services/audiopolicy/engineconfigurable/config/example/automotive/audio_policy_engine_volumes.xml

<?xml version='1.0' encoding='UTF-8'?>
<!-- Copyright (C) 2018 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.
     -->

<!-- Volume Groups Tables included by Audio Policy Configuration file -->
<!-- Note:
        It is VALID to have a group without attributes if a product strategy is following
        this group for all attributes.
        Otherwise, attributes must be specified
-->

<volumeGroups>
    <volumeGroup>
        <name>oem_traffic_anouncement</name>
        <indexMin>0</indexMin>
        <indexMax>40</indexMax>
        <volume deviceCategory="DEVICE_CATEGORY_SPEAKER">
            <point>0,-4200</point>
            <point>33,-2800</point>
            <point>66,-1400</point>
            <point>100,0</point>
        </volume>
        <volume deviceCategory="DEVICE_CATEGORY_HEADSET">
            <point>0,-4200</point>
            <point>33,-2800</point>
            <point>66,-1400</point>
            <point>100,0</point>
        </volume>
        <volume deviceCategory="DEVICE_CATEGORY_EARPIECE">
            <point>0,-4200</point>
            <point>33,-2800</point>
            <point>66,-1400</point>
            <point>100,0</point>
        </volume>
        <volume deviceCategory="DEVICE_CATEGORY_EXT_MEDIA">
            <point>0,-4200</point>
            <point>33,-2800</point>
            <point>66,-1400</point>
            <point>100,0</point>
        </volume>
    </volumeGroup>

<!-- OEM ADAS is a volume group that has a single port gain (this is the reason why it is a group
     but may host different streams.
     A priority must be given among them (either they are multualy excluisve, so the volume
     will be the one of the currently acitve stream, otherwise a priority must be given by
     any mean. -->
    <volumeGroup>
        <name>oem_adas_2</name>
        <indexMin>0</indexMin>
        <indexMax>40</indexMax>
        <volume deviceCategory="DEVICE_CATEGORY_SPEAKER">
            <point>0,-4200</point>
            <point>33,-2800</point>
            <point>66,-1400</point>
            <point>100,0</point>
        </volume>
        <volume deviceCategory="DEVICE_CATEGORY_HEADSET">
            <point>0,-4200</point>
            <point>33,-2800</point>
            <point>66,-1400</point>
            <point>100,0</point>
        </volume>
    </volumeGroup>
    <volumeGroup>
        <name>oem_adas_3</name>
        <indexMin>0</indexMin>
        <indexMax>40</indexMax>
        <volume deviceCategory="DEVICE_CATEGORY_SPEAKER">
            <point>0,-2400</point>
            <point>33,-1600</point>
            <point>66,-800</point>
            <point>100,0</point>
        </volume>
        <volume deviceCategory="DEVICE_CATEGORY_EARPIECE">
            <point>0,-2400</point>
            <point>33,-1600</point>
            <point>66,-800</point>
            <point>100,0</point>
        </volume>
    </volumeGroup>

<!-- MEDIA is a volume group that has a single port gain (this is the reason why it is a group
     but may host different streams.
     A priority must be given among them (either they are multualy exclusive, so the volume
     will be the one of the active stream with highest priority (ORDER MATTERS) unless the curves
     followed will the the curves for the requested attributes.-->
    <volumeGroup>
        <name>media_car_audio_type_3</name>
        <indexMin>0</indexMin>
        <indexMax>40</indexMax>
        <volume deviceCategory="DEVICE_CATEGORY_SPEAKER">
            <point>0,-4200</point>
            <point>33,-2800</point>
            <point>66,-1400</point>
            <point>100,0</point>
        </volume>
    </volumeGroup>
    <volumeGroup>
        <name>media_car_audio_type_7</name>
        <indexMin>0</indexMin>
        <indexMax>40</indexMax>
        <volume deviceCategory="DEVICE_CATEGORY_SPEAKER">
            <point>0,-2400</point>
            <point>33,-1600</point>
            <point>66,-800</point>
            <point>100,0</point>
        </volume>
    </volumeGroup>
    <volumeGroup>
        <name>media</name>
        <indexMin>0</indexMin>
        <indexMax>40</indexMax>
        <volume deviceCategory="DEVICE_CATEGORY_SPEAKER">
            <point>0,-2400</point>
            <point>33,-1600</point>
            <point>66,-800</point>
            <point>100,0</point>
        </volume>
    </volumeGroup>

    <volumeGroup>
        <name>speech</name>
        <indexMin>1</indexMin>
        <indexMax>40</indexMax>
        <volume deviceCategory="DEVICE_CATEGORY_SPEAKER">
            <point>0,-4200</point>
            <point>33,-2800</point>
            <point>66,-1400</point>
            <point>100,0</point>
        </volume>
    </volumeGroup>

    <volumeGroup>
        <name>system</name>
        <indexMin>0</indexMin>
        <indexMax>40</indexMax>
        <volume deviceCategory="DEVICE_CATEGORY_SPEAKER">
            <point>0,-4200</point>
            <point>33,-2800</point>
            <point>66,-1400</point>
            <point>100,0</point>
        </volume>
    </volumeGroup>

    <volumeGroup>
        <name>phone</name>
        <indexMin>1</indexMin>
        <indexMax>40</indexMax>
        <volume deviceCategory="DEVICE_CATEGORY_SPEAKER">
            <point>0,-4200</point>
            <point>33,-2800</point>
            <point>66,-1400</point>
            <point>100,0</point>
        </volume>
    </volumeGroup>

    <volumeGroup>
        <name>ring</name>
        <indexMin>0</indexMin>
        <indexMax>40</indexMax>
        <volume deviceCategory="DEVICE_CATEGORY_SPEAKER">
            <point>0,-4200</point>
            <point>33,-2800</point>
            <point>66,-1400</point>
            <point>100,0</point>
        </volume>
    </volumeGroup>

    <volumeGroup>
        <name>tts</name>
        <indexMin>0</indexMin>
        <indexMax>15</indexMax>
        <volume deviceCategory="DEVICE_CATEGORY_SPEAKER">
            <point>0,-0</point>
            <point>100,0</point>
        </volume>
    </volumeGroup>

    <volumeGroup>
        <name>rerouting</name>
        <indexMin>0</indexMin>
        <indexMax>1</indexMax>
        <volume deviceCategory="DEVICE_CATEGORY_HEADSET">
            <point>0,0</point>
            <point>100,0</point>
        </volume>
    </volumeGroup>

    <volumeGroup>
        <name>patch</name>
        <indexMin>0</indexMin>
        <indexMax>1</indexMax>
        <volume deviceCategory="DEVICE_CATEGORY_HEADSET">
            <point>0,0</point>
            <point>100,0</point>
        </volume>
    </volumeGroup>

</volumeGroups>