shared/auto/audio_policy_configuration.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
/*
** Copyright 2021, 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.
*/
-->

<!--
  Overlay resources to configure car service based on each OEM's preference.
  See also packages/services/Car/service/res/values/config.xml
-->
<audioPolicyConfiguration version="1.0" xmlns:xi="http://www.w3.org/2001/XInclude">
    <!-- Global configuration Decalaration -->
    <globalConfiguration speaker_drc_enabled="true"/>

    <module name="primary" halVersion="2.0">
        <attachedDevices>
            <item>Speaker</item>
            <item>Built-In Mic</item>
        </attachedDevices>
        <defaultOutputDevice>Speaker</defaultOutputDevice>
        <mixPorts>
            <mixPort name="primary output" role="source" flags="AUDIO_OUTPUT_FLAG_PRIMARY">
                <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
                    samplingRates="44100" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
            </mixPort>
            <mixPort name="primary input" role="sink">
                <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
                    samplingRates="8000,16000" channelMasks="AUDIO_CHANNEL_IN_MONO"/>
            </mixPort>
        </mixPorts>
        <devicePorts>
            <devicePort tagName="Speaker" role="sink" type="AUDIO_DEVICE_OUT_BUS"
                address="Speaker">
                <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
                    samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
                <gains>
                    <gain name="" mode="AUDIO_GAIN_MODE_JOINT"
                        minValueMB="-3200" maxValueMB="600" defaultValueMB="0" stepValueMB="100"/>
                </gains>
            </devicePort>

            <devicePort tagName="Built-In Mic" type="AUDIO_DEVICE_IN_BUILTIN_MIC" role="source">
            </devicePort>
        </devicePorts>
        <routes>
            <route type="mix" sink="Speaker"
                sources="primary output"/>
            <route type="mix" sink="primary input"
                sources="Built-In Mic"/>
        </routes>
    </module>

    <xi:include href="audio_policy_volumes.xml"/>
    <xi:include href="default_volume_tables.xml"/>

    <!-- End of Volume section -->
    <!-- End of Modules section -->

</audioPolicyConfiguration>