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/*
* Copyright (C) 2018 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@4.0;
import android.hardware.audio.common@4.0;
import IEffect;
interface IVirtualizerEffect extends IEffect {
/**
* Returns whether setting virtualization strength is supported.
*/
isStrengthSupported() generates (bool strengthSupported);
enum StrengthRange : uint16_t {
MIN = 0,
MAX = 1000
};
/**
* Sets virtualization strength.
*
* @param strength strength of the effect. The valid range for strength
* strength is [0, 1000], where 0 per mille designates the
* mildest effect and 1000 per mille designates the
* strongest.
* @return retval operation completion status.
*/
setStrength(uint16_t strength) generates (Result retval);
/**
* Gets virtualization strength.
*/
getStrength() generates (Result retval, uint16_t strength);
struct SpeakerAngle {
AudioChannelMask mask; // speaker channel mask (1 bit set).
// all angles are expressed in degrees and
// are relative to the listener.
int16_t azimuth; // 0 is the direction the listener faces
// 180 is behind the listener
// -90 is to their left
int16_t elevation; // 0 is the horizontal plane
// +90 is above the listener, -90 is below
};
/**
* Retrieves virtual speaker angles for the given channel mask on the
* specified device.
*/
getVirtualSpeakerAngles(AudioChannelMask mask, AudioDevice device)
generates (Result retval, vec<SpeakerAngle> speakerAngles);
/**
* Forces the virtualizer effect for the given output device.
*/
forceVirtualizationMode(AudioDevice device) generates (Result retval);
/**
* Returns audio device reflecting the current virtualization mode,
* AUDIO_DEVICE_NONE when not virtualizing.
*/
getVirtualizationMode() generates (Result retval, AudioDevice device);
};
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