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/*
* Copyright 2020 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.bluetooth.audio@2.1;
import @2.0::IBluetoothAudioProvider;
import @2.0::IBluetoothAudioPort;
import @2.0::Status;
/**
* HAL interface from the Bluetooth stack to the Audio HAL
*
* The Bluetooth stack calls methods in this interface to start and end audio
* sessions and sends callback events to the Audio HAL.
*
* Note: For HIDL APIs with a "generates" statement, the callback parameter used
* for return value must be invoked synchronously before the API call returns.
*/
interface IBluetoothAudioProvider extends @2.0::IBluetoothAudioProvider {
/**
* This method indicates that the Bluetooth stack is ready to stream audio.
* It registers an instance of IBluetoothAudioPort with and provides the
* current negotiated codec to the Audio HAL. After this method is called,
* the Audio HAL can invoke IBluetoothAudioPort.startStream().
*
* Note: endSession() must be called to unregister this IBluetoothAudioPort
*
* @param hostIf An instance of IBluetoothAudioPort for stream control
* @param audioConfig The audio configuration negotiated with the remote
* device. The PCM parameters are set if software based encoding,
* otherwise the correct codec configuration is used for hardware
* encoding.
*
* @return status One of the following
* SUCCESS if this IBluetoothAudioPort was successfully registered with
* the Audio HAL
* UNSUPPORTED_CODEC_CONFIGURATION if the Audio HAL cannot register this
* IBluetoothAudioPort with the given codec configuration
* FAILURE if the Audio HAL cannot register this IBluetoothAudioPort for
* any other reason
* @return dataMQ The fast message queue for audio data from/to this
* provider. Audio data will be in PCM format as specified by the
* audioConfig.pcmConfig parameter. Invalid if streaming is offloaded
* from/to hardware or on failure.
*/
startSession_2_1(IBluetoothAudioPort hostIf, AudioConfiguration audioConfig)
generates (Status status, fmq_sync<uint8_t> dataMQ);
};
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