5f0e90ece7
Add the ability to get a list of supported codecs and their capabilites through the HIDL interface. Bug: 111519504 Test: Compile Change-Id: I61dff240a98d59cb99b526d8988d0d0245140ee4
85 lines
3.4 KiB
Text
85 lines
3.4 KiB
Text
/*
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* Copyright 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.audio@2.0;
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import android.hardware.audio.common@5.0::SourceMetadata;
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/**
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* HAL interface from the Audio HAL to the Bluetooth stack
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*
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* The Audio HAL calls methods in this interface to start, suspend, and stop
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* an audio stream. These calls return immediately and the results, if any,
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* are sent over the IBluetoothAudioProvider interface.
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*
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* Moreover, the Audio HAL can also get the presentation position of the stream
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* and provide stream metadata.
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*
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* Note: For HIDL APIs with a "generates" statement, the callback parameter used
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* for return value must be invoked synchronously before the API call returns.
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*/
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interface IBluetoothAudioPort {
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/**
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* This indicates that the caller of this method has opened the data path
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* and wants to start an audio stream. The caller must wait for a
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* IBluetoothAudioProvider.streamStarted(Status) call.
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*/
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startStream();
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/**
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* This indicates that the caller of this method wants to suspend the audio
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* stream. The caller must wait for the Bluetooth process to call
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* IBluetoothAudioProvider.streamSuspended(Status). The caller still keeps
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* the data path open.
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*/
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suspendStream();
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/**
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* This indicates that the caller of this method wants to stop the audio
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* stream. The data path will be closed after this call. There is no
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* callback from the IBluetoothAudioProvider interface even though the
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* teardown is asynchronous.
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*/
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stopStream();
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/**
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* Get the audio presentation position.
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*
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* @return status the command status
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* @return remoteDeviceAudioDelayNanos the audio delay from when the remote
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* device (e.g. headset) receives audio data to when the device plays the
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* sound. If the delay is unknown, the value is set to zero.
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* @return transmittedOctets the number of audio data octets that were sent
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* to a remote device. This excludes octets that have been written to the
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* data path but have not been sent to the remote device. The count is
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* not reset until stopStream() is called. If the software data path is
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* unused (e.g. A2DP Hardware Offload), the value is set to 0.
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* @return transmittedOctetsTimeStamp the value of CLOCK_MONOTONIC
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* corresponding to transmittedOctets. If the software data path is
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* unused (e.g., for A2DP Hardware Offload), the value is set to zero.
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*/
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getPresentationPosition() generates (Status status,
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uint64_t remoteDeviceAudioDelayNanos, uint64_t transmittedOctets,
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TimeSpec transmittedOctetsTimeStamp);
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/**
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* Called when the metadata of the stream's source has been changed.
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*
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* @param sourceMetadata Description of the audio that is played by the
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* clients.
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*/
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updateMetadata(SourceMetadata sourceMetadata);
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};
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