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Diffstat (limited to 'utils/loc_gps.h')
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diff --git a/utils/loc_gps.h b/utils/loc_gps.h new file mode 100644 index 0000000..eae7383 --- /dev/null +++ b/utils/loc_gps.h @@ -0,0 +1,2229 @@ +/* + * Copyright (C) 2010 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. + */ + +#ifndef LOC_GPS_H +#define LOC_GPS_H + +#include <stdint.h> +#include <sys/cdefs.h> +#include <sys/types.h> +#include <pthread.h> +#include <sys/socket.h> +#include <stdbool.h> + +__BEGIN_DECLS + +#define LOC_FLP_STATUS_LOCATION_AVAILABLE 0 +#define LOC_FLP_STATUS_LOCATION_UNAVAILABLE 1 +#define LOC_CAPABILITY_GNSS (1U<<0) +#define LOC_CAPABILITY_WIFI (1U<<1) +#define LOC_CAPABILITY_CELL (1U<<3) + +/** Milliseconds since January 1, 1970 */ +typedef int64_t LocGpsUtcTime; + +/** Maximum number of SVs for loc_gps_sv_status_callback(). */ +#define LOC_GPS_MAX_SVS 32 +/** Maximum number of SVs for loc_gps_sv_status_callback(). */ +#define LOC_GNSS_MAX_SVS 64 + +/** Maximum number of Measurements in loc_gps_measurement_callback(). */ +#define LOC_GPS_MAX_MEASUREMENT 32 + +/** Maximum number of Measurements in loc_gnss_measurement_callback(). */ +#define LOC_GNSS_MAX_MEASUREMENT 64 + +/** Requested operational mode for GPS operation. */ +typedef uint32_t LocGpsPositionMode; +/* IMPORTANT: Note that the following values must match + * constants in GpsLocationProvider.java. */ +/** Mode for running GPS standalone (no assistance). */ +#define LOC_GPS_POSITION_MODE_STANDALONE 0 +/** AGPS MS-Based mode. */ +#define LOC_GPS_POSITION_MODE_MS_BASED 1 +/** + * AGPS MS-Assisted mode. This mode is not maintained by the platform anymore. + * It is strongly recommended to use LOC_GPS_POSITION_MODE_MS_BASED instead. + */ +#define LOC_GPS_POSITION_MODE_MS_ASSISTED 2 + +/** Requested recurrence mode for GPS operation. */ +typedef uint32_t LocGpsPositionRecurrence; +/* IMPORTANT: Note that the following values must match + * constants in GpsLocationProvider.java. */ +/** Receive GPS fixes on a recurring basis at a specified period. */ +#define LOC_GPS_POSITION_RECURRENCE_PERIODIC 0 +/** Request a single shot GPS fix. */ +#define LOC_GPS_POSITION_RECURRENCE_SINGLE 1 + +/** GPS status event values. */ +typedef uint16_t LocGpsStatusValue; +/* IMPORTANT: Note that the following values must match + * constants in GpsLocationProvider.java. */ +/** GPS status unknown. */ +#define LOC_GPS_STATUS_NONE 0 +/** GPS has begun navigating. */ +#define LOC_GPS_STATUS_SESSION_BEGIN 1 +/** GPS has stopped navigating. */ +#define LOC_GPS_STATUS_SESSION_END 2 +/** GPS has powered on but is not navigating. */ +#define LOC_GPS_STATUS_ENGINE_ON 3 +/** GPS is powered off. */ +#define LOC_GPS_STATUS_ENGINE_OFF 4 + +/** Flags to indicate which values are valid in a LocGpsLocation. */ +typedef uint16_t LocGpsLocationFlags; +/* IMPORTANT: Note that the following values must match + * constants in GpsLocationProvider.java. */ +/** LocGpsLocation has valid latitude and longitude. */ +#define LOC_GPS_LOCATION_HAS_LAT_LONG 0x0001 +/** LocGpsLocation has valid altitude. */ +#define LOC_GPS_LOCATION_HAS_ALTITUDE 0x0002 +/** LocGpsLocation has valid speed. */ +#define LOC_GPS_LOCATION_HAS_SPEED 0x0004 +/** LocGpsLocation has valid bearing. */ +#define LOC_GPS_LOCATION_HAS_BEARING 0x0008 +/** LocGpsLocation has valid accuracy. */ +#define LOC_GPS_LOCATION_HAS_ACCURACY 0x0010 +/** LocGpsLocation has valid vertical uncertainity */ +#define LOC_GPS_LOCATION_HAS_VERT_UNCERTAINITY 0x0040 +/** LocGpsLocation has valid spoof mask */ +#define LOC_GPS_LOCATION_HAS_SPOOF_MASK 0x0080 +/** LocGpsLocation has valid speed accuracy */ +#define LOC_GPS_LOCATION_HAS_SPEED_ACCURACY 0x0100 +/** LocGpsLocation has valid bearing accuracy */ +#define LOC_GPS_LOCATION_HAS_BEARING_ACCURACY 0x0200 + +/** Spoof mask in LocGpsLocation */ +typedef uint32_t LocGpsSpoofMask; +#define LOC_GPS_LOCATION_NONE_SPOOFED 0x0000 +#define LOC_GPS_LOCATION_POSITION_SPOOFED 0x0001 +#define LOC_GPS_LOCATION_TIME_SPOOFED 0x0002 +#define LOC_GPS_LOCATION_NAVIGATION_DATA_SPOOFED 0x0004 + +/** Flags for the loc_gps_set_capabilities callback. */ + +/** + * GPS HAL schedules fixes for LOC_GPS_POSITION_RECURRENCE_PERIODIC mode. If this is + * not set, then the framework will use 1000ms for min_interval and will start + * and call start() and stop() to schedule the GPS. + */ +#define LOC_GPS_CAPABILITY_SCHEDULING (1 << 0) +/** GPS supports MS-Based AGPS mode */ +#define LOC_GPS_CAPABILITY_MSB (1 << 1) +/** GPS supports MS-Assisted AGPS mode */ +#define LOC_GPS_CAPABILITY_MSA (1 << 2) +/** GPS supports single-shot fixes */ +#define LOC_GPS_CAPABILITY_SINGLE_SHOT (1 << 3) +/** GPS supports on demand time injection */ +#define LOC_GPS_CAPABILITY_ON_DEMAND_TIME (1 << 4) +/** GPS supports Geofencing */ +#define LOC_GPS_CAPABILITY_GEOFENCING (1 << 5) +/** GPS supports Measurements. */ +#define LOC_GPS_CAPABILITY_MEASUREMENTS (1 << 6) +/** GPS supports Navigation Messages */ +#define LOC_GPS_CAPABILITY_NAV_MESSAGES (1 << 7) + +/** + * Flags used to specify which aiding data to delete when calling + * delete_aiding_data(). + */ +typedef uint16_t LocGpsAidingData; +/* IMPORTANT: Note that the following values must match + * constants in GpsLocationProvider.java. */ +#define LOC_GPS_DELETE_EPHEMERIS 0x0001 +#define LOC_GPS_DELETE_ALMANAC 0x0002 +#define LOC_GPS_DELETE_POSITION 0x0004 +#define LOC_GPS_DELETE_TIME 0x0008 +#define LOC_GPS_DELETE_IONO 0x0010 +#define LOC_GPS_DELETE_UTC 0x0020 +#define LOC_GPS_DELETE_HEALTH 0x0040 +#define LOC_GPS_DELETE_SVDIR 0x0080 +#define LOC_GPS_DELETE_SVSTEER 0x0100 +#define LOC_GPS_DELETE_SADATA 0x0200 +#define LOC_GPS_DELETE_RTI 0x0400 +#define LOC_GPS_DELETE_MB_DATA 0x0800 +#define LOC_GPS_DELETE_CELLDB_INFO 0x8000 +#define LOC_GPS_DELETE_ALL 0xFFFF + +/** AGPS type */ +typedef uint16_t LocAGpsType; +#define LOC_AGPS_TYPE_ANY 0 +#define LOC_AGPS_TYPE_SUPL 1 +#define LOC_AGPS_TYPE_C2K 2 +#define LOC_AGPS_TYPE_WWAN_ANY 3 +#define LOC_AGPS_TYPE_WIFI 4 +#define LOC_AGPS_TYPE_SUPL_ES 5 + +typedef uint16_t LocAGpsSetIDType; +#define LOC_AGPS_SETID_TYPE_NONE 0 +#define LOC_AGPS_SETID_TYPE_IMSI 1 +#define LOC_AGPS_SETID_TYPE_MSISDN 2 + +typedef uint16_t LocApnIpType; +#define LOC_APN_IP_INVALID 0 +#define LOC_APN_IP_IPV4 1 +#define LOC_APN_IP_IPV6 2 +#define LOC_APN_IP_IPV4V6 3 + +/** + * String length constants + */ +#define LOC_GPS_NI_SHORT_STRING_MAXLEN 256 +#define LOC_GPS_NI_LONG_STRING_MAXLEN 2048 + +/** + * LocGpsNiType constants + */ +typedef uint32_t LocGpsNiType; +#define LOC_GPS_NI_TYPE_VOICE 1 +#define LOC_GPS_NI_TYPE_UMTS_SUPL 2 +#define LOC_GPS_NI_TYPE_UMTS_CTRL_PLANE 3 +/*Emergency SUPL*/ +#define LOC_GPS_NI_TYPE_EMERGENCY_SUPL 4 + +/** + * LocGpsNiNotifyFlags constants + */ +typedef uint32_t LocGpsNiNotifyFlags; +/** NI requires notification */ +#define LOC_GPS_NI_NEED_NOTIFY 0x0001 +/** NI requires verification */ +#define LOC_GPS_NI_NEED_VERIFY 0x0002 +/** NI requires privacy override, no notification/minimal trace */ +#define LOC_GPS_NI_PRIVACY_OVERRIDE 0x0004 + +/** + * GPS NI responses, used to define the response in + * NI structures + */ +typedef int LocGpsUserResponseType; +#define LOC_GPS_NI_RESPONSE_ACCEPT 1 +#define LOC_GPS_NI_RESPONSE_DENY 2 +#define LOC_GPS_NI_RESPONSE_NORESP 3 + +/** + * NI data encoding scheme + */ +typedef int LocGpsNiEncodingType; +#define LOC_GPS_ENC_NONE 0 +#define LOC_GPS_ENC_SUPL_GSM_DEFAULT 1 +#define LOC_GPS_ENC_SUPL_UTF8 2 +#define LOC_GPS_ENC_SUPL_UCS2 3 +#define LOC_GPS_ENC_UNKNOWN -1 + +/** AGPS status event values. */ +typedef uint8_t LocAGpsStatusValue; +/** GPS requests data connection for AGPS. */ +#define LOC_GPS_REQUEST_AGPS_DATA_CONN 1 +/** GPS releases the AGPS data connection. */ +#define LOC_GPS_RELEASE_AGPS_DATA_CONN 2 +/** AGPS data connection initiated */ +#define LOC_GPS_AGPS_DATA_CONNECTED 3 +/** AGPS data connection completed */ +#define LOC_GPS_AGPS_DATA_CONN_DONE 4 +/** AGPS data connection failed */ +#define LOC_GPS_AGPS_DATA_CONN_FAILED 5 + +typedef uint16_t LocAGpsRefLocationType; +#define LOC_AGPS_REF_LOCATION_TYPE_GSM_CELLID 1 +#define LOC_AGPS_REF_LOCATION_TYPE_UMTS_CELLID 2 +#define LOC_AGPS_REF_LOCATION_TYPE_MAC 3 +#define LOC_AGPS_REF_LOCATION_TYPE_LTE_CELLID 4 + +/* Deprecated, to be removed in the next Android release. */ +#define LOC_AGPS_REG_LOCATION_TYPE_MAC 3 + +/** Network types for update_network_state "type" parameter */ +#define LOC_AGPS_RIL_NETWORK_TYPE_MOBILE 0 +#define LOC_AGPS_RIL_NETWORK_TYPE_WIFI 1 +#define LOC_AGPS_RIL_NETWORK_TYPE_MOBILE_MMS 2 +#define LOC_AGPS_RIL_NETWORK_TYPE_MOBILE_SUPL 3 +#define LOC_AGPS_RIL_NETWORK_TTYPE_MOBILE_DUN 4 +#define LOC_AGPS_RIL_NETWORK_TTYPE_MOBILE_HIPRI 5 +#define LOC_AGPS_RIL_NETWORK_TTYPE_WIMAX 6 + +/* The following typedef together with its constants below are deprecated, and + * will be removed in the next release. */ +typedef uint16_t LocGpsClockFlags; +#define LOC_GPS_CLOCK_HAS_LEAP_SECOND (1<<0) +#define LOC_GPS_CLOCK_HAS_TIME_UNCERTAINTY (1<<1) +#define LOC_GPS_CLOCK_HAS_FULL_BIAS (1<<2) +#define LOC_GPS_CLOCK_HAS_BIAS (1<<3) +#define LOC_GPS_CLOCK_HAS_BIAS_UNCERTAINTY (1<<4) +#define LOC_GPS_CLOCK_HAS_DRIFT (1<<5) +#define LOC_GPS_CLOCK_HAS_DRIFT_UNCERTAINTY (1<<6) + +/** + * Flags to indicate what fields in LocGnssClock are valid. + */ +typedef uint16_t LocGnssClockFlags; +/** A valid 'leap second' is stored in the data structure. */ +#define LOC_GNSS_CLOCK_HAS_LEAP_SECOND (1<<0) +/** A valid 'time uncertainty' is stored in the data structure. */ +#define LOC_GNSS_CLOCK_HAS_TIME_UNCERTAINTY (1<<1) +/** A valid 'full bias' is stored in the data structure. */ +#define LOC_GNSS_CLOCK_HAS_FULL_BIAS (1<<2) +/** A valid 'bias' is stored in the data structure. */ +#define LOC_GNSS_CLOCK_HAS_BIAS (1<<3) +/** A valid 'bias uncertainty' is stored in the data structure. */ +#define LOC_GNSS_CLOCK_HAS_BIAS_UNCERTAINTY (1<<4) +/** A valid 'drift' is stored in the data structure. */ +#define LOC_GNSS_CLOCK_HAS_DRIFT (1<<5) +/** A valid 'drift uncertainty' is stored in the data structure. */ +#define LOC_GNSS_CLOCK_HAS_DRIFT_UNCERTAINTY (1<<6) + +/* The following typedef together with its constants below are deprecated, and + * will be removed in the next release. */ +typedef uint8_t LocGpsClockType; +#define LOC_GPS_CLOCK_TYPE_UNKNOWN 0 +#define LOC_GPS_CLOCK_TYPE_LOCAL_HW_TIME 1 +#define LOC_GPS_CLOCK_TYPE_GPS_TIME 2 + +/* The following typedef together with its constants below are deprecated, and + * will be removed in the next release. */ +typedef uint32_t LocGpsMeasurementFlags; +#define LOC_GPS_MEASUREMENT_HAS_SNR (1<<0) +#define LOC_GPS_MEASUREMENT_HAS_ELEVATION (1<<1) +#define LOC_GPS_MEASUREMENT_HAS_ELEVATION_UNCERTAINTY (1<<2) +#define LOC_GPS_MEASUREMENT_HAS_AZIMUTH (1<<3) +#define LOC_GPS_MEASUREMENT_HAS_AZIMUTH_UNCERTAINTY (1<<4) +#define LOC_GPS_MEASUREMENT_HAS_PSEUDORANGE (1<<5) +#define LOC_GPS_MEASUREMENT_HAS_PSEUDORANGE_UNCERTAINTY (1<<6) +#define LOC_GPS_MEASUREMENT_HAS_CODE_PHASE (1<<7) +#define LOC_GPS_MEASUREMENT_HAS_CODE_PHASE_UNCERTAINTY (1<<8) +#define LOC_GPS_MEASUREMENT_HAS_CARRIER_FREQUENCY (1<<9) +#define LOC_GPS_MEASUREMENT_HAS_CARRIER_CYCLES (1<<10) +#define LOC_GPS_MEASUREMENT_HAS_CARRIER_PHASE (1<<11) +#define LOC_GPS_MEASUREMENT_HAS_CARRIER_PHASE_UNCERTAINTY (1<<12) +#define LOC_GPS_MEASUREMENT_HAS_BIT_NUMBER (1<<13) +#define LOC_GPS_MEASUREMENT_HAS_TIME_FROM_LAST_BIT (1<<14) +#define LOC_GPS_MEASUREMENT_HAS_DOPPLER_SHIFT (1<<15) +#define LOC_GPS_MEASUREMENT_HAS_DOPPLER_SHIFT_UNCERTAINTY (1<<16) +#define LOC_GPS_MEASUREMENT_HAS_USED_IN_FIX (1<<17) +#define LOC_GPS_MEASUREMENT_HAS_UNCORRECTED_PSEUDORANGE_RATE (1<<18) + +/** + * Flags to indicate what fields in LocGnssMeasurement are valid. + */ +typedef uint32_t LocGnssMeasurementFlags; +/** A valid 'snr' is stored in the data structure. */ +#define LOC_GNSS_MEASUREMENT_HAS_SNR (1<<0) +/** A valid 'carrier frequency' is stored in the data structure. */ +#define LOC_GNSS_MEASUREMENT_HAS_CARRIER_FREQUENCY (1<<9) +/** A valid 'carrier cycles' is stored in the data structure. */ +#define LOC_GNSS_MEASUREMENT_HAS_CARRIER_CYCLES (1<<10) +/** A valid 'carrier phase' is stored in the data structure. */ +#define LOC_GNSS_MEASUREMENT_HAS_CARRIER_PHASE (1<<11) +/** A valid 'carrier phase uncertainty' is stored in the data structure. */ +#define LOC_GNSS_MEASUREMENT_HAS_CARRIER_PHASE_UNCERTAINTY (1<<12) + +/* The following typedef together with its constants below are deprecated, and + * will be removed in the next release. */ +typedef uint8_t LocGpsLossOfLock; +#define LOC_GPS_LOSS_OF_LOCK_UNKNOWN 0 +#define LOC_GPS_LOSS_OF_LOCK_OK 1 +#define LOC_GPS_LOSS_OF_LOCK_CYCLE_SLIP 2 + +/* The following typedef together with its constants below are deprecated, and + * will be removed in the next release. Use LocGnssMultipathIndicator instead. + */ +typedef uint8_t LocGpsMultipathIndicator; +#define LOC_GPS_MULTIPATH_INDICATOR_UNKNOWN 0 +#define LOC_GPS_MULTIPATH_INDICATOR_DETECTED 1 +#define LOC_GPS_MULTIPATH_INDICATOR_NOT_USED 2 + +/** + * Enumeration of available values for the GNSS Measurement's multipath + * indicator. + */ +typedef uint8_t LocGnssMultipathIndicator; +/** The indicator is not available or unknown. */ +#define LOC_GNSS_MULTIPATH_INDICATOR_UNKNOWN 0 +/** The measurement is indicated to be affected by multipath. */ +#define LOC_GNSS_MULTIPATH_INDICATOR_PRESENT 1 +/** The measurement is indicated to be not affected by multipath. */ +#define LOC_GNSS_MULTIPATH_INDICATOR_NOT_PRESENT 2 + +/* The following typedef together with its constants below are deprecated, and + * will be removed in the next release. */ +typedef uint16_t LocGpsMeasurementState; +#define LOC_GPS_MEASUREMENT_STATE_UNKNOWN 0 +#define LOC_GPS_MEASUREMENT_STATE_CODE_LOCK (1<<0) +#define LOC_GPS_MEASUREMENT_STATE_BIT_SYNC (1<<1) +#define LOC_GPS_MEASUREMENT_STATE_SUBFRAME_SYNC (1<<2) +#define LOC_GPS_MEASUREMENT_STATE_TOW_DECODED (1<<3) +#define LOC_GPS_MEASUREMENT_STATE_MSEC_AMBIGUOUS (1<<4) + +/** + * Flags indicating the GNSS measurement state. + * + * The expected behavior here is for GPS HAL to set all the flags that applies. + * For example, if the state for a satellite is only C/A code locked and bit + * synchronized, and there is still millisecond ambiguity, the state should be + * set as: + * + * LOC_GNSS_MEASUREMENT_STATE_CODE_LOCK | LOC_GNSS_MEASUREMENT_STATE_BIT_SYNC | + * LOC_GNSS_MEASUREMENT_STATE_MSEC_AMBIGUOUS + * + * If GNSS is still searching for a satellite, the corresponding state should be + * set to LOC_GNSS_MEASUREMENT_STATE_UNKNOWN(0). + */ +typedef uint32_t LocGnssMeasurementState; +#define LOC_GNSS_MEASUREMENT_STATE_UNKNOWN 0 +#define LOC_GNSS_MEASUREMENT_STATE_CODE_LOCK (1<<0) +#define LOC_GNSS_MEASUREMENT_STATE_BIT_SYNC (1<<1) +#define LOC_GNSS_MEASUREMENT_STATE_SUBFRAME_SYNC (1<<2) +#define LOC_GNSS_MEASUREMENT_STATE_TOW_DECODED (1<<3) +#define LOC_GNSS_MEASUREMENT_STATE_MSEC_AMBIGUOUS (1<<4) +#define LOC_GNSS_MEASUREMENT_STATE_SYMBOL_SYNC (1<<5) +#define LOC_GNSS_MEASUREMENT_STATE_GLO_STRING_SYNC (1<<6) +#define LOC_GNSS_MEASUREMENT_STATE_GLO_TOD_DECODED (1<<7) +#define LOC_GNSS_MEASUREMENT_STATE_BDS_D2_BIT_SYNC (1<<8) +#define LOC_GNSS_MEASUREMENT_STATE_BDS_D2_SUBFRAME_SYNC (1<<9) +#define LOC_GNSS_MEASUREMENT_STATE_GAL_E1BC_CODE_LOCK (1<<10) +#define LOC_GNSS_MEASUREMENT_STATE_GAL_E1C_2ND_CODE_LOCK (1<<11) +#define LOC_GNSS_MEASUREMENT_STATE_GAL_E1B_PAGE_SYNC (1<<12) +#define LOC_GNSS_MEASUREMENT_STATE_SBAS_SYNC (1<<13) + +/* The following typedef together with its constants below are deprecated, and + * will be removed in the next release. */ +typedef uint16_t LocGpsAccumulatedDeltaRangeState; +#define LOC_GPS_ADR_STATE_UNKNOWN 0 +#define LOC_GPS_ADR_STATE_VALID (1<<0) +#define LOC_GPS_ADR_STATE_RESET (1<<1) +#define LOC_GPS_ADR_STATE_CYCLE_SLIP (1<<2) + +/** + * Flags indicating the Accumulated Delta Range's states. + */ +typedef uint16_t LocGnssAccumulatedDeltaRangeState; +#define LOC_GNSS_ADR_STATE_UNKNOWN 0 +#define LOC_GNSS_ADR_STATE_VALID (1<<0) +#define LOC_GNSS_ADR_STATE_RESET (1<<1) +#define LOC_GNSS_ADR_STATE_CYCLE_SLIP (1<<2) + +#if 0 +/* The following typedef together with its constants below are deprecated, and + * will be removed in the next release. */ +typedef uint8_t GpsNavigationMessageType; +#define GPS_NAVIGATION_MESSAGE_TYPE_UNKNOWN 0 +#define GPS_NAVIGATION_MESSAGE_TYPE_L1CA 1 +#define GPS_NAVIGATION_MESSAGE_TYPE_L2CNAV 2 +#define GPS_NAVIGATION_MESSAGE_TYPE_L5CNAV 3 +#define GPS_NAVIGATION_MESSAGE_TYPE_CNAV2 4 + +/** + * Enumeration of available values to indicate the GNSS Navigation message + * types. + * + * For convenience, first byte is the LocGnssConstellationType on which that signal + * is typically transmitted + */ +typedef int16_t GnssNavigationMessageType; + +#define GNSS_NAVIGATION_MESSAGE_TYPE_UNKNOWN 0 +/** GPS L1 C/A message contained in the structure. */ +#define GNSS_NAVIGATION_MESSAGE_TYPE_GPS_L1CA 0x0101 +/** GPS L2-CNAV message contained in the structure. */ +#define GNSS_NAVIGATION_MESSAGE_TYPE_GPS_L2CNAV 0x0102 +/** GPS L5-CNAV message contained in the structure. */ +#define GNSS_NAVIGATION_MESSAGE_TYPE_GPS_L5CNAV 0x0103 +/** GPS CNAV-2 message contained in the structure. */ +#define GNSS_NAVIGATION_MESSAGE_TYPE_GPS_CNAV2 0x0104 +/** Glonass L1 CA message contained in the structure. */ +#define GNSS_NAVIGATION_MESSAGE_TYPE_GLO_L1CA 0x0301 +/** Beidou D1 message contained in the structure. */ +#define GNSS_NAVIGATION_MESSAGE_TYPE_BDS_D1 0x0501 +/** Beidou D2 message contained in the structure. */ +#define GNSS_NAVIGATION_MESSAGE_TYPE_BDS_D2 0x0502 +/** Galileo I/NAV message contained in the structure. */ +#define GNSS_NAVIGATION_MESSAGE_TYPE_GAL_I 0x0601 +/** Galileo F/NAV message contained in the structure. */ +#define GNSS_NAVIGATION_MESSAGE_TYPE_GAL_F 0x0602 + +/** + * Status of Navigation Message + * When a message is received properly without any parity error in its