gnss/2.1/IGnssConfiguration.hal

/*
 * Copyright (C) 2019 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.
 */

package android.hardware.gnss@2.1;

import @2.0::IGnssConfiguration;
import @2.0::GnssConstellationType;

/**
 * Extended interface for GNSS Configuration support.
 */
interface IGnssConfiguration extends @2.0::IGnssConfiguration {
    /**
     * Represents a blacklisted source, updating the GnssConstellationType to 2.0, which supports
     * IRNSS.
     */
    struct BlacklistedSource {
        /**
         * Defines the constellation of the given satellite(s).
         */
        GnssConstellationType constellation;

        /**
         * Satellite (space vehicle) ID number, as defined in GnssSvInfo::svid
         *
         * Or 0 to blacklist all svid's for the specified constellation
         */
        int16_t svid;
    };

    /**
     * Injects a vector of BlacklistedSource(s) which the HAL must not use to calculate the
     * GNSS location output.
     *
     * The superset of all satellite sources provided, including wildcards, in the latest call
     * to this method, is the set of satellites sources that must not be used in calculating
     * location.
     *
     * All measurements from the specified satellites, across frequency bands, are blacklisted
     * together.
     *
     * If this method is never called after the IGnssConfiguration.hal connection is made on boot,
     * or is called with an empty vector, then no satellites are to be blacklisted as a result of
     * this API.
     *
     * This blacklist must be considered as an additional source of which satellites
     * should not be trusted for location on top of existing sources of similar information
     * such as satellite broadcast health being unhealthy and measurement outlier removal.
     *
     * @param blacklist The BlacklistedSource(s) of satellites the HAL must not use.
     *
     * @return success Whether the HAL accepts and abides by the provided blacklist.
     */
    setBlacklist_2_1(vec<BlacklistedSource> blacklist) generates (bool success);
};