585 lines
66 KiB
HTML
585 lines
66 KiB
HTML
<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-cn" lang="zh-cn" data-whc_version="27.0">
|
||
<head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><meta name="description" content="初始化流程 AudioCodec 模块的初始化流程如下： 释放 clock 和 reset 信号 释放 AudioCodec 模块的全局复位信号 配置 playback 和 capture 的 DMA 传输参数 注册 codec 端 component driver 和 codec_dai driver 注册 platform 端 component driver 和 cpu_dai driver ..."/><meta name="DC.rights.owner" content="(C) 版权 2025"/><meta name="copyright" content="(C) 版权 2025"/><meta name="generator" content="DITA-OT"/><meta name="DC.type" content="concept"/><meta name="DC.relation" content="../../../topics/sdk/audio_codec/audio-codec-design_intro.html"/><meta name="DC.relation" content="../../../topics/sdk/audio_codec/audio-codec-architecture.html"/><meta name="DC.relation" content="../../../topics/sdk/audio_codec/audio-codec-data_structure_design.html"/><meta name="DC.contributor" content="yan.wang"/><meta name="DC.contributor" content="yan.wang"/><meta name="DC.date.modified" content="2024-01-15"/><meta name="DC.format" content="HTML5"/><meta name="DC.identifier" content="audio_codec_key_procedures"/><meta name="DC.language" content="zh-CN"/><title>关键流程设计</title><!-- Generated with build number 2024112209. --><meta name="wh-path2root" content="../../../"/><meta name="wh-toc-id" content="audio_codec_key_procedures-d4445e5890"/><meta name="wh-source-relpath" content="topics/sdk/audio_codec/audio-codec-key_procedures.dita"/><meta name="wh-out-relpath" content="topics/sdk/audio_codec/audio-codec-key_procedures.html"/>
|
||
|
||
<link rel="stylesheet" type="text/css" href="../../../webhelp/app/commons.css?buildId=2024112209"/>
|
||
<link rel="stylesheet" type="text/css" href="../../../webhelp/app/topic.css?buildId=2024112209"/>
|
||
|
||
<script src="../../../webhelp/app/options/properties.js?buildId=20250123154945"></script>
|
||
<script src="../../../webhelp/app/localization/strings.js?buildId=2024112209"></script>
|
||
<script src="../../../webhelp/app/search/index/keywords.js?buildId=20250123154945"></script>
|
||
<script defer="defer" src="../../../webhelp/app/commons.js?buildId=2024112209"></script>
|
||
<script defer="defer" src="../../../webhelp/app/topic.js?buildId=2024112209"></script>
|
||
<link rel="stylesheet" type="text/css" href="../../../webhelp/template/aic-styles-web.css?buildId=2024112209"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/notes.css?buildId=2024112209"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/aic-common.css?buildId=2024112209"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/aic-images.css?buildId=2024112209"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/footnote.css?buildId=2024112209"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/aic-web-watermark.css?buildId=2024112209"/><link rel="stylesheet" type="text/css" href="../../../webhelp/template/topic-body-list.css?buildId=2024112209"/></head>
|
||
|
||
<body id="audio_codec_key_procedures" class="wh_topic_page frmBody">
|
||
<a href="#wh_topic_body" class="sr-only sr-only-focusable">
|
||
跳转到主要内容
|
||
</a>
|
||
|
||
|
||
|
||
|
||
<header class="navbar navbar-default wh_header">
|
||
<div class="container-fluid">
|
||
<div class="wh_header_flex_container navbar-nav navbar-expand-md navbar-dark">
|
||
<div class="wh_logo_and_publication_title_container">
|
||
<div class="wh_logo_and_publication_title">
|
||
|
||
<a href="http://www.artinchip.com" class=" wh_logo d-none d-sm-block "><img src="../../../company-logo-white.png" alt=" Linux SDK 使用指南 SDK 指南文件 "/></a>
|
||
<div class=" wh_publication_title "><a href="../../../index.html"><span class="booktitle"> <span class="ph mainbooktitle">Linux SDK 使用指南</span> <span class="ph booktitlealt">SDK 指南文件</span> </span></a></div>
|
||
|
||
</div>
|
||
|
||
|
||
</div>
|
||
|
||
<div class="wh_top_menu_and_indexterms_link collapse navbar-collapse" id="wh_top_menu_and_indexterms_link">
|
||
|
||
|
||
|
||
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</header>
|
||
|
||
|
||
|
||
|
||
<div class=" wh_search_input navbar-form wh_topic_page_search search " role="form">
|
||
|
||
|
||
|
||
<form id="searchForm" method="get" role="search" action="../../../search.html"><div><input type="search" placeholder="搜索 " class="wh_search_textfield" id="textToSearch" name="searchQuery" aria-label="搜索查询" required="required"/><button type="submit" class="wh_search_button" aria-label="搜索"><span class="search_input_text">搜索</span></button></div></form>
|
||
|
||
|
||
|
||
</div>
|
||
|
||
<div class="container-fluid" id="wh_topic_container">
|
||
<div class="row">
|
||
|
||
<nav class="wh_tools d-print-none navbar-expand-md" aria-label="Tools">
|
||
|
||
<div data-tooltip-position="bottom" class=" wh_breadcrumb "><ol class="d-print-none"><li><span class="home"><a href="../../../index.html"><span>主页</span></a></span></li><li><div class="topicref" data-id="id"><div class="title"><a href="../../../topics/sdk/chapter-advanced-app.html">高级应用</a><div class="wh-tooltip"><p class="shortdesc">系统、存储、多媒体、接口、安全等模块的详细配置和设计说明。</p></div></div></div></li><li><div class="topicref" data-id="concept_mcc_32s_nbc"><div class="title"><a href="../../../topics/chapter-title/chapter-multi-media-sdk.html">多媒体</a><div class="wh-tooltip"><p class="shortdesc">GE、VE、Display、DVP、MPP、MPP 播放器等多媒体模块的介绍和使用说明。</p></div></div></div></li><li><div class="topicref" data-id="audio_codec_user_guide"><div class="title"><a href="../../../topics/sdk/audio_codec/audio-codec-user-guide.html">Audio Codec 使用指南</a></div></div></li><li><div class="topicref" data-id="audio_codec_design_intro"><div class="title"><a href="../../../topics/sdk/audio_codec/audio-codec-design_intro.html">设计说明</a></div></div></li><li class="active"><div class="topicref" data-id="audio_codec_key_procedures"><div class="title"><a href="../../../topics/sdk/audio_codec/audio-codec-key_procedures.html">关键流程设计</a></div></div></li></ol></div>
|
||
|
||
|
||
|
||
<div class="wh_right_tools">
|
||
<button class="wh_hide_highlight" aria-label="切换搜索突出显示" title="切换搜索突出显示"></button>
|
||
<button class="webhelp_expand_collapse_sections" data-next-state="collapsed" aria-label="折叠截面" title="折叠截面"></button>
|
||
<div class=" wh_navigation_links "><span id="topic_navigation_links" class="navheader">
|
||
|
||
<span class="navprev"><a class="- topic/link link" href="../../../topics/sdk/audio_codec/audio-codec-architecture.html" title="Audio Codec 架构" aria-label="上一主题: Audio Codec 架构" rel="prev"></a></span>
|
||
<span class="navnext"><a class="- topic/link link" href="../../../topics/sdk/audio_codec/audio-codec-data_structure_design.html" title="数据结构设计" aria-label="下一主题: 数据结构设计" rel="next"></a></span> </span></div>
|
||
|
||
|
||
|
||
<div class=" wh_print_link print d-none d-md-inline-block "><button onClick="window.print()" title="打印此页" aria-label="打印此页"></button></div>
|
||
|
||
<button type="button" id="wh_toc_button" class="custom-toggler navbar-toggler collapsed wh_toggle_button navbar-light" aria-expanded="false" aria-label="Toggle publishing table of content" aria-controls="wh_publication_toc">
|
||
<span class="navbar-toggler-icon"></span>
