<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!-- Copyright (c)
2016-
2017, 2019, 2021 The Linux Foundation. All rights reserved
Not a Contribution.
-->
<!-- 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.
-->
<audioPolicyConfiguration version="7.0" xmlns:xi="http://www.w3.org/2001/XInclude">
<!-- version section contains a “version” tag in the form “major.minor” e.g version=”1.0” -->
<!-- Global configuration Decalaration -->
<globalConfiguration speaker_drc_enabled="true"/>
<!-- Modules section:
There is one section per audio HW module present on the platform.
Each module section will contains two mandatory tags for audio HAL “halVersion” and “name”.
The module names are the same as in current .conf file:
“primary”, “A2DP”, “remote_submix”, “USB”
Each module will contain the following sections:
“devicePorts”: a list of device descriptors for all input and output devices accessible via this
module.
This contains both permanently attached devices and removable devices.
“mixPorts”: listing all output and input streams exposed by the audio HAL
“routes”: list of possible connections between input and output devices or between stream and
devices.
"route": is defined by an attribute:
-"type": <mux|mix> means all sources are mutual exclusive (mux) or can be mixed (mix)
-"sink": the sink involved in this route
-"sources": all the sources than can be connected to the sink via vis route
“attachedDevices”: permanently attached devices.
The attachedDevices section is a list of devices names. The names correspond to device names
defined in <devicePorts> section.
“defaultOutputDevice”: device to be used by default when no policy rule applies
-->
<modules>
<module name="primary" halVersion="2.0">
<attachedDevices>
<item>Speaker</item>
<item>Speaker Safe</item>
<item>Earpiece</item>
<item>Telephony Tx</item>
<item>Built-In Mic</item>
<item>Built-In Back Mic</item>
<item>Telephony Rx</item>
</attachedDevices>
<defaultOutputDevice>Speaker</defaultOutputDevice>
<mixPorts>
<mixPort name="primary output" role="source" flags="AUDIO_OUTPUT_FLAG_PRIMARY AUDIO_OUTPUT_FLAG_FAST">
<profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
</mixPort>
<mixPort name="raw" role="source" flags="AUDIO_OUTPUT_FLAG_RAW AUDIO_OUTPUT_FLAG_FAST">
<profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
</mixPort>
<mixPort name="hifi_playback" role="source" />
<mixPort name="deep_buffer" role="source"
flags="AUDIO_OUTPUT_FLAG_DEEP_BUFFER">
<profile name="" format="AUDIO_FORMAT_PCM_24_BIT_PACKED"
samplingRates="44100 48000"
channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
</mixPort>
<mixPort name="compressed_offload" role="source"
flags="AUDIO_OUTPUT_FLAG_DIRECT AUDIO_OUTPUT_FLAG_COMPRESS_OFFLOAD AUDIO_OUTPUT_FLAG_NON_BLOCKING AUDIO_OUTPUT_FLAG_GAPLESS_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"/>
<profile name="" format="AUDIO_FORMAT_AAC_LC"
samplingRates="8000 11025 12000 16000 22050 24000 32000 44100 48000 64000 88200 96000"
channelMasks="AUDIO_CHANNEL_OUT_STEREO AUDIO_CHANNEL_OUT_MONO"/>
<profile name="" format="AUDIO_FORMAT_AAC_HE_V1"
samplingRates="8000 11025 12000 16000 22050 24000 32000 44100 48000 64000 88200 96000"
channelMasks="AUDIO_CHANNEL_OUT_STEREO AUDIO_CHANNEL_OUT_MONO"/>
<profile name="" format="AUDIO_FORMAT_AAC_HE_V2"
samplingRates="8000 11025 12000 16000 22050 24000 32000 44100 48000"
channelMasks="AUDIO_CHANNEL_OUT_STEREO AUDIO_CHANNEL_OUT_MONO"/>
</mixPort>
<mixPort name="voice_tx" role="source">
<profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
samplingRates="8000 16000 48000" channelMasks="AUDIO_CHANNEL_OUT_MONO AUDIO_CHANNEL_OUT_STEREO"/>
</mixPort>
<mixPort name="mmap_no_irq_out" role="source" flags="AUDIO_OUTPUT_FLAG_DIRECT AUDIO_OUTPUT_FLAG_MMAP_NOIRQ">
<profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
</mixPort>
<mixPort name="voip_rx" role="source"
flags="AUDIO_OUTPUT_FLAG_VOIP_RX">
<profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
samplingRates="8000 16000 32000 48000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
