audio/effect/2.0/IDownmixEffect.hal

/*
 * Copyright (C) 2016 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.audio.effect@2.0;

import android.hardware.audio.common@2.0;
import IEffect;

interface IDownmixEffect extends IEffect {
    enum Type : int32_t {
        STRIP, // throw away the extra channels
        FOLD   // mix the extra channels with FL/FR
    };

    /**
     * Sets the current downmix preset.
     */
    setType(Type preset) generates (Result retval);

    /**
     * Gets the current downmix preset.
     */
    getType() generates (Result retval, Type preset);
};