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78 lines
2.6 KiB
78 lines
2.6 KiB
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.hardware.audio.effect@4.0;
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import android.hardware.audio.common@4.0;
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import IEffect;
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interface IVirtualizerEffect extends IEffect {
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/**
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* Returns whether setting virtualization strength is supported.
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*/
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isStrengthSupported() generates (bool strengthSupported);
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enum StrengthRange : uint16_t {
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MIN = 0,
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MAX = 1000
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};
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/**
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* Sets virtualization strength.
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*
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* @param strength strength of the effect. The valid range for strength
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* strength is [0, 1000], where 0 per mille designates the
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* mildest effect and 1000 per mille designates the
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* strongest.
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* @return retval operation completion status.
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*/
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setStrength(uint16_t strength) generates (Result retval);
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/**
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* Gets virtualization strength.
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*/
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getStrength() generates (Result retval, uint16_t strength);
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struct SpeakerAngle {
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/** Speaker channel mask */
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bitfield<AudioChannelMask> mask;
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// all angles are expressed in degrees and
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// are relative to the listener.
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int16_t azimuth; // 0 is the direction the listener faces
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// 180 is behind the listener
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// -90 is to their left
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int16_t elevation; // 0 is the horizontal plane
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// +90 is above the listener, -90 is below
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};
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/**
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* Retrieves virtual speaker angles for the given channel mask on the
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* specified device.
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*/
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getVirtualSpeakerAngles(bitfield<AudioChannelMask> mask, AudioDevice device)
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generates (Result retval, vec<SpeakerAngle> speakerAngles);
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/**
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* Forces the virtualizer effect for the given output device.
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*/
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forceVirtualizationMode(AudioDevice device) generates (Result retval);
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/**
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* Returns audio device reflecting the current virtualization mode,
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* AUDIO_DEVICE_NONE when not virtualizing.
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*/
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getVirtualizationMode() generates (Result retval, AudioDevice device);
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};
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