ed7dfd5f35
Add APis for controlling the latency mode on an output stream.
Latency mode control is optional but mandated if spatial audio with
head tracking is supported over Bluetooth classic audio link.
Bug: 187446271
Test: m android.hardware.audio@7.1-impl
Change-Id: I363db3bf7f7b6439e326d0f6f4becc10b3947e7d
(cherry picked from commit 040984fd44)
Merged-In: I363db3bf7f7b6439e326d0f6f4becc10b3947e7d
69 lines
2.6 KiB
Text
69 lines
2.6 KiB
Text
/*
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* Copyright (C) 2022 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@7.1;
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import @7.0::Result;
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import @7.0::IStreamOut;
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import IStreamOutLatencyModeCallback;
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interface IStreamOut extends @7.0::IStreamOut {
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/**
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* Indicates the requested latency mode for this output stream.
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*
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* The requested mode can be one of the modes returned by
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* getRecommendedLatencyModes() API.
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*
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* Optional method.
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* Mandated only on specific spatial audio streams indicated by
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* AUDIO_OUTPUT_FLAG_SPATIALIZER flag if they can be routed to a BT classic sink.
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*
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* @return retval operation completion status.
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*/
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setLatencyMode(LatencyMode mode) generates (Result retval);
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/**
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* Indicates which latency modes are currently supported on this output stream.
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* If the transport protocol (e.g Bluetooth A2DP) used by this output stream to reach
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* the output device supports variable latency modes, the HAL indicates which
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* modes are currently supported.
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* The framework can then call setLatencyMode() with one of the supported modes to select
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* the desired operation mode.
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*
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* Optional method.
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* Mandated only on specific spatial audio streams indicated by
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* AUDIO_OUTPUT_FLAG_SPATIALIZER flag if they can be routed to a BT classic sink.
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*
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* @return retval operation completion status.
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* @return modes currrently supported latency modes.
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*/
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getRecommendedLatencyModes() generates (Result retval, vec<LatencyMode> modes);
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/**
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* Set the callback interface for notifying changes in supported latency modes.
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*
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* Calling this method with a null pointer will result in releasing
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* the callback.
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*
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* Optional method.
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* Mandated only on specific spatial audio streams indicated by
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* AUDIO_OUTPUT_FLAG_SPATIALIZER flag if they can be routed to a BT classic sink.
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*
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* @return retval operation completion status.
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*/
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setLatencyModeCallback(IStreamOutLatencyModeCallback callback) generates (Result retval);
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};
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