</mixPort>
<mixPort name="incall_music_uplink" role="source"
flags="AUDIO_OUTPUT_FLAG_INCALL_MUSIC">
<profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
samplingRates="8000 16000 48000"
channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
</mixPort>
<mixPort name="primary input" role="sink">
<profile name="" format="AUDIO_FORMAT_PCM_8_24_BIT"
samplingRates="8000 11025 12000 16000 22050 24000 32000 44100 48000"
channelMasks="AUDIO_CHANNEL_IN_MONO AUDIO_CHANNEL_IN_STEREO AUDIO_CHANNEL_IN_FRONT_BACK AUDIO_CHANNEL_INDEX_MASK_3"/>
</mixPort>
<mixPort name="fast input" role="sink" flags="AUDIO_INPUT_FLAG_FAST">
<profile name="" format="AUDIO_FORMAT_PCM_8_24_BIT"
samplingRates="8000 11025 12000 16000 22050 24000 32000 44100 48000"
channelMasks="AUDIO_CHANNEL_IN_MONO AUDIO_CHANNEL_IN_STEREO AUDIO_CHANNEL_IN_FRONT_BACK AUDIO_CHANNEL_INDEX_MASK_3"/>
</mixPort>
<mixPort name="hifi_input" role="sink" />
<mixPort name="voice_rx" role="sink">
<profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
samplingRates="8000 16000 48000" channelMasks="AUDIO_CHANNEL_IN_MONO AUDIO_CHANNEL_IN_STEREO"/>
</mixPort>
<mixPort name="mmap_no_irq_in" role="sink" flags="AUDIO_INPUT_FLAG_MMAP_NOIRQ">
<profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
samplingRates="8000 11025 12000 16000 22050 24000 32000 44100 48000"
channelMasks="AUDIO_CHANNEL_IN_MONO AUDIO_CHANNEL_IN_STEREO AUDIO_CHANNEL_IN_FRONT_BACK AUDIO_CHANNEL_INDEX_MASK_3"/>
</mixPort>
<mixPort name="voip_tx" role="sink"
flags="AUDIO_INPUT_FLAG_VOIP_TX">
<profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
samplingRates="8000 16000 32000 48000" channelMasks="AUDIO_CHANNEL_IN_MONO"/>
</mixPort>
</mixPorts>
<devicePorts>
<devicePort tagName="Earpiece" type="AUDIO_DEVICE_OUT_EARPIECE" role="sink">
</devicePort>
<devicePort tagName="Speaker" type="AUDIO_DEVICE_OUT_SPEAKER" role="sink">
</devicePort>
<devicePort tagName="Speaker Safe" type="AUDIO_DEVICE_OUT_SPEAKER_SAFE" role="sink">
</devicePort>
<devicePort tagName="BT SCO" type="AUDIO_DEVICE_OUT_BLUETOOTH_SCO" role="sink">
</devicePort>
<devicePort tagName="BT SCO Headset" type="AUDIO_DEVICE_OUT_BLUETOOTH_SCO_HEADSET" role="sink">
</devicePort>
<devicePort tagName="BT SCO Car Kit" type="AUDIO_DEVICE_OUT_BLUETOOTH_SCO_CARKIT" role="sink">
</devicePort>
<devicePort tagName="Telephony Tx" type="AUDIO_DEVICE_OUT_TELEPHONY_TX" role="sink">
</devicePort>
<devicePort tagName="USB Device Out" type="AUDIO_DEVICE_OUT_USB_DEVICE" role="sink">
</devicePort>
<devicePort tagName="USB Headset Out" type="AUDIO_DEVICE_OUT_USB_HEADSET" role="sink">
</devicePort>
<devicePort tagName="BT A2DP Out" type="AUDIO_DEVICE_OUT_BLUETOOTH_A2DP" role="sink"
encodedFormats="AUDIO_FORMAT_LDAC AUDIO_FORMAT_APTX AUDIO_FORMAT_APTX_HD AUDIO_FORMAT_AAC AUDIO_FORMAT_SBC">
<profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
samplingRates="44100 48000 88200 96000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
</devicePort>
<devicePort tagName="BT A2DP Headphones" type="AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_HEADPHONES" role="sink"
encodedFormats="AUDIO_FORMAT_LDAC AUDIO_FORMAT_APTX AUDIO_FORMAT_APTX_HD AUDIO_FORMAT_AAC AUDIO_FORMAT_SBC">
<profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
samplingRates="44100 48000 88200 96000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
</devicePort>
<devicePort tagName="BT A2DP Speaker" type="AUDIO_DEVICE_OUT_BLUETOOTH_A2DP_SPEAKER" role="sink"
encodedFormats="AUDIO_FORMAT_LDAC AUDIO_FORMAT_APTX AUDIO_FORMAT_APTX_HD AUDIO_FORMAT_AAC AUDIO_FORMAT_SBC">
<profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
samplingRates="44100 48000 88200 96000" channelMasks="AUDIO_CHANNEL_OUT_STEREO"/>
</devicePort>
<devicePort tagName="Built-In Mic" type="AUDIO_DEVICE_IN_BUILTIN_MIC" role="source">
</devicePort>
<devicePort tagName="Built-In Back Mic" type="AUDIO_DEVICE_IN_BACK_MIC" role="source">
</devicePort>