navigation words, the + * status should be set to NAV_MESSAGE_STATUS_PARITY_PASSED. But if a message is received + * with words that failed parity check, but GPS is able to correct those words, the status + * should be set to NAV_MESSAGE_STATUS_PARITY_REBUILT. + * No need to send any navigation message that contains words with parity error and cannot be + * corrected. + */ +typedef uint16_t NavigationMessageStatus; +#define NAV_MESSAGE_STATUS_UNKNOWN 0 +#define NAV_MESSAGE_STATUS_PARITY_PASSED (1<<0) +#define NAV_MESSAGE_STATUS_PARITY_REBUILT (1<<1) + +/* This constant is deprecated, and will be removed in the next release. */ +#define NAV_MESSAGE_STATUS_UNKONW 0 +#endif + +/** + * Flags that indicate information about the satellite + */ +typedef uint8_t LocGnssSvFlags; +#define LOC_GNSS_SV_FLAGS_NONE 0 +#define LOC_GNSS_SV_FLAGS_HAS_EPHEMERIS_DATA (1 << 0) +#define LOC_GNSS_SV_FLAGS_HAS_ALMANAC_DATA (1 << 1) +#define LOC_GNSS_SV_FLAGS_USED_IN_FIX (1 << 2) + +/** + * Constellation type of LocGnssSvInfo + */ +typedef uint8_t LocGnssConstellationType; +#define LOC_GNSS_CONSTELLATION_UNKNOWN 0 +#define LOC_GNSS_CONSTELLATION_GPS 1 +#define LOC_GNSS_CONSTELLATION_SBAS 2 +#define LOC_GNSS_CONSTELLATION_GLONASS 3 +#define LOC_GNSS_CONSTELLATION_QZSS 4 +#define LOC_GNSS_CONSTELLATION_BEIDOU 5 +#define LOC_GNSS_CONSTELLATION_GALILEO 6 + +/** + * Name for the GPS XTRA interface. + */ +#define LOC_GPS_XTRA_INTERFACE "gps-xtra" + +/** + * Name for the GPS DEBUG interface. + */ +#define LOC_GPS_DEBUG_INTERFACE "gps-debug" + +/** + * Name for the AGPS interface. + */ + +#define LOC_AGPS_INTERFACE "agps" + +/** + * Name of the Supl Certificate interface. + */ +#define LOC_SUPL_CERTIFICATE_INTERFACE "supl-certificate" + +/** + * Name for NI interface + */ +#define LOC_GPS_NI_INTERFACE "gps-ni" + +/** + * Name for the AGPS-RIL interface. + */ +#define LOC_AGPS_RIL_INTERFACE "agps_ril" + +/** + * Name for the GPS_Geofencing interface. + */ +#define LOC_GPS_GEOFENCING_INTERFACE "gps_geofencing" + +/** + * Name of the GPS Measurements interface. + */ +#define LOC_GPS_MEASUREMENT_INTERFACE "gps_measurement" + +/** + * Name of the GPS navigation message interface. + */ +#define LOC_GPS_NAVIGATION_MESSAGE_INTERFACE "gps_navigation_message" + +/** + * Name of the GNSS/GPS configuration interface. + */ +#define LOC_GNSS_CONFIGURATION_INTERFACE "gnss_configuration" + +/** Represents a location. */ +typedef struct { + /** set to sizeof(LocGpsLocation) */ + uint32_t size; + /** Contains LocGpsLocationFlags bits. */ + uint16_t flags; + /** The spoof mask */ + LocGpsSpoofMask spoof_mask; + /** Represents latitude in degrees. */ + double latitude; + /** Represents longitude in degrees. */ + double longitude; + /** + * Represents altitude in meters above the WGS 84 reference ellipsoid. + */ + double altitude; + /** Represents horizontal speed in meters per second. */ + float speed; + /** Represents heading in degrees. */ + float bearing; + /** Represents expected accuracy in meters. */ + float accuracy; + /** Represents the expected vertical uncertainity in meters*/ + float vertUncertainity; + /** Timestamp for the location fix. */ + LocGpsUtcTime timestamp; +} LocGpsLocation; + +/** Represents the status. */ +typedef struct { + /** set to sizeof(LocGpsStatus) */ + size_t size; + LocGpsStatusValue status; +} LocGpsStatus; + +/** + * Legacy struct to represents SV information. + * Deprecated, to be removed in the next Android release. + * Use LocGnssSvInfo instead. + */ +typedef struct { + /** set to sizeof(LocGpsSvInfo) */ + size_t size; + /** Pseudo-random number for the SV. */ + int prn; + /** Signal to noise ratio. */ + float snr; + /** Elevation of SV in degrees. */ + float elevation; + /** Azimuth of SV in degrees. */ + float azimuth; +} LocGpsSvInfo; + +typedef struct { + /** set to sizeof(LocGnssSvInfo) */ + size_t size; + + /** + * Pseudo-random number for the SV, or FCN/OSN number for Glonass. The + * distinction is made by looking at constellation field. Values should be + * in the range of: + * + * - GPS: 1-32 + * - SBAS: 120-151, 183-192 + * - GLONASS: 1-24, the orbital slot number (OSN), if known. Or, if not: + * 93-106, the frequency channel number (FCN) (-7 to +6) offset by + 100 + * i.e. report an FCN of -7 as 93, FCN of 0 as 100, and FCN of +6 as 106. + * - QZSS: 193-200 + * - Galileo: 1-36 + * - Beidou: 1-37 + */ + int16_t svid; + + /** + * Defines the constellation of the given SV. Value should be one of those + * LOC_GNSS_CONSTELLATION_* constants + */ + LocGnssConstellationType constellation; + + /** + * Carrier-to-noise density in dB-Hz, typically in the range [0, 63]. + * It contains the measured C/N0 value for the signal at the antenna port. + * + * This is a mandatory value. + */ + float c_n0_dbhz; + + /** Elevation of SV in degrees. */ + float elevation; + + /** Azimuth of SV in degrees. */ + float azimuth; + + /** + * Contains additional data about the given SV. Value should be one of those + * LOC_GNSS_SV_FLAGS_* constants + */ + LocGnssSvFlags flags; + +} LocGnssSvInfo; + +/** + * Legacy struct to represents SV status. + * Deprecated, to be removed in the next Android release. + * Use LocGnssSvStatus instead. + */ +typedef struct { + /** set to sizeof(LocGpsSvStatus) */ + size_t size; + int num_svs; + LocGpsSvInfo sv_list[LOC_GPS_MAX_SVS]; + uint32_t ephemeris_mask; + uint32_t almanac_mask; + uint32_t used_in_fix_mask; +} LocGpsSvStatus; + +/** + * Represents SV status. + */ +typedef struct { + /** set to sizeof(LocGnssSvStatus) */ + size_t size; + + /** Number of GPS SVs currently visible, refers to the SVs stored in sv_list */ + int num_svs; + /** + * Pointer to an array of SVs information for all GNSS constellations, + * except GPS, which is reported using sv_list + */ + LocGnssSvInfo gnss_sv_list[LOC_GNSS_MAX_SVS]; + +} LocGnssSvStatus; + +/* CellID for 2G, 3G and LTE, used in AGPS. */ +typedef struct { + LocAGpsRefLocationType type; + /** Mobile Country Code. */ + uint16_t mcc; + /** Mobile Network Code .*/ + uint16_t mnc; + /** Location Area Code in 2G, 3G and LTE. In 3G lac is discarded. In LTE, + * lac is populated with tac, to ensure that we don't break old clients that + * might rely in the old (wrong) behavior. + */ + uint16_t lac; + /** Cell id in 2G. Utran Cell id in 3G. Cell Global Id EUTRA in LTE. */ + uint32_t cid; + /** Tracking Area Code in LTE. */ + uint16_t tac; + /** Physical Cell id in LTE (not used in 2G and 3G) */ + uint16_t pcid; +} LocAGpsRefLocationCellID; + +typedef struct { + uint8_t mac[6]; +} LocAGpsRefLocationMac; + +/** Represents ref locations */ +typedef struct { + LocAGpsRefLocationType type; + union { + LocAGpsRefLocationCellID cellID; + LocAGpsRefLocationMac mac; + } u; +} LocAGpsRefLocation; + +/** + * Callback with location information. Can only be called from a thread created + * by create_thread_cb. + */ +typedef void (* loc_gps_location_callback)(LocGpsLocation* location); + +/** + * Callback with status information. Can only be called from a thread created by + * create_thread_cb. + */ +typedef void (* loc_gps_status_callback)(LocGpsStatus* status); +/** + * Legacy callback with SV status information. + * Can only be called from a thread created by create_thread_cb. + * + * This callback is deprecated, and will be removed in the next release. Use + * loc_gnss_sv_status_callback() instead. + */ +typedef void (* loc_gps_sv_status_callback)(LocGpsSvStatus* sv_info); + +/** + * Callback with SV status information. + * Can only be called from a thread created by create_thread_cb. + */ +typedef void (* loc_gnss_sv_status_callback)(LocGnssSvStatus* sv_info); + +/** + * Callback for reporting NMEA sentences. Can only be called from a thread + * created by create_thread_cb. + */ +typedef void (* loc_gps_nmea_callback)(LocGpsUtcTime timestamp, const char* nmea, int length); + +/** + * Callback to inform framework of the GPS engine's capabilities. Capability + * parameter is a bit field of LOC_GPS_CAPABILITY_* flags. + */ +typedef void (* loc_gps_set_capabilities)(uint32_t capabilities); + +/** + * Callback utility for acquiring the GPS wakelock. This can be used to prevent + * the CPU from suspending while handling GPS events. + */ +typedef void (* loc_gps_acquire_wakelock)(); + +/** Callback utility for releasing the GPS wakelock. */ +typedef void (* loc_gps_release_wakelock)(); + +/** Callback for requesting NTP time */ +typedef void (* loc_gps_request_utc_time)(); + +/** + * Callback for creating a thread that can call into the Java framework code. + * This must be used to create any threads that report events up to the + * framework. + */ +typedef pthread_t (* loc_gps_create_thread)(const char* name, void (*start)(void *), void* arg); + +/** + * Provides information about how new the underlying GPS/GNSS hardware and + * software is. + * + * This information will be available for Android Test Applications. If a GPS + * HAL does not provide this information, it will be