|
||
</button>
|
||
</div>
|
||
|
||
</nav>
|
||
</div>
|
||
|
||
|
||
|
||
|
||
<div class="wh_content_area">
|
||
<div class="row">
|
||
|
||
<nav id="wh_publication_toc" class="col-lg-3 col-md-3 col-sm-12 d-md-block d-none d-print-none" aria-label="Table of Contents Container">
|
||
<div id="wh_publication_toc_content">
|
||
|
||
<div class=" wh_publication_toc " data-tooltip-position="right"><span class="expand-button-action-labels"><span id="button-expand-action" role="button" aria-label="Expand"></span><span id="button-collapse-action" role="button" aria-label="Collapse"></span><span id="button-pending-action" role="button" aria-label="Pending"></span></span><ul role="tree" aria-label="Table of Contents"><li role="treeitem"><div data-tocid="revinfo_linux-d4445e1079" class="topicref" data-id="revinfo_linux" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/revinfo/revinfo_linux.html" id="revinfo_linux-d4445e1079-link">修订记录</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d4445e1096" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d4445e1096-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/env/sdk-compile.html" id="id-d4445e1096-link">SDK 编译</a><div class="wh-tooltip"><p class="shortdesc">介绍不同编译环境下 SDK 的详细编译流程。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="tocId-d4445e1240" class="topicref" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action tocId-d4445e1240-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/advanced/lb_usage_commands.html" id="tocId-d4445e1240-link">使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_rcx_czh_pzb-d4445e1360" class="topicref" data-id="concept_rcx_czh_pzb" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_rcx_czh_pzb-d4445e1360-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/chapter-app.html" id="concept_rcx_czh_pzb-d4445e1360-link">应用场景</a><div class="wh-tooltip"><p class="shortdesc">描述了 SDK 在不同应用场景中的配置和使用，包括系统更新、OTA、安全方案等。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d4445e1678" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d4445e1678-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/peripheral/peripheral-intro.html" id="id-d4445e1678-link">外设移植</a><div class="wh-tooltip"><p class="shortdesc"><span class="ph">触摸屏、显示器、WIFI 模块、按键</span>等外设的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d4445e1964" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d4445e1964-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/bringup/chapter-bringup.html" id="id-d4445e1964-link">BringUp</a><div class="wh-tooltip"><p class="shortdesc">在硬件上电后快速初始化系统，为操作系统的启动准备好必要的硬件环境。</p></div></div></div></li><li role="treeitem" aria-expanded="true"><div data-tocid="id-d4445e2153" class="topicref" data-id="id" data-state="expanded"><span role="button" tabindex="0" aria-labelledby="button-collapse-action id-d4445e2153-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/chapter-advanced-app.html" id="id-d4445e2153-link">高级应用</a><div class="wh-tooltip"><p class="shortdesc">系统、存储、多媒体、接口、安全等模块的详细配置和设计说明。</p></div></div></div><ul role="group" class="navbar-nav nav-list"><li role="treeitem" aria-expanded="false"><div data-tocid="uBoot-d4445e2170" class="topicref" data-id="uBoot" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action uBoot-d4445e2170-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/boot/uboot-module.html" id="uBoot-d4445e2170-link">U-Boot</a><div class="wh-tooltip"><p class="shortdesc">启动支持的基本功能以及运行时的基本硬件环境。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_mtx_tk3_pzb-d4445e3028" class="topicref" data-id="concept_mtx_tk3_pzb" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_mtx_tk3_pzb-d4445e3028-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/linux/chapter_linux.html" id="concept_mtx_tk3_pzb-d4445e3028-link">Linux</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-system-d4445e3198" class="topicref" data-id="chapter-system" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-system-d4445e3198-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-system.html" id="chapter-system-d4445e3198-link">系统</a><div class="wh-tooltip"><p class="shortdesc"></p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-memory-d4445e4054" class="topicref" data-id="chapter-memory" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-memory-d4445e4054-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-memory-sdk.html" id="chapter-memory-d4445e4054-link">存储</a><div class="wh-tooltip"><p class="shortdesc">SDMC、SPI NAND、SPI NOR 等存储模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="true"><div data-tocid="concept_mcc_32s_nbc-d4445e4438" class="topicref" data-id="concept_mcc_32s_nbc" data-state="expanded"><span role="button" tabindex="0" aria-labelledby="button-collapse-action concept_mcc_32s_nbc-d4445e4438-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-multi-media-sdk.html" id="concept_mcc_32s_nbc-d4445e4438-link">多媒体</a><div class="wh-tooltip"><p class="shortdesc">GE、VE、Display、DVP、MPP、MPP 播放器等多媒体模块的介绍和使用说明。</p></div></div></div><ul role="group" class="navbar-nav nav-list"><li role="treeitem" aria-expanded="false"><div data-tocid="ge-d4445e4455" class="topicref" data-id="ge" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action ge-d4445e4455-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/ge/ge_user_guide.html" id="ge-d4445e4455-link">GE 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="ve-d4445e4637" class="topicref" data-id="ve" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action ve-d4445e4637-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/ve/ve-user-guide.html" id="ve-d4445e4637-link">VE 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="id-d4445e4777" class="topicref" data-id="id" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action id-d4445e4777-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/display/display_user_guide.html" id="id-d4445e4777-link">Display 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_h4d_fwt_tzb-d4445e5218" class="topicref" data-id="concept_h4d_fwt_tzb" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_h4d_fwt_tzb-d4445e5218-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/dvp/dvp_user_guide.html" id="concept_h4d_fwt_tzb-d4445e5218-link">DVP 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="mpp-d4445e5358" class="topicref" data-id="mpp" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action mpp-d4445e5358-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/mpp/mpp_user_guide.html" id="mpp-d4445e5358-link">MPP 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="mpp_0-d4445e5498" class="topicref" data-id="mpp_0" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action mpp_0-d4445e5498-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/mpp/mpp_player_user_guide.html" id="mpp_0-d4445e5498-link">MPP 播放器使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="gstreamer-d4445e5582" class="topicref" data-id="gstreamer" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action gstreamer-d4445e5582-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/gstreamer/gstreamer-user-guide.html" id="gstreamer-d4445e5582-link">Gstreamer 