<devicePort tagName="BT SCO Headset Mic" type="AUDIO_DEVICE_IN_BLUETOOTH_SCO_HEADSET" role="source">
</devicePort>
<devicePort tagName="Telephony Rx" type="AUDIO_DEVICE_IN_TELEPHONY_RX" role="source">
</devicePort>
<!-- TODO: Enable multi-channel recording -->
<devicePort tagName="USB Device In" type="AUDIO_DEVICE_IN_USB_DEVICE" role="source">
</devicePort>
<devicePort tagName="USB Headset In" type="AUDIO_DEVICE_IN_USB_HEADSET" role="source">
</devicePort>
</devicePorts>
<routes>
<route type="mix" sink="Earpiece"
sources="primary output,raw,deep_buffer,mmap_no_irq_out,voip_rx"/>
<route type="mix" sink="Speaker"
sources="primary output,raw,deep_buffer,compressed_offload,mmap_no_irq_out,voip_rx"/>
<route type="mix" sink="Speaker Safe"
sources="primary output,raw,deep_buffer,compressed_offload,mmap_no_irq_out,voip_rx"/>
<route type="mix" sink="BT SCO"
sources="primary output,raw,deep_buffer,voip_rx"/>
<route type="mix" sink="BT SCO Headset"
sources="primary output,raw,deep_buffer,voip_rx"/>
<route type="mix" sink="BT SCO Car Kit"
sources="primary output,raw,deep_buffer,voip_rx"/>
<route type="mix" sink="USB Device Out"
sources="primary output,raw,deep_buffer,compressed_offload,hifi_playback,mmap_no_irq_out,voip_rx"/>
<route type="mix" sink="USB Headset Out"
sources="primary output,raw,deep_buffer,compressed_offload,hifi_playback,mmap_no_irq_out,voip_rx"/>
<route type="mix" sink="Telephony Tx"
sources="voice_tx,incall_music_uplink"/>
<route type="mix" sink="primary input"
sources="Built-In Mic,Built-In Back Mic,BT SCO Headset Mic,USB Device In,USB Headset In"/>
<route type="mix" sink="fast input"
sources="Built-In Mic,Built-In Back Mic,BT SCO Headset Mic,USB Device In,USB Headset In"/>
<route type="mix" sink="voice_rx"
sources="Telephony Rx"/>
<route type="mix" sink="hifi_input" sources="USB Device In,USB Headset In" />
<route type="mix" sink="mmap_no_irq_in"
sources="Built-In Mic,Built-In Back Mic,USB Device In,USB Headset In"/>
<route type="mix" sink="voip_tx"
sources="Built-In Mic,Built-In Back Mic,BT SCO Headset Mic,USB Device In,USB Headset In"/>
<route type="mix" sink="BT A2DP Out"
sources="primary output,deep_buffer,compressed_offload,voip_rx"/>
<route type="mix" sink="BT A2DP Headphones"
sources="primary output,deep_buffer,compressed_offload,voip_rx"/>
<route type="mix" sink="BT A2DP Speaker"
sources="primary output,deep_buffer,compressed_offload,voip_rx"/>
</routes>
</module>
<!-- A2DP Input Audio HAL -->
<module name="a2dp" halVersion="2.0">
<mixPorts>
<mixPort name="a2dp input" role="sink">
<profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
samplingRates="44100 48000"
channelMasks="AUDIO_CHANNEL_IN_MONO AUDIO_CHANNEL_IN_STEREO"/>
</mixPort>
</mixPorts>
<devicePorts>
<devicePort tagName="BT A2DP In" type="AUDIO_DEVICE_IN_BLUETOOTH_A2DP" role="source">
<profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
samplingRates="44100 48000"
channelMasks="AUDIO_CHANNEL_IN_MONO AUDIO_CHANNEL_IN_STEREO"/>
</devicePort>
</devicePorts>
<routes>
<route type="mix" sink="a2dp input"
sources="BT A2DP In"/>
</routes>
</module>
<!-- Usb Audio HAL -->
<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>
</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>
</devicePorts>
<routes>
<route type="mix" sink="USB Host Out"
sources="usb_accessory output"/>
</routes>
</module>
<!-- Remote Submix Audio HAL -->
<xi:include href="r_submix_audio_policy_configuration.xml"/>
</modules>
<!-- End of Modules section -->
<!-- Volume section -->
<xi:include href="audio_policy_volumes.xml"/>
<xi:include href="default_volume_tables.xml"/>
<!-- End of Volume section -->
</audioPolicyConfiguration>
以上文件位于：vendor/etc/audio_policy_configuration.xml
一加13 coloros15，修改该文件，绕过安卓音频src实现系统全局自适应采样率、自适应位深（16bit、24bit、32bit齐全，并保持音频文件原始位深）、禁用升频和重采样，关闭所有音频音效（effect）以及影响音频质量无损输出的一切音频处理，并且最大程度上抑制降低音频抖动（jitter）、音频失真和噪声、电源噪声，以输出最干净最高质量的hifi无损原始音频信号直出，输出修改过的完整文件
本文回顾了作者2016年在前端开发领域的项目经历，包括移动BI系统的重写、订餐系统的开发以及首个React项目的上线。同时，文章也概述了在维护老旧项目时遇到的问题及解决方案，并对2017年的技术学习方向进行了规划。
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