considered "2015 or + * earlier". + * + * If a GPS HAL does provide this information, then newer years will need to + * meet newer CTS standards. E.g. if the date are 2016 or above, then N+ level + * LocGpsMeasurement support will be verified. + */ +typedef struct { + /** Set to sizeof(LocGnssSystemInfo) */ + size_t size; + /* year in which the last update was made to the underlying hardware/firmware + * used to capture GNSS signals, e.g. 2016 */ + uint16_t year_of_hw; +} LocGnssSystemInfo; + +/** + * Callback to inform framework of the engine's hardware version information. + */ +typedef void (*loc_gnss_set_system_info)(const LocGnssSystemInfo* info); + +/** New GPS callback structure. */ +typedef struct { + /** set to sizeof(LocGpsCallbacks) */ + size_t size; + loc_gps_location_callback location_cb; + loc_gps_status_callback status_cb; + loc_gps_sv_status_callback sv_status_cb; + loc_gps_nmea_callback nmea_cb; + loc_gps_set_capabilities set_capabilities_cb; + loc_gps_acquire_wakelock acquire_wakelock_cb; + loc_gps_release_wakelock release_wakelock_cb; + loc_gps_create_thread create_thread_cb; + loc_gps_request_utc_time request_utc_time_cb; + + loc_gnss_set_system_info set_system_info_cb; + loc_gnss_sv_status_callback gnss_sv_status_cb; +} LocGpsCallbacks; + +/** Represents the standard GPS interface. */ +typedef struct { + /** set to sizeof(LocGpsInterface) */ + size_t size; + /** + * Opens the interface and provides the callback routines + * to the implementation of this interface. + */ + int (*init)( LocGpsCallbacks* callbacks ); + + /** Starts navigating. */ + int (*start)( void ); + + /** Stops navigating. */ + int (*stop)( void ); + + /** Closes the interface. */ + void (*cleanup)( void ); + + /** Injects the current time. */ + int (*inject_time)(LocGpsUtcTime time, int64_t timeReference, + int uncertainty); + + /** + * Injects current location from another location provider (typically cell + * ID). Latitude and longitude are measured in degrees expected accuracy is + * measured in meters + */ + int (*inject_location)(double latitude, double longitude, float accuracy); + + /** + * Specifies that the next call to start will not use the + * information defined in the flags. LOC_GPS_DELETE_ALL is passed for + * a cold start. + */ + void (*delete_aiding_data)(LocGpsAidingData flags); + + /** + * min_interval represents the time between fixes in milliseconds. + * preferred_accuracy represents the requested fix accuracy in meters. + * preferred_time represents the requested time to first fix in milliseconds. + * + * 'mode' parameter should be one of LOC_GPS_POSITION_MODE_MS_BASED + * or LOC_GPS_POSITION_MODE_STANDALONE. + * It is allowed by the platform (and it is recommended) to fallback to + * LOC_GPS_POSITION_MODE_MS_BASED if LOC_GPS_POSITION_MODE_MS_ASSISTED is passed in, and + * LOC_GPS_POSITION_MODE_MS_BASED is supported. + */ + int (*set_position_mode)(LocGpsPositionMode mode, LocGpsPositionRecurrence recurrence, + uint32_t min_interval, uint32_t preferred_accuracy, uint32_t preferred_time); + + /** Get a pointer to extension information. */ + const void* (*get_extension)(const char* name); +} LocGpsInterface; + +/** + * Callback to request the client to download XTRA data. The client should + * download XTRA data and inject it by calling inject_xtra_data(). Can only be + * called from a thread created by create_thread_cb. + */ +typedef void (* loc_gps_xtra_download_request)(); + +/** Callback structure for the XTRA interface. */ +typedef struct { + loc_gps_xtra_download_request download_request_cb; + loc_gps_create_thread create_thread_cb; +} LocGpsXtraCallbacks; + +/** Extended interface for XTRA support. */ +typedef struct { + /** set to sizeof(LocGpsXtraInterface) */ + size_t size; + /** + * Opens the XTRA interface and provides the callback routines + * to the implementation of this interface. + */ + int (*init)( LocGpsXtraCallbacks* callbacks ); + /** Injects XTRA data into the GPS. */ + int (*inject_xtra_data)( char* data, int length ); +} LocGpsXtraInterface; + +#if 0 +/** Extended interface for DEBUG support. */ +typedef struct { + /** set to sizeof(LocGpsDebugInterface) */ + size_t size; + + /** + * This function should return any information that the native + * implementation wishes to include in a bugreport. + */ + size_t (*get_internal_state)(char* buffer, size_t bufferSize); +} LocGpsDebugInterface; +#endif + +/* + * Represents the status of AGPS augmented to support IPv4 and IPv6. + */ +typedef struct { + /** set to sizeof(LocAGpsStatus) */ + size_t size; + + LocAGpsType type; + LocAGpsStatusValue status; + + /** + * Must be set to a valid IPv4 address if the field 'addr' contains an IPv4 + * address, or set to INADDR_NONE otherwise. + */ + uint32_t ipaddr; + + /** + * Must contain the IPv4 (AF_INET) or IPv6 (AF_INET6) address to report. + * Any other value of addr.ss_family will be rejected. + */ + struct sockaddr_storage addr; +} LocAGpsStatus; + +/** + * Callback with AGPS status information. Can only be called from a thread + * created by create_thread_cb. + */ +typedef void (* loc_agps_status_callback)(LocAGpsStatus* status); + +/** Callback structure for the AGPS interface. */ +typedef struct { + loc_agps_status_callback status_cb; + loc_gps_create_thread create_thread_cb; +} LocAGpsCallbacks; + +/** + * Extended interface for AGPS support, it is augmented to enable to pass + * extra APN data. + */ +typedef struct { + /** set to sizeof(LocAGpsInterface) */ + size_t size; + + /** + * Opens the AGPS interface and provides the callback routines to the + * implementation of this interface. + */ + void (*init)(LocAGpsCallbacks* callbacks); + /** + * Deprecated. + * If the HAL supports LocAGpsInterface_v2 this API will not be used, see + * data_conn_open_with_apn_ip_type for more information. + */ + 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)(LocAGpsType type, const char* hostname, int port); + + /** + * Notifies that a data connection is available and sets the name of the + * APN, and its IP type, to be used for SUPL connections. + */ + int (*data_conn_open_with_apn_ip_type)( + const char* apn, + LocApnIpType apnIpType); +} LocAGpsInterface; + +/** Error codes associated with certificate operations */ +#define LOC_AGPS_CERTIFICATE_OPERATION_SUCCESS 0 +#define LOC_AGPS_CERTIFICATE_ERROR_GENERIC -100 +#define LOC_AGPS_CERTIFICATE_ERROR_TOO_MANY_CERTIFICATES -101 + +/** A data structure that represents an X.509 certificate using DER encoding */ +typedef struct { + size_t length; + u_char* data; +} LocDerEncodedCertificate; + +/** + * A type definition for SHA1 Fingerprints used to identify X.509 Certificates + * The Fingerprint is a digest of the DER Certificate that uniquely identifies it. + */ +typedef struct { + u_char data[20]; +} LocSha1CertificateFingerprint; + +/** AGPS Interface to handle SUPL certificate operations */ +typedef struct { + /** set to sizeof(LocSuplCertificateInterface) */ + size_t size; + + /** + * Installs a set of Certificates used for SUPL connections to the AGPS server. + * If needed the HAL should find out internally any certificates that need to be removed to + * accommodate the certificates to install. + * The certificates installed represent a full set of valid certificates needed to connect to + * AGPS SUPL servers. + * The list of certificates is required, and all must be available at the same time, when trying + * to establish a connection with the AGPS Server. + * + * Parameters: + * certificates - A pointer to an array of DER encoded certificates that are need to be + * installed in the HAL. + * length - The number of certificates to install. + * Returns: + * LOC_AGPS_CERTIFICATE_OPERATION_SUCCESS if the operation is completed successfully + * LOC_AGPS_CERTIFICATE_ERROR_TOO_MANY_CERTIFICATES if the HAL cannot store the number of + * certificates attempted to be installed, the state of the certificates stored should + * remain the same as before on this error case. + * + * IMPORTANT: + * If needed the HAL should find out internally the set of certificates that need to be + * removed to accommodate the certificates to install. + */ + int (*install_certificates) ( const LocDerEncodedCertificate* certificates, size_t length ); + + /** + * Notifies the HAL that a list of certificates used for SUPL connections are revoked. It is + * expected that the given set of certificates is removed from the internal store of the HAL. + * + * Parameters: + * fingerprints - A pointer to an array of SHA1 Fingerprints to identify the set of + * certificates to revoke. + * length - The number of fingerprints provided. + * Returns: + * LOC_AGPS_CERTIFICATE_OPERATION_SUCCESS if the operation is completed successfully. + * + * IMPORTANT: + * If any of the certificates provided (through its fingerprint) is not known by the HAL, + * it should be ignored and continue revoking/deleting the rest of them. + */ + int (*revoke_certificates) ( const LocSha1CertificateFingerprint* fingerprints, size_t