFENCE_ERROR_ID_UNKNOWN - for invalid id
|
|
* GPS_GEOFENCE_ERROR_INVALID_TRANSITION -
|
|
* when monitor_transitions is invalid
|
|
* GPS_GEOFENCE_ERROR_GENERIC for others.
|
|
*/
|
|
typedef void (*gps_geofence_pause_callback) (int32_t geofence_id, int32_t status);
|
|
|
|
/**
|
|
* The callback associated with the resume_geofence call.
|
|
*
|
|
* Parameter:
|
|
* geofence_id - Id of the geofence.
|
|
* status - GPS_GEOFENCE_OPERATION_SUCCESS
|
|
* GPS_GEOFENCE_ERROR_ID_UNKNOWN - for invalid id
|
|
* GPS_GEOFENCE_ERROR_GENERIC for others.
|
|
*/
|
|
typedef void (*gps_geofence_resume_callback) (int32_t geofence_id, int32_t status);
|
|
|
|
typedef struct {
|
|
gps_geofence_transition_callback geofence_transition_callback;
|
|
gps_geofence_status_callback geofence_status_callback;
|
|
gps_geofence_add_callback geofence_add_callback;
|
|
gps_geofence_remove_callback geofence_remove_callback;
|
|
gps_geofence_pause_callback geofence_pause_callback;
|
|
gps_geofence_resume_callback geofence_resume_callback;
|
|
gps_create_thread create_thread_cb;
|
|
} GpsGeofenceCallbacks;
|
|
|
|
/** Extended interface for GPS_Geofencing support */
|
|
typedef struct {
|
|
/** set to sizeof(GpsGeofencingInterface) */
|
|
size_t size;
|
|
|
|
/**
|
|
* Opens the geofence interface and provides the callback routines
|
|
* to the implemenation of this interface.
|
|
*/
|
|
void (*init)( GpsGeofenceCallbacks* callbacks );
|
|
|
|
/**
|
|
* Add a geofence area. This api currently supports circular geofences.
|
|
* Parameters:
|
|
* geofence_id - The id for the geofence. If a geofence with this id
|
|
* already exists, an error value (GPS_GEOFENCE_ERROR_ID_EXISTS)
|
|
* should be returned.
|
|
* latitude, longtitude, radius_meters - The lat, long and radius
|
|
* (in meters) for the geofence
|
|
* last_transition - The current state of the geofence. For example, if
|
|
* the system already knows that the user is inside the geofence,
|
|
* this will be set to GPS_GEOFENCE_ENTERED. In most cases, it
|
|
* will be GPS_GEOFENCE_UNCERTAIN.
|
|
* monitor_transition - Which transitions to monitor. Bitwise OR of
|
|
* GPS_GEOFENCE_ENTERED, GPS_GEOFENCE_EXITED and
|
|
* GPS_GEOFENCE_UNCERTAIN.
|
|
* notification_responsiveness_ms - Defines the best-effort description
|
|
* of how soon should the callback be called when the transition
|
|
* associated with the Geofence is triggered. For instance, if set
|
|
* to 1000 millseconds with GPS_GEOFENCE_ENTERED, the callback
|
|
* should be called 1000 milliseconds within entering the geofence.
|
|
* This parameter is defined in milliseconds.
|
|
* NOTE: This is not to be confused with the rate that the GPS is
|
|
* polled at. It is acceptable to dynamically vary the rate of
|
|
* sampling the GPS for power-saving reasons; thus the rate of
|
|
* sampling may be faster or slower than this.
|
|
* unknown_timer_ms - The time limit after which the UNCERTAIN transition
|
|
* should be triggered. This paramter is defined in milliseconds.
|
|
* See above for a detailed explanation.
|
|
*/
|
|
void (*add_geofence_area) (int32_t geofence_id, double latitude,
|
|
double longitude, double radius_meters,
|
|
int last_transition, int monitor_transitions,
|
|
int notification_responsiveness_ms,
|
|
int unknown_timer_ms);
|
|
|
|
/**
|
|
* Pause monitoring a particular geofence.
|
|
* Parameters:
|
|
* geofence_id - The id for the geofence.
|
|
*/
|
|
void (*pause_geofence) (int32_t geofence_id);
|
|
|
|
/**
|
|
* Resume monitoring a particular geofence.
|
|
* Parameters:
|
|
* geofence_id - The id for the geofence.
|
|
* monitor_transitions - Which transitions to monitor. Bitwise OR of
|
|
* GPS_GEOFENCE_ENTERED, GPS_GEOFENCE_EXITED and
|
|
* GPS_GEOFENCE_UNCERTAIN.
|
|
* This supersedes the value associated provided in the
|
|
* add_geofence_area call.
|
|
*/
|
|
void (*resume_geofence) (int32_t geofence_id, int monitor_transitions);
|
|
|
|
/**
|
|
* Remove a geofence area. After the function returns, no notifications
|
|
* should be sent.
|
|
* Parameter:
|
|
* geofence_id - The id for the geofence.
|
|
*/
|
|
void (*remove_geofence_area) (int32_t geofence_id);
|
|
} GpsGeofencingInterface;
|
|
__END_DECLS
|
|
|
|
#endif /* ANDROID_INCLUDE_HARDWARE_GPS_H */
|
|
|