使用指南</a></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="i2s-d4445e5680" class="topicref" data-id="i2s" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action i2s-d4445e5680-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/i2s/i2s_user_guide.html" id="i2s-d4445e5680-link">I2S 使用指南</a></div></div></li><li role="treeitem" aria-expanded="true"><div data-tocid="audio_codec_user_guide-d4445e5806" class="topicref" data-id="audio_codec_user_guide" data-state="expanded"><span role="button" tabindex="0" aria-labelledby="button-collapse-action audio_codec_user_guide-d4445e5806-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/audio_codec/audio-codec-user-guide.html" id="audio_codec_user_guide-d4445e5806-link">Audio Codec 使用指南</a></div></div><ul role="group" class="navbar-nav nav-list"><li role="treeitem"><div data-tocid="audio_codec_configuration-d4445e5820" class="topicref" data-id="audio_codec_configuration" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/audio_codec/audio-codec-configuration.html" id="audio_codec_configuration-d4445e5820-link">Audio Codec 配置</a></div></div></li><li role="treeitem"><div data-tocid="audio_codec_debug_guide-d4445e5834" class="topicref" data-id="audio_codec_debug_guide" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/audio_codec/audio-codec-debug_guide.html" id="audio_codec_debug_guide-d4445e5834-link">调试指南</a></div></div></li><li role="treeitem"><div data-tocid="audio_codec_test_guide-d4445e5848" class="topicref" data-id="audio_codec_test_guide" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/audio_codec/audio-codec-test_guide.html" id="audio_codec_test_guide-d4445e5848-link">测试指南</a></div></div></li><li role="treeitem" aria-expanded="true"><div data-tocid="audio_codec_design_intro-d4445e5862" class="topicref" data-id="audio_codec_design_intro" data-state="expanded"><span role="button" tabindex="0" aria-labelledby="button-collapse-action audio_codec_design_intro-d4445e5862-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/audio_codec/audio-codec-design_intro.html" id="audio_codec_design_intro-d4445e5862-link">设计说明</a></div></div><ul role="group" class="navbar-nav nav-list"><li role="treeitem"><div data-tocid="audio_codec_architecture-d4445e5876" class="topicref" data-id="audio_codec_architecture" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/audio_codec/audio-codec-architecture.html" id="audio_codec_architecture-d4445e5876-link">Audio Codec 架构</a></div></div></li><li role="treeitem" class="active"><div data-tocid="audio_codec_key_procedures-d4445e5890" class="topicref" data-id="audio_codec_key_procedures" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/audio_codec/audio-codec-key_procedures.html" id="audio_codec_key_procedures-d4445e5890-link">关键流程设计</a></div></div></li><li role="treeitem"><div data-tocid="audio_codec_data_structure_design-d4445e5904" class="topicref" data-id="audio_codec_data_structure_design" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/audio_codec/audio-codec-data_structure_design.html" id="audio_codec_data_structure_design-d4445e5904-link">数据结构设计</a></div></div></li><li role="treeitem"><div data-tocid="audio_codec_interface_design-d4445e5918" class="topicref" data-id="audio_codec_interface_design" data-state="leaf"><span role="button" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/audio_codec/audio-codec-interface_design.html" id="audio_codec_interface_design-d4445e5918-link">接口设计</a></div></div></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="tocId-d4445e5932" class="topicref" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action tocId-d4445e5932-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/sdk/audio_codec/audio-fail-to-find-alsa.conf-file.html" id="tocId-d4445e5932-link">常见问题</a></div></div></li></ul></li></ul></li><li role="treeitem" aria-expanded="false"><div data-tocid="concept_nww_hzh_pzb-d4445e5947" class="topicref" data-id="concept_nww_hzh_pzb" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action concept_nww_hzh_pzb-d4445e5947-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-interface-sdk.html" id="concept_nww_hzh_pzb-d4445e5947-link">接口</a><div class="wh-tooltip"><p class="shortdesc">CAN、CIR、GPAI、GPIO、I2C、PSADC、PWM 等接口模块的介绍和使用说明。</p></div></div></div></li><li role="treeitem" aria-expanded="false"><div data-tocid="chapter-safety-d4445e7944" class="topicref" data-id="chapter-safety" data-state="not-ready"><span role="button" tabindex="0" aria-labelledby="button-expand-action chapter-safety-d4445e7944-link" class="wh-expand-btn"></span><div class="title"><a href="../../../topics/chapter-title/chapter-safety-sdk.html" id="chapter-safety-d4445e7944-link">安全</a><div class="wh-tooltip"><p class="shortdesc">SPI ENC、CE、eFuse 等安全模块的介绍和使用说明。</p></div></div></div></li></ul></li></ul></div>
|
||
|
||
</div>
|
||
</nav>
|
||
|
||
|
||
<div class="col-lg-7 col-md-9 col-sm-12" id="wh_topic_body">
|
||
<button id="wh_close_publication_toc_button" class="close-toc-button d-none" aria-label="Toggle publishing table of content" aria-controls="wh_publication_toc" aria-expanded="true">
|
||
<span class="close-toc-icon-container">
|
||
<span class="close-toc-icon"></span>
|
||
</span>
|
||
</button>
|
||
<button id="wh_close_topic_toc_button" class="close-toc-button d-none" aria-label="Toggle topic table of content" aria-controls="wh_topic_toc" aria-expanded="true">
|
||
<span class="close-toc-icon-container">
|
||
<span class="close-toc-icon"></span>
|
||
</span>
|
||
</button>
|
||
|
||
<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1">
|
||
<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" title="Edit this document" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/audio_codec/audio-codec-key_procedures.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">关键流程设计</h1>
|
||
|
||
<div class="date inPage">15 Jan 2024</div><div style="color: gray;">
|
||
Read time: 12 minute(s)
|
||
</div>
|
||
<div class="- topic/body concept/conbody body conbody">
|
||
<section class="- topic/section section" id="audio_codec_key_procedures__section_hv1_h1n_d1c" data-ofbid="audio_codec_key_procedures__section_hv1_h1n_d1c"><h2 class="- topic/title title sectiontitle">初始化流程</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d57970e38__20250123155202">AudioCodec 模块的初始化流程如下：</p>
|
||
<ol class="- topic/ol ol" id="audio_codec_key_procedures__ol_iv1_h1n_d1c" data-ofbid="audio_codec_key_procedures__ol_iv1_h1n_d1c">
|
||
|
||
<li class="- topic/li li" data-ofbid="d57970e43__20250123155202">
|
||
<p class="- topic/p p" data-ofbid="d57970e45__20250123155202">释放 clock 和 reset 信号</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d57970e49__20250123155202">
|
||
<p class="- topic/p p" data-ofbid="d57970e51__20250123155202">释放 AudioCodec 模块的全局复位信号</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d57970e55__20250123155202">
|
||
<p class="- topic/p p" data-ofbid="d57970e57__20250123155202">配置 playback 和 capture 的 DMA 传输参数</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d57970e61__20250123155202">
|
||
<p class="- topic/p p" data-ofbid="d57970e63__20250123155202">注册 codec 端 component driver 和 codec_dai driver</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d57970e67__20250123155202">
