86 lines
3.4 KiB
Text
86 lines
3.4 KiB
Text
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/*
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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.bluetooth.a2dp@1.0;
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import IBluetoothAudioHost;
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/**
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* HAL interface for Bluetooth A2DP Offload functionality where
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* the encoding of the A2DP data packets is offloaded to platform
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* specific encoders. The A2DP control path is maintained in the
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* Bluetooth stack.
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*
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* This interface is from HAL client to HAL server.
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*
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* The HAL client must provide the handle of IBluetoothAudioHost as well
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* as codec configuration to the HAL server, when its connected to an
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* active A2DP Sink device. HAL Server, based on the feedback from the Audio
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* framework must call into the commands provided by the IBluetoothAudioHost.
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* HAL client must call into IBluetoothAudioOffload to provide the status of
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* these commands. Once the device becomes inactive, the HAL client must
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* call the endSession to terminate the session with the HAL server.
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*/
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interface IBluetoothAudioOffload {
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/**
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* Indicates that the HAL client is connected to an A2DP Sink device
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* and is ready to stream audio. This function is also used to register
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* the BluetoothAudioHost interface and the provide the current negotiated
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* codec.
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*
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* |endSession| must be called to unregister the interface.
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*
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* @param hostIf interface used to request stream control
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* @param codecConfig Codec configuration as negotiated with the A2DP Sink
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* device
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* @return status one of the following
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* SUCCESS if HAL server successfully initializes the platform with the
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* given codec configuration
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* UNSUPPORTED_CODEC_CONFIGURATION if HAL server cannot initialize the
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* platform with the given codec configuration
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* FAILURE if HAL server cannot initialize the platform for any other
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* reason
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*/
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startSession(IBluetoothAudioHost hostIf, CodecConfiguration codecConfig) generates (Status status);
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/**
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* Updates status for start stream request. The HAL client may need
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* to communicate to Bluetooth Controller and remote Sink device, in which
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* case it must update with PENDING status. Once the operation is
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* completed, it must return with either SUCCESS or FAILURE.
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*
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* @param status SUCCESS, FAILURE or PENDING
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*/
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oneway streamStarted(Status status);
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/**
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* Updates status for suspend stream request. The HAL client may need
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* to communicate to Bluetooth Controller and remote device, in which case
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* it must update with PENDING status. Once the operation is completed, it
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* must return with either SUCCESS or FAILURE.
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*
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* @param status SUCCESS, FAILURE or PENDING
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*/
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oneway streamSuspended(Status status);
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/**
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* Ends the current A2DP offload session and unregisters the
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* BluetoothAudioHost interface.
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*/
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oneway endSession();
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};
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