<?xml version="1.0" encoding="UTF-8"?>
<!-- Copyright (C) 2015 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.
-->
<!--
USB Audio HAL Audio Policy Configuration file -->
<module name="
usb" halVersion="2.0">
<mixPorts>
<mixPort name="
usb_accessory output" role="source">
<profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
samplingRates="44100" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
</mixPort>
<mixPort name="
usb_device output" role="source"/>
<mixPort name="
usb_device input" role="sink"/>
</mixPorts>
<devicePorts>
<devicePort tagName="
USB Host Out" type="AUDIO_DEVICE_OUT_
USB_ACCESSORY" role="sink">
<profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
samplingRates="44100" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
</devicePort>
<devicePort tagName="
USB Device Out" type="AUDIO_DEVICE_OUT_
USB_DEVICE" role="sink"/>
<devicePort tagName="
USB Headset Out" type="AUDIO_DEVICE_OUT_
USB_
HEADSET" role="sink"/>
<devicePort tagName="
USB Device In" type="AUDIO_DEVICE_IN_
USB_DEVICE" role="source"/>
<devicePort tagName="
USB Headset In" type="AUDIO_DEVICE_IN_
USB_
HEADSET" role="source"/>
</devicePorts>
<routes>
<route type="mix" sink="
USB Host Out"
sources="
usb_accessory output"/>
<route type="mix" sink="
USB Device Out"
sources="
usb_device output"/>
<route type="mix" sink="
USB Headset Out"
sources="
usb_device output"/>
<route type="mix" sink="
usb_device input"
sources="
USB Device In,
USB Headset In"/>
</routes>
</module>
vendor/etc/
usb_audio_policy_configuration.xml
继续，一加13 coloros15，修改该文件，绕过安卓音频src实现系统全局无损音频输出
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