|
||
<p class="- topic/p p" data-ofbid="d57970e69__20250123155202">注册 platform 端 component driver 和 cpu_dai driver</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d57970e74__20250123155202">
|
||
<p class="- topic/p p" data-ofbid="d57970e76__20250123155202">创建声卡设备，初始化声卡的各个参数实例</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d57970e80__20250123155202">
|
||
<p class="- topic/p p" data-ofbid="d57970e82__20250123155202">注册声卡</p>
|
||
</li>
|
||
|
||
</ol>
|
||
</section>
|
||
<section class="- topic/section section" id="audio_codec_key_procedures__section_jv1_h1n_d1c" data-ofbid="audio_codec_key_procedures__section_jv1_h1n_d1c"><h2 class="- topic/title title sectiontitle">音频通路设置</h2><p class="- topic/p p" data-ofbid="d57970e91__20250123155202">在 AudioCodec 驱动中，非常重要的环节是音频通路的设置，音频通路是音频数据的流通方向，音频通路设置的正确与否关系到声卡是否能正常工作。Linux 内核中，引入了 DAPM 机制，对音频通路进行动态的上下电管理，降低系统的功耗。AudioCodec 的音频通路设计如下：</p><div class="- topic/p p" data-ofbid="d57970e93__20250123155202"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="audio_codec_key_procedures__image_kv1_h1n_d1c" src="../../../images/audio/audio_data_path.png" alt="data_path"/></div><br/></div><p class="- topic/p p" data-ofbid="d57970e99__20250123155202">如上图所示，在 capture 端，左右声道的音频信号依次经过 DMICI/F、DF、HPF、DVC，输出的 OUT 音频信号可以直接存储到 RXFIFO 中，或是经过混音器 MIX0 或 MIX1 直接输出到 playback 端。capture 通路中，HPF 和 DVC 都可以 bypass，音频信号可以不经过这两个模块的处理，直接旁路到下一个模块。</p><p class="- topic/p p" data-ofbid="d57970e101__20250123155202">在 playback 端，MIX0 和 MIX1 的音频输入信号，可以来自 TXFIFO，也可以来自 OUT。MIX0 和 MIX1 的输出信号依次经过 DVC、IF、FADE、SDM、PWM 输出，实现音频的播放功能。playback 通路中，DVC 和 FADE 都可以 bypass，音频信号可以不经过这两个模块的处理，直接旁路到下一个模块。</p><p class="- topic/p p" data-ofbid="d57970e103__20250123155202">capture 端的音频通路如下图所示：</p><div class="- topic/p p" data-ofbid="d57970e105__20250123155202"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="audio_codec_key_procedures__image_lv1_h1n_d1c" src="../../../images/audio/capture_data_path.png" width="672" alt="capture_data_path"/></div><br/></div><p class="- topic/p p" data-ofbid="d57970e111__20250123155202">playback 端的音频通路如下图所示：</p><div class="- topic/p p" data-ofbid="d57970e113__20250123155202"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="audio_codec_key_procedures__image_mv1_h1n_d1c" src="../../../images/audio/playback_data_path.png" width="672" alt="playback_data_path"/></div><br/></div></section>
|
||
<section class="- topic/section section" id="audio_codec_key_procedures__section_nv1_h1n_d1c" data-ofbid="audio_codec_key_procedures__section_nv1_h1n_d1c"><h2 class="- topic/title title sectiontitle">音频通路的注册</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d57970e125__20250123155202">在 ALSA 的 DAPM 中，音频通路上的结点用 widget 表示，widget 可以认为是对音频控件的进一步封装，它把音频控件和电源管理进行了结合，同时还具备音频路径的连接功能。实现音频通路的注册，需要以下几个步骤：</p>
|
||
<ol class="- topic/ol ol" id="audio_codec_key_procedures__ol_ov1_h1n_d1c" data-ofbid="audio_codec_key_procedures__ol_ov1_h1n_d1c">
|
||
<li class="- topic/li li" data-ofbid="d57970e130__20250123155202">
|
||
<div class="- topic/p p" data-ofbid="d57970e132__20250123155202">先把音频路径中的结点初始化为 widget 类型的实例：<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="audio_codec_key_procedures__codeblock_kbq_31n_d1c" data-ofbid="audio_codec_key_procedures__codeblock_kbq_31n_d1c"><code><strong class="hl-keyword">static</strong> <strong class="hl-keyword">const</strong> <strong class="hl-keyword">struct</strong> snd_soc_dapm_widget aic_codec_dapm_widgets[] = {
|
||
SND_SOC_DAPM_ADC(<span class="hl-string">"DMICIF"</span>, <span class="hl-string">"Capture-dmic"</span>, RX_DMIC_IF_CTRL_REG,
|
||
RX_DMIC_IF_EN, <span class="hl-number">0</span>),
|
||
<em class="hl-comment">/* MUX */</em>
|
||
SND_SOC_DAPM_MUX(<span class="hl-string">"PWM ch0"</span>, TX_PWM_CTRL_REG, TX_PWM0_EN,
|
||
<span class="hl-number">0</span>, &pwm0_output_mux),
|
||
SND_SOC_DAPM_MUX(<span class="hl-string">"PWM ch1"</span>, TX_PWM_CTRL_REG, TX_PWM1_EN,
|
||
<span class="hl-number">0</span>, &pwm1_output_mux),
|
||
SND_SOC_DAPM_MUX(<span class="hl-string">"HPF"</span>, SND_SOC_NOPM, <span class="hl-number">0</span>, <span class="hl-number">0</span>, &hpf_mux),
|
||
SND_SOC_DAPM_MUX(<span class="hl-string">"FADE ch0"</span>, SND_SOC_NOPM, <span class="hl-number">0</span>, <span class="hl-number">0</span>, &fade0_mux),
|
||
SND_SOC_DAPM_MUX(<span class="hl-string">"FADE ch1"</span>, SND_SOC_NOPM, <span class="hl-number">0</span>, <span class="hl-number">0</span>, &fade1_mux),
|
||
SND_SOC_DAPM_MUX(<span class="hl-string">"ADC HPF"</span>, SND_SOC_NOPM, <span class="hl-number">0</span>, <span class="hl-number">0</span>, &adc_hpf_mux),
|
||
|
||
<em class="hl-comment">/* Sigma-Delta Modulation */</em>
|
||
SND_SOC_DAPM_DAC(<span class="hl-string">"SDM ch0"</span>, <span class="hl-string">"Playback"</span>, TX_SDM_CTRL_REG,
|
||
TX_SDM_CH0_EN, <span class="hl-number">0</span>),
|
||
SND_SOC_DAPM_DAC(<span class="hl-string">"SDM ch1"</span>, <span class="hl-string">"Playback"</span>, TX_SDM_CTRL_REG,
|
||
TX_SDM_CH1_EN, <span class="hl-number">0</span>),
|
||
<em class="hl-comment">/* PGA */</em>
|
||
SND_SOC_DAPM_PGA(<span class="hl-string">"DVC 0"</span>, ADC_DVC0_CTRL_REG, ADC_DVC0_CTRL_DVC0_EN,
|
||
<span class="hl-number">0</span>, NULL, <span class="hl-number">0</span>),
|
||
SND_SOC_DAPM_PGA(<span class="hl-string">"DVC 1"</span>, RX_DVC_<span class="hl-number">1</span>_<span class="hl-number">2</span>_CTRL_REG, RX_DVC1_EN, <span class="hl-number">0</span>, NULL, <span class="hl-number">0</span>),
|
||
SND_SOC_DAPM_PGA(<span class="hl-string">"DVC 2"</span>, RX_DVC_<span class="hl-number">1</span>_<span class="hl-number">2</span>_CTRL_REG, RX_DVC2_EN, <span class="hl-number">0</span>, NULL, <span class="hl-number">0</span>),
|
||
SND_SOC_DAPM_PGA(<span class="hl-string">"DVC 3"</span>, TX_DVC_<span class="hl-number">3</span>_<span class="hl-number">4</span>_CTRL_REG, TX_DVC3_EN, <span class="hl-number">0</span>, NULL, <span class="hl-number">0</span>),
|
||
SND_SOC_DAPM_PGA(<span class="hl-string">"DVC 4"</span>, TX_DVC_<span class="hl-number">3</span>_<span class="hl-number">4</span>_CTRL_REG, TX_DVC4_EN, <span class="hl-number">0</span>, NULL, <span class="hl-number">0</span>),
|
||
SND_SOC_DAPM_PGA(<span class="hl-string">"PGA"</span>, ADC_CTL1_REG, ADC_CTL1_PGA_EN, <span class="hl-number">0</span>, NULL, <span class="hl-number">0</span>),
|
||
|
||
<em class="hl-comment">/* Mixer */</em>
|
||
SND_SOC_DAPM_MIXER(<span class="hl-string">"MIXER0"</span>, SND_SOC_NOPM, <span class="hl-number">0</span>, <span class="hl-number">0</span>,
|
||
aic_codec_mixer0_controls,
|
||
ARRAY_SIZE(aic_codec_mixer0_controls)),
|
||
SND_SOC_DAPM_MIXER(<span class="hl-string">"MIXER1"</span>, SND_SOC_NOPM, <span class="hl-number">0</span>, <span class="hl-number">0</span>,
|
||
aic_codec_mixer1_controls,
|
||
ARRAY_SIZE(aic_codec_mixer1_controls)),
|
||
|
||
<em class="hl-comment">/* SUPPLY */</em>
|
||
SND_SOC_DAPM_SUPPLY(<span class="hl-string">"FADE"</span>, FADE_CTRL0_REG, FADE_CTRL0_EN, <span class="hl-number">0</span>, NULL, <span class="hl-number">0</span>),
|
||