length ); +} LocSuplCertificateInterface; + +/** Represents an NI request */ +typedef struct { + /** set to sizeof(LocGpsNiNotification) */ + 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 LOC_GPS_NI_TYPE_VOICE, LOC_GPS_NI_TYPE_UMTS_SUPL, ... + */ + LocGpsNiType ni_type; + + /** + * Notification/verification options, combinations of LocGpsNiNotifyFlags constants + */ + LocGpsNiNotifyFlags notify_flags; + + /** + * Timeout period to wait for user response. + * Set to 0 for no time out limit. + */ + int timeout; + + /** + * Default response when time out. + */ + LocGpsUserResponseType default_response; + + /** + * Requestor ID + */ + char requestor_id[LOC_GPS_NI_SHORT_STRING_MAXLEN]; + + /** + * Notification message. It can also be used to store client_id in some cases + */ + char text[LOC_GPS_NI_LONG_STRING_MAXLEN]; + + /** + * Client name decoding scheme + */ + LocGpsNiEncodingType requestor_id_encoding; + + /** + * Client name decoding scheme + */ + LocGpsNiEncodingType text_encoding; + + /** + * A pointer to extra data. Format: + * key_1 = value_1 + * key_2 = value_2 + */ + char extras[LOC_GPS_NI_LONG_STRING_MAXLEN]; + +} LocGpsNiNotification; + +/** + * Callback with NI notification. Can only be called from a thread created by + * create_thread_cb. + */ +typedef void (*loc_gps_ni_notify_callback)(LocGpsNiNotification *notification); + +/** GPS NI callback structure. */ +typedef struct +{ + /** + * Sends the notification request from HAL to GPSLocationProvider. + */ + loc_gps_ni_notify_callback notify_cb; + loc_gps_create_thread create_thread_cb; +} LocGpsNiCallbacks; + +/** + * Extended interface for Network-initiated (NI) support. + */ +typedef struct +{ + /** set to sizeof(LocGpsNiInterface) */ + size_t size; + + /** Registers the callbacks for HAL to use. */ + void (*init) (LocGpsNiCallbacks *callbacks); + + /** Sends a response to HAL. */ + void (*respond) (int notif_id, LocGpsUserResponseType user_response); +} LocGpsNiInterface; + +#define LOC_AGPS_RIL_REQUEST_SETID_IMSI (1<<0L) +#define LOC_AGPS_RIL_REQUEST_SETID_MSISDN (1<<1L) + +#define LOC_AGPS_RIL_REQUEST_REFLOC_CELLID (1<<0L) +#define LOC_AGPS_RIL_REQUEST_REFLOC_MAC (1<<1L) + +typedef void (*loc_agps_ril_request_set_id)(uint32_t flags); +typedef void (*loc_agps_ril_request_ref_loc)(uint32_t flags); + +typedef struct { + loc_agps_ril_request_set_id request_setid; + loc_agps_ril_request_ref_loc request_refloc; + loc_gps_create_thread create_thread_cb; +} LocAGpsRilCallbacks; + +/** Extended interface for AGPS_RIL support. */ +typedef struct { + /** set to sizeof(LocAGpsRilInterface) */ + size_t size; + /** + * Opens the AGPS interface and provides the callback routines + * to the implementation of this interface. + */ + void (*init)( LocAGpsRilCallbacks* callbacks ); + + /** + * Sets the reference location. + */ + void (*set_ref_location) (const LocAGpsRefLocation *agps_reflocation, size_t sz_struct); + /** + * Sets the set ID. + */ + void (*set_set_id) (LocAGpsSetIDType 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); +} LocAGpsRilInterface; + +/** + * 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, loc_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 LOC_GPS_GEOFENCE_ENTERED (1<<0L) +#define LOC_GPS_GEOFENCE_EXITED (1<<1L) +#define LOC_GPS_GEOFENCE_UNCERTAIN (1<<2L) + +#define LOC_GPS_GEOFENCE_UNAVAILABLE (1<<0L) +#define LOC_GPS_GEOFENCE_AVAILABLE (1<<1L) + +#define LOC_GPS_GEOFENCE_OPERATION_SUCCESS 0 +#define LOC_GPS_GEOFENCE_ERROR_TOO_MANY_GEOFENCES -100 +#define LOC_GPS_GEOFENCE_ERROR_ID_EXISTS -101 +#define LOC_GPS_GEOFENCE_ERROR_ID_UNKNOWN -102 +#define LOC_GPS_GEOFENCE_ERROR_INVALID_TRANSITION -103 +#define LOC_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 LOC_GPS_GEOFENCE_ENTERED, LOC_GPS_GEOFENCE_EXITED, + * LOC_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 (*loc_gps_geofence_transition_callback) (int32_t geofence_id, LocGpsLocation* location, + int32_t transition, LocGpsUtcTime timestamp); + +/** + * The callback associated with the availability 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 LOC_GPS_GEOFENCE_UNAVAILABLE parameter. + * + * Parameters: + * status - LOC_GPS_GEOFENCE_UNAVAILABLE or LOC_GPS_GEOFENCE_AVAILABLE. + * last_location - Last known location. + */ +typedef void (*loc_gps_geofence_status_callback) (int32_t status, LocGpsLocation* last_location); + +/** + * The callback associated with the add_geofence call. + * + * Parameter: + * geofence_id - Id of the geofence. + * status - LOC_GPS_GEOFENCE_OPERATION_SUCCESS + * LOC_GPS_GEOFENCE_ERROR_TOO_MANY_GEOFENCES - geofence limit has been reached. + * LOC_GPS_GEOFENCE_ERROR_ID_EXISTS - geofence with id already exists + * LOC_GPS_GEOFENCE_ERROR_INVALID_TRANSITION - the monitorTransition contains an + * invalid transition + * LOC_GPS_GEOFENCE_ERROR_GENERIC - for other errors. + */ +typedef void (*loc_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 - LOC_GPS_GEOFENCE_OPERATION_SUCCESS + * LOC_GPS_GEOFENCE_ERROR_ID_UNKNOWN - for invalid id + * LOC_GPS_GEOFENCE_ERROR_GENERIC for others. + */ +typedef void (*loc_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 - LOC_GPS_GEOFENCE_OPERATION_SUCCESS + * LOC_GPS_GEOFENCE_ERROR_ID_UNKNOWN - for invalid id + * LOC_GPS_GEOFENCE_ERROR_INVALID_TRANSITION - + * when monitor_transitions is invalid + * LOC_GPS_GEOFENCE_ERROR_GENERIC for others. + */ +typedef void (*loc_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 - LOC_GPS_GEOFENCE_OPERATION_SUCCESS + * LOC_GPS_GEOFENCE_ERROR_ID_UNKNOWN - for invalid id + * LOC_GPS_GEOFENCE_ERROR_GENERIC for others. + */ +typedef void (*loc_gps_geofence_resume_callback) (int32_t geofence_id, int32_t status); + +typedef struct { + loc_gps_geofence_transition_callback geofence_transition_callback; + loc_gps_geofence_status_callback geofence_status_callback; + loc_gps_geofence_add_callback geofence_add_callback; + loc_gps_geofence_remove_callback geofence_remove_callback; + loc_gps_geofence_pause_callback geofence_pause_callback; + loc_gps_geofence_resume_callback geofence_resume_callback; + loc_gps_create_thread create_thread_cb; +} LocGpsGeofenceCallbacks; + +/** Extended interface for GPS_Geofencing support */ +typedef struct { + /** set to sizeof(LocGpsGeofencingInterface) */ + size_t size; + + /** + * Opens the geofence interface and provides the callback routines + * to the implementation of this interface. + */ + void (*init)( LocGpsGeofenceCallbacks* 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 (LOC_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 LOC_GPS_GEOFENCE_ENTERED. In most cases, it + * will be LOC_GPS_GEOFENCE_UNCERTAIN. + * monitor_transition - Which transitions to monitor. Bitwise OR of + * LOC_GPS_GEOFENCE_ENTERED, LOC_GPS_GEOFENCE_EXITED and + * LOC_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 LOC_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 parameter 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 + * LOC_GPS_GEOFENCE_ENTERED, LOC_GPS_GEOFENCE_EXITED and + * LOC_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); +} LocGpsGeofencingInterface; + +/** + * Legacy struct to represent an estimate of the GPS clock time. + * Deprecated, to be removed in the next Android release. + * Use LocGnssClock instead. + */ +typedef struct { + /** set to sizeof(LocGpsClock) */ + size_t size; + LocGpsClockFlags flags; + int16_t leap_second; + LocGpsClockType type; + int64_t time_ns; + double time_uncertainty_ns; + int64_t full_bias_ns; + double bias_ns; + double bias_uncertainty_ns; + double drift_nsps; + double drift_uncertainty_nsps; +} LocGpsClock; + +/** + * Represents an estimate of the GPS clock time. + */ +typedef struct { + /** set to sizeof(LocGnssClock) */ + size_t size; + + /** + * A set of flags indicating the validity of the fields in this data + * structure. + */ + LocGnssClockFlags flags; + + /** + * Leap second data. + * The sign of the value is defined by the following equation: + * utc_time_ns = time_ns - (full_bias_ns + bias_ns) - leap_second * + * 1,000,000,000 + * + * If the data is available 'flags' must contain LOC_GNSS_CLOCK_HAS_LEAP_SECOND. + */ + int16_t leap_second; + + /** + * The GNSS receiver internal clock value. This is the local hardware clock + * value. + * + * For local hardware clock, this value is expected to be monotonically + * increasing while the hardware clock remains power on. (For the case of a + * HW clock that is not continuously on, see the + * hw_clock_discontinuity_count field). The receiver's estimate of GPS time + * can be derived by substracting the sum of full_bias_ns and bias_ns (when + * available) from this value. + * + * This GPS time is expected to be the best estimate of current GPS time + * that GNSS receiver can achieve. + * + * Sub-nanosecond accuracy can be provided by means of the 'bias_ns' field. + * The value contains the 'time uncertainty' in it. + * + * This field is mandatory. + */ + int64_t time_ns; + + /** + * 