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/*
* Copyright (C) 2017 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.automotive.audiocontrol@1.0;
/**
* Interacts with the car's audio subsystem to manage audio sources and volumes
*/
interface IAudioControl {
/**
* Called at startup once per context to get the mapping from ContextNumber to
* busAddress. This lets the car tell the framework to which physical output stream
* each context should be routed.
*
* For every context, a valid bus number (0 - num busses-1) must be returned. If an
* unrecognized contextNumber is encountered, then -1 shall be returned.
*/
getBusForContext(ContextNumber contextNumber)
generates (int32_t busNumber);
/**
* Control the right/left balance setting of the car speakers.
*
* This is intended to shift the speaker volume toward the right (+) or left (-) side of
* the car. 0.0 means "centered". +1.0 means fully right. -1.0 means fully left.
*
* A value outside the range -1 to 1 must be clamped by the implementation to the -1 to 1
* range.
*/
oneway setBalanceTowardRight(float value);
/**
* Control the fore/aft fade setting of the car speakers.
*
* This is intended to shift the speaker volume toward the front (+) or back (-) of the car.
* 0.0 means "centered". +1.0 means fully forward. -1.0 means fully rearward.
*
* A value outside the range -1 to 1 must be clamped by the implementation to the -1 to 1
* range.
*/
oneway setFadeTowardFront(float value);
};
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