SND_SOC_DAPM_SUPPLY(<span class="hl-string">"IF"</span>, TX_PLAYBACK_CTRL_REG, TX_PLAYBACK_IF_EN,
|
||
<span class="hl-number">0</span>, NULL, <span class="hl-number">0</span>),
|
||
SND_SOC_DAPM_SUPPLY(<span class="hl-string">"Mic Bias"</span>, ADC_CTL1_REG, ADC_CTL1_MBIAS_EN,
|
||
<span class="hl-number">0</span>, NULL, <span class="hl-number">0</span>),
|
||
SND_SOC_DAPM_SUPPLY(<span class="hl-string">"TX GLBEN"</span>, GLOBE_CTL_REG, GLOBE_TX_GLBEN,
|
||
<span class="hl-number">0</span>, NULL, <span class="hl-number">0</span>),
|
||
SND_SOC_DAPM_SUPPLY(<span class="hl-string">"RX GLBEN"</span>, GLOBE_CTL_REG, GLOBE_RX_GLBEN,
|
||
<span class="hl-number">0</span>, NULL, <span class="hl-number">0</span>),
|
||
|
||
SND_SOC_DAPM_DAC(<span class="hl-string">"IF ch0"</span>, <span class="hl-string">"Playback"</span>, TX_PLAYBACK_CTRL_REG,
|
||
TX_IF_CH0_EN, <span class="hl-number">0</span>),
|
||
SND_SOC_DAPM_DAC(<span class="hl-string">"IF ch1"</span>, <span class="hl-string">"Playback"</span>, TX_PLAYBACK_CTRL_REG,
|
||
TX_IF_CH1_EN, <span class="hl-number">0</span>),
|
||
|
||
<em class="hl-comment">/* AIF OUT */</em>
|
||
SND_SOC_DAPM_AIF_OUT(<span class="hl-string">"AUDOUTL"</span>, <span class="hl-string">"Playback"</span>, <span class="hl-number">0</span>, TXFIFO_CTRL_REG,
|
||
TXFIFO_CH0_EN, <span class="hl-number">0</span>),
|
||
SND_SOC_DAPM_AIF_OUT(<span class="hl-string">"AUDOUTR"</span>, <span class="hl-string">"Playback"</span>, <span class="hl-number">1</span>, TXFIFO_CTRL_REG,
|
||
TXFIFO_CH1_EN, <span class="hl-number">0</span>),
|
||
|
||
<em class="hl-comment">/* AIF IN */</em>
|
||
SND_SOC_DAPM_AIF_IN(<span class="hl-string">"DMICOUTL"</span>, <span class="hl-string">"Capture-dmic"</span>, <span class="hl-number">0</span>, DMIC_RXFIFO_CTRL_REG,
|
||
DMIC_RXFIFO_CH0_EN, <span class="hl-number">0</span>),
|
||
SND_SOC_DAPM_AIF_IN(<span class="hl-string">"DMICOUTR"</span>, <span class="hl-string">"Capture-dmic"</span>, <span class="hl-number">1</span>, DMIC_RXFIFO_CTRL_REG,
|
||
DMIC_RXFIFO_CH1_EN, <span class="hl-number">0</span>),
|
||
SND_SOC_DAPM_AIF_IN(<span class="hl-string">"ADCOUT"</span>, <span class="hl-string">"Capture-adc"</span>, <span class="hl-number">0</span>, ADC_RXFIFO_CTRL_REG,
|
||
ADC_RXFIFO_EN, <span class="hl-number">0</span>),
|
||
<em class="hl-comment">/* ADC */</em>
|
||
SND_SOC_DAPM_ADC(<span class="hl-string">"ADC"</span>, <span class="hl-string">"ADC Capture-adc"</span>, ADC_CTL1_REG,
|
||
ADC_CTL1_ADC_EN, <span class="hl-number">0</span>),
|
||
|
||
SND_SOC_DAPM_INPUT(<span class="hl-string">"AMIC"</span>),
|
||
SND_SOC_DAPM_INPUT(<span class="hl-string">"DMIC"</span>),
|
||
SND_SOC_DAPM_OUTPUT(<span class="hl-string">"SPK_OUT0"</span>),
|
||
SND_SOC_DAPM_OUTPUT(<span class="hl-string">"SPK_OUT1"</span>),
|
||
};</code></pre></div>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d57970e138__20250123155202">
|
||
<p class="- topic/p p" data-ofbid="d57970e140__20250123155202">利用实例化的 widget 定义 route 信息。DAPM 中，利用 route 结构体表示两个 widget 的连接关系。struct snd_soc_dapm_route 按照
|
||
<em class="+ topic/ph hi-d/i ph i">{“目的 widget”, “控件”， “源 widget”}</em> 的方式进行定义。</p>
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="audio_codec_key_procedures__codeblock_xs5_31n_d1c" data-ofbid="audio_codec_key_procedures__codeblock_xs5_31n_d1c"><code><strong class="hl-keyword">static</strong> <strong class="hl-keyword">const</strong> <strong class="hl-keyword">struct</strong> snd_soc_dapm_route aic_codec_dapm_route[] = {
|
||
{<span class="hl-string">"DMICOUTL"</span>, NULL, <span class="hl-string">"RX GLBEN"</span>},
|
||
{<span class="hl-string">"DMICOUTR"</span>, NULL, <span class="hl-string">"RX GLBEN"</span>},
|
||
{<span class="hl-string">"DMICIF"</span>, NULL, <span class="hl-string">"DMIC"</span>},
|
||
{<span class="hl-string">"HPF"</span>, <span class="hl-string">"Bypass"</span>, <span class="hl-string">"DMICIF"</span>},
|
||
{<span class="hl-string">"HPF"</span>, <span class="hl-string">"HPF Enable"</span>, <span class="hl-string">"DMICIF"</span>},
|
||
{<span class="hl-string">"DVC 1"</span>, NULL, <span class="hl-string">"HPF"</span>},
|
||
{<span class="hl-string">"DVC 2"</span>, NULL, <span class="hl-string">"HPF"</span>},
|
||
{<span class="hl-string">"DMICOUTL"</span>, NULL, <span class="hl-string">"DVC 1"</span>},
|
||
{<span class="hl-string">"DMICOUTR"</span>, NULL, <span class="hl-string">"DVC 2"</span>},
|
||
#ifdef CONFIG_SND_SOC_AIC_CODEC_V1
|
||
{<span class="hl-string">"ADCOUT"</span>, NULL, <span class="hl-string">"RX GLBEN"</span>},
|
||
{<span class="hl-string">"AMIC"</span>, NULL, <span class="hl-string">"Mic Bias"</span>},
|
||
{<span class="hl-string">"PGA"</span>, NULL, <span class="hl-string">"AMIC"</span>},
|
||
{<span class="hl-string">"ADC"</span>, NULL, <span class="hl-string">"PGA"</span>},
|
||
{<span class="hl-string">"ADC HPF"</span>, <span class="hl-string">"Bypass"</span>, <span class="hl-string">"ADC"</span>},
|
||
{<span class="hl-string">"ADC HPF"</span>, <span class="hl-string">"HPF Enable"</span>, <span class="hl-string">"ADC"</span>},
|
||
{<span class="hl-string">"DVC 0"</span>, NULL, <span class="hl-string">"ADC HPF"</span>},
|
||
{<span class="hl-string">"ADCOUT"</span>, NULL, <span class="hl-string">"DVC 0"</span>},
|
||
#endif
|
||
|
||
{<span class="hl-string">"AUDOUTL"</span>, NULL, <span class="hl-string">"TX GLBEN"</span>},
|
||
{<span class="hl-string">"AUDOUTR"</span>, NULL, <span class="hl-string">"TX GLBEN"</span>},
|
||
<em class="hl-comment">/* MIXER */</em>
|
||
{<span class="hl-string">"MIXER0"</span>, <span class="hl-string">"audoutl switch"</span>, <span class="hl-string">"AUDOUTL"</span>},
|
||
{<span class="hl-string">"MIXER0"</span>, <span class="hl-string">"audoutr switch"</span>, <span class="hl-string">"AUDOUTR"</span>},
|
||
{<span class="hl-string">"MIXER0"</span>, <span class="hl-string">"dmicoutl switch"</span>, <span class="hl-string">"DMICOUTL"</span>},
|
||
{<span class="hl-string">"MIXER0"</span>, <span class="hl-string">"dmicoutr switch"</span>, <span class="hl-string">"DMICOUTR"</span>},
|
||
#ifdef CONFIG_SND_SOC_AIC_CODEC_V1
|
||
{<span class="hl-string">"MIXER0"</span>, <span class="hl-string">"adcout switch"</span>, <span class="hl-string">"ADCOUT"</span>},
|
||
#endif
|
||
|
||
{<span class="hl-string">"MIXER1"</span>, <span class="hl-string">"audoutl switch"</span>, <span class="hl-string">"AUDOUTL"</span>},
|
||
{<span class="hl-string">"MIXER1"</span>, <span class="hl-string">"audoutr switch"</span>, <span class="hl-string">"AUDOUTR"</span>},
|
||
{<span class="hl-string">"MIXER1"</span>, <span class="hl-string">"dmicoutl switch"</span>, <span class="hl-string">"DMICOUTL"</span>},
|
||
{<span class="hl-string">"MIXER1"</span>, <span class="hl-string">"dmicoutr switch"</span>, <span class="hl-string">"DMICOUTR"</span>},
|
||
#ifdef CONFIG_SND_SOC_AIC_CODEC_V1
|
||
{<span class="hl-string">"MIXER1"</span>, <span class="hl-string">"adcout switch"</span>, <span class="hl-string">"ADCOUT"</span>},
|
||
#endif
|
||
|
||
{<span class="hl-string">"FADE ch0"</span>, NULL, <span class="hl-string">"FADE"</span>},
|
||
{<span class="hl-string">"FADE ch1"</span>, NULL, <span class="hl-string">"FADE"</span>},