1-Sigma uncertainty associated with the clock's time in nanoseconds. + * The uncertainty is represented as an absolute (single sided) value. + * + * If the data is available, 'flags' must contain + * LOC_GNSS_CLOCK_HAS_TIME_UNCERTAINTY. This value is effectively zero (it is + * the reference local clock, by which all other times and time + * uncertainties are measured.) (And thus this field can be not provided, + * per LOC_GNSS_CLOCK_HAS_TIME_UNCERTAINTY flag, or provided & set to 0.) + */ + double time_uncertainty_ns; + + /** + * The difference between hardware clock ('time' field) inside GPS receiver + * and the true GPS time since 0000Z, January 6, 1980, in nanoseconds. + * + * The sign of the value is defined by the following equation: + * local estimate of GPS time = time_ns - (full_bias_ns + bias_ns) + * + * This value is mandatory if the receiver has estimated GPS time. If the + * computed time is for a non-GPS constellation, the time offset of that + * constellation to GPS has to be applied to fill this value. The error + * estimate for the sum of this and the bias_ns is the bias_uncertainty_ns, + * and the caller is responsible for using this uncertainty (it can be very + * large before the GPS time has been solved for.) If the data is available + * 'flags' must contain LOC_GNSS_CLOCK_HAS_FULL_BIAS. + */ + int64_t full_bias_ns; + + /** + * Sub-nanosecond bias. + * The error estimate for the sum of this and the full_bias_ns is the + * bias_uncertainty_ns + * + * If the data is available 'flags' must contain LOC_GNSS_CLOCK_HAS_BIAS. If GPS + * has computed a position fix. This value is mandatory if the receiver has + * estimated GPS time. + */ + double bias_ns; + + /** + * 1-Sigma uncertainty associated with the local estimate of GPS time (clock + * bias) in nanoseconds. The uncertainty is represented as an absolute + * (single sided) value. + * + * If the data is available 'flags' must contain + * LOC_GNSS_CLOCK_HAS_BIAS_UNCERTAINTY. This value is mandatory if the receiver + * has estimated GPS time. + */ + double bias_uncertainty_ns; + + /** + * The clock's drift in nanoseconds (per second). + * + * A positive value means that the frequency is higher than the nominal + * frequency, and that the (full_bias_ns + bias_ns) is growing more positive + * over time. + * + * The value contains the 'drift uncertainty' in it. + * If the data is available 'flags' must contain LOC_GNSS_CLOCK_HAS_DRIFT. + * + * This value is mandatory if the receiver has estimated GNSS time + */ + double drift_nsps; + + /** + * 1-Sigma uncertainty associated with the clock's drift in nanoseconds (per second). + * The uncertainty is represented as an absolute (single sided) value. + * + * If the data is available 'flags' must contain + * LOC_GNSS_CLOCK_HAS_DRIFT_UNCERTAINTY. If GPS has computed a position fix this + * field is mandatory and must be populated. + */ + double drift_uncertainty_nsps; + + /** + * When there are any discontinuities in the HW clock, this field is + * mandatory. + * + * A "discontinuity" is meant to cover the case of a switch from one source + * of clock to another. A single free-running crystal oscillator (XO) + * should generally not have any discontinuities, and this can be set and + * left at 0. + * + * If, however, the time_ns value (HW clock) is derived from a composite of + * sources, that is not as smooth as a typical XO, or is otherwise stopped & + * restarted, then this value shall be incremented each time a discontinuity + * occurs. (E.g. this value may start at zero at device boot-up and + * increment each time there is a change in clock continuity. In the + * unlikely event that this value reaches full scale, rollover (not + * clamping) is required, such that this value continues to change, during + * subsequent discontinuity events.) + * + * While this number stays the same, between LocGnssClock reports, it can be + * safely assumed that the time_ns value has been running continuously, e.g. + * derived from a single, high quality clock (XO like, or better, that's + * typically used during continuous GNSS signal sampling.) + * + * It is expected, esp. during periods where there are few GNSS signals + * available, that the HW clock be discontinuity-free as long as possible, + * as this avoids the need to use (waste) a GNSS measurement to fully + * re-solve for the GPS clock bias and drift, when using the accompanying + * measurements, from consecutive LocGnssData reports. + */ + uint32_t hw_clock_discontinuity_count; + +} LocGnssClock; + +/** + * Legacy struct to represent a GPS Measurement, it contains raw and computed + * information. + * Deprecated, to be removed in the next Android release. + * Use LocGnssMeasurement instead. + */ +typedef struct { + /** set to sizeof(LocGpsMeasurement) */ + size_t size; + LocGpsMeasurementFlags flags; + int8_t prn; + double time_offset_ns; + LocGpsMeasurementState state; + int64_t received_gps_tow_ns; + int64_t received_gps_tow_uncertainty_ns; + double c_n0_dbhz; + double pseudorange_rate_mps; + double pseudorange_rate_uncertainty_mps; + LocGpsAccumulatedDeltaRangeState accumulated_delta_range_state; + double accumulated_delta_range_m; + double accumulated_delta_range_uncertainty_m; + double pseudorange_m; + double pseudorange_uncertainty_m; + double code_phase_chips; + double code_phase_uncertainty_chips; + float carrier_frequency_hz; + int64_t carrier_cycles; + double carrier_phase; + double carrier_phase_uncertainty; + LocGpsLossOfLock loss_of_lock; + int32_t bit_number; + int16_t time_from_last_bit_ms; + double doppler_shift_hz; + double doppler_shift_uncertainty_hz; + LocGpsMultipathIndicator multipath_indicator; + double snr_db; + double elevation_deg; + double elevation_uncertainty_deg; + double azimuth_deg; + double azimuth_uncertainty_deg; + bool used_in_fix; +} LocGpsMeasurement; + +/** + * Represents a GNSS Measurement, it contains raw and computed information. + * + * Independence - All signal measurement information (e.g. sv_time, + * pseudorange_rate, multipath_indicator) reported in this struct should be + * based on GNSS signal measurements only. You may not synthesize measurements + * by calculating or reporting expected measurements based on known or estimated + * position, velocity, or time. + */ +typedef struct { + /** set to sizeof(LocGnssMeasurement) */ + size_t size; + + /** A set of flags indicating the validity of the fields in this data structure. */ + LocGnssMeasurementFlags flags; + + /** + * Satellite vehicle ID number, as defined in LocGnssSvInfo::svid + * This is a mandatory value. + */ + int16_t svid; + + /** + * Defines the constellation of the given SV. Value should be one of those + * LOC_GNSS_CONSTELLATION_* constants + */ + LocGnssConstellationType constellation; + + /** + * Time offset at which the measurement was taken in nanoseconds. + * The reference receiver's time is specified by LocGpsData::clock::time_ns and should be + * interpreted in the same way as indicated by LocGpsClock::type. + * + * The sign of time_offset_ns is given by the following equation: + * measurement time = LocGpsClock::time_ns + time_offset_ns + * + * It provides an individual time-stamp for the measurement, and allows sub-nanosecond accuracy. + * This is a mandatory value. + */ + double time_offset_ns; + + /** + * Per satellite sync state. It represents the current sync state for the associated satellite. + * Based on the sync state, the 'received GPS tow' field should be interpreted accordingly. + * + * This is a mandatory value. + */ + LocGnssMeasurementState state; + + /** + * The received GNSS Time-of-Week at the measurement time, in nanoseconds. + * Ensure that this field is independent (see comment at top of + * LocGnssMeasurement struct.) + * + * For GPS & QZSS, this is: + * Received GPS Time-of-Week at the measurement time, in nanoseconds. + * The value is relative to the beginning of the current GPS week. + * + * Given the highest sync state that can be achieved, per each satellite, valid range + * for this field can be: + * Searching : [ 0 ] : LOC_GNSS_MEASUREMENT_STATE_UNKNOWN + * C/A code lock : [ 0 1ms ] : LOC_GNSS_MEASUREMENT_STATE_CODE_LOCK is set + * Bit sync : [ 0 20ms ] : LOC_GNSS_MEASUREMENT_STATE_BIT_SYNC is set + * Subframe sync : [ 0 6s ] : LOC_GNSS_MEASUREMENT_STATE_SUBFRAME_SYNC is set + * TOW decoded : [ 0 1week ] : LOC_GNSS_MEASUREMENT_STATE_TOW_DECODED is set + * + * Note well: if there is any ambiguity in integer millisecond, + * LOC_GNSS_MEASUREMENT_STATE_MSEC_AMBIGUOUS should be set accordingly, in the 'state' field. + * + * This value must be populated if 'state' != LOC_GNSS_MEASUREMENT_STATE_UNKNOWN. + * + * For Glonass, this is: + * Received Glonass time of day, at the measurement time in nanoseconds. + * + * Given the highest sync state that can be achieved, per each satellite, valid range for + * this field can be: + * Searching : [ 0 ] : LOC_GNSS_MEASUREMENT_STATE_UNKNOWN + * C/A code lock : [ 