tv/tuner/1.0/ILnb.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.tv.tuner@1.0;

/**
 * A Tuner LNB (low-noise block downconverter) is used by satellite frontend
 * to receive the microwave signal from the satellite, amplify it, and
 * downconvert the frequency to a lower frequency.
 */
interface ILnb {
    /**
     * Set the lnb's power voltage.
     *
     * @param voltage the power's voltage the Lnb to use.
     * @return result Result status of the operation.
     *         SUCCESS if successful,
     *         INVALID_ARGUMENT if the selected voltage isn't allowed,
     *         UNKNOWN_ERROR if failed for other reasons.
     */
    setVoltage(FrontendLnbVoltage voltage) generates (Result result);

    /**
     * Set the lnb's tone mode.
     *
     * @param tone the tone mode the Lnb to use.
     * @return result Result status of the operation.
     *         SUCCESS if successful,
     *         INVALID_ARGUMENT if the selected tone mode isn't allowed,
     *         UNKNOWN_ERROR if failed for other reasons.
     */
    setTone(FrontendLnbTone tone) generates (Result result);

    /**
     * Select the lnb's position.
     *
     * @param position the position the Lnb to use.
     * @return result Result status of the operation.
     *         SUCCESS if successful,
     *         INVALID_ARGUMENT if the selected position isn't allowed,
     *         UNKNOWN_ERROR if failed for other reasons.
     */
    setSatellitePosition(FrontendLnbPosition position) generates (Result result);

    /**
     * Releases the LNB instance
     *
     * Associated resources are released.  close may be called more than once.
     * Calls to any other method after this will return an error
     *
     * @return result Result status of the operation.
     *         SUCCESS if successful,
     *         UNKNOWN_ERROR if failed for other reasons.
     */
    close() generates (Result result);
};