|
||
{<span class="hl-string">"IF ch0"</span>, NULL, <span class="hl-string">"IF"</span>},
|
||
{<span class="hl-string">"IF ch1"</span>, NULL, <span class="hl-string">"IF"</span>},
|
||
|
||
{<span class="hl-string">"DVC 3"</span>, NULL, <span class="hl-string">"MIXER0"</span>},
|
||
{<span class="hl-string">"IF ch0"</span>, NULL, <span class="hl-string">"DVC 3"</span>},
|
||
{<span class="hl-string">"FADE ch0"</span>, <span class="hl-string">"Bypass"</span>, <span class="hl-string">"IF ch0"</span>},
|
||
{<span class="hl-string">"FADE ch0"</span>, <span class="hl-string">"Fade Enable"</span>, <span class="hl-string">"IF ch0"</span>},
|
||
{<span class="hl-string">"SDM ch0"</span>, NULL, <span class="hl-string">"FADE ch0"</span>},
|
||
{<span class="hl-string">"PWM ch0"</span>, <span class="hl-string">"Single_ended"</span>, <span class="hl-string">"SDM ch0"</span>},
|
||
{<span class="hl-string">"PWM ch0"</span>, <span class="hl-string">"Differential"</span>, <span class="hl-string">"SDM ch0"</span>},
|
||
{<span class="hl-string">"SPK_OUT0"</span>, NULL, <span class="hl-string">"PWM ch0"</span>},
|
||
|
||
{<span class="hl-string">"DVC 4"</span>, NULL, <span class="hl-string">"MIXER1"</span>},
|
||
{<span class="hl-string">"IF ch1"</span>, NULL, <span class="hl-string">"DVC 4"</span>},
|
||
{<span class="hl-string">"FADE ch1"</span>, <span class="hl-string">"Bypass"</span>, <span class="hl-string">"IF ch1"</span>},
|
||
{<span class="hl-string">"FADE ch1"</span>, <span class="hl-string">"Fade Enable"</span>, <span class="hl-string">"IF ch1"</span>},
|
||
{<span class="hl-string">"SDM ch1"</span>, NULL, <span class="hl-string">"FADE ch1"</span>},
|
||
{<span class="hl-string">"PWM ch1"</span>, <span class="hl-string">"Single_ended"</span>, <span class="hl-string">"SDM ch1"</span>},
|
||
{<span class="hl-string">"PWM ch1"</span>, <span class="hl-string">"Differential"</span>, <span class="hl-string">"SDM ch1"</span>},
|
||
{<span class="hl-string">"SPK_OUT1"</span>, NULL, <span class="hl-string">"PWM ch1"</span>},
|
||
};</code></pre>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d57970e150__20250123155202">
|
||
<div class="- topic/p p" data-ofbid="d57970e152__20250123155202">将上面定义的两个数组赋值给 codec 的 component
|
||
driver<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="audio_codec_key_procedures__codeblock_d1x_k1n_d1c" data-ofbid="audio_codec_key_procedures__codeblock_d1x_k1n_d1c"><code><strong class="hl-keyword">static</strong> <strong class="hl-keyword">const</strong> <strong class="hl-keyword">struct</strong> snd_soc_component_driver aic_codec_component = {
|
||
.controls = aic_codec_controls,
|
||
.num_controls = ARRAY_SIZE(aic_codec_controls),
|
||
.dapm_widgets = aic_codec_dapm_widgets,
|
||
.num_dapm_widgets = ARRAY_SIZE(aic_codec_dapm_widgets),
|
||
.dapm_routes = aic_codec_dapm_route,
|
||
.num_dapm_routes = ARRAY_SIZE(aic_codec_dapm_route),
|
||
.idle_bias_on = <span class="hl-number">1</span>,
|
||
.use_pmdown_time = <span class="hl-number">1</span>,
|
||
.endianness = <span class="hl-number">1</span>,
|
||
.non_legacy_dai_naming = <span class="hl-number">1</span>,
|
||
};</code></pre></div>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d57970e158__20250123155202">
|
||
<p class="- topic/p p" data-ofbid="d57970e160__20250123155202">调用 component，完成音频路径的注册</p>
|
||
</li>
|
||
</ol>
|
||
</section>
|
||
<section class="- topic/section section" id="audio_codec_key_procedures__section_vv1_h1n_d1c" data-ofbid="audio_codec_key_procedures__section_vv1_h1n_d1c"><h2 class="- topic/title title sectiontitle">音频控件设置</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d57970e171__20250123155202">音频通路是音频数据流通的路径，而音频控件是负责音量大小的调节，以及一些开关的控制等功能。AudioCodec 的音频控件有 DVC 的音量调节，DVC、HPF、FADE 旁路选择，MIX 的增益使能，以及 DMICI/F 数据交换开关等。与音频通路的 widget 不同，音频控件一般是不具有动态上下电控制功能的。音频控件的注册需要三个步骤：</p>
|
||
<ol class="- topic/ol ol" id="audio_codec_key_procedures__ol_wv1_h1n_d1c" data-ofbid="audio_codec_key_procedures__ol_wv1_h1n_d1c">
|
||
<li class="- topic/li li" data-ofbid="d57970e176__20250123155202">
|
||
<div class="- topic/p p" data-ofbid="d57970e178__20250123155202">定义 new 类型的音频控件<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="audio_codec_key_procedures__codeblock_exg_41n_d1c" data-ofbid="audio_codec_key_procedures__codeblock_exg_41n_d1c"><code><strong class="hl-keyword">static</strong> <strong class="hl-keyword">const</strong> <strong class="hl-keyword">struct</strong> snd_kcontrol_new aic_codec_controls[] = {
|
||
SOC_DOUBLE_TLV(<span class="hl-string">"DMICIN Capture Volume"</span>, RX_DVC_<span class="hl-number">1</span>_<span class="hl-number">2</span>_CTRL_REG,
|
||
RX_DVC1_GAIN, RX_DVC2_GAIN,
|
||
<span class="hl-number">0xFF</span>, <span class="hl-number">0</span>, aic_codec_dvc_scale),
|
||
SOC_DOUBLE_TLV(<span class="hl-string">"AUDIO Playback Volume"</span>, TX_DVC_<span class="hl-number">3</span>_<span class="hl-number">4</span>_CTRL_REG,
|
||
TX_DVC3_GAIN, TX_DVC4_GAIN,
|
||
<span class="hl-number">0xFF</span>, <span class="hl-number">0</span>, aic_codec_dvc_scale),
|
||
#ifdef CONFIG_SND_SOC_AIC_CODEC_V1
|
||
SOC_SINGLE_TLV(<span class="hl-string">"ADC Capture Volume"</span>, ADC_DVC0_CTRL_REG,
|
||
ADC_DVC0_CTRL_DVC0_GAIN,
|
||
<span class="hl-number">0xFF</span>, <span class="hl-number">0</span>, aic_codec_dvc_scale),
|
||
SOC_SINGLE_TLV(<span class="hl-string">"PGA Gain"</span>, ADC_CTL2_REG, ADC_CTL2_PGA_GAIN_SEL,
|
||
<span class="hl-number">0xF</span>, <span class="hl-number">0</span>, aic_pga_scale),
|
||
#endif
|
||
SOC_SINGLE_TLV(<span class="hl-string">"MIX1AUDL Playback Gain"</span>, TX_MIXER_CTRL_REG,
|
||
TX_MIXER1_AUDOUTL_GAIN, <span class="hl-number">1</span>,
|
||
<span class="hl-number">1</span>, aic_mixer_source_gain_scale),
|
||
SOC_SINGLE_TLV(<span class="hl-string">"MIX1AUDR Playback Gain"</span>, TX_MIXER_CTRL_REG,
|
||
TX_MIXER1_AUDOUTR_GAIN, <span class="hl-number">1</span>,
|
||
<span class="hl-number">1</span>, aic_mixer_source_gain_scale),
|
||
SOC_SINGLE_TLV(<span class="hl-string">"MIX1DMICL Playback Gain"</span>, TX_MIXER_CTRL_REG,
|
||
TX_MIXER1_DMICOUTL_GAIN, <span class="hl-number">1</span>,
|
||
<span class="hl-number">1</span>, aic_mixer_source_gain_scale),
|
||
SOC_SINGLE_TLV(<span class="hl-string">"MIX1DMICR Playback Gain"</span>, TX_MIXER_CTRL_REG,
|
||
TX_MIXER1_DMICOUTR_GAIN, <span class="hl-number">1</span>,
|
||
<span class="hl-number">1</span>, aic_mixer_source_gain_scale),
|
||
#ifdef CONFIG_SND_SOC_AIC_CODEC_V1
|
||
SOC_SINGLE_TLV(<span class="hl-string">"MIX1ADC Playback Gain"</span>, TX_MIXER_CTRL_REG,
|
||
TX_MIXER1_ADCOUT_GAIN, <span class="hl-number">1</span>,
|
||
<span class="hl-number">1</span>, aic_mixer_source_gain_scale),
|
||
#endif
|
||
SOC_SINGLE_TLV(<span class="hl-string">"MIX0AUDL Playback Gain"</span>, TX_MIXER_CTRL_REG,
|
||
TX_MIXER0_AUDOUTL_GAIN, <span class="hl-number">1</span>,
|
||
<span class="hl-number">1</span>, aic_mixer_source_gain_scale),
|
||
SOC_SINGLE_TLV(<span class="hl-string">"MIX0AUDR Playback Gain"</span>, TX_MIXER_CTRL_REG,
|
||
TX_MIXER0_AUDOUTR_GAIN, <span class="hl-number">1</span>,
|
||
<span class="hl-number">1</span>, aic_mixer_source_gain_scale),