0 1ms ] : LOC_GNSS_MEASUREMENT_STATE_CODE_LOCK is set + * Symbol sync : [ 0 10ms ] : LOC_GNSS_MEASUREMENT_STATE_SYMBOL_SYNC is set + * Bit sync : [ 0 20ms ] : LOC_GNSS_MEASUREMENT_STATE_BIT_SYNC is set + * String sync : [ 0 2s ] : LOC_GNSS_MEASUREMENT_STATE_GLO_STRING_SYNC is set + * Time of day : [ 0 1day ] : LOC_GNSS_MEASUREMENT_STATE_GLO_TOD_DECODED is set + * + * For Beidou, this is: + * Received Beidou time of week, at the measurement time in nanoseconds. + * + * Given the highest sync state that can be achieved, per each satellite, valid range for + * this field can be: + * Searching : [ 0 ] : LOC_GNSS_MEASUREMENT_STATE_UNKNOWN + * C/A code lock: [ 0 1ms ] : LOC_GNSS_MEASUREMENT_STATE_CODE_LOCK is set + * Bit sync (D2): [ 0 2ms ] : LOC_GNSS_MEASUREMENT_STATE_BDS_D2_BIT_SYNC is set + * Bit sync (D1): [ 0 20ms ] : LOC_GNSS_MEASUREMENT_STATE_BIT_SYNC is set + * Subframe (D2): [ 0 0.6s ] : LOC_GNSS_MEASUREMENT_STATE_BDS_D2_SUBFRAME_SYNC is set + * Subframe (D1): [ 0 6s ] : LOC_GNSS_MEASUREMENT_STATE_SUBFRAME_SYNC is set + * Time of week : [ 0 1week ] : LOC_GNSS_MEASUREMENT_STATE_TOW_DECODED is set + * + * For Galileo, this is: + * Received Galileo time of week, at the measurement time in nanoseconds. + * + * E1BC code lock : [ 0 4ms ] : LOC_GNSS_MEASUREMENT_STATE_GAL_E1BC_CODE_LOCK is set + * E1C 2nd code lock: [ 0 100ms ] : + * LOC_GNSS_MEASUREMENT_STATE_GAL_E1C_2ND_CODE_LOCK is set + * + * E1B page : [ 0 2s ] : LOC_GNSS_MEASUREMENT_STATE_GAL_E1B_PAGE_SYNC is set + * Time of week: [ 0 1week ] : LOC_GNSS_MEASUREMENT_STATE_TOW_DECODED is set + * + * For SBAS, this is: + * Received SBAS time, at the measurement time in nanoseconds. + * + * Given the highest sync state that can be achieved, per each satellite, + * valid range for this field can be: + * Searching : [ 0 ] : LOC_GNSS_MEASUREMENT_STATE_UNKNOWN + * C/A code lock: [ 0 1ms ] : LOC_GNSS_MEASUREMENT_STATE_CODE_LOCK is set + * Symbol sync : [ 0 2ms ] : LOC_GNSS_MEASUREMENT_STATE_SYMBOL_SYNC is set + * Message : [ 0 1s ] : LOC_GNSS_MEASUREMENT_STATE_SBAS_SYNC is set + */ + int64_t received_sv_time_in_ns; + + /** + * 1-Sigma uncertainty of the Received GPS Time-of-Week in nanoseconds. + * + * This value must be populated if 'state' != LOC_GPS_MEASUREMENT_STATE_UNKNOWN. + */ + int64_t received_sv_time_uncertainty_in_ns; + + /** + * Carrier-to-noise density in dB-Hz, typically in the range [0, 63]. + * It contains the measured C/N0 value for the signal at the antenna port. + * + * This is a mandatory value. + */ + double c_n0_dbhz; + + /** + * Pseudorange rate at the timestamp in m/s. The correction of a given + * Pseudorange Rate value includes corrections for receiver and satellite + * clock frequency errors. Ensure that this field is independent (see + * comment at top of LocGnssMeasurement struct.) + * + * It is mandatory to provide the 'uncorrected' 'pseudorange rate', and provide LocGpsClock's + * 'drift' field as well (When providing the uncorrected pseudorange rate, do not apply the + * corrections described above.) + * + * The value includes the 'pseudorange rate uncertainty' in it. + * A positive 'uncorrected' value indicates that the SV is moving away from the receiver. + * + * The sign of the 'uncorrected' 'pseudorange rate' and its relation to the sign of 'doppler + * shift' is given by the equation: + * pseudorange rate = -k * doppler shift (where k is a constant) + * + * This should be the most accurate pseudorange rate available, based on + * fresh signal measurements from this channel. + * + * It is mandatory that this value be provided at typical carrier phase PRR + * quality (few cm/sec per second of uncertainty, or better) - when signals + * are sufficiently strong & stable, e.g. signals from a GPS simulator at >= + * 35 dB-Hz. + */ + double pseudorange_rate_mps; + + /** + * 1-Sigma uncertainty of the pseudorange_rate_mps. + * The uncertainty is represented as an absolute (single sided) value. + * + * This is a mandatory value. + */ + double pseudorange_rate_uncertainty_mps; + + /** + * Accumulated delta range's state. It indicates whether ADR is reset or there is a cycle slip + * (indicating loss of lock). + * + * This is a mandatory value. + */ + LocGnssAccumulatedDeltaRangeState accumulated_delta_range_state; + + /** + * Accumulated delta range since the last channel reset in meters. + * A positive value indicates that the SV is moving away from the receiver. + * + * The sign of the 'accumulated delta range' and its relation to the sign of 'carrier phase' + * is given by the equation: + * accumulated delta range = -k * carrier phase (where k is a constant) + * + * This value must be populated if 'accumulated delta range state' != LOC_GPS_ADR_STATE_UNKNOWN. + * However, it is expected that the data is only accurate when: + * 'accumulated delta range state' == LOC_GPS_ADR_STATE_VALID. + */ + double accumulated_delta_range_m; + + /** + * 1-Sigma uncertainty of the accumulated delta range in meters. + * This value must be populated if 'accumulated delta range state' != LOC_GPS_ADR_STATE_UNKNOWN. + */ + double accumulated_delta_range_uncertainty_m; + + /** + * Carrier frequency at which codes and messages are modulated, it can be L1 or L2. + * If the field is not set, the carrier frequency is assumed to be L1. + * + * If the data is available, 'flags' must contain + * LOC_GNSS_MEASUREMENT_HAS_CARRIER_FREQUENCY. + */ + float carrier_frequency_hz; + + /** + * The number of full carrier cycles between the satellite and the receiver. + * The reference frequency is given by the field 'carrier_frequency_hz'. + * Indications of possible cycle slips and resets in the accumulation of + * this value can be inferred from the accumulated_delta_range_state flags. + * + * If the data is available, 'flags' must contain + * LOC_GNSS_MEASUREMENT_HAS_CARRIER_CYCLES. + */ + int64_t carrier_cycles; + + /** + * The RF phase detected by the receiver, in the range [0.0, 1.0]. + * This is usually the fractional part of the complete carrier phase measurement. + * + * The reference frequency is given by the field 'carrier_frequency_hz'. + * The value contains the 'carrier-phase uncertainty' in it. + * + * If the data is available, 'flags' must contain + * LOC_GNSS_MEASUREMENT_HAS_CARRIER_PHASE. + */ + double carrier_phase; + + /** + * 1-Sigma uncertainty of the carrier-phase. + * If the data is available, 'flags' must contain + * LOC_GNSS_MEASUREMENT_HAS_CARRIER_PHASE_UNCERTAINTY. + */ + double carrier_phase_uncertainty; + + /** + * An enumeration that indicates the 'multipath' state of the event. + * + * The multipath Indicator is intended to report the presence of overlapping + * signals that manifest as distorted correlation peaks. + * + * - if there is a distorted correlation peak shape, report that multipath + * is LOC_GNSS_MULTIPATH_INDICATOR_PRESENT. + * - if there is not a distorted correlation peak shape, report + * LOC_GNSS_MULTIPATH_INDICATOR_NOT_PRESENT + * - if signals are too weak to discern this information, report + * LOC_GNSS_MULTIPATH_INDICATOR_UNKNOWN + * + * Example: when doing the standardized overlapping Multipath Performance + * test (3GPP TS 34.171) the Multipath indicator should report + * LOC_GNSS_MULTIPATH_INDICATOR_PRESENT for those signals that are tracked, and + * contain multipath, and LOC_GNSS_MULTIPATH_INDICATOR_NOT_PRESENT for those + * signals that are tracked and do not contain multipath. + */ + LocGnssMultipathIndicator multipath_indicator; + + /** + * Signal-to-noise ratio at correlator output in dB. + * If the data is available, 'flags' must contain LOC_GNSS_MEASUREMENT_HAS_SNR. + * This is the power ratio of the "correlation peak height above the + * observed noise floor" to "the noise RMS". + */ + double snr_db; +} LocGnssMeasurement; + +/** + * Legacy struct to represents a reading of GPS measurements. + * Deprecated, to be removed in the next Android release. + * Use LocGnssData instead. + */ +typedef struct { + /** set to sizeof(LocGpsData) */ + size_t size; + size_t measurement_count; + LocGpsMeasurement measurements[LOC_GPS_MAX_MEASUREMENT]; + + /** The GPS clock time reading. */ + LocGpsClock clock; +} LocGpsData; + +/** + * Represents a reading of GNSS measurements. For devices where LocGnssSystemInfo's + * year_of_hw is set to 2016+, it is mandatory that these be provided, on + * request, when the GNSS receiver is searching/tracking signals. + * + * - Reporting of GPS constellation measurements is mandatory. + * - Reporting of all tracked constellations are encouraged. + */ +typedef struct { + /** set to sizeof(LocGnssData) */ + size_t size; + + /** Number of measurements. */ + size_t measurement_count; + + /** The array of measurements. */ + LocGnssMeasurement measurements[LOC_GNSS_MAX_MEASUREMENT]; + + /** The GPS clock time reading. */ + LocGnssClock clock; +} LocGnssData; + +/** + * The legacy callback for to report measurements from the HAL. + * + * This callback is deprecated, and will be removed in the next