Simultaneous audio to headphone jack and Bluetooth in Android 13

[MJD]

How can we make audio to play on both headphone jack and Bluetooth paired device in Android 13 build.?

I tried modifying audio_policy_configuration.xml in /out/target/product/evk_8mp/vendor/etc

<route type="mix" sink="Wired Headphones"
                         sources="primary output"/>
<route type="mix" sink="Bluetooth Headset"
                        sources="primary output"/>
<route type="mix" sink="primary input"
                       sources="Wired Headset Mic,Built-In Mic,Spdif-In,BT SCO Headset Mic"/>
But it did not work.

Can any one guide for this.

[brian14]

Hi @MJD, 

Thank you for contacting NXP Support.

By default, this configuration is not supported on our Android Demo Images. On Android, the default behavior is to use the headphone's jack once this has been plugged.
However, on recent releases you can achieve audio streaming on both devices changing audio strategy and using the audio manager APIs for Android HAL.

Here is a link to the Android official documentation to support your requirement:
Combined audio device routing  |  Android Open Source Project

I hope this information will be helpful.

Have a great day!

[MJD]

Hello team, @nxp 

Waiting for your Response. #NXP

evk_8mp:/vendor/etc $ cat audio_policy_configuration.xml

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>

<!-- Copyright (C) 2017 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.

-->

<audioPolicyConfiguration version="7.0" xmlns:xi="http://www.w3.org/2001/XInclude">

    <globalConfiguration speaker_drc_enabled="true"/>

    <modules>

        <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="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>

                </mixPort>

                <mixPort name="lpa output" role="source" flags="AUDIO_OUTPUT_FLAG_DIRECT AUDIO_OUTPUT_FLAG_HW_AV_SYNC">

                    <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"

                             samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>

                </mixPort>

                <mixPort name="hi-res output" role="source" flags="AUDIO_OUTPUT_FLAG_DIRECT AUDIO_OUTPUT_FLAG_HW_AV_SYNC">

                    <profile name="" format="AUDIO_FORMAT_PCM_FLOAT"

                             samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>

                </mixPort>

                <mixPort name="hdmi output" role="source">

                    <profile name="" format="AUDIO_FORMAT_PCM_8_24_BIT"

                             samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>

                </mixPort>

                <mixPort name="bt sco output" role="source">

                    <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"

                             samplingRates="16000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>

                </mixPort>

                <mixPort name="passthrough output" role="source" flags="AUDIO_OUTPUT_FLAG_DIRECT">

                </mixPort>

                <mixPort name="compressed_offload" role="source"

                         flags="AUDIO_OUTPUT_FLAG_DIRECT AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD">

                    <profile name="" format="AUDIO_FORMAT_MP3"

                             samplingRates="8000 11025 12000 16000 22050 24000 32000 44100 48000"

                             channelMasks="AUDIO_CHANNEL_OUT_STEREO AUDIO_CHANNEL_OUT_MONO"/>

                </mixPort>

                <mixPort name="primary input" role="sink">

                    <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"

                             samplingRates="8000 11025 16000 22050 24000 32000 44100 48000"

                             channelMasks="AUDIO_CHANNEL_IN_MONO AUDIO_CHANNEL_IN_STEREO"/>

                </mixPort>

            </mixPorts>

            <devicePorts>

                <devicePort tagName="Speaker" type="AUDIO_DEVICE_OUT_SPEAKER" role="sink" >

                </devicePort>

                <devicePort tagName="Wired Headphones" type="AUDIO_DEVICE_OUT_WIRED_HEADPHONE" role="sink">

                </devicePort>

                <devicePort tagName="Wired Headset" type="AUDIO_DEVICE_OUT_WIRED_HEADSET" role="sink">

                </devicePort>

                <devicePort tagName="Line-Out" type="AUDIO_DEVICE_OUT_LINE" role="sink">

                </devicePort>

                <devicePort tagName="HDMI Out" type="AUDIO_DEVICE_OUT_AUX_DIGITAL" role="sink">

                </devicePort>

                <devicePort tagName="BT SCO Headset" type="AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET" role="sink">

                </devicePort>

                <devicePort tagName="BT SCO CarKit" type="AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT" role="sink">

                </devicePort>

                <devicePort tagName="BT SCO" type="AUDIO_DEVICE_OUT_BLUETOOTH_SCO" role="sink">

                </devicePort>

                <devicePort tagName="Built-In Mic" type="AUDIO_DEVICE_IN_BUILTIN_MIC" role="source">

                </devicePort>

                <devicePort tagName="Wired Headset Mic" type="AUDIO_DEVICE_IN_WIRED_HEADSET" role="source">

                </devicePort>

                <devicePort tagName="Spdif-In" type="AUDIO_DEVICE_IN_AUX_DIGITAL" role="source">

                </devicePort>

                <devicePort tagName="BT SCO Headset Mic" type="AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET" role="source">

                </devicePort>

            </devicePorts>

            <routes>

                <route type="mix" sink="Speaker"

                       sources="primary output"/>

                <route type="mix" sink="Wired Headphones"

                       sources="primary output"/>

                <route type="mix" sink="Wired Headset"

                       sources="primary output"/>

                <route type="mix" sink="Line-Out"

                       sources="compressed_offload,hi-res output,lpa output,primary output"/>

                <route type="mix" sink="HDMI Out"

                       sources="passthrough output,hdmi output"/>

                <route type="mix" sink="BT SCO Headset"

                       sources="primary output"/>

                <route type="mix" sink="BT SCO CarKit"

                       sources="bt sco output"/>

                <route type="mix" sink="BT SCO"

                       sources="primary output"/>

<route type="mix" sink="primary input"

                       sources="Wired Headset Mic,Built-In Mic,Spdif-In,BT SCO Headset Mic"/>

            </routes>

        </module>

        <!-- A2dp Input Audio HAL -->

        <xi:include href="a2dp_in_audio_policy_configuration_7_0.xml"/>

        <!-- Usb Audio HAL -->

        <xi:include href="usb_audio_policy_configuration.xml"/>

        <!-- Remote Submix Audio HAL -->

        <xi:include href="r_submix_audio_policy_configuration.xml"/>

        <!-- Bluetooth Audio HAL -->

        <xi:include href="bluetooth_audio_policy_configuration_7_0.xml"/>

    </modules>

    <!-- Volume section -->

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

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

</audioPolicyConfiguration>