|
||
SOC_SINGLE_TLV(<span class="hl-string">"MIX0DMICL Playback Gain"</span>, TX_MIXER_CTRL_REG,
|
||
TX_MIXER0_DMICOUTL_GAIN, <span class="hl-number">1</span>,
|
||
<span class="hl-number">1</span>, aic_mixer_source_gain_scale),
|
||
SOC_SINGLE_TLV(<span class="hl-string">"MIX0DMICR Playback Gain"</span>, TX_MIXER_CTRL_REG,
|
||
TX_MIXER0_DMICOUTR_GAIN, <span class="hl-number">1</span>,
|
||
<span class="hl-number">1</span>, aic_mixer_source_gain_scale),
|
||
#ifdef CONFIG_SND_SOC_AIC_CODEC_V1
|
||
SOC_SINGLE_TLV(<span class="hl-string">"MIX0ADC Playback Gain"</span>, TX_MIXER_CTRL_REG,
|
||
TX_MIXER0_ADCOUT_GAIN, <span class="hl-number">1</span>,
|
||
<span class="hl-number">1</span>, aic_mixer_source_gain_scale),
|
||
#endif
|
||
SOC_ENUM(<span class="hl-string">"Data Swap Switch"</span>, dmicif_data_enum),
|
||
SOC_ENUM(<span class="hl-string">"RXFIFO Delay Time"</span>, dmic_rx_dlt_length_enum),
|
||
SOC_ENUM(<span class="hl-string">"RXFIFO Dealy Switch"</span>, dmic_rx_dlt_en_enum),
|
||
SOC_ENUM(<span class="hl-string">"AMIC bias voltage level"</span>, mic_bias_voltage_enum),
|
||
SOC_ENUM(<span class="hl-string">"PWM0 mode select"</span>, pwm0_mode_enum),
|
||
SOC_ENUM(<span class="hl-string">"PWM1 mode select"</span>, pwm1_mode_enum),
|
||
SOC_ENUM(<span class="hl-string">"MIXER0 swicth"</span>, mixer0_enable_enum),
|
||
SOC_ENUM(<span class="hl-string">"MIXER1 swicth"</span>, mixer1_enable_enum),
|
||
};</code></pre></div>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d57970e184__20250123155202">
|
||
<div class="- topic/p p" data-ofbid="d57970e186__20250123155202">将定义的音频控件数组赋值给 codec 的 component
|
||
driver<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="audio_codec_key_procedures__codeblock_zhr_41n_d1c" data-ofbid="audio_codec_key_procedures__codeblock_zhr_41n_d1c"><code><strong class="hl-keyword">static</strong> <strong class="hl-keyword">const</strong> <strong class="hl-keyword">struct</strong> snd_soc_component_driver aic_codec_component = {
|
||
.controls = aic_codec_controls,
|
||
.num_controls = ARRAY_SIZE(aic_codec_controls),
|
||
.dapm_widgets = aic_codec_dapm_widgets,
|
||
.num_dapm_widgets = ARRAY_SIZE(aic_codec_dapm_widgets),
|
||
.dapm_routes = aic_codec_dapm_route,
|
||
.num_dapm_routes = ARRAY_SIZE(aic_codec_dapm_route),
|
||
.idle_bias_on = <span class="hl-number">1</span>,
|
||
.use_pmdown_time = <span class="hl-number">1</span>,
|
||
.endianness = <span class="hl-number">1</span>,
|
||
.non_legacy_dai_naming = <span class="hl-number">1</span>,
|
||
};
|
||
</code></pre></div>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d57970e192__20250123155202">
|
||
<p class="- topic/p p" data-ofbid="d57970e194__20250123155202">调用 component 完成音频控件的注册。</p>
|
||
</li>
|
||
</ol>
|
||
</section>
|
||
<section class="- topic/section section" id="audio_codec_key_procedures__section_bw1_h1n_d1c" data-ofbid="audio_codec_key_procedures__section_bw1_h1n_d1c"><h2 class="- topic/title title sectiontitle">dmaengine_pcm 注册</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d57970e205__20250123155202">在 d211 中，capture 端新增了 amic 通路。在 DMA 传输时，amic 和 dmic 使用不同的 id。所以为了区分不同的 id，在 DTS 中新增了一个结点，用于注册一个新的 pcm 设备。并新增 c 文件，在该文件中实现对新的 pcm 设备的注册。</p>
|
||
</section>
|
||
<section class="- topic/section section" id="audio_codec_key_procedures__section_cw1_h1n_d1c" data-ofbid="audio_codec_key_procedures__section_cw1_h1n_d1c"><h2 class="- topic/title title sectiontitle">period-bytes 对齐</h2>
|
||
|
||
<div class="- topic/p p" data-ofbid="d57970e215__20250123155202">在使用 DMA 传输音频数据时，DMA 要求每次传输的数据长度必须 128bytes/8bytes 对齐。在 ALSA 框架下，音频数据以 period 为周期调用 DMA 传输，每次传输的数据长度为 bytes。所以，必须满足 bytes 按照 128bytes/8bytes 对齐。ALSA 中提供了相应的 API 接口(snd_pcm_hw_constraint_step)来满足这一需求。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="audio_codec_key_procedures__codeblock_vyh_r1n_d1c" data-ofbid="audio_codec_key_procedures__codeblock_vyh_r1n_d1c"><code><strong class="hl-keyword">static</strong> <strong class="hl-keyword">int</strong> aic_codec_startup(<strong class="hl-keyword">struct</strong> snd_pcm_substream *substream,
|
||
<strong class="hl-keyword">struct</strong> snd_soc_dai *dai)
|
||
{
|
||
<strong class="hl-keyword">int</strong> ret;
|
||
|
||
<em class="hl-comment">/* Make sure that the period bytes are 8/128 bytes aligned according to
|
||
* the DMA transfer requested.
|
||
*/</em>
|
||
#ifdef CONFIG_SND_SOC_AIC_CODEC_V1
|
||
ret = snd_pcm_hw_constraint_step(substream->runtime, <span class="hl-number">0</span>,
|
||
SNDRV_PCM_HW_PARAM_PERIOD_BYTES, <span class="hl-number">8</span>);
|
||
<strong class="hl-keyword">if</strong> (ret < <span class="hl-number">0</span>) {
|
||
dev_err(dai->dev, <span class="hl-string">"Could not apply period step: %d\n"</span>, ret);
|
||
<strong class="hl-keyword">return</strong> ret;
|
||
}
|
||
|
||
ret = snd_pcm_hw_constraint_step(substream->runtime, <span class="hl-number">0</span>,
|
||
SNDRV_PCM_HW_PARAM_BUFFER_BYTES, <span class="hl-number">8</span>);
|
||
<strong class="hl-keyword">if</strong> (ret < <span class="hl-number">0</span>) {
|
||
dev_err(dai->dev, <span class="hl-string">"Could not apply buffer step: %d\n"</span>, ret);
|
||
<strong class="hl-keyword">return</strong> ret;
|
||
}
|
||
#<strong class="hl-keyword">else</strong>
|
||
ret = snd_pcm_hw_constraint_step(substream->runtime, <span class="hl-number">0</span>,
|
||
SNDRV_PCM_HW_PARAM_PERIOD_BYTES, <span class="hl-number">128</span>);
|
||
<strong class="hl-keyword">if</strong> (ret < <span class="hl-number">0</span>) {
|
||
dev_err(dai->dev, <span class="hl-string">"Could not apply period step: %d\n"</span>, ret);
|
||
<strong class="hl-keyword">return</strong> ret;
|
||
}
|
||
|
||
ret = snd_pcm_hw_constraint_step(substream->runtime, <span class="hl-number">0</span>,
|
||
SNDRV_PCM_HW_PARAM_BUFFER_BYTES, <span class="hl-number">128</span>);
|
||
<strong class="hl-keyword">if</strong> (ret < <span class="hl-number">0</span>) {
|
||
dev_err(dai->dev, <span class="hl-string">"Could not apply buffer step: %d\n"</span>, ret);
|
||
<strong class="hl-keyword">return</strong> ret;
|
||
}
|
||
#endif
|
||
|
||
<strong class="hl-keyword">return</strong> ret;
|
||
}</code></pre></div>
|
||
</section>
|
||
<section class="- topic/section section" id="audio_codec_key_procedures__section_ew1_h1n_d1c" data-ofbid="audio_codec_key_procedures__section_ew1_h1n_d1c"><h2 class="- topic/title title sectiontitle">pop 音消除</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d57970e226__20250123155202">在音频的驱动设计中，播放上下电时的 pop 音是经常遇到的一个问题。pop 音产生的主要原因如下：</p>
|
||
<ol class="- topic/ol ol" id="audio_codec_key_procedures__ol_fw1_h1n_d1c" data-ofbid="audio_codec_key_procedures__ol_fw1_h1n_d1c">
|
||
<li class="- topic/li li" data-ofbid="d57970e231__20250123155202">
|
||
<p class="- topic/p p" data-ofbid="d57970e233__20250123155202">音频通路中的控件还未全部闭合时，功放却已处于工作状态。此时当其它控件闭合形成播放通路时，通路中电流的变化经功放放大，形成 pop 音。</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d57970e237__20250123155202">
|
||
<p class="- topic/p p" data-ofbid="d57970e239__20250123155202">在正常播放过程中，播放不同采样率的音频文件时，导致 audio 频率切换，此时也容易产生 pop 音。例如，当前播放的是 48K 采样率的音频文件，下一个音频文件的采样率是 22.05K，需要切换 audio 模块的工作频率，切换频率时有可能产生 pop 音。</p>