release. Use + * loc_gnss_measurement_callback() instead. + * + * Parameters: + * data - A data structure containing the measurements. + */ +typedef void (*loc_gps_measurement_callback) (LocGpsData* data); + +/** + * The callback for to report measurements from the HAL. + * + * Parameters: + * data - A data structure containing the measurements. + */ +typedef void (*loc_gnss_measurement_callback) (LocGnssData* data); + +typedef struct { + /** set to sizeof(LocGpsMeasurementCallbacks) */ + size_t size; + loc_gps_measurement_callback measurement_callback; + loc_gnss_measurement_callback loc_gnss_measurement_callback; +} LocGpsMeasurementCallbacks; + +#define LOC_GPS_MEASUREMENT_OPERATION_SUCCESS 0 +#define LOC_GPS_MEASUREMENT_ERROR_ALREADY_INIT -100 +#define LOC_GPS_MEASUREMENT_ERROR_GENERIC -101 + +/** + * Extended interface for GPS Measurements support. + */ +typedef struct { + /** Set to sizeof(LocGpsMeasurementInterface) */ + size_t size; + + /** + * Initializes the interface and registers the callback routines with the HAL. + * After a successful call to 'init' the HAL must begin to provide updates at its own phase. + * + * Status: + * LOC_GPS_MEASUREMENT_OPERATION_SUCCESS + * LOC_GPS_MEASUREMENT_ERROR_ALREADY_INIT - if a callback has already been registered without a + * corresponding call to 'close' + * LOC_GPS_MEASUREMENT_ERROR_GENERIC - if any other error occurred, it is expected that the HAL + * will not generate any updates upon returning this error code. + */ + int (*init) (LocGpsMeasurementCallbacks* callbacks); + + /** + * Stops updates from the HAL, and unregisters the callback routines. + * After a call to stop, the previously registered callbacks must be considered invalid by the + * HAL. + * If stop is invoked without a previous 'init', this function should perform no work. + */ + void (*close) (); + +} LocGpsMeasurementInterface; + +#if 0 +/** + * Legacy struct to represents a GPS navigation message (or a fragment of it). + * Deprecated, to be removed in the next Android release. + * Use GnssNavigationMessage instead. + */ +typedef struct { + /** set to sizeof(GpsNavigationMessage) */ + size_t size; + int8_t prn; + GpsNavigationMessageType type; + NavigationMessageStatus status; + int16_t message_id; + int16_t submessage_id; + size_t data_length; + uint8_t* data; +} GpsNavigationMessage; + +/** Represents a GPS navigation message (or a fragment of it). */ +typedef struct { + /** set to sizeof(GnssNavigationMessage) */ + size_t size; + + /** + * Satellite vehicle ID number, as defined in LocGnssSvInfo::svid + * This is a mandatory value. + */ + int16_t svid; + + /** + * The type of message contained in the structure. + * This is a mandatory value. + */ + GnssNavigationMessageType type; + + /** + * The status of the received navigation message. + * No need to send any navigation message that contains words with parity error and cannot be + * corrected. + */ + NavigationMessageStatus status; + + /** + * Message identifier. It provides an index so the complete Navigation + * Message can be assembled. + * + * - For GPS L1 C/A subframe 4 and 5, this value corresponds to the 'frame + * id' of the navigation message, in the range of 1-25 (Subframe 1, 2, 3 + * does not contain a 'frame id' and this value can be set to -1.) + * + * - For Glonass L1 C/A, this refers to the frame ID, in the range of 1-5. + * + * - For BeiDou D1, this refers to the frame number in the range of 1-24 + * + * - For Beidou D2, this refers to the frame number, in the range of 1-120 + * + * - For Galileo F/NAV nominal frame structure, this refers to the subframe + * number, in the range of 1-12 + * + * - For Galileo I/NAV nominal frame structure, this refers to the subframe + * number in the range of 1-24 + */ + int16_t message_id; + + /** + * Sub-message identifier. If required by the message 'type', this value + * contains a sub-index within the current message (or frame) that is being + * transmitted. + * + * - For GPS L1 C/A, BeiDou D1 & BeiDou D2, the submessage id corresponds to + * the subframe number of the navigation message, in the range of 1-5. + * + * - For Glonass L1 C/A, this refers to the String number, in the range from + * 1-15 + * + * - For Galileo F/NAV, this refers to the page type in the range 1-6 + * + * - For Galileo I/NAV, this refers to the word type in the range 1-10+ + */ + int16_t submessage_id; + + /** + * The length of the data (in bytes) contained in the current message. + * If this value is different from zero, 'data' must point to an array of the same size. + * e.g. for L1 C/A the size of the sub-frame will be 40 bytes (10 words, 30 bits/word). + * + * This is a mandatory value. + */ + size_t data_length; + + /** + * The data of the reported GPS message. The bytes (or words) specified + * using big endian format (MSB first). + * + * - For GPS L1 C/A, Beidou D1 & Beidou D2, each subframe contains 10 30-bit + * words. Each word (30 bits) should be fit into the last 30 bits in a + * 4-byte word (skip B31 and B32), with MSB first, for a total of 40 + * bytes, covering a time period of 6, 6, and 0.6 seconds, respectively. + * + * - For Glonass L1 C/A, each string contains 85 data bits, including the + * checksum. These bits should be fit into 11 bytes, with MSB first (skip + * B86-B88), covering a time period of 2 seconds. + * + * - For Galileo F/NAV, each word consists of 238-bit (sync & tail symbols + * excluded). Each word should be fit into 30-bytes, with MSB first (skip + * B239, B240), covering a time period of 10 seconds. + * + * - For Galileo I/NAV, each page contains 2 page parts, even and odd, with + * a total of 2x114 = 228 bits, (sync & tail excluded) that should be fit + * into 29 bytes, with MSB first (skip B229-B232). + */ + uint8_t* data; + +} GnssNavigationMessage; + +/** + * The legacy callback to report an available fragment of a GPS navigation + * messages from the HAL. + * + * This callback is deprecated, and will be removed in the next release. Use + * gnss_navigation_message_callback() instead. + * + * Parameters: + * message - The GPS navigation submessage/subframe representation. + */ +typedef void (*gps_navigation_message_callback) (GpsNavigationMessage* message); + +/** + * The callback to report an available fragment of a GPS navigation messages from the HAL. + * + * Parameters: + * message - The GPS navigation submessage/subframe representation. + */ +typedef void (*gnss_navigation_message_callback) (GnssNavigationMessage* message); + +typedef struct { + /** set to sizeof(GpsNavigationMessageCallbacks) */ + size_t size; + gps_navigation_message_callback navigation_message_callback; + gnss_navigation_message_callback gnss_navigation_message_callback; +} GpsNavigationMessageCallbacks; + +#define GPS_NAVIGATION_MESSAGE_OPERATION_SUCCESS 0 +#define GPS_NAVIGATION_MESSAGE_ERROR_ALREADY_INIT -100 +#define GPS_NAVIGATION_MESSAGE_ERROR_GENERIC -101 + +/** + * Extended interface for GPS navigation message reporting support. + */ +typedef struct { + /** Set to sizeof(GpsNavigationMessageInterface) */ + size_t size; + + /** + * Initializes the interface and registers the callback routines with the HAL. + * After a successful call to 'init' the HAL must begin to provide updates as they become + * available. + * + * Status: + * GPS_NAVIGATION_MESSAGE_OPERATION_SUCCESS + * GPS_NAVIGATION_MESSAGE_ERROR_ALREADY_INIT - if a callback has already been registered + * without a corresponding call to 'close'. + * GPS_NAVIGATION_MESSAGE_ERROR_GENERIC - if any other error occurred, it is expected that + * the HAL will not generate any updates upon returning this error code. + */ + int (*init) (GpsNavigationMessageCallbacks* callbacks); + + /** + * Stops updates from the HAL, and unregisters the callback routines. + * After a call to stop, the previously registered callbacks must be considered invalid by the + * HAL. + * If stop is invoked without a previous 'init', this function should perform no work. + */ + void (*close) (); + +} GpsNavigationMessageInterface; +#endif + +/** + * Interface for passing GNSS configuration contents from platform to HAL. + */ +typedef struct { + /** Set to sizeof(LocGnssConfigurationInterface) */ + size_t size; + + /** + * Deliver GNSS configuration contents to HAL. + * Parameters: + * config_data - a pointer to a char array which holds what usually is expected from + file(/vendor/etc/gps.conf), i.e., a sequence of UTF8 strings separated by '\n'. + * length - total number of UTF8 characters in configuraiton data. + * + * IMPORTANT: + * GPS HAL should expect this function can be called multiple times. And it may be + * called even when GpsLocationProvider is already constructed and enabled. GPS HAL + * should maintain the existing requests for various callback regardless the change + * in configuration data. + */ + void (*configuration_update) (const char* config_data, int32_t length); +} LocGnssConfigurationInterface; + +__END_DECLS + +#endif /* LOC_GPS_H */ + |