|
||
</li>
|
||
</ol>
|
||
<p class="- topic/p p" data-ofbid="d57970e244__20250123155202">基于以上原因，为了消除 pop 音的问题，audio 的驱动设计中做了以下几点设计：</p>
|
||
<ol class="- topic/ol ol" id="audio_codec_key_procedures__ol_gw1_h1n_d1c" data-ofbid="audio_codec_key_procedures__ol_gw1_h1n_d1c">
|
||
<li class="- topic/li li" data-ofbid="d57970e249__20250123155202">
|
||
<div class="- topic/p p" data-ofbid="d57970e251__20250123155202">在 DTS 中添加 gpio 引脚，用于控制功放的使能和禁用<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="audio_codec_key_procedures__codeblock_av2_s1n_d1c" data-ofbid="audio_codec_key_procedures__codeblock_av2_s1n_d1c"><code>&codec {
|
||
pinctrl-names = <span class="hl-string">"default"</span>;
|
||
pinctrl-<span class="hl-number">0</span> = <&amic_pins>, <&dmic_pins_a>, <&spk_pins_b>;
|
||
pa-gpios = <&gpio_f <span class="hl-number">13</span> GPIO_ACTIVE_LOW>;
|
||
status = <span class="hl-string">"okay"</span>;
|
||
};</code></pre></div>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d57970e257__20250123155202">
|
||
<div class="- topic/p p" data-ofbid="d57970e259__20250123155202">调整音频通路中的上下电顺序，确保通路最后才使能功放。ALSA 中提供的 widget 宏已经对上下电做好了排序，调用相应的宏定义 widget 即可。<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="audio_codec_key_procedures__codeblock_cpr_s1n_d1c" data-ofbid="audio_codec_key_procedures__codeblock_cpr_s1n_d1c"><code><strong class="hl-keyword">static</strong> <strong class="hl-keyword">const</strong> <strong class="hl-keyword">struct</strong> snd_soc_dapm_widget aic_codec_card_dapm_widgets[] = {
|
||
SND_SOC_DAPM_SPK(<span class="hl-string">"Speaker"</span>, aic_codec_spk_event),
|
||
};
|
||
|
||
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">int</strong> aic_codec_spk_event(<strong class="hl-keyword">struct</strong> snd_soc_dapm_widget *w,
|
||
<strong class="hl-keyword">struct</strong> snd_kcontrol *k, <strong class="hl-keyword">int</strong> event)
|
||
{
|
||
<strong class="hl-keyword">if</strong> (SND_SOC_DAPM_EVENT_ON(event) && !IS_ERR_OR_NULL(gpiod_pa))
|
||
gpiod_set_value(gpiod_pa, <span class="hl-number">1</span>);
|
||
<strong class="hl-keyword">else</strong> <strong class="hl-keyword">if</strong> (SND_SOC_DAPM_EVENT_OFF(event) && !IS_ERR_OR_NULL(gpiod_pa))
|
||
gpiod_set_value(gpiod_pa, <span class="hl-number">0</span>);
|
||
|
||
msleep(<span class="hl-number">100</span>);
|
||
|
||
<strong class="hl-keyword">return</strong> <span class="hl-number">0</span>;
|
||
}
|
||
|
||
<strong class="hl-keyword">static</strong> <strong class="hl-keyword">const</strong> <strong class="hl-keyword">struct</strong> snd_soc_dapm_widget aic_codec_dapm_widgets[] = {
|
||
...
|
||
SND_SOC_DAPM_SUPPLY(<span class="hl-string">"TX GLBEN"</span>, GLOBE_CTL_REG, GLOBE_TX_GLBEN,
|
||
<span class="hl-number">0</span>, NULL, <span class="hl-number">0</span>),
|
||
SND_SOC_DAPM_SUPPLY(<span class="hl-string">"RX GLBEN"</span>, GLOBE_CTL_REG, GLOBE_RX_GLBEN,
|
||
<span class="hl-number">0</span>, NULL, <span class="hl-number">0</span>),
|
||
...
|
||
}</code></pre></div>
|
||
<p class="- topic/p p" data-ofbid="d57970e264__20250123155202">在使能和禁用功放的 widget 时，通过 event 回调函数使能和禁用功放。soc-dapm.c 文件的 seq 和 dapm_down_seq 数组定义了各个 widget 的上下电顺序。而由 SPK 宏定义的功放 widget，处于上电时最后上电，掉电时较早掉电的位置。将 TX 和 RX 的全局使能加入 widget 链路，确保先于功放使能。</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d57970e268__20250123155202">
|
||
<p class="- topic/p p" data-ofbid="d57970e270__20250123155202">audio 需要调整频率时，先关闭功放，频率调整后，再将功放恢复到频率调整前的状态。</p>
|
||
</li>
|
||
</ol>
|
||
</section>
|
||
<section class="- topic/section section" id="audio_codec_key_procedures__section_lw1_h1n_d1c" data-ofbid="audio_codec_key_procedures__section_lw1_h1n_d1c"><h2 class="- topic/title title sectiontitle">创建声卡</h2>
|
||
|
||
<p class="- topic/p p" data-ofbid="d57970e281__20250123155202">创建声卡的一个关键步骤是实现 driver 和 codec driver 的耦合，ALSA 框架中，实现二者耦合是通过 link 实现的。在调用 component 时，会把相应的 platform 和 codec 所对应的 component 注册到链表中。在注册声卡时，会根据 link 中定义的 codecs->dai_name 和 cpus->dai_name 进行查找，如果在链表中可以查找到相应的 dai，则耦合成功，否则会耦合失败。</p>
|
||
</section>
|
||
|
||
|
||
</div>
|
||
</article></main></div>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
</div>
|
||
|
||
<nav role="navigation" id="wh_topic_toc" aria-label="On this page" class="col-lg-2 d-none d-lg-block navbar d-print-none">
|
||
<div id="wh_topic_toc_content">
|
||
|
||
<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#audio_codec_key_procedures__section_hv1_h1n_d1c" data-tocid="audio_codec_key_procedures__section_hv1_h1n_d1c">初始化流程</a></div></li><li class="section-item"><div class="section-title"><a href="#audio_codec_key_procedures__section_jv1_h1n_d1c" data-tocid="audio_codec_key_procedures__section_jv1_h1n_d1c">音频通路设置</a></div></li><li class="section-item"><div class="section-title"><a href="#audio_codec_key_procedures__section_nv1_h1n_d1c" data-tocid="audio_codec_key_procedures__section_nv1_h1n_d1c">音频通路的注册</a></div></li><li class="section-item"><div class="section-title"><a href="#audio_codec_key_procedures__section_vv1_h1n_d1c" data-tocid="audio_codec_key_procedures__section_vv1_h1n_d1c">音频控件设置</a></div></li><li class="section-item"><div class="section-title"><a href="#audio_codec_key_procedures__section_bw1_h1n_d1c" data-tocid="audio_codec_key_procedures__section_bw1_h1n_d1c">dmaengine_pcm 注册</a></div></li><li class="section-item"><div class="section-title"><a href="#audio_codec_key_procedures__section_cw1_h1n_d1c" data-tocid="audio_codec_key_procedures__section_cw1_h1n_d1c">period-bytes 对齐</a></div></li><li class="section-item"><div class="section-title"><a href="#audio_codec_key_procedures__section_ew1_h1n_d1c" data-tocid="audio_codec_key_procedures__section_ew1_h1n_d1c">pop 音消除</a></div></li><li class="section-item"><div class="section-title"><a href="#audio_codec_key_procedures__section_lw1_h1n_d1c" data-tocid="audio_codec_key_procedures__section_lw1_h1n_d1c">创建声卡</a></div></li></ul></div>
|
||
|
||
</div>
|
||
</nav>
|
||
|
||
</div>
|
||
</div>
|
||
|
||
|
||
|
||
</div>
|
||
<footer class="navbar navbar-default wh_footer">
|
||
<div class=" footer-container mx-auto ">
|
||
<title>footer def</title>
|
||
<style><!--
|
||
|
||
.p1 {
|
||
font-family: FangZhengShuSong, Times, serif;
|
||
}
|
||
.p2 {
|
||
font-family: Arial, Helvetica, sans-serif;
|
||
}
|
||
.p3 {
|
||
font-family: "Lucida Console", "Courier New", monospace;
|
||
}
|
||
|
||
--></style>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
<div class="webhelp.fragment.footer">
|
||
<p class="p1">Copyright © 2019-2024 广东匠芯创科技有限公司. All rights reserved.</p>
|
||
</div><div>
|
||
<div class="generation_time">
|
||
Update Time: 2025-01-23
|
||
</div>
|
||
</div>
|
||
</div>
|
||
</footer>
|
||
|
||
<button id="go2top" class="d-print-none" title="返回顶部">
|
||
<span class="oxy-icon oxy-icon-up"></span>
|
||
</button>
|
||
|
||
<div id="modal_img_large" class="modal">
|
||
<span class="close oxy-icon oxy-icon-remove"></span>
|
||
<div id="modal_img_container"></div>
|
||
<div id="caption"></div>
|
||
</div>
|
||
|
||
|
||
<script src="${pd}/publishing/publishing-styles-AIC-template/js/custom.js" defer="defer"></script>
|
||
|
||
|
||
</body>
|
||
</html> |